Basic SNMP questions from a NOOB
I am completely new to the concept of SNMP and I do not have a strong Linux background either, however, I have been given the task to integrate SNMP into my work environment so we can gather information from our hardware boxes we manufacturer. ** If this is the wrong group/forum to post general noob questions, then please let me know where I should be posting my questions. Here we go Someone here tells me we are running in a Linux (Fedora) environment if that matters. I believe SNMP packages already exist on our Linux systems although no one currently uses it. Also, please keep in mind I am not trying to do anything remarkable here to start off. I simply want to get a real "basic" NetSNMP configured so I can test it out and play around with what it can do. CONFIGURATION --- Anyway, here is a summary of what I have done along with some questions: 1) I downloaded NetSNMP v5.4 and extracted the contents onto my Linux machine into the following directory: /export/home/myname/snmp/net-snmp-5.4/ 2) I downloaded the OC-STB-HOST-MIB which I need to use and placed that into the following directory as: /export/home/myname/snmp/net-snmp-5.4/mibs/OC-STB-HOST-MIB.txt Note: MIB is on page 98 in "http://www.opencable.com/downloads/specs/OC-SP-HOST2.0-CFR-I13-070323.pdf"; 3) I did not want to install NetSnmp in the default location of "/usr/local" since I wanted to play around with it first. As a result I decided to try to install it into "/export/home/myname/snmp/usr/local" location instead. I issued the following "configure" command (and kept all the defaults when prompted to enter selections): ./configure --prefix=/export/home/myname/snmp/usr/local --with-mibs=+OC-STB-HOST-MIB --with-mibdirs="/export/home/myname/snmp/net-snmp-5.4/mibs" 4) After running the configure command, I performed a "make" and then performed a "make install" Note: After the "make install" was performed, I noticed that the "/export/home/myname/snmp/usr/local" directory tree was populated with files now. 5) Finally, I issued the "snmpconf" command to configure a "snmpd.conf" file for my agent. I really did not understand what values I should be using here, so I pretty much did not add anything. now, I do not think this matters since I have general non-agent questions. After performing the above steps, I went to the NetSNMP "tutorials" section and clicked on "snmptranslate". I tried to issue some "snmptranslate" commands on my OC-STB-HOST-MIB file but nothing worked. It could not find my OC-STB-HOST-MIB file. After trying many combinations of options for the "configure" command, I could only get the "snmptranslate" commands working for my MIB after I placed my "OC-STB-HOST-MIB.txt" file into the "/usr/local/share/snmp/mibs" directory and after issuing the following basic "configure" command only: "./configure" Basically, if I included any sort of options for the "configure" command, then NetSnmp would produce the following error: "Cannot find module (+OC-STB-HOST-MIB): At line 1 in none)" What I discovered is that NetSNMP expected my MIB file to be placed in the default "/usr/local/share/snmp/mibs" directory even though I explicitly stated in my "configure" command (see above) that the MIB directory should be "/export/home/myname/snmp/net-snmp-5.4/mibs". I also discovered that it did not like the "--with-mibs=+OC-STB-HOST-MIB" option for the "configure" command as well. If I use this option, then it would produce the error (see above). ** QUESTION 1): Why does NetSNMP not find my MIB file if I place it in the "/export/home/myname/snmp/net-snmp-5.4/mibs" only? ** QUESTION 2): Why does "configure" not like my "--with-mibs" and "--with-mibdirs" command-line options? CODE GENERATION: - I now wanted to generate some code modules (.c/h) for the ocStbHostAVInterfaceTable listed in the OC-STB-HOST-MIB. I picked this table for testing only since there is no need to generate code for all tables and scalars yet. I created the following directory to store the code files: /export/home/myname/snmp/net-snmp-5.4/agent/mibgroup/ocStbHost-mib/ocStbhostAVInterfaceTable/ Before executing the "mib2c" command, I set the "MIBS" environment variable to "MIBS=+OC-STB-HOST-MIB" then ran the following command: mib2c ocStbHostAVInterfaceTable The error below was produced once again: "Cannot find module (+OC-STB-HOST-MIB): At line 1 in none)" ** QUESTION 3) Am I using the MIBS environment varible incorrectly? What am I doing wrong? Now after playing around a bit, I found that if I set the "MIBS" environment variable to "ALL" then the error went away and I was prompted for information. The choices I entered are listed below: 2) Net-SNMP style code 1) tables where the list of rows is external to the agent. This is suited to MIBs which monitor
HELP: libnetsnmpmibs.so.15: cannot open shared object file: No such file or directory
I have been reading the NetSNMP tutorials which indicate how to change the code using the mibs-for-dummies (MFD) configuration file as it relates to the ifTable MIB. Now, I have generated MFD code (using mib2c) for the "ocStbHostAVInterfaceTable" table which is defined in my MIB file, but I used the ifTable tutorial as a guideline. In the last section of the tutorial (link provided below), it indicates I should perform a "make" command to generate an executable file, start the agent and then be able to perform a snmpwalk command for testing of the code I entered. http://www.net-snmp.org/tutorial/tutorial-5/toolkit/mfd/if-mib/ifTable/testing.html The "make -f ocStbHostAVInterfaceTable_Makefile" command I entered seemed to generate the appropriate ".o" files along with a file called "ocStbHostAVInterfaceTable" which I guess is the executable file (not sure??) I now try to execute the following command to start the agent: ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 but the following error is being produced: ./ocStbHostAVInterfaceTable: error while loading shared libraries: libnetsnmpmibs.so.15: cannot open shared object file: No such file or directory I guess it is complaining that is can not find the correct library files it needs. Now the "libnetsnmpmibs.so.15" file does exist in the following directories: /usr/local/lib/libnetsnmpmibs.so.15 /export/home/myname/snmp/usr/local/lib/libnetsnmpmibs.so.15 Does anyone know what I need to do to get NetSnmp to find the library file? I would guess I need to link in the library files at some time, but not sure what that means or how to go about doing this. Here is my configure line I am using: ./configure \ --prefix=/export/home/myname/snmp/usr/local \ --libdir=/export/home/myname/snmp/usr/local/lib \ --srcdir=/export/home/myname/snmp/net-snmp-5.4 \ --enable-embedded-perl \ --enable-shared \ --with-mib-modules="OC-STB-HOST-MIB" - Get the Yahoo! toolbar and be alerted to new email wherever you're surfing. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: HELP: libnetsnmpmibs.so.15: cannot open shared object file: No such file or directory
Currently my LD_LIBRARY_PATH is not set to anything, but I will try it out and let you know if I still have problems. Just curious could I simply set my "PATH" environment variable to include the "/export/home/myname/snmp/usr/local/lib" directory instead of introducing a new environment variable called LD_LIBRARY_PATH?I am just curious I really do not mind having another environment variable . I am just trying to learn different aspects of the setup which can be performed.. Also, I thought the "libdir" option offered by the "configure" command is where I should state the library path . I guess I was wrong.What does "libdir" do for me then? Thanks for the help Magnus Fromreide <[EMAIL PROTECTED]> wrote: On ons, 2007-05-16 at 13:07 -0700, Need Help wrote: > I have been reading the NetSNMP tutorials which indicate how to change > the > code using the mibs-for-dummies (MFD) configuration file as it relates > to > the ifTable MIB. Now, I have generated MFD code (using mib2c) for the > "ocStbHostAVInterfaceTable" table which is defined in my MIB file, but > I > used the ifTable tutorial as a guideline. > > In the last section of the tutorial (link provided below), it > indicates I > should perform a "make" command to generate an executable file, start > the > agent and then be able to perform a snmpwalk command for testing of > the > code I entered. > > > http://www.net-snmp.org/tutorial/tutorial-5/toolkit/mfd/if-mib/ifTable/testing.html > > > The "make -f ocStbHostAVInterfaceTable_Makefile" command I entered > seemed to generate the appropriate ".o" files along with a file called > "ocStbHostAVInterfaceTable" which I guess is the executable file (not > sure??) > > I now try to execute the following command to start the agent: > > ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M > localhost:1161 > > > but the following error is being produced: > > > ./ocStbHostAVInterfaceTable: error while loading shared libraries: > libnetsnmpmibs.so.15: cannot open shared object file: No such file or > directory > > > > I guess it is complaining that is can not find the correct library > files it needs. > Now the "libnetsnmpmibs.so.15" file does exist in the following > directories: > >/usr/local/lib/libnetsnmpmibs.so.15 >/export/home/myname/snmp/usr/local/lib/libnetsnmpmibs.so.15 > > > Does anyone know what I need to do to get NetSnmp to find the library > file? I would guess > I need to link in the library files at some time, but not sure what > that means or how > to go about doing this. You must tell the dynamic linker where it can find the library. One thing you could do is to set the environment variable LD_LIBRARY_PATH to /export/home/myname/snmp/usr/local/lib and then run your program again.ormally you would have installed it to some place where it would be found by the normal dynamic linker but now you are running in a sandbox. /MF > Here is my configure line I am using: > > ./configure \ >--prefix=/export/home/myname/snmp/usr/local \ >--libdir=/export/home/myname/snmp/usr/local/lib \ >--srcdir=/export/home/myname/snmp/net-snmp-5.4 \ >--enable-embedded-perl \ >--enable-shared \ >--with-mib-modules="OC-STB-HOST-MIB" > > > > > __ > Get the Yahoo! toolbar and be alerted to new email wherever you're > surfing. > - > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > ___ Net-snmp-coders mailing list > Net-snmp-coders@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/net-snmp-coders - Looking for a deal? Find great prices on flights and hotels with Yahoo! FareChase.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Help me understand this code snipet please
In order to learn how to use NetSNMP I was reading through the MFD ifTable
tutorial. Part of the code generated for the "ifTable" table (when using the
"mib2c" command with the MFD configuration file) is the following:
if ((rowreq_ctx->data.ifDescr == NULL) ||
(rowreq_ctx->data.ifDescr_len < (ifDescr_len * sizeof(ifDescr[0] {
snmp_log(LOG_ERR, "not enough space for value\n");
return MFD_ERROR;
}
rowreq_ctx->data.ifDescr_len = ifDescr_len * sizeof(ifDescr[0]);
memcpy(rowreq_ctx->data.ifDescr, ifDescr, ifDescr_len * sizeof(ifDescr[0]));
When runnnig this code I get the "not enough space for value" error being
produced. The reason why it fails is due to the length check which is being
performed (shown below):
(rowreq_ctx->data.ifDescr_len < (ifDescr_len * sizeof(ifDescr[0])))
It seems to me that this will always fail since the
"rowreq_ctx->data.ifDescr_len" variable does not get populated until "after"
the "If" check is performed (see code snipet above).
Question:
What am I missing? How can this check (which is generated for me automatically
using mib2c) actually ever work?
PS: Keep in mind that before the code supplied above, I am populating the
"ifDescr_len" variable with a valid length value.
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snmpd.conf: (Warning: no access control information configured)
I generated code using mib2c for a table (ocStbHostAVInterfaceTable) within my MIB file. I then performed a "make" on the code using the "make -f ocStbHostAVInterfaceTable_Makefile" command successfully. Finally I tried to execute the ocStbHostAVInterfaceTable agent with the following: ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 ... and here is the output which is produced . No log handling enabled - turning on stderr logging registered debug token ocStbHostAVInterfaceTable, 1 ocStbHostAVInterfaceTable:init_ocStbHostAVInterfaceTable: Registering ocStbHostAVInterfaceTable as a mibs-for- dummies table. Warning: no access control information configured. It's unlikely this agent can serve any useful purpose in this state. Run "snmpconf -g basic_setup" to help you configure the ocStbHostAVInterfaceTable.conf file for this agent. Here is my configure command: ./configure \ --prefix=/export/home/rosent1/snmp/usr/local \ --srcdir=/export/home/rosent1/snmp/net-snmp-5.4 \ --enable-embedded-perl \ --enable-shared \ --with-mib-modules="OC-STB-HOST-MIB" Here is my "/export/home/myname/snmp/usr/local/share/snmp/snmpd.conf" file contents which I just setup for SNMPV1/2 for read-only access (nothing fancy ... just trying to test basic stuff): ## # # snmpd.conf # # - created by the snmpconf configuration program # # # SECTION: Access Control Setup # # This section defines who is allowed to talk to your running # snmp agent. # rocommunity: a SNMPv1/SNMPv2c read-only access community name # arguments: community [default|hostname|network/bits] [oid] rocommunity mycommunity_ro QUESTION: The error states it does not like my agent configuration file since it does not have any "access control information configured". I executed the "snmpconf -i -g basic_setup" command to generate this snmpd.conf file for me, so I am not sure what needs to be added to allow me to execute the ocStbHostAVInterfaceTable agent. I read somewhere that if the "snmpd.conf" file does not have any access controls then it will not process any requests. I guess this is what is happening to here? Anyway, what must I add to get thsi to work? - Get the free Yahoo! toolbar and rest assured with the added security of spyware protection. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: snmpd.conf: (Warning: no access control information configured)
I guess I am confused about why it is complaining about a "ocStbHostAVInterfaceTable.conf" configuration file as well. I thought I was only dealing with a "snmpd.conf" configuration file only. Perhaps I need to create a "ocStbHostAVInterfaceTable.conf" file somewhere ... somehow? Need Help <[EMAIL PROTECTED]> wrote: I generated code using mib2c for a table (ocStbHostAVInterfaceTable) within my MIB file. I then performed a "make" on the code using the "make -f ocStbHostAVInterfaceTable_Makefile" command successfully. Finally I tried to execute the ocStbHostAVInterfaceTable agent with the following: ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 ... and here is the output which is produced . No log handling enabled - turning on stderr logging registered debug token ocStbHostAVInterfaceTable, 1 ocStbHostAVInterfaceTable:init_ocStbHostAVInterfaceTable: Registering ocStbHostAVInterfaceTable as a mibs-for- dummies table. Warning: no access control information configured. It's unlikely this agent can serve any useful purpose in this state. Run "snmpconf -g basic_setup" to help you configure the ocStbHostAVInterfaceTable.conf file for this agent. Here is my configure command: ./configure \ --prefix=/export/home/rosent1/snmp/usr/local \ --srcdir=/export/home/rosent1/snmp/net-snmp-5.4 \ --enable-embedded-perl \ --enable-shared \ --with-mib-modules="OC-STB-HOST-MIB" Here is my "/export/home/myname/snmp/usr/local/share/snmp/snmpd.conf" file contents which I just setup for SNMPV1/2 for read-only access (nothing fancy ... just trying to test basic stuff): ## # # snmpd.conf # # - created by the snmpconf configuration program # # # SECTION: Access Control Setup # # This section defines who is allowed to talk to your running # snmp agent. # rocommunity: a SNMPv1/SNMPv2c read-only access community name # arguments: community [default|hostname|network/bits] [oid] rocommunity mycommunity_ro QUESTION: The error states it does not like my agent configuration file since it does not have any "access control information configured". I executed the "snmpconf -i -g basic_setup" command to generate this snmpd.conf file for me, so I am not sure what needs to be added to allow me to execute the ocStbHostAVInterfaceTable agent. I read somewhere that if the "snmpd.conf" file does not have any access controls then it will not process any requests. I guess this is what is happening to here? Anyway, what must I add to get thsi to work? - Get the free Yahoo! toolbar and rest assured with the added security of spyware protection. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders - Park yourself in front of a world of choices in alternative vehicles. Visit the Yahoo! Auto Green Center.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: snmpd.conf: (Warning: no access control information configured)
I am trying to learn this stuff from scratch by reading through the tutorial provided for the "ifTable" MIB table.No where does it mention I need to create a specific "ifTable.conf" file in order to run this. Ok, I will give it a go . I am assuming I place it in the same place as the "snmpd.conf" file is located? Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 17 May 2007 12:34:20 -0700 (PDT) Need wrote: NH> I guess I am confused about why it is complaining about a "ocStbHostAVInterfaceTable.conf" configuration file as well. I thought I was only dealing with a "snmpd.conf" configuration file only. But you aren't running snmpd... you are running a specialized application now.. NH> Perhaps I need to create a "ocStbHostAVInterfaceTable.conf" file somewhere ... somehow? Exactly. And it will have the same syntax as snmpd.conf. You can copy or link your snmpd.conf file... - Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: snmpd.conf: (Warning: no access control information configured)
Also, when I change a ".conf" file must I rnu "make install" again? I can not remember if I needed to rerun something once the snmpd.conf file (or any .conf file) changes so perhaps you can let me know? BTW: Thanks for the help Need Help <[EMAIL PROTECTED]> wrote: I am trying to learn this stuff from scratch by reading through the tutorial provided for the "ifTable" MIB table. No where does it mention I need to create a specific "ifTable.conf" file in order to run this. Ok, I will give it a go . I am assuming I place it in the same place as the "snmpd.conf" file is located? Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 17 May 2007 12:34:20 -0700 (PDT) Need wrote: NH> I guess I am confused about why it is complaining about a "ocStbHostAVInterfaceTable.conf" configuration file as well. I thought I was only dealing with a "snmpd.conf" configuration file only. But you aren't running snmpd... you are running a specialized application now.. NH> Perhaps I need to create a "ocStbHostAVInterfaceTable.conf" file somewhere ... somehow? Exactly. And it will have the same syntax as snmpd.conf. You can copy or link your snmpd.conf file... - Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders - Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: snmpd.conf: (Warning: no access control information configured)
Ok, I got the ocStbHostAVInterfaceTable agent running now. The last step (based on the tutorial) is to run the following command to walk through each row in the table: snmpwalk -v1 localhost:1161 ocStbHostAVInterfaceTable .however, it does not like my syntax for this command once entered. The "snmpwalk" help screen is displayed which shows me all the options. Anyway. I still can not figure out why the syntax is wrong. Now, I believe the tutorial is based on 5.0 (or 5.2) and I am using NetSnmp5.4 now, so perhaps something has changed? Do you know what is wrong with my snmpwalk request? For summary, here are the commands I performed: 1) Create the following file: /export/home/myname/snmp/usr/local/share/snmp/ocStbHostAVInterfaceTable.conf 2) make -f ocStbHostAVInterfaceTable_Makefile 3) ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 4) snmpwalk -v1 localhost:1161 ocStbHostAVInterfaceTable (THIS FAILS) Need Help <[EMAIL PROTECTED]> wrote: Also, when I change a ".conf" file must I rnu "make install" again? I can not remember if I needed to rerun something once the snmpd.conf file (or any .conf file) changes so perhaps you can let me know? BTW: Thanks for the help Need Help <[EMAIL PROTECTED]> wrote: I am trying to learn this stuff from scratch by reading through the tutorial provided for the "ifTable" MIB table. No where does it mention I need to create a specific "ifTable.conf" file in order to run this. Ok, I will give it a go . I am assuming I place it in the same place as the "snmpd.conf" file is located? Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 17 May 2007 12:34:20 -0700 (PDT) Need wrote: NH> I guess I am confused about why it is complaining about a "ocStbHostAVInterfaceTable.conf" configuration file as well. I thought I was only dealing with a "snmpd.conf" configuration file only. But you aren't running snmpd... you are running a specialized application now.. NH> Perhaps I need to create a "ocStbHostAVInterfaceTable.conf" file somewhere ... somehow? Exactly. And it will have the same syntax as snmpd.conf. You can copy or link your snmpd.conf file... - Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders - Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders - Need Mail bonding? Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Help me understand this code snipet please
Yes, this code is in my container_load procedure and I do understand that I
need to define those fields myself. Now, the same problem occurs in the
ocStbHostAVInterfaceTable container_load procedure since it mirrors the ifTable
implementation in the tutorial.
Now, I attached the "data_access.c" module which has the container_load
procedure in it for you to see. I included a description of the problem for
you to read at the location in which in occurs. Search for the text "PROBLEM"
in the code and you will find it.It is very easy to find.
Now, keep in mind I am simply trying to learn SNMP, so the code you are about
to see is simply a hardcoded values used to populate this MIB table. My goal
is to finally be able to perform a "snmpwalk" through this table and smiply see
my hardcoded values.
Anyway, let me know what you think. it is not that hard to figure out at
all.
Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 17 May 2007 08:26:18 -0700
(PDT) Need wrote:
NH> In order to learn how to use NetSNMP I was reading through the MFD ifTable
tutorial. Part of the code generated for the "ifTable" table (when using the
"mib2c" command with the MFD configuration file) is the following:
NH>
NH> if ((rowreq_ctx->data.ifDescr == NULL) ||
NH> (rowreq_ctx->data.ifDescr_len < (ifDescr_len * sizeof(ifDescr[0] {
NH> snmp_log(LOG_ERR, "not enough space for value\n");
NH> return MFD_ERROR;
NH> }
NH> rowreq_ctx->data.ifDescr_len = ifDescr_len * sizeof(ifDescr[0]);
NH> memcpy(rowreq_ctx->data.ifDescr, ifDescr, ifDescr_len * sizeof(ifDescr[0]));
Unfortunately, because of the multitude of options available with the mfd
config, simply presenting this code snippet doesn't help. I either need the
source files, or the mfd configuration files ('default' directory). Without
those, I'm going to guess that this code is in your 'container_load' function.
NH> When runnnig this code I get the "not enough space for value" error being
produced. The reason why it fails is due to the length check which is being
performed (shown below):
NH>
NH> (rowreq_ctx->data.ifDescr_len < (ifDescr_len * sizeof(ifDescr[0])))
NH>
NH> It seems to me that this will always fail since the
"rowreq_ctx->data.ifDescr_len" variable does not get populated until "after"
the "If" check is performed (see code snipet above).
NH>
NH> Question:
NH> What am I missing? How can this check (which is generated for me
automatically using mib2c) actually ever work?
Remember, this code is a template, not a finished product. Note that the
initial code generated for container_load doesn't even define the variables
used in this snipped (ifDescr, ifDescr_len).
Anyways, in other places where this code is used, it is prefixed with
rowreq_ctx->data.ifDescr_len = sizeof(rowreq_ctx->data.ifDescr);
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ocStbHostAVInterfaceTable_data_access.c
Description: 1367737609-ocStbHostAVInterfaceTable_data_access.c
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Re: Help me understand this code snipet please
Thing is, the code I gave you was only my "test" code. My real implementation (once I am convinced I know what I am doing) is going to require me to populate the row context data (all the rows in the table) in the "row_prep" procedure and "not" in the "container_load" procedure anymore. This is because the data can change so I can not simply load it one time when the "container_load" procedure is called at the start. ** I guess I am assuming that the "container_load" procedure only gets called one time at the start, this is why the "row_prep" is provided . so values can be set into the table before the SNMP Get requests are processed. Is this correct? Anyway, I guess I was more interested in knowing why "mib2c" generates that type of code in which a variable (ie: "rowreq_ctx->data.ocStbHostAVInterfaceType_len") is used in a defensive check "before" the variable is actually set with the valid value. Just trying to make sense of the automatically generated code and I am trying to figure out why this would ever be used like this since this automatically generated code does not make sense to me as is ... Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 17 May 2007 13:44:41 -0700 (PDT) Need wrote: NH> Now, I attached the "data_access.c" module which has the container_load procedure in it for you to see. I included a description of the problem for you to read at the location in which in occurs. Search for the text "PROBLEM" in the code and you will find it.It is very easy to find. The solution you mention in the comments, removing the check, is fine in this case because you are initializing a new object with its value. - TV dinner still cooling? Check out "Tonight's Picks" on Yahoo! TV.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Help me understand this code snipet please
Then what is the purpose of the "row_prep" procedure ? Basically, when would i place code in the "row_prep" procedure? Dave Shield <[EMAIL PROTECTED]> wrote: On 18/05/07, Need Help wrote: > This is because the data can change so I can not simply load it > one time when the "container_load" procedure is called at the start. > ** I guess I am assuming that the "container_load" procedure only gets > called one time at the start Is this correct? No. The idea here is that the agent will hold a local cached copy of the table data, which it can use to handle incoming requests (rather than reloading the data afresh every time). This cache has a "timeout" associated with it. If a request arrives and the cache is too old (i.e. the age is greater than the timeout), then the 'container_load' routine will be called again to re-read an up-to-date version of the table data. That's certainly how the cache helper works in general. I'd be surprised if the MfD framework did something different. Dave - Get the Yahoo! toolbar and be alerted to new email wherever you're surfing. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: snmpd.conf: (Warning: no access control information configured)
I am performing the following three steps below (as recommended by the NetSnmp tutorial) to be able to test whether the changes I made to the "xxx_data_access.c" table file can be accessed via an "snmpwalk" request: 1) make -f ocStbHostAVInterfaceTable_Makefile 2) ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 3) snmpwalk -v1 -c public localhost:1161 ocStbHostAVInterfaceTable When I execute the "snmpwalk" command, it no longer has a problem with the syntax used (as was my original problem), but instead it now produces the following response after waiting two second or so: "Timeout: No Response from localhost:1161" Any idea why this timeout might be occurring? I am using "1161" because that is what was in the tutorial. Am I making a dumb mistake by simply using this "1161" value or should it work for me on my system? PS: I did verified that my specialized agent is running (see below) [EMAIL PROTECTED] ps -ef | grep localhost root 26895 7369 0 10:34 pts/13 00:00:00 ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 root 9186 7369 0 11:08 pts/13 00:00:00 grep localhost Dave Shield <[EMAIL PROTECTED]> wrote: On 17/05/07, Need Help wrote: > 4) snmpwalk -v1 localhost:1161 ocStbHostAVInterfaceTable (THIS FAILS) Try specifying a community string. Something like snmpwalk -v1 -c public localhost:1161 ocStbHostAVInterfaceTable Dave - Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: snmpd.conf: (Warning: no access control information configured)
I am performing the following three steps below (as recommended by the NetSnmp tutorial) to be able to test whether the changes I made to the "xxx_data_access.c" table file can be accessed via an "snmpwalk" request: 1) make -f ocStbHostAVInterfaceTable_Makefile 2) ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 3) snmpwalk -v1 -c public localhost:1161 ocStbHostAVInterfaceTable When I execute the "snmpwalk" command, it no longer has a problem with the syntax used (as was my original problem), but instead it now produces the following response after waiting two second or so: "Timeout: No Response from localhost:1161" Any idea why this timeout might be occurring? I am using "1161" because that is what was in the tutorial. Am I making a dumb mistake by simply using this "1161" value or should it work for me on my system? PS: I did verified that my specialized agent is running (see below) [EMAIL PROTECTED] ps -ef | grep localhost root 26895 7369 0 10:34 pts/13 00:00:00 ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 root 9186 7369 0 11:08 pts/13 00:00:00 grep localhost Dave Shield <[EMAIL PROTECTED]> wrote: On 17/05/07, Need Help wrote: > 4) snmpwalk -v1 localhost:1161 ocStbHostAVInterfaceTable (THIS FAILS) Try specifying a community string. Something like snmpwalk -v1 -c public localhost:1161 ocStbHostAVInterfaceTable Dave - Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: snmpd.conf: (Warning: no access control information configured)
ent1/snmp/usr/local/etc/snmp:/export/home/rosent1/snmp/usr/local/share/snmp:/export/home/rosent1/snmp/usr/local/lib/snmp:/root/.snmp (persistent path:/var/net-snmp) read_config: /export/home/rosent1/snmp/usr/local/etc/snmp/ocStbHostAVInterfaceTable.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/etc/snmp/ocStbHostAVInterfaceTable.local.conf: No such file or directory read_config: Reading configuration /export/home/rosent1/snmp/usr/local/share/snmp/ocStbHostAVInterfaceTable.conf read_config: /export/home/rosent1/snmp/usr/local/share/snmp/ocStbHostAVInterfaceTable.conf:31 examining: rocommunity mycommunity_ro read_config: Found a parser. Calling it: rocommunity / mycommunity_ro read_config: /export/home/rosent1/snmp/usr/local/share/snmp/ocStbHostAVInterfaceTable.local.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/lib/snmp/ocStbHostAVInterfaceTable.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/lib/snmp/ocStbHostAVInterfaceTable.local.conf: No such file or directory read_config: /root/.snmp/ocStbHostAVInterfaceTable.conf: No such file or directory read_config: /root/.snmp/ocStbHostAVInterfaceTable.local.conf: No such file or directory read_config: config path used for ocStbHostAVInterfaceTable:/var/net-snmp (persistent path:/var/net-snmp) read_config: /var/net-snmp/ocStbHostAVInterfaceTable.conf: No such file or directory read_config: /var/net-snmp/ocStbHostAVInterfaceTable.local.conf: No such file or directory read_config: config path used for agentx:/export/home/rosent1/snmp/usr/local/etc/snmp:/export/home/rosent1/snmp/usr/local/share/snmp:/export/home/rosent1/snmp/usr/local/lib/snmp:/root/.snmp (persistent path:/var/net-snmp) read_config: /export/home/rosent1/snmp/usr/local/etc/snmp/agentx.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/etc/snmp/agentx.local.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/share/snmp/agentx.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/share/snmp/agentx.local.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/lib/snmp/agentx.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/lib/snmp/agentx.local.conf: No such file or directory read_config: /root/.snmp/agentx.conf: No such file or directory read_config: /root/.snmp/agentx.local.conf: No such file or directory read_config: config path used for agentx:/var/net-snmp (persistent path:/var/net-snmp) read_config: /var/net-snmp/agentx.conf: No such file or directory read_config: /var/net-snmp/agentx.local.conf: No such file or directory read_config: config path used for snmp:/export/home/rosent1/snmp/usr/local/etc/snmp:/export/home/rosent1/snmp/usr/local/share/snmp:/export/home/rosent1/snmp/usr/local/lib/snmp:/root/.snmp (persistent path:/var/net-snmp) read_config: /export/home/rosent1/snmp/usr/local/etc/snmp/snmp.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/etc/snmp/snmp.local.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/share/snmp/snmp.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/share/snmp/snmp.local.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/lib/snmp/snmp.conf: No such file or directory read_config: /export/home/rosent1/snmp/usr/local/lib/snmp/snmp.local.conf: No such file or directory read_config: /root/.snmp/snmp.conf: No such file or directory read_config: /root/.snmp/snmp.local.conf: No such file or directory read_config: config path used for snmp:/var/net-snmp (persistent path:/var/net-snmp) read_config: /var/net-snmp/snmp.conf: No such file or directory read_config: /var/net-snmp/snmp.local.conf: No such file or directory Dave Shield <[EMAIL PROTECTED]> wrote: On 18/05/07, Need Help wrote: > When I execute the "snmpwalk" command, it no longer has a problem with the > syntax used (as was my original problem), but instead it now produces the > following response after waiting two second or so: > > "Timeout: No Response from localhost:1161" > > > Any idea why this timeout might be occurring? What is in the config file? If you're not sure which config file(s) are being read in, try adding "-Dread_config" when starting the agent. > I am using "1161" because > that is what was in the tutorial. Am I making a dumb mistake by simply > using this "1161" value or should it work for me on my system? That ought to work - as long as whatever you specify when starting the agent matches the destination in the snmpwalk command. Dave - Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Be
Is "make install" required after updating "snmpd.conf" or "snmp.conf" files?
If I update the "snmpd.conf" file (or "snmp.conf" file) then must I perform a "make install" (or perhaps any other command) before the changes take affect? - Luggage? GPS? Comic books? Check out fitting gifts for grads at Yahoo! Search.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: snmpd.conf: (Warning: no access control information configured)
I have no idea what the -M option does I was just following the tutorial. However, I tried your recommendation and got the following warning produced: Warning: Failed to connect to the agentx master agent ([NIL]) It seems it is trying to do something with an AgentX agent now. I do not think I want to involve an AgentX for my testing of the snmpwalk command. Magnus Fromreide <[EMAIL PROTECTED]> wrote: On fre, 2007-05-18 at 10:16 -0700, Need Help wrote: > The configuration file I created is located at the following location: > > /export/home/myname/snmp/usr/local/share/snmp/ocStbHostAVInterfaceTable.conf > > and has only one line in it as follows: > > rocommunity mycommunity_ro > > > I started the agent using the following: > > ./ocStbHostAVInterfaceTable -f -L -Dread_config -M localhost:1161 & Doesn't the -M argument tell your agent to use localhost and 1161 as directories to read mib files from? Does it work better if you try with ./ocStbHostAVInterfaceTable -f -Lf my.logfile -Dread_config localhost:1161 ? /MF - Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: snmpd.conf: (Warning: no access control information configured)
Yes, of course . Trying to learn NetSnmp, I was reading through the following tutorial: http://www.net-snmp.org/tutorial/tutorial-5/toolkit/mfd/if-mib/index.html This tutorial relates to the ifTable MIB and explains how to update the code accordingly with the goal of being able to perform an "snmpwalk" request at the end to verify all rows contain the data which has been inserted. There are about 5 or 6 sections to this tutorial, At the end of each section is a link to the next section. The last section, entitled "MFD: ifTable testing" explains how to do the following: 1) make the code 2) start the specialized agent for testing purposes 3) issue a snmpwalk command to verify populated table values. Anyway, I took this exact approach when writing my own code for my own "ocStbHostAVInterfaceTable" MIB table for the sole reason of trying to see if I could populate the table and perform a "snmpwalk" request. I have been reading nonstop for about 2 weeks about anything relating to NetSnmp. It is very hard to understand at first, but I believe I can now talk about NetSnmp enough to ask more specific questions when needed. I would love to perform a "snmpwalk", but can not since the snmpwalk command I entered always times out. Here are the commands I am entering as it relates to three tutorial steps stated above: 1) make -f ocStbHostAVInterfaceTable_Makefile 2) ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 3) snmpwalk -v1 -c public localhost:1161 ocStbHostAVInterfaceTable Note: Without the "-c public" option the snmpwalk command was not allowed to be entered. It resulted in the general "usage" error being displayed. Adding the "-c public" option results in the command being accepted, it just times out now, with the following error: Timeout: No Response from localhost:1161 Thanks for you time in helping me out. Dave Shield <[EMAIL PROTECTED]> wrote: On 18/05/07, Need Help wrote: > I have no idea what the -M option does I was just following the > tutorial. You keep talking about "the tutorial". It might be useful if you could be a bit more explicit about exactly which tutorial you are following. There are several different approaches documented in the project web pages - which specific page are you working with? Dave - Get your own web address. Have a HUGE year through Yahoo! Small Business.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: snmpd.conf: (Warning: no access control information configured)
This is the command I am executing to start my specialize agent (based on what the tutorial recommends): ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 The command line options for this agent are listed below. It seems the "-M" option is to indicate to use a standard agent instead of an AgentX agent ... which is what I want. usage: ocStbHostAVInterfaceTable [-D] [-f] [-L] [-M] [-H] [LISTENING ADDRESSES] -f Do not fork() from the calling shell. -DTOKEN[,TOKEN,...] Turn on debugging output for the given TOKEN(s). Without any tokens specified, it defaults to printing all the tokens (which is equivalent to the keyword 'ALL'). You might want to try ALL for extremely verbose output. Note: You can't put a space between the -D and the TOKENs. -H Display a list of configuration file directives understood by the agent and then exit. -M Run as a normal SNMP Agent instead of an AgentX sub-agent. -x ADDRESS connect to master agent at ADDRESS (default /var/agentx/master). -L Do not open a log file; print all messages to stderr. Need Help <[EMAIL PROTECTED]> wrote: I have no idea what the -M option does I was just following the tutorial. However, I tried your recommendation and got the following warning produced: Warning: Failed to connect to the agentx master agent ([NIL]) It seems it is trying to do something with an AgentX agent now. I do not think I want to involve an AgentX for my testing of the snmpwalk command. Magnus Fromreide <[EMAIL PROTECTED]> wrote: On fre, 2007-05-18 at 10:16 -0700, Need Help wrote: > The configuration file I created is located at the following location: > > /export/home/myname/snmp/usr/local/share/snmp/ocStbHostAVInterfaceTable.conf > > and has only one line in it as follows: > > rocommunity mycommunity_ro > > > I started the agent using the following: > > ./ocStbHostAVInterfaceTable -f -L -Dread_config -M localhost:1161 & Doesn't the -M argument tell your agent to use localhost and 1161 as directories to read mib files from? Does it work better if you try with ./ocStbHostAVInterfaceTable -f -Lf my.logfile -Dread_config localhost:1161 ? /MF - Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders - Looking for a deal? Find great prices on flights and hotels with Yahoo! FareChase.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: snmpd.conf: (Warning: no access control information configured)
I am not married to the idea of using the MFD approach. It was the one tutorial which tried to give a detailed explanation of how to insert the code required to make it happen. I have no idea what you mean by recommending I use a "standard Net-SNMP agent". What does this mean? Are there any other tutorials which will explain the other approaches which you refer to? If so, please provide some useful links. Thanks! Dave Shield <[EMAIL PROTECTED]> wrote: On 18/05/07, Need Help wrote: > Trying to learn NetSnmp, I was reading through the following tutorial: > > http://www.net-snmp.org/tutorial/tutorial-5/toolkit/mfd/if-mib/index.html > > This tutorial relates to the ifTable MIB Actually, this tutorial really relates to the MfD framework, using the ifTable as an example. This framework is only one of a number of possible mechanisms for implementing MIB modules. The style of code is very different to most of the other approaches (which I'm personally both more familiar and confortable with), so I think I'll leave Robert to assist you with this one. The one thing that I do wonder about is whether this tutorial includes the VACM modules which are normally responsible for access control. With a standard agent setup, if the VACM modules aren't present, then the agent wouldn't respond to any requests. I'm not knowledgeable enough about the MfD way of working to comment as to whether this is still the case here. But that would be my immediate suspicion. I'll now hand over to Robert to provide facts rather than speculation Alternatively, you might wish to consider using the standard Net-SNMP agent, rather than this stripped-down MIB-specific setup. Dave - Boardwalk for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: snmpd.conf: (Warning: no access control information configured)
Do you consider a "standard NetSNMP agent" to be the agent which is started when issuing the "snmpd" command and that you consider me to be using a "MIB-specific agent" because I am starting an agent by issuing the specific "ocStbHostAVInterfaceTable" command? If so, then I think me issuing the "ocStbHostAVInterfaceTable" command was simply a "tutorial-specific" recommendation to allow me to test that a snmpwalk request actually works on the data I populated. I always thought I would eventually be starting only one main "snmpd" agent and simply linking all the MIB I required into this agent. I am trying to figure out whether I am learning/implementnig NetSNMP in the correct manner or not or whether I must restart from scratch. Need Help <[EMAIL PROTECTED]> wrote: I am not married to the idea of using the MFD approach. It was the one tutorial which tried to give a detailed explanation of how to insert the code required to make it happen. I have no idea what you mean by recommending I use a "standard Net-SNMP agent". What does this mean? Are there any other tutorials which will explain the other approaches which you refer to? If so, please provide some useful links. Thanks! Dave Shield <[EMAIL PROTECTED]> wrote: On 18/05/07, Need Help wrote: > Trying to learn NetSnmp, I was reading through the following tutorial: > > http://www.net-snmp.org/tutorial/tutorial-5/toolkit/mfd/if-mib/index.html > > This tutorial relates to the ifTable MIB Actually, this tutorial really relates to the MfD framework, using the ifTable as an example. This framework is only one of a number of possible mechanisms for implementing MIB modules. The style of code is very different to most of the other approaches (which I'm personally both more familiar and confortable with), so I think I'll leave Robert to assist you with this one. The one thing that I do wonder about is whether this tutorial includes the VACM modules which are normally responsible for access control. With a standard agent setup, if the VACM modules aren't present, then the agent wouldn't respond to any requests. I'm not knowledgeable enough about the MfD way of working to comment as to whether this is still the case here. But that would be my immediate suspicion. I'll now hand over to Robert to provide facts rather than speculation Alternatively, you might wish to consider using the standard Net-SNMP agent, rather than this stripped-down MIB-specific setup. Dave - Boardwalk for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders Shape Yahoo! in your own image. Join our Network Research Panel today!http://us.rd.yahoo.com/evt=48517/*http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7 hot CTA = Join our Network Research Panel- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
YEAH ! (Re: snmpd.conf: (Warning: no access control information configured))
Ok, I am a bit excited since I figured out why the agent was timing out on me. Instead of using the "-c public" option as below: snmpwalk -v1 -c public localhost:1161 ocStbHostAVInterfaceTable I needed to use the correct community name I entered when configuring the agent: snmpwalk -v1 -c mycommunity_ro localhost:1161 ocStbHostAVInterfaceTable I am very excited to have reached this point. Need Help <[EMAIL PROTECTED]> wrote: Yes, of course . Trying to learn NetSnmp, I was reading through the following tutorial: http://www.net-snmp.org/tutorial/tutorial-5/toolkit/mfd/if-mib/index.html This tutorial relates to the ifTable MIB and explains how to update the code accordingly with the goal of being able to perform an "snmpwalk" request at the end to verify all rows contain the data which has been inserted. There are about 5 or 6 sections to this tutorial, At the end of each section is a link to the next section. The last section, entitled "MFD: ifTable testing" explains how to do the following: 1) make the code 2) start the specialized agent for testing purposes 3) issue a snmpwalk command to verify populated table values. Anyway, I took this exact approach when writing my own code for my own "ocStbHostAVInterfaceTable" MIB table for the sole reason of trying to see if I could populate the table and perform a "snmpwalk" request. I have been reading nonstop for about 2 weeks about anything relating to NetSnmp. It is very hard to understand at first, but I believe I can now talk about NetSnmp enough to ask more specific questions when needed. I would love to perform a "snmpwalk", but can not since the snmpwalk command I entered always times out. Here are the commands I am entering as it relates to three tutorial steps stated above: 1) make -f ocStbHostAVInterfaceTable_Makefile 2) ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 3) snmpwalk -v1 -c public localhost:1161 ocStbHostAVInterfaceTable Note: Without the "-c public" option the snmpwalk command was not allowed to be entered. It resulted in the general "usage" error being displayed. Adding the "-c public" option results in the command being accepted, it just times out now, with the following error: Timeout: No Response from localhost:1161 Thanks for you time in helping me out. Dave Shield <[EMAIL PROTECTED]> wrote: On 18/05/07, Need Help wrote: > I have no idea what the -M option does I was just following the > tutorial. You keep talking about "the tutorial". It might be useful if you could be a bit more explicit about exactly which tutorial you are following. There are several different approaches documented in the project web pages - which specific page are you working with? Dave - Get your own web address. Have a HUGE year through Yahoo! Small Business.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders Shape Yahoo! in your own image. Join our Network Research Panel today!http://us.rd.yahoo.com/evt=48517/*http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7 hot CTA = Join our Network Research Panel- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Can I use "snmpd" for code generated with "mib2c.mfd.conf"
I am very new to SNMP. I used "mib2c.mfd.conf" to generate the code for a table (ocStbHostAVInterfaceTable) which is defined within my MIB text file. I followed the NetSNMP "MFD:ifTable" tutorial (link below) to learn how to update the MFD code for my specific MIB table. http://www.net-snmp.org/tutorial/tutorial-5/toolkit/mfd/if-mib/ifTable/index.html I was able to complete the tutorial by successfully executing a "snmpwalk" through the rows of my table. It seemed this tutorial had me create a specialized agent (called ocStbHostAVInterfaceTable) which I could call directly (for testing purposes) to prove whether my table updates worked properly or not. Basically, I never had to start the "snmpd" agent at all during this tutorial. I would now like to generate code for the remaining tables/scalars located within my MIB text file and be able to run only "one" main agent to perform GET requests on the data within all these tables. I am assuming running the main NetSnmp agent should occur by executing the "snmpd" command only instead of having to create individual specialized agents for each of the tables/scalars defined in my MIB file (like the tutorial had me do). Questions: 1) Is it possible to have "one" agent running which can control all the tables definedin my MIB text file whose NetSNMP code was generated using "mib2c" with the "mib2c.mfd.conf" configuration file? If so, how do I execute the agent and get it to understand all of my defined MIBs? Do I add stuff to the "snmpd.conf" file perhaps? To test my current "ocStbHostAVInterfaceTable" I performed the following steps (as outlined in the tutorial stated above): a) make -f ocStbHostAVInterfaceTable_Makefile b) ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 & c) snmpwalk -v1 -c mycommunity_ro localhost:1161 ocStbHostAVInterfaceTable When I define other tables, I am assuming I would still need to execute the "make" command (a) for all tables I generate, but I am not sure I really want to execut (b) or (c) steps since I want to use "one" agent only. 2) What is the difference between a master agent and AgentX subagent and why do you need AgentX subagents? Maybe provide an example as why subAgents are used? 3) Is the "master agent" considered to be the agent which is started via the "snmpd" command? 4) I used the "mib2c.mfd.conf" configuration file to generate the code, I was wondering whether this code supports SNMPv3. I believe I will eventually need to learn how to incorporate some security settings and wanted to make sure this would be possible before continuing. 5) I am also wondering whether using the "mib2c.mfd.conf" configuration file was the correct choice for me as I move forward in implementing other tables defined in my MIB text file. I originally chose to use this configuration file because I was learning SNMP for the first time and the tutorial required it for me to learn how to insert code. Are there better choices of configuration files which I should be looking into or should I stick with the "mib2c.mfd.conf" configuration file for now. I still consider myself a "dummy" when it comes to SNMP and I am also new to Linux as well, but I wanted to make sure that all the functionailty of SNMP is possible if I use the "mib2c.mfd.conf" configuration file for generating my code. I do nto want to spend all my time learning the code generated by the "mib2c.mfd.conf" configuration file just to learn I should have used another configuration file months in the future. - Be a better Heartthrob. Get better relationship answers from someone who knows. Yahoo! Answers - Check it out. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
What is the difference between "snmp.conf" and "snmpd.conf"?
I believe the "snmpd.conf" file is used to read in settings when the agent is started ...correct? I have no idea what "snmp.conf" is used for . - Pinpoint customers who are looking for what you sell. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: What is the difference between "snmp.conf" and "snmpd.conf"?
I think I found the difference stated in the FAQ . thanks Need Help <[EMAIL PROTECTED]> wrote: I believe the "snmpd.conf" file is used to read in settings when the agent is started ...correct? I have no idea what "snmp.conf" is used for . - Pinpoint customers who are looking for what you sell. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders - Looking for earth-friendly autos? Browse Top Cars by "Green Rating" at Yahoo! Autos' Green Center. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
MIBS environment variable, --with-mibs and snmp.conf 'mibs' tag dont work
** using NetSnmp 5.4 I am trying to learn how to use the snmp.conf file to store some settings for my agent. Here is the "configure" command I am using for install: ./configure \ --prefix=/export/home/rosent1/snmp/usr/local \ --srcdir=/export/home/rosent1/snmp/net-snmp-5.4 \ --enable-embedded-perl \ --enable-shared \ --with-mib-modules="OC-STB-HOST-MIB" If I set the MIBS environment variable, then I can start the agent and execute a "snmpwalk" command and all the row information displays fine. I am trying to get the "snmpwalk" command to work without setting the MIBS environment variable to "ALL". I thought I could simply do any of the following three things to get my MIB loaded, but none of these things work: 1) Try setting the MIBS environment variable to append the specific MIB to load: export MIBS=+OC-STB-HOST-MIB 2) Try using the "--with-mibs=+OC-STB-HOST-MIB" option in the configure command 3) Add the following line into the "/export/home/rosent1/snmp/usr/local/share/snmp/snmp.conf" file: mibs +OC-STB-HOST-MIB Questions: 1) Why do none of these three alternative methods of loading a MIB file work? 2) If I set the MIBS environment variable to be "ALL" again, then everything works fine.What is going on? - Get the Yahoo! toolbar and be alerted to new email wherever you're surfing. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
How to change default MIB directory location?
I understand the default directory to look for MIB files is the following: /usr/local/share/snmp/mibs However, I would like to change this to another location. If I set the MIBDIRS environment variable as follows, then I can get it to find the MIB file in a new provided location: export MIBDIRS= +"/export/home/myname/snmp/usr/local/share/snmp/mibs" However, I do not want to use the environment variable to make this setting, so I tried the following two setups but nothing worked: a) I tried including the following option in the "configure" command: --with-mibdirs="/export/home/myname/snmp/usr/local/share/snmp/mibs" b) I tried setting the following in the "snmp.conf" file: mibdirs /export/home/myname/snmp/usr/local/share/snmp/mibs Question: Why does (a) and (b) not work for me? **NOTE: I am not using "snmpd" to start the agent, but rather I am starting a specialized agent called "ocStbHostAVInterfaceTable". Is this a problem ... or should two options above still work regardless? Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel and lay it on us.http://us.rd.yahoo.com/evt=48516/*http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7 hot CTA = Join Yahoo!'s user panel- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: How to change default MIB directory location?
I am currently using the mibs-for-dummies configuration to generate my NetSnmp code since I was told this configuration hides most of the NetSnmp internal processing from the user. As a result, I have not updated the code to call the "init_mib()" routine so I am not sure what that is. I would be more interested in knowing why the "--with-mibdirs" configure option does nto work and why adding the "mibdirs" line to the snmp.conf does not work either. Erik Earle <[EMAIL PROTECTED]> wrote: don't use init_mib() call add_mibdir() and then init_mib_internals() instead. This is what init_mib() actually does using the environment vars as args to add_mibdir(). look at the man page for mib_api for more info. Sucker-punch spam with award-winning protection. Try the free Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/features_spam.html Need Help <[EMAIL PROTECTED]> wrote: I understand the default directory to look for MIB files is the following: /usr/local/share/snmp/mibs However, I would like to change this to another location. If I set the MIBDIRS environment variable as follows, then I can get it to find the MIB file in a new provided location: export MIBDIRS= +"/export/home/myname/snmp/usr/local/share/snmp/mibs" However, I do not want to use the environment variable to make this setting, so I tried the following two setups but nothing worked: a) I tried including the following option in the "configure" command: --with-mibdirs="/export/home/myname/snmp/usr/local/share/snmp/mibs" b) I tried setting the following in the "snmp.conf" file: mibdirs /export/home/myname/snmp/usr/local/share/snmp/mibs Question: Why does (a) and (b) not work for me? **NOTE: I am not using "snmpd" to start the agent, but rather I am starting a specialized agent called "ocStbHostAVInterfaceTable". Is this a problem ... or should two options above still work regardless?Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel and lay it on us. http://us.rd.yahoo.com/evt=48516/*http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7 hot CTA = Join Yahoo!'s user panel - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders - Get the free Yahoo! toolbar and rest assured with the added security of spyware protection. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
MFD: Can "snmpd" control multiple MFD tables and scalars?
I need help in findnig out whether the "snmpd" command can control multiple tables and scalars which were generated with the MFD configuration file. Here is a summary of what I did: 1) I unpacked the NetSNMPv5.4 into the following directory: .../net-snmp-5.4/ 2) I created an "OC-STB-HOST-MIB" directory as follows (since this is MIB I am working with): .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ 3) I created subdirectories for each table and scalar located with the OC-STB-HOST-MIB file as follows: .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAVInterfaceTable-mib2c-orig/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostComponentVideoTable/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostDeviceSoftwareBase/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostDVIHDMITable/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostEasObjects/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostHWIdentifiers/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostIEEE1394ConnectedDevicesTable/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostIEEE1394Table/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostInBandTunerTable/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostMpeg2ContentTable/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostPower/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostProgramStatusTable/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostRFChannelOutTable/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostSecuritySubSystem/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostSoftwareDownloadStatus/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostSPDIfTable/ .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostUserSettings/ 4) I went into each table and scalar subdirectory and generated code using the "mib2c" command with the "mib2c.mfd.conf" configuration file (because I am a MIB dummy) . 5) I updated the code to populate the rows and table/scalar values. Questions: a) How do I compile the code located in the subdirectories for each table and scalar? Do I simply go into each table and scalar subdirectory and execute the "make -f _Makefile" command individually or is there a way to compile all tables and scalar code together for the "OC-STB-HOST-MIB" MIB at one time? b) I am assuming I should use the "/usr/local/sbin/snmpd" command to start the agent so I can then perform some GET requests to test the code I inserted, but I am not sure if this is correct. Perhaps I run "individual" agents for each table/scalar or is there only "one" agent I need to start which will somehow control all GET requests for all my tables/scalars? What do I need to do? If I should only start one agent (ie: snmpd), then how do I go about doing this? Extra (unrelated) question: c) I am using "mib2c.mfd.conf" configuration files to generate code. Does the code generated have the VACM packages incldued with it? I mean am I able to use the security settings provided by SNMPv3 even though I decided to use the MFD configuration file? I was told the VACM but not be incorporated into the MFD package. - Yahoo! oneSearch: Finally, mobile search that gives answers, not web links. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: MFD: Can "snmpd" control multiple MFD tables and scalars?
Is there an advantage between generating the code (using mib2c) for "all" Tables at once and generating code for each Table individually? I mean if I spent the extra time and generated the code for each Table (and scalars) individually (one at a time), then should I reach the same results? I mean will the code eb generated the exact same way or would I be missing some functionality which would be required which relates all the Tables/Scalars together as one unit? Now, I originally generated the code for each Table one at a time, but I found it did not generate the required .h files for each new Table. For example: I went into the ".../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/" directory and issued the mib2c command for the particular "ocStbHostAVInterfaceTable" node and the code was generated into this directory for me. I tried testing with only this newly generated code and eventually was successful in getting the "ocStbHostAVInterfaceTable" data to be displayed by performing an "snmpwalk" command. ** However, during my testing I noticed the following files were "not" generated for me automatically and I had to create them: 1) .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB.h 2) .../net-snmp-5.4/agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAVInterfaceTable.h Here are the file contents in case you are wondering what I did: OC-STB-HOST-MIB.h /* * module to include the modules */ config_require(OC-STB-HOST-MIB/ocStbHostAVInterfaceTable); config_add_mib(OC-STB-HOST-MIB) ocStbHostAVInterfaceTable.h /* * module to include the modules */ config_require(OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/ocStbHostAVInterfaceTable) *** Keep in mind I only generated code using mib2c for the "ocStbHostAVInterfaceTable" only for my testing. I would think I would need to update these files when I include more tables. I also thought these were the ".h" files which might have been created for me automatically. Seems weird I would have to create these two ".h" files myself. These files seem to link all the new directories together, so they seemed to be required to allow my testing to proceeed. Anyway, this is what got me wondering whether there was a way to generate all tables together in which these ".h" files might be created for me and so all Tables would be related together automatically. PS: Now, I did try to generate all tables automatically, based on your recommendation, but it did not work. It only generated code for one Table only. Not sure if I am doing something wrong, but I did try a few different high-level nodes to use in the mib2c command. Anyway, this failure led me to send this email asking whether there was a difference between generating table code individual or all at once . does it real matter which way the code is generated? Dave Shield <[EMAIL PROTECTED]> wrote: On 23/05/07, Need Help wrote: > 3) I created subdirectories for each table and scalar located with the > OC-STB-HOST-MIB file as follows: [snip] > 4) I went into each table and scalar subdirectory and generated code using > the "mib2c" command with the "mib2c.mfd.conf" configuration file Robert's the expert on this framework, but I believe you should be able to generate code for all the tables in one go. Try running "mib2c -c mib2c.mfd.conf ocStbHostRoot" (where 'ocStbHostRoot' is the parent node of all the tables). That ought to generate code for each of the tables, plus a header file "ocStbHostRoot.h" to link them all together. Compiling this into the main agent is then just a matter of copying this tree into the 'agent/mibgroup' subdirectory of the source tree, and running configure --with-mib-modules=ocStbHostRoot Robert - feel free to correct any inaccuracies in the above. Dave Choose the right car based on your needs. Check out Yahoo! Autos new Car Finder tool.http://us.rd.yahoo.com/evt=48518/*http://autos.yahoo.com/carfinder/;_ylc=X3oDMTE3NWsyMDd2BF9TAzk3MTA3MDc2BHNlYwNtYWlsdGFncwRzbGsDY2FyLWZpbmRlcg-- hot CTA = Yahoo! Autos new Car Finder tool- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Should the "make" command compile my new MIB Table code for me?
I created the following new MIB directory: .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/ and generated the required code using the mib2c command. All of the generated code is inside this new directory. I updated the code and confirmed it compiles using the local "ocStbHostAVInterface_Makefile" (which was generated by the mib2c command). After doing this, I deleted all the ".o" files since I wanted to compile everything using the main "configure" command now just for fun (ie: learning experience). After I ran the "configure" command and then performed the "make" command, I would have assumed this "make" command would have generated all of the ".o" files again and would have placed them in the above mentioned directory. However, the "make" command returned the following error: mibgroup/ocStbHostAVInterfaceTable/ocStbHostAVInterfaceTable.o: No such file Any idea why this is being produced? I know I can generate the ".o" files by running the "ocStbHostAVInterface_Makefile" supplied by the mib2c command but it does not make sense that I would need to generate all the ".o" files for each table individually using each individual Makefile command . right? Let me know what I am doing wrong, or at least what I am not understanding ... thanks. - Pinpoint customers who are looking for what you sell. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Should the "make" command compile my new MIB Table code for me?
Worked like a charm . thanks Wes Hardaker <[EMAIL PROTECTED]> wrote: >>>>> "NH" == Need Help writes: NH> After doing this, I deleted all the ".o" files since I wanted to NH> compile everything using the main "configure" command now just for NH> fun (ie: learning experience). Did you delete the *.lo files too? If they exist, you need to remove them too... -- Wes Hardaker Sparta, Inc. - Be a PS3 game guru. Get your game face on with the latest PS3 news and previews at Yahoo! Games.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Can the SNMPv3 security protocol be used if I am using the MFD configuration files?
I am using "mib2c.mfd.conf" configuration files to generate code. Will I be able to incorporate SNMPv3 functionality in the code if I want to? I was told that the VACM might not be incorporated into the MFD packages so it might not be able to be used easily. There is a good chance I am going to require SNMPv3 settings in the future so I would like to confirm I am not going to run into any problems in the future as a result of me using the mibs-for-dummies (MfD) configruation files now. I guess I am wondering whether I should be using any other configuration file type to generate my code (using mib2c) to allow me to use SNMPv3 functionality. Please let me know if using the MfD configuration files are fine or not. Thanks - Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: How to change default MIB directory location?
ig: Reading configuration /export/home/myname/snmp/usr/local/share/snmp/snmp.conf read_config: /export/home/myname/snmp/usr/local/share/snmp/snmp.conf:30 examining: mibdirs +/export/home/myname/snmp/usr/local/share/snmp/mibs read_config: /export/home/myname/snmp/usr/local/share/snmp/snmp.conf:37 examining: mibs +OC-STB-HOST-MIB:DOCS-IF-MIB:CLAB-DEF-MIB:DOCS-IETF-BPI2-MIB read_config: /export/home/myname/snmp/usr/local/share/snmp/snmp.local.conf: No such file or directory read_config: /export/home/myname/snmp/usr/local/lib/snmp/snmp.conf: No such file or directory read_config: /export/home/myname/snmp/usr/local/lib/snmp/snmp.local.conf: No such file or directory read_config: /root/.snmp/snmp.conf: No such file or directory read_config: /root/.snmp/snmp.local.conf: No such file or directory read_config: config path used for snmp:/var/net-snmp (persistent path:/var/net-snmp) read_config: /var/net-snmp/snmp.conf: No such file or directory read_config: /var/net-snmp/snmp.local.conf: No such file or directory read_config: storing: # # net-snmp (or ucd-snmp) persistent data file. # # STOP STOP STOP STOP STOP STOP STOP STOP STOP # # DO NOT EDIT THIS FILE # # STOP STOP STOP STOP STOP STOP STOP STOP STOP # # DO NOT STORE CONFIGURATION ENTRIES HERE. # Please save normal configuration tokens for snmpd in SNMPCONFPATH/snmpd.conf. # Only "createUser" tokens should be placed here by snmpd administrators. # (Did I mention: do not edit this file?) # read_config: storing: setserialno 316065958 read_config: storing: ## read_config: storing: # # snmpNotifyFilterTable persistent data # read_config: storing: ## read_config: storing: read_config: storing: ## read_config: storing: # # ifXTable persistent data # read_config: storing: ifXTable .1 14:0 18:0x $ read_config: storing: ifXTable .2 14:0 18:0x $ read_config: storing: ifXTable .3 14:0 18:0x $ read_config: storing: ifXTable .4 14:0 18:0x $ read_config: storing: ## read_config: storing: read_config: storing: engineBoots 1 read_config: storing: oldEngineID 0x80001f88807036f77a67cf5546 NET-SNMP version 5.4 Wes Hardaker <[EMAIL PROTECTED]> wrote: >>>>> "NH" == Need Help writes: NH> I would be more interested in knowing why the "--with-mibdirs" NH> configure option does nto work and why adding the "mibdirs" line NH> to the snmp.conf does not work either. Both should work. I'm not sure what the problem with the --with-mibdirs flag, as it should work (but to be honest, I'm not sure the last time it was tested). For the snmp.conf file, make sure that it's being read. Run the agent or app with -Dread_config to make sure it's being read. -- Wes Hardaker Sparta, Inc. - Park yourself in front of a world of choices in alternative vehicles. Visit the Yahoo! Auto Green Center.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
RE: Should the "make" command compile my new MIB Table code for me?
Do these commands automatically go through all subdirectories located within the "/agent/mibgroup/" directory and remove all the ".o" files and ".lo" files for me? I know I heard of these commands before, but I can not remember where I read about them, so I am not sure what they really mean. It is hard trying to learn SNMP and remember where I saw everything .. so would it be possible to explain to me the difference between these two commands please? BTW: Thanks for the help everyone Bruce Shaw <[EMAIL PROTECTED]> wrote: "make clean" or "make distclean" is your friend. >>>>> "NH" == Need Help writes: NH> After doing this, I deleted all the ".o" files since I wanted to NH> compile everything using the main "configure" command now just for NH> fun (ie: learning experience). This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel and lay it on us.http://us.rd.yahoo.com/evt=48516/*http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7 hot CTA = Join Yahoo!'s user panel- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can the SNMPv3 security protocol be used if I am using the MFD configuration files?
Ahh I understand now . I was only using the standalone specialized agent which comes with the MfD stuff for testing purposes only. I always intended to use the main "snmpd" master agent for my true execution of NetSNMP, so I guess I have no worries then. Thanks for clarifying this for me. Dave Shield <[EMAIL PROTECTED]> wrote: On 24/05/07, Need Help wrote: > I am using "mib2c.mfd.conf" configuration files to generate code. Will I > be able to incorporate SNMPv3 functionality in the code if I want to? Yes. The "mib2c" tool is primarily used to generate the code for a particular MIB module. This is completely independent of the access control mechanisms used by the agent. You should be able to use MIB modules generated by mib2c (using *any* of the mib2c frameworks), together with *any* version of SNMP. > I was told that the VACM might not be incorporated into the MFD > packages so it might not be able to be used easily. MIB modules and the overall agent framework are two completely separate things. A MIB module (MfD or otherwise) can be compiled into the main Net-SNMP agent code, with no problems whatsoever. A MIB module (MfD or otherwise) can be compiled as an AgentX subagent, and used with the main Net-SNMP master agent, with no problems whatsoever. The MfD framework (and this framework *only*) also has the concept of running the MIB module as a standalone agent, wrapped within a minimal SNMP agent driver. It is unclear to me how much this particular mode of operation reflects the "normal" agent behaviour, and I'd rather not comment on this. I don't always trust myself to give an objective view of the MfD framework - and it's probably safer to let Robert offer his thoughts on that. (He's no more objective than I am, but his bias is rather more positive than mine!) > There is a good chance I am going to require SNMPv3 settings in the future > so I would like to confirm I am not going to run into any problems in the > future as a result of me using the mibs-for-dummies (MfD) configruation > files now. No - you should not have any probloems whatsoever - certainly if you include your MIB module within the main Net-SNMP agent, or run it as an AgentX subagent. I make no guarantees about running this using the MfD-specific standalone agent approach. > I guess I am wondering whether I should be using any other > configuration file type to generate my code (using mib2c) to allow me to use > SNMPv3 functionality. > > Please let me know if using the MfD configuration files are fine or not. They're fine. I don't like them, but they're fine. Dave - Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
AgentX subagents (why are they needed)?
I believe it is possible to have multiple agents running at one time, where one is the "master" and the others are AgentX subagents. I am not quite sure why people use multiple agents, so perhaps someone can give me an example as to when multiple agents would be nice to use. Now, if I wanted to use multiple agents, then I understand I would need to place the "master agentx" line into the "snmpd.conf" file to indicate the "snmpd" agent is the "master" agent when it starts, however, I am not too sure how one would define and start AgentX subagents. If I wanted to define an AgentX subagent as well as a master agent, what would i need to do and how would I start both of them at the same time? I understand the AgentX subagents need to be defined with the master agent's address so the AgentX subagent can register with the master when it is started. I also understand that the master agent handles all the routing of the SNMP requests to the appropriate subagents automatically (which is nice). I just do not understand why subagents are required and how to start/configure them up if I wanted to use one. Again, I am trying to learn as much as I can so I can configure NetSNMP for my company, so I want to make sure I am going about this in the best way possible knwoing that I am new to all of the NetSNMP stuff. PS: Are "AgentX subagents" and "subagents" the same thing or are there different kinds of "subagents" allowed? - Bored stiff? Loosen up... Download and play hundreds of games for free on Yahoo! Games.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: How to change default MIB directory location?
Yes, I was using the wrong "snmpwalk" command. Your recommendation worked like a charm ... thanks. Dave Shield <[EMAIL PROTECTED]> wrote: On 24/05/07, Need Help wrote: > /export/home/myname/snmp/usr/local/sbin/snmpd -f -L > -Dread_config -M localhost & > > Based on the "-Dread_config" data displayed when the agent started > up, it looks like the "snmp.conf" file (as well as the other snmpd.conf > file) is being found and read correctly. by the agent > However, when I try to perform the > "snmpwalk", it produces the following error: > > ocStbHostAVInterfaceTable: Unknown Object Identifier Have you checked whether the *snmpwalk* command is reading your snmp.conf file? Try giving "snmpwalk" the same -D flag. If that does indicate that your snmp.conf file is being processed, then try running it with "-Dparse-mibs", to check which MIB files are being read in (and from where). But I suspect that you may well be using a vendor-supplied version of snmpwalk, which won't be looking in your private locations. I strongly suspect that running /export/home/myname/snmp/usr/local/bin/snmpwalk (instead of just "snmpwalk") might well work as expected. Dave - Choose the right car based on your needs. Check out Yahoo! Autos new Car Finder tool.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Should these ".h" files be generated for me?
I created the ".../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/" directory, issued the "mib2c" command in this directory for the "ocStbHostAVInterfaceTable" OID node and the code was generated for me and placed into this directory. I discovered the reason why my original testing via "snmpwalk" did not work was because the following files did not exist: 1) .../agent/mibgroup/OC-STB-HOST-MIB.h 2) .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAVInterfaceTable.h These files seem to link the new directory structures together and seem to be required for testing to proceeed. After I created these files manually, then the "snmpwalk" command worked fine. Here are the file contents: OC-STB-HOST-MIB.h /* * module to include the modules */ config_require(OC-STB-HOST-MIB/ocStbHostAVInterfaceTable); config_add_mib(OC-STB-HOST-MIB) ocStbHostAVInterfaceTable.h /* * module to include the modules */ config_require(OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/ocStbHostAVInterfaceTable) Question: 1) It seems odd I would have to create these two ".h" files myself manually to begin testing since these files seem to link all the new directories together to allow testing to proceeed. Is it a requirement the user create these files manually or should these files actually be generated automatically for me somehow, thus I am doing something wrong during the "mib2c" execution? - Got a little couch potato? Check out fun summer activities for kids.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: AgentX subagents (why are they needed)?
I would assume I would need to start both agents now by first starting the master agent via the "snmpd" command and then by starting the subagent via the "mysubagent" command . correct? I will read the link you provided thanks Dave Shield <[EMAIL PROTECTED]> wrote: AgentX subgents are not "needed", but they can be "useful" On 25/05/07, Need Help wrote: > I believe it is possible to have multiple agents running at one time, where > one is the "master" and the others are AgentX subagents. I am not quite > sure why people use multiple agents, so perhaps someone can give me an > example as to when multiple agents would be nice to use. Two scenarios: a) You have a vendor-supplied master SNMP agent (but no source) and want to add a new MIB module. AgentX allows you to implement this module in a separate AgentX subagent, and register with the master agent, without having to change the master agent at all. b) You have a MIB module that is specific to a particular piece of software (e.g. a web server MIB). AgentX allows you to implement this module within the software itself (where you might have easy access to internal data), and register with the master agent, without needing to include all of the other SNMP-related stuff within the application. > Now, if I wanted to use multiple agents, then I understand I would need to > place the "master agentx" line into the "snmpd.conf" file to indicate the > "snmpd" agent is the "master" agent when it starts The "snmpd" agent is the master agent automatically. The purpose of the "master agentx" directive is really to activate the AgentX functionality, and start listening for subagent connections. >, however, I am not too sure how one would define and start AgentX subagents. a) Compile your MIB module into the main agent framework, and then start "snmpd" using the command-line option '-X' b) Compile your MIB module using net-snmp-config --compile-subagent mysubagent myModule.c (See http://www.net-snmp.org/wiki/index.php/TUT:Writing_a_Subagent) c) Compile your MfD MIB module using the MfD makefile Dave - Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Can I put LD_LIBRARY_PATH into a "conf" file?
I needed to set the LD_LIBRARY_PATH to the following so the ".so" library files could be found: /export/home/myname/snmp/usr/local/lib I am wondering whether it is possibel to indicate this path inside of a "snmpd.conf" or "snmp.conf" file somehow? - Pinpoint customers who are looking for what you sell. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can I put LD_LIBRARY_PATH into a "conf" file?
I already include the following --prefix when performing the "configure" command: --prefix=/export/home/myname/snmp/usr/local however, this does not allow for the ".so" library files to be found in the following directory: /export/home/myname/snmp/usr/local/lib/ Magnus Fromreide <[EMAIL PROTECTED]> wrote: On fre, 2007-05-25 at 22:25 +0200, Thomas Anders wrote: > Need Help wrote: > > I needed to set the LD_LIBRARY_PATH to the following so the ".so" library > > files could be found: > > > > /export/home/myname/snmp/usr/local/lib > > > > I am wondering whether it is possibel to indicate this path inside of a > > "snmpd.conf" or "snmp.conf" file somehow? > > Impossible. snmp[d].conf are read by the agent and you need > LD_LIBRARY_PATH to even run it! Rather, put it in a shell script that > starts your agent. Consult your favorite system administrator for > further advice. Another thing Need Help could try is to give a correct --prefix argument when he builds net-snmp. That should add the necessary magic to the binaries to make them look in the right place at runtime. % readelf -d /tmp/net-snmp-install/bin/snmpwalk Dynamic section at offset 0x1d78 contains 23 entries: TagType Name/Value 0x0001 (NEEDED) Shared library: [libnetsnmp.so.20] 0x0001 (NEEDED) Shared library: [libcrypto.so.0.9.8] 0x0001 (NEEDED) Shared library: [libc.so.6] 0x000f (RPATH) Library rpath: [/tmp/net-snmp-install/lib] This isn't what he asked for but I think it is what he wish to do. /MF - Boardwalk for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can two MIB Tables be related and be required to share the same row index?
Thanks for the explanation . although I have some more questions. Table1 is the "main table" while Table2 is a "sparse" table. Table2 can be thought of as providing additional column information to extend Table1 and Table2 is indexed by the same table index defined by Table1. What would be the best way to store this information within NetSNMP? Currently, I am using the "mib2c.mfd.conf" configuration file to generate code using mib2c. For each row defined in "Table1", I allocate a new row_context in NetSNMP and store the data (ie: column data) in that row index. Since "Table2" is an extension of Table1, then it does not seem like I should be allocating new row_contexts for all the rows Table2 fields. It seems like I should be store Table2 field data into the "existing" row contexts defined by Table1 . is this correct? If this is correct, then how is this possible within NetSNMP? How can I obtain an existing row_context allocated when processing Table1 and expand it to store the additional data defined in Table2? Perhaps I need to use a different configuration file to generate code via mib2c? Also, knowing that Table1 and Table2 are defined separately, but are related, then should the "snmpwalk" command display all data defined in Table1 and Table2 at the same time by issuing only one "snmpwalk" command .. or should an "snmpwalk" command be issued for Table1 and then again for Table2 separately? Dave Shield <[EMAIL PROTECTED]> wrote: On 25/05/07, Need Help wrote: > 1) I noticed Table2 does "not" have an "ocStbHost1394Index" field defined. > I was wondering why Table2 did not have an "Index" field like Table1 had > defined? I assumed all Tables would have an "Index" field which would > represent the row index used for storage by NetSNMP. What am I not > understanding here? > > 2) To make me more confused, I looked into the "OC-STB-HOST-MIB" MIB file at > the definition of Table2 and saw that the definition of Table2 includes the > "ocStbHostAVInterfaceIndex" field (which is a field defined by Table1). How > can Table2 reference a Table1 field? These are basically both the same question. Table1 is a "normal" table - consisting of assorted column objects, and indexed by a single integer value, which is one of these column objects. This is the normal approach to defining a self-contained table. It exists on its own, with no dependency on any other part of the MIB. Table is not a "normal", self-contained table. In fact, it's perhaps best thought of as not being a separate table at all. Instead, think of these two as forming a single (combined) table, that just happens to be defined in two chunks: | Row 1 | | Row 1 (ctd) | | Row 2 | | Row 2 (ctd) | | Row 3 | | Row 3 (ctd) | (Table 1) (Table 2) The same index value is used for both tables, becase this identifies a single (combined) row. There are two main reasons for adopting this style of indexing. The first is when one table monitors the "core" behaviour, and the second monitors some (optional) extension. For example, the Host Resources MIB includes a pair of tables to monitor the processes running on a given system. One table (hrSWRunTable) contains the basic information about the process (name, arguments, PID, etc). This is typically fixed for a given process, and tends not to change during the lifetime of that process. The other (hrSWRunPerfTable) contains performance information (memory and CPU usage). This refers to exactly the same processes, so uses the same index values. But this is harder to implement (because it is much more likely to change), and may not be needed. So it's defined as a separate (optional) table, extending the first. The second reason for such an approach is where the first table is fairly general, and the second more specific, monitoring a subset of the first. Again, there's an example of this in the Host Resources MIB. This includes one table (hrDeviceTable), containing information about all the hardware contained in that system (CPUs, network cards, disks, printers, etc). This is indexed by a single integer index (hrDeviceIndex). But the MIB also includes a series of hardware-specific tables, concerned with particular types of device. Now the table for monitoring CPUs doesn't make sense when applied to a network interface device (or vice versa). So the hrProcTable will only contain rows for CPU devices, and the hrNetworkTable will only contain rows for network interfaces. But the same index is used for all of them. This is known as a "sparse" table: | Device 1 (cpu) | | CPU 1| . | Device 2 (cpu)
Re: Can I put LD_LIBRARY_PATH into a "conf" file?
No I have not. Is "ldconfig" a NetSnmp command? I will look into this and see what it is. I do not have a Linux background, so thanks for any help you provide. Dave Shield <[EMAIL PROTECTED]> wrote: On 30/05/07, Need Help wrote: > I already include the following --prefix when performing the "configure" > command: > > --prefix=/export/home/myname/snmp/usr/local > > ... however, this does not allow for the ".so" library files to be found in > the following directory: > >/export/home/myname/snmp/usr/local/lib/ Have you tried running "ldconfig /export/home/myname/snmp/usr/local/lib/" to update the linker cache information? Dave - Get the free Yahoo! toolbar and rest assured with the added security of spyware protection. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can I put LD_LIBRARY_PATH into a "conf" file?
Ok, it is a Unix command . I will give it a try thanks Need Help <[EMAIL PROTECTED]> wrote: No I have not. Is "ldconfig" a NetSnmp command? I will look into this and see what it is. I do not have a Linux background, so thanks for any help you provide. Dave Shield <[EMAIL PROTECTED]> wrote: On 30/05/07, Need Help wrote: > I already include the following --prefix when performing the "configure" > command: > > --prefix=/export/home/myname/snmp/usr/local > > ... however, this does not allow for the ".so" library files to be found in > the following directory: > >/export/home/myname/snmp/usr/local/lib/ Have you tried running "ldconfig /export/home/myname/snmp/usr/local/lib/" to update the linker cache information? Dave - Get the free Yahoo! toolbar and rest assured with the added security of spyware protection. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders - Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can two MIB Tables be related and be required to share the same row index?
Well, it seems there are actually about six "sparse" tables in my MIB which are extensions of Table1, so I will need to look into this a bit more to figure out how to approach this correctly. Now, it would be great to hear from Robert on this issue since he is familiar with the MfD configuration, but in the meantime, perhaps you could recommend another configuration file in which you are familiar which would provide me the base to make the changes you are recommending. The only reason why I chose the MfD configuration is because this was the only one which came with a complete tutorial explaining how the code functioned as well as which area of the code was required to be updated. If there is another widely used configuration file then I would like to play around with that one as well to get a better feeling of different kinds of approaches which can be used in NetSNMP. If you do recommend another configuration file, perhaps you could give a one paragraph description indicating which procedures need to be updated to perform certain functions. Dave Shield <[EMAIL PROTECTED]> wrote: On 30/05/07, Need Help wrote: > Table1 is the "main table" while Table2 is a "sparse" table. Table2 can be > thought of as providing additional column information to extend Table1 and > Table2 is indexed by the same table index defined by Table1. > > What would be the best way to store this information within NetSNMP? I wouldn't want to claim that this necessarily the "best" way, but there two approaches spring to mind. Which one I'd choose would depend on how sparse the second table was (and the size/overheads of the two tables). The first approach would be to have a single data structure to represent the combined row - containing fields for the column objects from both tables, and a flag or similar mechanism to indicate whether this particular row was valid in the second table. The same internal representation could then be used for both tables, with the table-specific code selecting the appropriate fields from the common row structure. This involves some overheads - both unused fields in the data structure for the sparse rows, and additional processing to skip these "gaps" in the second table. But it's probably the simpler concept. The other approach is to have two separate representations for the two tables, with distinct per-row data strucutes. So as far as the agent is concerned, they are effectively two completely independent tables. But the two tables would share a common "load" routine, which would populate both tables at the same time (from the same underlying data). That's actually sufficient to report a consistent view of the two tables. > Currently, I am using the "mib2c.mfd.conf" configuration file to generate > code using mib2c. I have no idea how this would be implemented in the MfD framework. I'll leave it to Robert to provide specific advice on that mechanism. > Also, knowing that Table1 and Table2 are defined separately, but are > related, then should the "snmpwalk" command display all data defined in > Table1 and Table2 at the same time by issuing only one "snmpwalk" command > .. or should an "snmpwalk" command be issued for Table1 and then again > for Table2 separately? That up to the person issuing the command. The snmpwalk command doesn't actually know anything about the structure of the individual tables - let alone that they are linked. Snmpwalk simply does a repeated GETNEXT until it runs off the end of the requested subtree. If you issue "snmpwalk Table1; snmpwalk Table2", then this will walk the two table individually. If you issue "snmpwalk myGroup', then this will walk the subtree rooted at "myGroup", including both tables (plus anything else in that subtree). But snmpwalk doesn't care either way. Dave - Looking for a deal? Find great prices on flights and hotels with Yahoo! FareChase.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can two MIB Tables be related and be required to share the same row index?
My plan is to integrate NetSNMP into my company's main build load. I will implement procedures to gather the correct MIB information within my company's software, then the NetSNMP code (generated by mib2c) will be updated to call these new procedures to get the data information which will then be used populate the Table structures within NetSNMP. I am assuming this is what you meant by "data taken from an underlying subsystem" . correct? I will generate code using the "mib2c.table_data.conf" file and have a look at it. Does this configuration allow for caching? Does the -Scache option turn on caching? I will look. Dave Shield <[EMAIL PROTECTED]> wrote: On 30/05/07, Need Help wrote: > If there is another widely used configuration file then I would like to play > around with that one as well to get a better feeling of different kinds of > approaches which can be used in NetSNMP. I'd tend to prefer the 'mib2c.table_data.conf' framework. If the MIB is monitoring data taken from an underlying subsystem, then you'd probably want to invoke this as mib2c -c mib2c.table_data.conf -Scache=1 myTable to include the 'load()' routine. This is where you'd read in the current contents of the table from this underlying system. > If you do recommend another configuration file, perhaps you could give a one > paragraph description indicating which procedures need to be updated to > perform certain functions. The main code to look at would be the load() routine. That's the main interface between the MIB module and the underlying system, so is the one place where we can't really provide automatically generated code. The initial contents are simply a basic example, to give you the general idea. You'd also need to check that the per-row data structure is suitable for your needs, and that the GET handling is correct (especially for string-based variables). It's difficult to be more specific, without knowing more details about your tables and the information that they are monitoring. Dave - Need a vacation? Get great deals to amazing places on Yahoo! Travel. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can two MIB Tables be related and be required to share the same row index?
I tried your recommendation, but got the following error message: # mib2c -c mib2c.table_data.conf -Scache=1 ocStbHostAVInterfaceTable no variable specified for -S flag. at /usr/local/bin/mib2c line 96. Is there something I am missing? I am using NetSnmp-v5.4 Dave Shield <[EMAIL PROTECTED]> wrote: On 30/05/07, Need Help wrote: > If there is another widely used configuration file then I would like to play > around with that one as well to get a better feeling of different kinds of > approaches which can be used in NetSNMP. I'd tend to prefer the 'mib2c.table_data.conf' framework. If the MIB is monitoring data taken from an underlying subsystem, then you'd probably want to invoke this as mib2c -c mib2c.table_data.conf -Scache=1 myTable to include the 'load()' routine. This is where you'd read in the current contents of the table from this underlying system. > If you do recommend another configuration file, perhaps you could give a one > paragraph description indicating which procedures need to be updated to > perform certain functions. The main code to look at would be the load() routine. That's the main interface between the MIB module and the underlying system, so is the one place where we can't really provide automatically generated code. The initial contents are simply a basic example, to give you the general idea. You'd also need to check that the per-row data structure is suitable for your needs, and that the GET handling is correct (especially for string-based variables). It's difficult to be more specific, without knowing more details about your tables and the information that they are monitoring. Dave - Looking for a deal? Find great prices on flights and hotels with Yahoo! FareChase.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can two MIB Tables be related and be required to share the same row index?
Yes, that worked by adding a space character, thanks. However, I do not want to give up on the MfD configuration just yet. I was reading about it and it says that it is the most complete configuration file offered and that existing MIBs are being transferred over to this new format. Based on this I would assume the MfD code should be able to do what I want. Perhaps I simply do not understand what SNMP should do regarding my two Tables. I will post another question and hopefully Robert can assist me a bit regarding the MfD, before I decide to move onto another conf file type. Dave Shield <[EMAIL PROTECTED]> wrote: On 30/05/07, Need Help wrote: > I tried your recommendation, but got the following error message: > > # mib2c -c mib2c.table_data.conf -Scache=1 ocStbHostAVInterfaceTable > no variable specified for -S flag. at /usr/local/bin/mib2c line 96. Umm... Try -S cache=1 (with a space after the 'S'). I can never get the hang of mib2c invocations! Dave - Get the Yahoo! toolbar and be alerted to new email wherever you're surfing. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
MfD specific questions for someone who is familiar with this code (Robert perhaps)
** I am using the MfD configuration file to generate code and I am very confused. I have the following two tables defined in my MIB file. TABLE 1 (osStbHostAVInterfaceTable): ocStbHostAVInterfaceIndex ocStbHostAVInterfaceType ocStbHostAVInterfaceDesc ocStbHostAVInterfaceStatus TABLE 2 (osStbHostIEEE1394Table): ocStbHost1394ActiveNodes ocStbHost1394DataXMission ocStbHost1394DTCPStatus ocStbHost1394LoopStatus ocStbHost1394RootStatus ocStbHost1394CycleIsMaster ocStbHost1394IRMStatus ocStbHost1394AudioMuteStatus ocStbHost1394VideoMuteStatus 1) Table1 has the "ocStbHostAVInterfaceIndex" field which I believe represents the row index in the table. Actually. I believe this index field is used as the row index value generated within NetSNMP by doing the following: a) calling the "se_find_value_in_slist()" routine (from within the "container_load" procedure) to obtain a unique index b) calling the "ocStbHostAVInterfaceTable_allocate_rowreq_ctx" routine to allocate new storage row space c) storing the "ocStbHostAVInterfaceIndex" value into the row by calling the following: ocStbHostAVInterfaceTable_indexes_set(rowreq_ctx, ocStbHostAVInterfaceIndex) Is my interpretation correct? Am I using the "ocStbHostAVInterfaceIndex" index field as the row number correctly? 2) You will notice Table2 does not have a specific "index" field defined, however the MIB file indicates Table2 is related to the "ocStbHostAVInterfaceIndex" field (which is defined from Table1). I have recently learned from this forum (thanks David) this means Table2 is simply an extension of Table1 and that Table1 is considered to be a sparse table. The MIB file states that when Table1's "ocStbHostAVInterfaceType" value indicates "1394", then Table2 data will exist, otherwise Table2 data will not exist. Lets say Table1 is populated and stored as the following: Example: Table1 Index Type Desc Status - 1 DVI DVI-Desc Enabled 2 1394 IEEE1394 Enabled 3 AnalogAnalog-DescEnabled 4 1394 IEEE1394 Enabled 5 HDMI HDMI-Desc Enabled I am not sure how to populate Table2 data within the MfD framework. Since Table2 does not have a specific "index" field defined, then I am not sure how to generate rows for Table2 to store the data correctly. 1) Should Table2 have the same internal NetSNMP row index used in Table1 (ie: 2 and 4) even though this index is not stored within Table2's data? 2) Do I need to call the "se_find_value_in_slist()" routine at all for Table2? 3) Do I need to still make the following procedure call for Table2 at all? ocStbHostAVInterfaceTable_indexes_set(rowreq_ctx, ) If so, then does the need to be a specific "ocStbHostAVInterfaceIndex" value which was used for Table1? I am obviously confused on how Table2 should have rows defined but does not have it's own unique index. I do not understand whether I have to use a previously obtained index value used in Table1 ni order to help me store Table2 data. I am also pretty sure I can not expand the data_context structure definition of Table1 to include the data fields defined in Table2, since this is not how the MIB file defined the Tables .. they are defined to be separate tables. Hopefully someone can help me out here with a good explanation. - Need a vacation? Get great deals to amazing places on Yahoo! Travel. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Why must I set the MIBS environment varibable when I set "snmp.conf"?
My snmp.conf file has the following two lines: mibdirs +/export/home/myname/snmp/usr/local/share/snmp/mibs mibs +OC-STB-HOST-MIB:DOCS-IF-MIB:CLAB-DEF-MIB:DOCS-IETF-BPI2-MIB My snmpd.conf file has the following one basic line: rocommunity mycommunity_ro I opened a brand new Root shellw window and performed the following commands: 1) I ran the following configuration commands: a)./configure \ --prefix=/export/home/myname/snmp/usr/local \ --srcdir=/export/home/myname/snmp/net-snmp-5.4 \ --enable-embedded-perl \ --enable-shared \ --with-mib-modules="OC-STB-HOST-MIB" b) make c) make install 2) I started the master agent by executing the following: /export/home/myname/snmp/usr/local/sbin/snmpd -f -L -Dread_config -M localhost & The following output (note the BOLD text) were produced indicating it could not find any of the MIB files, although it did seem it read my ".conf" files correctly: registered debug token read_config, 1 read_config: reading premib configuration tokens read_config: config path used for snmpd:/export/home/myname/snmp/usr/local/etc/snmp:/export/home/myname/snmp/usr/local/share/snmp:/export/home/myname/snmp/usr/local/lib/snmp:/root/.snmp (persistent path:/var/net-snmp) read_config: /export/home/myname/snmp/usr/local/etc/snmp/snmpd.conf: No such file or directory read_config: /export/home/myname/snmp/usr/local/etc/snmp/snmpd.local.conf: No such file or directory read_config: Reading configuration /export/home/myname/snmp/usr/local/share/snmp/snmpd.conf read_config: /export/home/myname/snmp/usr/local/share/snmp/snmpd.conf:31 examining: rocommunity mycommunity_ro read_config: /export/home/myname/snmp/usr/local/share/snmp/snmpd.local.conf: No such file or directory read_config: /export/home/myname/snmp/usr/local/lib/snmp/snmpd.conf: No such file or directory read_config: /export/home/myname/snmp/usr/local/lib/snmp/snmpd.local.conf: No such file or directory read_config: /root/.snmp/snmpd.conf: No such file or directory read_config: /root/.snmp/snmpd.local.conf: No such file or directory read_config: config path used for snmpd:/var/net-snmp (persistent path:/var/net-snmp) read_config: Reading configuration /var/net-snmp/snmpd.conf read_config: /var/net-snmp/snmpd.conf:32 examining: setserialno 316065965 read_config: /var/net-snmp/snmpd.conf:44 examining: ifXTable .1 14:0 18:0x $ read_config: /var/net-snmp/snmpd.conf:45 examining: ifXTable .2 14:0 18:0x $ read_config: /var/net-snmp/snmpd.conf:46 examining: ifXTable .3 14:0 18:0x $ read_config: /var/net-snmp/snmpd.conf:47 examining: ifXTable .4 14:0 18:0x $ read_config: /var/net-snmp/snmpd.conf:51 examining: engineBoots 8 read_config: /var/net-snmp/snmpd.conf:52 examining: oldEngineID 0x80001f88807036f77a67cf5546 read_config: Found a parser. Calling it: oldEngineID / 0x80001f88807036f77a67cf5546 read_config: /var/net-snmp/snmpd.local.conf: No such file or directory read_config: config path used for agentx:/export/home/myname/snmp/usr/local/etc/snmp:/export/home/myname/snmp/usr/local/share/snmp:/export/home/myname/snmp/usr/local/lib/snmp:/root/.snmp (persistent path:/var/net-snmp) read_config: /export/home/myname/snmp/usr/local/etc/snmp/agentx.conf: No such file or directory read_config: /export/home/myname/snmp/usr/local/etc/snmp/agentx.local.conf: No such file or directory read_config: /export/home/myname/snmp/usr/local/share/snmp/agentx.conf: No such file or directory read_config: /export/home/myname/snmp/usr/local/share/snmp/agentx.local.conf: No such file or directory read_config: /export/home/myname/snmp/usr/local/lib/snmp/agentx.conf: No such file or directory read_config: /export/home/myname/snmp/usr/local/lib/snmp/agentx.local.conf: No such file or directory read_config: /root/.snmp/agentx.conf: No such file or directory read_config: /root/.snmp/agentx.local.conf: No such file or directory read_config: config path used for agentx:/var/net-snmp (persistent path:/var/net-snmp) read_config: /var/net-snmp/agentx.conf: No such file or directory read_config: /var/net-snmp/agentx.local.conf: No such file or directory read_config: config path used for snmp:/export/home/myname/snmp/usr/local/etc/snmp:/export/home/myname/snmp/usr/local/share/snmp:/export/home/myname/snmp/usr/local/lib/snmp:/root/.snmp (persistent path:/var/net-snmp) read_config: /export/home/myname/snmp/usr/local/etc/snmp/snmp.conf: No such file or directory read_config: /export/home/myname/snmp/usr/local/etc/snmp/snmp.local.conf: No such file or directory read_config: Reading configuration /export/home/myname/snmp/usr/local/share/snmp/snmp.conf read_config: /export/home/myname/snmp/usr/local/share/snmp/snmp.conf:30 examining: mibdirs +/export/home/myname/snmp/usr/local/share/snmp/mibs read_config: Found a parser. Calling it: mibdirs / +/export/home/myname/snmp/usr/local/share/snmp/mibs read_config:initmib: using mibdirs: +/export/home/myname/snmp/usr/local/share/snmp/mibs read_c
Re: Can I put LD_LIBRARY_PATH into a "conf" file?
Ok, it seems this error is only produced when I try to start my specialized MFD (mibs for dummies) agent directly with the following: ./ocStbHostAVInterfaceTable -f -L -DocStbHostAVInterfaceTable -M localhost:1161 & I followed the MFD coding tutorial and it recommended starting the specific agent related to the specific MIB table I implemented (ie: ocStbHostAVInterfaceTable) for testing purposes. When I do this, then the library files can not be found. However, this problem does not occur when I start the standard master agent via the "snmpd" command and test my MIB table code. I guess I do not have a ny worries anymore. Magnus Fromreide <[EMAIL PROTECTED]> wrote: On ons, 2007-05-30 at 06:09 -0700, Need Help wrote: > I already include the following --prefix when performing the > "configure" command: > > --prefix=/export/home/myname/snmp/usr/local > > ... however, this does not allow for the ".so" library files to be > found in the following directory: > >/export/home/myname/snmp/usr/local/lib/ And you have executed make install? What is the output of objdump -p /export/home/myname/snmp/usr/local/bin/snmpwalk /MF - Be a better Heartthrob. Get better relationship answers from someone who knows. Yahoo! Answers - Check it out. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can two MIB Tables be related and be required to share the same row index?
My biggest concern is whether I need to use an internal SNMP row index from Table1 to somehow populate stuff in Table2 within NetSNMP or whether I can simply start populating rows for Table2 with new row index values which have no relationship to Table1 at all. Somehow I keep thinking there is this relationship between Table1 and Table2 which needs to be maintained, although I can not figure out if this is true or not. If it turns out to be true and I "do" need to maintain the relationship when populating Table2 data then I have no idea how this needs to be done and this is bothering me. If there is no need to maintain a relationship between Table1 and Table2 since the relationship is maintained automatically due to how the MIB file is defined, then maybe I do not have any worries. I can simply populate Table2 without caring how Table1 has been populated .. can you confirm this for me? I am brand new to SNMP and thus have no idea how SNMP data is interpreted once it has been received in the "real world". In my case, I would assume an SNMP operator would request all AVInterfaces (Table1 data) to be displayed. Now the SNMP operator can look through the list of interfaces to find the "1394" interfaces which exist. Finally, the SNMP operator would request "1394" specific information from Table2 (ie: the 1394 data table) to be displayed. Does this seem correct? Now, lets say there are five "AVInterfaces" which are displayed from making the first SNMP request on Table1: IndexAVInterface 1 DVI 2 1394 3 HDMI 4 1394 5 DVI Based on the aboev display of data, the SNMP operator would know that two 1394 interfaces exist which means that the 1394 Table (ie: Table2) will have two entries. If the SNMP operator wanted to request specific data relating to the 1394 AVInterface from "row 4" above, then how would the SNMP operator request the data from Table2? Can the SNMP operator request "Table2" 1394 data by somehow indicating "4" as an index? You mentioned I should not consider Table2 to be a separate table, but instead consider Table2 to be an extension of Table1 only. This is confusing me as to how an SNMP operator can request a certain row from within Table2. Basically, the operator knows there are going to be two row entries in Table2, but I have no idea how the SNMP operator would be smart enough to figure out which of these two entries in Table2 is the one related to "Table 1, row 4". Dave Shield <[EMAIL PROTECTED]> wrote: On 30/05/07, Need Help wrote: > Perhaps I simply do not understand what SNMP should do > regarding my two Tables. It's quite reasonable to treat these tables as completely independent. As long as you populate them with the correct information, the link between the tables will be made automatically (since the underlying data is linked). Dave - Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Why must I set the MIBS environment varibable when I set "snmp.conf"?
Yep stupid mistake . the options I was using were specific to the "specialized MfD agent" which I tested a long time ago.I should not have used the same options when moving towards executing the "snmpd" master agent. My "snmpd" command really did not make that much sense. Think I will simply start the agent as follows instead: /export/home/rosent1/snmp/usr/local/sbin/snmpd & Dave Shield <[EMAIL PROTECTED]> wrote: On 31/05/07, Need Help wrote: > 2) I started the master agent by executing the following: > > /export/home/myname/snmp/usr/local/sbin/snmpd -f -L > -Dread_config -M localhost & "-M localhost" means "look in the directory 'localhost' for MIB files" > Question: > 1) Why are the MIB errors produced when starting the master agent? Because you've told it to look in the directory 'localhost' This command-line option overrides any config file settings. > 2) Why must I set the MIBS environment variable at all if the "snmp.conf" > file indicates which MIBS should be included? > > PS: Just to be complete I wanted to indicate that I am using the "snmpwalk" > command which comes with NetSNMP to execute the walk request: > > /export/home/myname/snmp/usr/local/bin/snmpwalk -v1 -c > mycommunity_ro localhost ocStbHostAVInterfaceTable Try adding '-Dread_config' to this snmpwalk command. Is it reading the expected snmp.conf file? Dave - Need a vacation? Get great deals to amazing places on Yahoo! Travel. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can two MIB Tables be related and be required to share the same row index?
Ok, so I need to use the same index for Table2 as I used in Table1, but I do
not know how to actually do this?
Here is what I am doing to create Table1 currently.
In the "container_load()" routine I perform the following steps to populate all
requried indices in the ocStbHostAVInterfaceTable:
1) Obtain a unique NetSNMP index:
ocStbHostAVInterfaceIndex =
se_find_free_value_in_slist("ocStbHostAVInterface")
Note: The "ocStbHostAVInterface" input parameter is a unique text string
which I made up.
2) Indicate the index has been reserved for the ocStbHostAVInterface table:
se_add_pair_to_slist("ocStbHostAVInterface", strdup(),
ocStbHostAVInterfaceIndex)
Note: The index (ocStbHostAVInterfaceIndex) is associated with a
and then stored against the "ocStbHostAVInterface" table
3) Allocate new a row for the table:
rowreq_ctx = ocStbHostAVInterfaceTable_allocate_rowreq_ctx(NULL);
4) Store the index into the row:
ocStbHostAVInterfaceTable_indexes_set(rowreq_ctx, ocStbHostAVInterfaceIndex)
5) Populate the rest of the data table fields now for Table1:
ocStbHostAVInterfaceIndex =
ocStbHostAVInterfaceType =
ocStbHostAVInterfaceDesc =
ocStbHostAVInterfaceStatus =
The four steps above are used to define each required row in the table with a
unique index. For example, if there are 20 "AVInterfaces" required, then there
will be 20 rows in the table.
Now, it is time to create Table2.
Inside the "container_load()" routine of Table2, I do not believe I want to
perform any of the 4 steps above, since I do not want to generate a new index
or new row for Table2 entries correct?
If no new index and no new row should be created for Table2, then I am not sure
how to obtain the internal NetSNMP index (ie: ocStbHostAVInterfaceIndex)
previously generated and stored for Table1.
Is there a way in which I could loop through all rows of Table1? If so, then I
could loop through each row of Table1 to find which "ocStbHostAVInterfaceType"
fields are set to the "1394" interface enum (since Table2 is only related to
"1394" interface data).
Now, lets pretend I find that "row2" and "row4" of Table1 have an interface
type of "1394" somehow. I would not be sure what I need to do with index 2 and
4 in order to populate Table2. Basically, if I find the index from Table1
which is related to my Table2 row data, I still have no idea how to populate
the Table2 data. I can not store Table2 data fields into the rows defined for
Table1 since the row defined for Table1 does not include the Table2 fields.
The row definition for Table1 only has four fields in it:
ocStbHostAVInterfaceIndex
ocStbHostAVInterfaceType
ocStbHostAVInterfaceDesc
ocStbHostAVInterfaceStatus
So, if I can somehow determine which row index from Table1 is the index I need
to use Table2, then I still have no idea how to actually use the index for
popultaing Table2 once I have it? Is there some special routine I need to call
from within the "container_load()" procedure which will link that particular
index to Table2 and Table1 somehow?
I am afraid you are going to say I need to wait for Robert to response,
although I have never seen a Robert on the forum respond to any of my postings
yet, so I might be stuck here and not understand how to proceed.
I never thought an SNMP table could be an extension of another table, so this
is obviously causing me grief.
Thanks for all your help though much appreciated.
Dave Shield <[EMAIL PROTECTED]> wrote: On 31/05/07, Need Help wrote:
> My biggest concern is whether I need to use an internal SNMP row index from
> Table1 to somehow populate stuff in Table2 within NetSNMP or whether I can
> simply start populating rows for Table2 with new row index values which have
> no relationship to Table1 at all.
If Table2 is meant to augment Table1 (either directly, or as a
table-in-a-table),
then the index values you use for Table2 must match those used for Table1.
The responsibility for doing this lies with the 'data_access' or
'load' routines.
As long as this is done, then the rest of the agent processing will work
correctly.
> Somehow I keep thinking there is this relationship between Table1 and Table2
> which needs to be maintained
Yes - this is done via the (shared) index values.
Imagine you have two children - in separate rooms, so that they can't
see or hear each other. You stand in the corridoor between them, and
give each of them four cards.
The cards you give to the first child contain the numbers 7, 3, 5, and 6.
The cards you give to the second child contain the numbers 49, 9, 25 and 36.
If you ask the two children to both hold up the second card, then you'll
see that the square of 3 is 9, and similarly fo
Re: Help me understand this code snipet please
Thanks for the information . Hey, I believe you might be the "Robert" who "David" was referring to who might be able to help answer some questions regarding the "mfd" configuration. David has helped me out quite a bit, but perhaps you might have a look at my post to see if you can answer some specific "mfd" questions? My post is entitled: "Can two MIB Tables be related and be required to share the same row index?" Here is a quick summary to catch you: I am new to SNMP and went through the ifTable mfd tutorial which is provided to learn about the "mfd" approach and how to use this configuration for my MIB module. I populated one of the tables (ocStbHostAVInterfaceTable) in my MIB (which I refer to as "Table1" in my posts) with values in the "container_load()" procedure and can now "snmpwalk" through the contents nicely. I wanted to now populate the next table (ocStbHostIEEE1394Table) in my MIB (which I refer to as "Table2" in my posts) but this is not as easy as I thought it would be. After showing David my MIB file, he informed me that my Table2 is an a real standalone table but is defined to be an extension to Table1. It seems that "Table1" is created to have all the AVInterface values which can possible exist. For each row in Table1 which is of type "1394 AV Interface", then a row in "Table2" will exist since Table2 only holds more specific information relating to "1394" interfaces only. My problem is, I am not sure how to populate Table2. David mentioned I need to obtain the associated AVInterface index value stored for "Table1" to be used for Table2. Anyway, perhaps you could read a few of my more recents postings on this topic to catch up, and then perhaps can give me some of your opinions as well. I am interested in hearing what you and David have to say about this . Thanks for any help you can provide. Robert Story <[EMAIL PROTECTED]> wrote: On Fri, 18 May 2007 06:20:43 -0700 (PDT) Need wrote: NH> Then what is the purpose of the "row_prep" procedure ? Basically, when would i place code in the "row_prep" procedure? The only thing the container really needs is the index values, so it can find the right instances when a request comes in. The row_prep functions is called for the selected instance, at which time the module can fetch the actual data associated with the row. - Boardwalk for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can two MIB Tables be related and be required to share the same row index?
Most likely I simply interpreted some description incorrectly along the way . Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 31 May 2007 09:39:55 +0100 Dave wrote: DS> On 30/05/07, Need Help wrote: DS> > However, I do not want to give up on the MfD configuration just yet. I was DS> > reading about it and it says that it is the most complete configuration file DS> > offered and that existing MIBs are being transferred over to this new DS> > format. DS> DS> *Robert* wants to see everything moved over to MfD, yes. DS> That should not be taken as a policy statement for the project as a whole. No, I don't actually want everything moved over to MfD. MfD is intended to help novices implement simple mibs quickly. There are several examples in the agent, as proof-of-concepts. Please let us know where you got the impression that everything was being converted, so that page can be corrected. - 8:00? 8:25? 8:40? Find a flick in no time with theYahoo! Search movie showtime shortcut.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can two MIB Tables be related and be required to share the same row index?
Do you recommend I generate my code using some other type of configuration file or is it possible to implement your suggestion using the "mfd" code layout approach? In addition I have no idea what you mean by subcontainers and filters. If you can elaborate a bit that would be helpful. Perhaps give me some examples as to what types of procedures I need to call or how one would set up a subcontainer with filters Anything would be helpful Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 31 May 2007 11:17:22 -0700 (PDT) Need wrote: NH> OK, so I need to use the same index for Table2 as I used in Table1, but I do not know how to actually do this? Well, you've stepped out of the bounds of a 'simple' table, so Mad won't auto-generate nice neat ready to use code. However, there is an example of MfD + shared indexes - ifTable and ifXTable. Basically, they share a single container. Since you have sparse secondary tables, that won't quite work for you. NH> Here is what I am doing to create Table1 currently. NH> NH> In the "container_load()" routine I perform the following steps to populate all requried indices in the ocStbHostAVInterfaceTable: NH> NH> 1) Obtain a unique NetSNMP index: NH> 2) Indicate the index has been reserved for the ocStbHostAVInterface table: NH> 3) Allocate new a row for the table: NH> 4) Store the index into the row: NH> 5) Populate the rest of the data table fields now for Table1: NH> NH> Now, it is time to create Table2. NH> NH> Inside the "container_load()" routine of Table2, I do not believe I want to perform any of the 4 steps above, since I do not want to generate a new index or new row for Table2 entries correct? NH> NH> If no new index and no new row should be created for Table2, then I am not sure how to obtain the internal NetSNMP index (ie: ocStbHostAVInterfaceIndex) previously generated and stored for Table1. NH> NH> Is there a way in which I could loop through all rows of Table1? If so, then I could loop through each row of Table1 to find which "ocStbHostAVInterfaceType" fields are set to the "1394" interface enum (since Table2 is only related to "1394" interface data). Yes, a container iterator (or the FOR_EACH macro) can be used to loop through a container. However, I suggest a different approach. A container can have a linked list of sub-container, and those subcontainers can have an associated insert_filter. So, the first/primary table would create not just 1 container, but 1 + N for each of the secondary/sparse related tables. Each of the secondary containers would define a filter such that only the appropriate row indexes would end up in that container. Then each of the secondary tables would use the associated sub-container from the primary table, instead of creating their own. Now having said that, there aren't any examples of using subcontainers with filters, and I can't even recall using one myself, but this is exactly the scenario that insert_filters were written for. - Shape Yahoo! in your own image. Join our Network Research Panel today!- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: MfD specific questions for someone who is familiar with this code (Robert perhaps)
Ok, I know I can change any code I want to fit my needs, however, my concern with expanding the data_context structure of Table1 with fields from Table2 was that I thought performing a "snmpwalk" through Table1 would then display Table2 fields now and that would be bad since Table2 fields really do not belong in the Table1 "snmpwalk" output. Are you saying if I add additional fields to the "Table1" data_context structure, then the "snmpwalk" will somehow only display the Table1 originally defined fields only and "not" display these new fields? Robert Story <[EMAIL PROTECTED]> wrote:NH> I am also pretty sure I can not expand the data_context structure definition of Table1 to include the data fields defined in Table2, since this is not how the MIB file defined the Tables .. they are defined to be separate tables. It's just code, you can do whatever you want! In fact, this is what the ifTable/ifXTable code does... the ifTable structures have been expanded to include the data for ifXTable entries. however, those tables have a 1-1 relationship, not a sparse relationship. But if you don't mind wasting the space in each row with all the fields for each table that augments table 1, you can simply put all the field definitions in table 1's data structure. If the fields are mutually exclusive, you could probably even use a union to reduce wasted space in the data context. Alternatively, you could just have the row indexes populated during the load, and use the row_prep function to fetch the row data as needed. - Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: 5.4.1.pre1 now available
Being new to the whole NetSNMP structure and everything, I kind of like seeing the "-mib" included in the directory name for the MIB.It reminds me the directory is for MIB specific stuff rather than some generic directory. My 2-cents of course Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 24 May 2007 09:41:33 -0700 Wes wrote: I like the idea of having directories named after the mibs, but I guess we could strip off the '-mib'. grumble. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders - Food fight? Enjoy some healthy debate in the Yahoo! Answers Food & Drink Q&A.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Should these ".h" files be generated for me?
Here is the configure command I am currently using: ../configure \ --prefix=/export/home/rosent1/snmp/usr/local \ --srcdir=/export/home/rosent1/snmp/net-snmp-5.4 \ --enable-embedded-perl \ --enable-shared \ --with-mib-modules="OC-STB-HOST-MIB" The "--with-mib-modules" option seems to tell NetSNMP to "look for" the "agent/mibgroup/OC-STB-HOST-MIB.h" file only rather than create it. You stated that the "--with-mib-modules" option should mention each "table". Does this mean each table defined in the MIB should be listed in this option? I thought I should only list the name of the MIB file only, not list all my table names. Robert Story <[EMAIL PROTECTED]> wrote: On Fri, 25 May 2007 07:34:05 -0700 (PDT) Need wrote: NH> I created the ".../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/" directory, issued the "mib2c" command in this directory for the "ocStbHostAVInterfaceTable" OID node and the code was generated for me and placed into this directory. I discovered the reason why my original testing via "snmpwalk" did not work was because the following files did not exist: NH> NH> 1) .../agent/mibgroup/OC-STB-HOST-MIB.h NH> 2) .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAVInterfaceTable.h NH> NH> These files seem to link the new directory structures together and seem to be required for testing to proceeed. After I created these files manually, then the "snmpwalk" command worked fine. You generated each table with mib2c, and mib2c (I think) should tell you that you need to configure --with-mib-modules=mysbudir. So, you wouldn't need those header files if you specified each table in --with-mib-modules. When someone gets around to fixing the mfd template to generate code for each table in a mib, they should also generate these files... - You snooze, you lose. Get messages ASAP with AutoCheck in the all-new Yahoo! Mail Beta. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Can two MIB Tables be related and be required to share the same row index?
Well, I went to the link you suggested and read about the Containers, however, nothing is really making any sense to me. I am not real sure how to create a sub-Container from an existing container. Perhaps you could provide a simple code example of what you are talking about? Robert Story <[EMAIL PROTECTED]> wrote: On Fri, 1 Jun 2007 07:05:59 -0700 (PDT) Need wrote: NH> Do you recommend I generate my code using some other type of configuration file or is it possible to implement your suggestion using the "mfd" code layout approach? NH> NH> In addition I have no idea what you mean by subcontainers and filters. If you can elaborate a bit that would be helpful. Perhaps give me some examples as to what types of procedures I need to call or how one would set up a subcontainer with filters NH> NH> Anything would be helpful Well, I've used up my time for the day trying to catch up on the backlog of messages, so I'll have to be brief... MfD uses a netsnmp_container to store the rowreq_ctx structure for a table... the container_load routine does the inserting. If you create additional containers, the CONTAINER_INSERT will insert a pointer to the row in the additional containers. More information can be found at "http://www.net-snmp.org/wiki/index.php/Containers";, esp the part on secondary indexes/containers. At least there is an example of how to create additional subcontainers. I'll have to leave filters for another day... but poke around in snmplib/container.c, searching on filter, and see if that helps... - Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Expanding the "data_context" structure to include other Table fields
My MIB file has one main table defined (Table1) and has multiple other tables (Table2,3,4,5,6) defined which are extensions to Table1. So Robert . instead of me implementing sub-containers, lets say I implement your other suggestion of adding all the fields defined in Table2,3,4,5,6 into the "data_context" structure for Table1. I believe I will be able to use a "union" to define these new fields within the structure to conserve space since each table is mutually exclusive to each other. Now, I would like to make sure I understand how to populate the data_context correctly. I assume the "container_load()" procedure of Table1 (main table) will be called first (somehow) and will be responsible for allocating new rows and generating new index values for each row and the "container_load()" procedures in Table2,3,4,5,6 will not be performing any of these functions . correct? When the "container_load()" procedure for Table1 is called, I would like to populate all of Table1 fields at this time, however, must I populate all fields defined in Table2,3,4,5,6 at this time as well? If I do not populate the fields from Table2,3,4,5,6 at this time, then how will I be able to populate the fields later? Will the "container_load()" procedure for Table2,3,4,5,6 be called eventually and should I populate those fields at this time instead? If so, how will I know what correct table index (ie: row index) from Table1 the data should be inserted into at this time? Perhaps you can recommend where certain functionality should be implemented within the "mfd" code so I can get a better picture of how this should be done? Also, just curious when the cache expires, then I assume the "container_load()" procedure is called again to regenerate the complete table over again as it originally did ... is this correct? I assume new rows will be allocated again. - Pinpoint customers who are looking for what you sell. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Expanding the "data_context" structure to include other Table fields
1) Lets say the first request made is to "snmpwalk" through Table2. Are you saying that Table1's container_load() procedure has never been called yet so none of the index values have been loaded and none of the rows have been allocated and placed into the Table1 container yet? If this is true, then how does an "snmpwalk" through Table2 work since no rows have been allocated to store the data yet? I am getting way confused. What actually happens when an "snmpwalk" of Table2 occurs first? Does the container_load() procedure of Table2 get called first? If so, then I am confused since I thought Table2's container_load() would not be reserving index values and not be performing any row allocation (basically not doing much of anything really) since I thought all of this would be handled in Table1 container_load() procedure only. What exactly should be placed into the container_load() procedure of Table2? If you indicate I should be reserving index values and/or allocating rows for the container then I am confused since I thought all of this would be done in in Table1 functionality. Actually, by now you understand I have a main Table1 (with 4 fields) and a Table2 (with 8 fields) which is an extension to Table1. Perhaps you can describe to me what functionality should be placed into the Table1_container_load(), Table1_row_prep(), Table2_container_load() and Table2_row_prep() routines? I think my problem is that I understand what the container_load and row_prep routines should do, but have no idea how to use them correctly when one of my tables is an extension of another table. 2) You state "Luckily, there is a failry easy way around that, which is sharing a single cache as well. See the function _ifXTable_container_init to see how it looks up the ifTable cache to share a container". I looked at this code and can see how another table's cache can be connected to the container of another table. Perhaps you can explain to me "why" I should be doing this as am I not clear as to why you are recommending this code to me in the first place. 3) You stated "Now, the problem is that when you are loading the container, you will have no idea which of the 6 tables triggered the load." Well this seems bad since I will not know what I am really loading? Are you indicating I should not be implementing it this way by adding all fields into the data_context of Table1? Is this your way of indicating to me that I will run into too many problems with combining all fields into the data_context of Table1 and that I should use sub-containers after all? 4) I wish you were local so I could stop by and have you simply draw some ideas on some paper as to what you are recommending. It is challenging for me to grasp how to do all of this as well as having no one here locally to bounce ideas around with. Again, thank you for your time and patience. Robert Story <[EMAIL PROTECTED]> wrote: On Fri, 1 Jun 2007 12:54:20 -0700 (PDT) Need wrote: NH> So Robert . instead of me implementing sub-containers, lets say I implement your other suggestion of adding all the fields defined in Table2,3,4,5,6 into the "data_context" structure for Table1. I believe I will be able to use a "union" to define these new fields within the structure to conserve space since each table is mutually exclusive to each other. Ok.. there is one issue with sharing a single container, but you may not care. The problem is that when walking the secondary tables, you will have to add code to each to make sure the current row index applies to the table in question, and then tell the agent to skip the row if it does not. So, if you have 1000 rows in Table1, and only 10 of which are in Table 2, there will be 990 wasted calls to Table2. Also note that there currently is not any generated code to handle skipping an inappropriate row, as currently the assumption is that the container only has appropriate rows. But it should be fairly trivial to fix that. NH> I assume the "container_load()" procedure of Table1 (main table) will be called first That is an invalid assumption. By default, the container_load function is called when a request comes in for a table. So it is possible that the first query the agent gets will be for table2, and not table1. Luckily, there is a failry easy way around that, which is sharing a single cache as well. See the function _ifXTable_container_init to see how it looks up the ifTable cache to share a container. Now, the problem is that when you are loading the container, you will have no idea which of the 6 tables triggered the load. NH> When the "container_load()" procedure for Table1 is called, I would like to populate all of Table1 fields at this time, however, must I populate all fields defined in Table2,3,4,5,6 at this time as well? NH> NH> If I do not populate the fields from Table2,3,4,5,6 at this time, then how will I be NH> able to populate the fields later?
Re: Hopefully, this explains my confusion a bit more
Sorry about the word document. Just thought it would be easier to ask some questions with some pictorial table data being shown insetadof me trying to do this in an email format. Anyway, let me as you this follow up question: You stated "you don't have to use the se list method, but you must ensure that the same row has the same index each time the container is loaded" I thought the "container_load" routine reloads the container from "scratch" when it is called, so why must and index (which was generated previously and stored in a particular row of the container) be reused and placed in the same exact row of the container when the container is being rebuilt from scratch. Am I not understand something? Robert Story <[EMAIL PROTECTED]> wrote: On Mon, 4 Jun 2007 12:22:53 -0700 (PDT) Need wrote: NH> see attached Microsoft Word document for description .. Arggh... you aren't going to win any friends by posting word docs. You've just upped the threshold for the amount of work I have to do to reply, switching between apps and copying and pasting. So you'll be getting less verbose answers. yes, loading with just types is ok. yes, you need to re-use the same index. you don't have to use the se list method, but you must ensure that the same row has the same index each time the container is loaded. If using row_prep, you won't be populating the whole container for a type - you will get a pointer to a specific row, and only need to load the data for that row. - Boardwalk for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Hopefully, this explains my confusion a bit more
I am not familiar how SNMP is used in the real world so explanations like these help me out a lot. Good job and thanks. Dave Shield <[EMAIL PROTECTED]> wrote: On 05/06/07, Need Help wrote: > You stated "you don't have to use the se list method, but you must ensure > that the same row has the same index each time the container is loaded" > > I thought the "container_load" routine reloads the container from "scratch" > when it is called, so why must and index (which was generated previously and > stored in a particular row of the container) be reused and placed in the > same exact row of the container when the container is being rebuilt from > scratch. Am I not understand something? Think about how this looks to the admin who's trying to monitor his/her systems. I'm particularly interested in one specific tuner that's been playing up recently, so I walk the AVInterfaceTable and the TunerTable, and find that it is the device with index 582 So I set up a script to regularly monitor the settings of the row with index 582. A few minutes later, your "container_load" routine kicks in to re-load the latest information, and chooses a completely new set of index values. Suddenly row 582 refers to a completely different bit of kit (or nothing at all), and the tuner that I'm actually trying to monitor now has index 319. That's clearly not very helpful for a sys admin. It's standard practise in SNMP for index values to remain stable - once you've assigned a particular index to a given row (and hence to a particular piece of hardware, or software, or whatever the MIB is monitoring), then that index should remain the same. It's usually acceptable to re-assign indexes if the whole system reboots (or the SNMP agent is killed and restarted). But not in normal operation. Does that make sense? Dave - Luggage? GPS? Comic books? Check out fitting gifts for grads at Yahoo! Search.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Expanding the "data_context" structure to include other Table fields
OK, good stuff here . very helpful ... thanks.
Here are a few more questions ...
I have Table1 (main table) and Table2 ("1394 table" which is an extension of
Table1). Lets say I have updated the Table2_container_init() routine to
indicate that Table2 should use the same cache that Table1 uses. Now, when
the first SNMP request is made and it is for Table2 (ex: "snmpwalk" request
perhaps) then the Table1_container_load() routine will be called. Is this all
correct so far?
Inside the Table1_container_load() routine I will newly allocate all the
required rows as well as assigning an index to each of these rows. If this is
a subsequent call to Table1_container_load() then I will make sure to rebuild
the Table1 from scratch by allocating all new rows, but making sure to use the
same index values for each row as used before. Is this correct so far?
Lets say that Table1 has the following 4 rows (and 2 columns) populated so far:
index=1 type=1394
index=2 type=DVI
index=3 type=1394
index=4 type=Tuner
Now, since this SNMP request was for Table2, then the Table2_row_prep() routine
will eventually be called. This procedure's interface provides a "row_context"
data structure in which I can obtain the specific row index in which this
request is related. I can then simply populate this specific row (from Table1)
with the appropriate Table2 data is this correct?
For a "snmpwalk" request will the Table2_row_prep() routine be called only
twice and will the procedure interface supply row_conitext data for row 1 and 3
(since these are the indexes which relate to the 1394 Table2)? I am not sure
how the agent would know which rows of Table1 are being used as extensions for
Table2 data, so maybe you can clarify whether this works or not. If is does
not work like this then perhaps you can tell me how I can determine which row
from Table1 I need to populate with my Table2 data when the Table2_row_prep()
routine is called.
Robert Story <[EMAIL PROTECTED]> wrote: On Mon, 4 Jun 2007 10:30:25 -0700 (PDT)
Need wrote:
NH> 1) Lets say the first request made is to "snmpwalk" through Table2. Are
you saying that Table1's container_load() procedure has never been called yet
so none of the index values have been loaded and none of the rows have been
allocated and placed into the Table1 container yet? If this is true, then how
does an "snmpwalk" through Table2 work since no rows have been allocated to
store the data yet?
By default, yes. Remember, mib2c does not know about the relationship between
the 2 tables, so the generated code treats each independently, with their own
container and data.
NH> I am getting way confused. What actually happens when an "snmpwalk" of
Table2 occurs first? Does the container_load() procedure of Table2 get called
first?
Yes, by default it would. That is why I told you to use a shared cache in my
last message. If each table uses the same cache, they when _any_ of them are
accessed, the will call the table1 container_load function.
NH> What exactly should be placed into the container_load() procedure of
Table2?
Nothing. You could actually delete it, if you also deleted the code that
referenced it in the interface code. With a little work, the mib2c code could
be updated to handle this automatically. Let me know if you want to sponsor a
little work in this area. ;-)
NH> Actually, by now you understand I have a main Table1 (with 4 fields) and a
Table2 (with 8 fields) which is an extension to Table1. Perhaps you can
describe to me what functionality should be placed into the
Table1_container_load(), Table1_row_prep(), Table2_container_load() and
Table2_row_prep() routines? I think my problem is that I understand what the
container_load and row_prep routines should do, but have no idea how to use
them correctly when one of my tables is an extension of another table.
Table1_container_load(): load all the indexes. Optionally, load data context
for tabels 1-N.
Table1_row_prep(): load data context for table 1, if not done in container_load
Table2_container_load(): nothing
Table2_row_prep(): load data context for table 2, if not done in
container_load
NH> 2) You state "Luckily, there is a failry easy way around that, which is
sharing a single cache as well. See the function _ifXTable_container_init to
see how it looks up the ifTable cache to share a container".
NH>
NH> I looked at this code and can see how another table's cache can be
connected to the container of another table. Perhaps you can explain to me
"why" I should be doing this as am I not clear as to why you are recommending
this code to me in the first place.
The cache handler is the one that takes care of loading the container when a
request comes in.
NH> 3) You stated "Now, the problem is that when you are loading the container,
you will have no idea which of the 6 tables triggered the load."
NH>
NH> Well this seems bad since I will not know wha
Re: Expanding the "data_context" structure to include other Table fields
1) I updated my code a bit but for some reason the Table2_row_prep() routine is
never called when I perform a "snmpwalk" of Table2. Any ideas why
"Table2_row_prep()" is not being called at all (see the steps a-e below)?
Here are the two tables I am dealing with for testing:
Table1(ocStbHostAVInterfaceTable)
Table2(ocStbHostAnalogVideoTable)
a) I updated the Table1(ocStbHostAVInterfaceTable) data_context structure to
include the fields from Table2(ocStbHostAnalogVideoTable).
b) I updated Table2 "_ocStbHostAnalogVideoTable_container_init()" routine with
the following code only, which I believe should tell Table2 to use the same
cache as Table1(ocStbHostAVInterfaceTable):
if_ctx->cache =
netsnmp_cache_find_by_oid(ocStbHostAVInterfaceTable_oid,
ocStbHostAVInterfaceTable_oid_size);
if (NULL != if_ctx->cache) {
if_ctx->container = (netsnmp_container *) if_ctx->cache->magic;
return;
} else {
snmp_log(LOG_ERR, "error finding ocStbHostAVInterfaceTable cache\n");
}
c) I added printf statements to the "init_data", "container_init",
"container_load" and "row_prep" routines of Table1 and Table2 to verify the
flow through the code was correct when an SNMP request was performed.
d) When I start the SNMP agent the following flow is displayed. Does this
seem correct so far?
ENTER ocStbHostAnalogVideoTable_init_data()
EXIT ocStbHostAnalogVideoTable_init_data()
ENTER _ocStbHostAnalogVideoTable_container_init()
EXIT _ocStbHostAnalogVideoTable_container_init()
ENTER ocStbHostAVInterfaceTable_init_data()
EXIT ocStbHostAVInterfaceTable_init_data()
ENTER ocStbHostAVInterfaceTable_container_init()
EXIT ocStbHostAVInterfaceTable_container_init()
ENTER ocStbHostAVInterfaceTable_container_load()
EXIT ocStbHostAVInterfaceTable_container_load()
e) When I request a "snmpwalk" through Table1(ocStbHostAVInterfaceTable) then
all of the fields of Table1 seem to displayed appropriately, however, doing a
"snmpwalk" through Table2(ocStbHostAnalogVideoTable), returns nothing. I
simply get the Linux cursor back, without any error or anything. Actually,
none of my printf statements are displayed either, which means that the
Table2_row_prep() routine is not being called at all. Note: I realize the
"Table2_container_load()" routine is not being called (which is normal) since
Table2 is using the same cache as Table1. I actually commented out all of the
internal code in the "Table2_container_load()" routine, but I left the actual
routine visible. Basically, the routine simply does nothing now, it is just
empty.
2) In regards to "me" stating I will rebuild Table1 when the container_load()
routine is called, "you" stated "You don't 'have' to start from scratch, but
it's probably the easiest way".
If I wanted to start from scratch and repopulate Table1, then I need to make
sure to use the same index values for each row as I used before. In order to
do this, I would assume I would need to store each index value by calling the
"se_add_pair_to_slist" routine. Basically, I would need to link a unique text
string to each of the index values being stored so when it comes time to
repopulate the container (allocate new rows from scratch) then I can search for
the unique text string (using the "se_find_value_in_slist" call) to find which
index value was related previously then I can simply use that same index value
for the regeneration of the container Table correct?
Now, it would be nice if I did not have to regenerate the container used for
Table1 everytime the container_load() routine was called, however, I am not
sure how to do this? I thought Table1's container was freed(released) once the
cache has expired and a new snmp request is received, so regenerating the
container was necessary, but I guess I am wrong. How can a Table container be
maintained and not be required to rebuild itself when the container_load()
routine is called? If this will take a lot of effort to explain, then perhaps
we should wait to have this discussion in the future, after my basic stuff is
working. Although if this is an easy concept, then please explain.
3) You indicate that the "Table2_row_prep()" routine will be called for each
row in Table1. This is fine, since I can check whether the current row
actually relates to Table2 easily by checking the "type" value defined in
"Table1". If the row is not related to Table2, then you indicate I should
return MFD_SKIP. Yes, this seems straightforward, however (and you probably
know I would be asking this), what changes must I make to the table interface
code of each of the secondary tables in order for them to handle the new
MFD_SKIP return value? Actually by "interface code" do you mean the
"x_interface.c" files need to be updated, or
are you referring to some other code file which would need to be updated?
Based on the "ifTable" tutorial, I assumed MFD_SKIP
Re: Expanding the "data_context" structure to include other Table fields
Referring to my (3) question (shown below in attached email).
I see the Table2 "_mfd_ocStbHostAnalogVideoTable_object_lookup()" routine
calls the Table2 "ocStbHostAnalogVideoTable_row_prep()" routine. I attached
this code below for reference:
static int
_mfd_ocStbHostAnalogVideoTable_object_lookup(netsnmp_mib_handler *handler,
netsnmp_handler_registration
*reginfo,
netsnmp_agent_request_info
*agtreq_info,
netsnmp_request_info
*requests)
{
int rc = SNMP_ERR_NOERROR;
ocStbHostAnalogVideoTable_rowreq_ctx *rowreq_ctx =
netsnmp_container_table_row_extract(requests);
DEBUGMSGTL(("internal:ocStbHostAnalogVideoTable:_mfd_ocStbHostAnalogVideoTable_object_lookup",
"called\n"));
/*
* get our context from mfd
* ocStbHostAnalogVideoTable_interface_ctx *if_ctx =
* (ocStbHostAnalogVideoTable_interface_ctx
*)reginfo->my_reg_void;
*/
if (NULL == rowreq_ctx) {
rc = SNMP_ERR_NOCREATION;
}
if (MFD_SUCCESS != rc)
netsnmp_request_set_error_all(requests, rc);
else
ocStbHostAnalogVideoTable_row_prep(rowreq_ctx);
return SNMP_VALIDATE_ERR(rc);
} /* _mfd_ocStbHostAnalogVideoTable_object_lookup
*/
I am assuming I should update the Table2 "ocStbHostAnalogVideoTable_row_prep()"
routine to have an "int" return value and then update the Table2
"_mfd_ocStbHostAnalogVideoTable_object_lookup()" routine (shown above) to add
the following "rc=" text to the "ocStbHostAnalogVideoTable_row_prep()" routine
call (shown below):
rc = ocStbHostAnalogVideoTable_row_prep(rowreq_ctx);
Is this all which is required to process a MFD_SKIP value returned from the
row_prep routine?
Need Help <[EMAIL PROTECTED]> wrote:
3) You indicate that the "Table2_row_prep()" routine will be called for each
row in Table1. This is fine, since I can check whether the current row
actually relates to Table2 easily by checking the "type" value defined in
"Table1". If the row is not related to Table2, then you indicate I should
return MFD_SKIP. Yes, this seems straightforward, however (and you probably
know I would be asking this), what changes must I make to the table interface
code of each of the secondary tables in order for them to handle the new
MFD_SKIP return value? Actually by "interface code" do you mean the
"x_interface.c" files need to be updated, or are you referring to some
other code file which would need to be updated?
-
Boardwalk for $500? In 2007? Ha!
Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.-
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Re: Expanding the "data_context" structure to include other Table fields
Referring to my oroblem outlined in (1) below ..
It seems the problem might be due to the fact that
Table2(ocStbHostAnalogVideoTable) seems to be initialized before
Table1(ocStbHostAVInterfaceTable), thus the cache from Table1 does not exist
yet and can not be used for Table2.
Is there a way to indicate which table should init first? I will keep looking
around.
Need Help <[EMAIL PROTECTED]> wrote: 1) I updated my code a bit but for some
reason the Table2_row_prep() routine is never called when I perform a
"snmpwalk" of Table2. Any ideas why "Table2_row_prep()" is not being called at
all (see the steps a-e below)?
Here are the two tables I am dealing with for testing:
Table1(ocStbHostAVInterfaceTable)
Table2(ocStbHostAnalogVideoTable)
a) I updated the Table1(ocStbHostAVInterfaceTable) data_context structure to
include the fields from Table2(ocStbHostAnalogVideoTable).
b) I updated Table2 "_ocStbHostAnalogVideoTable_container_init()" routine with
the following code only, which I believe should tell Table2 to use the same
cache as Table1(ocStbHostAVInterfaceTable):
if_ctx->cache =
netsnmp_cache_find_by_oid(ocStbHostAVInterfaceTable_oid,
ocStbHostAVInterfaceTable_oid_size);
if (NULL != if_ctx->cache) {
if_ctx->container = (netsnmp_container *) if_ctx->cache->magic;
return;
} else {
snmp_log(LOG_ERR, "error finding ocStbHostAVInterfaceTable cache\n");
}
c) I added printf statements to the "init_data", "container_init",
"container_load" and "row_prep" routines of Table1 and Table2 to verify the
flow through the code was correct when an SNMP request was performed.
d) When I start the SNMP agent the following flow is displayed. Does this
seem correct so far?
ENTER ocStbHostAnalogVideoTable_init_data()
EXIT ocStbHostAnalogVideoTable_init_data()
ENTER _ocStbHostAnalogVideoTable_container_init()
EXIT _ocStbHostAnalogVideoTable_container_init()
ENTER ocStbHostAVInterfaceTable_init_data()
EXIT ocStbHostAVInterfaceTable_init_data()
ENTER ocStbHostAVInterfaceTable_container_init()
EXIT ocStbHostAVInterfaceTable_container_init()
ENTER ocStbHostAVInterfaceTable_container_load()
EXIT ocStbHostAVInterfaceTable_container_load()
e) When I request a "snmpwalk" through Table1(ocStbHostAVInterfaceTable) then
all of the fields of Table1 seem to displayed appropriately, however, doing a
"snmpwalk" through Table2(ocStbHostAnalogVideoTable), returns nothing. I
simply get the Linux cursor back, without any error or anything. Actually,
none of my printf statements are displayed either, which means that the
Table2_row_prep() routine is not being called at all. Note: I realize the
"Table2_container_load()" routine is not being called (which is normal) since
Table2 is using the same cache as Table1. I actually commented out all of the
internal code in the "Table2_container_load()" routine, but I left the actual
routine visible. Basically, the routine simply does nothing now, it is just
empty.
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Re: Expanding the "data_context" structure to include other Table fields
Ok, I sent this email to you before I got your other reply. :>P Anyway, I did find a way to reverse the order of the init routines being called, but it just may be lucky I guess please confirm The file "agent/mibgroup/OC-STB-HOST-MIB.h" exists (which I needed to create manually based on our past discussions) so NetSNMP can determine which Tables to include during configure time. The file contents are as follows: config_require(OC-STB-HOST-MIB/ocStbHostAnalogVideoTable); config_require(OC-STB-HOST-MIB/ocStbHostAVInterfaceTable); Using the file described above resulted in Table2(ocStbHostAnalogVideoTable) being initialized before Table1(ocStbHostAVInterfaceTable). When I reversed the order of these tables (see below), then Table1 was initialized before Table2 (as desired) and I am now able to perform a "snmpwalk" through Table2 (oh yeah!). I see how the row_prep() routine is now being called for each row from Table1. I feel good right now . config_require(OC-STB-HOST-MIB/ocStbHostAVInterfaceTable); config_require(OC-STB-HOST-MIB/ocStbHostAnalogVideoTable); Anyway, does switching these two lines around truely control the order in which the tables are initialized? If not, then I guess I will need to do what you are recommending in your response email instead. Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 7 Jun 2007 09:50:24 -0700 (PDT) Need wrote: NH> Referring to my oroblem outlined in (1) below .. NH> NH> It seems the problem might be due to the fact that Table2(ocStbHostAnalogVideoTable) seems to be initialized before Table1(ocStbHostAVInterfaceTable), thus the cache from Table1 does not exist yet and can not be used for Table2. That's exactly what I just got through telling you. ;-) NH> Is there a way to indicate which table should init first? I will keep looking around. Nope. Check out the ifTable code. I think I just used a static var in table1 to indicate if it had initialized, and called table1 init from table2. - Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Expanding the "data_context" structure to include other Table fields
A) You stated there are other methods (instead of using "se_add_pair_to_slist" and "se_find_value_in_slist" routines) which can be used to remember index values. I assume "other methods" mean that I am free to implement any other way to remember index values if I want :>) ... or perhaps other methods already exist within NetSNMP? I asked this question, since it does seem silly to assign a "text string" to each index value like the "se_" routines mentioned above require in order to remember the index mappings. I might see if I can find another way without using text strings. Any advice? B) You state "Check out the container load function(s) for ifTable." . Well, this seems to complicated for me to understand just yet. I think I will simply regenerate Table1 during it's container_load() routine everytime since this would be easier for me right now. Perhaps in the future, updating this to not regenerate the full table everytime would be possible. C) Just wanted to confirm with you the following is true please confirm: The "_mfd_ocStbHostAnalogVideoTable_object_lookup()" routine calls the "ocStbHostAnalogVideoTable_row_prep()" routine and now it is possible for the "ocStbHostAnalogVideoTable_row_prep()" routine to return a MFD_SKIP value. This means the "_mfd_ocStbHostAnalogVideoTable_object_lookup()" routine can now return a MFD_SKIP value. I just wanted to confirm that this is ok and no additional code is required (somewhere else) to handle a MFD_SKIP value from being returned by the "_mfd_ocStbHostAnalogVideoTable_object_lookup()" routine. D) "the more questions you ask in a single message, to more likely I am to take longer to respond. I only have so many hours in the day!" I completely understand and immensely appreciate all the time and guidance you have provided me so far. Without this sort of assistance, I would not even come close to using SNMP for my company, especially after finding out I am dealing with tables which are related to other tables. I do apperciate your help immensely .. thanks to you (as well as David of course) ! - Choose the right car based on your needs. Check out Yahoo! Autos new Car Finder tool.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Expanding the "data_context" structure to include other Table fields
Ugh ... I just noticed something I think I am doing wrong: The Table2 data_context structure came configured with a "ProtectionStatus" field defined in it (since this is in my MIB). Knowing that Table2 is an extension of Table1 (and based on our past discussions on how to implement this type of table), I added the "ProtectionStatus" field defintion into Table1 data_context structure as well. Also, Table2 has been enhanced to use the same cache as defined by Table1. Now, when I "snmpwalk" through Table2, then the "Table2_row_prep()" routine is called and is providing a row_context structure as input. In this routine, I found that I am updating the "ProtectionStatus" field defined in the Table2 data_context structure instead of updating the one defined in the Table1 data_context structure. I think this is a mistake. I believe I want to update the "ProtectionStatus" field in Table1 data_context instead is this correct? If so, then how do I access the Table1 table so I can update the row data appropriately? I know the "rowreq_ctx->tbl_idx" value provided in the Table2_row_prep() routine tells me the row I am dealing with, but how do I get to Table1 to change the field data there? The other thing is that the "snmpwalk" of Table2 did display all rows showing the "ProtectionStatus" field value. Since the "ProtectionStatus" field was only populated in the Table2 data_context structure (ie: I never updated it in the Table1 data_context structure), then this means the "snmpwalk" is really walking through Table2 data and not really getting the data from Table1 like it should, so something still must be wrong with my set up. Actually, should the Table2 data_context structure include any fields at all? I would not think so, since all these fields have been added to Table1 data_context already. - Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
How to integrate NetSNMP into a working Linux environment?
Ok, my company would like me to start discussing how to incorporate NetSNMP into the company's build environment. I explained the following stuff: - Indicated "./configure", "make" and "make install" were required for NetSNMP - Indicated "snmp.conf" and "snmpd.conf" files exist to define stuff - Indicated certain environment variables could be used if desired - Indicated other stuff as well as much as I came across so far :>P During this discussion, the "build-production" people at my company informed me we can not perform the "configure" command as part of our "build process". Instead it would be necessary to understand exactly what the "configure" command (and I guess the "make" and "make install" commands as well) do "behind the scenes" so our build process and perform these exact steps ourselves. I was told we do not want to execute a script file with all of the required commands and options in it as well. Anyway, is this a common approach to integrating NetSNMP into a business application (ie: not using the standard setup commands/options as part of the command line or in a script file)? It scares me not to use the standard steps to get NetSNMP configured/running. Perhaps someone can explain to me whether this is weird or not. If so, then perhaps you can give me a quick overview as to how NetSNMP should "normally" be integrated in a build system. I understand no one knows how our build system works (neither do I), but any input into this topic would be greatly appreciated. Is it crazy to think we can perform everything that "./configure", "make" and "make install" does oursleves without using those commands? Perhaps we do not need many of the things these commands do to set up NetSNMP? I obviously had no answers for my company on this issue, so I am asking for help from people who have gone through this before. - Don't be flakey. Get Yahoo! Mail for Mobile and always stay connected to friends.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: How to integrate NetSNMP into a working Linux environment?
Are you recommending we hire a "NetSNMP consultant" to come in and explain what can be done to integrate NetSNMP into our environment? If so, I can mention it to my management, but I would assume they would first like to know what each command does internally to the files and NetSNMP environment to see if they can simply mirror what these commands do. Anyway, the "build" people here are experienced with integrating other applications into the build environment. They typically figure out what all the "setup" commands do internally and then add this "underlying" functionality into the build process. I would assume it might be hard to determine what each individual option does internally or how each option affects the system configuration for use by NetSNMP, but this is what I have been asked to try and figure out.Actually, to start, I am only interested in figuring out how hard it would be to mirror what "Configure", "make" and "make install" do .. Also, it would be nice to know whether it is a common practice to integrate NetSNMP into a build environment without using the "configure", "make", "make install", etc, etc.. commands which are normally used to get NetSNMP functioning properly. Steve Friedl <[EMAIL PROTECTED]> wrote: On Thu, Jun 07, 2007 at 12:32:00PM -0700, Need Help wrote: > Ok, my company would like me to start discussing how to incorporate NetSNMP > into the company's build environment. I explained the following stuff: Your company should probably retain a consultant experienced in these matters, because it's likely to rapidly wander outside the bounds of of the library itself, and what help you're likely to get here. Steve > - Indicated "./configure", "make" and "make install" were required for NetSNMP > - Indicated "snmp.conf" and "snmpd.conf" files exist to define stuff > - Indicated certain environment variables could be used if desired > - Indicated other stuff as well as much as I came across so far :>P > > During this discussion, the "build-production" people at my company informed > me we can not perform the "configure" command as part of our "build process". > Instead it would be necessary to understand exactly what the "configure" > command (and I guess the "make" and "make install" commands as well) do > "behind the scenes" so our build process and perform these exact steps > ourselves. I was told we do not want to execute a script file with all of > the required commands and options in it as well. > > Anyway, is this a common approach to integrating NetSNMP into a business > application (ie: not using the standard setup commands/options as part of the > command line or in a script file)? It scares me not to use the standard > steps to get NetSNMP configured/running. Perhaps someone can explain to me > whether this is weird or not. If so, then perhaps you can give me a quick > overview as to how NetSNMP should "normally" be integrated in a build system. > > I understand no one knows how our build system works (neither do I), but any > input into this topic would be greatly appreciated. > > Is it crazy to think we can perform everything that "./configure", "make" and > "make install" does oursleves without using those commands? Perhaps we do > not need many of the things these commands do to set up NetSNMP? > > I obviously had no answers for my company on this issue, so I am asking for > help from people who have gone through this before. > > > > > > > > - > Don't be flakey. Get Yahoo! Mail for Mobile and > always stay connected to friends. > - > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > ___ > Net-snmp-coders mailing list > Net-snmp-coders@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/net-snmp-coders -- Stephen J Friedl | Security Consultant | UNIX Wizard | +1 714 544-6561 www.unixwiz.net | Tustin, Calif. USA | Microsoft MVP | [EMAIL PROTECTED] - Don't be flakey. Get Yahoo! Mail for Mobile and always stay connected to friends.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Expanding the "data_context" structure to include other Table fields
Returning MFD_SKIP from the Table2_row_prep() routine results in the following error: Error in packet. Reason: (genError) A general failure occured I generated the first two rows using snmpwalk and then decided to return MFD_SKIP for the third row request, thinking that the row data would be skipped and that Table2_row_prep() for the 4th row would occur, but I got the above error instead and the snmpwalk stopped. Any ideas? Need Help <[EMAIL PROTECTED]> wrote:C) Just wanted to confirm with you the following is true please confirm: The "_mfd_ocStbHostAnalogVideoTable_object_lookup()" routine calls the "ocStbHostAnalogVideoTable_row_prep()" routine and now it is possible for the "ocStbHostAnalogVideoTable_row_prep()" routine to return a MFD_SKIP value. This means the "_mfd_ocStbHostAnalogVideoTable_object_lookup()" routine can now return a MFD_SKIP value. I just wanted to confirm that this is ok and no additional code is required (somewhere else) to handle a MFD_SKIP value from being returned by the "_mfd_ocStbHostAnalogVideoTable_object_lookup()" routine. - Now that's room service! Choose from over 150,000 hotels in 45,000 destinations on Yahoo! Travel to find your fit.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: How to integrate NetSNMP into a working Linux environment?
I am not knowledgeable in this area at all. I really can not comment on this. Based on the meeting we had, I was under the impression they would prefer not to use "configure" as part of the build sequence. Perhaps using "configure" outside of the build sequence to simply obtain changed files which could then be incorporated into the build sequence would be possible, if this is what you are recommending. I do not think it has anything to do with not trusted the build procedure, but has more to do with building our environment might not allow for a "configure" script to run and completely execute perhaps? I do not know. I am sure it has nothing to do with not trusting the build of "configure" though. Dave Shield <[EMAIL PROTECTED]> wrote: On 07/06/07, Need Help wrote: > Is it crazy to think we can perform everything that "./configure", "make" > and "make install" does oursleves without using those commands? Yes! You could perhaps set up the 'Makefile' and net-snmp-config.h files manually, but you'd need to run configure once first, to find out the appropriate settings. I suppose you could run "make" (and "make install") manually once, and capture the output. That output could then be used as a script to compile and install the software (having first been validated by your build production people). That might be acceptable to your company, but it feels like a lot of unnecessary work. If you don't trust the build procedure, why would you trust the code itself? How do they usually deal with installing open-source software? Dave - Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
RE: How to integrate NetSNMP into a working Linux environment?
Yes, and eventually it might come to that, but in the meantime, I am the only person which is assigned to handle the SNMP integration work.No oen is given time to do this task yet. We just want to start looking into what it would take, and I am the person who is trying to gather some data/ideas on how to make this happen. Eventually, the build people will be getting involved if required in the future. I still have to get NetSNMP functioning for our MIB first, before we try to integrate it into our environment. :>P Thanks for the information on this issue. Bruce Shaw <[EMAIL PROTECTED]> wrote: >I am not knowledgeable in this area at all. Then maybe we should be talking to someone who is. This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. - Be a better Heartthrob. Get better relationship answers from someone who knows. Yahoo! Answers - Check it out. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Expanding the "data_context" structure to include other Table fields
Here are the two tables I am dealing with again: Table1(ocStbHostAVInterfaceTable) Table2(ocStbHostAnalogVideoTable) I looked into the "ifXTable.h" file and saw how the "ifTable" data structures are being used. As a result I removed the following structure/definitions from Table2 ocStbHostAnalogVideoTable_registration ocStbHostAnalogVideoTable_data ocStbHostAnalogVideoTable_mib_index ocStbHostAnalogVideoTable_rowreq_ctx ocStbHostAnalogVideoTable_ref_rowreq_ctx . and added the following code to indicate to use Table1 structures: typedef ocStbHostAVInterfaceTable_registration ocStbHostAnalogVideoTable_registration; typedef ocStbHostAVInterfaceTable_data ocStbHostAnalogVideoTable_data; typedef ocStbHostAVInterfaceTable_mib_index ocStbHostAnalogVideoTable_mib_index; typedef ocStbHostAVInterfaceTable_rowreq_ctx ocStbHostAnalogVideoTable_rowreq_ctx; typedef ocStbHostAVInterfaceTable_ref_rowreq_ctx ocStbHostAnalogVideoTable_ref_rowreq_ctx; My problem now is that the code does not compile. I confirmed the compile errors are due to not being able to find the Table1 structure definitions (shown below). ocStbHostAVInterfaceTable_registration ocStbHostAVInterfaceTable_data ocStbHostAVInterfaceTable_mib_index ocStbHostAVInterfaceTable_rowreq_ctx ocStbHostAVInterfaceTable_ref_rowreq_ctx Of course, I made sure the Table1 header file (where these structures are defined) was included: #include "OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/ocStbHostAVInterfaceTable.h" Anyway, I know this might be a long shot, but do you think I am missing some other thing? I have been looking at the "ifTable.h" and "ifXTable.h" code as a guide to see if I am missing anything, but I can determine what it could be causing my compile errors. Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 7 Jun 2007 12:05:15 -0700 (PDT) Need wrote: NH> Ugh ... I just noticed something I think I am doing wrong: NH> Yep. Check out the ifXTable headers.. you'll see that it is using ifTable structures. - Got a little couch potato? Check out fun summer activities for kids.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Expanding the "data_context" structure to include other Table fields
Here is the compile errors: In file included from mibgroup/OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/ocStbHostAVInterfaceTable.h:44, from mibgroup/OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/ocStbHostAVInterfaceTable_data_access.c:17: .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable.h:72: error: syntax error before "ocStbHostAnalogVideoTable_registration" .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable.h:72: warning: data definition has no type or storage class .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable.h:73: error: syntax error before "ocStbHostAnalogVideoTable_data" .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable.h:73: warning: data definition has no type or storage class .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable.h:74: error: syntax error before "ocStbHostAnalogVideoTable_mib_index" .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable.h:74: warning: data definition has no type or storage class .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable.h:75: error: syntax error before "ocStbHostAnalogVideoTable_rowreq_ctx" .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable.h:75: warning: data definition has no type or storage class .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable.h:76: error: syntax error before "ocStbHostAnalogVideoTable_ref_rowreq_ctx" .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable.h:76: warning: data definition has no type or storage class Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 7 Jun 2007 13:33:51 -0700 (PDT) Need wrote: NH> Returning MFD_SKIP from the Table2_row_prep() routine results in the following error: NH> NH> Error in packet. NH> Reason: (genError) A general failure occured NH> NH> NH> I generated the first two rows using snmpwalk and then decided to return MFD_SKIP for the third row request, thinking that the row data would be skipped and that Table2_row_prep() for the 4th row would occur, but I got the above error instead and the snmpwalk stopped. NH> NH> Any ideas? Yeah, you need some code for the interface file.. I'll try to take a look soon, but in the meantime you can poke around in the interface.c, look how skip is handled elsewhere, and try that. It might be that easy, but there might be some side effects to deal with as well. - 8:00? 8:25? 8:40? Find a flick in no time with theYahoo! Search movie showtime shortcut.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Expanding the "data_context" structure to include other Table fields
I meant to attach the header files for Table1 and Table2. here they are ** If you search for "TODD TEST" you will see all the changes I have made. Need Help <[EMAIL PROTECTED]> wrote: Here are the two tables I am dealing with again: Table1(ocStbHostAVInterfaceTable) Table2(ocStbHostAnalogVideoTable) I looked into the "ifXTable.h" file and saw how the "ifTable" data structures are being used. As a result I removed the following structure/definitions from Table2 ocStbHostAnalogVideoTable_registration ocStbHostAnalogVideoTable_data ocStbHostAnalogVideoTable_mib_index ocStbHostAnalogVideoTable_rowreq_ctx ocStbHostAnalogVideoTable_ref_rowreq_ctx . and added the following code to indicate to use Table1 structures: typedef ocStbHostAVInterfaceTable_registration ocStbHostAnalogVideoTable_registration; typedef ocStbHostAVInterfaceTable_data ocStbHostAnalogVideoTable_data; typedef ocStbHostAVInterfaceTable_mib_index ocStbHostAnalogVideoTable_mib_index; typedef ocStbHostAVInterfaceTable_rowreq_ctx ocStbHostAnalogVideoTable_rowreq_ctx; typedef ocStbHostAVInterfaceTable_ref_rowreq_ctx ocStbHostAnalogVideoTable_ref_rowreq_ctx; My problem now is that the code does not compile. I confirmed the compile errors are due to not being able to find the Table1 structure definitions (shown below). ocStbHostAVInterfaceTable_registration ocStbHostAVInterfaceTable_data ocStbHostAVInterfaceTable_mib_index ocStbHostAVInterfaceTable_rowreq_ctx ocStbHostAVInterfaceTable_ref_rowreq_ctx Of course, I made sure the Table1 header file (where these structures are defined) was included: #include "OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/ocStbHostAVInterfaceTable.h" Anyway, I know this might be a long shot, but do you think I am missing some other thing? I have been looking at the "ifTable.h" and "ifXTable.h" code as a guide to see if I am missing anything, but I can determine what it could be causing my compile errors. Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 7 Jun 2007 12:05:15 -0700 (PDT) Need wrote: NH> Ugh ... I just noticed something I think I am doing wrong: NH> Yep. Check out the ifXTable headers.. you'll see that it is using ifTable structures. - Got a little couch potato? Check out fun summer activities for kids.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders - Get the free Yahoo! toolbar and rest assured with the added security of spyware protection. ocStbHostAVInterfaceTable.h Description: 2068711153-ocStbHostAVInterfaceTable.h ocStbHostAnalogVideoTable.h Description: 1363604423-ocStbHostAnalogVideoTable.h - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Expanding the "data_context" structure to include other Table fields
I might have figured this out .. do not spend your time on this yet thanks Need Help <[EMAIL PROTECTED]> wrote: Here are the two tables I am dealing with again: Table1(ocStbHostAVInterfaceTable) Table2(ocStbHostAnalogVideoTable) I looked into the "ifXTable.h" file and saw how the "ifTable" data structures are being used. As a result I removed the following structure/definitions from Table2 ocStbHostAnalogVideoTable_registration ocStbHostAnalogVideoTable_data ocStbHostAnalogVideoTable_mib_index ocStbHostAnalogVideoTable_rowreq_ctx ocStbHostAnalogVideoTable_ref_rowreq_ctx . and added the following code to indicate to use Table1 structures: typedef ocStbHostAVInterfaceTable_registration ocStbHostAnalogVideoTable_registration; typedef ocStbHostAVInterfaceTable_data ocStbHostAnalogVideoTable_data; typedef ocStbHostAVInterfaceTable_mib_index ocStbHostAnalogVideoTable_mib_index; typedef ocStbHostAVInterfaceTable_rowreq_ctx ocStbHostAnalogVideoTable_rowreq_ctx; typedef ocStbHostAVInterfaceTable_ref_rowreq_ctx ocStbHostAnalogVideoTable_ref_rowreq_ctx; My problem now is that the code does not compile. I confirmed the compile errors are due to not being able to find the Table1 structure definitions (shown below). ocStbHostAVInterfaceTable_registration ocStbHostAVInterfaceTable_data ocStbHostAVInterfaceTable_mib_index ocStbHostAVInterfaceTable_rowreq_ctx ocStbHostAVInterfaceTable_ref_rowreq_ctx Of course, I made sure the Table1 header file (where these structures are defined) was included: #include "OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/ocStbHostAVInterfaceTable.h" Anyway, I know this might be a long shot, but do you think I am missing some other thing? I have been looking at the "ifTable.h" and "ifXTable.h" code as a guide to see if I am missing anything, but I can determine what it could be causing my compile errors. Robert Story <[EMAIL PROTECTED]> wrote: On Thu, 7 Jun 2007 12:05:15 -0700 (PDT) Need wrote: NH> Ugh ... I just noticed something I think I am doing wrong: NH> Yep. Check out the ifXTable headers.. you'll see that it is using ifTable structures. - Got a little couch potato? Check out fun summer activities for kids.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders - Don't get soaked. Take a quick peak at the forecast with theYahoo! Search weather shortcut.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Expanding the "data_context" structure to include other Table fields
FOUND IT My problem was caused by having Table1 try to #include the header file from Table2 while Table2 had code to #include the header file from Table1. Things were getting screwy. I fixed this and it now compiles but I have a question. 1) Table2 included the Table1 header file so it could share the data structures defined in Table1. This is required based on how the ifTable/ifXTable share the data structures, so this seemed fine. Based on previous discussions, my goal was to update the data_context of Table1 to include a "union" of all the required "extended table" data structures since they are mutually exclusive to each other. Since Table2 already had all of it's data fields defined in one data_context structure, I thought I could simply have Table1 "#include" the header from Table2 and use this structure inside the Table1 data_context "union" definition. I then figured out I could not compile since both tables were trying to include each other's header files and this caused some problems. Anyway, I looked how ifTable/ifXTable handled this scenario and I saw that the ifTable did "not" include the header file from the ifXTable, but instead all of the fields in the ifXTable were copied into the ifTable data_context directly. I decided I could not simply copy all of the fields from my Table2 data_context into the Table1 data_context since I wanted to use a "union" of each table, so I needed to keep all the table data fields defined within their own structure. Using structures within the "union" definition allows me to keep each table mutually exclusive to each other easily. Anyway, what I ended up doing was simply moving the Table2 data_context structure definition into the header file of Table1 (I also renamed this data structure so the name did not conflict). Everything compiles now, but I have a question. Knowing that I have six tables which are extensions of Table1, then I would need to copy all of the data_context structures from these six extension tables into the Table1 header file to allow the "union" to work. Is there a better way to go about this? I mean, should Table1 header file include all data_context structure definitions from all extension tables? 2) Looking at how the ifTable/ifXTable code is implemented, I believe I do not need the following routines in my Table2 "interface.c" file. Would you please let me know if you agree that I can delete the following routines (also if you think there are more, then let me know): Table2_allocate_rowreq_ctx() Table2_release_rowreq_ctx() _cache_load() _cache_free() _container_item_free() _container_free() 3) I also decided I needed to update the _mfd_Table2_post_request() routine in Table2 to ... replace: Table2_release_rowreq_ctx(rowreq_ctx); with: Table1_release_rowreq_ctx(rowreq_ctx); Does this seem correct? Need Help <[EMAIL PROTECTED]> wrote: Here are the two tables I am dealing with again: Table1(ocStbHostAVInterfaceTable) Table2(ocStbHostAnalogVideoTable) I looked into the "ifXTable.h" file and saw how the "ifTable" data structures are being used. As a result I removed the following structure/definitions from Table2 ocStbHostAnalogVideoTable_registration ocStbHostAnalogVideoTable_data ocStbHostAnalogVideoTable_mib_index ocStbHostAnalogVideoTable_rowreq_ctx ocStbHostAnalogVideoTable_ref_rowreq_ctx . and added the following code to indicate to use Table1 structures: typedef ocStbHostAVInterfaceTable_registration ocStbHostAnalogVideoTable_registration; typedef ocStbHostAVInterfaceTable_data ocStbHostAnalogVideoTable_data; typedef ocStbHostAVInterfaceTable_mib_index ocStbHostAnalogVideoTable_mib_index; typedef ocStbHostAVInterfaceTable_rowreq_ctx ocStbHostAnalogVideoTable_rowreq_ctx; typedef ocStbHostAVInterfaceTable_ref_rowreq_ctx ocStbHostAnalogVideoTable_ref_rowreq_ctx; My problem now is that the code does not compile. I confirmed the compile errors are due to not being able to find the Table1 structure definitions (shown below). ocStbHostAVInterfaceTable_registration ocStbHostAVInterfaceTable_data ocStbHostAVInterfaceTable_mib_index ocStbHostAVInterfaceTable_rowreq_ctx ocStbHostAVInterfaceTable_ref_rowreq_ctx Of course, I made sure the Table1 header file (where these structures are defined) was included: #include "OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/ocStbHostAVInterfaceTable.h" Anyway, I know this might be a long shot, but do you think I am missing some other thing? I have been looking at the "ifTable.h" and "ifXTable.h" code as a guide to see if I am missing anything, but I can determine what it could be causing my compile errors. Rober
row_prep() returning MFD_SKIP results in error
It seems I have successfully been able to have Table1(ocStbHostAVInterfaceTable) and Table2(ocStbHostAnalogVideoTable) share the same container and can know "snmpwalk" through each table. One remaining problem is not being able to return a MFD_SKIP value from the Table2_row_prep() routine. When I return a MFD_SKIP from this routine, the following error is produced and the snmpwalk request stops completely. Error in packet. Reason: (genError) A general failure occured I tried looking through the Table2_interface.c file but I can not figure out what is going on and how a MFD_SKIP return code is handled. Will you please help me figure out how to skip certain rows in my Table2_row_prep() routine properly? - You snooze, you lose. Get messages ASAP with AutoCheck in the all-new Yahoo! Mail Beta. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Table2 can not use an Enum value defined in Table1
I have am using the following tables which I generated using the MfD
configuration file:
Table1(ocStbHostAVInterfaceTable)
Table2(ocStbHostAnalogVideoTable)
I added some #define enums to the "ocStbHostAVInterfaceTable_enums.h" Table1
file and wanted to use these enum values in the Table2_row_prep() routine to
help me determine if I am processing the correct row of the table or not.
Of course, I added the following #include statement into the
ocStbHostAnalogVideoTable_data_access.c file (where the Table2_row_prep()
routine is located) to include the new enums I defined in the Table1 enum file.
#include
"OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/ocStbHostAVInterfaceTable_enums.h"
In Table2_row_prep() routine I have the following code:
if (rowreq_ctx->data.AVInterfaceType == AV_IFACE_TYPE_BB_VIDEO_IN)
{
return MFD_SKIP;
}
. and this results in the following compile error:
mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable_data_access.c:
In function `ocStbHostAnalogVideoTable_row_prep':
mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable_data_access.c:420:
error: syntax error before '=' token
make[1]: ***
[mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ocStbHostAnalogVideoTable_data_access.lo]
Error 1
make[1]: Leaving directory `/export/home/rosent1/snmp/net-snmp-5.4/agent'
make: *** [subdirs] Error 1
"Line 420" is the line in which I am checking the "AV_IFACE_TYPE_BB_VIDEO_IN"
enum value. If I replace the "AV_IFACE_TYPE_BB_VIDEO_IN" enum value with a
"5", then everything compiles fine.
Any idea why Table2 can not use an enum value defined in the Table1 enum.h file?
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FIXED: (Re Table2 can not use an Enum value defined in Table1)
Figured this one out . please disregard ... PS: Yes, I am stupid today - Choose the right car based on your needs. Check out Yahoo! Autos new Car Finder tool.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
How can I perform a "complete" re-make of everything?
I tried executing a "make clean" but that does not get rid of all the ".lo" and ".o" files I have in the MIB directories. Is there a magic command which can be entered which will re-make the entire NetSNMP build? - Pinpoint customers who are looking for what you sell. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Why does Table2_row_prep() get called when walking through Table1
I have the following two tables: Table1(ocStbHostAVInterfaceTable) Table2(ocStbHostAnalogVideoTable) - extension of Table1 Note: Table2 is sharing the same container as Table1 I noticed when I perform a "snmpwalk" of Table1, then all the data is displayed correctly and then "one" call is made to Table2_row_prep() with row index = 1. Is this normal? I guess it does not hurt anything, however, I was just wondering if this should be occurring? - Get the Yahoo! toolbar and be alerted to new email wherever you're surfing. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Why does Table2_row_prep() get called when walking through Table1
Ok, then this means when a "snmpwalk" command for Table1 occurs then I will be populating "one row" of data from Table2 everytime, since I have code in the Table2_row_prep() routine. I just wanted to make sure it was not a problem. Thanks for clarifying. Dave Shield <[EMAIL PROTECTED]> wrote: On 12/06/07, Need Help wrote: > I noticed when I perform a "snmpwalk" of Table1, then all the data is > displayed correctly and then "one" call is made to Table2_row_prep() with > row index = 1. > > Is this normal? Yes. Remember that the walk doesn't know when it's reached the end of the table. It simply keeps asking for the "next value". It's only when that next value is no longer relevant to the requested table, that it knows it can stop. But it needs to retrieve that final "irrelevant" value before it can tell this, which means that the agent must supply it. Assuming the two tables are immediately next to each other, that means that the agent will start querying the second table, before the snmpwalk command can stop. Dave - Park yourself in front of a world of choices in alternative vehicles. Visit the Yahoo! Auto Green Center.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Replace SNMP commands with ones which read the ".conf" file settings
When starting out learning about NetSNMP, I installed everything into the following private directory location for testing /export/home/myname/snmp/usr/local/ I updated the "snmpd.conf" and "snmp.conf" files accordingly to include MIB information, etc but I had trouble with the "MIB files" being located when performing "snmpwalk", "snmpget", etc.. commands. Turns out the problem was that I was using the wrong "snmpwalk", 'snmpget" command executable files. I was using the "/usr/local/bin/snmp" commands instead of the NetSNMP "/export/home/myname/snmp/usr/local/bin/snmp" commands. I was told the "/export/home/myname/snmp/usr/local/bin/snmp" commands were required since those commands utilized the "snmpd.conf" and "snmp.conf" file information, while the "/usr/local/bin/snmp" commands did not. Questions: 1) When I integrate all of this NetSNMP code into my environment, I was going to install it into the default "/usr/local/" directory which would result in the existing "snmpwalk", "snmpget", etc... commands being overwritten with the new versions of these commands. correct? 2) Does anyone know if replacing the existing SNMP commands, etc.. with the new versions of the NetSNMP commands which come with NetSNMP-5.4 would cause me any problems? I want to make sure the newer versions of the NetSNMP commands (which read "conf" files) can replace the older SNMP commands (which I do not think read "conf" files ...??) without causing problems. - Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Does row_prep() routine utilize cache data?
I have my cache is set to be 60 seconds. When I issue a "snmpget" request multiple times for the same data field (just playing around with snmp) within a table, I notice the row_prep() routine is called for each request. Since I have code in the row_prep() routine to load the row data, then this means I am reloading the row data everytime the "snmpget" request is issued. I was wondering whether the row_prep() routine should be utilizing the cache data in that the row_prep() routine should only be called once (for the particular row) within the 60 seconds until the cache times out. This means that subsequent "snmpget" requests (for the particular row) will not result in the row_prep() routine being called. Perhaps the cache is just used for the overall table "container" and not utilized for specfic rows? I am just curious . - Park yourself in front of a world of choices in alternative vehicles. Visit the Yahoo! Auto Green Center.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Tutorial question: "Writing a SubAgent"
I am interested in having a subagent handle all requests for my particular MIB. As a result, I am reading the tutorial entitled "Writing a SubAgent' located here: http://www.net-snmp.org/wiki/index.php/TUT:Writing_a_Subagent I did not think "auto-building" the subagent using the "net-snmp-config --compile-subagent" option was the most common way of creating a subagent (am I wrong?) so I decided to read the "Instrumenting your own code with agentx subagent support" section of this tutorial. I downloaded the required files (as recommended): Makefile NET-SNMP-TUTORIAL-MIB.txt example-demon.c nstAgentSubagentObject.c nstAgentSubagentObject.h I was not sure where to put these files, so I created the following directory and placed them into this location: .../agent/mibgroup/nstAgentSubagentObject/ I performed the "make example-demon" command successfully and updated my "snmpd.conf" file to include the "master agentx" line as well. 1) I then tried to fire up the snmpd master agent but it will not start. I am trying to start it using the following command: /export/home/myname/snmp/usr/local/sbin/snmpd -f & If I remove the "master agentx" line from the "snmpd.conf" file then it will start, but this can not be done since I need to inform master agent that subagents will be registering with it. Of course, putting the "master agentx" line back in results in the "snmpd" master agent failing to start again. Any idea what I am doing wrong? Why I can not start the master agent when the "master agentx" line is included? 2) I am not sure how the "example-demon" subagent is actually related to the "NET-SNMP-TUTORIAL-MIB.txt" MIB file at all. I am assuming this tutorial is supposedly showing me how a subagent (ie: example-demon) can be created to handle all snmp requests for a particular MIB file (ie: the "NET-SNMP-TUTORIAL-MIB.txt" MIB file), but I do not see how the subagent is ever associated with a MIB file at all. If my assumptions are correct, then how does a subagent become associated with a MIB file? - Looking for a deal? Find great prices on flights and hotels with Yahoo! FareChase.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Tutorial question: "Writing a SubAgent"
1) Here is the output I get when using the -Le option: [EMAIL PROTECTED] net-snmp]# /export/home/myname/snmp/usr/local/sbin/snmpd -f -Le & [1] 27644 [EMAIL PROTECTED] net-snmp]# Turning on AgentX master support. Error: Couldn't open a master agentx socket to listen on (): Obviously I am not configured correctly what am I missing? 2) Currently, I am using the snmpd master agent to process my "OC-STB-HOST-MIB" MIBfile. I am using the MfD configuration framework and have multiple directories where my code is located: .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAnalogVideoTable/ .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostAVInterfaceTable/ .../agent/mibgroup/OC-STB-HOST-MIB/ocStbHostComponentVideoTable/ etc.. etc.. ** Each directory represents a "Table" defined in the MIB. Now, I would like to create a subagent to handle this MIB file (instead of the snmpd master agent) and I am not sure how to go about doing this. I have multiple directories which contain code for this MIB and I am not sure how to create the subagent. Must I create an "example-demon.c" similiar type file for each of the tables and edit it was specific MIB information somehow? Basically, I am confused as to what the tutorial is showing me. In the tutorial, I simply perform a "make" on a "example-demon.c" file and suddenly I have a subagent which can be executed by issuing the "example-demon" command. I do not understand what table files I need to perform a "make" on to suddenly get a useable subagent for my own code. Hopefully I do not have to create a subagent for each table in my MIB correct? Any insight here would be appreciated. I clearly do not understand how to relate what the tutorial is showing me to my own MIB code in order to produce a subagent which can handle my MIB. Dave Shield <[EMAIL PROTECTED]> wrote: On 13/06/07, Need Help wrote: > I was not sure where to put these files It doesn't matter. The whole point of a standalone subagent is that it's standalone. It doesn't depend on the rest of the source tree. As long as you've got the Net-SNMP suite installed, the Makefile will pick up the headers and libraries from their installed locations. > 1) I then tried to fire up the snmpd master agent but it will not start. I > am trying to start it using the following command: > > /export/home/myname/snmp/usr/local/sbin/snmpd -f & Does it produce any error messages? Try running it as /export/home/myname/snmp/usr/local/sbin/snmpd -f -Le What does it display? > 2) I am not sure how the "example-demon" subagent is actually related to the > "NET-SNMP-TUTORIAL-MIB.txt" MIB file at all. The file 'example-demon.c' is the framework for an AgentX subagent. This is basically equivalent to the framework that net-snmp-config --compile-subagent will generate. This is then linked together with the code from 'nstAgentSubagentObject.c', which is where the NET-SNMP-TUTORIAL-MIB.txt stuff is implemented. These two code files are compiled and linked together to produce the binary 'example-demon' > If my assumptions are correct, then how does a subagent become associated > with a MIB file? Because there are two (or more) code files that are compiled into the example-demon binary - not just example-demon.c. Try watching what happens when you run "make" Dave - Never miss an email again! Yahoo! Toolbar alerts you the instant new Mail arrives. Check it out.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Tutorial question: "Writing a SubAgent"
Yes, slowing down is probably best :>P I am using NetSNMP v5.4 Executing the "ls -l /var/agentx" command results in the following error: ls: /var/agentx: No such file or directory My "snmpd.conf" file has the following two lines only: master agentx rocommunity mycommunity_ro My "snmp.conf" file has the following two lines only: mibdirs +/export/home/myname/snmp/usr/local/share/snmp/mibs mibs +OC-STB-HOST-MIB:DOCS-IF-MIB:CLAB-DEF-MIB:DOCS-IETF-BPI2-MIB Here is the "configure" command I am using: ./configure \ --prefix=/export/home/myname/snmp/usr/local \ --srcdir=/export/home/myname/snmp/net-snmp \ --enable-embedded-perl \ --enable-shared \ --with-mib-modules="OC-STB-HOST-MIB" Dave Shield <[EMAIL PROTECTED]> wrote: On 13/06/07, Need Help wrote: > 1) Here is the output I get when using the -Le option: > > [EMAIL PROTECTED] net-snmp]# > /export/home/myname/snmp/usr/local/sbin/snmpd -f -Le & > [1] 27644 > [EMAIL PROTECTED] net-snmp]# Turning on AgentX master support. > Error: Couldn't open a master agentx socket to listen on (): > > > Obviously I am not configured correctly what am I missing? I don't know. How are you configured at the moment? What's in your snmpd.conf file? What does 'ls -l /var/agentx' show? (both before and after starting the agent) Which version of the software are you working with? > 2) Currently, I am using the snmpd master agent to process my >"OC-STB-HOST-MIB" MIBfile. Can I suggest that you slow down a bit! It's probably sensible to concentrate on one problem at a time. If you can't get a single subagent to work, then there's not much point in racing ahead with looking at building ever more complicated configurations. One step at a time Dave - Sucker-punch spam with award-winning protection. Try the free Yahoo! Mail Beta.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Tutorial question: "Writing a SubAgent"
Once I created the /var/agentx directory manually then everything works as the tutorial indicates. Unfortunately, I do not have any idea how to get my MfD code to be used by a subagent. Not really sure what I need to do here. I did see when the "make example-demon" command executed then the it generates the following files: example-demon.o nstAgentSubagentObject.o however, I do not understand how the subagent informs the snmpd master agent that all SNMP request relating to the NET-SNMP-TUTORIAL-MIB should be sent to the subagent instead of being processed by the snmpd master agent. Perhaps you can explain when I am looking at when I look through the nstAgentSubagentObject.c/.h and example-demon.c files? Dave Shield <[EMAIL PROTECTED]> wrote: On 13/06/07, Need Help wrote: > I am using NetSNMP v5.4 > > Executing the "ls -l /var/agentx" command results in the following error: > > ls: /var/agentx: No such file or directory Are you running the snmpd agent as root? Try creating the /var/agentx directory before starting the agent. What output do you get then? Dave - Got a little couch potato? Check out fun summer activities for kids.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Tutorial question: "Writing a SubAgent"
1) Yes, when I perform "make example-demon" then the following is produced: gcc -I. `net-snmp-config --cflags` -c -o example-demon.o example-demon.c gcc -I. `net-snmp-config --cflags` -c -o nstAgentSubagentObject.o nstAgentSubagentObject.c gcc -o example-demon example-demon.o nstAgentSubagentObject.o `net-snmp-config --agent-libs` I can then perform a "snmpget" request nd the desired data is displayed.. 2) Ok, so what would my next step be to have my complete MIB tree processed by a subagent? Would I need to copy the "example-demon.c" file, rename it to something like "myOcStbHostMib-demon.c" and edit it with my specific information. I am confused as to where the "example-demon.c" file came from. Was this file created for the sole purpose of showing an example of a subagent or must I copy this file and tweak it for use for my specific MIB? Also, it seems I would need to create a routine similiar to the "init_nstAgentSubagentObject()" routine which can be called by the "myOcStbHostMib-demon" subagent? DO I create a completely new ".c" file for this and place it somewhere, or do I simply call the "netsnmp_register_int_instance()" routine from within one of my existing MfD code routines somewhere? I am obviously not clear how to take my existing MfD code and combine it with some "example.c" and "nstAgentSubagentObject.c" code and get it working. Also will by existing container_load() and row_prep() routines be called as normal to handle the snmp requests from the subagent or must I have to rewrite the code somehow? I am confused how this all fits together. What MfD code areas need to change to do this? Dave Shield <[EMAIL PROTECTED]> wrote: On 13/06/07, Need Help wrote: > I did see when the "make example-demon" command executed then the it > generates the following files: > > example-demon.o > nstAgentSubagentObject.o You should see the following three commands: cc -c -o example-demon.o example-demon.c cc -c -o nstAgentSubagentObject.o nstAgentSubagentObject.c cc -o example-demon example-demon.o nstAgentSubagentObject.o (with the various compilation flags, etc) Is that what you see or not? > however, I do not understand how the subagent informs the snmpd master > agent that all SNMP request relating to the NET-SNMP-TUTORIAL-MIB should be > sent to the subagent instead of being processed by the snmpd master agent. The 'nstAgentSubagentObject' module initialisation code will register with the local subagent framework (example-demon.o) to inform it of the MIB modules it wishes to handle (i.e. an OID subtree). This is a standard part of the Net-SNMP agent processing. In this case, this is the netsnmp_register_int_instance() call. The subagent framework makes a note of this OID registration locally (so it knows which module to use), and also sends an AgentX registration request to the master agent. This is part of the standard AgentX protocol. The AgentX processing module of the master agent receives this AgentX registration request, and registers this OID subtree with the main master agent framework. Again, this is a normal part of the Net-SNMP agent processing. The main agent doesn't actually care that this is an AgentX registration - it simply knows to send requests to this particular handler (which happens to be the AgentX module). When a GET (or GETNEXT) request comes in, the master agent looks up the OID in its local registry, and passes the request to the appropriate module. The AgentX module then forwards this request to the subagent, which looks up the OID in *its* local registry, and passes the request on to the appropriate local module (nstAgentSubagentObject). In this particular case, there isn't actually any specific code needed to implement the object (since it's using the 'int_instance' helper). But in your MfD examples, this would be the xxx_handler() routine. Try it - see whether it works or not. Dave - Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Tutorial question: "Writing a SubAgent"
Also, I noticed that the "snmpset" request is not working. I previously performed the "snmpget" and that worked.I have the snmpd master agent running and I have the "example-demon" subagent running. Here is the output which is displayed when performing the snmpget and snmpset requests as stated in the tutorial: snmpget: /export/home/rosent1/snmp/usr/local/bin/snmpget -v 1 -c mycommunity_ro localhost NET-SNMP-TUTORIAL-MIB::nstAgentSubagentObject.0 NET-SNMP-TUTORIAL-MIB::nstAgentSubagentObject.0 = INTEGER: 2 snmpset: /export/home/rosent1/snmp/usr/local/bin/snmpset -v 1 -c mycommunity_ro localhost NET-SNMP-TUTORIAL-MIB::nstAgentSubagentObject.0 = 5 Error in packet. Reason: (noSuchName) There is no such variable name in this MIB. Any idea why the snmpset fails? Need Help <[EMAIL PROTECTED]> wrote: 1) Yes, when I perform "make example-demon" then the following is produced: gcc -I. `net-snmp-config --cflags` -c -o example-demon.o example-demon.c gcc -I. `net-snmp-config --cflags` -c -o nstAgentSubagentObject.o nstAgentSubagentObject.c gcc -o example-demon example-demon.o nstAgentSubagentObject.o `net-snmp-config --agent-libs` I can then perform a "snmpget" request nd the desired data is displayed.. 2) Ok, so what would my next step be to have my complete MIB tree processed by a subagent? Would I need to copy the "example-demon.c" file, rename it to something like "myOcStbHostMib-demon.c" and edit it with my specific information. I am confused as to where the "example-demon.c" file came from. Was this file created for the sole purpose of showing an example of a subagent or must I copy this file and tweak it for use for my specific MIB? Also, it seems I would need to create a routine similiar to the "init_nstAgentSubagentObject()" routine which can be called by the "myOcStbHostMib-demon" subagent? DO I create a completely new ".c" file for this and place it somewhere, or do I simply call the "netsnmp_register_int_instance()" routine from within one of my existing MfD code routines somewhere? I am obviously not clear how to take my existing MfD code and combine it with some "example.c" and "nstAgentSubagentObject.c" code and get it working. Also will by existing container_load() and row_prep() routines be called as normal to handle the snmp requests from the subagent or must I have to rewrite the code somehow? I am confused how this all fits together. What MfD code areas need to change to do this? Dave Shield <[EMAIL PROTECTED]> wrote: On 13/06/07, Need Help wrote: > I did see when the "make example-demon" command executed then the it > generates the following files: > > example-demon.o > nstAgentSubagentObject.o You should see the following three commands: cc -c -o example-demon.o example-demon.c cc -c -o nstAgentSubagentObject.o nstAgentSubagentObject.c cc -o example-demon example-demon.o nstAgentSubagentObject.o (with the various compilation flags, etc) Is that what you see or not? > however, I do not understand how the subagent informs the snmpd master > agent that all SNMP request relating to the NET-SNMP-TUTORIAL-MIB should be > sent to the subagent instead of being processed by the snmpd master agent. The 'nstAgentSubagentObject' module initialisation code will register with the local subagent framework (example-demon.o) to inform it of the MIB modules it wishes to handle (i.e. an OID subtree). This is a standard part of the Net-SNMP agent processing. In this case, this is the netsnmp_register_int_instance() call. The subagent framework makes a note of this OID registration locally (so it knows which module to use), and also sends an AgentX registration request to the master agent. This is part of the standard AgentX protocol. The AgentX processing module of the master agent receives this AgentX registration request, and registers this OID subtree with the main master agent framework. Again, this is a normal part of the Net-SNMP agent processing. The main agent doesn't actually care that this is an AgentX registration - it simply knows to send requests to this particular handler (which happens to be the AgentX module). When a GET (or GETNEXT) request comes in, the master agent looks up the OID in its local registry, and passes the request to the appropriate module. The AgentX module then forwards this request to the subagent, which looks up the OID in *its* local registry, and passes the request on to the appropriate local module (nstAgentSubagentObject). In this particular case, there isn't actually any specific code needed to implement the object (since it's using the 'int_instance' helper). But in your MfD examples, this would be the
Fwd: Re: Tutorial question: "Writing a SubAgent"
Geez, that never occurred to me .. :>P I never really looked into the security stuff yet, just set it to something as a default. Makes sense now ... thanks. Dave Shield <[EMAIL PROTECTED]> wrote: Date: Thu, 14 Jun 2007 14:24:18 +0100 From: "Dave Shield" <[EMAIL PROTECTED]> To: "Need Help" <[EMAIL PROTECTED]> Subject: Re: Tutorial question: "Writing a SubAgent" CC: net-snmp-coders@lists.sourceforge.net On 14/06/07, Need Help wrote: > snmpset -v 1 -c mycommunity_ro . You are using a community called "something_ro". What do you guess that "ro" probably stands for? "Read-Write" or "Read-Only"? Dave - Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Tutorial question: "Writing a SubAgent"
be best. Does this make sense? 6) To compile and link the "example-demon.c" file with all my other MIB files, which file do I need to update? Perhaps it would be the "/agent/mibgroup/Makefile" file . perhaps other files as well? Also, what do I need to change in there to get it compiling and linking together? ** Yes, I am new to the Linux environment . so I do not want to screw anything up. 7) Just to confirm for myself ... I only need ONE "example-demon.c" type file to exist and this file will call an "init" function for each one of my Tables and Scalars defined in my MIB? Is this correct? * THANK YOU for all your help and patience. I am learning tons and really appreciate your effort. Dave Shield <[EMAIL PROTECTED]> wrote: On 14/06/07, Need Help wrote: > 2) Ok, so what would my next step be to have my complete MIB tree processed > by a subagent? Compile your MIB module code, together with the 'example-demon.c' file (or equivalent), and link them all together. > Would I need to copy the "example-demon.c" file, rename it to something like > "myOcStbHostMib-demon.c" and edit it with my specific information. You don't have to rename it (unless you specifically want to). But basically, yes. >I am > confused as to where the "example-demon.c" file came from. Was this file > created for the sole purpose of showing an example of a subagent Yes. > or must I copy this file and tweak it for use for my specific MIB? Yes. Either this file, or the equivalent code file generated by the MfD framework. > Also, it seems I would need to create a routine similiar to the > "init_nstAgentSubagentObject()" routine which can be called by the > "myOcStbHostMib-demon" subagent? You'll need an init_xxx() routine for each MIB module, yes. > DO I create a completely new ".c" file for > this and place it somewhere, or do I simply call the > "netsnmp_register_int_instance()" routine from within one > of my existing MfD code routines somewhere? This should already be generated as part of the MfD code. Just add that call to the example-demon.c (or equivalent). > I am obviously not clear how to take my existing MfD code and combine it > with some "example.c" and "nstAgentSubagentObject.c" code and get it > working. Replace the 'init_nstAgentSubagentObject()' call in example-demon.c, with calls to the init routine(s) from your MfD modules. Replace references to the nstAgentSubagentObject.X files in the Makefile with the corresponding file(s) from your MfD modules. Or you could use the Makefile/subagent code generated by mib2c/MfD and tweak them in the same way. The bottom line is that you need to compile all of the MIB code files that you're working with, and call all of the init_xxx() routines from the subagent driver. > Also will by existing container_load() and row_prep() routines be called as > normal to handle the snmp requests from the subagent or must I have to > rewrite the code somehow? I am confused how this all fits together. What > MfD code areas need to change to do this? None. As long as the subagent driving code calls the init_xxx() routine, everything else should work as usual. Dave - Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online.- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Tutorial question: "Writing a SubAgent"
One more thing My MIB text file is called "OC-STB-HOST-MIB.txt". In order for the snmpd master agent to utilize this text file, I placed it into the "/usr/local/share/snmp/mibs" directory and added the "mibs +OC-STB-HOST-MIB" line into the "/usr/local/share/snmp/snmp.conf" file. I believe this allows the master agent to display "text" fields for SNMP requests instead of simply displaying OIDs as the results. Now, I do not see this type of functionality beign performed when setting up a subagent.In the tutorial we have been discussing, I am not sure how the subagent is informed of where the "NET-SNMP-TUTORIAL-MIB.txt" file is located. Perhaps you can explain how a subagent finds the "NET-SNMP-TUTORIAL-MIB.txt" file to use? - Sick sense of humor? Visit Yahoo! TV's Comedy with an Edge to see what's on, when. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
