On Fri, 12 Jul 2024 at 08:31, Neeraj Bansal <neerajbansal54...@gmail.com> wrote:
> We recompile everything and install no problem, but instead of fixing our
> problem it caused net-snmp-5.9.3 to not be able to start. The error it gives
> is: Bad user id, which could be a red herring. example below:
> [root@testboard: /root# /etc/init.d/S59netsnmp restart
> Stopping SNMP daemon: [OK]
> Starting SNMP daemon: Bad user id: snmp
I think it is a red herring, that error is from the -u option.
# /usr/sbin/snmpd -u blah
Bad user id: blah
I know that is not solving your main issue, but its got rid of one thing.
- Craig
> [root@testboard: /root#
>
> So, we take our patches out and recompile and install, and it works again but
> still has the 255 custom oid limitation.
>
> A snippet from our header file. Too big to paste it all.
>
> #define TEMPC 1
> #define TEMPF 2
> #define UPTIME_STR 3
> #define SERIALNUMBER 4
> #define ALLOFIT 5
> #define ROOTFSBUILD 6
> #define KERNELBUILD 7
> #define OSINFO 8
> ......
> #define PRODUCT_ID 250
> #define RUNSCRIPT 251
> #define TIMER1 252
> #define TIMER2 253
> #define TIMER3 254
> #define TIMER4 255
> #define TIMER5 256 <- This outpts an error because it wraps around and 0 is
> not defined.
> #define TIMER6 257 <- This outputs TEMPC value instead of TIMER6.
> #define TIMER7 258
> #define TIMER8 259
> #define TIMER9 260
> #define TIMER10 261
>
> #define EXAMPLETIMETICKS 3333
> #define EXAMPLEIPADDRESS 4444
> #define EXAMPLECOUNTER 7777
> #define EXAMPLEGAUGE 8888
> #define EXAMPLETRIGGERTRAP 9999
> #define EXAMPLETRIGGERTRAP2 1000
>
> Notice the example defines above that were provided in the example C header
> file, those magic numbers would have never worked because of the u_char
> (8-bit) magic variable limitation.
>
> This is a code snippet from our custom mib C file.
>
> struct variable4 testboard_variables[] = {
> {ROOTFSBUILD, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY, testboard_var, 2, {7,
> 1}},
> {KERNELBUILD, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY, testboard_var, 2, {7,
> 2}},
> {OSINFO, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY, testboard_var, 2, {7, 3}},
> {PRODUCT_ID, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY, etestboard_var, 2, {7,
> 4}},
> {UPTIME_STR, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY, testboard_var, 2, {5,
> 1}},
> {SERIALNUMBER, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY, testboard_var, 2, {5,
> 2}},
> {TEMPC, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY, testboard_var, 2, {6,1}},
> {TEMPF, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY, testboard_var, 2, {6,2}},
>
> We have poured over the souce code looking for any other instance of u_char
> magic that we may have missed, but they are only defined in the two files
> mentioned above.
>
> We need some help with this. What else do we need to do in the 5.9 versions
> to make the magic number not wrap around to zero after 255 and not crash when
> we do that?
>
> Thanks,
>
> Neeraj Bansal
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> Net-snmp-coders@lists.sourceforge.net
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