I turned on debugging info with "-D all" and captured the last portion
which I believed is the last transaction of the 5 or so transactions in the
previously mentioned :
Connection from UDP: [127.0.0.1]:55176->[127.0.0.1
I executed:
./adeSensorsTable -f -L -D all -M localhost:1161
Following is the partial capture, I'm not sure what's the internal snmpd
receive packet processing details so can't interpret the dump. It appears
to me that the code was looking for SecName entry that it couldn't find in
(my?) adeSensorsTable.conf file perhaps, please see "<<<<<" for my comment
below :
netsnmp_udp: recvfrom fd 7 got 48 bytes (from UDP:
[127.0.0.1]:54826->[127.0.0.1])
trace: _sess_process_packet(): snmp_api.c, 5113:
sess_process_packet: session 0x81a5438 fd 7 pkt 0x81bed40 length 48
Connection from UDP: [127.0.0.1]:54826->[127.0.0.1]
dumpx_recv:02 01 00
dumpv_recv: Integer: 0 (0x00)
trace: _snmp_parse(): snmp_api.c, 4115:
snmp_api: Parsing SNMPv1 message...
trace: _snmp_parse(): snmp_api.c, 4122:
dumph_recv: SNMPv1 message
trace: snmp_comstr_parse(): snmp_auth.c, 135:
dumph_recv: SNMP version
dumpx_recv: 02 01 00
dumpv_recv: Integer: 0 (0x00)
trace: snmp_comstr_parse(): snmp_auth.c, 147:
dumph_recv: community string
dumpx_recv: 04 06 70 75 62 6C 69 63
dumpv_recv: String: public
trace: _snmp_parse(): snmp_api.c, 4171:
dumph_recv: PDU
trace: snmp_pdu_parse(): snmp_api.c, 4277:
dumpv_recv: Command GET
trace: snmp_pdu_parse(): snmp_api.c, 4358:
dumph_recv: request_id
dumpx_recv: 02 04 07 C5 C4 53
dumpv_recv: Integer: 130401363 (0x7C5C453)
trace: snmp_pdu_parse(): snmp_api.c, 4369:
dumph_recv: error status
dumpx_recv: 02 01 00
dumpv_recv: Integer: 0 (0x00)
trace: snmp_pdu_parse(): snmp_api.c, 4380:
dumph_recv: error index
dumpx_recv: 02 01 00
dumpv_recv: Integer: 0 (0x00)
trace: snmp_pdu_parse(): snmp_api.c, 4398:
dumph_recv: VarBindList
trace: snmp_pdu_parse(): snmp_api.c, 4428:
dumph_recv: VarBind
trace: snmp_parse_var_op(): snmp.c, 166:
dumph_recv: Name
dumpx_recv: 06 0D 2B 06 01 04 01 82 D7 01 01 01 01 01 02
dumpv_recv: ObjID: SNMPv2-SMI::enterprises.43905.1.1.1.1.2
trace: snmp_pdu_parse(): snmp_api.c, 4437:
dumph_recv: Value
trace: init_agent_snmp_session(): snmp_agent.c, 1292:
snmp_agent: agent_sesion 0x81aca60 created
trace: init_agent_snmp_session(): snmp_agent.c, 1307:
verbose:asp: asp 0x81aca60 reqinfo 0x81758b0 created
trace: _callback_lock(): callback.c, 130:
9:callback:lock: locked (APP,null)
trace: snmp_call_callbacks(): callback.c, 322:
callback: START calling callbacks for maj=1 min=5
trace: snmp_call_callbacks(): callback.c, 336:
callback: calling a callback for maj=1 min=5
trace: vacm_check_view(): mibgroup/mibII/vacm_conf.c, 1304:
mibII/vacm_vars: vacm_in_view: ver=0, community=public
trace: netsnmp_udp_getSecName(): snmpUDPDomain.c, 1240:
netsnmp_udp_getSecName: no com2sec entries <<<<< Am I
missing something here in the conf file?
trace: vacm_check_view(): mibgroup/mibII/vacm_conf.c, 1402:
mibII/vacm_vars: vacm_in_view: No security name found
trace: snmp_call_callbacks(): callback.c, 348:
callback: END calling callbacks for maj=1 min=5 (1 called)
trace: _callback_unlock(): callback.c, 164:
9:callback:lock: unlocked (APP,null)
trace: netsnmp_send_traps(): agent_trap.c, 643:
trap: send_trap 4 0 NET-SNMP-MIB::netSnmpAgentOIDs.10
trace: netsnmp_remove_and_free_agent_snmp_session(): snmp_agent.c, 1740:
snmp_agent: REMOVE session == 0x81aca60
trace: free_agent_snmp_session(): snmp_agent.c, 1318:
snmp_agent: agent_session 0x81aca60 released
trace: free_agent_snmp_session(): snmp_agent.c, 1323:
verbose:asp: asp 0x81aca60 reqinfo 0x81758b0 freed
trace: agent_snmp_session_release_cancelled(): snmp_agent.c, 3787:
agent:cancelled: Removing session 0x81aca60
trace: _sess_read(): snmp_api.c, 5437:
sess_read: not reading 5 (fdset 0xbf8ddb40 set 0)
trace: _sess_read(): snmp_api.c, 5437:
sess_read: not reading 3 (fdset 0xbf8ddb40 set 0)
trace: snmp_sess_select_info(): snmp_api.c, 5860:
sess_select: for all sessions: 7 5 3
sess_select: next alarm 0.5897943 sec
sess_select: blocking:no session requests or alarms.
Thanks,
On Thu, Sep 4, 2014 at 5:13 PM, Kenneth Hung <hun...@gmail.com> wrote:
> I'm new to Linux. I'm writing an SNMP extension agent using the MIB for
> Dummies (http://www.net-snmp.org/wiki/index.php/MIB_for_Dummies) config
> file (mib2c.mfd.conf). I successfully created my executable,
> adeSensorsTable, using my own adeSensorsTable.MIB (mib2c util
> auto-generated the C source code from adeSensorsTable.MIB, using
> mib2c.mfd.conf config file, which I compiled into an executable). I then
> ran my executable:
>
> On my 1st terminal, I typed:
> ./adeSensorsTable -f -L -DadeSensorsTable -M localhost:1161
> It returns:
> No log handling enabled - turning on stderr logging
> registered debug token adeSensorsTable, 1
> adeSensorsTable:init_adeSensorsTable: Registering adeSensorsTable as a
> mibs-for-dummies table.
>
>
> -----------------------------------------------------------------------------------------------------------------
> On my 2nd terminal of the same PC:
> I then tried to use snmpget to reach one of my extension agent objects:
>
> To do that I first got the object OID using snmptranslate:
> snmptranslate -On xxxxx-MIB::adeSensorsTable.aDESensorsEntry.vrms
> and got:
>
> .1.3.6.1.4.1.43905.1.1.1.1.2
>
> I then ran:
> snmpget -v 1 -c public localhost:1161 .1.3.6.1.4.1.43905.1.1.1.1.2
>
> It returns:
> Timeout: No Response from localhost:1161.
>
>
> -----------------------------------------------------------------------------------------------------------------
> Back on the 1st terminal where my snmp extension agent binary is running,
> adeSensorsTable, I have :
>
> Connection from UDP: [127.0.0.1]:55176->[127.0.0.1]
> Connection from UDP: [127.0.0.1]:55176->[127.0.0.1]
> Connection from UDP: [127.0.0.1]:55176->[127.0.0.1]
> Connection from UDP: [127.0.0.1]:55176->[127.0.0.1]
> Connection from UDP: [127.0.0.1]:55176->[127.0.0.1]
>
> I'm stumped here! I'd appreciate if you someone can provide some pointers
> on this. Thanks in advance!
>
>
>
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