OS: Linux
Net-snmp version: 5.7.3
I have written a sub agent using the net-snmp library.
This sub agent opens a web socket(uWs) to a web socket server and receives
events.
It takes the events and maps them to traps and calls the net-snmp library
functions
to forward the traps to snmpd, which forwards them out port 162.
# snmpd -Lsd udp:0.0.0.0
# subAgent -Dsess_process_packet -d
snmpd < -- > subAgent < -- > custom process
Everything was going well until I did a popen() call from my subAgent to
get the IP of the machine I am running on.
(Maybe a coincidence) but now about 95% of the time, I get duplicate traps
coming out of the net-snmp library of the subAgent. If I do not do the
popen() then no duplicates are seen.
When I trun on some debugging in the library, I see unhandled PDU, then a
resend print.
This seems to be causing the duplicated traps.
Any Idea why the popen() would interfere with the library apis?
The popen() and library calls are done by a thread of my subAgent.
sess_process_packet: received message id#0 reqid#2035863312 len 28
{"method":"alertNtfn","params":{"code":1,"alertId":84,"state":"event","name":"CTRLR:1","type":"Configuration
Update","severity":"info","description":"Configuration
Update","modIndex":84,"delIndex":0}}
Coinfiguration Update
+++++++++++++++++++ popen(): ifconfig eth0 | grep 'inet addr:' | cut -d:
-f2 | awk '{ print $1}'
*sess_process_packet: sending message id#290792091 reqid#2035863313 len 212*
Sending 212 bytes to Local IPC: /var/agentx/master
0000: 01 0C 00 00 53 00 00 00 00 00 00 00 11 CF 58 79 ....S.........Xy
0016: C0 00 00 00 43 00 00 00 04 02 00 00 01 00 00 00 ....C...........
0032: 01 00 00 00 03 00 00 00 00 00 00 00 41 7B 17 00 ............A{..
0048: 06 00 00 00 06 06 00 00 03 00 00 00 01 00 00 00 ................
0064: 01 00 00 00 04 00 00 00 01 00 00 00 00 00 00 00 ................
0080: 05 04 01 00 01 00 00 00 4E 2A 00 00 01 00 00 00 ........N*......
0096: 00 00 00 00 22 00 00 00 04 00 00 00 05 04 00 00 ...."...........
0112: 01 00 00 00 4E 2A 00 00 02 00 00 00 0F 00 00 00 ....N*..........
0128: 00 00 00 00 00 00 00 00 04 00 00 00 05 04 00 00 ................
0144: 01 00 00 00 4E 2A 00 00 02 00 00 00 10 00 00 00 ....N*..........
0160: 00 00 00 00 00 00 00 00 04 00 00 00 05 04 00 00 ................
0176: 01 00 00 00 4E 2A 00 00 02 00 00 00 11 00 00 00 ....N*..........
0192: 00 00 00 00 0C 00 00 00 31 30 2E 32 30 2E 31 39 ........10.20.19
0208: 2E 31 38 0A .18.
sess_process_packet: session 0x88bd048 fd 8 pkt 0x88ea0a0 length 220
Received 220 byte packet from Local IPC: abstract
0000: 01 12 00 00 53 00 00 00 00 00 00 00 11 CF 58 79 ....S.........Xy
0016: C8 00 00 00 43 7B 17 00 00 00 00 00 43 00 00 00 ....C{......C...
0032: 04 02 00 00 01 00 00 00 01 00 00 00 03 00 00 00 ................
0048: 00 00 00 00 41 7B 17 00 06 00 00 00 06 06 00 00 ....A{..........
0064: 03 00 00 00 01 00 00 00 01 00 00 00 04 00 00 00 ................
0080: 01 00 00 00 00 00 00 00 05 04 01 00 01 00 00 00 ................
0096: 4E 2A 00 00 01 00 00 00 00 00 00 00 22 00 00 00 N*.........."...
0112: 04 00 00 00 05 04 00 00 01 00 00 00 4E 2A 00 00 ............N*..
0128: 02 00 00 00 0F 00 00 00 00 00 00 00 00 00 00 00 ................
0144: 04 00 00 00 05 04 00 00 01 00 00 00 4E 2A 00 00 ............N*..
0160: 02 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 ................
0176: 04 00 00 00 05 04 00 00 01 00 00 00 4E 2A 00 00 ............N*..
0192: 02 00 00 00 11 00 00 00 00 00 00 00 0C 00 00 00 ................
0208: 31 30 2E 32 30 2E 31 39 2E 31 38 0A 10.20.19.18.
*sess_process_packet: received message id#0 reqid#2035863313 len
220sess_process_packet: unhandled PDUsess_process_packet: resending message
id#290792092 reqid#2035863313 rp_reqid#2035863313 rp_msgid#290792092 len
212*
Sending 212 bytes to Local IPC: /var/agentx/master
0000: 01 0C 00 00 53 00 00 00 00 00 00 00 11 CF 58 79 ....S.........Xy
0016: C0 00 00 00 43 00 00 00 04 02 00 00 01 00 00 00 ....C...........
0032: 01 00 00 00 03 00 00 00 00 00 00 00 41 7B 17 00 ............A{..
0048: 06 00 00 00 06 06 00 00 03 00 00 00 01 00 00 00 ................
0064: 01 00 00 00 04 00 00 00 01 00 00 00 00 00 00 00 ................
0080: 05 04 01 00 01 00 00 00 4E 2A 00 00 01 00 00 00 ........N*......
0096: 00 00 00 00 22 00 00 00 04 00 00 00 05 04 00 00 ...."...........
0112: 01 00 00 00 4E 2A 00 00 02 00 00 00 0F 00 00 00 ....N*..........
0128: 00 00 00 00 00 00 00 00 04 00 00 00 05 04 00 00 ................
0144: 01 00 00 00 4E 2A 00 00 02 00 00 00 10 00 00 00 ....N*..........
0160: 00 00 00 00 00 00 00 00 04 00 00 00 05 04 00 00 ................
0176: 01 00 00 00 4E 2A 00 00 02 00 00 00 11 00 00 00 ....N*..........
0192: 00 00 00 00 0C 00 00 00 31 30 2E 32 30 2E 31 39 ........10.20.19
0208: 2E 31 38 0A .18.
sess_process_packet: sending message id#290792093 reqid#2035863314 len 20
Sending 20 bytes to Local IPC: /var/agentx/master
0000: 01 0D 00 00 53 00 00 00 00 00 00 00 12 CF 58 79 ....S.........Xy
0016: 00 00 00 00 ....
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