traphandler and SNMPv2c notifications

Hey,

I've stumbled upon a problem with traphandler and SNMPv2c notifications. 
The community string is not included when sending traps to a traphandler.

I'm using net-snmp-5.1.2 (from debian sarge stable). I've created a 
simple traphandle that dumps everything in a logfile and i've been 
generating test traps with snmptrap (both version 1 and 2c)

version 1:
--
generating the trap:
snmptrap -v 1 -c public1 172.16.0.1 enterprises.22696 172.16.0.1 3 0 '' 
ifIndex.1 i 1

from the traphandler:
172.16.0.1
172.16.0.1
.1.3.6.1.2.1.1.3.0 2:0:27:44.66
.1.3.6.1.6.3.1.1.4.1.0 .1.3.6.1.6.3.1.1.5.4
.1.3.6.1.2.1.2.2.1.1.1 1
.1.3.6.1.6.3.18.1.3.0 172.16.0.1
.1.3.6.1.6.3.18.1.4.0 "public1"
.1.3.6.1.6.3.1.1.4.3.0 .1.3.6.1.4.1.22696

from syslog:
Oct 27 13:50:35 localhost snmptrapd[20826]:  Received 63 bytes from 
172.16.0.1
Oct 27 13:50:35 localhost snmptrapd[20826]: 0000: 30 3D 02 01  00 04 07 
70  75 62 6C 69  63 31 A4 2F    0=.....public1./
Oct 27 13:50:35 localhost snmptrapd[20826]: 0016: 06 08 2B 06  01 04 01 
81  B1 28 40 04  0A FE 06 0A    ..+......(@.....
Oct 27 13:50:35 localhost snmptrapd[20826]: 0032: 02 01 03 02  01 00 43 
04  01 07 FF 56  30 11 30 0F    ......C....V0.0.
Oct 27 13:50:35 localhost snmptrapd[20826]: 0048: 06 0A 2B 06  01 02 01 
02  02 01 01 01  02 01 01       ..+............
Oct 27 13:50:35 localhost snmptrapd[20826]:
Oct 27 13:50:35 localhost snmptrapd[20826]: 2006-10-27 13:50:35 
172.16.0.1(via 172.16.0.1) TRAP, SNMP v1, community public1     
.1.3.6.1.4.1.22696 Link Up Trap (0) Uptime: 2 days, 0:03:33.34    
.1.3.6.1.2.1.2.2.1.1.1 = INTEGER: 1
--

version 2c:
--
generating the trap.
snmptrap -v2c -cpublic1 172.16.0.1 "" enterprises.22696 ifIndex.1 i 1

from the traphandler:
172.16.0.1
172.16.0.1
.1.3.6.1.2.1.1.3.0 2:0:27:16.65
.1.3.6.1.6.3.1.1.4.1.0 .1.3.6.1.4.1.22696
.1.3.6.1.2.1.2.2.1.1.1 1

from syslog:
Oct 27 15:28:58 localhost snmptrapd[1830]:  Received 89 bytes from 
172.16.0.1
Oct 27 15:28:58 localhost snmptrapd[1830]: 0000: 30 57 02 01  01 04 07 
70  75 62 6C 69  63 31 A7 49    0W.....public1.I
Oct 27 15:28:58 localhost snmptrapd[1830]: 0016: 02 04 53 70  E3 0E 02 
01  00 02 01 00  30 3B 30 10    ..Sp........0;0.
Oct 27 15:28:58 localhost snmptrapd[1830]: 0032: 06 08 2B 06  01 02 01 
01  03 00 43 04  01 11 01 3F    ..+.......C....?
Oct 27 15:28:58 localhost snmptrapd[1830]: 0048: 30 16 06 0A  2B 06 01 
06  03 01 01 04  01 00 06 08    0...+...........
Oct 27 15:28:58 localhost snmptrapd[1830]: 0064: 2B 06 01 04  01 81 B1 
28  30 0F 06 0A  2B 06 01 02    +......(0...+...
Oct 27 15:28:58 localhost snmptrapd[1830]: 0080: 01 02 02 01  01 01 02 
01  01                          .........
Oct 27 15:28:58 localhost snmptrapd[1830]:
Oct 27 15:28:58 localhost snmptrapd[1830]: 2006-10-27 15:28:58 
10.254.6.10 [10.254.6.10]: .1.3.6.1.2.1.1.3.0 = Timeticks: (17891647) 2 
days, 1:41:56.47   .1.3.6.1.6.3.1.1.4.1.0 = OID: .1.3.6.1.4.1.22696  
.1.3.6.1.2.1.2.2.1.1.1 = INTEGER: 1
--

I found the 'format2' configuration option for snmptrapd.conf:
format2 %P %v

it changed the output in syslog:
Oct 27 14:14:18 localhost snmptrapd[22953]:  Received 89 bytes from 
172.16.0.1
Oct 27 14:14:18 localhost snmptrapd[22953]: 0000: 30 57 02 01  01 04 07 
70  75 62 6C 69  63 31 A7 49    0W.....public1.I
Oct 27 14:14:18 localhost snmptrapd[22953]: 0016: 02 04 0C 4C  BB 84 02 
01  00 02 01 00  30 3B 30 10    ...L........0;0.
Oct 27 14:14:18 localhost snmptrapd[22953]: 0032: 06 08 2B 06  01 02 01 
01  03 00 43 04  01 0A 2B 51    ..+.......C...+Q
Oct 27 14:14:18 localhost snmptrapd[22953]: 0048: 30 16 06 0A  2B 06 01 
06  03 01 01 04  01 00 06 08    0...+...........
Oct 27 14:14:18 localhost snmptrapd[22953]: 0064: 2B 06 01 04  01 81 B1 
28  30 0F 06 0A  2B 06 01 02    +......(0...+...
Oct 27 14:14:18 localhost snmptrapd[22953]: 0080: 01 02 02 01  01 01 02 
01  01                          .........
Oct 27 14:14:18 localhost snmptrapd[22953]:
Oct 27 14:14:18 localhost snmptrapd[22953]: TRAP2, SNMP v2c, community 
public1 .1.3.6.1.2.1.1.3.0 = Timeticks: (17443665) 2 days, 
0:27:16.65      .1.3.6.1.6.3.1.1.4.1.0 = OID: .1.3.6.1.4.1.22696  
.1.3.6.1.2.1.2.2.1.1.1 = INTEGER: 1

...but not the input to the traphandler.

i've found other people with similar problems:
http://sourceforge.net/mailarchive/forum.php?thread_id=3610505&forum_id=7152
http://groups.google.se/group/mailing.unix.net-snmp-users/browse_thread/thread/9fad8710a2d5b11d/eae68adcfa59f440?lnk=st&q=net-snmp+snmptrapd+2c+community&rnum=10&hl=sv#eae68adcfa59f440

but no solution to the problem.

any help is appreciated.

cheers.

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