Ooops, I missed that timetick is encoded like signed int...
On 09.06.2017 18:06, Andrew wrote:
Hi all.
I've implemented embedded SNMPv1 agent, and I saw that there's trouble
in parsing timeticks in some rare cases (when time is between ~10 and
~30 minutes). Seems like trouble is when higher bit is set. tcpdump
parses data OK.
Is it net-snmp client bug, or something wrong in response?
snmpget request/response:
$ snmpget -v1 -c xxxxxx 192.168.0.11 .1.3.6.1.2.1.1.3.0
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (4294953866) 497
days, 2:25:38.66
tcpdump:
17:51:27.105193 IP 192.168.0.145.54307 > 192.168.0.11.161:
C="xxxxxxxx" GetRequest(28) .1.3.6.1.2.1.1.3.0
17:51:27.109626 IP 192.168.0.11.161 > 192.168.0.145.54307:
C="xxxxxxxx" GetResponse(30) .1.3.6.1.2.1.1.3.0=52106
response packet (community is masked):
00000000: 30 2D 02 01 00 04 08 xx xx xx xx xx xx xx xx A2
00000010: 1E 02 04 3C 21 EA 80 02 01 00 02 01 00 30 10 30
00000020: 0E 06 08 2B 06 01 02 01 01 03 00 43 02 CB 8A
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