Hi everyone,
I am trying to add SNMP support in the IKEv2 project (
http://sourceforge.net/projects/ikev2) and I am using net-snmp, 5.4.1.
Firstly, there is a great number of variables which I plan to register. I am
wondering whether is possible (or harmful) to use one oid variable as:
oid session_oid[] = {.., 13, 1};
and then change last element of this array (to 2,3,..etc.) before
registering different variables? The alternative is to declare and use
different oid array for each variable that I want to register.
More importantly, there is a problem which gives me a headache - a
segmentation fault occasionally happens. Here is a backtrace:
(gdb) bt
#0 0x080fc3e1 in snmp_sess_timeout ()
#1 0x080fc579 in snmp_timeout ()
#2 0x080d8cb5 in snmp_synch_response_cb ()
#3 0x080c9f57 in agentx_synch_response ()
#4 0x080ca702 in agentx_register ()
#5 0x080ba735 in agentx_registration_callback ()
#6 0x0811c0c9 in snmp_call_callbacks ()
#7 0x080ab5b2 in netsnmp_register_mib ()
#8 0x080b04cd in netsnmp_register_handler ()
#9 0x080793aa in sm_sessions_register () at sm.c:441
#10 0x0807e93f in sm_main_thread (data=0xbfd33c28) at sm.c:7778
#11 0x00c1a8ef in g_thread_create_full () from /usr/lib/libglib-2.0.so.0
#12 0x001b53b6 in start_thread () from /lib/libpthread.so.0
#13 0x00b2933e in clone () from /lib/libc.so.6
Function sm_sessions_register() is defined as:
void sm_sessions_register()
{
netsnmp_handler_registration *my_test;
netsnmp_handler_registration *my_test2;
my_test =
netsnmp_create_handler_registration("example",
sm_sess_handle,
session_oid,
OID_LENGTH(session_oid),
HANDLER_CAN_RWRITE);
netsnmp_register_instance(my_test); // --> THIS IS LINE 441!
my_test2 =
netsnmp_create_handler_registration("example2",
sm_sess_handle,
session_oid2,
OID_LENGTH(session_oid2),
HANDLER_CAN_RWRITE);
netsnmp_register_instance(my_test2);
}
session_oid and session_oid2 are defined as:
oid session_oid[] = { 1, 3, 6, 1, 3, 411249, 13, 2, 1 };
oid session_oid2[] = { 1, 3, 6, 1, 3, 411249, 13, 2, 2 };
and they are globals. Sm_sess_handle is written by example in your tutorial
(delayed_instance.c) and I can include this code also if necessary.
I would be very grateful for any help or hint!
Miljen
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