I realize this is a long shot, that I'm behind revisions, and all that
but have a little pity on me, please, I'm working with an old embedded
system.
Recently, I've seen a problem in send_v2trap() that's fairly easy to
reproduce (though with a sequence that's very specific to my system and
I don't know that I can generalize it; I'll work on that). I'm using
Net-SNMP 5.1.1, cross-compiled from Intel to PPC Linux and calling
send_v2trap() results in an Illegal Instruction error. The code looks like:
oid objid_snmptrap[] = { 1, 3, 6, 1, 6, 3, 1, 1, 4, 1, 0 };
size_t objid_snmptrap_len = OID_LENGTH(objid_snmptrap);
// 0 overwritten below with 3 (down) or 4 (up)
oid notification_oid[] = {1, 3, 6, 1, 6, 3, 1, 1, 5, 0 };
size_t notification_oid_len = OID_LENGTH(notification_oid);
oid ifindex_oid[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 1 };
size_t ifindex_oidlen = OID_LENGTH(ifindex_oid);
netsnmp_variable_list *notification_vars = NULL;
static int port;
if (port->MAC_Operational)
notification_oid[notification_oid_len-1] = 4; // Up
else
notification_oid[notification_oid_len-1] = 3; // Down
/*
* add in the trap definition object
*/
snmp_varlist_add_variable(¬ification_vars,
objid_snmptrap, objid_snmptrap_len,
ASN_OBJECT_ID,
(u_char*)notification_oid,
notification_oid_len * sizeof(oid));
/* and the interface number */
port = port->portId;
snmp_varlist_add_variable(¬ification_vars,
ifindex_oid, ifindex_oidlen,
ASN_INTEGER,
(u_char*)&port,
sizeof(port));
/*
* send the trap out. This will send it to all registered
* receivers (see the "SETTING UP TRAP AND/OR INFORM
* DESTINATIONS" section of the snmpd.conf manual page. */
send_v2trap(notification_vars);
I've peppered this with "printf("%s:%d\n", __FILE__, __LINE__)" and I
get to the line before send_v2trap() but never the line after. I'll dig
into the code, put in more debugging, etc. but any Net-SNMP-unique
insight would be appreciated. Thanks.
Chris
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