int
snmp_synch_response_cb(netsnmp_session * ss,
netsnmp_pdu *pdu,
netsnmp_pdu **response, snmp_callback pcb)
{
struct synch_state lstate, *state;
snmp_callback cbsav;
void *cbmagsav;
int numfds, count;
fd_set fdset;
struct timeval timeout, *tvp;
int block;
memset((void *) &lstate, 0, sizeof(lstate));
state = &lstate;
cbsav = ss->callback;
cbmagsav = ss->callback_magic;
ss->callback = pcb;
ss->callback_magic = (void *) state;
if ((state->reqid = snmp_send(ss, pdu)) == 0) {
snmp_free_pdu(pdu);
state->status = STAT_ERROR;
} else
state->waiting = 1;
while (state->waiting) {
numfds = 0;
FD_ZERO(&fdset);
block = NETSNMP_SNMPBLOCK;
tvp = &timeout;
timerclear(tvp);
snmp_select_info(&numfds, &fdset, tvp, &block);
if (block == 1)
tvp = NULL;
count = select(numfds, &fdset, 0, 0, tvp);
if (count > 0) {
snmp_read(&fdset);
} else {
switch (count) {
case 0:
snmp_timeout();
break;
case -1:
if (errno == EINTR) {
continue;
} else {
snmp_errno = SNMPERR_GENERR;
/*
* CAUTION! if another thread closed the socket(s)
* waited on here, the session structure was freed.
* It would be nice, but we can't rely on the pointer.
* ss->s_snmp_errno = SNMPERR_GENERR;
* ss->s_errno = errno;
*/
snmp_set_detail(strerror(errno));
}
/*
* FALLTHRU
*/
default:
state->status = STAT_ERROR;
state->waiting = 0;
}
}
if ( ss->flags & SNMP_FLAGS_RESP_CALLBACK ) {
void (*cb)(void);
cb = ss->myvoid;
cb(); /* Used to invoke 'netsnmp_check_outstanding_agent_requests();'
on internal AgentX queries. */
}
}
*response = state->pdu;
ss->callback = cbsav;
ss->callback_magic = cbmagsav;
return state->status;
}
0001-.PS.-ZBX-16927-added-verbose-debug-for-snmp.patch
Annotation 2019-11-15 133726.jpg
Team A
