static void
transport_running(void)
{
snmp_event_init();
snmp_event_add(agentx_entry.sock, SNMP_EV_READ, agentx_read_handler, NULL);
snmp_event_add(agentx_entry.sigfd, SNMP_EV_READ, agentx_signal_handler, NULL);
snmp_event_run();
}
static int
transport_step(long timeout)
{
static int inited = 0;
if (inited == 0) {
snmp_event_init();
snmp_event_add(agentx_entry.sock, SNMP_EV_READ, agentx_read_handler, NULL);
snmp_event_add(agentx_entry.sigfd, SNMP_EV_READ, agentx_signal_handler, NULL);
inited = 1;
}
return snmp_event_step(timeout);
}
void
snmp_hosttrap(struct relayd *env, struct table *table, struct host *host)
{
struct agentx_pdu *pdu;
if (snmp_agentx == NULL || env->sc_snmp == -1)
return;
/*
* OPENBSD-RELAYD-MIB host status trap
* XXX The trap format needs some tweaks and other OIDs
*/
if ((pdu = snmp_agentx_notify_pdu(&hosttrapoid)) == NULL)
return;
SNMP_ELEMENT(".1.0", SNMP_NULL, NULL, 0, pdu);
SNMP_ELEMENT(".1.1.0", SNMP_OCTETSTRING, host->conf.name, 0, pdu);
SNMP_ELEMENT(".1.2.0", SNMP_INTEGER32, NULL, host->up, pdu);
SNMP_ELEMENT(".1.3.0", SNMP_INTEGER32, NULL, host->last_up, pdu);
SNMP_ELEMENT(".1.4.0", SNMP_INTEGER32, NULL, host->up_cnt, pdu);
SNMP_ELEMENT(".1.5.0", SNMP_INTEGER32, NULL, host->check_cnt, pdu);
SNMP_ELEMENT(".1.6.0", SNMP_OCTETSTRING, table->conf.name, 0, pdu);
SNMP_ELEMENT(".1.7.0", SNMP_INTEGER32, NULL, table->up, pdu);
if (!host->conf.retry)
goto done;
SNMP_ELEMENT(".1.8.0", SNMP_INTEGER32, NULL, host->conf.retry, pdu);
SNMP_ELEMENT(".1.9.0", SNMP_INTEGER32, NULL, host->retry_cnt, pdu);
done:
snmp_agentx_send(snmp_agentx, pdu);
snmp_event_add(env, EV_WRITE);
}
int
snmp_getsock(struct relayd *env, struct imsg *imsg)
{
struct timeval tv = SNMP_RECONNECT_TIMEOUT;
struct agentx_pdu *pdu;
if (imsg->fd == -1)
goto retry;
env->sc_snmp = imsg->fd;
log_debug("%s: got new snmp socket %d", __func__, imsg->fd);
if ((snmp_agentx = snmp_agentx_alloc(env->sc_snmp)) == NULL)
fatal("snmp_getsock: agentx alloc");
if ((pdu = snmp_agentx_open_pdu(snmp_agentx, "relayd", NULL)) == NULL)
fatal("snmp_getsock: agentx pdu");
(void)snmp_agentx_send(snmp_agentx, pdu);
snmp_agentx_set_callback(snmp_agentx, snmp_agentx_process, env);
snmp_event_add(env, EV_WRITE);
return (0);
retry:
evtimer_set(&env->sc_snmpto, snmp_sock, env);
evtimer_add(&env->sc_snmpto, &tv);
return (0);
}
/* Send angentX PDU to the remote */
static void
transport_send(uint8_t *buf, int len)
{
agentx_entry.buf = buf;
agentx_entry.len = len;
snmp_event_add(agentx_entry.sock, SNMP_EV_WRITE, agentx_write_handler, &agentx_entry);
}
void
snmp_sock(int fd, short event, void *arg)
{
struct relayd *env = arg;
int evflags = 0;
if (event & EV_TIMEOUT) {
goto reopen;
}
if (event & EV_WRITE) {
if (snmp_agentx_send(snmp_agentx, NULL) == -1) {
if (errno != EAGAIN)
goto close;
/* short write */
evflags |= EV_WRITE;
}
}
if (event & EV_READ) {
if (snmp_agentx_recv(snmp_agentx) == NULL) {
if (snmp_agentx->error) {
log_warnx("agentx protocol error '%i'",
snmp_agentx->error);
goto close;
}
if (errno != EAGAIN) {
log_warn("agentx socket error");
goto close;
}
/* short read */
}
/* PDU handled in the registered callback */
}
snmp_event_add(env, evflags);
return;
close:
log_debug("%s: snmp socket closed %d", __func__, env->sc_snmp);
snmp_agentx_free(snmp_agentx);
env->sc_snmp = -1;
snmp_agentx = NULL;
reopen:
proc_compose_imsg(env->sc_ps, snmp_procid, -1,
IMSG_SNMPSOCK, -1, NULL, 0);
return;
}
