/* SMUX message read function. */
int
smux_read (struct thread *t)
{
int sock;
int len;
u_char buf[SMUXMAXPKTSIZE];
int ret;
/* Clear thread. */
sock = THREAD_FD (t);
smux_read_thread = NULL;
if (debug_smux)
zlog_debug ("SMUX read start");
/* Read message from SMUX socket. */
len = recv (sock, buf, SMUXMAXPKTSIZE, 0);
if (len < 0)
{
zlog_warn ("Can't read all SMUX packet: %s", safe_strerror (errno));
close (sock);
smux_sock = -1;
smux_event (SMUX_CONNECT, 0);
return -1;
}
if (len == 0)
{
zlog_warn ("SMUX connection closed: %d", sock);
close (sock);
smux_sock = -1;
smux_event (SMUX_CONNECT, 0);
return -1;
}
if (debug_smux)
zlog_debug ("SMUX read len: %d", len);
/* Parse the message. */
ret = smux_parse (buf, len);
if (ret < 0)
{
close (sock);
smux_sock = -1;
smux_event (SMUX_CONNECT, 0);
return -1;
}
/* Regiser read thread. */
smux_event (SMUX_READ, sock);
return 0;
}
/* Try to connect to SNMP agent. */
int
smux_connect (struct thread *t)
{
int ret;
if (debug_smux)
zlog_debug ("SMUX connect try %d", fail + 1);
/* Clear thread poner of myself. */
smux_connect_thread = NULL;
/* Make socket. Try to connect. */
smux_sock = smux_socket ();
if (smux_sock < 0)
{
if (++fail < SMUX_MAX_FAILURE)
smux_event (SMUX_CONNECT, 0);
return 0;
}
/* Send OPEN PDU. */
ret = smux_open (smux_sock);
if (ret < 0)
{
zlog_warn ("SMUX open message send failed: %s", safe_strerror (errno));
close (smux_sock);
smux_sock = -1;
if (++fail < SMUX_MAX_FAILURE)
smux_event (SMUX_CONNECT, 0);
return -1;
}
/* Send any outstanding register PDUs. */
ret = smux_register (smux_sock);
if (ret < 0)
{
zlog_warn ("SMUX register message send failed: %s", safe_strerror (errno));
close (smux_sock);
smux_sock = -1;
if (++fail < SMUX_MAX_FAILURE)
smux_event (SMUX_CONNECT, 0);
return -1;
}
/* Everything goes fine. */
smux_event (SMUX_READ, smux_sock);
return 0;
}
void
snmp_stop (struct lib_globals *zg)
{
/* closes the connection. */
#ifdef HAVE_AGENTX
agentx_event (zg, AGENTX_STOP, 0);
#else
smux_event (zg, SMUX_STOP, 0);
#endif
}
void
snmp_start (struct lib_globals *zg)
{
/* Schedule first connection. */
#ifdef HAVE_AGENTX
agentx_event (zg, AGENTX_SCHEDULE, 0);
#else
smux_event (zg, SMUX_SCHEDULE, 0);
#endif
}
void
snmp_restart (struct lib_globals *zg)
{
/* restarts the connection. */
#ifdef HAVE_AGENTX
if (zg->snmp.fail >= AGENTX_MAX_FAILURE)
zg->snmp.fail = 0;
agentx_event (zg, AGENTX_RESTART, 0);
#else
if (zg->snmp.fail >= SMUX_MAX_FAILURE)
zg->snmp.fail = 0;
smux_event (zg, SMUX_RESTART, 0);
#endif
}
