static void pim_msdp_peer_active_connect(struct pim_msdp_peer *mp)
{
int rc;
++mp->conn_attempts;
rc = pim_msdp_sock_connect(mp);
if (PIM_DEBUG_MSDP_INTERNAL) {
zlog_debug("MSDP peer %s pim_msdp_peer_active_connect: %d",
mp->key_str, rc);
}
switch (rc) {
case connect_error:
case -1:
/* connect failed restart the connect-retry timer */
pim_msdp_peer_cr_timer_setup(mp, true /* start */);
break;
case connect_success:
/* connect was sucessful move to established */
pim_msdp_peer_established(mp);
break;
case connect_in_progress:
/* for NB content we need to wait till sock is readable or
* writeable */
PIM_MSDP_PEER_WRITE_ON(mp);
PIM_MSDP_PEER_READ_ON(mp);
/* also restart connect-retry timer to reset the socket if
* connect is
* not sucessful */
pim_msdp_peer_cr_timer_setup(mp, true /* start */);
break;
}
}
/* passive peer socket accept */
static int pim_msdp_sock_accept(struct thread *thread)
{
union sockunion su;
struct pim_instance *pim = THREAD_ARG(thread);
int accept_sock;
int msdp_sock;
struct pim_msdp_peer *mp;
char buf[SU_ADDRSTRLEN];
sockunion_init(&su);
/* re-register accept thread */
accept_sock = THREAD_FD(thread);
if (accept_sock < 0) {
flog_err(LIB_ERR_DEVELOPMENT,
"accept_sock is negative value %d", accept_sock);
return -1;
}
pim->msdp.listener.thread = NULL;
thread_add_read(master, pim_msdp_sock_accept, pim, accept_sock,
&pim->msdp.listener.thread);
/* accept client connection. */
msdp_sock = sockunion_accept(accept_sock, &su);
if (msdp_sock < 0) {
flog_err_sys(LIB_ERR_SOCKET, "pim_msdp_sock_accept failed (%s)",
safe_strerror(errno));
return -1;
}
/* see if have peer config for this */
mp = pim_msdp_peer_find(pim, su.sin.sin_addr);
if (!mp || !PIM_MSDP_PEER_IS_LISTENER(mp)) {
++pim->msdp.rejected_accepts;
if (PIM_DEBUG_MSDP_EVENTS) {
flog_err(PIM_ERR_MSDP_PACKET,
"msdp peer connection refused from %s",
sockunion2str(&su, buf, SU_ADDRSTRLEN));
}
close(msdp_sock);
return -1;
}
if (PIM_DEBUG_MSDP_INTERNAL) {
zlog_debug("MSDP peer %s accept success%s", mp->key_str,
mp->fd >= 0 ? "(dup)" : "");
}
/* if we have an existing connection we need to kill that one
* with this one */
if (mp->fd >= 0) {
if (PIM_DEBUG_MSDP_EVENTS) {
zlog_notice(
"msdp peer new connection from %s stop old connection",
sockunion2str(&su, buf, SU_ADDRSTRLEN));
}
pim_msdp_peer_stop_tcp_conn(mp, true /* chg_state */);
}
mp->fd = msdp_sock;
set_nonblocking(mp->fd);
pim_msdp_update_sock_send_buffer_size(mp->fd);
pim_msdp_peer_established(mp);
return 0;
}