int
shim_sisis_accept(struct thread * thread)
{
int accept_sock;
int sisis_sock;
struct sisis_listener *listener;
union sockunion su;
char buf[SU_ADDRSTRLEN];
accept_sock = THREAD_FD (thread);
if (accept_sock < 0)
{
zlog_err ("accept_sock is negative value %d", accept_sock);
return -1;
}
thread_add_read (master, shim_sisis_accept, NULL, accept_sock);
sisis_sock = sockunion_accept(accept_sock, &su);
if (sisis_sock < 0)
{
zlog_err ("[Error] SISIS socket accept failed (%s)", safe_strerror (errno));
return -1;
}
zlog_notice ("SISIS connection from host %s", inet_sutop (&su, buf));
listener = XMALLOC (MTYPE_SHIM_SISIS_LISTENER, sizeof(*listener));
listener->fd = accept_sock;
listener->ibuf = stream_new (SV_HEADER_SIZE + 1500);
// memcpy(&listener->su, sa, salen);
listener->sisis_fd = sisis_sock;
listener->dif = stream_fifo_new();
listener->chksum_stream = stream_new(4 * 20); // need to figure out good size for buffering
listener->read_thread = thread_add_read (master, shim_sisis_read, listener, sisis_sock);
listnode_add (sm->listen_sockets, listener);
return 0;
}
/* BGP Peer Incoming Connection Accept thread handler */
s_int32_t
bpn_sock_accept (struct thread *t_accept)
{
struct bgp_listen_sock_lnode *tmp_lnode;
struct bgp_peer_inconn_req *peer_icr;
u_int8_t su_buf [SU_ADDRSTRLEN];
pal_sock_handle_t accept_sock;
pal_sock_handle_t bgp_sock;
struct lib_globals *blg;
struct bgp_peer *peer;
union sockunion su;
struct bgp *bgp;
s_int32_t ret;
bgp_sock = THREAD_FD (t_accept);
blg = THREAD_GLOB (t_accept);
bgp = THREAD_ARG (t_accept);
ret = 0;
/* Sanity check thread variables */
if (! blg || &BLG != blg)
{
ret = -1;
goto EXIT;
}
if (! bgp)
{
zlog_err (&BLG, "[NETWORK] Accept Thread: Invalid Vital Vars, "
"blg(%p) bgp(%p)", blg, bgp);
ret = -1;
goto EXIT;
}
/* Verify integrity of thread variables */
for (tmp_lnode = bgp->listen_sock_lnode; tmp_lnode;
tmp_lnode = tmp_lnode->next)
{
if (tmp_lnode->listen_sock == bgp_sock)
break;
}
if (! tmp_lnode)
{
zlog_err (&BLG, "[NETWORK] Accept Thread: Mismatch in thread args"
"blg(%p) bgp(%p)", blg, bgp);
ret = -1;
goto EXIT;
}
/* Set BGP VR Context */
BGP_SET_VR_CONTEXT (&BLG, bgp->owning_bvr);
/* Re-regiser accept thread */
t_accept = NULL;
BGP_READ_ON (&BLG, t_accept, bgp, bpn_sock_accept, bgp_sock);
/* Update the Accept Thread List Node */
tmp_lnode->t_accept = t_accept;
/* Accept Incoming Connection (Blocking) */
accept_sock = sockunion_accept (&BLG, bgp_sock, &su);
if (accept_sock < 0)
{
zlog_err (&BLG, "[NETWORK] Accept Thread: accept() Failed for Server"
" Sock %d, Err:%d-%s", bgp_sock, errno, pal_strerror (errno));
ret = -1;
goto EXIT;
}
if (BGP_DEBUG (events, EVENTS))
zlog_info (&BLG, "[NETWORK] Accept Thread: Incoming conn from host"
" %s (FD=%u)", inet_sutop (&su, su_buf), accept_sock);
/* Search for Configured Peer with same Remote IP address */
peer = bgp_peer_search (bgp, &su);
if (! peer)
{
if (BGP_DEBUG (events, EVENTS))
zlog_info (&BLG, "[NETWORK] Accept Thread: %s - No such Peer "
"configured", inet_sutop (&su, su_buf));
SSOCK_FD_CLOSE (&BLG, accept_sock);
ret = -1;
goto EXIT;
}
/* Prepare an Incoming Connection Req. Info structure */
peer_icr = XCALLOC (MTYPE_TMP, sizeof (struct bgp_peer_inconn_req));
if (! peer_icr)
{
zlog_err (&BLG, "[NETWORK] Accept Thread:"
" Cannot allocate memory (%d) @ %s:%d",
sizeof (struct bgp_peer_inconn_req), __FILE__, __LINE__);
SSOCK_FD_CLOSE (&BLG, accept_sock);
ret = -1;
goto EXIT;
}
/* Initialize the FIFO Node */
FIFO_INIT (&peer_icr->icr_fifo);
/* Store the ICR Information */
peer_icr->icr_sock = accept_sock;
switch (su.sa.sa_family)
{
case AF_INET:
peer_icr->icr_port = su.sin.sin_port;
break;
#ifdef HAVE_IPV6
case AF_INET6:
peer_icr->icr_port = su.sin6.sin6_port;
break;
#endif /* HAVE_IPV6 */
}
/* Enqueue into Peer's 'bicr_fifo' */
FIFO_ADD (&peer->bicr_fifo, &peer_icr->icr_fifo);
/* Generate BGP Peer FSM ICR Event */
BGP_PEER_FSM_EVENT_ADD (&BLG, peer, BPF_EVENT_TCP_CONN_VALID);
EXIT:
return ret;
}
/* Accept bgp connection. */
static int
bgp_accept (struct thread *thread)
{
int bgp_sock;
int accept_sock;
union sockunion su;
struct bgp_listener *listener = THREAD_ARG(thread);
struct peer *peer;
struct peer *peer1;
char buf[SU_ADDRSTRLEN];
/* Register accept thread. */
accept_sock = THREAD_FD (thread);
if (accept_sock < 0)
{
zlog_err ("accept_sock is nevative value %d", accept_sock);
return -1;
}
listener->thread = thread_add_read (master, bgp_accept, listener, accept_sock);
/* Accept client connection. */
bgp_sock = sockunion_accept (accept_sock, &su);
if (bgp_sock < 0)
{
zlog_err ("[Error] BGP socket accept failed (%s)", safe_strerror (errno));
return -1;
}
set_nonblocking (bgp_sock);
/* Set socket send buffer size */
bgp_update_sock_send_buffer_size(bgp_sock);
if (BGP_DEBUG (events, EVENTS))
zlog_debug ("[Event] BGP connection from host %s", inet_sutop (&su, buf));
/* Check remote IP address */
peer1 = peer_lookup (NULL, &su);
if (! peer1 || peer1->status == Idle)
{
if (BGP_DEBUG (events, EVENTS))
{
if (! peer1)
zlog_debug ("[Event] BGP connection IP address %s is not configured",
inet_sutop (&su, buf));
else
zlog_debug ("[Event] BGP connection IP address %s is Idle state",
inet_sutop (&su, buf));
}
close (bgp_sock);
return -1;
}
bgp_set_socket_ttl (peer1, bgp_sock);
/* Make dummy peer until read Open packet. */
if (BGP_DEBUG (events, EVENTS))
zlog_debug ("[Event] Make dummy peer structure until read Open packet");
{
char buf[SU_ADDRSTRLEN];
peer = peer_create_accept (peer1->bgp);
SET_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER);
peer->su = su;
peer->fd = bgp_sock;
peer->status = Active;
peer->local_id = peer1->local_id;
peer->v_holdtime = peer1->v_holdtime;
peer->v_keepalive = peer1->v_keepalive;
/* Make peer's address string. */
sockunion2str (&su, buf, SU_ADDRSTRLEN);
peer->host = XSTRDUP (MTYPE_BGP_PEER_HOST, buf);
}
BGP_EVENT_ADD (peer, TCP_connection_open);
return 0;
}
/* Accept bgp connection. */
static int
bgp_accept (struct thread *thread)
{
int bgp_sock;
int accept_sock;
union sockunion su;
struct peer *peer;
struct peer *peer1;
struct bgp *bgp;
char buf[SU_ADDRSTRLEN];
/* Regiser accept thread. */
accept_sock = THREAD_FD (thread);
bgp = THREAD_ARG (thread);
if (accept_sock < 0)
{
zlog_err ("accept_sock is nevative value %d", accept_sock);
return -1;
}
thread_add_read (master, bgp_accept, bgp, accept_sock);
/* Accept client connection. */
bgp_sock = sockunion_accept (accept_sock, &su);
if (bgp_sock < 0)
{
zlog_err ("[Error] BGP socket accept failed (%s)", strerror (errno));
return -1;
}
if (BGP_DEBUG (events, EVENTS))
zlog_info ("[Event] BGP connection from host %s", inet_sutop (&su, buf));
/* Check remote IP address */
peer1 = peer_lookup (bgp, &su);
if (! peer1 || peer1->status == Idle)
{
if (BGP_DEBUG (events, EVENTS))
{
if (! peer1)
zlog_info ("[Event] BGP connection IP address %s is not configured",
inet_sutop (&su, buf));
else
zlog_info ("[Event] BGP connection IP address %s is Idle state",
inet_sutop (&su, buf));
}
close (bgp_sock);
return -1;
}
/* In case of peer is EBGP, we should set TTL for this connection. */
if (peer_sort (peer1) == BGP_PEER_EBGP)
sockopt_ttl (peer1->su.sa.sa_family, bgp_sock, peer1->ttl);
if (! bgp)
bgp = peer1->bgp;
/* Make dummy peer until read Open packet. */
if (BGP_DEBUG (events, EVENTS))
zlog_info ("[Event] Make dummy peer structure until read Open packet");
{
char buf[SU_ADDRSTRLEN + 1];
peer = peer_create_accept (bgp);
SET_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER);
peer->su = su;
peer->fd = bgp_sock;
peer->status = Active;
peer->local_id = peer1->local_id;
/* Make peer's address string. */
sockunion2str (&su, buf, SU_ADDRSTRLEN);
peer->host = strdup (buf);
}
BGP_EVENT_ADD (peer, TCP_connection_open);
return 0;
}
/* Accept bgp connection. */
static int bgp_accept(struct thread *thread)
{
int bgp_sock;
int accept_sock;
union sockunion su;
struct bgp_listener *listener = THREAD_ARG(thread);
struct peer *peer;
struct peer *peer1;
char buf[SU_ADDRSTRLEN];
struct bgp *bgp = NULL;
sockunion_init(&su);
/* Register accept thread. */
accept_sock = THREAD_FD(thread);
if (accept_sock < 0) {
flog_err_sys(EC_LIB_SOCKET, "accept_sock is nevative value %d",
accept_sock);
return -1;
}
listener->thread = NULL;
thread_add_read(bm->master, bgp_accept, listener, accept_sock,
&listener->thread);
/* Accept client connection. */
bgp_sock = sockunion_accept(accept_sock, &su);
if (bgp_sock < 0) {
flog_err_sys(EC_LIB_SOCKET,
"[Error] BGP socket accept failed (%s)",
safe_strerror(errno));
return -1;
}
set_nonblocking(bgp_sock);
/* Obtain BGP instance this connection is meant for.
* - if it is a VRF netns sock, then BGP is in listener structure
* - otherwise, the bgp instance need to be demultiplexed
*/
if (listener->bgp)
bgp = listener->bgp;
else if (bgp_get_instance_for_inc_conn(bgp_sock, &bgp)) {
if (bgp_debug_neighbor_events(NULL))
zlog_debug(
"[Event] Could not get instance for incoming conn from %s",
inet_sutop(&su, buf));
close(bgp_sock);
return -1;
}
/* Set socket send buffer size */
setsockopt_so_sendbuf(bgp_sock, BGP_SOCKET_SNDBUF_SIZE);
/* Check remote IP address */
peer1 = peer_lookup(bgp, &su);
if (!peer1) {
peer1 = peer_lookup_dynamic_neighbor(bgp, &su);
if (peer1) {
/* Dynamic neighbor has been created, let it proceed */
peer1->fd = bgp_sock;
bgp_fsm_change_status(peer1, Active);
BGP_TIMER_OFF(
peer1->t_start); /* created in peer_create() */
if (peer_active(peer1))
BGP_EVENT_ADD(peer1, TCP_connection_open);
return 0;
}
}
if (!peer1) {
if (bgp_debug_neighbor_events(NULL)) {
zlog_debug(
"[Event] %s connection rejected - not configured"
" and not valid for dynamic",
inet_sutop(&su, buf));
}
close(bgp_sock);
return -1;
}
if (CHECK_FLAG(peer1->flags, PEER_FLAG_SHUTDOWN)) {
if (bgp_debug_neighbor_events(peer1))
zlog_debug(
"[Event] connection from %s rejected due to admin shutdown",
inet_sutop(&su, buf));
close(bgp_sock);
return -1;
}
/*
* Do not accept incoming connections in Clearing state. This can result
* in incorect state transitions - e.g., the connection goes back to
* Established and then the Clearing_Completed event is generated. Also,
* block incoming connection in Deleted state.
*/
if (peer1->status == Clearing || peer1->status == Deleted) {
if (bgp_debug_neighbor_events(peer1))
zlog_debug(
"[Event] Closing incoming conn for %s (%p) state %d",
peer1->host, peer1, peer1->status);
close(bgp_sock);
return -1;
}
/* Check that at least one AF is activated for the peer. */
if (!peer_active(peer1)) {
if (bgp_debug_neighbor_events(peer1))
zlog_debug(
"%s - incoming conn rejected - no AF activated for peer",
peer1->host);
close(bgp_sock);
return -1;
}
if (bgp_debug_neighbor_events(peer1))
zlog_debug("[Event] BGP connection from host %s fd %d",
inet_sutop(&su, buf), bgp_sock);
if (peer1->doppelganger) {
/* We have an existing connection. Kill the existing one and run
with this one.
*/
if (bgp_debug_neighbor_events(peer1))
zlog_debug(
"[Event] New active connection from peer %s, Killing"
" previous active connection",
peer1->host);
peer_delete(peer1->doppelganger);
}
if (bgp_set_socket_ttl(peer1, bgp_sock) < 0)
if (bgp_debug_neighbor_events(peer1))
zlog_debug(
"[Event] Unable to set min/max TTL on peer %s, Continuing",
peer1->host);
peer = peer_create(&su, peer1->conf_if, peer1->bgp, peer1->local_as,
peer1->as, peer1->as_type, 0, 0, NULL);
hash_release(peer->bgp->peerhash, peer);
hash_get(peer->bgp->peerhash, peer, hash_alloc_intern);
peer_xfer_config(peer, peer1);
UNSET_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE);
peer->doppelganger = peer1;
peer1->doppelganger = peer;
peer->fd = bgp_sock;
vrf_bind(peer->bgp->vrf_id, bgp_sock, bgp_get_bound_name(peer));
bgp_fsm_change_status(peer, Active);
BGP_TIMER_OFF(peer->t_start); /* created in peer_create() */
SET_FLAG(peer->sflags, PEER_STATUS_ACCEPT_PEER);
/* Make dummy peer until read Open packet. */
if (peer1->status == Established
&& CHECK_FLAG(peer1->sflags, PEER_STATUS_NSF_MODE)) {
/* If we have an existing established connection with graceful
* restart
* capability announced with one or more address families, then
* drop
* existing established connection and move state to connect.
*/
peer1->last_reset = PEER_DOWN_NSF_CLOSE_SESSION;
SET_FLAG(peer1->sflags, PEER_STATUS_NSF_WAIT);
bgp_event_update(peer1, TCP_connection_closed);
}
if (peer_active(peer)) {
BGP_EVENT_ADD(peer, TCP_connection_open);
}
return 0;
}
/* Accept bgp connection. */
static int
bgp_accept (struct thread *thread)
{
int bgp_sock; //socket used for BGP connection
int accept_sock;
union sockunion su;
struct bgp_listener *listener = THREAD_ARG(thread);
struct peer *peer;
struct peer *peer1;
char buf[SU_ADDRSTRLEN];
/* Register accept thread to accept connections from a client */
accept_sock = THREAD_FD (thread);
if (accept_sock < 0)
{
zlog_err ("accept_sock is nevative value %d", accept_sock);
return -1;
}
/*creating a new reading thread*/
listener->thread = thread_add_read (master, bgp_accept, listener, accept_sock);
/* --------------------------------------------------
* - BGP ACCEPT -
* --------------------------------------------------
*
*/
printf("\n BGP ACCEPT: About to initialise SSL \n");
ssl_init(); //initialise the library, method, contact of ssl session, returns nothing
printf("\n BGP ACCEPT: About to do socket call \n");
bgp_sock = sockunion_accept (accept_sock, &su);
SSL_accept(BGPoTLS->ssl);
if (bgp_sock < 0)
{
zlog_err ("[Error] BGP socket accept failed (%s)", safe_strerror (errno));
return -1;
}
set_nonblocking (bgp_sock);
if (BGP_DEBUG (events, EVENTS))
zlog_debug("[Event] BGP connection from host %s", inet_sutop (&su, buf));
/* Check remote IP address */
peer1 = peer_lookup (NULL, &su);
if (! peer1 || peer1->status == Idle)
{
if (BGP_DEBUG (events, EVENTS))
{
if (! peer1)
zlog_debug ("[Event] BGP connection IP address %s is not configured",
inet_sutop (&su, buf));
else
zlog_debug ("[Event] BGP connection IP address %s is Idle state",
inet_sutop (&su, buf));
}
close (bgp_sock);
return -1;
}
/* In case of peer is EBGP, we should set TTL for this connection. */
if (peer1->sort == BGP_PEER_EBGP) {
sockopt_ttl (peer1->su.sa.sa_family, bgp_sock, peer1->ttl);
if (peer1->gtsm_hops)
sockopt_minttl (peer1->su.sa.sa_family, bgp_sock, MAXTTL + 1 - peer1->gtsm_hops);
}
/* Make dummy peer until read Open packet. */
if (BGP_DEBUG (events, EVENTS))
zlog_debug ("[Event] Make dummy peer structure until read Open packet");
{
char buf[SU_ADDRSTRLEN];
peer = peer_create_accept (peer1->bgp);
SET_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER);
peer->su = su;
peer->fd = bgp_sock;
peer->status = Active;
peer->local_id = peer1->local_id;
peer->v_holdtime = peer1->v_holdtime;
peer->v_keepalive = peer1->v_keepalive;
/* Make peer's address string. */
sockunion2str (&su, buf, SU_ADDRSTRLEN);
peer->host = XSTRDUP (MTYPE_BGP_PEER_HOST, buf);
}
BGP_EVENT_ADD (peer, TCP_connection_open);
return 0;
}
