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Merge pull request #18410 from opensourcerouting/fix/print_the_real_reason_supressed_peer

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bgpd: Print the real reason why the peer is not accepted (incoming)
This commit is contained in:
Russ White 2025-03-18 08:46:43 -04:00 committed by GitHub
parent 34b8872699 ace4b8fe61
commit ad7e625c15
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GPG key ID: B5690EEEBB952194
6 changed files with 54 additions and 25 deletions
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2
bgpd/bgp_fsm.c
View file

@ -325,7 +325,7 @@ void bgp_timer_set(struct peer_connection *connection)
/* First entry point of peer's finite state machine. In Idle
status start timer is on unless peer is shutdown or peer is
inactive. All other timer must be turned off */
if (BGP_PEER_START_SUPPRESSED(peer) || !peer_active(connection) ||
if (BGP_PEER_START_SUPPRESSED(peer) || peer_active(connection) != BGP_PEER_ACTIVE ||
peer->bgp->vrf_id == VRF_UNKNOWN) {
EVENT_OFF(connection->t_start);
} else {

29
bgpd/bgp_network.c
View file

@ -389,6 +389,23 @@ static void bgp_socket_set_buffer_size(const int fd)
setsockopt_so_recvbuf(fd, bm->socket_buffer);
}
static const char *bgp_peer_active2str(enum bgp_peer_active active)
{
switch (active) {
case BGP_PEER_ACTIVE:
return "active";
case BGP_PEER_CONNECTION_UNSPECIFIED:
return "unspecified connection";
case BGP_PEER_BFD_DOWN:
return "BFD down";
case BGP_PEER_AF_UNCONFIGURED:
return "no AF activated";
}
assert(!"We should never get here this is a dev escape");
return "ERROR";
}
/* Accept bgp connection. */
static void bgp_accept(struct event *thread)
{
@ -400,6 +417,7 @@ static void bgp_accept(struct event *thread)
struct peer_connection *connection, *incoming;
char buf[SU_ADDRSTRLEN];
struct bgp *bgp = NULL;
enum bgp_peer_active active;
sockunion_init(&su);
@ -508,7 +526,7 @@ static void bgp_accept(struct event *thread)
bgp_fsm_change_status(incoming, Active);
EVENT_OFF(incoming->t_start);
if (peer_active(incoming)) {
if (peer_active(incoming) == BGP_PEER_ACTIVE) {
if (CHECK_FLAG(dynamic_peer->flags, PEER_FLAG_TIMER_DELAYOPEN))
BGP_EVENT_ADD(incoming, TCP_connection_open_w_delay);
else
@ -559,10 +577,11 @@ static void bgp_accept(struct event *thread)
}
/* Check that at least one AF is activated for the peer. */
if (!peer_active(connection)) {
active = peer_active(connection);
if (active != BGP_PEER_ACTIVE) {
if (bgp_debug_neighbor_events(peer))
zlog_debug("%s - incoming conn rejected - no AF activated for peer",
peer->host);
zlog_debug("%s - incoming conn rejected - %s", peer->host,
bgp_peer_active2str(active));
close(bgp_sock);
return;
}
@ -662,7 +681,7 @@ static void bgp_accept(struct event *thread)
bgp_event_update(connection, TCP_connection_closed);
}
if (peer_active(incoming)) {
if (peer_active(incoming) == BGP_PEER_ACTIVE) {
if (CHECK_FLAG(doppelganger->flags, PEER_FLAG_TIMER_DELAYOPEN))
BGP_EVENT_ADD(incoming, TCP_connection_open_w_delay);
else

2
bgpd/bgp_nexthop.c
View file

@ -444,7 +444,7 @@ void bgp_connected_add(struct bgp *bgp, struct connected *ifc)
!peer_established(peer->connection) &&
!CHECK_FLAG(peer->flags, PEER_FLAG_IFPEER_V6ONLY)) {
connection = peer->connection;
if (peer_active(connection))
if (peer_active(connection) == BGP_PEER_ACTIVE)
BGP_EVENT_ADD(connection, BGP_Stop);
BGP_EVENT_ADD(connection, BGP_Start);
}

2
bgpd/bgp_zebra.c
View file

@ -137,7 +137,7 @@ static void bgp_start_interface_nbrs(struct bgp *bgp, struct interface *ifp)
for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
if (peer->conf_if && (strcmp(peer->conf_if, ifp->name) == 0) &&
!peer_established(peer->connection)) {
if (peer_active(peer->connection))
if (peer_active(peer->connection) == BGP_PEER_ACTIVE)
BGP_EVENT_ADD(peer->connection, BGP_Stop);
BGP_EVENT_ADD(peer->connection, BGP_Start);
}

34
bgpd/bgpd.c
View file

@ -1960,7 +1960,7 @@ struct peer *peer_create(union sockunion *su, const char *conf_if,
enum peer_asn_type as_type, struct peer_group *group,
bool config_node, const char *as_str)
{
int active;
enum bgp_peer_active active;
struct peer *peer;
char buf[SU_ADDRSTRLEN];
afi_t afi;
@ -2014,7 +2014,7 @@ struct peer *peer_create(union sockunion *su, const char *conf_if,
}
active = peer_active(peer->connection);
if (!active) {
if (active != BGP_PEER_ACTIVE) {
if (peer->connection->su.sa.sa_family == AF_UNSPEC)
peer->last_reset = PEER_DOWN_NBR_ADDR;
else
@ -2046,7 +2046,7 @@ struct peer *peer_create(union sockunion *su, const char *conf_if,
if (bgp->autoshutdown)
peer_flag_set(peer, PEER_FLAG_SHUTDOWN);
/* Set up peer's events and timers. */
else if (!active && peer_active(peer->connection)) {
else if (active != BGP_PEER_ACTIVE && peer_active(peer->connection) == BGP_PEER_ACTIVE) {
if (peer->last_reset == PEER_DOWN_NOAFI_ACTIVATED)
peer->last_reset = 0;
bgp_timer_set(peer->connection);
@ -2419,7 +2419,7 @@ static void peer_group2peer_config_copy_af(struct peer_group *group,
static int peer_activate_af(struct peer *peer, afi_t afi, safi_t safi)
{
int active;
enum bgp_peer_active active;
struct peer *other;
if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
@ -2447,7 +2447,7 @@ static int peer_activate_af(struct peer *peer, afi_t afi, safi_t safi)
if (peer->group)
peer_group2peer_config_copy_af(peer->group, peer, afi, safi);
if (!active && peer_active(peer->connection)) {
if (active != BGP_PEER_ACTIVE && peer_active(peer->connection) == BGP_PEER_ACTIVE) {
bgp_timer_set(peer->connection);
} else {
peer->last_reset = PEER_DOWN_AF_ACTIVATE;
@ -3391,7 +3391,7 @@ int peer_group_bind(struct bgp *bgp, union sockunion *su, struct peer *peer,
}
/* Set up peer's events and timers. */
if (peer_active(peer->connection))
if (peer_active(peer->connection) == BGP_PEER_ACTIVE)
bgp_timer_set(peer->connection);
}
@ -4720,16 +4720,16 @@ bool bgp_path_attribute_treat_as_withdraw(struct peer *peer, char *buf,
}
/* If peer is configured at least one address family return 1. */
bool peer_active(struct peer_connection *connection)
enum bgp_peer_active peer_active(struct peer_connection *connection)
{
struct peer *peer = connection->peer;
if (BGP_CONNECTION_SU_UNSPEC(connection))
return false;
return BGP_PEER_CONNECTION_UNSPECIFIED;
if (peer->bfd_config) {
if (bfd_session_is_down(peer->bfd_config->session))
return false;
return BGP_PEER_BFD_DOWN;
}
if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
@ -4743,8 +4743,9 @@ bool peer_active(struct peer_connection *connection)
|| peer->afc[AFI_IP6][SAFI_ENCAP]
|| peer->afc[AFI_IP6][SAFI_FLOWSPEC]
|| peer->afc[AFI_L2VPN][SAFI_EVPN])
return true;
return false;
return BGP_PEER_ACTIVE;
return BGP_PEER_AF_UNCONFIGURED;
}
/* If peer is negotiated at least one address family return 1. */
@ -6428,7 +6429,7 @@ int peer_timers_connect_set(struct peer *peer, uint32_t connect)
/* Skip peer-group mechanics for regular peers. */
if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
if (!peer_established(peer->connection)) {
if (peer_active(peer->connection))
if (peer_active(peer->connection) == BGP_PEER_ACTIVE)
BGP_EVENT_ADD(peer->connection, BGP_Stop);
BGP_EVENT_ADD(peer->connection, BGP_Start);
}
@ -6449,7 +6450,7 @@ int peer_timers_connect_set(struct peer *peer, uint32_t connect)
member->v_connect = connect;
if (!peer_established(member->connection)) {
if (peer_active(member->connection))
if (peer_active(member->connection) == BGP_PEER_ACTIVE)
BGP_EVENT_ADD(member->connection, BGP_Stop);
BGP_EVENT_ADD(member->connection, BGP_Start);
}
@ -6482,7 +6483,7 @@ int peer_timers_connect_unset(struct peer *peer)
/* Skip peer-group mechanics for regular peers. */
if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
if (!peer_established(peer->connection)) {
if (peer_active(peer->connection))
if (peer_active(peer->connection) == BGP_PEER_ACTIVE)
BGP_EVENT_ADD(peer->connection, BGP_Stop);
BGP_EVENT_ADD(peer->connection, BGP_Start);
}
@ -6503,7 +6504,7 @@ int peer_timers_connect_unset(struct peer *peer)
member->v_connect = peer->bgp->default_connect_retry;
if (!peer_established(member->connection)) {
if (peer_active(member->connection))
if (peer_active(member->connection) == BGP_PEER_ACTIVE)
BGP_EVENT_ADD(member->connection, BGP_Stop);
BGP_EVENT_ADD(member->connection, BGP_Start);
}
@ -8782,7 +8783,8 @@ static int peer_unshut_after_cfg(struct bgp *bgp)
peer->host);
peer->shut_during_cfg = false;
if (peer_active(peer->connection) && peer->connection->status != Established) {
if (peer_active(peer->connection) == BGP_PEER_ACTIVE &&
peer->connection->status != Established) {
if (peer->connection->status != Idle)
BGP_EVENT_ADD(peer->connection, BGP_Stop);
BGP_EVENT_ADD(peer->connection, BGP_Start);

10
bgpd/bgpd.h
View file

@ -2299,6 +2299,14 @@ enum bgp_martian_type {
BGP_MARTIAN_SOO, /* bgp->evpn_info->macvrf_soo */
};
/* Distinguish the reason why the peer is not active. */
enum bgp_peer_active {
BGP_PEER_ACTIVE,
BGP_PEER_CONNECTION_UNSPECIFIED,
BGP_PEER_BFD_DOWN,
BGP_PEER_AF_UNCONFIGURED,
};
extern const struct message bgp_martian_type_str[];
extern const char *bgp_martian_type2str(enum bgp_martian_type mt);
@ -2347,7 +2355,7 @@ extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
extern enum bgp_peer_sort peer_sort(struct peer *peer);
extern enum bgp_peer_sort peer_sort_lookup(struct peer *peer);
extern bool peer_active(struct peer_connection *connection);
extern enum bgp_peer_active peer_active(struct peer_connection *connection);
extern bool peer_active_nego(struct peer *);
extern bool peer_afc_received(struct peer *peer);
extern bool peer_afc_advertised(struct peer *peer);