diff options
Diffstat (limited to 'bgpd/bgp_network.c')
| -rw-r--r-- | bgpd/bgp_network.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/bgpd/bgp_network.c b/bgpd/bgp_network.c index 3e252a06f5..f322de7683 100644 --- a/bgpd/bgp_network.c +++ b/bgpd/bgp_network.c @@ -334,6 +334,53 @@ static int bgp_get_instance_for_inc_conn(int sock, struct bgp **bgp_inst) #endif } +int bgp_tcp_mss_set(struct peer *peer) +{ + struct listnode *node; + int ret = 0; + struct bgp_listener *listener; + uint32_t min_mss = 0; + struct peer *p; + + for (ALL_LIST_ELEMENTS_RO(peer->bgp->peer, node, p)) { + if (!CHECK_FLAG(p->flags, PEER_FLAG_TCP_MSS)) + continue; + + if (!p->tcp_mss) + continue; + + if (!min_mss) + min_mss = p->tcp_mss; + + min_mss = MIN(min_mss, p->tcp_mss); + } + + frr_with_privs(&bgpd_privs) { + for (ALL_LIST_ELEMENTS_RO(bm->listen_sockets, node, listener)) { + if (listener->su.sa.sa_family != + peer->connection->su.sa.sa_family) + continue; + + if (!listener->bgp) { + if (peer->bgp->vrf_id != VRF_DEFAULT) + continue; + } else if (listener->bgp != peer->bgp) + continue; + + /* Set TCP MSS per listener only if there is at least + * one peer that is in passive mode. Otherwise, TCP MSS + * is set per socket via bgp_connect(). + */ + if (CHECK_FLAG(peer->flags, PEER_FLAG_PASSIVE)) + sockopt_tcp_mss_set(listener->fd, min_mss); + + break; + } + } + + return ret; +} + static void bgp_socket_set_buffer_size(const int fd) { if (getsockopt_so_sendbuf(fd) < (int)bm->socket_buffer) @@ -782,6 +829,12 @@ int bgp_connect(struct peer_connection *connection) return connect_error; } + /* If the peer is passive mode, force to move to Active mode. */ + if (CHECK_FLAG(peer->flags, PEER_FLAG_PASSIVE)) { + BGP_EVENT_ADD(connection, TCP_connection_open_failed); + return BGP_FSM_SUCCESS; + } + if (peer->conf_if || peer->ifname) ifindex = ifname2ifindex(peer->conf_if ? peer->conf_if : peer->ifname, |