#include <vppinfra/types.h> #include <vlibmemory/api.h> #include <vlib/vlib.h> #include <vlib/buffer.h> #include <vnet/ip/format.h> #include <vnet/ethernet/packet.h> #include <vnet/ip/udp_packet.h> #include <vnet/ip/lookup.h> #include <vnet/ip/icmp46_packet.h> #include <vnet/ip/ip4.h> #include <vnet/ip/ip6.h> #include <vnet/ip/udp.h> #include <vnet/ip/ip6_packet.h> #include <vnet/adj/adj.h> #include <vnet/adj/adj_nbr.h> #include <vnet/bfd/bfd_debug.h> #include <vnet/bfd/bfd_udp.h> #include <vnet/bfd/bfd_main.h> #include <vnet/bfd/bfd_api.h> typedef struct { bfd_main_t *bfd_main; /* hashmap - bfd session index by bfd key - used for CLI/API lookup, where * discriminator is unknown */ mhash_t bfd_session_idx_by_bfd_key; } bfd_udp_main_t; static vlib_node_registration_t bfd_udp4_input_node; static vlib_node_registration_t bfd_udp6_input_node; bfd_udp_main_t bfd_udp_main; void bfd_add_udp4_transport (vlib_main_t *vm, vlib_buffer_t *b, bfd_udp_session_t *bus) { udp_header_t *udp; const bfd_udp_key_t *key = &bus->key; b->flags |= VNET_BUFFER_LOCALLY_ORIGINATED; vnet_buffer (b)->ip.adj_index[VLIB_RX] = bus->adj_index; vnet_buffer (b)->ip.adj_index[VLIB_TX] = bus->adj_index; ip4_header_t *ip4; const size_t headers_size = sizeof (*ip4) + sizeof (*udp); vlib_buffer_advance (b, -headers_size); ip4 = vlib_buffer_get_current (b); udp = (udp_header_t *)(ip4 + 1); memset (ip4, 0, headers_size); ip4->ip_version_and_header_length = 0x45; ip4->ttl = 255; ip4->protocol = IP_PROTOCOL_UDP; ip4->src_address.as_u32 = key->local_addr.ip4.as_u32; ip4->dst_address.as_u32 = key->peer_addr.ip4.as_u32; udp->src_port = clib_host_to_net_u16 (50000); /* FIXME */ udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd4); /* fix ip length, checksum and udp length */ const u16 ip_length = vlib_buffer_length_in_chain (vm, b); ip4->length = clib_host_to_net_u16 (ip_length); ip4->checksum = ip4_header_checksum (ip4); const u16 udp_length = ip_length - (sizeof (*ip4)); udp->length = clib_host_to_net_u16 (udp_length); } void bfd_add_udp6_transport (vlib_main_t *vm, vlib_buffer_t *b, bfd_udp_session_t *bus) { udp_header_t *udp; const bfd_udp_key_t *key = &bus->key; b->flags |= VNET_BUFFER_LOCALLY_ORIGINATED; vnet_buffer (b)->ip.adj_index[VLIB_RX] = bus->adj_index; vnet_buffer (b)->ip.adj_index[VLIB_TX] = bus->adj_index; ip6_header_t *ip6; const size_t headers_size = sizeof (*ip6) + sizeof (*udp); vlib_buffer_advance (b, -headers_size); ip6 = vlib_buffer_get_current (b); udp = (udp_header_t *)(ip6 + 1); memset (ip6, 0, headers_size); ip6->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28); ip6->hop_limit = 255; ip6->protocol = IP_PROTOCOL_UDP; clib_memcpy (&ip6->src_address, &key->local_addr.ip6, sizeof (ip6->src_address)); clib_memcpy (&ip6->dst_address, &key->peer_addr.ip6, sizeof (ip6->dst_address)); udp->src_port = clib_host_to_net_u16 (50000); /* FIXME */ udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd6); /* fix ip payload length and udp length */ const u16 udp_length = vlib_buffer_length_in_chain (vm, b) - (sizeof (*ip6)); udp->length = clib_host_to_net_u16 (udp_length); ip6->payload_length = udp->length; /* IPv6 UDP checksum is mandatory */ int bogus = 0; udp->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus); ASSERT (bogus == 0); if (udp->checksum == 0) { udp->checksum = 0xffff; } } static bfd_session_t *bfd_lookup_session (bfd_udp_main_t *bum, const bfd_udp_key_t *key) { uword *p = mhash_get (&bum->bfd_session_idx_by_bfd_key, key); if (p) { return bfd_find_session_by_idx (bum->bfd_main, *p); } return 0; } static vnet_api_error_t bfd_udp_add_session_internal (bfd_udp_main_t *bum, u32 sw_if_index, u32 desired_min_tx_us, u32 required_min_rx_us, u8 detect_mult, const ip46_address_t *local_addr, const ip46_address_t *peer_addr, u32 *bs_index) { vnet_sw_interface_t *sw_if = vnet_get_sw_interface (vnet_get_main (), sw_if_index); /* get a pool entry and if we end up not needing it, give it back */ bfd_transport_t t = BFD_TRANSPORT_UDP4; if (!ip46_address_is_ip4 (local_addr)) { t = BFD_TRANSPORT_UDP6; } bfd_session_t *bs = bfd_get_session (bum->bfd_main, t); bfd_udp_session_t *bus = &bs->udp; memset (bus, 0, sizeof (*bus)); bfd_udp_key_t *key = &bus->key; key->sw_if_index = sw_if->sw_if_index; key->local_addr.as_u64[0] = local_addr->as_u64[0]; key->local_addr.as_u64[1] = local_addr->as_u64[1]; key->peer_addr.as_u64[0] = peer_addr->as_u64[0]; key->peer_addr.as_u64[1] = peer_addr->as_u64[1]; const bfd_session_t *tmp = bfd_lookup_session (bum, key); if (tmp) { BFD_ERR ("duplicate bfd-udp session, existing bs_idx=%d", tmp->bs_idx); bfd_put_session (bum->bfd_main, bs); return VNET_API_ERROR_BFD_EEXIST; } key->sw_if_index = sw_if->sw_if_index; mhash_set (&bum->bfd_session_idx_by_bfd_key, key, bs->bs_idx, NULL); BFD_DBG ("session created, bs_idx=%u, sw_if_index=%d, local=%U, peer=%U", bs->bs_idx, key->sw_if_index, format_ip46_address, &key->local_addr, IP46_TYPE_ANY, format_ip46_address, &key->peer_addr, IP46_TYPE_ANY); if (BFD_TRANSPORT_UDP4 == t) { bus->adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP4, VNET_LINK_IP4, &key->peer_addr, key->sw_if_index); BFD_DBG ("adj_nbr_add_or_lock(FIB_PROTOCOL_IP4, VNET_LINK_IP4, %U, %d) " "returns %d", format_ip46_address, &key->peer_addr, IP46_TYPE_ANY, key->sw_if_index, bus->adj_index); } else { bus->adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6, VNET_LINK_IP6, &key->peer_addr, key->sw_if_index); BFD_DBG ("adj_nbr_add_or_lock(FIB_PROTOCOL_IP6, VNET_LINK_IP6, %U, %d) " "returns %d", format_ip46_address, &key->peer_addr, IP46_TYPE_ANY, key->sw_if_index, bus->adj_index); } bs->config_desired_min_tx_us = desired_min_tx_us; bs->required_min_rx_us = required_min_rx_us; bs->required_min_echo_rx_us = required_min_rx_us; /* FIXME */ bs->local_detect_mult = detect_mult; bfd_session_start (bum->bfd_main, bs); *bs_index = bs->bs_idx; return 0; } static vnet_api_error_t bfd_udp_validate_api_input (u32 sw_if_index, const ip46_address_t *local_addr, const ip46_address_t *peer_addr) { vnet_sw_interface_t *sw_if = vnet_get_sw_interface (vnet_get_main (), sw_if_index); u8 local_ip_valid = 0; ip_interface_address_t *ia = NULL; if (!sw_if) { BFD_ERR ("got NULL sw_if"); return VNET_API_ERROR_INVALID_SW_IF_INDEX; } if (ip46_address_is_ip4 (local_addr)) { if (!ip46_address_is_ip4 (peer_addr)) { BFD_ERR ("IP family mismatch"); return VNET_API_ERROR_INVALID_ARGUMENT; } ip4_main_t *im = &ip4_main; /* *INDENT-OFF* */ foreach_ip_interface_address ( &im->lookup_main, ia, sw_if_index, 0 /* honor unnumbered */, ({ ip4_address_t *x = ip_interface_address_get_address (&im->lookup_main, ia); if (x->as_u32 == local_addr->ip4.as_u32) { /* valid address for this interface */ local_ip_valid = 1; break; } })); /* *INDENT-ON* */ } else { if (ip46_address_is_ip4 (peer_addr)) { BFD_ERR ("IP family mismatch"); return VNET_API_ERROR_INVALID_ARGUMENT; } ip6_main_t *im = &ip6_main; /* *INDENT-OFF* */ foreach_ip_interface_address ( &im->lookup_main, ia, sw_if_index, 0 /* honor unnumbered */, ({ ip6_address_t *x = ip_interface_address_get_address (&im->lookup_main, ia); if (local_addr->ip6.as_u64[0] == x->as_u64[0] && local_addr->ip6.as_u64[1] == x->as_u64[1]) { /* valid address for this interface */ local_ip_valid = 1; break; } })); /* *INDENT-ON* */ } if (!local_ip_valid) { BFD_ERR ("address not found on interface"); return VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE; } return 0; } vnet_api_error_t bfd_udp_add_session (u32 sw_if_index, u32 desired_min_tx_us, u32 required_min_rx_us, u8 detect_mult, const ip46_address_t *local_addr, const ip46_address_t *peer_addr, u32 *bs_index) { vnet_api_error_t rv = bfd_udp_validate_api_input (sw_if_index, local_addr, peer_addr); if (rv) { return rv; } if (detect_mult < 1) { BFD_ERR ("detect_mult < 1"); return VNET_API_ERROR_INVALID_ARGUMENT; } if (desired_min_tx_us < 1) { BFD_ERR ("desired_min_tx_us < 1"); return VNET_API_ERROR_INVALID_ARGUMENT; } return bfd_udp_add_session_internal ( &bfd_udp_main, sw_if_index, desired_min_tx_us, required_min_rx_us, detect_mult, local_addr, peer_addr, bs_index); } vnet_api_error_t bfd_udp_del_session (u32 sw_if_index, const ip46_address_t *local_addr, const ip46_address_t *peer_addr) { vnet_api_error_t rv = bfd_udp_validate_api_input (sw_if_index, local_addr, peer_addr); if (rv) { return rv; } bfd_udp_main_t *bum = &bfd_udp_main; vnet_sw_interface_t *sw_if = vnet_get_sw_interface (vnet_get_main (), sw_if_index); bfd_udp_key_t key; memset (&key, 0, sizeof (key)); key.sw_if_index = sw_if->sw_if_index; key.local_addr.as_u64[0] = local_addr->as_u64[0]; key.local_addr.as_u64[1] = local_addr->as_u64[1]; key.peer_addr.as_u64[0] = peer_addr->as_u64[0]; key.peer_addr.as_u64[1] = peer_addr->as_u64[1]; bfd_session_t *tmp = bfd_lookup_session (bum, &key); if (tmp) { BFD_DBG ("free bfd-udp session, bs_idx=%d", tmp->bs_idx); mhash_unset (&bum->bfd_session_idx_by_bfd_key, &key, NULL); adj_unlock (tmp->udp.adj_index); bfd_put_session (bum->bfd_main, tmp); } else { BFD_ERR ("no such session"); return VNET_API_ERROR_BFD_NOENT; } return 0; } typedef enum { BFD_UDP_INPUT_NEXT_NORMAL, BFD_UDP_INPUT_NEXT_REPLY, BFD_UDP_INPUT_N_NEXT, } bfd_udp_input_next_t; /* Packet counters */ #define foreach_bfd_udp_error(F) \ F (NONE, "good bfd packets (processed)") \ F (BAD, "invalid bfd packets") \ F (DISABLED, "bfd packets received on disabled interfaces") #define F(sym, string) static char BFD_UDP_ERR_##sym##_STR[] = string; foreach_bfd_udp_error (F); #undef F static char *bfd_udp_error_strings[] = { #define F(sym, string) BFD_UDP_ERR_##sym##_STR, foreach_bfd_udp_error (F) #undef F }; typedef enum { #define F(sym, str) BFD_UDP_ERROR_##sym, foreach_bfd_udp_error (F) #undef F BFD_UDP_N_ERROR, } bfd_udp_error_t; static void bfd_udp4_find_headers (vlib_buffer_t *b, const ip4_header_t **ip4, const udp_header_t **udp) { /* sanity check first */ const i32 start = vnet_buffer (b)->ip.start_of_ip_header; if (start < 0 && start < sizeof (b->pre_data)) { BFD_ERR ("Start of ip header is before pre_data, ignoring"); *ip4 = NULL; *udp = NULL; return; } *ip4 = (ip4_header_t *)(b->data + start); if ((u8 *)*ip4 > (u8 *)vlib_buffer_get_current (b)) { BFD_ERR ("Start of ip header is beyond current data, ignoring"); *ip4 = NULL; *udp = NULL; return; } *udp = (udp_header_t *)((*ip4) + 1); } static bfd_udp_error_t bfd_udp4_verify_transport (const ip4_header_t *ip4, const udp_header_t *udp, const bfd_session_t *bs) { const bfd_udp_session_t *bus = &bs->udp; const bfd_udp_key_t *key = &bus->key; if (ip4->src_address.as_u32 != key->peer_addr.ip4.as_u32) { BFD_ERR ("IPv4 src addr mismatch, got %U, expected %U", format_ip4_address, ip4->src_address.as_u8, format_ip4_address, key->peer_addr.ip4.as_u8); return BFD_UDP_ERROR_BAD; } if (ip4->dst_address.as_u32 != key->local_addr.ip4.as_u32) { BFD_ERR ("IPv4 dst addr mismatch, got %U, expected %U", format_ip4_address, ip4->dst_address.as_u8, format_ip4_address, key->local_addr.ip4.as_u8); return BFD_UDP_ERROR_BAD; } const u8 expected_ttl = 255; if (ip4->ttl != expected_ttl) { BFD_ERR ("IPv4 unexpected TTL value %u, expected %u", ip4->ttl, expected_ttl); return BFD_UDP_ERROR_BAD; } if (clib_net_to_host_u16 (udp->src_port) < 49152 || clib_net_to_host_u16 (udp->src_port) > 65535) { BFD_ERR ("Invalid UDP src port %u, out of range <49152,65535>", udp->src_port); } return BFD_UDP_ERROR_NONE; } typedef struct { u32 bs_idx; bfd_pkt_t pkt; } bfd_rpc_update_t; static void bfd_rpc_update_session_cb (const bfd_rpc_update_t *a) { bfd_consume_pkt (bfd_udp_main.bfd_main, &a->pkt, a->bs_idx); } static void bfd_rpc_update_session (u32 bs_idx, const bfd_pkt_t *pkt) { /* packet length was already verified to be correct by the caller */ const u32 data_size = sizeof (bfd_rpc_update_t) - STRUCT_SIZE_OF (bfd_rpc_update_t, pkt) + pkt->head.length; u8 data[data_size]; bfd_rpc_update_t *update = (bfd_rpc_update_t *)data; update->bs_idx = bs_idx; clib_memcpy (&update->pkt, pkt, pkt->head.length); vl_api_rpc_call_main_thread (bfd_rpc_update_session_cb, data, data_size); } static bfd_udp_error_t bfd_udp4_scan (vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_buffer_t *b, bfd_session_t **bs_out) { const bfd_pkt_t *pkt = vlib_buffer_get_current (b); if (sizeof (*pkt) > b->current_length) { BFD_ERR ( "Payload size %d too small to hold bfd packet of minimum size %d", b->current_length, sizeof (*pkt)); return BFD_UDP_ERROR_BAD; } const ip4_header_t *ip4; const udp_header_t *udp; bfd_udp4_find_headers (b, &ip4, &udp); if (!ip4 || !udp) { BFD_ERR ("Couldn't find ip4 or udp header"); return BFD_UDP_ERROR_BAD; } if (!bfd_verify_pkt_common (pkt)) { return BFD_UDP_ERROR_BAD; } bfd_session_t *bs = NULL; if (pkt->your_disc) { BFD_DBG ("Looking up BFD session using discriminator %u", pkt->your_disc); bs = bfd_find_session_by_disc (bfd_udp_main.bfd_main, pkt->your_disc); } else { bfd_udp_key_t key; memset (&key, 0, sizeof (key)); key.sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; key.local_addr.ip4.as_u32 = ip4->dst_address.as_u32; key.peer_addr.ip4.as_u32 = ip4->src_address.as_u32; BFD_DBG ("Looking up BFD session using key (sw_if_index=%u, local=%U, " "peer=%U)", key.sw_if_index, format_ip4_address, key.local_addr.ip4.as_u8, format_ip4_address, key.peer_addr.ip4.as_u8); bs = bfd_lookup_session (&bfd_udp_main, &key); } if (!bs) { BFD_ERR ("BFD session lookup failed - no session matches BFD pkt"); return BFD_UDP_ERROR_BAD; } BFD_DBG ("BFD session found, bs_idx=%u", bs->bs_idx); if (!bfd_verify_pkt_session (pkt, b->current_length, bs)) { return BFD_UDP_ERROR_BAD; } bfd_udp_error_t err; if (BFD_UDP_ERROR_NONE != (err = bfd_udp4_verify_transport (ip4, udp, bs))) { return err; } bfd_rpc_update_session (bs->bs_idx, pkt); *bs_out = bs; return BFD_UDP_ERROR_NONE; } static void bfd_udp6_find_headers (vlib_buffer_t *b, const ip6_header_t **ip6, const udp_header_t **udp) { /* sanity check first */ const i32 start = vnet_buffer (b)->ip.start_of_ip_header; if (start < 0 && start < sizeof (b->pre_data)) { BFD_ERR ("Start of ip header is before pre_data, ignoring"); *ip6 = NULL; *udp = NULL; return; } *ip6 = (ip6_header_t *)(b->data + start); if ((u8 *)*ip6 > (u8 *)vlib_buffer_get_current (b)) { BFD_ERR ("Start of ip header is beyond current data, ignoring"); *ip6 = NULL; *udp = NULL; return; } *udp = (udp_header_t *)((*ip6) + 1); } static bfd_udp_error_t bfd_udp6_verify_transport (const ip6_header_t *ip6, const udp_header_t *udp, const bfd_session_t *bs) { const bfd_udp_session_t *bus = &bs->udp; const bfd_udp_key_t *key = &bus->key; if (ip6->src_address.as_u64[0] != key->peer_addr.ip6.as_u64[0] && ip6->src_address.as_u64[1] != key->peer_addr.ip6.as_u64[1]) { BFD_ERR ("IP src addr mismatch, got %U, expected %U", format_ip6_address, ip6, format_ip6_address, &key->peer_addr.ip6); return BFD_UDP_ERROR_BAD; } if (ip6->dst_address.as_u64[0] != key->local_addr.ip6.as_u64[0] && ip6->dst_address.as_u64[1] != key->local_addr.ip6.as_u64[1]) { BFD_ERR ("IP dst addr mismatch, got %U, expected %U", format_ip6_address, ip6, format_ip6_address, &key->local_addr.ip6); return BFD_UDP_ERROR_BAD; } const u8 expected_hop_limit = 255; if (ip6->hop_limit != expected_hop_limit) { BFD_ERR ("IPv6 unexpected hop-limit value %u, expected %u", ip6->hop_limit, expected_hop_limit); return BFD_UDP_ERROR_BAD; } if (clib_net_to_host_u16 (udp->src_port) < 49152 || clib_net_to_host_u16 (udp->src_port) > 65535) { BFD_ERR ("Invalid UDP src port %u, out of range <49152,65535>", udp->src_port); } return BFD_UDP_ERROR_NONE; } static bfd_udp_error_t bfd_udp6_scan (vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_buffer_t *b, bfd_session_t **bs_out) { const bfd_pkt_t *pkt = vlib_buffer_get_current (b); if (sizeof (*pkt) > b->current_length) { BFD_ERR ( "Payload size %d too small to hold bfd packet of minimum size %d", b->current_length, sizeof (*pkt)); return BFD_UDP_ERROR_BAD; } const ip6_header_t *ip6; const udp_header_t *udp; bfd_udp6_find_headers (b, &ip6, &udp); if (!ip6 || !udp) { BFD_ERR ("Couldn't find ip6 or udp header"); return BFD_UDP_ERROR_BAD; } if (!bfd_verify_pkt_common (pkt)) { return BFD_UDP_ERROR_BAD; } bfd_session_t *bs = NULL; if (pkt->your_disc) { BFD_DBG ("Looking up BFD session using discriminator %u", pkt->your_disc); bs = bfd_find_session_by_disc (bfd_udp_main.bfd_main, pkt->your_disc); } else { bfd_udp_key_t key; memset (&key, 0, sizeof (key)); key.sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; key.local_addr.ip6.as_u64[0] = ip6->dst_address.as_u64[0]; key.local_addr.ip6.as_u64[1] = ip6->dst_address.as_u64[1]; key.peer_addr.ip6.as_u64[0] = ip6->src_address.as_u64[0]; key.peer_addr.ip6.as_u64[1] = ip6->src_address.as_u64[1]; BFD_DBG ("Looking up BFD session using key (sw_if_index=%u, local=%U, " "peer=%U)", key.sw_if_index, format_ip6_address, &key.local_addr, format_ip6_address, &key.peer_addr); bs = bfd_lookup_session (&bfd_udp_main, &key); } if (!bs) { BFD_ERR ("BFD session lookup failed - no session matches BFD pkt"); return BFD_UDP_ERROR_BAD; } BFD_DBG ("BFD session found, bs_idx=%u", bs->bs_idx); if (!bfd_verify_pkt_session (pkt, b->current_length, bs)) { return BFD_UDP_ERROR_BAD; } bfd_udp_error_t err; if (BFD_UDP_ERROR_NONE != (err = bfd_udp6_verify_transport (ip6, udp, bs))) { return err; } bfd_rpc_update_session (bs->bs_idx, pkt); *bs_out = bs; return BFD_UDP_ERROR_NONE; } /* * Process a frame of bfd packets * Expect 1 packet / frame */ static uword bfd_udp_input (vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f, int is_ipv6) { u32 n_left_from, *from; bfd_input_trace_t *t0; from = vlib_frame_vector_args (f); /* array of buffer indices */ n_left_from = f->n_vectors; /* number of buffer indices */ while (n_left_from > 0) { u32 bi0; vlib_buffer_t *b0; u32 next0, error0; bi0 = from[0]; b0 = vlib_get_buffer (vm, bi0); bfd_session_t *bs = NULL; /* If this pkt is traced, snapshot the data */ if (b0->flags & VLIB_BUFFER_IS_TRACED) { int len; t0 = vlib_add_trace (vm, rt, b0, sizeof (*t0)); len = (b0->current_length < sizeof (t0->data)) ? b0->current_length : sizeof (t0->data); t0->len = len; clib_memcpy (t0->data, vlib_buffer_get_current (b0), len); } /* scan this bfd pkt. error0 is the counter index to bmp */ if (is_ipv6) { error0 = bfd_udp6_scan (vm, rt, b0, &bs); } else { error0 = bfd_udp4_scan (vm, rt, b0, &bs); } b0->error = rt->errors[error0]; next0 = BFD_UDP_INPUT_NEXT_NORMAL; if (BFD_UDP_ERROR_NONE == error0) { /* if everything went fine, check for poll bit, if present, re-use the buffer and based on (now updated) session parameters, send the final packet back */ const bfd_pkt_t *pkt = vlib_buffer_get_current (b0); if (bfd_pkt_get_poll (pkt)) { bfd_send_final (vm, b0, bs); if (is_ipv6) { vlib_node_increment_counter (vm, bfd_udp6_input_node.index, b0->error, 1); } else { vlib_node_increment_counter (vm, bfd_udp4_input_node.index, b0->error, 1); } next0 = BFD_UDP_INPUT_NEXT_REPLY; } } vlib_set_next_frame_buffer (vm, rt, next0, bi0); from += 1; n_left_from -= 1; } return f->n_vectors; } static uword bfd_udp4_input (vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f) { return bfd_udp_input (vm, rt, f, 0); } /* * bfd input graph node declaration */ /* *INDENT-OFF* */ VLIB_REGISTER_NODE (bfd_udp4_input_node, static) = { .function = bfd_udp4_input, .name = "bfd-udp4-input", .vector_size = sizeof (u32), .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = BFD_UDP_N_ERROR, .error_strings = bfd_udp_error_strings, .format_trace = bfd_input_format_trace, .n_next_nodes = BFD_UDP_INPUT_N_NEXT, .next_nodes = { [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop", [BFD_UDP_INPUT_NEXT_REPLY] = "ip4-lookup", }, }; /* *INDENT-ON* */ static uword bfd_udp6_input (vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f) { return bfd_udp_input (vm, rt, f, 1); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (bfd_udp6_input_node, static) = { .function = bfd_udp6_input, .name = "bfd-udp6-input", .vector_size = sizeof (u32), .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = BFD_UDP_N_ERROR, .error_strings = bfd_udp_error_strings, .format_trace = bfd_input_format_trace, .n_next_nodes = BFD_UDP_INPUT_N_NEXT, .next_nodes = { [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop", [BFD_UDP_INPUT_NEXT_REPLY] = "ip6-lookup", }, }; /* *INDENT-ON* */ static clib_error_t *bfd_sw_interface_up_down (vnet_main_t *vnm, u32 sw_if_index, u32 flags) { // vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index); if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)) { /* TODO */ } return 0; } VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (bfd_sw_interface_up_down); static clib_error_t *bfd_hw_interface_up_down (vnet_main_t *vnm, u32 hw_if_index, u32 flags) { if (flags & VNET_HW_INTERFACE_FLAG_LINK_UP) { /* TODO */ } return 0; } VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION (bfd_hw_interface_up_down); /* * setup function */ static clib_error_t *bfd_udp_init (vlib_main_t *vm) { mhash_init (&bfd_udp_main.bfd_session_idx_by_bfd_key, sizeof (uword), sizeof (bfd_udp_key_t)); bfd_udp_main.bfd_main = &bfd_main; udp_register_dst_port (vm, UDP_DST_PORT_bfd4, bfd_udp4_input_node.index, 1); udp_register_dst_port (vm, UDP_DST_PORT_bfd6, bfd_udp6_input_node.index, 0); return 0; } VLIB_INIT_FUNCTION (bfd_udp_init);