1 #include <vppinfra/types.h>
2 #include <vlibmemory/api.h>
4 #include <vlib/buffer.h>
5 #include <vnet/ip/format.h>
6 #include <vnet/ethernet/packet.h>
7 #include <vnet/ip/udp_packet.h>
8 #include <vnet/ip/lookup.h>
9 #include <vnet/ip/icmp46_packet.h>
10 #include <vnet/ip/ip4.h>
11 #include <vnet/ip/ip6.h>
12 #include <vnet/ip/udp.h>
13 #include <vnet/ip/ip6_packet.h>
14 #include <vnet/adj/adj.h>
15 #include <vnet/adj/adj_nbr.h>
16 #include <vnet/bfd/bfd_debug.h>
17 #include <vnet/bfd/bfd_udp.h>
18 #include <vnet/bfd/bfd_main.h>
19 #include <vnet/bfd/bfd_api.h>
24 /* hashmap - bfd session index by bfd key - used for CLI/API lookup, where
25 * discriminator is unknown */
26 mhash_t bfd_session_idx_by_bfd_key;
29 static vlib_node_registration_t bfd_udp4_input_node;
30 static vlib_node_registration_t bfd_udp6_input_node;
32 bfd_udp_main_t bfd_udp_main;
34 void bfd_add_udp4_transport (vlib_main_t *vm, vlib_buffer_t *b,
35 bfd_udp_session_t *bus)
38 const bfd_udp_key_t *key = &bus->key;
40 b->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
41 vnet_buffer (b)->ip.adj_index[VLIB_RX] = bus->adj_index;
42 vnet_buffer (b)->ip.adj_index[VLIB_TX] = bus->adj_index;
44 const size_t headers_size = sizeof (*ip4) + sizeof (*udp);
45 vlib_buffer_advance (b, -headers_size);
46 ip4 = vlib_buffer_get_current (b);
47 udp = (udp_header_t *)(ip4 + 1);
48 memset (ip4, 0, headers_size);
49 ip4->ip_version_and_header_length = 0x45;
51 ip4->protocol = IP_PROTOCOL_UDP;
52 ip4->src_address.as_u32 = key->local_addr.ip4.as_u32;
53 ip4->dst_address.as_u32 = key->peer_addr.ip4.as_u32;
55 udp->src_port = clib_host_to_net_u16 (50000); /* FIXME */
56 udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd4);
58 /* fix ip length, checksum and udp length */
59 const u16 ip_length = vlib_buffer_length_in_chain (vm, b);
61 ip4->length = clib_host_to_net_u16 (ip_length);
62 ip4->checksum = ip4_header_checksum (ip4);
64 const u16 udp_length = ip_length - (sizeof (*ip4));
65 udp->length = clib_host_to_net_u16 (udp_length);
68 void bfd_add_udp6_transport (vlib_main_t *vm, vlib_buffer_t *b,
69 bfd_udp_session_t *bus)
72 const bfd_udp_key_t *key = &bus->key;
74 b->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
75 vnet_buffer (b)->ip.adj_index[VLIB_RX] = bus->adj_index;
76 vnet_buffer (b)->ip.adj_index[VLIB_TX] = bus->adj_index;
78 const size_t headers_size = sizeof (*ip6) + sizeof (*udp);
79 vlib_buffer_advance (b, -headers_size);
80 ip6 = vlib_buffer_get_current (b);
81 udp = (udp_header_t *)(ip6 + 1);
82 memset (ip6, 0, headers_size);
83 ip6->ip_version_traffic_class_and_flow_label =
84 clib_host_to_net_u32 (0x6 << 28);
86 ip6->protocol = IP_PROTOCOL_UDP;
87 clib_memcpy (&ip6->src_address, &key->local_addr.ip6,
88 sizeof (ip6->src_address));
89 clib_memcpy (&ip6->dst_address, &key->peer_addr.ip6,
90 sizeof (ip6->dst_address));
92 udp->src_port = clib_host_to_net_u16 (50000); /* FIXME */
93 udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd6);
95 /* fix ip payload length and udp length */
96 const u16 udp_length = vlib_buffer_length_in_chain (vm, b) - (sizeof (*ip6));
97 udp->length = clib_host_to_net_u16 (udp_length);
98 ip6->payload_length = udp->length;
100 /* IPv6 UDP checksum is mandatory */
102 udp->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
104 if (udp->checksum == 0)
106 udp->checksum = 0xffff;
110 static bfd_session_t *bfd_lookup_session (bfd_udp_main_t *bum,
111 const bfd_udp_key_t *key)
113 uword *p = mhash_get (&bum->bfd_session_idx_by_bfd_key, key);
116 return bfd_find_session_by_idx (bum->bfd_main, *p);
121 static vnet_api_error_t
122 bfd_udp_add_session_internal (bfd_udp_main_t *bum, u32 sw_if_index,
123 u32 desired_min_tx_us, u32 required_min_rx_us,
124 u8 detect_mult, const ip46_address_t *local_addr,
125 const ip46_address_t *peer_addr, u32 *bs_index)
127 vnet_sw_interface_t *sw_if =
128 vnet_get_sw_interface (vnet_get_main (), sw_if_index);
129 /* get a pool entry and if we end up not needing it, give it back */
130 bfd_transport_t t = BFD_TRANSPORT_UDP4;
131 if (!ip46_address_is_ip4 (local_addr))
133 t = BFD_TRANSPORT_UDP6;
135 bfd_session_t *bs = bfd_get_session (bum->bfd_main, t);
136 bfd_udp_session_t *bus = &bs->udp;
137 memset (bus, 0, sizeof (*bus));
138 bfd_udp_key_t *key = &bus->key;
139 key->sw_if_index = sw_if->sw_if_index;
140 key->local_addr.as_u64[0] = local_addr->as_u64[0];
141 key->local_addr.as_u64[1] = local_addr->as_u64[1];
142 key->peer_addr.as_u64[0] = peer_addr->as_u64[0];
143 key->peer_addr.as_u64[1] = peer_addr->as_u64[1];
144 const bfd_session_t *tmp = bfd_lookup_session (bum, key);
147 BFD_ERR ("duplicate bfd-udp session, existing bs_idx=%d", tmp->bs_idx);
148 bfd_put_session (bum->bfd_main, bs);
149 return VNET_API_ERROR_BFD_EEXIST;
151 key->sw_if_index = sw_if->sw_if_index;
152 mhash_set (&bum->bfd_session_idx_by_bfd_key, key, bs->bs_idx, NULL);
153 BFD_DBG ("session created, bs_idx=%u, sw_if_index=%d, local=%U, peer=%U",
154 bs->bs_idx, key->sw_if_index, format_ip46_address, &key->local_addr,
155 IP46_TYPE_ANY, format_ip46_address, &key->peer_addr, IP46_TYPE_ANY);
156 if (BFD_TRANSPORT_UDP4 == t)
158 bus->adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP4, VNET_LINK_IP4,
159 &key->peer_addr, key->sw_if_index);
160 BFD_DBG ("adj_nbr_add_or_lock(FIB_PROTOCOL_IP4, VNET_LINK_IP4, %U, %d) "
162 format_ip46_address, &key->peer_addr, IP46_TYPE_ANY,
163 key->sw_if_index, bus->adj_index);
167 bus->adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6, VNET_LINK_IP6,
168 &key->peer_addr, key->sw_if_index);
169 BFD_DBG ("adj_nbr_add_or_lock(FIB_PROTOCOL_IP6, VNET_LINK_IP6, %U, %d) "
171 format_ip46_address, &key->peer_addr, IP46_TYPE_ANY,
172 key->sw_if_index, bus->adj_index);
174 bs->config_desired_min_tx_us = desired_min_tx_us;
175 bs->required_min_rx_us = required_min_rx_us;
176 bs->required_min_echo_rx_us = required_min_rx_us; /* FIXME */
177 bs->local_detect_mult = detect_mult;
178 bfd_session_start (bum->bfd_main, bs);
179 *bs_index = bs->bs_idx;
183 static vnet_api_error_t
184 bfd_udp_validate_api_input (u32 sw_if_index, const ip46_address_t *local_addr,
185 const ip46_address_t *peer_addr)
187 vnet_sw_interface_t *sw_if =
188 vnet_get_sw_interface (vnet_get_main (), sw_if_index);
189 u8 local_ip_valid = 0;
190 ip_interface_address_t *ia = NULL;
193 BFD_ERR ("got NULL sw_if");
194 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
196 if (ip46_address_is_ip4 (local_addr))
198 if (!ip46_address_is_ip4 (peer_addr))
200 BFD_ERR ("IP family mismatch");
201 return VNET_API_ERROR_INVALID_ARGUMENT;
203 ip4_main_t *im = &ip4_main;
206 foreach_ip_interface_address (
207 &im->lookup_main, ia, sw_if_index, 0 /* honor unnumbered */, ({
209 ip_interface_address_get_address (&im->lookup_main, ia);
210 if (x->as_u32 == local_addr->ip4.as_u32)
212 /* valid address for this interface */
221 if (ip46_address_is_ip4 (peer_addr))
223 BFD_ERR ("IP family mismatch");
224 return VNET_API_ERROR_INVALID_ARGUMENT;
226 ip6_main_t *im = &ip6_main;
228 foreach_ip_interface_address (
229 &im->lookup_main, ia, sw_if_index, 0 /* honor unnumbered */, ({
231 ip_interface_address_get_address (&im->lookup_main, ia);
232 if (local_addr->ip6.as_u64[0] == x->as_u64[0] &&
233 local_addr->ip6.as_u64[1] == x->as_u64[1])
235 /* valid address for this interface */
245 BFD_ERR ("address not found on interface");
246 return VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
252 vnet_api_error_t bfd_udp_add_session (u32 sw_if_index, u32 desired_min_tx_us,
253 u32 required_min_rx_us, u8 detect_mult,
254 const ip46_address_t *local_addr,
255 const ip46_address_t *peer_addr,
258 vnet_api_error_t rv =
259 bfd_udp_validate_api_input (sw_if_index, local_addr, peer_addr);
266 BFD_ERR ("detect_mult < 1");
267 return VNET_API_ERROR_INVALID_ARGUMENT;
269 if (desired_min_tx_us < 1)
271 BFD_ERR ("desired_min_tx_us < 1");
272 return VNET_API_ERROR_INVALID_ARGUMENT;
274 return bfd_udp_add_session_internal (
275 &bfd_udp_main, sw_if_index, desired_min_tx_us, required_min_rx_us,
276 detect_mult, local_addr, peer_addr, bs_index);
279 vnet_api_error_t bfd_udp_del_session (u32 sw_if_index,
280 const ip46_address_t *local_addr,
281 const ip46_address_t *peer_addr)
283 vnet_api_error_t rv =
284 bfd_udp_validate_api_input (sw_if_index, local_addr, peer_addr);
289 bfd_udp_main_t *bum = &bfd_udp_main;
290 vnet_sw_interface_t *sw_if =
291 vnet_get_sw_interface (vnet_get_main (), sw_if_index);
293 memset (&key, 0, sizeof (key));
294 key.sw_if_index = sw_if->sw_if_index;
295 key.local_addr.as_u64[0] = local_addr->as_u64[0];
296 key.local_addr.as_u64[1] = local_addr->as_u64[1];
297 key.peer_addr.as_u64[0] = peer_addr->as_u64[0];
298 key.peer_addr.as_u64[1] = peer_addr->as_u64[1];
299 bfd_session_t *tmp = bfd_lookup_session (bum, &key);
302 BFD_DBG ("free bfd-udp session, bs_idx=%d", tmp->bs_idx);
303 mhash_unset (&bum->bfd_session_idx_by_bfd_key, &key, NULL);
304 adj_unlock (tmp->udp.adj_index);
305 bfd_put_session (bum->bfd_main, tmp);
309 BFD_ERR ("no such session");
310 return VNET_API_ERROR_BFD_NOENT;
316 BFD_UDP_INPUT_NEXT_NORMAL,
317 BFD_UDP_INPUT_NEXT_REPLY,
318 BFD_UDP_INPUT_N_NEXT,
319 } bfd_udp_input_next_t;
321 /* Packet counters */
322 #define foreach_bfd_udp_error(F) \
323 F (NONE, "good bfd packets (processed)") \
324 F (BAD, "invalid bfd packets") \
325 F (DISABLED, "bfd packets received on disabled interfaces")
327 #define F(sym, string) static char BFD_UDP_ERR_##sym##_STR[] = string;
328 foreach_bfd_udp_error (F);
331 static char *bfd_udp_error_strings[] = {
332 #define F(sym, string) BFD_UDP_ERR_##sym##_STR,
333 foreach_bfd_udp_error (F)
338 #define F(sym, str) BFD_UDP_ERROR_##sym,
339 foreach_bfd_udp_error (F)
344 static void bfd_udp4_find_headers (vlib_buffer_t *b, const ip4_header_t **ip4,
345 const udp_header_t **udp)
347 /* sanity check first */
348 const i32 start = vnet_buffer (b)->ip.start_of_ip_header;
349 if (start < 0 && start < sizeof (b->pre_data))
351 BFD_ERR ("Start of ip header is before pre_data, ignoring");
356 *ip4 = (ip4_header_t *)(b->data + start);
357 if ((u8 *)*ip4 > (u8 *)vlib_buffer_get_current (b))
359 BFD_ERR ("Start of ip header is beyond current data, ignoring");
364 *udp = (udp_header_t *)((*ip4) + 1);
367 static bfd_udp_error_t bfd_udp4_verify_transport (const ip4_header_t *ip4,
368 const udp_header_t *udp,
369 const bfd_session_t *bs)
371 const bfd_udp_session_t *bus = &bs->udp;
372 const bfd_udp_key_t *key = &bus->key;
373 if (ip4->src_address.as_u32 != key->peer_addr.ip4.as_u32)
375 BFD_ERR ("IPv4 src addr mismatch, got %U, expected %U",
376 format_ip4_address, ip4->src_address.as_u8, format_ip4_address,
377 key->peer_addr.ip4.as_u8);
378 return BFD_UDP_ERROR_BAD;
380 if (ip4->dst_address.as_u32 != key->local_addr.ip4.as_u32)
382 BFD_ERR ("IPv4 dst addr mismatch, got %U, expected %U",
383 format_ip4_address, ip4->dst_address.as_u8, format_ip4_address,
384 key->local_addr.ip4.as_u8);
385 return BFD_UDP_ERROR_BAD;
387 const u8 expected_ttl = 255;
388 if (ip4->ttl != expected_ttl)
390 BFD_ERR ("IPv4 unexpected TTL value %u, expected %u", ip4->ttl,
392 return BFD_UDP_ERROR_BAD;
394 if (clib_net_to_host_u16 (udp->src_port) < 49152 ||
395 clib_net_to_host_u16 (udp->src_port) > 65535)
397 BFD_ERR ("Invalid UDP src port %u, out of range <49152,65535>",
400 return BFD_UDP_ERROR_NONE;
409 static void bfd_rpc_update_session_cb (const bfd_rpc_update_t *a)
411 bfd_consume_pkt (bfd_udp_main.bfd_main, &a->pkt, a->bs_idx);
414 static void bfd_rpc_update_session (u32 bs_idx, const bfd_pkt_t *pkt)
416 /* packet length was already verified to be correct by the caller */
417 const u32 data_size = sizeof (bfd_rpc_update_t) -
418 STRUCT_SIZE_OF (bfd_rpc_update_t, pkt) +
421 bfd_rpc_update_t *update = (bfd_rpc_update_t *)data;
422 update->bs_idx = bs_idx;
423 clib_memcpy (&update->pkt, pkt, pkt->head.length);
424 vl_api_rpc_call_main_thread (bfd_rpc_update_session_cb, data, data_size);
427 static bfd_udp_error_t bfd_udp4_scan (vlib_main_t *vm, vlib_node_runtime_t *rt,
428 vlib_buffer_t *b, bfd_session_t **bs_out)
430 const bfd_pkt_t *pkt = vlib_buffer_get_current (b);
431 if (sizeof (*pkt) > b->current_length)
434 "Payload size %d too small to hold bfd packet of minimum size %d",
435 b->current_length, sizeof (*pkt));
436 return BFD_UDP_ERROR_BAD;
438 const ip4_header_t *ip4;
439 const udp_header_t *udp;
440 bfd_udp4_find_headers (b, &ip4, &udp);
443 BFD_ERR ("Couldn't find ip4 or udp header");
444 return BFD_UDP_ERROR_BAD;
446 if (!bfd_verify_pkt_common (pkt))
448 return BFD_UDP_ERROR_BAD;
450 bfd_session_t *bs = NULL;
453 BFD_DBG ("Looking up BFD session using discriminator %u",
455 bs = bfd_find_session_by_disc (bfd_udp_main.bfd_main, pkt->your_disc);
460 memset (&key, 0, sizeof (key));
461 key.sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
462 key.local_addr.ip4.as_u32 = ip4->dst_address.as_u32;
463 key.peer_addr.ip4.as_u32 = ip4->src_address.as_u32;
464 BFD_DBG ("Looking up BFD session using key (sw_if_index=%u, local=%U, "
466 key.sw_if_index, format_ip4_address, key.local_addr.ip4.as_u8,
467 format_ip4_address, key.peer_addr.ip4.as_u8);
468 bs = bfd_lookup_session (&bfd_udp_main, &key);
472 BFD_ERR ("BFD session lookup failed - no session matches BFD pkt");
473 return BFD_UDP_ERROR_BAD;
475 BFD_DBG ("BFD session found, bs_idx=%u", bs->bs_idx);
476 if (!bfd_verify_pkt_session (pkt, b->current_length, bs))
478 return BFD_UDP_ERROR_BAD;
481 if (BFD_UDP_ERROR_NONE != (err = bfd_udp4_verify_transport (ip4, udp, bs)))
485 bfd_rpc_update_session (bs->bs_idx, pkt);
487 return BFD_UDP_ERROR_NONE;
490 static void bfd_udp6_find_headers (vlib_buffer_t *b, const ip6_header_t **ip6,
491 const udp_header_t **udp)
493 /* sanity check first */
494 const i32 start = vnet_buffer (b)->ip.start_of_ip_header;
495 if (start < 0 && start < sizeof (b->pre_data))
497 BFD_ERR ("Start of ip header is before pre_data, ignoring");
502 *ip6 = (ip6_header_t *)(b->data + start);
503 if ((u8 *)*ip6 > (u8 *)vlib_buffer_get_current (b))
505 BFD_ERR ("Start of ip header is beyond current data, ignoring");
510 *udp = (udp_header_t *)((*ip6) + 1);
513 static bfd_udp_error_t bfd_udp6_verify_transport (const ip6_header_t *ip6,
514 const udp_header_t *udp,
515 const bfd_session_t *bs)
517 const bfd_udp_session_t *bus = &bs->udp;
518 const bfd_udp_key_t *key = &bus->key;
519 if (ip6->src_address.as_u64[0] != key->peer_addr.ip6.as_u64[0] &&
520 ip6->src_address.as_u64[1] != key->peer_addr.ip6.as_u64[1])
522 BFD_ERR ("IP src addr mismatch, got %U, expected %U", format_ip6_address,
523 ip6, format_ip6_address, &key->peer_addr.ip6);
524 return BFD_UDP_ERROR_BAD;
526 if (ip6->dst_address.as_u64[0] != key->local_addr.ip6.as_u64[0] &&
527 ip6->dst_address.as_u64[1] != key->local_addr.ip6.as_u64[1])
529 BFD_ERR ("IP dst addr mismatch, got %U, expected %U", format_ip6_address,
530 ip6, format_ip6_address, &key->local_addr.ip6);
531 return BFD_UDP_ERROR_BAD;
533 const u8 expected_hop_limit = 255;
534 if (ip6->hop_limit != expected_hop_limit)
536 BFD_ERR ("IPv6 unexpected hop-limit value %u, expected %u",
537 ip6->hop_limit, expected_hop_limit);
538 return BFD_UDP_ERROR_BAD;
540 if (clib_net_to_host_u16 (udp->src_port) < 49152 ||
541 clib_net_to_host_u16 (udp->src_port) > 65535)
543 BFD_ERR ("Invalid UDP src port %u, out of range <49152,65535>",
546 return BFD_UDP_ERROR_NONE;
549 static bfd_udp_error_t bfd_udp6_scan (vlib_main_t *vm, vlib_node_runtime_t *rt,
550 vlib_buffer_t *b, bfd_session_t **bs_out)
552 const bfd_pkt_t *pkt = vlib_buffer_get_current (b);
553 if (sizeof (*pkt) > b->current_length)
556 "Payload size %d too small to hold bfd packet of minimum size %d",
557 b->current_length, sizeof (*pkt));
558 return BFD_UDP_ERROR_BAD;
560 const ip6_header_t *ip6;
561 const udp_header_t *udp;
562 bfd_udp6_find_headers (b, &ip6, &udp);
565 BFD_ERR ("Couldn't find ip6 or udp header");
566 return BFD_UDP_ERROR_BAD;
568 if (!bfd_verify_pkt_common (pkt))
570 return BFD_UDP_ERROR_BAD;
572 bfd_session_t *bs = NULL;
575 BFD_DBG ("Looking up BFD session using discriminator %u",
577 bs = bfd_find_session_by_disc (bfd_udp_main.bfd_main, pkt->your_disc);
582 memset (&key, 0, sizeof (key));
583 key.sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
584 key.local_addr.ip6.as_u64[0] = ip6->dst_address.as_u64[0];
585 key.local_addr.ip6.as_u64[1] = ip6->dst_address.as_u64[1];
586 key.peer_addr.ip6.as_u64[0] = ip6->src_address.as_u64[0];
587 key.peer_addr.ip6.as_u64[1] = ip6->src_address.as_u64[1];
588 BFD_DBG ("Looking up BFD session using key (sw_if_index=%u, local=%U, "
590 key.sw_if_index, format_ip6_address, &key.local_addr,
591 format_ip6_address, &key.peer_addr);
592 bs = bfd_lookup_session (&bfd_udp_main, &key);
596 BFD_ERR ("BFD session lookup failed - no session matches BFD pkt");
597 return BFD_UDP_ERROR_BAD;
599 BFD_DBG ("BFD session found, bs_idx=%u", bs->bs_idx);
600 if (!bfd_verify_pkt_session (pkt, b->current_length, bs))
602 return BFD_UDP_ERROR_BAD;
605 if (BFD_UDP_ERROR_NONE != (err = bfd_udp6_verify_transport (ip6, udp, bs)))
609 bfd_rpc_update_session (bs->bs_idx, pkt);
611 return BFD_UDP_ERROR_NONE;
615 * Process a frame of bfd packets
616 * Expect 1 packet / frame
618 static uword bfd_udp_input (vlib_main_t *vm, vlib_node_runtime_t *rt,
619 vlib_frame_t *f, int is_ipv6)
621 u32 n_left_from, *from;
622 bfd_input_trace_t *t0;
624 from = vlib_frame_vector_args (f); /* array of buffer indices */
625 n_left_from = f->n_vectors; /* number of buffer indices */
627 while (n_left_from > 0)
634 b0 = vlib_get_buffer (vm, bi0);
636 bfd_session_t *bs = NULL;
638 /* If this pkt is traced, snapshot the data */
639 if (b0->flags & VLIB_BUFFER_IS_TRACED)
642 t0 = vlib_add_trace (vm, rt, b0, sizeof (*t0));
643 len = (b0->current_length < sizeof (t0->data)) ? b0->current_length
646 clib_memcpy (t0->data, vlib_buffer_get_current (b0), len);
649 /* scan this bfd pkt. error0 is the counter index to bmp */
652 error0 = bfd_udp6_scan (vm, rt, b0, &bs);
656 error0 = bfd_udp4_scan (vm, rt, b0, &bs);
658 b0->error = rt->errors[error0];
660 next0 = BFD_UDP_INPUT_NEXT_NORMAL;
661 if (BFD_UDP_ERROR_NONE == error0)
663 /* if everything went fine, check for poll bit, if present, re-use
664 the buffer and based on (now updated) session parameters, send the
666 const bfd_pkt_t *pkt = vlib_buffer_get_current (b0);
667 if (bfd_pkt_get_poll (pkt))
669 bfd_send_final (vm, b0, bs);
672 vlib_node_increment_counter (vm, bfd_udp6_input_node.index,
677 vlib_node_increment_counter (vm, bfd_udp4_input_node.index,
680 next0 = BFD_UDP_INPUT_NEXT_REPLY;
683 vlib_set_next_frame_buffer (vm, rt, next0, bi0);
692 static uword bfd_udp4_input (vlib_main_t *vm, vlib_node_runtime_t *rt,
695 return bfd_udp_input (vm, rt, f, 0);
699 * bfd input graph node declaration
702 VLIB_REGISTER_NODE (bfd_udp4_input_node, static) = {
703 .function = bfd_udp4_input,
704 .name = "bfd-udp4-input",
705 .vector_size = sizeof (u32),
706 .type = VLIB_NODE_TYPE_INTERNAL,
708 .n_errors = BFD_UDP_N_ERROR,
709 .error_strings = bfd_udp_error_strings,
711 .format_trace = bfd_input_format_trace,
713 .n_next_nodes = BFD_UDP_INPUT_N_NEXT,
716 [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop",
717 [BFD_UDP_INPUT_NEXT_REPLY] = "ip4-lookup",
722 static uword bfd_udp6_input (vlib_main_t *vm, vlib_node_runtime_t *rt,
725 return bfd_udp_input (vm, rt, f, 1);
729 VLIB_REGISTER_NODE (bfd_udp6_input_node, static) = {
730 .function = bfd_udp6_input,
731 .name = "bfd-udp6-input",
732 .vector_size = sizeof (u32),
733 .type = VLIB_NODE_TYPE_INTERNAL,
735 .n_errors = BFD_UDP_N_ERROR,
736 .error_strings = bfd_udp_error_strings,
738 .format_trace = bfd_input_format_trace,
740 .n_next_nodes = BFD_UDP_INPUT_N_NEXT,
743 [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop",
744 [BFD_UDP_INPUT_NEXT_REPLY] = "ip6-lookup",
749 static clib_error_t *bfd_sw_interface_up_down (vnet_main_t *vnm,
750 u32 sw_if_index, u32 flags)
752 // vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
753 if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
760 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (bfd_sw_interface_up_down);
762 static clib_error_t *bfd_hw_interface_up_down (vnet_main_t *vnm,
763 u32 hw_if_index, u32 flags)
765 if (flags & VNET_HW_INTERFACE_FLAG_LINK_UP)
772 VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION (bfd_hw_interface_up_down);
777 static clib_error_t *bfd_udp_init (vlib_main_t *vm)
779 mhash_init (&bfd_udp_main.bfd_session_idx_by_bfd_key, sizeof (uword),
780 sizeof (bfd_udp_key_t));
781 bfd_udp_main.bfd_main = &bfd_main;
782 udp_register_dst_port (vm, UDP_DST_PORT_bfd4, bfd_udp4_input_node.index, 1);
783 udp_register_dst_port (vm, UDP_DST_PORT_bfd6, bfd_udp6_input_node.index, 0);
787 VLIB_INIT_FUNCTION (bfd_udp_init);