X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fbfd%2Fbfd_udp.c;h=ebee590b7950107f72ee590dc461a832c942d2bd;hb=e50e8568c160f51cc2a268b59e209d13cb7344be;hp=8519009d13949b8cea3a3423e7758074dd536a9e;hpb=aeeac3bf4429235c952ce54abad7d3729be6a2f5;p=vpp.git diff --git a/src/vnet/bfd/bfd_udp.c b/src/vnet/bfd/bfd_udp.c index 8519009d139..ebee590b795 100644 --- a/src/vnet/bfd/bfd_udp.c +++ b/src/vnet/bfd/bfd_udp.c @@ -12,21 +12,28 @@ * See the License for the specific language governing permissions and * limitations under the License. */ +/** + * @file + * @brief BFD UDP transport layer implementation + */ #include #include #include #include #include #include -#include +#include +#include #include #include #include #include -#include #include #include #include +#include +#include +#include #include #include #include @@ -38,6 +45,20 @@ typedef struct /* hashmap - bfd session index by bfd key - used for CLI/API lookup, where * discriminator is unknown */ mhash_t bfd_session_idx_by_bfd_key; + /* convenience variable */ + vnet_main_t *vnet_main; + /* flag indicating whether echo_source_sw_if_index holds a valid value */ + int echo_source_is_set; + /* loopback interface used to get echo source ip */ + u32 echo_source_sw_if_index; + /* node index of "ip4-arp" node */ + u32 ip4_arp_idx; + /* node index of "ip6-discover-neighbor" node */ + u32 ip6_ndp_idx; + /* node index of "ip4-rewrite" node */ + u32 ip4_rewrite_idx; + /* node index of "ip6-rewrite" node */ + u32 ip6_rewrite_idx; } bfd_udp_main_t; static vlib_node_registration_t bfd_udp4_input_node; @@ -47,6 +68,81 @@ static vlib_node_registration_t bfd_udp_echo6_input_node; bfd_udp_main_t bfd_udp_main; +vnet_api_error_t +bfd_udp_set_echo_source (u32 sw_if_index) +{ + vnet_sw_interface_t *sw_if = + vnet_get_sw_interface_safe (bfd_udp_main.vnet_main, sw_if_index); + if (sw_if) + { + bfd_udp_main.echo_source_sw_if_index = sw_if_index; + bfd_udp_main.echo_source_is_set = 1; + return 0; + } + return VNET_API_ERROR_BFD_ENOENT; +} + +vnet_api_error_t +bfd_udp_del_echo_source (u32 sw_if_index) +{ + bfd_udp_main.echo_source_sw_if_index = ~0; + bfd_udp_main.echo_source_is_set = 0; + return 0; +} + +int +bfd_udp_is_echo_available (bfd_transport_e transport) +{ + if (!bfd_udp_main.echo_source_is_set) + { + BFD_DBG ("UDP echo source not set - echo not available"); + return 0; + } + /* + * for the echo to work, we need a loopback interface with at least one + * address with netmask length at most 31 (ip4) or 127 (ip6) so that we can + * pick an unused address from that subnet + */ + vnet_sw_interface_t *sw_if = + vnet_get_sw_interface_safe (bfd_udp_main.vnet_main, + bfd_udp_main.echo_source_sw_if_index); + if (sw_if && sw_if->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) + { + if (BFD_TRANSPORT_UDP4 == transport) + { + ip4_main_t *im = &ip4_main; + ip_interface_address_t *ia = NULL; + /* *INDENT-OFF* */ + foreach_ip_interface_address (&im->lookup_main, ia, + bfd_udp_main.echo_source_sw_if_index, + 0 /* honor unnumbered */, ({ + if (ia->address_length <= 31) + { + return 1; + } + })); + /* *INDENT-ON* */ + } + else if (BFD_TRANSPORT_UDP6 == transport) + { + ip6_main_t *im = &ip6_main; + ip_interface_address_t *ia = NULL; + /* *INDENT-OFF* */ + foreach_ip_interface_address (&im->lookup_main, ia, + bfd_udp_main.echo_source_sw_if_index, + 0 /* honor unnumbered */, ({ + if (ia->address_length <= 127) + { + return 1; + } + })); + /* *INDENT-ON* */ + } + } + BFD_DBG ("No usable IP address for UDP echo - echo not available"); + return 0; +} + static u16 bfd_udp_bs_idx_to_sport (u32 bs_idx) { @@ -61,16 +157,100 @@ bfd_udp_bs_idx_to_sport (u32 bs_idx) return 49152 + bs_idx % (65535 - 49152 + 1); } +int +bfd_udp_get_echo_src_ip4 (ip4_address_t * addr) +{ + if (!bfd_udp_main.echo_source_is_set) + { + BFD_ERR ("cannot find ip4 address, echo source not set"); + return 0; + } + ip_interface_address_t *ia = NULL; + ip4_main_t *im = &ip4_main; + + /* *INDENT-OFF* */ + foreach_ip_interface_address ( + &im->lookup_main, ia, bfd_udp_main.echo_source_sw_if_index, + 0 /* honor unnumbered */, ({ + ip4_address_t *x = + ip_interface_address_get_address (&im->lookup_main, ia); + if (ia->address_length <= 31) + { + addr->as_u32 = clib_host_to_net_u32 (x->as_u32); + /* + * flip the last bit to get a different address, might be network, + * we don't care ... + */ + addr->as_u32 ^= 1; + addr->as_u32 = clib_net_to_host_u32 (addr->as_u32); + return 1; + } + })); + /* *INDENT-ON* */ + BFD_ERR ("cannot find ip4 address, no usable address found"); + return 0; +} + +int +bfd_udp_get_echo_src_ip6 (ip6_address_t * addr) +{ + if (!bfd_udp_main.echo_source_is_set) + { + BFD_ERR ("cannot find ip6 address, echo source not set"); + return 0; + } + ip_interface_address_t *ia = NULL; + ip6_main_t *im = &ip6_main; + + /* *INDENT-OFF* */ + foreach_ip_interface_address ( + &im->lookup_main, ia, bfd_udp_main.echo_source_sw_if_index, + 0 /* honor unnumbered */, ({ + ip6_address_t *x = + ip_interface_address_get_address (&im->lookup_main, ia); + if (ia->address_length <= 127) + { + *addr = *x; + addr->as_u8[15] ^= 1; /* flip the last bit of the address */ + return 1; + } + })); + /* *INDENT-ON* */ + BFD_ERR ("cannot find ip6 address, no usable address found"); + return 0; +} + void -bfd_add_udp4_transport (vlib_main_t * vm, vlib_buffer_t * b, - const bfd_session_t * bs) +bfd_udp_get_echo_source (int *is_set, u32 * sw_if_index, int *have_usable_ip4, + ip4_address_t * ip4, int *have_usable_ip6, + ip6_address_t * ip6) +{ + if (bfd_udp_main.echo_source_is_set) + { + *is_set = 1; + *sw_if_index = bfd_udp_main.echo_source_sw_if_index; + *have_usable_ip4 = bfd_udp_get_echo_src_ip4 (ip4); + *have_usable_ip6 = bfd_udp_get_echo_src_ip6 (ip6); + } + else + { + *is_set = 0; + } +} + +int +bfd_add_udp4_transport (vlib_main_t * vm, u32 bi, + const bfd_session_t * bs, int is_echo) { const bfd_udp_session_t *bus = &bs->udp; const bfd_udp_key_t *key = &bus->key; + vlib_buffer_t *b = vlib_get_buffer (vm, bi); 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; + vnet_buffer (b)->sw_if_index[VLIB_RX] = 0; + vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0; typedef struct { ip4_header_t ip4; @@ -83,12 +263,24 @@ bfd_add_udp4_transport (vlib_main_t * vm, vlib_buffer_t * b, headers->ip4.ip_version_and_header_length = 0x45; headers->ip4.ttl = 255; headers->ip4.protocol = IP_PROTOCOL_UDP; - headers->ip4.src_address.as_u32 = key->local_addr.ip4.as_u32; - headers->ip4.dst_address.as_u32 = key->peer_addr.ip4.as_u32; - headers->udp.src_port = clib_host_to_net_u16 (bfd_udp_bs_idx_to_sport (bs->bs_idx)); - headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd4); + if (is_echo) + { + int rv; + if (!(rv = bfd_udp_get_echo_src_ip4 (&headers->ip4.src_address))) + { + return rv; + } + headers->ip4.dst_address.as_u32 = key->local_addr.ip4.as_u32; + headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd_echo4); + } + else + { + headers->ip4.src_address.as_u32 = key->local_addr.ip4.as_u32; + headers->ip4.dst_address.as_u32 = key->peer_addr.ip4.as_u32; + headers->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); @@ -98,18 +290,22 @@ bfd_add_udp4_transport (vlib_main_t * vm, vlib_buffer_t * b, const u16 udp_length = ip_length - (sizeof (headers->ip4)); headers->udp.length = clib_host_to_net_u16 (udp_length); + return 1; } -void -bfd_add_udp6_transport (vlib_main_t * vm, vlib_buffer_t * b, - const bfd_session_t * bs) +int +bfd_add_udp6_transport (vlib_main_t * vm, u32 bi, + const bfd_session_t * bs, int is_echo) { const bfd_udp_session_t *bus = &bs->udp; const bfd_udp_key_t *key = &bus->key; + vlib_buffer_t *b = vlib_get_buffer (vm, bi); 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; + vnet_buffer (b)->sw_if_index[VLIB_RX] = 0; + vnet_buffer (b)->sw_if_index[VLIB_TX] = 0; typedef struct { ip6_header_t ip6; @@ -123,14 +319,28 @@ bfd_add_udp6_transport (vlib_main_t * vm, vlib_buffer_t * b, clib_host_to_net_u32 (0x6 << 28); headers->ip6.hop_limit = 255; headers->ip6.protocol = IP_PROTOCOL_UDP; - clib_memcpy (&headers->ip6.src_address, &key->local_addr.ip6, - sizeof (headers->ip6.src_address)); - clib_memcpy (&headers->ip6.dst_address, &key->peer_addr.ip6, - sizeof (headers->ip6.dst_address)); - headers->udp.src_port = clib_host_to_net_u16 (bfd_udp_bs_idx_to_sport (bs->bs_idx)); - headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd6); + if (is_echo) + { + int rv; + if (!(rv = bfd_udp_get_echo_src_ip6 (&headers->ip6.src_address))) + { + return rv; + } + clib_memcpy (&headers->ip6.dst_address, &key->local_addr.ip6, + sizeof (headers->ip6.dst_address)); + + headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd_echo6); + } + else + { + clib_memcpy (&headers->ip6.src_address, &key->local_addr.ip6, + sizeof (headers->ip6.src_address)); + clib_memcpy (&headers->ip6.dst_address, &key->peer_addr.ip6, + sizeof (headers->ip6.dst_address)); + headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd6); + } /* fix ip payload length and udp length */ const u16 udp_length = @@ -147,6 +357,77 @@ bfd_add_udp6_transport (vlib_main_t * vm, vlib_buffer_t * b, { headers->udp.checksum = 0xffff; } + return 1; +} + +static void +bfd_create_frame_to_next_node (vlib_main_t * vm, u32 bi, u32 next_node) +{ + vlib_frame_t *f = vlib_get_frame_to_node (vm, next_node); + u32 *to_next = vlib_frame_vector_args (f); + to_next[0] = bi; + f->n_vectors = 1; + vlib_put_frame_to_node (vm, next_node, f); +} + +int +bfd_udp_calc_next_node (const struct bfd_session_s *bs, u32 * next_node) +{ + const bfd_udp_session_t *bus = &bs->udp; + ip_adjacency_t *adj = adj_get (bus->adj_index); + switch (adj->lookup_next_index) + { + case IP_LOOKUP_NEXT_ARP: + switch (bs->transport) + { + case BFD_TRANSPORT_UDP4: + *next_node = bfd_udp_main.ip4_arp_idx; + return 1; + case BFD_TRANSPORT_UDP6: + *next_node = bfd_udp_main.ip6_ndp_idx; + return 1; + } + break; + case IP_LOOKUP_NEXT_REWRITE: + switch (bs->transport) + { + case BFD_TRANSPORT_UDP4: + *next_node = bfd_udp_main.ip4_rewrite_idx; + return 1; + case BFD_TRANSPORT_UDP6: + *next_node = bfd_udp_main.ip6_rewrite_idx; + return 1; + } + break; + default: + /* drop */ + break; + } + return 0; +} + +int +bfd_transport_udp4 (vlib_main_t * vm, u32 bi, const struct bfd_session_s *bs) +{ + u32 next_node; + int rv = bfd_udp_calc_next_node (bs, &next_node); + if (rv) + { + bfd_create_frame_to_next_node (vm, bi, next_node); + } + return rv; +} + +int +bfd_transport_udp6 (vlib_main_t * vm, u32 bi, const struct bfd_session_s *bs) +{ + u32 next_node; + int rv = bfd_udp_calc_next_node (bs, &next_node); + if (rv) + { + bfd_create_frame_to_next_node (vm, bi, next_node); + } + return 1; } static bfd_session_t * @@ -182,12 +463,17 @@ bfd_udp_add_session_internal (bfd_udp_main_t * bum, u32 sw_if_index, bfd_session_t ** bs_out) { /* get a pool entry and if we end up not needing it, give it back */ - bfd_transport_t t = BFD_TRANSPORT_UDP4; + bfd_transport_e 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); + if (!bs) + { + bfd_put_session (bum->bfd_main, bs); + return VNET_API_ERROR_BFD_EAGAIN; + } bfd_udp_session_t *bus = &bs->udp; memset (bus, 0, sizeof (*bus)); bfd_udp_key_t *key = &bus->key; @@ -234,7 +520,7 @@ bfd_udp_validate_api_input (u32 sw_if_index, const ip46_address_t * peer_addr) { vnet_sw_interface_t *sw_if = - vnet_get_sw_interface (vnet_get_main (), sw_if_index); + vnet_get_sw_interface_safe (bfd_udp_main.vnet_main, sw_if_index); u8 local_ip_valid = 0; ip_interface_address_t *ia = NULL; if (!sw_if) @@ -460,97 +746,6 @@ bfd_udp_session_set_flags (u32 sw_if_index, return 0; } -vnet_api_error_t -bfd_auth_set_key (u32 conf_key_id, u8 auth_type, u8 key_len, - const u8 * key_data) -{ -#if WITH_LIBSSL > 0 - bfd_auth_key_t *auth_key = NULL; - if (!key_len || key_len > bfd_max_len_for_auth_type (auth_type)) - { - clib_warning ("Invalid authentication key length for auth_type=%d:%s " - "(key_len=%u, must be " - "non-zero, expected max=%u)", - auth_type, bfd_auth_type_str (auth_type), key_len, - (u32) bfd_max_len_for_auth_type (auth_type)); - return VNET_API_ERROR_INVALID_VALUE; - } - if (!bfd_auth_type_supported (auth_type)) - { - clib_warning ("Unsupported auth type=%d:%s", auth_type, - bfd_auth_type_str (auth_type)); - return VNET_API_ERROR_BFD_NOTSUPP; - } - bfd_main_t *bm = bfd_udp_main.bfd_main; - uword *key_idx_p = hash_get (bm->auth_key_by_conf_key_id, conf_key_id); - if (key_idx_p) - { - /* modifying existing key - must not be used */ - const uword key_idx = *key_idx_p; - auth_key = pool_elt_at_index (bm->auth_keys, key_idx); - if (auth_key->use_count > 0) - { - clib_warning ("Authentication key with conf ID %u in use by %u BFD " - "sessions - cannot modify", - conf_key_id, auth_key->use_count); - return VNET_API_ERROR_BFD_EINUSE; - } - } - else - { - /* adding new key */ - pool_get (bm->auth_keys, auth_key); - auth_key->conf_key_id = conf_key_id; - hash_set (bm->auth_key_by_conf_key_id, conf_key_id, - auth_key - bm->auth_keys); - } - auth_key->auth_type = auth_type; - memset (auth_key->key, 0, sizeof (auth_key->key)); - clib_memcpy (auth_key->key, key_data, key_len); - return 0; -#else - clib_warning ("SSL missing, cannot manipulate authentication keys"); - return VNET_API_ERROR_BFD_NOTSUPP; -#endif -} - -vnet_api_error_t -bfd_auth_del_key (u32 conf_key_id) -{ -#if WITH_LIBSSL > 0 - bfd_auth_key_t *auth_key = NULL; - bfd_main_t *bm = bfd_udp_main.bfd_main; - uword *key_idx_p = hash_get (bm->auth_key_by_conf_key_id, conf_key_id); - if (key_idx_p) - { - /* deleting existing key - must not be used */ - const uword key_idx = *key_idx_p; - auth_key = pool_elt_at_index (bm->auth_keys, key_idx); - if (auth_key->use_count > 0) - { - clib_warning ("Authentication key with conf ID %u in use by %u BFD " - "sessions - cannot delete", - conf_key_id, auth_key->use_count); - return VNET_API_ERROR_BFD_EINUSE; - } - hash_unset (bm->auth_key_by_conf_key_id, conf_key_id); - memset (auth_key, 0, sizeof (*auth_key)); - pool_put (bm->auth_keys, auth_key); - } - else - { - /* no such key */ - clib_warning ("Authentication key with conf ID %u does not exist", - conf_key_id); - return VNET_API_ERROR_BFD_ENOENT; - } - return 0; -#else - clib_warning ("SSL missing, cannot manipulate authentication keys"); - return VNET_API_ERROR_BFD_NOTSUPP; -#endif -} - vnet_api_error_t bfd_udp_auth_activate (u32 sw_if_index, const ip46_address_t * local_addr, @@ -592,7 +787,8 @@ bfd_udp_auth_deactivate (u32 sw_if_index, typedef enum { BFD_UDP_INPUT_NEXT_NORMAL, - BFD_UDP_INPUT_NEXT_REPLY, + BFD_UDP_INPUT_NEXT_REPLY_ARP, + BFD_UDP_INPUT_NEXT_REPLY_REWRITE, BFD_UDP_INPUT_N_NEXT, } bfd_udp_input_next_t; @@ -1001,7 +1197,11 @@ bfd_udp_input (vlib_main_t * vm, vlib_node_runtime_t * rt, const bfd_pkt_t *pkt = vlib_buffer_get_current (b0); if (bfd_pkt_get_poll (pkt)) { - bfd_init_final_control_frame (vm, b0, bs); + b0->current_data = 0; + b0->current_length = 0; + memset (vnet_buffer (b0), 0, sizeof (*vnet_buffer (b0))); + bfd_init_final_control_frame (vm, b0, bfd_udp_main.bfd_main, + bs, 0); if (is_ipv6) { vlib_node_increment_counter (vm, bfd_udp6_input_node.index, @@ -1012,7 +1212,20 @@ bfd_udp_input (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_node_increment_counter (vm, bfd_udp4_input_node.index, b0->error, 1); } - next0 = BFD_UDP_INPUT_NEXT_REPLY; + const bfd_udp_session_t *bus = &bs->udp; + ip_adjacency_t *adj = adj_get (bus->adj_index); + switch (adj->lookup_next_index) + { + case IP_LOOKUP_NEXT_ARP: + next0 = BFD_UDP_INPUT_NEXT_REPLY_ARP; + break; + case IP_LOOKUP_NEXT_REWRITE: + next0 = BFD_UDP_INPUT_NEXT_REPLY_REWRITE; + break; + default: + /* drop */ + break; + } } } vlib_set_next_frame_buffer (vm, rt, next0, bi0); @@ -1049,7 +1262,8 @@ VLIB_REGISTER_NODE (bfd_udp4_input_node, static) = { .next_nodes = { [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop", - [BFD_UDP_INPUT_NEXT_REPLY] = "ip4-lookup", + [BFD_UDP_INPUT_NEXT_REPLY_ARP] = "ip4-arp", + [BFD_UDP_INPUT_NEXT_REPLY_REWRITE] = "ip4-lookup", }, }; /* *INDENT-ON* */ @@ -1076,49 +1290,12 @@ VLIB_REGISTER_NODE (bfd_udp6_input_node, static) = { .next_nodes = { [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop", - [BFD_UDP_INPUT_NEXT_REPLY] = "ip6-lookup", + [BFD_UDP_INPUT_NEXT_REPLY_ARP] = "ip6-discover-neighbor", + [BFD_UDP_INPUT_NEXT_REPLY_REWRITE] = "ip6-lookup", }, }; /* *INDENT-ON* */ -/** - * @brief swap the source and destination IP addresses in the packet - */ -static int -bfd_echo_address_swap (vlib_buffer_t * b, int is_ipv6) -{ - udp_header_t *dummy = NULL; - if (is_ipv6) - { - ip6_header_t *ip6 = NULL; - bfd_udp6_find_headers (b, &ip6, &dummy); - if (!ip6) - { - return 0; - } - ip6_address_t tmp = ip6->dst_address; - ip6->dst_address = ip6->src_address; - ip6->src_address = tmp; - vlib_buffer_advance (b, - (u8 *) ip6 - (u8 *) vlib_buffer_get_current (b)); - } - else - { - ip4_header_t *ip4 = NULL; - bfd_udp4_find_headers (b, &ip4, &dummy); - if (!ip4) - { - return 0; - } - ip4_address_t tmp = ip4->dst_address; - ip4->dst_address = ip4->src_address; - ip4->src_address = tmp; - vlib_buffer_advance (b, - (u8 *) ip4 - (u8 *) vlib_buffer_get_current (b)); - } - return 1; -} - /* * Process a frame of bfd echo packets * Expect 1 packet / frame @@ -1153,7 +1330,12 @@ bfd_udp_echo_input (vlib_main_t * vm, vlib_node_runtime_t * rt, clib_memcpy (t0->data, vlib_buffer_get_current (b0), len); } - if (bfd_echo_address_swap (b0, is_ipv6)) + if (bfd_consume_echo_pkt (bfd_udp_main.bfd_main, b0)) + { + b0->error = rt->errors[BFD_UDP_ERROR_NONE]; + next0 = BFD_UDP_INPUT_NEXT_NORMAL; + } + else { /* loop back the packet */ b0->error = rt->errors[BFD_UDP_ERROR_NONE]; @@ -1167,12 +1349,7 @@ bfd_udp_echo_input (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_node_increment_counter (vm, bfd_udp_echo4_input_node.index, b0->error, 1); } - next0 = BFD_UDP_INPUT_NEXT_REPLY; - } - else - { - b0->error = rt->errors[BFD_UDP_ERROR_BAD]; - next0 = BFD_UDP_INPUT_NEXT_NORMAL; + next0 = BFD_UDP_INPUT_NEXT_REPLY_REWRITE; } vlib_set_next_frame_buffer (vm, rt, next0, bi0); @@ -1226,7 +1403,8 @@ VLIB_REGISTER_NODE (bfd_udp_echo4_input_node, static) = { .next_nodes = { [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop", - [BFD_UDP_INPUT_NEXT_REPLY] = "ip4-lookup", + [BFD_UDP_INPUT_NEXT_REPLY_ARP] = "ip4-arp", + [BFD_UDP_INPUT_NEXT_REPLY_REWRITE] = "ip4-lookup", }, }; /* *INDENT-ON* */ @@ -1254,7 +1432,8 @@ VLIB_REGISTER_NODE (bfd_udp_echo6_input_node, static) = { .next_nodes = { [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop", - [BFD_UDP_INPUT_NEXT_REPLY] = "ip6-lookup", + [BFD_UDP_INPUT_NEXT_REPLY_ARP] = "ip6-discover-neighbor", + [BFD_UDP_INPUT_NEXT_REPLY_REWRITE] = "ip6-lookup", }, }; @@ -1294,12 +1473,26 @@ 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; + bfd_udp_main.vnet_main = vnet_get_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); udp_register_dst_port (vm, UDP_DST_PORT_bfd_echo4, bfd_udp_echo4_input_node.index, 1); udp_register_dst_port (vm, UDP_DST_PORT_bfd_echo6, bfd_udp_echo6_input_node.index, 0); + vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip4-arp"); + ASSERT (node); + bfd_udp_main.ip4_arp_idx = node->index; + node = vlib_get_node_by_name (vm, (u8 *) "ip6-discover-neighbor"); + ASSERT (node); + bfd_udp_main.ip6_ndp_idx = node->index; + node = vlib_get_node_by_name (vm, (u8 *) "ip4-rewrite"); + ASSERT (node); + bfd_udp_main.ip4_rewrite_idx = node->index; + node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite"); + ASSERT (node); + bfd_udp_main.ip6_rewrite_idx = node->index; + return 0; }