X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fip%2Fip6_forward.c;h=067db77c412441048c1945892d7aa879f767ab9b;hb=c4abafd83;hp=6df3d4b036b5b94705dc0b2e6862188ca17a4930;hpb=1cf0007f394fde9beda3aa5150aac581a1075cf2;p=vpp.git diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c index 6df3d4b036b..067db77c412 100644 --- a/src/vnet/ip/ip6_forward.c +++ b/src/vnet/ip/ip6_forward.c @@ -60,22 +60,53 @@ #define OI_DECAP 0x80000000 static void -ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index, - ip6_main_t * im, u32 fib_index, - ip_interface_address_t * a) +ip6_add_interface_prefix_routes (ip6_main_t * im, + u32 sw_if_index, + u32 fib_index, + ip6_address_t * address, u32 address_length) { ip_lookup_main_t *lm = &im->lookup_main; - ip6_address_t *address = ip_interface_address_get_address (lm, a); - fib_prefix_t pfx = { - .fp_len = a->address_length, - .fp_proto = FIB_PROTOCOL_IP6, - .fp_addr.ip6 = *address, + ip_interface_prefix_t *if_prefix; + + ip_interface_prefix_key_t key = { + .prefix = { + .fp_len = address_length, + .fp_proto = FIB_PROTOCOL_IP6, + .fp_addr.ip6 = { + .as_u64 = { + address->as_u64[0] & + im->fib_masks[address_length]. + as_u64[0], + address-> + as_u64[1] & + im->fib_masks[address_length]. + as_u64[1], + }, + }, + }, + .sw_if_index = sw_if_index, }; - if (a->address_length < 128) + /* If prefix already set on interface, just increment ref count & return */ + if_prefix = ip_get_interface_prefix (lm, &key); + if (if_prefix) + { + if_prefix->ref_count += 1; + return; + } + + /* New prefix - allocate a pool entry, initialize it, add to the hash */ + pool_get (lm->if_prefix_pool, if_prefix); + if_prefix->ref_count = 1; + clib_memcpy (&if_prefix->key, &key, sizeof (key)); + mhash_set (&lm->prefix_to_if_prefix_index, &key, + if_prefix - lm->if_prefix_pool, 0 /* old value */ ); + + /* length < 128 - add glean */ + if (address_length < 128) { - fib_table_entry_update_one_path (fib_index, - &pfx, + /* set the glean route for the prefix */ + fib_table_entry_update_one_path (fib_index, &key.prefix, FIB_SOURCE_INTERFACE, (FIB_ENTRY_FLAG_CONNECTED | FIB_ENTRY_FLAG_ATTACHED), @@ -84,9 +115,27 @@ ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index, NULL, sw_if_index, /* invalid FIB index */ ~0, 1, - /* no label stack */ + /* no out-label stack */ NULL, FIB_ROUTE_PATH_FLAG_NONE); } +} + +static void +ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index, + ip6_main_t * im, u32 fib_index, + ip_interface_address_t * a) +{ + ip_lookup_main_t *lm = &im->lookup_main; + ip6_address_t *address = ip_interface_address_get_address (lm, a); + fib_prefix_t pfx = { + .fp_len = a->address_length, + .fp_proto = FIB_PROTOCOL_IP6, + .fp_addr.ip6 = *address, + }; + + /* set special routes for the prefix if needed */ + ip6_add_interface_prefix_routes (im, sw_if_index, fib_index, + address, a->address_length); pfx.fp_len = 128; if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index)) @@ -121,23 +170,73 @@ ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index, } static void -ip6_del_interface_routes (ip6_main_t * im, +ip6_del_interface_prefix_routes (ip6_main_t * im, + u32 sw_if_index, + u32 fib_index, + ip6_address_t * address, u32 address_length) +{ + ip_lookup_main_t *lm = &im->lookup_main; + ip_interface_prefix_t *if_prefix; + + ip_interface_prefix_key_t key = { + .prefix = { + .fp_len = address_length, + .fp_proto = FIB_PROTOCOL_IP6, + .fp_addr.ip6 = { + .as_u64 = { + address->as_u64[0] & + im->fib_masks[address_length]. + as_u64[0], + address-> + as_u64[1] & + im->fib_masks[address_length]. + as_u64[1], + }, + }, + }, + .sw_if_index = sw_if_index, + }; + + if_prefix = ip_get_interface_prefix (lm, &key); + if (!if_prefix) + { + clib_warning ("Prefix not found while deleting %U", + format_ip4_address_and_length, address, address_length); + return; + } + + /* If not deleting last intf addr in prefix, decrement ref count & return */ + if_prefix->ref_count -= 1; + if (if_prefix->ref_count > 0) + return; + + /* length <= 30, delete glean route */ + if (address_length <= 128) + { + /* remove glean route for prefix */ + fib_table_entry_delete (fib_index, &key.prefix, FIB_SOURCE_INTERFACE); + + } + + mhash_unset (&lm->prefix_to_if_prefix_index, &key, 0 /* old_value */ ); + pool_put (lm->if_prefix_pool, if_prefix); +} + +static void +ip6_del_interface_routes (u32 sw_if_index, ip6_main_t * im, u32 fib_index, ip6_address_t * address, u32 address_length) { fib_prefix_t pfx = { - .fp_len = address_length, + .fp_len = 128, .fp_proto = FIB_PROTOCOL_IP6, .fp_addr.ip6 = *address, }; - if (pfx.fp_len < 128) - { - fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE); - - } + /* delete special routes for the prefix if needed */ + ip6_del_interface_prefix_routes (im, sw_if_index, fib_index, + address, address_length); - pfx.fp_len = 128; fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE); } @@ -278,6 +377,13 @@ ip6_add_del_interface_address (vlib_main_t * vm, address, address_length)) { + /* an intf may have >1 addr from the same prefix */ + if ((sw_if_index == sif->sw_if_index) && + (ia->address_length == address_length) && + !ip6_address_is_equal (x, address)) + continue; + + /* error if the length or intf was different */ vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS; return clib_error_create @@ -311,7 +417,8 @@ ip6_add_del_interface_address (vlib_main_t * vm, ip6_sw_interface_enable_disable (sw_if_index, !is_del); if (is_del) - ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length); + ip6_del_interface_routes (sw_if_index, + im, ip6_af.fib_index, address, address_length); else ip6_add_interface_routes (vnm, sw_if_index, im, ip6_af.fib_index, @@ -361,7 +468,7 @@ ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags) im, fib_index, ia); else - ip6_del_interface_routes (im, fib_index, + ip6_del_interface_routes (sw_if_index, im, fib_index, a, ia->address_length); })); /* *INDENT-ON* */ @@ -564,212 +671,171 @@ VLIB_NODE_FN (ip6_load_balance_node) (vlib_main_t * vm, vlib_frame_t * frame) { vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters; - u32 n_left_from, n_left_to_next, *from, *to_next; - ip_lookup_next_t next; + u32 n_left, *from; u32 thread_index = vm->thread_index; ip6_main_t *im = &ip6_main; + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; + u16 nexts[VLIB_FRAME_SIZE], *next; from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; - next = node->cached_next_index; + n_left = frame->n_vectors; + next = nexts; - while (n_left_from > 0) - { - vlib_get_next_frame (vm, node, next, to_next, n_left_to_next); + vlib_get_buffers (vm, from, bufs, n_left); + while (n_left >= 4) + { + const load_balance_t *lb0, *lb1; + const ip6_header_t *ip0, *ip1; + u32 lbi0, hc0, lbi1, hc1; + const dpo_id_t *dpo0, *dpo1; - while (n_left_from >= 4 && n_left_to_next >= 2) + /* Prefetch next iteration. */ + { + vlib_prefetch_buffer_header (b[2], STORE); + vlib_prefetch_buffer_header (b[3], STORE); + + CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE); + CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE); + } + + ip0 = vlib_buffer_get_current (b[0]); + ip1 = vlib_buffer_get_current (b[1]); + lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX]; + lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX]; + + lb0 = load_balance_get (lbi0); + lb1 = load_balance_get (lbi1); + + /* + * this node is for via FIBs we can re-use the hash value from the + * to node if present. + * We don't want to use the same hash value at each level in the recursion + * graph as that would lead to polarisation + */ + hc0 = hc1 = 0; + + if (PREDICT_FALSE (lb0->lb_n_buckets > 1)) { - ip_lookup_next_t next0, next1; - const load_balance_t *lb0, *lb1; - vlib_buffer_t *p0, *p1; - u32 pi0, lbi0, hc0, pi1, lbi1, hc1; - const ip6_header_t *ip0, *ip1; - const dpo_id_t *dpo0, *dpo1; - - /* Prefetch next iteration. */ - { - vlib_buffer_t *p2, *p3; - - p2 = vlib_get_buffer (vm, from[2]); - p3 = vlib_get_buffer (vm, from[3]); - - vlib_prefetch_buffer_header (p2, STORE); - vlib_prefetch_buffer_header (p3, STORE); - - CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE); - CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE); - } - - pi0 = to_next[0] = from[0]; - pi1 = to_next[1] = from[1]; - - from += 2; - n_left_from -= 2; - to_next += 2; - n_left_to_next -= 2; - - p0 = vlib_get_buffer (vm, pi0); - p1 = vlib_get_buffer (vm, pi1); - - ip0 = vlib_buffer_get_current (p0); - ip1 = vlib_buffer_get_current (p1); - lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; - lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX]; - - lb0 = load_balance_get (lbi0); - lb1 = load_balance_get (lbi1); - - /* - * this node is for via FIBs we can re-use the hash value from the - * to node if present. - * We don't want to use the same hash value at each level in the recursion - * graph as that would lead to polarisation - */ - hc0 = hc1 = 0; - - if (PREDICT_FALSE (lb0->lb_n_buckets > 1)) + if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash)) { - if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash)) - { - hc0 = vnet_buffer (p0)->ip.flow_hash = - vnet_buffer (p0)->ip.flow_hash >> 1; - } - else - { - hc0 = vnet_buffer (p0)->ip.flow_hash = - ip6_compute_flow_hash (ip0, lb0->lb_hash_config); - } - dpo0 = - load_balance_get_fwd_bucket (lb0, - (hc0 & - lb0->lb_n_buckets_minus_1)); + hc0 = vnet_buffer (b[0])->ip.flow_hash = + vnet_buffer (b[0])->ip.flow_hash >> 1; } else { - dpo0 = load_balance_get_bucket_i (lb0, 0); + hc0 = vnet_buffer (b[0])->ip.flow_hash = + ip6_compute_flow_hash (ip0, lb0->lb_hash_config); } - if (PREDICT_FALSE (lb1->lb_n_buckets > 1)) + dpo0 = load_balance_get_fwd_bucket + (lb0, (hc0 & (lb0->lb_n_buckets_minus_1))); + } + else + { + dpo0 = load_balance_get_bucket_i (lb0, 0); + } + if (PREDICT_FALSE (lb1->lb_n_buckets > 1)) + { + if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash)) { - if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash)) - { - hc1 = vnet_buffer (p1)->ip.flow_hash = - vnet_buffer (p1)->ip.flow_hash >> 1; - } - else - { - hc1 = vnet_buffer (p1)->ip.flow_hash = - ip6_compute_flow_hash (ip1, lb1->lb_hash_config); - } - dpo1 = - load_balance_get_fwd_bucket (lb1, - (hc1 & - lb1->lb_n_buckets_minus_1)); + hc1 = vnet_buffer (b[1])->ip.flow_hash = + vnet_buffer (b[1])->ip.flow_hash >> 1; } else { - dpo1 = load_balance_get_bucket_i (lb1, 0); + hc1 = vnet_buffer (b[1])->ip.flow_hash = + ip6_compute_flow_hash (ip1, lb1->lb_hash_config); } + dpo1 = load_balance_get_fwd_bucket + (lb1, (hc1 & (lb1->lb_n_buckets_minus_1))); + } + else + { + dpo1 = load_balance_get_bucket_i (lb1, 0); + } - next0 = dpo0->dpoi_next_node; - next1 = dpo1->dpoi_next_node; - - /* Only process the HBH Option Header if explicitly configured to do so */ - if (PREDICT_FALSE - (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS)) - { - next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ? - (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0; - } - /* Only process the HBH Option Header if explicitly configured to do so */ - if (PREDICT_FALSE - (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS)) - { - next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ? - (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1; - } - - vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; - vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index; - - vlib_increment_combined_counter - (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0)); - vlib_increment_combined_counter - (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1)); + next[0] = dpo0->dpoi_next_node; + next[1] = dpo1->dpoi_next_node; - vlib_validate_buffer_enqueue_x2 (vm, node, next, - to_next, n_left_to_next, - pi0, pi1, next0, next1); + /* Only process the HBH Option Header if explicitly configured to do so */ + if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS)) + { + next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ? + (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0]; } - - while (n_left_from > 0 && n_left_to_next > 0) + /* Only process the HBH Option Header if explicitly configured to do so */ + if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS)) { - ip_lookup_next_t next0; - const load_balance_t *lb0; - vlib_buffer_t *p0; - u32 pi0, lbi0, hc0; - const ip6_header_t *ip0; - const dpo_id_t *dpo0; + next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ? + (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1]; + } - pi0 = from[0]; - to_next[0] = pi0; - from += 1; - to_next += 1; - n_left_to_next -= 1; - n_left_from -= 1; + vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; + vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index; - p0 = vlib_get_buffer (vm, pi0); + vlib_increment_combined_counter + (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0])); + vlib_increment_combined_counter + (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1])); - ip0 = vlib_buffer_get_current (p0); - lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; + b += 2; + next += 2; + n_left -= 2; + } + + while (n_left > 0) + { + const load_balance_t *lb0; + const ip6_header_t *ip0; + const dpo_id_t *dpo0; + u32 lbi0, hc0; + + ip0 = vlib_buffer_get_current (b[0]); + lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX]; - lb0 = load_balance_get (lbi0); + lb0 = load_balance_get (lbi0); - hc0 = 0; - if (PREDICT_FALSE (lb0->lb_n_buckets > 1)) + hc0 = 0; + if (PREDICT_FALSE (lb0->lb_n_buckets > 1)) + { + if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash)) { - if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash)) - { - hc0 = vnet_buffer (p0)->ip.flow_hash = - vnet_buffer (p0)->ip.flow_hash >> 1; - } - else - { - hc0 = vnet_buffer (p0)->ip.flow_hash = - ip6_compute_flow_hash (ip0, lb0->lb_hash_config); - } - dpo0 = - load_balance_get_fwd_bucket (lb0, - (hc0 & - lb0->lb_n_buckets_minus_1)); + hc0 = vnet_buffer (b[0])->ip.flow_hash = + vnet_buffer (b[0])->ip.flow_hash >> 1; } else { - dpo0 = load_balance_get_bucket_i (lb0, 0); - } - - next0 = dpo0->dpoi_next_node; - vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; - - /* Only process the HBH Option Header if explicitly configured to do so */ - if (PREDICT_FALSE - (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS)) - { - next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ? - (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0; + hc0 = vnet_buffer (b[0])->ip.flow_hash = + ip6_compute_flow_hash (ip0, lb0->lb_hash_config); } + dpo0 = load_balance_get_fwd_bucket + (lb0, (hc0 & (lb0->lb_n_buckets_minus_1))); + } + else + { + dpo0 = load_balance_get_bucket_i (lb0, 0); + } - vlib_increment_combined_counter - (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0)); + next[0] = dpo0->dpoi_next_node; + vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; - vlib_validate_buffer_enqueue_x1 (vm, node, next, - to_next, n_left_to_next, - pi0, next0); + /* Only process the HBH Option Header if explicitly configured to do so */ + if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS)) + { + next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ? + (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0]; } - vlib_put_next_frame (vm, node, next, n_left_to_next); + vlib_increment_combined_counter + (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0])); + + b += 1; + next += 1; + n_left -= 1; } + vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); + if (node->flags & VLIB_NODE_FLAG_TRACE) ip6_forward_next_trace (vm, node, frame, VLIB_TX); @@ -951,7 +1017,8 @@ ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, u16 sum16, payload_length_host_byte_order; u32 i, n_this_buffer, n_bytes_left; u32 headers_size = sizeof (ip0[0]); - void *data_this_buffer; + u8 *data_this_buffer; + u8 length_odd; ASSERT (bogus_lengthp); *bogus_lengthp = 0; @@ -959,7 +1026,7 @@ ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, /* Initialize checksum with ip header. */ sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol); payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length); - data_this_buffer = (void *) (ip0 + 1); + data_this_buffer = (u8 *) (ip0 + 1); for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++) { @@ -993,10 +1060,18 @@ ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, } n_bytes_left = n_this_buffer = payload_length_host_byte_order; - if (p0 && n_this_buffer + headers_size > p0->current_length) - n_this_buffer = - p0->current_length > - headers_size ? p0->current_length - headers_size : 0; + + if (p0) + { + u32 n_ip_bytes_this_buffer = + p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data); + if (n_this_buffer + headers_size > n_ip_bytes_this_buffer) + { + n_this_buffer = p0->current_length > headers_size ? + n_ip_bytes_this_buffer - headers_size : 0; + } + } + while (1) { sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer); @@ -1004,14 +1079,27 @@ ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, if (n_bytes_left == 0) break; + ASSERT (p0->flags & VLIB_BUFFER_NEXT_PRESENT); if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT)) { *bogus_lengthp = 1; return 0xfefe; } + + length_odd = (n_this_buffer & 1); + p0 = vlib_get_buffer (vm, p0->next_buffer); data_this_buffer = vlib_buffer_get_current (p0); n_this_buffer = clib_min (p0->current_length, n_bytes_left); + + if (PREDICT_FALSE (length_odd)) + { + /* Prepend a 0 or the resulting checksum will be incorrect. */ + data_this_buffer--; + n_this_buffer++; + n_bytes_left++; + data_this_buffer[0] = 0; + } } sum16 = ~ip_csum_fold (sum0); @@ -1066,7 +1154,7 @@ ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i) (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX]; - lbi = ip6_fib_table_fwding_lookup (im, fib_index, &i->src_address); + lbi = ip6_fib_table_fwding_lookup (fib_index, &i->src_address); lb0 = load_balance_get (lbi); return (fib_urpf_check_size (lb0->lb_urpf)); @@ -1474,6 +1562,16 @@ ip6_register_protocol (u32 protocol, u32 node_index) vlib_node_add_next (vm, ip6_local_node.index, node_index); } +void +ip6_unregister_protocol (u32 protocol) +{ + ip6_main_t *im = &ip6_main; + ip_lookup_main_t *lm = &im->lookup_main; + + ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol)); + lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT; +} + clib_error_t * ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index, u8 refresh)