| /* |
| * Copyright (c) 2016 Cisco and/or its affiliates. |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * ip/ip6_forward.c: IP v6 forwarding |
| * |
| * Copyright (c) 2008 Eliot Dresselhaus |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sublicense, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include <vnet/vnet.h> |
| #include <vnet/ip/ip.h> |
| #include <vnet/ip/ip6_neighbor.h> |
| #include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */ |
| #include <vnet/srp/srp.h> /* for srp_hw_interface_class */ |
| #include <vppinfra/cache.h> |
| #include <vnet/fib/fib_urpf_list.h> /* for FIB uRPF check */ |
| #include <vnet/fib/ip6_fib.h> |
| #include <vnet/mfib/ip6_mfib.h> |
| #include <vnet/dpo/load_balance_map.h> |
| #include <vnet/dpo/classify_dpo.h> |
| |
| #include <vppinfra/bihash_template.c> |
| |
| /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */ |
| #define OI_DECAP 0x80000000 |
| |
| /** |
| * @file |
| * @brief IPv6 Forwarding. |
| * |
| * This file contains the source code for IPv6 forwarding. |
| */ |
| |
| void |
| ip6_forward_next_trace (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame, |
| vlib_rx_or_tx_t which_adj_index); |
| |
| always_inline uword |
| ip6_lookup_inline (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| ip6_main_t *im = &ip6_main; |
| vlib_combined_counter_main_t *cm = &load_balance_main.lbm_to_counters; |
| u32 n_left_from, n_left_to_next, *from, *to_next; |
| ip_lookup_next_t next; |
| u32 thread_index = vlib_get_thread_index (); |
| |
| from = vlib_frame_vector_args (frame); |
| n_left_from = frame->n_vectors; |
| next = node->cached_next_index; |
| |
| while (n_left_from > 0) |
| { |
| vlib_get_next_frame (vm, node, next, to_next, n_left_to_next); |
| |
| while (n_left_from >= 4 && n_left_to_next >= 2) |
| { |
| vlib_buffer_t *p0, *p1; |
| u32 pi0, pi1, lbi0, lbi1, wrong_next; |
| ip_lookup_next_t next0, next1; |
| ip6_header_t *ip0, *ip1; |
| ip6_address_t *dst_addr0, *dst_addr1; |
| u32 fib_index0, fib_index1; |
| u32 flow_hash_config0, flow_hash_config1; |
| const dpo_id_t *dpo0, *dpo1; |
| const load_balance_t *lb0, *lb1; |
| |
| /* 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, LOAD); |
| vlib_prefetch_buffer_header (p3, LOAD); |
| CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD); |
| CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD); |
| } |
| |
| pi0 = to_next[0] = from[0]; |
| pi1 = to_next[1] = from[1]; |
| |
| p0 = vlib_get_buffer (vm, pi0); |
| p1 = vlib_get_buffer (vm, pi1); |
| |
| ip0 = vlib_buffer_get_current (p0); |
| ip1 = vlib_buffer_get_current (p1); |
| |
| dst_addr0 = &ip0->dst_address; |
| dst_addr1 = &ip1->dst_address; |
| |
| fib_index0 = |
| vec_elt (im->fib_index_by_sw_if_index, |
| vnet_buffer (p0)->sw_if_index[VLIB_RX]); |
| fib_index1 = |
| vec_elt (im->fib_index_by_sw_if_index, |
| vnet_buffer (p1)->sw_if_index[VLIB_RX]); |
| |
| fib_index0 = (vnet_buffer (p0)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? |
| fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX]; |
| fib_index1 = (vnet_buffer (p1)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? |
| fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX]; |
| |
| lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0); |
| lbi1 = ip6_fib_table_fwding_lookup (im, fib_index1, dst_addr1); |
| |
| lb0 = load_balance_get (lbi0); |
| lb1 = load_balance_get (lbi1); |
| ASSERT (lb0->lb_n_buckets > 0); |
| ASSERT (lb1->lb_n_buckets > 0); |
| ASSERT (is_pow2 (lb0->lb_n_buckets)); |
| ASSERT (is_pow2 (lb1->lb_n_buckets)); |
| |
| vnet_buffer (p0)->ip.flow_hash = vnet_buffer (p1)->ip.flow_hash = 0; |
| |
| if (PREDICT_FALSE (lb0->lb_n_buckets > 1)) |
| { |
| flow_hash_config0 = lb0->lb_hash_config; |
| vnet_buffer (p0)->ip.flow_hash = |
| ip6_compute_flow_hash (ip0, flow_hash_config0); |
| dpo0 = |
| load_balance_get_fwd_bucket (lb0, |
| (vnet_buffer (p0)->ip.flow_hash & |
| (lb0->lb_n_buckets_minus_1))); |
| } |
| else |
| { |
| dpo0 = load_balance_get_bucket_i (lb0, 0); |
| } |
| if (PREDICT_FALSE (lb1->lb_n_buckets > 1)) |
| { |
| flow_hash_config1 = lb1->lb_hash_config; |
| vnet_buffer (p1)->ip.flow_hash = |
| ip6_compute_flow_hash (ip1, flow_hash_config1); |
| dpo1 = |
| load_balance_get_fwd_bucket (lb1, |
| (vnet_buffer (p1)->ip.flow_hash & |
| (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; |
| } |
| 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)); |
| |
| from += 2; |
| to_next += 2; |
| n_left_to_next -= 2; |
| n_left_from -= 2; |
| |
| wrong_next = (next0 != next) + 2 * (next1 != next); |
| if (PREDICT_FALSE (wrong_next != 0)) |
| { |
| switch (wrong_next) |
| { |
| case 1: |
| /* A B A */ |
| to_next[-2] = pi1; |
| to_next -= 1; |
| n_left_to_next += 1; |
| vlib_set_next_frame_buffer (vm, node, next0, pi0); |
| break; |
| |
| case 2: |
| /* A A B */ |
| to_next -= 1; |
| n_left_to_next += 1; |
| vlib_set_next_frame_buffer (vm, node, next1, pi1); |
| break; |
| |
| case 3: |
| /* A B C */ |
| to_next -= 2; |
| n_left_to_next += 2; |
| vlib_set_next_frame_buffer (vm, node, next0, pi0); |
| vlib_set_next_frame_buffer (vm, node, next1, pi1); |
| if (next0 == next1) |
| { |
| /* A B B */ |
| vlib_put_next_frame (vm, node, next, n_left_to_next); |
| next = next1; |
| vlib_get_next_frame (vm, node, next, to_next, |
| n_left_to_next); |
| } |
| } |
| } |
| } |
| |
| while (n_left_from > 0 && n_left_to_next > 0) |
| { |
| vlib_buffer_t *p0; |
| ip6_header_t *ip0; |
| u32 pi0, lbi0; |
| ip_lookup_next_t next0; |
| load_balance_t *lb0; |
| ip6_address_t *dst_addr0; |
| u32 fib_index0, flow_hash_config0; |
| const dpo_id_t *dpo0; |
| |
| pi0 = from[0]; |
| to_next[0] = pi0; |
| |
| p0 = vlib_get_buffer (vm, pi0); |
| |
| ip0 = vlib_buffer_get_current (p0); |
| |
| dst_addr0 = &ip0->dst_address; |
| |
| fib_index0 = |
| vec_elt (im->fib_index_by_sw_if_index, |
| vnet_buffer (p0)->sw_if_index[VLIB_RX]); |
| fib_index0 = |
| (vnet_buffer (p0)->sw_if_index[VLIB_TX] == |
| (u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX]; |
| |
| lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0); |
| |
| lb0 = load_balance_get (lbi0); |
| flow_hash_config0 = lb0->lb_hash_config; |
| |
| vnet_buffer (p0)->ip.flow_hash = 0; |
| ASSERT (lb0->lb_n_buckets > 0); |
| ASSERT (is_pow2 (lb0->lb_n_buckets)); |
| |
| if (PREDICT_FALSE (lb0->lb_n_buckets > 1)) |
| { |
| flow_hash_config0 = lb0->lb_hash_config; |
| vnet_buffer (p0)->ip.flow_hash = |
| ip6_compute_flow_hash (ip0, flow_hash_config0); |
| dpo0 = |
| load_balance_get_fwd_bucket (lb0, |
| (vnet_buffer (p0)->ip.flow_hash & |
| (lb0->lb_n_buckets_minus_1))); |
| } |
| else |
| { |
| dpo0 = load_balance_get_bucket_i (lb0, 0); |
| } |
| |
| dpo0 = load_balance_get_bucket_i (lb0, |
| (vnet_buffer (p0)->ip.flow_hash & |
| lb0->lb_n_buckets_minus_1)); |
| next0 = dpo0->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; |
| } |
| vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; |
| |
| vlib_increment_combined_counter |
| (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0)); |
| |
| from += 1; |
| to_next += 1; |
| n_left_to_next -= 1; |
| n_left_from -= 1; |
| |
| if (PREDICT_FALSE (next0 != next)) |
| { |
| n_left_to_next += 1; |
| vlib_put_next_frame (vm, node, next, n_left_to_next); |
| next = next0; |
| vlib_get_next_frame (vm, node, next, to_next, n_left_to_next); |
| to_next[0] = pi0; |
| to_next += 1; |
| n_left_to_next -= 1; |
| } |
| } |
| |
| vlib_put_next_frame (vm, node, next, n_left_to_next); |
| } |
| |
| if (node->flags & VLIB_NODE_FLAG_TRACE) |
| ip6_forward_next_trace (vm, node, frame, VLIB_TX); |
| |
| return frame->n_vectors; |
| } |
| |
| 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, |
| }; |
| |
| if (a->address_length < 128) |
| { |
| fib_table_entry_update_one_path (fib_index, |
| &pfx, |
| FIB_SOURCE_INTERFACE, |
| (FIB_ENTRY_FLAG_CONNECTED | |
| FIB_ENTRY_FLAG_ATTACHED), |
| FIB_PROTOCOL_IP6, |
| /* No next-hop address */ |
| NULL, sw_if_index, |
| /* invalid FIB index */ |
| ~0, 1, |
| /* no label stack */ |
| NULL, FIB_ROUTE_PATH_FLAG_NONE); |
| } |
| |
| pfx.fp_len = 128; |
| if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index)) |
| { |
| u32 classify_table_index = |
| lm->classify_table_index_by_sw_if_index[sw_if_index]; |
| if (classify_table_index != (u32) ~ 0) |
| { |
| dpo_id_t dpo = DPO_INVALID; |
| |
| dpo_set (&dpo, |
| DPO_CLASSIFY, |
| DPO_PROTO_IP6, |
| classify_dpo_create (DPO_PROTO_IP6, classify_table_index)); |
| |
| fib_table_entry_special_dpo_add (fib_index, |
| &pfx, |
| FIB_SOURCE_CLASSIFY, |
| FIB_ENTRY_FLAG_NONE, &dpo); |
| dpo_reset (&dpo); |
| } |
| } |
| |
| fib_table_entry_update_one_path (fib_index, &pfx, |
| FIB_SOURCE_INTERFACE, |
| (FIB_ENTRY_FLAG_CONNECTED | |
| FIB_ENTRY_FLAG_LOCAL), |
| FIB_PROTOCOL_IP6, |
| &pfx.fp_addr, |
| sw_if_index, ~0, |
| 1, NULL, FIB_ROUTE_PATH_FLAG_NONE); |
| } |
| |
| static void |
| ip6_del_interface_routes (ip6_main_t * im, |
| u32 fib_index, |
| ip6_address_t * address, u32 address_length) |
| { |
| fib_prefix_t pfx = { |
| .fp_len = address_length, |
| .fp_proto = FIB_PROTOCOL_IP6, |
| .fp_addr.ip6 = *address, |
| }; |
| |
| if (pfx.fp_len < 128) |
| { |
| fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE); |
| |
| } |
| |
| pfx.fp_len = 128; |
| fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE); |
| } |
| |
| void |
| ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable) |
| { |
| ip6_main_t *im = &ip6_main; |
| |
| vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0); |
| |
| /* |
| * enable/disable only on the 1<->0 transition |
| */ |
| if (is_enable) |
| { |
| if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index]) |
| return; |
| } |
| else |
| { |
| /* The ref count is 0 when an address is removed from an interface that has |
| * no address - this is not a ciritical error */ |
| if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] || |
| 0 != --im->ip_enabled_by_sw_if_index[sw_if_index]) |
| return; |
| } |
| |
| vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index, |
| !is_enable, 0, 0); |
| |
| vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index, |
| !is_enable, 0, 0); |
| } |
| |
| /* get first interface address */ |
| ip6_address_t * |
| ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index) |
| { |
| ip_lookup_main_t *lm = &im->lookup_main; |
| ip_interface_address_t *ia = 0; |
| ip6_address_t *result = 0; |
| |
| /* *INDENT-OFF* */ |
| foreach_ip_interface_address (lm, ia, sw_if_index, |
| 1 /* honor unnumbered */, |
| ({ |
| ip6_address_t * a = ip_interface_address_get_address (lm, ia); |
| result = a; |
| break; |
| })); |
| /* *INDENT-ON* */ |
| return result; |
| } |
| |
| clib_error_t * |
| ip6_add_del_interface_address (vlib_main_t * vm, |
| u32 sw_if_index, |
| ip6_address_t * address, |
| u32 address_length, u32 is_del) |
| { |
| vnet_main_t *vnm = vnet_get_main (); |
| ip6_main_t *im = &ip6_main; |
| ip_lookup_main_t *lm = &im->lookup_main; |
| clib_error_t *error; |
| u32 if_address_index; |
| ip6_address_fib_t ip6_af, *addr_fib = 0; |
| |
| vec_validate (im->fib_index_by_sw_if_index, sw_if_index); |
| vec_validate (im->mfib_index_by_sw_if_index, sw_if_index); |
| |
| ip6_addr_fib_init (&ip6_af, address, |
| vec_elt (im->fib_index_by_sw_if_index, sw_if_index)); |
| vec_add1 (addr_fib, ip6_af); |
| |
| { |
| uword elts_before = pool_elts (lm->if_address_pool); |
| |
| error = ip_interface_address_add_del |
| (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index); |
| if (error) |
| goto done; |
| |
| /* Pool did not grow: add duplicate address. */ |
| if (elts_before == pool_elts (lm->if_address_pool)) |
| goto done; |
| } |
| |
| 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); |
| else |
| ip6_add_interface_routes (vnm, sw_if_index, |
| im, ip6_af.fib_index, |
| pool_elt_at_index (lm->if_address_pool, |
| if_address_index)); |
| |
| { |
| ip6_add_del_interface_address_callback_t *cb; |
| vec_foreach (cb, im->add_del_interface_address_callbacks) |
| cb->function (im, cb->function_opaque, sw_if_index, |
| address, address_length, if_address_index, is_del); |
| } |
| |
| done: |
| vec_free (addr_fib); |
| return error; |
| } |
| |
| clib_error_t * |
| ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags) |
| { |
| ip6_main_t *im = &ip6_main; |
| ip_interface_address_t *ia; |
| ip6_address_t *a; |
| u32 is_admin_up, fib_index; |
| |
| /* Fill in lookup tables with default table (0). */ |
| vec_validate (im->fib_index_by_sw_if_index, sw_if_index); |
| |
| vec_validate_init_empty (im-> |
| lookup_main.if_address_pool_index_by_sw_if_index, |
| sw_if_index, ~0); |
| |
| is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0; |
| |
| fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index); |
| |
| /* *INDENT-OFF* */ |
| foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index, |
| 0 /* honor unnumbered */, |
| ({ |
| a = ip_interface_address_get_address (&im->lookup_main, ia); |
| if (is_admin_up) |
| ip6_add_interface_routes (vnm, sw_if_index, |
| im, fib_index, |
| ia); |
| else |
| ip6_del_interface_routes (im, fib_index, |
| a, ia->address_length); |
| })); |
| /* *INDENT-ON* */ |
| |
| return 0; |
| } |
| |
| VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down); |
| |
| /* Built-in ip6 unicast rx feature path definition */ |
| /* *INDENT-OFF* */ |
| VNET_FEATURE_ARC_INIT (ip6_unicast, static) = |
| { |
| .arc_name = "ip6-unicast", |
| .start_nodes = VNET_FEATURES ("ip6-input"), |
| .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index, |
| }; |
| |
| VNET_FEATURE_INIT (ip6_flow_classify, static) = |
| { |
| .arc_name = "ip6-unicast", |
| .node_name = "ip6-flow-classify", |
| .runs_before = VNET_FEATURES ("ip6-inacl"), |
| }; |
| |
| VNET_FEATURE_INIT (ip6_inacl, static) = |
| { |
| .arc_name = "ip6-unicast", |
| .node_name = "ip6-inacl", |
| .runs_before = VNET_FEATURES ("ip6-policer-classify"), |
| }; |
| |
| VNET_FEATURE_INIT (ip6_policer_classify, static) = |
| { |
| .arc_name = "ip6-unicast", |
| .node_name = "ip6-policer-classify", |
| .runs_before = VNET_FEATURES ("ipsec-input-ip6"), |
| }; |
| |
| VNET_FEATURE_INIT (ip6_ipsec, static) = |
| { |
| .arc_name = "ip6-unicast", |
| .node_name = "ipsec-input-ip6", |
| .runs_before = VNET_FEATURES ("l2tp-decap"), |
| }; |
| |
| VNET_FEATURE_INIT (ip6_l2tp, static) = |
| { |
| .arc_name = "ip6-unicast", |
| .node_name = "l2tp-decap", |
| .runs_before = VNET_FEATURES ("vpath-input-ip6"), |
| }; |
| |
| VNET_FEATURE_INIT (ip6_vpath, static) = |
| { |
| .arc_name = "ip6-unicast", |
| .node_name = "vpath-input-ip6", |
| .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"), |
| }; |
| |
| VNET_FEATURE_INIT (ip6_vxlan_bypass, static) = |
| { |
| .arc_name = "ip6-unicast", |
| .node_name = "ip6-vxlan-bypass", |
| .runs_before = VNET_FEATURES ("ip6-lookup"), |
| }; |
| |
| VNET_FEATURE_INIT (ip6_drop, static) = |
| { |
| .arc_name = "ip6-unicast", |
| .node_name = "ip6-drop", |
| .runs_before = VNET_FEATURES ("ip6-lookup"), |
| }; |
| |
| VNET_FEATURE_INIT (ip6_lookup, static) = |
| { |
| .arc_name = "ip6-unicast", |
| .node_name = "ip6-lookup", |
| .runs_before = 0, /*last feature*/ |
| }; |
| |
| /* Built-in ip6 multicast rx feature path definition (none now) */ |
| VNET_FEATURE_ARC_INIT (ip6_multicast, static) = |
| { |
| .arc_name = "ip6-multicast", |
| .start_nodes = VNET_FEATURES ("ip6-input"), |
| .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index, |
| }; |
| |
| VNET_FEATURE_INIT (ip6_vpath_mc, static) = { |
| .arc_name = "ip6-multicast", |
| .node_name = "vpath-input-ip6", |
| .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"), |
| }; |
| |
| VNET_FEATURE_INIT (ip6_drop_mc, static) = { |
| .arc_name = "ip6-multicast", |
| .node_name = "ip6-drop", |
| .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"), |
| }; |
| |
| VNET_FEATURE_INIT (ip6_mc_lookup, static) = { |
| .arc_name = "ip6-multicast", |
| .node_name = "ip6-mfib-forward-lookup", |
| .runs_before = 0, /* last feature */ |
| }; |
| |
| /* Built-in ip4 tx feature path definition */ |
| VNET_FEATURE_ARC_INIT (ip6_output, static) = |
| { |
| .arc_name = "ip6-output", |
| .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain"), |
| .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index, |
| }; |
| |
| VNET_FEATURE_INIT (ip6_ipsec_output, static) = { |
| .arc_name = "ip6-output", |
| .node_name = "ipsec-output-ip6", |
| .runs_before = VNET_FEATURES ("interface-output"), |
| }; |
| |
| VNET_FEATURE_INIT (ip6_interface_output, static) = { |
| .arc_name = "ip6-output", |
| .node_name = "interface-output", |
| .runs_before = 0, /* not before any other features */ |
| }; |
| /* *INDENT-ON* */ |
| |
| clib_error_t * |
| ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add) |
| { |
| ip6_main_t *im = &ip6_main; |
| |
| vec_validate (im->fib_index_by_sw_if_index, sw_if_index); |
| vec_validate (im->mfib_index_by_sw_if_index, sw_if_index); |
| |
| if (!is_add) |
| { |
| /* Ensure that IPv6 is disabled */ |
| ip6_main_t *im6 = &ip6_main; |
| ip_lookup_main_t *lm6 = &im6->lookup_main; |
| ip_interface_address_t *ia = 0; |
| ip6_address_t *address; |
| vlib_main_t *vm = vlib_get_main (); |
| |
| ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0 /* is_add */ ); |
| /* *INDENT-OFF* */ |
| foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* honor unnumbered */, |
| ({ |
| address = ip_interface_address_get_address (lm6, ia); |
| ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1); |
| })); |
| /* *INDENT-ON* */ |
| ip6_mfib_interface_enable_disable (sw_if_index, 0); |
| } |
| |
| vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index, |
| is_add, 0, 0); |
| |
| vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index, |
| is_add, 0, 0); |
| |
| return /* no error */ 0; |
| } |
| |
| VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del); |
| |
| static uword |
| ip6_lookup (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| return ip6_lookup_inline (vm, node, frame); |
| } |
| |
| static u8 *format_ip6_lookup_trace (u8 * s, va_list * args); |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ip6_lookup_node) = |
| { |
| .function = ip6_lookup, |
| .name = "ip6-lookup", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip6_lookup_trace, |
| .n_next_nodes = IP6_LOOKUP_N_NEXT, |
| .next_nodes = IP6_LOOKUP_NEXT_NODES, |
| }; |
| /* *INDENT-ON* */ |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup); |
| |
| always_inline uword |
| ip6_load_balance (vlib_main_t * vm, |
| vlib_node_runtime_t * node, 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 thread_index = vlib_get_thread_index (); |
| ip6_main_t *im = &ip6_main; |
| |
| from = vlib_frame_vector_args (frame); |
| n_left_from = frame->n_vectors; |
| next = node->cached_next_index; |
| |
| if (node->flags & VLIB_NODE_FLAG_TRACE) |
| ip6_forward_next_trace (vm, node, frame, VLIB_TX); |
| |
| while (n_left_from > 0) |
| { |
| vlib_get_next_frame (vm, node, next, to_next, n_left_to_next); |
| |
| |
| while (n_left_from >= 4 && n_left_to_next >= 2) |
| { |
| 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 (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)); |
| } |
| else |
| { |
| dpo0 = load_balance_get_bucket_i (lb0, 0); |
| } |
| if (PREDICT_FALSE (lb1->lb_n_buckets > 1)) |
| { |
| 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)); |
| } |
| 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)); |
| |
| vlib_validate_buffer_enqueue_x2 (vm, node, next, |
| to_next, n_left_to_next, |
| pi0, pi1, next0, next1); |
| } |
| |
| while (n_left_from > 0 && n_left_to_next > 0) |
| { |
| 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; |
| |
| pi0 = from[0]; |
| to_next[0] = pi0; |
| from += 1; |
| to_next += 1; |
| n_left_to_next -= 1; |
| n_left_from -= 1; |
| |
| p0 = vlib_get_buffer (vm, pi0); |
| |
| ip0 = vlib_buffer_get_current (p0); |
| lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; |
| |
| lb0 = load_balance_get (lbi0); |
| |
| hc0 = 0; |
| if (PREDICT_FALSE (lb0->lb_n_buckets > 1)) |
| { |
| 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)); |
| } |
| 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; |
| } |
| |
| vlib_increment_combined_counter |
| (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0)); |
| |
| vlib_validate_buffer_enqueue_x1 (vm, node, next, |
| to_next, n_left_to_next, |
| pi0, next0); |
| } |
| |
| vlib_put_next_frame (vm, node, next, n_left_to_next); |
| } |
| |
| return frame->n_vectors; |
| } |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ip6_load_balance_node) = |
| { |
| .function = ip6_load_balance, |
| .name = "ip6-load-balance", |
| .vector_size = sizeof (u32), |
| .sibling_of = "ip6-lookup", |
| .format_trace = format_ip6_lookup_trace, |
| }; |
| /* *INDENT-ON* */ |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance); |
| |
| typedef struct |
| { |
| /* Adjacency taken. */ |
| u32 adj_index; |
| u32 flow_hash; |
| u32 fib_index; |
| |
| /* Packet data, possibly *after* rewrite. */ |
| u8 packet_data[128 - 1 * sizeof (u32)]; |
| } |
| ip6_forward_next_trace_t; |
| |
| u8 * |
| format_ip6_forward_next_trace (u8 * s, va_list * args) |
| { |
| CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); |
| CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); |
| ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *); |
| uword indent = format_get_indent (s); |
| |
| s = format (s, "%U%U", |
| format_white_space, indent, |
| format_ip6_header, t->packet_data, sizeof (t->packet_data)); |
| return s; |
| } |
| |
| static u8 * |
| format_ip6_lookup_trace (u8 * s, va_list * args) |
| { |
| CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); |
| CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); |
| ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *); |
| uword indent = format_get_indent (s); |
| |
| s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x", |
| t->fib_index, t->adj_index, t->flow_hash); |
| s = format (s, "\n%U%U", |
| format_white_space, indent, |
| format_ip6_header, t->packet_data, sizeof (t->packet_data)); |
| return s; |
| } |
| |
| |
| static u8 * |
| format_ip6_rewrite_trace (u8 * s, va_list * args) |
| { |
| CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); |
| CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); |
| ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *); |
| uword indent = format_get_indent (s); |
| |
| s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x", |
| t->fib_index, t->adj_index, format_ip_adjacency, |
| t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash); |
| s = format (s, "\n%U%U", |
| format_white_space, indent, |
| format_ip_adjacency_packet_data, |
| t->adj_index, t->packet_data, sizeof (t->packet_data)); |
| return s; |
| } |
| |
| /* Common trace function for all ip6-forward next nodes. */ |
| void |
| ip6_forward_next_trace (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index) |
| { |
| u32 *from, n_left; |
| ip6_main_t *im = &ip6_main; |
| |
| n_left = frame->n_vectors; |
| from = vlib_frame_vector_args (frame); |
| |
| while (n_left >= 4) |
| { |
| u32 bi0, bi1; |
| vlib_buffer_t *b0, *b1; |
| ip6_forward_next_trace_t *t0, *t1; |
| |
| /* Prefetch next iteration. */ |
| vlib_prefetch_buffer_with_index (vm, from[2], LOAD); |
| vlib_prefetch_buffer_with_index (vm, from[3], LOAD); |
| |
| bi0 = from[0]; |
| bi1 = from[1]; |
| |
| b0 = vlib_get_buffer (vm, bi0); |
| b1 = vlib_get_buffer (vm, bi1); |
| |
| if (b0->flags & VLIB_BUFFER_IS_TRACED) |
| { |
| t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0])); |
| t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index]; |
| t0->flow_hash = vnet_buffer (b0)->ip.flow_hash; |
| t0->fib_index = |
| (vnet_buffer (b0)->sw_if_index[VLIB_TX] != |
| (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] : |
| vec_elt (im->fib_index_by_sw_if_index, |
| vnet_buffer (b0)->sw_if_index[VLIB_RX]); |
| |
| clib_memcpy (t0->packet_data, |
| vlib_buffer_get_current (b0), |
| sizeof (t0->packet_data)); |
| } |
| if (b1->flags & VLIB_BUFFER_IS_TRACED) |
| { |
| t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0])); |
| t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index]; |
| t1->flow_hash = vnet_buffer (b1)->ip.flow_hash; |
| t1->fib_index = |
| (vnet_buffer (b1)->sw_if_index[VLIB_TX] != |
| (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] : |
| vec_elt (im->fib_index_by_sw_if_index, |
| vnet_buffer (b1)->sw_if_index[VLIB_RX]); |
| |
| clib_memcpy (t1->packet_data, |
| vlib_buffer_get_current (b1), |
| sizeof (t1->packet_data)); |
| } |
| from += 2; |
| n_left -= 2; |
| } |
| |
| while (n_left >= 1) |
| { |
| u32 bi0; |
| vlib_buffer_t *b0; |
| ip6_forward_next_trace_t *t0; |
| |
| bi0 = from[0]; |
| |
| b0 = vlib_get_buffer (vm, bi0); |
| |
| if (b0->flags & VLIB_BUFFER_IS_TRACED) |
| { |
| t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0])); |
| t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index]; |
| t0->flow_hash = vnet_buffer (b0)->ip.flow_hash; |
| t0->fib_index = |
| (vnet_buffer (b0)->sw_if_index[VLIB_TX] != |
| (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] : |
| vec_elt (im->fib_index_by_sw_if_index, |
| vnet_buffer (b0)->sw_if_index[VLIB_RX]); |
| |
| clib_memcpy (t0->packet_data, |
| vlib_buffer_get_current (b0), |
| sizeof (t0->packet_data)); |
| } |
| from += 1; |
| n_left -= 1; |
| } |
| } |
| |
| static uword |
| ip6_drop_or_punt (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame, ip6_error_t error_code) |
| { |
| u32 *buffers = vlib_frame_vector_args (frame); |
| uword n_packets = frame->n_vectors; |
| |
| vlib_error_drop_buffers (vm, node, buffers, |
| /* stride */ 1, |
| n_packets, |
| /* next */ 0, |
| ip6_input_node.index, error_code); |
| |
| if (node->flags & VLIB_NODE_FLAG_TRACE) |
| ip6_forward_next_trace (vm, node, frame, VLIB_TX); |
| |
| return n_packets; |
| } |
| |
| static uword |
| ip6_drop (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_DROP); |
| } |
| |
| static uword |
| ip6_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_PUNT); |
| } |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ip6_drop_node, static) = |
| { |
| .function = ip6_drop, |
| .name = "ip6-drop", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip6_forward_next_trace, |
| .n_next_nodes = 1, |
| .next_nodes = |
| { |
| [0] = "error-drop",}, |
| }; |
| /* *INDENT-ON* */ |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (ip6_drop_node, ip6_drop); |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ip6_punt_node, static) = |
| { |
| .function = ip6_punt, |
| .name = "ip6-punt", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip6_forward_next_trace, |
| .n_next_nodes = 1, |
| .next_nodes = |
| { |
| [0] = "error-punt",}, |
| }; |
| /* *INDENT-ON* */ |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (ip6_punt_node, ip6_punt); |
| |
| /* Compute TCP/UDP/ICMP6 checksum in software. */ |
| u16 |
| ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, |
| ip6_header_t * ip0, int *bogus_lengthp) |
| { |
| ip_csum_t sum0; |
| 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; |
| |
| ASSERT (bogus_lengthp); |
| *bogus_lengthp = 0; |
| |
| /* 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); |
| |
| for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++) |
| { |
| sum0 = ip_csum_with_carry (sum0, |
| clib_mem_unaligned (&ip0-> |
| src_address.as_uword[i], |
| uword)); |
| sum0 = |
| ip_csum_with_carry (sum0, |
| clib_mem_unaligned (&ip0->dst_address.as_uword[i], |
| uword)); |
| } |
| |
| /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) |
| * or UDP-Ping packets */ |
| if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS)) |
| { |
| u32 skip_bytes; |
| ip6_hop_by_hop_ext_t *ext_hdr = |
| (ip6_hop_by_hop_ext_t *) data_this_buffer; |
| |
| /* validate really icmp6 next */ |
| ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6) |
| || (ext_hdr->next_hdr == IP_PROTOCOL_UDP)); |
| |
| skip_bytes = 8 * (1 + ext_hdr->n_data_u64s); |
| data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes); |
| |
| payload_length_host_byte_order -= skip_bytes; |
| headers_size += skip_bytes; |
| } |
| |
| 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; |
| while (1) |
| { |
| sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer); |
| n_bytes_left -= n_this_buffer; |
| if (n_bytes_left == 0) |
| break; |
| |
| if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT)) |
| { |
| *bogus_lengthp = 1; |
| return 0xfefe; |
| } |
| p0 = vlib_get_buffer (vm, p0->next_buffer); |
| data_this_buffer = vlib_buffer_get_current (p0); |
| n_this_buffer = p0->current_length; |
| } |
| |
| sum16 = ~ip_csum_fold (sum0); |
| |
| return sum16; |
| } |
| |
| u32 |
| ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0) |
| { |
| ip6_header_t *ip0 = vlib_buffer_get_current (p0); |
| udp_header_t *udp0; |
| u16 sum16; |
| int bogus_length; |
| |
| /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */ |
| ASSERT (ip0->protocol == IP_PROTOCOL_TCP |
| || ip0->protocol == IP_PROTOCOL_ICMP6 |
| || ip0->protocol == IP_PROTOCOL_UDP |
| || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS); |
| |
| udp0 = (void *) (ip0 + 1); |
| if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0) |
| { |
| p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED |
| | IP_BUFFER_L4_CHECKSUM_CORRECT); |
| return p0->flags; |
| } |
| |
| sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length); |
| |
| p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED |
| | ((sum16 == 0) << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT)); |
| |
| return p0->flags; |
| } |
| |
| /** |
| * @brief returns number of links on which src is reachable. |
| */ |
| always_inline int |
| ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i) |
| { |
| const load_balance_t *lb0; |
| index_t lbi; |
| |
| lbi = ip6_fib_table_fwding_lookup_with_if_index (im, |
| vnet_buffer |
| (b)->sw_if_index[VLIB_RX], |
| &i->src_address); |
| |
| lb0 = load_balance_get (lbi); |
| |
| return (fib_urpf_check_size (lb0->lb_urpf)); |
| } |
| |
| static uword |
| ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| ip6_main_t *im = &ip6_main; |
| ip_lookup_main_t *lm = &im->lookup_main; |
| ip_local_next_t next_index; |
| u32 *from, *to_next, n_left_from, n_left_to_next; |
| vlib_node_runtime_t *error_node = |
| vlib_node_get_runtime (vm, ip6_input_node.index); |
| |
| from = vlib_frame_vector_args (frame); |
| n_left_from = frame->n_vectors; |
| next_index = node->cached_next_index; |
| |
| if (node->flags & VLIB_NODE_FLAG_TRACE) |
| ip6_forward_next_trace (vm, node, frame, VLIB_TX); |
| |
| while (n_left_from > 0) |
| { |
| vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); |
| |
| while (n_left_from >= 4 && n_left_to_next >= 2) |
| { |
| vlib_buffer_t *p0, *p1; |
| ip6_header_t *ip0, *ip1; |
| udp_header_t *udp0, *udp1; |
| u32 pi0, ip_len0, udp_len0, flags0, next0; |
| u32 pi1, ip_len1, udp_len1, flags1, next1; |
| i32 len_diff0, len_diff1; |
| u8 error0, type0, good_l4_checksum0; |
| u8 error1, type1, good_l4_checksum1; |
| u32 udp_offset0, udp_offset1; |
| |
| 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); |
| |
| vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data; |
| vnet_buffer (p1)->ip.start_of_ip_header = p1->current_data; |
| |
| type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol]; |
| type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol]; |
| |
| next0 = lm->local_next_by_ip_protocol[ip0->protocol]; |
| next1 = lm->local_next_by_ip_protocol[ip1->protocol]; |
| |
| flags0 = p0->flags; |
| flags1 = p1->flags; |
| |
| good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; |
| good_l4_checksum1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; |
| len_diff0 = 0; |
| len_diff1 = 0; |
| |
| if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0, |
| IP_PROTOCOL_UDP, |
| &udp_offset0))) |
| { |
| udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0); |
| /* Don't verify UDP checksum for packets with explicit zero checksum. */ |
| good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP |
| && udp0->checksum == 0; |
| /* Verify UDP length. */ |
| ip_len0 = clib_net_to_host_u16 (ip0->payload_length); |
| udp_len0 = clib_net_to_host_u16 (udp0->length); |
| len_diff0 = ip_len0 - udp_len0; |
| } |
| if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p1, ip1, |
| IP_PROTOCOL_UDP, |
| &udp_offset1))) |
| { |
| udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1); |
| /* Don't verify UDP checksum for packets with explicit zero checksum. */ |
| good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP |
| && udp1->checksum == 0; |
| /* Verify UDP length. */ |
| ip_len1 = clib_net_to_host_u16 (ip1->payload_length); |
| udp_len1 = clib_net_to_host_u16 (udp1->length); |
| len_diff1 = ip_len1 - udp_len1; |
| } |
| |
| good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN; |
| good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN; |
| |
| len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0; |
| len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0; |
| |
| if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN |
| && !good_l4_checksum0 |
| && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED))) |
| { |
| flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0); |
| good_l4_checksum0 = |
| (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; |
| } |
| if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN |
| && !good_l4_checksum1 |
| && !(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED))) |
| { |
| flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1); |
| good_l4_checksum1 = |
| (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; |
| } |
| |
| error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL; |
| |
| error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0; |
| error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1; |
| |
| ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP == |
| IP6_ERROR_UDP_CHECKSUM); |
| ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP == |
| IP6_ERROR_ICMP_CHECKSUM); |
| error0 = |
| (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0); |
| error1 = |
| (!good_l4_checksum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1); |
| |
| /* Drop packets from unroutable hosts. */ |
| /* If this is a neighbor solicitation (ICMP), skip source RPF check */ |
| if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL && |
| type0 != IP_BUILTIN_PROTOCOL_ICMP && |
| !ip6_address_is_link_local_unicast (&ip0->src_address)) |
| { |
| error0 = (!ip6_urpf_loose_check (im, p0, ip0) |
| ? IP6_ERROR_SRC_LOOKUP_MISS : error0); |
| } |
| if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL && |
| type1 != IP_BUILTIN_PROTOCOL_ICMP && |
| !ip6_address_is_link_local_unicast (&ip1->src_address)) |
| { |
| error1 = (!ip6_urpf_loose_check (im, p1, ip1) |
| ? IP6_ERROR_SRC_LOOKUP_MISS : error1); |
| } |
| |
| next0 = |
| error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0; |
| next1 = |
| error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1; |
| |
| p0->error = error_node->errors[error0]; |
| p1->error = error_node->errors[error1]; |
| |
| vlib_validate_buffer_enqueue_x2 (vm, node, next_index, |
| to_next, n_left_to_next, |
| pi0, pi1, next0, next1); |
| } |
| |
| while (n_left_from > 0 && n_left_to_next > 0) |
| { |
| vlib_buffer_t *p0; |
| ip6_header_t *ip0; |
| udp_header_t *udp0; |
| u32 pi0, ip_len0, udp_len0, flags0, next0; |
| i32 len_diff0; |
| u8 error0, type0, good_l4_checksum0; |
| u32 udp_offset0; |
| |
| pi0 = to_next[0] = from[0]; |
| from += 1; |
| n_left_from -= 1; |
| to_next += 1; |
| n_left_to_next -= 1; |
| |
| p0 = vlib_get_buffer (vm, pi0); |
| |
| ip0 = vlib_buffer_get_current (p0); |
| |
| vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data; |
| |
| type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol]; |
| next0 = lm->local_next_by_ip_protocol[ip0->protocol]; |
| |
| flags0 = p0->flags; |
| |
| good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; |
| len_diff0 = 0; |
| |
| if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0, |
| IP_PROTOCOL_UDP, |
| &udp_offset0))) |
| { |
| udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0); |
| /* Don't verify UDP checksum for packets with explicit zero checksum. */ |
| good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP |
| && udp0->checksum == 0; |
| /* Verify UDP length. */ |
| ip_len0 = clib_net_to_host_u16 (ip0->payload_length); |
| udp_len0 = clib_net_to_host_u16 (udp0->length); |
| len_diff0 = ip_len0 - udp_len0; |
| } |
| |
| good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN; |
| len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0; |
| |
| if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN |
| && !good_l4_checksum0 |
| && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED))) |
| { |
| flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0); |
| good_l4_checksum0 = |
| (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; |
| } |
| |
| error0 = IP6_ERROR_UNKNOWN_PROTOCOL; |
| |
| error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0; |
| |
| ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP == |
| IP6_ERROR_UDP_CHECKSUM); |
| ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP == |
| IP6_ERROR_ICMP_CHECKSUM); |
| error0 = |
| (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0); |
| |
| /* If this is a neighbor solicitation (ICMP), skip source RPF check */ |
| if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL && |
| type0 != IP_BUILTIN_PROTOCOL_ICMP && |
| !ip6_address_is_link_local_unicast (&ip0->src_address)) |
| { |
| error0 = (!ip6_urpf_loose_check (im, p0, ip0) |
| ? IP6_ERROR_SRC_LOOKUP_MISS : error0); |
| } |
| |
| next0 = |
| error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0; |
| |
| p0->error = error_node->errors[error0]; |
| |
| vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| to_next, n_left_to_next, |
| pi0, next0); |
| } |
| |
| vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| } |
| |
| return frame->n_vectors; |
| } |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ip6_local_node, static) = |
| { |
| .function = ip6_local, |
| .name = "ip6-local", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip6_forward_next_trace, |
| .n_next_nodes = IP_LOCAL_N_NEXT, |
| .next_nodes = |
| { |
| [IP_LOCAL_NEXT_DROP] = "error-drop", |
| [IP_LOCAL_NEXT_PUNT] = "error-punt", |
| [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup", |
| [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input", |
| }, |
| }; |
| /* *INDENT-ON* */ |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local); |
| |
| void |
| ip6_register_protocol (u32 protocol, u32 node_index) |
| { |
| vlib_main_t *vm = vlib_get_main (); |
| 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] = |
| vlib_node_add_next (vm, ip6_local_node.index, node_index); |
| } |
| |
| typedef enum |
| { |
| IP6_DISCOVER_NEIGHBOR_NEXT_DROP, |
| IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX, |
| IP6_DISCOVER_NEIGHBOR_N_NEXT, |
| } ip6_discover_neighbor_next_t; |
| |
| typedef enum |
| { |
| IP6_DISCOVER_NEIGHBOR_ERROR_DROP, |
| IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT, |
| IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS, |
| } ip6_discover_neighbor_error_t; |
| |
| static uword |
| ip6_discover_neighbor_inline (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame, int is_glean) |
| { |
| vnet_main_t *vnm = vnet_get_main (); |
| ip6_main_t *im = &ip6_main; |
| ip_lookup_main_t *lm = &im->lookup_main; |
| u32 *from, *to_next_drop; |
| uword n_left_from, n_left_to_next_drop; |
| static f64 time_last_seed_change = -1e100; |
| static u32 hash_seeds[3]; |
| static uword hash_bitmap[256 / BITS (uword)]; |
| f64 time_now; |
| int bogus_length; |
| |
| if (node->flags & VLIB_NODE_FLAG_TRACE) |
| ip6_forward_next_trace (vm, node, frame, VLIB_TX); |
| |
| time_now = vlib_time_now (vm); |
| if (time_now - time_last_seed_change > 1e-3) |
| { |
| uword i; |
| u32 *r = clib_random_buffer_get_data (&vm->random_buffer, |
| sizeof (hash_seeds)); |
| for (i = 0; i < ARRAY_LEN (hash_seeds); i++) |
| hash_seeds[i] = r[i]; |
| |
| /* Mark all hash keys as been not-seen before. */ |
| for (i = 0; i < ARRAY_LEN (hash_bitmap); i++) |
| hash_bitmap[i] = 0; |
| |
| time_last_seed_change = time_now; |
| } |
| |
| from = vlib_frame_vector_args (frame); |
| n_left_from = frame->n_vectors; |
| |
| while (n_left_from > 0) |
| { |
| vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP, |
| to_next_drop, n_left_to_next_drop); |
| |
| while (n_left_from > 0 && n_left_to_next_drop > 0) |
| { |
| vlib_buffer_t *p0; |
| ip6_header_t *ip0; |
| u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0; |
| uword bm0; |
| ip_adjacency_t *adj0; |
| vnet_hw_interface_t *hw_if0; |
| u32 next0; |
| |
| pi0 = from[0]; |
| |
| p0 = vlib_get_buffer (vm, pi0); |
| |
| adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; |
| |
| ip0 = vlib_buffer_get_current (p0); |
| |
| adj0 = adj_get (adj_index0); |
| |
| if (!is_glean) |
| { |
| ip0->dst_address.as_u64[0] = |
| adj0->sub_type.nbr.next_hop.ip6.as_u64[0]; |
| ip0->dst_address.as_u64[1] = |
| adj0->sub_type.nbr.next_hop.ip6.as_u64[1]; |
| } |
| |
| a0 = hash_seeds[0]; |
| b0 = hash_seeds[1]; |
| c0 = hash_seeds[2]; |
| |
| sw_if_index0 = adj0->rewrite_header.sw_if_index; |
| vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0; |
| |
| a0 ^= sw_if_index0; |
| b0 ^= ip0->dst_address.as_u32[0]; |
| c0 ^= ip0->dst_address.as_u32[1]; |
| |
| hash_v3_mix32 (a0, b0, c0); |
| |
| b0 ^= ip0->dst_address.as_u32[2]; |
| c0 ^= ip0->dst_address.as_u32[3]; |
| |
| hash_v3_finalize32 (a0, b0, c0); |
| |
| c0 &= BITS (hash_bitmap) - 1; |
| c0 = c0 / BITS (uword); |
| m0 = (uword) 1 << (c0 % BITS (uword)); |
| |
| bm0 = hash_bitmap[c0]; |
| drop0 = (bm0 & m0) != 0; |
| |
| /* Mark it as seen. */ |
| hash_bitmap[c0] = bm0 | m0; |
| |
| from += 1; |
| n_left_from -= 1; |
| to_next_drop[0] = pi0; |
| to_next_drop += 1; |
| n_left_to_next_drop -= 1; |
| |
| hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0); |
| |
| /* If the interface is link-down, drop the pkt */ |
| if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)) |
| drop0 = 1; |
| |
| p0->error = |
| node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP |
| : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT]; |
| if (drop0) |
| continue; |
| |
| /* |
| * the adj has been updated to a rewrite but the node the DPO that got |
| * us here hasn't - yet. no big deal. we'll drop while we wait. |
| */ |
| if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index) |
| continue; |
| |
| { |
| u32 bi0 = 0; |
| icmp6_neighbor_solicitation_header_t *h0; |
| vlib_buffer_t *b0; |
| |
| h0 = vlib_packet_template_get_packet |
| (vm, &im->discover_neighbor_packet_template, &bi0); |
| |
| /* |
| * Build ethernet header. |
| * Choose source address based on destination lookup |
| * adjacency. |
| */ |
| if (ip6_src_address_for_packet (lm, |
| sw_if_index0, |
| &h0->ip.src_address)) |
| { |
| /* There is no address on the interface */ |
| p0->error = |
| node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]; |
| vlib_buffer_free (vm, &bi0, 1); |
| continue; |
| } |
| |
| /* |
| * Destination address is a solicited node multicast address. |
| * We need to fill in |
| * the low 24 bits with low 24 bits of target's address. |
| */ |
| h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13]; |
| h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14]; |
| h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15]; |
| |
| h0->neighbor.target_address = ip0->dst_address; |
| |
| clib_memcpy (h0->link_layer_option.ethernet_address, |
| hw_if0->hw_address, vec_len (hw_if0->hw_address)); |
| |
| /* $$$$ appears we need this; why is the checksum non-zero? */ |
| h0->neighbor.icmp.checksum = 0; |
| h0->neighbor.icmp.checksum = |
| ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip, |
| &bogus_length); |
| |
| ASSERT (bogus_length == 0); |
| |
| vlib_buffer_copy_trace_flag (vm, p0, bi0); |
| b0 = vlib_get_buffer (vm, bi0); |
| vnet_buffer (b0)->sw_if_index[VLIB_TX] |
| = vnet_buffer (p0)->sw_if_index[VLIB_TX]; |
| |
| /* Add rewrite/encap string. */ |
| vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t)); |
| vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes); |
| |
| next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX; |
| |
| vlib_set_next_frame_buffer (vm, node, next0, bi0); |
| } |
| } |
| |
| vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP, |
| n_left_to_next_drop); |
| } |
| |
| return frame->n_vectors; |
| } |
| |
| static uword |
| ip6_discover_neighbor (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| return (ip6_discover_neighbor_inline (vm, node, frame, 0)); |
| } |
| |
| static uword |
| ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| return (ip6_discover_neighbor_inline (vm, node, frame, 1)); |
| } |
| |
| static char *ip6_discover_neighbor_error_strings[] = { |
| [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops", |
| [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent", |
| [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS] |
| = "no source address for ND solicitation", |
| }; |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ip6_discover_neighbor_node) = |
| { |
| .function = ip6_discover_neighbor, |
| .name = "ip6-discover-neighbor", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip6_forward_next_trace, |
| .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings), |
| .error_strings = ip6_discover_neighbor_error_strings, |
| .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT, |
| .next_nodes = |
| { |
| [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop", |
| [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output", |
| }, |
| }; |
| /* *INDENT-ON* */ |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ip6_glean_node) = |
| { |
| .function = ip6_glean, |
| .name = "ip6-glean", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip6_forward_next_trace, |
| .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings), |
| .error_strings = ip6_discover_neighbor_error_strings, |
| .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT, |
| .next_nodes = |
| { |
| [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop", |
| [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output", |
| }, |
| }; |
| /* *INDENT-ON* */ |
| |
| clib_error_t * |
| ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index) |
| { |
| vnet_main_t *vnm = vnet_get_main (); |
| ip6_main_t *im = &ip6_main; |
| icmp6_neighbor_solicitation_header_t *h; |
| ip6_address_t *src; |
| ip_interface_address_t *ia; |
| ip_adjacency_t *adj; |
| vnet_hw_interface_t *hi; |
| vnet_sw_interface_t *si; |
| vlib_buffer_t *b; |
| adj_index_t ai; |
| u32 bi = 0; |
| int bogus_length; |
| |
| si = vnet_get_sw_interface (vnm, sw_if_index); |
| |
| if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)) |
| { |
| return clib_error_return (0, "%U: interface %U down", |
| format_ip6_address, dst, |
| format_vnet_sw_if_index_name, vnm, |
| sw_if_index); |
| } |
| |
| src = |
| ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia); |
| if (!src) |
| { |
| vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE; |
| return clib_error_return |
| (0, "no matching interface address for destination %U (interface %U)", |
| format_ip6_address, dst, |
| format_vnet_sw_if_index_name, vnm, sw_if_index); |
| } |
| |
| h = |
| vlib_packet_template_get_packet (vm, |
| &im->discover_neighbor_packet_template, |
| &bi); |
| |
| hi = vnet_get_sup_hw_interface (vnm, sw_if_index); |
| |
| /* Destination address is a solicited node multicast address. We need to fill in |
| the low 24 bits with low 24 bits of target's address. */ |
| h->ip.dst_address.as_u8[13] = dst->as_u8[13]; |
| h->ip.dst_address.as_u8[14] = dst->as_u8[14]; |
| h->ip.dst_address.as_u8[15] = dst->as_u8[15]; |
| |
| h->ip.src_address = src[0]; |
| h->neighbor.target_address = dst[0]; |
| |
| clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address, |
| vec_len (hi->hw_address)); |
| |
| h->neighbor.icmp.checksum = |
| ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length); |
| ASSERT (bogus_length == 0); |
| |
| b = vlib_get_buffer (vm, bi); |
| vnet_buffer (b)->sw_if_index[VLIB_RX] = |
| vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index; |
| |
| /* Add encapsulation string for software interface (e.g. ethernet header). */ |
| ip46_address_t nh = { |
| .ip6 = *dst, |
| }; |
| |
| ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6, |
| VNET_LINK_IP6, &nh, sw_if_index); |
| adj = adj_get (ai); |
| |
| vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t)); |
| vlib_buffer_advance (b, -adj->rewrite_header.data_bytes); |
| |
| { |
| vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index); |
| u32 *to_next = vlib_frame_vector_args (f); |
| to_next[0] = bi; |
| f->n_vectors = 1; |
| vlib_put_frame_to_node (vm, hi->output_node_index, f); |
| } |
| |
| adj_unlock (ai); |
| return /* no error */ 0; |
| } |
| |
| typedef enum |
| { |
| IP6_REWRITE_NEXT_DROP, |
| IP6_REWRITE_NEXT_ICMP_ERROR, |
| } ip6_rewrite_next_t; |
| |
| always_inline uword |
| ip6_rewrite_inline (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame, |
| int do_counters, int is_midchain, int is_mcast) |
| { |
| ip_lookup_main_t *lm = &ip6_main.lookup_main; |
| u32 *from = vlib_frame_vector_args (frame); |
| u32 n_left_from, n_left_to_next, *to_next, next_index; |
| vlib_node_runtime_t *error_node = |
| vlib_node_get_runtime (vm, ip6_input_node.index); |
| |
| n_left_from = frame->n_vectors; |
| next_index = node->cached_next_index; |
| u32 thread_index = vlib_get_thread_index (); |
| |
| while (n_left_from > 0) |
| { |
| vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); |
| |
| while (n_left_from >= 4 && n_left_to_next >= 2) |
| { |
| ip_adjacency_t *adj0, *adj1; |
| vlib_buffer_t *p0, *p1; |
| ip6_header_t *ip0, *ip1; |
| u32 pi0, rw_len0, next0, error0, adj_index0; |
| u32 pi1, rw_len1, next1, error1, adj_index1; |
| u32 tx_sw_if_index0, tx_sw_if_index1; |
| |
| /* 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, LOAD); |
| vlib_prefetch_buffer_header (p3, LOAD); |
| |
| CLIB_PREFETCH (p2->pre_data, 32, STORE); |
| CLIB_PREFETCH (p3->pre_data, 32, 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); |
| |
| adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; |
| adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX]; |
| |
| ip0 = vlib_buffer_get_current (p0); |
| ip1 = vlib_buffer_get_current (p1); |
| |
| error0 = error1 = IP6_ERROR_NONE; |
| next0 = next1 = IP6_REWRITE_NEXT_DROP; |
| |
| if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED))) |
| { |
| i32 hop_limit0 = ip0->hop_limit; |
| |
| /* Input node should have reject packets with hop limit 0. */ |
| ASSERT (ip0->hop_limit > 0); |
| |
| hop_limit0 -= 1; |
| |
| ip0->hop_limit = hop_limit0; |
| |
| /* |
| * If the hop count drops below 1 when forwarding, generate |
| * an ICMP response. |
| */ |
| if (PREDICT_FALSE (hop_limit0 <= 0)) |
| { |
| error0 = IP6_ERROR_TIME_EXPIRED; |
| next0 = IP6_REWRITE_NEXT_ICMP_ERROR; |
| vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0; |
| icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded, |
| ICMP6_time_exceeded_ttl_exceeded_in_transit, |
| 0); |
| } |
| } |
| else |
| { |
| p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED; |
| } |
| if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_LOCALLY_ORIGINATED))) |
| { |
| i32 hop_limit1 = ip1->hop_limit; |
| |
| /* Input node should have reject packets with hop limit 0. */ |
| ASSERT (ip1->hop_limit > 0); |
| |
| hop_limit1 -= 1; |
| |
| ip1->hop_limit = hop_limit1; |
| |
| /* |
| * If the hop count drops below 1 when forwarding, generate |
| * an ICMP response. |
| */ |
| if (PREDICT_FALSE (hop_limit1 <= 0)) |
| { |
| error1 = IP6_ERROR_TIME_EXPIRED; |
| next1 = IP6_REWRITE_NEXT_ICMP_ERROR; |
| vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0; |
| icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded, |
| ICMP6_time_exceeded_ttl_exceeded_in_transit, |
| 0); |
| } |
| } |
| else |
| { |
| p1->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED; |
| } |
| adj0 = adj_get (adj_index0); |
| adj1 = adj_get (adj_index1); |
| |
| rw_len0 = adj0[0].rewrite_header.data_bytes; |
| rw_len1 = adj1[0].rewrite_header.data_bytes; |
| vnet_buffer (p0)->ip.save_rewrite_length = rw_len0; |
| vnet_buffer (p1)->ip.save_rewrite_length = rw_len1; |
| |
| if (do_counters) |
| { |
| vlib_increment_combined_counter |
| (&adjacency_counters, |
| thread_index, adj_index0, 1, |
| vlib_buffer_length_in_chain (vm, p0) + rw_len0); |
| vlib_increment_combined_counter |
| (&adjacency_counters, |
| thread_index, adj_index1, 1, |
| vlib_buffer_length_in_chain (vm, p1) + rw_len1); |
| } |
| |
| /* Check MTU of outgoing interface. */ |
| error0 = |
| (vlib_buffer_length_in_chain (vm, p0) > |
| adj0[0]. |
| rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED : |
| error0); |
| error1 = |
| (vlib_buffer_length_in_chain (vm, p1) > |
| adj1[0]. |
| rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED : |
| error1); |
| |
| /* Don't adjust the buffer for hop count issue; icmp-error node |
| * wants to see the IP headerr */ |
| if (PREDICT_TRUE (error0 == IP6_ERROR_NONE)) |
| { |
| p0->current_data -= rw_len0; |
| p0->current_length += rw_len0; |
| |
| tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index; |
| vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0; |
| next0 = adj0[0].rewrite_header.next_index; |
| |
| if (PREDICT_FALSE |
| (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES)) |
| vnet_feature_arc_start (lm->output_feature_arc_index, |
| tx_sw_if_index0, &next0, p0); |
| } |
| if (PREDICT_TRUE (error1 == IP6_ERROR_NONE)) |
| { |
| p1->current_data -= rw_len1; |
| p1->current_length += rw_len1; |
| |
| tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index; |
| vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1; |
| next1 = adj1[0].rewrite_header.next_index; |
| |
| if (PREDICT_FALSE |
| (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES)) |
| vnet_feature_arc_start (lm->output_feature_arc_index, |
| tx_sw_if_index1, &next1, p1); |
| } |
| |
| /* Guess we are only writing on simple Ethernet header. */ |
| vnet_rewrite_two_headers (adj0[0], adj1[0], |
| ip0, ip1, sizeof (ethernet_header_t)); |
| |
| if (is_midchain) |
| { |
| adj0->sub_type.midchain.fixup_func (vm, adj0, p0); |
| adj1->sub_type.midchain.fixup_func (vm, adj1, p1); |
| } |
| if (is_mcast) |
| { |
| /* |
| * copy bytes from the IP address into the MAC rewrite |
| */ |
| vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0); |
| vnet_fixup_one_header (adj1[0], &ip1->dst_address, ip1); |
| } |
| |
| vlib_validate_buffer_enqueue_x2 (vm, node, next_index, |
| to_next, n_left_to_next, |
| pi0, pi1, next0, next1); |
| } |
| |
| while (n_left_from > 0 && n_left_to_next > 0) |
| { |
| ip_adjacency_t *adj0; |
| vlib_buffer_t *p0; |
| ip6_header_t *ip0; |
| u32 pi0, rw_len0; |
| u32 adj_index0, next0, error0; |
| u32 tx_sw_if_index0; |
| |
| pi0 = to_next[0] = from[0]; |
| |
| p0 = vlib_get_buffer (vm, pi0); |
| |
| adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; |
| |
| adj0 = adj_get (adj_index0); |
| |
| ip0 = vlib_buffer_get_current (p0); |
| |
| error0 = IP6_ERROR_NONE; |
| next0 = IP6_REWRITE_NEXT_DROP; |
| |
| /* Check hop limit */ |
| if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED))) |
| { |
| i32 hop_limit0 = ip0->hop_limit; |
| |
| ASSERT (ip0->hop_limit > 0); |
| |
| hop_limit0 -= 1; |
| |
| ip0->hop_limit = hop_limit0; |
| |
| if (PREDICT_FALSE (hop_limit0 <= 0)) |
| { |
| /* |
| * If the hop count drops below 1 when forwarding, generate |
| * an ICMP response. |
| */ |
| error0 = IP6_ERROR_TIME_EXPIRED; |
| next0 = IP6_REWRITE_NEXT_ICMP_ERROR; |
| vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0; |
| icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded, |
| ICMP6_time_exceeded_ttl_exceeded_in_transit, |
| 0); |
| } |
| } |
| else |
| { |
| p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED; |
| } |
| |
| /* Guess we are only writing on simple Ethernet header. */ |
| vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t)); |
| |
| /* Update packet buffer attributes/set output interface. */ |
| rw_len0 = adj0[0].rewrite_header.data_bytes; |
| vnet_buffer (p0)->ip.save_rewrite_length = rw_len0; |
| |
| if (do_counters) |
| { |
| vlib_increment_combined_counter |
| (&adjacency_counters, |
| thread_index, adj_index0, 1, |
| vlib_buffer_length_in_chain (vm, p0) + rw_len0); |
| } |
| |
| /* Check MTU of outgoing interface. */ |
| error0 = |
| (vlib_buffer_length_in_chain (vm, p0) > |
| adj0[0]. |
| rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED : |
| error0); |
| |
| /* Don't adjust the buffer for hop count issue; icmp-error node |
| * wants to see the IP headerr */ |
| if (PREDICT_TRUE (error0 == IP6_ERROR_NONE)) |
| { |
| p0->current_data -= rw_len0; |
| p0->current_length += rw_len0; |
| |
| tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index; |
| |
| vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0; |
| next0 = adj0[0].rewrite_header.next_index; |
| |
| if (PREDICT_FALSE |
| (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES)) |
| vnet_feature_arc_start (lm->output_feature_arc_index, |
| tx_sw_if_index0, &next0, p0); |
| } |
| |
| if (is_midchain) |
| { |
| adj0->sub_type.midchain.fixup_func (vm, adj0, p0); |
| } |
| if (is_mcast) |
| { |
| vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0); |
| } |
| |
| p0->error = error_node->errors[error0]; |
| |
| from += 1; |
| n_left_from -= 1; |
| to_next += 1; |
| n_left_to_next -= 1; |
| |
| vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| to_next, n_left_to_next, |
| pi0, next0); |
| } |
| |
| vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| } |
| |
| /* Need to do trace after rewrites to pick up new packet data. */ |
| if (node->flags & VLIB_NODE_FLAG_TRACE) |
| ip6_forward_next_trace (vm, node, frame, VLIB_TX); |
| |
| return frame->n_vectors; |
| } |
| |
| static uword |
| ip6_rewrite (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| if (adj_are_counters_enabled ()) |
| return ip6_rewrite_inline (vm, node, frame, 1, 0, 0); |
| else |
| return ip6_rewrite_inline (vm, node, frame, 0, 0, 0); |
| } |
| |
| static uword |
| ip6_rewrite_mcast (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| if (adj_are_counters_enabled ()) |
| return ip6_rewrite_inline (vm, node, frame, 1, 0, 1); |
| else |
| return ip6_rewrite_inline (vm, node, frame, 0, 0, 1); |
| } |
| |
| static uword |
| ip6_midchain (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| if (adj_are_counters_enabled ()) |
| return ip6_rewrite_inline (vm, node, frame, 1, 1, 0); |
| else |
| return ip6_rewrite_inline (vm, node, frame, 0, 1, 0); |
| } |
| |
| static uword |
| ip6_mcast_midchain (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| if (adj_are_counters_enabled ()) |
| return ip6_rewrite_inline (vm, node, frame, 1, 1, 1); |
| else |
| return ip6_rewrite_inline (vm, node, frame, 0, 1, 1); |
| } |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ip6_midchain_node) = |
| { |
| .function = ip6_midchain, |
| .name = "ip6-midchain", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip6_forward_next_trace, |
| .sibling_of = "ip6-rewrite", |
| }; |
| /* *INDENT-ON* */ |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain); |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ip6_rewrite_node) = |
| { |
| .function = ip6_rewrite, |
| .name = "ip6-rewrite", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip6_rewrite_trace, |
| .n_next_nodes = 2, |
| .next_nodes = |
| { |
| [IP6_REWRITE_NEXT_DROP] = "error-drop", |
| [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error", |
| }, |
| }; |
| /* *INDENT-ON* */ |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite); |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) = |
| { |
| .function = ip6_rewrite_mcast, |
| .name = "ip6-rewrite-mcast", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip6_rewrite_trace, |
| .sibling_of = "ip6-rewrite", |
| }; |
| /* *INDENT-ON* */ |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_mcast_node, ip6_rewrite_mcast); |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ip6_mcast_midchain_node, static) = |
| { |
| .function = ip6_mcast_midchain, |
| .name = "ip6-mcast-midchain", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip6_rewrite_trace, |
| .sibling_of = "ip6-rewrite", |
| }; |
| /* *INDENT-ON* */ |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (ip6_mcast_midchain_node, ip6_mcast_midchain); |
| |
| /* |
| * Hop-by-Hop handling |
| */ |
| ip6_hop_by_hop_main_t ip6_hop_by_hop_main; |
| |
| #define foreach_ip6_hop_by_hop_error \ |
| _(PROCESSED, "pkts with ip6 hop-by-hop options") \ |
| _(FORMAT, "incorrectly formatted hop-by-hop options") \ |
| _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options") |
| |
| /* *INDENT-OFF* */ |
| typedef enum |
| { |
| #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym, |
| foreach_ip6_hop_by_hop_error |
| #undef _ |
| IP6_HOP_BY_HOP_N_ERROR, |
| } ip6_hop_by_hop_error_t; |
| /* *INDENT-ON* */ |
| |
| /* |
| * Primary h-b-h handler trace support |
| * We work pretty hard on the problem for obvious reasons |
| */ |
| typedef struct |
| { |
| u32 next_index; |
| u32 trace_len; |
| u8 option_data[256]; |
| } ip6_hop_by_hop_trace_t; |
| |
| vlib_node_registration_t ip6_hop_by_hop_node; |
| |
| static char *ip6_hop_by_hop_error_strings[] = { |
| #define _(sym,string) string, |
| foreach_ip6_hop_by_hop_error |
| #undef _ |
| }; |
| |
| u8 * |
| format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args) |
| { |
| ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *); |
| int total_len = va_arg (*args, int); |
| ip6_hop_by_hop_option_t *opt0, *limit0; |
| ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main; |
| u8 type0; |
| |
| s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d", |
| hbh0->protocol, (hbh0->length + 1) << 3, total_len); |
| |
| opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1); |
| limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len); |
| |
| while (opt0 < limit0) |
| { |
| type0 = opt0->type; |
| switch (type0) |
| { |
| case 0: /* Pad, just stop */ |
| opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1); |
| break; |
| |
| default: |
| if (hm->trace[type0]) |
| { |
| s = (*hm->trace[type0]) (s, opt0); |
| } |
| else |
| { |
| s = |
| format (s, "\n unrecognized option %d length %d", type0, |
| opt0->length); |
| } |
| opt0 = |
| (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length + |
| sizeof (ip6_hop_by_hop_option_t)); |
| break; |
| } |
| } |
| return s; |
| } |
| |
| static u8 * |
| format_ip6_hop_by_hop_trace (u8 * s, va_list * args) |
| { |
| CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); |
| CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); |
| ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *); |
| ip6_hop_by_hop_header_t *hbh0; |
| ip6_hop_by_hop_option_t *opt0, *limit0; |
| ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main; |
| |
| u8 type0; |
| |
| hbh0 = (ip6_hop_by_hop_header_t *) t->option_data; |
| |
| s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d", |
| t->next_index, (hbh0->length + 1) << 3, t->trace_len); |
| |
| opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1); |
| limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len; |
| |
| while (opt0 < limit0) |
| { |
| type0 = opt0->type; |
| switch (type0) |
| { |
| case 0: /* Pad, just stop */ |
| opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1; |
| break; |
| |
| default: |
| if (hm->trace[type0]) |
| { |
| s = (*hm->trace[type0]) (s, opt0); |
| } |
| else |
| { |
| s = |
| format (s, "\n unrecognized option %d length %d", type0, |
| opt0->length); |
| } |
| opt0 = |
| (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length + |
| sizeof (ip6_hop_by_hop_option_t)); |
| break; |
| } |
| } |
| return s; |
| } |
| |
| always_inline u8 |
| ip6_scan_hbh_options (vlib_buffer_t * b0, |
| ip6_header_t * ip0, |
| ip6_hop_by_hop_header_t * hbh0, |
| ip6_hop_by_hop_option_t * opt0, |
| ip6_hop_by_hop_option_t * limit0, u32 * next0) |
| { |
| ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main; |
| u8 type0; |
| u8 error0 = 0; |
| |
| while (opt0 < limit0) |
| { |
| type0 = opt0->type; |
| switch (type0) |
| { |
| case 0: /* Pad1 */ |
| opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1; |
| continue; |
| case 1: /* PadN */ |
| break; |
| default: |
| if (hm->options[type0]) |
| { |
| if ((*hm->options[type0]) (b0, ip0, opt0) < 0) |
| { |
| error0 = IP6_HOP_BY_HOP_ERROR_FORMAT; |
| return (error0); |
| } |
| } |
| else |
| { |
| /* Unrecognized mandatory option, check the two high order bits */ |
| switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS) |
| { |
| case HBH_OPTION_TYPE_SKIP_UNKNOWN: |
| break; |
| case HBH_OPTION_TYPE_DISCARD_UNKNOWN: |
| error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION; |
| *next0 = IP_LOOKUP_NEXT_DROP; |
| break; |
| case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP: |
| error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION; |
| *next0 = IP_LOOKUP_NEXT_ICMP_ERROR; |
| icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem, |
| ICMP6_parameter_problem_unrecognized_option, |
| (u8 *) opt0 - (u8 *) ip0); |
| break; |
| case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST: |
| error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION; |
| if (!ip6_address_is_multicast (&ip0->dst_address)) |
| { |
| *next0 = IP_LOOKUP_NEXT_ICMP_ERROR; |
| icmp6_error_set_vnet_buffer (b0, |
| ICMP6_parameter_problem, |
| ICMP6_parameter_problem_unrecognized_option, |
| (u8 *) opt0 - (u8 *) ip0); |
| } |
| else |
| { |
| *next0 = IP_LOOKUP_NEXT_DROP; |
| } |
| break; |
| } |
| return (error0); |
| } |
| } |
| opt0 = |
| (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length + |
| sizeof (ip6_hop_by_hop_option_t)); |
| } |
| return (error0); |
| } |
| |
| /* |
| * Process the Hop-by-Hop Options header |
| */ |
| static uword |
| ip6_hop_by_hop (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| vlib_node_runtime_t *error_node = |
| vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index); |
| ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main; |
| u32 n_left_from, *from, *to_next; |
| ip_lookup_next_t next_index; |
| |
| from = vlib_frame_vector_args (frame); |
| n_left_from = frame->n_vectors; |
| next_index = node->cached_next_index; |
| |
| while (n_left_from > 0) |
| { |
| u32 n_left_to_next; |
| |
| vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); |
| |
| while (n_left_from >= 4 && n_left_to_next >= 2) |
| { |
| u32 bi0, bi1; |
| vlib_buffer_t *b0, *b1; |
| u32 next0, next1; |
| ip6_header_t *ip0, *ip1; |
| ip6_hop_by_hop_header_t *hbh0, *hbh1; |
| ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1; |
| u8 error0 = 0, error1 = 0; |
| |
| /* 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, LOAD); |
| vlib_prefetch_buffer_header (p3, LOAD); |
| |
| CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); |
| CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); |
| } |
| |
| /* Speculatively enqueue b0, b1 to the current next frame */ |
| to_next[0] = bi0 = from[0]; |
| to_next[1] = bi1 = from[1]; |
| from += 2; |
| to_next += 2; |
| n_left_from -= 2; |
| n_left_to_next -= 2; |
| |
| b0 = vlib_get_buffer (vm, bi0); |
| b1 = vlib_get_buffer (vm, bi1); |
| |
| /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */ |
| u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX]; |
| ip_adjacency_t *adj0 = adj_get (adj_index0); |
| u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX]; |
| ip_adjacency_t *adj1 = adj_get (adj_index1); |
| |
| /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */ |
| next0 = adj0->lookup_next_index; |
| next1 = adj1->lookup_next_index; |
| |
| ip0 = vlib_buffer_get_current (b0); |
| ip1 = vlib_buffer_get_current (b1); |
| hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1); |
| hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1); |
| opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1); |
| opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1); |
| limit0 = |
| (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + |
| ((hbh0->length + 1) << 3)); |
| limit1 = |
| (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 + |
| ((hbh1->length + 1) << 3)); |
| |
| /* |
| * Basic validity checks |
| */ |
| if ((hbh0->length + 1) << 3 > |
| clib_net_to_host_u16 (ip0->payload_length)) |
| { |
| error0 = IP6_HOP_BY_HOP_ERROR_FORMAT; |
| next0 = IP_LOOKUP_NEXT_DROP; |
| goto outdual; |
| } |
| /* Scan the set of h-b-h options, process ones that we understand */ |
| error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0); |
| |
| if ((hbh1->length + 1) << 3 > |
| clib_net_to_host_u16 (ip1->payload_length)) |
| { |
| error1 = IP6_HOP_BY_HOP_ERROR_FORMAT; |
| next1 = IP_LOOKUP_NEXT_DROP; |
| goto outdual; |
| } |
| /* Scan the set of h-b-h options, process ones that we understand */ |
| error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1); |
| |
| outdual: |
| /* Has the classifier flagged this buffer for special treatment? */ |
| if (PREDICT_FALSE |
| ((error0 == 0) |
| && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP))) |
| next0 = hm->next_override; |
| |
| /* Has the classifier flagged this buffer for special treatment? */ |
| if (PREDICT_FALSE |
| ((error1 == 0) |
| && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP))) |
| next1 = hm->next_override; |
| |
| if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) |
| { |
| if (b0->flags & VLIB_BUFFER_IS_TRACED) |
| { |
| ip6_hop_by_hop_trace_t *t = |
| vlib_add_trace (vm, node, b0, sizeof (*t)); |
| u32 trace_len = (hbh0->length + 1) << 3; |
| t->next_index = next0; |
| /* Capture the h-b-h option verbatim */ |
| trace_len = |
| trace_len < |
| ARRAY_LEN (t->option_data) ? trace_len : |
| ARRAY_LEN (t->option_data); |
| t->trace_len = trace_len; |
| clib_memcpy (t->option_data, hbh0, trace_len); |
| } |
| if (b1->flags & VLIB_BUFFER_IS_TRACED) |
| { |
| ip6_hop_by_hop_trace_t *t = |
| vlib_add_trace (vm, node, b1, sizeof (*t)); |
| u32 trace_len = (hbh1->length + 1) << 3; |
| t->next_index = next1; |
| /* Capture the h-b-h option verbatim */ |
| trace_len = |
| trace_len < |
| ARRAY_LEN (t->option_data) ? trace_len : |
| ARRAY_LEN (t->option_data); |
| t->trace_len = trace_len; |
| clib_memcpy (t->option_data, hbh1, trace_len); |
| } |
| |
| } |
| |
| b0->error = error_node->errors[error0]; |
| b1->error = error_node->errors[error1]; |
| |
| /* verify speculative enqueue, maybe switch current next frame */ |
| vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, |
| n_left_to_next, bi0, bi1, next0, |
| next1); |
| } |
| |
| while (n_left_from > 0 && n_left_to_next > 0) |
| { |
| u32 bi0; |
| vlib_buffer_t *b0; |
| u32 next0; |
| ip6_header_t *ip0; |
| ip6_hop_by_hop_header_t *hbh0; |
| ip6_hop_by_hop_option_t *opt0, *limit0; |
| u8 error0 = 0; |
| |
| /* Speculatively enqueue b0 to the current next frame */ |
| bi0 = from[0]; |
| to_next[0] = bi0; |
| from += 1; |
| to_next += 1; |
| n_left_from -= 1; |
| n_left_to_next -= 1; |
| |
| b0 = vlib_get_buffer (vm, bi0); |
| /* |
| * Default use the next_index from the adjacency. |
| * A HBH option rarely redirects to a different node |
| */ |
| u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX]; |
| ip_adjacency_t *adj0 = adj_get (adj_index0); |
| next0 = adj0->lookup_next_index; |
| |
| ip0 = vlib_buffer_get_current (b0); |
| hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1); |
| opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1); |
| limit0 = |
| (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + |
| ((hbh0->length + 1) << 3)); |
| |
| /* |
| * Basic validity checks |
| */ |
| if ((hbh0->length + 1) << 3 > |
| clib_net_to_host_u16 (ip0->payload_length)) |
| { |
| error0 = IP6_HOP_BY_HOP_ERROR_FORMAT; |
| next0 = IP_LOOKUP_NEXT_DROP; |
| goto out0; |
| } |
| |
| /* Scan the set of h-b-h options, process ones that we understand */ |
| error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0); |
| |
| out0: |
| /* Has the classifier flagged this buffer for special treatment? */ |
| if (PREDICT_FALSE |
| ((error0 == 0) |
| && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP))) |
| next0 = hm->next_override; |
| |
| if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) |
| { |
| ip6_hop_by_hop_trace_t *t = |
| vlib_add_trace (vm, node, b0, sizeof (*t)); |
| u32 trace_len = (hbh0->length + 1) << 3; |
| t->next_index = next0; |
| /* Capture the h-b-h option verbatim */ |
| trace_len = |
| trace_len < |
| ARRAY_LEN (t->option_data) ? trace_len : |
| ARRAY_LEN (t->option_data); |
| t->trace_len = trace_len; |
| clib_memcpy (t->option_data, hbh0, trace_len); |
| } |
| |
| b0->error = error_node->errors[error0]; |
| |
| /* verify speculative enqueue, maybe switch current next frame */ |
| vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, |
| n_left_to_next, bi0, next0); |
| } |
| vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| } |
| return frame->n_vectors; |
| } |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ip6_hop_by_hop_node) = |
| { |
| .function = ip6_hop_by_hop, |
| .name = "ip6-hop-by-hop", |
| .sibling_of = "ip6-lookup", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip6_hop_by_hop_trace, |
| .type = VLIB_NODE_TYPE_INTERNAL, |
| .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings), |
| .error_strings = ip6_hop_by_hop_error_strings, |
| .n_next_nodes = 0, |
| }; |
| /* *INDENT-ON* */ |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop); |
| |
| static clib_error_t * |
| ip6_hop_by_hop_init (vlib_main_t * vm) |
| { |
| ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main; |
| memset (hm->options, 0, sizeof (hm->options)); |
| memset (hm->trace, 0, sizeof (hm->trace)); |
| hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP; |
| return (0); |
| } |
| |
| VLIB_INIT_FUNCTION (ip6_hop_by_hop_init); |
| |
| void |
| ip6_hbh_set_next_override (uword next) |
| { |
| ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main; |
| |
| hm->next_override = next; |
| } |
| |
| int |
| ip6_hbh_register_option (u8 option, |
| int options (vlib_buffer_t * b, ip6_header_t * ip, |
| ip6_hop_by_hop_option_t * opt), |
| u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt)) |
| { |
| ip6_main_t *im = &ip6_main; |
| ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main; |
| |
| ASSERT (option < ARRAY_LEN (hm->options)); |
| |
| /* Already registered */ |
| if (hm->options[option]) |
| return (-1); |
| |
| hm->options[option] = options; |
| hm->trace[option] = trace; |
| |
| /* Set global variable */ |
| im->hbh_enabled = 1; |
| |
| return (0); |
| } |
| |
| int |
| ip6_hbh_unregister_option (u8 option) |
| { |
| ip6_main_t *im = &ip6_main; |
| ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main; |
| |
| ASSERT (option < ARRAY_LEN (hm->options)); |
| |
| /* Not registered */ |
| if (!hm->options[option]) |
| return (-1); |
| |
| hm->options[option] = NULL; |
| hm->trace[option] = NULL; |
| |
| /* Disable global knob if this was the last option configured */ |
| int i; |
| bool found = false; |
| for (i = 0; i < 256; i++) |
| { |
| if (hm->options[option]) |
| { |
| found = true; |
| break; |
| } |
| } |
| if (!found) |
| im->hbh_enabled = 0; |
| |
| return (0); |
| } |
| |
| /* Global IP6 main. */ |
| ip6_main_t ip6_main; |
| |
| static clib_error_t * |
| ip6_lookup_init (vlib_main_t * vm) |
| { |
| ip6_main_t *im = &ip6_main; |
| clib_error_t *error; |
| uword i; |
| |
| if ((error = vlib_call_init_function (vm, vnet_feature_init))) |
| return error; |
| |
| for (i = 0; i < ARRAY_LEN (im->fib_masks); i++) |
| { |
| u32 j, i0, i1; |
| |
| i0 = i / 32; |
| i1 = i % 32; |
| |
| for (j = 0; j < i0; j++) |
| im->fib_masks[i].as_u32[j] = ~0; |
| |
| if (i1) |
| im->fib_masks[i].as_u32[i0] = |
| clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1)); |
| } |
| |
| ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1); |
| |
| if (im->lookup_table_nbuckets == 0) |
| im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS; |
| |
| im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets); |
| |
| if (im->lookup_table_size == 0) |
| im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE; |
| |
| BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash), |
| "ip6 FIB fwding table", |
| im->lookup_table_nbuckets, im->lookup_table_size); |
| BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash, |
| "ip6 FIB non-fwding table", |
| im->lookup_table_nbuckets, im->lookup_table_size); |
| |
| /* Create FIB with index 0 and table id of 0. */ |
| fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0); |
| mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0); |
| |
| { |
| pg_node_t *pn; |
| pn = pg_get_node (ip6_lookup_node.index); |
| pn->unformat_edit = unformat_pg_ip6_header; |
| } |
| |
| /* Unless explicitly configured, don't process HBH options */ |
| im->hbh_enabled = 0; |
| |
| { |
| icmp6_neighbor_solicitation_header_t p; |
| |
| memset (&p, 0, sizeof (p)); |
| |
| p.ip.ip_version_traffic_class_and_flow_label = |
| clib_host_to_net_u32 (0x6 << 28); |
| p.ip.payload_length = |
| clib_host_to_net_u16 (sizeof (p) - |
| STRUCT_OFFSET_OF |
| (icmp6_neighbor_solicitation_header_t, neighbor)); |
| p.ip.protocol = IP_PROTOCOL_ICMP6; |
| p.ip.hop_limit = 255; |
| ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0); |
| |
| p.neighbor.icmp.type = ICMP6_neighbor_solicitation; |
| |
| p.link_layer_option.header.type = |
| ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address; |
| p.link_layer_option.header.n_data_u64s = |
| sizeof (p.link_layer_option) / sizeof (u64); |
| |
| vlib_packet_template_init (vm, |
| &im->discover_neighbor_packet_template, |
| &p, sizeof (p), |
| /* alloc chunk size */ 8, |
| "ip6 neighbor discovery"); |
| } |
| |
| return error; |
| } |
| |
| VLIB_INIT_FUNCTION (ip6_lookup_init); |
| |
| static clib_error_t * |
| add_del_ip6_interface_table (vlib_main_t * vm, |
| unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| vnet_main_t *vnm = vnet_get_main (); |
| ip_interface_address_t *ia; |
| clib_error_t *error = 0; |
| u32 sw_if_index, table_id; |
| |
| sw_if_index = ~0; |
| |
| if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) |
| { |
| error = clib_error_return (0, "unknown interface `%U'", |
| format_unformat_error, input); |
| goto done; |
| } |
| |
| if (unformat (input, "%d", &table_id)) |
| ; |
| else |
| { |
| error = clib_error_return (0, "expected table id `%U'", |
| format_unformat_error, input); |
| goto done; |
| } |
| |
| /* |
| * If the interface already has in IP address, then a change int |
| * VRF is not allowed. The IP address applied must first be removed. |
| * We do not do that automatically here, since VPP has no knowledge |
| * of whether thoses subnets are valid in the destination VRF. |
| */ |
| /* *INDENT-OFF* */ |
| foreach_ip_interface_address (&ip6_main.lookup_main, |
| ia, sw_if_index, |
| 1 /* honor unnumbered */, |
| ({ |
| ip4_address_t * a; |
| |
| a = ip_interface_address_get_address (&ip6_main.lookup_main, ia); |
| error = clib_error_return (0, "interface %U has address %U", |
| format_vnet_sw_if_index_name, vnm, |
| sw_if_index, |
| format_ip6_address, a); |
| goto done; |
| })); |
| /* *INDENT-ON* */ |
| |
| { |
| u32 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, |
| table_id); |
| |
| vec_validate (ip6_main.fib_index_by_sw_if_index, sw_if_index); |
| ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index; |
| |
| fib_index = mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, |
| table_id); |
| |
| vec_validate (ip6_main.mfib_index_by_sw_if_index, sw_if_index); |
| ip6_main.mfib_index_by_sw_if_index[sw_if_index] = fib_index; |
| } |
| |
| |
| done: |
| return error; |
| } |
| |
| /*? |
| * Place the indicated interface into the supplied IPv6 FIB table (also known |
| * as a VRF). If the FIB table does not exist, this command creates it. To |
| * display the current IPv6 FIB table, use the command '<em>show ip6 fib</em>'. |
| * FIB table will only be displayed if a route has been added to the table, or |
| * an IP Address is assigned to an interface in the table (which adds a route |
| * automatically). |
| * |
| * @note IP addresses added after setting the interface IP table are added to |
| * the indicated FIB table. If an IP address is added prior to changing the |
| * table then this is an error. The control plane must remove these addresses |
| * first and then change the table. VPP will not automatically move the |
| * addresses from the old to the new table as it does not know the validity |
| * of such a change. |
| * |
| * @cliexpar |
| * Example of how to add an interface to an IPv6 FIB table (where 2 is the table-id): |
| * @cliexcmd{set interface ip6 table GigabitEthernet2/0/0 2} |
| ?*/ |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (set_interface_ip6_table_command, static) = |
| { |
| .path = "set interface ip6 table", |
| .function = add_del_ip6_interface_table, |
| .short_help = "set interface ip6 table <interface> <table-id>" |
| }; |
| /* *INDENT-ON* */ |
| |
| void |
| ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip, |
| u8 * mac) |
| { |
| ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL); |
| /* Invert the "u" bit */ |
| ip->as_u8[8] = mac[0] ^ (1 << 1); |
| ip->as_u8[9] = mac[1]; |
| ip->as_u8[10] = mac[2]; |
| ip->as_u8[11] = 0xFF; |
| ip->as_u8[12] = 0xFE; |
| ip->as_u8[13] = mac[3]; |
| ip->as_u8[14] = mac[4]; |
| ip->as_u8[15] = mac[5]; |
| } |
| |
| void |
| ip6_ethernet_mac_address_from_link_local_address (u8 * mac, |
| ip6_address_t * ip) |
| { |
| /* Invert the previously inverted "u" bit */ |
| mac[0] = ip->as_u8[8] ^ (1 << 1); |
| mac[1] = ip->as_u8[9]; |
| mac[2] = ip->as_u8[10]; |
| mac[3] = ip->as_u8[13]; |
| mac[4] = ip->as_u8[14]; |
| mac[5] = ip->as_u8[15]; |
| } |
| |
| static clib_error_t * |
| test_ip6_link_command_fn (vlib_main_t * vm, |
| unformat_input_t * input, vlib_cli_command_t * cmd) |
| { |
| u8 mac[6]; |
| ip6_address_t _a, *a = &_a; |
| |
| if (unformat (input, "%U", unformat_ethernet_address, mac)) |
| { |
| ip6_link_local_address_from_ethernet_mac_address (a, mac); |
| vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a); |
| ip6_ethernet_mac_address_from_link_local_address (mac, a); |
| vlib_cli_output (vm, "Original MAC address: %U", |
| format_ethernet_address, mac); |
| } |
| |
| return 0; |
| } |
| |
| /*? |
| * This command converts the given MAC Address into an IPv6 link-local |
| * address. |
| * |
| * @cliexpar |
| * Example of how to create an IPv6 link-local address: |
| * @cliexstart{test ip6 link 16:d9:e0:91:79:86} |
| * Link local address: fe80::14d9:e0ff:fe91:7986 |
| * Original MAC address: 16:d9:e0:91:79:86 |
| * @cliexend |
| ?*/ |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (test_link_command, static) = |
| { |
| .path = "test ip6 link", |
| .function = test_ip6_link_command_fn, |
| .short_help = "test ip6 link <mac-address>", |
| }; |
| /* *INDENT-ON* */ |
| |
| int |
| vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config) |
| { |
| u32 fib_index; |
| |
| fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id); |
| |
| if (~0 == fib_index) |
| return VNET_API_ERROR_NO_SUCH_FIB; |
| |
| fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6, |
| flow_hash_config); |
| |
| return 0; |
| } |
| |
| static clib_error_t * |
| set_ip6_flow_hash_command_fn (vlib_main_t * vm, |
| unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| int matched = 0; |
| u32 table_id = 0; |
| u32 flow_hash_config = 0; |
| int rv; |
| |
| while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
| { |
| if (unformat (input, "table %d", &table_id)) |
| matched = 1; |
| #define _(a,v) \ |
| else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;} |
| foreach_flow_hash_bit |
| #undef _ |
| else |
| break; |
| } |
| |
| if (matched == 0) |
| return clib_error_return (0, "unknown input `%U'", |
| format_unformat_error, input); |
| |
| rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config); |
| switch (rv) |
| { |
| case 0: |
| break; |
| |
| case -1: |
| return clib_error_return (0, "no such FIB table %d", table_id); |
| |
| default: |
| clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| /*? |
| * Configure the set of IPv6 fields used by the flow hash. |
| * |
| * @cliexpar |
| * @parblock |
| * Example of how to set the flow hash on a given table: |
| * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto} |
| * |
| * Example of display the configured flow hash: |
| * @cliexstart{show ip6 fib} |
| * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto |
| * @::/0 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]] |
| * [0] [@0]: dpo-drop ip6 |
| * fe80::/10 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]] |
| * [0] [@2]: dpo-receive |
| * ff02::1/128 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]] |
| * [0] [@2]: dpo-receive |
| * ff02::2/128 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]] |
| * [0] [@2]: dpo-receive |
| * ff02::16/128 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]] |
| * [0] [@2]: dpo-receive |
| * ff02::1:ff00:0/104 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]] |
| * [0] [@2]: dpo-receive |
| * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto |
| * @::/0 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]] |
| * [0] [@0]: dpo-drop ip6 |
| * @::a:1:1:0:4/126 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]] |
| * [0] [@4]: ipv6-glean: af_packet0 |
| * @::a:1:1:0:7/128 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]] |
| * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0 |
| * fe80::/10 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]] |
| * [0] [@2]: dpo-receive |
| * fe80::fe:3eff:fe3e:9222/128 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]] |
| * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0 |
| * ff02::1/128 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]] |
| * [0] [@2]: dpo-receive |
| * ff02::2/128 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]] |
| * [0] [@2]: dpo-receive |
| * ff02::16/128 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]] |
| * [0] [@2]: dpo-receive |
| * ff02::1:ff00:0/104 |
| * unicast-ip6-chain |
| * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]] |
| * [0] [@2]: dpo-receive |
| * @cliexend |
| * @endparblock |
| ?*/ |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) = |
| { |
| .path = "set ip6 flow-hash", |
| .short_help = |
| "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]", |
| .function = set_ip6_flow_hash_command_fn, |
| }; |
| /* *INDENT-ON* */ |
| |
| static clib_error_t * |
| show_ip6_local_command_fn (vlib_main_t * vm, |
| unformat_input_t * input, vlib_cli_command_t * cmd) |
| { |
| ip6_main_t *im = &ip6_main; |
| ip_lookup_main_t *lm = &im->lookup_main; |
| int i; |
| |
| vlib_cli_output (vm, "Protocols handled by ip6_local"); |
| for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++) |
| { |
| if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT) |
| vlib_cli_output (vm, "%d", i); |
| } |
| return 0; |
| } |
| |
| |
| |
| /*? |
| * Display the set of protocols handled by the local IPv6 stack. |
| * |
| * @cliexpar |
| * Example of how to display local protocol table: |
| * @cliexstart{show ip6 local} |
| * Protocols handled by ip6_local |
| * 17 |
| * 43 |
| * 58 |
| * 115 |
| * @cliexend |
| ?*/ |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (show_ip6_local, static) = |
| { |
| .path = "show ip6 local", |
| .function = show_ip6_local_command_fn, |
| .short_help = "show ip6 local", |
| }; |
| /* *INDENT-ON* */ |
| |
| int |
| vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index, |
| u32 table_index) |
| { |
| vnet_main_t *vnm = vnet_get_main (); |
| vnet_interface_main_t *im = &vnm->interface_main; |
| ip6_main_t *ipm = &ip6_main; |
| ip_lookup_main_t *lm = &ipm->lookup_main; |
| vnet_classify_main_t *cm = &vnet_classify_main; |
| ip6_address_t *if_addr; |
| |
| if (pool_is_free_index (im->sw_interfaces, sw_if_index)) |
| return VNET_API_ERROR_NO_MATCHING_INTERFACE; |
| |
| if (table_index != ~0 && pool_is_free_index (cm->tables, table_index)) |
| return VNET_API_ERROR_NO_SUCH_ENTRY; |
| |
| vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index); |
| lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index; |
| |
| if_addr = ip6_interface_first_address (ipm, sw_if_index); |
| |
| if (NULL != if_addr) |
| { |
| fib_prefix_t pfx = { |
| .fp_len = 128, |
| .fp_proto = FIB_PROTOCOL_IP6, |
| .fp_addr.ip6 = *if_addr, |
| }; |
| u32 fib_index; |
| |
| fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, |
| sw_if_index); |
| |
| |
| if (table_index != (u32) ~ 0) |
| { |
| dpo_id_t dpo = DPO_INVALID; |
| |
| dpo_set (&dpo, |
| DPO_CLASSIFY, |
| DPO_PROTO_IP6, |
| classify_dpo_create (DPO_PROTO_IP6, table_index)); |
| |
| fib_table_entry_special_dpo_add (fib_index, |
| &pfx, |
| FIB_SOURCE_CLASSIFY, |
| FIB_ENTRY_FLAG_NONE, &dpo); |
| dpo_reset (&dpo); |
| } |
| else |
| { |
| fib_table_entry_special_remove (fib_index, |
| &pfx, FIB_SOURCE_CLASSIFY); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static clib_error_t * |
| set_ip6_classify_command_fn (vlib_main_t * vm, |
| unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| u32 table_index = ~0; |
| int table_index_set = 0; |
| u32 sw_if_index = ~0; |
| int rv; |
| |
| while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
| { |
| if (unformat (input, "table-index %d", &table_index)) |
| table_index_set = 1; |
| else if (unformat (input, "intfc %U", unformat_vnet_sw_interface, |
| vnet_get_main (), &sw_if_index)) |
| ; |
| else |
| break; |
| } |
| |
| if (table_index_set == 0) |
| return clib_error_return (0, "classify table-index must be specified"); |
| |
| if (sw_if_index == ~0) |
| return clib_error_return (0, "interface / subif must be specified"); |
| |
| rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index); |
| |
| switch (rv) |
| { |
| case 0: |
| break; |
| |
| case VNET_API_ERROR_NO_MATCHING_INTERFACE: |
| return clib_error_return (0, "No such interface"); |
| |
| case VNET_API_ERROR_NO_SUCH_ENTRY: |
| return clib_error_return (0, "No such classifier table"); |
| } |
| return 0; |
| } |
| |
| /*? |
| * Assign a classification table to an interface. The classification |
| * table is created using the '<em>classify table</em>' and '<em>classify session</em>' |
| * commands. Once the table is create, use this command to filter packets |
| * on an interface. |
| * |
| * @cliexpar |
| * Example of how to assign a classification table to an interface: |
| * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1} |
| ?*/ |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (set_ip6_classify_command, static) = |
| { |
| .path = "set ip6 classify", |
| .short_help = |
| "set ip6 classify intfc <interface> table-index <classify-idx>", |
| .function = set_ip6_classify_command_fn, |
| }; |
| /* *INDENT-ON* */ |
| |
| static clib_error_t * |
| ip6_config (vlib_main_t * vm, unformat_input_t * input) |
| { |
| ip6_main_t *im = &ip6_main; |
| uword heapsize = 0; |
| u32 tmp; |
| u32 nbuckets = 0; |
| |
| while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
| { |
| if (unformat (input, "hash-buckets %d", &tmp)) |
| nbuckets = tmp; |
| else if (unformat (input, "heap-size %dm", &tmp)) |
| heapsize = ((u64) tmp) << 20; |
| else if (unformat (input, "heap-size %dM", &tmp)) |
| heapsize = ((u64) tmp) << 20; |
| else if (unformat (input, "heap-size %dg", &tmp)) |
| heapsize = ((u64) tmp) << 30; |
| else if (unformat (input, "heap-size %dG", &tmp)) |
| heapsize = ((u64) tmp) << 30; |
| else |
| return clib_error_return (0, "unknown input '%U'", |
| format_unformat_error, input); |
| } |
| |
| im->lookup_table_nbuckets = nbuckets; |
| im->lookup_table_size = heapsize; |
| |
| return 0; |
| } |
| |
| VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6"); |
| |
| /* |
| * fd.io coding-style-patch-verification: ON |
| * |
| * Local Variables: |
| * eval: (c-set-style "gnu") |
| * End: |
| */ |