diff options
Diffstat (limited to 'src/vnet/ip/ip6_forward.c')
| -rw-r--r-- | src/vnet/ip/ip6_forward.c | 3558 |
1 files changed, 3558 insertions, 0 deletions
diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c new file mode 100644 index 00000000..54582d38 --- /dev/null +++ b/src/vnet/ip/ip6_forward.c @@ -0,0 +1,3558 @@ +/* + * 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), + DPO_PROTO_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), + DPO_PROTO_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; + + /* local0 interface doesn't support IP addressing */ + if (sw_if_index == 0) + { + return + clib_error_create ("local0 interface doesn't support IP addressing"); + } + + 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 |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED + | VNET_BUFFER_F_L4_CHECKSUM_CORRECT); + return p0->flags; + } + + sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length); + + p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED + | ((sum16 == 0) << VNET_BUFFER_F_LOG2_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)); +} + +always_inline u8 +ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0, + u32 * udp_offset0) +{ + u32 proto0; + proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0); + if (proto0 != IP_PROTOCOL_UDP) + { + proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0); + proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0; + } + return proto0; +} + +/* *INDENT-OFF* */ +VNET_FEATURE_ARC_INIT (ip6_local) = +{ + .arc_name = "ip6-local", + .start_nodes = VNET_FEATURES ("ip6-local"), +}; +/* *INDENT-ON* */ + +static uword +ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame, int head_of_feature_arc) +{ + 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); + u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_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_csum0, is_tcp_udp0; + u8 error1, type1, good_l4_csum1, is_tcp_udp1; + 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; + + error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL; + + p0 = vlib_get_buffer (vm, pi0); + p1 = vlib_get_buffer (vm, pi1); + + ip0 = vlib_buffer_get_current (p0); + ip1 = vlib_buffer_get_current (p1); + + if (head_of_feature_arc == 0) + goto skip_checks; + + vnet_buffer (p0)->l3_hdr_offset = p0->current_data; + vnet_buffer (p1)->l3_hdr_offset = p1->current_data; + + type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol]; + type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol]; + + flags0 = p0->flags; + flags1 = p1->flags; + + is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0); + is_tcp_udp1 = ip6_next_proto_is_tcp_udp (p1, ip1, &udp_offset1); + + good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + good_l4_csum1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + len_diff0 = 0; + len_diff1 = 0; + + if (PREDICT_TRUE (is_tcp_udp0)) + { + udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0); + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP + && udp0->checksum == 0; + /* Verify UDP length. */ + if (is_tcp_udp0 == IP_PROTOCOL_UDP) + { + 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 (is_tcp_udp1)) + { + udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1); + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP + && udp1->checksum == 0; + /* Verify UDP length. */ + if (is_tcp_udp1 == IP_PROTOCOL_UDP) + { + 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_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN; + good_l4_csum1 |= 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_csum0 + && !(flags0 & + VNET_BUFFER_F_L4_CHECKSUM_COMPUTED))) + { + flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0); + good_l4_csum0 = + (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + } + if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN + && !good_l4_csum1 + && !(flags1 & + VNET_BUFFER_F_L4_CHECKSUM_COMPUTED))) + { + flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1); + good_l4_csum1 = + (flags1 & VNET_BUFFER_F_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_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0); + error1 = (!good_l4_csum1 ? 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); + } + + skip_checks: + + next0 = lm->local_next_by_ip_protocol[ip0->protocol]; + next1 = lm->local_next_by_ip_protocol[ip1->protocol]; + + 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]; + + if (head_of_feature_arc) + { + if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL)) + vnet_feature_arc_start (arc_index, + vnet_buffer (p0)->sw_if_index + [VLIB_RX], &next0, p0); + if (PREDICT_TRUE (error1 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL)) + vnet_feature_arc_start (arc_index, + vnet_buffer (p1)->sw_if_index + [VLIB_RX], &next1, p1); + } + + 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_csum0; + u32 udp_offset0; + u8 is_tcp_udp0; + + pi0 = to_next[0] = from[0]; + from += 1; + n_left_from -= 1; + to_next += 1; + n_left_to_next -= 1; + + error0 = IP6_ERROR_UNKNOWN_PROTOCOL; + + p0 = vlib_get_buffer (vm, pi0); + ip0 = vlib_buffer_get_current (p0); + + if (head_of_feature_arc == 0) + goto skip_check; + + vnet_buffer (p0)->l3_hdr_offset = p0->current_data; + + type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol]; + flags0 = p0->flags; + is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0); + good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + + len_diff0 = 0; + if (PREDICT_TRUE (is_tcp_udp0)) + { + udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0); + /* Don't verify UDP checksum for packets with explicit zero + * checksum. */ + good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP + && udp0->checksum == 0; + /* Verify UDP length. */ + if (is_tcp_udp0 == IP_PROTOCOL_UDP) + { + 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_csum0 |= 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_csum0 + && !(flags0 & + VNET_BUFFER_F_L4_CHECKSUM_COMPUTED))) + { + flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0); + good_l4_csum0 = + (flags0 & VNET_BUFFER_F_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_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0); + + /* If this is a neighbor solicitation (ICMP), skip src 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); + } + + skip_check: + + next0 = lm->local_next_by_ip_protocol[ip0->protocol]; + next0 = + error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0; + p0->error = error_node->errors[error0]; + + if (head_of_feature_arc) + { + if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL)) + vnet_feature_arc_start (arc_index, + vnet_buffer (p0)->sw_if_index + [VLIB_RX], &next0, p0); + } + + 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; +} + +static uword +ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ ); +} + +/* *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); + + +static uword +ip6_local_end_of_arc (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ ); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip6_local_end_of_arc_node,static) = { + .function = ip6_local_end_of_arc, + .name = "ip6-local-end-of-arc", + .vector_size = sizeof (u32), + + .format_trace = format_ip6_forward_next_trace, + .sibling_of = "ip6-local", +}; + +VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_end_of_arc_node, ip6_local_end_of_arc) + +VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = { + .arc_name = "ip6-local", + .node_name = "ip6-local-end-of-arc", + .runs_before = 0, /* not before any other features */ +}; +/* *INDENT-ON* */ + +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]; + + if (PREDICT_FALSE (!hi->hw_address)) + { + return clib_error_return (0, "%U: interface %U do not support ip probe", + format_ip6_address, dst, + format_vnet_sw_if_index_name, vnm, + sw_if_index); + } + + 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); + + /* Peer has been previously resolved, retrieve glean adj instead */ + if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE) + { + adj_unlock (ai); + ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6, sw_if_index, &nh); + 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_F_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_F_LOCALLY_ORIGINATED; + } + if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_F_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_F_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_F_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_F_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, + FIB_SOURCE_DEFAULT_ROUTE); + mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0, + MFIB_SOURCE_DEFAULT_ROUTE); + + { + 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); + +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) + { + + u32 node_index = vlib_get_node (vm, + ip6_local_node.index)-> + next_nodes[lm->local_next_by_ip_protocol[i]]; + vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm, + node_index); + } + } + 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: + */ |