/* * 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/ip_frag.h> #include <vnet/ip/ip6_link.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 <vnet/classify/vnet_classify.h> #ifndef CLIB_MARCH_VARIANT #include <vppinfra/bihash_template.c> #endif #include <vnet/ip/ip6_forward.h> #include <vnet/ipsec/ipsec_tun.h> #include <vnet/interface_output.h> /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */ #define OI_DECAP 0x80000000 static void ip6_add_interface_prefix_routes (ip6_main_t * im, u32 sw_if_index, u32 fib_index, ip6_address_t * address, u32 address_length) { ip_lookup_main_t *lm = &im->lookup_main; ip_interface_prefix_t *if_prefix; /* *INDENT-OFF* */ ip_interface_prefix_key_t key = { .prefix = { .fp_len = address_length, .fp_proto = FIB_PROTOCOL_IP6, .fp_addr.ip6 = { .as_u64 = { address->as_u64[0] & im->fib_masks[address_length].as_u64[0], address->as_u64[1] & im->fib_masks[address_length].as_u64[1], }, }, }, .sw_if_index = sw_if_index, }; /* *INDENT-ON* */ /* If prefix already set on interface, just increment ref count & return */ if_prefix = ip_get_interface_prefix (lm, &key); if (if_prefix) { if_prefix->ref_count += 1; return; } /* New prefix - allocate a pool entry, initialize it, add to the hash */ pool_get (lm->if_prefix_pool, if_prefix); if_prefix->ref_count = 1; clib_memcpy (&if_prefix->key, &key, sizeof (key)); mhash_set (&lm->prefix_to_if_prefix_index, &key, if_prefix - lm->if_prefix_pool, 0 /* old value */ ); /* length < 128 - add glean */ if (address_length < 128) { /* set the glean route for the prefix */ fib_table_entry_update_one_path (fib_index, &key.prefix, FIB_SOURCE_INTERFACE, (FIB_ENTRY_FLAG_CONNECTED | FIB_ENTRY_FLAG_ATTACHED), DPO_PROTO_IP6, /* No next-hop address */ NULL, sw_if_index, /* invalid FIB index */ ~0, 1, /* no out-label stack */ NULL, FIB_ROUTE_PATH_FLAG_NONE); } } static void ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index, ip6_main_t * im, u32 fib_index, ip_interface_address_t * a) { ip_lookup_main_t *lm = &im->lookup_main; ip6_address_t *address = ip_interface_address_get_address (lm, a); fib_prefix_t pfx = { .fp_len = a->address_length, .fp_proto = FIB_PROTOCOL_IP6, .fp_addr.ip6 = *address, }; /* set special routes for the prefix if needed */ ip6_add_interface_prefix_routes (im, sw_if_index, fib_index, address, a->address_length); pfx.fp_len = 128; if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index)) { 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_prefix_routes (ip6_main_t * im, u32 sw_if_index, u32 fib_index, ip6_address_t * address, u32 address_length) { ip_lookup_main_t *lm = &im->lookup_main; ip_interface_prefix_t *if_prefix; /* *INDENT-OFF* */ ip_interface_prefix_key_t key = { .prefix = { .fp_len = address_length, .fp_proto = FIB_PROTOCOL_IP6, .fp_addr.ip6 = { .as_u64 = { address->as_u64[0] & im->fib_masks[address_length].as_u64[0], address->as_u64[1] & im->fib_masks[address_length].as_u64[1], }, }, }, .sw_if_index = sw_if_index, }; /* *INDENT-ON* */ if_prefix = ip_get_interface_prefix (lm, &key); if (!if_prefix) { clib_warning ("Prefix not found while deleting %U", format_ip4_address_and_length, address, address_length); return; } /* If not deleting last intf addr in prefix, decrement ref count & return */ if_prefix->ref_count -= 1; if (if_prefix->ref_count > 0) return; /* length <= 128, delete glean route */ if (address_length <= 128) { /* remove glean route for prefix */ fib_table_entry_delete (fib_index, &key.prefix, FIB_SOURCE_INTERFACE); } mhash_unset (&lm->prefix_to_if_prefix_index, &key, 0 /* old_value */ ); pool_put (lm->if_prefix_pool, if_prefix); } static void ip6_del_interface_routes (u32 sw_if_index, ip6_main_t * im, u32 fib_index, ip6_address_t * address, u32 address_length) { fib_prefix_t pfx = { .fp_len = 128, .fp_proto = FIB_PROTOCOL_IP6, .fp_addr.ip6 = *address, }; /* delete special routes for the prefix if needed */ ip6_del_interface_prefix_routes (im, sw_if_index, fib_index, address, address_length); fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE); } #ifndef CLIB_MARCH_VARIANT void ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable) { ip6_main_t *im = &ip6_main; vnet_main_t *vnm = vnet_get_main (); vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index); 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-not-enabled", sw_if_index, !is_enable, 0, 0); vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled", sw_if_index, !is_enable, 0, 0); if (is_enable) hi->l3_if_count++; else if (hi->l3_if_count) hi->l3_if_count--; } /* 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 = NULL; u32 if_address_index; ip6_address_fib_t ip6_af, *addr_fib = 0; const ip6_address_t *ll_addr; /* local0 interface doesn't support IP addressing */ if (sw_if_index == 0) { return clib_error_create ("local0 interface doesn't support IP addressing"); } if (ip6_address_is_link_local_unicast (address)) { if (address_length != 128) { vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH; return clib_error_create ("prefix length of link-local address must be 128"); } if (!is_del) { int rv; rv = ip6_link_set_local_address (sw_if_index, address); if (rv) { vnm->api_errno = rv; return clib_error_create ("address not assignable"); } } else { ll_addr = ip6_get_link_local_address (sw_if_index); if (ip6_address_is_equal (ll_addr, address)) { vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE; return clib_error_create ("address not deletable"); } else { vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE; return clib_error_create ("address not found"); } } return (NULL); } 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); /* *INDENT-OFF* */ if (!is_del) { /* When adding an address check that it does not conflict with an existing address on any interface in this table. */ ip_interface_address_t *ia; vnet_sw_interface_t *sif; pool_foreach(sif, vnm->interface_main.sw_interfaces, ({ if (im->fib_index_by_sw_if_index[sw_if_index] == im->fib_index_by_sw_if_index[sif->sw_if_index]) { foreach_ip_interface_address (&im->lookup_main, ia, sif->sw_if_index, 0 /* honor unnumbered */ , ({ ip6_address_t * x = ip_interface_address_get_address (&im->lookup_main, ia); if (ip6_destination_matches_route (im, address, x, ia->address_length) || ip6_destination_matches_route (im, x, address, address_length)) { /* an intf may have >1 addr from the same prefix */ if ((sw_if_index == sif->sw_if_index) && (ia->address_length == address_length) && !ip6_address_is_equal (x, address)) continue; if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE) /* if the address we're comparing against is stale * then the CP has not added this one back yet, maybe * it never will, so we have to assume it won't and * ignore it. if it does add it back, then it will fail * because this one is now present */ continue; /* error if the length or intf was different */ vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS; error = clib_error_create ("failed to add %U which conflicts with %U for interface %U", format_ip6_address_and_length, address, address_length, format_ip6_address_and_length, x, ia->address_length, format_vnet_sw_if_index_name, vnm, sif->sw_if_index); goto done; } })); } })); } /* *INDENT-ON* */ if_address_index = ip_interface_address_find (lm, addr_fib, address_length); if (is_del) { if (~0 == if_address_index) { vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE; error = clib_error_create ("%U not found for interface %U", lm->format_address_and_length, addr_fib, address_length, format_vnet_sw_if_index_name, vnm, sw_if_index); goto done; } error = ip_interface_address_del (lm, vnm, if_address_index, addr_fib, address_length, sw_if_index); if (error) goto done; } else { if (~0 != if_address_index) { ip_interface_address_t *ia; ia = pool_elt_at_index (lm->if_address_pool, if_address_index); if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE) { if (ia->sw_if_index == sw_if_index) { /* re-adding an address during the replace action. * consdier this the update. clear the flag and * we're done */ ia->flags &= ~IP_INTERFACE_ADDRESS_FLAG_STALE; goto done; } else { /* The prefix is moving from one interface to another. * delete the stale and add the new */ ip6_add_del_interface_address (vm, ia->sw_if_index, address, address_length, 1); ia = NULL; error = ip_interface_address_add (lm, sw_if_index, addr_fib, address_length, &if_address_index); } } else { vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS; error = clib_error_create ("Prefix %U already found on interface %U", lm->format_address_and_length, addr_fib, address_length, format_vnet_sw_if_index_name, vnm, ia->sw_if_index); } } else error = ip_interface_address_add (lm, sw_if_index, addr_fib, address_length, &if_address_index); } if (error) goto done; ip6_sw_interface_enable_disable (sw_if_index, !is_del); if (!is_del) ip6_link_enable (sw_if_index, NULL); /* intf addr routes are added/deleted on admin up/down */ if (vnet_sw_interface_is_admin_up (vnm, sw_if_index)) { if (is_del) ip6_del_interface_routes (sw_if_index, im, ip6_af.fib_index, address, address_length); else ip6_add_interface_routes (vnm, sw_if_index, im, ip6_af.fib_index, 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); if (is_del) ip6_link_disable (sw_if_index); done: vec_free (addr_fib); return error; } #endif static 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 (sw_if_index, 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"), .last_in_arc = "ip6-lookup", .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 ("ipsec6-input-feature"), }; VNET_FEATURE_INIT (ip6_ipsec, static) = { .arc_name = "ip6-unicast", .node_name = "ipsec6-input-feature", .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_not_enabled, static) = { .arc_name = "ip6-unicast", .node_name = "ip6-not-enabled", .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"), .last_in_arc = "ip6-mfib-forward-lookup", .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_not_enabled_mc, static) = { .arc_name = "ip6-multicast", .node_name = "ip6-not-enabled", .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", "ip6-dvr-dpo"), .last_in_arc = "interface-output", .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index, }; VNET_FEATURE_INIT (ip6_outacl, static) = { .arc_name = "ip6-output", .node_name = "ip6-outacl", .runs_before = VNET_FEATURES ("ipsec6-output-feature"), }; VNET_FEATURE_INIT (ip6_ipsec_output, static) = { .arc_name = "ip6-output", .node_name = "ipsec6-output-feature", .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* */ static 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 (); vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0); /* *INDENT-OFF* */ foreach_ip_interface_address (lm6, ia, sw_if_index, 0, ({ 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-not-enabled", sw_if_index, is_add, 0, 0); vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled", sw_if_index, is_add, 0, 0); return /* no error */ 0; } VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del); VLIB_NODE_FN (ip6_lookup_node) (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) = { .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_FN (ip6_load_balance_node) (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; u32 thread_index = vm->thread_index; ip6_main_t *im = &ip6_main; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; u16 nexts[VLIB_FRAME_SIZE], *next; from = vlib_frame_vector_args (frame); n_left = frame->n_vectors; next = nexts; vlib_get_buffers (vm, from, bufs, n_left); while (n_left >= 4) { const load_balance_t *lb0, *lb1; const ip6_header_t *ip0, *ip1; u32 lbi0, hc0, lbi1, hc1; const dpo_id_t *dpo0, *dpo1; /* Prefetch next iteration. */ { vlib_prefetch_buffer_header (b[2], STORE); vlib_prefetch_buffer_header (b[3], STORE); CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE); CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE); } ip0 = vlib_buffer_get_current (b[0]); ip1 = vlib_buffer_get_current (b[1]); lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX]; lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX]; lb0 = load_balance_get (lbi0); lb1 = load_balance_get (lbi1); /* * this node is for via FIBs we can re-use the hash value from the * to node if present. * We don't want to use the same hash value at each level in the recursion * graph as that would lead to polarisation */ hc0 = hc1 = 0; if (PREDICT_FALSE (lb0->lb_n_buckets > 1)) { if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash)) { hc0 = vnet_buffer (b[0])->ip.flow_hash = vnet_buffer (b[0])->ip.flow_hash >> 1; } else { hc0 = vnet_buffer (b[0])->ip.flow_hash = ip6_compute_flow_hash (ip0, lb0->lb_hash_config); } dpo0 = load_balance_get_fwd_bucket (lb0, (hc0 & (lb0->lb_n_buckets_minus_1))); } else { dpo0 = load_balance_get_bucket_i (lb0, 0); } if (PREDICT_FALSE (lb1->lb_n_buckets > 1)) { if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash)) { hc1 = vnet_buffer (b[1])->ip.flow_hash = vnet_buffer (b[1])->ip.flow_hash >> 1; } else { hc1 = vnet_buffer (b[1])->ip.flow_hash = ip6_compute_flow_hash (ip1, lb1->lb_hash_config); } dpo1 = load_balance_get_fwd_bucket (lb1, (hc1 & (lb1->lb_n_buckets_minus_1))); } else { dpo1 = load_balance_get_bucket_i (lb1, 0); } next[0] = dpo0->dpoi_next_node; next[1] = 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)) { next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ? (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0]; } /* Only process the HBH Option Header if explicitly configured to do so */ if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS)) { next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ? (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1]; } vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index; vlib_increment_combined_counter (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0])); vlib_increment_combined_counter (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1])); b += 2; next += 2; n_left -= 2; } while (n_left > 0) { const load_balance_t *lb0; const ip6_header_t *ip0; const dpo_id_t *dpo0; u32 lbi0, hc0; ip0 = vlib_buffer_get_current (b[0]); lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX]; lb0 = load_balance_get (lbi0); hc0 = 0; if (PREDICT_FALSE (lb0->lb_n_buckets > 1)) { if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash)) { hc0 = vnet_buffer (b[0])->ip.flow_hash = vnet_buffer (b[0])->ip.flow_hash >> 1; } else { hc0 = vnet_buffer (b[0])->ip.flow_hash = ip6_compute_flow_hash (ip0, lb0->lb_hash_config); } dpo0 = load_balance_get_fwd_bucket (lb0, (hc0 & (lb0->lb_n_buckets_minus_1))); } else { dpo0 = load_balance_get_bucket_i (lb0, 0); } next[0] = dpo0->dpoi_next_node; vnet_buffer (b[0])->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)) { next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ? (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0]; } vlib_increment_combined_counter (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0])); b += 1; next += 1; n_left -= 1; } vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); if (node->flags & VLIB_NODE_FLAG_TRACE) ip6_forward_next_trace (vm, node, frame, VLIB_TX); return frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (ip6_load_balance_node) = { .name = "ip6-load-balance", .vector_size = sizeof (u32), .sibling_of = "ip6-lookup", .format_trace = format_ip6_lookup_trace, }; /* *INDENT-ON* */ 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; #ifndef CLIB_MARCH_VARIANT 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 *); u32 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; } #endif 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 *); u32 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 *); u32 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->packet_data, sizeof (t->packet_data)); return s; } /* Common trace function for all ip6-forward next nodes. */ #ifndef CLIB_MARCH_VARIANT 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_fast (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_fast (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_fast (t0->packet_data, vlib_buffer_get_current (b0), sizeof (t0->packet_data)); } from += 1; n_left -= 1; } } /* 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 = 0; u16 payload_length, payload_length_host_byte_order; u32 i; u32 headers_size = sizeof (ip0[0]); u8 *data_this_buffer; u8 next_hdr = ip0->protocol; ASSERT (bogus_lengthp); *bogus_lengthp = 0; payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length); data_this_buffer = (u8 *) (ip0 + 1); payload_length = ip0->payload_length; /* 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 (next_hdr == 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; /* pseudo-header adjustments: * exclude ext header bytes from payload length * use payload IP proto rather than ext header IP proto */ payload_length = clib_host_to_net_u16 (payload_length_host_byte_order); next_hdr = ext_hdr->next_hdr; } /* Initialize checksum with ip pseudo-header. */ sum0 = payload_length + clib_host_to_net_u16 (next_hdr); 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)); } if (p0) return ip_calculate_l4_checksum (vm, p0, sum0, payload_length_host_byte_order, (u8 *) ip0, headers_size, NULL); else return ip_calculate_l4_checksum (vm, 0, sum0, payload_length_host_byte_order, NULL, 0, data_this_buffer); } 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; } #endif /** * @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; u32 fib_index; fib_index = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (b)->sw_if_index[VLIB_RX]); fib_index = (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX]; lbi = ip6_fib_table_fwding_lookup (fib_index, &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_always_inline u8 ip6_tcp_udp_icmp_bad_length (vlib_main_t * vm, vlib_buffer_t * p0) { u16 payload_length_host_byte_order; u32 n_this_buffer, n_bytes_left; ip6_header_t *ip0 = vlib_buffer_get_current (p0); u32 headers_size = sizeof (ip0[0]); u8 *data_this_buffer; data_this_buffer = (u8 *) (ip0 + 1); ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *) data_this_buffer; /* validate really icmp6 next */ if (!(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6) || (ext_hdr->next_hdr == IP_PROTOCOL_UDP)) return 0; payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length); n_bytes_left = n_this_buffer = payload_length_host_byte_order; u32 n_ip_bytes_this_buffer = p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data); if (n_this_buffer + headers_size > n_ip_bytes_this_buffer) { n_this_buffer = p0->current_length > headers_size ? n_ip_bytes_this_buffer - headers_size : 0; } n_bytes_left -= n_this_buffer; n_bytes_left -= p0->total_length_not_including_first_buffer; if (n_bytes_left == 0) return 0; else return 1; } always_inline 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; u32 *from, n_left_from; 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; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; u16 nexts[VLIB_FRAME_SIZE], *next; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; if (node->flags & VLIB_NODE_FLAG_TRACE) ip6_forward_next_trace (vm, node, frame, VLIB_TX); vlib_get_buffers (vm, from, bufs, n_left_from); b = bufs; next = nexts; while (n_left_from > 2) { /* Prefetch next iteration. */ if (n_left_from >= 6) { vlib_prefetch_buffer_header (b[4], STORE); vlib_prefetch_buffer_header (b[5], STORE); vlib_prefetch_buffer_data (b[2], LOAD); vlib_prefetch_buffer_data (b[3], LOAD); } u8 error[2]; error[0] = IP6_ERROR_UNKNOWN_PROTOCOL; error[1] = IP6_ERROR_UNKNOWN_PROTOCOL; ip6_header_t *ip[2]; ip[0] = vlib_buffer_get_current (b[0]); ip[1] = vlib_buffer_get_current (b[1]); if (head_of_feature_arc) { vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data; vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data; u8 type[2]; type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol]; type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol]; u32 flags[2]; flags[0] = b[0]->flags; flags[1] = b[1]->flags; u32 good_l4_csum[2]; good_l4_csum[0] = flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT | VNET_BUFFER_F_OFFLOAD_TCP_CKSUM | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM); good_l4_csum[1] = flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT | VNET_BUFFER_F_OFFLOAD_TCP_CKSUM | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM); u32 udp_offset[2] = { }; u8 is_tcp_udp[2]; is_tcp_udp[0] = ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]); is_tcp_udp[1] = ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]); i16 len_diff[2] = { 0 }; if (PREDICT_TRUE (is_tcp_udp[0])) { udp_header_t *udp = (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]); good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP && udp->checksum == 0; /* optimistically verify UDP length. */ u16 ip_len, udp_len; ip_len = clib_net_to_host_u16 (ip[0]->payload_length); udp_len = clib_net_to_host_u16 (udp->length); len_diff[0] = ip_len - udp_len; } if (PREDICT_TRUE (is_tcp_udp[1])) { udp_header_t *udp = (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]); good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP && udp->checksum == 0; /* optimistically verify UDP length. */ u16 ip_len, udp_len; ip_len = clib_net_to_host_u16 (ip[1]->payload_length); udp_len = clib_net_to_host_u16 (udp->length); len_diff[1] = ip_len - udp_len; } good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN; good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN; len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0; len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0; u8 need_csum[2]; need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum[0] && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED); need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum[1] && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED); if (PREDICT_FALSE (need_csum[0])) { flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]); good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT; error[0] = IP6_ERROR_UNKNOWN_PROTOCOL; } else { if (ip6_tcp_udp_icmp_bad_length (vm, b[0])) error[0] = IP6_ERROR_BAD_LENGTH; } if (PREDICT_FALSE (need_csum[1])) { flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]); good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT; error[1] = IP6_ERROR_UNKNOWN_PROTOCOL; } else { if (ip6_tcp_udp_icmp_bad_length (vm, b[1])) error[1] = IP6_ERROR_BAD_LENGTH; } error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0]; error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1]; STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP == IP6_ERROR_UDP_CHECKSUM, "Wrong IP6 errors constants"); STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP == IP6_ERROR_ICMP_CHECKSUM, "Wrong IP6 errors constants"); error[0] = !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0]; error[1] = !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1]; /* Drop packets from unroutable hosts. */ /* If this is a neighbor solicitation (ICMP), skip source RPF check */ u8 unroutable[2]; unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL && type[0] != IP_BUILTIN_PROTOCOL_ICMP && !ip6_address_is_link_local_unicast (&ip[0]->src_address); unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL && type[1] != IP_BUILTIN_PROTOCOL_ICMP && !ip6_address_is_link_local_unicast (&ip[1]->src_address); if (PREDICT_FALSE (unroutable[0])) { error[0] = !ip6_urpf_loose_check (im, b[0], ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS : error[0]; } if (PREDICT_FALSE (unroutable[1])) { error[1] = !ip6_urpf_loose_check (im, b[1], ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS : error[1]; } vnet_buffer (b[0])->ip.fib_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ? vnet_buffer (b[0])->sw_if_index[VLIB_TX] : vnet_buffer (b[0])->ip.fib_index; vnet_buffer (b[1])->ip.fib_index = vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ? vnet_buffer (b[1])->sw_if_index[VLIB_TX] : vnet_buffer (b[1])->ip.fib_index; } /* head_of_feature_arc */ next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol]; next[0] = error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0]; next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol]; next[1] = error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1]; b[0]->error = error_node->errors[0]; b[1]->error = error_node->errors[1]; if (head_of_feature_arc) { u8 ip6_unknown[2]; ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL; ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL; if (PREDICT_TRUE (ip6_unknown[0])) { u32 next32 = next[0]; vnet_feature_arc_start (arc_index, vnet_buffer (b[0])->sw_if_index [VLIB_RX], &next32, b[0]); next[0] = next32; } if (PREDICT_TRUE (ip6_unknown[1])) { u32 next32 = next[1]; vnet_feature_arc_start (arc_index, vnet_buffer (b[1])->sw_if_index [VLIB_RX], &next32, b[1]); next[1] = next32; } } /* next */ b += 2; next += 2; n_left_from -= 2; } while (n_left_from) { u8 error; error = IP6_ERROR_UNKNOWN_PROTOCOL; ip6_header_t *ip; ip = vlib_buffer_get_current (b[0]); if (head_of_feature_arc) { vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data; u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol]; u32 flags = b[0]->flags; u32 good_l4_csum = flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT | VNET_BUFFER_F_OFFLOAD_TCP_CKSUM | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM); u32 udp_offset; i16 len_diff = 0; u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset); if (PREDICT_TRUE (is_tcp_udp)) { udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset); /* Don't verify UDP checksum for packets with explicit zero checksum. */ good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP && udp->checksum == 0; /* optimistically verify UDP length. */ u16 ip_len, udp_len; ip_len = clib_net_to_host_u16 (ip->payload_length); udp_len = clib_net_to_host_u16 (udp->length); len_diff = ip_len - udp_len; } good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN; len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0; u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED); if (PREDICT_FALSE (need_csum)) { flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]); good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT; error = IP6_ERROR_UNKNOWN_PROTOCOL; } else { if (ip6_tcp_udp_icmp_bad_length (vm, b[0])) error = IP6_ERROR_BAD_LENGTH; } error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error; STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP == IP6_ERROR_UDP_CHECKSUM, "Wrong IP6 errors constants"); STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP == IP6_ERROR_ICMP_CHECKSUM, "Wrong IP6 errors constants"); error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error; /* Drop packets from unroutable hosts. */ /* If this is a neighbor solicitation (ICMP), skip source RPF check */ u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL && type != IP_BUILTIN_PROTOCOL_ICMP && !ip6_address_is_link_local_unicast (&ip->src_address); if (PREDICT_FALSE (unroutable)) { error = !ip6_urpf_loose_check (im, b[0], ip) ? IP6_ERROR_SRC_LOOKUP_MISS : error; } vnet_buffer (b[0])->ip.fib_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ? vnet_buffer (b[0])->sw_if_index[VLIB_TX] : vnet_buffer (b[0])->ip.fib_index; } /* head_of_feature_arc */ next[0] = lm->local_next_by_ip_protocol[ip->protocol]; next[0] = error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0]; b[0]->error = error_node->errors[0]; if (head_of_feature_arc) { if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL)) { u32 next32 = next[0]; vnet_feature_arc_start (arc_index, vnet_buffer (b[0])->sw_if_index [VLIB_RX], &next32, b[0]); next[0] = next32; } } /* next */ b += 1; next += 1; n_left_from -= 1; } vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); return frame->n_vectors; } VLIB_NODE_FN (ip6_local_node) (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) = { .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] = "ip6-drop", [IP_LOCAL_NEXT_PUNT] = "ip6-punt", [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup", [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input", [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly", }, }; /* *INDENT-ON* */ VLIB_NODE_FN (ip6_local_end_of_arc_node) (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) = { .name = "ip6-local-end-of-arc", .vector_size = sizeof (u32), .format_trace = format_ip6_forward_next_trace, .sibling_of = "ip6-local", }; 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* */ #ifdef CLIB_MARCH_VARIANT extern vlib_node_registration_t ip6_local_node; #else 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); } void ip6_unregister_protocol (u32 protocol) { ip6_main_t *im = &ip6_main; ip_lookup_main_t *lm = &im->lookup_main; ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol)); lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT; } #endif typedef enum { IP6_REWRITE_NEXT_DROP, IP6_REWRITE_NEXT_ICMP_ERROR, IP6_REWRITE_NEXT_FRAGMENT, IP6_REWRITE_N_NEXT /* Last */ } ip6_rewrite_next_t; /** * This bits of an IPv6 address to mask to construct a multicast * MAC address */ #define IP6_MCAST_ADDR_MASK 0xffffffff always_inline void ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes, u16 adj_packet_bytes, bool is_locally_generated, u32 * next, u8 is_midchain, u32 * error) { if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes) { if (is_locally_generated) { /* IP fragmentation */ ip_frag_set_vnet_buffer (b, adj_packet_bytes, (is_midchain ? IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN : IP_FRAG_NEXT_IP_REWRITE), 0); *next = IP6_REWRITE_NEXT_FRAGMENT; *error = IP6_ERROR_MTU_EXCEEDED; } else { *error = IP6_ERROR_MTU_EXCEEDED; icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0, adj_packet_bytes); *next = IP6_REWRITE_NEXT_ICMP_ERROR; } } } always_inline uword ip6_rewrite_inline_with_gso (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 = vm->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) { const 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; bool is_locally_originated0, is_locally_originated1; /* 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; is_locally_originated0 = p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED; if (PREDICT_TRUE (!is_locally_originated0)) { 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); } } is_locally_originated1 = p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED; if (PREDICT_TRUE (!is_locally_originated1)) { 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); } } 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. */ u16 ip0_len = clib_net_to_host_u16 (ip0->payload_length) + sizeof (ip6_header_t); u16 ip1_len = clib_net_to_host_u16 (ip1->payload_length) + sizeof (ip6_header_t); if (p0->flags & VNET_BUFFER_F_GSO) ip0_len = gso_mtu_sz (p0); if (p1->flags & VNET_BUFFER_F_GSO) ip1_len = gso_mtu_sz (p1); ip6_mtu_check (p0, ip0_len, adj0[0].rewrite_header.max_l3_packet_bytes, is_locally_originated0, &next0, is_midchain, &error0); ip6_mtu_check (p1, ip1_len, adj1[0].rewrite_header.max_l3_packet_bytes, is_locally_originated1, &next1, is_midchain, &error1); /* Don't adjust the buffer for hop count issue; icmp-error node * wants to see the IP header */ 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_w_cfg_index (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0, adj0->ia_cfg_index); } else { p0->error = error_node->errors[error0]; } 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_w_cfg_index (lm->output_feature_arc_index, tx_sw_if_index1, &next1, p1, adj1->ia_cfg_index); } else { p1->error = error_node->errors[error1]; } if (is_midchain) { /* before we paint on the next header, update the L4 * checksums if required, since there's no offload on a tunnel */ vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ , 1 /* is_ip6 */ ); vnet_calc_checksums_inline (vm, p1, 0 /* is_ip4 */ , 1 /* is_ip6 */ ); /* Guess we are only writing on ipv6 header. */ vnet_rewrite_two_headers (adj0[0], adj1[0], ip0, ip1, sizeof (ip6_header_t)); } else /* 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) { if (adj0->sub_type.midchain.fixup_func) adj0->sub_type.midchain.fixup_func (vm, adj0, p0, adj0->sub_type.midchain.fixup_data); if (adj1->sub_type.midchain.fixup_func) adj1->sub_type.midchain.fixup_func (vm, adj1, p1, adj1->sub_type.midchain.fixup_data); } if (is_mcast) { /* * copy bytes from the IP address into the MAC rewrite */ vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK, adj0-> rewrite_header.dst_mcast_offset, &ip0->dst_address.as_u32[3], (u8 *) ip0); vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK, adj1-> rewrite_header.dst_mcast_offset, &ip1->dst_address.as_u32[3], (u8 *) 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; bool is_locally_originated0; 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 */ is_locally_originated0 = p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED; if (PREDICT_TRUE (!is_locally_originated0)) { 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); } } if (is_midchain) { vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ , 1 /* is_ip6 */ ); /* Guess we are only writing on ip6 header. */ vnet_rewrite_one_header (adj0[0], ip0, sizeof (ip6_header_t)); } else /* 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. */ u16 ip0_len = clib_net_to_host_u16 (ip0->payload_length) + sizeof (ip6_header_t); if (p0->flags & VNET_BUFFER_F_GSO) ip0_len = gso_mtu_sz (p0); ip6_mtu_check (p0, ip0_len, adj0[0].rewrite_header.max_l3_packet_bytes, is_locally_originated0, &next0, is_midchain, &error0); /* Don't adjust the buffer for hop count issue; icmp-error node * wants to see the IP header */ 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_w_cfg_index (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0, adj0->ia_cfg_index); } else { p0->error = error_node->errors[error0]; } if (is_midchain) { if (adj0->sub_type.midchain.fixup_func) adj0->sub_type.midchain.fixup_func (vm, adj0, p0, adj0->sub_type.midchain.fixup_data); } if (is_mcast) { vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK, adj0-> rewrite_header.dst_mcast_offset, &ip0->dst_address.as_u32[3], (u8 *) ip0); } 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; } 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) { return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters, is_midchain, is_mcast); } VLIB_NODE_FN (ip6_rewrite_node) (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); } VLIB_NODE_FN (ip6_rewrite_bcast_node) (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); } VLIB_NODE_FN (ip6_rewrite_mcast_node) (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); } VLIB_NODE_FN (ip6_midchain_node) (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); } VLIB_NODE_FN (ip6_mcast_midchain_node) (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) = { .name = "ip6-midchain", .vector_size = sizeof (u32), .format_trace = format_ip6_forward_next_trace, .sibling_of = "ip6-rewrite", }; VLIB_REGISTER_NODE (ip6_rewrite_node) = { .name = "ip6-rewrite", .vector_size = sizeof (u32), .format_trace = format_ip6_rewrite_trace, .n_next_nodes = IP6_REWRITE_N_NEXT, .next_nodes = { [IP6_REWRITE_NEXT_DROP] = "ip6-drop", [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error", [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag", }, }; VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = { .name = "ip6-rewrite-bcast", .vector_size = sizeof (u32), .format_trace = format_ip6_rewrite_trace, .sibling_of = "ip6-rewrite", }; VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) = { .name = "ip6-rewrite-mcast", .vector_size = sizeof (u32), .format_trace = format_ip6_rewrite_trace, .sibling_of = "ip6-rewrite", }; VLIB_REGISTER_NODE (ip6_mcast_midchain_node) = { .name = "ip6-mcast-midchain", .vector_size = sizeof (u32), .format_trace = format_ip6_rewrite_trace, .sibling_of = "ip6-rewrite", }; /* *INDENT-ON* */ /* * Hop-by-Hop handling */ #ifndef CLIB_MARCH_VARIANT ip6_hop_by_hop_main_t ip6_hop_by_hop_main; #endif /* CLIB_MARCH_VARIANT */ #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; extern 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 _ }; #ifndef CLIB_MARCH_VARIANT 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; } #endif 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 */ VLIB_NODE_FN (ip6_hop_by_hop_node) (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_fast (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_fast (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_fast (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) = { .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* */ 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; clib_memset (hm->options, 0, sizeof (hm->options)); clib_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); #ifndef CLIB_MARCH_VARIANT 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 ((u32) 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 ((u32) 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; #endif 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); /* 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; return error; } VLIB_INIT_FUNCTION (ip6_lookup_init); #ifndef CLIB_MARCH_VARIANT 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; } #endif 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* */ #ifndef CLIB_MARCH_VARIANT 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; } #endif 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* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */