diff options
Diffstat (limited to 'vnet/vnet/ip/ip4_forward.c')
| -rw-r--r-- | vnet/vnet/ip/ip4_forward.c | 3345 |
1 files changed, 0 insertions, 3345 deletions
diff --git a/vnet/vnet/ip/ip4_forward.c b/vnet/vnet/ip/ip4_forward.c deleted file mode 100644 index 6e91b9e91e1..00000000000 --- a/vnet/vnet/ip/ip4_forward.c +++ /dev/null @@ -1,3345 +0,0 @@ -/* - * Copyright (c) 2015 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/ip4_forward.c: IP v4 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/ethernet/ethernet.h> /* for ethernet_header_t */ -#include <vnet/ethernet/arp_packet.h> /* for ethernet_arp_header_t */ -#include <vnet/ppp/ppp.h> -#include <vnet/srp/srp.h> /* for srp_hw_interface_class */ -#include <vnet/api_errno.h> /* for API error numbers */ -#include <vnet/fib/fib_table.h> /* for FIB table and entry creation */ -#include <vnet/fib/fib_entry.h> /* for FIB table and entry creation */ -#include <vnet/fib/fib_urpf_list.h> /* for FIB uRPF check */ -#include <vnet/fib/ip4_fib.h> -#include <vnet/dpo/load_balance.h> -#include <vnet/dpo/classify_dpo.h> - -/** - * @file - * @brief IPv4 Forwarding. - * - * This file contains the source code for IPv4 forwarding. - */ - -void -ip4_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 -ip4_lookup_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, - int lookup_for_responses_to_locally_received_packets) -{ - ip4_main_t *im = &ip4_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 cpu_index = os_get_cpu_number (); - - 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 >= 8 && n_left_to_next >= 4) - { - vlib_buffer_t *p0, *p1, *p2, *p3; - ip4_header_t *ip0, *ip1, *ip2, *ip3; - __attribute__ ((unused)) tcp_header_t *tcp0, *tcp1, *tcp2, *tcp3; - ip_lookup_next_t next0, next1, next2, next3; - const load_balance_t *lb0, *lb1, *lb2, *lb3; - ip4_fib_mtrie_t *mtrie0, *mtrie1, *mtrie2, *mtrie3; - ip4_fib_mtrie_leaf_t leaf0, leaf1, leaf2, leaf3; - ip4_address_t *dst_addr0, *dst_addr1, *dst_addr2, *dst_addr3; - __attribute__ ((unused)) u32 pi0, fib_index0, lb_index0, - is_tcp_udp0; - __attribute__ ((unused)) u32 pi1, fib_index1, lb_index1, - is_tcp_udp1; - __attribute__ ((unused)) u32 pi2, fib_index2, lb_index2, - is_tcp_udp2; - __attribute__ ((unused)) u32 pi3, fib_index3, lb_index3, - is_tcp_udp3; - flow_hash_config_t flow_hash_config0, flow_hash_config1; - flow_hash_config_t flow_hash_config2, flow_hash_config3; - u32 hash_c0, hash_c1, hash_c2, hash_c3; - const dpo_id_t *dpo0, *dpo1, *dpo2, *dpo3; - - /* Prefetch next iteration. */ - { - vlib_buffer_t *p4, *p5, *p6, *p7; - - p4 = vlib_get_buffer (vm, from[4]); - p5 = vlib_get_buffer (vm, from[5]); - p6 = vlib_get_buffer (vm, from[6]); - p7 = vlib_get_buffer (vm, from[7]); - - vlib_prefetch_buffer_header (p4, LOAD); - vlib_prefetch_buffer_header (p5, LOAD); - vlib_prefetch_buffer_header (p6, LOAD); - vlib_prefetch_buffer_header (p7, LOAD); - - CLIB_PREFETCH (p4->data, sizeof (ip0[0]), LOAD); - CLIB_PREFETCH (p5->data, sizeof (ip0[0]), LOAD); - CLIB_PREFETCH (p6->data, sizeof (ip0[0]), LOAD); - CLIB_PREFETCH (p7->data, sizeof (ip0[0]), LOAD); - } - - pi0 = to_next[0] = from[0]; - pi1 = to_next[1] = from[1]; - pi2 = to_next[2] = from[2]; - pi3 = to_next[3] = from[3]; - - from += 4; - to_next += 4; - n_left_to_next -= 4; - n_left_from -= 4; - - p0 = vlib_get_buffer (vm, pi0); - p1 = vlib_get_buffer (vm, pi1); - p2 = vlib_get_buffer (vm, pi2); - p3 = vlib_get_buffer (vm, pi3); - - ip0 = vlib_buffer_get_current (p0); - ip1 = vlib_buffer_get_current (p1); - ip2 = vlib_buffer_get_current (p2); - ip3 = vlib_buffer_get_current (p3); - - dst_addr0 = &ip0->dst_address; - dst_addr1 = &ip1->dst_address; - dst_addr2 = &ip2->dst_address; - dst_addr3 = &ip3->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_index2 = - vec_elt (im->fib_index_by_sw_if_index, - vnet_buffer (p2)->sw_if_index[VLIB_RX]); - fib_index3 = - vec_elt (im->fib_index_by_sw_if_index, - vnet_buffer (p3)->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]; - fib_index2 = - (vnet_buffer (p2)->sw_if_index[VLIB_TX] == - (u32) ~ 0) ? fib_index2 : vnet_buffer (p2)->sw_if_index[VLIB_TX]; - fib_index3 = - (vnet_buffer (p3)->sw_if_index[VLIB_TX] == - (u32) ~ 0) ? fib_index3 : vnet_buffer (p3)->sw_if_index[VLIB_TX]; - - - if (!lookup_for_responses_to_locally_received_packets) - { - mtrie0 = &ip4_fib_get (fib_index0)->mtrie; - mtrie1 = &ip4_fib_get (fib_index1)->mtrie; - mtrie2 = &ip4_fib_get (fib_index2)->mtrie; - mtrie3 = &ip4_fib_get (fib_index3)->mtrie; - - leaf0 = leaf1 = leaf2 = leaf3 = IP4_FIB_MTRIE_LEAF_ROOT; - - leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, dst_addr0, 0); - leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, dst_addr1, 0); - leaf2 = ip4_fib_mtrie_lookup_step (mtrie2, leaf2, dst_addr2, 0); - leaf3 = ip4_fib_mtrie_lookup_step (mtrie3, leaf3, dst_addr3, 0); - } - - tcp0 = (void *) (ip0 + 1); - tcp1 = (void *) (ip1 + 1); - tcp2 = (void *) (ip2 + 1); - tcp3 = (void *) (ip3 + 1); - - is_tcp_udp0 = (ip0->protocol == IP_PROTOCOL_TCP - || ip0->protocol == IP_PROTOCOL_UDP); - is_tcp_udp1 = (ip1->protocol == IP_PROTOCOL_TCP - || ip1->protocol == IP_PROTOCOL_UDP); - is_tcp_udp2 = (ip2->protocol == IP_PROTOCOL_TCP - || ip2->protocol == IP_PROTOCOL_UDP); - is_tcp_udp3 = (ip1->protocol == IP_PROTOCOL_TCP - || ip1->protocol == IP_PROTOCOL_UDP); - - if (!lookup_for_responses_to_locally_received_packets) - { - leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, dst_addr0, 1); - leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, dst_addr1, 1); - leaf2 = ip4_fib_mtrie_lookup_step (mtrie2, leaf2, dst_addr2, 1); - leaf3 = ip4_fib_mtrie_lookup_step (mtrie3, leaf3, dst_addr3, 1); - } - - if (!lookup_for_responses_to_locally_received_packets) - { - leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, dst_addr0, 2); - leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, dst_addr1, 2); - leaf2 = ip4_fib_mtrie_lookup_step (mtrie2, leaf2, dst_addr2, 2); - leaf3 = ip4_fib_mtrie_lookup_step (mtrie3, leaf3, dst_addr3, 2); - } - - if (!lookup_for_responses_to_locally_received_packets) - { - leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, dst_addr0, 3); - leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, dst_addr1, 3); - leaf2 = ip4_fib_mtrie_lookup_step (mtrie2, leaf2, dst_addr2, 3); - leaf3 = ip4_fib_mtrie_lookup_step (mtrie3, leaf3, dst_addr3, 3); - } - - if (lookup_for_responses_to_locally_received_packets) - { - lb_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_RX]; - lb_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_RX]; - lb_index2 = vnet_buffer (p2)->ip.adj_index[VLIB_RX]; - lb_index3 = vnet_buffer (p3)->ip.adj_index[VLIB_RX]; - } - else - { - /* Handle default route. */ - leaf0 = - (leaf0 == - IP4_FIB_MTRIE_LEAF_EMPTY ? mtrie0->default_leaf : leaf0); - leaf1 = - (leaf1 == - IP4_FIB_MTRIE_LEAF_EMPTY ? mtrie1->default_leaf : leaf1); - leaf2 = - (leaf2 == - IP4_FIB_MTRIE_LEAF_EMPTY ? mtrie2->default_leaf : leaf2); - leaf3 = - (leaf3 == - IP4_FIB_MTRIE_LEAF_EMPTY ? mtrie3->default_leaf : leaf3); - lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0); - lb_index1 = ip4_fib_mtrie_leaf_get_adj_index (leaf1); - lb_index2 = ip4_fib_mtrie_leaf_get_adj_index (leaf2); - lb_index3 = ip4_fib_mtrie_leaf_get_adj_index (leaf3); - } - - lb0 = load_balance_get (lb_index0); - lb1 = load_balance_get (lb_index1); - lb2 = load_balance_get (lb_index2); - lb3 = load_balance_get (lb_index3); - - /* Use flow hash to compute multipath adjacency. */ - hash_c0 = vnet_buffer (p0)->ip.flow_hash = 0; - hash_c1 = vnet_buffer (p1)->ip.flow_hash = 0; - hash_c2 = vnet_buffer (p2)->ip.flow_hash = 0; - hash_c3 = vnet_buffer (p3)->ip.flow_hash = 0; - if (PREDICT_FALSE (lb0->lb_n_buckets > 1)) - { - flow_hash_config0 = lb0->lb_hash_config; - hash_c0 = vnet_buffer (p0)->ip.flow_hash = - ip4_compute_flow_hash (ip0, flow_hash_config0); - } - if (PREDICT_FALSE (lb1->lb_n_buckets > 1)) - { - flow_hash_config1 = lb1->lb_hash_config; - hash_c1 = vnet_buffer (p1)->ip.flow_hash = - ip4_compute_flow_hash (ip1, flow_hash_config1); - } - if (PREDICT_FALSE (lb2->lb_n_buckets > 1)) - { - flow_hash_config2 = lb2->lb_hash_config; - hash_c2 = vnet_buffer (p2)->ip.flow_hash = - ip4_compute_flow_hash (ip2, flow_hash_config2); - } - if (PREDICT_FALSE (lb3->lb_n_buckets > 1)) - { - flow_hash_config3 = lb3->lb_hash_config; - hash_c3 = vnet_buffer (p3)->ip.flow_hash = - ip4_compute_flow_hash (ip3, flow_hash_config3); - } - - ASSERT (lb0->lb_n_buckets > 0); - ASSERT (is_pow2 (lb0->lb_n_buckets)); - ASSERT (lb1->lb_n_buckets > 0); - ASSERT (is_pow2 (lb1->lb_n_buckets)); - ASSERT (lb2->lb_n_buckets > 0); - ASSERT (is_pow2 (lb2->lb_n_buckets)); - ASSERT (lb3->lb_n_buckets > 0); - ASSERT (is_pow2 (lb3->lb_n_buckets)); - - dpo0 = load_balance_get_bucket_i (lb0, - (hash_c0 & - (lb0->lb_n_buckets_minus_1))); - dpo1 = load_balance_get_bucket_i (lb1, - (hash_c1 & - (lb1->lb_n_buckets_minus_1))); - dpo2 = load_balance_get_bucket_i (lb2, - (hash_c2 & - (lb2->lb_n_buckets_minus_1))); - dpo3 = load_balance_get_bucket_i (lb3, - (hash_c3 & - (lb3->lb_n_buckets_minus_1))); - - next0 = dpo0->dpoi_next_node; - vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; - next1 = dpo1->dpoi_next_node; - vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index; - next2 = dpo2->dpoi_next_node; - vnet_buffer (p2)->ip.adj_index[VLIB_TX] = dpo2->dpoi_index; - next3 = dpo3->dpoi_next_node; - vnet_buffer (p3)->ip.adj_index[VLIB_TX] = dpo3->dpoi_index; - - vlib_increment_combined_counter - (cm, cpu_index, lb_index0, 1, - vlib_buffer_length_in_chain (vm, p0) - + sizeof (ethernet_header_t)); - vlib_increment_combined_counter - (cm, cpu_index, lb_index1, 1, - vlib_buffer_length_in_chain (vm, p1) - + sizeof (ethernet_header_t)); - vlib_increment_combined_counter - (cm, cpu_index, lb_index2, 1, - vlib_buffer_length_in_chain (vm, p2) - + sizeof (ethernet_header_t)); - vlib_increment_combined_counter - (cm, cpu_index, lb_index3, 1, - vlib_buffer_length_in_chain (vm, p3) - + sizeof (ethernet_header_t)); - - vlib_validate_buffer_enqueue_x4 (vm, node, next, - to_next, n_left_to_next, - pi0, pi1, pi2, pi3, - next0, next1, next2, next3); - } - - while (n_left_from > 0 && n_left_to_next > 0) - { - vlib_buffer_t *p0; - ip4_header_t *ip0; - __attribute__ ((unused)) tcp_header_t *tcp0; - ip_lookup_next_t next0; - const load_balance_t *lb0; - ip4_fib_mtrie_t *mtrie0; - ip4_fib_mtrie_leaf_t leaf0; - ip4_address_t *dst_addr0; - __attribute__ ((unused)) u32 pi0, fib_index0, is_tcp_udp0, lbi0; - flow_hash_config_t flow_hash_config0; - const dpo_id_t *dpo0; - u32 hash_c0; - - 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]; - - if (!lookup_for_responses_to_locally_received_packets) - { - mtrie0 = &ip4_fib_get (fib_index0)->mtrie; - - leaf0 = IP4_FIB_MTRIE_LEAF_ROOT; - - leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, dst_addr0, 0); - } - - tcp0 = (void *) (ip0 + 1); - - is_tcp_udp0 = (ip0->protocol == IP_PROTOCOL_TCP - || ip0->protocol == IP_PROTOCOL_UDP); - - if (!lookup_for_responses_to_locally_received_packets) - leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, dst_addr0, 1); - - if (!lookup_for_responses_to_locally_received_packets) - leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, dst_addr0, 2); - - if (!lookup_for_responses_to_locally_received_packets) - leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, dst_addr0, 3); - - if (lookup_for_responses_to_locally_received_packets) - lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_RX]; - else - { - /* Handle default route. */ - leaf0 = - (leaf0 == - IP4_FIB_MTRIE_LEAF_EMPTY ? mtrie0->default_leaf : leaf0); - lbi0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0); - } - - lb0 = load_balance_get (lbi0); - - /* Use flow hash to compute multipath adjacency. */ - hash_c0 = vnet_buffer (p0)->ip.flow_hash = 0; - if (PREDICT_FALSE (lb0->lb_n_buckets > 1)) - { - flow_hash_config0 = lb0->lb_hash_config; - - hash_c0 = vnet_buffer (p0)->ip.flow_hash = - ip4_compute_flow_hash (ip0, flow_hash_config0); - } - - ASSERT (lb0->lb_n_buckets > 0); - ASSERT (is_pow2 (lb0->lb_n_buckets)); - - dpo0 = load_balance_get_bucket_i (lb0, - (hash_c0 & - (lb0->lb_n_buckets_minus_1))); - - next0 = dpo0->dpoi_next_node; - vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; - - vlib_increment_combined_counter - (cm, cpu_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) - ip4_forward_next_trace (vm, node, frame, VLIB_TX); - - return frame->n_vectors; -} - -/** @brief IPv4 lookup node. - @node ip4-lookup - - This is the main IPv4 lookup dispatch node. - - @param vm vlib_main_t corresponding to the current thread - @param node vlib_node_runtime_t - @param frame vlib_frame_t whose contents should be dispatched - - @par Graph mechanics: buffer metadata, next index usage - - @em Uses: - - <code>vnet_buffer(b)->sw_if_index[VLIB_RX]</code> - - Indicates the @c sw_if_index value of the interface that the - packet was received on. - - <code>vnet_buffer(b)->sw_if_index[VLIB_TX]</code> - - When the value is @c ~0 then the node performs a longest prefix - match (LPM) for the packet destination address in the FIB attached - to the receive interface. - - Otherwise perform LPM for the packet destination address in the - indicated FIB. In this case <code>[VLIB_TX]</code> is a FIB index - value (0, 1, ...) and not a VRF id. - - @em Sets: - - <code>vnet_buffer(b)->ip.adj_index[VLIB_TX]</code> - - The lookup result adjacency index. - - <em>Next Index:</em> - - Dispatches the packet to the node index found in - ip_adjacency_t @c adj->lookup_next_index - (where @c adj is the lookup result adjacency). -*/ -static uword -ip4_lookup (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - return ip4_lookup_inline (vm, node, frame, - /* lookup_for_responses_to_locally_received_packets */ - 0); - -} - -static u8 *format_ip4_lookup_trace (u8 * s, va_list * args); - -VLIB_REGISTER_NODE (ip4_lookup_node) = -{ -.function = ip4_lookup,.name = "ip4-lookup",.vector_size = - sizeof (u32),.format_trace = format_ip4_lookup_trace,.n_next_nodes = - IP_LOOKUP_N_NEXT,.next_nodes = IP4_LOOKUP_NEXT_NODES,}; - -VLIB_NODE_FUNCTION_MULTIARCH (ip4_lookup_node, ip4_lookup); - -always_inline uword -ip4_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 cpu_index = os_get_cpu_number (); - - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; - next = node->cached_next_index; - - if (node->flags & VLIB_NODE_FLAG_TRACE) - ip4_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 ip4_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 = vnet_buffer (p0)->ip.flow_hash = 0; - hc1 = vnet_buffer (p1)->ip.flow_hash = 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 = - ip4_compute_flow_hash (ip0, hc0); - } - } - 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 = - ip4_compute_flow_hash (ip1, hc1); - } - } - - dpo0 = - load_balance_get_bucket_i (lb0, - hc0 & (lb0->lb_n_buckets_minus_1)); - dpo1 = - load_balance_get_bucket_i (lb1, - hc1 & (lb1->lb_n_buckets_minus_1)); - - next0 = dpo0->dpoi_next_node; - next1 = dpo1->dpoi_next_node; - - 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, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0)); - vlib_increment_combined_counter - (cm, cpu_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 ip4_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 = vnet_buffer (p0)->ip.flow_hash = 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 = - ip4_compute_flow_hash (ip0, hc0); - } - } - - dpo0 = - load_balance_get_bucket_i (lb0, - hc0 & (lb0->lb_n_buckets_minus_1)); - - next0 = dpo0->dpoi_next_node; - vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; - - vlib_increment_combined_counter - (cm, cpu_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; -} - -VLIB_REGISTER_NODE (ip4_load_balance_node) = -{ -.function = ip4_load_balance,.name = "ip4-load-balance",.vector_size = - sizeof (u32),.sibling_of = "ip4-lookup",.format_trace = - format_ip4_lookup_trace,}; - -VLIB_NODE_FUNCTION_MULTIARCH (ip4_load_balance_node, ip4_load_balance); - -/* get first interface address */ -ip4_address_t * -ip4_interface_first_address (ip4_main_t * im, u32 sw_if_index, - ip_interface_address_t ** result_ia) -{ - ip_lookup_main_t *lm = &im->lookup_main; - ip_interface_address_t *ia = 0; - ip4_address_t *result = 0; - - foreach_ip_interface_address (lm, ia, sw_if_index, - 1 /* honor unnumbered */ , - ( - { - ip4_address_t * a = - ip_interface_address_get_address (lm, ia); - result = a; - break; - } - )); - if (result_ia) - *result_ia = result ? ia : 0; - return result; -} - -static void -ip4_add_interface_routes (u32 sw_if_index, - ip4_main_t * im, u32 fib_index, - ip_interface_address_t * a) -{ - ip_lookup_main_t *lm = &im->lookup_main; - ip4_address_t *address = ip_interface_address_get_address (lm, a); - fib_prefix_t pfx = { - .fp_len = a->address_length, - .fp_proto = FIB_PROTOCOL_IP4, - .fp_addr.ip4 = *address, - }; - - a->neighbor_probe_adj_index = ~0; - - if (pfx.fp_len < 32) - { - fib_node_index_t fei; - - fei = fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_INTERFACE, (FIB_ENTRY_FLAG_CONNECTED | FIB_ENTRY_FLAG_ATTACHED), FIB_PROTOCOL_IP4, NULL, /* No next-hop address */ - sw_if_index, ~0, // invalid FIB index - 1, NULL, // no out-label stack - FIB_ROUTE_PATH_FLAG_NONE); - a->neighbor_probe_adj_index = fib_entry_get_adj (fei); - } - - pfx.fp_len = 32; - - 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_IP4, - classify_dpo_create (DPO_PROTO_IP4, classify_table_index)); - - fib_table_entry_special_dpo_add (fib_index, - &pfx, - FIB_SOURCE_CLASSIFY, - FIB_ENTRY_FLAG_NONE, &dpo); - dpo_reset (&dpo); - } - } - - fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_INTERFACE, (FIB_ENTRY_FLAG_CONNECTED | FIB_ENTRY_FLAG_LOCAL), FIB_PROTOCOL_IP4, &pfx.fp_addr, sw_if_index, ~0, // invalid FIB index - 1, NULL, // no out-label stack - FIB_ROUTE_PATH_FLAG_NONE); -} - -static void -ip4_del_interface_routes (ip4_main_t * im, - u32 fib_index, - ip4_address_t * address, u32 address_length) -{ - fib_prefix_t pfx = { - .fp_len = address_length, - .fp_proto = FIB_PROTOCOL_IP4, - .fp_addr.ip4 = *address, - }; - - if (pfx.fp_len < 32) - { - fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE); - } - - pfx.fp_len = 32; - fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE); -} - -void -ip4_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable) -{ - ip4_main_t *im = &ip4_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 - { - ASSERT (im->ip_enabled_by_sw_if_index[sw_if_index] > 0); - if (0 != --im->ip_enabled_by_sw_if_index[sw_if_index]) - return; - } - vnet_feature_enable_disable ("ip4-unicast", "ip4-drop", sw_if_index, - !is_enable, 0, 0); - - vnet_feature_enable_disable ("ip4-multicast", "ip4-drop", sw_if_index, - !is_enable, 0, 0); - -} - -static clib_error_t * -ip4_add_del_interface_address_internal (vlib_main_t * vm, - u32 sw_if_index, - ip4_address_t * address, - u32 address_length, u32 is_del) -{ - vnet_main_t *vnm = vnet_get_main (); - ip4_main_t *im = &ip4_main; - ip_lookup_main_t *lm = &im->lookup_main; - clib_error_t *error = 0; - u32 if_address_index, elts_before; - ip4_address_fib_t ip4_af, *addr_fib = 0; - - vec_validate (im->fib_index_by_sw_if_index, sw_if_index); - ip4_addr_fib_init (&ip4_af, address, - vec_elt (im->fib_index_by_sw_if_index, sw_if_index)); - vec_add1 (addr_fib, ip4_af); - - /* FIXME-LATER - * there is no support for adj-fib handling in the presence of overlapping - * subnets on interfaces. Easy fix - disallow overlapping subnets, like - * most routers do. - */ - if (!is_del) - { - /* When adding an address check that it does not conflict - with an existing address. */ - ip_interface_address_t *ia; - foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index, - 0 /* honor unnumbered */ , - ( - { - ip4_address_t * x = - ip_interface_address_get_address - (&im->lookup_main, ia); - if (ip4_destination_matches_route - (im, address, x, ia->address_length) - || - ip4_destination_matches_route (im, - x, - address, - address_length)) - return - clib_error_create - ("failed to add %U which conflicts with %U for interface %U", - format_ip4_address_and_length, address, - address_length, - format_ip4_address_and_length, x, - ia->address_length, - format_vnet_sw_if_index_name, vnm, - sw_if_index);} - )); - } - - 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; - - ip4_sw_interface_enable_disable (sw_if_index, !is_del); - - if (is_del) - ip4_del_interface_routes (im, ip4_af.fib_index, address, address_length); - else - ip4_add_interface_routes (sw_if_index, - im, ip4_af.fib_index, - pool_elt_at_index - (lm->if_address_pool, if_address_index)); - - /* If pool did not grow/shrink: add duplicate address. */ - if (elts_before != pool_elts (lm->if_address_pool)) - { - ip4_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 * -ip4_add_del_interface_address (vlib_main_t * vm, u32 sw_if_index, - ip4_address_t * address, u32 address_length, - u32 is_del) -{ - return ip4_add_del_interface_address_internal - (vm, sw_if_index, address, address_length, is_del); -} - -/* Built-in ip4 unicast rx feature path definition */ -/* *INDENT-OFF* */ -VNET_FEATURE_ARC_INIT (ip4_unicast, static) = -{ - .arc_name = "ip4-unicast", - .start_nodes = VNET_FEATURES ("ip4-input", "ip4-input-no-checksum"), - .end_node = "ip4-lookup", - .arc_index_ptr = &ip4_main.lookup_main.ucast_feature_arc_index, -}; - -VNET_FEATURE_INIT (ip4_flow_classify, static) = -{ - .arc_name = "ip4-unicast", - .node_name = "ip4-flow-classify", - .runs_before = VNET_FEATURES ("ip4-inacl"), -}; - -VNET_FEATURE_INIT (ip4_inacl, static) = -{ - .arc_name = "ip4-unicast", - .node_name = "ip4-inacl", - .runs_before = VNET_FEATURES ("ip4-source-check-via-rx"), -}; - -VNET_FEATURE_INIT (ip4_source_check_1, static) = -{ - .arc_name = "ip4-unicast", - .node_name = "ip4-source-check-via-rx", - .runs_before = VNET_FEATURES ("ip4-source-check-via-any"), -}; - -VNET_FEATURE_INIT (ip4_source_check_2, static) = -{ - .arc_name = "ip4-unicast", - .node_name = "ip4-source-check-via-any", - .runs_before = VNET_FEATURES ("ip4-policer-classify"), -}; - -VNET_FEATURE_INIT (ip4_source_and_port_range_check_rx, static) = -{ - .arc_name = "ip4-unicast", - .node_name = "ip4-source-and-port-range-check-rx", - .runs_before = VNET_FEATURES ("ip4-policer-classify"), -}; - -VNET_FEATURE_INIT (ip4_policer_classify, static) = -{ - .arc_name = "ip4-unicast", - .node_name = "ip4-policer-classify", - .runs_before = VNET_FEATURES ("ipsec-input-ip4"), -}; - -VNET_FEATURE_INIT (ip4_ipsec, static) = -{ - .arc_name = "ip4-unicast", - .node_name = "ipsec-input-ip4", - .runs_before = VNET_FEATURES ("vpath-input-ip4"), -}; - -VNET_FEATURE_INIT (ip4_vpath, static) = -{ - .arc_name = "ip4-unicast", - .node_name = "vpath-input-ip4", - .runs_before = VNET_FEATURES ("ip4-vxlan-bypass"), -}; - -VNET_FEATURE_INIT (ip4_vxlan_bypass, static) = -{ - .arc_name = "ip4-unicast", - .node_name = "ip4-vxlan-bypass", - .runs_before = VNET_FEATURES ("ip4-lookup"), -}; - -VNET_FEATURE_INIT (ip4_lookup, static) = -{ - .arc_name = "ip4-unicast", - .node_name = "ip4-lookup", - .runs_before = VNET_FEATURES ("ip4-drop"), -}; - -VNET_FEATURE_INIT (ip4_drop, static) = -{ - .arc_name = "ip4-unicast", - .node_name = "ip4-drop", - .runs_before = 0, /* not before any other features */ -}; - - -/* Built-in ip4 multicast rx feature path definition */ -VNET_FEATURE_ARC_INIT (ip4_multicast, static) = -{ - .arc_name = "ip4-multicast", - .start_nodes = VNET_FEATURES ("ip4-input", "ip4-input-no-checksum"), - .end_node = "ip4-lookup-multicast", - .arc_index_ptr = &ip4_main.lookup_main.mcast_feature_arc_index, -}; - -VNET_FEATURE_INIT (ip4_vpath_mc, static) = -{ - .arc_name = "ip4-multicast", - .node_name = "vpath-input-ip4", - .runs_before = VNET_FEATURES ("ip4-lookup-multicast"), -}; - -VNET_FEATURE_INIT (ip4_lookup_mc, static) = -{ - .arc_name = "ip4-multicast", - .node_name = "ip4-lookup-multicast", - .runs_before = VNET_FEATURES ("ip4-drop"), -}; - -VNET_FEATURE_INIT (ip4_mc_drop, static) = -{ - .arc_name = "ip4-multicast", - .node_name = "ip4-drop", - .runs_before = 0, /* last feature */ -}; - -/* Source and port-range check ip4 tx feature path definition */ -VNET_FEATURE_ARC_INIT (ip4_output, static) = -{ - .arc_name = "ip4-output", - .start_nodes = VNET_FEATURES ("ip4-rewrite", "ip4-midchain"), - .end_node = "interface-output", - .arc_index_ptr = &ip4_main.lookup_main.output_feature_arc_index, -}; - -VNET_FEATURE_INIT (ip4_source_and_port_range_check_tx, static) = -{ - .arc_name = "ip4-output", - .node_name = "ip4-source-and-port-range-check-tx", - .runs_before = VNET_FEATURES ("ipsec-output-ip4"), -}; - -VNET_FEATURE_INIT (ip4_ipsec_output, static) = -{ - .arc_name = "ip4-output", - .node_name = "ipsec-output-ip4", - .runs_before = VNET_FEATURES ("interface-output"), -}; - -/* Built-in ip4 tx feature path definition */ -VNET_FEATURE_INIT (ip4_interface_output, static) = -{ - .arc_name = "ip4-output", - .node_name = "interface-output", - .runs_before = 0, /* not before any other features */ -}; -/* *INDENT-ON* */ - -static clib_error_t * -ip4_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add) -{ - ip4_main_t *im = &ip4_main; - - /* Fill in lookup tables with default table (0). */ - vec_validate (im->fib_index_by_sw_if_index, sw_if_index); - - vnet_feature_enable_disable ("ip4-unicast", "ip4-drop", sw_if_index, - is_add, 0, 0); - - vnet_feature_enable_disable ("ip4-multicast", "ip4-drop", sw_if_index, - is_add, 0, 0); - - return /* no error */ 0; -} - -VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip4_sw_interface_add_del); - -/* Global IP4 main. */ -ip4_main_t ip4_main; - -clib_error_t * -ip4_lookup_init (vlib_main_t * vm) -{ - ip4_main_t *im = &ip4_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 m; - - if (i < 32) - m = pow2_mask (i) << (32 - i); - else - m = ~0; - im->fib_masks[i] = clib_host_to_net_u32 (m); - } - - ip_lookup_init (&im->lookup_main, /* is_ip6 */ 0); - - /* Create FIB with index 0 and table id of 0. */ - fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, 0); - - { - pg_node_t *pn; - pn = pg_get_node (ip4_lookup_node.index); - pn->unformat_edit = unformat_pg_ip4_header; - } - - { - ethernet_arp_header_t h; - - memset (&h, 0, sizeof (h)); - - /* Set target ethernet address to all zeros. */ - memset (h.ip4_over_ethernet[1].ethernet, 0, - sizeof (h.ip4_over_ethernet[1].ethernet)); - -#define _16(f,v) h.f = clib_host_to_net_u16 (v); -#define _8(f,v) h.f = v; - _16 (l2_type, ETHERNET_ARP_HARDWARE_TYPE_ethernet); - _16 (l3_type, ETHERNET_TYPE_IP4); - _8 (n_l2_address_bytes, 6); - _8 (n_l3_address_bytes, 4); - _16 (opcode, ETHERNET_ARP_OPCODE_request); -#undef _16 -#undef _8 - - vlib_packet_template_init (vm, &im->ip4_arp_request_packet_template, - /* data */ &h, - sizeof (h), - /* alloc chunk size */ 8, - "ip4 arp"); - } - - return error; -} - -VLIB_INIT_FUNCTION (ip4_lookup_init); - -typedef struct -{ - /* Adjacency taken. */ - u32 dpo_index; - u32 flow_hash; - u32 fib_index; - - /* Packet data, possibly *after* rewrite. */ - u8 packet_data[64 - 1 * sizeof (u32)]; -} -ip4_forward_next_trace_t; - -u8 * -format_ip4_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 *); - ip4_forward_next_trace_t *t = va_arg (*args, ip4_forward_next_trace_t *); - uword indent = format_get_indent (s); - s = format (s, "%U%U", - format_white_space, indent, - format_ip4_header, t->packet_data, sizeof (t->packet_data)); - return s; -} - -static u8 * -format_ip4_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 *); - ip4_forward_next_trace_t *t = va_arg (*args, ip4_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->dpo_index, t->flow_hash); - s = format (s, "\n%U%U", - format_white_space, indent, - format_ip4_header, t->packet_data, sizeof (t->packet_data)); - return s; -} - -static u8 * -format_ip4_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 *); - ip4_forward_next_trace_t *t = va_arg (*args, ip4_forward_next_trace_t *); - vnet_main_t *vnm = vnet_get_main (); - uword indent = format_get_indent (s); - - s = format (s, "tx_sw_if_index %d dpo-idx %d : %U flow hash: 0x%08x", - t->fib_index, t->dpo_index, format_ip_adjacency, - t->dpo_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash); - s = format (s, "\n%U%U", - format_white_space, indent, - format_ip_adjacency_packet_data, - vnm, t->dpo_index, t->packet_data, sizeof (t->packet_data)); - return s; -} - -/* Common trace function for all ip4-forward next nodes. */ -void -ip4_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; - ip4_main_t *im = &ip4_main; - - n_left = frame->n_vectors; - from = vlib_frame_vector_args (frame); - - while (n_left >= 4) - { - u32 bi0, bi1; - vlib_buffer_t *b0, *b1; - ip4_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->dpo_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->dpo_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; - ip4_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->dpo_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 -ip4_drop_or_punt (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, ip4_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, - ip4_input_node.index, error_code); - - if (node->flags & VLIB_NODE_FLAG_TRACE) - ip4_forward_next_trace (vm, node, frame, VLIB_TX); - - return n_packets; -} - -static uword -ip4_drop (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - return ip4_drop_or_punt (vm, node, frame, IP4_ERROR_ADJACENCY_DROP); -} - -static uword -ip4_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - return ip4_drop_or_punt (vm, node, frame, IP4_ERROR_ADJACENCY_PUNT); -} - -VLIB_REGISTER_NODE (ip4_drop_node, static) = -{ - .function = ip4_drop,.name = "ip4-drop",.vector_size = - sizeof (u32),.format_trace = format_ip4_forward_next_trace,.n_next_nodes = - 1,.next_nodes = - { - [0] = "error-drop",} -,}; - -VLIB_NODE_FUNCTION_MULTIARCH (ip4_drop_node, ip4_drop); - -VLIB_REGISTER_NODE (ip4_punt_node, static) = -{ - .function = ip4_punt,.name = "ip4-punt",.vector_size = - sizeof (u32),.format_trace = format_ip4_forward_next_trace,.n_next_nodes = - 1,.next_nodes = - { - [0] = "error-punt",} -,}; - -VLIB_NODE_FUNCTION_MULTIARCH (ip4_punt_node, ip4_punt); - -/* Compute TCP/UDP/ICMP4 checksum in software. */ -u16 -ip4_tcp_udp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, - ip4_header_t * ip0) -{ - ip_csum_t sum0; - u32 ip_header_length, payload_length_host_byte_order; - u32 n_this_buffer, n_bytes_left; - u16 sum16; - void *data_this_buffer; - - /* Initialize checksum with ip header. */ - ip_header_length = ip4_header_bytes (ip0); - payload_length_host_byte_order = - clib_net_to_host_u16 (ip0->length) - ip_header_length; - sum0 = - clib_host_to_net_u32 (payload_length_host_byte_order + - (ip0->protocol << 16)); - - if (BITS (uword) == 32) - { - sum0 = - ip_csum_with_carry (sum0, - clib_mem_unaligned (&ip0->src_address, u32)); - sum0 = - ip_csum_with_carry (sum0, - clib_mem_unaligned (&ip0->dst_address, u32)); - } - else - sum0 = - ip_csum_with_carry (sum0, clib_mem_unaligned (&ip0->src_address, u64)); - - n_bytes_left = n_this_buffer = payload_length_host_byte_order; - data_this_buffer = (void *) ip0 + ip_header_length; - if (n_this_buffer + ip_header_length > p0->current_length) - n_this_buffer = - p0->current_length > - ip_header_length ? p0->current_length - ip_header_length : 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; - - ASSERT (p0->flags & VLIB_BUFFER_NEXT_PRESENT); - 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 -ip4_tcp_udp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0) -{ - ip4_header_t *ip0 = vlib_buffer_get_current (p0); - udp_header_t *udp0; - u16 sum16; - - ASSERT (ip0->protocol == IP_PROTOCOL_TCP - || ip0->protocol == IP_PROTOCOL_UDP); - - udp0 = (void *) (ip0 + 1); - if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0) - { - p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED - | IP_BUFFER_L4_CHECKSUM_CORRECT); - return p0->flags; - } - - sum16 = ip4_tcp_udp_compute_checksum (vm, p0, ip0); - - p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED - | ((sum16 == 0) << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT)); - - return p0->flags; -} - -static uword -ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - ip4_main_t *im = &ip4_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, ip4_input_node.index); - - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; - next_index = node->cached_next_index; - - if (node->flags & VLIB_NODE_FLAG_TRACE) - ip4_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; - ip4_header_t *ip0, *ip1; - udp_header_t *udp0, *udp1; - ip4_fib_mtrie_t *mtrie0, *mtrie1; - ip4_fib_mtrie_leaf_t leaf0, leaf1; - const dpo_id_t *dpo0, *dpo1; - const load_balance_t *lb0, *lb1; - u32 pi0, ip_len0, udp_len0, flags0, next0, fib_index0, lbi0; - u32 pi1, ip_len1, udp_len1, flags1, next1, fib_index1, lbi1; - i32 len_diff0, len_diff1; - u8 error0, is_udp0, is_tcp_udp0, good_tcp_udp0, proto0; - u8 error1, is_udp1, is_tcp_udp1, good_tcp_udp1, proto1; - u8 enqueue_code; - - pi0 = to_next[0] = from[0]; - pi1 = to_next[1] = from[1]; - from += 2; - n_left_from -= 2; - to_next += 2; - n_left_to_next -= 2; - - p0 = vlib_get_buffer (vm, pi0); - p1 = vlib_get_buffer (vm, pi1); - - ip0 = vlib_buffer_get_current (p0); - ip1 = vlib_buffer_get_current (p1); - - vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data; - vnet_buffer (p1)->ip.start_of_ip_header = p1->current_data; - - 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]; - - fib_index1 = vec_elt (im->fib_index_by_sw_if_index, - vnet_buffer (p1)->sw_if_index[VLIB_RX]); - fib_index1 = (vnet_buffer (p1)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? - fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX]; - - mtrie0 = &ip4_fib_get (fib_index0)->mtrie; - mtrie1 = &ip4_fib_get (fib_index1)->mtrie; - - leaf0 = leaf1 = IP4_FIB_MTRIE_LEAF_ROOT; - - leaf0 = - ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 0); - leaf1 = - ip4_fib_mtrie_lookup_step (mtrie1, leaf1, &ip1->src_address, 0); - - /* Treat IP frag packets as "experimental" protocol for now - until support of IP frag reassembly is implemented */ - proto0 = ip4_is_fragment (ip0) ? 0xfe : ip0->protocol; - proto1 = ip4_is_fragment (ip1) ? 0xfe : ip1->protocol; - is_udp0 = proto0 == IP_PROTOCOL_UDP; - is_udp1 = proto1 == IP_PROTOCOL_UDP; - is_tcp_udp0 = is_udp0 || proto0 == IP_PROTOCOL_TCP; - is_tcp_udp1 = is_udp1 || proto1 == IP_PROTOCOL_TCP; - - flags0 = p0->flags; - flags1 = p1->flags; - - good_tcp_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; - good_tcp_udp1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; - - udp0 = ip4_next_header (ip0); - udp1 = ip4_next_header (ip1); - - /* Don't verify UDP checksum for packets with explicit zero checksum. */ - good_tcp_udp0 |= is_udp0 && udp0->checksum == 0; - good_tcp_udp1 |= is_udp1 && udp1->checksum == 0; - - leaf0 = - ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 1); - leaf1 = - ip4_fib_mtrie_lookup_step (mtrie1, leaf1, &ip1->src_address, 1); - - /* Verify UDP length. */ - ip_len0 = clib_net_to_host_u16 (ip0->length); - ip_len1 = clib_net_to_host_u16 (ip1->length); - udp_len0 = clib_net_to_host_u16 (udp0->length); - udp_len1 = clib_net_to_host_u16 (udp1->length); - - len_diff0 = ip_len0 - udp_len0; - len_diff1 = ip_len1 - udp_len1; - - len_diff0 = is_udp0 ? len_diff0 : 0; - len_diff1 = is_udp1 ? len_diff1 : 0; - - if (PREDICT_FALSE (!(is_tcp_udp0 & is_tcp_udp1 - & good_tcp_udp0 & good_tcp_udp1))) - { - if (is_tcp_udp0) - { - if (is_tcp_udp0 - && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)) - flags0 = ip4_tcp_udp_validate_checksum (vm, p0); - good_tcp_udp0 = - (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; - good_tcp_udp0 |= is_udp0 && udp0->checksum == 0; - } - if (is_tcp_udp1) - { - if (is_tcp_udp1 - && !(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED)) - flags1 = ip4_tcp_udp_validate_checksum (vm, p1); - good_tcp_udp1 = - (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; - good_tcp_udp1 |= is_udp1 && udp1->checksum == 0; - } - } - - good_tcp_udp0 &= len_diff0 >= 0; - good_tcp_udp1 &= len_diff1 >= 0; - - leaf0 = - ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 2); - leaf1 = - ip4_fib_mtrie_lookup_step (mtrie1, leaf1, &ip1->src_address, 2); - - error0 = error1 = IP4_ERROR_UNKNOWN_PROTOCOL; - - error0 = len_diff0 < 0 ? IP4_ERROR_UDP_LENGTH : error0; - error1 = len_diff1 < 0 ? IP4_ERROR_UDP_LENGTH : error1; - - ASSERT (IP4_ERROR_TCP_CHECKSUM + 1 == IP4_ERROR_UDP_CHECKSUM); - error0 = (is_tcp_udp0 && !good_tcp_udp0 - ? IP4_ERROR_TCP_CHECKSUM + is_udp0 : error0); - error1 = (is_tcp_udp1 && !good_tcp_udp1 - ? IP4_ERROR_TCP_CHECKSUM + is_udp1 : error1); - - leaf0 = - ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 3); - leaf1 = - ip4_fib_mtrie_lookup_step (mtrie1, leaf1, &ip1->src_address, 3); - leaf0 = - (leaf0 == - IP4_FIB_MTRIE_LEAF_EMPTY ? mtrie0->default_leaf : leaf0); - leaf1 = - (leaf1 == - IP4_FIB_MTRIE_LEAF_EMPTY ? mtrie1->default_leaf : leaf1); - - vnet_buffer (p0)->ip.adj_index[VLIB_RX] = lbi0 = - ip4_fib_mtrie_leaf_get_adj_index (leaf0); - vnet_buffer (p0)->ip.adj_index[VLIB_TX] = lbi0; - - vnet_buffer (p1)->ip.adj_index[VLIB_RX] = lbi1 = - ip4_fib_mtrie_leaf_get_adj_index (leaf1); - vnet_buffer (p1)->ip.adj_index[VLIB_TX] = lbi1; - - lb0 = load_balance_get (lbi0); - lb1 = load_balance_get (lbi1); - dpo0 = load_balance_get_bucket_i (lb0, 0); - dpo1 = load_balance_get_bucket_i (lb1, 0); - - /* - * Must have a route to source otherwise we drop the packet. - * ip4 broadcasts are accepted, e.g. to make dhcp client work - * - * The checks are: - * - the source is a recieve => it's from us => bogus, do this - * first since it sets a different error code. - * - uRPF check for any route to source - accept if passes. - * - allow packets destined to the broadcast address from unknown sources - */ - error0 = ((error0 == IP4_ERROR_UNKNOWN_PROTOCOL && - dpo0->dpoi_type == DPO_RECEIVE) ? - IP4_ERROR_SPOOFED_LOCAL_PACKETS : error0); - error0 = ((error0 == IP4_ERROR_UNKNOWN_PROTOCOL && - !fib_urpf_check_size (lb0->lb_urpf) && - ip0->dst_address.as_u32 != 0xFFFFFFFF) - ? IP4_ERROR_SRC_LOOKUP_MISS : error0); - error1 = ((error1 == IP4_ERROR_UNKNOWN_PROTOCOL && - dpo1->dpoi_type == DPO_RECEIVE) ? - IP4_ERROR_SPOOFED_LOCAL_PACKETS : error1); - error1 = ((error1 == IP4_ERROR_UNKNOWN_PROTOCOL && - !fib_urpf_check_size (lb1->lb_urpf) && - ip1->dst_address.as_u32 != 0xFFFFFFFF) - ? IP4_ERROR_SRC_LOOKUP_MISS : error1); - - next0 = lm->local_next_by_ip_protocol[proto0]; - next1 = lm->local_next_by_ip_protocol[proto1]; - - next0 = - error0 != IP4_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0; - next1 = - error1 != IP4_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1; - - p0->error = error0 ? error_node->errors[error0] : 0; - p1->error = error1 ? error_node->errors[error1] : 0; - - enqueue_code = (next0 != next_index) + 2 * (next1 != next_index); - - if (PREDICT_FALSE (enqueue_code != 0)) - { - switch (enqueue_code) - { - 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 B or 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) - { - vlib_put_next_frame (vm, node, next_index, - n_left_to_next); - next_index = next1; - vlib_get_next_frame (vm, node, next_index, to_next, - n_left_to_next); - } - break; - } - } - } - - while (n_left_from > 0 && n_left_to_next > 0) - { - vlib_buffer_t *p0; - ip4_header_t *ip0; - udp_header_t *udp0; - ip4_fib_mtrie_t *mtrie0; - ip4_fib_mtrie_leaf_t leaf0; - u32 pi0, next0, ip_len0, udp_len0, flags0, fib_index0, lbi0; - i32 len_diff0; - u8 error0, is_udp0, is_tcp_udp0, good_tcp_udp0, proto0; - load_balance_t *lb0; - const dpo_id_t *dpo0; - - pi0 = to_next[0] = from[0]; - from += 1; - n_left_from -= 1; - to_next += 1; - n_left_to_next -= 1; - - p0 = vlib_get_buffer (vm, pi0); - - ip0 = vlib_buffer_get_current (p0); - - vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data; - - 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]; - - mtrie0 = &ip4_fib_get (fib_index0)->mtrie; - - leaf0 = IP4_FIB_MTRIE_LEAF_ROOT; - - leaf0 = - ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 0); - - /* Treat IP frag packets as "experimental" protocol for now - until support of IP frag reassembly is implemented */ - proto0 = ip4_is_fragment (ip0) ? 0xfe : ip0->protocol; - is_udp0 = proto0 == IP_PROTOCOL_UDP; - is_tcp_udp0 = is_udp0 || proto0 == IP_PROTOCOL_TCP; - - flags0 = p0->flags; - - good_tcp_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; - - udp0 = ip4_next_header (ip0); - - /* Don't verify UDP checksum for packets with explicit zero checksum. */ - good_tcp_udp0 |= is_udp0 && udp0->checksum == 0; - - leaf0 = - ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 1); - - /* Verify UDP length. */ - ip_len0 = clib_net_to_host_u16 (ip0->length); - udp_len0 = clib_net_to_host_u16 (udp0->length); - - len_diff0 = ip_len0 - udp_len0; - - len_diff0 = is_udp0 ? len_diff0 : 0; - - if (PREDICT_FALSE (!(is_tcp_udp0 & good_tcp_udp0))) - { - if (is_tcp_udp0) - { - if (is_tcp_udp0 - && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)) - flags0 = ip4_tcp_udp_validate_checksum (vm, p0); - good_tcp_udp0 = - (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; - good_tcp_udp0 |= is_udp0 && udp0->checksum == 0; - } - } - - good_tcp_udp0 &= len_diff0 >= 0; - - leaf0 = - ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 2); - - error0 = IP4_ERROR_UNKNOWN_PROTOCOL; - - error0 = len_diff0 < 0 ? IP4_ERROR_UDP_LENGTH : error0; - - ASSERT (IP4_ERROR_TCP_CHECKSUM + 1 == IP4_ERROR_UDP_CHECKSUM); - error0 = (is_tcp_udp0 && !good_tcp_udp0 - ? IP4_ERROR_TCP_CHECKSUM + is_udp0 : error0); - - leaf0 = - ip4_fib_mtrie_lookup_step (mtrie0, leaf0, &ip0->src_address, 3); - leaf0 = - (leaf0 == - IP4_FIB_MTRIE_LEAF_EMPTY ? mtrie0->default_leaf : leaf0); - - lbi0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0); - vnet_buffer (p0)->ip.adj_index[VLIB_TX] = lbi0; - - lb0 = load_balance_get (lbi0); - dpo0 = load_balance_get_bucket_i (lb0, 0); - - vnet_buffer (p0)->ip.adj_index[VLIB_TX] = - vnet_buffer (p0)->ip.adj_index[VLIB_RX] = lbi0; - - error0 = ((error0 == IP4_ERROR_UNKNOWN_PROTOCOL && - dpo0->dpoi_type == DPO_RECEIVE) ? - IP4_ERROR_SPOOFED_LOCAL_PACKETS : error0); - error0 = ((error0 == IP4_ERROR_UNKNOWN_PROTOCOL && - !fib_urpf_check_size (lb0->lb_urpf) && - ip0->dst_address.as_u32 != 0xFFFFFFFF) - ? IP4_ERROR_SRC_LOOKUP_MISS : error0); - - next0 = lm->local_next_by_ip_protocol[proto0]; - - next0 = - error0 != IP4_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0; - - p0->error = error0 ? error_node->errors[error0] : 0; - - if (PREDICT_FALSE (next0 != next_index)) - { - n_left_to_next += 1; - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - - next_index = next0; - vlib_get_next_frame (vm, node, next_index, 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_index, n_left_to_next); - } - - return frame->n_vectors; -} - -VLIB_REGISTER_NODE (ip4_local_node, static) = -{ - .function = ip4_local,.name = "ip4-local",.vector_size = - sizeof (u32),.format_trace = format_ip4_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] = "ip4-udp-lookup", - [IP_LOCAL_NEXT_ICMP] = "ip4-icmp-input",} -,}; - -VLIB_NODE_FUNCTION_MULTIARCH (ip4_local_node, ip4_local); - -void -ip4_register_protocol (u32 protocol, u32 node_index) -{ - vlib_main_t *vm = vlib_get_main (); - ip4_main_t *im = &ip4_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, ip4_local_node.index, node_index); -} - -static clib_error_t * -show_ip_local_command_fn (vlib_main_t * vm, - unformat_input_t * input, vlib_cli_command_t * cmd) -{ - ip4_main_t *im = &ip4_main; - ip_lookup_main_t *lm = &im->lookup_main; - int i; - - vlib_cli_output (vm, "Protocols handled by ip4_local"); - for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++) - { - if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT) - vlib_cli_output (vm, "%d", i); - } - return 0; -} - - - -/*? - * Display the set of protocols handled by the local IPv4 stack. - * - * @cliexpar - * Example of how to display local protocol table: - * @cliexstart{show ip local} - * Protocols handled by ip4_local - * 1 - * 17 - * 47 - * @cliexend -?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (show_ip_local, static) = -{ - .path = "show ip local", - .function = show_ip_local_command_fn, - .short_help = "show ip local", -}; -/* *INDENT-ON* */ - -always_inline uword -ip4_arp_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, int is_glean) -{ - vnet_main_t *vnm = vnet_get_main (); - ip4_main_t *im = &ip4_main; - ip_lookup_main_t *lm = &im->lookup_main; - u32 *from, *to_next_drop; - uword n_left_from, n_left_to_next_drop, next_index; - static f64 time_last_seed_change = -1e100; - static u32 hash_seeds[3]; - static uword hash_bitmap[256 / BITS (uword)]; - f64 time_now; - - if (node->flags & VLIB_NODE_FLAG_TRACE) - ip4_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 no-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; - next_index = node->cached_next_index; - if (next_index == IP4_ARP_NEXT_DROP) - next_index = IP4_ARP_N_NEXT; /* point to first interface */ - - while (n_left_from > 0) - { - vlib_get_next_frame (vm, node, IP4_ARP_NEXT_DROP, - to_next_drop, n_left_to_next_drop); - - while (n_left_from > 0 && n_left_to_next_drop > 0) - { - u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0; - ip_adjacency_t *adj0; - vlib_buffer_t *p0; - ip4_header_t *ip0; - uword bm0; - - pi0 = from[0]; - - p0 = vlib_get_buffer (vm, pi0); - - adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; - adj0 = ip_get_adjacency (lm, adj_index0); - ip0 = vlib_buffer_get_current (p0); - - 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; - - if (is_glean) - { - /* - * this is the Glean case, so we are ARPing for the - * packet's destination - */ - a0 ^= ip0->dst_address.data_u32; - } - else - { - a0 ^= adj0->sub_type.nbr.next_hop.ip4.data_u32; - } - b0 ^= sw_if_index0; - - 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; - - p0->error = - node->errors[drop0 ? IP4_ARP_ERROR_DROP : - IP4_ARP_ERROR_REQUEST_SENT]; - - /* - * 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; - - if (drop0) - continue; - - /* - * Can happen if the control-plane is programming tables - * with traffic flowing; at least that's today's lame excuse. - */ - if ((is_glean && adj0->lookup_next_index != IP_LOOKUP_NEXT_GLEAN) || - (!is_glean && adj0->lookup_next_index != IP_LOOKUP_NEXT_ARP)) - { - p0->error = node->errors[IP4_ARP_ERROR_NON_ARP_ADJ]; - } - else - /* Send ARP request. */ - { - u32 bi0 = 0; - vlib_buffer_t *b0; - ethernet_arp_header_t *h0; - vnet_hw_interface_t *hw_if0; - - h0 = - vlib_packet_template_get_packet (vm, - &im->ip4_arp_request_packet_template, - &bi0); - - /* Add rewrite/encap string for ARP packet. */ - vnet_rewrite_one_header (adj0[0], h0, - sizeof (ethernet_header_t)); - - hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0); - - /* Src ethernet address in ARP header. */ - clib_memcpy (h0->ip4_over_ethernet[0].ethernet, - hw_if0->hw_address, - sizeof (h0->ip4_over_ethernet[0].ethernet)); - - if (is_glean) - { - /* The interface's source address is stashed in the Glean Adj */ - h0->ip4_over_ethernet[0].ip4 = - adj0->sub_type.glean.receive_addr.ip4; - - /* Copy in destination address we are requesting. This is the - * glean case, so it's the packet's destination.*/ - h0->ip4_over_ethernet[1].ip4.data_u32 = - ip0->dst_address.data_u32; - } - else - { - /* Src IP address in ARP header. */ - if (ip4_src_address_for_packet (lm, sw_if_index0, - &h0-> - ip4_over_ethernet[0].ip4)) - { - /* No source address available */ - p0->error = - node->errors[IP4_ARP_ERROR_NO_SOURCE_ADDRESS]; - vlib_buffer_free (vm, &bi0, 1); - continue; - } - - /* Copy in destination address we are requesting from the - incomplete adj */ - h0->ip4_over_ethernet[1].ip4.data_u32 = - adj0->sub_type.nbr.next_hop.ip4.as_u32; - } - - vlib_buffer_copy_trace_flag (vm, p0, bi0); - b0 = vlib_get_buffer (vm, bi0); - vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index0; - - vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes); - - vlib_set_next_frame_buffer (vm, node, - adj0->rewrite_header.next_index, - bi0); - } - } - - vlib_put_next_frame (vm, node, IP4_ARP_NEXT_DROP, n_left_to_next_drop); - } - - return frame->n_vectors; -} - -static uword -ip4_arp (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - return (ip4_arp_inline (vm, node, frame, 0)); -} - -static uword -ip4_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - return (ip4_arp_inline (vm, node, frame, 1)); -} - -static char *ip4_arp_error_strings[] = { - [IP4_ARP_ERROR_DROP] = "address overflow drops", - [IP4_ARP_ERROR_REQUEST_SENT] = "ARP requests sent", - [IP4_ARP_ERROR_NON_ARP_ADJ] = "ARPs to non-ARP adjacencies", - [IP4_ARP_ERROR_REPLICATE_DROP] = "ARP replication completed", - [IP4_ARP_ERROR_REPLICATE_FAIL] = "ARP replication failed", - [IP4_ARP_ERROR_NO_SOURCE_ADDRESS] = "no source address for ARP request", -}; - -VLIB_REGISTER_NODE (ip4_arp_node) = -{ - .function = ip4_arp,.name = "ip4-arp",.vector_size = - sizeof (u32),.format_trace = format_ip4_forward_next_trace,.n_errors = - ARRAY_LEN (ip4_arp_error_strings),.error_strings = - ip4_arp_error_strings,.n_next_nodes = IP4_ARP_N_NEXT,.next_nodes = - { - [IP4_ARP_NEXT_DROP] = "error-drop",} -,}; - -VLIB_REGISTER_NODE (ip4_glean_node) = -{ - .function = ip4_glean,.name = "ip4-glean",.vector_size = - sizeof (u32),.format_trace = format_ip4_forward_next_trace,.n_errors = - ARRAY_LEN (ip4_arp_error_strings),.error_strings = - ip4_arp_error_strings,.n_next_nodes = IP4_ARP_N_NEXT,.next_nodes = - { - [IP4_ARP_NEXT_DROP] = "error-drop",} -,}; - -#define foreach_notrace_ip4_arp_error \ -_(DROP) \ -_(REQUEST_SENT) \ -_(REPLICATE_DROP) \ -_(REPLICATE_FAIL) - -clib_error_t * -arp_notrace_init (vlib_main_t * vm) -{ - vlib_node_runtime_t *rt = vlib_node_get_runtime (vm, ip4_arp_node.index); - - /* don't trace ARP request packets */ -#define _(a) \ - vnet_pcap_drop_trace_filter_add_del \ - (rt->errors[IP4_ARP_ERROR_##a], \ - 1 /* is_add */); - foreach_notrace_ip4_arp_error; -#undef _ - return 0; -} - -VLIB_INIT_FUNCTION (arp_notrace_init); - - -/* Send an ARP request to see if given destination is reachable on given interface. */ -clib_error_t * -ip4_probe_neighbor (vlib_main_t * vm, ip4_address_t * dst, u32 sw_if_index) -{ - vnet_main_t *vnm = vnet_get_main (); - ip4_main_t *im = &ip4_main; - ethernet_arp_header_t *h; - ip4_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; - u32 bi = 0; - - 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_ip4_address, dst, - format_vnet_sw_if_index_name, vnm, - sw_if_index); - } - - src = - ip4_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_ip4_address, dst, - format_vnet_sw_if_index_name, vnm, sw_if_index); - } - - adj = ip_get_adjacency (&im->lookup_main, ia->neighbor_probe_adj_index); - - h = - vlib_packet_template_get_packet (vm, &im->ip4_arp_request_packet_template, - &bi); - - hi = vnet_get_sup_hw_interface (vnm, sw_if_index); - - clib_memcpy (h->ip4_over_ethernet[0].ethernet, hi->hw_address, - sizeof (h->ip4_over_ethernet[0].ethernet)); - - h->ip4_over_ethernet[0].ip4 = src[0]; - h->ip4_over_ethernet[1].ip4 = dst[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). */ - 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); - } - - return /* no error */ 0; -} - -typedef enum -{ - IP4_REWRITE_NEXT_DROP, - IP4_REWRITE_NEXT_ICMP_ERROR, -} ip4_rewrite_next_t; - -always_inline uword -ip4_rewrite_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, int is_midchain) -{ - ip_lookup_main_t *lm = &ip4_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, ip4_input_node.index); - - n_left_from = frame->n_vectors; - next_index = node->cached_next_index; - u32 cpu_index = os_get_cpu_number (); - - 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; - ip4_header_t *ip0, *ip1; - u32 pi0, rw_len0, next0, error0, checksum0, adj_index0; - u32 pi1, rw_len1, next1, error1, checksum1, 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, 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); - - adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; - adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX]; - - /* We should never rewrite a pkt using the MISS adjacency */ - ASSERT (adj_index0 && adj_index1); - - ip0 = vlib_buffer_get_current (p0); - ip1 = vlib_buffer_get_current (p1); - - error0 = error1 = IP4_ERROR_NONE; - next0 = next1 = IP4_REWRITE_NEXT_DROP; - - /* Decrement TTL & update checksum. - Works either endian, so no need for byte swap. */ - if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED))) - { - i32 ttl0 = ip0->ttl; - - /* Input node should have reject packets with ttl 0. */ - ASSERT (ip0->ttl > 0); - - checksum0 = ip0->checksum + clib_host_to_net_u16 (0x0100); - checksum0 += checksum0 >= 0xffff; - - ip0->checksum = checksum0; - ttl0 -= 1; - ip0->ttl = ttl0; - - /* - * If the ttl drops below 1 when forwarding, generate - * an ICMP response. - */ - if (PREDICT_FALSE (ttl0 <= 0)) - { - error0 = IP4_ERROR_TIME_EXPIRED; - vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (p0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = IP4_REWRITE_NEXT_ICMP_ERROR; - } - - /* Verify checksum. */ - ASSERT (ip0->checksum == ip4_header_checksum (ip0)); - } - else - { - p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED; - } - if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_LOCALLY_ORIGINATED))) - { - i32 ttl1 = ip1->ttl; - - /* Input node should have reject packets with ttl 0. */ - ASSERT (ip1->ttl > 0); - - checksum1 = ip1->checksum + clib_host_to_net_u16 (0x0100); - checksum1 += checksum1 >= 0xffff; - - ip1->checksum = checksum1; - ttl1 -= 1; - ip1->ttl = ttl1; - - /* - * If the ttl drops below 1 when forwarding, generate - * an ICMP response. - */ - if (PREDICT_FALSE (ttl1 <= 0)) - { - error1 = IP4_ERROR_TIME_EXPIRED; - vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (p1, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next1 = IP4_REWRITE_NEXT_ICMP_ERROR; - } - - /* Verify checksum. */ - ASSERT (ip0->checksum == ip4_header_checksum (ip0)); - ASSERT (ip1->checksum == ip4_header_checksum (ip1)); - } - else - { - p1->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED; - } - - /* Rewrite packet header and updates lengths. */ - adj0 = ip_get_adjacency (lm, adj_index0); - adj1 = ip_get_adjacency (lm, adj_index1); - - /* Worth pipelining. No guarantee that adj0,1 are hot... */ - 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; - - /* Check MTU of outgoing interface. */ - error0 = - (vlib_buffer_length_in_chain (vm, p0) > - adj0[0]. - rewrite_header.max_l3_packet_bytes ? IP4_ERROR_MTU_EXCEEDED : - error0); - error1 = - (vlib_buffer_length_in_chain (vm, p1) > - adj1[0]. - rewrite_header.max_l3_packet_bytes ? IP4_ERROR_MTU_EXCEEDED : - error1); - - /* - * We've already accounted for an ethernet_header_t elsewhere - */ - if (PREDICT_FALSE (rw_len0 > sizeof (ethernet_header_t))) - vlib_increment_combined_counter - (&adjacency_counters, cpu_index, adj_index0, - /* packet increment */ 0, - /* byte increment */ rw_len0 - sizeof (ethernet_header_t)); - - if (PREDICT_FALSE (rw_len1 > sizeof (ethernet_header_t))) - vlib_increment_combined_counter - (&adjacency_counters, cpu_index, adj_index1, - /* packet increment */ 0, - /* byte increment */ rw_len1 - sizeof (ethernet_header_t)); - - /* Don't adjust the buffer for ttl issue; icmp-error node wants - * to see the IP headerr */ - if (PREDICT_TRUE (error0 == IP4_ERROR_NONE)) - { - next0 = adj0[0].rewrite_header.next_index; - 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; - - vnet_feature_arc_start (lm->output_feature_arc_index, - tx_sw_if_index0, &next0, p0); - } - if (PREDICT_TRUE (error1 == IP4_ERROR_NONE)) - { - next1 = adj1[0].rewrite_header.next_index; - 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; - - 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); - } - - 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; - ip4_header_t *ip0; - u32 pi0, rw_len0, adj_index0, next0, error0, checksum0; - 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]; - - /* We should never rewrite a pkt using the MISS adjacency */ - ASSERT (adj_index0); - - adj0 = ip_get_adjacency (lm, adj_index0); - - ip0 = vlib_buffer_get_current (p0); - - error0 = IP4_ERROR_NONE; - next0 = IP4_REWRITE_NEXT_DROP; /* drop on error */ - - /* Decrement TTL & update checksum. */ - if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED))) - { - i32 ttl0 = ip0->ttl; - - checksum0 = ip0->checksum + clib_host_to_net_u16 (0x0100); - - checksum0 += checksum0 >= 0xffff; - - ip0->checksum = checksum0; - - ASSERT (ip0->ttl > 0); - - ttl0 -= 1; - - ip0->ttl = ttl0; - - ASSERT (ip0->checksum == ip4_header_checksum (ip0)); - - if (PREDICT_FALSE (ttl0 <= 0)) - { - /* - * If the ttl drops below 1 when forwarding, generate - * an ICMP response. - */ - error0 = IP4_ERROR_TIME_EXPIRED; - next0 = IP4_REWRITE_NEXT_ICMP_ERROR; - vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (p0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - } - } - else - { - p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED; - } - - /* Guess we are only writing on simple Ethernet header. */ - vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t)); - - /* Update packet buffer attributes/set output interface. */ - rw_len0 = adj0[0].rewrite_header.data_bytes; - vnet_buffer (p0)->ip.save_rewrite_length = rw_len0; - - if (PREDICT_FALSE (rw_len0 > sizeof (ethernet_header_t))) - vlib_increment_combined_counter - (&adjacency_counters, cpu_index, adj_index0, - /* packet increment */ 0, - /* byte increment */ rw_len0 - sizeof (ethernet_header_t)); - - /* Check MTU of outgoing interface. */ - error0 = (vlib_buffer_length_in_chain (vm, p0) - > adj0[0].rewrite_header.max_l3_packet_bytes - ? IP4_ERROR_MTU_EXCEEDED : error0); - - p0->error = error_node->errors[error0]; - - /* Don't adjust the buffer for ttl issue; icmp-error node wants - * to see the IP headerr */ - if (PREDICT_TRUE (error0 == IP4_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 (is_midchain) - { - adj0->sub_type.midchain.fixup_func (vm, adj0, p0); - } - - vnet_feature_arc_start (lm->output_feature_arc_index, - tx_sw_if_index0, &next0, p0); - - } - - 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) - ip4_forward_next_trace (vm, node, frame, VLIB_TX); - - return frame->n_vectors; -} - - -/** @brief IPv4 rewrite node. - @node ip4-rewrite - - This is the IPv4 transit-rewrite node: decrement TTL, fix the ipv4 - header checksum, fetch the ip adjacency, check the outbound mtu, - apply the adjacency rewrite, and send pkts to the adjacency - rewrite header's rewrite_next_index. - - @param vm vlib_main_t corresponding to the current thread - @param node vlib_node_runtime_t - @param frame vlib_frame_t whose contents should be dispatched - - @par Graph mechanics: buffer metadata, next index usage - - @em Uses: - - <code>vnet_buffer(b)->ip.adj_index[VLIB_TX]</code> - - the rewrite adjacency index - - <code>adj->lookup_next_index</code> - - Must be IP_LOOKUP_NEXT_REWRITE or IP_LOOKUP_NEXT_ARP, otherwise - the packet will be dropped. - - <code>adj->rewrite_header</code> - - Rewrite string length, rewrite string, next_index - - @em Sets: - - <code>b->current_data, b->current_length</code> - - Updated net of applying the rewrite string - - <em>Next Indices:</em> - - <code> adj->rewrite_header.next_index </code> - or @c error-drop -*/ -static uword -ip4_rewrite (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - return ip4_rewrite_inline (vm, node, frame, 0); -} - -static uword -ip4_midchain (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - return ip4_rewrite_inline (vm, node, frame, 1); -} - - -VLIB_REGISTER_NODE (ip4_rewrite_node) = -{ - .function = ip4_rewrite,.name = "ip4-rewrite",.vector_size = - sizeof (u32),.format_trace = format_ip4_rewrite_trace,.n_next_nodes = - 2,.next_nodes = - { - [IP4_REWRITE_NEXT_DROP] = "error-drop", - [IP4_REWRITE_NEXT_ICMP_ERROR] = "ip4-icmp-error",} -,}; - -VLIB_NODE_FUNCTION_MULTIARCH (ip4_rewrite_node, ip4_rewrite); - -VLIB_REGISTER_NODE (ip4_midchain_node) = -{ -.function = ip4_midchain,.name = "ip4-midchain",.vector_size = - sizeof (u32),.format_trace = format_ip4_forward_next_trace,.sibling_of = - "ip4-rewrite",}; - -VLIB_NODE_FUNCTION_MULTIARCH (ip4_midchain_node, ip4_midchain); - -static clib_error_t * -add_del_interface_table (vlib_main_t * vm, - unformat_input_t * input, vlib_cli_command_t * cmd) -{ - vnet_main_t *vnm = vnet_get_main (); - clib_error_t *error = 0; - u32 sw_if_index, table_id; - - sw_if_index = ~0; - - if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) - { - error = clib_error_return (0, "unknown interface `%U'", - format_unformat_error, input); - goto done; - } - - if (unformat (input, "%d", &table_id)) - ; - else - { - error = clib_error_return (0, "expected table id `%U'", - format_unformat_error, input); - goto done; - } - - { - ip4_main_t *im = &ip4_main; - u32 fib_index; - - fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, - table_id); - - // - // FIXME-LATER - // changing an interface's table has consequences for any connecteds - // and adj-fibs already installed. - // - vec_validate (im->fib_index_by_sw_if_index, sw_if_index); - im->fib_index_by_sw_if_index[sw_if_index] = fib_index; - } - -done: - return error; -} - -/*? - * Place the indicated interface into the supplied IPv4 FIB table (also known - * as a VRF). If the FIB table does not exist, this command creates it. To - * display the current IPv4 FIB table, use the command '<em>show ip fib</em>'. - * FIB table will only be displayed if a route has been added to the table, or - * an IP Address is assigned to an interface in the table (which adds a route - * automatically). - * - * @note IP addresses added after setting the interface IP table end up in - * the indicated FIB table. If the IP address is added prior to adding the - * interface to the FIB table, it will NOT be part of the FIB table. Predictable - * but potentially counter-intuitive results occur if you provision interface - * addresses in multiple FIBs. Upon RX, packets will be processed in the last - * IP table ID provisioned. It might be marginally useful to evade source RPF - * drops to put an interface address into multiple FIBs. - * - * @cliexpar - * Example of how to add an interface to an IPv4 FIB table (where 2 is the table-id): - * @cliexcmd{set interface ip table GigabitEthernet2/0/0 2} - ?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (set_interface_ip_table_command, static) = -{ - .path = "set interface ip table", - .function = add_del_interface_table, - .short_help = "set interface ip table <interface> <table-id>", -}; -/* *INDENT-ON* */ - - -static uword -ip4_lookup_multicast (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - ip4_main_t *im = &ip4_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 cpu_index = os_get_cpu_number (); - - 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, lb_index0, lb_index1, wrong_next; - ip_lookup_next_t next0, next1; - ip4_header_t *ip0, *ip1; - u32 fib_index0, fib_index1; - 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); - - 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]; - - lb_index0 = ip4_fib_table_lookup_lb (ip4_fib_get (fib_index0), - &ip0->dst_address); - lb_index1 = ip4_fib_table_lookup_lb (ip4_fib_get (fib_index1), - &ip1->dst_address); - - lb0 = load_balance_get (lb_index0); - lb1 = load_balance_get (lb_index1); - - ASSERT (lb0->lb_n_buckets > 0); - ASSERT (is_pow2 (lb0->lb_n_buckets)); - ASSERT (lb1->lb_n_buckets > 0); - ASSERT (is_pow2 (lb1->lb_n_buckets)); - - vnet_buffer (p0)->ip.flow_hash = ip4_compute_flow_hash - (ip0, lb0->lb_hash_config); - - vnet_buffer (p1)->ip.flow_hash = ip4_compute_flow_hash - (ip1, lb1->lb_hash_config); - - dpo0 = load_balance_get_bucket_i (lb0, - (vnet_buffer (p0)->ip.flow_hash & - (lb0->lb_n_buckets_minus_1))); - dpo1 = load_balance_get_bucket_i (lb1, - (vnet_buffer (p1)->ip.flow_hash & - (lb1->lb_n_buckets_minus_1))); - - next0 = dpo0->dpoi_next_node; - vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; - next1 = dpo1->dpoi_next_node; - vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index; - - if (1) /* $$$$$$ HACK FIXME */ - vlib_increment_combined_counter - (cm, cpu_index, lb_index0, 1, - vlib_buffer_length_in_chain (vm, p0)); - if (1) /* $$$$$$ HACK FIXME */ - vlib_increment_combined_counter - (cm, cpu_index, lb_index1, 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; - ip4_header_t *ip0; - u32 pi0, lb_index0; - ip_lookup_next_t next0; - u32 fib_index0; - const dpo_id_t *dpo0; - const load_balance_t *lb0; - - pi0 = from[0]; - to_next[0] = pi0; - - p0 = vlib_get_buffer (vm, pi0); - - ip0 = vlib_buffer_get_current (p0); - - 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]; - - lb_index0 = ip4_fib_table_lookup_lb (ip4_fib_get (fib_index0), - &ip0->dst_address); - - lb0 = load_balance_get (lb_index0); - - ASSERT (lb0->lb_n_buckets > 0); - ASSERT (is_pow2 (lb0->lb_n_buckets)); - - vnet_buffer (p0)->ip.flow_hash = ip4_compute_flow_hash - (ip0, lb0->lb_hash_config); - - dpo0 = load_balance_get_bucket_i (lb0, - (vnet_buffer (p0)->ip.flow_hash & - (lb0->lb_n_buckets_minus_1))); - - next0 = dpo0->dpoi_next_node; - vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; - - if (1) /* $$$$$$ HACK FIXME */ - vlib_increment_combined_counter - (cm, cpu_index, lb_index0, 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) - ip4_forward_next_trace (vm, node, frame, VLIB_TX); - - return frame->n_vectors; -} - -VLIB_REGISTER_NODE (ip4_lookup_multicast_node, static) = -{ -.function = ip4_lookup_multicast,.name = - "ip4-lookup-multicast",.vector_size = sizeof (u32),.sibling_of = - "ip4-lookup",.format_trace = format_ip4_lookup_trace,.n_next_nodes = 0,}; - -VLIB_NODE_FUNCTION_MULTIARCH (ip4_lookup_multicast_node, - ip4_lookup_multicast); - -VLIB_REGISTER_NODE (ip4_multicast_node, static) = -{ - .function = ip4_drop,.name = "ip4-multicast",.vector_size = - sizeof (u32),.format_trace = format_ip4_forward_next_trace,.n_next_nodes = - 1,.next_nodes = - { - [0] = "error-drop",} -,}; - -int -ip4_lookup_validate (ip4_address_t * a, u32 fib_index0) -{ - ip4_fib_mtrie_t *mtrie0; - ip4_fib_mtrie_leaf_t leaf0; - u32 lbi0; - - mtrie0 = &ip4_fib_get (fib_index0)->mtrie; - - leaf0 = IP4_FIB_MTRIE_LEAF_ROOT; - leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, a, 0); - leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, a, 1); - leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, a, 2); - leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, a, 3); - - /* Handle default route. */ - leaf0 = (leaf0 == IP4_FIB_MTRIE_LEAF_EMPTY ? mtrie0->default_leaf : leaf0); - - lbi0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0); - - return lbi0 == ip4_fib_table_lookup_lb (ip4_fib_get (fib_index0), a); -} - -static clib_error_t * -test_lookup_command_fn (vlib_main_t * vm, - unformat_input_t * input, vlib_cli_command_t * cmd) -{ - ip4_fib_t *fib; - u32 table_id = 0; - f64 count = 1; - u32 n; - int i; - ip4_address_t ip4_base_address; - u64 errors = 0; - - while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) - { - if (unformat (input, "table %d", &table_id)) - { - /* Make sure the entry exists. */ - fib = ip4_fib_get (table_id); - if ((fib) && (fib->index != table_id)) - return clib_error_return (0, "<fib-index> %d does not exist", - table_id); - } - else if (unformat (input, "count %f", &count)) - ; - - else if (unformat (input, "%U", - unformat_ip4_address, &ip4_base_address)) - ; - else - return clib_error_return (0, "unknown input `%U'", - format_unformat_error, input); - } - - n = count; - - for (i = 0; i < n; i++) - { - if (!ip4_lookup_validate (&ip4_base_address, table_id)) - errors++; - - ip4_base_address.as_u32 = - clib_host_to_net_u32 (1 + - clib_net_to_host_u32 (ip4_base_address.as_u32)); - } - - if (errors) - vlib_cli_output (vm, "%llu errors out of %d lookups\n", errors, n); - else - vlib_cli_output (vm, "No errors in %d lookups\n", n); - - return 0; -} - -/*? - * Perform a lookup of an IPv4 Address (or range of addresses) in the - * given FIB table to determine if there is a conflict with the - * adjacency table. The fib-id can be determined by using the - * '<em>show ip fib</em>' command. If fib-id is not entered, default value - * of 0 is used. - * - * @todo This command uses fib-id, other commands use table-id (not - * just a name, they are different indexes). Would like to change this - * to table-id for consistency. - * - * @cliexpar - * Example of how to run the test lookup command: - * @cliexstart{test lookup 172.16.1.1 table 1 count 2} - * No errors in 2 lookups - * @cliexend -?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (lookup_test_command, static) = -{ - .path = "test lookup", - .short_help = "test lookup <ipv4-addr> [table <fib-id>] [count <nn>]", - .function = test_lookup_command_fn, -}; -/* *INDENT-ON* */ - -int -vnet_set_ip4_flow_hash (u32 table_id, u32 flow_hash_config) -{ - ip4_main_t *im4 = &ip4_main; - ip4_fib_t *fib; - uword *p = hash_get (im4->fib_index_by_table_id, table_id); - - if (p == 0) - return VNET_API_ERROR_NO_SUCH_FIB; - - fib = ip4_fib_get (p[0]); - - fib->flow_hash_config = flow_hash_config; - return 0; -} - -static clib_error_t * -set_ip_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_ip4_flow_hash (table_id, flow_hash_config); - switch (rv) - { - case 0: - break; - - case VNET_API_ERROR_NO_SUCH_FIB: - 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 IPv4 fields used by the flow hash. - * - * @cliexpar - * Example of how to set the flow hash on a given table: - * @cliexcmd{set ip flow-hash table 7 dst sport dport proto} - * Example of display the configured flow hash: - * @cliexstart{show ip fib} - * ipv4-VRF:0, fib_index 0, flow hash: src dst sport dport proto - * 0.0.0.0/0 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:0 buckets:1 uRPF:0 to:[0:0]] - * [0] [@0]: dpo-drop ip6 - * 0.0.0.0/32 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:1 buckets:1 uRPF:1 to:[0:0]] - * [0] [@0]: dpo-drop ip6 - * 224.0.0.0/8 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:3 buckets:1 uRPF:3 to:[0:0]] - * [0] [@0]: dpo-drop ip6 - * 6.0.1.2/32 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:30 buckets:1 uRPF:29 to:[0:0]] - * [0] [@3]: arp-ipv4: via 6.0.0.1 af_packet0 - * 7.0.0.1/32 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:31 buckets:4 uRPF:30 to:[0:0]] - * [0] [@3]: arp-ipv4: via 6.0.0.2 af_packet0 - * [1] [@3]: arp-ipv4: via 6.0.0.2 af_packet0 - * [2] [@3]: arp-ipv4: via 6.0.0.2 af_packet0 - * [3] [@3]: arp-ipv4: via 6.0.0.1 af_packet0 - * 240.0.0.0/8 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:2 buckets:1 uRPF:2 to:[0:0]] - * [0] [@0]: dpo-drop ip6 - * 255.255.255.255/32 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:4 buckets:1 uRPF:4 to:[0:0]] - * [0] [@0]: dpo-drop ip6 - * ipv4-VRF:7, fib_index 1, flow hash: dst sport dport proto - * 0.0.0.0/0 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:12 buckets:1 uRPF:11 to:[0:0]] - * [0] [@0]: dpo-drop ip6 - * 0.0.0.0/32 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:13 buckets:1 uRPF:12 to:[0:0]] - * [0] [@0]: dpo-drop ip6 - * 172.16.1.0/24 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:17 buckets:1 uRPF:16 to:[0:0]] - * [0] [@4]: ipv4-glean: af_packet0 - * 172.16.1.1/32 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:18 buckets:1 uRPF:17 to:[1:84]] - * [0] [@2]: dpo-receive: 172.16.1.1 on af_packet0 - * 172.16.1.2/32 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]] - * [0] [@5]: ipv4 via 172.16.1.2 af_packet0: IP4: 02:fe:9e:70:7a:2b -> 26:a5:f6:9c:3a:36 - * 172.16.2.0/24 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:19 buckets:1 uRPF:18 to:[0:0]] - * [0] [@4]: ipv4-glean: af_packet1 - * 172.16.2.1/32 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:20 buckets:1 uRPF:19 to:[0:0]] - * [0] [@2]: dpo-receive: 172.16.2.1 on af_packet1 - * 224.0.0.0/8 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:15 buckets:1 uRPF:14 to:[0:0]] - * [0] [@0]: dpo-drop ip6 - * 240.0.0.0/8 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:14 buckets:1 uRPF:13 to:[0:0]] - * [0] [@0]: dpo-drop ip6 - * 255.255.255.255/32 - * unicast-ip4-chain - * [@0]: dpo-load-balance: [index:16 buckets:1 uRPF:15 to:[0:0]] - * [0] [@0]: dpo-drop ip6 - * @cliexend -?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (set_ip_flow_hash_command, static) = -{ - .path = "set ip flow-hash", - .short_help = - "set ip flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]", - .function = set_ip_flow_hash_command_fn, -}; -/* *INDENT-ON* */ - -int -vnet_set_ip4_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; - ip4_main_t *ipm = &ip4_main; - ip_lookup_main_t *lm = &ipm->lookup_main; - vnet_classify_main_t *cm = &vnet_classify_main; - ip4_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 = ip4_interface_first_address (ipm, sw_if_index, NULL); - - if (NULL != if_addr) - { - fib_prefix_t pfx = { - .fp_len = 32, - .fp_proto = FIB_PROTOCOL_IP4, - .fp_addr.ip4 = *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_IP4, - classify_dpo_create (DPO_PROTO_IP4, 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_ip_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_ip4_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 ip classify intfc GigabitEthernet2/0/0 table-index 1} -?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (set_ip_classify_command, static) = -{ - .path = "set ip classify", - .short_help = - "set ip classify intfc <interface> table-index <classify-idx>", - .function = set_ip_classify_command_fn, -}; -/* *INDENT-ON* */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |