+++ /dev/null
-/*
- * Copyright (c) 2016 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <vnet/vnet.h>
-#include <vnet/adj/adj_l2.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/ip/ip.h>
-
-/**
- * @brief Trace data for a L2 Midchain
- */
-typedef struct adj_l2_trace_t_ {
- /** Adjacency index taken. */
- u32 adj_index;
-} adj_l2_trace_t;
-
-static u8 *
-format_adj_l2_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 *);
- adj_l2_trace_t * t = va_arg (*args, adj_l2_trace_t *);
-
- s = format (s, "adj-idx %d : %U",
- t->adj_index,
- format_ip_adjacency, t->adj_index, FORMAT_IP_ADJACENCY_NONE);
- return s;
-}
-
-typedef enum adj_l2_rewrite_next_t_
-{
- ADJ_L2_REWRITE_NEXT_DROP,
-} adj_l2_rewrite_next_t;
-
-always_inline uword
-adj_l2_rewrite_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame,
- int is_midchain)
-{
- u32 * from = vlib_frame_vector_args (frame);
- u32 n_left_from, n_left_to_next, * to_next, next_index;
- u32 cpu_index = os_get_cpu_number();
- ethernet_main_t * em = ðernet_main;
-
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- ip_adjacency_t * adj0;
- vlib_buffer_t * p0;
- char *h0;
- u32 pi0, rw_len0, adj_index0, next0 = 0;
- u32 tx_sw_if_index0;
-
- 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);
- h0 = vlib_buffer_get_current (p0);
-
- adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
-
- /* We should never rewrite a pkt using the MISS adjacency */
- ASSERT(adj_index0);
-
- adj0 = adj_get (adj_index0);
-
- /* Guess we are only writing on simple Ethernet header. */
- vnet_rewrite_one_header (adj0[0], h0,
- 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;
-
- 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. */
- if (PREDICT_TRUE((vlib_buffer_length_in_chain (vm, p0) <=
- adj0[0].rewrite_header.max_l3_packet_bytes)))
- {
- /* Don't adjust the buffer for ttl issue; icmp-error node wants
- * to see the IP headerr */
- p0->current_data -= rw_len0;
- p0->current_length += rw_len0;
- tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
-
- if (is_midchain)
- {
- adj0->sub_type.midchain.fixup_func(vm, adj0, p0);
- }
-
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
-
- /*
- * Follow the feature ARC. this will result eventually in
- * the midchain-tx node
- */
- vnet_feature_arc_start(em->output_feature_arc_index, tx_sw_if_index0, &next0, p0);
- }
- else
- {
- /* can't fragment L2 */
- next0 = ADJ_L2_REWRITE_NEXT_DROP;
- }
-
- if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED))
- {
- adj_l2_trace_t *tr = vlib_add_trace (vm, node,
- p0, sizeof (*tr));
- tr->adj_index = vnet_buffer(p0)->ip.adj_index[VLIB_TX];
- }
-
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- pi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
-}
-
-static uword
-adj_l2_rewrite (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return adj_l2_rewrite_inline (vm, node, frame, 0);
-}
-
-static uword
-adj_l2_midchain (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return adj_l2_rewrite_inline (vm, node, frame, 1);
-}
-
-VLIB_REGISTER_NODE (adj_l2_rewrite_node) = {
- .function = adj_l2_rewrite,
- .name = "adj-l2-rewrite",
- .vector_size = sizeof (u32),
-
- .format_trace = format_adj_l2_trace,
-
- .n_next_nodes = 1,
- .next_nodes = {
- [ADJ_L2_REWRITE_NEXT_DROP] = "error-drop",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (adj_l2_rewrite_node, adj_l2_rewrite)
-
-VLIB_REGISTER_NODE (adj_l2_midchain_node) = {
- .function = adj_l2_midchain,
- .name = "adj-l2-midchain",
- .vector_size = sizeof (u32),
-
- .format_trace = format_adj_l2_trace,
-
- .n_next_nodes = 1,
- .next_nodes = {
- [ADJ_L2_REWRITE_NEXT_DROP] = "error-drop",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (adj_l2_midchain_node, adj_l2_midchain)
Code Review / vpp.git / blobdiff