+++ /dev/null
-/*
- * l2e_node.c : l2 emulation node
- *
- * Copyright (c) 2019 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 <plugins/l2e/l2e.h>
-#include <vnet/l2/l2_input.h>
-#include <vnet/l2/feat_bitmap.h>
-
-#define foreach_l2_emulation \
- _(IP4, "Extract IPv4") \
- _(IP6, "Extract IPv6")
-
-typedef enum
-{
-#define _(sym,str) L2_EMULATION_ERROR_##sym,
- foreach_l2_emulation
-#undef _
- L2_EMULATION_N_ERROR,
-} l2_emulation_error_t;
-
-static char *l2_emulation_error_strings[] = {
-#define _(sym,string) string,
- foreach_l2_emulation
-#undef _
-};
-
-typedef enum
-{
-#define _(sym,str) L2_EMULATION_NEXT_##sym,
- foreach_l2_emulation
-#undef _
- L2_EMULATION_N_NEXT,
-} l2_emulation_next_t;
-
-/* packet trace format function */
-static u8 *
-format_l2_emulation_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 *);
- l2_emulation_trace_t *t = va_arg (*args, l2_emulation_trace_t *);
-
- s = format (s, "l2-emulation: %s", (t->extracted ? "yes" : "no"));
-
- return s;
-}
-
-VLIB_NODE_FN (l2_emulation_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- l2_emulation_main_t *em = &l2_emulation_main;
- u32 n_left_from, *from, *to_next;
- l2_emulation_next_t next_index;
- u32 ip4_hits = 0;
- u32 ip6_hits = 0;
-
- next_index = 0;
- n_left_from = frame->n_vectors;
- from = vlib_frame_vector_args (frame);
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- vlib_buffer_t *b0, *b1;
- u32 sw_if_index0, sw_if_index1;
- u16 ether_type0, ether_type1;
- u32 next0 = ~0, next1 = ~0;
- u8 l2_len0, l2_len1;
- u32 bi0, bi1;
- u8 *h0, *h1;
-
- bi0 = to_next[0] = from[0];
- bi1 = to_next[1] = from[1];
-
- from += 2;
- n_left_from -= 2;
- to_next += 2;
- n_left_to_next -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
- l2_len0 = vnet_buffer (b0)->l2.l2_len;
- l2_len1 = vnet_buffer (b1)->l2.l2_len;
-
- h0 = vlib_buffer_get_current (b0);
- h1 = vlib_buffer_get_current (b1);
-
- ether_type0 = clib_net_to_host_u16 (*(u16 *) (h0 + l2_len0 - 2));
- ether_type1 = clib_net_to_host_u16 (*(u16 *) (h1 + l2_len1 - 2));
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
-
- /*
- * only extract unicast
- */
- if (PREDICT_TRUE (!(h0[0] & 0x1)))
- {
- switch (ether_type0)
- {
- case ETHERNET_TYPE_IP4:
- ASSERT (em->l2_emulations[sw_if_index0].enabled);
- ++ip4_hits;
- next0 = L2_EMULATION_NEXT_IP4;
- vlib_buffer_advance (b0, l2_len0);
- break;
- case ETHERNET_TYPE_IP6:
- ASSERT (em->l2_emulations[sw_if_index0].enabled);
- ++ip6_hits;
- next0 = L2_EMULATION_NEXT_IP6;
- vlib_buffer_advance (b0, l2_len0);
- default:
- break;
- }
- }
- if (PREDICT_TRUE (!(h1[0] & 0x1)))
- {
- switch (ether_type1)
- {
- case ETHERNET_TYPE_IP4:
- ASSERT (em->l2_emulations[sw_if_index1].enabled);
- ++ip4_hits;
- next1 = L2_EMULATION_NEXT_IP4;
- vlib_buffer_advance (b1, l2_len1);
- break;
- case ETHERNET_TYPE_IP6:
- ASSERT (em->l2_emulations[sw_if_index1].enabled);
- ++ip6_hits;
- next1 = L2_EMULATION_NEXT_IP6;
- vlib_buffer_advance (b1, l2_len1);
- default:
- break;
- }
- }
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- l2_emulation_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->extracted = (next0 != ~0);
- }
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- l2_emulation_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->extracted = (next1 != ~0);
- }
-
- /* Determine the next node and remove ourself from bitmap */
- if (PREDICT_TRUE (next0 == ~0))
- next0 = vnet_l2_feature_next (b0, em->l2_input_feat_next,
- L2INPUT_FEAT_L2_EMULATION);
-
- /* Determine the next node and remove ourself from bitmap */
- if (PREDICT_TRUE (next1 == ~0))
- next1 = vnet_l2_feature_next (b1, em->l2_input_feat_next,
- L2INPUT_FEAT_L2_EMULATION);
-
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- vlib_buffer_t *b0;
- u32 sw_if_index0;
- u16 ether_type0;
- u32 next0 = ~0;
- u8 l2_len0;
- u32 bi0;
- u8 *h0;
-
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- l2_len0 = vnet_buffer (b0)->l2.l2_len;
-
- h0 = vlib_buffer_get_current (b0);
- ether_type0 = clib_net_to_host_u16 (*(u16 *) (h0 + l2_len0 - 2));
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
-
- /*
- * only extract unicast
- */
- if (PREDICT_TRUE (!(h0[0] & 0x1)))
- {
- switch (ether_type0)
- {
- case ETHERNET_TYPE_IP4:
- ASSERT (em->l2_emulations[sw_if_index0].enabled);
- ++ip4_hits;
- next0 = L2_EMULATION_NEXT_IP4;
- vlib_buffer_advance (b0, l2_len0);
- break;
- case ETHERNET_TYPE_IP6:
- ASSERT (em->l2_emulations[sw_if_index0].enabled);
- ++ip6_hits;
- next0 = L2_EMULATION_NEXT_IP6;
- vlib_buffer_advance (b0, l2_len0);
- default:
- break;
- }
- }
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- l2_emulation_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->extracted = (next0 != ~0);
- }
-
- /* Determine the next node and remove ourself from bitmap */
- if (PREDICT_TRUE (next0 == ~0))
- next0 = vnet_l2_feature_next (b0, em->l2_input_feat_next,
- L2INPUT_FEAT_L2_EMULATION);
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, node->node_index,
- L2_EMULATION_ERROR_IP4, ip4_hits);
- vlib_node_increment_counter (vm, node->node_index,
- L2_EMULATION_ERROR_IP6, ip6_hits);
-
- return frame->n_vectors;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (l2_emulation_node) = {
- .name = "l2-emulation",
- .vector_size = sizeof (u32),
- .format_trace = format_l2_emulation_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(l2_emulation_error_strings),
- .error_strings = l2_emulation_error_strings,
-
- .n_next_nodes = L2_EMULATION_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [L2_EMULATION_NEXT_IP4] = "ip4-input",
- [L2_EMULATION_NEXT_IP6] = "ip6-input",
- },
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff