+++ /dev/null
-/*
- * decap.c: vxlan tunnel decap packet processing
- *
- * Copyright (c) 2013 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 <vlib/vlib.h>
-#include <vnet/pg/pg.h>
-#include <vnet/vxlan/vxlan.h>
-
-vlib_node_registration_t vxlan4_input_node;
-vlib_node_registration_t vxlan6_input_node;
-
-typedef struct {
- u32 next_index;
- u32 tunnel_index;
- u32 error;
- u32 vni;
-} vxlan_rx_trace_t;
-
-static u8 * format_vxlan_rx_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 *);
- vxlan_rx_trace_t * t = va_arg (*args, vxlan_rx_trace_t *);
-
- if (t->tunnel_index != ~0)
- {
- s = format (s, "VXLAN decap from vxlan_tunnel%d vni %d next %d error %d",
- t->tunnel_index, t->vni, t->next_index, t->error);
- }
- else
- {
- s = format (s, "VXLAN decap error - tunnel for vni %d does not exist",
- t->vni);
- }
- return s;
-}
-
-always_inline uword
-vxlan_input (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame,
- u32 is_ip4)
-{
- u32 n_left_from, next_index, * from, * to_next;
- vxlan_main_t * vxm = &vxlan_main;
- vnet_main_t * vnm = vxm->vnet_main;
- vnet_interface_main_t * im = &vnm->interface_main;
- u32 last_tunnel_index = ~0;
- vxlan4_tunnel_key_t last_key4;
- vxlan6_tunnel_key_t last_key6;
- u32 pkts_decapsulated = 0;
- u32 cpu_index = os_get_cpu_number();
- u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
-
- if (is_ip4)
- last_key4.as_u64 = ~0;
- else
- memset (&last_key6, 0xff, sizeof (last_key6));
-
- from = vlib_frame_vector_args (from_frame);
- n_left_from = from_frame->n_vectors;
-
- next_index = node->cached_next_index;
- stats_sw_if_index = node->runtime_data[0];
- stats_n_packets = stats_n_bytes = 0;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- u32 bi0, bi1;
- vlib_buffer_t * b0, * b1;
- u32 next0, next1;
- ip4_header_t * ip4_0, * ip4_1;
- ip6_header_t * ip6_0, * ip6_1;
- vxlan_header_t * vxlan0, * vxlan1;
- uword * p0, * p1;
- u32 tunnel_index0, tunnel_index1;
- vxlan_tunnel_t * t0, * t1, * mt0 = NULL, * mt1 = NULL;
- vxlan4_tunnel_key_t key4_0, key4_1;
- vxlan6_tunnel_key_t key6_0, key6_1;
- u32 error0, error1;
- u32 sw_if_index0, sw_if_index1, len0, len1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t * p2, * p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- bi0 = from[0];
- bi1 = from[1];
- to_next[0] = bi0;
- to_next[1] = bi1;
- from += 2;
- to_next += 2;
- n_left_to_next -= 2;
- n_left_from -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- /* udp leaves current_data pointing at the vxlan header */
- vxlan0 = vlib_buffer_get_current (b0);
- vxlan1 = vlib_buffer_get_current (b1);
- if (is_ip4) {
- vlib_buffer_advance
- (b0, -(word)(sizeof(udp_header_t)+sizeof(ip4_header_t)));
- vlib_buffer_advance
- (b1, -(word)(sizeof(udp_header_t)+sizeof(ip4_header_t)));
- ip4_0 = vlib_buffer_get_current (b0);
- ip4_1 = vlib_buffer_get_current (b1);
- } else {
- vlib_buffer_advance
- (b0, -(word)(sizeof(udp_header_t)+sizeof(ip6_header_t)));
- vlib_buffer_advance
- (b1, -(word)(sizeof(udp_header_t)+sizeof(ip6_header_t)));
- ip6_0 = vlib_buffer_get_current (b0);
- ip6_1 = vlib_buffer_get_current (b1);
- }
-
- /* pop (ip, udp, vxlan) */
- if (is_ip4) {
- vlib_buffer_advance
- (b0, sizeof(*ip4_0)+sizeof(udp_header_t)+sizeof(*vxlan0));
- vlib_buffer_advance
- (b1, sizeof(*ip4_1)+sizeof(udp_header_t)+sizeof(*vxlan1));
- } else {
- vlib_buffer_advance
- (b0, sizeof(*ip6_0)+sizeof(udp_header_t)+sizeof(*vxlan0));
- vlib_buffer_advance
- (b1, sizeof(*ip6_1)+sizeof(udp_header_t)+sizeof(*vxlan1));
- }
-
- tunnel_index0 = ~0;
- error0 = 0;
-
- tunnel_index1 = ~0;
- error1 = 0;
-
- if (PREDICT_FALSE (vxlan0->flags != VXLAN_FLAGS_I))
- {
- error0 = VXLAN_ERROR_BAD_FLAGS;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace0;
- }
-
- if (is_ip4) {
- key4_0.src = ip4_0->src_address.as_u32;
- key4_0.vni = vxlan0->vni_reserved;
-
- /* Make sure VXLAN tunnel exist according to packet SIP and VNI */
- if (PREDICT_FALSE (key4_0.as_u64 != last_key4.as_u64))
- {
- p0 = hash_get (vxm->vxlan4_tunnel_by_key, key4_0.as_u64);
- if (PREDICT_FALSE (p0 == NULL))
- {
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace0;
- }
- last_key4.as_u64 = key4_0.as_u64;
- tunnel_index0 = last_tunnel_index = p0[0];
- }
- else
- tunnel_index0 = last_tunnel_index;
- t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0);
-
- /* Validate VXLAN tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip4_0->dst_address.as_u32 == t0->src.ip4.as_u32))
- goto next0; /* valid packet */
- if (PREDICT_FALSE (ip4_address_is_multicast (&ip4_0->dst_address)))
- {
- key4_0.src = ip4_0->dst_address.as_u32;
- key4_0.vni = vxlan0->vni_reserved;
- /* Make sure mcast VXLAN tunnel exist by packet DIP and VNI */
- p0 = hash_get (vxm->vxlan4_tunnel_by_key, key4_0.as_u64);
- if (PREDICT_TRUE (p0 != NULL))
- {
- mt0 = pool_elt_at_index (vxm->tunnels, p0[0]);
- goto next0; /* valid packet */
- }
- }
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace0;
-
- } else /* !is_ip4 */ {
- key6_0.src.as_u64[0] = ip6_0->src_address.as_u64[0];
- key6_0.src.as_u64[1] = ip6_0->src_address.as_u64[1];
- key6_0.vni = vxlan0->vni_reserved;
-
- /* Make sure VXLAN tunnel exist according to packet SIP and VNI */
- if (PREDICT_FALSE (memcmp(&key6_0, &last_key6, sizeof(last_key6)) != 0))
- {
- p0 = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6_0);
- if (PREDICT_FALSE (p0 == NULL))
- {
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace0;
- }
- clib_memcpy (&last_key6, &key6_0, sizeof(key6_0));
- tunnel_index0 = last_tunnel_index = p0[0];
- }
- else
- tunnel_index0 = last_tunnel_index;
- t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0);
-
- /* Validate VXLAN tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip6_address_is_equal (&ip6_0->dst_address,
- &t0->src.ip6)))
- goto next0; /* valid packet */
- if (PREDICT_FALSE (ip6_address_is_multicast (&ip6_0->dst_address)))
- {
- key6_0.src.as_u64[0] = ip6_0->dst_address.as_u64[0];
- key6_0.src.as_u64[1] = ip6_0->dst_address.as_u64[1];
- key6_0.vni = vxlan0->vni_reserved;
- p0 = hash_get (vxm->vxlan6_tunnel_by_key, &key6_0);
- if (PREDICT_TRUE (p0 != NULL))
- {
- mt0 = pool_elt_at_index (vxm->tunnels, p0[0]);
- goto next0; /* valid packet */
- }
- }
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace0;
- }
-
- next0:
- next0 = t0->decap_next_index;
- sw_if_index0 = t0->sw_if_index;
- len0 = vlib_buffer_length_in_chain (vm, b0);
-
- /* Required to make the l2 tag push / pop code work on l2 subifs */
- if (PREDICT_TRUE(next0 == VXLAN_INPUT_NEXT_L2_INPUT))
- vnet_update_l2_len (b0);
-
- /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
- vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0;
- sw_if_index0 = (mt0) ? mt0->sw_if_index : sw_if_index0;
-
- pkts_decapsulated ++;
- stats_n_packets += 1;
- stats_n_bytes += len0;
-
- /* Batch stats increment on the same vxlan tunnel so counter
- is not incremented per packet */
- if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
- {
- stats_n_packets -= 1;
- stats_n_bytes -= len0;
- if (stats_n_packets)
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
- cpu_index, stats_sw_if_index,
- stats_n_packets, stats_n_bytes);
- stats_n_packets = 1;
- stats_n_bytes = len0;
- stats_sw_if_index = sw_if_index0;
- }
-
- trace0:
- b0->error = error0 ? node->errors[error0] : 0;
-
- if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- vxlan_rx_trace_t *tr
- = vlib_add_trace (vm, node, b0, sizeof (*tr));
- tr->next_index = next0;
- tr->error = error0;
- tr->tunnel_index = tunnel_index0;
- tr->vni = vnet_get_vni (vxlan0);
- }
-
- if (PREDICT_FALSE (vxlan1->flags != VXLAN_FLAGS_I))
- {
- error1 = VXLAN_ERROR_BAD_FLAGS;
- next1 = VXLAN_INPUT_NEXT_DROP;
- goto trace1;
- }
-
- if (is_ip4) {
- key4_1.src = ip4_1->src_address.as_u32;
- key4_1.vni = vxlan1->vni_reserved;
-
- /* Make sure unicast VXLAN tunnel exist by packet SIP and VNI */
- if (PREDICT_FALSE (key4_1.as_u64 != last_key4.as_u64))
- {
- p1 = hash_get (vxm->vxlan4_tunnel_by_key, key4_1.as_u64);
- if (PREDICT_FALSE (p1 == NULL))
- {
- error1 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next1 = VXLAN_INPUT_NEXT_DROP;
- goto trace1;
- }
- last_key4.as_u64 = key4_1.as_u64;
- tunnel_index1 = last_tunnel_index = p1[0];
- }
- else
- tunnel_index1 = last_tunnel_index;
- t1 = pool_elt_at_index (vxm->tunnels, tunnel_index1);
-
- /* Validate VXLAN tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip4_1->dst_address.as_u32 == t1->src.ip4.as_u32))
- goto next1; /* valid packet */
- if (PREDICT_FALSE (ip4_address_is_multicast (&ip4_1->dst_address)))
- {
- key4_1.src = ip4_1->dst_address.as_u32;
- key4_1.vni = vxlan1->vni_reserved;
- /* Make sure mcast VXLAN tunnel exist by packet DIP and VNI */
- p1 = hash_get (vxm->vxlan4_tunnel_by_key, key4_1.as_u64);
- if (PREDICT_TRUE (p1 != NULL))
- {
- mt1 = pool_elt_at_index (vxm->tunnels, p1[0]);
- goto next1; /* valid packet */
- }
- }
- error1 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next1 = VXLAN_INPUT_NEXT_DROP;
- goto trace1;
-
- } else /* !is_ip4 */ {
- key6_1.src.as_u64[0] = ip6_1->src_address.as_u64[0];
- key6_1.src.as_u64[1] = ip6_1->src_address.as_u64[1];
- key6_1.vni = vxlan1->vni_reserved;
-
- /* Make sure VXLAN tunnel exist according to packet SIP and VNI */
- if (PREDICT_FALSE (memcmp(&key6_1, &last_key6, sizeof(last_key6)) != 0))
- {
- p1 = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6_1);
-
- if (PREDICT_FALSE (p1 == NULL))
- {
- error1 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next1 = VXLAN_INPUT_NEXT_DROP;
- goto trace1;
- }
-
- clib_memcpy (&last_key6, &key6_1, sizeof(key6_1));
- tunnel_index1 = last_tunnel_index = p1[0];
- }
- else
- tunnel_index1 = last_tunnel_index;
- t1 = pool_elt_at_index (vxm->tunnels, tunnel_index1);
-
- /* Validate VXLAN tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip6_address_is_equal (&ip6_1->dst_address,
- &t1->src.ip6)))
- goto next1; /* valid packet */
- if (PREDICT_FALSE (ip6_address_is_multicast (&ip6_1->dst_address)))
- {
- key6_1.src.as_u64[0] = ip6_1->dst_address.as_u64[0];
- key6_1.src.as_u64[1] = ip6_1->dst_address.as_u64[1];
- key6_1.vni = vxlan1->vni_reserved;
- p1 = hash_get (vxm->vxlan6_tunnel_by_key, &key6_1);
- if (PREDICT_TRUE (p1 != NULL))
- {
- mt1 = pool_elt_at_index (vxm->tunnels, p1[0]);
- goto next1; /* valid packet */
- }
- }
- error1 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next1 = VXLAN_INPUT_NEXT_DROP;
- goto trace1;
- }
-
- next1:
- next1 = t1->decap_next_index;
- sw_if_index1 = t1->sw_if_index;
- len1 = vlib_buffer_length_in_chain (vm, b1);
-
- /* Required to make the l2 tag push / pop code work on l2 subifs */
- if (PREDICT_TRUE(next1 == VXLAN_INPUT_NEXT_L2_INPUT))
- vnet_update_l2_len (b1);
-
- /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
- vnet_buffer(b1)->sw_if_index[VLIB_RX] = sw_if_index1;
- sw_if_index1 = (mt1) ? mt1->sw_if_index : sw_if_index1;
-
- pkts_decapsulated ++;
- stats_n_packets += 1;
- stats_n_bytes += len1;
-
- /* Batch stats increment on the same vxlan tunnel so counter
- is not incremented per packet */
- if (PREDICT_FALSE (sw_if_index1 != stats_sw_if_index))
- {
- stats_n_packets -= 1;
- stats_n_bytes -= len1;
- if (stats_n_packets)
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
- cpu_index, stats_sw_if_index,
- stats_n_packets, stats_n_bytes);
- stats_n_packets = 1;
- stats_n_bytes = len1;
- stats_sw_if_index = sw_if_index1;
- }
-
- trace1:
- b1->error = error1 ? node->errors[error1] : 0;
-
- if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
- {
- vxlan_rx_trace_t *tr
- = vlib_add_trace (vm, node, b1, sizeof (*tr));
- tr->next_index = next1;
- tr->error = error1;
- tr->tunnel_index = tunnel_index1;
- tr->vni = vnet_get_vni (vxlan1);
- }
-
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- ip4_header_t * ip4_0;
- ip6_header_t * ip6_0;
- vxlan_header_t * vxlan0;
- uword * p0;
- u32 tunnel_index0;
- vxlan_tunnel_t * t0, * mt0 = NULL;
- vxlan4_tunnel_key_t key4_0;
- vxlan6_tunnel_key_t key6_0;
- u32 error0;
- u32 sw_if_index0, len0;
-
- 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);
-
- /* udp leaves current_data pointing at the vxlan header */
- vxlan0 = vlib_buffer_get_current (b0);
- if (is_ip4) {
- vlib_buffer_advance
- (b0, -(word)(sizeof(udp_header_t)+sizeof(ip4_header_t)));
- ip4_0 = vlib_buffer_get_current (b0);
- } else {
- vlib_buffer_advance
- (b0, -(word)(sizeof(udp_header_t)+sizeof(ip6_header_t)));
- ip6_0 = vlib_buffer_get_current (b0);
- }
-
- /* pop (ip, udp, vxlan) */
- if (is_ip4) {
- vlib_buffer_advance
- (b0, sizeof(*ip4_0)+sizeof(udp_header_t)+sizeof(*vxlan0));
- } else {
- vlib_buffer_advance
- (b0, sizeof(*ip6_0)+sizeof(udp_header_t)+sizeof(*vxlan0));
- }
-
- tunnel_index0 = ~0;
- error0 = 0;
-
- if (PREDICT_FALSE (vxlan0->flags != VXLAN_FLAGS_I))
- {
- error0 = VXLAN_ERROR_BAD_FLAGS;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace00;
- }
-
- if (is_ip4) {
- key4_0.src = ip4_0->src_address.as_u32;
- key4_0.vni = vxlan0->vni_reserved;
-
- /* Make sure unicast VXLAN tunnel exist by packet SIP and VNI */
- if (PREDICT_FALSE (key4_0.as_u64 != last_key4.as_u64))
- {
- p0 = hash_get (vxm->vxlan4_tunnel_by_key, key4_0.as_u64);
- if (PREDICT_FALSE (p0 == NULL))
- {
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace00;
- }
- last_key4.as_u64 = key4_0.as_u64;
- tunnel_index0 = last_tunnel_index = p0[0];
- }
- else
- tunnel_index0 = last_tunnel_index;
- t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0);
-
- /* Validate VXLAN tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip4_0->dst_address.as_u32 == t0->src.ip4.as_u32))
- goto next00; /* valid packet */
- if (PREDICT_FALSE (ip4_address_is_multicast (&ip4_0->dst_address)))
- {
- key4_0.src = ip4_0->dst_address.as_u32;
- key4_0.vni = vxlan0->vni_reserved;
- /* Make sure mcast VXLAN tunnel exist by packet DIP and VNI */
- p0 = hash_get (vxm->vxlan4_tunnel_by_key, key4_0.as_u64);
- if (PREDICT_TRUE (p0 != NULL))
- {
- mt0 = pool_elt_at_index (vxm->tunnels, p0[0]);
- goto next00; /* valid packet */
- }
- }
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace00;
-
- } else /* !is_ip4 */ {
- key6_0.src.as_u64[0] = ip6_0->src_address.as_u64[0];
- key6_0.src.as_u64[1] = ip6_0->src_address.as_u64[1];
- key6_0.vni = vxlan0->vni_reserved;
-
- /* Make sure VXLAN tunnel exist according to packet SIP and VNI */
- if (PREDICT_FALSE (memcmp(&key6_0, &last_key6, sizeof(last_key6)) != 0))
- {
- p0 = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6_0);
- if (PREDICT_FALSE (p0 == NULL))
- {
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace00;
- }
- clib_memcpy (&last_key6, &key6_0, sizeof(key6_0));
- tunnel_index0 = last_tunnel_index = p0[0];
- }
- else
- tunnel_index0 = last_tunnel_index;
- t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0);
-
- /* Validate VXLAN tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip6_address_is_equal (&ip6_0->dst_address,
- &t0->src.ip6)))
- goto next00; /* valid packet */
- if (PREDICT_FALSE (ip6_address_is_multicast (&ip6_0->dst_address)))
- {
- key6_0.src.as_u64[0] = ip6_0->dst_address.as_u64[0];
- key6_0.src.as_u64[1] = ip6_0->dst_address.as_u64[1];
- key6_0.vni = vxlan0->vni_reserved;
- p0 = hash_get (vxm->vxlan6_tunnel_by_key, &key6_0);
- if (PREDICT_TRUE (p0 != NULL))
- {
- mt0 = pool_elt_at_index (vxm->tunnels, p0[0]);
- goto next00; /* valid packet */
- }
- }
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace00;
- }
-
- next00:
- next0 = t0->decap_next_index;
- sw_if_index0 = t0->sw_if_index;
- len0 = vlib_buffer_length_in_chain (vm, b0);
-
- /* Required to make the l2 tag push / pop code work on l2 subifs */
- if (PREDICT_TRUE(next0 == VXLAN_INPUT_NEXT_L2_INPUT))
- vnet_update_l2_len (b0);
-
- /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
- vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0;
- sw_if_index0 = (mt0) ? mt0->sw_if_index : sw_if_index0;
-
- pkts_decapsulated ++;
- stats_n_packets += 1;
- stats_n_bytes += len0;
-
- /* Batch stats increment on the same vxlan tunnel so counter
- is not incremented per packet */
- if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
- {
- stats_n_packets -= 1;
- stats_n_bytes -= len0;
- if (stats_n_packets)
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
- cpu_index, stats_sw_if_index,
- stats_n_packets, stats_n_bytes);
- stats_n_packets = 1;
- stats_n_bytes = len0;
- stats_sw_if_index = sw_if_index0;
- }
-
- trace00:
- b0->error = error0 ? node->errors[error0] : 0;
-
- if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- vxlan_rx_trace_t *tr
- = vlib_add_trace (vm, node, b0, sizeof (*tr));
- tr->next_index = next0;
- tr->error = error0;
- tr->tunnel_index = tunnel_index0;
- tr->vni = vnet_get_vni (vxlan0);
- }
- 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);
- }
- /* Do we still need this now that tunnel tx stats is kept? */
- vlib_node_increment_counter (vm, is_ip4?
- vxlan4_input_node.index:vxlan6_input_node.index,
- VXLAN_ERROR_DECAPSULATED,
- pkts_decapsulated);
-
- /* Increment any remaining batch stats */
- if (stats_n_packets)
- {
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
- cpu_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
- node->runtime_data[0] = stats_sw_if_index;
- }
-
- return from_frame->n_vectors;
-}
-
-static uword
-vxlan4_input (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return vxlan_input(vm, node, from_frame, /* is_ip4 */ 1);
-}
-
-static uword
-vxlan6_input (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return vxlan_input(vm, node, from_frame, /* is_ip4 */ 0);
-}
-
-static char * vxlan_error_strings[] = {
-#define vxlan_error(n,s) s,
-#include <vnet/vxlan/vxlan_error.def>
-#undef vxlan_error
-#undef _
-};
-
-VLIB_REGISTER_NODE (vxlan4_input_node) = {
- .function = vxlan4_input,
- .name = "vxlan4-input",
- /* Takes a vector of packets. */
- .vector_size = sizeof (u32),
-
- .n_errors = VXLAN_N_ERROR,
- .error_strings = vxlan_error_strings,
-
- .n_next_nodes = VXLAN_INPUT_N_NEXT,
- .next_nodes = {
-#define _(s,n) [VXLAN_INPUT_NEXT_##s] = n,
- foreach_vxlan_input_next
-#undef _
- },
-
-//temp .format_buffer = format_vxlan_header,
- .format_trace = format_vxlan_rx_trace,
- // $$$$ .unformat_buffer = unformat_vxlan_header,
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (vxlan4_input_node, vxlan4_input)
-
-VLIB_REGISTER_NODE (vxlan6_input_node) = {
- .function = vxlan6_input,
- .name = "vxlan6-input",
- /* Takes a vector of packets. */
- .vector_size = sizeof (u32),
-
- .n_errors = VXLAN_N_ERROR,
- .error_strings = vxlan_error_strings,
-
- .n_next_nodes = VXLAN_INPUT_N_NEXT,
- .next_nodes = {
-#define _(s,n) [VXLAN_INPUT_NEXT_##s] = n,
- foreach_vxlan_input_next
-#undef _
- },
-
-//temp .format_buffer = format_vxlan_header,
- .format_trace = format_vxlan_rx_trace,
- // $$$$ .unformat_buffer = unformat_vxlan_header,
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_input_node, vxlan6_input)
-
-
-typedef enum {
- IP_VXLAN_BYPASS_NEXT_DROP,
- IP_VXLAN_BYPASS_NEXT_VXLAN,
- IP_VXLAN_BYPASS_N_NEXT,
-} ip_vxan_bypass_next_t;
-
-always_inline uword
-ip_vxlan_bypass_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame,
- u32 is_ip4)
-{
- vxlan_main_t * vxm = &vxlan_main;
- u32 * from, * to_next, n_left_from, n_left_to_next, next_index;
- vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip4_input_node.index);
- ip4_address_t addr4; /* last IPv4 address matching a local VTEP address */
- ip6_address_t addr6; /* last IPv6 address matching a local VTEP address */
-
- 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);
-
- if (is_ip4) addr4.data_u32 = ~0;
- else ip6_address_set_zero (&addr6);
-
- 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 * b0, * b1;
- ip4_header_t * ip0, * ip1;
- udp_header_t * udp0, * udp1;
- u32 bi0, ip_len0, udp_len0, flags0, next0;
- u32 bi1, ip_len1, udp_len1, flags1, next1;
- i32 len_diff0, len_diff1;
- u8 error0, good_udp0, proto0;
- u8 error1, good_udp1, proto1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t * p2, * p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- 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);
- ip0 = vlib_buffer_get_current (b0);
- ip1 = vlib_buffer_get_current (b1);
-
- /* Setup packet for next IP feature */
- vnet_feature_next(vnet_buffer(b0)->sw_if_index[VLIB_RX], &next0, b0);
- vnet_feature_next(vnet_buffer(b1)->sw_if_index[VLIB_RX], &next1, b1);
-
- /* 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;
-
- /* Process packet 0 */
- if (proto0 != IP_PROTOCOL_UDP)
- goto exit0; /* not UDP packet */
-
- udp0 = ip4_next_header (ip0);
- if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan))
- goto exit0; /* not VXLAN packet */
-
- if (is_ip4)
- {
- if (addr4.as_u32 != ip0->dst_address.as_u32)
- {
- if (!hash_get (vxm->vtep4, ip0->dst_address.as_u32))
- goto exit0; /* no local VTEP for VXLAN packet */
- addr4 = ip0->dst_address;
- }
- }
- else goto exit0; /* IP6 VXLAN bypass not yet supported */
-
- /* vxlan-input node expect current at VXLAN header */
- vlib_buffer_advance (b0, sizeof(ip4_header_t)+sizeof(udp_header_t));
-
- flags0 = b0->flags;
- good_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
-
- /* Don't verify UDP checksum for packets with explicit zero checksum. */
- good_udp0 |= udp0->checksum == 0;
-
- /* 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;
-
- /* Verify UDP checksum */
- if (PREDICT_FALSE (!good_udp0))
- {
- if (!(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED))
- flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
- good_udp0 =
- (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
- }
-
- error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
- error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
-
- next0 = error0 ?
- IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
- b0->error = error0 ? error_node->errors[error0] : 0;
-
- exit0:
- /* Process packet 1 */
- if (proto1 != IP_PROTOCOL_UDP)
- goto exit1; /* not UDP packet */
-
- udp1 = ip4_next_header (ip1);
- if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan))
- goto exit1; /* not VXLAN packet */
-
- if (is_ip4)
- {
- if (addr4.as_u32 != ip1->dst_address.as_u32)
- {
- if (!hash_get (vxm->vtep4, ip1->dst_address.as_u32))
- goto exit1; /* no local VTEP for VXLAN packet */
- addr4 = ip1->dst_address;
- }
- }
- else goto exit1; /* IP6 VXLAN bypass not yet supported */
-
- /* vxlan-input node expect current at VXLAN header */
- vlib_buffer_advance (b1, sizeof(ip4_header_t)+sizeof(udp_header_t));
-
- flags1 = b1->flags;
- good_udp1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
-
- /* Don't verify UDP checksum for packets with explicit zero checksum. */
- good_udp1 |= udp1->checksum == 0;
-
- /* Verify UDP length */
- ip_len1 = clib_net_to_host_u16 (ip1->length);
- udp_len1 = clib_net_to_host_u16 (udp1->length);
-
- len_diff1 = ip_len1 - udp_len1;
-
- /* Verify UDP checksum */
- if (PREDICT_FALSE (!good_udp1))
- {
- if (!(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED))
- flags1 = ip4_tcp_udp_validate_checksum (vm, b1);
- good_udp1 =
- (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
- }
-
- error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM;
- error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH;
-
- next1 = error1 ?
- IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
- b1->error = error1 ? error_node->errors[error1] : 0;
-
- exit1:
- 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;
- ip4_header_t * ip0;
- udp_header_t * udp0;
- u32 bi0, ip_len0, udp_len0, flags0, next0;
- i32 len_diff0;
- u8 error0, good_udp0, proto0;
-
- bi0 = to_next[0] = from[0];
- from += 1;
- n_left_from -= 1;
- to_next += 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- ip0 = vlib_buffer_get_current (b0);
-
- /* Setup packet for next IP feature */
- vnet_feature_next(vnet_buffer(b0)->sw_if_index[VLIB_RX], &next0, b0);
-
- /* 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;
-
- if (proto0 != IP_PROTOCOL_UDP)
- goto exit; /* not UDP packet */
-
- udp0 = ip4_next_header (ip0);
- if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan))
- goto exit; /* not VXLAN packet */
-
- if (is_ip4)
- {
- if (addr4.as_u32 != ip0->dst_address.as_u32)
- {
- if (!hash_get (vxm->vtep4, ip0->dst_address.as_u32))
- goto exit; /* no local VTEP for VXLAN packet */
- addr4 = ip0->dst_address;
- }
- }
- else goto exit; /* IP6 VXLAN bypass not yet supported */
-
- /* vxlan-input node expect current at VXLAN header */
- vlib_buffer_advance (b0, sizeof(ip4_header_t)+sizeof(udp_header_t));
-
- flags0 = b0->flags;
- good_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
-
- /* Don't verify UDP checksum for packets with explicit zero checksum. */
- good_udp0 |= udp0->checksum == 0;
-
- /* 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;
-
- /* Verify UDP checksum */
- if (PREDICT_FALSE (!good_udp0))
- {
- if (!(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED))
- flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
- good_udp0 =
- (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
- }
-
- error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
- error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
-
- next0 = error0 ?
- IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
- b0->error = error0 ? error_node->errors[error0] : 0;
-
- exit:
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
-}
-
-static uword
-ip4_vxlan_bypass (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return ip_vxlan_bypass_inline (vm, node, frame, /* is_ip4 */ 1);
-}
-
-VLIB_REGISTER_NODE (ip4_vxlan_bypass_node) = {
- .function = ip4_vxlan_bypass,
- .name = "ip4-vxlan-bypass",
- .vector_size = sizeof (u32),
-
- .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
- .next_nodes = {
- [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
- [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-input",
- },
-
- .format_buffer = format_ip4_header,
- .format_trace = format_ip4_forward_next_trace,
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (ip4_vxlan_bypass_node,ip4_vxlan_bypass)
-
-
-static clib_error_t *
-set_ip_vxlan_bypass (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- unformat_input_t _line_input, * line_input = &_line_input;
- vnet_main_t * vnm = vnet_get_main();
- clib_error_t * error = 0;
- u32 sw_if_index, is_del;
-
- sw_if_index = ~0;
- is_del = 0;
-
- if (! unformat_user (input, unformat_line_input, line_input))
- return 0;
-
- while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat_user (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
- ;
- else if (unformat (line_input, "del"))
- is_del = 1;
- else
- {
- error = unformat_parse_error (line_input);
- goto done;
- }
- }
-
- if (~0 == sw_if_index)
- {
- error = clib_error_return (0, "unknown interface `%U'",
- format_unformat_error, line_input);
- goto done;
- }
-
- vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-bypass", sw_if_index,
- is_del == 0, 0, 0);
- done:
- return error;
-}
-
-/*?
- * This command adds the 'ip4-vxlan-bypass' graph node for a given interface.
- * By adding the IPv4 vxlan-bypass graph node to an interface, the node checks
- * for and validate input vxlan packet and bypass ip4-lookup, ip4-local,
- * ip4-udp-lookup nodes to speedup vxlan packet forwarding. This node will
- * cause extra overhead to for non-vxlan packets which is kept at a minimum.
- *
- * @cliexpar
- * @parblock
- * Example of graph node before ip4-vxlan-bypass is enabled:
- * @cliexstart{show vlib graph ip4-vxlan-bypass}
- * Name Next Previous
- * ip4-vxlan-bypass error-drop [0]
- * vxlan4-input [1]
- * ip4-lookup [2]
- * @cliexend
- *
- * Example of how to enable ip4-vxlan-bypass on an interface:
- * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0}
- *
- * Example of graph node after ip4-vxlan-bypass is enabled:
- * @cliexstart{show vlib graph ip4-vxlan-bypass}
- * Name Next Previous
- * ip4-vxlan-bypass error-drop [0] ip4-input
- * vxlan4-input [1] ip4-input-no-checksum
- * ip4-lookup [2]
- * @cliexend
- *
- * Example of how to display the feature enabed on an interface:
- * @cliexstart{show ip interface features GigabitEthernet2/0/0}
- * IP feature paths configured on GigabitEthernet2/0/0...
- *
- * ipv4 unicast:
- * ip4-vxlan-bypass
- * ip4-lookup
- *
- * ipv4 multicast:
- * ip4-lookup-multicast
- *
- * ipv4 multicast:
- * interface-output
- *
- * ipv6 unicast:
- * ip6-lookup
- *
- * ipv6 multicast:
- * ip6-lookup
- *
- * ipv6 multicast:
- * interface-output
- * @cliexend
- *
- * Example of how to disable unicast source checking on an interface:
- * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0 del}
- * @endparblock
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (set_interface_ip_vxlan_bypass_command, static) = {
- .path = "set interface ip vxlan-bypass",
- .function = set_ip_vxlan_bypass,
- .short_help = "set interface ip vxlan-bypass <interface> [del]",
-};
-
-/* Dummy init function to get us linked in. */
-clib_error_t * ip4_vxlan_bypass_init (vlib_main_t * vm)
-{ return 0; }
-
-VLIB_INIT_FUNCTION (ip4_vxlan_bypass_init);
Code Review / vpp.git / blobdiff