diff options
Diffstat (limited to 'src/plugins/vxlan/decap.c')
| -rw-r--r-- | src/plugins/vxlan/decap.c | 1330 |
1 files changed, 1330 insertions, 0 deletions
diff --git a/src/plugins/vxlan/decap.c b/src/plugins/vxlan/decap.c new file mode 100644 index 00000000000..f5d1efa2b86 --- /dev/null +++ b/src/plugins/vxlan/decap.c @@ -0,0 +1,1330 @@ +/* + * 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 <vxlan/vxlan.h> +#include <vnet/udp/udp_local.h> + +#ifndef CLIB_MARCH_VARIANT +__clib_export vlib_node_registration_t vxlan4_input_node; +__clib_export vlib_node_registration_t vxlan6_input_node; +#endif + +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) + return format (s, "VXLAN decap error - tunnel for vni %d does not exist", + t->vni); + return format (s, "VXLAN decap from vxlan_tunnel%d vni %d next %d error %d", + t->tunnel_index, t->vni, t->next_index, t->error); +} + +typedef vxlan4_tunnel_key_t last_tunnel_cache4; + +static const vxlan_decap_info_t decap_not_found = { + .sw_if_index = ~0, + .next_index = VXLAN_INPUT_NEXT_DROP, + .error = VXLAN_ERROR_NO_SUCH_TUNNEL +}; + +static const vxlan_decap_info_t decap_bad_flags = { + .sw_if_index = ~0, + .next_index = VXLAN_INPUT_NEXT_DROP, + .error = VXLAN_ERROR_BAD_FLAGS +}; + +always_inline vxlan_decap_info_t +vxlan4_find_tunnel (vxlan_main_t * vxm, last_tunnel_cache4 * cache, + u32 fib_index, ip4_header_t * ip4_0, + vxlan_header_t * vxlan0, u32 * stats_sw_if_index) +{ + if (PREDICT_FALSE (vxlan0->flags != VXLAN_FLAGS_I)) + return decap_bad_flags; + + /* Make sure VXLAN tunnel exist according to packet S/D IP, UDP port, VRF, + * and VNI */ + u32 dst = ip4_0->dst_address.as_u32; + u32 src = ip4_0->src_address.as_u32; + udp_header_t *udp = ip4_next_header (ip4_0); + vxlan4_tunnel_key_t key4 = { + .key[0] = ((u64) dst << 32) | src, + .key[1] = ((u64) udp->dst_port << 48) | ((u64) fib_index << 32) | + vxlan0->vni_reserved, + }; + + if (PREDICT_TRUE + (key4.key[0] == cache->key[0] && key4.key[1] == cache->key[1])) + { + /* cache hit */ + vxlan_decap_info_t di = {.as_u64 = cache->value }; + *stats_sw_if_index = di.sw_if_index; + return di; + } + + int rv = clib_bihash_search_inline_16_8 (&vxm->vxlan4_tunnel_by_key, &key4); + if (PREDICT_TRUE (rv == 0)) + { + *cache = key4; + vxlan_decap_info_t di = {.as_u64 = key4.value }; + *stats_sw_if_index = di.sw_if_index; + return di; + } + + /* try multicast */ + if (PREDICT_TRUE (!ip4_address_is_multicast (&ip4_0->dst_address))) + return decap_not_found; + + /* search for mcast decap info by mcast address */ + key4.key[0] = dst; + rv = clib_bihash_search_inline_16_8 (&vxm->vxlan4_tunnel_by_key, &key4); + if (rv != 0) + return decap_not_found; + + /* search for unicast tunnel using the mcast tunnel local(src) ip */ + vxlan_decap_info_t mdi = {.as_u64 = key4.value }; + key4.key[0] = ((u64) mdi.local_ip.as_u32 << 32) | src; + rv = clib_bihash_search_inline_16_8 (&vxm->vxlan4_tunnel_by_key, &key4); + if (PREDICT_FALSE (rv != 0)) + return decap_not_found; + + /* mcast traffic does not update the cache */ + *stats_sw_if_index = mdi.sw_if_index; + vxlan_decap_info_t di = {.as_u64 = key4.value }; + return di; +} + +typedef vxlan6_tunnel_key_t last_tunnel_cache6; + +always_inline vxlan_decap_info_t +vxlan6_find_tunnel (vxlan_main_t * vxm, last_tunnel_cache6 * cache, + u32 fib_index, ip6_header_t * ip6_0, + vxlan_header_t * vxlan0, u32 * stats_sw_if_index) +{ + if (PREDICT_FALSE (vxlan0->flags != VXLAN_FLAGS_I)) + return decap_bad_flags; + + /* Make sure VXLAN tunnel exist according to packet SIP, UDP port, VRF, and + * VNI */ + udp_header_t *udp = ip6_next_header (ip6_0); + vxlan6_tunnel_key_t key6 = { + .key[0] = ip6_0->src_address.as_u64[0], + .key[1] = ip6_0->src_address.as_u64[1], + .key[2] = ((u64) udp->dst_port << 48) | ((u64) fib_index << 32) | + vxlan0->vni_reserved, + }; + + if (PREDICT_FALSE + (clib_bihash_key_compare_24_8 (key6.key, cache->key) == 0)) + { + int rv = + clib_bihash_search_inline_24_8 (&vxm->vxlan6_tunnel_by_key, &key6); + if (PREDICT_FALSE (rv != 0)) + return decap_not_found; + + *cache = key6; + } + vxlan_tunnel_t *t0 = pool_elt_at_index (vxm->tunnels, cache->value); + + /* Validate VXLAN tunnel SIP against packet DIP */ + if (PREDICT_TRUE (ip6_address_is_equal (&ip6_0->dst_address, &t0->src.ip6))) + *stats_sw_if_index = t0->sw_if_index; + else + { + /* try multicast */ + if (PREDICT_TRUE (!ip6_address_is_multicast (&ip6_0->dst_address))) + return decap_not_found; + + /* Make sure mcast VXLAN tunnel exist by packet DIP and VNI */ + key6.key[0] = ip6_0->dst_address.as_u64[0]; + key6.key[1] = ip6_0->dst_address.as_u64[1]; + int rv = + clib_bihash_search_inline_24_8 (&vxm->vxlan6_tunnel_by_key, &key6); + if (PREDICT_FALSE (rv != 0)) + return decap_not_found; + + vxlan_tunnel_t *mcast_t0 = pool_elt_at_index (vxm->tunnels, key6.value); + *stats_sw_if_index = mcast_t0->sw_if_index; + } + + vxlan_decap_info_t di = { + .sw_if_index = t0->sw_if_index, + .next_index = t0->decap_next_index, + }; + return di; +} + +always_inline uword +vxlan_input (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame, u32 is_ip4) +{ + vxlan_main_t *vxm = &vxlan_main; + vnet_main_t *vnm = vxm->vnet_main; + vnet_interface_main_t *im = &vnm->interface_main; + vlib_combined_counter_main_t *rx_counter = + im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX; + last_tunnel_cache4 last4; + last_tunnel_cache6 last6; + u32 pkts_dropped = 0; + u32 thread_index = vlib_get_thread_index (); + + if (is_ip4) + clib_memset (&last4, 0xff, sizeof last4); + else + clib_memset (&last6, 0xff, sizeof last6); + + u32 *from = vlib_frame_vector_args (from_frame); + u32 n_left_from = from_frame->n_vectors; + + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; + vlib_get_buffers (vm, from, bufs, n_left_from); + + u32 stats_if0 = ~0, stats_if1 = ~0; + u16 nexts[VLIB_FRAME_SIZE], *next = nexts; + while (n_left_from >= 4) + { + /* Prefetch next iteration. */ + vlib_prefetch_buffer_header (b[2], LOAD); + vlib_prefetch_buffer_header (b[3], LOAD); + + /* udp leaves current_data pointing at the vxlan header */ + void *cur0 = vlib_buffer_get_current (b[0]); + void *cur1 = vlib_buffer_get_current (b[1]); + vxlan_header_t *vxlan0 = cur0; + vxlan_header_t *vxlan1 = cur1; + + + ip4_header_t *ip4_0, *ip4_1; + ip6_header_t *ip6_0, *ip6_1; + if (is_ip4) + { + ip4_0 = cur0 - sizeof (udp_header_t) - sizeof (ip4_header_t); + ip4_1 = cur1 - sizeof (udp_header_t) - sizeof (ip4_header_t); + } + else + { + ip6_0 = cur0 - sizeof (udp_header_t) - sizeof (ip6_header_t); + ip6_1 = cur1 - sizeof (udp_header_t) - sizeof (ip6_header_t); + } + + /* pop vxlan */ + vlib_buffer_advance (b[0], sizeof *vxlan0); + vlib_buffer_advance (b[1], sizeof *vxlan1); + + u32 fi0 = vlib_buffer_get_ip_fib_index (b[0], is_ip4); + u32 fi1 = vlib_buffer_get_ip_fib_index (b[1], is_ip4); + + vxlan_decap_info_t di0 = is_ip4 ? + vxlan4_find_tunnel (vxm, &last4, fi0, ip4_0, vxlan0, &stats_if0) : + vxlan6_find_tunnel (vxm, &last6, fi0, ip6_0, vxlan0, &stats_if0); + vxlan_decap_info_t di1 = is_ip4 ? + vxlan4_find_tunnel (vxm, &last4, fi1, ip4_1, vxlan1, &stats_if1) : + vxlan6_find_tunnel (vxm, &last6, fi1, ip6_1, vxlan1, &stats_if1); + + /* Prefetch next iteration. */ + clib_prefetch_load (b[2]->data); + clib_prefetch_load (b[3]->data); + + u32 len0 = vlib_buffer_length_in_chain (vm, b[0]); + u32 len1 = vlib_buffer_length_in_chain (vm, b[1]); + + next[0] = di0.next_index; + next[1] = di1.next_index; + + u8 any_error = di0.error | di1.error; + if (PREDICT_TRUE (any_error == 0)) + { + /* Required to make the l2 tag push / pop code work on l2 subifs */ + vnet_update_l2_len (b[0]); + vnet_update_l2_len (b[1]); + /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */ + vnet_buffer (b[0])->sw_if_index[VLIB_RX] = di0.sw_if_index; + vnet_buffer (b[1])->sw_if_index[VLIB_RX] = di1.sw_if_index; + vlib_increment_combined_counter (rx_counter, thread_index, + stats_if0, 1, len0); + vlib_increment_combined_counter (rx_counter, thread_index, + stats_if1, 1, len1); + } + else + { + if (di0.error == 0) + { + vnet_update_l2_len (b[0]); + vnet_buffer (b[0])->sw_if_index[VLIB_RX] = di0.sw_if_index; + vlib_increment_combined_counter (rx_counter, thread_index, + stats_if0, 1, len0); + } + else + { + b[0]->error = node->errors[di0.error]; + pkts_dropped++; + } + + if (di1.error == 0) + { + vnet_update_l2_len (b[1]); + vnet_buffer (b[1])->sw_if_index[VLIB_RX] = di1.sw_if_index; + vlib_increment_combined_counter (rx_counter, thread_index, + stats_if1, 1, len1); + } + else + { + b[1]->error = node->errors[di1.error]; + pkts_dropped++; + } + } + + if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) + { + vxlan_rx_trace_t *tr = + vlib_add_trace (vm, node, b[0], sizeof (*tr)); + tr->next_index = next[0]; + tr->error = di0.error; + tr->tunnel_index = di0.sw_if_index == ~0 ? + ~0 : vxm->tunnel_index_by_sw_if_index[di0.sw_if_index]; + tr->vni = vnet_get_vni (vxlan0); + } + if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED)) + { + vxlan_rx_trace_t *tr = + vlib_add_trace (vm, node, b[1], sizeof (*tr)); + tr->next_index = next[1]; + tr->error = di1.error; + tr->tunnel_index = di1.sw_if_index == ~0 ? + ~0 : vxm->tunnel_index_by_sw_if_index[di1.sw_if_index]; + tr->vni = vnet_get_vni (vxlan1); + } + b += 2; + next += 2; + n_left_from -= 2; + } + + while (n_left_from > 0) + { + /* udp leaves current_data pointing at the vxlan header */ + void *cur0 = vlib_buffer_get_current (b[0]); + vxlan_header_t *vxlan0 = cur0; + ip4_header_t *ip4_0; + ip6_header_t *ip6_0; + if (is_ip4) + ip4_0 = cur0 - sizeof (udp_header_t) - sizeof (ip4_header_t); + else + ip6_0 = cur0 - sizeof (udp_header_t) - sizeof (ip6_header_t); + + /* pop (ip, udp, vxlan) */ + vlib_buffer_advance (b[0], sizeof (*vxlan0)); + + u32 fi0 = vlib_buffer_get_ip_fib_index (b[0], is_ip4); + + vxlan_decap_info_t di0 = is_ip4 ? + vxlan4_find_tunnel (vxm, &last4, fi0, ip4_0, vxlan0, &stats_if0) : + vxlan6_find_tunnel (vxm, &last6, fi0, ip6_0, vxlan0, &stats_if0); + + uword len0 = vlib_buffer_length_in_chain (vm, b[0]); + + next[0] = di0.next_index; + + /* Validate VXLAN tunnel encap-fib index against packet */ + if (di0.error == 0) + { + /* Required to make the l2 tag push / pop code work on l2 subifs */ + vnet_update_l2_len (b[0]); + + /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */ + vnet_buffer (b[0])->sw_if_index[VLIB_RX] = di0.sw_if_index; + + vlib_increment_combined_counter (rx_counter, thread_index, + stats_if0, 1, len0); + } + else + { + b[0]->error = node->errors[di0.error]; + pkts_dropped++; + } + + if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) + { + vxlan_rx_trace_t *tr + = vlib_add_trace (vm, node, b[0], sizeof (*tr)); + tr->next_index = next[0]; + tr->error = di0.error; + tr->tunnel_index = di0.sw_if_index == ~0 ? + ~0 : vxm->tunnel_index_by_sw_if_index[di0.sw_if_index]; + tr->vni = vnet_get_vni (vxlan0); + } + b += 1; + next += 1; + n_left_from -= 1; + } + vlib_buffer_enqueue_to_next (vm, node, from, nexts, from_frame->n_vectors); + /* Do we still need this now that tunnel tx stats is kept? */ + u32 node_idx = is_ip4 ? vxlan4_input_node.index : vxlan6_input_node.index; + vlib_node_increment_counter (vm, node_idx, VXLAN_ERROR_DECAPSULATED, + from_frame->n_vectors - pkts_dropped); + + return from_frame->n_vectors; +} + +VLIB_NODE_FN (vxlan4_input_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return vxlan_input (vm, node, from_frame, /* is_ip4 */ 1); +} + +VLIB_NODE_FN (vxlan6_input_node) (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 <vxlan/vxlan_error.def> +#undef vxlan_error +}; + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (vxlan4_input_node) = +{ + .name = "vxlan4-input", + .vector_size = sizeof (u32), + .n_errors = VXLAN_N_ERROR, + .error_strings = vxlan_error_strings, + .n_next_nodes = VXLAN_INPUT_N_NEXT, + .format_trace = format_vxlan_rx_trace, + .next_nodes = { +#define _(s,n) [VXLAN_INPUT_NEXT_##s] = n, + foreach_vxlan_input_next +#undef _ + }, +}; + +VLIB_REGISTER_NODE (vxlan6_input_node) = +{ + .name = "vxlan6-input", + .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 _ + }, + .format_trace = format_vxlan_rx_trace, +}; +/* *INDENT-ON* */ + +typedef enum +{ + IP_VXLAN_BYPASS_NEXT_DROP, + IP_VXLAN_BYPASS_NEXT_VXLAN, + IP_VXLAN_BYPASS_N_NEXT, +} ip_vxlan_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); + vtep4_key_t last_vtep4; /* last IPv4 address / fib index + matching a local VTEP address */ + vtep6_key_t last_vtep6; /* last IPv6 address / fib index + matching a local VTEP address */ + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; + + last_tunnel_cache4 last4; + last_tunnel_cache6 last6; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + vlib_get_buffers (vm, from, bufs, n_left_from); + + if (node->flags & VLIB_NODE_FLAG_TRACE) + ip4_forward_next_trace (vm, node, frame, VLIB_TX); + + if (is_ip4) + { + vtep4_key_init (&last_vtep4); + clib_memset (&last4, 0xff, sizeof last4); + } + else + { + vtep6_key_init (&last_vtep6); + clib_memset (&last6, 0xff, sizeof last6); + } + + 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 *ip40, *ip41; + ip6_header_t *ip60, *ip61; + udp_header_t *udp0, *udp1; + vxlan_header_t *vxlan0, *vxlan1; + 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; + u32 stats_if0 = ~0, stats_if1 = ~0; + + /* Prefetch next iteration. */ + { + vlib_prefetch_buffer_header (b[2], LOAD); + vlib_prefetch_buffer_header (b[3], LOAD); + + CLIB_PREFETCH (b[2]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (b[3]->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 = b[0]; + b1 = b[1]; + b += 2; + if (is_ip4) + { + ip40 = vlib_buffer_get_current (b0); + ip41 = vlib_buffer_get_current (b1); + } + else + { + ip60 = vlib_buffer_get_current (b0); + ip61 = vlib_buffer_get_current (b1); + } + + /* Setup packet for next IP feature */ + vnet_feature_next (&next0, b0); + vnet_feature_next (&next1, b1); + + if (is_ip4) + { + /* Treat IP frag packets as "experimental" protocol for now + until support of IP frag reassembly is implemented */ + proto0 = ip4_is_fragment (ip40) ? 0xfe : ip40->protocol; + proto1 = ip4_is_fragment (ip41) ? 0xfe : ip41->protocol; + } + else + { + proto0 = ip60->protocol; + proto1 = ip61->protocol; + } + + /* Process packet 0 */ + if (proto0 != IP_PROTOCOL_UDP) + goto exit0; /* not UDP packet */ + + if (is_ip4) + udp0 = ip4_next_header (ip40); + else + udp0 = ip6_next_header (ip60); + + u32 fi0 = vlib_buffer_get_ip_fib_index (b0, is_ip4); + vxlan0 = vlib_buffer_get_current (b0) + sizeof (udp_header_t) + + sizeof (ip4_header_t); + + vxlan_decap_info_t di0 = + is_ip4 ? + vxlan4_find_tunnel (vxm, &last4, fi0, ip40, vxlan0, &stats_if0) : + vxlan6_find_tunnel (vxm, &last6, fi0, ip60, vxlan0, &stats_if0); + + if (PREDICT_FALSE (di0.sw_if_index == ~0)) + goto exit0; /* unknown interface */ + + /* Validate DIP against VTEPs */ + if (is_ip4) + { +#ifdef CLIB_HAVE_VEC512 + if (!vtep4_check_vector (&vxm->vtep_table, b0, ip40, &last_vtep4, + &vxm->vtep4_u512)) +#else + if (!vtep4_check (&vxm->vtep_table, b0, ip40, &last_vtep4)) +#endif + goto exit0; /* no local VTEP for VXLAN packet */ + } + else + { + if (!vtep6_check (&vxm->vtep_table, b0, ip60, &last_vtep6)) + goto exit0; /* no local VTEP for VXLAN packet */ + } + + flags0 = b0->flags; + good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp0 |= udp0->checksum == 0; + + /* Verify UDP length */ + if (is_ip4) + ip_len0 = clib_net_to_host_u16 (ip40->length); + else + ip_len0 = clib_net_to_host_u16 (ip60->payload_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 (is_ip4) + flags0 = ip4_tcp_udp_validate_checksum (vm, b0); + else + flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0); + good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + } + + if (is_ip4) + { + error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH; + } + else + { + error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH; + } + + next0 = error0 ? + IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN; + b0->error = error0 ? error_node->errors[error0] : 0; + + /* vxlan-input node expect current at VXLAN header */ + if (is_ip4) + vlib_buffer_advance (b0, + sizeof (ip4_header_t) + + sizeof (udp_header_t)); + else + vlib_buffer_advance (b0, + sizeof (ip6_header_t) + + sizeof (udp_header_t)); + + exit0: + /* Process packet 1 */ + if (proto1 != IP_PROTOCOL_UDP) + goto exit1; /* not UDP packet */ + + if (is_ip4) + udp1 = ip4_next_header (ip41); + else + udp1 = ip6_next_header (ip61); + + u32 fi1 = vlib_buffer_get_ip_fib_index (b1, is_ip4); + vxlan1 = vlib_buffer_get_current (b1) + sizeof (udp_header_t) + + sizeof (ip4_header_t); + + vxlan_decap_info_t di1 = + is_ip4 ? + vxlan4_find_tunnel (vxm, &last4, fi1, ip41, vxlan1, &stats_if1) : + vxlan6_find_tunnel (vxm, &last6, fi1, ip61, vxlan1, &stats_if1); + + if (PREDICT_FALSE (di1.sw_if_index == ~0)) + goto exit1; /* unknown interface */ + + /* Validate DIP against VTEPs */ + if (is_ip4) + { +#ifdef CLIB_HAVE_VEC512 + if (!vtep4_check_vector (&vxm->vtep_table, b1, ip41, &last_vtep4, + &vxm->vtep4_u512)) +#else + if (!vtep4_check (&vxm->vtep_table, b1, ip41, &last_vtep4)) +#endif + goto exit1; /* no local VTEP for VXLAN packet */ + } + else + { + if (!vtep6_check (&vxm->vtep_table, b1, ip61, &last_vtep6)) + goto exit1; /* no local VTEP for VXLAN packet */ + } + + flags1 = b1->flags; + good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp1 |= udp1->checksum == 0; + + /* Verify UDP length */ + if (is_ip4) + ip_len1 = clib_net_to_host_u16 (ip41->length); + else + ip_len1 = clib_net_to_host_u16 (ip61->payload_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 (is_ip4) + flags1 = ip4_tcp_udp_validate_checksum (vm, b1); + else + flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, b1); + good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + } + + if (is_ip4) + { + error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM; + error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH; + } + else + { + error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM; + error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH; + } + + next1 = error1 ? + IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN; + b1->error = error1 ? error_node->errors[error1] : 0; + + /* vxlan-input node expect current at VXLAN header */ + if (is_ip4) + vlib_buffer_advance (b1, + sizeof (ip4_header_t) + + sizeof (udp_header_t)); + else + vlib_buffer_advance (b1, + sizeof (ip6_header_t) + + sizeof (udp_header_t)); + + 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 *ip40; + ip6_header_t *ip60; + udp_header_t *udp0; + vxlan_header_t *vxlan0; + u32 bi0, ip_len0, udp_len0, flags0, next0; + i32 len_diff0; + u8 error0, good_udp0, proto0; + u32 stats_if0 = ~0; + + bi0 = to_next[0] = from[0]; + from += 1; + n_left_from -= 1; + to_next += 1; + n_left_to_next -= 1; + + b0 = b[0]; + b++; + if (is_ip4) + ip40 = vlib_buffer_get_current (b0); + else + ip60 = vlib_buffer_get_current (b0); + + /* Setup packet for next IP feature */ + vnet_feature_next (&next0, b0); + + if (is_ip4) + /* Treat IP4 frag packets as "experimental" protocol for now + until support of IP frag reassembly is implemented */ + proto0 = ip4_is_fragment (ip40) ? 0xfe : ip40->protocol; + else + proto0 = ip60->protocol; + + if (proto0 != IP_PROTOCOL_UDP) + goto exit; /* not UDP packet */ + + if (is_ip4) + udp0 = ip4_next_header (ip40); + else + udp0 = ip6_next_header (ip60); + + u32 fi0 = vlib_buffer_get_ip_fib_index (b0, is_ip4); + vxlan0 = vlib_buffer_get_current (b0) + sizeof (udp_header_t) + + sizeof (ip4_header_t); + + vxlan_decap_info_t di0 = + is_ip4 ? + vxlan4_find_tunnel (vxm, &last4, fi0, ip40, vxlan0, &stats_if0) : + vxlan6_find_tunnel (vxm, &last6, fi0, ip60, vxlan0, &stats_if0); + + if (PREDICT_FALSE (di0.sw_if_index == ~0)) + goto exit; /* unknown interface */ + + /* Validate DIP against VTEPs */ + if (is_ip4) + { +#ifdef CLIB_HAVE_VEC512 + if (!vtep4_check_vector (&vxm->vtep_table, b0, ip40, &last_vtep4, + &vxm->vtep4_u512)) +#else + if (!vtep4_check (&vxm->vtep_table, b0, ip40, &last_vtep4)) +#endif + goto exit; /* no local VTEP for VXLAN packet */ + } + else + { + if (!vtep6_check (&vxm->vtep_table, b0, ip60, &last_vtep6)) + goto exit; /* no local VTEP for VXLAN packet */ + } + + flags0 = b0->flags; + good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp0 |= udp0->checksum == 0; + + /* Verify UDP length */ + if (is_ip4) + ip_len0 = clib_net_to_host_u16 (ip40->length); + else + ip_len0 = clib_net_to_host_u16 (ip60->payload_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 (is_ip4) + flags0 = ip4_tcp_udp_validate_checksum (vm, b0); + else + flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0); + good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + } + + if (is_ip4) + { + error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH; + } + else + { + error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH; + } + + next0 = error0 ? + IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN; + b0->error = error0 ? error_node->errors[error0] : 0; + + /* vxlan-input node expect current at VXLAN header */ + if (is_ip4) + vlib_buffer_advance (b0, + sizeof (ip4_header_t) + + sizeof (udp_header_t)); + else + vlib_buffer_advance (b0, + sizeof (ip6_header_t) + + sizeof (udp_header_t)); + + 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; +} + +VLIB_NODE_FN (ip4_vxlan_bypass_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return ip_vxlan_bypass_inline (vm, node, frame, /* is_ip4 */ 1); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip4_vxlan_bypass_node) = +{ + .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, +}; + +/* *INDENT-ON* */ + +/* Dummy init function to get us linked in. */ +static clib_error_t * +ip4_vxlan_bypass_init (vlib_main_t * vm) +{ + return 0; +} + +VLIB_INIT_FUNCTION (ip4_vxlan_bypass_init); + +VLIB_NODE_FN (ip6_vxlan_bypass_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return ip_vxlan_bypass_inline (vm, node, frame, /* is_ip4 */ 0); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip6_vxlan_bypass_node) = +{ + .name = "ip6-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] = "vxlan6-input", + }, + .format_buffer = format_ip6_header, + .format_trace = format_ip6_forward_next_trace, +}; + +/* *INDENT-ON* */ + +/* Dummy init function to get us linked in. */ +static clib_error_t * +ip6_vxlan_bypass_init (vlib_main_t * vm) +{ + return 0; +} + +VLIB_INIT_FUNCTION (ip6_vxlan_bypass_init); + +#define foreach_vxlan_flow_input_next \ +_(DROP, "error-drop") \ +_(L2_INPUT, "l2-input") + +typedef enum +{ +#define _(s,n) VXLAN_FLOW_NEXT_##s, + foreach_vxlan_flow_input_next +#undef _ + VXLAN_FLOW_N_NEXT, +} vxlan_flow_input_next_t; + +#define foreach_vxlan_flow_error \ + _(NONE, "no error") \ + _(IP_CHECKSUM_ERROR, "Rx ip checksum errors") \ + _(IP_HEADER_ERROR, "Rx ip header errors") \ + _(UDP_CHECKSUM_ERROR, "Rx udp checksum errors") \ + _(UDP_LENGTH_ERROR, "Rx udp length errors") + +typedef enum +{ +#define _(f,s) VXLAN_FLOW_ERROR_##f, + foreach_vxlan_flow_error +#undef _ + VXLAN_FLOW_N_ERROR, +} vxlan_flow_error_t; + +static char *vxlan_flow_error_strings[] = { +#define _(n,s) s, + foreach_vxlan_flow_error +#undef _ +}; + + +static_always_inline u8 +vxlan_validate_udp_csum (vlib_main_t * vm, vlib_buffer_t * b) +{ + u32 flags = b->flags; + enum + { offset = + sizeof (ip4_header_t) + sizeof (udp_header_t) + sizeof (vxlan_header_t), + }; + + /* Verify UDP checksum */ + if ((flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0) + { + vlib_buffer_advance (b, -offset); + flags = ip4_tcp_udp_validate_checksum (vm, b); + vlib_buffer_advance (b, offset); + } + + return (flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; +} + +static_always_inline u8 +vxlan_check_udp_csum (vlib_main_t * vm, vlib_buffer_t * b) +{ + ip4_vxlan_header_t *hdr = vlib_buffer_get_current (b) - sizeof *hdr; + udp_header_t *udp = &hdr->udp; + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + u8 good_csum = (b->flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0 || + udp->checksum == 0; + + return !good_csum; +} + +static_always_inline u8 +vxlan_check_ip (vlib_buffer_t * b, u16 payload_len) +{ + ip4_vxlan_header_t *hdr = vlib_buffer_get_current (b) - sizeof *hdr; + u16 ip_len = clib_net_to_host_u16 (hdr->ip4.length); + u16 expected = payload_len + sizeof *hdr; + return ip_len > expected || hdr->ip4.ttl == 0 + || hdr->ip4.ip_version_and_header_length != 0x45; +} + +static_always_inline u8 +vxlan_check_ip_udp_len (vlib_buffer_t * b) +{ + ip4_vxlan_header_t *hdr = vlib_buffer_get_current (b) - sizeof *hdr; + u16 ip_len = clib_net_to_host_u16 (hdr->ip4.length); + u16 udp_len = clib_net_to_host_u16 (hdr->udp.length); + return udp_len > ip_len; +} + +static_always_inline u8 +vxlan_err_code (u8 ip_err0, u8 udp_err0, u8 csum_err0) +{ + u8 error0 = VXLAN_FLOW_ERROR_NONE; + if (ip_err0) + error0 = VXLAN_FLOW_ERROR_IP_HEADER_ERROR; + if (udp_err0) + error0 = VXLAN_FLOW_ERROR_UDP_LENGTH_ERROR; + if (csum_err0) + error0 = VXLAN_FLOW_ERROR_UDP_CHECKSUM_ERROR; + return error0; +} + +VLIB_NODE_FN (vxlan4_flow_input_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * f) +{ + enum + { payload_offset = sizeof (ip4_vxlan_header_t) }; + + vxlan_main_t *vxm = &vxlan_main; + vnet_interface_main_t *im = &vnet_main.interface_main; + vlib_combined_counter_main_t *rx_counter[VXLAN_FLOW_N_NEXT] = { + [VXLAN_FLOW_NEXT_DROP] = + im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_DROP, + [VXLAN_FLOW_NEXT_L2_INPUT] = + im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, + }; + u32 thread_index = vlib_get_thread_index (); + + u32 *from = vlib_frame_vector_args (f); + u32 n_left_from = f->n_vectors; + u32 next_index = VXLAN_FLOW_NEXT_L2_INPUT; + + while (n_left_from > 0) + { + u32 n_left_to_next, *to_next; + + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while (n_left_from > 3 && n_left_to_next > 3) + { + u32 bi0 = to_next[0] = from[0]; + u32 bi1 = to_next[1] = from[1]; + u32 bi2 = to_next[2] = from[2]; + u32 bi3 = to_next[3] = from[3]; + from += 4; + n_left_from -= 4; + to_next += 4; + n_left_to_next -= 4; + + vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0); + vlib_buffer_t *b1 = vlib_get_buffer (vm, bi1); + vlib_buffer_t *b2 = vlib_get_buffer (vm, bi2); + vlib_buffer_t *b3 = vlib_get_buffer (vm, bi3); + + vlib_buffer_advance (b0, payload_offset); + vlib_buffer_advance (b1, payload_offset); + vlib_buffer_advance (b2, payload_offset); + vlib_buffer_advance (b3, payload_offset); + + u16 len0 = vlib_buffer_length_in_chain (vm, b0); + u16 len1 = vlib_buffer_length_in_chain (vm, b1); + u16 len2 = vlib_buffer_length_in_chain (vm, b2); + u16 len3 = vlib_buffer_length_in_chain (vm, b3); + + u32 next0 = VXLAN_FLOW_NEXT_L2_INPUT, next1 = + VXLAN_FLOW_NEXT_L2_INPUT, next2 = + VXLAN_FLOW_NEXT_L2_INPUT, next3 = VXLAN_FLOW_NEXT_L2_INPUT; + + u8 ip_err0 = vxlan_check_ip (b0, len0); + u8 ip_err1 = vxlan_check_ip (b1, len1); + u8 ip_err2 = vxlan_check_ip (b2, len2); + u8 ip_err3 = vxlan_check_ip (b3, len3); + u8 ip_err = ip_err0 | ip_err1 | ip_err2 | ip_err3; + + u8 udp_err0 = vxlan_check_ip_udp_len (b0); + u8 udp_err1 = vxlan_check_ip_udp_len (b1); + u8 udp_err2 = vxlan_check_ip_udp_len (b2); + u8 udp_err3 = vxlan_check_ip_udp_len (b3); + u8 udp_err = udp_err0 | udp_err1 | udp_err2 | udp_err3; + + u8 csum_err0 = vxlan_check_udp_csum (vm, b0); + u8 csum_err1 = vxlan_check_udp_csum (vm, b1); + u8 csum_err2 = vxlan_check_udp_csum (vm, b2); + u8 csum_err3 = vxlan_check_udp_csum (vm, b3); + u8 csum_err = csum_err0 | csum_err1 | csum_err2 | csum_err3; + + if (PREDICT_FALSE (csum_err)) + { + if (csum_err0) + csum_err0 = !vxlan_validate_udp_csum (vm, b0); + if (csum_err1) + csum_err1 = !vxlan_validate_udp_csum (vm, b1); + if (csum_err2) + csum_err2 = !vxlan_validate_udp_csum (vm, b2); + if (csum_err3) + csum_err3 = !vxlan_validate_udp_csum (vm, b3); + csum_err = csum_err0 | csum_err1 | csum_err2 | csum_err3; + } + + if (PREDICT_FALSE (ip_err || udp_err || csum_err)) + { + if (ip_err0 || udp_err0 || csum_err0) + { + next0 = VXLAN_FLOW_NEXT_DROP; + u8 error0 = vxlan_err_code (ip_err0, udp_err0, csum_err0); + b0->error = node->errors[error0]; + } + if (ip_err1 || udp_err1 || csum_err1) + { + next1 = VXLAN_FLOW_NEXT_DROP; + u8 error1 = vxlan_err_code (ip_err1, udp_err1, csum_err1); + b1->error = node->errors[error1]; + } + if (ip_err2 || udp_err2 || csum_err2) + { + next2 = VXLAN_FLOW_NEXT_DROP; + u8 error2 = vxlan_err_code (ip_err2, udp_err2, csum_err2); + b2->error = node->errors[error2]; + } + if (ip_err3 || udp_err3 || csum_err3) + { + next3 = VXLAN_FLOW_NEXT_DROP; + u8 error3 = vxlan_err_code (ip_err3, udp_err3, csum_err3); + b3->error = node->errors[error3]; + } + } + + vnet_update_l2_len (b0); + vnet_update_l2_len (b1); + vnet_update_l2_len (b2); + vnet_update_l2_len (b3); + + ASSERT (b0->flow_id != 0); + ASSERT (b1->flow_id != 0); + ASSERT (b2->flow_id != 0); + ASSERT (b3->flow_id != 0); + + u32 t_index0 = b0->flow_id - vxm->flow_id_start; + u32 t_index1 = b1->flow_id - vxm->flow_id_start; + u32 t_index2 = b2->flow_id - vxm->flow_id_start; + u32 t_index3 = b3->flow_id - vxm->flow_id_start; + + vxlan_tunnel_t *t0 = &vxm->tunnels[t_index0]; + vxlan_tunnel_t *t1 = &vxm->tunnels[t_index1]; + vxlan_tunnel_t *t2 = &vxm->tunnels[t_index2]; + vxlan_tunnel_t *t3 = &vxm->tunnels[t_index3]; + + /* flow id consumed */ + b0->flow_id = 0; + b1->flow_id = 0; + b2->flow_id = 0; + b3->flow_id = 0; + + u32 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX] = + t0->sw_if_index; + u32 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX] = + t1->sw_if_index; + u32 sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_RX] = + t2->sw_if_index; + u32 sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_RX] = + t3->sw_if_index; + + vlib_increment_combined_counter (rx_counter[next0], thread_index, + sw_if_index0, 1, len0); + vlib_increment_combined_counter (rx_counter[next1], thread_index, + sw_if_index1, 1, len1); + vlib_increment_combined_counter (rx_counter[next2], thread_index, + sw_if_index2, 1, len2); + vlib_increment_combined_counter (rx_counter[next3], thread_index, + sw_if_index3, 1, len3); + + u32 flags = b0->flags | b1->flags | b2->flags | b3->flags; + + if (PREDICT_FALSE (flags & VLIB_BUFFER_IS_TRACED)) + { + if (b0->flags & VLIB_BUFFER_IS_TRACED) + { + vxlan_rx_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof *tr); + u8 error0 = vxlan_err_code (ip_err0, udp_err0, csum_err0); + tr->next_index = next0; + tr->error = error0; + tr->tunnel_index = t_index0; + tr->vni = t0->vni; + } + if (b1->flags & VLIB_BUFFER_IS_TRACED) + { + vxlan_rx_trace_t *tr = + vlib_add_trace (vm, node, b1, sizeof *tr); + u8 error1 = vxlan_err_code (ip_err1, udp_err1, csum_err1); + tr->next_index = next1; + tr->error = error1; + tr->tunnel_index = t_index1; + tr->vni = t1->vni; + } + if (b2->flags & VLIB_BUFFER_IS_TRACED) + { + vxlan_rx_trace_t *tr = + vlib_add_trace (vm, node, b2, sizeof *tr); + u8 error2 = vxlan_err_code (ip_err2, udp_err2, csum_err2); + tr->next_index = next2; + tr->error = error2; + tr->tunnel_index = t_index2; + tr->vni = t2->vni; + } + if (b3->flags & VLIB_BUFFER_IS_TRACED) + { + vxlan_rx_trace_t *tr = + vlib_add_trace (vm, node, b3, sizeof *tr); + u8 error3 = vxlan_err_code (ip_err3, udp_err3, csum_err3); + tr->next_index = next3; + tr->error = error3; + tr->tunnel_index = t_index3; + tr->vni = t3->vni; + } + } + vlib_validate_buffer_enqueue_x4 + (vm, node, next_index, to_next, n_left_to_next, + bi0, bi1, bi2, bi3, next0, next1, next2, next3); + } + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0 = to_next[0] = from[0]; + from++; + n_left_from--; + to_next++; + n_left_to_next--; + + vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0); + vlib_buffer_advance (b0, payload_offset); + + u16 len0 = vlib_buffer_length_in_chain (vm, b0); + u32 next0 = VXLAN_FLOW_NEXT_L2_INPUT; + + u8 ip_err0 = vxlan_check_ip (b0, len0); + u8 udp_err0 = vxlan_check_ip_udp_len (b0); + u8 csum_err0 = vxlan_check_udp_csum (vm, b0); + + if (csum_err0) + csum_err0 = !vxlan_validate_udp_csum (vm, b0); + if (ip_err0 || udp_err0 || csum_err0) + { + next0 = VXLAN_FLOW_NEXT_DROP; + u8 error0 = vxlan_err_code (ip_err0, udp_err0, csum_err0); + b0->error = node->errors[error0]; + } + + vnet_update_l2_len (b0); + + ASSERT (b0->flow_id != 0); + u32 t_index0 = b0->flow_id - vxm->flow_id_start; + vxlan_tunnel_t *t0 = &vxm->tunnels[t_index0]; + b0->flow_id = 0; + + u32 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX] = + t0->sw_if_index; + vlib_increment_combined_counter (rx_counter[next0], thread_index, + sw_if_index0, 1, len0); + + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + vxlan_rx_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof *tr); + u8 error0 = vxlan_err_code (ip_err0, udp_err0, csum_err0); + tr->next_index = next0; + tr->error = error0; + tr->tunnel_index = t_index0; + tr->vni = t0->vni; + } + 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 f->n_vectors; +} + +/* *INDENT-OFF* */ +#ifndef CLIB_MULTIARCH_VARIANT +VLIB_REGISTER_NODE (vxlan4_flow_input_node) = { + .name = "vxlan-flow-input", + .type = VLIB_NODE_TYPE_INTERNAL, + .vector_size = sizeof (u32), + + .format_trace = format_vxlan_rx_trace, + + .n_errors = VXLAN_FLOW_N_ERROR, + .error_strings = vxlan_flow_error_strings, + + .n_next_nodes = VXLAN_FLOW_N_NEXT, + .next_nodes = { +#define _(s,n) [VXLAN_FLOW_NEXT_##s] = n, + foreach_vxlan_flow_input_next +#undef _ + }, +}; +#endif +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |