diff options
Diffstat (limited to 'src/vnet/vxlan/decap.c')
| -rw-r--r-- | src/vnet/vxlan/decap.c | 1239 |
1 files changed, 1239 insertions, 0 deletions
diff --git a/src/vnet/vxlan/decap.c b/src/vnet/vxlan/decap.c new file mode 100644 index 00000000..0dc89d3f --- /dev/null +++ b/src/vnet/vxlan/decap.c @@ -0,0 +1,1239 @@ +/* + * 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 u32 +validate_vxlan_fib (vlib_buffer_t *b, vxlan_tunnel_t *t, u32 is_ip4) +{ + u32 fib_index, sw_if_index; + + sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; + + if (is_ip4) + fib_index = (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? + vec_elt (ip4_main.fib_index_by_sw_if_index, sw_if_index) : + vnet_buffer (b)->sw_if_index[VLIB_TX]; + else + fib_index = (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? + vec_elt (ip6_main.fib_index_by_sw_if_index, sw_if_index) : + vnet_buffer (b)->sw_if_index[VLIB_TX]; + + return (fib_index == t->encap_fib_index); +} + +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 thread_index = vlib_get_thread_index(); + 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 encap-fib index agaist packet */ + if (PREDICT_FALSE (validate_vxlan_fib (b0, t0, is_ip4) == 0)) + { + error0 = VXLAN_ERROR_NO_SUCH_TUNNEL; + next0 = VXLAN_INPUT_NEXT_DROP; + goto trace0; + } + + /* 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 encap-fib index agaist packet */ + if (PREDICT_FALSE (validate_vxlan_fib (b0, t0, is_ip4) == 0)) + { + error0 = VXLAN_ERROR_NO_SUCH_TUNNEL; + next0 = VXLAN_INPUT_NEXT_DROP; + goto trace0; + } + + /* 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_mem (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, + thread_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 encap-fib index agaist packet */ + if (PREDICT_FALSE (validate_vxlan_fib (b1, t1, is_ip4) == 0)) + { + error1 = VXLAN_ERROR_NO_SUCH_TUNNEL; + next1 = VXLAN_INPUT_NEXT_DROP; + goto trace1; + } + + /* 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 encap-fib index agaist packet */ + if (PREDICT_FALSE (validate_vxlan_fib (b1, t1, is_ip4) == 0)) + { + error1 = VXLAN_ERROR_NO_SUCH_TUNNEL; + next1 = VXLAN_INPUT_NEXT_DROP; + goto trace1; + } + + /* 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_mem (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, + thread_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 encap-fib index agaist packet */ + if (PREDICT_FALSE (validate_vxlan_fib (b0, t0, is_ip4) == 0)) + { + error0 = VXLAN_ERROR_NO_SUCH_TUNNEL; + next0 = VXLAN_INPUT_NEXT_DROP; + goto trace00; + } + + /* 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 encap-fib index agaist packet */ + if (PREDICT_FALSE (validate_vxlan_fib (b0, t0, is_ip4) == 0)) + { + error0 = VXLAN_ERROR_NO_SUCH_TUNNEL; + next0 = VXLAN_INPUT_NEXT_DROP; + goto trace00; + } + + /* 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_mem (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, + thread_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, + thread_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 * ip40, * ip41; + ip6_header_t * ip60, * ip61; + 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); + 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(vnet_buffer(b0)->sw_if_index[VLIB_RX], &next0, b0); + vnet_feature_next(vnet_buffer(b1)->sw_if_index[VLIB_RX], &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); + + if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan)) + goto exit0; /* not VXLAN packet */ + + /* Validate DIP against VTEPs*/ + if (is_ip4) + { + if (addr4.as_u32 != ip40->dst_address.as_u32) + { + if (!hash_get (vxm->vtep4, ip40->dst_address.as_u32)) + goto exit0; /* no local VTEP for VXLAN packet */ + addr4 = ip40->dst_address; + } + } + else + { + if (!ip6_address_is_equal (&addr6, &ip60->dst_address)) + { + if (!hash_get_mem (vxm->vtep6, &ip60->dst_address)) + goto exit0; /* no local VTEP for VXLAN packet */ + addr6 = ip60->dst_address; + } + } + + 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 ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0) + { + 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); + + if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan)) + goto exit1; /* not VXLAN packet */ + + /* Validate DIP against VTEPs*/ + if (is_ip4) + { + if (addr4.as_u32 != ip41->dst_address.as_u32) + { + if (!hash_get (vxm->vtep4, ip41->dst_address.as_u32)) + goto exit1; /* no local VTEP for VXLAN packet */ + addr4 = ip41->dst_address; + } + } + else + { + if (!ip6_address_is_equal (&addr6, &ip61->dst_address)) + { + if (!hash_get_mem (vxm->vtep6, &ip61->dst_address)) + goto exit1; /* no local VTEP for VXLAN packet */ + addr6 = ip61->dst_address; + } + } + + 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 ((flags1 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0) + { + 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; + 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); + 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(vnet_buffer(b0)->sw_if_index[VLIB_RX], &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); + + if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan)) + goto exit; /* not VXLAN packet */ + + /* Validate DIP against VTEPs*/ + if (is_ip4) + { + if (addr4.as_u32 != ip40->dst_address.as_u32) + { + if (!hash_get (vxm->vtep4, ip40->dst_address.as_u32)) + goto exit; /* no local VTEP for VXLAN packet */ + addr4 = ip40->dst_address; + } + } + else + { + if (!ip6_address_is_equal (&addr6, &ip60->dst_address)) + { + if (!hash_get_mem (vxm->vtep6, &ip60->dst_address)) + goto exit; /* no local VTEP for VXLAN packet */ + addr6 = ip60->dst_address; + } + } + + 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 ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0) + { + 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; +} + +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) + +/* 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); + +static uword +ip6_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 */ 0); +} + +VLIB_REGISTER_NODE (ip6_vxlan_bypass_node) = { + .function = ip6_vxlan_bypass, + .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, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (ip6_vxlan_bypass_node,ip6_vxlan_bypass) + +/* Dummy init function to get us linked in. */ +clib_error_t * ip6_vxlan_bypass_init (vlib_main_t * vm) +{ return 0; } + +VLIB_INIT_FUNCTION (ip6_vxlan_bypass_init); |