| /* |
| * 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); |