| /* |
| * decap.c - decapsulate VXLAN GPE |
| * |
| * 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. |
| */ |
| /** |
| * @file |
| * @brief Functions for decapsulating VXLAN GPE tunnels |
| * |
| */ |
| |
| #include <vlib/vlib.h> |
| #include <vnet/pg/pg.h> |
| #include <vnet/vxlan-gpe/vxlan_gpe.h> |
| |
| vlib_node_registration_t vxlan_gpe_input_node; |
| |
| /** |
| * @brief Struct for VXLAN GPE decap packet tracing |
| * |
| */ |
| typedef struct { |
| u32 next_index; |
| u32 tunnel_index; |
| u32 error; |
| } vxlan_gpe_rx_trace_t; |
| |
| /** |
| * @brief Tracing function for VXLAN GPE packet decapsulation |
| * |
| * @param *s |
| * @param *args |
| * |
| * @return *s |
| * |
| */ |
| static u8 * format_vxlan_gpe_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_gpe_rx_trace_t * t = va_arg (*args, vxlan_gpe_rx_trace_t *); |
| |
| if (t->tunnel_index != ~0) |
| { |
| s = format (s, "VXLAN-GPE: tunnel %d next %d error %d", t->tunnel_index, |
| t->next_index, t->error); |
| } |
| else |
| { |
| s = format (s, "VXLAN-GPE: no tunnel next %d error %d\n", t->next_index, |
| t->error); |
| } |
| return s; |
| } |
| |
| /** |
| * @brief Tracing function for VXLAN GPE packet decapsulation including length |
| * |
| * @param *s |
| * @param *args |
| * |
| * @return *s |
| * |
| */ |
| static u8 * format_vxlan_gpe_with_length (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 *); |
| |
| |
| return s; |
| } |
| |
| /** |
| * @brief Common processing for IPv4 and IPv6 VXLAN GPE decap dispatch functions |
| * |
| * It is worth noting that other than trivial UDP forwarding (transit), VXLAN GPE |
| * tunnels are "terminate local". This means that there is no "TX" interface for this |
| * decap case, so that field in the buffer_metadata can be "used for something else". |
| * The something else in this case is, for the IPv4/IPv6 inner-packet type case, the |
| * FIB index used to look up the inner-packet's adjacency. |
| * |
| * vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index; |
| * |
| * @param *vm |
| * @param *node |
| * @param *from_frame |
| * @param is_ip4 |
| * |
| * @return from_frame->n_vectors |
| * |
| */ |
| always_inline uword |
| vxlan_gpe_input (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * from_frame, |
| u8 is_ip4) |
| { |
| u32 n_left_from, next_index, *from, *to_next; |
| vxlan_gpe_main_t * nngm = &vxlan_gpe_main; |
| vnet_main_t * vnm = nngm->vnet_main; |
| vnet_interface_main_t * im = &vnm->interface_main; |
| u32 last_tunnel_index = ~0; |
| vxlan4_gpe_tunnel_key_t last_key4; |
| vxlan6_gpe_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) |
| memset (&last_key4, 0xff, sizeof(last_key4)); |
| 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_vxlan_gpe_header_t * iuvn4_0, *iuvn4_1; |
| ip6_vxlan_gpe_header_t * iuvn6_0, *iuvn6_1; |
| uword * p0, *p1; |
| u32 tunnel_index0, tunnel_index1; |
| vxlan_gpe_tunnel_t * t0, *t1; |
| vxlan4_gpe_tunnel_key_t key4_0, key4_1; |
| vxlan6_gpe_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); |
| |
| if (is_ip4) |
| { |
| /* udp leaves current_data pointing at the vxlan-gpe header */ |
| 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))); |
| |
| iuvn4_0 = vlib_buffer_get_current (b0); |
| iuvn4_1 = vlib_buffer_get_current (b1); |
| |
| /* pop (ip, udp, vxlan) */ |
| vlib_buffer_advance (b0, sizeof(*iuvn4_0)); |
| vlib_buffer_advance (b1, sizeof(*iuvn4_1)); |
| } |
| else |
| { |
| /* udp leaves current_data pointing at the vxlan-gpe header */ |
| 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))); |
| |
| iuvn6_0 = vlib_buffer_get_current (b0); |
| iuvn6_1 = vlib_buffer_get_current (b1); |
| |
| /* pop (ip, udp, vxlan) */ |
| vlib_buffer_advance (b0, sizeof(*iuvn6_0)); |
| vlib_buffer_advance (b1, sizeof(*iuvn6_1)); |
| } |
| |
| tunnel_index0 = ~0; |
| tunnel_index1 = ~0; |
| error0 = 0; |
| error1 = 0; |
| |
| if (is_ip4) |
| { |
| next0 = |
| (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)? |
| nngm->decap_next_node_list[iuvn4_0->vxlan.protocol]: \ |
| VXLAN_GPE_INPUT_NEXT_DROP; |
| next1 = |
| (iuvn4_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)? |
| nngm->decap_next_node_list[iuvn4_1->vxlan.protocol]: \ |
| VXLAN_GPE_INPUT_NEXT_DROP; |
| |
| key4_0.local = iuvn4_0->ip4.dst_address.as_u32; |
| key4_1.local = iuvn4_1->ip4.dst_address.as_u32; |
| |
| key4_0.remote = iuvn4_0->ip4.src_address.as_u32; |
| key4_1.remote = iuvn4_1->ip4.src_address.as_u32; |
| |
| key4_0.vni = iuvn4_0->vxlan.vni_res; |
| key4_1.vni = iuvn4_1->vxlan.vni_res; |
| |
| key4_0.pad = 0; |
| key4_1.pad = 0; |
| } |
| else /* is_ip6 */ |
| { |
| next0 = (iuvn6_0->vxlan.protocol < node->n_next_nodes) ? |
| iuvn6_0->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP; |
| next1 = (iuvn6_1->vxlan.protocol < node->n_next_nodes) ? |
| iuvn6_1->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP; |
| |
| key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0]; |
| key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1]; |
| key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0]; |
| key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1]; |
| |
| key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0]; |
| key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1]; |
| key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0]; |
| key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1]; |
| |
| key6_0.vni = iuvn6_0->vxlan.vni_res; |
| key6_1.vni = iuvn6_1->vxlan.vni_res; |
| } |
| |
| /* Processing packet 0*/ |
| if (is_ip4) |
| { |
| /* Processing for key4_0 */ |
| if (PREDICT_FALSE((key4_0.as_u64[0] != last_key4.as_u64[0]) |
| || (key4_0.as_u64[1] != last_key4.as_u64[1]))) |
| { |
| p0 = hash_get_mem(nngm->vxlan4_gpe_tunnel_by_key, &key4_0); |
| |
| if (p0 == 0) |
| { |
| error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL; |
| goto trace0; |
| } |
| |
| last_key4.as_u64[0] = key4_0.as_u64[0]; |
| last_key4.as_u64[1] = key4_0.as_u64[1]; |
| tunnel_index0 = last_tunnel_index = p0[0]; |
| } |
| else |
| tunnel_index0 = last_tunnel_index; |
| } |
| else /* is_ip6 */ |
| { |
| next0 = |
| (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)? |
| nngm->decap_next_node_list[iuvn6_0->vxlan.protocol]: \ |
| VXLAN_GPE_INPUT_NEXT_DROP; |
| next1 = |
| (iuvn6_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)? |
| nngm->decap_next_node_list[iuvn6_1->vxlan.protocol]: \ |
| VXLAN_GPE_INPUT_NEXT_DROP; |
| |
| key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0]; |
| key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1]; |
| key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0]; |
| key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1]; |
| |
| key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0]; |
| key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1]; |
| key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0]; |
| key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1]; |
| |
| key6_0.vni = iuvn6_0->vxlan.vni_res; |
| key6_1.vni = iuvn6_1->vxlan.vni_res; |
| |
| /* Processing for key6_0 */ |
| if (PREDICT_FALSE(memcmp (&key6_0, &last_key6, sizeof(last_key6)) != 0)) |
| { |
| p0 = hash_get_mem(nngm->vxlan6_gpe_tunnel_by_key, &key6_0); |
| |
| if (p0 == 0) |
| { |
| error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL; |
| goto trace0; |
| } |
| |
| 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(nngm->tunnels, tunnel_index0); |
| |
| |
| 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 */ |
| vnet_update_l2_len (b0); |
| |
| /** |
| * ip[46] lookup in the configured FIB |
| */ |
| vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index; |
| |
| pkts_decapsulated++; |
| stats_n_packets += 1; |
| stats_n_bytes += len0; |
| |
| 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_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof(*tr)); |
| tr->next_index = next0; |
| tr->error = error0; |
| tr->tunnel_index = tunnel_index0; |
| } |
| |
| /* Process packet 1 */ |
| if (is_ip4) |
| { |
| /* Processing for key4_1 */ |
| if (PREDICT_FALSE( |
| (key4_1.as_u64[0] != last_key4.as_u64[0]) |
| || (key4_1.as_u64[1] != last_key4.as_u64[1]))) |
| { |
| p1 = hash_get_mem(nngm->vxlan4_gpe_tunnel_by_key, &key4_1); |
| |
| if (p1 == 0) |
| { |
| error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL; |
| goto trace1; |
| } |
| |
| last_key4.as_u64[0] = key4_1.as_u64[0]; |
| last_key4.as_u64[1] = key4_1.as_u64[1]; |
| tunnel_index1 = last_tunnel_index = p1[0]; |
| } |
| else |
| tunnel_index1 = last_tunnel_index; |
| } |
| else /* is_ip6 */ |
| { |
| /* Processing for key6_1 */ |
| if (PREDICT_FALSE(memcmp (&key6_1, &last_key6, sizeof(last_key6)) != 0)) |
| { |
| p1 = hash_get_mem(nngm->vxlan6_gpe_tunnel_by_key, &key6_1); |
| |
| if (p1 == 0) |
| { |
| error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL; |
| goto trace1; |
| } |
| |
| 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(nngm->tunnels, tunnel_index1); |
| |
| 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 */ |
| vnet_update_l2_len (b1); |
| |
| /* |
| * ip[46] lookup in the configured FIB |
| */ |
| vnet_buffer(b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index; |
| |
| 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; |
| } |
| vnet_buffer(b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index; |
| |
| trace1: b1->error = error1 ? node->errors[error1] : 0; |
| |
| if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED)) |
| { |
| vxlan_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof(*tr)); |
| tr->next_index = next1; |
| tr->error = error1; |
| tr->tunnel_index = tunnel_index1; |
| } |
| |
| 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_vxlan_gpe_header_t * iuvn4_0; |
| ip6_vxlan_gpe_header_t * iuvn6_0; |
| uword * p0; |
| u32 tunnel_index0; |
| vxlan_gpe_tunnel_t * t0; |
| vxlan4_gpe_tunnel_key_t key4_0; |
| vxlan6_gpe_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); |
| |
| if (is_ip4) |
| { |
| /* udp leaves current_data pointing at the vxlan-gpe header */ |
| vlib_buffer_advance ( |
| b0, -(word) (sizeof(udp_header_t) + sizeof(ip4_header_t))); |
| |
| iuvn4_0 = vlib_buffer_get_current (b0); |
| |
| /* pop (ip, udp, vxlan) */ |
| vlib_buffer_advance (b0, sizeof(*iuvn4_0)); |
| } |
| else |
| { |
| /* udp leaves current_data pointing at the vxlan-gpe header */ |
| vlib_buffer_advance ( |
| b0, -(word) (sizeof(udp_header_t) + sizeof(ip6_header_t))); |
| |
| iuvn6_0 = vlib_buffer_get_current (b0); |
| |
| /* pop (ip, udp, vxlan) */ |
| vlib_buffer_advance (b0, sizeof(*iuvn6_0)); |
| } |
| |
| tunnel_index0 = ~0; |
| error0 = 0; |
| |
| if (is_ip4) |
| { |
| next0 = |
| (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)? |
| nngm->decap_next_node_list[iuvn4_0->vxlan.protocol]: \ |
| VXLAN_GPE_INPUT_NEXT_DROP; |
| |
| key4_0.local = iuvn4_0->ip4.dst_address.as_u32; |
| key4_0.remote = iuvn4_0->ip4.src_address.as_u32; |
| key4_0.vni = iuvn4_0->vxlan.vni_res; |
| key4_0.pad = 0; |
| |
| /* Processing for key4_0 */ |
| if (PREDICT_FALSE( |
| (key4_0.as_u64[0] != last_key4.as_u64[0]) |
| || (key4_0.as_u64[1] != last_key4.as_u64[1]))) |
| { |
| p0 = hash_get_mem(nngm->vxlan4_gpe_tunnel_by_key, &key4_0); |
| |
| if (p0 == 0) |
| { |
| error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL; |
| goto trace00; |
| } |
| |
| last_key4.as_u64[0] = key4_0.as_u64[0]; |
| last_key4.as_u64[1] = key4_0.as_u64[1]; |
| tunnel_index0 = last_tunnel_index = p0[0]; |
| } |
| else |
| tunnel_index0 = last_tunnel_index; |
| } |
| else /* is_ip6 */ |
| { |
| next0 = |
| (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX)? |
| nngm->decap_next_node_list[iuvn6_0->vxlan.protocol]: \ |
| VXLAN_GPE_INPUT_NEXT_DROP; |
| |
| key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0]; |
| key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1]; |
| key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0]; |
| key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1]; |
| key6_0.vni = iuvn6_0->vxlan.vni_res; |
| |
| /* Processing for key6_0 */ |
| if (PREDICT_FALSE(memcmp (&key6_0, &last_key6, sizeof(last_key6)) != 0)) |
| { |
| p0 = hash_get_mem(nngm->vxlan6_gpe_tunnel_by_key, &key6_0); |
| |
| if (p0 == 0) |
| { |
| error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL; |
| goto trace00; |
| } |
| |
| 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(nngm->tunnels, tunnel_index0); |
| |
| |
| 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 */ |
| vnet_update_l2_len (b0); |
| |
| /* |
| * ip[46] lookup in the configured FIB |
| */ |
| vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index; |
| |
| pkts_decapsulated++; |
| stats_n_packets += 1; |
| stats_n_bytes += len0; |
| |
| /* Batch stats increment on the same vxlan-gpe 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_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof(*tr)); |
| tr->next_index = next0; |
| tr->error = error0; |
| tr->tunnel_index = tunnel_index0; |
| } |
| vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, |
| n_left_to_next, bi0, next0); |
| } |
| |
| vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| } |
| vlib_node_increment_counter (vm, vxlan_gpe_input_node.index, |
| VXLAN_GPE_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; |
| } |
| |
| /** |
| * @brief Graph processing dispatch function for IPv4 VXLAN GPE |
| * |
| * @node vxlan4-gpe-input |
| * @param *vm |
| * @param *node |
| * @param *from_frame |
| * |
| * @return from_frame->n_vectors |
| * |
| */ |
| static uword |
| vxlan4_gpe_input (vlib_main_t * vm, vlib_node_runtime_t * node, |
| vlib_frame_t * from_frame) |
| { |
| return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */1); |
| } |
| |
| |
| void |
| vxlan_gpe_register_decap_protocol (u8 protocol_id, uword next_node_index) |
| { |
| vxlan_gpe_main_t *hm = &vxlan_gpe_main; |
| hm->decap_next_node_list[protocol_id] = next_node_index; |
| return; |
| } |
| |
| void |
| vxlan_gpe_unregister_decap_protocol (u8 protocol_id, uword next_node_index) |
| { |
| vxlan_gpe_main_t *hm = &vxlan_gpe_main; |
| hm->decap_next_node_list[protocol_id] = VXLAN_GPE_INPUT_NEXT_DROP; |
| return; |
| } |
| |
| |
| /** |
| * @brief Graph processing dispatch function for IPv6 VXLAN GPE |
| * |
| * @node vxlan6-gpe-input |
| * @param *vm |
| * @param *node |
| * @param *from_frame |
| * |
| * @return from_frame->n_vectors - uword |
| * |
| */ |
| static uword |
| vxlan6_gpe_input (vlib_main_t * vm, vlib_node_runtime_t * node, |
| vlib_frame_t * from_frame) |
| { |
| return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */0); |
| } |
| |
| /** |
| * @brief VXLAN GPE error strings |
| */ |
| static char * vxlan_gpe_error_strings[] = { |
| #define vxlan_gpe_error(n,s) s, |
| #include <vnet/vxlan-gpe/vxlan_gpe_error.def> |
| #undef vxlan_gpe_error |
| #undef _ |
| }; |
| |
| VLIB_REGISTER_NODE (vxlan4_gpe_input_node) = { |
| .function = vxlan4_gpe_input, |
| .name = "vxlan4-gpe-input", |
| /* Takes a vector of packets. */ |
| .vector_size = sizeof (u32), |
| .type = VLIB_NODE_TYPE_INTERNAL, |
| .n_errors = ARRAY_LEN(vxlan_gpe_error_strings), |
| .error_strings = vxlan_gpe_error_strings, |
| |
| .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT, |
| .next_nodes = { |
| #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n, |
| foreach_vxlan_gpe_input_next |
| #undef _ |
| }, |
| |
| .format_buffer = format_vxlan_gpe_with_length, |
| .format_trace = format_vxlan_gpe_rx_trace, |
| // $$$$ .unformat_buffer = unformat_vxlan_gpe_header, |
| }; |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (vxlan4_gpe_input_node, vxlan4_gpe_input); |
| |
| VLIB_REGISTER_NODE (vxlan6_gpe_input_node) = { |
| .function = vxlan6_gpe_input, |
| .name = "vxlan6-gpe-input", |
| /* Takes a vector of packets. */ |
| .vector_size = sizeof (u32), |
| .type = VLIB_NODE_TYPE_INTERNAL, |
| .n_errors = ARRAY_LEN(vxlan_gpe_error_strings), |
| .error_strings = vxlan_gpe_error_strings, |
| |
| .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT, |
| .next_nodes = { |
| #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n, |
| foreach_vxlan_gpe_input_next |
| #undef _ |
| }, |
| |
| .format_buffer = format_vxlan_gpe_with_length, |
| .format_trace = format_vxlan_gpe_rx_trace, |
| // $$$$ .unformat_buffer = unformat_vxlan_gpe_header, |
| }; |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_gpe_input_node, vxlan6_gpe_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_gpe_bypass_inline (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame, |
| u32 is_ip4) |
| { |
| vxlan_gpe_main_t * ngm = &vxlan_gpe_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) |
| { |
| proto0 = ip40->protocol; |
| proto1 = 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_GPE)) |
| goto exit0; /* not VXLAN packet */ |
| |
| /* Validate DIP against VTEPs*/ |
| if (is_ip4) |
| { |
| if (addr4.as_u32 != ip40->dst_address.as_u32) |
| { |
| if (!hash_get (ngm->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 (ngm->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_gpe-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_GPE)) |
| goto exit1; /* not VXLAN packet */ |
| |
| /* Validate DIP against VTEPs*/ |
| if (is_ip4) |
| { |
| if (addr4.as_u32 != ip41->dst_address.as_u32) |
| { |
| if (!hash_get (ngm->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 (ngm->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_gpe-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) |
| proto0 = 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_GPE)) |
| goto exit; /* not VXLAN packet */ |
| |
| /* Validate DIP against VTEPs*/ |
| if (is_ip4) |
| { |
| if (addr4.as_u32 != ip40->dst_address.as_u32) |
| { |
| if (!hash_get (ngm->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 (ngm->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_gpe-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_gpe_bypass (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame) |
| { |
| return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 1); |
| } |
| |
| VLIB_REGISTER_NODE (ip4_vxlan_gpe_bypass_node) = { |
| .function = ip4_vxlan_gpe_bypass, |
| .name = "ip4-vxlan-gpe-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-gpe-input", |
| }, |
| |
| .format_buffer = format_ip4_header, |
| .format_trace = format_ip4_forward_next_trace, |
| }; |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (ip4_vxlan_gpe_bypass_node,ip4_vxlan_gpe_bypass) |
| |
| /* Dummy init function to get us linked in. */ |
| clib_error_t * ip4_vxlan_gpe_bypass_init (vlib_main_t * vm) |
| { return 0; } |
| |
| VLIB_INIT_FUNCTION (ip4_vxlan_gpe_bypass_init); |
| |
| static uword |
| ip6_vxlan_gpe_bypass (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame) |
| { |
| return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 0); |
| } |
| |
| VLIB_REGISTER_NODE (ip6_vxlan_gpe_bypass_node) = { |
| .function = ip6_vxlan_gpe_bypass, |
| .name = "ip6-vxlan-gpe-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-gpe-input", |
| }, |
| |
| .format_buffer = format_ip6_header, |
| .format_trace = format_ip6_forward_next_trace, |
| }; |
| |
| VLIB_NODE_FUNCTION_MULTIARCH (ip6_vxlan_gpe_bypass_node,ip6_vxlan_gpe_bypass) |
| |
| /* Dummy init function to get us linked in. */ |
| clib_error_t * ip6_vxlan_gpe_bypass_init (vlib_main_t * vm) |
| { return 0; } |
| |
| VLIB_INIT_FUNCTION (ip6_vxlan_gpe_bypass_init); |