diff options
Diffstat (limited to 'src/plugins/vxlan-gpe/decap.c')
| -rw-r--r-- | src/plugins/vxlan-gpe/decap.c | 1167 |
1 files changed, 1167 insertions, 0 deletions
diff --git a/src/plugins/vxlan-gpe/decap.c b/src/plugins/vxlan-gpe/decap.c new file mode 100644 index 00000000000..29f03e3b380 --- /dev/null +++ b/src/plugins/vxlan-gpe/decap.c @@ -0,0 +1,1167 @@ +/* + * 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/udp/udp_local.h> +#include <vxlan-gpe/vxlan_gpe.h> + +/** + * @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; +} + +typedef struct +{ + vxlan4_gpe_tunnel_key_t key; + vxlan_gpe_decap_info_t val; +} vxlan4_gpe_tunnel_cache_t; + +static const vxlan_gpe_decap_info_t decap_not_found = { + .tunnel_index = ~0, + .next_index = VXLAN_GPE_INPUT_NEXT_DROP, + .error = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL +}; + +always_inline vxlan_gpe_decap_info_t +vxlan4_gpe_find_tunnel (vxlan_gpe_main_t *nngm, + vxlan4_gpe_tunnel_cache_t *cache, + ip4_vxlan_gpe_header_t *iuvn4_0) +{ + /* Make sure VXLAN GPE tunnel exist according to packet S/D IP, UDP port and + * VNI */ + vxlan4_gpe_tunnel_key_t key4 = { + .local = iuvn4_0->ip4.dst_address.as_u32, + .remote = iuvn4_0->ip4.src_address.as_u32, + .vni = iuvn4_0->vxlan.vni_res, + .port = (u32) iuvn4_0->udp.dst_port, + }; + + if (PREDICT_TRUE (key4.as_u64[0] == cache->key.as_u64[0] && + key4.as_u64[1] == cache->key.as_u64[1])) + { + /* cache hit */ + return cache->val; + } + + uword *p = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4); + if (PREDICT_TRUE (p != 0)) + { + u32 next = (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ? + nngm->decap_next_node_list[iuvn4_0->vxlan.protocol] : + VXLAN_GPE_INPUT_NEXT_DROP; + + cache->key.as_u64[0] = key4.as_u64[0]; + cache->key.as_u64[1] = key4.as_u64[1]; + + cache->val.error = 0; + cache->val.tunnel_index = p[0]; + cache->val.next_index = next; + + return cache->val; + } + + return decap_not_found; +} + +typedef struct +{ + vxlan6_gpe_tunnel_key_t key; + vxlan_gpe_decap_info_t val; +} vxlan6_gpe_tunnel_cache_t; + +always_inline vxlan_gpe_decap_info_t +vxlan6_gpe_find_tunnel (vxlan_gpe_main_t *nngm, + vxlan6_gpe_tunnel_cache_t *cache, + ip6_vxlan_gpe_header_t *iuvn6_0) +{ + /* Make sure VXLAN GPE tunnel exist according to packet S/D IP, UDP port and + * VNI */ + vxlan6_gpe_tunnel_key_t key6; + + ip6_address_copy (&key6.local, &iuvn6_0->ip6.dst_address); + ip6_address_copy (&key6.remote, &iuvn6_0->ip6.src_address); + key6.vni = iuvn6_0->vxlan.vni_res; + key6.port = iuvn6_0->udp.dst_port; + + if (PREDICT_TRUE (memcmp (&key6, &cache->key, sizeof (cache->key)) == 0)) + { + /* cache hit */ + return cache->val; + } + + uword *p = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6); + if (PREDICT_TRUE (p != 0)) + { + u32 next = (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ? + nngm->decap_next_node_list[iuvn6_0->vxlan.protocol] : + VXLAN_GPE_INPUT_NEXT_DROP; + + clib_memcpy_fast (&cache->key, &key6, sizeof (key6)); + cache->val.error = 0; + cache->val.tunnel_index = p[0]; + cache->val.next_index = next; + + return cache->val; + } + + return decap_not_found; +} + +/** + * @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; + vxlan4_gpe_tunnel_cache_t last4; + vxlan6_gpe_tunnel_cache_t last6; + u32 pkts_decapsulated = 0; + u32 thread_index = vm->thread_index; + u32 stats_sw_if_index, stats_n_packets, stats_n_bytes; + + if (is_ip4) + clib_memset (&last4, 0xff, sizeof (last4)); + else + clib_memset (&last6, 0xff, sizeof (last6)); + + 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; + vxlan_gpe_decap_info_t di0, di1; + vxlan_gpe_tunnel_t *t0, *t1; + 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)); + + di0 = vxlan4_gpe_find_tunnel (nngm, &last4, iuvn4_0); + di1 = vxlan4_gpe_find_tunnel (nngm, &last4, 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)); + + di0 = vxlan6_gpe_find_tunnel (nngm, &last6, iuvn6_0); + di1 = vxlan6_gpe_find_tunnel (nngm, &last6, iuvn6_1); + } + + /* Process packet 0 */ + next0 = di0.next_index; + error0 = di0.error; + if (error0 != 0) + { + goto trace0; + } + + t0 = pool_elt_at_index (nngm->tunnels, di0.tunnel_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 */ + 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] = t0->sw_if_index; + + /** + * 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 = di0.tunnel_index; + } + + /* Process packet 1 */ + next1 = di1.next_index; + error1 = di1.error; + if (error1 != 0) + { + goto trace1; + } + + t1 = pool_elt_at_index (nngm->tunnels, di1.tunnel_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 */ + 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] = t1->sw_if_index; + + /* + * 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 = di1.tunnel_index; + } + + 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; + vxlan_gpe_decap_info_t di0; + vxlan_gpe_tunnel_t *t0; + 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)); + + di0 = vxlan4_gpe_find_tunnel (nngm, &last4, 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)); + + di0 = vxlan6_gpe_find_tunnel (nngm, &last6, iuvn6_0); + } + + next0 = di0.next_index; + error0 = di0.error; + if (error0 != 0) + { + goto trace00; + } + + t0 = pool_elt_at_index (nngm->tunnels, di0.tunnel_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 */ + 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] = t0->sw_if_index; + + /* + * 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 = di0.tunnel_index; + } + 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, + is_ip4 ? vxlan4_gpe_input_node.index : + vxlan6_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 + * + */ +VLIB_NODE_FN (vxlan4_gpe_input_node) (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); +} + +#ifndef CLIB_MARCH_VARIANT +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; +} +#endif /* CLIB_MARCH_VARIANT */ + +/** + * @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 + * + */ +VLIB_NODE_FN (vxlan6_gpe_input_node) (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 <vxlan-gpe/vxlan_gpe_error.def> +#undef vxlan_gpe_error +#undef _ +}; + +VLIB_REGISTER_NODE (vxlan4_gpe_input_node) = { + .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, + // $$$$ .unformat_buffer = unformat_vxlan_gpe_header, +}; + +VLIB_REGISTER_NODE (vxlan6_gpe_input_node) = { + .name = "vxlan6-gpe-input", + /* Takes a vector of packets. */ + .vector_size = sizeof (u32), + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN(vxlan_gpe_error_strings), + .error_strings = vxlan_gpe_error_strings, + + .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT, + .next_nodes = { +#define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n, + foreach_vxlan_gpe_input_next +#undef _ + }, + + .format_buffer = format_vxlan_gpe_with_length, + .format_trace = format_vxlan_gpe_rx_trace, + // $$$$ .unformat_buffer = unformat_vxlan_gpe_header, +}; + +typedef enum +{ + IP_VXLAN_BYPASS_NEXT_DROP, + IP_VXLAN_BYPASS_NEXT_VXLAN, + IP_VXLAN_BYPASS_N_NEXT, +} ip_vxlan_bypass_next_t; + +always_inline uword +ip_vxlan_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); + vtep4_key_t last_vtep4; /* last IPv4 address / fib index + matching a local VTEP address */ + vtep6_key_t last_vtep6; /* last IPv6 address / fib index + matching a local VTEP address */ + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; + + vxlan4_gpe_tunnel_cache_t last4; + vxlan6_gpe_tunnel_cache_t last6; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + vlib_get_buffers (vm, from, bufs, n_left_from); + + if (node->flags & VLIB_NODE_FLAG_TRACE) + ip4_forward_next_trace (vm, node, frame, VLIB_TX); + + if (is_ip4) + { + vtep4_key_init (&last_vtep4); + clib_memset (&last4, 0xff, sizeof last4); + } + else + { + vtep6_key_init (&last_vtep6); + clib_memset (&last6, 0xff, sizeof last6); + } + + while (n_left_from > 0) + { + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while (n_left_from >= 4 && n_left_to_next >= 2) + { + vlib_buffer_t *b0, *b1; + ip4_header_t *ip40, *ip41; + ip6_header_t *ip60, *ip61; + udp_header_t *udp0, *udp1; + ip4_vxlan_gpe_header_t *iuvn4_0, *iuvn4_1; + ip6_vxlan_gpe_header_t *iuvn6_0, *iuvn6_1; + vxlan_gpe_decap_info_t di0, di1; + 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_prefetch_buffer_header (b[2], LOAD); + vlib_prefetch_buffer_header (b[3], LOAD); + + CLIB_PREFETCH (b[2]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (b[3]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); + } + + bi0 = to_next[0] = from[0]; + bi1 = to_next[1] = from[1]; + from += 2; + n_left_from -= 2; + to_next += 2; + n_left_to_next -= 2; + + b0 = b[0]; + b1 = b[1]; + b += 2; + if (is_ip4) + { + ip40 = vlib_buffer_get_current (b0); + ip41 = vlib_buffer_get_current (b1); + } + else + { + ip60 = vlib_buffer_get_current (b0); + ip61 = vlib_buffer_get_current (b1); + } + + /* Setup packet for next IP feature */ + vnet_feature_next (&next0, b0); + vnet_feature_next (&next1, b1); + + if (is_ip4) + { + 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); + iuvn4_0 = vlib_buffer_get_current (b0); + di0 = vxlan4_gpe_find_tunnel (ngm, &last4, iuvn4_0); + } + else + { + udp0 = ip6_next_header (ip60); + iuvn6_0 = vlib_buffer_get_current (b0); + di0 = vxlan6_gpe_find_tunnel (ngm, &last6, iuvn6_0); + } + + if (PREDICT_FALSE (di0.tunnel_index == ~0)) + goto exit0; /* unknown interface */ + + /* Validate DIP against VTEPs */ + if (is_ip4) + { +#ifdef CLIB_HAVE_VEC512 + if (!vtep4_check_vector (&ngm->vtep_table, b0, ip40, &last_vtep4, + &ngm->vtep4_u512)) +#else + if (!vtep4_check (&ngm->vtep_table, b0, ip40, &last_vtep4)) +#endif + goto exit0; /* no local VTEP for VXLAN packet */ + } + else + { + if (!vtep6_check (&ngm->vtep_table, b0, ip60, &last_vtep6)) + goto exit0; /* no local VTEP for VXLAN packet */ + } + + flags0 = b0->flags; + good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp0 |= udp0->checksum == 0; + + /* Verify UDP length */ + if (is_ip4) + ip_len0 = clib_net_to_host_u16 (ip40->length); + else + ip_len0 = clib_net_to_host_u16 (ip60->payload_length); + udp_len0 = clib_net_to_host_u16 (udp0->length); + len_diff0 = ip_len0 - udp_len0; + + /* Verify UDP checksum */ + if (PREDICT_FALSE (!good_udp0)) + { + if ((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); + iuvn4_1 = vlib_buffer_get_current (b1); + di1 = vxlan4_gpe_find_tunnel (ngm, &last4, iuvn4_1); + } + else + { + udp1 = ip6_next_header (ip61); + iuvn6_1 = vlib_buffer_get_current (b1); + di1 = vxlan6_gpe_find_tunnel (ngm, &last6, iuvn6_1); + } + + if (PREDICT_FALSE (di1.tunnel_index == ~0)) + goto exit1; /* unknown interface */ + + /* Validate DIP against VTEPs */ + if (is_ip4) + { +#ifdef CLIB_HAVE_VEC512 + if (!vtep4_check_vector (&ngm->vtep_table, b1, ip41, &last_vtep4, + &ngm->vtep4_u512)) +#else + if (!vtep4_check (&ngm->vtep_table, b1, ip41, &last_vtep4)) +#endif + goto exit1; /* no local VTEP for VXLAN packet */ + } + else + { + if (!vtep6_check (&ngm->vtep_table, b1, ip61, &last_vtep6)) + goto exit1; /* no local VTEP for VXLAN packet */ + } + + flags1 = b1->flags; + good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp1 |= udp1->checksum == 0; + + /* Verify UDP length */ + if (is_ip4) + ip_len1 = clib_net_to_host_u16 (ip41->length); + else + ip_len1 = clib_net_to_host_u16 (ip61->payload_length); + udp_len1 = clib_net_to_host_u16 (udp1->length); + len_diff1 = ip_len1 - udp_len1; + + /* Verify UDP checksum */ + if (PREDICT_FALSE (!good_udp1)) + { + if ((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; + ip4_vxlan_gpe_header_t *iuvn4_0; + ip6_vxlan_gpe_header_t *iuvn6_0; + vxlan_gpe_decap_info_t di0; + 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 = b[0]; + b++; + if (is_ip4) + ip40 = vlib_buffer_get_current (b0); + else + ip60 = vlib_buffer_get_current (b0); + + /* Setup packet for next IP feature */ + vnet_feature_next (&next0, b0); + + if (is_ip4) + 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); + iuvn4_0 = vlib_buffer_get_current (b0); + di0 = vxlan4_gpe_find_tunnel (ngm, &last4, iuvn4_0); + } + else + { + udp0 = ip6_next_header (ip60); + iuvn6_0 = vlib_buffer_get_current (b0); + di0 = vxlan6_gpe_find_tunnel (ngm, &last6, iuvn6_0); + } + + if (PREDICT_FALSE (di0.tunnel_index == ~0)) + goto exit; /* unknown interface */ + + /* Validate DIP against VTEPs */ + + if (is_ip4) + { +#ifdef CLIB_HAVE_VEC512 + if (!vtep4_check_vector (&ngm->vtep_table, b0, ip40, &last_vtep4, + &ngm->vtep4_u512)) +#else + if (!vtep4_check (&ngm->vtep_table, b0, ip40, &last_vtep4)) +#endif + goto exit; /* no local VTEP for VXLAN packet */ + } + else + { + if (!vtep6_check (&ngm->vtep_table, b0, ip60, &last_vtep6)) + goto exit; /* no local VTEP for VXLAN packet */ + } + + flags0 = b0->flags; + good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp0 |= udp0->checksum == 0; + + /* Verify UDP length */ + if (is_ip4) + ip_len0 = clib_net_to_host_u16 (ip40->length); + else + ip_len0 = clib_net_to_host_u16 (ip60->payload_length); + udp_len0 = clib_net_to_host_u16 (udp0->length); + len_diff0 = ip_len0 - udp_len0; + + /* Verify UDP checksum */ + if (PREDICT_FALSE (!good_udp0)) + { + if ((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; +} + +VLIB_NODE_FN (ip4_vxlan_gpe_bypass_node) (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) = { + .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, +}; + +#ifndef CLIB_MARCH_VARIANT +/* 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); +#endif /* CLIB_MARCH_VARIANT */ + +VLIB_NODE_FN (ip6_vxlan_gpe_bypass_node) (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) = { + .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, +}; + +#ifndef CLIB_MARCH_VARIANT +/* 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); +#endif /* CLIB_MARCH_VARIANT */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |