/* * Copyright (c) 2017-2019 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 <vnet/udp/udp_encap.h> #include <vnet/udp/udp.h> typedef struct udp4_encap_trace_t_ { udp_header_t udp; ip4_header_t ip; } udp4_encap_trace_t; typedef struct udp6_encap_trace_t_ { udp_header_t udp; ip6_header_t ip; } udp6_encap_trace_t; extern vlib_combined_counter_main_t udp_encap_counters; static u8 * format_udp4_encap_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 *); udp4_encap_trace_t *t; t = va_arg (*args, udp4_encap_trace_t *); s = format (s, "%U\n %U", format_ip4_header, &t->ip, sizeof (t->ip), format_udp_header, &t->udp, sizeof (t->udp)); return (s); } static u8 * format_udp6_encap_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 *); udp6_encap_trace_t *t; t = va_arg (*args, udp6_encap_trace_t *); s = format (s, "%U\n %U", format_ip6_header, &t->ip, sizeof (t->ip), format_udp_header, &t->udp, sizeof (t->udp)); return (s); } always_inline uword udp_encap_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, int is_encap_v6) { vlib_combined_counter_main_t *cm = &udp_encap_counters; u32 *from = vlib_frame_vector_args (frame); u32 n_left_from, n_left_to_next, *to_next, next_index; u32 thread_index = vm->thread_index; n_left_from = frame->n_vectors; next_index = node->cached_next_index; 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; udp_encap_t *ue0, *ue1; u32 bi0, next0, uei0; u32 bi1, next1, uei1; /* 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, STORE); vlib_prefetch_buffer_header (p3, STORE); } 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); uei0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX]; uei1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX]; vlib_increment_combined_counter (cm, thread_index, uei0, 1, vlib_buffer_length_in_chain (vm, b0)); vlib_increment_combined_counter (cm, thread_index, uei1, 1, vlib_buffer_length_in_chain (vm, b1)); /* Rewrite packet header and updates lengths. */ ue0 = udp_encap_get (uei0); ue1 = udp_encap_get (uei1); /* Paint */ if (is_encap_v6) { const u8 n_bytes = sizeof (udp_header_t) + sizeof (ip6_header_t); ip_udp_encap_two (vm, b0, b1, (u8 *) & ue0->ue_hdrs, (u8 *) & ue1->ue_hdrs, n_bytes, 0); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { udp6_encap_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->udp = ue0->ue_hdrs.ip6.ue_udp; tr->ip = ue0->ue_hdrs.ip6.ue_ip6; } if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) { udp6_encap_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof (*tr)); tr->udp = ue1->ue_hdrs.ip6.ue_udp; tr->ip = ue1->ue_hdrs.ip6.ue_ip6; } } else { const u8 n_bytes = sizeof (udp_header_t) + sizeof (ip4_header_t); ip_udp_encap_two (vm, b0, b1, (u8 *) & ue0->ue_hdrs, (u8 *) & ue1->ue_hdrs, n_bytes, 1); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { udp4_encap_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->udp = ue0->ue_hdrs.ip4.ue_udp; tr->ip = ue0->ue_hdrs.ip4.ue_ip4; } if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) { udp4_encap_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof (*tr)); tr->udp = ue1->ue_hdrs.ip4.ue_udp; tr->ip = ue1->ue_hdrs.ip4.ue_ip4; } } next0 = ue0->ue_dpo.dpoi_next_node; next1 = ue1->ue_dpo.dpoi_next_node; vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ue0->ue_dpo.dpoi_index; vnet_buffer (b1)->ip.adj_index[VLIB_TX] = ue1->ue_dpo.dpoi_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, next0, uei0; vlib_buffer_t *b0; udp_encap_t *ue0; 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); uei0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX]; /* Rewrite packet header and updates lengths. */ ue0 = udp_encap_get (uei0); vlib_increment_combined_counter (cm, thread_index, uei0, 1, vlib_buffer_length_in_chain (vm, b0)); /* Paint */ if (is_encap_v6) { const u8 n_bytes = sizeof (udp_header_t) + sizeof (ip6_header_t); ip_udp_encap_one (vm, b0, (u8 *) & ue0->ue_hdrs.ip6, n_bytes, 0); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { udp6_encap_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->udp = ue0->ue_hdrs.ip6.ue_udp; tr->ip = ue0->ue_hdrs.ip6.ue_ip6; } } else { const u8 n_bytes = sizeof (udp_header_t) + sizeof (ip4_header_t); ip_udp_encap_one (vm, b0, (u8 *) & ue0->ue_hdrs.ip4, n_bytes, 1); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { udp4_encap_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->udp = ue0->ue_hdrs.ip4.ue_udp; tr->ip = ue0->ue_hdrs.ip4.ue_ip4; } } next0 = ue0->ue_dpo.dpoi_next_node; vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ue0->ue_dpo.dpoi_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); } return frame->n_vectors; } VLIB_NODE_FN (udp4_encap_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return udp_encap_inline (vm, node, frame, 0); } VLIB_NODE_FN (udp6_encap_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return udp_encap_inline (vm, node, frame, 1); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (udp4_encap_node) = { .name = "udp4-encap", .vector_size = sizeof (u32), .format_trace = format_udp4_encap_trace, .n_next_nodes = 0, }; VLIB_REGISTER_NODE (udp6_encap_node) = { .name = "udp6-encap", .vector_size = sizeof (u32), .format_trace = format_udp6_encap_trace, .n_next_nodes = 0, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */