diff options
Diffstat (limited to 'src/vnet/udp/udp_encap_node.c')
| -rw-r--r-- | src/vnet/udp/udp_encap_node.c | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/src/vnet/udp/udp_encap_node.c b/src/vnet/udp/udp_encap_node.c new file mode 100644 index 00000000000..09a76b530f6 --- /dev/null +++ b/src/vnet/udp/udp_encap_node.c @@ -0,0 +1,280 @@ +/* + * Copyright (c) 2017 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> + +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; + +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) +{ + u32 *from = vlib_frame_vector_args (frame); + u32 n_left_from, n_left_to_next, *to_next, next_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]; + + /* 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); + + /* 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; +} + +static uword +udp4_encap (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return udp_encap_inline (vm, node, frame, 0); +} + +static uword +udp6_encap (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) = { + .function = udp4_encap, + .name = "udp4-encap", + .vector_size = sizeof (u32), + + .format_trace = format_udp4_encap_trace, + + .n_next_nodes = 0, +}; +VLIB_NODE_FUNCTION_MULTIARCH (udp4_encap_node, udp4_encap); + +VLIB_REGISTER_NODE (udp6_encap_node) = { + .function = udp6_encap, + .name = "udp6-encap", + .vector_size = sizeof (u32), + + .format_trace = format_udp6_encap_trace, + + .n_next_nodes = 0, +}; +VLIB_NODE_FUNCTION_MULTIARCH (udp6_encap_node, udp6_encap); +/* *INDENT-ON* */ + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |