2 * ipsec_if_in.c : IPSec interface input node
4 * Copyright (c) 2015 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/vnet.h>
19 #include <vnet/api_errno.h>
20 #include <vnet/ip/ip.h>
22 #include <vnet/ipsec/ipsec.h>
23 #include <vnet/ipsec/esp.h>
26 #define ESP_NODE "dpdk-esp-decrypt"
28 #define ESP_NODE "esp-decrypt"
31 /* Statistics (not really errors) */
32 #define foreach_ipsec_if_input_error \
33 _(RX, "good packets received")
35 static char *ipsec_if_input_error_strings[] = {
36 #define _(sym,string) string,
37 foreach_ipsec_if_input_error
43 #define _(sym,str) IPSEC_IF_INPUT_ERROR_##sym,
44 foreach_ipsec_if_input_error
46 IPSEC_IF_INPUT_N_ERROR,
47 } ipsec_if_input_error_t;
51 IPSEC_IF_INPUT_NEXT_ESP_DECRYPT,
52 IPSEC_IF_INPUT_NEXT_DROP,
53 IPSEC_IF_INPUT_N_NEXT,
54 } ipsec_if_input_next_t;
60 } ipsec_if_input_trace_t;
64 format_ipsec_if_input_trace (u8 * s, va_list * args)
66 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
67 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
68 ipsec_if_input_trace_t *t = va_arg (*args, ipsec_if_input_trace_t *);
70 s = format (s, "IPSec: spi %u seq %u", t->spi, t->seq);
75 ipsec_if_input_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
76 vlib_frame_t * from_frame)
78 ipsec_main_t *im = &ipsec_main;
79 u32 *from, *to_next = 0, next_index;
82 from = vlib_frame_vector_args (from_frame);
83 n_left_from = from_frame->n_vectors;
84 next_index = node->cached_next_index;
86 while (n_left_from > 0)
90 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
92 while (n_left_from > 0 && n_left_to_next > 0)
100 bi0 = to_next[0] = from[0];
105 b0 = vlib_get_buffer (vm, bi0);
106 ip0 = vlib_buffer_get_current (b0);
107 esp0 = (esp_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0));
109 next0 = IPSEC_IF_INPUT_NEXT_DROP;
111 u64 key = (u64) ip0->src_address.as_u32 << 32 |
112 (u64) clib_net_to_host_u32 (esp0->spi);
114 p = hash_get (im->ipsec_if_pool_index_by_key, key);
118 ipsec_tunnel_if_t *t;
119 t = pool_elt_at_index (im->tunnel_interfaces, p[0]);
120 vnet_buffer (b0)->ipsec.sad_index = t->input_sa_index;
121 vnet_buffer (b0)->ipsec.flags =
122 t->hw_if_index == ~0 ? IPSEC_FLAG_IPSEC_GRE_TUNNEL : 0;
123 vlib_buffer_advance (b0, ip4_header_bytes (ip0));
124 next0 = IPSEC_IF_INPUT_NEXT_ESP_DECRYPT;
127 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
129 ipsec_if_input_trace_t *tr =
130 vlib_add_trace (vm, node, b0, sizeof (*tr));
131 tr->spi = clib_host_to_net_u32 (esp0->spi);
132 tr->seq = clib_host_to_net_u32 (esp0->seq);
135 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
136 n_left_to_next, bi0, next0);
138 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
141 vlib_node_increment_counter (vm, ipsec_if_input_node.index,
142 IPSEC_IF_INPUT_ERROR_RX,
143 from_frame->n_vectors);
145 return from_frame->n_vectors;
149 VLIB_REGISTER_NODE (ipsec_if_input_node) = {
150 .function = ipsec_if_input_node_fn,
151 .name = "ipsec-if-input",
152 .vector_size = sizeof (u32),
153 .format_trace = format_ipsec_if_input_trace,
154 .type = VLIB_NODE_TYPE_INTERNAL,
156 .n_errors = ARRAY_LEN(ipsec_if_input_error_strings),
157 .error_strings = ipsec_if_input_error_strings,
159 .n_next_nodes = IPSEC_IF_INPUT_N_NEXT,
162 [IPSEC_IF_INPUT_NEXT_ESP_DECRYPT] = ESP_NODE,
163 [IPSEC_IF_INPUT_NEXT_DROP] = "error-drop",
168 VLIB_NODE_FUNCTION_MULTIARCH (ipsec_if_input_node, ipsec_if_input_node_fn)
170 * fd.io coding-style-patch-verification: ON
173 * eval: (c-set-style "gnu")