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Ed Warnickecb9cada2015-12-08 15:45:58 -07001/*
2 * esp_decrypt.c : IPSec ESP decrypt node
3 *
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:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
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.
16 */
17
18#include <vnet/vnet.h>
19#include <vnet/api_errno.h>
20#include <vnet/ip/ip.h>
21
22#include <vnet/ipsec/ipsec.h>
23#include <vnet/ipsec/esp.h>
24
Ed Warnickecb9cada2015-12-08 15:45:58 -070025#define foreach_esp_decrypt_next \
26_(DROP, "error-drop") \
27_(IP4_INPUT, "ip4-input") \
Matus Fabian694265d2016-08-10 01:55:36 -070028_(IP6_INPUT, "ip6-input") \
29_(IPSEC_GRE_INPUT, "ipsec-gre-input")
Ed Warnickecb9cada2015-12-08 15:45:58 -070030
31#define _(v, s) ESP_DECRYPT_NEXT_##v,
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070032typedef enum
33{
Ed Warnickecb9cada2015-12-08 15:45:58 -070034 foreach_esp_decrypt_next
35#undef _
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070036 ESP_DECRYPT_N_NEXT,
Ed Warnickecb9cada2015-12-08 15:45:58 -070037} esp_decrypt_next_t;
38
39
40#define foreach_esp_decrypt_error \
41 _(RX_PKTS, "ESP pkts received") \
42 _(NO_BUFFER, "No buffer (packed dropped)") \
43 _(DECRYPTION_FAILED, "ESP decryption failed") \
44 _(INTEG_ERROR, "Integrity check failed") \
Matus Fabianefc33302016-07-11 07:08:55 -070045 _(REPLAY, "SA replayed packet") \
46 _(NOT_IP, "Not IP packet (dropped)")
Ed Warnickecb9cada2015-12-08 15:45:58 -070047
48
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070049typedef enum
50{
Ed Warnickecb9cada2015-12-08 15:45:58 -070051#define _(sym,str) ESP_DECRYPT_ERROR_##sym,
52 foreach_esp_decrypt_error
53#undef _
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070054 ESP_DECRYPT_N_ERROR,
Ed Warnickecb9cada2015-12-08 15:45:58 -070055} esp_decrypt_error_t;
56
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070057static char *esp_decrypt_error_strings[] = {
Ed Warnickecb9cada2015-12-08 15:45:58 -070058#define _(sym,string) string,
59 foreach_esp_decrypt_error
60#undef _
61};
62
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070063typedef struct
64{
Ed Warnickecb9cada2015-12-08 15:45:58 -070065 ipsec_crypto_alg_t crypto_alg;
66 ipsec_integ_alg_t integ_alg;
67} esp_decrypt_trace_t;
68
69/* packet trace format function */
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070070static u8 *
71format_esp_decrypt_trace (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -070072{
73 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
74 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070075 esp_decrypt_trace_t *t = va_arg (*args, esp_decrypt_trace_t *);
Ed Warnickecb9cada2015-12-08 15:45:58 -070076
77 s = format (s, "esp: crypto %U integrity %U",
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070078 format_ipsec_crypto_alg, t->crypto_alg,
79 format_ipsec_integ_alg, t->integ_alg);
Ed Warnickecb9cada2015-12-08 15:45:58 -070080 return s;
81}
82
83always_inline void
“mukeshyadav1984”72454dd2017-11-28 10:52:34 -080084esp_decrypt_cbc (ipsec_crypto_alg_t alg,
85 u8 * in, u8 * out, size_t in_len, u8 * key, u8 * iv)
Ed Warnickecb9cada2015-12-08 15:45:58 -070086{
“mukeshyadav1984”430ac932017-11-23 02:39:33 -080087 ipsec_proto_main_t *em = &ipsec_proto_main;
Damjan Marion586afd72017-04-05 19:18:20 +020088 u32 thread_index = vlib_get_thread_index ();
Marco Varlesef616d102017-11-09 15:16:20 +010089#if OPENSSL_VERSION_NUMBER >= 0x10100000L
90 EVP_CIPHER_CTX *ctx = em->per_thread_data[thread_index].decrypt_ctx;
91#else
Damjan Marion586afd72017-04-05 19:18:20 +020092 EVP_CIPHER_CTX *ctx = &(em->per_thread_data[thread_index].decrypt_ctx);
Marco Varlesef616d102017-11-09 15:16:20 +010093#endif
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070094 const EVP_CIPHER *cipher = NULL;
Ed Warnickecb9cada2015-12-08 15:45:58 -070095 int out_len;
96
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070097 ASSERT (alg < IPSEC_CRYPTO_N_ALG);
Ed Warnickecb9cada2015-12-08 15:45:58 -070098
“mukeshyadav1984”430ac932017-11-23 02:39:33 -080099 if (PREDICT_FALSE (em->ipsec_proto_main_crypto_algs[alg].type == 0))
Ed Warnickecb9cada2015-12-08 15:45:58 -0700100 return;
101
Damjan Marion586afd72017-04-05 19:18:20 +0200102 if (PREDICT_FALSE
103 (alg != em->per_thread_data[thread_index].last_decrypt_alg))
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700104 {
“mukeshyadav1984”430ac932017-11-23 02:39:33 -0800105 cipher = em->ipsec_proto_main_crypto_algs[alg].type;
Damjan Marion586afd72017-04-05 19:18:20 +0200106 em->per_thread_data[thread_index].last_decrypt_alg = alg;
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700107 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700108
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700109 EVP_DecryptInit_ex (ctx, cipher, NULL, key, iv);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700110
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700111 EVP_DecryptUpdate (ctx, out, &out_len, in, in_len);
112 EVP_DecryptFinal_ex (ctx, out + out_len, &out_len);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700113}
114
Ed Warnickecb9cada2015-12-08 15:45:58 -0700115static uword
116esp_decrypt_node_fn (vlib_main_t * vm,
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700117 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700118{
119 u32 n_left_from, *from, next_index, *to_next;
120 ipsec_main_t *im = &ipsec_main;
“mukeshyadav1984”430ac932017-11-23 02:39:33 -0800121 ipsec_proto_main_t *em = &ipsec_proto_main;
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700122 u32 *recycle = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700123 from = vlib_frame_vector_args (from_frame);
124 n_left_from = from_frame->n_vectors;
Damjan Marion586afd72017-04-05 19:18:20 +0200125 u32 thread_index = vlib_get_thread_index ();
Ed Warnickecb9cada2015-12-08 15:45:58 -0700126
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700127 ipsec_alloc_empty_buffers (vm, im);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700128
Damjan Marion586afd72017-04-05 19:18:20 +0200129 u32 *empty_buffers = im->empty_buffers[thread_index];
Matus Fabian141977f2016-07-04 05:36:52 -0700130
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700131 if (PREDICT_FALSE (vec_len (empty_buffers) < n_left_from))
132 {
133 vlib_node_increment_counter (vm, esp_decrypt_node.index,
134 ESP_DECRYPT_ERROR_NO_BUFFER, n_left_from);
135 goto free_buffers_and_exit;
136 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700137
138 next_index = node->cached_next_index;
139
140 while (n_left_from > 0)
141 {
142 u32 n_left_to_next;
143
144 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
145
146 while (n_left_from > 0 && n_left_to_next > 0)
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700147 {
148 u32 i_bi0, o_bi0 = (u32) ~ 0, next0;
149 vlib_buffer_t *i_b0;
150 vlib_buffer_t *o_b0 = 0;
151 esp_header_t *esp0;
152 ipsec_sa_t *sa0;
153 u32 sa_index0 = ~0;
154 u32 seq;
155 ip4_header_t *ih4 = 0, *oh4 = 0;
156 ip6_header_t *ih6 = 0, *oh6 = 0;
157 u8 tunnel_mode = 1;
158 u8 transport_ip6 = 0;
Matus Fabianefc33302016-07-11 07:08:55 -0700159
Ed Warnickecb9cada2015-12-08 15:45:58 -0700160
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700161 i_bi0 = from[0];
162 from += 1;
163 n_left_from -= 1;
164 n_left_to_next -= 1;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700165
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700166 next0 = ESP_DECRYPT_NEXT_DROP;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700167
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700168 i_b0 = vlib_get_buffer (vm, i_bi0);
169 esp0 = vlib_buffer_get_current (i_b0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700170
Damjan Marion9c6ae5f2016-11-15 23:20:01 +0100171 sa_index0 = vnet_buffer (i_b0)->ipsec.sad_index;
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700172 sa0 = pool_elt_at_index (im->sad, sa_index0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700173
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700174 seq = clib_host_to_net_u32 (esp0->seq);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700175
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700176 /* anti-replay check */
177 if (sa0->use_anti_replay)
178 {
179 int rv = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700180
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700181 if (PREDICT_TRUE (sa0->use_esn))
182 rv = esp_replay_check_esn (sa0, seq);
183 else
184 rv = esp_replay_check (sa0, seq);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700185
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700186 if (PREDICT_FALSE (rv))
187 {
188 clib_warning ("anti-replay SPI %u seq %u", sa0->spi, seq);
189 vlib_node_increment_counter (vm, esp_decrypt_node.index,
190 ESP_DECRYPT_ERROR_REPLAY, 1);
191 o_bi0 = i_bi0;
Sergio Gonzalez Monroy73c01102016-09-06 14:06:06 +0100192 to_next[0] = o_bi0;
193 to_next += 1;
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700194 goto trace;
195 }
196 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700197
Radu Nicolaucb33dc22017-02-16 16:49:46 +0000198 sa0->total_data_size += i_b0->current_length;
199
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700200 if (PREDICT_TRUE (sa0->integ_alg != IPSEC_INTEG_ALG_NONE))
201 {
202 u8 sig[64];
“mukeshyadav1984”430ac932017-11-23 02:39:33 -0800203 int icv_size =
204 em->ipsec_proto_main_integ_algs[sa0->integ_alg].trunc_size;
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700205 memset (sig, 0, sizeof (sig));
206 u8 *icv =
207 vlib_buffer_get_current (i_b0) + i_b0->current_length -
208 icv_size;
209 i_b0->current_length -= icv_size;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700210
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700211 hmac_calc (sa0->integ_alg, sa0->integ_key, sa0->integ_key_len,
212 (u8 *) esp0, i_b0->current_length, sig, sa0->use_esn,
213 sa0->seq_hi);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700214
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700215 if (PREDICT_FALSE (memcmp (icv, sig, icv_size)))
216 {
217 vlib_node_increment_counter (vm, esp_decrypt_node.index,
218 ESP_DECRYPT_ERROR_INTEG_ERROR,
219 1);
220 o_bi0 = i_bi0;
Sergio Gonzalez Monroy73c01102016-09-06 14:06:06 +0100221 to_next[0] = o_bi0;
222 to_next += 1;
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700223 goto trace;
224 }
225 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700226
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700227 if (PREDICT_TRUE (sa0->use_anti_replay))
228 {
229 if (PREDICT_TRUE (sa0->use_esn))
230 esp_replay_advance_esn (sa0, seq);
231 else
232 esp_replay_advance (sa0, seq);
233 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700234
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700235 /* grab free buffer */
236 uword last_empty_buffer = vec_len (empty_buffers) - 1;
237 o_bi0 = empty_buffers[last_empty_buffer];
Sergio Gonzalez Monroy73c01102016-09-06 14:06:06 +0100238 to_next[0] = o_bi0;
239 to_next += 1;
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700240 o_b0 = vlib_get_buffer (vm, o_bi0);
241 vlib_prefetch_buffer_with_index (vm,
242 empty_buffers[last_empty_buffer -
243 1], STORE);
244 _vec_len (empty_buffers) = last_empty_buffer;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700245
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700246 /* add old buffer to the recycle list */
247 vec_add1 (recycle, i_bi0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700248
“mukeshyadav1984”72454dd2017-11-28 10:52:34 -0800249 if ((sa0->crypto_alg >= IPSEC_CRYPTO_ALG_AES_CBC_128 &&
250 sa0->crypto_alg <= IPSEC_CRYPTO_ALG_AES_CBC_256) ||
251 (sa0->crypto_alg >= IPSEC_CRYPTO_ALG_DES_CBC &&
252 sa0->crypto_alg <= IPSEC_CRYPTO_ALG_3DES_CBC))
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700253 {
“mukeshyadav1984”72454dd2017-11-28 10:52:34 -0800254 const int BLOCK_SIZE =
255 em->ipsec_proto_main_crypto_algs[sa0->crypto_alg].block_size;;
256 const int IV_SIZE =
257 em->ipsec_proto_main_crypto_algs[sa0->crypto_alg].iv_size;
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700258 esp_footer_t *f0;
259 u8 ip_hdr_size = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700260
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700261 int blocks =
262 (i_b0->current_length - sizeof (esp_header_t) -
263 IV_SIZE) / BLOCK_SIZE;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700264
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700265 o_b0->current_data = sizeof (ethernet_header_t);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700266
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700267 /* transport mode */
268 if (PREDICT_FALSE (!sa0->is_tunnel && !sa0->is_tunnel_ip6))
269 {
270 tunnel_mode = 0;
Szymon Sliwa8640dbd2018-03-19 15:14:31 +0000271
Szymon Sliwa65a27272018-05-09 14:28:08 +0200272 if (i_b0->flags & VNET_BUFFER_F_IS_IP4)
273 ih4 =
274 (ip4_header_t *) ((u8 *) esp0 - sizeof (ip4_header_t));
275 else
276 ih4 =
277 (ip4_header_t *) ((u8 *) esp0 - sizeof (ip6_header_t));
278
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700279 if (PREDICT_TRUE
280 ((ih4->ip_version_and_header_length & 0xF0) != 0x40))
281 {
282 if (PREDICT_TRUE
283 ((ih4->ip_version_and_header_length & 0xF0) ==
284 0x60))
285 {
286 transport_ip6 = 1;
287 ip_hdr_size = sizeof (ip6_header_t);
Szymon Sliwa8640dbd2018-03-19 15:14:31 +0000288 ih6 = (ip6_header_t *) ih4;
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700289 oh6 = vlib_buffer_get_current (o_b0);
290 }
291 else
292 {
293 vlib_node_increment_counter (vm,
294 esp_decrypt_node.index,
295 ESP_DECRYPT_ERROR_NOT_IP,
296 1);
297 o_b0 = 0;
298 goto trace;
299 }
300 }
301 else
302 {
303 oh4 = vlib_buffer_get_current (o_b0);
304 ip_hdr_size = sizeof (ip4_header_t);
305 }
306 }
Matus Fabianefc33302016-07-11 07:08:55 -0700307
“mukeshyadav1984”72454dd2017-11-28 10:52:34 -0800308 esp_decrypt_cbc (sa0->crypto_alg,
309 esp0->data + IV_SIZE,
310 (u8 *) vlib_buffer_get_current (o_b0) +
311 ip_hdr_size, BLOCK_SIZE * blocks,
312 sa0->crypto_key, esp0->data);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700313
“mukeshyadav1984”72454dd2017-11-28 10:52:34 -0800314 o_b0->current_length = (blocks * BLOCK_SIZE) - 2 + ip_hdr_size;
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700315 o_b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
316 f0 =
317 (esp_footer_t *) ((u8 *) vlib_buffer_get_current (o_b0) +
318 o_b0->current_length);
319 o_b0->current_length -= f0->pad_length;
Matus Fabianefc33302016-07-11 07:08:55 -0700320
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700321 /* tunnel mode */
322 if (PREDICT_TRUE (tunnel_mode))
323 {
324 if (PREDICT_TRUE (f0->next_header == IP_PROTOCOL_IP_IN_IP))
Matus Fabian694265d2016-08-10 01:55:36 -0700325 {
326 next0 = ESP_DECRYPT_NEXT_IP4_INPUT;
327 oh4 = vlib_buffer_get_current (o_b0);
328 }
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700329 else if (f0->next_header == IP_PROTOCOL_IPV6)
330 next0 = ESP_DECRYPT_NEXT_IP6_INPUT;
331 else
332 {
333 clib_warning ("next header: 0x%x", f0->next_header);
334 vlib_node_increment_counter (vm, esp_decrypt_node.index,
335 ESP_DECRYPT_ERROR_DECRYPTION_FAILED,
336 1);
337 o_b0 = 0;
338 goto trace;
339 }
340 }
341 /* transport mode */
342 else
343 {
344 if (PREDICT_FALSE (transport_ip6))
345 {
346 next0 = ESP_DECRYPT_NEXT_IP6_INPUT;
347 oh6->ip_version_traffic_class_and_flow_label =
348 ih6->ip_version_traffic_class_and_flow_label;
349 oh6->protocol = f0->next_header;
350 oh6->hop_limit = ih6->hop_limit;
351 oh6->src_address.as_u64[0] = ih6->src_address.as_u64[0];
352 oh6->src_address.as_u64[1] = ih6->src_address.as_u64[1];
353 oh6->dst_address.as_u64[0] = ih6->dst_address.as_u64[0];
354 oh6->dst_address.as_u64[1] = ih6->dst_address.as_u64[1];
355 oh6->payload_length =
356 clib_host_to_net_u16 (vlib_buffer_length_in_chain
357 (vm,
358 o_b0) - sizeof (ip6_header_t));
359 }
360 else
361 {
362 next0 = ESP_DECRYPT_NEXT_IP4_INPUT;
363 oh4->ip_version_and_header_length = 0x45;
364 oh4->tos = ih4->tos;
365 oh4->fragment_id = 0;
366 oh4->flags_and_fragment_offset = 0;
367 oh4->ttl = ih4->ttl;
368 oh4->protocol = f0->next_header;
369 oh4->src_address.as_u32 = ih4->src_address.as_u32;
370 oh4->dst_address.as_u32 = ih4->dst_address.as_u32;
371 oh4->length =
372 clib_host_to_net_u16 (vlib_buffer_length_in_chain
373 (vm, o_b0));
374 oh4->checksum = ip4_header_checksum (oh4);
375 }
376 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700377
Matus Fabian694265d2016-08-10 01:55:36 -0700378 /* for IPSec-GRE tunnel next node is ipsec-gre-input */
379 if (PREDICT_FALSE
Damjan Marion9c6ae5f2016-11-15 23:20:01 +0100380 ((vnet_buffer (i_b0)->ipsec.flags) &
Matus Fabian694265d2016-08-10 01:55:36 -0700381 IPSEC_FLAG_IPSEC_GRE_TUNNEL))
382 next0 = ESP_DECRYPT_NEXT_IPSEC_GRE_INPUT;
383
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700384 vnet_buffer (o_b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
Matthew Smith02e14b52017-09-14 09:05:35 -0500385 vnet_buffer (o_b0)->sw_if_index[VLIB_RX] =
386 vnet_buffer (i_b0)->sw_if_index[VLIB_RX];
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700387 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700388
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700389 trace:
390 if (PREDICT_FALSE (i_b0->flags & VLIB_BUFFER_IS_TRACED))
391 {
392 if (o_b0)
393 {
394 o_b0->flags |= VLIB_BUFFER_IS_TRACED;
395 o_b0->trace_index = i_b0->trace_index;
Damjan Marion3f54b182016-08-16 11:27:02 +0200396 esp_decrypt_trace_t *tr =
397 vlib_add_trace (vm, node, o_b0, sizeof (*tr));
398 tr->crypto_alg = sa0->crypto_alg;
399 tr->integ_alg = sa0->integ_alg;
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700400 }
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700401 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700402
403 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700404 n_left_to_next, o_bi0, next0);
405 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700406 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
407 }
408 vlib_node_increment_counter (vm, esp_decrypt_node.index,
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700409 ESP_DECRYPT_ERROR_RX_PKTS,
410 from_frame->n_vectors);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700411
412free_buffers_and_exit:
Damjan Marion3f54b182016-08-16 11:27:02 +0200413 if (recycle)
414 vlib_buffer_free (vm, recycle, vec_len (recycle));
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700415 vec_free (recycle);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700416 return from_frame->n_vectors;
417}
418
419
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700420/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700421VLIB_REGISTER_NODE (esp_decrypt_node) = {
422 .function = esp_decrypt_node_fn,
423 .name = "esp-decrypt",
424 .vector_size = sizeof (u32),
425 .format_trace = format_esp_decrypt_trace,
426 .type = VLIB_NODE_TYPE_INTERNAL,
427
428 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
429 .error_strings = esp_decrypt_error_strings,
430
431 .n_next_nodes = ESP_DECRYPT_N_NEXT,
432 .next_nodes = {
433#define _(s,n) [ESP_DECRYPT_NEXT_##s] = n,
434 foreach_esp_decrypt_next
435#undef _
436 },
437};
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700438/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700439
Damjan Marion1c80e832016-05-11 23:07:18 +0200440VLIB_NODE_FUNCTION_MULTIARCH (esp_decrypt_node, esp_decrypt_node_fn)
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700441/*
442 * fd.io coding-style-patch-verification: ON
443 *
444 * Local Variables:
445 * eval: (c-set-style "gnu")
446 * End:
447 */