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Vector Packet Processing
esp_encrypt.c
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1 /*
2  * esp_encrypt.c : IPSec ESP encrypt 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 #include <vnet/udp/udp.h>
22 
23 #include <vnet/ipsec/ipsec.h>
24 #include <vnet/ipsec/esp.h>
25 
27 
28 #define foreach_esp_encrypt_next \
29 _(DROP, "error-drop") \
30 _(IP4_LOOKUP, "ip4-lookup") \
31 _(IP6_LOOKUP, "ip6-lookup") \
32 _(INTERFACE_OUTPUT, "interface-output")
33 
34 #define _(v, s) ESP_ENCRYPT_NEXT_##v,
35 typedef enum
36 {
38 #undef _
41 
42 #define foreach_esp_encrypt_error \
43  _(RX_PKTS, "ESP pkts received") \
44  _(NO_BUFFER, "No buffer (packet dropped)") \
45  _(DECRYPTION_FAILED, "ESP encryption failed") \
46  _(SEQ_CYCLED, "sequence number cycled")
47 
48 
49 typedef enum
50 {
51 #define _(sym,str) ESP_ENCRYPT_ERROR_##sym,
53 #undef _
56 
57 static char *esp_encrypt_error_strings[] = {
58 #define _(sym,string) string,
60 #undef _
61 };
62 
64 
65 typedef struct
66 {
73 
74 /* packet trace format function */
75 static u8 *
76 format_esp_encrypt_trace (u8 * s, va_list * args)
77 {
78  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
79  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
80  esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *);
81 
82  s = format (s, "esp: spi %u seq %u crypto %U integrity %U%s",
83  t->spi, t->seq,
86  t->udp_encap ? " udp-encap-enabled" : "");
87  return s;
88 }
89 
90 always_inline void
92  u8 * in, u8 * out, size_t in_len, u8 * key, u8 * iv)
93 {
95  u32 thread_index = vm->thread_index;
96 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
97  EVP_CIPHER_CTX *ctx = em->per_thread_data[thread_index].encrypt_ctx;
98 #else
99  EVP_CIPHER_CTX *ctx = &(em->per_thread_data[thread_index].encrypt_ctx);
100 #endif
101  const EVP_CIPHER *cipher = NULL;
102  int out_len;
103 
104  ASSERT (alg < IPSEC_CRYPTO_N_ALG);
105 
106  if (PREDICT_FALSE
107  (em->ipsec_proto_main_crypto_algs[alg].type == IPSEC_CRYPTO_ALG_NONE))
108  return;
109 
110  if (PREDICT_FALSE
111  (alg != em->per_thread_data[thread_index].last_encrypt_alg))
112  {
113  cipher = em->ipsec_proto_main_crypto_algs[alg].type;
114  em->per_thread_data[thread_index].last_encrypt_alg = alg;
115  }
116 
117  EVP_EncryptInit_ex (ctx, cipher, NULL, key, iv);
118 
119  EVP_EncryptUpdate (ctx, out, &out_len, in, in_len);
120  EVP_EncryptFinal_ex (ctx, out + out_len, &out_len);
121 }
122 
123 static uword
125  vlib_node_runtime_t * node, vlib_frame_t * from_frame)
126 {
127  u32 n_left_from, *from, *to_next = 0, next_index;
128  from = vlib_frame_vector_args (from_frame);
129  n_left_from = from_frame->n_vectors;
130  ipsec_main_t *im = &ipsec_main;
132  u32 *recycle = 0;
133  u32 thread_index = vm->thread_index;
134 
135  ipsec_alloc_empty_buffers (vm, im);
136 
137  u32 *empty_buffers = im->empty_buffers[thread_index];
138 
139  if (PREDICT_FALSE (vec_len (empty_buffers) < n_left_from))
140  {
142  ESP_ENCRYPT_ERROR_NO_BUFFER, n_left_from);
143  clib_warning ("no enough empty buffers. discarding frame");
144  goto free_buffers_and_exit;
145  }
146 
147  next_index = node->cached_next_index;
148 
149  while (n_left_from > 0)
150  {
151  u32 n_left_to_next;
152 
153  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
154 
155  while (n_left_from > 0 && n_left_to_next > 0)
156  {
157  u32 i_bi0, o_bi0, next0;
158  vlib_buffer_t *i_b0, *o_b0 = 0;
159  u32 sa_index0;
160  ipsec_sa_t *sa0;
161  ip4_and_esp_header_t *oh0 = 0;
162  ip6_and_esp_header_t *ih6_0, *oh6_0 = 0;
163  ip4_and_udp_and_esp_header_t *iuh0, *ouh0 = 0;
164  uword last_empty_buffer;
165  esp_header_t *o_esp0;
166  esp_footer_t *f0;
167  u8 is_ipv6;
168  u8 ip_udp_hdr_size;
169  u8 next_hdr_type;
170  u32 ip_proto = 0;
171  u8 transport_mode = 0;
172 
173  i_bi0 = from[0];
174  from += 1;
175  n_left_from -= 1;
176  n_left_to_next -= 1;
177 
178  next0 = ESP_ENCRYPT_NEXT_DROP;
179 
180  i_b0 = vlib_get_buffer (vm, i_bi0);
181  sa_index0 = vnet_buffer (i_b0)->ipsec.sad_index;
182  sa0 = pool_elt_at_index (im->sad, sa_index0);
183 
184  if (PREDICT_FALSE (esp_seq_advance (sa0)))
185  {
186  clib_warning ("sequence number counter has cycled SPI %u",
187  sa0->spi);
189  ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
190  //TODO: rekey SA
191  o_bi0 = i_bi0;
192  to_next[0] = o_bi0;
193  to_next += 1;
194  goto trace;
195  }
196 
197  sa0->total_data_size += i_b0->current_length;
198 
199  /* grab free buffer */
200  last_empty_buffer = vec_len (empty_buffers) - 1;
201  o_bi0 = empty_buffers[last_empty_buffer];
202  o_b0 = vlib_get_buffer (vm, o_bi0);
203  o_b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
204  o_b0->current_data = sizeof (ethernet_header_t);
205  iuh0 = vlib_buffer_get_current (i_b0);
207  empty_buffers[last_empty_buffer -
208  1], STORE);
209  _vec_len (empty_buffers) = last_empty_buffer;
210  to_next[0] = o_bi0;
211  to_next += 1;
212 
213  /* add old buffer to the recycle list */
214  vec_add1 (recycle, i_bi0);
215 
216  /* is ipv6 */
217  if (PREDICT_FALSE
218  ((iuh0->ip4.ip_version_and_header_length & 0xF0) == 0x60))
219  {
220  is_ipv6 = 1;
221  ih6_0 = vlib_buffer_get_current (i_b0);
222  next_hdr_type = IP_PROTOCOL_IPV6;
223  oh6_0 = vlib_buffer_get_current (o_b0);
224 
225  oh6_0->ip6.ip_version_traffic_class_and_flow_label =
226  ih6_0->ip6.ip_version_traffic_class_and_flow_label;
227  oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
228  ip_udp_hdr_size = sizeof (ip6_header_t);
229  o_esp0 = vlib_buffer_get_current (o_b0) + ip_udp_hdr_size;
230  oh6_0->ip6.hop_limit = 254;
231  oh6_0->ip6.src_address.as_u64[0] =
232  ih6_0->ip6.src_address.as_u64[0];
233  oh6_0->ip6.src_address.as_u64[1] =
234  ih6_0->ip6.src_address.as_u64[1];
235  oh6_0->ip6.dst_address.as_u64[0] =
236  ih6_0->ip6.dst_address.as_u64[0];
237  oh6_0->ip6.dst_address.as_u64[1] =
238  ih6_0->ip6.dst_address.as_u64[1];
239  o_esp0->spi = clib_net_to_host_u32 (sa0->spi);
240  o_esp0->seq = clib_net_to_host_u32 (sa0->seq);
241  ip_proto = ih6_0->ip6.protocol;
242 
243  next0 = ESP_ENCRYPT_NEXT_IP6_LOOKUP;
244  }
245  else
246  {
247  is_ipv6 = 0;
248  next_hdr_type = IP_PROTOCOL_IP_IN_IP;
249  oh0 = vlib_buffer_get_current (o_b0);
250  ouh0 = vlib_buffer_get_current (o_b0);
251 
252  oh0->ip4.ip_version_and_header_length = 0x45;
253  oh0->ip4.tos = iuh0->ip4.tos;
254  oh0->ip4.fragment_id = 0;
255  oh0->ip4.flags_and_fragment_offset = 0;
256  oh0->ip4.ttl = 254;
257  if (sa0->udp_encap)
258  {
259  ouh0->udp.src_port =
260  clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
261  ouh0->udp.dst_port =
262  clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
263  ouh0->udp.checksum = 0;
264  ouh0->ip4.protocol = IP_PROTOCOL_UDP;
265  ip_udp_hdr_size =
266  sizeof (udp_header_t) + sizeof (ip4_header_t);
267  }
268  else
269  {
270  oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
271  ip_udp_hdr_size = sizeof (ip4_header_t);
272  }
273  o_esp0 = vlib_buffer_get_current (o_b0) + ip_udp_hdr_size;
274  oh0->ip4.src_address.as_u32 = iuh0->ip4.src_address.as_u32;
275  oh0->ip4.dst_address.as_u32 = iuh0->ip4.dst_address.as_u32;
276  o_esp0->spi = clib_net_to_host_u32 (sa0->spi);
277  o_esp0->seq = clib_net_to_host_u32 (sa0->seq);
278  ip_proto = iuh0->ip4.protocol;
279 
280  next0 = ESP_ENCRYPT_NEXT_IP4_LOOKUP;
281  }
282 
283  if (PREDICT_TRUE
284  (!is_ipv6 && sa0->is_tunnel && !sa0->is_tunnel_ip6))
285  {
286  oh0->ip4.src_address.as_u32 = sa0->tunnel_src_addr.ip4.as_u32;
287  oh0->ip4.dst_address.as_u32 = sa0->tunnel_dst_addr.ip4.as_u32;
288 
289  vnet_buffer (o_b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
290  }
291  else if (is_ipv6 && sa0->is_tunnel && sa0->is_tunnel_ip6)
292  {
293  oh6_0->ip6.src_address.as_u64[0] =
294  sa0->tunnel_src_addr.ip6.as_u64[0];
295  oh6_0->ip6.src_address.as_u64[1] =
296  sa0->tunnel_src_addr.ip6.as_u64[1];
297  oh6_0->ip6.dst_address.as_u64[0] =
298  sa0->tunnel_dst_addr.ip6.as_u64[0];
299  oh6_0->ip6.dst_address.as_u64[1] =
300  sa0->tunnel_dst_addr.ip6.as_u64[1];
301 
302  vnet_buffer (o_b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
303  }
304  else
305  {
306  next_hdr_type = ip_proto;
307  if (vnet_buffer (i_b0)->sw_if_index[VLIB_TX] != ~0)
308  {
309  transport_mode = 1;
310  ethernet_header_t *ieh0, *oeh0;
311  ieh0 =
312  (ethernet_header_t *) ((u8 *)
313  vlib_buffer_get_current (i_b0) -
314  sizeof (ethernet_header_t));
315  oeh0 = (ethernet_header_t *) o_b0->data;
316  clib_memcpy (oeh0, ieh0, sizeof (ethernet_header_t));
317  next0 = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT;
318  vnet_buffer (o_b0)->sw_if_index[VLIB_TX] =
319  vnet_buffer (i_b0)->sw_if_index[VLIB_TX];
320  }
321  vlib_buffer_advance (i_b0, ip_udp_hdr_size);
322  }
323 
325 
326  if (PREDICT_TRUE (sa0->crypto_alg != IPSEC_CRYPTO_ALG_NONE))
327  {
328 
329  const int BLOCK_SIZE =
331  const int IV_SIZE =
333  int blocks = 1 + (i_b0->current_length + 1) / BLOCK_SIZE;
334 
335  /* pad packet in input buffer */
336  u8 pad_bytes = BLOCK_SIZE * blocks - 2 - i_b0->current_length;
337  u8 i;
338  u8 *padding =
340  i_b0->current_length = BLOCK_SIZE * blocks;
341  for (i = 0; i < pad_bytes; ++i)
342  {
343  padding[i] = i + 1;
344  }
345  f0 = vlib_buffer_get_current (i_b0) + i_b0->current_length - 2;
346  f0->pad_length = pad_bytes;
347  f0->next_header = next_hdr_type;
348 
349  o_b0->current_length = ip_udp_hdr_size + sizeof (esp_header_t) +
350  BLOCK_SIZE * blocks + IV_SIZE;
351 
352  vnet_buffer (o_b0)->sw_if_index[VLIB_RX] =
353  vnet_buffer (i_b0)->sw_if_index[VLIB_RX];
354 
355  u8 iv[em->
356  ipsec_proto_main_crypto_algs[sa0->crypto_alg].iv_size];
357  RAND_bytes (iv, sizeof (iv));
358 
360  ip_udp_hdr_size + sizeof (esp_header_t), iv,
362  crypto_alg].iv_size);
363 
364  esp_encrypt_cbc (vm, sa0->crypto_alg,
365  (u8 *) vlib_buffer_get_current (i_b0),
366  (u8 *) vlib_buffer_get_current (o_b0) +
367  ip_udp_hdr_size + sizeof (esp_header_t) +
368  IV_SIZE, BLOCK_SIZE * blocks,
369  sa0->crypto_key, iv);
370  }
371 
372  o_b0->current_length += hmac_calc (sa0->integ_alg, sa0->integ_key,
373  sa0->integ_key_len,
374  (u8 *) o_esp0,
375  o_b0->current_length -
376  ip_udp_hdr_size,
377  vlib_buffer_get_current (o_b0) +
378  o_b0->current_length,
379  sa0->use_esn, sa0->seq_hi);
380 
381 
382  if (PREDICT_FALSE (is_ipv6))
383  {
384  oh6_0->ip6.payload_length =
385  clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, o_b0) -
386  sizeof (ip6_header_t));
387  }
388  else
389  {
390  oh0->ip4.length =
391  clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, o_b0));
392  oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
393  if (sa0->udp_encap)
394  {
395  ouh0->udp.length =
396  clib_host_to_net_u16 (clib_net_to_host_u16
397  (oh0->ip4.length) -
398  ip4_header_bytes (&oh0->ip4));
399  }
400  }
401 
402  if (transport_mode)
403  vlib_buffer_reset (o_b0);
404 
405  trace:
406  if (PREDICT_FALSE (i_b0->flags & VLIB_BUFFER_IS_TRACED))
407  {
408  if (o_b0)
409  {
410  o_b0->flags |= VLIB_BUFFER_IS_TRACED;
411  o_b0->trace_index = i_b0->trace_index;
412  esp_encrypt_trace_t *tr =
413  vlib_add_trace (vm, node, o_b0, sizeof (*tr));
414  tr->spi = sa0->spi;
415  tr->seq = sa0->seq - 1;
416  tr->udp_encap = sa0->udp_encap;
417  tr->crypto_alg = sa0->crypto_alg;
418  tr->integ_alg = sa0->integ_alg;
419  }
420  }
421 
422  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
423  to_next, n_left_to_next, o_bi0,
424  next0);
425  }
426  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
427  }
429  ESP_ENCRYPT_ERROR_RX_PKTS,
430  from_frame->n_vectors);
431 
432 free_buffers_and_exit:
433  if (recycle)
434  vlib_buffer_free (vm, recycle, vec_len (recycle));
435  vec_free (recycle);
436  return from_frame->n_vectors;
437 }
438 
439 
440 /* *INDENT-OFF* */
442  .function = esp_encrypt_node_fn,
443  .name = "esp-encrypt",
444  .vector_size = sizeof (u32),
445  .format_trace = format_esp_encrypt_trace,
446  .type = VLIB_NODE_TYPE_INTERNAL,
447 
449  .error_strings = esp_encrypt_error_strings,
450 
451  .n_next_nodes = ESP_ENCRYPT_N_NEXT,
452  .next_nodes = {
453 #define _(s,n) [ESP_ENCRYPT_NEXT_##s] = n,
455 #undef _
456  },
457 };
458 /* *INDENT-ON* */
459 
461 /*
462  * fd.io coding-style-patch-verification: ON
463  *
464  * Local Variables:
465  * eval: (c-set-style "gnu")
466  * End:
467  */
static vlib_cli_command_t trace
(constructor) VLIB_CLI_COMMAND (trace)
Definition: vlib_api_cli.c:862
#define CLIB_UNUSED(x)
Definition: clib.h:81
ip46_address_t tunnel_src_addr
Definition: ipsec.h:131
static void vlib_buffer_reset(vlib_buffer_t *b)
Reset current header & length to state they were in when packet was received.
Definition: buffer.h:247
static void vlib_buffer_free(vlib_main_t *vm, u32 *buffers, u32 n_buffers)
Free buffers Frees the entire buffer chain for each buffer.
Definition: buffer_funcs.h:547
#define PREDICT_TRUE(x)
Definition: clib.h:108
static uword esp_encrypt_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: esp_encrypt.c:124
#define NULL
Definition: clib.h:57
static unsigned int hmac_calc(ipsec_integ_alg_t alg, u8 *key, int key_len, u8 *data, int data_len, u8 *signature, u8 use_esn, u32 seq_hi)
Definition: esp.h:331
ipsec_integ_alg_t integ_alg
Definition: ipsec.h:121
u32 thread_index
Definition: main.h:179
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:523
u8 is_tunnel
Definition: ipsec.h:128
static u8 * format_esp_encrypt_trace(u8 *s, va_list *args)
Definition: esp_encrypt.c:76
int i
ipsec_integ_alg_t integ_alg
Definition: esp_encrypt.c:71
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
ipsec_crypto_alg_t crypto_alg
Definition: esp_encrypt.c:70
const EVP_CIPHER * type
Definition: esp.h:62
static uword vlib_buffer_length_in_chain(vlib_main_t *vm, vlib_buffer_t *b)
Get length in bytes of the buffer chain.
Definition: buffer_funcs.h:263
ipsec_proto_main_crypto_alg_t * ipsec_proto_main_crypto_algs
Definition: esp.h:100
unsigned char u8
Definition: types.h:56
u8 crypto_key[128]
Definition: ipsec.h:119
u32 spi
Definition: ipsec.h:114
ipsec_proto_main_t ipsec_proto_main
Definition: esp_encrypt.c:26
u32 seq_hi
Definition: ipsec.h:138
static int esp_seq_advance(ipsec_sa_t *sa)
Definition: esp.h:233
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:109
u8 integ_key[128]
Definition: ipsec.h:123
#define foreach_esp_encrypt_next
Definition: esp_encrypt.c:28
#define vlib_prefetch_buffer_with_index(vm, bi, type)
Prefetch buffer metadata by buffer index The first 64 bytes of buffer contains most header informatio...
Definition: buffer_funcs.h:337
ipsec_main_t ipsec_main
Definition: ipsec.c:30
#define always_inline
Definition: clib.h:94
vlib_node_registration_t esp_encrypt_node
(constructor) VLIB_REGISTER_NODE (esp_encrypt_node)
Definition: esp_encrypt.c:63
u8 use_esn
Definition: ipsec.h:125
unsigned int u32
Definition: types.h:88
u32 padding
Definition: vhost_user.h:115
u8 * format_ipsec_crypto_alg(u8 *s, va_list *args)
Definition: ipsec_format.c:58
u8 udp_encap
Definition: ipsec.h:130
esp_encrypt_error_t
Definition: esp_encrypt.c:49
#define VLIB_NODE_FUNCTION_MULTIARCH(node, fn)
Definition: node.h:209
ipsec_proto_main_per_thread_data_t * per_thread_data
Definition: esp.h:102
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:464
ipsec_integ_alg_t
Definition: ipsec.h:97
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:113
u8 is_tunnel_ip6
Definition: ipsec.h:129
long ctx[MAX_CONNS]
Definition: main.c:144
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:205
#define PREDICT_FALSE(x)
Definition: clib.h:107
ipsec_crypto_alg_t last_encrypt_alg
Definition: esp.h:93
#define vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0)
Finish enqueueing one buffer forward in the graph.
Definition: buffer_node.h:218
#define vlib_get_next_frame(vm, node, next_index, vectors, n_vectors_left)
Get pointer to next frame vector data by (vlib_node_runtime_t, next_index).
Definition: node_funcs.h:364
static char * esp_encrypt_error_strings[]
Definition: esp_encrypt.c:57
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1176
ip46_address_t tunnel_dst_addr
Definition: ipsec.h:132
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:155
u16 n_vectors
Definition: node.h:401
vlib_main_t * vm
Definition: buffer.c:294
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:339
#define clib_warning(format, args...)
Definition: error.h:59
#define clib_memcpy(a, b, c)
Definition: string.h:75
static void ipsec_alloc_empty_buffers(vlib_main_t *vm, ipsec_main_t *im)
Definition: ipsec.h:356
#define ARRAY_LEN(x)
Definition: clib.h:61
esp_encrypt_next_t
Definition: esp_encrypt.c:35
void vlib_put_next_frame(vlib_main_t *vm, vlib_node_runtime_t *r, u32 next_index, u32 n_vectors_left)
Release pointer to next frame vector data.
Definition: main.c:455
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:513
#define ASSERT(truth)
ipsec_sa_t * sad
Definition: ipsec.h:265
static void esp_encrypt_cbc(vlib_main_t *vm, ipsec_crypto_alg_t alg, u8 *in, u8 *out, size_t in_len, u8 *key, u8 *iv)
Definition: esp_encrypt.c:91
ipsec_crypto_alg_t
Definition: ipsec.h:80
u64 total_data_size
Definition: ipsec.h:144
u8 integ_key_len
Definition: ipsec.h:122
u32 seq
Definition: esp.h:28
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:218
EVP_CIPHER_CTX encrypt_ctx
Definition: esp.h:79
u32 spi
Definition: esp.h:27
u32 seq
Definition: ipsec.h:137
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:57
u8 * format_ipsec_integ_alg(u8 *s, va_list *args)
Definition: ipsec_format.c:90
struct _vlib_node_registration vlib_node_registration_t
Definition: defs.h:47
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
u64 uword
Definition: types.h:112
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:267
#define vnet_buffer(b)
Definition: buffer.h:344
ipsec_crypto_alg_t crypto_alg
Definition: ipsec.h:117
u8 data[0]
Packet data.
Definition: buffer.h:175
static int ip4_header_bytes(const ip4_header_t *i)
Definition: ip4_packet.h:234
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:116
u32 ** empty_buffers
Definition: ipsec.h:271
#define foreach_esp_encrypt_error
Definition: esp_encrypt.c:42
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:58
u32 trace_index
Specifies index into trace buffer if VLIB_PACKET_IS_TRACED flag is set.
Definition: buffer.h:150
static u16 ip4_header_checksum(ip4_header_t *i)
Definition: ip4_packet.h:246
Definition: defs.h:46