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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 
63 typedef struct
64 {
71 
72 /* packet trace format function */
73 static u8 *
74 format_esp_encrypt_trace (u8 * s, va_list * args)
75 {
76  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
77  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
78  esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *);
79 
80  s = format (s, "esp: spi %u seq %u crypto %U integrity %U%s",
81  t->spi, t->seq,
84  t->udp_encap ? " udp-encap-enabled" : "");
85  return s;
86 }
87 
88 always_inline void
90  u8 * in, u8 * out, size_t in_len, u8 * key, u8 * iv)
91 {
93  u32 thread_index = vm->thread_index;
94 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
95  EVP_CIPHER_CTX *ctx = em->per_thread_data[thread_index].encrypt_ctx;
96 #else
97  EVP_CIPHER_CTX *ctx = &(em->per_thread_data[thread_index].encrypt_ctx);
98 #endif
99  const EVP_CIPHER *cipher = NULL;
100  int out_len;
101 
102  ASSERT (alg < IPSEC_CRYPTO_N_ALG);
103 
104  if (PREDICT_FALSE
105  (em->ipsec_proto_main_crypto_algs[alg].type == IPSEC_CRYPTO_ALG_NONE))
106  return;
107 
108  if (PREDICT_FALSE
109  (alg != em->per_thread_data[thread_index].last_encrypt_alg))
110  {
111  cipher = em->ipsec_proto_main_crypto_algs[alg].type;
112  em->per_thread_data[thread_index].last_encrypt_alg = alg;
113  }
114 
115  EVP_EncryptInit_ex (ctx, cipher, NULL, key, iv);
116 
117  EVP_EncryptUpdate (ctx, out, &out_len, in, in_len);
118  EVP_EncryptFinal_ex (ctx, out + out_len, &out_len);
119 }
120 
123  vlib_node_runtime_t * node, vlib_frame_t * from_frame,
124  int is_ip6)
125 {
126  u32 n_left_from, *from, *to_next = 0, next_index;
127  from = vlib_frame_vector_args (from_frame);
128  n_left_from = from_frame->n_vectors;
129  ipsec_main_t *im = &ipsec_main;
131  u32 *recycle = 0;
132  u32 thread_index = vm->thread_index;
133 
134  ipsec_alloc_empty_buffers (vm, im);
135 
136  u32 *empty_buffers = im->empty_buffers[thread_index];
137 
138  if (PREDICT_FALSE (vec_len (empty_buffers) < n_left_from))
139  {
141  ESP_ENCRYPT_ERROR_NO_BUFFER, n_left_from);
142  clib_warning ("not enough empty buffers. discarding frame");
143  goto free_buffers_and_exit;
144  }
145 
146  next_index = node->cached_next_index;
147 
148  while (n_left_from > 0)
149  {
150  u32 n_left_to_next;
151 
152  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
153 
154  while (n_left_from > 0 && n_left_to_next > 0)
155  {
156  u32 i_bi0, o_bi0, next0;
157  vlib_buffer_t *i_b0, *o_b0 = 0;
158  u32 sa_index0;
159  ipsec_sa_t *sa0;
160  ip4_and_esp_header_t *oh0 = 0;
161  ip6_and_esp_header_t *ih6_0, *oh6_0 = 0;
162  ip4_and_udp_and_esp_header_t *iuh0, *ouh0 = 0;
163  uword last_empty_buffer;
164  esp_header_t *o_esp0;
165  esp_footer_t *f0;
166  u8 ip_udp_hdr_size;
167  u8 next_hdr_type;
168  u32 ip_proto = 0;
169  u8 transport_mode = 0;
170 
171  i_bi0 = from[0];
172  from += 1;
173  n_left_from -= 1;
174  n_left_to_next -= 1;
175 
176  next0 = ESP_ENCRYPT_NEXT_DROP;
177 
178  i_b0 = vlib_get_buffer (vm, i_bi0);
179  sa_index0 = vnet_buffer (i_b0)->ipsec.sad_index;
180  sa0 = pool_elt_at_index (im->sad, sa_index0);
181 
182  if (PREDICT_FALSE (esp_seq_advance (sa0)))
183  {
184  clib_warning ("sequence number counter has cycled SPI %u",
185  sa0->spi);
187  ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
188  //TODO: rekey SA
189  o_bi0 = i_bi0;
190  to_next[0] = o_bi0;
191  to_next += 1;
192  goto trace;
193  }
194 
195  sa0->total_data_size += i_b0->current_length;
196 
197  /* grab free buffer */
198  last_empty_buffer = vec_len (empty_buffers) - 1;
199  o_bi0 = empty_buffers[last_empty_buffer];
200  o_b0 = vlib_get_buffer (vm, o_bi0);
201  o_b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
202  o_b0->current_data = sizeof (ethernet_header_t);
203  iuh0 = vlib_buffer_get_current (i_b0);
205  empty_buffers[last_empty_buffer -
206  1], STORE);
207  _vec_len (empty_buffers) = last_empty_buffer;
208  to_next[0] = o_bi0;
209  to_next += 1;
210 
211  /* add old buffer to the recycle list */
212  vec_add1 (recycle, i_bi0);
213 
214  if (is_ip6)
215  {
216  ih6_0 = vlib_buffer_get_current (i_b0);
217  next_hdr_type = IP_PROTOCOL_IPV6;
218  oh6_0 = vlib_buffer_get_current (o_b0);
219 
220  oh6_0->ip6.ip_version_traffic_class_and_flow_label =
221  ih6_0->ip6.ip_version_traffic_class_and_flow_label;
222  oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
223  ip_udp_hdr_size = sizeof (ip6_header_t);
224  o_esp0 = vlib_buffer_get_current (o_b0) + ip_udp_hdr_size;
225  oh6_0->ip6.hop_limit = 254;
226  oh6_0->ip6.src_address.as_u64[0] =
227  ih6_0->ip6.src_address.as_u64[0];
228  oh6_0->ip6.src_address.as_u64[1] =
229  ih6_0->ip6.src_address.as_u64[1];
230  oh6_0->ip6.dst_address.as_u64[0] =
231  ih6_0->ip6.dst_address.as_u64[0];
232  oh6_0->ip6.dst_address.as_u64[1] =
233  ih6_0->ip6.dst_address.as_u64[1];
234  o_esp0->spi = clib_net_to_host_u32 (sa0->spi);
235  o_esp0->seq = clib_net_to_host_u32 (sa0->seq);
236  ip_proto = ih6_0->ip6.protocol;
237 
238  next0 = ESP_ENCRYPT_NEXT_IP6_LOOKUP;
239  }
240  else
241  {
242  next_hdr_type = IP_PROTOCOL_IP_IN_IP;
243  oh0 = vlib_buffer_get_current (o_b0);
244  ouh0 = vlib_buffer_get_current (o_b0);
245 
246  oh0->ip4.ip_version_and_header_length = 0x45;
247  oh0->ip4.tos = iuh0->ip4.tos;
248  oh0->ip4.fragment_id = 0;
249  oh0->ip4.flags_and_fragment_offset = 0;
250  oh0->ip4.ttl = 254;
251  if (sa0->udp_encap)
252  {
253  ouh0->udp.src_port =
254  clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
255  ouh0->udp.dst_port =
256  clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
257  ouh0->udp.checksum = 0;
258  ouh0->ip4.protocol = IP_PROTOCOL_UDP;
259  ip_udp_hdr_size =
260  sizeof (udp_header_t) + sizeof (ip4_header_t);
261  }
262  else
263  {
264  oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
265  ip_udp_hdr_size = sizeof (ip4_header_t);
266  }
267  o_esp0 = vlib_buffer_get_current (o_b0) + ip_udp_hdr_size;
268  oh0->ip4.src_address.as_u32 = iuh0->ip4.src_address.as_u32;
269  oh0->ip4.dst_address.as_u32 = iuh0->ip4.dst_address.as_u32;
270  o_esp0->spi = clib_net_to_host_u32 (sa0->spi);
271  o_esp0->seq = clib_net_to_host_u32 (sa0->seq);
272  ip_proto = iuh0->ip4.protocol;
273 
274  next0 = ESP_ENCRYPT_NEXT_IP4_LOOKUP;
275  }
276 
277  if (PREDICT_TRUE (!is_ip6 && sa0->is_tunnel && !sa0->is_tunnel_ip6))
278  {
279  oh0->ip4.src_address.as_u32 = sa0->tunnel_src_addr.ip4.as_u32;
280  oh0->ip4.dst_address.as_u32 = sa0->tunnel_dst_addr.ip4.as_u32;
281 
282  vnet_buffer (o_b0)->sw_if_index[VLIB_TX] = sa0->tx_fib_index;
283  }
284  else if (is_ip6 && sa0->is_tunnel && sa0->is_tunnel_ip6)
285  {
286  oh6_0->ip6.src_address.as_u64[0] =
287  sa0->tunnel_src_addr.ip6.as_u64[0];
288  oh6_0->ip6.src_address.as_u64[1] =
289  sa0->tunnel_src_addr.ip6.as_u64[1];
290  oh6_0->ip6.dst_address.as_u64[0] =
291  sa0->tunnel_dst_addr.ip6.as_u64[0];
292  oh6_0->ip6.dst_address.as_u64[1] =
293  sa0->tunnel_dst_addr.ip6.as_u64[1];
294 
295  vnet_buffer (o_b0)->sw_if_index[VLIB_TX] = sa0->tx_fib_index;
296  }
297  else
298  {
299  next_hdr_type = ip_proto;
300  if (vnet_buffer (i_b0)->sw_if_index[VLIB_TX] != ~0)
301  {
302  transport_mode = 1;
303  ethernet_header_t *ieh0, *oeh0;
304  ieh0 =
305  (ethernet_header_t *) ((u8 *)
306  vlib_buffer_get_current (i_b0) -
307  sizeof (ethernet_header_t));
308  oeh0 = (ethernet_header_t *) o_b0->data;
309  clib_memcpy_fast (oeh0, ieh0, sizeof (ethernet_header_t));
310  next0 = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT;
311  vnet_buffer (o_b0)->sw_if_index[VLIB_TX] =
312  vnet_buffer (i_b0)->sw_if_index[VLIB_TX];
313  }
314 
315  if (is_ip6)
316  {
317  vlib_buffer_advance (i_b0, sizeof (ip6_header_t));
318  }
319  else
320  {
321  vlib_buffer_advance (i_b0, sizeof (ip4_header_t));
322  }
323  }
324 
326 
327  if (PREDICT_TRUE (sa0->crypto_alg != IPSEC_CRYPTO_ALG_NONE))
328  {
329 
330  const int BLOCK_SIZE =
332  const int IV_SIZE =
334  int blocks = 1 + (i_b0->current_length + 1) / BLOCK_SIZE;
335 
336  /* pad packet in input buffer */
337  u8 pad_bytes = BLOCK_SIZE * blocks - 2 - i_b0->current_length;
338  u8 i;
339  u8 *padding =
341  i_b0->current_length = BLOCK_SIZE * blocks;
342  for (i = 0; i < pad_bytes; ++i)
343  {
344  padding[i] = i + 1;
345  }
346  f0 = vlib_buffer_get_current (i_b0) + i_b0->current_length - 2;
347  f0->pad_length = pad_bytes;
348  f0->next_header = next_hdr_type;
349 
350  o_b0->current_length = ip_udp_hdr_size + sizeof (esp_header_t) +
351  BLOCK_SIZE * blocks + IV_SIZE;
352 
353  vnet_buffer (o_b0)->sw_if_index[VLIB_RX] =
354  vnet_buffer (i_b0)->sw_if_index[VLIB_RX];
355 
356  u8 iv[em->
357  ipsec_proto_main_crypto_algs[sa0->crypto_alg].iv_size];
358  RAND_bytes (iv, sizeof (iv));
359 
361  ip_udp_hdr_size + sizeof (esp_header_t), iv,
363  crypto_alg].iv_size);
364 
365  esp_encrypt_cbc (vm, sa0->crypto_alg,
366  (u8 *) vlib_buffer_get_current (i_b0),
367  (u8 *) vlib_buffer_get_current (o_b0) +
368  ip_udp_hdr_size + sizeof (esp_header_t) +
369  IV_SIZE, BLOCK_SIZE * blocks,
370  sa0->crypto_key, iv);
371  }
372 
373  o_b0->current_length += hmac_calc (sa0->integ_alg, sa0->integ_key,
374  sa0->integ_key_len,
375  (u8 *) o_esp0,
376  o_b0->current_length -
377  ip_udp_hdr_size,
378  vlib_buffer_get_current (o_b0) +
379  o_b0->current_length,
380  sa0->use_esn, sa0->seq_hi);
381 
382 
383  if (is_ip6)
384  {
385  oh6_0->ip6.payload_length =
386  clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, o_b0) -
387  sizeof (ip6_header_t));
388  }
389  else
390  {
391  oh0->ip4.length =
392  clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, o_b0));
393  oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
394  if (sa0->udp_encap)
395  {
396  ouh0->udp.length =
397  clib_host_to_net_u16 (clib_net_to_host_u16
398  (oh0->ip4.length) -
399  ip4_header_bytes (&oh0->ip4));
400  }
401  }
402 
403  if (transport_mode)
404  vlib_buffer_reset (o_b0);
405 
406  trace:
407  if (PREDICT_FALSE (i_b0->flags & VLIB_BUFFER_IS_TRACED))
408  {
409  if (o_b0)
410  {
411  o_b0->flags |= VLIB_BUFFER_IS_TRACED;
412  o_b0->trace_index = i_b0->trace_index;
413  esp_encrypt_trace_t *tr =
414  vlib_add_trace (vm, node, o_b0, sizeof (*tr));
415  tr->spi = sa0->spi;
416  tr->seq = sa0->seq - 1;
417  tr->udp_encap = sa0->udp_encap;
418  tr->crypto_alg = sa0->crypto_alg;
419  tr->integ_alg = sa0->integ_alg;
420  }
421  }
422 
423  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
424  to_next, n_left_to_next, o_bi0,
425  next0);
426  }
427  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
428  }
430  ESP_ENCRYPT_ERROR_RX_PKTS,
431  from_frame->n_vectors);
432 
433 free_buffers_and_exit:
434  if (recycle)
435  vlib_buffer_free (vm, recycle, vec_len (recycle));
436  vec_free (recycle);
437  return from_frame->n_vectors;
438 }
439 
441  vlib_node_runtime_t * node,
442  vlib_frame_t * from_frame)
443 {
444  return esp_encrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ );
445 }
446 
447 /* *INDENT-OFF* */
449  .name = "esp4-encrypt",
450  .vector_size = sizeof (u32),
451  .format_trace = format_esp_encrypt_trace,
452  .type = VLIB_NODE_TYPE_INTERNAL,
453 
455  .error_strings = esp_encrypt_error_strings,
456 
457  .n_next_nodes = ESP_ENCRYPT_N_NEXT,
458  .next_nodes = {
459 #define _(s,n) [ESP_ENCRYPT_NEXT_##s] = n,
461 #undef _
462  },
463 };
464 /* *INDENT-ON* */
465 
467  vlib_node_runtime_t * node,
468  vlib_frame_t * from_frame)
469 {
470  return esp_encrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ );
471 }
472 
473 /* *INDENT-OFF* */
475  .name = "esp6-encrypt",
476  .vector_size = sizeof (u32),
477  .format_trace = format_esp_encrypt_trace,
478  .type = VLIB_NODE_TYPE_INTERNAL,
479 
481  .error_strings = esp_encrypt_error_strings,
482 
483  .n_next_nodes = ESP_ENCRYPT_N_NEXT,
484  .next_nodes = {
485 #define _(s,n) [ESP_ENCRYPT_NEXT_##s] = n,
487 #undef _
488  },
489 };
490 /* *INDENT-ON* */
491 
492 /*
493  * fd.io coding-style-patch-verification: ON
494  *
495  * Local Variables:
496  * eval: (c-set-style "gnu")
497  * End:
498  */
EVP_CIPHER_CTX * encrypt_ctx
Definition: ipsec.h:319
static vlib_cli_command_t trace
(constructor) VLIB_CLI_COMMAND (trace)
Definition: vlib_api_cli.c:862
#define CLIB_UNUSED(x)
Definition: clib.h:82
ip46_address_t tunnel_src_addr
Definition: ipsec.h:139
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:262
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:529
#define PREDICT_TRUE(x)
Definition: clib.h:112
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
#define NULL
Definition: clib.h:58
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:280
ipsec_integ_alg_t integ_alg
Definition: ipsec.h:129
u32 thread_index
Definition: main.h:179
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:525
u8 is_tunnel
Definition: ipsec.h:136
static u8 * format_esp_encrypt_trace(u8 *s, va_list *args)
Definition: esp_encrypt.c:74
int i
ipsec_integ_alg_t integ_alg
Definition: esp_encrypt.c:69
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
ipsec_crypto_alg_t crypto_alg
Definition: esp_encrypt.c:68
const EVP_CIPHER * type
Definition: ipsec.h:304
#define VLIB_NODE_FN(node)
Definition: node.h:201
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:267
ipsec_proto_main_crypto_alg_t * ipsec_proto_main_crypto_algs
Definition: ipsec.h:342
unsigned char u8
Definition: types.h:56
u8 crypto_key[128]
Definition: ipsec.h:127
u32 spi
Definition: ipsec.h:122
ipsec_proto_main_t ipsec_proto_main
Definition: esp_encrypt.c:26
u32 seq_hi
Definition: ipsec.h:147
static int esp_seq_advance(ipsec_sa_t *sa)
Definition: esp.h:182
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:110
u8 integ_key[128]
Definition: ipsec.h:131
#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:341
ipsec_main_t ipsec_main
Definition: ipsec.c:30
u32 sw_if_index
Definition: vxlan_gbp.api:37
#define always_inline
Definition: clib.h:98
u8 use_esn
Definition: ipsec.h:133
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:138
esp_encrypt_error_t
Definition: esp_encrypt.c:49
vlib_node_registration_t esp6_encrypt_node
(constructor) VLIB_REGISTER_NODE (esp6_encrypt_node)
Definition: esp_encrypt.c:474
ipsec_proto_main_per_thread_data_t * per_thread_data
Definition: ipsec.h:344
u32 tx_fib_index
Definition: ipsec.h:142
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:511
ipsec_integ_alg_t
Definition: ipsec.h:105
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:114
u8 is_tunnel_ip6
Definition: ipsec.h:137
static uword esp_encrypt_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, int is_ip6)
Definition: esp_encrypt.c:122
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:214
#define PREDICT_FALSE(x)
Definition: clib.h:111
ipsec_crypto_alg_t last_encrypt_alg
Definition: ipsec.h:335
u32 node_index
Node index.
Definition: node.h:518
#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:338
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:1150
ip46_address_t tunnel_dst_addr
Definition: ipsec.h:140
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
u16 n_vectors
Definition: node.h:420
vlib_main_t * vm
Definition: buffer.c:301
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
vlib_node_registration_t esp4_encrypt_node
(constructor) VLIB_REGISTER_NODE (esp4_encrypt_node)
Definition: esp_encrypt.c:448
#define clib_warning(format, args...)
Definition: error.h:59
static void ipsec_alloc_empty_buffers(vlib_main_t *vm, ipsec_main_t *im)
Definition: ipsec.h:469
#define ARRAY_LEN(x)
Definition: clib.h:62
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:452
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:537
#define ASSERT(truth)
ipsec_sa_t * sad
Definition: ipsec.h:353
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:89
ipsec_crypto_alg_t
Definition: ipsec.h:88
u64 total_data_size
Definition: ipsec.h:153
u8 integ_key_len
Definition: ipsec.h:130
u32 seq
Definition: esp.h:24
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:233
u32 spi
Definition: esp.h:23
u32 seq
Definition: ipsec.h:146
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
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:244
#define vnet_buffer(b)
Definition: buffer.h:368
ipsec_crypto_alg_t crypto_alg
Definition: ipsec.h:125
u8 data[0]
Packet data.
Definition: buffer.h:176
static int ip4_header_bytes(const ip4_header_t *i)
Definition: ip4_packet.h:235
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:117
u32 ** empty_buffers
Definition: ipsec.h:359
#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:62
u32 trace_index
Specifies index into trace buffer if VLIB_PACKET_IS_TRACED flag is set.
Definition: buffer.h:151
static u16 ip4_header_checksum(ip4_header_t *i)
Definition: ip4_packet.h:247
Definition: defs.h:46