2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vlib/vlib.h>
17 #include <vnet/vnet.h>
18 #include <vnet/pg/pg.h>
19 #include <vppinfra/error.h>
20 #include <vppinfra/random.h>
21 #include <vnet/udp/udp.h>
22 #include <vnet/ipsec/ipsec.h>
23 #include <vnet/ipsec/ikev2.h>
24 #include <vnet/ipsec/ikev2_priv.h>
25 #include <openssl/sha.h>
27 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
29 ikev2_child_sa_t * child);
31 #define ikev2_set_state(sa, v) do { \
33 clib_warning("sa state changed to " #v); \
43 format_ikev2_trace (u8 * s, va_list * args)
45 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
46 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
47 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
49 s = format (s, "ikev2: sw_if_index %d, next index %d",
50 t->sw_if_index, t->next_index);
54 static vlib_node_registration_t ikev2_node;
56 #define foreach_ikev2_error \
57 _(PROCESSED, "IKEv2 packets processed") \
58 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
59 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
60 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
61 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
62 _(NOT_IKEV2, "Non IKEv2 packets received")
66 #define _(sym,str) IKEV2_ERROR_##sym,
72 static char *ikev2_error_strings[] = {
73 #define _(sym,string) string,
80 IKEV2_NEXT_IP4_LOOKUP,
81 IKEV2_NEXT_ERROR_DROP,
85 static ikev2_sa_transform_t *
86 ikev2_find_transform_data (ikev2_sa_transform_t * t)
88 ikev2_main_t *km = &ikev2_main;
89 ikev2_sa_transform_t *td;
91 vec_foreach (td, km->supported_transforms)
93 if (td->type != t->type)
96 if (td->transform_id != t->transform_id)
99 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
101 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
102 || t->attrs[1] != 14)
105 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
113 static ikev2_sa_proposal_t *
114 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
115 ikev2_protocol_id_t prot_id)
117 ikev2_sa_proposal_t *rv = 0;
118 ikev2_sa_proposal_t *proposal;
119 ikev2_sa_transform_t *transform, *new_t;
120 u8 mandatory_bitmap, optional_bitmap;
122 if (prot_id == IKEV2_PROTOCOL_IKE)
124 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
125 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
126 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
127 optional_bitmap = mandatory_bitmap;
129 else if (prot_id == IKEV2_PROTOCOL_ESP)
131 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
132 (1 << IKEV2_TRANSFORM_TYPE_ESN);
133 optional_bitmap = mandatory_bitmap |
134 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
136 else if (prot_id == IKEV2_PROTOCOL_AH)
138 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
139 (1 << IKEV2_TRANSFORM_TYPE_ESN);
140 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
145 vec_add2 (rv, proposal, 1);
147 vec_foreach (proposal, proposals)
150 if (proposal->protocol_id != prot_id)
153 vec_foreach (transform, proposal->transforms)
155 if ((1 << transform->type) & bitmap)
158 if (ikev2_find_transform_data (transform))
160 bitmap |= 1 << transform->type;
161 vec_add2 (rv->transforms, new_t, 1);
162 clib_memcpy (new_t, transform, sizeof (*new_t));
163 new_t->attrs = vec_dup (transform->attrs);
167 clib_warning ("bitmap is %x mandatory is %x optional is %x",
168 bitmap, mandatory_bitmap, optional_bitmap);
170 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
171 (bitmap & ~optional_bitmap) == 0)
173 rv->proposal_num = proposal->proposal_num;
174 rv->protocol_id = proposal->protocol_id;
175 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
180 vec_free (rv->transforms);
189 ikev2_sa_transform_t *
190 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
191 ikev2_transform_type_t type)
193 ikev2_sa_transform_t *t;
198 vec_foreach (t, p->transforms)
201 return ikev2_find_transform_data (t);
207 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
211 vec_foreach (c, sa->childs)
213 ikev2_sa_proposal_t *proposal =
214 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
215 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
223 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
225 ikev2_sa_proposal_t *p;
226 ikev2_sa_transform_t *t;
233 vec_foreach (t, p->transforms)
237 vec_free (p->transforms);
243 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
246 vec_foreach (c, *childs)
248 ikev2_sa_free_proposal_vector (&c->r_proposals);
249 ikev2_sa_free_proposal_vector (&c->i_proposals);
260 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
262 ikev2_sa_free_proposal_vector (&child->r_proposals);
263 ikev2_sa_free_proposal_vector (&child->i_proposals);
264 vec_free (child->sk_ai);
265 vec_free (child->sk_ar);
266 vec_free (child->sk_ei);
267 vec_free (child->sk_er);
269 vec_del1 (sa->childs, child - sa->childs);
273 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
275 vec_free (sa->i_nonce);
276 vec_free (sa->i_dh_data);
277 vec_free (sa->dh_shared_key);
278 vec_free (sa->dh_private_key);
280 ikev2_sa_free_proposal_vector (&sa->r_proposals);
281 ikev2_sa_free_proposal_vector (&sa->i_proposals);
284 vec_free (sa->sk_ai);
285 vec_free (sa->sk_ar);
286 vec_free (sa->sk_ei);
287 vec_free (sa->sk_er);
288 vec_free (sa->sk_pi);
289 vec_free (sa->sk_pr);
291 vec_free (sa->i_id.data);
292 vec_free (sa->i_auth.data);
293 vec_free (sa->r_id.data);
294 vec_free (sa->r_auth.data);
296 EVP_PKEY_free (sa->r_auth.key);
300 ikev2_sa_free_all_child_sa (&sa->childs);
304 ikev2_delete_sa (ikev2_sa_t * sa)
306 ikev2_main_t *km = &ikev2_main;
307 u32 thread_index = vlib_get_thread_index ();
310 ikev2_sa_free_all_vec (sa);
312 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
315 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
316 pool_put (km->per_thread_data[thread_index].sas, sa);
321 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
323 ikev2_sa_transform_t *t = 0, *t2;
324 ikev2_main_t *km = &ikev2_main;
326 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
331 /* check if received DH group is on our list of supported groups */
332 vec_foreach (t2, km->supported_transforms)
334 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
343 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
344 vec_len (sa->i_dh_data));
345 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
349 if (sa->is_initiator)
352 RAND_bytes ((u8 *) & sa->ispi, 8);
355 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
356 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
361 RAND_bytes ((u8 *) & sa->rspi, 8);
364 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
365 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
368 /* generate dh keys */
369 ikev2_generate_dh (sa, t);
374 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
376 ikev2_sa_transform_t *t = 0, *t2;
377 ikev2_main_t *km = &ikev2_main;
380 /*move some data to the new SA */
381 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
382 sa->i_nonce = _(sai->i_nonce);
383 sa->i_dh_data = _(sai->i_dh_data);
384 sa->dh_private_key = _(sai->dh_private_key);
385 sa->iaddr.as_u32 = sai->iaddr.as_u32;
386 sa->raddr.as_u32 = sai->raddr.as_u32;
387 sa->is_initiator = sai->is_initiator;
388 sa->profile = sai->profile;
389 sa->i_id.type = sai->i_id.type;
390 sa->i_id.data = _(sai->i_id.data);
391 sa->i_auth.method = sai->i_auth.method;
392 sa->i_auth.hex = sai->i_auth.hex;
393 sa->i_auth.data = _(sai->i_auth.data);
394 sa->i_auth.key = _(sai->i_auth.key);
395 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
396 sa->childs = _(sai->childs);
400 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
405 /* check if received DH group is on our list of supported groups */
406 vec_foreach (t2, km->supported_transforms)
408 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
417 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
418 vec_len (sa->i_dh_data));
419 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
424 /* generate dh keys */
425 ikev2_complete_dh (sa, t);
430 ikev2_calc_keys (ikev2_sa_t * sa)
433 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
436 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
438 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
440 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
442 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
444 vec_append (s, sa->i_nonce);
445 vec_append (s, sa->r_nonce);
446 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
448 /* Calculate S = Ni | Nr | SPIi | SPIr */
450 vec_add2 (s, tmp, 2 * sizeof (*spi));
452 spi[0] = clib_host_to_net_u64 (sa->ispi);
453 spi[1] = clib_host_to_net_u64 (sa->rspi);
455 /* calculate PRFplus */
457 int len = tr_prf->key_trunc + /* SK_d */
458 tr_integ->key_len * 2 + /* SK_ai, SK_ar */
459 tr_encr->key_len * 2 + /* SK_ei, SK_er */
460 tr_prf->key_len * 2; /* SK_pi, SK_pr */
462 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
469 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
470 clib_memcpy (sa->sk_d, keymat + pos, tr_prf->key_trunc);
471 pos += tr_prf->key_trunc;
474 sa->sk_ai = vec_new (u8, tr_integ->key_len);
475 clib_memcpy (sa->sk_ai, keymat + pos, tr_integ->key_len);
476 pos += tr_integ->key_len;
479 sa->sk_ar = vec_new (u8, tr_integ->key_len);
480 clib_memcpy (sa->sk_ar, keymat + pos, tr_integ->key_len);
481 pos += tr_integ->key_len;
484 sa->sk_ei = vec_new (u8, tr_encr->key_len);
485 clib_memcpy (sa->sk_ei, keymat + pos, tr_encr->key_len);
486 pos += tr_encr->key_len;
489 sa->sk_er = vec_new (u8, tr_encr->key_len);
490 clib_memcpy (sa->sk_er, keymat + pos, tr_encr->key_len);
491 pos += tr_encr->key_len;
494 sa->sk_pi = vec_new (u8, tr_prf->key_len);
495 clib_memcpy (sa->sk_pi, keymat + pos, tr_prf->key_len);
496 pos += tr_prf->key_len;
499 sa->sk_pr = vec_new (u8, tr_prf->key_len);
500 clib_memcpy (sa->sk_pr, keymat + pos, tr_prf->key_len);
501 pos += tr_prf->key_len;
507 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
510 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
512 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
514 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
516 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
518 vec_append (s, sa->i_nonce);
519 vec_append (s, sa->r_nonce);
520 /* calculate PRFplus */
522 int len = ctr_encr->key_len * 2 + ctr_integ->key_len * 2;
524 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
529 child->sk_ei = vec_new (u8, ctr_encr->key_len);
530 clib_memcpy (child->sk_ei, keymat + pos, ctr_encr->key_len);
531 pos += ctr_encr->key_len;
534 child->sk_ai = vec_new (u8, ctr_integ->key_len);
535 clib_memcpy (child->sk_ai, keymat + pos, ctr_integ->key_len);
536 pos += ctr_integ->key_len;
539 child->sk_er = vec_new (u8, ctr_encr->key_len);
540 clib_memcpy (child->sk_er, keymat + pos, ctr_encr->key_len);
541 pos += ctr_encr->key_len;
544 child->sk_ar = vec_new (u8, ctr_integ->key_len);
545 clib_memcpy (child->sk_ar, keymat + pos, ctr_integ->key_len);
546 pos += ctr_integ->key_len;
554 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
558 u32 len = clib_net_to_host_u32 (ike->length);
559 u8 payload = ike->nextpayload;
561 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
562 "exchange %x flags %x msgid %x length %u",
563 clib_net_to_host_u64 (ike->ispi),
564 clib_net_to_host_u64 (ike->rspi),
565 payload, ike->version,
566 ike->exchange, ike->flags,
567 clib_net_to_host_u32 (ike->msgid), len);
569 sa->ispi = clib_net_to_host_u64 (ike->ispi);
571 /* store whole IKE payload - needed for PSK auth */
572 vec_free (sa->last_sa_init_req_packet_data);
573 vec_add (sa->last_sa_init_req_packet_data, ike, len);
575 while (p < len && payload != IKEV2_PAYLOAD_NONE)
577 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
578 u32 plen = clib_net_to_host_u16 (ikep->length);
580 if (plen < sizeof (ike_payload_header_t))
583 if (payload == IKEV2_PAYLOAD_SA)
585 ikev2_sa_free_proposal_vector (&sa->i_proposals);
586 sa->i_proposals = ikev2_parse_sa_payload (ikep);
588 else if (payload == IKEV2_PAYLOAD_KE)
590 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
591 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
592 vec_free (sa->i_dh_data);
593 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
595 else if (payload == IKEV2_PAYLOAD_NONCE)
597 vec_free (sa->i_nonce);
598 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
600 else if (payload == IKEV2_PAYLOAD_NOTIFY)
602 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
605 else if (payload == IKEV2_PAYLOAD_VENDOR)
607 ikev2_parse_vendor_payload (ikep);
611 clib_warning ("unknown payload %u flags %x length %u", payload,
613 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
615 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
616 sa->unsupported_cp = payload;
621 payload = ikep->nextpayload;
625 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
629 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
633 u32 len = clib_net_to_host_u32 (ike->length);
634 u8 payload = ike->nextpayload;
636 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
637 "exchange %x flags %x msgid %x length %u",
638 clib_net_to_host_u64 (ike->ispi),
639 clib_net_to_host_u64 (ike->rspi),
640 payload, ike->version,
641 ike->exchange, ike->flags,
642 clib_net_to_host_u32 (ike->msgid), len);
644 sa->ispi = clib_net_to_host_u64 (ike->ispi);
645 sa->rspi = clib_net_to_host_u64 (ike->rspi);
647 /* store whole IKE payload - needed for PSK auth */
648 vec_free (sa->last_sa_init_res_packet_data);
649 vec_add (sa->last_sa_init_res_packet_data, ike, len);
651 while (p < len && payload != IKEV2_PAYLOAD_NONE)
653 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
654 u32 plen = clib_net_to_host_u16 (ikep->length);
656 if (plen < sizeof (ike_payload_header_t))
659 if (payload == IKEV2_PAYLOAD_SA)
661 ikev2_sa_free_proposal_vector (&sa->r_proposals);
662 sa->r_proposals = ikev2_parse_sa_payload (ikep);
665 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
667 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
670 else if (payload == IKEV2_PAYLOAD_KE)
672 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
673 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
674 vec_free (sa->r_dh_data);
675 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
677 else if (payload == IKEV2_PAYLOAD_NONCE)
679 vec_free (sa->r_nonce);
680 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
682 else if (payload == IKEV2_PAYLOAD_NOTIFY)
684 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
687 else if (payload == IKEV2_PAYLOAD_VENDOR)
689 ikev2_parse_vendor_payload (ikep);
693 clib_warning ("unknown payload %u flags %x length %u", payload,
695 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
697 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
698 sa->unsupported_cp = payload;
703 payload = ikep->nextpayload;
709 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
714 u32 len = clib_net_to_host_u32 (ike->length);
715 ike_payload_header_t *ikep = 0;
717 ikev2_sa_transform_t *tr_integ;
719 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
722 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
724 ikep = (ike_payload_header_t *) & ike->payload[p];
725 plen = clib_net_to_host_u16 (ikep->length);
727 if (plen < sizeof (*ikep))
730 if (*payload == IKEV2_PAYLOAD_SK)
732 clib_warning ("received IKEv2 payload SK, len %u", plen - 4);
733 last_payload = *payload;
737 clib_warning ("unknown payload %u flags %x length %u", payload,
739 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
741 sa->unsupported_cp = *payload;
746 *payload = ikep->nextpayload;
750 if (last_payload != IKEV2_PAYLOAD_SK)
752 clib_warning ("Last payload must be SK");
757 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
758 (u8 *) ike, len - tr_integ->key_trunc);
760 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
762 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
764 clib_warning ("message integrity check failed");
770 return ikev2_decrypt_data (sa, ikep->payload, plen);
774 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
776 ikev2_main_t *km = &ikev2_main;
780 u32 thread_index = vlib_get_thread_index ();
782 if (!sa->initial_contact)
785 /* find old IKE SAs with the same authenticated identity */
787 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
788 if (tmp->i_id.type != sa->i_id.type ||
789 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
790 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
793 if (sa->rspi != tmp->rspi)
794 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
798 for (i = 0; i < vec_len (delete); i++)
801 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
803 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
805 ikev2_delete_sa (tmp);
809 sa->initial_contact = 0;
813 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
815 ikev2_child_sa_t *first_child_sa;
817 u32 len = clib_net_to_host_u32 (ike->length);
818 u8 payload = ike->nextpayload;
821 ike_payload_header_t *ikep;
824 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
825 "exchange %x flags %x msgid %x length %u",
826 clib_net_to_host_u64 (ike->ispi),
827 clib_net_to_host_u64 (ike->rspi),
828 payload, ike->version,
829 ike->exchange, ike->flags,
830 clib_net_to_host_u32 (ike->msgid), len);
832 ikev2_calc_keys (sa);
834 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
838 if (sa->unsupported_cp)
839 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
840 goto cleanup_and_exit;
843 /* select or create 1st child SA */
844 if (sa->is_initiator)
846 first_child_sa = &sa->childs[0];
850 ikev2_sa_free_all_child_sa (&sa->childs);
851 vec_add2 (sa->childs, first_child_sa, 1);
855 /* process encrypted payload */
857 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
859 ikep = (ike_payload_header_t *) & plaintext[p];
860 plen = clib_net_to_host_u16 (ikep->length);
862 if (plen < sizeof (ike_payload_header_t))
863 goto cleanup_and_exit;
865 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
867 clib_warning ("received payload SA, len %u", plen - sizeof (*ikep));
868 if (sa->is_initiator)
870 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
871 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
875 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
876 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
879 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
881 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
883 sa->i_id.type = id->id_type;
884 vec_free (sa->i_id.data);
885 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
887 clib_warning ("received payload IDi, len %u id_type %u",
888 plen - sizeof (*id), id->id_type);
890 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
892 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
894 sa->r_id.type = id->id_type;
895 vec_free (sa->r_id.data);
896 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
898 clib_warning ("received payload IDr len %u id_type %u",
899 plen - sizeof (*id), id->id_type);
901 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
903 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
905 if (sa->is_initiator)
907 sa->r_auth.method = a->auth_method;
908 vec_free (sa->r_auth.data);
909 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
913 sa->i_auth.method = a->auth_method;
914 vec_free (sa->i_auth.data);
915 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
918 clib_warning ("received payload AUTH, len %u auth_type %u",
919 plen - sizeof (*a), a->auth_method);
921 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
923 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
924 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
926 sa->initial_contact = 1;
930 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
932 ikev2_parse_vendor_payload (ikep);
934 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
936 clib_warning ("received payload TSi, len %u",
937 plen - sizeof (*ikep));
939 vec_free (first_child_sa->tsi);
940 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
942 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
944 clib_warning ("received payload TSr, len %u",
945 plen - sizeof (*ikep));
947 vec_free (first_child_sa->tsr);
948 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
952 clib_warning ("unknown payload %u flags %x length %u data %u",
953 payload, ikep->flags, plen - 4,
954 format_hex_bytes, ikep->payload, plen - 4);
956 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
958 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
959 sa->unsupported_cp = payload;
964 payload = ikep->nextpayload;
969 vec_free (plaintext);
973 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
977 u32 len = clib_net_to_host_u32 (ike->length);
978 u8 payload = ike->nextpayload;
981 ike_payload_header_t *ikep;
984 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
985 "exchange %x flags %x msgid %x length %u",
986 clib_net_to_host_u64 (ike->ispi),
987 clib_net_to_host_u64 (ike->rspi),
988 payload, ike->version,
989 ike->exchange, ike->flags,
990 clib_net_to_host_u32 (ike->msgid), len);
992 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
995 goto cleanup_and_exit;
997 /* process encrypted payload */
999 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1001 ikep = (ike_payload_header_t *) & plaintext[p];
1002 plen = clib_net_to_host_u16 (ikep->length);
1004 if (plen < sizeof (ike_payload_header_t))
1005 goto cleanup_and_exit;
1007 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1009 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1010 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1011 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1014 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1016 sa->del = ikev2_parse_delete_payload (ikep);
1018 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1020 ikev2_parse_vendor_payload (ikep);
1024 clib_warning ("unknown payload %u flags %x length %u data %u",
1025 payload, ikep->flags, plen - 4,
1026 format_hex_bytes, ikep->payload, plen - 4);
1028 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1030 sa->unsupported_cp = payload;
1035 payload = ikep->nextpayload;
1040 vec_free (plaintext);
1044 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1048 u32 len = clib_net_to_host_u32 (ike->length);
1049 u8 payload = ike->nextpayload;
1052 u8 nonce[IKEV2_NONCE_SIZE];
1054 ike_payload_header_t *ikep;
1056 ikev2_notify_t *n = 0;
1057 ikev2_ts_t *tsi = 0;
1058 ikev2_ts_t *tsr = 0;
1059 ikev2_sa_proposal_t *proposal = 0;
1060 ikev2_child_sa_t *child_sa;
1062 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
1063 "exchange %x flags %x msgid %x length %u",
1064 clib_net_to_host_u64 (ike->ispi),
1065 clib_net_to_host_u64 (ike->rspi),
1066 payload, ike->version,
1067 ike->exchange, ike->flags,
1068 clib_net_to_host_u32 (ike->msgid), len);
1070 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1073 goto cleanup_and_exit;
1075 /* process encrypted payload */
1077 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1079 ikep = (ike_payload_header_t *) & plaintext[p];
1080 plen = clib_net_to_host_u16 (ikep->length);
1082 if (plen < sizeof (ike_payload_header_t))
1083 goto cleanup_and_exit;
1085 else if (payload == IKEV2_PAYLOAD_SA)
1087 proposal = ikev2_parse_sa_payload (ikep);
1089 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1091 n = ikev2_parse_notify_payload (ikep);
1092 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1097 else if (payload == IKEV2_PAYLOAD_DELETE)
1099 sa->del = ikev2_parse_delete_payload (ikep);
1101 else if (payload == IKEV2_PAYLOAD_VENDOR)
1103 ikev2_parse_vendor_payload (ikep);
1105 else if (payload == IKEV2_PAYLOAD_NONCE)
1107 clib_memcpy (nonce, ikep->payload, plen - sizeof (*ikep));
1109 else if (payload == IKEV2_PAYLOAD_TSI)
1111 tsi = ikev2_parse_ts_payload (ikep);
1113 else if (payload == IKEV2_PAYLOAD_TSR)
1115 tsr = ikev2_parse_ts_payload (ikep);
1119 clib_warning ("unknown payload %u flags %x length %u data %u",
1120 payload, ikep->flags, plen - 4,
1121 format_hex_bytes, ikep->payload, plen - 4);
1123 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1125 sa->unsupported_cp = payload;
1130 payload = ikep->nextpayload;
1134 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1136 ikev2_rekey_t *rekey = &sa->rekey[0];
1137 rekey->protocol_id = proposal->protocol_id;
1139 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1140 rekey->i_proposal->spi = rekey->spi;
1141 rekey->r_proposal = proposal;
1145 vec_free (sa->r_nonce);
1146 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1147 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1150 child_sa->rekey_retries = 0;
1155 ikev2_rekey_t *rekey;
1156 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1159 clib_warning ("child SA spi %lx not found", n->spi);
1160 goto cleanup_and_exit;
1162 vec_add2 (sa->rekey, rekey, 1);
1163 rekey->protocol_id = n->protocol_id;
1164 rekey->spi = n->spi;
1165 rekey->i_proposal = proposal;
1167 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1171 vec_free (sa->i_nonce);
1172 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1173 /* generate new Nr */
1174 vec_free (sa->r_nonce);
1175 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1176 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1180 vec_free (plaintext);
1185 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1193 ikev2_sa_transform_t *tr_prf;
1196 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1202 nonce = sa->i_nonce;
1203 packet_data = sa->last_sa_init_res_packet_data;
1209 nonce = sa->r_nonce;
1210 packet_data = sa->last_sa_init_req_packet_data;
1213 data = vec_new (u8, 4);
1215 vec_append (data, id->data);
1217 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1218 vec_append (authmsg, packet_data);
1219 vec_append (authmsg, nonce);
1220 vec_append (authmsg, id_hash);
1228 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1230 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1231 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1232 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1233 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1240 ikev2_sa_match_ts (ikev2_sa_t * sa)
1242 ikev2_main_t *km = &ikev2_main;
1244 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1248 pool_foreach (p, km->profiles, ({
1250 if (sa->is_initiator)
1264 if (p->rem_id.type != id->type ||
1265 vec_len(p->rem_id.data) != vec_len(id->data) ||
1266 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1269 vec_foreach(ts, sa->childs[0].tsi)
1271 if (ikev2_ts_cmp(p_tsi, ts))
1278 vec_foreach(ts, sa->childs[0].tsr)
1280 if (ikev2_ts_cmp(p_tsr, ts))
1293 vec_free (sa->childs[0].tsi);
1294 vec_free (sa->childs[0].tsr);
1295 sa->childs[0].tsi = tsi;
1296 sa->childs[0].tsr = tsr;
1302 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1307 ikev2_sa_auth (ikev2_sa_t * sa)
1309 ikev2_main_t *km = &ikev2_main;
1310 ikev2_profile_t *p, *sel_p = 0;
1311 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1312 ikev2_sa_transform_t *tr_prf;
1315 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1317 /* only shared key and rsa signature */
1318 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1319 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1321 clib_warning ("unsupported authentication method %u",
1323 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1327 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1328 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1331 ikev2_auth_t *sa_auth;
1333 if (sa->is_initiator)
1336 sa_auth = &sa->r_auth;
1341 sa_auth = &sa->i_auth;
1345 pool_foreach (p, km->profiles, ({
1348 if (p->rem_id.type != sa_id->type ||
1349 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1350 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1353 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1355 if (!p->auth.data ||
1356 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1359 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1360 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1362 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1364 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1371 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1373 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1376 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1378 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1391 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1393 if (!sa->is_initiator)
1395 vec_free (sa->r_id.data);
1396 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1397 sa->r_id.type = sel_p->loc_id.type;
1399 /* generate our auth data */
1400 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1401 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1403 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1404 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1406 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1408 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1409 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1413 /* select transforms for 1st child sa */
1414 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1415 sa->childs[0].r_proposals =
1416 ikev2_select_proposal (sa->childs[0].i_proposals,
1417 IKEV2_PROTOCOL_ESP);
1422 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1430 ikev2_sa_auth_init (ikev2_sa_t * sa)
1432 ikev2_main_t *km = &ikev2_main;
1433 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1434 ikev2_sa_transform_t *tr_prf;
1437 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1439 /* only shared key and rsa signature */
1440 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1441 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1443 clib_warning ("unsupported authentication method %u",
1445 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1449 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1450 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1451 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1452 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1455 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1457 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1458 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1460 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1462 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1463 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1474 ikev2_create_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1475 ikev2_child_sa_t * child)
1477 ipsec_add_del_tunnel_args_t a;
1478 ikev2_sa_transform_t *tr;
1479 ikev2_sa_proposal_t *proposals;
1482 if (!child->r_proposals)
1484 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1488 memset (&a, 0, sizeof (a));
1490 if (sa->is_initiator)
1492 a.local_ip.as_u32 = sa->iaddr.as_u32;
1493 a.remote_ip.as_u32 = sa->raddr.as_u32;
1494 proposals = child->i_proposals;
1495 a.local_spi = child->r_proposals[0].spi;
1496 a.remote_spi = child->i_proposals[0].spi;
1500 a.local_ip.as_u32 = sa->raddr.as_u32;
1501 a.remote_ip.as_u32 = sa->iaddr.as_u32;
1502 proposals = child->r_proposals;
1503 a.local_spi = child->i_proposals[0].spi;
1504 a.remote_spi = child->r_proposals[0].spi;
1508 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1510 a.esn = tr->esn_type;
1514 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1517 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1519 switch (tr->key_len)
1522 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1525 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1528 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1531 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1538 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1544 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1548 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1551 if (tr->integ_type != IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96)
1553 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1559 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1563 ikev2_calc_child_keys (sa, child);
1565 u8 *loc_ckey, *rem_ckey, *loc_ikey, *rem_ikey;
1566 if (sa->is_initiator)
1568 loc_ikey = child->sk_ai;
1569 rem_ikey = child->sk_ar;
1570 loc_ckey = child->sk_ei;
1571 rem_ckey = child->sk_er;
1575 loc_ikey = child->sk_ar;
1576 rem_ikey = child->sk_ai;
1577 loc_ckey = child->sk_er;
1578 rem_ckey = child->sk_ei;
1581 a.integ_alg = IPSEC_INTEG_ALG_SHA1_96;
1582 a.local_integ_key_len = vec_len (loc_ikey);
1583 clib_memcpy (a.local_integ_key, loc_ikey, a.local_integ_key_len);
1584 a.remote_integ_key_len = vec_len (rem_ikey);
1585 clib_memcpy (a.remote_integ_key, rem_ikey, a.remote_integ_key_len);
1587 a.crypto_alg = encr_type;
1588 a.local_crypto_key_len = vec_len (loc_ckey);
1589 clib_memcpy (a.local_crypto_key, loc_ckey, a.local_crypto_key_len);
1590 a.remote_crypto_key_len = vec_len (rem_ckey);
1591 clib_memcpy (a.remote_crypto_key, rem_ckey, a.remote_crypto_key_len);
1593 if (sa->profile && sa->profile->lifetime)
1595 child->time_to_expiration = vlib_time_now (vnm->vlib_main)
1596 + sa->profile->lifetime;
1597 if (sa->profile->lifetime_jitter)
1599 // This is not much better than rand(3), which Coverity warns
1600 // is unsuitable for security applications; random_u32 is
1601 // however fast. If this perturbance to the expiration time
1602 // needs to use a better RNG then we may need to use something
1603 // like /dev/urandom which has significant overhead.
1604 u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1605 rnd = random_u32 (&rnd);
1607 child->time_to_expiration +=
1608 1 + (rnd % sa->profile->lifetime_jitter);
1612 ipsec_add_del_tunnel_if (&a);
1618 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1619 ikev2_child_sa_t * child)
1621 ipsec_add_del_tunnel_args_t a;
1623 if (sa->is_initiator)
1625 if (!vec_len (child->i_proposals))
1629 a.local_ip.as_u32 = sa->iaddr.as_u32;
1630 a.remote_ip.as_u32 = sa->raddr.as_u32;
1631 a.local_spi = child->r_proposals[0].spi;
1632 a.remote_spi = child->i_proposals[0].spi;
1636 if (!vec_len (child->r_proposals))
1640 a.local_ip.as_u32 = sa->raddr.as_u32;
1641 a.remote_ip.as_u32 = sa->iaddr.as_u32;
1642 a.local_spi = child->i_proposals[0].spi;
1643 a.remote_spi = child->r_proposals[0].spi;
1646 ipsec_add_del_tunnel_if (&a);
1651 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1654 ike_payload_header_t *ph;
1658 ikev2_sa_transform_t *tr_encr, *tr_integ;
1660 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1662 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1664 ikev2_payload_chain_t *chain = 0;
1665 ikev2_payload_new_chain (chain);
1667 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1669 if (sa->r_proposals == 0)
1671 ikev2_payload_add_notify (chain,
1672 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1673 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1675 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1677 u8 *data = vec_new (u8, 2);
1678 ikev2_sa_transform_t *tr_dh;
1680 ikev2_sa_get_td_for_type (sa->r_proposals,
1681 IKEV2_TRANSFORM_TYPE_DH);
1682 ASSERT (tr_dh && tr_dh->dh_type);
1684 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1685 data[1] = (tr_dh->dh_type) & 0xff;
1687 ikev2_payload_add_notify (chain,
1688 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1691 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1693 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1695 u8 *data = vec_new (u8, 1);
1697 data[0] = sa->unsupported_cp;
1698 ikev2_payload_add_notify (chain,
1699 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1705 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1706 ikev2_payload_add_sa (chain, sa->r_proposals);
1707 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1708 ikev2_payload_add_nonce (chain, sa->r_nonce);
1711 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1713 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1715 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1716 ikev2_payload_add_auth (chain, &sa->r_auth);
1717 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1718 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1719 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1721 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1723 ikev2_payload_add_notify (chain,
1724 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1726 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1728 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1730 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1732 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1733 ikev2_payload_add_auth (chain, &sa->r_auth);
1735 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1737 ikev2_payload_add_notify (chain,
1738 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1739 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1740 ikev2_payload_add_auth (chain, &sa->r_auth);
1741 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1742 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1744 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1746 u8 *data = vec_new (u8, 1);
1748 data[0] = sa->unsupported_cp;
1749 ikev2_payload_add_notify (chain,
1750 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1754 else if (sa->state == IKEV2_STATE_SA_INIT)
1756 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1757 ikev2_payload_add_auth (chain, &sa->i_auth);
1758 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1759 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1760 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1764 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1768 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1770 /* if pending delete */
1773 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1775 if (sa->is_initiator)
1776 ikev2_payload_add_delete (chain, sa->del);
1778 /* The response to a request that deletes the IKE SA is an empty
1779 INFORMATIONAL response. */
1780 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1782 /* The response to a request that deletes ESP or AH SAs will contain
1783 delete payloads for the paired SAs going in the other direction. */
1786 ikev2_payload_add_delete (chain, sa->del);
1791 /* received N(AUTHENTICATION_FAILED) */
1792 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1794 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1797 /* received unsupported critical payload */
1798 else if (sa->unsupported_cp)
1800 u8 *data = vec_new (u8, 1);
1802 data[0] = sa->unsupported_cp;
1803 ikev2_payload_add_notify (chain,
1804 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1807 sa->unsupported_cp = 0;
1809 /* else send empty response */
1811 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1813 if (sa->is_initiator)
1816 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
1817 ikev2_notify_t notify;
1818 u8 *data = vec_new (u8, 4);
1819 memset (¬ify, 0, sizeof (notify));
1820 notify.protocol_id = IKEV2_PROTOCOL_ESP;
1821 notify.spi = sa->childs[0].i_proposals->spi;
1822 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
1824 ikev2_payload_add_sa (chain, proposals);
1825 ikev2_payload_add_nonce (chain, sa->i_nonce);
1826 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1827 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1828 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
1837 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
1838 ikev2_payload_add_nonce (chain, sa->r_nonce);
1839 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
1841 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
1843 vec_del1 (sa->rekey, 0);
1845 else if (sa->unsupported_cp)
1847 u8 *data = vec_new (u8, 1);
1849 data[0] = sa->unsupported_cp;
1850 ikev2_payload_add_notify (chain,
1851 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1854 sa->unsupported_cp = 0;
1858 ikev2_payload_add_notify (chain,
1859 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
1866 ike->version = IKE_VERSION_2;
1867 ike->nextpayload = IKEV2_PAYLOAD_SK;
1868 tlen = sizeof (*ike);
1869 if (sa->is_initiator)
1871 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
1872 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
1876 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
1880 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1882 tlen += vec_len (chain->data);
1883 ike->nextpayload = chain->first_payload_type;
1884 ike->length = clib_host_to_net_u32 (tlen);
1885 clib_memcpy (ike->payload, chain->data, vec_len (chain->data));
1887 /* store whole IKE payload - needed for PSK auth */
1888 vec_free (sa->last_sa_init_res_packet_data);
1889 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
1894 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
1897 plen = sizeof (*ph);
1898 ph = (ike_payload_header_t *) & ike->payload[0];
1899 ph->nextpayload = chain->first_payload_type;
1901 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
1904 /* add space for hmac */
1905 plen += tr_integ->key_trunc;
1908 /* payload and total length */
1909 ph->length = clib_host_to_net_u16 (plen);
1910 ike->length = clib_host_to_net_u32 (tlen);
1912 /* calc integrity data for whole packet except hash itself */
1914 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
1915 (u8 *) ike, tlen - tr_integ->key_trunc);
1917 clib_memcpy (ike->payload + tlen - tr_integ->key_trunc - sizeof (*ike),
1918 integ, tr_integ->key_trunc);
1920 /* store whole IKE payload - needed for retransmit */
1921 vec_free (sa->last_res_packet_data);
1922 vec_add (sa->last_res_packet_data, ike, tlen);
1926 ikev2_payload_destroy_chain (chain);
1932 ikev2_retransmit_sa_init (ike_header_t * ike,
1933 ip4_address_t iaddr, ip4_address_t raddr)
1935 ikev2_main_t *km = &ikev2_main;
1937 u32 thread_index = vlib_get_thread_index ();
1940 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
1941 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
1942 sa->iaddr.as_u32 == iaddr.as_u32 &&
1943 sa->raddr.as_u32 == raddr.as_u32)
1946 u32 len = clib_net_to_host_u32(ike->length);
1947 u8 payload = ike->nextpayload;
1949 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
1950 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
1951 u32 plen = clib_net_to_host_u16(ikep->length);
1953 if (plen < sizeof(ike_payload_header_t))
1956 if (payload == IKEV2_PAYLOAD_NONCE)
1958 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
1960 /* req is retransmit */
1961 if (sa->state == IKEV2_STATE_SA_INIT)
1964 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
1965 ike->ispi = tmp->ispi;
1966 ike->rspi = tmp->rspi;
1967 ike->nextpayload = tmp->nextpayload;
1968 ike->version = tmp->version;
1969 ike->exchange = tmp->exchange;
1970 ike->flags = tmp->flags;
1971 ike->msgid = tmp->msgid;
1972 ike->length = tmp->length;
1973 clib_memcpy(ike->payload, tmp->payload,
1974 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
1975 clib_warning("IKE_SA_INIT retransmit from %U to %U",
1976 format_ip4_address, &raddr,
1977 format_ip4_address, &iaddr);
1980 /* else ignore req */
1983 clib_warning("IKE_SA_INIT ignore from %U to %U",
1984 format_ip4_address, &raddr,
1985 format_ip4_address, &iaddr);
1990 payload = ikep->nextpayload;
1997 /* req is not retransmit */
2002 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2004 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2007 if (msg_id > sa->last_msg_id)
2009 sa->last_msg_id = msg_id;
2012 /* retransmitted req */
2013 else if (msg_id == sa->last_msg_id)
2016 tmp = (ike_header_t *) sa->last_res_packet_data;
2017 ike->ispi = tmp->ispi;
2018 ike->rspi = tmp->rspi;
2019 ike->nextpayload = tmp->nextpayload;
2020 ike->version = tmp->version;
2021 ike->exchange = tmp->exchange;
2022 ike->flags = tmp->flags;
2023 ike->msgid = tmp->msgid;
2024 ike->length = tmp->length;
2025 clib_memcpy (ike->payload, tmp->payload,
2026 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2027 clib_warning ("IKE msgid %u retransmit from %U to %U",
2029 format_ip4_address, &sa->raddr,
2030 format_ip4_address, &sa->iaddr);
2033 /* old req ignore */
2036 clib_warning ("IKE msgid %u req ignore from %U to %U",
2038 format_ip4_address, &sa->raddr,
2039 format_ip4_address, &sa->iaddr);
2045 ikev2_node_fn (vlib_main_t * vm,
2046 vlib_node_runtime_t * node, vlib_frame_t * frame)
2048 u32 n_left_from, *from, *to_next;
2049 ikev2_next_t next_index;
2050 ikev2_main_t *km = &ikev2_main;
2051 u32 thread_index = vlib_get_thread_index ();
2053 from = vlib_frame_vector_args (frame);
2054 n_left_from = frame->n_vectors;
2055 next_index = node->cached_next_index;
2057 while (n_left_from > 0)
2061 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2063 while (n_left_from > 0 && n_left_to_next > 0)
2067 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2072 ikev2_sa_t *sa0 = 0;
2073 ikev2_sa_t sa; /* temporary store for SA */
2077 /* speculatively enqueue b0 to the current next frame */
2083 n_left_to_next -= 1;
2085 b0 = vlib_get_buffer (vm, bi0);
2086 ike0 = vlib_buffer_get_current (b0);
2087 vlib_buffer_advance (b0, -sizeof (*udp0));
2088 udp0 = vlib_buffer_get_current (b0);
2089 vlib_buffer_advance (b0, -sizeof (*ip40));
2090 ip40 = vlib_buffer_get_current (b0);
2092 if (ike0->version != IKE_VERSION_2)
2094 vlib_node_increment_counter (vm, ikev2_node.index,
2095 IKEV2_ERROR_NOT_IKEV2, 1);
2099 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2102 memset (sa0, 0, sizeof (*sa0));
2104 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2106 if (ike0->rspi == 0)
2108 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2109 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2111 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2115 vlib_node_increment_counter (vm, ikev2_node.index,
2116 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2118 len = clib_net_to_host_u32 (ike0->length);
2123 vlib_node_increment_counter (vm, ikev2_node.index,
2124 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2129 ikev2_process_sa_init_req (vm, sa0, ike0);
2131 if (sa0->state == IKEV2_STATE_SA_INIT)
2133 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2135 ikev2_select_proposal (sa0->i_proposals,
2136 IKEV2_PROTOCOL_IKE);
2137 ikev2_generate_sa_init_data (sa0);
2140 if (sa0->state == IKEV2_STATE_SA_INIT
2141 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2143 len = ikev2_generate_message (sa0, ike0, 0);
2146 if (sa0->state == IKEV2_STATE_SA_INIT)
2148 /* add SA to the pool */
2149 pool_get (km->per_thread_data[thread_index].sas,
2151 clib_memcpy (sa0, &sa, sizeof (*sa0));
2153 per_thread_data[thread_index].sa_by_rspi,
2156 km->per_thread_data[thread_index].sas);
2160 ikev2_sa_free_all_vec (sa0);
2166 ikev2_process_sa_init_resp (vm, sa0, ike0);
2168 if (sa0->state == IKEV2_STATE_SA_INIT)
2170 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2171 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2175 pool_elt_at_index (km->sais, p[0]);
2177 ikev2_complete_sa_data (sa0, sai);
2178 ikev2_calc_keys (sa0);
2179 ikev2_sa_auth_init (sa0);
2180 len = ikev2_generate_message (sa0, ike0, 0);
2184 if (sa0->state == IKEV2_STATE_SA_INIT)
2186 /* add SA to the pool */
2187 pool_get (km->per_thread_data[thread_index].sas, sa0);
2188 clib_memcpy (sa0, &sa, sizeof (*sa0));
2189 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2191 sa0 - km->per_thread_data[thread_index].sas);
2195 ikev2_sa_free_all_vec (sa0);
2199 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2202 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2203 clib_net_to_host_u64 (ike0->rspi));
2207 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2210 r = ikev2_retransmit_resp (sa0, ike0);
2213 vlib_node_increment_counter (vm, ikev2_node.index,
2214 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2216 len = clib_net_to_host_u32 (ike0->length);
2221 vlib_node_increment_counter (vm, ikev2_node.index,
2222 IKEV2_ERROR_IKE_REQ_IGNORE,
2227 ikev2_process_auth_req (vm, sa0, ike0);
2228 ikev2_sa_auth (sa0);
2229 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2231 ikev2_initial_contact_cleanup (sa0);
2232 ikev2_sa_match_ts (sa0);
2233 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2234 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2238 if (sa0->is_initiator)
2240 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2244 pool_elt_at_index (km->sais, p[0]);
2245 hash_unset (km->sa_by_ispi, sai->ispi);
2246 ikev2_sa_free_all_vec (sai);
2247 pool_put (km->sais, sai);
2252 len = ikev2_generate_message (sa0, ike0, 0);
2256 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2259 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2260 clib_net_to_host_u64 (ike0->rspi));
2264 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2267 r = ikev2_retransmit_resp (sa0, ike0);
2270 vlib_node_increment_counter (vm, ikev2_node.index,
2271 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2273 len = clib_net_to_host_u32 (ike0->length);
2278 vlib_node_increment_counter (vm, ikev2_node.index,
2279 IKEV2_ERROR_IKE_REQ_IGNORE,
2284 ikev2_process_informational_req (vm, sa0, ike0);
2287 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2289 ikev2_delete_t *d, *tmp, *resp = 0;
2290 vec_foreach (d, sa0->del)
2292 ikev2_child_sa_t *ch_sa;
2293 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2295 !sa0->is_initiator);
2298 ikev2_delete_tunnel_interface (km->vnet_main,
2300 if (!sa0->is_initiator)
2302 vec_add2 (resp, tmp, 1);
2303 tmp->protocol_id = d->protocol_id;
2304 tmp->spi = ch_sa->r_proposals[0].spi;
2306 ikev2_sa_del_child_sa (sa0, ch_sa);
2309 if (!sa0->is_initiator)
2311 vec_free (sa0->del);
2316 if (!sa0->is_initiator)
2318 len = ikev2_generate_message (sa0, ike0, 0);
2322 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2325 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2326 clib_net_to_host_u64 (ike0->rspi));
2330 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2333 r = ikev2_retransmit_resp (sa0, ike0);
2336 vlib_node_increment_counter (vm, ikev2_node.index,
2337 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2339 len = clib_net_to_host_u32 (ike0->length);
2344 vlib_node_increment_counter (vm, ikev2_node.index,
2345 IKEV2_ERROR_IKE_REQ_IGNORE,
2350 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2353 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2355 ikev2_child_sa_t *child;
2356 vec_add2 (sa0->childs, child, 1);
2357 child->r_proposals = sa0->rekey[0].r_proposal;
2358 child->i_proposals = sa0->rekey[0].i_proposal;
2359 child->tsi = sa0->rekey[0].tsi;
2360 child->tsr = sa0->rekey[0].tsr;
2361 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2364 if (sa0->is_initiator)
2366 vec_del1 (sa0->rekey, 0);
2370 len = ikev2_generate_message (sa0, ike0, 0);
2377 clib_warning ("IKEv2 exchange %u packet received from %U to %U",
2379 format_ip4_address, ip40->src_address.as_u8,
2380 format_ip4_address, ip40->dst_address.as_u8);
2384 /* if we are sending packet back, rewrite headers */
2387 next0 = IKEV2_NEXT_IP4_LOOKUP;
2388 if (sa0->is_initiator)
2390 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2391 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2395 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2396 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2399 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2401 b0->current_length =
2402 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2403 ip40->length = clib_host_to_net_u16 (b0->current_length);
2404 ip40->checksum = ip4_header_checksum (ip40);
2407 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2408 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2410 ikev2_child_sa_t *c;
2412 vec_foreach (c, sa0->childs)
2413 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2415 ikev2_delete_sa (sa0);
2417 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2419 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2420 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2422 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2423 t->sw_if_index = sw_if_index0;
2424 t->next_index = next0;
2427 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2428 n_left_to_next, bi0, next0);
2431 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2434 vlib_node_increment_counter (vm, ikev2_node.index,
2435 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2436 return frame->n_vectors;
2440 VLIB_REGISTER_NODE (ikev2_node,static) = {
2441 .function = ikev2_node_fn,
2443 .vector_size = sizeof (u32),
2444 .format_trace = format_ikev2_trace,
2445 .type = VLIB_NODE_TYPE_INTERNAL,
2447 .n_errors = ARRAY_LEN(ikev2_error_strings),
2448 .error_strings = ikev2_error_strings,
2450 .n_next_nodes = IKEV2_N_NEXT,
2453 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2454 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2460 static clib_error_t *
2461 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2462 ikev2_transforms_set * ts,
2463 ikev2_sa_proposal_t ** proposals, int is_ike)
2466 ikev2_main_t *km = &ikev2_main;
2467 ikev2_sa_proposal_t *proposal;
2468 vec_add2 (*proposals, proposal, 1);
2469 ikev2_sa_transform_t *td;
2474 vec_foreach (td, km->supported_transforms)
2476 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2477 && td->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC
2478 && td->key_len == ts->crypto_key_size / 8)
2481 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2482 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2483 vec_add (td->attrs, (u8 *) attr, 4);
2484 vec_add1 (proposal->transforms, *td);
2493 r = clib_error_return (0, "Unsupported algorithm");
2499 vec_foreach (td, km->supported_transforms)
2501 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2502 && td->integ_type == IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96)
2504 vec_add1 (proposal->transforms, *td);
2511 r = clib_error_return (0, "Unsupported algorithm");
2519 vec_foreach (td, km->supported_transforms)
2521 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2522 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA1)
2524 vec_add1 (proposal->transforms, *td);
2531 r = clib_error_return (0, "Unsupported algorithm");
2538 vec_foreach (td, km->supported_transforms)
2540 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2542 vec_add1 (proposal->transforms, *td);
2545 sa->dh_group = td->dh_type;
2553 r = clib_error_return (0, "Unsupported algorithm");
2560 vec_foreach (td, km->supported_transforms)
2562 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2564 vec_add1 (proposal->transforms, *td);
2571 r = clib_error_return (0, "Unsupported algorithm");
2580 static ikev2_profile_t *
2581 ikev2_profile_index_by_name (u8 * name)
2583 ikev2_main_t *km = &ikev2_main;
2586 p = mhash_get (&km->profile_index_by_name, name);
2590 return pool_elt_at_index (km->profiles, p[0]);
2595 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2604 b0 = vlib_get_buffer (vm, bi0);
2605 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2606 udp0 = vlib_buffer_get_current (b0);
2607 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2608 ip40 = vlib_buffer_get_current (b0);
2611 ip40->ip_version_and_header_length = 0x45;
2613 ip40->fragment_id = 0;
2614 ip40->flags_and_fragment_offset = 0;
2616 ip40->protocol = IP_PROTOCOL_UDP;
2617 ip40->dst_address.as_u32 = dst->as_u32;
2618 ip40->src_address.as_u32 = src->as_u32;
2619 udp0->dst_port = clib_host_to_net_u16 (500);
2620 udp0->src_port = clib_host_to_net_u16 (500);
2621 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2623 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2624 ip40->length = clib_host_to_net_u16 (b0->current_length);
2625 ip40->checksum = ip4_header_checksum (ip40);
2628 /* send the request */
2629 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2630 to_next = vlib_frame_vector_args (f);
2633 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2638 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2641 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2646 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2647 *ike = vlib_buffer_get_current (b0);
2652 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2654 ikev2_main_t *km = &ikev2_main;
2656 km->pkey = ikev2_load_key_file (file);
2657 if (km->pkey == NULL)
2658 return clib_error_return (0, "load key '%s' failed", file);
2664 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2666 ikev2_main_t *km = &ikev2_main;
2671 if (ikev2_profile_index_by_name (name))
2672 return clib_error_return (0, "policy %v already exists", name);
2674 pool_get (km->profiles, p);
2675 memset (p, 0, sizeof (*p));
2676 p->name = vec_dup (name);
2677 p->responder.sw_if_index = ~0;
2678 uword index = p - km->profiles;
2679 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2683 p = ikev2_profile_index_by_name (name);
2685 return clib_error_return (0, "policy %v does not exists", name);
2688 pool_put (km->profiles, p);
2689 mhash_unset (&km->profile_index_by_name, name, 0);
2695 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2696 u8 * auth_data, u8 data_hex_format)
2701 p = ikev2_profile_index_by_name (name);
2705 r = clib_error_return (0, "unknown profile %v", name);
2708 vec_free (p->auth.data);
2709 p->auth.method = auth_method;
2710 p->auth.data = vec_dup (auth_data);
2711 p->auth.hex = data_hex_format;
2713 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2715 vec_add1 (p->auth.data, 0);
2717 EVP_PKEY_free (p->auth.key);
2718 p->auth.key = ikev2_load_cert_file (auth_data);
2719 if (p->auth.key == NULL)
2720 return clib_error_return (0, "load cert '%s' failed", auth_data);
2727 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2733 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2734 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2736 r = clib_error_return (0, "unsupported identity type %U",
2737 format_ikev2_id_type, id_type);
2741 p = ikev2_profile_index_by_name (name);
2745 r = clib_error_return (0, "unknown profile %v", name);
2751 vec_free (p->loc_id.data);
2752 p->loc_id.type = id_type;
2753 p->loc_id.data = vec_dup (data);
2757 vec_free (p->rem_id.data);
2758 p->rem_id.type = id_type;
2759 p->rem_id.data = vec_dup (data);
2766 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2767 u16 start_port, u16 end_port, ip4_address_t start_addr,
2768 ip4_address_t end_addr, int is_local)
2773 p = ikev2_profile_index_by_name (name);
2777 r = clib_error_return (0, "unknown profile %v", name);
2783 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2784 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2785 p->loc_ts.start_port = start_port;
2786 p->loc_ts.end_port = end_port;
2787 p->loc_ts.protocol_id = protocol_id;
2788 p->loc_ts.ts_type = 7;
2792 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2793 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2794 p->rem_ts.start_port = start_port;
2795 p->rem_ts.end_port = end_port;
2796 p->rem_ts.protocol_id = protocol_id;
2797 p->rem_ts.ts_type = 7;
2805 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
2806 u32 sw_if_index, ip4_address_t ip4)
2811 p = ikev2_profile_index_by_name (name);
2815 r = clib_error_return (0, "unknown profile %v", name);
2819 p->responder.sw_if_index = sw_if_index;
2820 p->responder.ip4 = ip4;
2826 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
2827 ikev2_transform_encr_type_t crypto_alg,
2828 ikev2_transform_integ_type_t integ_alg,
2829 ikev2_transform_dh_type_t dh_type,
2830 u32 crypto_key_size)
2835 p = ikev2_profile_index_by_name (name);
2839 r = clib_error_return (0, "unknown profile %v", name);
2843 p->ike_ts.crypto_alg = crypto_alg;
2844 p->ike_ts.integ_alg = integ_alg;
2845 p->ike_ts.dh_type = dh_type;
2846 p->ike_ts.crypto_key_size = crypto_key_size;
2851 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
2852 ikev2_transform_encr_type_t crypto_alg,
2853 ikev2_transform_integ_type_t integ_alg,
2854 ikev2_transform_dh_type_t dh_type,
2855 u32 crypto_key_size)
2860 p = ikev2_profile_index_by_name (name);
2864 r = clib_error_return (0, "unknown profile %v", name);
2868 p->esp_ts.crypto_alg = crypto_alg;
2869 p->esp_ts.integ_alg = integ_alg;
2870 p->esp_ts.dh_type = dh_type;
2871 p->esp_ts.crypto_key_size = crypto_key_size;
2876 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
2877 u64 lifetime, u32 jitter, u32 handover,
2883 p = ikev2_profile_index_by_name (name);
2887 r = clib_error_return (0, "unknown profile %v", name);
2891 p->lifetime = lifetime;
2892 p->lifetime_jitter = jitter;
2893 p->handover = handover;
2894 p->lifetime_maxdata = maxdata;
2899 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
2903 ip4_main_t *im = &ip4_main;
2904 ikev2_main_t *km = &ikev2_main;
2906 p = ikev2_profile_index_by_name (name);
2910 r = clib_error_return (0, "unknown profile %v", name);
2914 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
2916 r = clib_error_return (0, "responder not set for profile %v", name);
2921 /* Create the Initiator Request */
2925 ip_lookup_main_t *lm = &im->lookup_main;
2927 int len = sizeof (ike_header_t);
2929 /* Get own iface IP */
2931 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
2932 ip_interface_address_t *if_add =
2933 pool_elt_at_index (lm->if_address_pool, if_add_index0);
2934 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
2936 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
2938 /* Prepare the SA and the IKE payload */
2940 memset (&sa, 0, sizeof (ikev2_sa_t));
2941 ikev2_payload_chain_t *chain = 0;
2942 ikev2_payload_new_chain (chain);
2944 /* Build the IKE proposal payload */
2945 ikev2_sa_proposal_t *proposals = 0;
2946 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
2947 proposals[0].proposal_num = 1;
2948 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
2950 /* Add and then cleanup proposal data */
2951 ikev2_payload_add_sa (chain, proposals);
2952 ikev2_sa_free_proposal_vector (&proposals);
2954 sa.is_initiator = 1;
2956 sa.state = IKEV2_STATE_SA_INIT;
2957 ikev2_generate_sa_init_data (&sa);
2958 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
2959 ikev2_payload_add_nonce (chain, sa.i_nonce);
2961 /* Build the child SA proposal */
2962 vec_resize (sa.childs, 1);
2963 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
2964 &sa.childs[0].i_proposals, 0);
2965 sa.childs[0].i_proposals[0].proposal_num = 1;
2966 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
2967 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
2968 sizeof (sa.childs[0].i_proposals[0].spi));
2972 /* Add NAT detection notification messages (mandatory) */
2973 u8 nat_detection_source[8 + 8 + 4 + 2];
2974 u8 *nat_detection_sha1 = vec_new (u8, 20);
2976 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
2977 clib_memcpy (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
2978 tmpspi = clib_host_to_net_u64 (sa.rspi);
2979 clib_memcpy (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
2980 u16 tmpport = clib_host_to_net_u16 (500);
2981 clib_memcpy (&nat_detection_source[8 + 8 + 4], &tmpport,
2983 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
2984 clib_memcpy (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
2985 SHA1 (nat_detection_source, sizeof (nat_detection_source),
2986 nat_detection_sha1);
2987 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2988 nat_detection_sha1);
2989 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
2990 clib_memcpy (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
2991 SHA1 (nat_detection_source, sizeof (nat_detection_source),
2992 nat_detection_sha1);
2993 ikev2_payload_add_notify (chain,
2994 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2995 nat_detection_sha1);
2996 vec_free (nat_detection_sha1);
2998 u8 *sig_hash_algo = vec_new (u8, 8);
2999 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3000 clib_memcpy (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3001 ikev2_payload_add_notify (chain,
3002 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3004 vec_free (sig_hash_algo);
3007 /* Buffer update and bolierplate */
3008 len += vec_len (chain->data);
3009 ike0->nextpayload = chain->first_payload_type;
3010 ike0->length = clib_host_to_net_u32 (len);
3011 clib_memcpy (ike0->payload, chain->data, vec_len (chain->data));
3012 ikev2_payload_destroy_chain (chain);
3014 ike0->version = IKE_VERSION_2;
3015 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3016 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3017 ike0->ispi = sa.ispi;
3019 /* store whole IKE payload - needed for PSK auth */
3020 vec_free (sa.last_sa_init_req_packet_data);
3021 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3023 /* add data to the SA then add it to the pool */
3024 sa.iaddr.as_u32 = if_ip->as_u32;
3025 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3026 sa.i_id.type = p->loc_id.type;
3027 sa.i_id.data = vec_dup (p->loc_id.data);
3028 sa.i_auth.method = p->auth.method;
3029 sa.i_auth.hex = p->auth.hex;
3030 sa.i_auth.data = vec_dup (p->auth.data);
3031 sa.i_auth.key = vec_dup (p->auth.key);
3032 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3033 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3035 /* add SA to the pool */
3036 ikev2_sa_t *sa0 = 0;
3037 pool_get (km->sais, sa0);
3038 clib_memcpy (sa0, &sa, sizeof (*sa0));
3039 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3041 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3049 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3050 ikev2_child_sa_t * csa)
3052 /* Create the Initiator notification for child SA removal */
3053 ikev2_main_t *km = &ikev2_main;
3058 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3061 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3062 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3063 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3064 vec_resize (sa->del, 1);
3065 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3066 sa->del->spi = csa->i_proposals->spi;
3067 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3068 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3069 len = ikev2_generate_message (sa, ike0, 0);
3071 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3073 /* delete local child SA */
3074 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3075 ikev2_sa_del_child_sa (sa, csa);
3079 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3082 ikev2_main_t *km = &ikev2_main;
3083 ikev2_main_per_thread_data_t *tkm;
3084 ikev2_sa_t *fsa = 0;
3085 ikev2_child_sa_t *fchild = 0;
3087 /* Search for the child SA */
3088 vec_foreach (tkm, km->per_thread_data)
3094 pool_foreach (sa, tkm->sas, ({
3095 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3105 if (!fchild || !fsa)
3107 r = clib_error_return (0, "Child SA not found");
3112 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3119 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3122 ikev2_main_t *km = &ikev2_main;
3123 ikev2_main_per_thread_data_t *tkm;
3124 ikev2_sa_t *fsa = 0;
3125 ikev2_main_per_thread_data_t *ftkm = 0;
3127 /* Search for the IKE SA */
3128 vec_foreach (tkm, km->per_thread_data)
3134 pool_foreach (sa, tkm->sas, ({
3135 if (sa->ispi == ispi)
3147 r = clib_error_return (0, "IKE SA not found");
3152 /* Create the Initiator notification for IKE SA removal */
3158 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3161 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3162 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3163 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3164 vec_resize (fsa->del, 1);
3165 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3166 fsa->del->spi = ispi;
3167 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3168 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3169 len = ikev2_generate_message (fsa, ike0, 0);
3171 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3175 /* delete local SA */
3176 ikev2_child_sa_t *c;
3177 vec_foreach (c, fsa->childs)
3179 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3180 ikev2_sa_del_child_sa (fsa, c);
3182 ikev2_sa_free_all_vec (fsa);
3183 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3186 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3187 pool_put (ftkm->sas, fsa);
3195 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3196 ikev2_child_sa_t * csa)
3198 /* Create the Initiator request for create child SA */
3204 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3207 ike0->version = IKE_VERSION_2;
3208 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3209 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3210 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3211 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3212 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3213 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3215 ikev2_rekey_t *rekey;
3216 vec_add2 (sa->rekey, rekey, 1);
3217 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3220 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3221 rekey->spi = proposals[0].spi;
3222 rekey->ispi = csa->i_proposals->spi;
3223 len = ikev2_generate_message (sa, ike0, proposals);
3224 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3225 vec_free (proposals);
3229 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3232 ikev2_main_t *km = &ikev2_main;
3233 ikev2_main_per_thread_data_t *tkm;
3234 ikev2_sa_t *fsa = 0;
3235 ikev2_child_sa_t *fchild = 0;
3237 /* Search for the child SA */
3238 vec_foreach (tkm, km->per_thread_data)
3244 pool_foreach (sa, tkm->sas, ({
3245 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3255 if (!fchild || !fsa)
3257 r = clib_error_return (0, "Child SA not found");
3262 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3269 ikev2_init (vlib_main_t * vm)
3271 ikev2_main_t *km = &ikev2_main;
3272 clib_error_t *error;
3273 vlib_thread_main_t *tm = vlib_get_thread_main ();
3276 memset (km, 0, sizeof (ikev2_main_t));
3277 km->vnet_main = vnet_get_main ();
3280 ikev2_crypto_init (km);
3282 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3284 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3285 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3287 km->per_thread_data[thread_id].sa_by_rspi =
3288 hash_create (0, sizeof (uword));
3291 km->sa_by_ispi = hash_create (0, sizeof (uword));
3294 if ((error = vlib_call_init_function (vm, ikev2_cli_init)))
3297 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3304 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3306 ikev2_main_t *km = &ikev2_main;
3307 vlib_main_t *vm = km->vlib_main;
3308 f64 now = vlib_time_now (vm);
3311 if (sa->is_initiator && sa->profile && csa->time_to_expiration
3312 && now > csa->time_to_expiration)
3314 if (!csa->is_expired || csa->rekey_retries > 0)
3316 ikev2_rekey_child_sa_internal (vm, sa, csa);
3317 csa->time_to_expiration = now + sa->profile->handover;
3318 csa->is_expired = 1;
3319 if (csa->rekey_retries == 0)
3321 csa->rekey_retries = 5;
3323 else if (csa->rekey_retries > 0)
3325 csa->rekey_retries--;
3326 clib_warning ("Rekeing Child SA 0x%x, retries left %d",
3327 csa->i_proposals->spi, csa->rekey_retries);
3328 if (csa->rekey_retries == 0)
3330 csa->rekey_retries = -1;
3337 csa->time_to_expiration = 0;
3338 ikev2_delete_child_sa_internal (vm, sa, csa);
3347 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3349 ikev2_main_t *km = &ikev2_main;
3350 vlib_main_t *vm = km->vlib_main;
3351 ikev2_main_per_thread_data_t *tkm;
3352 ikev2_sa_t *fsa = 0;
3353 ikev2_child_sa_t *fchild = 0;
3354 f64 now = vlib_time_now (vm);
3356 /* Search for the SA and child SA */
3357 vec_foreach (tkm, km->per_thread_data)
3363 pool_foreach (sa, tkm->sas, ({
3364 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3374 if (fchild && fsa && fsa->profile && fsa->profile->lifetime_maxdata)
3376 if (!fchild->is_expired
3377 && ipsec_sa->total_data_size > fsa->profile->lifetime_maxdata)
3379 fchild->time_to_expiration = now;
3384 static vlib_node_registration_t ikev2_mngr_process_node;
3387 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3390 ikev2_main_t *km = &ikev2_main;
3391 ipsec_main_t *im = &ipsec_main;
3396 vlib_process_wait_for_event_or_clock (vm, 1);
3397 vlib_process_get_events (vm, NULL);
3399 /* process ike child sas */
3400 ikev2_main_per_thread_data_t *tkm;
3401 vec_foreach (tkm, km->per_thread_data)
3405 pool_foreach (sa, tkm->sas, ({
3406 ikev2_child_sa_t *c;
3407 vec_foreach (c, sa->childs)
3409 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3415 /* process ipsec sas */
3418 pool_foreach (sa, im->sad, ({
3419 ikev2_mngr_process_ipsec_sa(sa);
3425 vlib_process_wait_for_event_or_clock (vm, 5);
3426 vlib_process_get_events (vm, NULL);
3435 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3436 .function = ikev2_mngr_process_fn,
3437 .type = VLIB_NODE_TYPE_PROCESS,
3439 "ikev2-manager-process",
3445 * fd.io coding-style-patch-verification: ON
3448 * eval: (c-set-style "gnu")