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 <vnet/udp/udp.h>
21 #include <vnet/ipsec/ipsec.h>
22 #include <vnet/ipsec/ikev2.h>
23 #include <vnet/ipsec/ikev2_priv.h>
24 #include <openssl/sha.h>
26 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
28 ikev2_child_sa_t * child);
30 #define ikev2_set_state(sa, v) do { \
32 clib_warning("sa state changed to " #v); \
42 format_ikev2_trace (u8 * s, va_list * args)
44 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
45 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
46 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
48 s = format (s, "ikev2: sw_if_index %d, next index %d",
49 t->sw_if_index, t->next_index);
53 static vlib_node_registration_t ikev2_node;
55 #define foreach_ikev2_error \
56 _(PROCESSED, "IKEv2 packets processed") \
57 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
58 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
59 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
60 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
61 _(NOT_IKEV2, "Non IKEv2 packets received")
65 #define _(sym,str) IKEV2_ERROR_##sym,
71 static char *ikev2_error_strings[] = {
72 #define _(sym,string) string,
79 IKEV2_NEXT_IP4_LOOKUP,
80 IKEV2_NEXT_ERROR_DROP,
84 static ikev2_sa_transform_t *
85 ikev2_find_transform_data (ikev2_sa_transform_t * t)
87 ikev2_main_t *km = &ikev2_main;
88 ikev2_sa_transform_t *td;
90 vec_foreach (td, km->supported_transforms)
92 if (td->type != t->type)
95 if (td->transform_id != t->transform_id)
98 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
100 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
101 || t->attrs[1] != 14)
104 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
112 static ikev2_sa_proposal_t *
113 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
114 ikev2_protocol_id_t prot_id)
116 ikev2_sa_proposal_t *rv = 0;
117 ikev2_sa_proposal_t *proposal;
118 ikev2_sa_transform_t *transform, *new_t;
119 u8 mandatory_bitmap, optional_bitmap;
121 if (prot_id == IKEV2_PROTOCOL_IKE)
123 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
124 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
125 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
126 optional_bitmap = mandatory_bitmap;
128 else if (prot_id == IKEV2_PROTOCOL_ESP)
130 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
131 (1 << IKEV2_TRANSFORM_TYPE_ESN);
132 optional_bitmap = mandatory_bitmap |
133 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
135 else if (prot_id == IKEV2_PROTOCOL_AH)
137 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
138 (1 << IKEV2_TRANSFORM_TYPE_ESN);
139 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
144 vec_add2 (rv, proposal, 1);
146 vec_foreach (proposal, proposals)
149 if (proposal->protocol_id != prot_id)
152 vec_foreach (transform, proposal->transforms)
154 if ((1 << transform->type) & bitmap)
157 if (ikev2_find_transform_data (transform))
159 bitmap |= 1 << transform->type;
160 vec_add2 (rv->transforms, new_t, 1);
161 clib_memcpy (new_t, transform, sizeof (*new_t));
162 new_t->attrs = vec_dup (transform->attrs);
166 clib_warning ("bitmap is %x mandatory is %x optional is %x",
167 bitmap, mandatory_bitmap, optional_bitmap);
169 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
170 (bitmap & ~optional_bitmap) == 0)
172 rv->proposal_num = proposal->proposal_num;
173 rv->protocol_id = proposal->protocol_id;
174 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
179 vec_free (rv->transforms);
188 ikev2_sa_transform_t *
189 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
190 ikev2_transform_type_t type)
192 ikev2_sa_transform_t *t;
197 vec_foreach (t, p->transforms)
200 return ikev2_find_transform_data (t);
206 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
210 vec_foreach (c, sa->childs)
212 ikev2_sa_proposal_t *proposal =
213 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
214 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
222 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
224 ikev2_sa_proposal_t *p;
225 ikev2_sa_transform_t *t;
232 vec_foreach (t, p->transforms)
236 vec_free (p->transforms);
242 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
245 vec_foreach (c, *childs)
247 ikev2_sa_free_proposal_vector (&c->r_proposals);
248 ikev2_sa_free_proposal_vector (&c->i_proposals);
259 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
261 ikev2_sa_free_proposal_vector (&child->r_proposals);
262 ikev2_sa_free_proposal_vector (&child->i_proposals);
263 vec_free (child->sk_ai);
264 vec_free (child->sk_ar);
265 vec_free (child->sk_ei);
266 vec_free (child->sk_er);
268 vec_del1 (sa->childs, child - sa->childs);
272 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
274 vec_free (sa->i_nonce);
275 vec_free (sa->i_dh_data);
276 vec_free (sa->dh_shared_key);
277 vec_free (sa->dh_private_key);
279 ikev2_sa_free_proposal_vector (&sa->r_proposals);
280 ikev2_sa_free_proposal_vector (&sa->i_proposals);
283 vec_free (sa->sk_ai);
284 vec_free (sa->sk_ar);
285 vec_free (sa->sk_ei);
286 vec_free (sa->sk_er);
287 vec_free (sa->sk_pi);
288 vec_free (sa->sk_pr);
290 vec_free (sa->i_id.data);
291 vec_free (sa->i_auth.data);
292 vec_free (sa->r_id.data);
293 vec_free (sa->r_auth.data);
295 EVP_PKEY_free (sa->r_auth.key);
299 ikev2_sa_free_all_child_sa (&sa->childs);
303 ikev2_delete_sa (ikev2_sa_t * sa)
305 ikev2_main_t *km = &ikev2_main;
306 u32 thread_index = vlib_get_thread_index ();
309 ikev2_sa_free_all_vec (sa);
311 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
314 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
315 pool_put (km->per_thread_data[thread_index].sas, sa);
320 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
322 ikev2_sa_transform_t *t = 0, *t2;
323 ikev2_main_t *km = &ikev2_main;
325 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
330 /* check if received DH group is on our list of supported groups */
331 vec_foreach (t2, km->supported_transforms)
333 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
342 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
343 vec_len (sa->i_dh_data));
344 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
348 if (sa->is_initiator)
351 RAND_bytes ((u8 *) & sa->ispi, 8);
354 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
355 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
360 RAND_bytes ((u8 *) & sa->rspi, 8);
363 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
364 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
367 /* generate dh keys */
368 ikev2_generate_dh (sa, t);
373 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
375 ikev2_sa_transform_t *t = 0, *t2;
376 ikev2_main_t *km = &ikev2_main;
379 /*move some data to the new SA */
380 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
381 sa->i_nonce = _(sai->i_nonce);
382 sa->i_dh_data = _(sai->i_dh_data);
383 sa->dh_private_key = _(sai->dh_private_key);
384 sa->iaddr.as_u32 = sai->iaddr.as_u32;
385 sa->raddr.as_u32 = sai->raddr.as_u32;
386 sa->is_initiator = sai->is_initiator;
387 sa->profile = sai->profile;
388 sa->i_id.type = sai->i_id.type;
389 sa->i_id.data = _(sai->i_id.data);
390 sa->i_auth.method = sai->i_auth.method;
391 sa->i_auth.hex = sai->i_auth.hex;
392 sa->i_auth.data = _(sai->i_auth.data);
393 sa->i_auth.key = _(sai->i_auth.key);
394 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
395 sa->childs = _(sai->childs);
399 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
404 /* check if received DH group is on our list of supported groups */
405 vec_foreach (t2, km->supported_transforms)
407 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
416 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
417 vec_len (sa->i_dh_data));
418 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
423 /* generate dh keys */
424 ikev2_complete_dh (sa, t);
429 ikev2_calc_keys (ikev2_sa_t * sa)
432 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
435 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
437 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
439 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
441 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
443 vec_append (s, sa->i_nonce);
444 vec_append (s, sa->r_nonce);
445 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
447 /* Calculate S = Ni | Nr | SPIi | SPIr */
449 vec_add2 (s, tmp, 2 * sizeof (*spi));
451 spi[0] = clib_host_to_net_u64 (sa->ispi);
452 spi[1] = clib_host_to_net_u64 (sa->rspi);
454 /* calculate PRFplus */
456 int len = tr_prf->key_trunc + /* SK_d */
457 tr_integ->key_len * 2 + /* SK_ai, SK_ar */
458 tr_encr->key_len * 2 + /* SK_ei, SK_er */
459 tr_prf->key_len * 2; /* SK_pi, SK_pr */
461 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
468 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
469 clib_memcpy (sa->sk_d, keymat + pos, tr_prf->key_trunc);
470 pos += tr_prf->key_trunc;
473 sa->sk_ai = vec_new (u8, tr_integ->key_len);
474 clib_memcpy (sa->sk_ai, keymat + pos, tr_integ->key_len);
475 pos += tr_integ->key_len;
478 sa->sk_ar = vec_new (u8, tr_integ->key_len);
479 clib_memcpy (sa->sk_ar, keymat + pos, tr_integ->key_len);
480 pos += tr_integ->key_len;
483 sa->sk_ei = vec_new (u8, tr_encr->key_len);
484 clib_memcpy (sa->sk_ei, keymat + pos, tr_encr->key_len);
485 pos += tr_encr->key_len;
488 sa->sk_er = vec_new (u8, tr_encr->key_len);
489 clib_memcpy (sa->sk_er, keymat + pos, tr_encr->key_len);
490 pos += tr_encr->key_len;
493 sa->sk_pi = vec_new (u8, tr_prf->key_len);
494 clib_memcpy (sa->sk_pi, keymat + pos, tr_prf->key_len);
495 pos += tr_prf->key_len;
498 sa->sk_pr = vec_new (u8, tr_prf->key_len);
499 clib_memcpy (sa->sk_pr, keymat + pos, tr_prf->key_len);
500 pos += tr_prf->key_len;
506 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
509 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
511 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
513 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
515 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
517 vec_append (s, sa->i_nonce);
518 vec_append (s, sa->r_nonce);
519 /* calculate PRFplus */
521 int len = ctr_encr->key_len * 2 + ctr_integ->key_len * 2;
523 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
528 child->sk_ei = vec_new (u8, ctr_encr->key_len);
529 clib_memcpy (child->sk_ei, keymat + pos, ctr_encr->key_len);
530 pos += ctr_encr->key_len;
533 child->sk_ai = vec_new (u8, ctr_integ->key_len);
534 clib_memcpy (child->sk_ai, keymat + pos, ctr_integ->key_len);
535 pos += ctr_integ->key_len;
538 child->sk_er = vec_new (u8, ctr_encr->key_len);
539 clib_memcpy (child->sk_er, keymat + pos, ctr_encr->key_len);
540 pos += ctr_encr->key_len;
543 child->sk_ar = vec_new (u8, ctr_integ->key_len);
544 clib_memcpy (child->sk_ar, keymat + pos, ctr_integ->key_len);
545 pos += ctr_integ->key_len;
553 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
557 u32 len = clib_net_to_host_u32 (ike->length);
558 u8 payload = ike->nextpayload;
560 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
561 "exchange %x flags %x msgid %x length %u",
562 clib_net_to_host_u64 (ike->ispi),
563 clib_net_to_host_u64 (ike->rspi),
564 payload, ike->version,
565 ike->exchange, ike->flags,
566 clib_net_to_host_u32 (ike->msgid), len);
568 sa->ispi = clib_net_to_host_u64 (ike->ispi);
570 /* store whole IKE payload - needed for PSK auth */
571 vec_free (sa->last_sa_init_req_packet_data);
572 vec_add (sa->last_sa_init_req_packet_data, ike, len);
574 while (p < len && payload != IKEV2_PAYLOAD_NONE)
576 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
577 u32 plen = clib_net_to_host_u16 (ikep->length);
579 if (plen < sizeof (ike_payload_header_t))
582 if (payload == IKEV2_PAYLOAD_SA)
584 ikev2_sa_free_proposal_vector (&sa->i_proposals);
585 sa->i_proposals = ikev2_parse_sa_payload (ikep);
587 else if (payload == IKEV2_PAYLOAD_KE)
589 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
590 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
591 vec_free (sa->i_dh_data);
592 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
594 else if (payload == IKEV2_PAYLOAD_NONCE)
596 vec_free (sa->i_nonce);
597 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
599 else if (payload == IKEV2_PAYLOAD_NOTIFY)
601 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
604 else if (payload == IKEV2_PAYLOAD_VENDOR)
606 ikev2_parse_vendor_payload (ikep);
610 clib_warning ("unknown payload %u flags %x length %u", payload,
612 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
614 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
615 sa->unsupported_cp = payload;
620 payload = ikep->nextpayload;
624 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
628 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
632 u32 len = clib_net_to_host_u32 (ike->length);
633 u8 payload = ike->nextpayload;
635 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
636 "exchange %x flags %x msgid %x length %u",
637 clib_net_to_host_u64 (ike->ispi),
638 clib_net_to_host_u64 (ike->rspi),
639 payload, ike->version,
640 ike->exchange, ike->flags,
641 clib_net_to_host_u32 (ike->msgid), len);
643 sa->ispi = clib_net_to_host_u64 (ike->ispi);
644 sa->rspi = clib_net_to_host_u64 (ike->rspi);
646 /* store whole IKE payload - needed for PSK auth */
647 vec_free (sa->last_sa_init_res_packet_data);
648 vec_add (sa->last_sa_init_res_packet_data, ike, len);
650 while (p < len && payload != IKEV2_PAYLOAD_NONE)
652 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
653 u32 plen = clib_net_to_host_u16 (ikep->length);
655 if (plen < sizeof (ike_payload_header_t))
658 if (payload == IKEV2_PAYLOAD_SA)
660 ikev2_sa_free_proposal_vector (&sa->r_proposals);
661 sa->r_proposals = ikev2_parse_sa_payload (ikep);
664 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
666 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
669 else if (payload == IKEV2_PAYLOAD_KE)
671 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
672 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
673 vec_free (sa->r_dh_data);
674 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
676 else if (payload == IKEV2_PAYLOAD_NONCE)
678 vec_free (sa->r_nonce);
679 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
681 else if (payload == IKEV2_PAYLOAD_NOTIFY)
683 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
686 else if (payload == IKEV2_PAYLOAD_VENDOR)
688 ikev2_parse_vendor_payload (ikep);
692 clib_warning ("unknown payload %u flags %x length %u", payload,
694 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
696 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
697 sa->unsupported_cp = payload;
702 payload = ikep->nextpayload;
708 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
713 u32 len = clib_net_to_host_u32 (ike->length);
714 ike_payload_header_t *ikep = 0;
716 ikev2_sa_transform_t *tr_integ;
718 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
721 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
723 ikep = (ike_payload_header_t *) & ike->payload[p];
724 plen = clib_net_to_host_u16 (ikep->length);
726 if (plen < sizeof (*ikep))
729 if (*payload == IKEV2_PAYLOAD_SK)
731 clib_warning ("received IKEv2 payload SK, len %u", plen - 4);
732 last_payload = *payload;
736 clib_warning ("unknown payload %u flags %x length %u", payload,
738 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
740 sa->unsupported_cp = *payload;
745 *payload = ikep->nextpayload;
749 if (last_payload != IKEV2_PAYLOAD_SK)
751 clib_warning ("Last payload must be SK");
756 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
757 (u8 *) ike, len - tr_integ->key_trunc);
759 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
761 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
763 clib_warning ("message integrity check failed");
769 return ikev2_decrypt_data (sa, ikep->payload, plen);
773 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
775 ikev2_main_t *km = &ikev2_main;
779 u32 thread_index = vlib_get_thread_index ();
781 if (!sa->initial_contact)
784 /* find old IKE SAs with the same authenticated identity */
786 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
787 if (tmp->i_id.type != sa->i_id.type ||
788 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
789 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
792 if (sa->rspi != tmp->rspi)
793 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
797 for (i = 0; i < vec_len (delete); i++)
800 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
802 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
804 ikev2_delete_sa (tmp);
808 sa->initial_contact = 0;
812 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
814 ikev2_child_sa_t *first_child_sa;
816 u32 len = clib_net_to_host_u32 (ike->length);
817 u8 payload = ike->nextpayload;
820 ike_payload_header_t *ikep;
823 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
824 "exchange %x flags %x msgid %x length %u",
825 clib_net_to_host_u64 (ike->ispi),
826 clib_net_to_host_u64 (ike->rspi),
827 payload, ike->version,
828 ike->exchange, ike->flags,
829 clib_net_to_host_u32 (ike->msgid), len);
831 ikev2_calc_keys (sa);
833 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
837 if (sa->unsupported_cp)
838 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
839 goto cleanup_and_exit;
842 /* select or create 1st child SA */
843 if (sa->is_initiator)
845 first_child_sa = &sa->childs[0];
849 ikev2_sa_free_all_child_sa (&sa->childs);
850 vec_add2 (sa->childs, first_child_sa, 1);
854 /* process encrypted payload */
856 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
858 ikep = (ike_payload_header_t *) & plaintext[p];
859 plen = clib_net_to_host_u16 (ikep->length);
861 if (plen < sizeof (ike_payload_header_t))
862 goto cleanup_and_exit;
864 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
866 clib_warning ("received payload SA, len %u", plen - sizeof (*ikep));
867 if (sa->is_initiator)
869 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
870 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
874 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
875 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
878 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
880 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
882 sa->i_id.type = id->id_type;
883 vec_free (sa->i_id.data);
884 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
886 clib_warning ("received payload IDi, len %u id_type %u",
887 plen - sizeof (*id), id->id_type);
889 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
891 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
893 sa->r_id.type = id->id_type;
894 vec_free (sa->r_id.data);
895 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
897 clib_warning ("received payload IDr len %u id_type %u",
898 plen - sizeof (*id), id->id_type);
900 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
902 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
904 if (sa->is_initiator)
906 sa->r_auth.method = a->auth_method;
907 vec_free (sa->r_auth.data);
908 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
912 sa->i_auth.method = a->auth_method;
913 vec_free (sa->i_auth.data);
914 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
917 clib_warning ("received payload AUTH, len %u auth_type %u",
918 plen - sizeof (*a), a->auth_method);
920 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
922 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
923 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
925 sa->initial_contact = 1;
929 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
931 ikev2_parse_vendor_payload (ikep);
933 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
935 clib_warning ("received payload TSi, len %u",
936 plen - sizeof (*ikep));
938 vec_free (first_child_sa->tsi);
939 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
941 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
943 clib_warning ("received payload TSr, len %u",
944 plen - sizeof (*ikep));
946 vec_free (first_child_sa->tsr);
947 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
951 clib_warning ("unknown payload %u flags %x length %u data %u",
952 payload, ikep->flags, plen - 4,
953 format_hex_bytes, ikep->payload, plen - 4);
955 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
957 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
958 sa->unsupported_cp = payload;
963 payload = ikep->nextpayload;
968 vec_free (plaintext);
972 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
976 u32 len = clib_net_to_host_u32 (ike->length);
977 u8 payload = ike->nextpayload;
980 ike_payload_header_t *ikep;
983 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
984 "exchange %x flags %x msgid %x length %u",
985 clib_net_to_host_u64 (ike->ispi),
986 clib_net_to_host_u64 (ike->rspi),
987 payload, ike->version,
988 ike->exchange, ike->flags,
989 clib_net_to_host_u32 (ike->msgid), len);
991 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
994 goto cleanup_and_exit;
996 /* process encrypted payload */
998 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1000 ikep = (ike_payload_header_t *) & plaintext[p];
1001 plen = clib_net_to_host_u16 (ikep->length);
1003 if (plen < sizeof (ike_payload_header_t))
1004 goto cleanup_and_exit;
1006 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1008 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1009 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1010 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1013 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1015 sa->del = ikev2_parse_delete_payload (ikep);
1017 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1019 ikev2_parse_vendor_payload (ikep);
1023 clib_warning ("unknown payload %u flags %x length %u data %u",
1024 payload, ikep->flags, plen - 4,
1025 format_hex_bytes, ikep->payload, plen - 4);
1027 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1029 sa->unsupported_cp = payload;
1034 payload = ikep->nextpayload;
1039 vec_free (plaintext);
1043 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1047 u32 len = clib_net_to_host_u32 (ike->length);
1048 u8 payload = ike->nextpayload;
1051 u8 nonce[IKEV2_NONCE_SIZE];
1053 ike_payload_header_t *ikep;
1055 ikev2_notify_t *n = 0;
1056 ikev2_ts_t *tsi = 0;
1057 ikev2_ts_t *tsr = 0;
1058 ikev2_sa_proposal_t *proposal = 0;
1059 ikev2_child_sa_t *child_sa;
1061 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
1062 "exchange %x flags %x msgid %x length %u",
1063 clib_net_to_host_u64 (ike->ispi),
1064 clib_net_to_host_u64 (ike->rspi),
1065 payload, ike->version,
1066 ike->exchange, ike->flags,
1067 clib_net_to_host_u32 (ike->msgid), len);
1069 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1072 goto cleanup_and_exit;
1074 /* process encrypted payload */
1076 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1078 ikep = (ike_payload_header_t *) & plaintext[p];
1079 plen = clib_net_to_host_u16 (ikep->length);
1081 if (plen < sizeof (ike_payload_header_t))
1082 goto cleanup_and_exit;
1084 else if (payload == IKEV2_PAYLOAD_SA)
1086 proposal = ikev2_parse_sa_payload (ikep);
1088 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1090 n = ikev2_parse_notify_payload (ikep);
1091 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1096 else if (payload == IKEV2_PAYLOAD_DELETE)
1098 sa->del = ikev2_parse_delete_payload (ikep);
1100 else if (payload == IKEV2_PAYLOAD_VENDOR)
1102 ikev2_parse_vendor_payload (ikep);
1104 else if (payload == IKEV2_PAYLOAD_NONCE)
1106 clib_memcpy (nonce, ikep->payload, plen - sizeof (*ikep));
1108 else if (payload == IKEV2_PAYLOAD_TSI)
1110 tsi = ikev2_parse_ts_payload (ikep);
1112 else if (payload == IKEV2_PAYLOAD_TSR)
1114 tsr = ikev2_parse_ts_payload (ikep);
1118 clib_warning ("unknown payload %u flags %x length %u data %u",
1119 payload, ikep->flags, plen - 4,
1120 format_hex_bytes, ikep->payload, plen - 4);
1122 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1124 sa->unsupported_cp = payload;
1129 payload = ikep->nextpayload;
1133 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1135 ikev2_rekey_t *rekey = &sa->rekey[0];
1136 rekey->protocol_id = proposal->protocol_id;
1138 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1139 rekey->i_proposal->spi = rekey->spi;
1140 rekey->r_proposal = proposal;
1144 vec_free (sa->r_nonce);
1145 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1146 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1149 child_sa->rekey_retries = 0;
1154 ikev2_rekey_t *rekey;
1155 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1158 clib_warning ("child SA spi %lx not found", n->spi);
1159 goto cleanup_and_exit;
1161 vec_add2 (sa->rekey, rekey, 1);
1162 rekey->protocol_id = n->protocol_id;
1163 rekey->spi = n->spi;
1164 rekey->i_proposal = proposal;
1166 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1170 vec_free (sa->i_nonce);
1171 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1172 /* generate new Nr */
1173 vec_free (sa->r_nonce);
1174 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1175 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1179 vec_free (plaintext);
1184 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1192 ikev2_sa_transform_t *tr_prf;
1195 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1201 nonce = sa->i_nonce;
1202 packet_data = sa->last_sa_init_res_packet_data;
1208 nonce = sa->r_nonce;
1209 packet_data = sa->last_sa_init_req_packet_data;
1212 data = vec_new (u8, 4);
1214 vec_append (data, id->data);
1216 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1217 vec_append (authmsg, packet_data);
1218 vec_append (authmsg, nonce);
1219 vec_append (authmsg, id_hash);
1227 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1229 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1230 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1231 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1232 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1239 ikev2_sa_match_ts (ikev2_sa_t * sa)
1241 ikev2_main_t *km = &ikev2_main;
1243 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1247 pool_foreach (p, km->profiles, ({
1249 if (sa->is_initiator)
1263 if (p->rem_id.type != id->type ||
1264 vec_len(p->rem_id.data) != vec_len(id->data) ||
1265 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1268 vec_foreach(ts, sa->childs[0].tsi)
1270 if (ikev2_ts_cmp(p_tsi, ts))
1277 vec_foreach(ts, sa->childs[0].tsr)
1279 if (ikev2_ts_cmp(p_tsr, ts))
1292 vec_free (sa->childs[0].tsi);
1293 vec_free (sa->childs[0].tsr);
1294 sa->childs[0].tsi = tsi;
1295 sa->childs[0].tsr = tsr;
1301 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1306 ikev2_sa_auth (ikev2_sa_t * sa)
1308 ikev2_main_t *km = &ikev2_main;
1309 ikev2_profile_t *p, *sel_p = 0;
1310 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1311 ikev2_sa_transform_t *tr_prf;
1314 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1316 /* only shared key and rsa signature */
1317 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1318 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1320 clib_warning ("unsupported authentication method %u",
1322 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1326 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1327 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1330 ikev2_auth_t *sa_auth;
1332 if (sa->is_initiator)
1335 sa_auth = &sa->r_auth;
1340 sa_auth = &sa->i_auth;
1344 pool_foreach (p, km->profiles, ({
1347 if (p->rem_id.type != sa_id->type ||
1348 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1349 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1352 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1354 if (!p->auth.data ||
1355 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1358 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1359 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1361 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1363 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1370 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1372 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1375 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1377 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1390 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1392 if (!sa->is_initiator)
1394 vec_free (sa->r_id.data);
1395 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1396 sa->r_id.type = sel_p->loc_id.type;
1398 /* generate our auth data */
1399 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1400 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1402 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1403 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1405 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1407 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1408 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1412 /* select transforms for 1st child sa */
1413 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1414 sa->childs[0].r_proposals =
1415 ikev2_select_proposal (sa->childs[0].i_proposals,
1416 IKEV2_PROTOCOL_ESP);
1421 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1429 ikev2_sa_auth_init (ikev2_sa_t * sa)
1431 ikev2_main_t *km = &ikev2_main;
1432 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1433 ikev2_sa_transform_t *tr_prf;
1436 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1438 /* only shared key and rsa signature */
1439 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1440 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1442 clib_warning ("unsupported authentication method %u",
1444 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1448 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1449 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1450 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1451 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1454 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1456 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1457 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1459 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1461 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1462 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1473 ikev2_create_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1474 ikev2_child_sa_t * child)
1476 ipsec_add_del_tunnel_args_t a;
1477 ikev2_sa_transform_t *tr;
1478 ikev2_sa_proposal_t *proposals;
1481 if (!child->r_proposals)
1483 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1487 memset (&a, 0, sizeof (a));
1489 if (sa->is_initiator)
1491 a.local_ip.as_u32 = sa->iaddr.as_u32;
1492 a.remote_ip.as_u32 = sa->raddr.as_u32;
1493 proposals = child->i_proposals;
1494 a.local_spi = child->r_proposals[0].spi;
1495 a.remote_spi = child->i_proposals[0].spi;
1499 a.local_ip.as_u32 = sa->raddr.as_u32;
1500 a.remote_ip.as_u32 = sa->iaddr.as_u32;
1501 proposals = child->r_proposals;
1502 a.local_spi = child->i_proposals[0].spi;
1503 a.remote_spi = child->r_proposals[0].spi;
1507 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1509 a.esn = tr->esn_type;
1513 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1516 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1518 switch (tr->key_len)
1521 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1524 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1527 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1530 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1537 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1543 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1547 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1550 if (tr->integ_type != IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96)
1552 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1558 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1562 ikev2_calc_child_keys (sa, child);
1564 u8 *loc_ckey, *rem_ckey, *loc_ikey, *rem_ikey;
1565 if (sa->is_initiator)
1567 loc_ikey = child->sk_ai;
1568 rem_ikey = child->sk_ar;
1569 loc_ckey = child->sk_ei;
1570 rem_ckey = child->sk_er;
1574 loc_ikey = child->sk_ar;
1575 rem_ikey = child->sk_ai;
1576 loc_ckey = child->sk_er;
1577 rem_ckey = child->sk_ei;
1580 a.integ_alg = IPSEC_INTEG_ALG_SHA1_96;
1581 a.local_integ_key_len = vec_len (loc_ikey);
1582 clib_memcpy (a.local_integ_key, loc_ikey, a.local_integ_key_len);
1583 a.remote_integ_key_len = vec_len (rem_ikey);
1584 clib_memcpy (a.remote_integ_key, rem_ikey, a.remote_integ_key_len);
1586 a.crypto_alg = encr_type;
1587 a.local_crypto_key_len = vec_len (loc_ckey);
1588 clib_memcpy (a.local_crypto_key, loc_ckey, a.local_crypto_key_len);
1589 a.remote_crypto_key_len = vec_len (rem_ckey);
1590 clib_memcpy (a.remote_crypto_key, rem_ckey, a.remote_crypto_key_len);
1592 if (sa->profile && sa->profile->lifetime)
1594 child->time_to_expiration = vlib_time_now (vnm->vlib_main)
1595 + sa->profile->lifetime;
1596 if (sa->profile->lifetime_jitter)
1598 child->time_to_expiration +=
1599 1 + (rand () % sa->profile->lifetime_jitter);
1603 ipsec_add_del_tunnel_if (&a);
1609 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1610 ikev2_child_sa_t * child)
1612 ipsec_add_del_tunnel_args_t a;
1614 if (sa->is_initiator)
1616 if (!vec_len (child->i_proposals))
1620 a.local_ip.as_u32 = sa->iaddr.as_u32;
1621 a.remote_ip.as_u32 = sa->raddr.as_u32;
1622 a.local_spi = child->r_proposals[0].spi;
1623 a.remote_spi = child->i_proposals[0].spi;
1627 if (!vec_len (child->r_proposals))
1631 a.local_ip.as_u32 = sa->raddr.as_u32;
1632 a.remote_ip.as_u32 = sa->iaddr.as_u32;
1633 a.local_spi = child->i_proposals[0].spi;
1634 a.remote_spi = child->r_proposals[0].spi;
1637 ipsec_add_del_tunnel_if (&a);
1642 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1645 ike_payload_header_t *ph;
1649 ikev2_sa_transform_t *tr_encr, *tr_integ;
1651 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1653 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1655 ikev2_payload_chain_t *chain = 0;
1656 ikev2_payload_new_chain (chain);
1658 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1660 if (sa->r_proposals == 0)
1662 ikev2_payload_add_notify (chain,
1663 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1664 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1666 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1668 u8 *data = vec_new (u8, 2);
1669 ikev2_sa_transform_t *tr_dh;
1671 ikev2_sa_get_td_for_type (sa->r_proposals,
1672 IKEV2_TRANSFORM_TYPE_DH);
1673 ASSERT (tr_dh && tr_dh->dh_type);
1675 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1676 data[1] = (tr_dh->dh_type) & 0xff;
1678 ikev2_payload_add_notify (chain,
1679 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1682 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1684 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1686 u8 *data = vec_new (u8, 1);
1688 data[0] = sa->unsupported_cp;
1689 ikev2_payload_add_notify (chain,
1690 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1696 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1697 ikev2_payload_add_sa (chain, sa->r_proposals);
1698 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1699 ikev2_payload_add_nonce (chain, sa->r_nonce);
1702 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1704 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1706 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1707 ikev2_payload_add_auth (chain, &sa->r_auth);
1708 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1709 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1710 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1712 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1714 ikev2_payload_add_notify (chain,
1715 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1717 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1719 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1721 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1723 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1724 ikev2_payload_add_auth (chain, &sa->r_auth);
1726 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1728 ikev2_payload_add_notify (chain,
1729 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1730 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1731 ikev2_payload_add_auth (chain, &sa->r_auth);
1732 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1733 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1735 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1737 u8 *data = vec_new (u8, 1);
1739 data[0] = sa->unsupported_cp;
1740 ikev2_payload_add_notify (chain,
1741 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1745 else if (sa->state == IKEV2_STATE_SA_INIT)
1747 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1748 ikev2_payload_add_auth (chain, &sa->i_auth);
1749 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1750 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1751 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1755 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1759 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1761 /* if pending delete */
1764 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1766 if (sa->is_initiator)
1767 ikev2_payload_add_delete (chain, sa->del);
1769 /* The response to a request that deletes the IKE SA is an empty
1770 INFORMATIONAL response. */
1771 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1773 /* The response to a request that deletes ESP or AH SAs will contain
1774 delete payloads for the paired SAs going in the other direction. */
1777 ikev2_payload_add_delete (chain, sa->del);
1782 /* received N(AUTHENTICATION_FAILED) */
1783 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1785 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1788 /* received unsupported critical payload */
1789 else if (sa->unsupported_cp)
1791 u8 *data = vec_new (u8, 1);
1793 data[0] = sa->unsupported_cp;
1794 ikev2_payload_add_notify (chain,
1795 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1798 sa->unsupported_cp = 0;
1800 /* else send empty response */
1802 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1804 if (sa->is_initiator)
1807 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
1808 ikev2_notify_t notify;
1809 u8 *data = vec_new (u8, 4);
1810 memset (¬ify, 0, sizeof (notify));
1811 notify.protocol_id = IKEV2_PROTOCOL_ESP;
1812 notify.spi = sa->childs[0].i_proposals->spi;
1813 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
1815 ikev2_payload_add_sa (chain, proposals);
1816 ikev2_payload_add_nonce (chain, sa->i_nonce);
1817 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1818 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1819 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
1828 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
1829 ikev2_payload_add_nonce (chain, sa->r_nonce);
1830 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
1832 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
1834 vec_del1 (sa->rekey, 0);
1836 else if (sa->unsupported_cp)
1838 u8 *data = vec_new (u8, 1);
1840 data[0] = sa->unsupported_cp;
1841 ikev2_payload_add_notify (chain,
1842 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1845 sa->unsupported_cp = 0;
1849 ikev2_payload_add_notify (chain,
1850 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
1857 ike->version = IKE_VERSION_2;
1858 ike->nextpayload = IKEV2_PAYLOAD_SK;
1859 tlen = sizeof (*ike);
1860 if (sa->is_initiator)
1862 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
1863 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
1867 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
1871 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1873 tlen += vec_len (chain->data);
1874 ike->nextpayload = chain->first_payload_type;
1875 ike->length = clib_host_to_net_u32 (tlen);
1876 clib_memcpy (ike->payload, chain->data, vec_len (chain->data));
1878 /* store whole IKE payload - needed for PSK auth */
1879 vec_free (sa->last_sa_init_res_packet_data);
1880 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
1885 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
1888 plen = sizeof (*ph);
1889 ph = (ike_payload_header_t *) & ike->payload[0];
1890 ph->nextpayload = chain->first_payload_type;
1892 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
1895 /* add space for hmac */
1896 plen += tr_integ->key_trunc;
1899 /* payload and total length */
1900 ph->length = clib_host_to_net_u16 (plen);
1901 ike->length = clib_host_to_net_u32 (tlen);
1903 /* calc integrity data for whole packet except hash itself */
1905 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
1906 (u8 *) ike, tlen - tr_integ->key_trunc);
1908 clib_memcpy (ike->payload + tlen - tr_integ->key_trunc - sizeof (*ike),
1909 integ, tr_integ->key_trunc);
1911 /* store whole IKE payload - needed for retransmit */
1912 vec_free (sa->last_res_packet_data);
1913 vec_add (sa->last_res_packet_data, ike, tlen);
1917 ikev2_payload_destroy_chain (chain);
1923 ikev2_retransmit_sa_init (ike_header_t * ike,
1924 ip4_address_t iaddr, ip4_address_t raddr)
1926 ikev2_main_t *km = &ikev2_main;
1928 u32 thread_index = vlib_get_thread_index ();
1931 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
1932 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
1933 sa->iaddr.as_u32 == iaddr.as_u32 &&
1934 sa->raddr.as_u32 == raddr.as_u32)
1937 u32 len = clib_net_to_host_u32(ike->length);
1938 u8 payload = ike->nextpayload;
1940 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
1941 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
1942 u32 plen = clib_net_to_host_u16(ikep->length);
1944 if (plen < sizeof(ike_payload_header_t))
1947 if (payload == IKEV2_PAYLOAD_NONCE)
1949 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
1951 /* req is retransmit */
1952 if (sa->state == IKEV2_STATE_SA_INIT)
1955 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
1956 ike->ispi = tmp->ispi;
1957 ike->rspi = tmp->rspi;
1958 ike->nextpayload = tmp->nextpayload;
1959 ike->version = tmp->version;
1960 ike->exchange = tmp->exchange;
1961 ike->flags = tmp->flags;
1962 ike->msgid = tmp->msgid;
1963 ike->length = tmp->length;
1964 clib_memcpy(ike->payload, tmp->payload,
1965 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
1966 clib_warning("IKE_SA_INIT retransmit from %U to %U",
1967 format_ip4_address, &raddr,
1968 format_ip4_address, &iaddr);
1971 /* else ignore req */
1974 clib_warning("IKE_SA_INIT ignore from %U to %U",
1975 format_ip4_address, &raddr,
1976 format_ip4_address, &iaddr);
1981 payload = ikep->nextpayload;
1988 /* req is not retransmit */
1993 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
1995 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
1998 if (msg_id > sa->last_msg_id)
2000 sa->last_msg_id = msg_id;
2003 /* retransmitted req */
2004 else if (msg_id == sa->last_msg_id)
2007 tmp = (ike_header_t *) sa->last_res_packet_data;
2008 ike->ispi = tmp->ispi;
2009 ike->rspi = tmp->rspi;
2010 ike->nextpayload = tmp->nextpayload;
2011 ike->version = tmp->version;
2012 ike->exchange = tmp->exchange;
2013 ike->flags = tmp->flags;
2014 ike->msgid = tmp->msgid;
2015 ike->length = tmp->length;
2016 clib_memcpy (ike->payload, tmp->payload,
2017 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2018 clib_warning ("IKE msgid %u retransmit from %U to %U",
2020 format_ip4_address, &sa->raddr,
2021 format_ip4_address, &sa->iaddr);
2024 /* old req ignore */
2027 clib_warning ("IKE msgid %u req ignore from %U to %U",
2029 format_ip4_address, &sa->raddr,
2030 format_ip4_address, &sa->iaddr);
2036 ikev2_node_fn (vlib_main_t * vm,
2037 vlib_node_runtime_t * node, vlib_frame_t * frame)
2039 u32 n_left_from, *from, *to_next;
2040 ikev2_next_t next_index;
2041 ikev2_main_t *km = &ikev2_main;
2042 u32 thread_index = vlib_get_thread_index ();
2044 from = vlib_frame_vector_args (frame);
2045 n_left_from = frame->n_vectors;
2046 next_index = node->cached_next_index;
2048 while (n_left_from > 0)
2052 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2054 while (n_left_from > 0 && n_left_to_next > 0)
2058 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2063 ikev2_sa_t *sa0 = 0;
2064 ikev2_sa_t sa; /* temporary store for SA */
2068 /* speculatively enqueue b0 to the current next frame */
2074 n_left_to_next -= 1;
2076 b0 = vlib_get_buffer (vm, bi0);
2077 ike0 = vlib_buffer_get_current (b0);
2078 vlib_buffer_advance (b0, -sizeof (*udp0));
2079 udp0 = vlib_buffer_get_current (b0);
2080 vlib_buffer_advance (b0, -sizeof (*ip40));
2081 ip40 = vlib_buffer_get_current (b0);
2083 if (ike0->version != IKE_VERSION_2)
2085 vlib_node_increment_counter (vm, ikev2_node.index,
2086 IKEV2_ERROR_NOT_IKEV2, 1);
2090 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2093 memset (sa0, 0, sizeof (*sa0));
2095 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2097 if (ike0->rspi == 0)
2099 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2100 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2102 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2106 vlib_node_increment_counter (vm, ikev2_node.index,
2107 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2109 len = clib_net_to_host_u32 (ike0->length);
2114 vlib_node_increment_counter (vm, ikev2_node.index,
2115 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2120 ikev2_process_sa_init_req (vm, sa0, ike0);
2122 if (sa0->state == IKEV2_STATE_SA_INIT)
2124 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2126 ikev2_select_proposal (sa0->i_proposals,
2127 IKEV2_PROTOCOL_IKE);
2128 ikev2_generate_sa_init_data (sa0);
2131 if (sa0->state == IKEV2_STATE_SA_INIT
2132 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2134 len = ikev2_generate_message (sa0, ike0, 0);
2137 if (sa0->state == IKEV2_STATE_SA_INIT)
2139 /* add SA to the pool */
2140 pool_get (km->per_thread_data[thread_index].sas,
2142 clib_memcpy (sa0, &sa, sizeof (*sa0));
2144 per_thread_data[thread_index].sa_by_rspi,
2147 km->per_thread_data[thread_index].sas);
2151 ikev2_sa_free_all_vec (sa0);
2157 ikev2_process_sa_init_resp (vm, sa0, ike0);
2159 if (sa0->state == IKEV2_STATE_SA_INIT)
2161 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2162 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2166 pool_elt_at_index (km->sais, p[0]);
2168 ikev2_complete_sa_data (sa0, sai);
2169 ikev2_calc_keys (sa0);
2170 ikev2_sa_auth_init (sa0);
2171 len = ikev2_generate_message (sa0, ike0, 0);
2175 if (sa0->state == IKEV2_STATE_SA_INIT)
2177 /* add SA to the pool */
2178 pool_get (km->per_thread_data[thread_index].sas, sa0);
2179 clib_memcpy (sa0, &sa, sizeof (*sa0));
2180 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2182 sa0 - km->per_thread_data[thread_index].sas);
2186 ikev2_sa_free_all_vec (sa0);
2190 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2193 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2194 clib_net_to_host_u64 (ike0->rspi));
2198 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2201 r = ikev2_retransmit_resp (sa0, ike0);
2204 vlib_node_increment_counter (vm, ikev2_node.index,
2205 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2207 len = clib_net_to_host_u32 (ike0->length);
2212 vlib_node_increment_counter (vm, ikev2_node.index,
2213 IKEV2_ERROR_IKE_REQ_IGNORE,
2218 ikev2_process_auth_req (vm, sa0, ike0);
2219 ikev2_sa_auth (sa0);
2220 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2222 ikev2_initial_contact_cleanup (sa0);
2223 ikev2_sa_match_ts (sa0);
2224 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2225 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2229 if (sa0->is_initiator)
2231 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2235 pool_elt_at_index (km->sais, p[0]);
2236 hash_unset (km->sa_by_ispi, sai->ispi);
2237 ikev2_sa_free_all_vec (sai);
2238 pool_put (km->sais, sai);
2243 len = ikev2_generate_message (sa0, ike0, 0);
2247 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2250 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2251 clib_net_to_host_u64 (ike0->rspi));
2255 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2258 r = ikev2_retransmit_resp (sa0, ike0);
2261 vlib_node_increment_counter (vm, ikev2_node.index,
2262 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2264 len = clib_net_to_host_u32 (ike0->length);
2269 vlib_node_increment_counter (vm, ikev2_node.index,
2270 IKEV2_ERROR_IKE_REQ_IGNORE,
2275 ikev2_process_informational_req (vm, sa0, ike0);
2278 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2280 ikev2_delete_t *d, *tmp, *resp = 0;
2281 vec_foreach (d, sa0->del)
2283 ikev2_child_sa_t *ch_sa;
2284 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2286 !sa0->is_initiator);
2289 ikev2_delete_tunnel_interface (km->vnet_main,
2291 if (!sa0->is_initiator)
2293 vec_add2 (resp, tmp, 1);
2294 tmp->protocol_id = d->protocol_id;
2295 tmp->spi = ch_sa->r_proposals[0].spi;
2297 ikev2_sa_del_child_sa (sa0, ch_sa);
2300 if (!sa0->is_initiator)
2302 vec_free (sa0->del);
2307 if (!sa0->is_initiator)
2309 len = ikev2_generate_message (sa0, ike0, 0);
2313 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2316 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2317 clib_net_to_host_u64 (ike0->rspi));
2321 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2324 r = ikev2_retransmit_resp (sa0, ike0);
2327 vlib_node_increment_counter (vm, ikev2_node.index,
2328 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2330 len = clib_net_to_host_u32 (ike0->length);
2335 vlib_node_increment_counter (vm, ikev2_node.index,
2336 IKEV2_ERROR_IKE_REQ_IGNORE,
2341 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2344 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2346 ikev2_child_sa_t *child;
2347 vec_add2 (sa0->childs, child, 1);
2348 child->r_proposals = sa0->rekey[0].r_proposal;
2349 child->i_proposals = sa0->rekey[0].i_proposal;
2350 child->tsi = sa0->rekey[0].tsi;
2351 child->tsr = sa0->rekey[0].tsr;
2352 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2355 if (sa0->is_initiator)
2357 vec_del1 (sa0->rekey, 0);
2361 len = ikev2_generate_message (sa0, ike0, 0);
2368 clib_warning ("IKEv2 exchange %u packet received from %U to %U",
2370 format_ip4_address, ip40->src_address.as_u8,
2371 format_ip4_address, ip40->dst_address.as_u8);
2375 /* if we are sending packet back, rewrite headers */
2378 next0 = IKEV2_NEXT_IP4_LOOKUP;
2379 if (sa0->is_initiator)
2381 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2382 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2386 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2387 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2390 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2392 b0->current_length =
2393 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2394 ip40->length = clib_host_to_net_u16 (b0->current_length);
2395 ip40->checksum = ip4_header_checksum (ip40);
2398 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2399 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2401 ikev2_child_sa_t *c;
2403 vec_foreach (c, sa0->childs)
2404 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2406 ikev2_delete_sa (sa0);
2408 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2410 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2411 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2413 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2414 t->sw_if_index = sw_if_index0;
2415 t->next_index = next0;
2418 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2419 n_left_to_next, bi0, next0);
2422 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2425 vlib_node_increment_counter (vm, ikev2_node.index,
2426 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2427 return frame->n_vectors;
2431 VLIB_REGISTER_NODE (ikev2_node,static) = {
2432 .function = ikev2_node_fn,
2434 .vector_size = sizeof (u32),
2435 .format_trace = format_ikev2_trace,
2436 .type = VLIB_NODE_TYPE_INTERNAL,
2438 .n_errors = ARRAY_LEN(ikev2_error_strings),
2439 .error_strings = ikev2_error_strings,
2441 .n_next_nodes = IKEV2_N_NEXT,
2444 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2445 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2451 static clib_error_t *
2452 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2453 ikev2_transforms_set * ts,
2454 ikev2_sa_proposal_t ** proposals, int is_ike)
2457 ikev2_main_t *km = &ikev2_main;
2458 ikev2_sa_proposal_t *proposal;
2459 vec_add2 (*proposals, proposal, 1);
2460 ikev2_sa_transform_t *td;
2465 vec_foreach (td, km->supported_transforms)
2467 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2468 && td->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC
2469 && td->key_len == ts->crypto_key_size / 8)
2472 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2473 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2474 vec_add (td->attrs, (u8 *) attr, 4);
2475 vec_add1 (proposal->transforms, *td);
2484 r = clib_error_return (0, "Unsupported algorithm");
2490 vec_foreach (td, km->supported_transforms)
2492 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2493 && td->integ_type == IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96)
2495 vec_add1 (proposal->transforms, *td);
2502 r = clib_error_return (0, "Unsupported algorithm");
2510 vec_foreach (td, km->supported_transforms)
2512 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2513 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA1)
2515 vec_add1 (proposal->transforms, *td);
2522 r = clib_error_return (0, "Unsupported algorithm");
2529 vec_foreach (td, km->supported_transforms)
2531 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2533 vec_add1 (proposal->transforms, *td);
2536 sa->dh_group = td->dh_type;
2544 r = clib_error_return (0, "Unsupported algorithm");
2551 vec_foreach (td, km->supported_transforms)
2553 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2555 vec_add1 (proposal->transforms, *td);
2562 r = clib_error_return (0, "Unsupported algorithm");
2571 static ikev2_profile_t *
2572 ikev2_profile_index_by_name (u8 * name)
2574 ikev2_main_t *km = &ikev2_main;
2577 p = mhash_get (&km->profile_index_by_name, name);
2581 return pool_elt_at_index (km->profiles, p[0]);
2586 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2595 b0 = vlib_get_buffer (vm, bi0);
2596 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2597 udp0 = vlib_buffer_get_current (b0);
2598 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2599 ip40 = vlib_buffer_get_current (b0);
2602 ip40->ip_version_and_header_length = 0x45;
2604 ip40->fragment_id = 0;
2605 ip40->flags_and_fragment_offset = 0;
2607 ip40->protocol = IP_PROTOCOL_UDP;
2608 ip40->dst_address.as_u32 = dst->as_u32;
2609 ip40->src_address.as_u32 = src->as_u32;
2610 udp0->dst_port = clib_host_to_net_u16 (500);
2611 udp0->src_port = clib_host_to_net_u16 (500);
2612 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2614 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2615 ip40->length = clib_host_to_net_u16 (b0->current_length);
2616 ip40->checksum = ip4_header_checksum (ip40);
2619 /* send the request */
2620 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2621 to_next = vlib_frame_vector_args (f);
2624 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2629 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2632 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2637 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2638 *ike = vlib_buffer_get_current (b0);
2643 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2645 ikev2_main_t *km = &ikev2_main;
2647 km->pkey = ikev2_load_key_file (file);
2648 if (km->pkey == NULL)
2649 return clib_error_return (0, "load key '%s' failed", file);
2655 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2657 ikev2_main_t *km = &ikev2_main;
2662 if (ikev2_profile_index_by_name (name))
2663 return clib_error_return (0, "policy %v already exists", name);
2665 pool_get (km->profiles, p);
2666 memset (p, 0, sizeof (*p));
2667 p->name = vec_dup (name);
2668 p->responder.sw_if_index = ~0;
2669 uword index = p - km->profiles;
2670 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2674 p = ikev2_profile_index_by_name (name);
2676 return clib_error_return (0, "policy %v does not exists", name);
2679 pool_put (km->profiles, p);
2680 mhash_unset (&km->profile_index_by_name, name, 0);
2686 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2687 u8 * auth_data, u8 data_hex_format)
2692 p = ikev2_profile_index_by_name (name);
2696 r = clib_error_return (0, "unknown profile %v", name);
2699 vec_free (p->auth.data);
2700 p->auth.method = auth_method;
2701 p->auth.data = vec_dup (auth_data);
2702 p->auth.hex = data_hex_format;
2704 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2706 vec_add1 (p->auth.data, 0);
2708 EVP_PKEY_free (p->auth.key);
2709 p->auth.key = ikev2_load_cert_file (auth_data);
2710 if (p->auth.key == NULL)
2711 return clib_error_return (0, "load cert '%s' failed", auth_data);
2718 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2724 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2725 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2727 r = clib_error_return (0, "unsupported identity type %U",
2728 format_ikev2_id_type, id_type);
2732 p = ikev2_profile_index_by_name (name);
2736 r = clib_error_return (0, "unknown profile %v", name);
2742 vec_free (p->loc_id.data);
2743 p->loc_id.type = id_type;
2744 p->loc_id.data = vec_dup (data);
2748 vec_free (p->rem_id.data);
2749 p->rem_id.type = id_type;
2750 p->rem_id.data = vec_dup (data);
2757 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2758 u16 start_port, u16 end_port, ip4_address_t start_addr,
2759 ip4_address_t end_addr, int is_local)
2764 p = ikev2_profile_index_by_name (name);
2768 r = clib_error_return (0, "unknown profile %v", name);
2774 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2775 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2776 p->loc_ts.start_port = start_port;
2777 p->loc_ts.end_port = end_port;
2778 p->loc_ts.protocol_id = protocol_id;
2779 p->loc_ts.ts_type = 7;
2783 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2784 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2785 p->rem_ts.start_port = start_port;
2786 p->rem_ts.end_port = end_port;
2787 p->rem_ts.protocol_id = protocol_id;
2788 p->rem_ts.ts_type = 7;
2796 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
2797 u32 sw_if_index, ip4_address_t ip4)
2802 p = ikev2_profile_index_by_name (name);
2806 r = clib_error_return (0, "unknown profile %v", name);
2810 p->responder.sw_if_index = sw_if_index;
2811 p->responder.ip4 = ip4;
2817 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
2818 ikev2_transform_encr_type_t crypto_alg,
2819 ikev2_transform_integ_type_t integ_alg,
2820 ikev2_transform_dh_type_t dh_type,
2821 u32 crypto_key_size)
2826 p = ikev2_profile_index_by_name (name);
2830 r = clib_error_return (0, "unknown profile %v", name);
2834 p->ike_ts.crypto_alg = crypto_alg;
2835 p->ike_ts.integ_alg = integ_alg;
2836 p->ike_ts.dh_type = dh_type;
2837 p->ike_ts.crypto_key_size = crypto_key_size;
2842 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
2843 ikev2_transform_encr_type_t crypto_alg,
2844 ikev2_transform_integ_type_t integ_alg,
2845 ikev2_transform_dh_type_t dh_type,
2846 u32 crypto_key_size)
2851 p = ikev2_profile_index_by_name (name);
2855 r = clib_error_return (0, "unknown profile %v", name);
2859 p->esp_ts.crypto_alg = crypto_alg;
2860 p->esp_ts.integ_alg = integ_alg;
2861 p->esp_ts.dh_type = dh_type;
2862 p->esp_ts.crypto_key_size = crypto_key_size;
2867 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
2868 u64 lifetime, u32 jitter, u32 handover,
2874 p = ikev2_profile_index_by_name (name);
2878 r = clib_error_return (0, "unknown profile %v", name);
2882 p->lifetime = lifetime;
2883 p->lifetime_jitter = jitter;
2884 p->handover = handover;
2885 p->lifetime_maxdata = maxdata;
2890 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
2894 ip4_main_t *im = &ip4_main;
2895 ikev2_main_t *km = &ikev2_main;
2897 p = ikev2_profile_index_by_name (name);
2901 r = clib_error_return (0, "unknown profile %v", name);
2905 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
2907 r = clib_error_return (0, "responder not set for profile %v", name);
2912 /* Create the Initiator Request */
2916 ip_lookup_main_t *lm = &im->lookup_main;
2918 int len = sizeof (ike_header_t);
2920 /* Get own iface IP */
2922 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
2923 ip_interface_address_t *if_add =
2924 pool_elt_at_index (lm->if_address_pool, if_add_index0);
2925 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
2927 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
2929 /* Prepare the SA and the IKE payload */
2931 memset (&sa, 0, sizeof (ikev2_sa_t));
2932 ikev2_payload_chain_t *chain = 0;
2933 ikev2_payload_new_chain (chain);
2935 /* Build the IKE proposal payload */
2936 ikev2_sa_proposal_t *proposals = 0;
2937 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
2938 proposals[0].proposal_num = 1;
2939 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
2941 /* Add and then cleanup proposal data */
2942 ikev2_payload_add_sa (chain, proposals);
2943 ikev2_sa_free_proposal_vector (&proposals);
2945 sa.is_initiator = 1;
2947 sa.state = IKEV2_STATE_SA_INIT;
2948 ikev2_generate_sa_init_data (&sa);
2949 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
2950 ikev2_payload_add_nonce (chain, sa.i_nonce);
2952 /* Build the child SA proposal */
2953 vec_resize (sa.childs, 1);
2954 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
2955 &sa.childs[0].i_proposals, 0);
2956 sa.childs[0].i_proposals[0].proposal_num = 1;
2957 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
2958 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
2959 sizeof (sa.childs[0].i_proposals[0].spi));
2963 /* Add NAT detection notification messages (mandatory) */
2964 u8 nat_detection_source[8 + 8 + 4 + 2];
2965 u8 *nat_detection_sha1 = vec_new (u8, 20);
2967 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
2968 clib_memcpy (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
2969 tmpspi = clib_host_to_net_u64 (sa.rspi);
2970 clib_memcpy (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
2971 u16 tmpport = clib_host_to_net_u16 (500);
2972 clib_memcpy (&nat_detection_source[8 + 8 + 4], &tmpport,
2974 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
2975 clib_memcpy (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
2976 SHA1 (nat_detection_source, sizeof (nat_detection_source),
2977 nat_detection_sha1);
2978 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2979 nat_detection_sha1);
2980 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
2981 clib_memcpy (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
2982 SHA1 (nat_detection_source, sizeof (nat_detection_source),
2983 nat_detection_sha1);
2984 ikev2_payload_add_notify (chain,
2985 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2986 nat_detection_sha1);
2987 vec_free (nat_detection_sha1);
2989 u8 *sig_hash_algo = vec_new (u8, 8);
2990 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
2991 clib_memcpy (sig_hash_algo, &tmpsig, sizeof (tmpsig));
2992 ikev2_payload_add_notify (chain,
2993 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
2995 vec_free (sig_hash_algo);
2998 /* Buffer update and bolierplate */
2999 len += vec_len (chain->data);
3000 ike0->nextpayload = chain->first_payload_type;
3001 ike0->length = clib_host_to_net_u32 (len);
3002 clib_memcpy (ike0->payload, chain->data, vec_len (chain->data));
3003 ikev2_payload_destroy_chain (chain);
3005 ike0->version = IKE_VERSION_2;
3006 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3007 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3008 ike0->ispi = sa.ispi;
3010 /* store whole IKE payload - needed for PSK auth */
3011 vec_free (sa.last_sa_init_req_packet_data);
3012 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3014 /* add data to the SA then add it to the pool */
3015 sa.iaddr.as_u32 = if_ip->as_u32;
3016 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3017 sa.i_id.type = p->loc_id.type;
3018 sa.i_id.data = vec_dup (p->loc_id.data);
3019 sa.i_auth.method = p->auth.method;
3020 sa.i_auth.hex = p->auth.hex;
3021 sa.i_auth.data = vec_dup (p->auth.data);
3022 sa.i_auth.key = vec_dup (p->auth.key);
3023 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3024 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3026 /* add SA to the pool */
3027 ikev2_sa_t *sa0 = 0;
3028 pool_get (km->sais, sa0);
3029 clib_memcpy (sa0, &sa, sizeof (*sa0));
3030 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3032 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3040 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3041 ikev2_child_sa_t * csa)
3043 /* Create the Initiator notification for child SA removal */
3044 ikev2_main_t *km = &ikev2_main;
3049 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3052 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3053 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3054 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3055 vec_resize (sa->del, 1);
3056 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3057 sa->del->spi = csa->i_proposals->spi;
3058 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3059 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3060 len = ikev2_generate_message (sa, ike0, 0);
3062 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3064 /* delete local child SA */
3065 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3066 ikev2_sa_del_child_sa (sa, csa);
3070 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3073 ikev2_main_t *km = &ikev2_main;
3074 ikev2_main_per_thread_data_t *tkm;
3075 ikev2_sa_t *fsa = 0;
3076 ikev2_child_sa_t *fchild = 0;
3078 /* Search for the child SA */
3079 vec_foreach (tkm, km->per_thread_data)
3085 pool_foreach (sa, tkm->sas, ({
3086 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3096 if (!fchild || !fsa)
3098 r = clib_error_return (0, "Child SA not found");
3103 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3110 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3113 ikev2_main_t *km = &ikev2_main;
3114 ikev2_main_per_thread_data_t *tkm;
3115 ikev2_sa_t *fsa = 0;
3116 ikev2_main_per_thread_data_t *ftkm = 0;
3118 /* Search for the IKE SA */
3119 vec_foreach (tkm, km->per_thread_data)
3125 pool_foreach (sa, tkm->sas, ({
3126 if (sa->ispi == ispi)
3138 r = clib_error_return (0, "IKE SA not found");
3143 /* Create the Initiator notification for IKE SA removal */
3149 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3152 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3153 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3154 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3155 vec_resize (fsa->del, 1);
3156 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3157 fsa->del->spi = ispi;
3158 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3159 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3160 len = ikev2_generate_message (fsa, ike0, 0);
3162 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3166 /* delete local SA */
3167 ikev2_child_sa_t *c;
3168 vec_foreach (c, fsa->childs)
3170 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3171 ikev2_sa_del_child_sa (fsa, c);
3173 ikev2_sa_free_all_vec (fsa);
3174 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3177 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3178 pool_put (ftkm->sas, fsa);
3186 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3187 ikev2_child_sa_t * csa)
3189 /* Create the Initiator request for create child SA */
3195 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3198 ike0->version = IKE_VERSION_2;
3199 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3200 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3201 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3202 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3203 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3204 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3206 ikev2_rekey_t *rekey;
3207 vec_add2 (sa->rekey, rekey, 1);
3208 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3211 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3212 rekey->spi = proposals[0].spi;
3213 rekey->ispi = csa->i_proposals->spi;
3214 len = ikev2_generate_message (sa, ike0, proposals);
3215 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3216 vec_free (proposals);
3220 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3223 ikev2_main_t *km = &ikev2_main;
3224 ikev2_main_per_thread_data_t *tkm;
3225 ikev2_sa_t *fsa = 0;
3226 ikev2_child_sa_t *fchild = 0;
3228 /* Search for the child SA */
3229 vec_foreach (tkm, km->per_thread_data)
3235 pool_foreach (sa, tkm->sas, ({
3236 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3246 if (!fchild || !fsa)
3248 r = clib_error_return (0, "Child SA not found");
3253 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3260 ikev2_init (vlib_main_t * vm)
3262 ikev2_main_t *km = &ikev2_main;
3263 clib_error_t *error;
3264 vlib_thread_main_t *tm = vlib_get_thread_main ();
3267 memset (km, 0, sizeof (ikev2_main_t));
3268 km->vnet_main = vnet_get_main ();
3271 ikev2_crypto_init (km);
3273 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3275 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3276 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3278 km->per_thread_data[thread_id].sa_by_rspi =
3279 hash_create (0, sizeof (uword));
3282 km->sa_by_ispi = hash_create (0, sizeof (uword));
3285 if ((error = vlib_call_init_function (vm, ikev2_cli_init)))
3288 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3295 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3297 ikev2_main_t *km = &ikev2_main;
3298 vlib_main_t *vm = km->vlib_main;
3299 f64 now = vlib_time_now (vm);
3302 if (sa->is_initiator && sa->profile && csa->time_to_expiration
3303 && now > csa->time_to_expiration)
3305 if (!csa->is_expired || csa->rekey_retries > 0)
3307 ikev2_rekey_child_sa_internal (vm, sa, csa);
3308 csa->time_to_expiration = now + sa->profile->handover;
3309 csa->is_expired = 1;
3310 if (csa->rekey_retries == 0)
3312 csa->rekey_retries = 5;
3314 else if (csa->rekey_retries > 0)
3316 csa->rekey_retries--;
3317 clib_warning ("Rekeing Child SA 0x%x, retries left %d",
3318 csa->i_proposals->spi, csa->rekey_retries);
3319 if (csa->rekey_retries == 0)
3321 csa->rekey_retries = -1;
3328 csa->time_to_expiration = 0;
3329 ikev2_delete_child_sa_internal (vm, sa, csa);
3338 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3340 ikev2_main_t *km = &ikev2_main;
3341 vlib_main_t *vm = km->vlib_main;
3342 ikev2_main_per_thread_data_t *tkm;
3343 ikev2_sa_t *fsa = 0;
3344 ikev2_child_sa_t *fchild = 0;
3345 f64 now = vlib_time_now (vm);
3347 /* Search for the SA and child SA */
3348 vec_foreach (tkm, km->per_thread_data)
3354 pool_foreach (sa, tkm->sas, ({
3355 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3365 if (fchild && fsa && fsa->profile && fsa->profile->lifetime_maxdata)
3367 if (!fchild->is_expired
3368 && ipsec_sa->total_data_size > fsa->profile->lifetime_maxdata)
3370 fchild->time_to_expiration = now;
3375 static vlib_node_registration_t ikev2_mngr_process_node;
3378 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3381 ikev2_main_t *km = &ikev2_main;
3382 ipsec_main_t *im = &ipsec_main;
3387 vlib_process_wait_for_event_or_clock (vm, 1);
3388 vlib_process_get_events (vm, NULL);
3390 /* process ike child sas */
3391 ikev2_main_per_thread_data_t *tkm;
3392 vec_foreach (tkm, km->per_thread_data)
3396 pool_foreach (sa, tkm->sas, ({
3397 ikev2_child_sa_t *c;
3398 vec_foreach (c, sa->childs)
3400 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3406 /* process ipsec sas */
3409 pool_foreach (sa, im->sad, ({
3410 ikev2_mngr_process_ipsec_sa(sa);
3416 vlib_process_wait_for_event_or_clock (vm, 5);
3417 vlib_process_get_events (vm, NULL);
3426 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3427 .function = ikev2_mngr_process_fn,
3428 .type = VLIB_NODE_TYPE_PROCESS,
3430 "ikev2-manager-process",
3436 * fd.io coding-style-patch-verification: ON
3439 * eval: (c-set-style "gnu")