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 || payload == IKEV2_PAYLOAD_IDR) /* 35, 36 */
880 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
882 if (sa->is_initiator)
884 sa->r_id.type = id->id_type;
885 vec_free (sa->r_id.data);
886 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
890 sa->i_id.type = id->id_type;
891 vec_free (sa->i_id.data);
892 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
895 clib_warning ("received payload %s, len %u id_type %u",
896 (payload == IKEV2_PAYLOAD_IDI ? "IDi" : "IDr"),
897 plen - sizeof (*id), id->id_type);
899 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
901 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
903 if (sa->is_initiator)
905 sa->r_auth.method = a->auth_method;
906 vec_free (sa->r_auth.data);
907 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
911 sa->i_auth.method = a->auth_method;
912 vec_free (sa->i_auth.data);
913 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
916 clib_warning ("received payload AUTH, len %u auth_type %u",
917 plen - sizeof (*a), a->auth_method);
919 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
921 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
922 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
924 sa->initial_contact = 1;
928 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
930 ikev2_parse_vendor_payload (ikep);
932 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
934 clib_warning ("received payload TSi, len %u",
935 plen - sizeof (*ikep));
937 vec_free (first_child_sa->tsi);
938 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
940 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
942 clib_warning ("received payload TSr, len %u",
943 plen - sizeof (*ikep));
945 vec_free (first_child_sa->tsr);
946 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
950 clib_warning ("unknown payload %u flags %x length %u data %u",
951 payload, ikep->flags, plen - 4,
952 format_hex_bytes, ikep->payload, plen - 4);
954 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
956 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
957 sa->unsupported_cp = payload;
962 payload = ikep->nextpayload;
967 vec_free (plaintext);
971 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
975 u32 len = clib_net_to_host_u32 (ike->length);
976 u8 payload = ike->nextpayload;
979 ike_payload_header_t *ikep;
982 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
983 "exchange %x flags %x msgid %x length %u",
984 clib_net_to_host_u64 (ike->ispi),
985 clib_net_to_host_u64 (ike->rspi),
986 payload, ike->version,
987 ike->exchange, ike->flags,
988 clib_net_to_host_u32 (ike->msgid), len);
990 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
993 goto cleanup_and_exit;
995 /* process encrypted payload */
997 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
999 ikep = (ike_payload_header_t *) & plaintext[p];
1000 plen = clib_net_to_host_u16 (ikep->length);
1002 if (plen < sizeof (ike_payload_header_t))
1003 goto cleanup_and_exit;
1005 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1007 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1008 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1009 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1012 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1014 sa->del = ikev2_parse_delete_payload (ikep);
1016 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1018 ikev2_parse_vendor_payload (ikep);
1022 clib_warning ("unknown payload %u flags %x length %u data %u",
1023 payload, ikep->flags, plen - 4,
1024 format_hex_bytes, ikep->payload, plen - 4);
1026 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1028 sa->unsupported_cp = payload;
1033 payload = ikep->nextpayload;
1038 vec_free (plaintext);
1042 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1046 u32 len = clib_net_to_host_u32 (ike->length);
1047 u8 payload = ike->nextpayload;
1050 u8 nonce[IKEV2_NONCE_SIZE];
1052 ike_payload_header_t *ikep;
1054 ikev2_notify_t *n = 0;
1055 ikev2_ts_t *tsi = 0;
1056 ikev2_ts_t *tsr = 0;
1057 ikev2_sa_proposal_t *proposal = 0;
1058 ikev2_child_sa_t *child_sa;
1060 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
1061 "exchange %x flags %x msgid %x length %u",
1062 clib_net_to_host_u64 (ike->ispi),
1063 clib_net_to_host_u64 (ike->rspi),
1064 payload, ike->version,
1065 ike->exchange, ike->flags,
1066 clib_net_to_host_u32 (ike->msgid), len);
1068 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1071 goto cleanup_and_exit;
1073 /* process encrypted payload */
1075 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1077 ikep = (ike_payload_header_t *) & plaintext[p];
1078 plen = clib_net_to_host_u16 (ikep->length);
1080 if (plen < sizeof (ike_payload_header_t))
1081 goto cleanup_and_exit;
1083 else if (payload == IKEV2_PAYLOAD_SA)
1085 proposal = ikev2_parse_sa_payload (ikep);
1087 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1089 n = ikev2_parse_notify_payload (ikep);
1090 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1095 else if (payload == IKEV2_PAYLOAD_DELETE)
1097 sa->del = ikev2_parse_delete_payload (ikep);
1099 else if (payload == IKEV2_PAYLOAD_VENDOR)
1101 ikev2_parse_vendor_payload (ikep);
1103 else if (payload == IKEV2_PAYLOAD_NONCE)
1105 clib_memcpy (nonce, ikep->payload, plen - sizeof (*ikep));
1107 else if (payload == IKEV2_PAYLOAD_TSI)
1109 tsi = ikev2_parse_ts_payload (ikep);
1111 else if (payload == IKEV2_PAYLOAD_TSR)
1113 tsr = ikev2_parse_ts_payload (ikep);
1117 clib_warning ("unknown payload %u flags %x length %u data %u",
1118 payload, ikep->flags, plen - 4,
1119 format_hex_bytes, ikep->payload, plen - 4);
1121 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1123 sa->unsupported_cp = payload;
1128 payload = ikep->nextpayload;
1132 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1134 ikev2_rekey_t *rekey = &sa->rekey[0];
1135 rekey->protocol_id = proposal->protocol_id;
1137 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1138 rekey->i_proposal->spi = rekey->spi;
1139 rekey->r_proposal = proposal;
1143 vec_free (sa->r_nonce);
1144 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1145 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1148 child_sa->rekey_retries = 0;
1153 ikev2_rekey_t *rekey;
1154 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1157 clib_warning ("child SA spi %lx not found", n->spi);
1158 goto cleanup_and_exit;
1160 vec_add2 (sa->rekey, rekey, 1);
1161 rekey->protocol_id = n->protocol_id;
1162 rekey->spi = n->spi;
1163 rekey->i_proposal = proposal;
1165 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1169 vec_free (sa->i_nonce);
1170 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1171 /* generate new Nr */
1172 vec_free (sa->r_nonce);
1173 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1174 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1178 vec_free (plaintext);
1183 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1191 ikev2_sa_transform_t *tr_prf;
1194 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1200 nonce = sa->i_nonce;
1201 packet_data = sa->last_sa_init_res_packet_data;
1207 nonce = sa->r_nonce;
1208 packet_data = sa->last_sa_init_req_packet_data;
1211 data = vec_new (u8, 4);
1213 vec_append (data, id->data);
1215 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1216 vec_append (authmsg, packet_data);
1217 vec_append (authmsg, nonce);
1218 vec_append (authmsg, id_hash);
1226 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1228 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1229 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1230 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1231 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1238 ikev2_sa_match_ts (ikev2_sa_t * sa)
1240 ikev2_main_t *km = &ikev2_main;
1242 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1246 pool_foreach (p, km->profiles, ({
1248 if (sa->is_initiator)
1262 if (p->rem_id.type != id->type ||
1263 vec_len(p->rem_id.data) != vec_len(id->data) ||
1264 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1267 vec_foreach(ts, sa->childs[0].tsi)
1269 if (ikev2_ts_cmp(p_tsi, ts))
1276 vec_foreach(ts, sa->childs[0].tsr)
1278 if (ikev2_ts_cmp(p_tsr, ts))
1291 vec_free (sa->childs[0].tsi);
1292 vec_free (sa->childs[0].tsr);
1293 sa->childs[0].tsi = tsi;
1294 sa->childs[0].tsr = tsr;
1300 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1305 ikev2_sa_auth (ikev2_sa_t * sa)
1307 ikev2_main_t *km = &ikev2_main;
1308 ikev2_profile_t *p, *sel_p = 0;
1309 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1310 ikev2_sa_transform_t *tr_prf;
1313 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1315 /* only shared key and rsa signature */
1316 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1317 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1319 clib_warning ("unsupported authentication method %u",
1321 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1325 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1326 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1329 ikev2_auth_t *sa_auth;
1331 if (sa->is_initiator)
1334 sa_auth = &sa->r_auth;
1339 sa_auth = &sa->i_auth;
1343 pool_foreach (p, km->profiles, ({
1346 if (p->rem_id.type != sa_id->type ||
1347 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1348 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1351 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1353 if (!p->auth.data ||
1354 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1357 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1358 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1360 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1362 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1369 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1371 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1374 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1376 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1389 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1391 if (!sa->is_initiator)
1393 vec_free (sa->r_id.data);
1394 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1395 sa->r_id.type = sel_p->loc_id.type;
1397 /* generate our auth data */
1398 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1399 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1401 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1402 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1404 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1406 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1407 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1411 /* select transforms for 1st child sa */
1412 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1413 sa->childs[0].r_proposals =
1414 ikev2_select_proposal (sa->childs[0].i_proposals,
1415 IKEV2_PROTOCOL_ESP);
1420 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1428 ikev2_sa_auth_init (ikev2_sa_t * sa)
1430 ikev2_main_t *km = &ikev2_main;
1431 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1432 ikev2_sa_transform_t *tr_prf;
1435 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1437 /* only shared key and rsa signature */
1438 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1439 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1441 clib_warning ("unsupported authentication method %u",
1443 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1447 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1448 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1449 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1450 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1453 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1455 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1456 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1458 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1460 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1461 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1472 ikev2_create_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1473 ikev2_child_sa_t * child)
1475 ipsec_add_del_tunnel_args_t a;
1476 ikev2_sa_transform_t *tr;
1477 ikev2_sa_proposal_t *proposals;
1480 if (!child->r_proposals)
1482 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1486 memset (&a, 0, sizeof (a));
1488 if (sa->is_initiator)
1490 a.local_ip.as_u32 = sa->iaddr.as_u32;
1491 a.remote_ip.as_u32 = sa->raddr.as_u32;
1492 proposals = child->i_proposals;
1493 a.local_spi = child->r_proposals[0].spi;
1494 a.remote_spi = child->i_proposals[0].spi;
1498 a.local_ip.as_u32 = sa->raddr.as_u32;
1499 a.remote_ip.as_u32 = sa->iaddr.as_u32;
1500 proposals = child->r_proposals;
1501 a.local_spi = child->i_proposals[0].spi;
1502 a.remote_spi = child->r_proposals[0].spi;
1506 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1508 a.esn = tr->esn_type;
1512 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1515 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1517 switch (tr->key_len)
1520 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1523 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1526 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1529 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1536 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1542 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1546 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1549 if (tr->integ_type != IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96)
1551 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1557 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1561 ikev2_calc_child_keys (sa, child);
1563 u8 *loc_ckey, *rem_ckey, *loc_ikey, *rem_ikey;
1564 if (sa->is_initiator)
1566 loc_ikey = child->sk_ai;
1567 rem_ikey = child->sk_ar;
1568 loc_ckey = child->sk_ei;
1569 rem_ckey = child->sk_er;
1573 loc_ikey = child->sk_ar;
1574 rem_ikey = child->sk_ai;
1575 loc_ckey = child->sk_er;
1576 rem_ckey = child->sk_ei;
1579 a.integ_alg = IPSEC_INTEG_ALG_SHA1_96;
1580 a.local_integ_key_len = vec_len (loc_ikey);
1581 clib_memcpy (a.local_integ_key, loc_ikey, a.local_integ_key_len);
1582 a.remote_integ_key_len = vec_len (rem_ikey);
1583 clib_memcpy (a.remote_integ_key, rem_ikey, a.remote_integ_key_len);
1585 a.crypto_alg = encr_type;
1586 a.local_crypto_key_len = vec_len (loc_ckey);
1587 clib_memcpy (a.local_crypto_key, loc_ckey, a.local_crypto_key_len);
1588 a.remote_crypto_key_len = vec_len (rem_ckey);
1589 clib_memcpy (a.remote_crypto_key, rem_ckey, a.remote_crypto_key_len);
1591 if (sa->profile && sa->profile->lifetime)
1593 child->time_to_expiration = vlib_time_now (vnm->vlib_main)
1594 + sa->profile->lifetime;
1595 if (sa->profile->lifetime_jitter)
1597 child->time_to_expiration +=
1598 1 + (rand () % sa->profile->lifetime_jitter);
1602 ipsec_add_del_tunnel_if (&a);
1608 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1609 ikev2_child_sa_t * child)
1611 ipsec_add_del_tunnel_args_t a;
1613 if (sa->is_initiator)
1615 if (!vec_len (child->i_proposals))
1619 a.local_ip.as_u32 = sa->iaddr.as_u32;
1620 a.remote_ip.as_u32 = sa->raddr.as_u32;
1621 a.local_spi = child->r_proposals[0].spi;
1622 a.remote_spi = child->i_proposals[0].spi;
1626 if (!vec_len (child->r_proposals))
1630 a.local_ip.as_u32 = sa->raddr.as_u32;
1631 a.remote_ip.as_u32 = sa->iaddr.as_u32;
1632 a.local_spi = child->i_proposals[0].spi;
1633 a.remote_spi = child->r_proposals[0].spi;
1636 ipsec_add_del_tunnel_if (&a);
1641 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1644 ike_payload_header_t *ph;
1648 ikev2_sa_transform_t *tr_encr, *tr_integ;
1650 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1652 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1654 ikev2_payload_chain_t *chain = 0;
1655 ikev2_payload_new_chain (chain);
1657 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1659 if (sa->r_proposals == 0)
1661 ikev2_payload_add_notify (chain,
1662 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1663 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1665 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1667 u8 *data = vec_new (u8, 2);
1668 ikev2_sa_transform_t *tr_dh;
1670 ikev2_sa_get_td_for_type (sa->r_proposals,
1671 IKEV2_TRANSFORM_TYPE_DH);
1672 ASSERT (tr_dh && tr_dh->dh_type);
1674 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1675 data[1] = (tr_dh->dh_type) & 0xff;
1677 ikev2_payload_add_notify (chain,
1678 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1681 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1683 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1685 u8 *data = vec_new (u8, 1);
1687 data[0] = sa->unsupported_cp;
1688 ikev2_payload_add_notify (chain,
1689 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1695 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1696 ikev2_payload_add_sa (chain, sa->r_proposals);
1697 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1698 ikev2_payload_add_nonce (chain, sa->r_nonce);
1701 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1703 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1705 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1706 ikev2_payload_add_auth (chain, &sa->r_auth);
1707 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1708 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1709 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1711 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1713 ikev2_payload_add_notify (chain,
1714 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1716 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1718 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1720 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1722 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1723 ikev2_payload_add_auth (chain, &sa->r_auth);
1725 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1727 ikev2_payload_add_notify (chain,
1728 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1729 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1730 ikev2_payload_add_auth (chain, &sa->r_auth);
1731 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1732 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1734 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1736 u8 *data = vec_new (u8, 1);
1738 data[0] = sa->unsupported_cp;
1739 ikev2_payload_add_notify (chain,
1740 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1744 else if (sa->state == IKEV2_STATE_SA_INIT)
1746 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1747 ikev2_payload_add_auth (chain, &sa->i_auth);
1748 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1749 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1750 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1754 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1758 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1760 /* if pending delete */
1763 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1765 if (sa->is_initiator)
1766 ikev2_payload_add_delete (chain, sa->del);
1768 /* The response to a request that deletes the IKE SA is an empty
1769 INFORMATIONAL response. */
1770 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1772 /* The response to a request that deletes ESP or AH SAs will contain
1773 delete payloads for the paired SAs going in the other direction. */
1776 ikev2_payload_add_delete (chain, sa->del);
1781 /* received N(AUTHENTICATION_FAILED) */
1782 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1784 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1787 /* received unsupported critical payload */
1788 else if (sa->unsupported_cp)
1790 u8 *data = vec_new (u8, 1);
1792 data[0] = sa->unsupported_cp;
1793 ikev2_payload_add_notify (chain,
1794 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1797 sa->unsupported_cp = 0;
1799 /* else send empty response */
1801 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1803 if (sa->is_initiator)
1806 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
1807 ikev2_notify_t notify;
1808 u8 *data = vec_new (u8, 4);
1809 memset (¬ify, 0, sizeof (notify));
1810 notify.protocol_id = IKEV2_PROTOCOL_ESP;
1811 notify.spi = sa->childs[0].i_proposals->spi;
1812 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
1814 ikev2_payload_add_sa (chain, proposals);
1815 ikev2_payload_add_nonce (chain, sa->i_nonce);
1816 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1817 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1818 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
1827 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
1828 ikev2_payload_add_nonce (chain, sa->r_nonce);
1829 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
1831 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
1833 vec_del1 (sa->rekey, 0);
1835 else if (sa->unsupported_cp)
1837 u8 *data = vec_new (u8, 1);
1839 data[0] = sa->unsupported_cp;
1840 ikev2_payload_add_notify (chain,
1841 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1844 sa->unsupported_cp = 0;
1848 ikev2_payload_add_notify (chain,
1849 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
1856 ike->version = IKE_VERSION_2;
1857 ike->nextpayload = IKEV2_PAYLOAD_SK;
1858 tlen = sizeof (*ike);
1859 if (sa->is_initiator)
1861 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
1862 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
1866 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
1870 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1872 tlen += vec_len (chain->data);
1873 ike->nextpayload = chain->first_payload_type;
1874 ike->length = clib_host_to_net_u32 (tlen);
1875 clib_memcpy (ike->payload, chain->data, vec_len (chain->data));
1877 /* store whole IKE payload - needed for PSK auth */
1878 vec_free (sa->last_sa_init_res_packet_data);
1879 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
1884 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
1887 plen = sizeof (*ph);
1888 ph = (ike_payload_header_t *) & ike->payload[0];
1889 ph->nextpayload = chain->first_payload_type;
1891 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
1894 /* add space for hmac */
1895 plen += tr_integ->key_trunc;
1898 /* payload and total length */
1899 ph->length = clib_host_to_net_u16 (plen);
1900 ike->length = clib_host_to_net_u32 (tlen);
1902 /* calc integrity data for whole packet except hash itself */
1904 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
1905 (u8 *) ike, tlen - tr_integ->key_trunc);
1907 clib_memcpy (ike->payload + tlen - tr_integ->key_trunc - sizeof (*ike),
1908 integ, tr_integ->key_trunc);
1910 /* store whole IKE payload - needed for retransmit */
1911 vec_free (sa->last_res_packet_data);
1912 vec_add (sa->last_res_packet_data, ike, tlen);
1916 ikev2_payload_destroy_chain (chain);
1922 ikev2_retransmit_sa_init (ike_header_t * ike,
1923 ip4_address_t iaddr, ip4_address_t raddr)
1925 ikev2_main_t *km = &ikev2_main;
1927 u32 thread_index = vlib_get_thread_index ();
1930 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
1931 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
1932 sa->iaddr.as_u32 == iaddr.as_u32 &&
1933 sa->raddr.as_u32 == raddr.as_u32)
1936 u32 len = clib_net_to_host_u32(ike->length);
1937 u8 payload = ike->nextpayload;
1939 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
1940 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
1941 u32 plen = clib_net_to_host_u16(ikep->length);
1943 if (plen < sizeof(ike_payload_header_t))
1946 if (payload == IKEV2_PAYLOAD_NONCE)
1948 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
1950 /* req is retransmit */
1951 if (sa->state == IKEV2_STATE_SA_INIT)
1954 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
1955 ike->ispi = tmp->ispi;
1956 ike->rspi = tmp->rspi;
1957 ike->nextpayload = tmp->nextpayload;
1958 ike->version = tmp->version;
1959 ike->exchange = tmp->exchange;
1960 ike->flags = tmp->flags;
1961 ike->msgid = tmp->msgid;
1962 ike->length = tmp->length;
1963 clib_memcpy(ike->payload, tmp->payload,
1964 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
1965 clib_warning("IKE_SA_INIT retransmit from %U to %U",
1966 format_ip4_address, &raddr,
1967 format_ip4_address, &iaddr);
1970 /* else ignore req */
1973 clib_warning("IKE_SA_INIT ignore from %U to %U",
1974 format_ip4_address, &raddr,
1975 format_ip4_address, &iaddr);
1980 payload = ikep->nextpayload;
1987 /* req is not retransmit */
1992 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
1994 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
1997 if (msg_id > sa->last_msg_id)
1999 sa->last_msg_id = msg_id;
2002 /* retransmitted req */
2003 else if (msg_id == sa->last_msg_id)
2006 tmp = (ike_header_t *) sa->last_res_packet_data;
2007 ike->ispi = tmp->ispi;
2008 ike->rspi = tmp->rspi;
2009 ike->nextpayload = tmp->nextpayload;
2010 ike->version = tmp->version;
2011 ike->exchange = tmp->exchange;
2012 ike->flags = tmp->flags;
2013 ike->msgid = tmp->msgid;
2014 ike->length = tmp->length;
2015 clib_memcpy (ike->payload, tmp->payload,
2016 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2017 clib_warning ("IKE msgid %u retransmit from %U to %U",
2019 format_ip4_address, &sa->raddr,
2020 format_ip4_address, &sa->iaddr);
2023 /* old req ignore */
2026 clib_warning ("IKE msgid %u req ignore from %U to %U",
2028 format_ip4_address, &sa->raddr,
2029 format_ip4_address, &sa->iaddr);
2035 ikev2_node_fn (vlib_main_t * vm,
2036 vlib_node_runtime_t * node, vlib_frame_t * frame)
2038 u32 n_left_from, *from, *to_next;
2039 ikev2_next_t next_index;
2040 ikev2_main_t *km = &ikev2_main;
2041 u32 thread_index = vlib_get_thread_index ();
2043 from = vlib_frame_vector_args (frame);
2044 n_left_from = frame->n_vectors;
2045 next_index = node->cached_next_index;
2047 while (n_left_from > 0)
2051 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2053 while (n_left_from > 0 && n_left_to_next > 0)
2057 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2062 ikev2_sa_t *sa0 = 0;
2063 ikev2_sa_t sa; /* temporary store for SA */
2067 /* speculatively enqueue b0 to the current next frame */
2073 n_left_to_next -= 1;
2075 b0 = vlib_get_buffer (vm, bi0);
2076 ike0 = vlib_buffer_get_current (b0);
2077 vlib_buffer_advance (b0, -sizeof (*udp0));
2078 udp0 = vlib_buffer_get_current (b0);
2079 vlib_buffer_advance (b0, -sizeof (*ip40));
2080 ip40 = vlib_buffer_get_current (b0);
2082 if (ike0->version != IKE_VERSION_2)
2084 vlib_node_increment_counter (vm, ikev2_node.index,
2085 IKEV2_ERROR_NOT_IKEV2, 1);
2089 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2092 memset (sa0, 0, sizeof (*sa0));
2094 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2096 if (ike0->rspi == 0)
2098 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2099 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2101 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2105 vlib_node_increment_counter (vm, ikev2_node.index,
2106 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2108 len = clib_net_to_host_u32 (ike0->length);
2113 vlib_node_increment_counter (vm, ikev2_node.index,
2114 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2119 ikev2_process_sa_init_req (vm, sa0, ike0);
2121 if (sa0->state == IKEV2_STATE_SA_INIT)
2123 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2125 ikev2_select_proposal (sa0->i_proposals,
2126 IKEV2_PROTOCOL_IKE);
2127 ikev2_generate_sa_init_data (sa0);
2130 if (sa0->state == IKEV2_STATE_SA_INIT
2131 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2133 len = ikev2_generate_message (sa0, ike0, 0);
2136 if (sa0->state == IKEV2_STATE_SA_INIT)
2138 /* add SA to the pool */
2139 pool_get (km->per_thread_data[thread_index].sas,
2141 clib_memcpy (sa0, &sa, sizeof (*sa0));
2143 per_thread_data[thread_index].sa_by_rspi,
2146 km->per_thread_data[thread_index].sas);
2150 ikev2_sa_free_all_vec (sa0);
2156 ikev2_process_sa_init_resp (vm, sa0, ike0);
2158 if (sa0->state == IKEV2_STATE_SA_INIT)
2160 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2161 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2165 pool_elt_at_index (km->sais, p[0]);
2167 ikev2_complete_sa_data (sa0, sai);
2168 ikev2_calc_keys (sa0);
2169 ikev2_sa_auth_init (sa0);
2170 len = ikev2_generate_message (sa0, ike0, 0);
2174 if (sa0->state == IKEV2_STATE_SA_INIT)
2176 /* add SA to the pool */
2177 pool_get (km->per_thread_data[thread_index].sas, sa0);
2178 clib_memcpy (sa0, &sa, sizeof (*sa0));
2179 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2181 sa0 - km->per_thread_data[thread_index].sas);
2185 ikev2_sa_free_all_vec (sa0);
2189 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2192 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2193 clib_net_to_host_u64 (ike0->rspi));
2197 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2200 r = ikev2_retransmit_resp (sa0, ike0);
2203 vlib_node_increment_counter (vm, ikev2_node.index,
2204 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2206 len = clib_net_to_host_u32 (ike0->length);
2211 vlib_node_increment_counter (vm, ikev2_node.index,
2212 IKEV2_ERROR_IKE_REQ_IGNORE,
2217 ikev2_process_auth_req (vm, sa0, ike0);
2218 ikev2_sa_auth (sa0);
2219 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2221 ikev2_initial_contact_cleanup (sa0);
2222 ikev2_sa_match_ts (sa0);
2223 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2224 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2228 if (sa0->is_initiator)
2230 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2234 pool_elt_at_index (km->sais, p[0]);
2235 hash_unset (km->sa_by_ispi, sai->ispi);
2236 ikev2_sa_free_all_vec (sai);
2237 pool_put (km->sais, sai);
2242 len = ikev2_generate_message (sa0, ike0, 0);
2246 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2249 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2250 clib_net_to_host_u64 (ike0->rspi));
2254 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2257 r = ikev2_retransmit_resp (sa0, ike0);
2260 vlib_node_increment_counter (vm, ikev2_node.index,
2261 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2263 len = clib_net_to_host_u32 (ike0->length);
2268 vlib_node_increment_counter (vm, ikev2_node.index,
2269 IKEV2_ERROR_IKE_REQ_IGNORE,
2274 ikev2_process_informational_req (vm, sa0, ike0);
2277 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2279 ikev2_delete_t *d, *tmp, *resp = 0;
2280 vec_foreach (d, sa0->del)
2282 ikev2_child_sa_t *ch_sa;
2283 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2285 !sa0->is_initiator);
2288 ikev2_delete_tunnel_interface (km->vnet_main,
2290 if (!sa0->is_initiator)
2292 vec_add2 (resp, tmp, 1);
2293 tmp->protocol_id = d->protocol_id;
2294 tmp->spi = ch_sa->r_proposals[0].spi;
2296 ikev2_sa_del_child_sa (sa0, ch_sa);
2299 if (!sa0->is_initiator)
2301 vec_free (sa0->del);
2306 if (!sa0->is_initiator)
2308 len = ikev2_generate_message (sa0, ike0, 0);
2312 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2315 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2316 clib_net_to_host_u64 (ike0->rspi));
2320 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2323 r = ikev2_retransmit_resp (sa0, ike0);
2326 vlib_node_increment_counter (vm, ikev2_node.index,
2327 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2329 len = clib_net_to_host_u32 (ike0->length);
2334 vlib_node_increment_counter (vm, ikev2_node.index,
2335 IKEV2_ERROR_IKE_REQ_IGNORE,
2340 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2343 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2345 ikev2_child_sa_t *child;
2346 vec_add2 (sa0->childs, child, 1);
2347 child->r_proposals = sa0->rekey[0].r_proposal;
2348 child->i_proposals = sa0->rekey[0].i_proposal;
2349 child->tsi = sa0->rekey[0].tsi;
2350 child->tsr = sa0->rekey[0].tsr;
2351 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2354 if (sa0->is_initiator)
2356 vec_del1 (sa0->rekey, 0);
2360 len = ikev2_generate_message (sa0, ike0, 0);
2367 clib_warning ("IKEv2 exchange %u packet received from %U to %U",
2369 format_ip4_address, ip40->src_address.as_u8,
2370 format_ip4_address, ip40->dst_address.as_u8);
2374 /* if we are sending packet back, rewrite headers */
2377 next0 = IKEV2_NEXT_IP4_LOOKUP;
2378 if (sa0->is_initiator)
2380 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2381 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2385 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2386 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2389 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2391 b0->current_length =
2392 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2393 ip40->length = clib_host_to_net_u16 (b0->current_length);
2394 ip40->checksum = ip4_header_checksum (ip40);
2397 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2398 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2400 ikev2_child_sa_t *c;
2402 vec_foreach (c, sa0->childs)
2403 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2405 ikev2_delete_sa (sa0);
2407 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2409 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2410 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2412 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2413 t->sw_if_index = sw_if_index0;
2414 t->next_index = next0;
2417 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2418 n_left_to_next, bi0, next0);
2421 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2424 vlib_node_increment_counter (vm, ikev2_node.index,
2425 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2426 return frame->n_vectors;
2430 VLIB_REGISTER_NODE (ikev2_node,static) = {
2431 .function = ikev2_node_fn,
2433 .vector_size = sizeof (u32),
2434 .format_trace = format_ikev2_trace,
2435 .type = VLIB_NODE_TYPE_INTERNAL,
2437 .n_errors = ARRAY_LEN(ikev2_error_strings),
2438 .error_strings = ikev2_error_strings,
2440 .n_next_nodes = IKEV2_N_NEXT,
2443 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2444 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2450 static clib_error_t *
2451 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2452 ikev2_transforms_set * ts,
2453 ikev2_sa_proposal_t ** proposals, int is_ike)
2456 ikev2_main_t *km = &ikev2_main;
2457 ikev2_sa_proposal_t *proposal;
2458 vec_add2 (*proposals, proposal, 1);
2459 ikev2_sa_transform_t *td;
2464 vec_foreach (td, km->supported_transforms)
2466 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2467 && td->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC
2468 && td->key_len == ts->crypto_key_size / 8)
2471 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2472 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2473 vec_add (td->attrs, (u8 *) attr, 4);
2474 vec_add1 (proposal->transforms, *td);
2483 r = clib_error_return (0, "Unsupported algorithm");
2489 vec_foreach (td, km->supported_transforms)
2491 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2492 && td->integ_type == IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96)
2494 vec_add1 (proposal->transforms, *td);
2501 r = clib_error_return (0, "Unsupported algorithm");
2509 vec_foreach (td, km->supported_transforms)
2511 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2512 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA1)
2514 vec_add1 (proposal->transforms, *td);
2521 r = clib_error_return (0, "Unsupported algorithm");
2528 vec_foreach (td, km->supported_transforms)
2530 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2532 vec_add1 (proposal->transforms, *td);
2535 sa->dh_group = td->dh_type;
2543 r = clib_error_return (0, "Unsupported algorithm");
2550 vec_foreach (td, km->supported_transforms)
2552 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2554 vec_add1 (proposal->transforms, *td);
2561 r = clib_error_return (0, "Unsupported algorithm");
2570 static ikev2_profile_t *
2571 ikev2_profile_index_by_name (u8 * name)
2573 ikev2_main_t *km = &ikev2_main;
2576 p = mhash_get (&km->profile_index_by_name, name);
2580 return pool_elt_at_index (km->profiles, p[0]);
2585 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2594 b0 = vlib_get_buffer (vm, bi0);
2595 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2596 udp0 = vlib_buffer_get_current (b0);
2597 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2598 ip40 = vlib_buffer_get_current (b0);
2601 ip40->ip_version_and_header_length = 0x45;
2603 ip40->fragment_id = 0;
2604 ip40->flags_and_fragment_offset = 0;
2606 ip40->protocol = IP_PROTOCOL_UDP;
2607 ip40->dst_address.as_u32 = dst->as_u32;
2608 ip40->src_address.as_u32 = src->as_u32;
2609 udp0->dst_port = clib_host_to_net_u16 (500);
2610 udp0->src_port = clib_host_to_net_u16 (500);
2611 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2613 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2614 ip40->length = clib_host_to_net_u16 (b0->current_length);
2615 ip40->checksum = ip4_header_checksum (ip40);
2618 /* send the request */
2619 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2620 to_next = vlib_frame_vector_args (f);
2623 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2628 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2631 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2636 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2637 *ike = vlib_buffer_get_current (b0);
2642 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2644 ikev2_main_t *km = &ikev2_main;
2646 km->pkey = ikev2_load_key_file (file);
2647 if (km->pkey == NULL)
2648 return clib_error_return (0, "load key '%s' failed", file);
2654 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2656 ikev2_main_t *km = &ikev2_main;
2661 if (ikev2_profile_index_by_name (name))
2662 return clib_error_return (0, "policy %v already exists", name);
2664 pool_get (km->profiles, p);
2665 memset (p, 0, sizeof (*p));
2666 p->name = vec_dup (name);
2667 p->responder.sw_if_index = ~0;
2668 uword index = p - km->profiles;
2669 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2673 p = ikev2_profile_index_by_name (name);
2675 return clib_error_return (0, "policy %v does not exists", name);
2678 pool_put (km->profiles, p);
2679 mhash_unset (&km->profile_index_by_name, name, 0);
2685 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2686 u8 * auth_data, u8 data_hex_format)
2691 p = ikev2_profile_index_by_name (name);
2695 r = clib_error_return (0, "unknown profile %v", name);
2698 vec_free (p->auth.data);
2699 p->auth.method = auth_method;
2700 p->auth.data = vec_dup (auth_data);
2701 p->auth.hex = data_hex_format;
2703 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2705 vec_add1 (p->auth.data, 0);
2707 EVP_PKEY_free (p->auth.key);
2708 p->auth.key = ikev2_load_cert_file (auth_data);
2709 if (p->auth.key == NULL)
2710 return clib_error_return (0, "load cert '%s' failed", auth_data);
2717 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2723 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2724 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2726 r = clib_error_return (0, "unsupported identity type %U",
2727 format_ikev2_id_type, id_type);
2731 p = ikev2_profile_index_by_name (name);
2735 r = clib_error_return (0, "unknown profile %v", name);
2741 vec_free (p->loc_id.data);
2742 p->loc_id.type = id_type;
2743 p->loc_id.data = vec_dup (data);
2747 vec_free (p->rem_id.data);
2748 p->rem_id.type = id_type;
2749 p->rem_id.data = vec_dup (data);
2756 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2757 u16 start_port, u16 end_port, ip4_address_t start_addr,
2758 ip4_address_t end_addr, int is_local)
2763 p = ikev2_profile_index_by_name (name);
2767 r = clib_error_return (0, "unknown profile %v", name);
2773 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2774 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2775 p->loc_ts.start_port = start_port;
2776 p->loc_ts.end_port = end_port;
2777 p->loc_ts.protocol_id = protocol_id;
2778 p->loc_ts.ts_type = 7;
2782 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2783 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2784 p->rem_ts.start_port = start_port;
2785 p->rem_ts.end_port = end_port;
2786 p->rem_ts.protocol_id = protocol_id;
2787 p->rem_ts.ts_type = 7;
2795 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
2796 u32 sw_if_index, ip4_address_t ip4)
2801 p = ikev2_profile_index_by_name (name);
2805 r = clib_error_return (0, "unknown profile %v", name);
2809 p->responder.sw_if_index = sw_if_index;
2810 p->responder.ip4 = ip4;
2816 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
2817 ikev2_transform_encr_type_t crypto_alg,
2818 ikev2_transform_integ_type_t integ_alg,
2819 ikev2_transform_dh_type_t dh_type,
2820 u32 crypto_key_size)
2825 p = ikev2_profile_index_by_name (name);
2829 r = clib_error_return (0, "unknown profile %v", name);
2833 p->ike_ts.crypto_alg = crypto_alg;
2834 p->ike_ts.integ_alg = integ_alg;
2835 p->ike_ts.dh_type = dh_type;
2836 p->ike_ts.crypto_key_size = crypto_key_size;
2841 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
2842 ikev2_transform_encr_type_t crypto_alg,
2843 ikev2_transform_integ_type_t integ_alg,
2844 ikev2_transform_dh_type_t dh_type,
2845 u32 crypto_key_size)
2850 p = ikev2_profile_index_by_name (name);
2854 r = clib_error_return (0, "unknown profile %v", name);
2858 p->esp_ts.crypto_alg = crypto_alg;
2859 p->esp_ts.integ_alg = integ_alg;
2860 p->esp_ts.dh_type = dh_type;
2861 p->esp_ts.crypto_key_size = crypto_key_size;
2866 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
2867 u64 lifetime, u32 jitter, u32 handover,
2873 p = ikev2_profile_index_by_name (name);
2877 r = clib_error_return (0, "unknown profile %v", name);
2881 p->lifetime = lifetime;
2882 p->lifetime_jitter = jitter;
2883 p->handover = handover;
2884 p->lifetime_maxdata = maxdata;
2889 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
2893 ip4_main_t *im = &ip4_main;
2894 ikev2_main_t *km = &ikev2_main;
2896 p = ikev2_profile_index_by_name (name);
2900 r = clib_error_return (0, "unknown profile %v", name);
2904 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
2906 r = clib_error_return (0, "responder not set for profile %v", name);
2911 /* Create the Initiator Request */
2915 ip_lookup_main_t *lm = &im->lookup_main;
2917 int len = sizeof (ike_header_t);
2919 /* Get own iface IP */
2921 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
2922 ip_interface_address_t *if_add =
2923 pool_elt_at_index (lm->if_address_pool, if_add_index0);
2924 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
2926 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
2928 /* Prepare the SA and the IKE payload */
2930 memset (&sa, 0, sizeof (ikev2_sa_t));
2931 ikev2_payload_chain_t *chain = 0;
2932 ikev2_payload_new_chain (chain);
2934 /* Build the IKE proposal payload */
2935 ikev2_sa_proposal_t *proposals = 0;
2936 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
2937 proposals[0].proposal_num = 1;
2938 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
2940 /* Add and then cleanup proposal data */
2941 ikev2_payload_add_sa (chain, proposals);
2942 ikev2_sa_free_proposal_vector (&proposals);
2944 sa.is_initiator = 1;
2946 sa.state = IKEV2_STATE_SA_INIT;
2947 ikev2_generate_sa_init_data (&sa);
2948 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
2949 ikev2_payload_add_nonce (chain, sa.i_nonce);
2951 /* Build the child SA proposal */
2952 vec_resize (sa.childs, 1);
2953 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
2954 &sa.childs[0].i_proposals, 0);
2955 sa.childs[0].i_proposals[0].proposal_num = 1;
2956 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
2957 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
2958 sizeof (sa.childs[0].i_proposals[0].spi));
2962 /* Add NAT detection notification messages (mandatory) */
2963 u8 nat_detection_source[8 + 8 + 4 + 2];
2964 u8 *nat_detection_sha1 = vec_new (u8, 20);
2966 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
2967 clib_memcpy (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
2968 tmpspi = clib_host_to_net_u64 (sa.rspi);
2969 clib_memcpy (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
2970 u16 tmpport = clib_host_to_net_u16 (500);
2971 clib_memcpy (&nat_detection_source[8 + 8 + 4], &tmpport,
2973 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
2974 clib_memcpy (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
2975 SHA1 (nat_detection_source, sizeof (nat_detection_source),
2976 nat_detection_sha1);
2977 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2978 nat_detection_sha1);
2979 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
2980 clib_memcpy (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
2981 SHA1 (nat_detection_source, sizeof (nat_detection_source),
2982 nat_detection_sha1);
2983 ikev2_payload_add_notify (chain,
2984 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2985 nat_detection_sha1);
2986 vec_free (nat_detection_sha1);
2988 u8 *sig_hash_algo = vec_new (u8, 8);
2989 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
2990 clib_memcpy (sig_hash_algo, &tmpsig, sizeof (tmpsig));
2991 ikev2_payload_add_notify (chain,
2992 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
2994 vec_free (sig_hash_algo);
2997 /* Buffer update and bolierplate */
2998 len += vec_len (chain->data);
2999 ike0->nextpayload = chain->first_payload_type;
3000 ike0->length = clib_host_to_net_u32 (len);
3001 clib_memcpy (ike0->payload, chain->data, vec_len (chain->data));
3002 ikev2_payload_destroy_chain (chain);
3004 ike0->version = IKE_VERSION_2;
3005 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3006 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3007 ike0->ispi = sa.ispi;
3009 /* store whole IKE payload - needed for PSK auth */
3010 vec_free (sa.last_sa_init_req_packet_data);
3011 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3013 /* add data to the SA then add it to the pool */
3014 sa.iaddr.as_u32 = if_ip->as_u32;
3015 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3016 sa.i_id.type = p->loc_id.type;
3017 sa.i_id.data = vec_dup (p->loc_id.data);
3018 sa.i_auth.method = p->auth.method;
3019 sa.i_auth.hex = p->auth.hex;
3020 sa.i_auth.data = vec_dup (p->auth.data);
3021 sa.i_auth.key = vec_dup (p->auth.key);
3022 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3023 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3025 /* add SA to the pool */
3026 ikev2_sa_t *sa0 = 0;
3027 pool_get (km->sais, sa0);
3028 clib_memcpy (sa0, &sa, sizeof (*sa0));
3029 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3031 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3039 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3040 ikev2_child_sa_t * csa)
3042 /* Create the Initiator notification for child SA removal */
3043 ikev2_main_t *km = &ikev2_main;
3048 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3051 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3052 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3053 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3054 vec_resize (sa->del, 1);
3055 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3056 sa->del->spi = csa->i_proposals->spi;
3057 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3058 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3059 len = ikev2_generate_message (sa, ike0, 0);
3061 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3063 /* delete local child SA */
3064 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3065 ikev2_sa_del_child_sa (sa, csa);
3069 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3072 ikev2_main_t *km = &ikev2_main;
3073 ikev2_main_per_thread_data_t *tkm;
3074 ikev2_sa_t *fsa = 0;
3075 ikev2_child_sa_t *fchild = 0;
3077 /* Search for the child SA */
3078 vec_foreach (tkm, km->per_thread_data)
3084 pool_foreach (sa, tkm->sas, ({
3085 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3095 if (!fchild || !fsa)
3097 r = clib_error_return (0, "Child SA not found");
3102 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3109 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3112 ikev2_main_t *km = &ikev2_main;
3113 ikev2_main_per_thread_data_t *tkm;
3114 ikev2_sa_t *fsa = 0;
3115 ikev2_main_per_thread_data_t *ftkm = 0;
3117 /* Search for the IKE SA */
3118 vec_foreach (tkm, km->per_thread_data)
3124 pool_foreach (sa, tkm->sas, ({
3125 if (sa->ispi == ispi)
3137 r = clib_error_return (0, "IKE SA not found");
3142 /* Create the Initiator notification for IKE SA removal */
3148 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3151 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3152 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3153 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3154 vec_resize (fsa->del, 1);
3155 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3156 fsa->del->spi = ispi;
3157 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3158 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3159 len = ikev2_generate_message (fsa, ike0, 0);
3161 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3165 /* delete local SA */
3166 ikev2_child_sa_t *c;
3167 vec_foreach (c, fsa->childs)
3169 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3170 ikev2_sa_del_child_sa (fsa, c);
3172 ikev2_sa_free_all_vec (fsa);
3173 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3176 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3177 pool_put (ftkm->sas, fsa);
3185 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3186 ikev2_child_sa_t * csa)
3188 /* Create the Initiator request for create child SA */
3194 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3197 ike0->version = IKE_VERSION_2;
3198 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3199 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3200 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3201 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3202 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3203 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3205 ikev2_rekey_t *rekey;
3206 vec_add2 (sa->rekey, rekey, 1);
3207 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3210 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3211 rekey->spi = proposals[0].spi;
3212 rekey->ispi = csa->i_proposals->spi;
3213 len = ikev2_generate_message (sa, ike0, proposals);
3214 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3215 vec_free (proposals);
3219 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3222 ikev2_main_t *km = &ikev2_main;
3223 ikev2_main_per_thread_data_t *tkm;
3224 ikev2_sa_t *fsa = 0;
3225 ikev2_child_sa_t *fchild = 0;
3227 /* Search for the child SA */
3228 vec_foreach (tkm, km->per_thread_data)
3234 pool_foreach (sa, tkm->sas, ({
3235 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3245 if (!fchild || !fsa)
3247 r = clib_error_return (0, "Child SA not found");
3252 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3259 ikev2_init (vlib_main_t * vm)
3261 ikev2_main_t *km = &ikev2_main;
3262 clib_error_t *error;
3263 vlib_thread_main_t *tm = vlib_get_thread_main ();
3266 memset (km, 0, sizeof (ikev2_main_t));
3267 km->vnet_main = vnet_get_main ();
3270 ikev2_crypto_init (km);
3272 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3274 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3275 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3277 km->per_thread_data[thread_id].sa_by_rspi =
3278 hash_create (0, sizeof (uword));
3281 km->sa_by_ispi = hash_create (0, sizeof (uword));
3284 if ((error = vlib_call_init_function (vm, ikev2_cli_init)))
3287 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3294 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3296 ikev2_main_t *km = &ikev2_main;
3297 vlib_main_t *vm = km->vlib_main;
3298 f64 now = vlib_time_now (vm);
3301 if (sa->is_initiator && sa->profile && csa->time_to_expiration
3302 && now > csa->time_to_expiration)
3304 if (!csa->is_expired || csa->rekey_retries > 0)
3306 ikev2_rekey_child_sa_internal (vm, sa, csa);
3307 csa->time_to_expiration = now + sa->profile->handover;
3308 csa->is_expired = 1;
3309 if (csa->rekey_retries == 0)
3311 csa->rekey_retries = 5;
3313 else if (csa->rekey_retries > 0)
3315 csa->rekey_retries--;
3316 clib_warning ("Rekeing Child SA 0x%x, retries left %d",
3317 csa->i_proposals->spi, csa->rekey_retries);
3318 if (csa->rekey_retries == 0)
3320 csa->rekey_retries = -1;
3327 csa->time_to_expiration = 0;
3328 ikev2_delete_child_sa_internal (vm, sa, csa);
3337 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3339 ikev2_main_t *km = &ikev2_main;
3340 vlib_main_t *vm = km->vlib_main;
3341 ikev2_main_per_thread_data_t *tkm;
3342 ikev2_sa_t *fsa = 0;
3343 ikev2_child_sa_t *fchild = 0;
3344 f64 now = vlib_time_now (vm);
3346 /* Search for the SA and child SA */
3347 vec_foreach (tkm, km->per_thread_data)
3353 pool_foreach (sa, tkm->sas, ({
3354 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3364 if (fchild && fsa && fsa->profile && fsa->profile->lifetime_maxdata)
3366 if (!fchild->is_expired
3367 && ipsec_sa->total_data_size > fsa->profile->lifetime_maxdata)
3369 fchild->time_to_expiration = now;
3374 static vlib_node_registration_t ikev2_mngr_process_node;
3377 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3380 ikev2_main_t *km = &ikev2_main;
3381 ipsec_main_t *im = &ipsec_main;
3386 vlib_process_wait_for_event_or_clock (vm, 1);
3387 vlib_process_get_events (vm, NULL);
3389 /* process ike child sas */
3390 ikev2_main_per_thread_data_t *tkm;
3391 vec_foreach (tkm, km->per_thread_data)
3395 pool_foreach (sa, tkm->sas, ({
3396 ikev2_child_sa_t *c;
3397 vec_foreach (c, sa->childs)
3399 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3405 /* process ipsec sas */
3408 pool_foreach (sa, im->sad, ({
3409 ikev2_mngr_process_ipsec_sa(sa);
3415 vlib_process_wait_for_event_or_clock (vm, 5);
3416 vlib_process_get_events (vm, NULL);
3425 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3426 .function = ikev2_mngr_process_fn,
3427 .type = VLIB_NODE_TYPE_PROCESS,
3429 "ikev2-manager-process",
3435 * fd.io coding-style-patch-verification: ON
3438 * eval: (c-set-style "gnu")