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 cpu_index = os_get_cpu_number ();
309 ikev2_sa_free_all_vec (sa);
311 p = hash_get (km->per_thread_data[cpu_index].sa_by_rspi, sa->rspi);
314 hash_unset (km->per_thread_data[cpu_index].sa_by_rspi, sa->rspi);
315 pool_put (km->per_thread_data[cpu_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 cpu_index = os_get_cpu_number ();
781 if (!sa->initial_contact)
784 /* find old IKE SAs with the same authenticated identity */
786 pool_foreach (tmp, km->per_thread_data[cpu_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[cpu_index].sas);
797 for (i = 0; i < vec_len (delete); i++)
799 tmp = pool_elt_at_index (km->per_thread_data[cpu_index].sas, delete[i]);
800 vec_foreach (c, tmp->childs)
801 ikev2_delete_tunnel_interface (km->vnet_main, tmp, c);
802 ikev2_delete_sa (tmp);
806 sa->initial_contact = 0;
810 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
812 ikev2_child_sa_t *first_child_sa;
814 u32 len = clib_net_to_host_u32 (ike->length);
815 u8 payload = ike->nextpayload;
818 ike_payload_header_t *ikep;
821 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
822 "exchange %x flags %x msgid %x length %u",
823 clib_net_to_host_u64 (ike->ispi),
824 clib_net_to_host_u64 (ike->rspi),
825 payload, ike->version,
826 ike->exchange, ike->flags,
827 clib_net_to_host_u32 (ike->msgid), len);
829 ikev2_calc_keys (sa);
831 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
835 if (sa->unsupported_cp)
836 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
837 goto cleanup_and_exit;
840 /* select or create 1st child SA */
841 if (sa->is_initiator)
843 first_child_sa = &sa->childs[0];
847 ikev2_sa_free_all_child_sa (&sa->childs);
848 vec_add2 (sa->childs, first_child_sa, 1);
852 /* process encrypted payload */
854 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
856 ikep = (ike_payload_header_t *) & plaintext[p];
857 plen = clib_net_to_host_u16 (ikep->length);
859 if (plen < sizeof (ike_payload_header_t))
860 goto cleanup_and_exit;
862 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
864 clib_warning ("received payload SA, len %u", plen - sizeof (*ikep));
865 if (sa->is_initiator)
867 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
868 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
872 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
873 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
876 else if (payload == IKEV2_PAYLOAD_IDI || payload == IKEV2_PAYLOAD_IDR) /* 35, 36 */
878 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
880 if (sa->is_initiator)
882 sa->r_id.type = id->id_type;
883 vec_free (sa->r_id.data);
884 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
888 sa->i_id.type = id->id_type;
889 vec_free (sa->i_id.data);
890 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
893 clib_warning ("received payload %s, len %u id_type %u",
894 (payload == IKEV2_PAYLOAD_IDI ? "IDi" : "IDr"),
895 plen - sizeof (*id), id->id_type);
897 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
899 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
901 if (sa->is_initiator)
903 sa->r_auth.method = a->auth_method;
904 vec_free (sa->r_auth.data);
905 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
909 sa->i_auth.method = a->auth_method;
910 vec_free (sa->i_auth.data);
911 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
914 clib_warning ("received payload AUTH, len %u auth_type %u",
915 plen - sizeof (*a), a->auth_method);
917 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
919 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
920 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
922 sa->initial_contact = 1;
926 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
928 ikev2_parse_vendor_payload (ikep);
930 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
932 clib_warning ("received payload TSi, len %u",
933 plen - sizeof (*ikep));
935 vec_free (first_child_sa->tsi);
936 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
938 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
940 clib_warning ("received payload TSr, len %u",
941 plen - sizeof (*ikep));
943 vec_free (first_child_sa->tsr);
944 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
948 clib_warning ("unknown payload %u flags %x length %u data %u",
949 payload, ikep->flags, plen - 4,
950 format_hex_bytes, ikep->payload, plen - 4);
952 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
954 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
955 sa->unsupported_cp = payload;
960 payload = ikep->nextpayload;
965 vec_free (plaintext);
969 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
973 u32 len = clib_net_to_host_u32 (ike->length);
974 u8 payload = ike->nextpayload;
977 ike_payload_header_t *ikep;
980 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
981 "exchange %x flags %x msgid %x length %u",
982 clib_net_to_host_u64 (ike->ispi),
983 clib_net_to_host_u64 (ike->rspi),
984 payload, ike->version,
985 ike->exchange, ike->flags,
986 clib_net_to_host_u32 (ike->msgid), len);
988 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
991 goto cleanup_and_exit;
993 /* process encrypted payload */
995 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
997 ikep = (ike_payload_header_t *) & plaintext[p];
998 plen = clib_net_to_host_u16 (ikep->length);
1000 if (plen < sizeof (ike_payload_header_t))
1001 goto cleanup_and_exit;
1003 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1005 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1006 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1007 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1010 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1012 sa->del = ikev2_parse_delete_payload (ikep);
1014 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1016 ikev2_parse_vendor_payload (ikep);
1020 clib_warning ("unknown payload %u flags %x length %u data %u",
1021 payload, ikep->flags, plen - 4,
1022 format_hex_bytes, ikep->payload, plen - 4);
1024 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1026 sa->unsupported_cp = payload;
1031 payload = ikep->nextpayload;
1036 vec_free (plaintext);
1040 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1044 u32 len = clib_net_to_host_u32 (ike->length);
1045 u8 payload = ike->nextpayload;
1048 u8 nonce[IKEV2_NONCE_SIZE];
1050 ike_payload_header_t *ikep;
1052 ikev2_notify_t *n = 0;
1053 ikev2_ts_t *tsi = 0;
1054 ikev2_ts_t *tsr = 0;
1055 ikev2_sa_proposal_t *proposal = 0;
1056 ikev2_child_sa_t *child_sa;
1058 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
1059 "exchange %x flags %x msgid %x length %u",
1060 clib_net_to_host_u64 (ike->ispi),
1061 clib_net_to_host_u64 (ike->rspi),
1062 payload, ike->version,
1063 ike->exchange, ike->flags,
1064 clib_net_to_host_u32 (ike->msgid), len);
1066 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1069 goto cleanup_and_exit;
1071 /* process encrypted payload */
1073 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1075 ikep = (ike_payload_header_t *) & plaintext[p];
1076 plen = clib_net_to_host_u16 (ikep->length);
1078 if (plen < sizeof (ike_payload_header_t))
1079 goto cleanup_and_exit;
1081 else if (payload == IKEV2_PAYLOAD_SA)
1083 proposal = ikev2_parse_sa_payload (ikep);
1085 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1087 n = ikev2_parse_notify_payload (ikep);
1088 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1093 else if (payload == IKEV2_PAYLOAD_DELETE)
1095 sa->del = ikev2_parse_delete_payload (ikep);
1097 else if (payload == IKEV2_PAYLOAD_VENDOR)
1099 ikev2_parse_vendor_payload (ikep);
1101 else if (payload == IKEV2_PAYLOAD_NONCE)
1103 clib_memcpy (nonce, ikep->payload, plen - sizeof (*ikep));
1105 else if (payload == IKEV2_PAYLOAD_TSI)
1107 tsi = ikev2_parse_ts_payload (ikep);
1109 else if (payload == IKEV2_PAYLOAD_TSR)
1111 tsr = ikev2_parse_ts_payload (ikep);
1115 clib_warning ("unknown payload %u flags %x length %u data %u",
1116 payload, ikep->flags, plen - 4,
1117 format_hex_bytes, ikep->payload, plen - 4);
1119 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1121 sa->unsupported_cp = payload;
1126 payload = ikep->nextpayload;
1130 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1132 ikev2_rekey_t *rekey = &sa->rekey[0];
1133 rekey->protocol_id = proposal->protocol_id;
1135 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1136 rekey->i_proposal->spi = rekey->spi;
1137 rekey->r_proposal = proposal;
1141 vec_free (sa->r_nonce);
1142 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1143 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1146 child_sa->rekey_retries = 0;
1151 ikev2_rekey_t *rekey;
1152 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1155 clib_warning ("child SA spi %lx not found", n->spi);
1156 goto cleanup_and_exit;
1158 vec_add2 (sa->rekey, rekey, 1);
1159 rekey->protocol_id = n->protocol_id;
1160 rekey->spi = n->spi;
1161 rekey->i_proposal = proposal;
1163 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1167 vec_free (sa->i_nonce);
1168 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1169 /* generate new Nr */
1170 vec_free (sa->r_nonce);
1171 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1172 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1176 vec_free (plaintext);
1181 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1189 ikev2_sa_transform_t *tr_prf;
1192 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1198 nonce = sa->i_nonce;
1199 packet_data = sa->last_sa_init_res_packet_data;
1205 nonce = sa->r_nonce;
1206 packet_data = sa->last_sa_init_req_packet_data;
1209 data = vec_new (u8, 4);
1211 vec_append (data, id->data);
1213 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1214 vec_append (authmsg, packet_data);
1215 vec_append (authmsg, nonce);
1216 vec_append (authmsg, id_hash);
1224 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1226 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1227 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1228 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1229 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1236 ikev2_sa_match_ts (ikev2_sa_t * sa)
1238 ikev2_main_t *km = &ikev2_main;
1240 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1244 pool_foreach (p, km->profiles, ({
1246 if (sa->is_initiator)
1260 if (p->rem_id.type != id->type ||
1261 vec_len(p->rem_id.data) != vec_len(id->data) ||
1262 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1265 vec_foreach(ts, sa->childs[0].tsi)
1267 if (ikev2_ts_cmp(p_tsi, ts))
1274 vec_foreach(ts, sa->childs[0].tsr)
1276 if (ikev2_ts_cmp(p_tsr, ts))
1289 vec_free (sa->childs[0].tsi);
1290 vec_free (sa->childs[0].tsr);
1291 sa->childs[0].tsi = tsi;
1292 sa->childs[0].tsr = tsr;
1298 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1303 ikev2_sa_auth (ikev2_sa_t * sa)
1305 ikev2_main_t *km = &ikev2_main;
1306 ikev2_profile_t *p, *sel_p = 0;
1307 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1308 ikev2_sa_transform_t *tr_prf;
1311 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1313 /* only shared key and rsa signature */
1314 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1315 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1317 clib_warning ("unsupported authentication method %u",
1319 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1323 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1324 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1327 ikev2_auth_t *sa_auth;
1329 if (sa->is_initiator)
1332 sa_auth = &sa->r_auth;
1337 sa_auth = &sa->i_auth;
1341 pool_foreach (p, km->profiles, ({
1344 if (p->rem_id.type != sa_id->type ||
1345 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1346 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1349 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1351 if (!p->auth.data ||
1352 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1355 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1356 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1358 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1360 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1367 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1369 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1372 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1374 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1387 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1389 if (!sa->is_initiator)
1391 vec_free (sa->r_id.data);
1392 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1393 sa->r_id.type = sel_p->loc_id.type;
1395 /* generate our auth data */
1396 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1397 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1399 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1400 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1402 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1404 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1405 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1409 /* select transforms for 1st child sa */
1410 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1411 sa->childs[0].r_proposals =
1412 ikev2_select_proposal (sa->childs[0].i_proposals,
1413 IKEV2_PROTOCOL_ESP);
1418 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1426 ikev2_sa_auth_init (ikev2_sa_t * sa)
1428 ikev2_main_t *km = &ikev2_main;
1429 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1430 ikev2_sa_transform_t *tr_prf;
1433 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1435 /* only shared key and rsa signature */
1436 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1437 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1439 clib_warning ("unsupported authentication method %u",
1441 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1445 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1446 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1447 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1448 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1451 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1453 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1454 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1456 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1458 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1459 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1470 ikev2_create_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1471 ikev2_child_sa_t * child)
1473 ipsec_add_del_tunnel_args_t a;
1474 ikev2_sa_transform_t *tr;
1475 ikev2_sa_proposal_t *proposals;
1478 if (!child->r_proposals)
1480 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1484 memset (&a, 0, sizeof (a));
1486 if (sa->is_initiator)
1488 a.local_ip.as_u32 = sa->iaddr.as_u32;
1489 a.remote_ip.as_u32 = sa->raddr.as_u32;
1490 proposals = child->i_proposals;
1491 a.local_spi = child->r_proposals[0].spi;
1492 a.remote_spi = child->i_proposals[0].spi;
1496 a.local_ip.as_u32 = sa->raddr.as_u32;
1497 a.remote_ip.as_u32 = sa->iaddr.as_u32;
1498 proposals = child->r_proposals;
1499 a.local_spi = child->i_proposals[0].spi;
1500 a.remote_spi = child->r_proposals[0].spi;
1504 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1506 a.esn = tr->esn_type;
1510 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1513 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1515 switch (tr->key_len)
1518 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1521 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1524 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1527 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1534 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1540 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1544 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1547 if (tr->integ_type != IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96)
1549 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1555 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1559 ikev2_calc_child_keys (sa, child);
1561 u8 *loc_ckey, *rem_ckey, *loc_ikey, *rem_ikey;
1562 if (sa->is_initiator)
1564 loc_ikey = child->sk_ai;
1565 rem_ikey = child->sk_ar;
1566 loc_ckey = child->sk_ei;
1567 rem_ckey = child->sk_er;
1571 loc_ikey = child->sk_ar;
1572 rem_ikey = child->sk_ai;
1573 loc_ckey = child->sk_er;
1574 rem_ckey = child->sk_ei;
1577 a.integ_alg = IPSEC_INTEG_ALG_SHA1_96;
1578 a.local_integ_key_len = vec_len (loc_ikey);
1579 clib_memcpy (a.local_integ_key, loc_ikey, a.local_integ_key_len);
1580 a.remote_integ_key_len = vec_len (rem_ikey);
1581 clib_memcpy (a.remote_integ_key, rem_ikey, a.remote_integ_key_len);
1583 a.crypto_alg = encr_type;
1584 a.local_crypto_key_len = vec_len (loc_ckey);
1585 clib_memcpy (a.local_crypto_key, loc_ckey, a.local_crypto_key_len);
1586 a.remote_crypto_key_len = vec_len (rem_ckey);
1587 clib_memcpy (a.remote_crypto_key, rem_ckey, a.remote_crypto_key_len);
1589 if (sa->profile && sa->profile->lifetime)
1591 child->time_to_expiration = vlib_time_now (vnm->vlib_main)
1592 + sa->profile->lifetime;
1593 if (sa->profile->lifetime_jitter)
1595 child->time_to_expiration +=
1596 1 + (rand () % sa->profile->lifetime_jitter);
1600 ipsec_add_del_tunnel_if (&a);
1606 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1607 ikev2_child_sa_t * child)
1609 ipsec_add_del_tunnel_args_t a;
1611 if (sa->is_initiator)
1613 if (!vec_len (child->i_proposals))
1617 a.local_ip.as_u32 = sa->iaddr.as_u32;
1618 a.remote_ip.as_u32 = sa->raddr.as_u32;
1619 a.local_spi = child->r_proposals[0].spi;
1620 a.remote_spi = child->i_proposals[0].spi;
1624 if (!vec_len (child->r_proposals))
1628 a.local_ip.as_u32 = sa->raddr.as_u32;
1629 a.remote_ip.as_u32 = sa->iaddr.as_u32;
1630 a.local_spi = child->i_proposals[0].spi;
1631 a.remote_spi = child->r_proposals[0].spi;
1634 ipsec_add_del_tunnel_if (&a);
1639 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1642 ike_payload_header_t *ph;
1646 ikev2_sa_transform_t *tr_encr, *tr_integ;
1648 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1650 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1652 ikev2_payload_chain_t *chain = 0;
1653 ikev2_payload_new_chain (chain);
1655 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1657 if (sa->r_proposals == 0)
1659 ikev2_payload_add_notify (chain,
1660 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1661 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1663 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1665 u8 *data = vec_new (u8, 2);
1666 ikev2_sa_transform_t *tr_dh;
1668 ikev2_sa_get_td_for_type (sa->r_proposals,
1669 IKEV2_TRANSFORM_TYPE_DH);
1670 ASSERT (tr_dh && tr_dh->dh_type);
1672 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1673 data[1] = (tr_dh->dh_type) & 0xff;
1675 ikev2_payload_add_notify (chain,
1676 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1679 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1681 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1683 u8 *data = vec_new (u8, 1);
1685 data[0] = sa->unsupported_cp;
1686 ikev2_payload_add_notify (chain,
1687 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1693 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1694 ikev2_payload_add_sa (chain, sa->r_proposals);
1695 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1696 ikev2_payload_add_nonce (chain, sa->r_nonce);
1699 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1701 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1703 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1704 ikev2_payload_add_auth (chain, &sa->r_auth);
1705 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1706 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1707 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1709 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1711 ikev2_payload_add_notify (chain,
1712 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1714 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1716 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1718 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1720 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1721 ikev2_payload_add_auth (chain, &sa->r_auth);
1723 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1725 ikev2_payload_add_notify (chain,
1726 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1727 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1728 ikev2_payload_add_auth (chain, &sa->r_auth);
1729 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1730 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1732 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1734 u8 *data = vec_new (u8, 1);
1736 data[0] = sa->unsupported_cp;
1737 ikev2_payload_add_notify (chain,
1738 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1742 else if (sa->state == IKEV2_STATE_SA_INIT)
1744 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1745 ikev2_payload_add_auth (chain, &sa->i_auth);
1746 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1747 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1748 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1752 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1756 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1758 /* if pending delete */
1761 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1763 if (sa->is_initiator)
1764 ikev2_payload_add_delete (chain, sa->del);
1766 /* The response to a request that deletes the IKE SA is an empty
1767 INFORMATIONAL response. */
1768 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1770 /* The response to a request that deletes ESP or AH SAs will contain
1771 delete payloads for the paired SAs going in the other direction. */
1774 ikev2_payload_add_delete (chain, sa->del);
1779 /* received N(AUTHENTICATION_FAILED) */
1780 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1782 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1785 /* received unsupported critical payload */
1786 else if (sa->unsupported_cp)
1788 u8 *data = vec_new (u8, 1);
1790 data[0] = sa->unsupported_cp;
1791 ikev2_payload_add_notify (chain,
1792 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1795 sa->unsupported_cp = 0;
1797 /* else send empty response */
1799 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1801 if (sa->is_initiator)
1804 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
1805 ikev2_notify_t notify;
1806 u8 *data = vec_new (u8, 4);
1807 memset (¬ify, 0, sizeof (notify));
1808 notify.protocol_id = IKEV2_PROTOCOL_ESP;
1809 notify.spi = sa->childs[0].i_proposals->spi;
1810 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
1812 ikev2_payload_add_sa (chain, proposals);
1813 ikev2_payload_add_nonce (chain, sa->i_nonce);
1814 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1815 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1816 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
1825 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
1826 ikev2_payload_add_nonce (chain, sa->r_nonce);
1827 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
1829 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
1831 vec_del1 (sa->rekey, 0);
1833 else if (sa->unsupported_cp)
1835 u8 *data = vec_new (u8, 1);
1837 data[0] = sa->unsupported_cp;
1838 ikev2_payload_add_notify (chain,
1839 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1842 sa->unsupported_cp = 0;
1846 ikev2_payload_add_notify (chain,
1847 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
1854 ike->version = IKE_VERSION_2;
1855 ike->nextpayload = IKEV2_PAYLOAD_SK;
1856 tlen = sizeof (*ike);
1857 if (sa->is_initiator)
1859 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
1860 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
1864 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
1868 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1870 tlen += vec_len (chain->data);
1871 ike->nextpayload = chain->first_payload_type;
1872 ike->length = clib_host_to_net_u32 (tlen);
1873 clib_memcpy (ike->payload, chain->data, vec_len (chain->data));
1875 /* store whole IKE payload - needed for PSK auth */
1876 vec_free (sa->last_sa_init_res_packet_data);
1877 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
1882 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
1885 plen = sizeof (*ph);
1886 ph = (ike_payload_header_t *) & ike->payload[0];
1887 ph->nextpayload = chain->first_payload_type;
1889 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
1892 /* add space for hmac */
1893 plen += tr_integ->key_trunc;
1896 /* payload and total length */
1897 ph->length = clib_host_to_net_u16 (plen);
1898 ike->length = clib_host_to_net_u32 (tlen);
1900 /* calc integrity data for whole packet except hash itself */
1902 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
1903 (u8 *) ike, tlen - tr_integ->key_trunc);
1905 clib_memcpy (ike->payload + tlen - tr_integ->key_trunc - sizeof (*ike),
1906 integ, tr_integ->key_trunc);
1908 /* store whole IKE payload - needed for retransmit */
1909 vec_free (sa->last_res_packet_data);
1910 vec_add (sa->last_res_packet_data, ike, tlen);
1914 ikev2_payload_destroy_chain (chain);
1920 ikev2_retransmit_sa_init (ike_header_t * ike,
1921 ip4_address_t iaddr, ip4_address_t raddr)
1923 ikev2_main_t *km = &ikev2_main;
1925 u32 cpu_index = os_get_cpu_number ();
1928 pool_foreach (sa, km->per_thread_data[cpu_index].sas, ({
1929 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
1930 sa->iaddr.as_u32 == iaddr.as_u32 &&
1931 sa->raddr.as_u32 == raddr.as_u32)
1934 u32 len = clib_net_to_host_u32(ike->length);
1935 u8 payload = ike->nextpayload;
1937 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
1938 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
1939 u32 plen = clib_net_to_host_u16(ikep->length);
1941 if (plen < sizeof(ike_payload_header_t))
1944 if (payload == IKEV2_PAYLOAD_NONCE)
1946 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
1948 /* req is retransmit */
1949 if (sa->state == IKEV2_STATE_SA_INIT)
1952 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
1953 ike->ispi = tmp->ispi;
1954 ike->rspi = tmp->rspi;
1955 ike->nextpayload = tmp->nextpayload;
1956 ike->version = tmp->version;
1957 ike->exchange = tmp->exchange;
1958 ike->flags = tmp->flags;
1959 ike->msgid = tmp->msgid;
1960 ike->length = tmp->length;
1961 clib_memcpy(ike->payload, tmp->payload,
1962 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
1963 clib_warning("IKE_SA_INIT retransmit from %U to %U",
1964 format_ip4_address, &raddr,
1965 format_ip4_address, &iaddr);
1968 /* else ignore req */
1971 clib_warning("IKE_SA_INIT ignore from %U to %U",
1972 format_ip4_address, &raddr,
1973 format_ip4_address, &iaddr);
1978 payload = ikep->nextpayload;
1985 /* req is not retransmit */
1990 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
1992 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
1995 if (msg_id > sa->last_msg_id)
1997 sa->last_msg_id = msg_id;
2000 /* retransmitted req */
2001 else if (msg_id == sa->last_msg_id)
2004 tmp = (ike_header_t *) sa->last_res_packet_data;
2005 ike->ispi = tmp->ispi;
2006 ike->rspi = tmp->rspi;
2007 ike->nextpayload = tmp->nextpayload;
2008 ike->version = tmp->version;
2009 ike->exchange = tmp->exchange;
2010 ike->flags = tmp->flags;
2011 ike->msgid = tmp->msgid;
2012 ike->length = tmp->length;
2013 clib_memcpy (ike->payload, tmp->payload,
2014 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2015 clib_warning ("IKE msgid %u retransmit from %U to %U",
2017 format_ip4_address, &sa->raddr,
2018 format_ip4_address, &sa->iaddr);
2021 /* old req ignore */
2024 clib_warning ("IKE msgid %u req ignore from %U to %U",
2026 format_ip4_address, &sa->raddr,
2027 format_ip4_address, &sa->iaddr);
2033 ikev2_node_fn (vlib_main_t * vm,
2034 vlib_node_runtime_t * node, vlib_frame_t * frame)
2036 u32 n_left_from, *from, *to_next;
2037 ikev2_next_t next_index;
2038 ikev2_main_t *km = &ikev2_main;
2039 u32 cpu_index = os_get_cpu_number ();
2041 from = vlib_frame_vector_args (frame);
2042 n_left_from = frame->n_vectors;
2043 next_index = node->cached_next_index;
2045 while (n_left_from > 0)
2049 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2051 while (n_left_from > 0 && n_left_to_next > 0)
2055 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2060 ikev2_sa_t *sa0 = 0;
2061 ikev2_sa_t sa; /* temporary store for SA */
2065 /* speculatively enqueue b0 to the current next frame */
2071 n_left_to_next -= 1;
2073 b0 = vlib_get_buffer (vm, bi0);
2074 ike0 = vlib_buffer_get_current (b0);
2075 vlib_buffer_advance (b0, -sizeof (*udp0));
2076 udp0 = vlib_buffer_get_current (b0);
2077 vlib_buffer_advance (b0, -sizeof (*ip40));
2078 ip40 = vlib_buffer_get_current (b0);
2080 if (ike0->version != IKE_VERSION_2)
2082 vlib_node_increment_counter (vm, ikev2_node.index,
2083 IKEV2_ERROR_NOT_IKEV2, 1);
2087 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2090 memset (sa0, 0, sizeof (*sa0));
2092 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2094 if (ike0->rspi == 0)
2096 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2097 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2099 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2103 vlib_node_increment_counter (vm, ikev2_node.index,
2104 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2106 len = clib_net_to_host_u32 (ike0->length);
2111 vlib_node_increment_counter (vm, ikev2_node.index,
2112 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2117 ikev2_process_sa_init_req (vm, sa0, ike0);
2119 if (sa0->state == IKEV2_STATE_SA_INIT)
2121 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2123 ikev2_select_proposal (sa0->i_proposals,
2124 IKEV2_PROTOCOL_IKE);
2125 ikev2_generate_sa_init_data (sa0);
2128 if (sa0->state == IKEV2_STATE_SA_INIT
2129 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2131 len = ikev2_generate_message (sa0, ike0, 0);
2134 if (sa0->state == IKEV2_STATE_SA_INIT)
2136 /* add SA to the pool */
2137 pool_get (km->per_thread_data[cpu_index].sas, sa0);
2138 clib_memcpy (sa0, &sa, sizeof (*sa0));
2139 hash_set (km->per_thread_data[cpu_index].sa_by_rspi,
2141 sa0 - km->per_thread_data[cpu_index].sas);
2145 ikev2_sa_free_all_vec (sa0);
2151 ikev2_process_sa_init_resp (vm, sa0, ike0);
2153 if (sa0->state == IKEV2_STATE_SA_INIT)
2155 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2156 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2160 pool_elt_at_index (km->sais, p[0]);
2162 ikev2_complete_sa_data (sa0, sai);
2163 ikev2_calc_keys (sa0);
2164 ikev2_sa_auth_init (sa0);
2165 len = ikev2_generate_message (sa0, ike0, 0);
2169 if (sa0->state == IKEV2_STATE_SA_INIT)
2171 /* add SA to the pool */
2172 pool_get (km->per_thread_data[cpu_index].sas, sa0);
2173 clib_memcpy (sa0, &sa, sizeof (*sa0));
2174 hash_set (km->per_thread_data[cpu_index].sa_by_rspi,
2176 sa0 - km->per_thread_data[cpu_index].sas);
2180 ikev2_sa_free_all_vec (sa0);
2184 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2187 p = hash_get (km->per_thread_data[cpu_index].sa_by_rspi,
2188 clib_net_to_host_u64 (ike0->rspi));
2191 sa0 = pool_elt_at_index (km->per_thread_data[cpu_index].sas,
2194 r = ikev2_retransmit_resp (sa0, ike0);
2197 vlib_node_increment_counter (vm, ikev2_node.index,
2198 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2200 len = clib_net_to_host_u32 (ike0->length);
2205 vlib_node_increment_counter (vm, ikev2_node.index,
2206 IKEV2_ERROR_IKE_REQ_IGNORE,
2211 ikev2_process_auth_req (vm, sa0, ike0);
2212 ikev2_sa_auth (sa0);
2213 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2215 ikev2_initial_contact_cleanup (sa0);
2216 ikev2_sa_match_ts (sa0);
2217 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2218 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2222 if (sa0->is_initiator)
2224 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2228 pool_elt_at_index (km->sais, p[0]);
2229 hash_unset (km->sa_by_ispi, sai->ispi);
2230 ikev2_sa_free_all_vec (sai);
2231 pool_put (km->sais, sai);
2236 len = ikev2_generate_message (sa0, ike0, 0);
2240 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2243 p = hash_get (km->per_thread_data[cpu_index].sa_by_rspi,
2244 clib_net_to_host_u64 (ike0->rspi));
2247 sa0 = pool_elt_at_index (km->per_thread_data[cpu_index].sas,
2250 r = ikev2_retransmit_resp (sa0, ike0);
2253 vlib_node_increment_counter (vm, ikev2_node.index,
2254 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2256 len = clib_net_to_host_u32 (ike0->length);
2261 vlib_node_increment_counter (vm, ikev2_node.index,
2262 IKEV2_ERROR_IKE_REQ_IGNORE,
2267 ikev2_process_informational_req (vm, sa0, ike0);
2270 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2272 ikev2_delete_t *d, *tmp, *resp = 0;
2273 vec_foreach (d, sa0->del)
2275 ikev2_child_sa_t *ch_sa;
2276 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2278 !sa0->is_initiator);
2281 ikev2_delete_tunnel_interface (km->vnet_main,
2283 if (!sa0->is_initiator)
2285 vec_add2 (resp, tmp, 1);
2286 tmp->protocol_id = d->protocol_id;
2287 tmp->spi = ch_sa->r_proposals[0].spi;
2289 ikev2_sa_del_child_sa (sa0, ch_sa);
2292 if (!sa0->is_initiator)
2294 vec_free (sa0->del);
2299 if (!sa0->is_initiator)
2301 len = ikev2_generate_message (sa0, ike0, 0);
2305 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2308 p = hash_get (km->per_thread_data[cpu_index].sa_by_rspi,
2309 clib_net_to_host_u64 (ike0->rspi));
2312 sa0 = pool_elt_at_index (km->per_thread_data[cpu_index].sas,
2315 r = ikev2_retransmit_resp (sa0, ike0);
2318 vlib_node_increment_counter (vm, ikev2_node.index,
2319 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2321 len = clib_net_to_host_u32 (ike0->length);
2326 vlib_node_increment_counter (vm, ikev2_node.index,
2327 IKEV2_ERROR_IKE_REQ_IGNORE,
2332 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2335 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2337 ikev2_child_sa_t *child;
2338 vec_add2 (sa0->childs, child, 1);
2339 child->r_proposals = sa0->rekey[0].r_proposal;
2340 child->i_proposals = sa0->rekey[0].i_proposal;
2341 child->tsi = sa0->rekey[0].tsi;
2342 child->tsr = sa0->rekey[0].tsr;
2343 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2346 if (sa0->is_initiator)
2348 vec_del1 (sa0->rekey, 0);
2352 len = ikev2_generate_message (sa0, ike0, 0);
2359 clib_warning ("IKEv2 exchange %u packet received from %U to %U",
2361 format_ip4_address, ip40->src_address.as_u8,
2362 format_ip4_address, ip40->dst_address.as_u8);
2366 /* if we are sending packet back, rewrite headers */
2369 next0 = IKEV2_NEXT_IP4_LOOKUP;
2370 if (sa0->is_initiator)
2372 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2373 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2377 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2378 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2381 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2383 b0->current_length =
2384 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2385 ip40->length = clib_host_to_net_u16 (b0->current_length);
2386 ip40->checksum = ip4_header_checksum (ip40);
2389 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2390 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2392 ikev2_child_sa_t *c;
2394 vec_foreach (c, sa0->childs)
2395 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2397 ikev2_delete_sa (sa0);
2399 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2401 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2402 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2404 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2405 t->sw_if_index = sw_if_index0;
2406 t->next_index = next0;
2409 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2410 n_left_to_next, bi0, next0);
2413 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2416 vlib_node_increment_counter (vm, ikev2_node.index,
2417 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2418 return frame->n_vectors;
2422 VLIB_REGISTER_NODE (ikev2_node,static) = {
2423 .function = ikev2_node_fn,
2425 .vector_size = sizeof (u32),
2426 .format_trace = format_ikev2_trace,
2427 .type = VLIB_NODE_TYPE_INTERNAL,
2429 .n_errors = ARRAY_LEN(ikev2_error_strings),
2430 .error_strings = ikev2_error_strings,
2432 .n_next_nodes = IKEV2_N_NEXT,
2435 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2436 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2442 static clib_error_t *
2443 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2444 ikev2_transforms_set * ts,
2445 ikev2_sa_proposal_t ** proposals, int is_ike)
2448 ikev2_main_t *km = &ikev2_main;
2449 ikev2_sa_proposal_t *proposal;
2450 vec_add2 (*proposals, proposal, 1);
2451 ikev2_sa_transform_t *td;
2456 vec_foreach (td, km->supported_transforms)
2458 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2459 && td->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC
2460 && td->key_len == ts->crypto_key_size / 8)
2463 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2464 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2465 vec_add (td->attrs, (u8 *) attr, 4);
2466 vec_add1 (proposal->transforms, *td);
2475 r = clib_error_return (0, "Unsupported algorithm");
2481 vec_foreach (td, km->supported_transforms)
2483 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2484 && td->integ_type == IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96)
2486 vec_add1 (proposal->transforms, *td);
2493 r = clib_error_return (0, "Unsupported algorithm");
2501 vec_foreach (td, km->supported_transforms)
2503 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2504 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA1)
2506 vec_add1 (proposal->transforms, *td);
2513 r = clib_error_return (0, "Unsupported algorithm");
2520 vec_foreach (td, km->supported_transforms)
2522 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2524 vec_add1 (proposal->transforms, *td);
2527 sa->dh_group = td->dh_type;
2535 r = clib_error_return (0, "Unsupported algorithm");
2542 vec_foreach (td, km->supported_transforms)
2544 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2546 vec_add1 (proposal->transforms, *td);
2553 r = clib_error_return (0, "Unsupported algorithm");
2562 static ikev2_profile_t *
2563 ikev2_profile_index_by_name (u8 * name)
2565 ikev2_main_t *km = &ikev2_main;
2568 p = mhash_get (&km->profile_index_by_name, name);
2572 return pool_elt_at_index (km->profiles, p[0]);
2577 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2586 b0 = vlib_get_buffer (vm, bi0);
2587 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2588 udp0 = vlib_buffer_get_current (b0);
2589 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2590 ip40 = vlib_buffer_get_current (b0);
2593 ip40->ip_version_and_header_length = 0x45;
2595 ip40->fragment_id = 0;
2596 ip40->flags_and_fragment_offset = 0;
2598 ip40->protocol = IP_PROTOCOL_UDP;
2599 ip40->dst_address.as_u32 = dst->as_u32;
2600 ip40->src_address.as_u32 = src->as_u32;
2601 udp0->dst_port = clib_host_to_net_u16 (500);
2602 udp0->src_port = clib_host_to_net_u16 (500);
2603 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2605 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2606 ip40->length = clib_host_to_net_u16 (b0->current_length);
2607 ip40->checksum = ip4_header_checksum (ip40);
2610 /* send the request */
2611 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2612 to_next = vlib_frame_vector_args (f);
2615 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2620 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2623 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2628 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2629 *ike = vlib_buffer_get_current (b0);
2634 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2636 ikev2_main_t *km = &ikev2_main;
2638 km->pkey = ikev2_load_key_file (file);
2639 if (km->pkey == NULL)
2640 return clib_error_return (0, "load key '%s' failed", file);
2646 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2648 ikev2_main_t *km = &ikev2_main;
2653 if (ikev2_profile_index_by_name (name))
2654 return clib_error_return (0, "policy %v already exists", name);
2656 pool_get (km->profiles, p);
2657 memset (p, 0, sizeof (*p));
2658 p->name = vec_dup (name);
2659 p->responder.sw_if_index = ~0;
2660 uword index = p - km->profiles;
2661 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2665 p = ikev2_profile_index_by_name (name);
2667 return clib_error_return (0, "policy %v does not exists", name);
2670 pool_put (km->profiles, p);
2671 mhash_unset (&km->profile_index_by_name, name, 0);
2677 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2678 u8 * auth_data, u8 data_hex_format)
2683 p = ikev2_profile_index_by_name (name);
2687 r = clib_error_return (0, "unknown profile %v", name);
2690 vec_free (p->auth.data);
2691 p->auth.method = auth_method;
2692 p->auth.data = vec_dup (auth_data);
2693 p->auth.hex = data_hex_format;
2695 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2697 vec_add1 (p->auth.data, 0);
2699 EVP_PKEY_free (p->auth.key);
2700 p->auth.key = ikev2_load_cert_file (auth_data);
2701 if (p->auth.key == NULL)
2702 return clib_error_return (0, "load cert '%s' failed", auth_data);
2709 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2715 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2716 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2718 r = clib_error_return (0, "unsupported identity type %U",
2719 format_ikev2_id_type, id_type);
2723 p = ikev2_profile_index_by_name (name);
2727 r = clib_error_return (0, "unknown profile %v", name);
2733 vec_free (p->loc_id.data);
2734 p->loc_id.type = id_type;
2735 p->loc_id.data = vec_dup (data);
2739 vec_free (p->rem_id.data);
2740 p->rem_id.type = id_type;
2741 p->rem_id.data = vec_dup (data);
2748 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2749 u16 start_port, u16 end_port, ip4_address_t start_addr,
2750 ip4_address_t end_addr, int is_local)
2755 p = ikev2_profile_index_by_name (name);
2759 r = clib_error_return (0, "unknown profile %v", name);
2765 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2766 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2767 p->loc_ts.start_port = start_port;
2768 p->loc_ts.end_port = end_port;
2769 p->loc_ts.protocol_id = protocol_id;
2770 p->loc_ts.ts_type = 7;
2774 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2775 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2776 p->rem_ts.start_port = start_port;
2777 p->rem_ts.end_port = end_port;
2778 p->rem_ts.protocol_id = protocol_id;
2779 p->rem_ts.ts_type = 7;
2787 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
2788 u32 sw_if_index, ip4_address_t ip4)
2793 p = ikev2_profile_index_by_name (name);
2797 r = clib_error_return (0, "unknown profile %v", name);
2801 p->responder.sw_if_index = sw_if_index;
2802 p->responder.ip4 = ip4;
2808 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
2809 ikev2_transform_encr_type_t crypto_alg,
2810 ikev2_transform_integ_type_t integ_alg,
2811 ikev2_transform_dh_type_t dh_type,
2812 u32 crypto_key_size)
2817 p = ikev2_profile_index_by_name (name);
2821 r = clib_error_return (0, "unknown profile %v", name);
2825 p->ike_ts.crypto_alg = crypto_alg;
2826 p->ike_ts.integ_alg = integ_alg;
2827 p->ike_ts.dh_type = dh_type;
2828 p->ike_ts.crypto_key_size = crypto_key_size;
2833 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
2834 ikev2_transform_encr_type_t crypto_alg,
2835 ikev2_transform_integ_type_t integ_alg,
2836 ikev2_transform_dh_type_t dh_type,
2837 u32 crypto_key_size)
2842 p = ikev2_profile_index_by_name (name);
2846 r = clib_error_return (0, "unknown profile %v", name);
2850 p->esp_ts.crypto_alg = crypto_alg;
2851 p->esp_ts.integ_alg = integ_alg;
2852 p->esp_ts.dh_type = dh_type;
2853 p->esp_ts.crypto_key_size = crypto_key_size;
2858 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
2859 u64 lifetime, u32 jitter, u32 handover,
2865 p = ikev2_profile_index_by_name (name);
2869 r = clib_error_return (0, "unknown profile %v", name);
2873 p->lifetime = lifetime;
2874 p->lifetime_jitter = jitter;
2875 p->handover = handover;
2876 p->lifetime_maxdata = maxdata;
2881 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
2885 ip4_main_t *im = &ip4_main;
2886 ikev2_main_t *km = &ikev2_main;
2888 p = ikev2_profile_index_by_name (name);
2892 r = clib_error_return (0, "unknown profile %v", name);
2896 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
2898 r = clib_error_return (0, "responder not set for profile %v", name);
2903 /* Create the Initiator Request */
2907 ip_lookup_main_t *lm = &im->lookup_main;
2909 int len = sizeof (ike_header_t);
2911 /* Get own iface IP */
2913 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
2914 ip_interface_address_t *if_add =
2915 pool_elt_at_index (lm->if_address_pool, if_add_index0);
2916 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
2918 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
2920 /* Prepare the SA and the IKE payload */
2922 memset (&sa, 0, sizeof (ikev2_sa_t));
2923 ikev2_payload_chain_t *chain = 0;
2924 ikev2_payload_new_chain (chain);
2926 /* Build the IKE proposal payload */
2927 ikev2_sa_proposal_t *proposals = 0;
2928 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
2929 proposals[0].proposal_num = 1;
2930 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
2932 /* Add and then cleanup proposal data */
2933 ikev2_payload_add_sa (chain, proposals);
2934 ikev2_sa_free_proposal_vector (&proposals);
2936 sa.is_initiator = 1;
2938 sa.state = IKEV2_STATE_SA_INIT;
2939 ikev2_generate_sa_init_data (&sa);
2940 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
2941 ikev2_payload_add_nonce (chain, sa.i_nonce);
2943 /* Build the child SA proposal */
2944 vec_resize (sa.childs, 1);
2945 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
2946 &sa.childs[0].i_proposals, 0);
2947 sa.childs[0].i_proposals[0].proposal_num = 1;
2948 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
2949 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
2950 sizeof (sa.childs[0].i_proposals[0].spi));
2954 /* Add NAT detection notification messages (mandatory) */
2955 u8 nat_detection_source[8 + 8 + 4 + 2];
2956 u8 *nat_detection_sha1 = vec_new (u8, 20);
2958 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
2959 clib_memcpy (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
2960 tmpspi = clib_host_to_net_u64 (sa.rspi);
2961 clib_memcpy (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
2962 u16 tmpport = clib_host_to_net_u16 (500);
2963 clib_memcpy (&nat_detection_source[8 + 8 + 4], &tmpport,
2965 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
2966 clib_memcpy (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
2967 SHA1 (nat_detection_source, sizeof (nat_detection_source),
2968 nat_detection_sha1);
2969 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2970 nat_detection_sha1);
2971 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
2972 clib_memcpy (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
2973 SHA1 (nat_detection_source, sizeof (nat_detection_source),
2974 nat_detection_sha1);
2975 ikev2_payload_add_notify (chain,
2976 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2977 nat_detection_sha1);
2978 vec_free (nat_detection_sha1);
2980 u8 *sig_hash_algo = vec_new (u8, 8);
2981 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
2982 clib_memcpy (sig_hash_algo, &tmpsig, sizeof (tmpsig));
2983 ikev2_payload_add_notify (chain,
2984 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
2986 vec_free (sig_hash_algo);
2989 /* Buffer update and bolierplate */
2990 len += vec_len (chain->data);
2991 ike0->nextpayload = chain->first_payload_type;
2992 ike0->length = clib_host_to_net_u32 (len);
2993 clib_memcpy (ike0->payload, chain->data, vec_len (chain->data));
2994 ikev2_payload_destroy_chain (chain);
2996 ike0->version = IKE_VERSION_2;
2997 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
2998 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
2999 ike0->ispi = sa.ispi;
3001 /* store whole IKE payload - needed for PSK auth */
3002 vec_free (sa.last_sa_init_req_packet_data);
3003 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3005 /* add data to the SA then add it to the pool */
3006 sa.iaddr.as_u32 = if_ip->as_u32;
3007 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3008 sa.i_id.type = p->loc_id.type;
3009 sa.i_id.data = vec_dup (p->loc_id.data);
3010 sa.i_auth.method = p->auth.method;
3011 sa.i_auth.hex = p->auth.hex;
3012 sa.i_auth.data = vec_dup (p->auth.data);
3013 sa.i_auth.key = vec_dup (p->auth.key);
3014 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3015 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3017 /* add SA to the pool */
3018 ikev2_sa_t *sa0 = 0;
3019 pool_get (km->sais, sa0);
3020 clib_memcpy (sa0, &sa, sizeof (*sa0));
3021 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3023 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3031 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3032 ikev2_child_sa_t * csa)
3034 /* Create the Initiator notification for child SA removal */
3035 ikev2_main_t *km = &ikev2_main;
3040 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3043 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3044 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3045 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3046 vec_resize (sa->del, 1);
3047 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3048 sa->del->spi = csa->i_proposals->spi;
3049 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3050 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3051 len = ikev2_generate_message (sa, ike0, 0);
3053 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3055 /* delete local child SA */
3056 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3057 ikev2_sa_del_child_sa (sa, csa);
3061 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3064 ikev2_main_t *km = &ikev2_main;
3065 ikev2_main_per_thread_data_t *tkm;
3066 ikev2_sa_t *fsa = 0;
3067 ikev2_child_sa_t *fchild = 0;
3069 /* Search for the child SA */
3070 vec_foreach (tkm, km->per_thread_data)
3076 pool_foreach (sa, tkm->sas, ({
3077 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3087 if (!fchild || !fsa)
3089 r = clib_error_return (0, "Child SA not found");
3094 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3101 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3104 ikev2_main_t *km = &ikev2_main;
3105 ikev2_main_per_thread_data_t *tkm;
3106 ikev2_sa_t *fsa = 0;
3107 ikev2_main_per_thread_data_t *ftkm = 0;
3109 /* Search for the IKE SA */
3110 vec_foreach (tkm, km->per_thread_data)
3116 pool_foreach (sa, tkm->sas, ({
3117 if (sa->ispi == ispi)
3129 r = clib_error_return (0, "IKE SA not found");
3134 /* Create the Initiator notification for IKE SA removal */
3140 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3143 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3144 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3145 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3146 vec_resize (fsa->del, 1);
3147 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3148 fsa->del->spi = ispi;
3149 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3150 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3151 len = ikev2_generate_message (fsa, ike0, 0);
3153 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3157 /* delete local SA */
3158 ikev2_child_sa_t *c;
3159 vec_foreach (c, fsa->childs)
3161 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3162 ikev2_sa_del_child_sa (fsa, c);
3164 ikev2_sa_free_all_vec (fsa);
3165 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3168 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3169 pool_put (ftkm->sas, fsa);
3177 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3178 ikev2_child_sa_t * csa)
3180 /* Create the Initiator request for create child SA */
3186 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3189 ike0->version = IKE_VERSION_2;
3190 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3191 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3192 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3193 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3194 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3195 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3197 ikev2_rekey_t *rekey;
3198 vec_add2 (sa->rekey, rekey, 1);
3199 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3202 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3203 rekey->spi = proposals[0].spi;
3204 rekey->ispi = csa->i_proposals->spi;
3205 len = ikev2_generate_message (sa, ike0, proposals);
3206 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3207 vec_free (proposals);
3211 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3214 ikev2_main_t *km = &ikev2_main;
3215 ikev2_main_per_thread_data_t *tkm;
3216 ikev2_sa_t *fsa = 0;
3217 ikev2_child_sa_t *fchild = 0;
3219 /* Search for the child SA */
3220 vec_foreach (tkm, km->per_thread_data)
3226 pool_foreach (sa, tkm->sas, ({
3227 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3237 if (!fchild || !fsa)
3239 r = clib_error_return (0, "Child SA not found");
3244 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3251 ikev2_init (vlib_main_t * vm)
3253 ikev2_main_t *km = &ikev2_main;
3254 clib_error_t *error;
3255 vlib_thread_main_t *tm = vlib_get_thread_main ();
3258 memset (km, 0, sizeof (ikev2_main_t));
3259 km->vnet_main = vnet_get_main ();
3262 ikev2_crypto_init (km);
3264 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3266 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3267 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3269 km->per_thread_data[thread_id].sa_by_rspi =
3270 hash_create (0, sizeof (uword));
3273 km->sa_by_ispi = hash_create (0, sizeof (uword));
3276 if ((error = vlib_call_init_function (vm, ikev2_cli_init)))
3279 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3286 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3288 ikev2_main_t *km = &ikev2_main;
3289 vlib_main_t *vm = km->vlib_main;
3290 f64 now = vlib_time_now (vm);
3293 if (sa->is_initiator && sa->profile && csa->time_to_expiration
3294 && now > csa->time_to_expiration)
3296 if (!csa->is_expired || csa->rekey_retries > 0)
3298 ikev2_rekey_child_sa_internal (vm, sa, csa);
3299 csa->time_to_expiration = now + sa->profile->handover;
3300 csa->is_expired = 1;
3301 if (csa->rekey_retries == 0)
3303 csa->rekey_retries = 5;
3305 else if (csa->rekey_retries > 0)
3307 csa->rekey_retries--;
3308 clib_warning ("Rekeing Child SA 0x%x, retries left %d",
3309 csa->i_proposals->spi, csa->rekey_retries);
3310 if (csa->rekey_retries == 0)
3312 csa->rekey_retries = -1;
3319 csa->time_to_expiration = 0;
3320 ikev2_delete_child_sa_internal (vm, sa, csa);
3329 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3331 ikev2_main_t *km = &ikev2_main;
3332 vlib_main_t *vm = km->vlib_main;
3333 ikev2_main_per_thread_data_t *tkm;
3334 ikev2_sa_t *fsa = 0;
3335 ikev2_child_sa_t *fchild = 0;
3336 f64 now = vlib_time_now (vm);
3338 /* Search for the SA and child SA */
3339 vec_foreach (tkm, km->per_thread_data)
3345 pool_foreach (sa, tkm->sas, ({
3346 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3356 if (fchild && fsa && fsa->profile && fsa->profile->lifetime_maxdata)
3358 if (!fchild->is_expired
3359 && ipsec_sa->total_data_size > fsa->profile->lifetime_maxdata)
3361 fchild->time_to_expiration = now;
3366 static vlib_node_registration_t ikev2_mngr_process_node;
3369 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3372 ikev2_main_t *km = &ikev2_main;
3373 ipsec_main_t *im = &ipsec_main;
3378 vlib_process_wait_for_event_or_clock (vm, 1);
3379 vlib_process_get_events (vm, NULL);
3381 /* process ike child sas */
3382 ikev2_main_per_thread_data_t *tkm;
3383 vec_foreach (tkm, km->per_thread_data)
3387 pool_foreach (sa, tkm->sas, ({
3388 ikev2_child_sa_t *c;
3389 vec_foreach (c, sa->childs)
3391 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3397 /* process ipsec sas */
3400 pool_foreach (sa, im->sad, ({
3401 ikev2_mngr_process_ipsec_sa(sa);
3407 vlib_process_wait_for_event_or_clock (vm, 5);
3408 vlib_process_get_events (vm, NULL);
3417 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3418 .function = ikev2_mngr_process_fn,
3419 .type = VLIB_NODE_TYPE_PROCESS,
3421 "ikev2-manager-process",
3427 * fd.io coding-style-patch-verification: ON
3430 * eval: (c-set-style "gnu")