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 <vlib/unix/plugin.h>
18 #include <vlibmemory/api.h>
19 #include <vpp/app/version.h>
20 #include <vnet/vnet.h>
21 #include <vnet/pg/pg.h>
22 #include <vppinfra/error.h>
23 #include <vppinfra/random.h>
24 #include <vnet/udp/udp.h>
25 #include <vnet/ipsec/ipsec.h>
26 #include <vnet/ipsec/ipsec_tun.h>
27 #include <vnet/ipip/ipip.h>
28 #include <plugins/ikev2/ikev2.h>
29 #include <plugins/ikev2/ikev2_priv.h>
30 #include <openssl/sha.h>
31 #include <vnet/ipsec/ipsec_punt.h>
33 #define IKEV2_LIVENESS_RETRIES 3
34 #define IKEV2_LIVENESS_PERIOD_CHECK 30
36 ikev2_main_t ikev2_main;
38 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
40 ikev2_child_sa_t * child);
42 #define ikev2_set_state(sa, v) do { \
44 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
54 format_ikev2_trace (u8 * s, va_list * args)
56 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
57 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
58 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
60 s = format (s, "ikev2: sw_if_index %d, next index %d",
61 t->sw_if_index, t->next_index);
65 static vlib_node_registration_t ikev2_node;
67 #define foreach_ikev2_error \
68 _(PROCESSED, "IKEv2 packets processed") \
69 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
70 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
71 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
72 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
73 _(NOT_IKEV2, "Non IKEv2 packets received")
77 #define _(sym,str) IKEV2_ERROR_##sym,
83 static char *ikev2_error_strings[] = {
84 #define _(sym,string) string,
91 IKEV2_NEXT_IP4_LOOKUP,
92 IKEV2_NEXT_ERROR_DROP,
96 typedef u32 ikev2_non_esp_marker;
98 static_always_inline u16
99 ikev2_get_port (ikev2_sa_t * sa)
101 return sa->natt ? IKEV2_PORT_NATT : IKEV2_PORT;
104 static_always_inline int
105 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
107 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
108 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
109 return len + sizeof (ikev2_non_esp_marker);
112 static ikev2_sa_transform_t *
113 ikev2_find_transform_data (ikev2_sa_transform_t * t)
115 ikev2_main_t *km = &ikev2_main;
116 ikev2_sa_transform_t *td;
118 vec_foreach (td, km->supported_transforms)
120 if (td->type != t->type)
123 if (td->transform_id != t->transform_id)
126 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
128 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
129 || t->attrs[1] != 14)
132 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
140 static ikev2_sa_proposal_t *
141 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
142 ikev2_protocol_id_t prot_id)
144 ikev2_sa_proposal_t *rv = 0;
145 ikev2_sa_proposal_t *proposal;
146 ikev2_sa_transform_t *transform, *new_t;
147 u8 mandatory_bitmap, optional_bitmap;
149 if (prot_id == IKEV2_PROTOCOL_IKE)
151 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
152 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
153 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
154 optional_bitmap = mandatory_bitmap;
156 else if (prot_id == IKEV2_PROTOCOL_ESP)
158 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
159 (1 << IKEV2_TRANSFORM_TYPE_ESN);
160 optional_bitmap = mandatory_bitmap |
161 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
163 else if (prot_id == IKEV2_PROTOCOL_AH)
165 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
166 (1 << IKEV2_TRANSFORM_TYPE_ESN);
167 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
172 vec_add2 (rv, proposal, 1);
174 vec_foreach (proposal, proposals)
177 if (proposal->protocol_id != prot_id)
180 vec_foreach (transform, proposal->transforms)
182 if ((1 << transform->type) & bitmap)
185 if (ikev2_find_transform_data (transform))
187 bitmap |= 1 << transform->type;
188 vec_add2 (rv->transforms, new_t, 1);
189 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
190 new_t->attrs = vec_dup (transform->attrs);
194 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
195 (bitmap & ~optional_bitmap) == 0)
197 rv->proposal_num = proposal->proposal_num;
198 rv->protocol_id = proposal->protocol_id;
199 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
204 vec_free (rv->transforms);
213 ikev2_sa_transform_t *
214 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
215 ikev2_transform_type_t type)
217 ikev2_sa_transform_t *t;
222 vec_foreach (t, p->transforms)
225 return ikev2_find_transform_data (t);
231 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
235 vec_foreach (c, sa->childs)
237 ikev2_sa_proposal_t *proposal =
238 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
239 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
247 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
249 ikev2_sa_proposal_t *p;
250 ikev2_sa_transform_t *t;
257 vec_foreach (t, p->transforms)
261 vec_free (p->transforms);
267 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
269 ikev2_sa_free_proposal_vector (&c->r_proposals);
270 ikev2_sa_free_proposal_vector (&c->i_proposals);
280 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
283 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
289 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
291 ikev2_sa_free_child_sa (child);
292 vec_del1 (sa->childs, child - sa->childs);
296 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
298 vec_free (sa->i_nonce);
299 vec_free (sa->i_dh_data);
300 vec_free (sa->dh_shared_key);
301 vec_free (sa->dh_private_key);
303 ikev2_sa_free_proposal_vector (&sa->r_proposals);
304 ikev2_sa_free_proposal_vector (&sa->i_proposals);
307 vec_free (sa->sk_ai);
308 vec_free (sa->sk_ar);
309 vec_free (sa->sk_ei);
310 vec_free (sa->sk_er);
311 vec_free (sa->sk_pi);
312 vec_free (sa->sk_pr);
314 vec_free (sa->i_id.data);
315 vec_free (sa->i_auth.data);
316 vec_free (sa->r_id.data);
317 vec_free (sa->r_auth.data);
319 EVP_PKEY_free (sa->r_auth.key);
323 ikev2_sa_free_all_child_sa (&sa->childs);
327 ikev2_delete_sa (ikev2_sa_t * sa)
329 ikev2_main_t *km = &ikev2_main;
330 u32 thread_index = vlib_get_thread_index ();
333 ikev2_sa_free_all_vec (sa);
335 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
338 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
339 pool_put (km->per_thread_data[thread_index].sas, sa);
344 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
346 ikev2_sa_transform_t *t = 0, *t2;
347 ikev2_main_t *km = &ikev2_main;
349 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
354 /* check if received DH group is on our list of supported groups */
355 vec_foreach (t2, km->supported_transforms)
357 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
366 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
370 if (sa->is_initiator)
373 RAND_bytes ((u8 *) & sa->ispi, 8);
376 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
377 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
382 RAND_bytes ((u8 *) & sa->rspi, 8);
385 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
386 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
389 /* generate dh keys */
390 ikev2_generate_dh (sa, t);
395 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
397 ikev2_sa_transform_t *t = 0, *t2;
398 ikev2_main_t *km = &ikev2_main;
400 /*move some data to the new SA */
401 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
402 sa->i_nonce = _(sai->i_nonce);
403 sa->i_dh_data = _(sai->i_dh_data);
404 sa->dh_private_key = _(sai->dh_private_key);
405 sa->iaddr.as_u32 = sai->iaddr.as_u32;
406 sa->raddr.as_u32 = sai->raddr.as_u32;
407 sa->is_initiator = sai->is_initiator;
408 sa->i_id.type = sai->i_id.type;
409 sa->profile_index = sai->profile_index;
410 sa->tun_itf = sai->tun_itf;
411 sa->is_tun_itf_set = sai->is_tun_itf_set;
412 sa->i_id.data = _(sai->i_id.data);
413 sa->i_auth.method = sai->i_auth.method;
414 sa->i_auth.hex = sai->i_auth.hex;
415 sa->i_auth.data = _(sai->i_auth.data);
416 sa->i_auth.key = _(sai->i_auth.key);
417 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
418 sa->childs = _(sai->childs);
419 sa->udp_encap = sai->udp_encap;
420 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
421 sa->dst_port = sai->dst_port;
422 sa->sw_if_index = sai->sw_if_index;
426 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
431 /* check if received DH group is on our list of supported groups */
432 vec_foreach (t2, km->supported_transforms)
434 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
443 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
448 /* generate dh keys */
449 ikev2_complete_dh (sa, t);
454 ikev2_calc_keys (ikev2_sa_t * sa)
457 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
460 u16 integ_key_len = 0;
461 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
463 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
465 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
467 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
470 integ_key_len = tr_integ->key_len;
472 vec_append (s, sa->i_nonce);
473 vec_append (s, sa->r_nonce);
474 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
476 /* Calculate S = Ni | Nr | SPIi | SPIr */
478 vec_add2 (s, tmp, 2 * sizeof (*spi));
480 spi[0] = clib_host_to_net_u64 (sa->ispi);
481 spi[1] = clib_host_to_net_u64 (sa->rspi);
483 /* calculate PRFplus */
485 int len = tr_prf->key_trunc + /* SK_d */
486 integ_key_len * 2 + /* SK_ai, SK_ar */
487 tr_encr->key_len * 2 + /* SK_ei, SK_er */
488 tr_prf->key_len * 2; /* SK_pi, SK_pr */
490 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
497 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
498 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
499 pos += tr_prf->key_trunc;
504 sa->sk_ai = vec_new (u8, integ_key_len);
505 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
506 pos += integ_key_len;
509 sa->sk_ar = vec_new (u8, integ_key_len);
510 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
511 pos += integ_key_len;
515 sa->sk_ei = vec_new (u8, tr_encr->key_len);
516 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
517 pos += tr_encr->key_len;
520 sa->sk_er = vec_new (u8, tr_encr->key_len);
521 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
522 pos += tr_encr->key_len;
525 sa->sk_pi = vec_new (u8, tr_prf->key_len);
526 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
527 pos += tr_prf->key_len;
530 sa->sk_pr = vec_new (u8, tr_prf->key_len);
531 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
532 pos += tr_prf->key_len;
538 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
541 u16 integ_key_len = 0;
544 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
546 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
548 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
550 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
553 integ_key_len = ctr_integ->key_len;
555 salt_len = sizeof (u32);
557 vec_append (s, sa->i_nonce);
558 vec_append (s, sa->r_nonce);
559 /* calculate PRFplus */
561 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
563 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
568 child->sk_ei = vec_new (u8, ctr_encr->key_len);
569 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
570 pos += ctr_encr->key_len;
575 child->sk_ai = vec_new (u8, ctr_integ->key_len);
576 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
577 pos += ctr_integ->key_len;
581 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
586 child->sk_er = vec_new (u8, ctr_encr->key_len);
587 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
588 pos += ctr_encr->key_len;
593 child->sk_ar = vec_new (u8, integ_key_len);
594 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
595 pos += integ_key_len;
599 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
608 static_always_inline u8 *
609 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, u32 ip, u16 port)
611 /* ispi, rspi, ip, port */
612 u8 buf[8 + 8 + 4 + 2];
613 u8 *res = vec_new (u8, 20);
615 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
616 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
617 clib_memcpy_fast (&buf[8 + 8], &ip, sizeof (ip));
618 clib_memcpy_fast (&buf[8 + 8 + 4], &port, sizeof (port));
619 SHA1 (buf, sizeof (buf), res);
624 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
625 ike_header_t * ike, udp_header_t * udp)
628 u32 len = clib_net_to_host_u32 (ike->length);
629 u8 payload = ike->nextpayload;
631 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
633 clib_net_to_host_u64 (ike->ispi),
634 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
636 sa->ispi = clib_net_to_host_u64 (ike->ispi);
638 /* store whole IKE payload - needed for PSK auth */
639 vec_free (sa->last_sa_init_req_packet_data);
640 vec_add (sa->last_sa_init_req_packet_data, ike, len);
642 while (p < len && payload != IKEV2_PAYLOAD_NONE)
644 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
645 u32 plen = clib_net_to_host_u16 (ikep->length);
647 if (plen < sizeof (ike_payload_header_t))
650 if (payload == IKEV2_PAYLOAD_SA)
652 ikev2_sa_free_proposal_vector (&sa->i_proposals);
653 sa->i_proposals = ikev2_parse_sa_payload (ikep);
655 else if (payload == IKEV2_PAYLOAD_KE)
657 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
658 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
659 vec_free (sa->i_dh_data);
660 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
662 else if (payload == IKEV2_PAYLOAD_NONCE)
664 vec_free (sa->i_nonce);
665 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
667 else if (payload == IKEV2_PAYLOAD_NOTIFY)
669 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
670 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
673 ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0,
674 clib_net_to_host_u32 (sa->
677 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
680 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
681 " behind NAT", sa->ispi);
685 else if (n->msg_type ==
686 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
689 ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0,
690 clib_net_to_host_u32 (sa->
693 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
696 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
697 " (self) behind NAT", sa->ispi);
703 else if (payload == IKEV2_PAYLOAD_VENDOR)
705 ikev2_parse_vendor_payload (ikep);
709 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
711 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
713 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
714 sa->unsupported_cp = payload;
719 payload = ikep->nextpayload;
723 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
727 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
728 ike_header_t * ike, udp_header_t * udp)
731 u32 len = clib_net_to_host_u32 (ike->length);
732 u8 payload = ike->nextpayload;
734 sa->ispi = clib_net_to_host_u64 (ike->ispi);
735 sa->rspi = clib_net_to_host_u64 (ike->rspi);
737 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
738 "from %d.%d.%d.%d", sa->ispi, sa->rspi,
741 /* store whole IKE payload - needed for PSK auth */
742 vec_free (sa->last_sa_init_res_packet_data);
743 vec_add (sa->last_sa_init_res_packet_data, ike, len);
745 while (p < len && payload != IKEV2_PAYLOAD_NONE)
747 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
748 u32 plen = clib_net_to_host_u16 (ikep->length);
750 if (plen < sizeof (ike_payload_header_t))
753 if (payload == IKEV2_PAYLOAD_SA)
755 ikev2_sa_free_proposal_vector (&sa->r_proposals);
756 sa->r_proposals = ikev2_parse_sa_payload (ikep);
759 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
761 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
764 else if (payload == IKEV2_PAYLOAD_KE)
766 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
767 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
768 vec_free (sa->r_dh_data);
769 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
771 else if (payload == IKEV2_PAYLOAD_NONCE)
773 vec_free (sa->r_nonce);
774 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
776 else if (payload == IKEV2_PAYLOAD_NOTIFY)
778 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
779 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
781 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi,
786 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
788 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
789 " behind NAT, unsupported", sa->ispi);
793 else if (n->msg_type ==
794 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
796 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi,
800 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
803 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
804 " (self) behind NAT", sa->ispi);
810 else if (payload == IKEV2_PAYLOAD_VENDOR)
812 ikev2_parse_vendor_payload (ikep);
816 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
818 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
820 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
821 sa->unsupported_cp = payload;
826 payload = ikep->nextpayload;
832 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
837 u32 len = clib_net_to_host_u32 (ike->length);
838 ike_payload_header_t *ikep = 0;
840 ikev2_sa_transform_t *tr_integ;
842 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
844 if (!sa->sk_ar || !sa->sk_ai)
848 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
850 ikep = (ike_payload_header_t *) & ike->payload[p];
851 plen = clib_net_to_host_u16 (ikep->length);
853 if (plen < sizeof (*ikep))
856 if (*payload == IKEV2_PAYLOAD_SK)
858 last_payload = *payload;
862 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
864 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
866 sa->unsupported_cp = *payload;
871 *payload = ikep->nextpayload;
875 if (last_payload != IKEV2_PAYLOAD_SK)
877 ikev2_elog_error ("Last payload must be SK");
882 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
883 (u8 *) ike, len - tr_integ->key_trunc);
885 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
887 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
889 ikev2_elog_error ("message integrity check failed");
895 return ikev2_decrypt_data (sa, ikep->payload, plen);
899 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
901 ikev2_main_t *km = &ikev2_main;
905 u32 thread_index = vlib_get_thread_index ();
907 if (!sa->initial_contact)
910 /* find old IKE SAs with the same authenticated identity */
912 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
913 if (tmp->i_id.type != sa->i_id.type ||
914 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
915 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
918 if (sa->rspi != tmp->rspi)
919 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
923 for (i = 0; i < vec_len (delete); i++)
926 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
928 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
930 ikev2_delete_sa (tmp);
934 sa->initial_contact = 0;
938 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
940 ikev2_child_sa_t *first_child_sa;
942 u8 payload = ike->nextpayload;
944 ike_payload_header_t *ikep;
947 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
948 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
949 clib_host_to_net_u64 (ike->rspi),
950 sa->is_initiator ? sa->raddr.as_u32 : sa->
953 ikev2_calc_keys (sa);
955 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
959 if (sa->unsupported_cp)
960 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
961 goto cleanup_and_exit;
964 /* select or create 1st child SA */
965 if (sa->is_initiator)
967 first_child_sa = &sa->childs[0];
971 ikev2_sa_free_all_child_sa (&sa->childs);
972 vec_add2 (sa->childs, first_child_sa, 1);
976 /* process encrypted payload */
978 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
980 ikep = (ike_payload_header_t *) & plaintext[p];
981 plen = clib_net_to_host_u16 (ikep->length);
983 if (plen < sizeof (ike_payload_header_t))
984 goto cleanup_and_exit;
986 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
988 if (sa->is_initiator)
990 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
991 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
995 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
996 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
999 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1001 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1003 sa->i_id.type = id->id_type;
1004 vec_free (sa->i_id.data);
1005 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
1007 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1009 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1011 sa->r_id.type = id->id_type;
1012 vec_free (sa->r_id.data);
1013 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
1015 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1017 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
1019 if (sa->is_initiator)
1021 sa->r_auth.method = a->auth_method;
1022 vec_free (sa->r_auth.data);
1023 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
1027 sa->i_auth.method = a->auth_method;
1028 vec_free (sa->i_auth.data);
1029 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
1032 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1034 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1035 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1037 sa->initial_contact = 1;
1041 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1043 ikev2_parse_vendor_payload (ikep);
1045 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1047 vec_free (first_child_sa->tsi);
1048 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
1050 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1052 vec_free (first_child_sa->tsr);
1053 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
1057 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1060 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1062 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1063 sa->unsupported_cp = payload;
1068 payload = ikep->nextpayload;
1073 vec_free (plaintext);
1077 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
1081 u8 payload = ike->nextpayload;
1083 ike_payload_header_t *ikep;
1086 sa->liveness_retries = 0;
1087 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1088 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1089 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
1091 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1094 goto cleanup_and_exit;
1096 /* process encrypted payload */
1098 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1100 ikep = (ike_payload_header_t *) & plaintext[p];
1101 plen = clib_net_to_host_u16 (ikep->length);
1103 if (plen < sizeof (ike_payload_header_t))
1104 goto cleanup_and_exit;
1106 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1108 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1109 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1110 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1113 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1115 sa->del = ikev2_parse_delete_payload (ikep);
1117 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1119 ikev2_parse_vendor_payload (ikep);
1123 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1125 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1127 sa->unsupported_cp = payload;
1132 payload = ikep->nextpayload;
1137 vec_free (plaintext);
1141 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1145 u8 payload = ike->nextpayload;
1148 u8 nonce[IKEV2_NONCE_SIZE];
1150 ike_payload_header_t *ikep;
1152 ikev2_notify_t *n = 0;
1153 ikev2_ts_t *tsi = 0;
1154 ikev2_ts_t *tsr = 0;
1155 ikev2_sa_proposal_t *proposal = 0;
1156 ikev2_child_sa_t *child_sa;
1158 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1159 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1160 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1162 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1165 goto cleanup_and_exit;
1167 /* process encrypted payload */
1169 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1171 ikep = (ike_payload_header_t *) & plaintext[p];
1172 plen = clib_net_to_host_u16 (ikep->length);
1174 if (plen < sizeof (ike_payload_header_t))
1175 goto cleanup_and_exit;
1177 else if (payload == IKEV2_PAYLOAD_SA)
1179 proposal = ikev2_parse_sa_payload (ikep);
1181 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1183 n = ikev2_parse_notify_payload (ikep);
1184 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1189 else if (payload == IKEV2_PAYLOAD_DELETE)
1191 sa->del = ikev2_parse_delete_payload (ikep);
1193 else if (payload == IKEV2_PAYLOAD_VENDOR)
1195 ikev2_parse_vendor_payload (ikep);
1197 else if (payload == IKEV2_PAYLOAD_NONCE)
1199 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1201 else if (payload == IKEV2_PAYLOAD_TSI)
1203 tsi = ikev2_parse_ts_payload (ikep);
1205 else if (payload == IKEV2_PAYLOAD_TSR)
1207 tsr = ikev2_parse_ts_payload (ikep);
1211 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1213 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1215 sa->unsupported_cp = payload;
1216 goto cleanup_and_exit;
1220 payload = ikep->nextpayload;
1224 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1226 ikev2_rekey_t *rekey = &sa->rekey[0];
1227 rekey->protocol_id = proposal->protocol_id;
1229 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1230 rekey->i_proposal->spi = rekey->spi;
1231 rekey->r_proposal = proposal;
1235 vec_free (sa->r_nonce);
1236 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1237 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1240 child_sa->rekey_retries = 0;
1245 ikev2_rekey_t *rekey;
1246 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1249 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1251 goto cleanup_and_exit;
1253 vec_add2 (sa->rekey, rekey, 1);
1254 rekey->protocol_id = n->protocol_id;
1255 rekey->spi = n->spi;
1256 rekey->i_proposal = proposal;
1258 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1262 vec_free (sa->i_nonce);
1263 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1264 /* generate new Nr */
1265 vec_free (sa->r_nonce);
1266 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1267 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1271 vec_free (plaintext);
1276 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1284 ikev2_sa_transform_t *tr_prf;
1287 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1293 nonce = sa->i_nonce;
1294 packet_data = sa->last_sa_init_res_packet_data;
1300 nonce = sa->r_nonce;
1301 packet_data = sa->last_sa_init_req_packet_data;
1304 data = vec_new (u8, 4);
1306 vec_append (data, id->data);
1308 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1309 vec_append (authmsg, packet_data);
1310 vec_append (authmsg, nonce);
1311 vec_append (authmsg, id_hash);
1319 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1321 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1322 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1323 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1324 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1331 ikev2_sa_match_ts (ikev2_sa_t * sa)
1333 ikev2_main_t *km = &ikev2_main;
1335 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1339 pool_foreach (p, km->profiles, ({
1341 if (sa->is_initiator)
1355 if (p->rem_id.type != id->type ||
1356 vec_len(p->rem_id.data) != vec_len(id->data) ||
1357 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1360 sa->profile_index = p - km->profiles;
1362 vec_foreach(ts, sa->childs[0].tsi)
1364 if (ikev2_ts_cmp(p_tsi, ts))
1366 vec_add1 (tsi, ts[0]);
1371 vec_foreach(ts, sa->childs[0].tsr)
1373 if (ikev2_ts_cmp(p_tsr, ts))
1375 vec_add1 (tsr, ts[0]);
1386 vec_free (sa->childs[0].tsi);
1387 vec_free (sa->childs[0].tsr);
1388 sa->childs[0].tsi = tsi;
1389 sa->childs[0].tsr = tsr;
1395 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1400 ikev2_sa_auth (ikev2_sa_t * sa)
1402 ikev2_main_t *km = &ikev2_main;
1403 ikev2_profile_t *p, *sel_p = 0;
1404 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1405 ikev2_sa_transform_t *tr_prf;
1408 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1410 /* only shared key and rsa signature */
1411 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1412 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1414 ikev2_elog_uint (IKEV2_LOG_ERROR,
1415 "unsupported authentication method %u",
1417 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1421 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1422 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1425 ikev2_auth_t *sa_auth;
1427 if (sa->is_initiator)
1430 sa_auth = &sa->r_auth;
1435 sa_auth = &sa->i_auth;
1439 pool_foreach (p, km->profiles, ({
1442 if (p->rem_id.type != sa_id->type ||
1443 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1444 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1447 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1449 if (!p->auth.data ||
1450 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1453 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1454 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1456 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1458 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1465 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1467 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1470 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1472 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1485 sa->udp_encap = sel_p->udp_encap;
1486 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1490 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1492 if (!sa->is_initiator)
1494 vec_free (sa->r_id.data);
1495 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1496 sa->r_id.type = sel_p->loc_id.type;
1498 /* generate our auth data */
1499 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1500 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1502 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1503 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1505 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1507 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1508 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1512 /* select transforms for 1st child sa */
1513 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1514 sa->childs[0].r_proposals =
1515 ikev2_select_proposal (sa->childs[0].i_proposals,
1516 IKEV2_PROTOCOL_ESP);
1518 if (~0 != sel_p->tun_itf)
1520 sa->is_tun_itf_set = 1;
1521 sa->tun_itf = sel_p->tun_itf;
1527 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1528 "profile found! ispi %lx", sa->ispi);
1529 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1537 ikev2_sa_auth_init (ikev2_sa_t * sa)
1539 ikev2_main_t *km = &ikev2_main;
1540 u8 *authmsg, *key_pad, *psk = 0;
1541 ikev2_sa_transform_t *tr_prf;
1544 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1546 /* only shared key and rsa signature */
1547 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1548 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1550 ikev2_elog_uint (IKEV2_LOG_ERROR,
1551 "unsupported authentication method %u",
1553 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1557 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1558 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1559 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1561 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1563 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1564 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1566 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1568 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1569 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1578 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1580 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1584 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1586 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1596 ipsec_sa_flags_t flags;
1599 ipsec_crypto_alg_t encr_type;
1600 ipsec_integ_alg_t integ_type;
1601 ip46_address_t local_ip;
1602 ip46_address_t remote_ip;
1603 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1605 u32 old_remote_sa_id;
1606 u16 ipsec_over_udp_port;
1609 } ikev2_add_ipsec_tunnel_args_t;
1612 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1614 ikev2_main_t *km = &ikev2_main;
1618 if (~0 == a->sw_if_index)
1620 /* no tunnel associated with the SA/profile - create a new one */
1621 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1622 &a->local_ip, &a->remote_ip, 0,
1623 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1624 TUNNEL_MODE_P2P, &sw_if_index);
1626 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1628 if (hash_get (km->sw_if_indices, sw_if_index))
1629 /* interface is managed by IKE; proceed with updating SAs */
1632 hash_set1 (km->sw_if_indices, sw_if_index);
1636 sw_if_index = a->sw_if_index;
1637 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1642 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1643 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1644 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1649 vec_add1 (sas_in, a->remote_sa_id);
1652 ipsec_tun_protect_del (sw_if_index, NULL);
1654 /* replace local SA immediately */
1655 ipsec_sa_unlock_id (a->local_sa_id);
1657 /* keep the old sa */
1658 vec_add1 (sas_in, a->old_remote_sa_id);
1661 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1663 IPSEC_PROTOCOL_ESP, a->encr_type,
1664 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1665 a->flags, 0, a->salt_local, &a->local_ip,
1666 &a->remote_ip, NULL, a->src_port, a->dst_port);
1667 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1668 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1669 a->integ_type, &a->rem_ikey,
1670 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1671 a->salt_remote, &a->remote_ip,
1672 &a->local_ip, NULL, a->ipsec_over_udp_port,
1673 a->ipsec_over_udp_port);
1675 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1679 ikev2_create_tunnel_interface (vlib_main_t * vm,
1682 ikev2_child_sa_t * child, u32 sa_index,
1683 u32 child_index, u8 is_rekey)
1685 ikev2_main_t *km = &ikev2_main;
1686 ipsec_crypto_alg_t encr_type;
1687 ipsec_integ_alg_t integ_type;
1688 ikev2_profile_t *p = 0;
1689 ikev2_sa_transform_t *tr;
1690 ikev2_sa_proposal_t *proposals;
1692 ikev2_add_ipsec_tunnel_args_t a;
1694 clib_memset (&a, 0, sizeof (a));
1696 if (!child->r_proposals)
1698 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1702 if (sa->is_initiator)
1704 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1705 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1706 proposals = child->i_proposals;
1707 a.local_spi = child->r_proposals[0].spi;
1708 a.remote_spi = child->i_proposals[0].spi;
1712 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1713 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1714 proposals = child->r_proposals;
1715 a.local_spi = child->i_proposals[0].spi;
1716 a.remote_spi = child->r_proposals[0].spi;
1719 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1722 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1723 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1726 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1727 a.is_rekey = is_rekey;
1729 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1730 if (tr && tr->esn_type)
1731 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1733 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1736 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1738 switch (tr->key_len)
1741 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1744 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1747 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1750 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1755 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1758 switch (tr->key_len)
1761 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1764 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1767 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1770 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1778 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1784 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1787 a.encr_type = encr_type;
1791 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1794 switch (tr->integ_type)
1796 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1797 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1799 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1800 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1802 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1803 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1805 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1806 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1809 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1815 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1821 integ_type = IPSEC_INTEG_ALG_NONE;
1824 a.integ_type = integ_type;
1825 ikev2_calc_child_keys (sa, child);
1827 if (sa->is_initiator)
1829 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1830 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1831 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1832 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1835 a.salt_remote = child->salt_er;
1836 a.salt_local = child->salt_ei;
1838 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
1842 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1843 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1844 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1845 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1848 a.salt_remote = child->salt_ei;
1849 a.salt_local = child->salt_er;
1851 a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port;
1852 a.src_port = sa->ipsec_over_udp_port;
1855 if (sa->is_initiator && sa->profile_index != ~0)
1856 p = pool_elt_at_index (km->profiles, sa->profile_index);
1858 if (p && p->lifetime)
1860 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
1861 if (p->lifetime_jitter)
1863 // This is not much better than rand(3), which Coverity warns
1864 // is unsuitable for security applications; random_u32 is
1865 // however fast. If this perturbance to the expiration time
1866 // needs to use a better RNG then we may need to use something
1867 // like /dev/urandom which has significant overhead.
1868 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
1869 rnd = random_u32 (&rnd);
1871 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1875 if (thread_index & 0xffffffc0)
1876 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1878 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1879 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1881 child->local_sa_id =
1883 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1885 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
1890 /* create a new remote SA ID to keep the old SA for a bit longer
1891 * so the peer has some time to swap their SAs */
1893 /* use most significat bit of child index part in id */
1895 if (sa->current_remote_id_mask)
1897 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
1898 sa->current_remote_id_mask = 0;
1902 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
1903 sa->current_remote_id_mask = mask;
1904 remote_sa_id |= mask;
1906 sa->old_id_expiration = 3.0;
1907 sa->old_remote_id_present = 1;
1910 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
1912 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1913 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
1915 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1916 (u8 *) & a, sizeof (a));
1922 ip46_address_t local_ip;
1923 ip46_address_t remote_ip;
1927 } ikev2_del_ipsec_tunnel_args_t;
1929 static_always_inline u32
1930 ikev2_flip_alternate_sa_bit (u32 id)
1939 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1941 ikev2_main_t *km = &ikev2_main;
1942 ipip_tunnel_t *ipip = NULL;
1945 if (~0 == a->sw_if_index)
1948 ipip_tunnel_key_t key = {
1950 .dst = a->remote_ip,
1951 .transport = IPIP_TRANSPORT_IP4,
1956 ipip = ipip_tunnel_db_find (&key);
1960 sw_if_index = ipip->sw_if_index;
1961 hash_unset (km->sw_if_indices, ipip->sw_if_index);
1968 sw_if_index = a->sw_if_index;
1969 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
1972 if (~0 != sw_if_index)
1973 ipsec_tun_protect_del (sw_if_index, NULL);
1975 ipsec_sa_unlock_id (a->remote_sa_id);
1976 ipsec_sa_unlock_id (a->local_sa_id);
1977 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
1980 ipip_del_tunnel (ipip->sw_if_index);
1984 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1985 ikev2_child_sa_t * child)
1987 ikev2_del_ipsec_tunnel_args_t a;
1989 clib_memset (&a, 0, sizeof (a));
1991 if (sa->is_initiator)
1993 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1994 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1998 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1999 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
2002 a.remote_sa_id = child->remote_sa_id;
2003 a.local_sa_id = child->local_sa_id;
2004 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2006 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2012 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user,
2016 ike_payload_header_t *ph;
2020 ikev2_sa_transform_t *tr_encr, *tr_integ;
2022 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2024 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2026 ikev2_payload_chain_t *chain = 0;
2027 ikev2_payload_new_chain (chain);
2029 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2031 if (sa->r_proposals == 0)
2033 ikev2_payload_add_notify (chain,
2034 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2035 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2037 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2039 u8 *data = vec_new (u8, 2);
2040 ikev2_sa_transform_t *tr_dh;
2042 ikev2_sa_get_td_for_type (sa->r_proposals,
2043 IKEV2_TRANSFORM_TYPE_DH);
2044 ASSERT (tr_dh && tr_dh->dh_type);
2046 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2047 data[1] = (tr_dh->dh_type) & 0xff;
2049 ikev2_payload_add_notify (chain,
2050 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2053 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2055 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2057 u8 *data = vec_new (u8, 1);
2059 data[0] = sa->unsupported_cp;
2060 ikev2_payload_add_notify (chain,
2061 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2069 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2070 ikev2_payload_add_sa (chain, sa->r_proposals);
2071 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2072 ikev2_payload_add_nonce (chain, sa->r_nonce);
2074 u8 *nat_detection_sha1 =
2075 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2076 clib_host_to_net_u64 (sa->rspi),
2077 clib_host_to_net_u32 (sa->raddr.as_u32),
2079 ikev2_payload_add_notify (chain,
2080 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2081 nat_detection_sha1);
2082 vec_free (nat_detection_sha1);
2083 nat_detection_sha1 =
2084 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2085 clib_host_to_net_u64 (sa->rspi),
2086 sa->iaddr.as_u32, udp->src_port);
2087 ikev2_payload_add_notify (chain,
2088 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2089 nat_detection_sha1);
2090 vec_free (nat_detection_sha1);
2093 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2095 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2097 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2098 ikev2_payload_add_auth (chain, &sa->r_auth);
2099 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2100 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2101 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2103 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2105 ikev2_payload_add_notify (chain,
2106 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2108 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2110 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2112 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2114 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2115 ikev2_payload_add_auth (chain, &sa->r_auth);
2117 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2119 ikev2_payload_add_notify (chain,
2120 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2121 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2122 ikev2_payload_add_auth (chain, &sa->r_auth);
2123 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2124 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2126 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2128 u8 *data = vec_new (u8, 1);
2130 data[0] = sa->unsupported_cp;
2131 ikev2_payload_add_notify (chain,
2132 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2136 else if (sa->state == IKEV2_STATE_SA_INIT)
2138 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2139 ikev2_payload_add_auth (chain, &sa->i_auth);
2140 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2141 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2142 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2143 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2148 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2152 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2154 /* if pending delete */
2157 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2159 if (sa->is_initiator)
2160 ikev2_payload_add_delete (chain, sa->del);
2162 /* The response to a request that deletes the IKE SA is an empty
2163 INFORMATIONAL response. */
2164 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2166 /* The response to a request that deletes ESP or AH SAs will contain
2167 delete payloads for the paired SAs going in the other direction. */
2170 ikev2_payload_add_delete (chain, sa->del);
2175 /* received N(AUTHENTICATION_FAILED) */
2176 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2178 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2181 /* received unsupported critical payload */
2182 else if (sa->unsupported_cp)
2184 u8 *data = vec_new (u8, 1);
2186 data[0] = sa->unsupported_cp;
2187 ikev2_payload_add_notify (chain,
2188 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2191 sa->unsupported_cp = 0;
2193 /* else send empty response */
2195 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2197 if (sa->is_initiator)
2200 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2201 ikev2_notify_t notify;
2202 u8 *data = vec_new (u8, 4);
2203 clib_memset (¬ify, 0, sizeof (notify));
2204 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2205 notify.spi = sa->childs[0].i_proposals->spi;
2206 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2208 ikev2_payload_add_sa (chain, proposals);
2209 ikev2_payload_add_nonce (chain, sa->i_nonce);
2210 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2211 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2212 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2219 if (vec_len (sa->rekey) > 0)
2221 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2222 ikev2_payload_add_nonce (chain, sa->r_nonce);
2223 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2225 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2227 vec_del1 (sa->rekey, 0);
2229 else if (sa->unsupported_cp)
2231 u8 *data = vec_new (u8, 1);
2233 data[0] = sa->unsupported_cp;
2234 ikev2_payload_add_notify (chain,
2235 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2238 sa->unsupported_cp = 0;
2242 ikev2_payload_add_notify (chain,
2243 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2250 ike->version = IKE_VERSION_2;
2251 ike->nextpayload = IKEV2_PAYLOAD_SK;
2252 tlen = sizeof (*ike);
2253 if (sa->is_initiator)
2255 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2256 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2260 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2264 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2266 tlen += vec_len (chain->data);
2267 ike->nextpayload = chain->first_payload_type;
2268 ike->length = clib_host_to_net_u32 (tlen);
2269 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2271 /* store whole IKE payload - needed for PSK auth */
2272 vec_free (sa->last_sa_init_res_packet_data);
2273 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2278 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2281 plen = sizeof (*ph);
2282 ph = (ike_payload_header_t *) & ike->payload[0];
2283 ph->nextpayload = chain->first_payload_type;
2285 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
2288 /* add space for hmac */
2289 plen += tr_integ->key_trunc;
2292 /* payload and total length */
2293 ph->length = clib_host_to_net_u16 (plen);
2294 ike->length = clib_host_to_net_u32 (tlen);
2296 /* calc integrity data for whole packet except hash itself */
2298 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2299 (u8 *) ike, tlen - tr_integ->key_trunc);
2301 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2302 sizeof (*ike), integ, tr_integ->key_trunc);
2304 /* store whole IKE payload - needed for retransmit */
2305 vec_free (sa->last_res_packet_data);
2306 vec_add (sa->last_res_packet_data, ike, tlen);
2310 ikev2_payload_destroy_chain (chain);
2316 ikev2_retransmit_sa_init (ike_header_t * ike,
2317 ip4_address_t iaddr, ip4_address_t raddr)
2319 ikev2_main_t *km = &ikev2_main;
2321 u32 thread_index = vlib_get_thread_index ();
2324 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2325 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2326 sa->iaddr.as_u32 == iaddr.as_u32 &&
2327 sa->raddr.as_u32 == raddr.as_u32)
2330 u32 len = clib_net_to_host_u32(ike->length);
2331 u8 payload = ike->nextpayload;
2333 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
2334 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2335 u32 plen = clib_net_to_host_u16(ikep->length);
2337 if (plen < sizeof(ike_payload_header_t))
2340 if (payload == IKEV2_PAYLOAD_NONCE)
2342 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2344 /* req is retransmit */
2345 if (sa->state == IKEV2_STATE_SA_INIT)
2348 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2349 ike->ispi = tmp->ispi;
2350 ike->rspi = tmp->rspi;
2351 ike->nextpayload = tmp->nextpayload;
2352 ike->version = tmp->version;
2353 ike->exchange = tmp->exchange;
2354 ike->flags = tmp->flags;
2355 ike->msgid = tmp->msgid;
2356 ike->length = tmp->length;
2357 clib_memcpy_fast(ike->payload, tmp->payload,
2358 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2359 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2360 "ispi %lx IKE_SA_INIT retransmit "
2361 "from %d.%d.%d.%d to %d.%d.%d.%d",
2363 raddr.as_u32, iaddr.as_u32);
2366 /* else ignore req */
2369 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2370 "ispi %lx IKE_SA_INIT ignore "
2371 "from %d.%d.%d.%d to %d.%d.%d.%d",
2373 raddr.as_u32, iaddr.as_u32);
2378 payload = ikep->nextpayload;
2385 /* req is not retransmit */
2390 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2392 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2395 if (msg_id > sa->last_msg_id)
2397 sa->last_msg_id = msg_id;
2400 /* retransmitted req */
2401 else if (msg_id == sa->last_msg_id)
2404 tmp = (ike_header_t *) sa->last_res_packet_data;
2405 ike->ispi = tmp->ispi;
2406 ike->rspi = tmp->rspi;
2407 ike->nextpayload = tmp->nextpayload;
2408 ike->version = tmp->version;
2409 ike->exchange = tmp->exchange;
2410 ike->flags = tmp->flags;
2411 ike->msgid = tmp->msgid;
2412 ike->length = tmp->length;
2413 clib_memcpy_fast (ike->payload, tmp->payload,
2414 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2415 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2416 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2419 /* old req ignore */
2422 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2423 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2429 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2431 ikev2_main_t *km = &ikev2_main;
2432 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2433 sa->profile_index = ~0;
2437 ikev2_del_sa_init_from_main (u64 * ispi)
2439 ikev2_main_t *km = &ikev2_main;
2440 uword *p = hash_get (km->sa_by_ispi, *ispi);
2443 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2444 hash_unset (km->sa_by_ispi, sai->ispi);
2445 ikev2_sa_free_all_vec (sai);
2446 pool_put (km->sais, sai);
2451 ikev2_del_sa_init (u64 ispi)
2453 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2458 ikev2_node_fn (vlib_main_t * vm,
2459 vlib_node_runtime_t * node, vlib_frame_t * frame)
2461 u32 n_left_from, *from, *to_next;
2462 ikev2_next_t next_index;
2463 ikev2_main_t *km = &ikev2_main;
2464 u32 thread_index = vlib_get_thread_index ();
2466 from = vlib_frame_vector_args (frame);
2467 n_left_from = frame->n_vectors;
2468 next_index = node->cached_next_index;
2470 while (n_left_from > 0)
2474 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2476 while (n_left_from > 0 && n_left_to_next > 0)
2480 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2485 ikev2_sa_t *sa0 = 0;
2486 ikev2_sa_t sa; /* temporary store for SA */
2488 int r, is_req = 0, has_non_esp_marker = 0;
2490 /* speculatively enqueue b0 to the current next frame */
2496 n_left_to_next -= 1;
2498 b0 = vlib_get_buffer (vm, bi0);
2500 if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2502 u8 *ptr = vlib_buffer_get_current (b0);
2503 ip40 = (ip4_header_t *) ptr;
2504 ptr += sizeof (*ip40);
2505 udp0 = (udp_header_t *) ptr;
2506 ptr += sizeof (*udp0);
2507 ike0 = (ike_header_t *) ptr;
2511 ike0 = vlib_buffer_get_current (b0);
2512 vlib_buffer_advance (b0, -sizeof (*udp0));
2513 udp0 = vlib_buffer_get_current (b0);
2514 vlib_buffer_advance (b0, -sizeof (*ip40));
2515 ip40 = vlib_buffer_get_current (b0);
2518 /* check for non-esp marker */
2519 if (*((u32 *) ike0) == 0)
2521 ike0 = (ike_header_t *) ((u8 *) ike0 + sizeof (u32));
2522 has_non_esp_marker = 1;
2525 if (ike0->version != IKE_VERSION_2)
2527 vlib_node_increment_counter (vm, ikev2_node.index,
2528 IKEV2_ERROR_NOT_IKEV2, 1);
2532 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2535 clib_memset (sa0, 0, sizeof (*sa0));
2537 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2539 if (ike0->rspi == 0)
2541 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2542 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2543 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2545 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2549 vlib_node_increment_counter (vm, ikev2_node.index,
2550 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2552 len = clib_net_to_host_u32 (ike0->length);
2557 vlib_node_increment_counter (vm, ikev2_node.index,
2558 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2563 ikev2_process_sa_init_req (vm, sa0, ike0, udp0);
2565 if (sa0->state == IKEV2_STATE_SA_INIT)
2567 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2569 ikev2_select_proposal (sa0->i_proposals,
2570 IKEV2_PROTOCOL_IKE);
2571 ikev2_generate_sa_init_data (sa0);
2574 if (sa0->state == IKEV2_STATE_SA_INIT
2575 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2577 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2580 if (sa0->state == IKEV2_STATE_SA_INIT)
2582 /* add SA to the pool */
2583 pool_get (km->per_thread_data[thread_index].sas,
2585 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2586 ikev2_init_sa (vm, sa0);
2588 per_thread_data[thread_index].sa_by_rspi,
2591 km->per_thread_data[thread_index].sas);
2595 ikev2_sa_free_all_vec (sa0);
2599 else //received sa_init without initiator flag
2601 sa0->raddr.as_u32 = ip40->src_address.as_u32;
2602 sa0->iaddr.as_u32 = ip40->dst_address.as_u32;
2603 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0);
2605 if (sa0->state == IKEV2_STATE_SA_INIT)
2608 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2609 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2613 pool_elt_at_index (km->sais, p[0]);
2615 if (clib_atomic_bool_cmp_and_swap
2616 (&sai->init_response_received, 0, 1))
2618 ikev2_complete_sa_data (sa0, sai);
2619 ikev2_calc_keys (sa0);
2620 ikev2_sa_auth_init (sa0);
2622 ikev2_generate_message (sa0, ike0, 0, udp0);
2626 /* we've already processed sa-init response */
2627 sa0->state = IKEV2_STATE_UNKNOWN;
2632 if (sa0->state == IKEV2_STATE_SA_INIT)
2634 /* add SA to the pool */
2635 pool_get (km->per_thread_data[thread_index].sas, sa0);
2636 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2637 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2639 sa0 - km->per_thread_data[thread_index].sas);
2643 ikev2_sa_free_all_vec (sa0);
2647 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2650 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2651 clib_net_to_host_u64 (ike0->rspi));
2655 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2658 r = ikev2_retransmit_resp (sa0, ike0);
2661 vlib_node_increment_counter (vm, ikev2_node.index,
2662 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2664 len = clib_net_to_host_u32 (ike0->length);
2669 vlib_node_increment_counter (vm, ikev2_node.index,
2670 IKEV2_ERROR_IKE_REQ_IGNORE,
2675 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2676 ikev2_process_auth_req (vm, sa0, ike0);
2677 ikev2_sa_auth (sa0);
2678 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2680 ikev2_initial_contact_cleanup (sa0);
2681 ikev2_sa_match_ts (sa0);
2682 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2683 ikev2_create_tunnel_interface (vm, thread_index, sa0,
2688 if (sa0->is_initiator)
2690 ikev2_del_sa_init (ike0->ispi);
2694 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2698 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2701 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2702 clib_net_to_host_u64 (ike0->rspi));
2706 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2709 r = ikev2_retransmit_resp (sa0, ike0);
2712 vlib_node_increment_counter (vm, ikev2_node.index,
2713 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2715 len = clib_net_to_host_u32 (ike0->length);
2720 vlib_node_increment_counter (vm, ikev2_node.index,
2721 IKEV2_ERROR_IKE_REQ_IGNORE,
2726 ikev2_process_informational_req (vm, sa0, ike0);
2729 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2731 ikev2_delete_t *d, *tmp, *resp = 0;
2732 vec_foreach (d, sa0->del)
2734 ikev2_child_sa_t *ch_sa;
2735 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2737 !sa0->is_initiator);
2740 ikev2_delete_tunnel_interface (km->vnet_main,
2742 if (!sa0->is_initiator)
2744 vec_add2 (resp, tmp, 1);
2745 tmp->protocol_id = d->protocol_id;
2746 tmp->spi = ch_sa->r_proposals[0].spi;
2748 ikev2_sa_del_child_sa (sa0, ch_sa);
2751 if (!sa0->is_initiator)
2753 vec_free (sa0->del);
2758 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
2760 ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
2761 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2765 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2768 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2769 clib_net_to_host_u64 (ike0->rspi));
2773 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2776 r = ikev2_retransmit_resp (sa0, ike0);
2779 vlib_node_increment_counter (vm, ikev2_node.index,
2780 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2782 len = clib_net_to_host_u32 (ike0->length);
2787 vlib_node_increment_counter (vm, ikev2_node.index,
2788 IKEV2_ERROR_IKE_REQ_IGNORE,
2793 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2796 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2799 ikev2_sa_free_all_child_sa (&sa0->childs);
2800 ikev2_child_sa_t *child;
2801 vec_add2 (sa0->childs, child, 1);
2802 clib_memset (child, 0, sizeof (*child));
2803 child->r_proposals = sa0->rekey[0].r_proposal;
2804 child->i_proposals = sa0->rekey[0].i_proposal;
2805 child->tsi = sa0->rekey[0].tsi;
2806 child->tsr = sa0->rekey[0].tsr;
2807 ikev2_create_tunnel_interface (vm, thread_index,
2809 child - sa0->childs,
2812 if (sa0->is_initiator)
2814 vec_free (sa0->rekey);
2818 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2825 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2826 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2828 ip40->src_address.as_u32,
2829 ip40->dst_address.as_u32);
2833 /* if we are sending packet back, rewrite headers */
2836 next0 = IKEV2_NEXT_IP4_LOOKUP;
2837 if (sa0->is_initiator)
2839 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2840 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2844 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2845 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2850 udp0->dst_port = udp0->src_port =
2851 clib_net_to_host_u16 (ikev2_get_port (sa0));
2853 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
2856 if (!has_non_esp_marker)
2857 len = ikev2_insert_non_esp_marker (ike0, len);
2862 if (has_non_esp_marker)
2863 len += sizeof (ikev2_non_esp_marker);
2865 u16 tp = udp0->dst_port;
2866 udp0->dst_port = udp0->src_port;
2867 udp0->src_port = tp;
2871 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2873 b0->current_length =
2874 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2875 ip40->length = clib_host_to_net_u16 (b0->current_length);
2876 ip40->checksum = ip4_header_checksum (ip40);
2879 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2880 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2882 ikev2_child_sa_t *c;
2884 vec_foreach (c, sa0->childs)
2885 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2887 ikev2_delete_sa (sa0);
2889 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2891 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2892 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2894 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2895 t->sw_if_index = sw_if_index0;
2896 t->next_index = next0;
2899 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2900 n_left_to_next, bi0, next0);
2903 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2906 vlib_node_increment_counter (vm, ikev2_node.index,
2907 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2908 return frame->n_vectors;
2912 VLIB_REGISTER_NODE (ikev2_node,static) = {
2913 .function = ikev2_node_fn,
2915 .vector_size = sizeof (u32),
2916 .format_trace = format_ikev2_trace,
2917 .type = VLIB_NODE_TYPE_INTERNAL,
2919 .n_errors = ARRAY_LEN(ikev2_error_strings),
2920 .error_strings = ikev2_error_strings,
2922 .n_next_nodes = IKEV2_N_NEXT,
2925 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2926 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2931 // set ikev2 proposals when vpp is used as initiator
2932 static clib_error_t *
2933 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2934 ikev2_transforms_set * ts,
2935 ikev2_sa_proposal_t ** proposals, int is_ike)
2938 ikev2_main_t *km = &ikev2_main;
2939 ikev2_sa_proposal_t *proposal;
2940 vec_add2 (*proposals, proposal, 1);
2941 ikev2_sa_transform_t *td;
2946 vec_foreach (td, km->supported_transforms)
2948 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2949 && td->encr_type == ts->crypto_alg
2950 && td->key_len == ts->crypto_key_size / 8)
2953 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2954 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2955 vec_add (td->attrs, (u8 *) attr, 4);
2956 vec_add1 (proposal->transforms, *td);
2965 r = clib_error_return (0, "Unsupported algorithm");
2969 if (is_ike || IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 != ts->crypto_alg)
2973 vec_foreach (td, km->supported_transforms)
2975 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2976 && td->integ_type == ts->integ_alg)
2978 vec_add1 (proposal->transforms, *td);
2986 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2987 r = clib_error_return (0, "Unsupported algorithm");
2996 vec_foreach (td, km->supported_transforms)
2998 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2999 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3001 vec_add1 (proposal->transforms, *td);
3008 r = clib_error_return (0, "Unsupported algorithm");
3014 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
3017 vec_foreach (td, km->supported_transforms)
3019 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3021 vec_add1 (proposal->transforms, *td);
3024 sa->dh_group = td->dh_type;
3032 r = clib_error_return (0, "Unsupported algorithm");
3040 vec_foreach (td, km->supported_transforms)
3042 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3044 vec_add1 (proposal->transforms, *td);
3051 r = clib_error_return (0, "Unsupported algorithm");
3060 static ikev2_profile_t *
3061 ikev2_profile_index_by_name (u8 * name)
3063 ikev2_main_t *km = &ikev2_main;
3066 p = mhash_get (&km->profile_index_by_name, name);
3070 return pool_elt_at_index (km->profiles, p[0]);
3075 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
3076 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3084 b0 = vlib_get_buffer (vm, bi0);
3085 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3086 udp0 = vlib_buffer_get_current (b0);
3087 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3088 ip40 = vlib_buffer_get_current (b0);
3091 ip40->ip_version_and_header_length = 0x45;
3093 ip40->fragment_id = 0;
3094 ip40->flags_and_fragment_offset = 0;
3096 ip40->protocol = IP_PROTOCOL_UDP;
3097 ip40->dst_address.as_u32 = dst->as_u32;
3098 ip40->src_address.as_u32 = src->as_u32;
3099 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3100 udp0->src_port = clib_host_to_net_u16 (src_port);
3101 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3103 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3104 ip40->length = clib_host_to_net_u16 (b0->current_length);
3105 ip40->checksum = ip4_header_checksum (ip40);
3107 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3108 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3110 /* send the request */
3111 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
3112 to_next = vlib_frame_vector_args (f);
3115 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
3120 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
3123 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3128 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
3129 *ike = vlib_buffer_get_current (b0);
3134 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3136 ikev2_main_t *km = &ikev2_main;
3138 km->pkey = ikev2_load_key_file (file);
3139 if (km->pkey == NULL)
3140 return clib_error_return (0, "load key '%s' failed", file);
3145 static_always_inline vnet_api_error_t
3146 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3148 ikev2_main_t *km = &ikev2_main;
3149 udp_dst_port_info_t *pi;
3151 uword *v = hash_get (km->udp_ports, port);
3152 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3156 /* IKE already uses this port, only increment reference counter */
3163 return VNET_API_ERROR_UDP_PORT_TAKEN;
3165 udp_register_dst_port (km->vlib_main, port,
3166 ipsec4_tun_input_node.index, 1);
3167 hash_set (km->udp_ports, port, 1);
3169 p->ipsec_over_udp_port = port;
3173 static_always_inline void
3174 ikev2_unregister_udp_port (ikev2_profile_t * p)
3176 ikev2_main_t *km = &ikev2_main;
3179 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3182 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3190 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3191 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3194 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3198 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3199 ikev2_main_per_thread_data_t * tkm,
3202 ikev2_main_t *km = &ikev2_main;
3203 ip4_address_t *src, *dst;
3205 /* Create the Initiator notification for IKE SA removal */
3210 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3213 ikev2_log_error ("buffer alloc failure");
3217 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3218 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3219 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3220 vec_resize (sa->del, 1);
3221 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3222 sa->del->spi = sa->ispi;
3223 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3224 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3225 len = ikev2_generate_message (sa, ike0, 0, 0);
3227 if (sa->is_initiator)
3238 ikev2_send_ike (vm, src, dst, bi0, len,
3239 ikev2_get_port (sa), sa->dst_port, 0);
3241 /* delete local SA */
3242 ikev2_child_sa_t *c;
3243 vec_foreach (c, sa->childs)
3244 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3246 u64 rspi = sa->rspi;
3247 ikev2_sa_free_all_vec (sa);
3248 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3251 hash_unset (tkm->sa_by_rspi, rspi);
3252 pool_put (tkm->sas, sa);
3257 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3259 ikev2_main_per_thread_data_t *tkm;
3261 u32 pi = p - km->profiles;
3265 vec_foreach (tkm, km->per_thread_data)
3268 pool_foreach (sa, tkm->sas, ({
3269 if (sa->profile_index != ~0 && pi == sa->profile_index)
3270 vec_add1 (del_sai, sa - tkm->sas);
3274 vec_foreach (sai, del_sai)
3276 sa = pool_elt_at_index (tkm->sas, sai[0]);
3277 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa);
3280 vec_reset_length (del_sai);
3287 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3289 ikev2_main_t *km = &ikev2_main;
3294 if (ikev2_profile_index_by_name (name))
3295 return clib_error_return (0, "policy %v already exists", name);
3297 pool_get (km->profiles, p);
3298 clib_memset (p, 0, sizeof (*p));
3299 p->name = vec_dup (name);
3300 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3301 p->responder.sw_if_index = ~0;
3303 uword index = p - km->profiles;
3304 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3308 p = ikev2_profile_index_by_name (name);
3310 return clib_error_return (0, "policy %v does not exists", name);
3312 ikev2_unregister_udp_port (p);
3313 ikev2_cleanup_profile_sessions (km, p);
3316 pool_put (km->profiles, p);
3317 mhash_unset (&km->profile_index_by_name, name, 0);
3323 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3324 u8 * auth_data, u8 data_hex_format)
3329 p = ikev2_profile_index_by_name (name);
3333 r = clib_error_return (0, "unknown profile %v", name);
3336 vec_free (p->auth.data);
3337 p->auth.method = auth_method;
3338 p->auth.data = vec_dup (auth_data);
3339 p->auth.hex = data_hex_format;
3341 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3343 vec_add1 (p->auth.data, 0);
3345 EVP_PKEY_free (p->auth.key);
3346 p->auth.key = ikev2_load_cert_file (auth_data);
3347 if (p->auth.key == NULL)
3348 return clib_error_return (0, "load cert '%s' failed", auth_data);
3355 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3361 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
3362 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
3364 r = clib_error_return (0, "unsupported identity type %U",
3365 format_ikev2_id_type, id_type);
3369 p = ikev2_profile_index_by_name (name);
3373 r = clib_error_return (0, "unknown profile %v", name);
3379 vec_free (p->loc_id.data);
3380 p->loc_id.type = id_type;
3381 p->loc_id.data = vec_dup (data);
3385 vec_free (p->rem_id.data);
3386 p->rem_id.type = id_type;
3387 p->rem_id.data = vec_dup (data);
3394 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3395 u16 start_port, u16 end_port, ip4_address_t start_addr,
3396 ip4_address_t end_addr, int is_local)
3401 p = ikev2_profile_index_by_name (name);
3405 r = clib_error_return (0, "unknown profile %v", name);
3411 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
3412 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
3413 p->loc_ts.start_port = start_port;
3414 p->loc_ts.end_port = end_port;
3415 p->loc_ts.protocol_id = protocol_id;
3416 p->loc_ts.ts_type = 7;
3420 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3421 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3422 p->rem_ts.start_port = start_port;
3423 p->rem_ts.end_port = end_port;
3424 p->rem_ts.protocol_id = protocol_id;
3425 p->rem_ts.ts_type = 7;
3433 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3434 u32 sw_if_index, ip4_address_t ip4)
3439 p = ikev2_profile_index_by_name (name);
3443 r = clib_error_return (0, "unknown profile %v", name);
3447 p->responder.sw_if_index = sw_if_index;
3448 p->responder.ip4 = ip4;
3454 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3455 ikev2_transform_encr_type_t crypto_alg,
3456 ikev2_transform_integ_type_t integ_alg,
3457 ikev2_transform_dh_type_t dh_type,
3458 u32 crypto_key_size)
3463 p = ikev2_profile_index_by_name (name);
3467 r = clib_error_return (0, "unknown profile %v", name);
3471 p->ike_ts.crypto_alg = crypto_alg;
3472 p->ike_ts.integ_alg = integ_alg;
3473 p->ike_ts.dh_type = dh_type;
3474 p->ike_ts.crypto_key_size = crypto_key_size;
3479 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3480 ikev2_transform_encr_type_t crypto_alg,
3481 ikev2_transform_integ_type_t integ_alg,
3482 ikev2_transform_dh_type_t dh_type,
3483 u32 crypto_key_size)
3488 p = ikev2_profile_index_by_name (name);
3492 r = clib_error_return (0, "unknown profile %v", name);
3496 p->esp_ts.crypto_alg = crypto_alg;
3497 p->esp_ts.integ_alg = integ_alg;
3498 p->esp_ts.dh_type = dh_type;
3499 p->esp_ts.crypto_key_size = crypto_key_size;
3504 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3505 u8 * name, u32 sw_if_index)
3510 p = ikev2_profile_index_by_name (name);
3514 r = clib_error_return (0, "unknown profile %v", name);
3518 p->tun_itf = sw_if_index;
3524 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3527 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3528 ikev2_main_t *km = &ikev2_main;
3529 vnet_api_error_t rv = 0;
3533 return VNET_API_ERROR_INVALID_VALUE;
3537 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
3538 return VNET_API_ERROR_VALUE_EXIST;
3540 rv = ikev2_register_udp_port (p, port);
3544 v = hash_get (km->udp_ports, port);
3546 return VNET_API_ERROR_IKE_NO_PORT;
3548 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3549 return VNET_API_ERROR_INVALID_VALUE;
3551 ikev2_unregister_udp_port (p);
3557 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3559 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3564 r = clib_error_return (0, "unknown profile %v", name);
3573 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3574 u64 lifetime, u32 jitter, u32 handover,
3580 p = ikev2_profile_index_by_name (name);
3584 r = clib_error_return (0, "unknown profile %v", name);
3588 p->lifetime = lifetime;
3589 p->lifetime_jitter = jitter;
3590 p->handover = handover;
3591 p->lifetime_maxdata = maxdata;
3596 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3600 ip4_main_t *im = &ip4_main;
3601 ikev2_main_t *km = &ikev2_main;
3603 p = ikev2_profile_index_by_name (name);
3607 r = clib_error_return (0, "unknown profile %v", name);
3611 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3613 r = clib_error_return (0, "responder not set for profile %v", name);
3618 /* Create the Initiator Request */
3622 ip_lookup_main_t *lm = &im->lookup_main;
3624 int len = sizeof (ike_header_t);
3626 /* Get own iface IP */
3628 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3629 ip_interface_address_t *if_add =
3630 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3631 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3633 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3636 char *errmsg = "buffer alloc failure";
3637 ikev2_log_error (errmsg);
3638 return clib_error_return (0, errmsg);
3641 /* Prepare the SA and the IKE payload */
3643 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3644 ikev2_payload_chain_t *chain = 0;
3645 ikev2_payload_new_chain (chain);
3647 /* Build the IKE proposal payload */
3648 ikev2_sa_proposal_t *proposals = 0;
3649 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3650 proposals[0].proposal_num = 1;
3651 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3653 /* Add and then cleanup proposal data */
3654 ikev2_payload_add_sa (chain, proposals);
3655 ikev2_sa_free_proposal_vector (&proposals);
3657 sa.is_initiator = 1;
3658 sa.profile_index = p - km->profiles;
3659 sa.state = IKEV2_STATE_SA_INIT;
3660 sa.tun_itf = p->tun_itf;
3661 sa.udp_encap = p->udp_encap;
3662 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
3663 sa.is_tun_itf_set = 1;
3664 sa.initial_contact = 1;
3665 sa.dst_port = IKEV2_PORT;
3666 ikev2_generate_sa_init_data (&sa);
3667 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3668 ikev2_payload_add_nonce (chain, sa.i_nonce);
3670 /* Build the child SA proposal */
3671 vec_resize (sa.childs, 1);
3672 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3673 &sa.childs[0].i_proposals, 0);
3674 sa.childs[0].i_proposals[0].proposal_num = 1;
3675 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3676 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3677 sizeof (sa.childs[0].i_proposals[0].spi));
3679 /* Add NAT detection notification messages (mandatory) */
3680 u8 *nat_detection_sha1 =
3681 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3682 clib_host_to_net_u64 (sa.rspi),
3683 clib_host_to_net_u32 (if_ip->as_u32),
3684 clib_host_to_net_u16 (IKEV2_PORT));
3686 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3687 nat_detection_sha1);
3688 vec_free (nat_detection_sha1);
3689 nat_detection_sha1 =
3690 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3691 clib_host_to_net_u64 (sa.rspi),
3692 clib_host_to_net_u32 (p->responder.ip4.as_u32),
3693 clib_host_to_net_u16 (sa.dst_port));
3694 ikev2_payload_add_notify (chain,
3695 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3696 nat_detection_sha1);
3697 vec_free (nat_detection_sha1);
3699 u8 *sig_hash_algo = vec_new (u8, 8);
3700 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3701 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3702 ikev2_payload_add_notify (chain,
3703 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3705 vec_free (sig_hash_algo);
3708 /* Buffer update and boilerplate */
3709 len += vec_len (chain->data);
3710 ike0->nextpayload = chain->first_payload_type;
3711 ike0->length = clib_host_to_net_u32 (len);
3712 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3713 ikev2_payload_destroy_chain (chain);
3715 ike0->version = IKE_VERSION_2;
3716 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3717 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3718 ike0->ispi = sa.ispi;
3722 /* store whole IKE payload - needed for PSK auth */
3723 vec_free (sa.last_sa_init_req_packet_data);
3724 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3726 /* add data to the SA then add it to the pool */
3727 sa.iaddr.as_u32 = if_ip->as_u32;
3728 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3729 sa.i_id.type = p->loc_id.type;
3730 sa.i_id.data = vec_dup (p->loc_id.data);
3731 sa.i_auth.method = p->auth.method;
3732 sa.i_auth.hex = p->auth.hex;
3733 sa.i_auth.data = vec_dup (p->auth.data);
3734 sa.sw_if_index = p->responder.sw_if_index;
3735 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3736 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3738 ikev2_initial_contact_cleanup (&sa);
3740 /* add SA to the pool */
3741 ikev2_sa_t *sa0 = 0;
3742 pool_get (km->sais, sa0);
3743 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3744 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3746 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len,
3747 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
3749 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3750 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3751 p->responder.ip4.as_u32);
3758 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3759 ikev2_child_sa_t * csa)
3761 /* Create the Initiator notification for child SA removal */
3762 ikev2_main_t *km = &ikev2_main;
3767 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3770 ikev2_log_error ("buffer alloc failure");
3774 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3775 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3776 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3777 vec_resize (sa->del, 1);
3778 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3779 sa->del->spi = csa->i_proposals->spi;
3780 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3781 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3782 len = ikev2_generate_message (sa, ike0, 0, 0);
3784 len = ikev2_insert_non_esp_marker (ike0, len);
3785 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3786 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
3788 /* delete local child SA */
3789 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3790 ikev2_sa_del_child_sa (sa, csa);
3794 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3797 ikev2_main_t *km = &ikev2_main;
3798 ikev2_main_per_thread_data_t *tkm;
3799 ikev2_sa_t *fsa = 0;
3800 ikev2_child_sa_t *fchild = 0;
3802 /* Search for the child SA */
3803 vec_foreach (tkm, km->per_thread_data)
3809 pool_foreach (sa, tkm->sas, ({
3810 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3820 if (!fchild || !fsa)
3822 r = clib_error_return (0, "Child SA not found");
3827 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3834 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3837 ikev2_main_t *km = &ikev2_main;
3838 ikev2_main_per_thread_data_t *tkm;
3839 ikev2_sa_t *fsa = 0;
3840 ikev2_main_per_thread_data_t *ftkm = 0;
3842 /* Search for the IKE SA */
3843 vec_foreach (tkm, km->per_thread_data)
3849 pool_foreach (sa, tkm->sas, ({
3850 if (sa->ispi == ispi)
3862 r = clib_error_return (0, "IKE SA not found");
3866 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa);
3871 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3872 ikev2_child_sa_t * csa)
3874 /* Create the Initiator request for create child SA */
3879 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3882 ikev2_log_error ("buffer alloc failure");
3886 ike0->version = IKE_VERSION_2;
3887 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3888 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3889 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3890 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3891 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3892 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3894 ikev2_rekey_t *rekey;
3895 vec_add2 (sa->rekey, rekey, 1);
3896 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3899 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3900 rekey->spi = proposals[0].spi;
3901 rekey->ispi = csa->i_proposals->spi;
3902 len = ikev2_generate_message (sa, ike0, proposals, 0);
3904 len = ikev2_insert_non_esp_marker (ike0, len);
3905 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3906 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
3907 vec_free (proposals);
3911 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3914 ikev2_main_t *km = &ikev2_main;
3915 ikev2_main_per_thread_data_t *tkm;
3916 ikev2_sa_t *fsa = 0;
3917 ikev2_child_sa_t *fchild = 0;
3919 /* Search for the child SA */
3920 vec_foreach (tkm, km->per_thread_data)
3926 pool_foreach (sa, tkm->sas, ({
3927 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3937 if (!fchild || !fsa)
3939 r = clib_error_return (0, "Child SA not found");
3944 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3951 ikev2_init (vlib_main_t * vm)
3953 ikev2_main_t *km = &ikev2_main;
3954 vlib_thread_main_t *tm = vlib_get_thread_main ();
3957 clib_memset (km, 0, sizeof (ikev2_main_t));
3958 km->vnet_main = vnet_get_main ();
3961 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
3962 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
3963 ikev2_crypto_init (km);
3965 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3967 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
3968 CLIB_CACHE_LINE_BYTES);
3969 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3971 km->per_thread_data[thread_id].sa_by_rspi =
3972 hash_create (0, sizeof (uword));
3975 km->sa_by_ispi = hash_create (0, sizeof (uword));
3976 km->sw_if_indices = hash_create (0, 0);
3977 km->udp_ports = hash_create (0, sizeof (uword));
3979 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node.index, 1);
3980 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node.index, 1);
3982 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2");
3983 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
3985 ikev2_cli_reference ();
3987 km->log_level = IKEV2_LOG_ERROR;
3988 km->log_class = vlib_log_register_class ("ikev2", 0);
3993 VLIB_INIT_FUNCTION (ikev2_init) =
3995 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4000 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4003 ikev2_main_t *km = &ikev2_main;
4004 ikev2_profile_t *p = 0;
4005 vlib_main_t *vm = km->vlib_main;
4006 f64 now = vlib_time_now (vm);
4009 if (sa->profile_index != ~0)
4010 p = pool_elt_at_index (km->profiles, sa->profile_index);
4012 if (sa->is_initiator && p && csa->time_to_expiration
4013 && now > csa->time_to_expiration)
4015 if (!csa->is_expired || csa->rekey_retries > 0)
4017 ikev2_rekey_child_sa_internal (vm, sa, csa);
4018 csa->time_to_expiration = now + p->handover;
4019 csa->is_expired = 1;
4020 if (csa->rekey_retries == 0)
4022 csa->rekey_retries = 5;
4024 else if (csa->rekey_retries > 0)
4026 csa->rekey_retries--;
4027 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4028 csa->i_proposals->spi, csa->rekey_retries);
4029 if (csa->rekey_retries == 0)
4031 csa->rekey_retries = -1;
4038 csa->time_to_expiration = 0;
4039 ikev2_delete_child_sa_internal (vm, sa, csa);
4046 ipip_tunnel_t *ipip = NULL;
4047 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4048 if (~0 == sw_if_index)
4050 ip46_address_t local_ip;
4051 ip46_address_t remote_ip;
4052 if (sa->is_initiator)
4054 ip46_address_set_ip4 (&local_ip, &sa->iaddr);
4055 ip46_address_set_ip4 (&remote_ip, &sa->raddr);
4059 ip46_address_set_ip4 (&local_ip, &sa->raddr);
4060 ip46_address_set_ip4 (&remote_ip, &sa->iaddr);
4064 ipip_tunnel_key_t key = {
4067 .transport = IPIP_TRANSPORT_IP4,
4072 ipip = ipip_tunnel_db_find (&key);
4075 sw_if_index = ipip->sw_if_index;
4081 vec_add1 (sas_in, csa->remote_sa_id);
4082 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
4083 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4090 ikev2_set_log_level (ikev2_log_level_t log_level)
4092 ikev2_main_t *km = &ikev2_main;
4094 if (log_level >= IKEV2_LOG_MAX)
4096 ikev2_log_error ("unknown logging level %d", log_level);
4100 km->log_level = log_level;
4105 ikev2_set_liveness_params (u32 period, u32 max_retries)
4107 ikev2_main_t *km = &ikev2_main;
4109 if (period == 0 || max_retries == 0)
4110 return clib_error_return (0, "invalid args");
4112 km->liveness_period = period;
4113 km->liveness_max_retries = max_retries;
4118 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4120 ikev2_main_t *km = &ikev2_main;
4121 vlib_main_t *vm = km->vlib_main;
4122 ikev2_main_per_thread_data_t *tkm;
4123 ikev2_sa_t *fsa = 0;
4124 ikev2_profile_t *p = 0;
4125 ikev2_child_sa_t *fchild = 0;
4126 f64 now = vlib_time_now (vm);
4127 vlib_counter_t counts;
4129 /* Search for the SA and child SA */
4130 vec_foreach (tkm, km->per_thread_data)
4136 pool_foreach (sa, tkm->sas, ({
4137 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4146 vlib_get_combined_counter (&ipsec_sa_counters,
4147 ipsec_sa->stat_index, &counts);
4149 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4150 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4152 if (fchild && p && p->lifetime_maxdata)
4154 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4156 fchild->time_to_expiration = now;
4162 ikev2_process_pending_sa_init (ikev2_main_t * km)
4169 hash_foreach (ispi, sai, km->sa_by_ispi,
4171 sa = pool_elt_at_index (km->sais, sai);
4172 if (sa->init_response_received)
4176 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4179 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
4180 clib_memcpy_fast (vlib_buffer_get_current (b),
4181 sa->last_sa_init_req_packet_data,
4182 vec_len (sa->last_sa_init_req_packet_data));
4183 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4184 vec_len (sa->last_sa_init_req_packet_data),
4185 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4190 static vlib_node_registration_t ikev2_mngr_process_node;
4193 ikev2_send_informational_request (ikev2_sa_t * sa)
4195 ikev2_main_t *km = &ikev2_main;
4196 ip4_address_t *src, *dst;
4202 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &ike0);
4205 ikev2_log_error ("buffer alloc failure");
4209 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4210 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4211 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4212 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4213 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4214 len = ikev2_generate_message (sa, ike0, 0, 0);
4216 len = ikev2_insert_non_esp_marker (ike0, len);
4218 if (sa->is_initiator)
4229 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4230 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4234 static_always_inline int
4235 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4237 ikev2_main_t *km = &ikev2_main;
4238 vlib_main_t *vm = km->vlib_main;
4240 if (!sa->sk_ai || !sa->sk_ar)
4243 if (sa->liveness_retries >= km->liveness_max_retries)
4246 f64 now = vlib_time_now (vm);
4248 if (sa->liveness_period_check < now)
4250 sa->liveness_retries++;
4251 sa->liveness_period_check = now + km->liveness_period;
4252 ikev2_send_informational_request (sa);
4258 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4261 ikev2_main_t *km = &ikev2_main;
4262 ipsec_main_t *im = &ipsec_main;
4264 ikev2_child_sa_t *c;
4270 vlib_process_wait_for_event_or_clock (vm, 1);
4271 vlib_process_get_events (vm, NULL);
4273 /* process ike child sas */
4274 ikev2_main_per_thread_data_t *tkm;
4275 vec_foreach (tkm, km->per_thread_data)
4278 u32 *to_be_deleted = 0;
4281 pool_foreach (sa, tkm->sas, ({
4282 ikev2_child_sa_t *c;
4284 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4286 sa->old_remote_id_present = 0;
4290 sa->old_id_expiration -= 1;
4292 vec_foreach (c, sa->childs)
4294 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4297 if (ikev2_mngr_process_responder_sas (sa))
4298 vec_add1 (to_be_deleted, sa - tkm->sas);
4302 vec_foreach (sai, to_be_deleted)
4304 sa = pool_elt_at_index (tkm->sas, sai[0]);
4305 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
4306 vec_foreach (c, sa->childs)
4308 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4309 ikev2_sa_del_child_sa (sa, c);
4311 ikev2_sa_free_all_vec (sa);
4312 hash_unset (tkm->sa_by_rspi, sa->rspi);
4313 pool_put (tkm->sas, sa);
4317 p = pool_elt_at_index (km->profiles, sa->profile_index);
4320 ikev2_initiate_sa_init (vm, p->name);
4324 vec_free (to_be_deleted);
4327 /* process ipsec sas */
4330 pool_foreach (sa, im->sad, ({
4331 ikev2_mngr_process_ipsec_sa(sa);
4335 ikev2_process_pending_sa_init (km);
4339 vlib_process_wait_for_event_or_clock (vm, 5);
4340 vlib_process_get_events (vm, NULL);
4349 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4350 .function = ikev2_mngr_process_fn,
4351 .type = VLIB_NODE_TYPE_PROCESS,
4353 "ikev2-manager-process",
4356 VLIB_PLUGIN_REGISTER () = {
4357 .version = VPP_BUILD_VER,
4358 .description = "Internet Key Exchange (IKEv2) Protocol",
4363 * fd.io coding-style-patch-verification: ON
4366 * eval: (c-set-style "gnu")