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 <vppinfra/error.h>
22 #include <vppinfra/random.h>
23 #include <vnet/udp/udp.h>
24 #include <vnet/ipsec/ipsec.h>
25 #include <vnet/ipsec/ipsec_tun.h>
26 #include <vnet/ipip/ipip.h>
27 #include <plugins/ikev2/ikev2.h>
28 #include <plugins/ikev2/ikev2_priv.h>
29 #include <openssl/sha.h>
30 #include <vnet/ipsec/ipsec_punt.h>
32 #define IKEV2_LIVENESS_RETRIES 3
33 #define IKEV2_LIVENESS_PERIOD_CHECK 30
35 ikev2_main_t ikev2_main;
37 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
39 ikev2_child_sa_t * child);
41 #define ikev2_set_state(sa, v) do { \
43 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
53 format_ikev2_trace (u8 * s, va_list * args)
55 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
56 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
57 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
59 s = format (s, "ikev2: sw_if_index %d, next index %d",
60 t->sw_if_index, t->next_index);
64 #define foreach_ikev2_error \
65 _(PROCESSED, "IKEv2 packets processed") \
66 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
67 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
68 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
69 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
70 _(NOT_IKEV2, "Non IKEv2 packets received") \
71 _(BAD_LENGTH, "Bad packet length") \
72 _(MALFORMED_PACKET, "Malformed packet") \
73 _(NO_BUFF_SPACE, "No buffer space")
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_IP4_ERROR_DROP,
98 IKEV2_NEXT_IP6_LOOKUP,
99 IKEV2_NEXT_IP6_ERROR_DROP,
103 typedef u32 ikev2_non_esp_marker;
105 static_always_inline u16
106 ikev2_get_port (ikev2_sa_t * sa)
108 return ikev2_natt_active (sa) ? IKEV2_PORT_NATT : IKEV2_PORT;
111 static_always_inline int
112 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
114 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
115 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
116 return len + sizeof (ikev2_non_esp_marker);
119 static ikev2_sa_transform_t *
120 ikev2_find_transform_data (ikev2_sa_transform_t * t)
122 ikev2_main_t *km = &ikev2_main;
123 ikev2_sa_transform_t *td;
125 vec_foreach (td, km->supported_transforms)
127 if (td->type != t->type)
130 if (td->transform_id != t->transform_id)
133 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
135 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
136 || t->attrs[1] != 14)
139 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
147 static ikev2_sa_proposal_t *
148 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
149 ikev2_protocol_id_t prot_id)
151 ikev2_sa_proposal_t *rv = 0;
152 ikev2_sa_proposal_t *proposal;
153 ikev2_sa_transform_t *transform, *new_t;
154 u8 mandatory_bitmap, optional_bitmap;
156 if (prot_id == IKEV2_PROTOCOL_IKE)
158 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
159 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
160 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
162 else if (prot_id == IKEV2_PROTOCOL_ESP)
164 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
165 (1 << IKEV2_TRANSFORM_TYPE_ESN);
166 optional_bitmap = mandatory_bitmap |
167 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
169 else if (prot_id == IKEV2_PROTOCOL_AH)
171 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
172 (1 << IKEV2_TRANSFORM_TYPE_ESN);
173 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
178 vec_add2 (rv, proposal, 1);
180 vec_foreach (proposal, proposals)
183 if (proposal->protocol_id != prot_id)
186 vec_foreach (transform, proposal->transforms)
188 if ((1 << transform->type) & bitmap)
191 if (ikev2_find_transform_data (transform))
193 bitmap |= 1 << transform->type;
194 vec_add2 (rv->transforms, new_t, 1);
195 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
196 new_t->attrs = vec_dup (transform->attrs);
200 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
201 (bitmap & ~optional_bitmap) == 0)
203 rv->proposal_num = proposal->proposal_num;
204 rv->protocol_id = proposal->protocol_id;
205 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
210 vec_free (rv->transforms);
219 ikev2_sa_transform_t *
220 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
221 ikev2_transform_type_t type)
223 ikev2_sa_transform_t *t;
228 vec_foreach (t, p->transforms)
231 return ikev2_find_transform_data (t);
237 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
241 vec_foreach (c, sa->childs)
243 ikev2_sa_proposal_t *proposal =
244 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
245 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
253 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
255 ikev2_sa_proposal_t *p;
256 ikev2_sa_transform_t *t;
263 vec_foreach (t, p->transforms)
267 vec_free (p->transforms);
273 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
275 ikev2_sa_free_proposal_vector (&c->r_proposals);
276 ikev2_sa_free_proposal_vector (&c->i_proposals);
286 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
289 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
295 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
297 ikev2_sa_free_child_sa (child);
298 vec_del1 (sa->childs, child - sa->childs);
302 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
304 vec_free (sa->i_nonce);
305 vec_free (sa->r_nonce);
307 vec_free (sa->dh_shared_key);
308 vec_free (sa->dh_private_key);
309 vec_free (sa->i_dh_data);
310 vec_free (sa->r_dh_data);
312 ikev2_sa_free_proposal_vector (&sa->r_proposals);
313 ikev2_sa_free_proposal_vector (&sa->i_proposals);
316 vec_free (sa->sk_ai);
317 vec_free (sa->sk_ar);
318 vec_free (sa->sk_ei);
319 vec_free (sa->sk_er);
320 vec_free (sa->sk_pi);
321 vec_free (sa->sk_pr);
323 vec_free (sa->i_id.data);
324 vec_free (sa->r_id.data);
326 vec_free (sa->i_auth.data);
328 EVP_PKEY_free (sa->i_auth.key);
329 vec_free (sa->r_auth.data);
331 EVP_PKEY_free (sa->r_auth.key);
335 vec_free (sa->rekey);
337 vec_free (sa->last_sa_init_req_packet_data);
338 vec_free (sa->last_sa_init_res_packet_data);
340 vec_free (sa->last_res_packet_data);
342 ikev2_sa_free_all_child_sa (&sa->childs);
346 ikev2_delete_sa (ikev2_main_per_thread_data_t * ptd, ikev2_sa_t * sa)
350 ikev2_sa_free_all_vec (sa);
352 p = hash_get (ptd->sa_by_rspi, sa->rspi);
355 hash_unset (ptd->sa_by_rspi, sa->rspi);
356 pool_put (ptd->sas, sa);
361 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
363 ikev2_sa_transform_t *t = 0, *t2;
364 ikev2_main_t *km = &ikev2_main;
366 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
371 /* check if received DH group is on our list of supported groups */
372 vec_foreach (t2, km->supported_transforms)
374 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
383 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
387 if (sa->is_initiator)
390 RAND_bytes ((u8 *) & sa->ispi, 8);
393 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
394 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
399 RAND_bytes ((u8 *) & sa->rspi, 8);
402 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
403 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
406 /* generate dh keys */
407 ikev2_generate_dh (sa, t);
412 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
414 ikev2_sa_transform_t *t = 0, *t2;
415 ikev2_main_t *km = &ikev2_main;
417 /*move some data to the new SA */
418 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
419 sa->i_nonce = _(sai->i_nonce);
420 sa->i_dh_data = _(sai->i_dh_data);
421 sa->dh_private_key = _(sai->dh_private_key);
422 ip_address_copy (&sa->iaddr, &sai->iaddr);
423 ip_address_copy (&sa->raddr, &sai->raddr);
424 sa->is_initiator = sai->is_initiator;
425 sa->i_id.type = sai->i_id.type;
426 sa->r_id.type = sai->r_id.type;
427 sa->profile_index = sai->profile_index;
428 sa->tun_itf = sai->tun_itf;
429 sa->is_tun_itf_set = sai->is_tun_itf_set;
430 sa->natt_state = sai->natt_state;
431 sa->i_id.data = _(sai->i_id.data);
432 sa->r_id.data = _(sai->r_id.data);
433 sa->i_auth.method = sai->i_auth.method;
434 sa->i_auth.hex = sai->i_auth.hex;
435 sa->i_auth.data = _(sai->i_auth.data);
436 sa->i_auth.key = _(sai->i_auth.key);
437 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
438 sa->last_init_msg_id = sai->last_init_msg_id;
439 sa->childs = _(sai->childs);
440 sa->udp_encap = sai->udp_encap;
441 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
442 sa->dst_port = sai->dst_port;
443 sa->sw_if_index = sai->sw_if_index;
447 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
452 /* check if received DH group is on our list of supported groups */
453 vec_foreach (t2, km->supported_transforms)
455 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
464 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
469 /* generate dh keys */
470 ikev2_complete_dh (sa, t);
475 ikev2_calc_keys (ikev2_sa_t * sa)
478 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
481 u16 integ_key_len = 0, salt_len = 0;
482 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
484 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
486 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
488 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
491 integ_key_len = tr_integ->key_len;
493 salt_len = sizeof (u32);
495 vec_append (s, sa->i_nonce);
496 vec_append (s, sa->r_nonce);
497 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
499 /* Calculate S = Ni | Nr | SPIi | SPIr */
501 vec_add2 (s, tmp, 2 * sizeof (*spi));
503 spi[0] = clib_host_to_net_u64 (sa->ispi);
504 spi[1] = clib_host_to_net_u64 (sa->rspi);
506 /* calculate PRFplus */
508 int len = tr_prf->key_trunc + /* SK_d */
509 integ_key_len * 2 + /* SK_ai, SK_ar */
510 tr_encr->key_len * 2 + /* SK_ei, SK_er */
511 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
514 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
521 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
522 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
523 pos += tr_prf->key_trunc;
528 sa->sk_ai = vec_new (u8, integ_key_len);
529 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
530 pos += integ_key_len;
533 sa->sk_ar = vec_new (u8, integ_key_len);
534 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
535 pos += integ_key_len;
539 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
540 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
541 pos += tr_encr->key_len + salt_len;
544 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
545 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
546 pos += tr_encr->key_len + salt_len;
549 sa->sk_pi = vec_new (u8, tr_prf->key_len);
550 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
551 pos += tr_prf->key_len;
554 sa->sk_pr = vec_new (u8, tr_prf->key_len);
555 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
556 pos += tr_prf->key_len;
559 sa->keys_generated = 1;
563 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
566 u16 integ_key_len = 0;
569 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
571 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
573 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
575 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
578 integ_key_len = ctr_integ->key_len;
580 salt_len = sizeof (u32);
582 vec_append (s, sa->i_nonce);
583 vec_append (s, sa->r_nonce);
584 /* calculate PRFplus */
586 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
588 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
593 child->sk_ei = vec_new (u8, ctr_encr->key_len);
594 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
595 pos += ctr_encr->key_len;
600 child->sk_ai = vec_new (u8, ctr_integ->key_len);
601 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
602 pos += ctr_integ->key_len;
606 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
611 child->sk_er = vec_new (u8, ctr_encr->key_len);
612 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
613 pos += ctr_encr->key_len;
618 child->sk_ar = vec_new (u8, integ_key_len);
619 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
620 pos += integ_key_len;
624 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
633 static_always_inline u8 *
634 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, ip_address_t * ia, u16 port)
636 const u32 max_buf_size =
637 sizeof (ispi) + sizeof (rspi) + sizeof (ip6_address_t) + sizeof (u16);
638 u8 buf[max_buf_size];
639 u8 *res = vec_new (u8, 20);
641 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
642 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
643 clib_memcpy_fast (&buf[8 + 8], ip_addr_bytes (ia), ip_address_size (ia));
644 clib_memcpy_fast (&buf[8 + 8 + ip_address_size (ia)], &port, sizeof (port));
645 SHA1 (buf, 2 * sizeof (ispi) + sizeof (port) + ip_address_size (ia), res);
650 ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa,
653 const ike_ke_payload_header_t *ke = p;
654 u16 plen = clib_net_to_host_u16 (ke->length);
655 ASSERT (plen >= sizeof (*ke) && plen <= rlen);
656 if (sizeof (*ke) > rlen)
659 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
660 vec_reset_length (ke_data[0]);
661 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
666 ikev2_parse_nonce_payload (const void *p, u32 rlen, u8 * nonce)
668 const ike_payload_header_t *ikep = p;
669 u16 plen = clib_net_to_host_u16 (ikep->length);
670 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
671 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
676 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
679 if (sizeof (*ikep) > rlen)
681 *plen = clib_net_to_host_u16 (ikep->length);
682 if (*plen < sizeof (*ikep) || *plen > rlen)
688 ikev2_process_sa_init_req (vlib_main_t * vm,
689 ikev2_sa_t * sa, ike_header_t * ike,
690 udp_header_t * udp, u32 len)
692 u8 nonce[IKEV2_NONCE_SIZE];
694 u8 payload = ike->nextpayload;
695 ike_payload_header_t *ikep;
698 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
699 "from ", clib_net_to_host_u64 (ike->ispi),
700 clib_net_to_host_u64 (ike->rspi),
701 ip_addr_v4 (&sa->iaddr).as_u32,
702 ip_addr_version (&sa->iaddr) == AF_IP4);
704 sa->ispi = clib_net_to_host_u64 (ike->ispi);
706 /* store whole IKE payload - needed for PSK auth */
707 vec_reset_length (sa->last_sa_init_req_packet_data);
708 vec_add (sa->last_sa_init_req_packet_data, ike, len);
710 if (len < sizeof (*ike))
713 len -= sizeof (*ike);
714 while (p < len && payload != IKEV2_PAYLOAD_NONE)
716 ikep = (ike_payload_header_t *) & ike->payload[p];
717 int current_length = len - p;
718 if (!ikev2_check_payload_length (ikep, current_length, &plen))
721 if (payload == IKEV2_PAYLOAD_SA)
723 ikev2_sa_free_proposal_vector (&sa->i_proposals);
724 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
726 else if (payload == IKEV2_PAYLOAD_KE)
728 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
732 else if (payload == IKEV2_PAYLOAD_NONCE)
734 vec_reset_length (sa->i_nonce);
735 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
736 vec_add (sa->i_nonce, nonce, plen - sizeof (*ikep));
738 else if (payload == IKEV2_PAYLOAD_NOTIFY)
741 ikev2_parse_notify_payload (ikep, current_length);
742 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
744 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr,
746 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
748 if (sa->natt_state == IKEV2_NATT_ENABLED)
749 sa->natt_state = IKEV2_NATT_ACTIVE;
750 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
751 " behind NAT", sa->ispi);
755 else if (n->msg_type ==
756 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
758 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->raddr,
760 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
762 if (sa->natt_state == IKEV2_NATT_ENABLED)
763 sa->natt_state = IKEV2_NATT_ACTIVE;
764 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
765 " (self) behind NAT", sa->ispi);
771 else if (payload == IKEV2_PAYLOAD_VENDOR)
773 ikev2_parse_vendor_payload (ikep);
777 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
779 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
781 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
782 sa->unsupported_cp = payload;
787 payload = ikep->nextpayload;
791 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
796 ikev2_process_sa_init_resp (vlib_main_t * vm,
797 ikev2_sa_t * sa, ike_header_t * ike,
798 udp_header_t * udp, u32 len)
800 u8 nonce[IKEV2_NONCE_SIZE];
802 u8 payload = ike->nextpayload;
803 ike_payload_header_t *ikep;
806 sa->ispi = clib_net_to_host_u64 (ike->ispi);
807 sa->rspi = clib_net_to_host_u64 (ike->rspi);
809 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
810 "from ", sa->ispi, sa->rspi,
811 ip_addr_v4 (&sa->raddr).as_u32,
812 ip_addr_version (&sa->raddr) == AF_IP4);
814 /* store whole IKE payload - needed for PSK auth */
815 vec_reset_length (sa->last_sa_init_res_packet_data);
816 vec_add (sa->last_sa_init_res_packet_data, ike, len);
818 if (sizeof (*ike) > len)
821 len -= sizeof (*ike);
822 while (p < len && payload != IKEV2_PAYLOAD_NONE)
824 int current_length = len - p;
825 ikep = (ike_payload_header_t *) & ike->payload[p];
826 if (!ikev2_check_payload_length (ikep, current_length, &plen))
829 if (payload == IKEV2_PAYLOAD_SA)
831 ikev2_sa_free_proposal_vector (&sa->r_proposals);
832 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
835 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
837 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
840 else if (payload == IKEV2_PAYLOAD_KE)
842 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
846 else if (payload == IKEV2_PAYLOAD_NONCE)
848 vec_reset_length (sa->r_nonce);
849 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
850 vec_add (sa->r_nonce, nonce, plen - sizeof (*ikep));
852 else if (payload == IKEV2_PAYLOAD_NOTIFY)
855 ikev2_parse_notify_payload (ikep, current_length);
856 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
858 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
861 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
863 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
864 " behind NAT, unsupported", sa->ispi);
868 else if (n->msg_type ==
869 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
871 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
874 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
876 if (sa->natt_state == IKEV2_NATT_ENABLED)
877 sa->natt_state = IKEV2_NATT_ACTIVE;
878 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
879 " (self) behind NAT", sa->ispi);
885 else if (payload == IKEV2_PAYLOAD_VENDOR)
887 ikev2_parse_vendor_payload (ikep);
891 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
893 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
895 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
896 sa->unsupported_cp = payload;
901 payload = ikep->nextpayload;
907 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
908 u8 * payload, u32 rlen, u32 * out_len)
910 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
912 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
913 ike_payload_header_t *ikep = 0;
916 ikev2_sa_transform_t *tr_integ;
917 ikev2_sa_transform_t *tr_encr;
919 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
921 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
922 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
924 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
927 if (rlen <= sizeof (*ike))
930 int len = rlen - sizeof (*ike);
932 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
934 ikep = (ike_payload_header_t *) & ike->payload[p];
935 int current_length = len - p;
936 if (!ikev2_check_payload_length (ikep, current_length, &plen))
939 if (*payload == IKEV2_PAYLOAD_SK)
941 last_payload = *payload;
945 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
947 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
949 sa->unsupported_cp = *payload;
954 *payload = ikep->nextpayload;
958 if (last_payload != IKEV2_PAYLOAD_SK)
960 ikev2_elog_error ("Last payload must be SK");
966 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
969 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
970 u8 *aad = (u8 *) ike;
971 u32 aad_len = ikep->payload - aad;
972 u8 *tag = ikep->payload + plen;
974 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
975 plen, aad, aad_len, tag, &dlen);
979 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
984 if (rlen < tr_integ->key_trunc)
988 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
989 (u8 *) ike, rlen - tr_integ->key_trunc);
991 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
994 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
996 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
998 ikev2_elog_error ("message integrity check failed");
1004 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1009 plaintext = ikep->payload + tr_encr->block_size;
1016 static_always_inline int
1017 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
1019 if (i1->type != i2->type)
1022 if (vec_len (i1->data) != vec_len (i2->data))
1025 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1032 ikev2_initial_contact_cleanup_internal (ikev2_main_per_thread_data_t * ptd,
1035 ikev2_main_t *km = &ikev2_main;
1038 ikev2_child_sa_t *c;
1040 /* find old IKE SAs with the same authenticated identity */
1042 pool_foreach (tmp, ptd->sas, ({
1043 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1044 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1047 if (sa->rspi != tmp->rspi)
1048 vec_add1(delete, tmp - ptd->sas);
1052 for (i = 0; i < vec_len (delete); i++)
1054 tmp = pool_elt_at_index (ptd->sas, delete[i]);
1055 vec_foreach (c, tmp->childs)
1057 ikev2_delete_tunnel_interface (km->vnet_main, tmp, c);
1059 ikev2_delete_sa (ptd, tmp);
1063 sa->initial_contact = 0;
1067 ikev2_initial_contact_cleanup (ikev2_main_per_thread_data_t * ptd,
1070 ikev2_main_t *km = &ikev2_main;
1072 if (!sa->initial_contact)
1077 ikev2_initial_contact_cleanup_internal (ptd, sa);
1081 vec_foreach (ptd, km->per_thread_data)
1082 ikev2_initial_contact_cleanup_internal (ptd, sa);
1084 sa->initial_contact = 0;
1088 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1090 const ike_id_payload_header_t *id = p;
1091 u16 plen = clib_net_to_host_u16 (id->length);
1092 if (plen < sizeof (*id) || plen > rlen)
1095 sa_id->type = id->id_type;
1096 vec_reset_length (sa_id->data);
1097 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1103 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1105 const ike_auth_payload_header_t *ah = p;
1106 u16 plen = clib_net_to_host_u16 (ah->length);
1108 a->method = ah->auth_method;
1109 vec_reset_length (a->data);
1110 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1115 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1116 ike_header_t * ike, u32 len)
1119 ikev2_child_sa_t *first_child_sa;
1120 u8 payload = ike->nextpayload;
1122 ike_payload_header_t *ikep;
1126 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1127 "from ", clib_host_to_net_u64 (ike->ispi),
1128 clib_host_to_net_u64 (ike->rspi),
1130 ip_addr_v4 (&sa->raddr).as_u32 :
1131 ip_addr_v4 (&sa->iaddr).as_u32,
1132 ip_addr_version (&sa->raddr) == AF_IP4);
1134 ikev2_calc_keys (sa);
1136 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1140 if (sa->unsupported_cp)
1142 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1148 /* select or create 1st child SA */
1149 if (sa->is_initiator)
1151 first_child_sa = &sa->childs[0];
1155 ikev2_sa_free_all_child_sa (&sa->childs);
1156 vec_add2 (sa->childs, first_child_sa, 1);
1160 /* process encrypted payload */
1161 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1163 ikep = (ike_payload_header_t *) & plaintext[p];
1164 int current_length = dlen - p;
1165 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1168 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1170 if (sa->is_initiator)
1172 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1173 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1178 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1179 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1183 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1185 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1188 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1190 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1193 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1195 if (sa->is_initiator)
1197 if (!ikev2_parse_auth_payload (ikep, current_length,
1203 if (!ikev2_parse_auth_payload (ikep, current_length,
1208 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1211 ikev2_parse_notify_payload (ikep, current_length);
1212 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1214 sa->initial_contact = 1;
1218 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1220 ikev2_parse_vendor_payload (ikep);
1222 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1224 vec_free (first_child_sa->tsi);
1225 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1227 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1229 vec_free (first_child_sa->tsr);
1230 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1234 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1237 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1239 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1240 sa->unsupported_cp = payload;
1245 payload = ikep->nextpayload;
1252 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1257 ikev2_process_informational_req (vlib_main_t * vm,
1258 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1261 u8 payload = ike->nextpayload;
1263 ike_payload_header_t *ikep;
1265 ikev2_notify_t *n = 0;
1267 sa->liveness_retries = 0;
1268 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1269 "from ", clib_host_to_net_u64 (ike->ispi),
1270 clib_host_to_net_u64 (ike->rspi),
1271 ip_addr_v4 (&sa->iaddr).as_u32,
1272 ip_addr_version (&sa->iaddr) == AF_IP4);
1274 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1279 /* process encrypted payload */
1281 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1283 u32 current_length = dlen - p;
1284 if (p + sizeof (*ikep) > dlen)
1287 ikep = (ike_payload_header_t *) & plaintext[p];
1288 u16 plen = clib_net_to_host_u16 (ikep->length);
1290 if (plen < sizeof (*ikep) || plen > current_length)
1293 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1295 n = ikev2_parse_notify_payload (ikep, current_length);
1298 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1299 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1302 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1304 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1306 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1308 ikev2_parse_vendor_payload (ikep);
1312 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1314 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1316 sa->unsupported_cp = payload;
1320 payload = ikep->nextpayload;
1327 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1328 ikev2_sa_t * sa, ike_header_t * ike,
1332 u8 payload = ike->nextpayload;
1335 u8 nonce[IKEV2_NONCE_SIZE];
1337 ike_payload_header_t *ikep;
1338 ikev2_notify_t *n = 0;
1339 ikev2_ts_t *tsi = 0;
1340 ikev2_ts_t *tsr = 0;
1341 ikev2_sa_proposal_t *proposal = 0;
1342 ikev2_child_sa_t *child_sa;
1346 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1347 "from ", clib_host_to_net_u64 (ike->ispi),
1348 clib_host_to_net_u64 (ike->rspi),
1349 ip_addr_v4 (&sa->raddr).as_u32,
1350 ip_addr_version (&sa->raddr) == AF_IP4);
1352 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1355 goto cleanup_and_exit;
1357 /* process encrypted payload */
1359 while (payload != IKEV2_PAYLOAD_NONE)
1361 ikep = (ike_payload_header_t *) & plaintext[p];
1362 int current_length = dlen - p;
1363 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1364 goto cleanup_and_exit;
1366 if (payload == IKEV2_PAYLOAD_SA)
1368 proposal = ikev2_parse_sa_payload (ikep, current_length);
1370 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1372 n = ikev2_parse_notify_payload (ikep, current_length);
1373 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1378 else if (payload == IKEV2_PAYLOAD_DELETE)
1380 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1382 else if (payload == IKEV2_PAYLOAD_VENDOR)
1384 ikev2_parse_vendor_payload (ikep);
1386 else if (payload == IKEV2_PAYLOAD_NONCE)
1388 ikev2_parse_nonce_payload (ikep, current_length, nonce);
1390 else if (payload == IKEV2_PAYLOAD_TSI)
1392 tsi = ikev2_parse_ts_payload (ikep, current_length);
1394 else if (payload == IKEV2_PAYLOAD_TSR)
1396 tsr = ikev2_parse_ts_payload (ikep, current_length);
1400 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1402 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1404 sa->unsupported_cp = payload;
1405 goto cleanup_and_exit;
1408 payload = ikep->nextpayload;
1412 if (sa->is_initiator && proposal
1413 && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1415 ikev2_rekey_t *rekey = &sa->rekey[0];
1416 rekey->protocol_id = proposal->protocol_id;
1418 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1419 rekey->i_proposal->spi = rekey->spi;
1420 rekey->r_proposal = proposal;
1424 vec_reset_length (sa->r_nonce);
1425 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1426 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1429 child_sa->rekey_retries = 0;
1434 ikev2_rekey_t *rekey;
1435 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1438 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1440 goto cleanup_and_exit;
1442 vec_add2 (sa->rekey, rekey, 1);
1443 rekey->protocol_id = n->protocol_id;
1444 rekey->spi = n->spi;
1445 rekey->i_proposal = proposal;
1447 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1451 vec_reset_length (sa->i_nonce);
1452 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1453 /* generate new Nr */
1454 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1455 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1458 goto cleanup_and_exit;
1464 vec_free (proposal);
1471 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1479 ikev2_sa_transform_t *tr_prf;
1482 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1488 nonce = sa->i_nonce;
1489 packet_data = sa->last_sa_init_res_packet_data;
1495 nonce = sa->r_nonce;
1496 packet_data = sa->last_sa_init_req_packet_data;
1499 data = vec_new (u8, 4);
1501 vec_append (data, id->data);
1503 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1504 vec_append (authmsg, packet_data);
1505 vec_append (authmsg, nonce);
1506 vec_append (authmsg, id_hash);
1514 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1516 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1517 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1518 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1519 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1526 ikev2_sa_match_ts (ikev2_sa_t * sa)
1528 ikev2_main_t *km = &ikev2_main;
1530 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1531 ikev2_id_t *id_rem, *id_loc;
1534 pool_foreach (p, km->profiles, ({
1536 if (sa->is_initiator)
1552 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1553 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1556 sa->profile_index = p - km->profiles;
1558 vec_foreach(ts, sa->childs[0].tsi)
1560 if (ikev2_ts_cmp(p_tsi, ts))
1562 vec_add1 (tsi, ts[0]);
1567 vec_foreach(ts, sa->childs[0].tsr)
1569 if (ikev2_ts_cmp(p_tsr, ts))
1571 vec_add1 (tsr, ts[0]);
1582 vec_free (sa->childs[0].tsi);
1583 vec_free (sa->childs[0].tsr);
1584 sa->childs[0].tsi = tsi;
1585 sa->childs[0].tsr = tsr;
1591 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1596 ikev2_sa_auth (ikev2_sa_t * sa)
1598 ikev2_main_t *km = &ikev2_main;
1599 ikev2_profile_t *p, *sel_p = 0;
1600 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1601 ikev2_sa_transform_t *tr_prf;
1604 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1606 /* only shared key and rsa signature */
1607 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1608 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1610 ikev2_elog_uint (IKEV2_LOG_ERROR,
1611 "unsupported authentication method %u",
1613 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1617 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1618 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1620 ikev2_id_t *id_rem, *id_loc;
1621 ikev2_auth_t *sa_auth;
1623 if (sa->is_initiator)
1627 sa_auth = &sa->r_auth;
1633 sa_auth = &sa->i_auth;
1637 pool_foreach (p, km->profiles, ({
1640 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1641 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1644 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1646 if (!p->auth.data ||
1647 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1650 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1651 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1653 if (!clib_memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1655 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1662 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1664 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1667 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1669 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1682 sa->udp_encap = sel_p->udp_encap;
1683 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1687 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1689 if (!sa->is_initiator)
1691 vec_free (sa->r_id.data);
1692 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1693 sa->r_id.type = sel_p->loc_id.type;
1694 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1695 sa->i_id.type = sel_p->rem_id.type;
1697 /* generate our auth data */
1698 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1699 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1701 vec_free (sa->r_auth.data);
1702 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1703 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1705 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1707 vec_free (sa->r_auth.data);
1708 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1709 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1713 /* select transforms for 1st child sa */
1714 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1715 sa->childs[0].r_proposals =
1716 ikev2_select_proposal (sa->childs[0].i_proposals,
1717 IKEV2_PROTOCOL_ESP);
1719 if (~0 != sel_p->tun_itf)
1721 sa->is_tun_itf_set = 1;
1722 sa->tun_itf = sel_p->tun_itf;
1728 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1729 "profile found! ispi %lx", sa->ispi);
1730 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1738 ikev2_sa_auth_init (ikev2_sa_t * sa)
1740 ikev2_main_t *km = &ikev2_main;
1741 u8 *authmsg, *key_pad, *psk = 0;
1742 ikev2_sa_transform_t *tr_prf;
1745 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1747 /* only shared key and rsa signature */
1748 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1749 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1751 ikev2_elog_uint (IKEV2_LOG_ERROR,
1752 "unsupported authentication method %u",
1754 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1758 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1759 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1760 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1762 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1764 vec_free (sa->i_auth.data);
1765 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1766 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1768 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1770 vec_free (sa->i_auth.data);
1771 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1772 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1781 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1783 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1787 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1789 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1799 ipsec_sa_flags_t flags;
1802 ipsec_crypto_alg_t encr_type;
1803 ipsec_integ_alg_t integ_type;
1804 ip46_address_t local_ip;
1805 ip46_address_t remote_ip;
1806 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1808 u32 old_remote_sa_id;
1809 u16 ipsec_over_udp_port;
1812 } ikev2_add_ipsec_tunnel_args_t;
1815 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1817 ikev2_main_t *km = &ikev2_main;
1821 if (~0 == a->sw_if_index)
1823 /* no tunnel associated with the SA/profile - create a new one */
1824 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1825 &a->local_ip, &a->remote_ip, 0,
1826 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1827 TUNNEL_MODE_P2P, &sw_if_index);
1829 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1831 if (hash_get (km->sw_if_indices, sw_if_index))
1832 /* interface is managed by IKE; proceed with updating SAs */
1835 hash_set1 (km->sw_if_indices, sw_if_index);
1839 sw_if_index = a->sw_if_index;
1840 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1845 ikev2_elog_uint (IKEV2_LOG_ERROR,
1846 "installing ipip tunnel failed! local spi: %x",
1852 vec_add1 (sas_in, a->remote_sa_id);
1855 ipsec_tun_protect_del (sw_if_index, NULL);
1857 /* replace local SA immediately */
1858 ipsec_sa_unlock_id (a->local_sa_id);
1860 /* keep the old sa */
1861 vec_add1 (sas_in, a->old_remote_sa_id);
1864 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1866 IPSEC_PROTOCOL_ESP, a->encr_type,
1867 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1868 a->flags, 0, a->salt_local, &a->local_ip,
1869 &a->remote_ip, TUNNEL_ENCAP_DECAP_FLAG_NONE,
1870 IP_DSCP_CS0, NULL, a->src_port, a->dst_port);
1872 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1873 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1874 a->integ_type, &a->rem_ikey,
1875 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1876 a->salt_remote, &a->remote_ip,
1877 &a->local_ip, TUNNEL_ENCAP_DECAP_FLAG_NONE,
1879 a->ipsec_over_udp_port,
1880 a->ipsec_over_udp_port);
1882 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1886 ikev2_create_tunnel_interface (vlib_main_t * vm,
1888 ikev2_child_sa_t * child, u32 sa_index,
1889 u32 child_index, u8 is_rekey)
1891 u32 thread_index = vlib_get_thread_index ();
1892 ikev2_main_t *km = &ikev2_main;
1893 ipsec_crypto_alg_t encr_type;
1894 ipsec_integ_alg_t integ_type;
1895 ikev2_profile_t *p = 0;
1896 ikev2_sa_transform_t *tr;
1897 ikev2_sa_proposal_t *proposals;
1899 ikev2_add_ipsec_tunnel_args_t a;
1901 clib_memset (&a, 0, sizeof (a));
1903 if (!child->r_proposals)
1905 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1909 if (sa->is_initiator)
1911 ip_address_to_46 (&sa->iaddr, &a.local_ip);
1912 ip_address_to_46 (&sa->raddr, &a.remote_ip);
1913 proposals = child->r_proposals;
1914 a.local_spi = child->r_proposals[0].spi;
1915 a.remote_spi = child->i_proposals[0].spi;
1919 ip_address_to_46 (&sa->raddr, &a.local_ip);
1920 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
1921 proposals = child->i_proposals;
1922 a.local_spi = child->i_proposals[0].spi;
1923 a.remote_spi = child->r_proposals[0].spi;
1926 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1929 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1930 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1932 if (ikev2_natt_active (sa))
1933 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1934 a.is_rekey = is_rekey;
1936 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1937 if (tr && tr->esn_type)
1938 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1940 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1943 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1945 switch (tr->key_len)
1948 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1951 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1954 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1957 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1962 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1965 switch (tr->key_len)
1968 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1971 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1974 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1977 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1985 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1991 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1994 a.encr_type = encr_type;
1998 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2001 switch (tr->integ_type)
2003 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
2004 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
2006 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
2007 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
2009 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
2010 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
2012 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
2013 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2016 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2022 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2028 integ_type = IPSEC_INTEG_ALG_NONE;
2031 a.integ_type = integ_type;
2032 ikev2_calc_child_keys (sa, child);
2034 if (sa->is_initiator)
2036 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2037 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2038 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2039 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2042 a.salt_remote = child->salt_er;
2043 a.salt_local = child->salt_ei;
2045 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2049 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2050 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2051 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2052 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2055 a.salt_remote = child->salt_ei;
2056 a.salt_local = child->salt_er;
2059 ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port;
2060 a.src_port = sa->ipsec_over_udp_port;
2063 if (sa->is_initiator && sa->profile_index != ~0)
2064 p = pool_elt_at_index (km->profiles, sa->profile_index);
2066 if (p && p->lifetime)
2068 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2069 if (p->lifetime_jitter)
2071 // This is not much better than rand(3), which Coverity warns
2072 // is unsuitable for security applications; random_u32 is
2073 // however fast. If this perturbance to the expiration time
2074 // needs to use a better RNG then we may need to use something
2075 // like /dev/urandom which has significant overhead.
2076 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2077 rnd = random_u32 (&rnd);
2079 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2083 if (thread_index & 0xffffffc0)
2084 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2086 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2087 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2089 child->local_sa_id =
2091 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2093 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2098 /* create a new remote SA ID to keep the old SA for a bit longer
2099 * so the peer has some time to swap their SAs */
2101 /* use most significat bit of child index part in id */
2103 if (sa->current_remote_id_mask)
2105 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2106 sa->current_remote_id_mask = 0;
2110 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2111 sa->current_remote_id_mask = mask;
2112 remote_sa_id |= mask;
2114 sa->old_id_expiration = 3.0;
2115 sa->old_remote_id_present = 1;
2118 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2120 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2121 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2123 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2124 (u8 *) & a, sizeof (a));
2130 ip46_address_t local_ip;
2131 ip46_address_t remote_ip;
2135 } ikev2_del_ipsec_tunnel_args_t;
2137 static_always_inline u32
2138 ikev2_flip_alternate_sa_bit (u32 id)
2147 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2149 ikev2_main_t *km = &ikev2_main;
2150 ipip_tunnel_t *ipip = NULL;
2153 if (~0 == a->sw_if_index)
2156 ipip_tunnel_key_t key = {
2158 .dst = a->remote_ip,
2159 .transport = IPIP_TRANSPORT_IP4,
2164 ipip = ipip_tunnel_db_find (&key);
2168 sw_if_index = ipip->sw_if_index;
2169 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2176 sw_if_index = a->sw_if_index;
2177 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2180 if (~0 != sw_if_index)
2181 ipsec_tun_protect_del (sw_if_index, NULL);
2183 ipsec_sa_unlock_id (a->remote_sa_id);
2184 ipsec_sa_unlock_id (a->local_sa_id);
2185 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2188 ipip_del_tunnel (ipip->sw_if_index);
2192 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2193 ikev2_child_sa_t * child)
2195 ikev2_del_ipsec_tunnel_args_t a;
2197 clib_memset (&a, 0, sizeof (a));
2199 if (sa->is_initiator)
2201 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2202 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2206 ip_address_to_46 (&sa->raddr, &a.local_ip);
2207 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2210 a.remote_sa_id = child->remote_sa_id;
2211 a.local_sa_id = child->local_sa_id;
2212 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2214 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2220 ikev2_generate_message (vlib_buffer_t * b, ikev2_sa_t * sa,
2221 ike_header_t * ike, void *user, udp_header_t * udp)
2223 ikev2_main_t *km = &ikev2_main;
2224 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2226 ike_payload_header_t *ph;
2230 ikev2_sa_transform_t *tr_encr, *tr_integ;
2232 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2234 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2236 ikev2_payload_chain_t *chain = 0;
2237 ikev2_payload_new_chain (chain);
2239 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2241 if (sa->r_proposals == 0)
2243 ikev2_payload_add_notify (chain,
2244 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2245 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2247 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2249 u8 *data = vec_new (u8, 2);
2250 ikev2_sa_transform_t *tr_dh;
2252 ikev2_sa_get_td_for_type (sa->r_proposals,
2253 IKEV2_TRANSFORM_TYPE_DH);
2254 ASSERT (tr_dh && tr_dh->dh_type);
2256 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2257 data[1] = (tr_dh->dh_type) & 0xff;
2259 ikev2_payload_add_notify (chain,
2260 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2263 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2265 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2267 u8 *data = vec_new (u8, 1);
2269 data[0] = sa->unsupported_cp;
2270 ikev2_payload_add_notify (chain,
2271 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2279 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2280 ikev2_payload_add_sa (chain, sa->r_proposals);
2281 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2282 ikev2_payload_add_nonce (chain, sa->r_nonce);
2284 u8 *nat_detection_sha1 =
2285 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2286 clib_host_to_net_u64 (sa->rspi),
2287 &sa->raddr, udp->dst_port);
2288 ikev2_payload_add_notify (chain,
2289 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2290 nat_detection_sha1);
2291 vec_free (nat_detection_sha1);
2292 nat_detection_sha1 =
2293 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2294 clib_host_to_net_u64 (sa->rspi),
2295 &sa->iaddr, udp->src_port);
2296 ikev2_payload_add_notify (chain,
2297 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2298 nat_detection_sha1);
2299 vec_free (nat_detection_sha1);
2302 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2304 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2306 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2307 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2308 ikev2_payload_add_auth (chain, &sa->r_auth);
2309 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2310 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2311 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2313 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2315 ikev2_payload_add_notify (chain,
2316 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2318 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2320 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2322 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2324 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2325 ikev2_payload_add_auth (chain, &sa->r_auth);
2327 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2329 ikev2_payload_add_notify (chain,
2330 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2331 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2332 ikev2_payload_add_auth (chain, &sa->r_auth);
2333 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2334 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2336 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2338 u8 *data = vec_new (u8, 1);
2340 data[0] = sa->unsupported_cp;
2341 ikev2_payload_add_notify (chain,
2342 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2346 else if (sa->state == IKEV2_STATE_SA_INIT)
2348 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2349 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2350 ikev2_payload_add_auth (chain, &sa->i_auth);
2351 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2352 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2353 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2354 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2359 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2363 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2365 /* if pending delete */
2368 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2370 if (ike_hdr_is_request (ike))
2371 ikev2_payload_add_delete (chain, sa->del);
2373 /* The response to a request that deletes the IKE SA is an empty
2374 INFORMATIONAL response. */
2375 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2377 /* The response to a request that deletes ESP or AH SAs will contain
2378 delete payloads for the paired SAs going in the other direction. */
2381 ikev2_payload_add_delete (chain, sa->del);
2386 /* received N(AUTHENTICATION_FAILED) */
2387 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2389 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2392 /* received unsupported critical payload */
2393 else if (sa->unsupported_cp)
2395 u8 *data = vec_new (u8, 1);
2397 data[0] = sa->unsupported_cp;
2398 ikev2_payload_add_notify (chain,
2399 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2402 sa->unsupported_cp = 0;
2404 /* else send empty response */
2406 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2408 if (sa->is_initiator)
2411 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2412 ikev2_notify_t notify;
2413 u8 *data = vec_new (u8, 4);
2414 clib_memset (¬ify, 0, sizeof (notify));
2415 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2416 notify.spi = sa->childs[0].i_proposals->spi;
2417 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2419 ikev2_payload_add_sa (chain, proposals);
2420 ikev2_payload_add_nonce (chain, sa->i_nonce);
2421 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2422 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2423 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2430 if (vec_len (sa->rekey) > 0)
2432 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2433 ikev2_payload_add_nonce (chain, sa->r_nonce);
2434 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2436 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2438 vec_del1 (sa->rekey, 0);
2440 else if (sa->unsupported_cp)
2442 u8 *data = vec_new (u8, 1);
2444 data[0] = sa->unsupported_cp;
2445 ikev2_payload_add_notify (chain,
2446 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2449 sa->unsupported_cp = 0;
2453 ikev2_payload_add_notify (chain,
2454 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2461 ike->version = IKE_VERSION_2;
2462 ike->nextpayload = IKEV2_PAYLOAD_SK;
2463 tlen = sizeof (*ike);
2465 if (sa->is_initiator)
2466 ike->flags |= IKEV2_HDR_FLAG_INITIATOR;
2468 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2470 tlen += vec_len (chain->data);
2471 ike->nextpayload = chain->first_payload_type;
2472 ike->length = clib_host_to_net_u32 (tlen);
2474 if (tlen + b->current_length + b->current_data > buffer_data_size)
2480 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2482 /* store whole IKE payload - needed for PSK auth */
2483 vec_reset_length (sa->last_sa_init_res_packet_data);
2484 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2488 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2489 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2492 plen = sizeof (*ph);
2493 ph = (ike_payload_header_t *) & ike->payload[0];
2494 ph->nextpayload = chain->first_payload_type;
2497 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2498 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2499 plen += vec_len (chain->data) + iv_len;
2501 /* add space for hmac/tag */
2503 plen += tr_integ->key_trunc;
2505 plen += IKEV2_GCM_ICV_SIZE;
2508 if (tlen + b->current_length + b->current_data > buffer_data_size)
2514 /* payload and total length */
2515 ph->length = clib_host_to_net_u16 (plen);
2516 ike->length = clib_host_to_net_u32 (tlen);
2520 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2521 ph->payload, (u8 *) ike,
2522 sizeof (*ike) + sizeof (*ph),
2523 ph->payload + plen - sizeof (*ph) -
2524 IKEV2_GCM_ICV_SIZE))
2532 if (!ikev2_encrypt_data
2533 (ptd, sa, tr_encr, chain->data, ph->payload))
2539 ikev2_calc_integr (tr_integ,
2540 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2541 (u8 *) ike, tlen - tr_integ->key_trunc);
2542 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2543 sizeof (*ike), integ, tr_integ->key_trunc);
2546 /* store whole IKE payload - needed for retransmit */
2547 vec_reset_length (sa->last_res_packet_data);
2548 vec_add (sa->last_res_packet_data, ike, tlen);
2552 ikev2_payload_destroy_chain (chain);
2558 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2559 ip_address_t iaddr, ip_address_t raddr,
2564 u8 payload = ike->nextpayload;
2566 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2567 ip_address_cmp (&sa->iaddr, &iaddr) ||
2568 ip_address_cmp (&sa->raddr, &raddr))
2573 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2575 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2576 u32 plen = clib_net_to_host_u16 (ikep->length);
2578 if (plen < sizeof (ike_payload_header_t))
2581 if (payload == IKEV2_PAYLOAD_NONCE &&
2582 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2584 /* req is retransmit */
2585 if (sa->state == IKEV2_STATE_SA_INIT)
2587 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2588 u32 slen = clib_net_to_host_u32 (tmp->length);
2589 ike->ispi = tmp->ispi;
2590 ike->rspi = tmp->rspi;
2591 ike->nextpayload = tmp->nextpayload;
2592 ike->version = tmp->version;
2593 ike->exchange = tmp->exchange;
2594 ike->flags = tmp->flags;
2595 ike->msgid = tmp->msgid;
2596 ike->length = tmp->length;
2597 clib_memcpy_fast (ike->payload, tmp->payload,
2598 slen - sizeof (*ike));
2599 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2600 "ispi %lx IKE_SA_INIT retransmit "
2601 "from %d.%d.%d.%d to %d.%d.%d.%d",
2603 ip_addr_v4 (&raddr).as_u32,
2604 ip_addr_v4 (&iaddr).as_u32);
2607 /* else ignore req */
2610 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2611 "ispi %lx IKE_SA_INIT ignore "
2612 "from %d.%d.%d.%d to %d.%d.%d.%d",
2614 ip_addr_v4 (&raddr).as_u32,
2615 ip_addr_v4 (&iaddr).as_u32);
2619 payload = ikep->nextpayload;
2627 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2628 ip_address_t raddr, u32 rlen)
2632 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2635 pool_foreach (sa, ptd->sas, ({
2636 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2642 /* req is not retransmit */
2647 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2649 if (ike_hdr_is_response (ike))
2652 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2655 if (msg_id > sa->last_msg_id)
2657 sa->last_msg_id = msg_id;
2661 /* retransmitted req */
2662 if (msg_id == sa->last_msg_id)
2664 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2665 u32 slen = clib_net_to_host_u32 (tmp->length);
2666 ike->ispi = tmp->ispi;
2667 ike->rspi = tmp->rspi;
2668 ike->nextpayload = tmp->nextpayload;
2669 ike->version = tmp->version;
2670 ike->exchange = tmp->exchange;
2671 ike->flags = tmp->flags;
2672 ike->msgid = tmp->msgid;
2673 ike->length = tmp->length;
2674 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2675 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2676 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2677 ip_addr_v4 (&sa->iaddr).as_u32);
2681 /* old req ignore */
2682 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2683 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2684 ip_addr_v4 (&sa->iaddr).as_u32);
2689 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2691 ikev2_main_t *km = &ikev2_main;
2692 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2693 sa->profile_index = ~0;
2697 ikev2_del_sa_init_from_main (u64 * ispi)
2699 ikev2_main_t *km = &ikev2_main;
2700 uword *p = hash_get (km->sa_by_ispi, *ispi);
2703 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2704 hash_unset (km->sa_by_ispi, sai->ispi);
2705 ikev2_sa_free_all_vec (sai);
2706 pool_put (km->sais, sai);
2711 ikev2_del_sa_init (u64 ispi)
2713 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2717 static_always_inline void
2718 ikev2_rewrite_v6_addrs (ikev2_sa_t * sa, ip6_header_t * ih)
2720 if (sa->is_initiator)
2722 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2723 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2727 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2728 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2732 static_always_inline void
2733 ikev2_rewrite_v4_addrs (ikev2_sa_t * sa, ip4_header_t * ih)
2735 if (sa->is_initiator)
2737 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2738 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2742 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2743 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2747 static_always_inline void
2748 ikev2_set_ip_address (ikev2_sa_t * sa, const void *iaddr,
2749 const void *raddr, const int af)
2751 ip_address_set (&sa->raddr, raddr, af);
2752 ip_address_set (&sa->iaddr, iaddr, af);
2756 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2757 ip6_header_t * ip6, u8 is_ip4)
2762 src = ip4->src_address.as_u32;
2763 dst = ip4->dst_address.as_u32;
2767 src = ip6->src_address.as_u32[3];
2768 dst = ip6->dst_address.as_u32[3];
2770 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2771 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2772 exchange, src, dst);
2775 static_always_inline uword
2776 ikev2_node_internal (vlib_main_t * vm,
2777 vlib_node_runtime_t * node, vlib_frame_t * frame,
2780 u32 n_left = frame->n_vectors, *from;
2781 ikev2_main_t *km = &ikev2_main;
2782 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2783 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2784 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2787 from = vlib_frame_vector_args (frame);
2788 vlib_get_buffers (vm, from, bufs, n_left);
2793 vlib_buffer_t *b0 = b[0];
2794 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2795 : IKEV2_NEXT_IP6_ERROR_DROP;
2796 ip4_header_t *ip40 = 0;
2797 ip6_header_t *ip60 = 0;
2800 ikev2_sa_t *sa0 = 0;
2801 ikev2_sa_t sa; /* temporary store for SA */
2804 int is_req = 0, has_non_esp_marker = 0;
2806 if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2808 u8 *ptr = vlib_buffer_get_current (b0);
2809 ip40 = (ip4_header_t *) ptr;
2810 ptr += sizeof (*ip40);
2811 udp0 = (udp_header_t *) ptr;
2812 ptr += sizeof (*udp0);
2813 ike0 = (ike_header_t *) ptr;
2814 ip_hdr_sz = sizeof (*ip40);
2818 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2819 ike0 = vlib_buffer_get_current (b0);
2820 vlib_buffer_advance (b0, -sizeof (*udp0));
2821 udp0 = vlib_buffer_get_current (b0);
2825 ip40 = (ip4_header_t *) ipx_hdr;
2826 ip_hdr_sz = sizeof (*ip40);
2830 ip60 = (ip6_header_t *) ipx_hdr;
2831 ip_hdr_sz = sizeof (*ip60);
2833 vlib_buffer_advance (b0, -ip_hdr_sz);
2836 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2838 /* check for non-esp marker */
2839 if (*((u32 *) ike0) == 0)
2842 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2843 rlen -= sizeof (ikev2_non_esp_marker);
2844 has_non_esp_marker = 1;
2847 if (clib_net_to_host_u32 (ike0->length) != rlen)
2849 vlib_node_increment_counter (vm, node->node_index,
2850 IKEV2_ERROR_BAD_LENGTH, 1);
2854 if (ike0->version != IKE_VERSION_2)
2856 vlib_node_increment_counter (vm, node->node_index,
2857 IKEV2_ERROR_NOT_IKEV2, 1);
2861 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2864 clib_memset (sa0, 0, sizeof (*sa0));
2866 if (ike_hdr_is_initiator (ike0))
2868 if (ike0->rspi == 0)
2871 ikev2_set_ip_address (sa0, &ip40->src_address,
2872 &ip40->dst_address, AF_IP4);
2874 ikev2_set_ip_address (sa0, &ip60->src_address,
2875 &ip60->dst_address, AF_IP6);
2877 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2880 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2884 vlib_node_increment_counter (vm, node->node_index,
2887 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2889 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2894 res = ikev2_process_sa_init_req (vm, sa0, ike0, udp0, rlen);
2896 vlib_node_increment_counter (vm, node->node_index,
2897 IKEV2_ERROR_MALFORMED_PACKET,
2900 if (sa0->state == IKEV2_STATE_SA_INIT)
2902 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2904 ikev2_select_proposal (sa0->i_proposals,
2905 IKEV2_PROTOCOL_IKE);
2906 ikev2_generate_sa_init_data (sa0);
2909 if (sa0->state == IKEV2_STATE_SA_INIT
2910 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2912 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
2913 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2915 vlib_node_increment_counter (vm, node->node_index,
2916 IKEV2_ERROR_NO_BUFF_SPACE,
2920 if (sa0->state == IKEV2_STATE_SA_INIT)
2922 /* add SA to the pool */
2923 pool_get (ptd->sas, sa0);
2924 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2925 ikev2_init_sa (vm, sa0);
2926 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2930 ikev2_sa_free_all_vec (sa0);
2934 else //received sa_init without initiator flag
2937 ikev2_set_ip_address (sa0, &ip40->dst_address,
2938 &ip40->src_address, AF_IP4);
2940 ikev2_set_ip_address (sa0, &ip60->dst_address,
2941 &ip60->src_address, AF_IP6);
2943 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
2945 if (sa0->state == IKEV2_STATE_SA_INIT)
2948 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2949 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
2952 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2954 if (clib_atomic_bool_cmp_and_swap
2955 (&sai->init_response_received, 0, 1))
2957 ikev2_complete_sa_data (sa0, sai);
2958 ikev2_calc_keys (sa0);
2959 ikev2_sa_auth_init (sa0);
2960 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
2962 clib_net_to_host_u32 (sai->last_init_msg_id);
2963 sa0->last_init_msg_id = sai->last_init_msg_id + 1;
2965 ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2967 vlib_node_increment_counter (vm,
2969 IKEV2_ERROR_NO_BUFF_SPACE,
2974 /* we've already processed sa-init response */
2975 sa0->state = IKEV2_STATE_UNKNOWN;
2980 if (sa0->state == IKEV2_STATE_SA_INIT)
2982 /* add SA to the pool */
2983 pool_get (ptd->sas, sa0);
2984 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2985 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2989 ikev2_sa_free_all_vec (sa0);
2993 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2996 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
2999 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3000 slen = ikev2_retransmit_resp (sa0, ike0);
3003 vlib_node_increment_counter (vm, node->node_index,
3006 IKEV2_ERROR_IKE_REQ_IGNORE
3008 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3013 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3014 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3016 ikev2_sa_auth (sa0);
3018 vlib_node_increment_counter (vm, node->node_index,
3019 IKEV2_ERROR_MALFORMED_PACKET, 1);
3020 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3022 ikev2_initial_contact_cleanup (ptd, sa0);
3023 ikev2_sa_match_ts (sa0);
3024 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3025 ikev2_create_tunnel_interface (vm, sa0,
3030 if (sa0->is_initiator)
3032 ikev2_del_sa_init (sa0->ispi);
3036 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3037 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3039 vlib_node_increment_counter (vm, node->node_index,
3040 IKEV2_ERROR_NO_BUFF_SPACE,
3045 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3048 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3051 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3052 slen = ikev2_retransmit_resp (sa0, ike0);
3055 vlib_node_increment_counter (vm, node->node_index,
3058 IKEV2_ERROR_IKE_REQ_IGNORE
3060 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3065 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3068 vlib_node_increment_counter (vm, node->node_index,
3069 IKEV2_ERROR_MALFORMED_PACKET,
3077 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3079 ikev2_delete_t *d, *tmp, *resp = 0;
3080 vec_foreach (d, sa0->del)
3082 ikev2_child_sa_t *ch_sa;
3083 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3085 !sa0->is_initiator);
3088 ikev2_delete_tunnel_interface (km->vnet_main,
3090 if (!sa0->is_initiator)
3092 vec_add2 (resp, tmp, 1);
3093 tmp->protocol_id = d->protocol_id;
3094 tmp->spi = ch_sa->r_proposals[0].spi;
3096 ikev2_sa_del_child_sa (sa0, ch_sa);
3099 if (!sa0->is_initiator)
3101 vec_free (sa0->del);
3106 if (ike_hdr_is_request (ike0))
3108 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3109 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3111 vlib_node_increment_counter (vm, node->node_index,
3112 IKEV2_ERROR_NO_BUFF_SPACE,
3117 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3120 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3123 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3124 slen = ikev2_retransmit_resp (sa0, ike0);
3127 vlib_node_increment_counter (vm, node->node_index,
3130 IKEV2_ERROR_IKE_REQ_IGNORE
3132 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3137 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3140 vlib_node_increment_counter (vm, node->node_index,
3141 IKEV2_ERROR_MALFORMED_PACKET,
3149 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3152 ikev2_sa_free_all_child_sa (&sa0->childs);
3153 ikev2_child_sa_t *child;
3154 vec_add2 (sa0->childs, child, 1);
3155 clib_memset (child, 0, sizeof (*child));
3156 child->r_proposals = sa0->rekey[0].r_proposal;
3157 child->i_proposals = sa0->rekey[0].i_proposal;
3158 child->tsi = sa0->rekey[0].tsi;
3159 child->tsr = sa0->rekey[0].tsr;
3160 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3161 child - sa0->childs, 1);
3163 if (ike_hdr_is_response (ike0))
3165 vec_free (sa0->rekey);
3169 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3170 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3172 vlib_node_increment_counter (vm, node->node_index,
3173 IKEV2_ERROR_NO_BUFF_SPACE,
3181 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3185 /* if we are sending packet back, rewrite headers */
3186 if (slen && ~0 != slen)
3190 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3191 ikev2_rewrite_v4_addrs (sa0, ip40);
3195 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3196 ikev2_rewrite_v6_addrs (sa0, ip60);
3201 udp0->dst_port = udp0->src_port =
3202 clib_net_to_host_u16 (ikev2_get_port (sa0));
3204 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3205 && ikev2_natt_active (sa0))
3207 if (!has_non_esp_marker)
3208 slen = ikev2_insert_non_esp_marker (ike0, slen);
3213 if (has_non_esp_marker)
3214 slen += sizeof (ikev2_non_esp_marker);
3216 u16 tp = udp0->dst_port;
3217 udp0->dst_port = udp0->src_port;
3218 udp0->src_port = tp;
3221 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3223 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3226 ip40->length = clib_host_to_net_u16 (b0->current_length);
3227 ip40->checksum = ip4_header_checksum (ip40);
3231 ip60->payload_length =
3232 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3236 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3237 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3239 ikev2_child_sa_t *c;
3241 vec_foreach (c, sa0->childs)
3242 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3244 ikev2_delete_sa (ptd, sa0);
3246 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3247 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3250 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3251 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3252 t->next_index = next[0];
3259 vlib_node_increment_counter (vm, node->node_index,
3260 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3261 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3262 return frame->n_vectors;
3266 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3268 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */ );
3272 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3274 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */ );
3278 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3279 .function = ikev2_ip4,
3280 .name = "ikev2-ip4",
3281 .vector_size = sizeof (u32),
3282 .format_trace = format_ikev2_trace,
3283 .type = VLIB_NODE_TYPE_INTERNAL,
3285 .n_errors = ARRAY_LEN(ikev2_error_strings),
3286 .error_strings = ikev2_error_strings,
3288 .n_next_nodes = IKEV2_IP4_N_NEXT,
3290 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3291 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3295 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3296 .function = ikev2_ip6,
3297 .name = "ikev2-ip6",
3298 .vector_size = sizeof (u32),
3299 .format_trace = format_ikev2_trace,
3300 .type = VLIB_NODE_TYPE_INTERNAL,
3302 .n_errors = ARRAY_LEN(ikev2_error_strings),
3303 .error_strings = ikev2_error_strings,
3305 .n_next_nodes = IKEV2_IP6_N_NEXT,
3307 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3308 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3313 // set ikev2 proposals when vpp is used as initiator
3314 static clib_error_t *
3315 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3316 ikev2_transforms_set * ts,
3317 ikev2_sa_proposal_t ** proposals, int is_ike)
3320 ikev2_main_t *km = &ikev2_main;
3321 ikev2_sa_proposal_t *proposal;
3322 vec_add2 (*proposals, proposal, 1);
3323 ikev2_sa_transform_t *td;
3328 vec_foreach (td, km->supported_transforms)
3330 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3331 && td->encr_type == ts->crypto_alg
3332 && td->key_len == ts->crypto_key_size / 8)
3335 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3336 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3337 vec_add (td->attrs, (u8 *) attr, 4);
3338 vec_add1 (proposal->transforms, *td);
3347 r = clib_error_return (0, "Unsupported algorithm");
3351 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3355 vec_foreach (td, km->supported_transforms)
3357 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3358 && td->integ_type == ts->integ_alg)
3360 vec_add1 (proposal->transforms, *td);
3368 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3369 r = clib_error_return (0, "Unsupported algorithm");
3378 vec_foreach (td, km->supported_transforms)
3380 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3381 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3383 vec_add1 (proposal->transforms, *td);
3390 r = clib_error_return (0, "Unsupported algorithm");
3399 vec_foreach (td, km->supported_transforms)
3401 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3403 vec_add1 (proposal->transforms, *td);
3406 sa->dh_group = td->dh_type;
3414 r = clib_error_return (0, "Unsupported algorithm");
3422 vec_foreach (td, km->supported_transforms)
3424 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3426 vec_add1 (proposal->transforms, *td);
3432 r = clib_error_return (0, "Unsupported algorithm");
3441 static ikev2_profile_t *
3442 ikev2_profile_index_by_name (u8 * name)
3444 ikev2_main_t *km = &ikev2_main;
3447 p = mhash_get (&km->profile_index_by_name, name);
3451 return pool_elt_at_index (km->profiles, p[0]);
3456 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3457 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3466 b0 = vlib_get_buffer (vm, bi0);
3467 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3468 udp0 = vlib_buffer_get_current (b0);
3469 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3470 udp0->src_port = clib_host_to_net_u16 (src_port);
3471 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3474 if (ip_addr_version (dst) == AF_IP4)
3476 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3477 ip40 = vlib_buffer_get_current (b0);
3478 ip40->ip_version_and_header_length = 0x45;
3480 ip40->fragment_id = 0;
3481 ip40->flags_and_fragment_offset = 0;
3483 ip40->protocol = IP_PROTOCOL_UDP;
3484 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3485 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3486 b0->current_length =
3487 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3488 ip40->length = clib_host_to_net_u16 (b0->current_length);
3489 ip40->checksum = ip4_header_checksum (ip40);
3493 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3494 ip60 = vlib_buffer_get_current (b0);
3496 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3497 ip60->ip_version_traffic_class_and_flow_label =
3498 clib_host_to_net_u32 (0x6 << 28);
3499 ip60->payload_length =
3500 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3501 ip60->protocol = IP_PROTOCOL_UDP;
3502 ip60->hop_limit = 0xff;
3503 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3504 sizeof (ip60->src_address));
3505 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3506 sizeof (ip60->src_address));
3509 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3510 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3511 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3513 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3514 ip4_lookup_node.index : ip6_lookup_node.index;
3516 /* send the request */
3517 f = vlib_get_frame_to_node (vm, next_index);
3518 to_next = vlib_frame_vector_args (f);
3521 vlib_put_frame_to_node (vm, next_index, f);
3526 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3529 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3534 *b = vlib_get_buffer (vm, bi0);
3539 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3541 ikev2_main_t *km = &ikev2_main;
3544 EVP_PKEY_free (km->pkey);
3545 km->pkey = ikev2_load_key_file (file);
3546 if (km->pkey == NULL)
3547 return clib_error_return (0, "load key '%s' failed", file);
3552 static_always_inline vnet_api_error_t
3553 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3555 ikev2_main_t *km = &ikev2_main;
3556 udp_dst_port_info_t *pi;
3558 uword *v = hash_get (km->udp_ports, port);
3559 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3563 /* IKE already uses this port, only increment reference counter */
3570 return VNET_API_ERROR_UDP_PORT_TAKEN;
3572 udp_register_dst_port (km->vlib_main, port,
3573 ipsec4_tun_input_node.index, 1);
3574 hash_set (km->udp_ports, port, 1);
3576 p->ipsec_over_udp_port = port;
3580 static_always_inline void
3581 ikev2_unregister_udp_port (ikev2_profile_t * p)
3583 ikev2_main_t *km = &ikev2_main;
3586 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3589 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3597 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3598 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3601 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3605 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3606 ikev2_main_per_thread_data_t * tkm,
3607 ikev2_sa_t * sa, u8 send_notification)
3609 ikev2_main_t *km = &ikev2_main;
3610 ip_address_t *src, *dst;
3612 ikev2_child_sa_t *c;
3614 /* Create the Initiator notification for IKE SA removal */
3619 vec_resize (sa->del, 1);
3620 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3621 sa->del->spi = sa->ispi;
3623 if (send_notification)
3625 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3628 ikev2_log_error ("buffer alloc failure");
3632 ike0 = vlib_buffer_get_current (b0);
3633 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3634 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3635 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3637 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
3638 sa->last_init_msg_id += 1;
3639 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
3643 if (ikev2_natt_active (sa))
3644 len = ikev2_insert_non_esp_marker (ike0, len);
3646 if (sa->is_initiator)
3657 ikev2_send_ike (vm, src, dst, bi0, len,
3658 ikev2_get_port (sa), sa->dst_port, 0);
3662 /* delete local SA */
3663 vec_foreach (c, sa->childs)
3664 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3666 u64 rspi = sa->rspi;
3667 ikev2_sa_free_all_vec (sa);
3668 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3671 hash_unset (tkm->sa_by_rspi, rspi);
3672 pool_put (tkm->sas, sa);
3677 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3679 ikev2_main_per_thread_data_t *tkm;
3681 u32 pi = p - km->profiles;
3686 pool_foreach(sa, km->sais, ({
3687 if (pi == sa->profile_index)
3688 vec_add1 (del_sai, sa - km->sais);
3692 vec_foreach (sai, del_sai)
3694 sa = pool_elt_at_index (km->sais, sai[0]);
3695 ikev2_sa_free_all_vec (sa);
3696 hash_unset (km->sa_by_ispi, sa->ispi);
3697 pool_put (km->sais, sa);
3699 vec_reset_length (del_sai);
3701 vec_foreach (tkm, km->per_thread_data)
3704 pool_foreach (sa, tkm->sas, ({
3705 if (sa->profile_index != ~0 && pi == sa->profile_index)
3706 vec_add1 (del_sai, sa - tkm->sas);
3710 vec_foreach (sai, del_sai)
3712 sa = pool_elt_at_index (tkm->sas, sai[0]);
3713 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1);
3716 vec_reset_length (del_sai);
3723 ikev2_profile_free (ikev2_profile_t * p)
3727 vec_free (p->auth.data);
3729 EVP_PKEY_free (p->auth.key);
3731 vec_free (p->loc_id.data);
3732 vec_free (p->rem_id.data);
3736 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3738 ikev2_main_t *km = &ikev2_main;
3743 if (ikev2_profile_index_by_name (name))
3744 return clib_error_return (0, "policy %v already exists", name);
3746 pool_get (km->profiles, p);
3747 clib_memset (p, 0, sizeof (*p));
3748 p->name = vec_dup (name);
3749 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3750 p->responder.sw_if_index = ~0;
3752 uword index = p - km->profiles;
3753 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3757 p = ikev2_profile_index_by_name (name);
3759 return clib_error_return (0, "policy %v does not exists", name);
3761 ikev2_unregister_udp_port (p);
3762 ikev2_cleanup_profile_sessions (km, p);
3764 ikev2_profile_free (p);
3765 pool_put (km->profiles, p);
3766 mhash_unset (&km->profile_index_by_name, name, 0);
3772 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3773 u8 * auth_data, u8 data_hex_format)
3778 p = ikev2_profile_index_by_name (name);
3782 r = clib_error_return (0, "unknown profile %v", name);
3787 EVP_PKEY_free (p->auth.key);
3788 vec_free (p->auth.data);
3790 p->auth.method = auth_method;
3791 p->auth.data = vec_dup (auth_data);
3792 p->auth.hex = data_hex_format;
3794 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3796 vec_add1 (p->auth.data, 0);
3797 p->auth.key = ikev2_load_cert_file (p->auth.data);
3798 if (p->auth.key == NULL)
3799 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3806 ikev2_is_id_supported (u8 id_type)
3808 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
3809 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
3810 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
3811 id_type == IKEV2_ID_TYPE_ID_FQDN);
3815 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3821 if (!ikev2_is_id_supported (id_type))
3823 r = clib_error_return (0, "unsupported identity type %U",
3824 format_ikev2_id_type, id_type);
3828 p = ikev2_profile_index_by_name (name);
3832 r = clib_error_return (0, "unknown profile %v", name);
3838 vec_free (p->loc_id.data);
3839 p->loc_id.type = id_type;
3840 p->loc_id.data = vec_dup (data);
3844 vec_free (p->rem_id.data);
3845 p->rem_id.type = id_type;
3846 p->rem_id.data = vec_dup (data);
3852 static_always_inline void
3853 ikev2_set_ts_type (ikev2_ts_t * ts, const ip_address_t * addr)
3855 if (ip_addr_version (addr) == AF_IP4)
3856 ts->ts_type = TS_IPV4_ADDR_RANGE;
3858 ts->ts_type = TS_IPV6_ADDR_RANGE;
3861 static_always_inline void
3862 ikev2_set_ts_addrs (ikev2_ts_t * ts, const ip_address_t * start,
3863 const ip_address_t * end)
3865 ip_address_copy (&ts->start_addr, start);
3866 ip_address_copy (&ts->end_addr, end);
3870 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3871 u16 start_port, u16 end_port, ip_address_t start_addr,
3872 ip_address_t end_addr, int is_local)
3877 p = ikev2_profile_index_by_name (name);
3881 r = clib_error_return (0, "unknown profile %v", name);
3885 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
3886 return clib_error_return (0, "IP address version mismatch!");
3890 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
3891 p->loc_ts.start_port = start_port;
3892 p->loc_ts.end_port = end_port;
3893 p->loc_ts.protocol_id = protocol_id;
3894 ikev2_set_ts_type (&p->loc_ts, &start_addr);
3898 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
3899 p->rem_ts.start_port = start_port;
3900 p->rem_ts.end_port = end_port;
3901 p->rem_ts.protocol_id = protocol_id;
3902 ikev2_set_ts_type (&p->rem_ts, &start_addr);
3910 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3911 u32 sw_if_index, ip_address_t addr)
3916 p = ikev2_profile_index_by_name (name);
3920 r = clib_error_return (0, "unknown profile %v", name);
3924 p->responder.sw_if_index = sw_if_index;
3925 ip_address_copy (&p->responder.addr, &addr);
3931 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3932 ikev2_transform_encr_type_t crypto_alg,
3933 ikev2_transform_integ_type_t integ_alg,
3934 ikev2_transform_dh_type_t dh_type,
3935 u32 crypto_key_size)
3940 p = ikev2_profile_index_by_name (name);
3944 r = clib_error_return (0, "unknown profile %v", name);
3948 p->ike_ts.crypto_alg = crypto_alg;
3949 p->ike_ts.integ_alg = integ_alg;
3950 p->ike_ts.dh_type = dh_type;
3951 p->ike_ts.crypto_key_size = crypto_key_size;
3956 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3957 ikev2_transform_encr_type_t crypto_alg,
3958 ikev2_transform_integ_type_t integ_alg,
3959 u32 crypto_key_size)
3964 p = ikev2_profile_index_by_name (name);
3968 r = clib_error_return (0, "unknown profile %v", name);
3972 p->esp_ts.crypto_alg = crypto_alg;
3973 p->esp_ts.integ_alg = integ_alg;
3974 p->esp_ts.crypto_key_size = crypto_key_size;
3979 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3980 u8 * name, u32 sw_if_index)
3985 p = ikev2_profile_index_by_name (name);
3989 r = clib_error_return (0, "unknown profile %v", name);
3993 p->tun_itf = sw_if_index;
3999 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
4002 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4003 ikev2_main_t *km = &ikev2_main;
4004 vnet_api_error_t rv = 0;
4008 return VNET_API_ERROR_INVALID_VALUE;
4012 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
4013 return VNET_API_ERROR_VALUE_EXIST;
4015 rv = ikev2_register_udp_port (p, port);
4019 v = hash_get (km->udp_ports, port);
4021 return VNET_API_ERROR_IKE_NO_PORT;
4023 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4024 return VNET_API_ERROR_INVALID_VALUE;
4026 ikev2_unregister_udp_port (p);
4032 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4034 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4039 r = clib_error_return (0, "unknown profile %v", name);
4048 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4049 u64 lifetime, u32 jitter, u32 handover,
4055 p = ikev2_profile_index_by_name (name);
4059 r = clib_error_return (0, "unknown profile %v", name);
4063 p->lifetime = lifetime;
4064 p->lifetime_jitter = jitter;
4065 p->handover = handover;
4066 p->lifetime_maxdata = maxdata;
4071 ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af,
4072 ip_address_t * out_addr)
4074 ip4_address_t *if_ip4;
4075 ip6_address_t *if_ip6;
4079 if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
4082 ip_address_set (out_addr, if_ip4, AF_IP4);
4088 if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index);
4091 ip_address_set (out_addr, if_ip6, AF_IP6);
4099 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4103 ikev2_main_t *km = &ikev2_main;
4107 int len = sizeof (ike_header_t), valid_ip = 0;
4108 ip_address_t if_ip = ip_address_initializer;
4110 p = ikev2_profile_index_by_name (name);
4114 r = clib_error_return (0, "unknown profile %v", name);
4118 if (p->responder.sw_if_index == ~0
4119 || ip_address_is_zero (&p->responder.addr))
4121 r = clib_error_return (0, "responder not set for profile %v", name);
4125 if (ikev2_get_if_address (p->responder.sw_if_index,
4126 ip_addr_version (&p->responder.addr), &if_ip))
4131 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4134 char *errmsg = "buffer alloc failure";
4135 ikev2_log_error (errmsg);
4136 return clib_error_return (0, errmsg);
4138 ike0 = vlib_buffer_get_current (b0);
4140 /* Prepare the SA and the IKE payload */
4142 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4143 ikev2_payload_chain_t *chain = 0;
4144 ikev2_payload_new_chain (chain);
4146 /* Build the IKE proposal payload */
4147 ikev2_sa_proposal_t *proposals = 0;
4148 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4149 proposals[0].proposal_num = 1;
4150 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4152 /* Add and then cleanup proposal data */
4153 ikev2_payload_add_sa (chain, proposals);
4154 ikev2_sa_free_proposal_vector (&proposals);
4156 sa.is_initiator = 1;
4157 sa.profile_index = p - km->profiles;
4158 sa.state = IKEV2_STATE_SA_INIT;
4159 sa.tun_itf = p->tun_itf;
4160 sa.udp_encap = p->udp_encap;
4161 if (p->natt_disabled)
4162 sa.natt_state = IKEV2_NATT_DISABLED;
4163 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4164 sa.is_tun_itf_set = 1;
4165 sa.initial_contact = 1;
4166 sa.dst_port = IKEV2_PORT;
4167 ikev2_generate_sa_init_data (&sa);
4168 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4169 ikev2_payload_add_nonce (chain, sa.i_nonce);
4171 /* Build the child SA proposal */
4172 vec_resize (sa.childs, 1);
4173 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4174 &sa.childs[0].i_proposals, 0);
4175 sa.childs[0].i_proposals[0].proposal_num = 1;
4176 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4177 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4178 sizeof (sa.childs[0].i_proposals[0].spi));
4180 /* Add NAT detection notification messages (mandatory) */
4181 u8 *nat_detection_sha1 =
4182 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4183 clib_host_to_net_u64 (sa.rspi),
4184 &if_ip, clib_host_to_net_u16 (IKEV2_PORT));
4186 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4187 nat_detection_sha1);
4188 vec_free (nat_detection_sha1);
4189 nat_detection_sha1 =
4190 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4191 clib_host_to_net_u64 (sa.rspi),
4193 clib_host_to_net_u16 (sa.dst_port));
4194 ikev2_payload_add_notify (chain,
4195 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4196 nat_detection_sha1);
4197 vec_free (nat_detection_sha1);
4199 u8 *sig_hash_algo = vec_new (u8, 8);
4200 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4201 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4202 ikev2_payload_add_notify (chain,
4203 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4205 vec_free (sig_hash_algo);
4207 /* Buffer update and boilerplate */
4208 len += vec_len (chain->data);
4209 ike0->nextpayload = chain->first_payload_type;
4210 ike0->length = clib_host_to_net_u32 (len);
4211 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4212 ikev2_payload_destroy_chain (chain);
4214 ike0->version = IKE_VERSION_2;
4215 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4216 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4217 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4220 sa.last_init_msg_id += 1;
4222 /* store whole IKE payload - needed for PSK auth */
4223 vec_reset_length (sa.last_sa_init_req_packet_data);
4224 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4226 /* add data to the SA then add it to the pool */
4227 ip_address_copy (&sa.iaddr, &if_ip);
4228 ip_address_copy (&sa.raddr, &p->responder.addr);
4229 sa.i_id.type = p->loc_id.type;
4230 sa.i_id.data = vec_dup (p->loc_id.data);
4231 sa.r_id.type = p->rem_id.type;
4232 sa.r_id.data = vec_dup (p->rem_id.data);
4233 sa.i_auth.method = p->auth.method;
4234 sa.i_auth.hex = p->auth.hex;
4235 sa.i_auth.data = vec_dup (p->auth.data);
4236 sa.sw_if_index = p->responder.sw_if_index;
4237 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4238 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4240 ikev2_initial_contact_cleanup (0, &sa);
4242 /* add SA to the pool */
4243 ikev2_sa_t *sa0 = 0;
4244 pool_get (km->sais, sa0);
4245 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4246 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4250 ikev2_send_ike (vm, &if_ip, &p->responder.addr, bi0, len,
4251 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
4254 ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4255 clib_host_to_net_u64 (sa0->ispi), 0,
4256 ip_addr_v4 (&p->responder.addr).as_u32,
4257 ip_addr_version (&p->responder.addr) == AF_IP4);
4262 clib_error_return (0, "interface %U does not have any IP address!",
4263 format_vnet_sw_if_index_name, vnet_get_main (),
4264 p->responder.sw_if_index);
4272 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4273 ikev2_child_sa_t * csa)
4275 /* Create the Initiator notification for child SA removal */
4276 ikev2_main_t *km = &ikev2_main;
4282 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4285 ikev2_log_error ("buffer alloc failure");
4289 ike0 = vlib_buffer_get_current (b0);
4290 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4291 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4292 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4294 vec_resize (sa->del, 1);
4295 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4296 sa->del->spi = csa->i_proposals->spi;
4297 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4298 sa->last_init_msg_id += 1;
4299 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4303 if (ikev2_natt_active (sa))
4304 len = ikev2_insert_non_esp_marker (ike0, len);
4305 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4306 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4308 /* delete local child SA */
4309 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4310 ikev2_sa_del_child_sa (sa, csa);
4314 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4317 ikev2_main_t *km = &ikev2_main;
4318 ikev2_main_per_thread_data_t *tkm;
4319 ikev2_sa_t *fsa = 0;
4320 ikev2_child_sa_t *fchild = 0;
4322 /* Search for the child SA */
4323 vec_foreach (tkm, km->per_thread_data)
4329 pool_foreach (sa, tkm->sas, ({
4330 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4340 if (!fchild || !fsa)
4342 r = clib_error_return (0, "Child SA not found");
4347 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4354 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4357 ikev2_main_t *km = &ikev2_main;
4358 ikev2_main_per_thread_data_t *tkm;
4359 ikev2_sa_t *fsa = 0;
4360 ikev2_main_per_thread_data_t *ftkm = 0;
4362 /* Search for the IKE SA */
4363 vec_foreach (tkm, km->per_thread_data)
4369 pool_foreach (sa, tkm->sas, ({
4370 if (sa->ispi == ispi)
4382 r = clib_error_return (0, "IKE SA not found");
4386 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1);
4391 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4392 ikev2_child_sa_t * csa)
4394 /* Create the Initiator request for create child SA */
4400 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4403 ikev2_log_error ("buffer alloc failure");
4407 ike0 = vlib_buffer_get_current (b0);
4408 ike0->version = IKE_VERSION_2;
4409 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4410 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4411 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4412 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4413 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4414 sa->last_init_msg_id += 1;
4416 ikev2_rekey_t *rekey;
4417 vec_add2 (sa->rekey, rekey, 1);
4418 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4421 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4422 rekey->spi = proposals[0].spi;
4423 rekey->ispi = csa->i_proposals->spi;
4424 len = ikev2_generate_message (b0, sa, ike0, proposals, 0);
4428 if (ikev2_natt_active (sa))
4429 len = ikev2_insert_non_esp_marker (ike0, len);
4430 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4431 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4432 vec_free (proposals);
4436 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4439 ikev2_main_t *km = &ikev2_main;
4440 ikev2_main_per_thread_data_t *tkm;
4441 ikev2_sa_t *fsa = 0;
4442 ikev2_child_sa_t *fchild = 0;
4444 /* Search for the child SA */
4445 vec_foreach (tkm, km->per_thread_data)
4451 pool_foreach (sa, tkm->sas, ({
4452 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4462 if (!fchild || !fsa)
4464 r = clib_error_return (0, "Child SA not found");
4469 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4476 ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index)
4478 return (sa->sw_if_index == sw_if_index) && sa->is_initiator;
4482 ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index)
4484 u64 *ispi, *ispi_vec = 0;
4485 ikev2_sa_t *sa, **sap, **sa_vec = 0;
4486 ikev2_main_t *km = &ikev2_main;
4487 ikev2_main_per_thread_data_t *tkm;
4488 p->responder.sw_if_index = ~0;
4490 vec_foreach (tkm, km->per_thread_data)
4493 pool_foreach (sa, tkm->sas, ({
4494 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4495 vec_add1 (sa_vec, sa);
4499 vec_foreach (sap, sa_vec)
4501 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0);
4503 vec_reset_length (sa_vec);
4508 pool_foreach (sa, km->sais, ({
4509 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4510 vec_add1 (ispi_vec, sa->ispi);
4514 vec_foreach (ispi, ispi_vec)
4516 ikev2_del_sa_init_from_main (ispi);
4519 vec_free (ispi_vec);
4522 static clib_error_t *
4523 ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
4525 ikev2_main_t *km = &ikev2_main;
4532 pool_foreach (p, km->profiles, ({
4533 if (p->responder.sw_if_index == sw_if_index)
4534 ikev2_sa_del (p, sw_if_index);
4541 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del);
4544 ikev2_init (vlib_main_t * vm)
4546 ikev2_main_t *km = &ikev2_main;
4547 vlib_thread_main_t *tm = vlib_get_thread_main ();
4550 clib_memset (km, 0, sizeof (ikev2_main_t));
4551 km->vnet_main = vnet_get_main ();
4554 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4555 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4556 ikev2_crypto_init (km);
4558 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4560 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4561 CLIB_CACHE_LINE_BYTES);
4562 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4564 ikev2_main_per_thread_data_t *ptd =
4565 vec_elt_at_index (km->per_thread_data, thread_id);
4567 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4569 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4570 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4571 ptd->hmac_ctx = HMAC_CTX_new ();
4573 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4574 ptd->evp_ctx = &ptd->_evp_ctx;
4575 HMAC_CTX_init (&(ptd->_hmac_ctx));
4576 ptd->hmac_ctx = &ptd->_hmac_ctx;
4580 km->sa_by_ispi = hash_create (0, sizeof (uword));
4581 km->sw_if_indices = hash_create (0, 0);
4582 km->udp_ports = hash_create (0, sizeof (uword));
4584 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4585 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4586 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4587 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4589 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4");
4590 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4592 ikev2_cli_reference ();
4594 km->log_level = IKEV2_LOG_ERROR;
4595 km->log_class = vlib_log_register_class ("ikev2", 0);
4600 VLIB_INIT_FUNCTION (ikev2_init) =
4602 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4607 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4610 ikev2_main_t *km = &ikev2_main;
4611 ikev2_profile_t *p = 0;
4612 vlib_main_t *vm = km->vlib_main;
4613 f64 now = vlib_time_now (vm);
4616 if (sa->profile_index != ~0)
4617 p = pool_elt_at_index (km->profiles, sa->profile_index);
4619 if (sa->is_initiator && p && csa->time_to_expiration
4620 && now > csa->time_to_expiration)
4622 if (!csa->is_expired || csa->rekey_retries > 0)
4624 ikev2_rekey_child_sa_internal (vm, sa, csa);
4625 csa->time_to_expiration = now + p->handover;
4626 csa->is_expired = 1;
4627 if (csa->rekey_retries == 0)
4629 csa->rekey_retries = 5;
4631 else if (csa->rekey_retries > 0)
4633 csa->rekey_retries--;
4634 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4635 csa->i_proposals->spi, csa->rekey_retries);
4636 if (csa->rekey_retries == 0)
4638 csa->rekey_retries = -1;
4645 csa->time_to_expiration = 0;
4646 ikev2_delete_child_sa_internal (vm, sa, csa);
4654 ipip_tunnel_t *ipip = NULL;
4655 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4656 if (~0 == sw_if_index)
4658 ip46_address_t local_ip;
4659 ip46_address_t remote_ip;
4660 if (sa->is_initiator)
4662 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4663 ip_addr_bytes (&sa->iaddr));
4664 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4665 ip_addr_bytes (&sa->raddr));
4669 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4670 ip_addr_bytes (&sa->raddr));
4671 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4672 ip_addr_bytes (&sa->iaddr));
4676 ipip_tunnel_key_t key = {
4679 .transport = IPIP_TRANSPORT_IP4,
4684 ipip = ipip_tunnel_db_find (&key);
4687 sw_if_index = ipip->sw_if_index;
4693 vec_add1 (sas_in, csa->remote_sa_id);
4694 vlib_worker_thread_barrier_sync (vm);
4695 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
4696 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4697 vlib_worker_thread_barrier_release (vm);
4704 ikev2_set_log_level (ikev2_log_level_t log_level)
4706 ikev2_main_t *km = &ikev2_main;
4708 if (log_level >= IKEV2_LOG_MAX)
4710 ikev2_log_error ("unknown logging level %d", log_level);
4714 km->log_level = log_level;
4719 ikev2_set_liveness_params (u32 period, u32 max_retries)
4721 ikev2_main_t *km = &ikev2_main;
4723 if (period == 0 || max_retries == 0)
4724 return clib_error_return (0, "invalid args");
4726 km->liveness_period = period;
4727 km->liveness_max_retries = max_retries;
4732 ikev2_profile_natt_disable (u8 * name)
4734 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4736 return clib_error_return (0, "unknown profile %v", name);
4738 p->natt_disabled = 1;
4743 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4745 ikev2_main_t *km = &ikev2_main;
4746 vlib_main_t *vm = km->vlib_main;
4747 ikev2_main_per_thread_data_t *tkm;
4748 ikev2_sa_t *fsa = 0;
4749 ikev2_profile_t *p = 0;
4750 ikev2_child_sa_t *fchild = 0;
4751 f64 now = vlib_time_now (vm);
4752 vlib_counter_t counts;
4754 /* Search for the SA and child SA */
4755 vec_foreach (tkm, km->per_thread_data)
4761 pool_foreach (sa, tkm->sas, ({
4762 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4771 vlib_get_combined_counter (&ipsec_sa_counters,
4772 ipsec_sa->stat_index, &counts);
4774 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4775 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4777 if (fchild && p && p->lifetime_maxdata)
4779 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4781 fchild->time_to_expiration = now;
4787 ikev2_process_pending_sa_init_one (ikev2_main_t * km, ikev2_sa_t * sa)
4793 if (ip_address_is_zero (&sa->iaddr))
4795 p = pool_elt_at_index (km->profiles, sa->profile_index);
4796 if (!ikev2_get_if_address (p->responder.sw_if_index,
4797 ip_addr_version (&p->responder.addr),
4801 /* update NAT detection payload */
4803 ikev2_find_ike_notify_payload
4804 ((ike_header_t *) sa->last_sa_init_req_packet_data,
4805 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP);
4809 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
4810 clib_host_to_net_u64 (sa->rspi),
4812 clib_host_to_net_u16 (IKEV2_PORT));
4813 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
4818 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4821 vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0);
4822 clib_memcpy_fast (vlib_buffer_get_current (b),
4823 sa->last_sa_init_req_packet_data,
4824 vec_len (sa->last_sa_init_req_packet_data));
4826 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4827 vec_len (sa->last_sa_init_req_packet_data),
4828 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4832 ikev2_process_pending_sa_init (ikev2_main_t * km)
4839 hash_foreach (ispi, sai, km->sa_by_ispi,
4841 sa = pool_elt_at_index (km->sais, sai);
4842 if (sa->init_response_received)
4845 ikev2_process_pending_sa_init_one (km, sa);
4851 ikev2_send_informational_request (ikev2_sa_t * sa)
4853 ikev2_main_t *km = &ikev2_main;
4854 ip_address_t *src, *dst;
4861 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
4864 ikev2_log_error ("buffer alloc failure");
4868 ike0 = vlib_buffer_get_current (b0);
4869 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4870 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4871 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4872 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4874 sa->last_init_msg_id += 1;
4875 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4879 if (ikev2_natt_active (sa))
4880 len = ikev2_insert_non_esp_marker (ike0, len);
4882 if (sa->is_initiator)
4893 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4894 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4899 ikev2_disable_dpd (void)
4901 ikev2_main_t *km = &ikev2_main;
4902 km->dpd_disabled = 1;
4905 static_always_inline int
4906 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4908 ikev2_main_t *km = &ikev2_main;
4909 vlib_main_t *vm = km->vlib_main;
4911 if (!sa->keys_generated)
4914 if (sa->liveness_retries >= km->liveness_max_retries)
4917 f64 now = vlib_time_now (vm);
4919 if (sa->liveness_period_check < now)
4921 sa->liveness_retries++;
4922 sa->liveness_period_check = now + km->liveness_period;
4923 ikev2_send_informational_request (sa);
4929 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4932 ikev2_main_t *km = &ikev2_main;
4933 ipsec_main_t *im = &ipsec_main;
4935 ikev2_child_sa_t *c;
4940 vlib_process_wait_for_event_or_clock (vm, 2);
4941 vlib_process_get_events (vm, NULL);
4943 /* process ike child sas */
4944 ikev2_main_per_thread_data_t *tkm;
4945 vec_foreach (tkm, km->per_thread_data)
4948 u32 *to_be_deleted = 0;
4951 pool_foreach (sa, tkm->sas, ({
4952 ikev2_child_sa_t *c;
4955 if (sa->state != IKEV2_STATE_AUTHENTICATED)
4958 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4960 sa->old_remote_id_present = 0;
4964 sa->old_id_expiration -= 1;
4966 vec_foreach (c, sa->childs)
4967 ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4969 if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
4970 vec_add1 (to_be_deleted, sa - tkm->sas);
4974 vec_foreach (sai, to_be_deleted)
4976 sa = pool_elt_at_index (tkm->sas, sai[0]);
4977 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
4978 vec_foreach (c, sa->childs)
4980 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4981 ikev2_sa_del_child_sa (sa, c);
4983 ikev2_sa_free_all_vec (sa);
4984 hash_unset (tkm->sa_by_rspi, sa->rspi);
4985 pool_put (tkm->sas, sa);
4989 p = pool_elt_at_index (km->profiles, sa->profile_index);
4992 ikev2_initiate_sa_init (vm, p->name);
4996 vec_free (to_be_deleted);
4999 /* process ipsec sas */
5002 pool_foreach (sa, im->sad, ({
5003 ikev2_mngr_process_ipsec_sa(sa);
5007 ikev2_process_pending_sa_init (km);
5013 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
5014 .function = ikev2_mngr_process_fn,
5015 .type = VLIB_NODE_TYPE_PROCESS,
5017 "ikev2-manager-process",
5020 VLIB_PLUGIN_REGISTER () = {
5021 .version = VPP_BUILD_VER,
5022 .description = "Internet Key Exchange (IKEv2) Protocol",
5027 * fd.io coding-style-patch-verification: ON
5030 * eval: (c-set-style "gnu")