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;
1416 if (vec_len (rekey) == 0)
1417 goto cleanup_and_exit;
1418 rekey->protocol_id = proposal->protocol_id;
1420 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1421 rekey->i_proposal->spi = rekey->spi;
1422 rekey->r_proposal = proposal;
1426 vec_reset_length (sa->r_nonce);
1427 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1428 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1431 child_sa->rekey_retries = 0;
1436 ikev2_rekey_t *rekey;
1437 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1440 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1442 goto cleanup_and_exit;
1444 vec_add2 (sa->rekey, rekey, 1);
1445 rekey->protocol_id = n->protocol_id;
1446 rekey->spi = n->spi;
1447 rekey->i_proposal = proposal;
1449 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1453 vec_reset_length (sa->i_nonce);
1454 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1455 /* generate new Nr */
1456 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1457 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1460 goto cleanup_and_exit;
1466 vec_free (proposal);
1473 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1481 ikev2_sa_transform_t *tr_prf;
1484 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1490 nonce = sa->i_nonce;
1491 packet_data = sa->last_sa_init_res_packet_data;
1497 nonce = sa->r_nonce;
1498 packet_data = sa->last_sa_init_req_packet_data;
1501 data = vec_new (u8, 4);
1503 vec_append (data, id->data);
1505 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1506 vec_append (authmsg, packet_data);
1507 vec_append (authmsg, nonce);
1508 vec_append (authmsg, id_hash);
1516 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1518 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1519 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1520 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1521 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1528 ikev2_sa_match_ts (ikev2_sa_t * sa)
1530 ikev2_main_t *km = &ikev2_main;
1532 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1533 ikev2_id_t *id_rem, *id_loc;
1536 pool_foreach (p, km->profiles, ({
1538 if (sa->is_initiator)
1554 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1555 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1558 sa->profile_index = p - km->profiles;
1560 vec_foreach(ts, sa->childs[0].tsi)
1562 if (ikev2_ts_cmp(p_tsi, ts))
1564 vec_add1 (tsi, ts[0]);
1569 vec_foreach(ts, sa->childs[0].tsr)
1571 if (ikev2_ts_cmp(p_tsr, ts))
1573 vec_add1 (tsr, ts[0]);
1584 vec_free (sa->childs[0].tsi);
1585 vec_free (sa->childs[0].tsr);
1586 sa->childs[0].tsi = tsi;
1587 sa->childs[0].tsr = tsr;
1593 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1598 ikev2_sa_auth (ikev2_sa_t * sa)
1600 ikev2_main_t *km = &ikev2_main;
1601 ikev2_profile_t *p, *sel_p = 0;
1602 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1603 ikev2_sa_transform_t *tr_prf;
1606 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1608 /* only shared key and rsa signature */
1609 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1610 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1612 ikev2_elog_uint (IKEV2_LOG_ERROR,
1613 "unsupported authentication method %u",
1615 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1619 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1620 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1622 ikev2_id_t *id_rem, *id_loc;
1623 ikev2_auth_t *sa_auth;
1625 if (sa->is_initiator)
1629 sa_auth = &sa->r_auth;
1635 sa_auth = &sa->i_auth;
1639 pool_foreach (p, km->profiles, ({
1642 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1643 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1646 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1648 if (!p->auth.data ||
1649 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1652 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1653 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1655 if (!clib_memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1657 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1664 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1666 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1669 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1671 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1684 sa->udp_encap = sel_p->udp_encap;
1685 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1689 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1691 if (!sa->is_initiator)
1693 vec_free (sa->r_id.data);
1694 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1695 sa->r_id.type = sel_p->loc_id.type;
1696 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1697 sa->i_id.type = sel_p->rem_id.type;
1699 /* generate our auth data */
1700 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1701 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1703 vec_free (sa->r_auth.data);
1704 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1705 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1707 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1709 vec_free (sa->r_auth.data);
1710 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1711 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1715 /* select transforms for 1st child sa */
1716 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1717 sa->childs[0].r_proposals =
1718 ikev2_select_proposal (sa->childs[0].i_proposals,
1719 IKEV2_PROTOCOL_ESP);
1721 if (~0 != sel_p->tun_itf)
1723 sa->is_tun_itf_set = 1;
1724 sa->tun_itf = sel_p->tun_itf;
1730 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1731 "profile found! ispi %lx", sa->ispi);
1732 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1740 ikev2_sa_auth_init (ikev2_sa_t * sa)
1742 ikev2_main_t *km = &ikev2_main;
1743 u8 *authmsg, *key_pad, *psk = 0;
1744 ikev2_sa_transform_t *tr_prf;
1747 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1749 /* only shared key and rsa signature */
1750 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1751 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1753 ikev2_elog_uint (IKEV2_LOG_ERROR,
1754 "unsupported authentication method %u",
1756 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1760 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1761 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1762 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1764 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1766 vec_free (sa->i_auth.data);
1767 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1768 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1770 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1772 vec_free (sa->i_auth.data);
1773 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1774 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1783 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1785 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1789 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1791 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1801 ipsec_sa_flags_t flags;
1804 ipsec_crypto_alg_t encr_type;
1805 ipsec_integ_alg_t integ_type;
1806 ip46_address_t local_ip;
1807 ip46_address_t remote_ip;
1808 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1810 u32 old_remote_sa_id;
1811 u16 ipsec_over_udp_port;
1814 } ikev2_add_ipsec_tunnel_args_t;
1817 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1819 ikev2_main_t *km = &ikev2_main;
1823 if (~0 == a->sw_if_index)
1825 /* no tunnel associated with the SA/profile - create a new one */
1826 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1827 &a->local_ip, &a->remote_ip, 0,
1828 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1829 TUNNEL_MODE_P2P, &sw_if_index);
1831 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1833 if (hash_get (km->sw_if_indices, sw_if_index))
1834 /* interface is managed by IKE; proceed with updating SAs */
1837 hash_set1 (km->sw_if_indices, sw_if_index);
1841 sw_if_index = a->sw_if_index;
1842 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1847 ikev2_elog_uint (IKEV2_LOG_ERROR,
1848 "installing ipip tunnel failed! local spi: %x",
1854 vec_add1 (sas_in, a->remote_sa_id);
1857 ipsec_tun_protect_del (sw_if_index, NULL);
1859 /* replace local SA immediately */
1860 ipsec_sa_unlock_id (a->local_sa_id);
1862 /* keep the old sa */
1863 vec_add1 (sas_in, a->old_remote_sa_id);
1866 rv = ipsec_sa_add_and_lock (a->local_sa_id,
1868 IPSEC_PROTOCOL_ESP, a->encr_type,
1869 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1870 a->flags, 0, a->salt_local, &a->local_ip,
1871 &a->remote_ip, TUNNEL_ENCAP_DECAP_FLAG_NONE,
1872 IP_DSCP_CS0, NULL, a->src_port, a->dst_port);
1876 rv = ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1877 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1878 a->integ_type, &a->rem_ikey,
1879 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1880 a->salt_remote, &a->remote_ip,
1881 &a->local_ip, TUNNEL_ENCAP_DECAP_FLAG_NONE,
1883 a->ipsec_over_udp_port, a->ipsec_over_udp_port);
1887 rv = ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1894 ipsec_sa_unlock_id (a->remote_sa_id);
1896 ipsec_sa_unlock_id (a->local_sa_id);
1902 ikev2_create_tunnel_interface (vlib_main_t * vm,
1904 ikev2_child_sa_t * child, u32 sa_index,
1905 u32 child_index, u8 is_rekey)
1907 u32 thread_index = vlib_get_thread_index ();
1908 ikev2_main_t *km = &ikev2_main;
1909 ipsec_crypto_alg_t encr_type;
1910 ipsec_integ_alg_t integ_type;
1911 ikev2_profile_t *p = 0;
1912 ikev2_sa_transform_t *tr;
1913 ikev2_sa_proposal_t *proposals;
1915 ikev2_add_ipsec_tunnel_args_t a;
1917 clib_memset (&a, 0, sizeof (a));
1919 if (!child->r_proposals)
1921 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1925 if (sa->is_initiator)
1927 ip_address_to_46 (&sa->iaddr, &a.local_ip);
1928 ip_address_to_46 (&sa->raddr, &a.remote_ip);
1929 proposals = child->r_proposals;
1930 a.local_spi = child->r_proposals[0].spi;
1931 a.remote_spi = child->i_proposals[0].spi;
1935 ip_address_to_46 (&sa->raddr, &a.local_ip);
1936 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
1937 proposals = child->i_proposals;
1938 a.local_spi = child->i_proposals[0].spi;
1939 a.remote_spi = child->r_proposals[0].spi;
1942 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1945 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1946 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1948 if (ikev2_natt_active (sa))
1949 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1950 a.is_rekey = is_rekey;
1952 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1953 if (tr && tr->esn_type)
1954 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1956 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1959 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1961 switch (tr->key_len)
1964 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1967 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1970 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1973 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1978 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1981 switch (tr->key_len)
1984 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1987 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1990 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1993 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2001 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2007 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2010 a.encr_type = encr_type;
2014 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2017 switch (tr->integ_type)
2019 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
2020 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
2022 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
2023 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
2025 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
2026 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
2028 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
2029 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2032 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2038 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2044 integ_type = IPSEC_INTEG_ALG_NONE;
2047 a.integ_type = integ_type;
2048 ikev2_calc_child_keys (sa, child);
2050 if (sa->is_initiator)
2052 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2053 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2054 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2055 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2058 a.salt_remote = child->salt_er;
2059 a.salt_local = child->salt_ei;
2061 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2065 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2066 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2067 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2068 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2071 a.salt_remote = child->salt_ei;
2072 a.salt_local = child->salt_er;
2075 ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port;
2076 a.src_port = sa->ipsec_over_udp_port;
2079 if (sa->is_initiator && sa->profile_index != ~0)
2080 p = pool_elt_at_index (km->profiles, sa->profile_index);
2082 if (p && p->lifetime)
2084 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2085 if (p->lifetime_jitter)
2087 // This is not much better than rand(3), which Coverity warns
2088 // is unsuitable for security applications; random_u32 is
2089 // however fast. If this perturbance to the expiration time
2090 // needs to use a better RNG then we may need to use something
2091 // like /dev/urandom which has significant overhead.
2092 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2093 rnd = random_u32 (&rnd);
2095 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2099 if (thread_index & 0xffffffc0)
2100 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2102 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2103 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2105 child->local_sa_id =
2107 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2109 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2114 /* create a new remote SA ID to keep the old SA for a bit longer
2115 * so the peer has some time to swap their SAs */
2117 /* use most significat bit of child index part in id */
2119 if (sa->current_remote_id_mask)
2121 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2122 sa->current_remote_id_mask = 0;
2126 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2127 sa->current_remote_id_mask = mask;
2128 remote_sa_id |= mask;
2130 sa->old_id_expiration = 3.0;
2131 sa->old_remote_id_present = 1;
2134 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2136 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2137 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2139 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2140 (u8 *) & a, sizeof (a));
2146 ip46_address_t local_ip;
2147 ip46_address_t remote_ip;
2151 } ikev2_del_ipsec_tunnel_args_t;
2153 static_always_inline u32
2154 ikev2_flip_alternate_sa_bit (u32 id)
2163 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2165 ikev2_main_t *km = &ikev2_main;
2166 ipip_tunnel_t *ipip = NULL;
2169 if (~0 == a->sw_if_index)
2172 ipip_tunnel_key_t key = {
2174 .dst = a->remote_ip,
2175 .transport = IPIP_TRANSPORT_IP4,
2180 ipip = ipip_tunnel_db_find (&key);
2184 sw_if_index = ipip->sw_if_index;
2185 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2192 sw_if_index = a->sw_if_index;
2193 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2196 if (~0 != sw_if_index)
2197 ipsec_tun_protect_del (sw_if_index, NULL);
2199 ipsec_sa_unlock_id (a->remote_sa_id);
2200 ipsec_sa_unlock_id (a->local_sa_id);
2201 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2204 ipip_del_tunnel (ipip->sw_if_index);
2208 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2209 ikev2_child_sa_t * child)
2211 ikev2_del_ipsec_tunnel_args_t a;
2213 clib_memset (&a, 0, sizeof (a));
2215 if (sa->is_initiator)
2217 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2218 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2222 ip_address_to_46 (&sa->raddr, &a.local_ip);
2223 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2226 a.remote_sa_id = child->remote_sa_id;
2227 a.local_sa_id = child->local_sa_id;
2228 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2230 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2236 ikev2_generate_message (vlib_buffer_t * b, ikev2_sa_t * sa,
2237 ike_header_t * ike, void *user, udp_header_t * udp)
2239 ikev2_main_t *km = &ikev2_main;
2240 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2242 ike_payload_header_t *ph;
2246 ikev2_sa_transform_t *tr_encr, *tr_integ;
2248 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2250 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2252 ikev2_payload_chain_t *chain = 0;
2253 ikev2_payload_new_chain (chain);
2255 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2257 if (sa->r_proposals == 0)
2259 ikev2_payload_add_notify (chain,
2260 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2261 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2263 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2265 u8 *data = vec_new (u8, 2);
2266 ikev2_sa_transform_t *tr_dh;
2268 ikev2_sa_get_td_for_type (sa->r_proposals,
2269 IKEV2_TRANSFORM_TYPE_DH);
2270 ASSERT (tr_dh && tr_dh->dh_type);
2272 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2273 data[1] = (tr_dh->dh_type) & 0xff;
2275 ikev2_payload_add_notify (chain,
2276 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2279 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2281 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2283 u8 *data = vec_new (u8, 1);
2285 data[0] = sa->unsupported_cp;
2286 ikev2_payload_add_notify (chain,
2287 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2295 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2296 ikev2_payload_add_sa (chain, sa->r_proposals);
2297 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2298 ikev2_payload_add_nonce (chain, sa->r_nonce);
2300 u8 *nat_detection_sha1 =
2301 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2302 clib_host_to_net_u64 (sa->rspi),
2303 &sa->raddr, udp->dst_port);
2304 ikev2_payload_add_notify (chain,
2305 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2306 nat_detection_sha1);
2307 vec_free (nat_detection_sha1);
2308 nat_detection_sha1 =
2309 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2310 clib_host_to_net_u64 (sa->rspi),
2311 &sa->iaddr, udp->src_port);
2312 ikev2_payload_add_notify (chain,
2313 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2314 nat_detection_sha1);
2315 vec_free (nat_detection_sha1);
2318 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2320 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2322 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2323 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2324 ikev2_payload_add_auth (chain, &sa->r_auth);
2325 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2326 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2327 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2329 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2331 ikev2_payload_add_notify (chain,
2332 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2334 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2336 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2338 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2340 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2341 ikev2_payload_add_auth (chain, &sa->r_auth);
2343 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2345 ikev2_payload_add_notify (chain,
2346 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2347 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2348 ikev2_payload_add_auth (chain, &sa->r_auth);
2349 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2350 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2352 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2354 u8 *data = vec_new (u8, 1);
2356 data[0] = sa->unsupported_cp;
2357 ikev2_payload_add_notify (chain,
2358 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2362 else if (sa->state == IKEV2_STATE_SA_INIT)
2364 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2365 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2366 ikev2_payload_add_auth (chain, &sa->i_auth);
2367 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2368 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2369 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2370 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2375 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2379 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2381 /* if pending delete */
2384 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2386 if (ike_hdr_is_request (ike))
2387 ikev2_payload_add_delete (chain, sa->del);
2389 /* The response to a request that deletes the IKE SA is an empty
2390 INFORMATIONAL response. */
2391 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2393 /* The response to a request that deletes ESP or AH SAs will contain
2394 delete payloads for the paired SAs going in the other direction. */
2397 ikev2_payload_add_delete (chain, sa->del);
2402 /* received N(AUTHENTICATION_FAILED) */
2403 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2405 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2408 /* received unsupported critical payload */
2409 else if (sa->unsupported_cp)
2411 u8 *data = vec_new (u8, 1);
2413 data[0] = sa->unsupported_cp;
2414 ikev2_payload_add_notify (chain,
2415 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2418 sa->unsupported_cp = 0;
2420 /* else send empty response */
2422 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2424 if (sa->is_initiator)
2427 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2428 ikev2_notify_t notify;
2429 u8 *data = vec_new (u8, 4);
2430 clib_memset (¬ify, 0, sizeof (notify));
2431 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2432 notify.spi = sa->childs[0].i_proposals->spi;
2433 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2435 ikev2_payload_add_sa (chain, proposals);
2436 ikev2_payload_add_nonce (chain, sa->i_nonce);
2437 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2438 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2439 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2446 if (vec_len (sa->rekey) > 0)
2448 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2449 ikev2_payload_add_nonce (chain, sa->r_nonce);
2450 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2452 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2454 vec_del1 (sa->rekey, 0);
2456 else if (sa->unsupported_cp)
2458 u8 *data = vec_new (u8, 1);
2460 data[0] = sa->unsupported_cp;
2461 ikev2_payload_add_notify (chain,
2462 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2465 sa->unsupported_cp = 0;
2469 ikev2_payload_add_notify (chain,
2470 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2477 ike->version = IKE_VERSION_2;
2478 ike->nextpayload = IKEV2_PAYLOAD_SK;
2479 tlen = sizeof (*ike);
2481 if (sa->is_initiator)
2482 ike->flags |= IKEV2_HDR_FLAG_INITIATOR;
2484 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2486 tlen += vec_len (chain->data);
2487 ike->nextpayload = chain->first_payload_type;
2488 ike->length = clib_host_to_net_u32 (tlen);
2490 if (tlen + b->current_length + b->current_data > buffer_data_size)
2496 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2498 /* store whole IKE payload - needed for PSK auth */
2499 vec_reset_length (sa->last_sa_init_res_packet_data);
2500 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2504 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2505 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2508 plen = sizeof (*ph);
2509 ph = (ike_payload_header_t *) & ike->payload[0];
2510 ph->nextpayload = chain->first_payload_type;
2513 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2514 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2515 plen += vec_len (chain->data) + iv_len;
2517 /* add space for hmac/tag */
2519 plen += tr_integ->key_trunc;
2521 plen += IKEV2_GCM_ICV_SIZE;
2524 if (tlen + b->current_length + b->current_data > buffer_data_size)
2530 /* payload and total length */
2531 ph->length = clib_host_to_net_u16 (plen);
2532 ike->length = clib_host_to_net_u32 (tlen);
2536 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2537 ph->payload, (u8 *) ike,
2538 sizeof (*ike) + sizeof (*ph),
2539 ph->payload + plen - sizeof (*ph) -
2540 IKEV2_GCM_ICV_SIZE))
2548 if (!ikev2_encrypt_data
2549 (ptd, sa, tr_encr, chain->data, ph->payload))
2555 ikev2_calc_integr (tr_integ,
2556 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2557 (u8 *) ike, tlen - tr_integ->key_trunc);
2558 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2559 sizeof (*ike), integ, tr_integ->key_trunc);
2562 /* store whole IKE payload - needed for retransmit */
2563 vec_reset_length (sa->last_res_packet_data);
2564 vec_add (sa->last_res_packet_data, ike, tlen);
2568 ikev2_payload_destroy_chain (chain);
2574 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2575 ip_address_t iaddr, ip_address_t raddr,
2580 u8 payload = ike->nextpayload;
2582 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2583 ip_address_cmp (&sa->iaddr, &iaddr) ||
2584 ip_address_cmp (&sa->raddr, &raddr))
2589 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2591 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2592 u32 plen = clib_net_to_host_u16 (ikep->length);
2594 if (plen < sizeof (ike_payload_header_t))
2597 if (payload == IKEV2_PAYLOAD_NONCE &&
2598 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2600 /* req is retransmit */
2601 if (sa->state == IKEV2_STATE_SA_INIT)
2603 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2604 u32 slen = clib_net_to_host_u32 (tmp->length);
2605 ike->ispi = tmp->ispi;
2606 ike->rspi = tmp->rspi;
2607 ike->nextpayload = tmp->nextpayload;
2608 ike->version = tmp->version;
2609 ike->exchange = tmp->exchange;
2610 ike->flags = tmp->flags;
2611 ike->msgid = tmp->msgid;
2612 ike->length = tmp->length;
2613 clib_memcpy_fast (ike->payload, tmp->payload,
2614 slen - sizeof (*ike));
2615 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2616 "ispi %lx IKE_SA_INIT retransmit "
2617 "from %d.%d.%d.%d to %d.%d.%d.%d",
2619 ip_addr_v4 (&raddr).as_u32,
2620 ip_addr_v4 (&iaddr).as_u32);
2623 /* else ignore req */
2626 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2627 "ispi %lx IKE_SA_INIT ignore "
2628 "from %d.%d.%d.%d to %d.%d.%d.%d",
2630 ip_addr_v4 (&raddr).as_u32,
2631 ip_addr_v4 (&iaddr).as_u32);
2635 payload = ikep->nextpayload;
2643 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2644 ip_address_t raddr, u32 rlen)
2648 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2651 pool_foreach (sa, ptd->sas, ({
2652 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2658 /* req is not retransmit */
2663 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2665 if (ike_hdr_is_response (ike))
2668 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2671 if (msg_id > sa->last_msg_id)
2673 sa->last_msg_id = msg_id;
2677 /* retransmitted req */
2678 if (msg_id == sa->last_msg_id)
2680 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2681 u32 slen = clib_net_to_host_u32 (tmp->length);
2682 ike->ispi = tmp->ispi;
2683 ike->rspi = tmp->rspi;
2684 ike->nextpayload = tmp->nextpayload;
2685 ike->version = tmp->version;
2686 ike->exchange = tmp->exchange;
2687 ike->flags = tmp->flags;
2688 ike->msgid = tmp->msgid;
2689 ike->length = tmp->length;
2690 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2691 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2692 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2693 ip_addr_v4 (&sa->iaddr).as_u32);
2697 /* old req ignore */
2698 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2699 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2700 ip_addr_v4 (&sa->iaddr).as_u32);
2705 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2707 ikev2_main_t *km = &ikev2_main;
2708 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2709 sa->profile_index = ~0;
2713 ikev2_del_sa_init_from_main (u64 * ispi)
2715 ikev2_main_t *km = &ikev2_main;
2716 uword *p = hash_get (km->sa_by_ispi, *ispi);
2719 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2720 hash_unset (km->sa_by_ispi, sai->ispi);
2721 ikev2_sa_free_all_vec (sai);
2722 pool_put (km->sais, sai);
2727 ikev2_del_sa_init (u64 ispi)
2729 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2733 static_always_inline void
2734 ikev2_rewrite_v6_addrs (ikev2_sa_t * sa, ip6_header_t * ih)
2736 if (sa->is_initiator)
2738 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2739 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2743 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2744 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2748 static_always_inline void
2749 ikev2_rewrite_v4_addrs (ikev2_sa_t * sa, ip4_header_t * ih)
2751 if (sa->is_initiator)
2753 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2754 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2758 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2759 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2763 static_always_inline void
2764 ikev2_set_ip_address (ikev2_sa_t * sa, const void *iaddr,
2765 const void *raddr, const int af)
2767 ip_address_set (&sa->raddr, raddr, af);
2768 ip_address_set (&sa->iaddr, iaddr, af);
2772 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2773 ip6_header_t * ip6, u8 is_ip4)
2778 src = ip4->src_address.as_u32;
2779 dst = ip4->dst_address.as_u32;
2783 src = ip6->src_address.as_u32[3];
2784 dst = ip6->dst_address.as_u32[3];
2786 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2787 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2788 exchange, src, dst);
2791 static_always_inline uword
2792 ikev2_node_internal (vlib_main_t * vm,
2793 vlib_node_runtime_t * node, vlib_frame_t * frame,
2796 u32 n_left = frame->n_vectors, *from;
2797 ikev2_main_t *km = &ikev2_main;
2798 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2799 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2800 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2803 from = vlib_frame_vector_args (frame);
2804 vlib_get_buffers (vm, from, bufs, n_left);
2809 vlib_buffer_t *b0 = b[0];
2810 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2811 : IKEV2_NEXT_IP6_ERROR_DROP;
2812 ip4_header_t *ip40 = 0;
2813 ip6_header_t *ip60 = 0;
2816 ikev2_sa_t *sa0 = 0;
2817 ikev2_sa_t sa; /* temporary store for SA */
2820 int is_req = 0, has_non_esp_marker = 0;
2822 ASSERT (0 == b0->punt_reason
2824 && b0->punt_reason ==
2825 ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0]));
2828 && b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2830 u8 *ptr = vlib_buffer_get_current (b0);
2831 ip40 = (ip4_header_t *) ptr;
2832 ptr += sizeof (*ip40);
2833 udp0 = (udp_header_t *) ptr;
2834 ptr += sizeof (*udp0);
2835 ike0 = (ike_header_t *) ptr;
2836 ip_hdr_sz = sizeof (*ip40);
2840 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2841 ike0 = vlib_buffer_get_current (b0);
2842 vlib_buffer_advance (b0, -sizeof (*udp0));
2843 udp0 = vlib_buffer_get_current (b0);
2847 ip40 = (ip4_header_t *) ipx_hdr;
2848 ip_hdr_sz = sizeof (*ip40);
2852 ip60 = (ip6_header_t *) ipx_hdr;
2853 ip_hdr_sz = sizeof (*ip60);
2855 vlib_buffer_advance (b0, -ip_hdr_sz);
2858 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2860 /* check for non-esp marker */
2861 if (*((u32 *) ike0) == 0)
2864 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2865 rlen -= sizeof (ikev2_non_esp_marker);
2866 has_non_esp_marker = 1;
2869 if (clib_net_to_host_u32 (ike0->length) != rlen)
2871 vlib_node_increment_counter (vm, node->node_index,
2872 IKEV2_ERROR_BAD_LENGTH, 1);
2876 if (ike0->version != IKE_VERSION_2)
2878 vlib_node_increment_counter (vm, node->node_index,
2879 IKEV2_ERROR_NOT_IKEV2, 1);
2883 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2886 clib_memset (sa0, 0, sizeof (*sa0));
2888 if (ike_hdr_is_initiator (ike0))
2890 if (ike0->rspi == 0)
2893 ikev2_set_ip_address (sa0, &ip40->src_address,
2894 &ip40->dst_address, AF_IP4);
2896 ikev2_set_ip_address (sa0, &ip60->src_address,
2897 &ip60->dst_address, AF_IP6);
2899 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2902 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2906 vlib_node_increment_counter (vm, node->node_index,
2909 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2911 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2916 res = ikev2_process_sa_init_req (vm, sa0, ike0, udp0, rlen);
2918 vlib_node_increment_counter (vm, node->node_index,
2919 IKEV2_ERROR_MALFORMED_PACKET,
2922 if (sa0->state == IKEV2_STATE_SA_INIT)
2924 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2926 ikev2_select_proposal (sa0->i_proposals,
2927 IKEV2_PROTOCOL_IKE);
2928 ikev2_generate_sa_init_data (sa0);
2931 if (sa0->state == IKEV2_STATE_SA_INIT
2932 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2934 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
2935 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2937 vlib_node_increment_counter (vm, node->node_index,
2938 IKEV2_ERROR_NO_BUFF_SPACE,
2942 if (sa0->state == IKEV2_STATE_SA_INIT)
2944 /* add SA to the pool */
2945 pool_get (ptd->sas, sa0);
2946 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2947 ikev2_init_sa (vm, sa0);
2948 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2952 ikev2_sa_free_all_vec (sa0);
2956 else //received sa_init without initiator flag
2959 ikev2_set_ip_address (sa0, &ip40->dst_address,
2960 &ip40->src_address, AF_IP4);
2962 ikev2_set_ip_address (sa0, &ip60->dst_address,
2963 &ip60->src_address, AF_IP6);
2965 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
2967 if (sa0->state == IKEV2_STATE_SA_INIT)
2970 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2971 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
2974 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2976 if (clib_atomic_bool_cmp_and_swap
2977 (&sai->init_response_received, 0, 1))
2979 ikev2_complete_sa_data (sa0, sai);
2980 ikev2_calc_keys (sa0);
2981 ikev2_sa_auth_init (sa0);
2982 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
2984 clib_net_to_host_u32 (sai->last_init_msg_id);
2985 sa0->last_init_msg_id = sai->last_init_msg_id + 1;
2987 ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2989 vlib_node_increment_counter (vm,
2991 IKEV2_ERROR_NO_BUFF_SPACE,
2996 /* we've already processed sa-init response */
2997 sa0->state = IKEV2_STATE_UNKNOWN;
3002 if (sa0->state == IKEV2_STATE_SA_INIT)
3004 /* add SA to the pool */
3005 pool_get (ptd->sas, sa0);
3006 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3007 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3011 ikev2_sa_free_all_vec (sa0);
3015 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
3018 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3021 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3022 slen = ikev2_retransmit_resp (sa0, ike0);
3025 vlib_node_increment_counter (vm, node->node_index,
3028 IKEV2_ERROR_IKE_REQ_IGNORE
3030 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3035 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3036 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3038 ikev2_sa_auth (sa0);
3040 vlib_node_increment_counter (vm, node->node_index,
3041 IKEV2_ERROR_MALFORMED_PACKET, 1);
3042 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3044 ikev2_initial_contact_cleanup (ptd, sa0);
3045 ikev2_sa_match_ts (sa0);
3046 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3047 ikev2_create_tunnel_interface (vm, sa0,
3052 if (sa0->is_initiator)
3054 ikev2_del_sa_init (sa0->ispi);
3058 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3059 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3061 vlib_node_increment_counter (vm, node->node_index,
3062 IKEV2_ERROR_NO_BUFF_SPACE,
3067 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3070 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3073 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3074 slen = ikev2_retransmit_resp (sa0, ike0);
3077 vlib_node_increment_counter (vm, node->node_index,
3080 IKEV2_ERROR_IKE_REQ_IGNORE
3082 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3087 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3090 vlib_node_increment_counter (vm, node->node_index,
3091 IKEV2_ERROR_MALFORMED_PACKET,
3099 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3101 ikev2_delete_t *d, *tmp, *resp = 0;
3102 vec_foreach (d, sa0->del)
3104 ikev2_child_sa_t *ch_sa;
3105 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3107 !sa0->is_initiator);
3110 ikev2_delete_tunnel_interface (km->vnet_main,
3112 if (!sa0->is_initiator)
3114 vec_add2 (resp, tmp, 1);
3115 tmp->protocol_id = d->protocol_id;
3116 tmp->spi = ch_sa->r_proposals[0].spi;
3118 ikev2_sa_del_child_sa (sa0, ch_sa);
3121 if (!sa0->is_initiator)
3123 vec_free (sa0->del);
3128 if (ike_hdr_is_request (ike0))
3130 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3131 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3133 vlib_node_increment_counter (vm, node->node_index,
3134 IKEV2_ERROR_NO_BUFF_SPACE,
3139 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3142 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3145 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3146 slen = ikev2_retransmit_resp (sa0, ike0);
3149 vlib_node_increment_counter (vm, node->node_index,
3152 IKEV2_ERROR_IKE_REQ_IGNORE
3154 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3159 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3162 vlib_node_increment_counter (vm, node->node_index,
3163 IKEV2_ERROR_MALFORMED_PACKET,
3171 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3174 ikev2_sa_free_all_child_sa (&sa0->childs);
3175 ikev2_child_sa_t *child;
3176 vec_add2 (sa0->childs, child, 1);
3177 clib_memset (child, 0, sizeof (*child));
3178 child->r_proposals = sa0->rekey[0].r_proposal;
3179 child->i_proposals = sa0->rekey[0].i_proposal;
3180 child->tsi = sa0->rekey[0].tsi;
3181 child->tsr = sa0->rekey[0].tsr;
3182 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3183 child - sa0->childs, 1);
3185 if (ike_hdr_is_response (ike0))
3187 vec_free (sa0->rekey);
3191 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3192 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3194 vlib_node_increment_counter (vm, node->node_index,
3195 IKEV2_ERROR_NO_BUFF_SPACE,
3203 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3207 /* if we are sending packet back, rewrite headers */
3208 if (slen && ~0 != slen)
3212 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3213 ikev2_rewrite_v4_addrs (sa0, ip40);
3217 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3218 ikev2_rewrite_v6_addrs (sa0, ip60);
3223 udp0->dst_port = udp0->src_port =
3224 clib_net_to_host_u16 (ikev2_get_port (sa0));
3226 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3227 && ikev2_natt_active (sa0))
3229 if (!has_non_esp_marker)
3230 slen = ikev2_insert_non_esp_marker (ike0, slen);
3235 if (has_non_esp_marker)
3236 slen += sizeof (ikev2_non_esp_marker);
3238 u16 tp = udp0->dst_port;
3239 udp0->dst_port = udp0->src_port;
3240 udp0->src_port = tp;
3243 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3245 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3248 ip40->length = clib_host_to_net_u16 (b0->current_length);
3249 ip40->checksum = ip4_header_checksum (ip40);
3253 ip60->payload_length =
3254 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3258 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3259 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3261 ikev2_child_sa_t *c;
3263 vec_foreach (c, sa0->childs)
3264 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3266 ikev2_delete_sa (ptd, sa0);
3268 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3269 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3272 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3273 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3274 t->next_index = next[0];
3281 vlib_node_increment_counter (vm, node->node_index,
3282 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3283 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3284 return frame->n_vectors;
3288 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3290 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */ );
3294 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3296 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */ );
3300 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3301 .function = ikev2_ip4,
3302 .name = "ikev2-ip4",
3303 .vector_size = sizeof (u32),
3304 .format_trace = format_ikev2_trace,
3305 .type = VLIB_NODE_TYPE_INTERNAL,
3307 .n_errors = ARRAY_LEN(ikev2_error_strings),
3308 .error_strings = ikev2_error_strings,
3310 .n_next_nodes = IKEV2_IP4_N_NEXT,
3312 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3313 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3317 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3318 .function = ikev2_ip6,
3319 .name = "ikev2-ip6",
3320 .vector_size = sizeof (u32),
3321 .format_trace = format_ikev2_trace,
3322 .type = VLIB_NODE_TYPE_INTERNAL,
3324 .n_errors = ARRAY_LEN(ikev2_error_strings),
3325 .error_strings = ikev2_error_strings,
3327 .n_next_nodes = IKEV2_IP6_N_NEXT,
3329 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3330 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3335 // set ikev2 proposals when vpp is used as initiator
3336 static clib_error_t *
3337 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3338 ikev2_transforms_set * ts,
3339 ikev2_sa_proposal_t ** proposals, int is_ike)
3342 ikev2_main_t *km = &ikev2_main;
3343 ikev2_sa_proposal_t *proposal;
3344 vec_add2 (*proposals, proposal, 1);
3345 ikev2_sa_transform_t *td;
3350 vec_foreach (td, km->supported_transforms)
3352 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3353 && td->encr_type == ts->crypto_alg
3354 && td->key_len == ts->crypto_key_size / 8)
3357 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3358 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3359 vec_add (td->attrs, (u8 *) attr, 4);
3360 vec_add1 (proposal->transforms, *td);
3369 r = clib_error_return (0, "Unsupported algorithm");
3373 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3377 vec_foreach (td, km->supported_transforms)
3379 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3380 && td->integ_type == ts->integ_alg)
3382 vec_add1 (proposal->transforms, *td);
3390 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3391 r = clib_error_return (0, "Unsupported algorithm");
3400 vec_foreach (td, km->supported_transforms)
3402 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3403 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3405 vec_add1 (proposal->transforms, *td);
3412 r = clib_error_return (0, "Unsupported algorithm");
3421 vec_foreach (td, km->supported_transforms)
3423 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3425 vec_add1 (proposal->transforms, *td);
3428 sa->dh_group = td->dh_type;
3436 r = clib_error_return (0, "Unsupported algorithm");
3444 vec_foreach (td, km->supported_transforms)
3446 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3448 vec_add1 (proposal->transforms, *td);
3454 r = clib_error_return (0, "Unsupported algorithm");
3463 static ikev2_profile_t *
3464 ikev2_profile_index_by_name (u8 * name)
3466 ikev2_main_t *km = &ikev2_main;
3469 p = mhash_get (&km->profile_index_by_name, name);
3473 return pool_elt_at_index (km->profiles, p[0]);
3478 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3479 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3488 b0 = vlib_get_buffer (vm, bi0);
3489 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3490 udp0 = vlib_buffer_get_current (b0);
3491 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3492 udp0->src_port = clib_host_to_net_u16 (src_port);
3493 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3496 if (ip_addr_version (dst) == AF_IP4)
3498 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3499 ip40 = vlib_buffer_get_current (b0);
3500 ip40->ip_version_and_header_length = 0x45;
3502 ip40->fragment_id = 0;
3503 ip40->flags_and_fragment_offset = 0;
3505 ip40->protocol = IP_PROTOCOL_UDP;
3506 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3507 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3508 b0->current_length =
3509 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3510 ip40->length = clib_host_to_net_u16 (b0->current_length);
3511 ip40->checksum = ip4_header_checksum (ip40);
3515 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3516 ip60 = vlib_buffer_get_current (b0);
3518 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3519 ip60->ip_version_traffic_class_and_flow_label =
3520 clib_host_to_net_u32 (0x6 << 28);
3521 ip60->payload_length =
3522 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3523 ip60->protocol = IP_PROTOCOL_UDP;
3524 ip60->hop_limit = 0xff;
3525 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3526 sizeof (ip60->src_address));
3527 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3528 sizeof (ip60->src_address));
3531 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3532 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3533 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3535 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3536 ip4_lookup_node.index : ip6_lookup_node.index;
3538 /* send the request */
3539 f = vlib_get_frame_to_node (vm, next_index);
3540 to_next = vlib_frame_vector_args (f);
3543 vlib_put_frame_to_node (vm, next_index, f);
3548 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3551 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3556 *b = vlib_get_buffer (vm, bi0);
3561 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3563 ikev2_main_t *km = &ikev2_main;
3566 EVP_PKEY_free (km->pkey);
3567 km->pkey = ikev2_load_key_file (file);
3568 if (km->pkey == NULL)
3569 return clib_error_return (0, "load key '%s' failed", file);
3574 static_always_inline vnet_api_error_t
3575 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3577 ikev2_main_t *km = &ikev2_main;
3578 udp_dst_port_info_t *pi;
3580 uword *v = hash_get (km->udp_ports, port);
3581 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3585 /* IKE already uses this port, only increment reference counter */
3592 return VNET_API_ERROR_UDP_PORT_TAKEN;
3594 udp_register_dst_port (km->vlib_main, port,
3595 ipsec4_tun_input_node.index, 1);
3596 hash_set (km->udp_ports, port, 1);
3598 p->ipsec_over_udp_port = port;
3602 static_always_inline void
3603 ikev2_unregister_udp_port (ikev2_profile_t * p)
3605 ikev2_main_t *km = &ikev2_main;
3608 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3611 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3619 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3620 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3623 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3627 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3628 ikev2_main_per_thread_data_t * tkm,
3629 ikev2_sa_t * sa, u8 send_notification)
3631 ikev2_main_t *km = &ikev2_main;
3632 ip_address_t *src, *dst;
3634 ikev2_child_sa_t *c;
3636 /* Create the Initiator notification for IKE SA removal */
3641 vec_resize (sa->del, 1);
3642 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3643 sa->del->spi = sa->ispi;
3645 if (send_notification)
3647 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3650 ikev2_log_error ("buffer alloc failure");
3654 ike0 = vlib_buffer_get_current (b0);
3655 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3656 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3657 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3659 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
3660 sa->last_init_msg_id += 1;
3661 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
3665 if (ikev2_natt_active (sa))
3666 len = ikev2_insert_non_esp_marker (ike0, len);
3668 if (sa->is_initiator)
3679 ikev2_send_ike (vm, src, dst, bi0, len,
3680 ikev2_get_port (sa), sa->dst_port, 0);
3684 /* delete local SA */
3685 vec_foreach (c, sa->childs)
3686 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3688 u64 rspi = sa->rspi;
3689 ikev2_sa_free_all_vec (sa);
3690 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3693 hash_unset (tkm->sa_by_rspi, rspi);
3694 pool_put (tkm->sas, sa);
3699 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3701 ikev2_main_per_thread_data_t *tkm;
3703 u32 pi = p - km->profiles;
3708 pool_foreach(sa, km->sais, ({
3709 if (pi == sa->profile_index)
3710 vec_add1 (del_sai, sa - km->sais);
3714 vec_foreach (sai, del_sai)
3716 sa = pool_elt_at_index (km->sais, sai[0]);
3717 ikev2_sa_free_all_vec (sa);
3718 hash_unset (km->sa_by_ispi, sa->ispi);
3719 pool_put (km->sais, sa);
3721 vec_reset_length (del_sai);
3723 vec_foreach (tkm, km->per_thread_data)
3726 pool_foreach (sa, tkm->sas, ({
3727 if (sa->profile_index != ~0 && pi == sa->profile_index)
3728 vec_add1 (del_sai, sa - tkm->sas);
3732 vec_foreach (sai, del_sai)
3734 sa = pool_elt_at_index (tkm->sas, sai[0]);
3735 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1);
3738 vec_reset_length (del_sai);
3745 ikev2_profile_free (ikev2_profile_t * p)
3749 vec_free (p->auth.data);
3751 EVP_PKEY_free (p->auth.key);
3753 vec_free (p->loc_id.data);
3754 vec_free (p->rem_id.data);
3758 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3760 ikev2_main_t *km = &ikev2_main;
3765 if (ikev2_profile_index_by_name (name))
3766 return clib_error_return (0, "policy %v already exists", name);
3768 pool_get (km->profiles, p);
3769 clib_memset (p, 0, sizeof (*p));
3770 p->name = vec_dup (name);
3771 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3772 p->responder.sw_if_index = ~0;
3774 uword index = p - km->profiles;
3775 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3779 p = ikev2_profile_index_by_name (name);
3781 return clib_error_return (0, "policy %v does not exists", name);
3783 ikev2_unregister_udp_port (p);
3784 ikev2_cleanup_profile_sessions (km, p);
3786 ikev2_profile_free (p);
3787 pool_put (km->profiles, p);
3788 mhash_unset (&km->profile_index_by_name, name, 0);
3794 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3795 u8 * auth_data, u8 data_hex_format)
3800 p = ikev2_profile_index_by_name (name);
3804 r = clib_error_return (0, "unknown profile %v", name);
3809 EVP_PKEY_free (p->auth.key);
3810 vec_free (p->auth.data);
3812 p->auth.method = auth_method;
3813 p->auth.data = vec_dup (auth_data);
3814 p->auth.hex = data_hex_format;
3816 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3818 vec_add1 (p->auth.data, 0);
3819 p->auth.key = ikev2_load_cert_file (p->auth.data);
3820 if (p->auth.key == NULL)
3821 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3828 ikev2_is_id_supported (u8 id_type)
3830 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
3831 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
3832 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
3833 id_type == IKEV2_ID_TYPE_ID_FQDN);
3837 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3843 if (!ikev2_is_id_supported (id_type))
3845 r = clib_error_return (0, "unsupported identity type %U",
3846 format_ikev2_id_type, id_type);
3850 p = ikev2_profile_index_by_name (name);
3854 r = clib_error_return (0, "unknown profile %v", name);
3860 vec_free (p->loc_id.data);
3861 p->loc_id.type = id_type;
3862 p->loc_id.data = vec_dup (data);
3866 vec_free (p->rem_id.data);
3867 p->rem_id.type = id_type;
3868 p->rem_id.data = vec_dup (data);
3874 static_always_inline void
3875 ikev2_set_ts_type (ikev2_ts_t * ts, const ip_address_t * addr)
3877 if (ip_addr_version (addr) == AF_IP4)
3878 ts->ts_type = TS_IPV4_ADDR_RANGE;
3880 ts->ts_type = TS_IPV6_ADDR_RANGE;
3883 static_always_inline void
3884 ikev2_set_ts_addrs (ikev2_ts_t * ts, const ip_address_t * start,
3885 const ip_address_t * end)
3887 ip_address_copy (&ts->start_addr, start);
3888 ip_address_copy (&ts->end_addr, end);
3892 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3893 u16 start_port, u16 end_port, ip_address_t start_addr,
3894 ip_address_t end_addr, int is_local)
3899 p = ikev2_profile_index_by_name (name);
3903 r = clib_error_return (0, "unknown profile %v", name);
3907 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
3908 return clib_error_return (0, "IP address version mismatch!");
3912 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
3913 p->loc_ts.start_port = start_port;
3914 p->loc_ts.end_port = end_port;
3915 p->loc_ts.protocol_id = protocol_id;
3916 ikev2_set_ts_type (&p->loc_ts, &start_addr);
3920 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
3921 p->rem_ts.start_port = start_port;
3922 p->rem_ts.end_port = end_port;
3923 p->rem_ts.protocol_id = protocol_id;
3924 ikev2_set_ts_type (&p->rem_ts, &start_addr);
3932 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3933 u32 sw_if_index, ip_address_t addr)
3938 p = ikev2_profile_index_by_name (name);
3942 r = clib_error_return (0, "unknown profile %v", name);
3946 p->responder.sw_if_index = sw_if_index;
3947 ip_address_copy (&p->responder.addr, &addr);
3953 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3954 ikev2_transform_encr_type_t crypto_alg,
3955 ikev2_transform_integ_type_t integ_alg,
3956 ikev2_transform_dh_type_t dh_type,
3957 u32 crypto_key_size)
3962 p = ikev2_profile_index_by_name (name);
3966 r = clib_error_return (0, "unknown profile %v", name);
3970 p->ike_ts.crypto_alg = crypto_alg;
3971 p->ike_ts.integ_alg = integ_alg;
3972 p->ike_ts.dh_type = dh_type;
3973 p->ike_ts.crypto_key_size = crypto_key_size;
3978 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3979 ikev2_transform_encr_type_t crypto_alg,
3980 ikev2_transform_integ_type_t integ_alg,
3981 u32 crypto_key_size)
3986 p = ikev2_profile_index_by_name (name);
3990 r = clib_error_return (0, "unknown profile %v", name);
3994 p->esp_ts.crypto_alg = crypto_alg;
3995 p->esp_ts.integ_alg = integ_alg;
3996 p->esp_ts.crypto_key_size = crypto_key_size;
4001 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
4002 u8 * name, u32 sw_if_index)
4007 p = ikev2_profile_index_by_name (name);
4011 r = clib_error_return (0, "unknown profile %v", name);
4015 p->tun_itf = sw_if_index;
4021 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
4024 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4025 ikev2_main_t *km = &ikev2_main;
4026 vnet_api_error_t rv = 0;
4030 return VNET_API_ERROR_INVALID_VALUE;
4034 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
4035 return VNET_API_ERROR_VALUE_EXIST;
4037 rv = ikev2_register_udp_port (p, port);
4041 v = hash_get (km->udp_ports, port);
4043 return VNET_API_ERROR_IKE_NO_PORT;
4045 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4046 return VNET_API_ERROR_INVALID_VALUE;
4048 ikev2_unregister_udp_port (p);
4054 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4056 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4061 r = clib_error_return (0, "unknown profile %v", name);
4070 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4071 u64 lifetime, u32 jitter, u32 handover,
4077 p = ikev2_profile_index_by_name (name);
4081 r = clib_error_return (0, "unknown profile %v", name);
4085 p->lifetime = lifetime;
4086 p->lifetime_jitter = jitter;
4087 p->handover = handover;
4088 p->lifetime_maxdata = maxdata;
4093 ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af,
4094 ip_address_t * out_addr)
4096 ip4_address_t *if_ip4;
4097 ip6_address_t *if_ip6;
4101 if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
4104 ip_address_set (out_addr, if_ip4, AF_IP4);
4110 if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index);
4113 ip_address_set (out_addr, if_ip6, AF_IP6);
4121 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4125 ikev2_main_t *km = &ikev2_main;
4129 int len = sizeof (ike_header_t), valid_ip = 0;
4130 ip_address_t if_ip = ip_address_initializer;
4132 p = ikev2_profile_index_by_name (name);
4136 r = clib_error_return (0, "unknown profile %v", name);
4140 if (p->responder.sw_if_index == ~0
4141 || ip_address_is_zero (&p->responder.addr))
4143 r = clib_error_return (0, "responder not set for profile %v", name);
4147 if (ikev2_get_if_address (p->responder.sw_if_index,
4148 ip_addr_version (&p->responder.addr), &if_ip))
4153 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4156 char *errmsg = "buffer alloc failure";
4157 ikev2_log_error (errmsg);
4158 return clib_error_return (0, errmsg);
4160 ike0 = vlib_buffer_get_current (b0);
4162 /* Prepare the SA and the IKE payload */
4164 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4165 ikev2_payload_chain_t *chain = 0;
4166 ikev2_payload_new_chain (chain);
4168 /* Build the IKE proposal payload */
4169 ikev2_sa_proposal_t *proposals = 0;
4170 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4171 proposals[0].proposal_num = 1;
4172 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4174 /* Add and then cleanup proposal data */
4175 ikev2_payload_add_sa (chain, proposals);
4176 ikev2_sa_free_proposal_vector (&proposals);
4178 sa.is_initiator = 1;
4179 sa.profile_index = p - km->profiles;
4180 sa.state = IKEV2_STATE_SA_INIT;
4181 sa.tun_itf = p->tun_itf;
4182 sa.udp_encap = p->udp_encap;
4183 if (p->natt_disabled)
4184 sa.natt_state = IKEV2_NATT_DISABLED;
4185 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4186 sa.is_tun_itf_set = 1;
4187 sa.initial_contact = 1;
4188 sa.dst_port = IKEV2_PORT;
4189 ikev2_generate_sa_init_data (&sa);
4190 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4191 ikev2_payload_add_nonce (chain, sa.i_nonce);
4193 /* Build the child SA proposal */
4194 vec_resize (sa.childs, 1);
4195 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4196 &sa.childs[0].i_proposals, 0);
4197 sa.childs[0].i_proposals[0].proposal_num = 1;
4198 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4199 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4200 sizeof (sa.childs[0].i_proposals[0].spi));
4202 /* Add NAT detection notification messages (mandatory) */
4203 u8 *nat_detection_sha1 =
4204 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4205 clib_host_to_net_u64 (sa.rspi),
4206 &if_ip, clib_host_to_net_u16 (IKEV2_PORT));
4208 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4209 nat_detection_sha1);
4210 vec_free (nat_detection_sha1);
4211 nat_detection_sha1 =
4212 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4213 clib_host_to_net_u64 (sa.rspi),
4215 clib_host_to_net_u16 (sa.dst_port));
4216 ikev2_payload_add_notify (chain,
4217 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4218 nat_detection_sha1);
4219 vec_free (nat_detection_sha1);
4221 u8 *sig_hash_algo = vec_new (u8, 8);
4222 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4223 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4224 ikev2_payload_add_notify (chain,
4225 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4227 vec_free (sig_hash_algo);
4229 /* Buffer update and boilerplate */
4230 len += vec_len (chain->data);
4231 ike0->nextpayload = chain->first_payload_type;
4232 ike0->length = clib_host_to_net_u32 (len);
4233 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4234 ikev2_payload_destroy_chain (chain);
4236 ike0->version = IKE_VERSION_2;
4237 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4238 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4239 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4242 sa.last_init_msg_id += 1;
4244 /* store whole IKE payload - needed for PSK auth */
4245 vec_reset_length (sa.last_sa_init_req_packet_data);
4246 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4248 /* add data to the SA then add it to the pool */
4249 ip_address_copy (&sa.iaddr, &if_ip);
4250 ip_address_copy (&sa.raddr, &p->responder.addr);
4251 sa.i_id.type = p->loc_id.type;
4252 sa.i_id.data = vec_dup (p->loc_id.data);
4253 sa.r_id.type = p->rem_id.type;
4254 sa.r_id.data = vec_dup (p->rem_id.data);
4255 sa.i_auth.method = p->auth.method;
4256 sa.i_auth.hex = p->auth.hex;
4257 sa.i_auth.data = vec_dup (p->auth.data);
4258 sa.sw_if_index = p->responder.sw_if_index;
4259 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4260 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4262 ikev2_initial_contact_cleanup (0, &sa);
4264 /* add SA to the pool */
4265 ikev2_sa_t *sa0 = 0;
4266 pool_get (km->sais, sa0);
4267 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4268 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4272 ikev2_send_ike (vm, &if_ip, &p->responder.addr, bi0, len,
4273 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
4276 ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4277 clib_host_to_net_u64 (sa0->ispi), 0,
4278 ip_addr_v4 (&p->responder.addr).as_u32,
4279 ip_addr_version (&p->responder.addr) == AF_IP4);
4284 clib_error_return (0, "interface %U does not have any IP address!",
4285 format_vnet_sw_if_index_name, vnet_get_main (),
4286 p->responder.sw_if_index);
4294 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4295 ikev2_child_sa_t * csa)
4297 /* Create the Initiator notification for child SA removal */
4298 ikev2_main_t *km = &ikev2_main;
4304 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4307 ikev2_log_error ("buffer alloc failure");
4311 ike0 = vlib_buffer_get_current (b0);
4312 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4313 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4314 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4316 vec_resize (sa->del, 1);
4317 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4318 sa->del->spi = csa->i_proposals->spi;
4319 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4320 sa->last_init_msg_id += 1;
4321 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4325 if (ikev2_natt_active (sa))
4326 len = ikev2_insert_non_esp_marker (ike0, len);
4327 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4328 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4330 /* delete local child SA */
4331 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4332 ikev2_sa_del_child_sa (sa, csa);
4336 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4339 ikev2_main_t *km = &ikev2_main;
4340 ikev2_main_per_thread_data_t *tkm;
4341 ikev2_sa_t *fsa = 0;
4342 ikev2_child_sa_t *fchild = 0;
4344 /* Search for the child SA */
4345 vec_foreach (tkm, km->per_thread_data)
4351 pool_foreach (sa, tkm->sas, ({
4352 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4362 if (!fchild || !fsa)
4364 r = clib_error_return (0, "Child SA not found");
4369 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4376 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4379 ikev2_main_t *km = &ikev2_main;
4380 ikev2_main_per_thread_data_t *tkm;
4381 ikev2_sa_t *fsa = 0;
4382 ikev2_main_per_thread_data_t *ftkm = 0;
4384 /* Search for the IKE SA */
4385 vec_foreach (tkm, km->per_thread_data)
4391 pool_foreach (sa, tkm->sas, ({
4392 if (sa->ispi == ispi)
4404 r = clib_error_return (0, "IKE SA not found");
4408 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1);
4413 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4414 ikev2_child_sa_t * csa)
4416 /* Create the Initiator request for create child SA */
4422 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4425 ikev2_log_error ("buffer alloc failure");
4429 ike0 = vlib_buffer_get_current (b0);
4430 ike0->version = IKE_VERSION_2;
4431 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4432 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4433 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4434 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4435 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4436 sa->last_init_msg_id += 1;
4438 ikev2_rekey_t *rekey;
4439 vec_reset_length (sa->rekey);
4440 vec_add2 (sa->rekey, rekey, 1);
4441 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4444 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4445 rekey->spi = proposals[0].spi;
4446 rekey->ispi = csa->i_proposals->spi;
4447 len = ikev2_generate_message (b0, sa, ike0, proposals, 0);
4451 if (ikev2_natt_active (sa))
4452 len = ikev2_insert_non_esp_marker (ike0, len);
4453 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4454 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4455 vec_free (proposals);
4459 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4462 ikev2_main_t *km = &ikev2_main;
4463 ikev2_main_per_thread_data_t *tkm;
4464 ikev2_sa_t *fsa = 0;
4465 ikev2_child_sa_t *fchild = 0;
4467 /* Search for the child SA */
4468 vec_foreach (tkm, km->per_thread_data)
4474 pool_foreach (sa, tkm->sas, ({
4475 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4485 if (!fchild || !fsa)
4487 r = clib_error_return (0, "Child SA not found");
4492 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4499 ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index)
4501 return (sa->sw_if_index == sw_if_index) && sa->is_initiator;
4505 ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index)
4507 u64 *ispi, *ispi_vec = 0;
4508 ikev2_sa_t *sa, **sap, **sa_vec = 0;
4509 ikev2_main_t *km = &ikev2_main;
4510 ikev2_main_per_thread_data_t *tkm;
4511 p->responder.sw_if_index = ~0;
4513 vec_foreach (tkm, km->per_thread_data)
4516 pool_foreach (sa, tkm->sas, ({
4517 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4518 vec_add1 (sa_vec, sa);
4522 vec_foreach (sap, sa_vec)
4524 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0);
4526 vec_reset_length (sa_vec);
4531 pool_foreach (sa, km->sais, ({
4532 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4533 vec_add1 (ispi_vec, sa->ispi);
4537 vec_foreach (ispi, ispi_vec)
4539 ikev2_del_sa_init_from_main (ispi);
4542 vec_free (ispi_vec);
4545 static clib_error_t *
4546 ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
4548 ikev2_main_t *km = &ikev2_main;
4555 pool_foreach (p, km->profiles, ({
4556 if (p->responder.sw_if_index == sw_if_index)
4557 ikev2_sa_del (p, sw_if_index);
4564 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del);
4567 ikev2_init (vlib_main_t * vm)
4569 ikev2_main_t *km = &ikev2_main;
4570 vlib_thread_main_t *tm = vlib_get_thread_main ();
4573 clib_memset (km, 0, sizeof (ikev2_main_t));
4574 km->vnet_main = vnet_get_main ();
4577 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4578 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4579 ikev2_crypto_init (km);
4581 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4583 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4584 CLIB_CACHE_LINE_BYTES);
4585 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4587 ikev2_main_per_thread_data_t *ptd =
4588 vec_elt_at_index (km->per_thread_data, thread_id);
4590 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4592 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4593 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4594 ptd->hmac_ctx = HMAC_CTX_new ();
4596 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4597 ptd->evp_ctx = &ptd->_evp_ctx;
4598 HMAC_CTX_init (&(ptd->_hmac_ctx));
4599 ptd->hmac_ctx = &ptd->_hmac_ctx;
4603 km->sa_by_ispi = hash_create (0, sizeof (uword));
4604 km->sw_if_indices = hash_create (0, 0);
4605 km->udp_ports = hash_create (0, sizeof (uword));
4607 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4608 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4609 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4610 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4612 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4");
4613 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4615 ikev2_cli_reference ();
4617 km->log_level = IKEV2_LOG_ERROR;
4618 km->log_class = vlib_log_register_class ("ikev2", 0);
4623 VLIB_INIT_FUNCTION (ikev2_init) =
4625 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4630 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4633 ikev2_main_t *km = &ikev2_main;
4634 ikev2_profile_t *p = 0;
4635 vlib_main_t *vm = km->vlib_main;
4636 f64 now = vlib_time_now (vm);
4639 if (sa->profile_index != ~0)
4640 p = pool_elt_at_index (km->profiles, sa->profile_index);
4642 if (sa->is_initiator && p && csa->time_to_expiration
4643 && now > csa->time_to_expiration)
4645 if (!csa->is_expired || csa->rekey_retries > 0)
4647 ikev2_rekey_child_sa_internal (vm, sa, csa);
4648 csa->time_to_expiration = now + p->handover;
4649 csa->is_expired = 1;
4650 if (csa->rekey_retries == 0)
4652 csa->rekey_retries = 5;
4654 else if (csa->rekey_retries > 0)
4656 csa->rekey_retries--;
4657 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4658 csa->i_proposals->spi, csa->rekey_retries);
4659 if (csa->rekey_retries == 0)
4661 csa->rekey_retries = -1;
4668 csa->time_to_expiration = 0;
4669 ikev2_delete_child_sa_internal (vm, sa, csa);
4677 ipip_tunnel_t *ipip = NULL;
4678 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4679 if (~0 == sw_if_index)
4681 ip46_address_t local_ip;
4682 ip46_address_t remote_ip;
4683 if (sa->is_initiator)
4685 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4686 ip_addr_bytes (&sa->iaddr));
4687 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4688 ip_addr_bytes (&sa->raddr));
4692 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4693 ip_addr_bytes (&sa->raddr));
4694 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4695 ip_addr_bytes (&sa->iaddr));
4699 ipip_tunnel_key_t key = {
4702 .transport = IPIP_TRANSPORT_IP4,
4707 ipip = ipip_tunnel_db_find (&key);
4710 sw_if_index = ipip->sw_if_index;
4716 vec_add1 (sas_in, csa->remote_sa_id);
4717 vlib_worker_thread_barrier_sync (vm);
4718 int rv = ipsec_tun_protect_update (sw_if_index, NULL,
4719 csa->local_sa_id, sas_in);
4722 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4723 vlib_worker_thread_barrier_release (vm);
4730 ikev2_set_log_level (ikev2_log_level_t log_level)
4732 ikev2_main_t *km = &ikev2_main;
4734 if (log_level >= IKEV2_LOG_MAX)
4736 ikev2_log_error ("unknown logging level %d", log_level);
4740 km->log_level = log_level;
4745 ikev2_set_liveness_params (u32 period, u32 max_retries)
4747 ikev2_main_t *km = &ikev2_main;
4749 if (period == 0 || max_retries == 0)
4750 return clib_error_return (0, "invalid args");
4752 km->liveness_period = period;
4753 km->liveness_max_retries = max_retries;
4758 ikev2_profile_natt_disable (u8 * name)
4760 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4762 return clib_error_return (0, "unknown profile %v", name);
4764 p->natt_disabled = 1;
4769 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4771 ikev2_main_t *km = &ikev2_main;
4772 vlib_main_t *vm = km->vlib_main;
4773 ikev2_main_per_thread_data_t *tkm;
4774 ikev2_sa_t *fsa = 0;
4775 ikev2_profile_t *p = 0;
4776 ikev2_child_sa_t *fchild = 0;
4777 f64 now = vlib_time_now (vm);
4778 vlib_counter_t counts;
4780 /* Search for the SA and child SA */
4781 vec_foreach (tkm, km->per_thread_data)
4787 pool_foreach (sa, tkm->sas, ({
4788 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4797 vlib_get_combined_counter (&ipsec_sa_counters,
4798 ipsec_sa->stat_index, &counts);
4800 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4801 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4803 if (fchild && p && p->lifetime_maxdata)
4805 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4807 fchild->time_to_expiration = now;
4813 ikev2_process_pending_sa_init_one (ikev2_main_t * km, ikev2_sa_t * sa)
4819 if (ip_address_is_zero (&sa->iaddr))
4821 p = pool_elt_at_index (km->profiles, sa->profile_index);
4822 if (!ikev2_get_if_address (p->responder.sw_if_index,
4823 ip_addr_version (&p->responder.addr),
4827 /* update NAT detection payload */
4829 ikev2_find_ike_notify_payload
4830 ((ike_header_t *) sa->last_sa_init_req_packet_data,
4831 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP);
4835 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
4836 clib_host_to_net_u64 (sa->rspi),
4838 clib_host_to_net_u16 (IKEV2_PORT));
4839 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
4844 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4847 vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0);
4848 clib_memcpy_fast (vlib_buffer_get_current (b),
4849 sa->last_sa_init_req_packet_data,
4850 vec_len (sa->last_sa_init_req_packet_data));
4852 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4853 vec_len (sa->last_sa_init_req_packet_data),
4854 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4858 ikev2_process_pending_sa_init (ikev2_main_t * km)
4865 hash_foreach (ispi, sai, km->sa_by_ispi,
4867 sa = pool_elt_at_index (km->sais, sai);
4868 if (sa->init_response_received)
4871 ikev2_process_pending_sa_init_one (km, sa);
4877 ikev2_send_informational_request (ikev2_sa_t * sa)
4879 ikev2_main_t *km = &ikev2_main;
4880 ip_address_t *src, *dst;
4887 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
4890 ikev2_log_error ("buffer alloc failure");
4894 ike0 = vlib_buffer_get_current (b0);
4895 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4896 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4897 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4898 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4900 sa->last_init_msg_id += 1;
4901 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4905 if (ikev2_natt_active (sa))
4906 len = ikev2_insert_non_esp_marker (ike0, len);
4908 if (sa->is_initiator)
4919 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4920 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4925 ikev2_disable_dpd (void)
4927 ikev2_main_t *km = &ikev2_main;
4928 km->dpd_disabled = 1;
4931 static_always_inline int
4932 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4934 ikev2_main_t *km = &ikev2_main;
4935 vlib_main_t *vm = km->vlib_main;
4937 if (!sa->keys_generated)
4940 if (sa->liveness_retries >= km->liveness_max_retries)
4943 f64 now = vlib_time_now (vm);
4945 if (sa->liveness_period_check < now)
4947 sa->liveness_retries++;
4948 sa->liveness_period_check = now + km->liveness_period;
4949 ikev2_send_informational_request (sa);
4955 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4958 ikev2_main_t *km = &ikev2_main;
4959 ipsec_main_t *im = &ipsec_main;
4961 ikev2_child_sa_t *c;
4966 vlib_process_wait_for_event_or_clock (vm, 2);
4967 vlib_process_get_events (vm, NULL);
4969 /* process ike child sas */
4970 ikev2_main_per_thread_data_t *tkm;
4971 vec_foreach (tkm, km->per_thread_data)
4974 u32 *to_be_deleted = 0;
4977 pool_foreach (sa, tkm->sas, ({
4978 ikev2_child_sa_t *c;
4981 if (sa->state != IKEV2_STATE_AUTHENTICATED)
4984 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4986 sa->old_remote_id_present = 0;
4990 sa->old_id_expiration -= 1;
4992 vec_foreach (c, sa->childs)
4993 ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4995 if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
4996 vec_add1 (to_be_deleted, sa - tkm->sas);
5000 vec_foreach (sai, to_be_deleted)
5002 sa = pool_elt_at_index (tkm->sas, sai[0]);
5003 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
5004 vec_foreach (c, sa->childs)
5006 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
5007 ikev2_sa_del_child_sa (sa, c);
5009 ikev2_sa_free_all_vec (sa);
5010 hash_unset (tkm->sa_by_rspi, sa->rspi);
5011 pool_put (tkm->sas, sa);
5015 p = pool_elt_at_index (km->profiles, sa->profile_index);
5018 ikev2_initiate_sa_init (vm, p->name);
5022 vec_free (to_be_deleted);
5025 /* process ipsec sas */
5028 pool_foreach (sa, im->sad, ({
5029 ikev2_mngr_process_ipsec_sa(sa);
5033 ikev2_process_pending_sa_init (km);
5039 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
5040 .function = ikev2_mngr_process_fn,
5041 .type = VLIB_NODE_TYPE_PROCESS,
5043 "ikev2-manager-process",
5046 VLIB_PLUGIN_REGISTER () = {
5047 .version = VPP_BUILD_VER,
5048 .description = "Internet Key Exchange (IKEv2) Protocol",
5053 * fd.io coding-style-patch-verification: ON
5056 * eval: (c-set-style "gnu")