X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fikev2%2Fikev2.c;h=11aadfb7f341bdfabed52bcfd4fce0cdc402dfa3;hb=96dabc69abbd7cfb761f286bdc925e6ee030ebdb;hp=03757c45ec3306c311e62ea534414c2a3edbc14b;hpb=1322375357fb7596fc976b5613181a3587163099;p=vpp.git diff --git a/src/plugins/ikev2/ikev2.c b/src/plugins/ikev2/ikev2.c index 03757c45ec3..11aadfb7f34 100644 --- a/src/plugins/ikev2/ikev2.c +++ b/src/plugins/ikev2/ikev2.c @@ -28,6 +28,10 @@ #include #include #include +#include + +#define IKEV2_LIVENESS_RETRIES 3 +#define IKEV2_LIVENESS_PERIOD_CHECK 30 ikev2_main_t ikev2_main; @@ -89,6 +93,22 @@ typedef enum IKEV2_N_NEXT, } ikev2_next_t; +typedef u32 ikev2_non_esp_marker; + +static_always_inline u16 +ikev2_get_port (ikev2_sa_t * sa) +{ + return sa->natt ? IKEV2_PORT_NATT : IKEV2_PORT; +} + +static_always_inline int +ikev2_insert_non_esp_marker (ike_header_t * ike, int len) +{ + memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len); + clib_memset (ike, 0, sizeof (ikev2_non_esp_marker)); + return len + sizeof (ikev2_non_esp_marker); +} + static ikev2_sa_transform_t * ikev2_find_transform_data (ikev2_sa_transform_t * t) { @@ -377,7 +397,6 @@ ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai) ikev2_sa_transform_t *t = 0, *t2; ikev2_main_t *km = &ikev2_main; - /*move some data to the new SA */ #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;}) sa->i_nonce = _(sai->i_nonce); @@ -399,6 +418,9 @@ ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai) sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data); sa->childs = _(sai->childs); sa->udp_encap = sai->udp_encap; + sa->ipsec_over_udp_port = sai->ipsec_over_udp_port; + sa->dst_port = sai->dst_port; + sa->sw_if_index = sai->sw_if_index; #undef _ @@ -584,9 +606,24 @@ ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child) vec_free (keymat); } +static_always_inline u8 * +ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, u32 ip, u16 port) +{ + /* ispi, rspi, ip, port */ + u8 buf[8 + 8 + 4 + 2]; + u8 *res = vec_new (u8, 20); + + clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi)); + clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi)); + clib_memcpy_fast (&buf[8 + 8], &ip, sizeof (ip)); + clib_memcpy_fast (&buf[8 + 8 + 4], &port, sizeof (port)); + SHA1 (buf, sizeof (buf), res); + return res; +} + static void ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa, - ike_header_t * ike) + ike_header_t * ike, udp_header_t * udp) { int p = 0; u32 len = clib_net_to_host_u32 (ike->length); @@ -631,6 +668,37 @@ ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa, else if (payload == IKEV2_PAYLOAD_NOTIFY) { ikev2_notify_t *n = ikev2_parse_notify_payload (ikep); + if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP) + { + u8 *src_sha = + ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0, + clib_net_to_host_u32 (sa-> + iaddr.as_u32), + udp->src_port); + if (clib_memcmp (src_sha, n->data, vec_len (src_sha))) + { + sa->natt = 1; + ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator" + " behind NAT", sa->ispi); + } + vec_free (src_sha); + } + else if (n->msg_type == + IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP) + { + u8 *dst_sha = + ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0, + clib_net_to_host_u32 (sa-> + raddr.as_u32), + udp->dst_port); + if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha))) + { + sa->natt = 1; + ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder" + " (self) behind NAT", sa->ispi); + } + vec_free (dst_sha); + } vec_free (n); } else if (payload == IKEV2_PAYLOAD_VENDOR) @@ -658,7 +726,7 @@ ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa, static void ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa, - ike_header_t * ike) + ike_header_t * ike, udp_header_t * udp) { int p = 0; u32 len = clib_net_to_host_u32 (ike->length); @@ -709,6 +777,35 @@ ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa, else if (payload == IKEV2_PAYLOAD_NOTIFY) { ikev2_notify_t *n = ikev2_parse_notify_payload (ikep); + if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP) + { + u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, + ike->rspi, + clib_net_to_host_u32 + (sa->raddr.as_u32), + udp->src_port); + if (clib_memcmp (src_sha, n->data, vec_len (src_sha))) + { + ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder" + " behind NAT, unsupported", sa->ispi); + } + vec_free (src_sha); + } + else if (n->msg_type == + IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP) + { + u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, + ike->rspi, + sa->iaddr.as_u32, + udp->dst_port); + if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha))) + { + sa->natt = 1; + ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator" + " (self) behind NAT", sa->ispi); + } + vec_free (dst_sha); + } vec_free (n); } else if (payload == IKEV2_PAYLOAD_VENDOR) @@ -745,6 +842,9 @@ ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload) tr_integ = ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG); + if (!sa->sk_ar || !sa->sk_ai) + return 0; + while (p < len && *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK) { @@ -984,6 +1084,7 @@ ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_payload_header_t *ikep; u32 plen; + sa->liveness_retries = 0; ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received " "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi), clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32); @@ -1113,7 +1214,7 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) { sa->unsupported_cp = payload; - return; + goto cleanup_and_exit; } } @@ -1373,14 +1474,16 @@ ikev2_sa_auth (ikev2_sa_t * sa) } } - if (sel_p) - sa->udp_encap = sel_p->udp_encap; - vec_free(auth); vec_free(psk); })); /* *INDENT-ON* */ + if (sel_p) + { + sa->udp_encap = sel_p->udp_encap; + sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port; + } vec_free (authmsg); if (sa->state == IKEV2_STATE_AUTHENTICATED) @@ -1433,7 +1536,7 @@ static void ikev2_sa_auth_init (ikev2_sa_t * sa) { ikev2_main_t *km = &ikev2_main; - u8 *authmsg, *key_pad, *psk = 0, *auth = 0; + u8 *authmsg, *key_pad, *psk = 0; ikev2_sa_transform_t *tr_prf; tr_prf = @@ -1453,8 +1556,6 @@ ikev2_sa_auth_init (ikev2_sa_t * sa) key_pad = format (0, "%s", IKEV2_KEY_PAD); authmsg = ikev2_sa_generate_authmsg (sa, 0); psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad); - auth = ikev2_calc_prf (tr_prf, psk, authmsg); - if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) { @@ -1469,7 +1570,6 @@ ikev2_sa_auth_init (ikev2_sa_t * sa) vec_free (psk); vec_free (key_pad); - vec_free (auth); vec_free (authmsg); } @@ -1502,6 +1602,9 @@ typedef struct ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey; u8 is_rekey; u32 old_remote_sa_id; + u16 ipsec_over_udp_port; + u16 src_port; + u16 dst_port; } ikev2_add_ipsec_tunnel_args_t; static void @@ -1559,19 +1662,20 @@ ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a) IPSEC_PROTOCOL_ESP, a->encr_type, &a->loc_ckey, a->integ_type, &a->loc_ikey, a->flags, 0, a->salt_local, &a->local_ip, - &a->remote_ip, NULL); + &a->remote_ip, NULL, a->src_port, a->dst_port); rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi, IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey, a->integ_type, &a->rem_ikey, (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0, a->salt_remote, &a->remote_ip, - &a->local_ip, NULL); + &a->local_ip, NULL, a->ipsec_over_udp_port, + a->ipsec_over_udp_port); rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in); } static int -ikev2_create_tunnel_interface (vnet_main_t * vnm, +ikev2_create_tunnel_interface (vlib_main_t * vm, u32 thread_index, ikev2_sa_t * sa, ikev2_child_sa_t * child, u32 sa_index, @@ -1612,8 +1716,12 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, } a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY; - a.flags |= IPSEC_SA_FLAG_IS_TUNNEL; if (sa->udp_encap) + { + a.flags |= IPSEC_SA_FLAG_IS_TUNNEL; + a.flags |= IPSEC_SA_FLAG_UDP_ENCAP; + } + if (sa->natt) a.flags |= IPSEC_SA_FLAG_UDP_ENCAP; a.is_rekey = is_rekey; @@ -1726,6 +1834,7 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, a.salt_remote = child->salt_er; a.salt_local = child->salt_ei; } + a.dst_port = a.src_port = sa->ipsec_over_udp_port; } else { @@ -1738,6 +1847,8 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, a.salt_remote = child->salt_ei; a.salt_local = child->salt_er; } + a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port; + a.src_port = sa->ipsec_over_udp_port; } if (sa->is_profile_index_set) @@ -1745,8 +1856,7 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, if (p && p->lifetime) { - child->time_to_expiration = - vlib_time_now (vnm->vlib_main) + p->lifetime; + child->time_to_expiration = vlib_time_now (vm) + p->lifetime; if (p->lifetime_jitter) { // This is not much better than rand(3), which Coverity warns @@ -1754,7 +1864,7 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, // however fast. If this perturbance to the expiration time // needs to use a better RNG then we may need to use something // like /dev/urandom which has significant overhead. - u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6); + u32 rnd = (u32) (vlib_time_now (vm) * 1e6); rnd = random_u32 (&rnd); child->time_to_expiration += 1 + (rnd % p->lifetime_jitter); @@ -1799,6 +1909,7 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, child->remote_sa_id = a.remote_sa_id = remote_sa_id; a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0); + a.ipsec_over_udp_port = sa->ipsec_over_udp_port; vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main, (u8 *) & a, sizeof (a)); @@ -1897,7 +2008,8 @@ ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa, } static u32 -ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) +ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user, + udp_header_t * udp) { v8 *integ = 0; ike_payload_header_t *ph; @@ -1951,10 +2063,30 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) } else { + ASSERT (udp); + ike->rspi = clib_host_to_net_u64 (sa->rspi); ikev2_payload_add_sa (chain, sa->r_proposals); ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data); ikev2_payload_add_nonce (chain, sa->r_nonce); + + u8 *nat_detection_sha1 = + ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi), + clib_host_to_net_u64 (sa->rspi), + clib_host_to_net_u32 (sa->raddr.as_u32), + udp->dst_port); + ikev2_payload_add_notify (chain, + IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP, + nat_detection_sha1); + vec_free (nat_detection_sha1); + nat_detection_sha1 = + ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi), + clib_host_to_net_u64 (sa->rspi), + sa->iaddr.as_u32, udp->src_port); + ikev2_payload_add_notify (chain, + IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP, + nat_detection_sha1); + vec_free (nat_detection_sha1); } } else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH) @@ -2083,7 +2215,7 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) } else { - if (sa->rekey) + if (vec_len (sa->rekey) > 0) { ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal); ikev2_payload_add_nonce (chain, sa->r_nonce); @@ -2292,6 +2424,33 @@ ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike) return -1; } +static void +ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa) +{ + ikev2_main_t *km = &ikev2_main; + sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period; +} + +static void +ikev2_del_sa_init_from_main (u64 * ispi) +{ + ikev2_main_t *km = &ikev2_main; + uword *p = hash_get (km->sa_by_ispi, *ispi); + if (p) + { + ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]); + hash_unset (km->sa_by_ispi, sai->ispi); + ikev2_sa_free_all_vec (sai); + pool_put (km->sais, sai); + } +} + +static void +ikev2_del_sa_init (u64 ispi) +{ + vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi, + sizeof (ispi)); +} static uword ikev2_node_fn (vlib_main_t * vm, @@ -2324,7 +2483,7 @@ ikev2_node_fn (vlib_main_t * vm, ikev2_sa_t *sa0 = 0; ikev2_sa_t sa; /* temporary store for SA */ int len = 0; - int r; + int r, is_req = 0, has_non_esp_marker = 0; /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; @@ -2335,11 +2494,31 @@ ikev2_node_fn (vlib_main_t * vm, n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); - ike0 = vlib_buffer_get_current (b0); - vlib_buffer_advance (b0, -sizeof (*udp0)); - udp0 = vlib_buffer_get_current (b0); - vlib_buffer_advance (b0, -sizeof (*ip40)); - ip40 = vlib_buffer_get_current (b0); + + if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0]) + { + u8 *ptr = vlib_buffer_get_current (b0); + ip40 = (ip4_header_t *) ptr; + ptr += sizeof (*ip40); + udp0 = (udp_header_t *) ptr; + ptr += sizeof (*udp0); + ike0 = (ike_header_t *) ptr; + } + else + { + ike0 = vlib_buffer_get_current (b0); + vlib_buffer_advance (b0, -sizeof (*udp0)); + udp0 = vlib_buffer_get_current (b0); + vlib_buffer_advance (b0, -sizeof (*ip40)); + ip40 = vlib_buffer_get_current (b0); + } + + /* check for non-esp marker */ + if (*((u32 *) ike0) == 0) + { + ike0 = (ike_header_t *) ((u8 *) ike0 + sizeof (u32)); + has_non_esp_marker = 1; + } if (ike0->version != IKE_VERSION_2) { @@ -2359,6 +2538,7 @@ ikev2_node_fn (vlib_main_t * vm, { sa0->raddr.as_u32 = ip40->dst_address.as_u32; sa0->iaddr.as_u32 = ip40->src_address.as_u32; + sa0->dst_port = clib_net_to_host_u16 (udp0->src_port); r = ikev2_retransmit_sa_init (ike0, sa0->iaddr, sa0->raddr); @@ -2378,7 +2558,7 @@ ikev2_node_fn (vlib_main_t * vm, goto dispatch0; } - ikev2_process_sa_init_req (vm, sa0, ike0); + ikev2_process_sa_init_req (vm, sa0, ike0, udp0); if (sa0->state == IKEV2_STATE_SA_INIT) { @@ -2392,7 +2572,7 @@ ikev2_node_fn (vlib_main_t * vm, if (sa0->state == IKEV2_STATE_SA_INIT || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE) { - len = ikev2_generate_message (sa0, ike0, 0); + len = ikev2_generate_message (sa0, ike0, 0, udp0); } if (sa0->state == IKEV2_STATE_SA_INIT) @@ -2401,6 +2581,7 @@ ikev2_node_fn (vlib_main_t * vm, pool_get (km->per_thread_data[thread_index].sas, sa0); clib_memcpy_fast (sa0, &sa, sizeof (*sa0)); + ikev2_init_sa (vm, sa0); hash_set (km-> per_thread_data[thread_index].sa_by_rspi, sa0->rspi, @@ -2415,10 +2596,13 @@ ikev2_node_fn (vlib_main_t * vm, } else //received sa_init without initiator flag { - ikev2_process_sa_init_resp (vm, sa0, ike0); + sa0->raddr.as_u32 = ip40->src_address.as_u32; + sa0->iaddr.as_u32 = ip40->dst_address.as_u32; + ikev2_process_sa_init_resp (vm, sa0, ike0, udp0); if (sa0->state == IKEV2_STATE_SA_INIT) { + is_req = 1; ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH; uword *p = hash_get (km->sa_by_ispi, ike0->ispi); if (p) @@ -2426,10 +2610,20 @@ ikev2_node_fn (vlib_main_t * vm, ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]); - ikev2_complete_sa_data (sa0, sai); - ikev2_calc_keys (sa0); - ikev2_sa_auth_init (sa0); - len = ikev2_generate_message (sa0, ike0, 0); + if (clib_atomic_bool_cmp_and_swap + (&sai->init_response_received, 0, 1)) + { + ikev2_complete_sa_data (sa0, sai); + ikev2_calc_keys (sa0); + ikev2_sa_auth_init (sa0); + len = + ikev2_generate_message (sa0, ike0, 0, udp0); + } + else + { + /* we've already processed sa-init response */ + sa0->state = IKEV2_STATE_UNKNOWN; + } } } @@ -2476,6 +2670,7 @@ ikev2_node_fn (vlib_main_t * vm, goto dispatch0; } + sa0->dst_port = clib_net_to_host_u16 (udp0->src_port); ikev2_process_auth_req (vm, sa0, ike0); ikev2_sa_auth (sa0); if (sa0->state == IKEV2_STATE_AUTHENTICATED) @@ -2483,27 +2678,18 @@ ikev2_node_fn (vlib_main_t * vm, ikev2_initial_contact_cleanup (sa0); ikev2_sa_match_ts (sa0); if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE) - ikev2_create_tunnel_interface (km->vnet_main, - thread_index, sa0, + ikev2_create_tunnel_interface (vm, thread_index, sa0, &sa0->childs[0], p[0], 0, 0); } if (sa0->is_initiator) { - uword *p = hash_get (km->sa_by_ispi, ike0->ispi); - if (p) - { - ikev2_sa_t *sai = - pool_elt_at_index (km->sais, p[0]); - hash_unset (km->sa_by_ispi, sai->ispi); - ikev2_sa_free_all_vec (sai); - pool_put (km->sais, sai); - } + ikev2_del_sa_init (ike0->ispi); } else { - len = ikev2_generate_message (sa0, ike0, 0); + len = ikev2_generate_message (sa0, ike0, 0, udp0); } } } @@ -2567,9 +2753,10 @@ ikev2_node_fn (vlib_main_t * vm, } } } - if (!sa0->is_initiator) + if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE)) { - len = ikev2_generate_message (sa0, ike0, 0); + ike0->flags |= IKEV2_HDR_FLAG_RESPONSE; + len = ikev2_generate_message (sa0, ike0, 0, udp0); } } } @@ -2607,26 +2794,26 @@ ikev2_node_fn (vlib_main_t * vm, if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE) { if (sa0->childs) - vec_free (sa0->childs); + ikev2_sa_free_all_child_sa (&sa0->childs); ikev2_child_sa_t *child; vec_add2 (sa0->childs, child, 1); + clib_memset (child, 0, sizeof (*child)); child->r_proposals = sa0->rekey[0].r_proposal; child->i_proposals = sa0->rekey[0].i_proposal; child->tsi = sa0->rekey[0].tsi; child->tsr = sa0->rekey[0].tsr; - ikev2_create_tunnel_interface (km->vnet_main, - thread_index, sa0, - child, p[0], + ikev2_create_tunnel_interface (vm, thread_index, + sa0, child, p[0], child - sa0->childs, 1); } if (sa0->is_initiator) { - vec_del1 (sa0->rekey, 0); + vec_free (sa0->rekey); } else { - len = ikev2_generate_message (sa0, ike0, 0); + len = ikev2_generate_message (sa0, ike0, 0, udp0); } } } @@ -2655,6 +2842,29 @@ ikev2_node_fn (vlib_main_t * vm, ip40->dst_address.as_u32 = sa0->iaddr.as_u32; ip40->src_address.as_u32 = sa0->raddr.as_u32; } + + if (is_req) + { + udp0->dst_port = udp0->src_port = + clib_net_to_host_u16 (ikev2_get_port (sa0)); + + if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT) + && sa0->natt) + { + if (!has_non_esp_marker) + len = ikev2_insert_non_esp_marker (ike0, len); + } + } + else + { + if (has_non_esp_marker) + len += sizeof (ikev2_non_esp_marker); + + u16 tp = udp0->dst_port; + udp0->dst_port = udp0->src_port; + udp0->src_port = tp; + } + udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t)); udp0->checksum = 0; @@ -2754,7 +2964,7 @@ ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa, return r; } - if (IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 != ts->crypto_alg) + if (is_ike || IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 != ts->crypto_alg) { /* Integrity */ error = 1; @@ -2861,7 +3071,7 @@ ikev2_profile_index_by_name (u8 * name) static void ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst, - u32 bi0, u32 len) + u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index) { ip4_header_t *ip40; udp_header_t *udp0; @@ -2884,14 +3094,16 @@ ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst, ip40->protocol = IP_PROTOCOL_UDP; ip40->dst_address.as_u32 = dst->as_u32; ip40->src_address.as_u32 = src->as_u32; - udp0->dst_port = clib_host_to_net_u16 (500); - udp0->src_port = clib_host_to_net_u16 (500); + udp0->dst_port = clib_host_to_net_u16 (dst_port); + udp0->src_port = clib_host_to_net_u16 (src_port); udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t)); udp0->checksum = 0; b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t); ip40->length = clib_host_to_net_u16 (b0->current_length); ip40->checksum = ip4_header_checksum (ip40); + vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0; /* send the request */ f = vlib_get_frame_to_node (vm, ip4_lookup_node.index); @@ -2928,6 +3140,58 @@ ikev2_set_local_key (vlib_main_t * vm, u8 * file) return 0; } +static_always_inline vnet_api_error_t +ikev2_register_udp_port (ikev2_profile_t * p, u16 port) +{ + ikev2_main_t *km = &ikev2_main; + udp_dst_port_info_t *pi; + + uword *v = hash_get (km->udp_ports, port); + pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4); + + if (v) + { + /* IKE already uses this port, only increment reference counter */ + ASSERT (pi); + v[0]++; + } + else + { + if (pi) + return VNET_API_ERROR_UDP_PORT_TAKEN; + + udp_register_dst_port (km->vlib_main, port, + ipsec4_tun_input_node.index, 1); + hash_set (km->udp_ports, port, 1); + } + p->ipsec_over_udp_port = port; + return 0; +} + +static_always_inline void +ikev2_unregister_udp_port (ikev2_profile_t * p) +{ + ikev2_main_t *km = &ikev2_main; + uword *v; + + if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE) + return; + + v = hash_get (km->udp_ports, p->ipsec_over_udp_port); + if (!v) + return; + + v[0]--; + + if (v[0] == 0) + { + udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1); + hash_unset (km->udp_ports, p->ipsec_over_udp_port); + } + + p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE; +} + clib_error_t * ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add) { @@ -2942,6 +3206,7 @@ ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add) pool_get (km->profiles, p); clib_memset (p, 0, sizeof (*p)); p->name = vec_dup (name); + p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE; p->responder.sw_if_index = ~0; p->tun_itf = ~0; uword index = p - km->profiles; @@ -2953,6 +3218,8 @@ ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add) if (!p) return clib_error_return (0, "policy %v does not exists", name); + ikev2_unregister_udp_port (p); + vec_free (p->name); pool_put (km->profiles, p); mhash_unset (&km->profile_index_by_name, name, 0); @@ -3161,6 +3428,39 @@ ikev2_set_profile_tunnel_interface (vlib_main_t * vm, return 0; } +vnet_api_error_t +ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port, + u8 is_set) +{ + ikev2_profile_t *p = ikev2_profile_index_by_name (name); + ikev2_main_t *km = &ikev2_main; + vnet_api_error_t rv = 0; + uword *v; + + if (!p) + return VNET_API_ERROR_INVALID_VALUE; + + if (is_set) + { + if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE) + return VNET_API_ERROR_VALUE_EXIST; + + rv = ikev2_register_udp_port (p, port); + } + else + { + v = hash_get (km->udp_ports, port); + if (!v) + return VNET_API_ERROR_IKE_NO_PORT; + + if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE) + return VNET_API_ERROR_INVALID_VALUE; + + ikev2_unregister_udp_port (p); + } + return rv; +} + clib_error_t * ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name) { @@ -3257,13 +3557,15 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) ikev2_sa_free_proposal_vector (&proposals); sa.is_initiator = 1; - sa.profile_index = km->profiles - p; + sa.profile_index = p - km->profiles; sa.is_profile_index_set = 1; sa.state = IKEV2_STATE_SA_INIT; sa.tun_itf = p->tun_itf; sa.udp_encap = p->udp_encap; + sa.ipsec_over_udp_port = p->ipsec_over_udp_port; sa.is_tun_itf_set = 1; sa.initial_contact = 1; + sa.dst_port = IKEV2_PORT; ikev2_generate_sa_init_data (&sa); ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data); ikev2_payload_add_nonce (chain, sa.i_nonce); @@ -3277,29 +3579,21 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi, sizeof (sa.childs[0].i_proposals[0].spi)); - - /* Add NAT detection notification messages (mandatory) */ - u8 nat_detection_source[8 + 8 + 4 + 2]; - u8 *nat_detection_sha1 = vec_new (u8, 20); - - u64 tmpspi = clib_host_to_net_u64 (sa.ispi); - clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi)); - tmpspi = clib_host_to_net_u64 (sa.rspi); - clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi)); - u16 tmpport = clib_host_to_net_u16 (500); - clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport, - sizeof (tmpport)); - u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32); - clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip)); - SHA1 (nat_detection_source, sizeof (nat_detection_source), - nat_detection_sha1); + u8 *nat_detection_sha1 = + ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi), + clib_host_to_net_u64 (sa.rspi), + clib_host_to_net_u32 (if_ip->as_u32), + clib_host_to_net_u16 (IKEV2_PORT)); + ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP, nat_detection_sha1); - tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32); - clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip)); - SHA1 (nat_detection_source, sizeof (nat_detection_source), - nat_detection_sha1); + vec_free (nat_detection_sha1); + nat_detection_sha1 = + ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi), + clib_host_to_net_u64 (sa.rspi), + clib_host_to_net_u32 (p->responder.ip4.as_u32), + clib_host_to_net_u16 (sa.dst_port)); ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP, nat_detection_sha1); @@ -3340,6 +3634,7 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) sa.i_auth.method = p->auth.method; sa.i_auth.hex = p->auth.hex; sa.i_auth.data = vec_dup (p->auth.data); + sa.sw_if_index = p->responder.sw_if_index; vec_add (sa.childs[0].tsi, &p->loc_ts, 1); vec_add (sa.childs[0].tsr, &p->rem_ts, 1); @@ -3351,7 +3646,8 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) clib_memcpy_fast (sa0, &sa, sizeof (*sa0)); hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais); - ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len); + ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len, + IKEV2_PORT, sa.dst_port, sa.sw_if_index); ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to " "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0, @@ -3382,9 +3678,11 @@ ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa, sa->del->spi = csa->i_proposals->spi; ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1); sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid); - len = ikev2_generate_message (sa, ike0, 0); - - ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len); + len = ikev2_generate_message (sa, ike0, 0, 0); + if (sa->natt) + len = ikev2_insert_non_esp_marker (ike0, len); + ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len, + ikev2_get_port (sa), sa->dst_port, sa->sw_if_index); /* delete local child SA */ ikev2_delete_tunnel_interface (km->vnet_main, sa, csa); @@ -3482,9 +3780,11 @@ ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi) fsa->del->spi = ispi; ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1); fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid); - len = ikev2_generate_message (fsa, ike0, 0); - - ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len); + len = ikev2_generate_message (fsa, ike0, 0, 0); + if (fsa->natt) + len = ikev2_insert_non_esp_marker (ike0, len); + ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len, + ikev2_get_port (fsa), fsa->dst_port, fsa->sw_if_index); } @@ -3536,8 +3836,11 @@ ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa, RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi)); rekey->spi = proposals[0].spi; rekey->ispi = csa->i_proposals->spi; - len = ikev2_generate_message (sa, ike0, proposals); - ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len); + len = ikev2_generate_message (sa, ike0, proposals, 0); + if (sa->natt) + len = ikev2_insert_non_esp_marker (ike0, len); + ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len, + ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index); vec_free (proposals); } @@ -3592,6 +3895,8 @@ ikev2_init (vlib_main_t * vm) km->vnet_main = vnet_get_main (); km->vlib_main = vm; + km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK; + km->liveness_max_retries = IKEV2_LIVENESS_RETRIES; ikev2_crypto_init (km); mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword)); @@ -3606,9 +3911,14 @@ ikev2_init (vlib_main_t * vm) km->sa_by_ispi = hash_create (0, sizeof (uword)); km->sw_if_indices = hash_create (0, 0); + km->udp_ports = hash_create (0, sizeof (uword)); - udp_register_dst_port (vm, 500, ikev2_node.index, 1); + udp_register_dst_port (vm, IKEV2_PORT, ikev2_node.index, 1); + udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node.index, 1); + vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2"); + vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0], + "ikev2"); ikev2_cli_reference (); km->log_level = IKEV2_LOG_ERROR; @@ -3619,7 +3929,7 @@ ikev2_init (vlib_main_t * vm) /* *INDENT-OFF* */ VLIB_INIT_FUNCTION (ikev2_init) = { - .runs_after = VLIB_INITS("ipsec_init"), + .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"), }; /* *INDENT-ON* */ @@ -3728,6 +4038,19 @@ ikev2_set_log_level (ikev2_log_level_t log_level) return 0; } +clib_error_t * +ikev2_set_liveness_params (u32 period, u32 max_retries) +{ + ikev2_main_t *km = &ikev2_main; + + if (period == 0 || max_retries == 0) + return clib_error_return (0, "invalid args"); + + km->liveness_period = period; + km->liveness_max_retries = max_retries; + return 0; +} + static void ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa) { @@ -3783,6 +4106,9 @@ ikev2_process_pending_sa_init (ikev2_main_t * km) hash_foreach (ispi, sai, km->sa_by_ispi, ({ sa = pool_elt_at_index (km->sais, sai); + if (sa->init_response_received) + continue; + u32 bi0; if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1) return; @@ -3792,19 +4118,83 @@ ikev2_process_pending_sa_init (ikev2_main_t * km) sa->last_sa_init_req_packet_data, vec_len (sa->last_sa_init_req_packet_data)); ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0, - vec_len (sa->last_sa_init_req_packet_data)); + vec_len (sa->last_sa_init_req_packet_data), + ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index); })); /* *INDENT-ON* */ } static vlib_node_registration_t ikev2_mngr_process_node; +static void +ikev2_send_informational_request (ikev2_sa_t * sa) +{ + ikev2_main_t *km = &ikev2_main; + ip4_address_t *src, *dst; + ike_header_t *ike0; + u32 bi0 = 0; + u16 dp; + int len; + + bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &ike0); + + ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL; + ike0->ispi = clib_host_to_net_u64 (sa->ispi); + ike0->rspi = clib_host_to_net_u64 (sa->rspi); + ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1); + sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid); + len = ikev2_generate_message (sa, ike0, 0, 0); + if (sa->natt) + len = ikev2_insert_non_esp_marker (ike0, len); + + if (sa->is_initiator) + { + src = &sa->iaddr; + dst = &sa->raddr; + } + else + { + dst = &sa->iaddr; + src = &sa->raddr; + } + + dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa); + ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp, + sa->sw_if_index); +} + +static_always_inline int +ikev2_mngr_process_responder_sas (ikev2_sa_t * sa) +{ + ikev2_main_t *km = &ikev2_main; + vlib_main_t *vm = km->vlib_main; + + if (!sa->sk_ai || !sa->sk_ar) + return 0; + + if (sa->liveness_retries >= km->liveness_max_retries) + return 1; + + f64 now = vlib_time_now (vm); + + if (sa->liveness_period_check < now) + { + sa->liveness_retries++; + sa->liveness_period_check = now + km->liveness_period; + ikev2_send_informational_request (sa); + } + return 0; +} + static uword ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { ikev2_main_t *km = &ikev2_main; ipsec_main_t *im = &ipsec_main; + ikev2_profile_t *p; + ikev2_child_sa_t *c; + u32 *sai; while (1) { @@ -3817,6 +4207,8 @@ ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt, vec_foreach (tkm, km->per_thread_data) { ikev2_sa_t *sa; + u32 *to_be_deleted = 0; + /* *INDENT-OFF* */ pool_foreach (sa, tkm->sas, ({ ikev2_child_sa_t *c; @@ -3833,8 +4225,35 @@ ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt, { req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids); } + + if (ikev2_mngr_process_responder_sas (sa)) + vec_add1 (to_be_deleted, sa - tkm->sas); })); /* *INDENT-ON* */ + + vec_foreach (sai, to_be_deleted) + { + sa = pool_elt_at_index (tkm->sas, sai[0]); + u8 reinitiate = (sa->is_initiator && sa->is_profile_index_set); + vec_foreach (c, sa->childs) + { + ikev2_delete_tunnel_interface (km->vnet_main, sa, c); + ikev2_sa_del_child_sa (sa, c); + } + ikev2_sa_free_all_vec (sa); + hash_unset (tkm->sa_by_rspi, sa->rspi); + pool_put (tkm->sas, sa); + + if (reinitiate) + { + p = pool_elt_at_index (km->profiles, sa->profile_index); + if (p) + { + ikev2_initiate_sa_init (vm, p->name); + } + } + } + vec_free (to_be_deleted); } /* process ipsec sas */