X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fikev2%2Fikev2.c;h=fa653760b1d4ec538326187e15d16b8a1aefcc5e;hb=af2cc6425;hp=45da023f10405e268aef5ffa721651515f33c57a;hpb=59fea5a6a3fafe0a5a0d2f543db53af790013e3a;p=vpp.git diff --git a/src/plugins/ikev2/ikev2.c b/src/plugins/ikev2/ikev2.c index 45da023f104..fa653760b1d 100644 --- a/src/plugins/ikev2/ikev2.c +++ b/src/plugins/ikev2/ikev2.c @@ -18,7 +18,6 @@ #include #include #include -#include #include #include #include @@ -27,7 +26,10 @@ #include #include #include +#include #include +#include +#include #define IKEV2_LIVENESS_RETRIES 3 #define IKEV2_LIVENESS_PERIOD_CHECK 30 @@ -38,9 +40,9 @@ static int ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa, ikev2_child_sa_t * child); -#define ikev2_set_state(sa, v) do { \ +#define ikev2_set_state(sa, v, ...) do { \ (sa)->state = v; \ - ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \ + ikev2_elog_sa_state("ispi %lx SA state changed to " #v __VA_ARGS__, sa->ispi); \ } while(0); typedef struct @@ -61,36 +63,66 @@ format_ikev2_trace (u8 * s, va_list * args) return s; } -static vlib_node_registration_t ikev2_node; - -#define foreach_ikev2_error \ -_(PROCESSED, "IKEv2 packets processed") \ -_(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \ -_(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \ -_(IKE_REQ_RETRANSMIT, "IKE request retransmit") \ -_(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \ -_(NOT_IKEV2, "Non IKEv2 packets received") +#define IKEV2_GENERATE_SA_INIT_OK_str "" +#define IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR \ + "no DH group configured for IKE proposals!" +#define IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR \ + "DH group not supported!" typedef enum { -#define _(sym,str) IKEV2_ERROR_##sym, - foreach_ikev2_error -#undef _ - IKEV2_N_ERROR, -} ikev2_error_t; + IKEV2_GENERATE_SA_INIT_OK, + IKEV2_GENERATE_SA_INIT_ERR_NO_DH, + IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH, +} ikev2_generate_sa_error_t; -static char *ikev2_error_strings[] = { -#define _(sym,string) string, - foreach_ikev2_error -#undef _ -}; +static u8 * +format_ikev2_gen_sa_error (u8 * s, va_list * args) +{ + ikev2_generate_sa_error_t e = va_arg (*args, ikev2_generate_sa_error_t); + switch (e) + { + case IKEV2_GENERATE_SA_INIT_OK: + break; + case IKEV2_GENERATE_SA_INIT_ERR_NO_DH: + s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR); + break; + case IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH: + s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR); + break; + } + return s; +} typedef enum { IKEV2_NEXT_IP4_LOOKUP, - IKEV2_NEXT_ERROR_DROP, - IKEV2_N_NEXT, -} ikev2_next_t; + IKEV2_NEXT_IP4_ERROR_DROP, + IKEV2_IP4_N_NEXT, +} ikev2_ip4_next_t; + +typedef enum +{ + IKEV2_NEXT_IP6_LOOKUP, + IKEV2_NEXT_IP6_ERROR_DROP, + IKEV2_IP6_N_NEXT, +} ikev2_ip6_next_t; + +typedef u32 ikev2_non_esp_marker; + +static_always_inline u16 +ikev2_get_port (ikev2_sa_t * sa) +{ + return ikev2_natt_active (sa) ? 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) @@ -132,9 +164,8 @@ ikev2_select_proposal (ikev2_sa_proposal_t * proposals, if (prot_id == IKEV2_PROTOCOL_IKE) { mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) | - (1 << IKEV2_TRANSFORM_TYPE_PRF) | - (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH); - optional_bitmap = mandatory_bitmap; + (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH); + optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG); } else if (prot_id == IKEV2_PROTOCOL_ESP) { @@ -244,7 +275,7 @@ ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v) vec_free (p->transforms); } vec_free (*v); -}; +} static void ikev2_sa_free_child_sa (ikev2_child_sa_t * c) @@ -279,9 +310,12 @@ static void ikev2_sa_free_all_vec (ikev2_sa_t * sa) { vec_free (sa->i_nonce); - vec_free (sa->i_dh_data); + vec_free (sa->r_nonce); + vec_free (sa->dh_shared_key); vec_free (sa->dh_private_key); + vec_free (sa->i_dh_data); + vec_free (sa->r_dh_data); ikev2_sa_free_proposal_vector (&sa->r_proposals); ikev2_sa_free_proposal_vector (&sa->i_proposals); @@ -295,44 +329,50 @@ ikev2_sa_free_all_vec (ikev2_sa_t * sa) vec_free (sa->sk_pr); vec_free (sa->i_id.data); - vec_free (sa->i_auth.data); vec_free (sa->r_id.data); + + vec_free (sa->i_auth.data); + if (sa->i_auth.key) + EVP_PKEY_free (sa->i_auth.key); vec_free (sa->r_auth.data); if (sa->r_auth.key) EVP_PKEY_free (sa->r_auth.key); vec_free (sa->del); + vec_free (sa->rekey); + + vec_free (sa->last_sa_init_req_packet_data); + vec_free (sa->last_sa_init_res_packet_data); + + vec_free (sa->last_res_packet_data); + ikev2_sa_free_all_child_sa (&sa->childs); } static void -ikev2_delete_sa (ikev2_sa_t * sa) +ikev2_delete_sa (ikev2_main_per_thread_data_t * ptd, ikev2_sa_t * sa) { - ikev2_main_t *km = &ikev2_main; - u32 thread_index = vlib_get_thread_index (); uword *p; ikev2_sa_free_all_vec (sa); - p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi); + p = hash_get (ptd->sa_by_rspi, sa->rspi); if (p) { - hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi); - pool_put (km->per_thread_data[thread_index].sas, sa); + hash_unset (ptd->sa_by_rspi, sa->rspi); + pool_put (ptd->sas, sa); } } -static void +static ikev2_generate_sa_error_t ikev2_generate_sa_init_data (ikev2_sa_t * sa) { ikev2_sa_transform_t *t = 0, *t2; ikev2_main_t *km = &ikev2_main; if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE) - { - return; - } + return IKEV2_GENERATE_SA_INIT_ERR_NO_DH; /* check if received DH group is on our list of supported groups */ vec_foreach (t2, km->supported_transforms) @@ -347,7 +387,7 @@ ikev2_generate_sa_init_data (ikev2_sa_t * sa) if (!t) { sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE; - return; + return IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH; } if (sa->is_initiator) @@ -372,6 +412,7 @@ ikev2_generate_sa_init_data (ikev2_sa_t * sa) /* generate dh keys */ ikev2_generate_dh (sa, t); + return IKEV2_GENERATE_SA_INIT_OK; } static void @@ -380,30 +421,34 @@ 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; - sai->init_response_received = 1; - /*move some data to the new SA */ #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;}) sa->i_nonce = _(sai->i_nonce); sa->i_dh_data = _(sai->i_dh_data); sa->dh_private_key = _(sai->dh_private_key); - sa->iaddr.as_u32 = sai->iaddr.as_u32; - sa->raddr.as_u32 = sai->raddr.as_u32; + ip_address_copy (&sa->iaddr, &sai->iaddr); + ip_address_copy (&sa->raddr, &sai->raddr); sa->is_initiator = sai->is_initiator; sa->i_id.type = sai->i_id.type; + sa->r_id.type = sai->r_id.type; sa->profile_index = sai->profile_index; - sa->is_profile_index_set = sai->is_profile_index_set; sa->tun_itf = sai->tun_itf; sa->is_tun_itf_set = sai->is_tun_itf_set; + if (sai->natt_state == IKEV2_NATT_DISABLED) + sa->natt_state = IKEV2_NATT_DISABLED; sa->i_id.data = _(sai->i_id.data); + sa->r_id.data = _(sai->r_id.data); sa->i_auth.method = sai->i_auth.method; sa->i_auth.hex = sai->i_auth.hex; sa->i_auth.data = _(sai->i_auth.data); sa->i_auth.key = _(sai->i_auth.key); sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data); + sa->last_init_msg_id = sai->last_init_msg_id; 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 _ @@ -441,7 +486,7 @@ ikev2_calc_keys (ikev2_sa_t * sa) /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */ u8 *skeyseed = 0; u8 *s = 0; - u16 integ_key_len = 0; + u16 integ_key_len = 0, salt_len = 0; ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ; tr_encr = ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR); @@ -452,6 +497,8 @@ ikev2_calc_keys (ikev2_sa_t * sa) if (tr_integ) integ_key_len = tr_integ->key_len; + else + salt_len = sizeof (u32); vec_append (s, sa->i_nonce); vec_append (s, sa->r_nonce); @@ -469,7 +516,8 @@ ikev2_calc_keys (ikev2_sa_t * sa) int len = tr_prf->key_trunc + /* SK_d */ integ_key_len * 2 + /* SK_ai, SK_ar */ tr_encr->key_len * 2 + /* SK_ei, SK_er */ - tr_prf->key_len * 2; /* SK_pi, SK_pr */ + tr_prf->key_len * 2 + /* SK_pi, SK_pr */ + salt_len * 2; keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len); vec_free (skeyseed); @@ -496,14 +544,14 @@ ikev2_calc_keys (ikev2_sa_t * sa) } /* SK_ei */ - sa->sk_ei = vec_new (u8, tr_encr->key_len); - clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len); - pos += tr_encr->key_len; + sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len); + clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len); + pos += tr_encr->key_len + salt_len; /* SK_er */ - sa->sk_er = vec_new (u8, tr_encr->key_len); - clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len); - pos += tr_encr->key_len; + sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len); + clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len); + pos += tr_encr->key_len + salt_len; /* SK_pi */ sa->sk_pi = vec_new (u8, tr_prf->key_len); @@ -516,6 +564,7 @@ ikev2_calc_keys (ikev2_sa_t * sa) pos += tr_prf->key_len; vec_free (keymat); + sa->keys_generated = 1; } static void @@ -589,53 +638,142 @@ ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child) vec_free (keymat); } -static void -ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa, - ike_header_t * ike) +static_always_inline u8 * +ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, ip_address_t * ia, u16 port) +{ + const u32 max_buf_size = + sizeof (ispi) + sizeof (rspi) + sizeof (ip6_address_t) + sizeof (u16); + u8 buf[max_buf_size]; + 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_addr_bytes (ia), ip_address_size (ia)); + clib_memcpy_fast (&buf[8 + 8 + ip_address_size (ia)], &port, sizeof (port)); + SHA1 (buf, 2 * sizeof (ispi) + sizeof (port) + ip_address_size (ia), res); + return res; +} + +static int +ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa, + u8 ** ke_data) +{ + const ike_ke_payload_header_t *ke = p; + u16 plen = clib_net_to_host_u16 (ke->length); + ASSERT (plen >= sizeof (*ke) && plen <= rlen); + if (sizeof (*ke) > rlen) + return 0; + + sa->dh_group = clib_net_to_host_u16 (ke->dh_group); + vec_reset_length (ke_data[0]); + vec_add (ke_data[0], ke->payload, plen - sizeof (*ke)); + return 1; +} + +static int +ikev2_parse_nonce_payload (const void *p, u32 rlen, u8 * nonce) +{ + const ike_payload_header_t *ikep = p; + u16 plen = clib_net_to_host_u16 (ikep->length); + ASSERT (plen >= sizeof (*ikep) && plen <= rlen); + clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep)); + return 1; +} + +static int +ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen, + u16 * plen) +{ + if (sizeof (*ikep) > rlen) + return 0; + *plen = clib_net_to_host_u16 (ikep->length); + if (*plen < sizeof (*ikep) || *plen > rlen) + return 0; + return 1; +} + +static int +ikev2_process_sa_init_req (vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike, + udp_header_t *udp, u32 len, u32 sw_if_index) { + u8 nonce[IKEV2_NONCE_SIZE]; int p = 0; - u32 len = clib_net_to_host_u32 (ike->length); u8 payload = ike->nextpayload; + ike_payload_header_t *ikep; + u16 plen; ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received " - "from %d.%d.%d.%d", - clib_net_to_host_u64 (ike->ispi), - clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32); + "from ", clib_net_to_host_u64 (ike->ispi), + clib_net_to_host_u64 (ike->rspi), + ip_addr_v4 (&sa->iaddr).as_u32, + ip_addr_version (&sa->iaddr) == AF_IP4); sa->ispi = clib_net_to_host_u64 (ike->ispi); + sa->sw_if_index = sw_if_index; /* store whole IKE payload - needed for PSK auth */ - vec_free (sa->last_sa_init_req_packet_data); + vec_reset_length (sa->last_sa_init_req_packet_data); vec_add (sa->last_sa_init_req_packet_data, ike, len); + if (len < sizeof (*ike)) + return 0; + + len -= sizeof (*ike); while (p < len && payload != IKEV2_PAYLOAD_NONE) { - ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p]; - u32 plen = clib_net_to_host_u16 (ikep->length); - - if (plen < sizeof (ike_payload_header_t)) - return; + ikep = (ike_payload_header_t *) & ike->payload[p]; + int current_length = len - p; + if (!ikev2_check_payload_length (ikep, current_length, &plen)) + return 0; if (payload == IKEV2_PAYLOAD_SA) { ikev2_sa_free_proposal_vector (&sa->i_proposals); - sa->i_proposals = ikev2_parse_sa_payload (ikep); + sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length); } else if (payload == IKEV2_PAYLOAD_KE) { - ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep; - sa->dh_group = clib_net_to_host_u16 (ke->dh_group); - vec_free (sa->i_dh_data); - vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke)); + if (!ikev2_parse_ke_payload (ikep, current_length, sa, + &sa->i_dh_data)) + return 0; } else if (payload == IKEV2_PAYLOAD_NONCE) { - vec_free (sa->i_nonce); - vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)); + vec_reset_length (sa->i_nonce); + if (ikev2_parse_nonce_payload (ikep, current_length, nonce)) + vec_add (sa->i_nonce, nonce, plen - sizeof (*ikep)); } else if (payload == IKEV2_PAYLOAD_NOTIFY) { - ikev2_notify_t *n = ikev2_parse_notify_payload (ikep); + ikev2_notify_t *n = + ikev2_parse_notify_payload (ikep, current_length); + if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP) + { + u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr, + udp->src_port); + if (clib_memcmp (src_sha, n->data, vec_len (src_sha))) + { + if (sa->natt_state == IKEV2_NATT_ENABLED) + sa->natt_state = IKEV2_NATT_ACTIVE; + 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 (ike->ispi, 0, &sa->raddr, + udp->dst_port); + if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha))) + { + if (sa->natt_state == IKEV2_NATT_ENABLED) + sa->natt_state = IKEV2_NATT_ACTIVE; + 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) @@ -650,7 +788,7 @@ ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa, { ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE); sa->unsupported_cp = payload; - return; + return 0; } } @@ -659,39 +797,47 @@ ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa, } ikev2_set_state (sa, IKEV2_STATE_SA_INIT); + return 1; } static void -ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa, - ike_header_t * ike) +ikev2_process_sa_init_resp (vlib_main_t * vm, + ikev2_sa_t * sa, ike_header_t * ike, + udp_header_t * udp, u32 len) { + u8 nonce[IKEV2_NONCE_SIZE]; int p = 0; - u32 len = clib_net_to_host_u32 (ike->length); u8 payload = ike->nextpayload; + ike_payload_header_t *ikep; + u16 plen; sa->ispi = clib_net_to_host_u64 (ike->ispi); sa->rspi = clib_net_to_host_u64 (ike->rspi); ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received " - "from %d.%d.%d.%d", sa->ispi, sa->rspi, - sa->raddr.as_u32); + "from ", sa->ispi, sa->rspi, + ip_addr_v4 (&sa->raddr).as_u32, + ip_addr_version (&sa->raddr) == AF_IP4); /* store whole IKE payload - needed for PSK auth */ - vec_free (sa->last_sa_init_res_packet_data); + vec_reset_length (sa->last_sa_init_res_packet_data); vec_add (sa->last_sa_init_res_packet_data, ike, len); + if (sizeof (*ike) > len) + return; + + len -= sizeof (*ike); while (p < len && payload != IKEV2_PAYLOAD_NONE) { - ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p]; - u32 plen = clib_net_to_host_u16 (ikep->length); - - if (plen < sizeof (ike_payload_header_t)) + int current_length = len - p; + ikep = (ike_payload_header_t *) & ike->payload[p]; + if (!ikev2_check_payload_length (ikep, current_length, &plen)) return; if (payload == IKEV2_PAYLOAD_SA) { ikev2_sa_free_proposal_vector (&sa->r_proposals); - sa->r_proposals = ikev2_parse_sa_payload (ikep); + sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length); if (sa->r_proposals) { ikev2_set_state (sa, IKEV2_STATE_SA_INIT); @@ -701,19 +847,47 @@ ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa, } else if (payload == IKEV2_PAYLOAD_KE) { - ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep; - sa->dh_group = clib_net_to_host_u16 (ke->dh_group); - vec_free (sa->r_dh_data); - vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke)); + if (!ikev2_parse_ke_payload (ikep, current_length, sa, + &sa->r_dh_data)) + return; } else if (payload == IKEV2_PAYLOAD_NONCE) { - vec_free (sa->r_nonce); - vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep)); + vec_reset_length (sa->r_nonce); + if (ikev2_parse_nonce_payload (ikep, current_length, nonce)) + vec_add (sa->r_nonce, nonce, plen - sizeof (*ikep)); } else if (payload == IKEV2_PAYLOAD_NOTIFY) { - ikev2_notify_t *n = ikev2_parse_notify_payload (ikep); + ikev2_notify_t *n = + ikev2_parse_notify_payload (ikep, current_length); + if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP) + { + u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi, + &sa->raddr, + 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, + udp->dst_port); + if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha))) + { + if (sa->natt_state == IKEV2_NATT_ENABLED) + sa->natt_state = IKEV2_NATT_ACTIVE; + 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) @@ -738,25 +912,36 @@ ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa, } static u8 * -ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload) +ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, + u8 * payload, u32 rlen, u32 * out_len) { + ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data (); int p = 0; - u8 last_payload = 0; - u8 *hmac = 0; - u32 len = clib_net_to_host_u32 (ike->length); + u8 last_payload = 0, *hmac = 0, *plaintext = 0; ike_payload_header_t *ikep = 0; - u32 plen = 0; + u16 plen = 0; + u32 dlen = 0; ikev2_sa_transform_t *tr_integ; + ikev2_sa_transform_t *tr_encr; tr_integ = ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG); + tr_encr = + ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR); + int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16; + + if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er)) + return 0; + + if (rlen <= sizeof (*ike)) + return 0; + int len = rlen - sizeof (*ike); while (p < len && *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK) { ikep = (ike_payload_header_t *) & ike->payload[p]; - plen = clib_net_to_host_u16 (ikep->length); - - if (plen < sizeof (*ikep)) + int current_length = len - p; + if (!ikev2_check_payload_length (ikep, current_length, &plen)) return 0; if (*payload == IKEV2_PAYLOAD_SK) @@ -784,56 +969,102 @@ ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload) return 0; } - hmac = - ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai, - (u8 *) ike, len - tr_integ->key_trunc); + if (is_aead) + { + if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE) + return 0; - plen = plen - sizeof (*ikep) - tr_integ->key_trunc; + plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE; + u8 *aad = (u8 *) ike; + u32 aad_len = ikep->payload - aad; + u8 *tag = ikep->payload + plen; - if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc)) + int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload, + plen, aad, aad_len, tag, &dlen); + if (rc) + { + *out_len = dlen; + plaintext = ikep->payload + IKEV2_GCM_IV_SIZE; + } + } + else { - ikev2_elog_error ("message integrity check failed"); + if (rlen < tr_integ->key_trunc) + return 0; + + hmac = + ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai, + (u8 *) ike, rlen - tr_integ->key_trunc); + + if (plen < sizeof (*ikep) + tr_integ->key_trunc) + return 0; + + plen = plen - sizeof (*ikep) - tr_integ->key_trunc; + + if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc)) + { + ikev2_elog_error ("message integrity check failed"); + vec_free (hmac); + return 0; + } vec_free (hmac); - return 0; + + int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen, + &dlen); + if (rc) + { + *out_len = dlen; + plaintext = ikep->payload + tr_encr->block_size; + } } - vec_free (hmac); - return ikev2_decrypt_data (sa, ikep->payload, plen); + return plaintext; +} + +static_always_inline int +ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2) +{ + if (i1->type != i2->type) + return 0; + + if (vec_len (i1->data) != vec_len (i2->data)) + return 0; + + if (clib_memcmp (i1->data, i2->data, vec_len (i1->data))) + return 0; + + return 1; } static void -ikev2_initial_contact_cleanup (ikev2_sa_t * sa) +ikev2_initial_contact_cleanup_internal (ikev2_main_per_thread_data_t * ptd, + ikev2_sa_t * sa) { ikev2_main_t *km = &ikev2_main; ikev2_sa_t *tmp; u32 i, *delete = 0; ikev2_child_sa_t *c; - u32 thread_index = vlib_get_thread_index (); - - if (!sa->initial_contact) - return; /* find old IKE SAs with the same authenticated identity */ /* *INDENT-OFF* */ - pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({ - if (tmp->i_id.type != sa->i_id.type || - vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) || - memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data))) - continue; - - if (sa->rspi != tmp->rspi) - vec_add1(delete, tmp - km->per_thread_data[thread_index].sas); - })); + pool_foreach (tmp, ptd->sas) { + if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id) + || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id)) + continue; + + if (sa->rspi != tmp->rspi) + vec_add1(delete, tmp - ptd->sas); + } /* *INDENT-ON* */ for (i = 0; i < vec_len (delete); i++) { - tmp = - pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]); - vec_foreach (c, - tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main, - tmp, c); - ikev2_delete_sa (tmp); + tmp = pool_elt_at_index (ptd->sas, delete[i]); + vec_foreach (c, tmp->childs) + { + ikev2_delete_tunnel_interface (km->vnet_main, tmp, c); + } + ikev2_delete_sa (ptd, tmp); } vec_free (delete); @@ -841,30 +1072,85 @@ ikev2_initial_contact_cleanup (ikev2_sa_t * sa) } static void -ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) +ikev2_initial_contact_cleanup (ikev2_main_per_thread_data_t * ptd, + ikev2_sa_t * sa) +{ + ikev2_main_t *km = &ikev2_main; + + if (!sa->initial_contact) + return; + + if (ptd) + { + ikev2_initial_contact_cleanup_internal (ptd, sa); + } + else + { + vec_foreach (ptd, km->per_thread_data) + ikev2_initial_contact_cleanup_internal (ptd, sa); + } + sa->initial_contact = 0; +} + +static int +ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id) +{ + const ike_id_payload_header_t *id = p; + u16 plen = clib_net_to_host_u16 (id->length); + if (plen < sizeof (*id) || plen > rlen) + return 0; + + sa_id->type = id->id_type; + vec_reset_length (sa_id->data); + vec_add (sa_id->data, id->payload, plen - sizeof (*id)); + + return 1; +} + +static int +ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a) +{ + const ike_auth_payload_header_t *ah = p; + u16 plen = clib_net_to_host_u16 (ah->length); + + a->method = ah->auth_method; + vec_reset_length (a->data); + vec_add (a->data, ah->payload, plen - sizeof (*ah)); + return 1; +} + +static int +ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, + ike_header_t * ike, u32 len) { - ikev2_child_sa_t *first_child_sa; int p = 0; + ikev2_child_sa_t *first_child_sa; u8 payload = ike->nextpayload; u8 *plaintext = 0; ike_payload_header_t *ikep; - u32 plen; + u16 plen; + u32 dlen = 0; ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received " - "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi), + "from ", clib_host_to_net_u64 (ike->ispi), clib_host_to_net_u64 (ike->rspi), - sa->is_initiator ? sa->raddr.as_u32 : sa-> - iaddr.as_u32); + sa->is_initiator ? + ip_addr_v4 (&sa->raddr).as_u32 : + ip_addr_v4 (&sa->iaddr).as_u32, + ip_addr_version (&sa->raddr) == AF_IP4); ikev2_calc_keys (sa); - plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload); + plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen); if (!plaintext) { if (sa->unsupported_cp) - ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE); - goto cleanup_and_exit; + { + ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE); + return 0; + } + goto malformed; } /* select or create 1st child SA */ @@ -880,64 +1166,57 @@ ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) /* process encrypted payload */ - p = 0; - while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE) + while (p < dlen && payload != IKEV2_PAYLOAD_NONE) { ikep = (ike_payload_header_t *) & plaintext[p]; - plen = clib_net_to_host_u16 (ikep->length); - - if (plen < sizeof (ike_payload_header_t)) - goto cleanup_and_exit; + int current_length = dlen - p; + if (!ikev2_check_payload_length (ikep, current_length, &plen)) + goto malformed; if (payload == IKEV2_PAYLOAD_SA) /* 33 */ { if (sa->is_initiator) { ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals); - first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep); + first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep, + current_length); } else { ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals); - first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep); + first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep, + current_length); } } else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */ { - ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep; - - sa->i_id.type = id->id_type; - vec_free (sa->i_id.data); - vec_add (sa->i_id.data, id->payload, plen - sizeof (*id)); + if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id)) + goto malformed; } else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */ { - ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep; - - sa->r_id.type = id->id_type; - vec_free (sa->r_id.data); - vec_add (sa->r_id.data, id->payload, plen - sizeof (*id)); + if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id)) + goto malformed; } else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */ { - ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep; - if (sa->is_initiator) { - sa->r_auth.method = a->auth_method; - vec_free (sa->r_auth.data); - vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a)); + if (!ikev2_parse_auth_payload (ikep, current_length, + &sa->r_auth)) + goto malformed; } else { - sa->i_auth.method = a->auth_method; - vec_free (sa->i_auth.data); - vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a)); + if (!ikev2_parse_auth_payload (ikep, current_length, + &sa->i_auth)) + goto malformed; } } else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */ { - ikev2_notify_t *n = ikev2_parse_notify_payload (ikep); + ikev2_notify_t *n = + ikev2_parse_notify_payload (ikep, current_length); if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT) { sa->initial_contact = 1; @@ -951,12 +1230,12 @@ ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */ { vec_free (first_child_sa->tsi); - first_child_sa->tsi = ikev2_parse_ts_payload (ikep); + first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length); } else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */ { vec_free (first_child_sa->tsr); - first_child_sa->tsr = ikev2_parse_ts_payload (ikep); + first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length); } else { @@ -967,7 +1246,7 @@ ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) { ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE); sa->unsupported_cp = payload; - return; + return 0; } } @@ -975,50 +1254,62 @@ ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) p += plen; } -cleanup_and_exit: - vec_free (plaintext); + return 1; + +malformed: + ikev2_set_state (sa, IKEV2_STATE_DELETED, ": malformed IKE_AUTH"); + return 0; } -static void -ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa, - ike_header_t * ike) +static int +ikev2_process_informational_req (vlib_main_t * vm, + ikev2_sa_t * sa, ike_header_t * ike, u32 len) { int p = 0; u8 payload = ike->nextpayload; u8 *plaintext = 0; ike_payload_header_t *ikep; - u32 plen; + u32 dlen = 0; + ikev2_notify_t *n = 0; 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); + "from ", clib_host_to_net_u64 (ike->ispi), + clib_host_to_net_u64 (ike->rspi), + ip_addr_v4 (&sa->iaddr).as_u32, + ip_addr_version (&sa->iaddr) == AF_IP4); - plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload); + plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen); if (!plaintext) - goto cleanup_and_exit; + return 0; /* process encrypted payload */ p = 0; - while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE) + while (p < dlen && payload != IKEV2_PAYLOAD_NONE) { + u32 current_length = dlen - p; + if (p + sizeof (*ikep) > dlen) + return 0; + ikep = (ike_payload_header_t *) & plaintext[p]; - plen = clib_net_to_host_u16 (ikep->length); + u16 plen = clib_net_to_host_u16 (ikep->length); - if (plen < sizeof (ike_payload_header_t)) - goto cleanup_and_exit; + if (plen < sizeof (*ikep) || plen > current_length) + return 0; if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */ { - ikev2_notify_t *n = ikev2_parse_notify_payload (ikep); + n = ikev2_parse_notify_payload (ikep, current_length); + if (!n) + return 0; if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED) ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED); vec_free (n); } else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */ { - sa->del = ikev2_parse_delete_payload (ikep); + sa->del = ikev2_parse_delete_payload (ikep, current_length); } else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */ { @@ -1031,62 +1322,66 @@ ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa, if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) { sa->unsupported_cp = payload; - return; + return 0; } } - payload = ikep->nextpayload; p += plen; } - -cleanup_and_exit: - vec_free (plaintext); + return 1; } -static void -ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, - ike_header_t * ike) +static int +ikev2_process_create_child_sa_req (vlib_main_t * vm, + ikev2_sa_t * sa, ike_header_t * ike, + u32 len) { int p = 0; u8 payload = ike->nextpayload; u8 *plaintext = 0; u8 rekeying = 0; u8 nonce[IKEV2_NONCE_SIZE]; - + ikev2_rekey_t *rekey; ike_payload_header_t *ikep; - u32 plen; ikev2_notify_t *n = 0; ikev2_ts_t *tsi = 0; ikev2_ts_t *tsr = 0; ikev2_sa_proposal_t *proposal = 0; ikev2_child_sa_t *child_sa; + u32 dlen = 0, src; + u16 plen; + + if (sa->is_initiator) + src = ip_addr_v4 (&sa->raddr).as_u32; + else + src = ip_addr_v4 (&sa->iaddr).as_u32; - ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received " - "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi), - clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32); + ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received from", + clib_host_to_net_u64 (ike->ispi), + clib_host_to_net_u64 (ike->rspi), src, + ip_addr_version (&sa->raddr) == AF_IP4); - plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload); + plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen); if (!plaintext) goto cleanup_and_exit; /* process encrypted payload */ p = 0; - while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE) + while (payload != IKEV2_PAYLOAD_NONE) { ikep = (ike_payload_header_t *) & plaintext[p]; - plen = clib_net_to_host_u16 (ikep->length); - - if (plen < sizeof (ike_payload_header_t)) + int current_length = dlen - p; + if (!ikev2_check_payload_length (ikep, current_length, &plen)) goto cleanup_and_exit; - else if (payload == IKEV2_PAYLOAD_SA) + if (payload == IKEV2_PAYLOAD_SA) { - proposal = ikev2_parse_sa_payload (ikep); + proposal = ikev2_parse_sa_payload (ikep, current_length); } else if (payload == IKEV2_PAYLOAD_NOTIFY) { - n = ikev2_parse_notify_payload (ikep); + n = ikev2_parse_notify_payload (ikep, current_length); if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA) { rekeying = 1; @@ -1094,7 +1389,7 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, } else if (payload == IKEV2_PAYLOAD_DELETE) { - sa->del = ikev2_parse_delete_payload (ikep); + sa->del = ikev2_parse_delete_payload (ikep, current_length); } else if (payload == IKEV2_PAYLOAD_VENDOR) { @@ -1102,15 +1397,15 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, } else if (payload == IKEV2_PAYLOAD_NONCE) { - clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep)); + ikev2_parse_nonce_payload (ikep, current_length, nonce); } else if (payload == IKEV2_PAYLOAD_TSI) { - tsi = ikev2_parse_ts_payload (ikep); + tsi = ikev2_parse_ts_payload (ikep, current_length); } else if (payload == IKEV2_PAYLOAD_TSR) { - tsr = ikev2_parse_ts_payload (ikep); + tsr = ikev2_parse_ts_payload (ikep, current_length); } else { @@ -1119,17 +1414,21 @@ 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; } } - payload = ikep->nextpayload; p += plen; } - if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP) + if (!proposal || proposal->protocol_id != IKEV2_PROTOCOL_ESP) + goto cleanup_and_exit; + + if (sa->is_initiator) { - ikev2_rekey_t *rekey = &sa->rekey[0]; + rekey = sa->rekey; + if (vec_len (rekey) == 0) + goto cleanup_and_exit; rekey->protocol_id = proposal->protocol_id; rekey->i_proposal = ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP); @@ -1138,7 +1437,7 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, rekey->tsi = tsi; rekey->tsr = tsr; /* update Nr */ - vec_free (sa->r_nonce); + vec_reset_length (sa->r_nonce); vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE); child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1); if (child_sa) @@ -1146,36 +1445,56 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, child_sa->rekey_retries = 0; } } - else if (rekeying) + else { - ikev2_rekey_t *rekey; - child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1); - if (!child_sa) + if (rekeying) + { + child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1); + if (!child_sa) + { + ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found", + n->spi); + goto cleanup_and_exit; + } + vec_add2 (sa->rekey, rekey, 1); + rekey->protocol_id = n->protocol_id; + rekey->spi = n->spi; + rekey->i_proposal = proposal; + rekey->r_proposal = + ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP); + /* update Ni */ + vec_reset_length (sa->i_nonce); + vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE); + /* generate new Nr */ + vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1); + RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE); + } + else { - ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found", - n->spi); - goto cleanup_and_exit; + /* create new child SA */ + vec_add2 (sa->new_child, rekey, 1); + rekey->i_proposal = proposal; + rekey->r_proposal = + ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP); + /* update Ni */ + vec_reset_length (sa->i_nonce); + vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE); + /* generate new Nr */ + vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1); + RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE); } - vec_add2 (sa->rekey, rekey, 1); - rekey->protocol_id = n->protocol_id; - rekey->spi = n->spi; - rekey->i_proposal = proposal; - rekey->r_proposal = - ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP); rekey->tsi = tsi; rekey->tsr = tsr; - /* update Ni */ - vec_free (sa->i_nonce); - vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE); - /* generate new Nr */ - vec_free (sa->r_nonce); - sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE); - RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE); } + vec_free (n); + return 1; cleanup_and_exit: - vec_free (plaintext); vec_free (n); + vec_free (proposal); + vec_free (tsr); + vec_free (tsi); + return 0; } static u8 * @@ -1226,8 +1545,8 @@ ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2) { if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id && ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port && - ts1->start_addr.as_u32 == ts2->start_addr.as_u32 && - ts1->end_addr.as_u32 == ts2->end_addr.as_u32) + !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) && + !ip_address_cmp (&ts1->end_addr, &ts2->end_addr)) return 1; return 0; @@ -1239,30 +1558,33 @@ ikev2_sa_match_ts (ikev2_sa_t * sa) ikev2_main_t *km = &ikev2_main; ikev2_profile_t *p; ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0; - ikev2_id_t *id; + ikev2_id_t *id_rem, *id_loc; /* *INDENT-OFF* */ - pool_foreach (p, km->profiles, ({ + pool_foreach (p, km->profiles) { if (sa->is_initiator) { p_tsi = &p->loc_ts; p_tsr = &p->rem_ts; - id = &sa->r_id; + id_rem = &sa->r_id; + id_loc = &sa->i_id; } else { p_tsi = &p->rem_ts; p_tsr = &p->loc_ts; - id = &sa->i_id; + id_rem = &sa->i_id; + id_loc = &sa->r_id; } /* check id */ - if (p->rem_id.type != id->type || - vec_len(p->rem_id.data) != vec_len(id->data) || - memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data))) + if (!ikev2_is_id_equal (&p->rem_id, id_rem) + || !ikev2_is_id_equal (&p->loc_id, id_loc)) continue; + sa->profile_index = p - km->profiles; + vec_foreach(ts, sa->childs[0].tsi) { if (ikev2_ts_cmp(p_tsi, ts)) @@ -1282,7 +1604,7 @@ ikev2_sa_match_ts (ikev2_sa_t * sa) } break; - })); + } /* *INDENT-ON* */ if (tsi && tsr) @@ -1300,114 +1622,132 @@ ikev2_sa_match_ts (ikev2_sa_t * sa) } } -static void -ikev2_sa_auth (ikev2_sa_t * sa) +static ikev2_profile_t * +ikev2_select_profile (ikev2_main_t *km, ikev2_sa_t *sa, + ikev2_sa_transform_t *tr_prf, u8 *key_pad) { - ikev2_main_t *km = &ikev2_main; - ikev2_profile_t *p, *sel_p = 0; - u8 *authmsg, *key_pad, *psk = 0, *auth = 0; - ikev2_sa_transform_t *tr_prf; - - tr_prf = - ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF); - - /* only shared key and rsa signature */ - if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC || - sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)) - { - ikev2_elog_uint (IKEV2_LOG_ERROR, - "unsupported authentication method %u", - sa->i_auth.method); - ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED); - return; - } + ikev2_profile_t *ret = 0, *p; + ikev2_id_t *id_rem, *id_loc; + ikev2_auth_t *sa_auth; + u8 *authmsg, *psk = 0, *auth = 0; - key_pad = format (0, "%s", IKEV2_KEY_PAD); authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator); - ikev2_id_t *sa_id; - ikev2_auth_t *sa_auth; - if (sa->is_initiator) { - sa_id = &sa->r_id; + id_rem = &sa->r_id; + id_loc = &sa->i_id; sa_auth = &sa->r_auth; } else { - sa_id = &sa->i_id; + id_rem = &sa->i_id; + id_loc = &sa->r_id; sa_auth = &sa->i_auth; } - /* *INDENT-OFF* */ - pool_foreach (p, km->profiles, ({ + pool_foreach (p, km->profiles) + { + /* check id */ + if (!ikev2_is_id_equal (&p->rem_id, id_rem) || + !ikev2_is_id_equal (&p->loc_id, id_loc)) + continue; - /* check id */ - if (p->rem_id.type != sa_id->type || - vec_len(p->rem_id.data) != vec_len(sa_id->data) || - memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data))) - continue; + if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) + { + if (!p->auth.data || + p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC) + continue; - if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) - { - if (!p->auth.data || - p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC) - continue; + psk = ikev2_calc_prf (tr_prf, p->auth.data, key_pad); + auth = ikev2_calc_prf (tr_prf, psk, authmsg); - psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad); - auth = ikev2_calc_prf(tr_prf, psk, authmsg); + if (!clib_memcmp (auth, sa_auth->data, vec_len (sa_auth->data))) + { + ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED); + vec_free (auth); + ret = p; + break; + } + else + { + ikev2_elog_uint (IKEV2_LOG_ERROR, + "shared key mismatch! ispi %lx", sa->ispi); + } + } + else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG) + { + if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG) + continue; - if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data))) - { - ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED); - vec_free(auth); - sel_p = p; - break; - } + if (ikev2_verify_sign (p->auth.key, sa_auth->data, authmsg) == 1) + { + ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED); + ret = p; + break; + } + else + { + ikev2_elog_uint (IKEV2_LOG_ERROR, + "cert verification failed! ispi %lx", sa->ispi); + } + } + } + vec_free (authmsg); + return ret; +} - } - else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG) - { - if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG) - continue; +static void +ikev2_sa_auth (ikev2_sa_t *sa) +{ + ikev2_main_t *km = &ikev2_main; + ikev2_profile_t *sel_p = 0; + ikev2_sa_transform_t *tr_prf; + u8 *psk, *authmsg, *key_pad; - if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1) - { - ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED); - sel_p = p; - break; - } - } + tr_prf = + ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF); - vec_free(auth); - vec_free(psk); - })); - /* *INDENT-ON* */ + /* only shared key and rsa signature */ + if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC || + sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)) + { + ikev2_elog_uint (IKEV2_LOG_ERROR, "unsupported authentication method %u", + sa->i_auth.method); + ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED); + return; + } + + key_pad = format (0, "%s", IKEV2_KEY_PAD); + sel_p = ikev2_select_profile (km, sa, tr_prf, key_pad); if (sel_p) { + ASSERT (sa->state == IKEV2_STATE_AUTHENTICATED); sa->udp_encap = sel_p->udp_encap; - sa->dst_port = sel_p->dst_port; - } - vec_free (authmsg); + sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port; - if (sa->state == IKEV2_STATE_AUTHENTICATED) - { if (!sa->is_initiator) { vec_free (sa->r_id.data); sa->r_id.data = vec_dup (sel_p->loc_id.data); sa->r_id.type = sel_p->loc_id.type; + sa->i_id.data = vec_dup (sel_p->rem_id.data); + sa->i_id.type = sel_p->rem_id.type; /* generate our auth data */ authmsg = ikev2_sa_generate_authmsg (sa, 1); if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) { + vec_free (sa->r_auth.data); + psk = ikev2_calc_prf (tr_prf, sel_p->auth.data, key_pad); sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg); sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC; + vec_free (psk); } else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG) { + vec_free (sa->r_auth.data); sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg); sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG; } @@ -1432,16 +1772,14 @@ ikev2_sa_auth (ikev2_sa_t * sa) "profile found! ispi %lx", sa->ispi); ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED); } - vec_free (psk); vec_free (key_pad); } - 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 = @@ -1458,26 +1796,24 @@ ikev2_sa_auth_init (ikev2_sa_t * sa) return; } - 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) { + key_pad = format (0, "%s", IKEV2_KEY_PAD); + psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad); + vec_free (sa->i_auth.data); sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg); sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC; + vec_free (psk); + vec_free (key_pad); } else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG) { + vec_free (sa->i_auth.data); sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg); sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG; } - - vec_free (psk); - vec_free (key_pad); - vec_free (auth); vec_free (authmsg); } @@ -1505,11 +1841,13 @@ typedef struct u32 remote_spi; ipsec_crypto_alg_t encr_type; ipsec_integ_alg_t integ_type; - ip46_address_t local_ip; - ip46_address_t remote_ip; + ip_address_t local_ip; + ip_address_t remote_ip; 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; @@ -1519,12 +1857,32 @@ ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a) ikev2_main_t *km = &ikev2_main; u32 sw_if_index; int rv = 0; + tunnel_t tun_in = { + .t_flags = TUNNEL_FLAG_NONE, + .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE, + .t_dscp = 0, + .t_mode = TUNNEL_MODE_P2P, + .t_table_id = 0, + .t_hop_limit = 255, + .t_src = a->local_ip, + .t_dst = a->remote_ip, + }; + tunnel_t tun_out = { + .t_flags = TUNNEL_FLAG_NONE, + .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE, + .t_dscp = 0, + .t_mode = TUNNEL_MODE_P2P, + .t_table_id = 0, + .t_hop_limit = 255, + .t_src = a->remote_ip, + .t_dst = a->local_ip, + }; if (~0 == a->sw_if_index) { /* no tunnel associated with the SA/profile - create a new one */ - rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0, - &a->local_ip, &a->remote_ip, 0, + rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0, &ip_addr_46 (&a->local_ip), + &ip_addr_46 (&a->remote_ip), 0, TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0, TUNNEL_MODE_P2P, &sw_if_index); @@ -1544,9 +1902,9 @@ ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a) if (rv) { - ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! " - "loc:%d.%d.%d.%d rem:%d.%d.%d.%d", - a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32); + ikev2_elog_uint (IKEV2_LOG_ERROR, + "installing ipip tunnel failed! local spi: %x", + a->local_spi); return; } @@ -1563,29 +1921,42 @@ ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a) vec_add1 (sas_in, a->old_remote_sa_id); } - rv |= ipsec_sa_add_and_lock (a->local_sa_id, - a->local_spi, - 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->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->dst_port); - - rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in); + rv = ipsec_sa_add_and_lock (a->local_sa_id, a->local_spi, IPSEC_PROTOCOL_ESP, + a->encr_type, &a->loc_ckey, a->integ_type, + &a->loc_ikey, a->flags, a->salt_local, + a->src_port, a->dst_port, &tun_out, NULL); + if (rv) + goto err0; + + 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), a->salt_remote, + a->ipsec_over_udp_port, a->ipsec_over_udp_port, &tun_in, NULL); + if (rv) + goto err1; + + rv = ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in); + if (rv) + goto err2; + + return; + +err2: + ipsec_sa_unlock_id (a->remote_sa_id); +err1: + ipsec_sa_unlock_id (a->local_sa_id); +err0: + vec_free (sas_in); } static int -ikev2_create_tunnel_interface (vnet_main_t * vnm, - u32 thread_index, +ikev2_create_tunnel_interface (vlib_main_t * vm, ikev2_sa_t * sa, ikev2_child_sa_t * child, u32 sa_index, u32 child_index, u8 is_rekey) { + u32 thread_index = vlib_get_thread_index (); ikev2_main_t *km = &ikev2_main; ipsec_crypto_alg_t encr_type; ipsec_integ_alg_t integ_type; @@ -1605,17 +1976,17 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, if (sa->is_initiator) { - ip46_address_set_ip4 (&a.local_ip, &sa->iaddr); - ip46_address_set_ip4 (&a.remote_ip, &sa->raddr); - proposals = child->i_proposals; + ip_address_copy (&a.local_ip, &sa->iaddr); + ip_address_copy (&a.remote_ip, &sa->raddr); + proposals = child->r_proposals; a.local_spi = child->r_proposals[0].spi; a.remote_spi = child->i_proposals[0].spi; } else { - ip46_address_set_ip4 (&a.local_ip, &sa->raddr); - ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr); - proposals = child->r_proposals; + ip_address_copy (&a.local_ip, &sa->raddr); + ip_address_copy (&a.remote_ip, &sa->iaddr); + proposals = child->i_proposals; a.local_spi = child->i_proposals[0].spi; a.remote_spi = child->r_proposals[0].spi; } @@ -1626,6 +1997,8 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, a.flags |= IPSEC_SA_FLAG_IS_TUNNEL; a.flags |= IPSEC_SA_FLAG_UDP_ENCAP; } + if (ikev2_natt_active (sa)) + a.flags |= IPSEC_SA_FLAG_UDP_ENCAP; a.is_rekey = is_rekey; tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN); @@ -1737,6 +2110,7 @@ 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 { @@ -1749,15 +2123,17 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, a.salt_remote = child->salt_ei; a.salt_local = child->salt_er; } + a.dst_port = + ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port; + a.src_port = sa->ipsec_over_udp_port; } - if (sa->is_profile_index_set) + if (sa->is_initiator && sa->profile_index != ~0) p = pool_elt_at_index (km->profiles, sa->profile_index); 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 @@ -1765,7 +2141,7 @@ 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); @@ -1810,7 +2186,7 @@ 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.dst_port = sa->dst_port; + 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)); @@ -1890,13 +2266,13 @@ ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa, if (sa->is_initiator) { - ip46_address_set_ip4 (&a.local_ip, &sa->iaddr); - ip46_address_set_ip4 (&a.remote_ip, &sa->raddr); + ip_address_to_46 (&sa->iaddr, &a.local_ip); + ip_address_to_46 (&sa->raddr, &a.remote_ip); } else { - ip46_address_set_ip4 (&a.local_ip, &sa->raddr); - ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr); + ip_address_to_46 (&sa->raddr, &a.local_ip); + ip_address_to_46 (&sa->iaddr, &a.remote_ip); } a.remote_sa_id = child->remote_sa_id; @@ -1909,8 +2285,11 @@ 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 (vlib_buffer_t *b, ikev2_sa_t *sa, ike_header_t *ike, + void *user, udp_header_t *udp, ikev2_stats_t *stats) { + ikev2_main_t *km = &ikev2_main; + u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main); v8 *integ = 0; ike_payload_header_t *ph; u16 plen; @@ -1963,10 +2342,29 @@ 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), + &sa->raddr, 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, 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) @@ -1974,6 +2372,7 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) if (sa->state == IKEV2_STATE_AUTHENTICATED) { ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR); + ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI); ikev2_payload_add_auth (chain, &sa->r_auth); ikev2_payload_add_sa (chain, sa->childs[0].r_proposals); ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI); @@ -2015,6 +2414,7 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) else if (sa->state == IKEV2_STATE_SA_INIT) { ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI); + ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR); ikev2_payload_add_auth (chain, &sa->i_auth); ikev2_payload_add_sa (chain, sa->childs[0].i_proposals); ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI); @@ -2024,7 +2424,7 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) } else { - ikev2_set_state (sa, IKEV2_STATE_DELETED); + ikev2_set_state (sa, IKEV2_STATE_DELETED, ": unexpected IKE_AUTH"); goto done; } } @@ -2035,7 +2435,7 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) { if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE) { - if (sa->is_initiator) + if (ike_hdr_is_request (ike)) ikev2_payload_add_delete (chain, sa->del); /* The response to a request that deletes the IKE SA is an empty @@ -2054,7 +2454,7 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) /* received N(AUTHENTICATION_FAILED) */ else if (sa->state == IKEV2_STATE_AUTH_FAILED) { - ikev2_set_state (sa, IKEV2_STATE_DELETED); + ikev2_set_state (sa, IKEV2_STATE_DELETED, ": auth failed"); goto done; } /* received unsupported critical payload */ @@ -2069,7 +2469,16 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) vec_free (data); sa->unsupported_cp = 0; } - /* else send empty response */ + else + /* else send empty response */ + { + if (ike_hdr_is_response (ike)) + { + ASSERT (stats != 0); + stats->n_keepalives++; + sa->stats.n_keepalives++; + } + } } else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA) { @@ -2093,35 +2502,38 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) vec_free (data); } + else if (vec_len (sa->rekey) > 0) + { + ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal); + ikev2_payload_add_nonce (chain, sa->r_nonce); + ikev2_payload_add_ts (chain, sa->rekey[0].tsi, IKEV2_PAYLOAD_TSI); + ikev2_payload_add_ts (chain, sa->rekey[0].tsr, IKEV2_PAYLOAD_TSR); + vec_del1 (sa->rekey, 0); + } + else if (vec_len (sa->new_child) > 0) + { + ikev2_payload_add_sa (chain, sa->new_child[0].r_proposal); + ikev2_payload_add_nonce (chain, sa->r_nonce); + ikev2_payload_add_ts (chain, sa->new_child[0].tsi, + IKEV2_PAYLOAD_TSI); + ikev2_payload_add_ts (chain, sa->new_child[0].tsr, + IKEV2_PAYLOAD_TSR); + vec_del1 (sa->new_child, 0); + } + else if (sa->unsupported_cp) + { + u8 *data = vec_new (u8, 1); + + data[0] = sa->unsupported_cp; + ikev2_payload_add_notify ( + chain, IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD, data); + vec_free (data); + sa->unsupported_cp = 0; + } else { - if (sa->rekey) - { - ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal); - ikev2_payload_add_nonce (chain, sa->r_nonce); - ikev2_payload_add_ts (chain, sa->rekey[0].tsi, - IKEV2_PAYLOAD_TSI); - ikev2_payload_add_ts (chain, sa->rekey[0].tsr, - IKEV2_PAYLOAD_TSR); - vec_del1 (sa->rekey, 0); - } - else if (sa->unsupported_cp) - { - u8 *data = vec_new (u8, 1); - - data[0] = sa->unsupported_cp; - ikev2_payload_add_notify (chain, - IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD, - data); - vec_free (data); - sa->unsupported_cp = 0; - } - else - { - ikev2_payload_add_notify (chain, - IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS, - 0); - } + ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS, + 0); } } @@ -2129,31 +2541,31 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) ike->version = IKE_VERSION_2; ike->nextpayload = IKEV2_PAYLOAD_SK; tlen = sizeof (*ike); - if (sa->is_initiator) - { - ike->flags = IKEV2_HDR_FLAG_INITIATOR; - sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid); - } - else - { - ike->flags = IKEV2_HDR_FLAG_RESPONSE; - } + if (sa->is_initiator) + ike->flags |= IKEV2_HDR_FLAG_INITIATOR; if (ike->exchange == IKEV2_EXCHANGE_SA_INIT) { tlen += vec_len (chain->data); ike->nextpayload = chain->first_payload_type; ike->length = clib_host_to_net_u32 (tlen); + + if (tlen + b->current_length + b->current_data > buffer_data_size) + { + tlen = ~0; + goto done; + } + clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data)); /* store whole IKE payload - needed for PSK auth */ - vec_free (sa->last_sa_init_res_packet_data); + vec_reset_length (sa->last_sa_init_res_packet_data); vec_add (sa->last_sa_init_res_packet_data, ike, tlen); } else { - + ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data (); ikev2_payload_chain_add_padding (chain, tr_encr->block_size); /* SK payload */ @@ -2161,27 +2573,58 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) ph = (ike_payload_header_t *) & ike->payload[0]; ph->nextpayload = chain->first_payload_type; ph->flags = 0; - int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload); - plen += enc_len; - - /* add space for hmac */ - plen += tr_integ->key_trunc; + int is_aead = + tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16; + int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size; + plen += vec_len (chain->data) + iv_len; + + /* add space for hmac/tag */ + if (tr_integ) + plen += tr_integ->key_trunc; + else + plen += IKEV2_GCM_ICV_SIZE; tlen += plen; + if (tlen + b->current_length + b->current_data > buffer_data_size) + { + tlen = ~0; + goto done; + } + /* payload and total length */ ph->length = clib_host_to_net_u16 (plen); ike->length = clib_host_to_net_u32 (tlen); - /* calc integrity data for whole packet except hash itself */ - integ = - ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar, - (u8 *) ike, tlen - tr_integ->key_trunc); - - clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc - - sizeof (*ike), integ, tr_integ->key_trunc); + if (is_aead) + { + if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data, + ph->payload, (u8 *) ike, + sizeof (*ike) + sizeof (*ph), + ph->payload + plen - sizeof (*ph) - + IKEV2_GCM_ICV_SIZE)) + { + tlen = ~0; + goto done; + } + } + else + { + if (!ikev2_encrypt_data + (ptd, sa, tr_encr, chain->data, ph->payload)) + { + tlen = ~0; + goto done; + } + integ = + ikev2_calc_integr (tr_integ, + sa->is_initiator ? sa->sk_ai : sa->sk_ar, + (u8 *) ike, tlen - tr_integ->key_trunc); + clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc - + sizeof (*ike), integ, tr_integ->key_trunc); + } /* store whole IKE payload - needed for retransmit */ - vec_free (sa->last_res_packet_data); + vec_reset_length (sa->last_res_packet_data); vec_add (sa->last_res_packet_data, ike, tlen); } @@ -2191,96 +2634,117 @@ done: return tlen; } -static int -ikev2_retransmit_sa_init (ike_header_t * ike, - ip4_address_t iaddr, ip4_address_t raddr) +static u32 +ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike, + ip_address_t iaddr, ip_address_t raddr, + u32 rlen) { - ikev2_main_t *km = &ikev2_main; - ikev2_sa_t *sa; - u32 thread_index = vlib_get_thread_index (); + int p = 0; + ike_header_t *tmp; + u8 payload = ike->nextpayload; - /* *INDENT-OFF* */ - pool_foreach (sa, km->per_thread_data[thread_index].sas, ({ - if (sa->ispi == clib_net_to_host_u64(ike->ispi) && - sa->iaddr.as_u32 == iaddr.as_u32 && - sa->raddr.as_u32 == raddr.as_u32) - { - int p = 0; - u32 len = clib_net_to_host_u32(ike->length); - u8 payload = ike->nextpayload; + if (sa->ispi != clib_net_to_host_u64 (ike->ispi) || + ip_address_cmp (&sa->iaddr, &iaddr) || + ip_address_cmp (&sa->raddr, &raddr)) + { + return 0; + } - while (p < len && payload!= IKEV2_PAYLOAD_NONE) { - ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p]; - u32 plen = clib_net_to_host_u16(ikep->length); + while (p < rlen && payload != IKEV2_PAYLOAD_NONE) + { + ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p]; + u32 plen = clib_net_to_host_u16 (ikep->length); - if (plen < sizeof(ike_payload_header_t)) - return -1; + if (plen < sizeof (ike_payload_header_t)) + return ~0; - if (payload == IKEV2_PAYLOAD_NONCE) - { - if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep))) - { - /* req is retransmit */ - if (sa->state == IKEV2_STATE_SA_INIT) - { - ike_header_t * tmp; - tmp = (ike_header_t*)sa->last_sa_init_res_packet_data; - ike->ispi = tmp->ispi; - ike->rspi = tmp->rspi; - ike->nextpayload = tmp->nextpayload; - ike->version = tmp->version; - ike->exchange = tmp->exchange; - ike->flags = tmp->flags; - ike->msgid = tmp->msgid; - ike->length = tmp->length; - clib_memcpy_fast(ike->payload, tmp->payload, - clib_net_to_host_u32(tmp->length) - sizeof(*ike)); - ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, - "ispi %lx IKE_SA_INIT retransmit " - "from %d.%d.%d.%d to %d.%d.%d.%d", - ike->ispi, - raddr.as_u32, iaddr.as_u32); - return 1; - } - /* else ignore req */ - else - { - ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, - "ispi %lx IKE_SA_INIT ignore " - "from %d.%d.%d.%d to %d.%d.%d.%d", - ike->ispi, - raddr.as_u32, iaddr.as_u32); - return -1; - } - } - } - payload = ikep->nextpayload; - p+=plen; - } - } - })); + if (payload == IKEV2_PAYLOAD_NONCE && + !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep))) + { + /* req is retransmit */ + if (sa->state == IKEV2_STATE_SA_INIT) + { + sa->stats.n_init_retransmit++; + tmp = (ike_header_t *) sa->last_sa_init_res_packet_data; + u32 slen = clib_net_to_host_u32 (tmp->length); + ike->ispi = tmp->ispi; + ike->rspi = tmp->rspi; + ike->nextpayload = tmp->nextpayload; + ike->version = tmp->version; + ike->exchange = tmp->exchange; + ike->flags = tmp->flags; + ike->msgid = tmp->msgid; + ike->length = tmp->length; + clib_memcpy_fast (ike->payload, tmp->payload, + slen - sizeof (*ike)); + ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, + "ispi %lx IKE_SA_INIT retransmit " + "from %d.%d.%d.%d to %d.%d.%d.%d", + ike->ispi, + ip_addr_v4 (&raddr).as_u32, + ip_addr_v4 (&iaddr).as_u32); + return slen; + } + /* else ignore req */ + else + { + ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, + "ispi %lx IKE_SA_INIT ignore " + "from %d.%d.%d.%d to %d.%d.%d.%d", + ike->ispi, + ip_addr_v4 (&raddr).as_u32, + ip_addr_v4 (&iaddr).as_u32); + return ~0; + } + } + payload = ikep->nextpayload; + p += plen; + } + + return 0; +} + +static u32 +ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr, + ip_address_t raddr, u32 rlen) +{ + ikev2_sa_t *sa; + u32 res; + ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data (); + + /* *INDENT-OFF* */ + pool_foreach (sa, ptd->sas) { + res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen); + if (res) + return res; + } /* *INDENT-ON* */ /* req is not retransmit */ return 0; } -static int +static u32 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike) { + if (ike_hdr_is_response (ike)) + return 0; + u32 msg_id = clib_net_to_host_u32 (ike->msgid); /* new req */ - if (msg_id > sa->last_msg_id) + if (msg_id > sa->last_msg_id || sa->last_msg_id == ~0) { sa->last_msg_id = msg_id; return 0; } + /* retransmitted req */ - else if (msg_id == sa->last_msg_id) + if (msg_id == sa->last_msg_id) { - ike_header_t *tmp; - tmp = (ike_header_t *) sa->last_res_packet_data; + sa->stats.n_retransmit++; + ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data; + u32 slen = clib_net_to_host_u32 (tmp->length); ike->ispi = tmp->ispi; ike->rspi = tmp->rspi; ike->nextpayload = tmp->nextpayload; @@ -2289,186 +2753,295 @@ ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike) ike->flags = tmp->flags; ike->msgid = tmp->msgid; ike->length = tmp->length; - clib_memcpy_fast (ike->payload, tmp->payload, - clib_net_to_host_u32 (tmp->length) - sizeof (*ike)); + clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike)); ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d", - msg_id, sa->raddr.as_u32, sa->iaddr.as_u32); - return 1; + msg_id, ip_addr_v4 (&sa->raddr).as_u32, + ip_addr_v4 (&sa->iaddr).as_u32); + return slen; } + /* old req ignore */ - else - { - ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d", - msg_id, sa->raddr.as_u32, sa->iaddr.as_u32); - } - return -1; + ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d", + msg_id, ip_addr_v4 (&sa->raddr).as_u32, + ip_addr_v4 (&sa->iaddr).as_u32); + return ~0; } static void -ikev2_init_sa (ikev2_sa_t * sa) +ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa) { ikev2_main_t *km = &ikev2_main; - sa->liveness_period_check = - vlib_time_now (km->vlib_main) + km->liveness_period; + sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period; + sa->profile_index = ~0; } -static uword -ikev2_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) +static void +ikev2_del_sa_init_from_main (u64 * ispi) { - u32 n_left_from, *from, *to_next; - ikev2_next_t next_index; ikev2_main_t *km = &ikev2_main; - u32 thread_index = vlib_get_thread_index (); - - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; - next_index = node->cached_next_index; - - while (n_left_from > 0) + uword *p = hash_get (km->sa_by_ispi, *ispi); + if (p) { - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + 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); + } +} - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - u32 next0 = IKEV2_NEXT_ERROR_DROP; - u32 sw_if_index0; - ip4_header_t *ip40; - udp_header_t *udp0; - ike_header_t *ike0; - ikev2_sa_t *sa0 = 0; - ikev2_sa_t sa; /* temporary store for SA */ - int len = 0; - int r; - - /* speculatively enqueue b0 to the current next frame */ - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - 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); +static void +ikev2_del_sa_init (u64 ispi) +{ + vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi, + sizeof (ispi)); +} - if (ike0->version != IKE_VERSION_2) - { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_NOT_IKEV2, 1); - goto dispatch0; - } +static_always_inline void +ikev2_rewrite_v6_addrs (ikev2_sa_t * sa, ip6_header_t * ih) +{ + if (sa->is_initiator) + { + ip_address_copy_addr (&ih->dst_address, &sa->raddr); + ip_address_copy_addr (&ih->src_address, &sa->iaddr); + } + else + { + ip_address_copy_addr (&ih->dst_address, &sa->iaddr); + ip_address_copy_addr (&ih->src_address, &sa->raddr); + } +} - if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT) - { - sa0 = &sa; - clib_memset (sa0, 0, sizeof (*sa0)); +static_always_inline void +ikev2_rewrite_v4_addrs (ikev2_sa_t * sa, ip4_header_t * ih) +{ + if (sa->is_initiator) + { + ip_address_copy_addr (&ih->dst_address, &sa->raddr); + ip_address_copy_addr (&ih->src_address, &sa->iaddr); + } + else + { + ip_address_copy_addr (&ih->dst_address, &sa->iaddr); + ip_address_copy_addr (&ih->src_address, &sa->raddr); + } +} - if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR) - { - if (ike0->rspi == 0) - { - sa0->raddr.as_u32 = ip40->dst_address.as_u32; - sa0->iaddr.as_u32 = ip40->src_address.as_u32; +static_always_inline void +ikev2_set_ip_address (ikev2_sa_t *sa, const void *iaddr, const void *raddr, + const ip_address_family_t af) +{ + ip_address_set (&sa->raddr, raddr, af); + ip_address_set (&sa->iaddr, iaddr, af); +} - r = ikev2_retransmit_sa_init (ike0, sa0->iaddr, - sa0->raddr); - if (r == 1) - { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT, - 1); - len = clib_net_to_host_u32 (ike0->length); - goto dispatch0; - } - else if (r == -1) - { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_SA_INIT_IGNORE, - 1); - goto dispatch0; - } +static void +ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4, + ip6_header_t * ip6, u8 is_ip4) +{ + u32 src, dst; + if (is_ip4) + { + src = ip4->src_address.as_u32; + dst = ip4->dst_address.as_u32; + } + else + { + src = ip6->src_address.as_u32[3]; + dst = ip6->dst_address.as_u32[3]; + } + ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d " + "received from %d.%d.%d.%d to %d.%d.%d.%d", + exchange, src, dst); +} - ikev2_process_sa_init_req (vm, sa0, ike0); +static void +ikev2_generate_sa_init_data_and_log (ikev2_sa_t * sa) +{ + ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (sa); - if (sa0->state == IKEV2_STATE_SA_INIT) - { - ikev2_sa_free_proposal_vector (&sa0->r_proposals); - sa0->r_proposals = - ikev2_select_proposal (sa0->i_proposals, - IKEV2_PROTOCOL_IKE); - ikev2_generate_sa_init_data (sa0); - } + if (PREDICT_TRUE (rc == IKEV2_GENERATE_SA_INIT_OK)) + return; - if (sa0->state == IKEV2_STATE_SA_INIT - || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE) - { - len = ikev2_generate_message (sa0, ike0, 0); - } + if (rc == IKEV2_GENERATE_SA_INIT_ERR_NO_DH) + ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR); + else if (rc == IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH) + ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR); +} - if (sa0->state == IKEV2_STATE_SA_INIT) - { - /* add SA to the pool */ - pool_get (km->per_thread_data[thread_index].sas, - sa0); - clib_memcpy_fast (sa0, &sa, sizeof (*sa0)); - ikev2_init_sa (sa0); - hash_set (km-> - per_thread_data[thread_index].sa_by_rspi, - sa0->rspi, - sa0 - - km->per_thread_data[thread_index].sas); - } - else - { - ikev2_sa_free_all_vec (sa0); - } - } - } - else //received sa_init without initiator flag +static void +ikev2_update_stats (vlib_main_t *vm, u32 node_index, ikev2_stats_t *s) +{ + vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_KEEPALIVE, + s->n_keepalives); + vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_REKEY_REQ, + s->n_rekey_req); + vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_INIT_SA_REQ, + s->n_sa_init_req); + vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_IKE_AUTH_REQ, + s->n_sa_auth_req); +} + +static_always_inline uword +ikev2_node_internal (vlib_main_t *vm, vlib_node_runtime_t *node, + vlib_frame_t *frame, u8 is_ip4, u8 natt) +{ + u32 n_left = frame->n_vectors, *from; + ikev2_main_t *km = &ikev2_main; + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; + u16 nexts[VLIB_FRAME_SIZE], *next = nexts; + ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data (); + ikev2_stats_t _stats, *stats = &_stats; + int res; + + /* no NAT traversal for ip6 */ + ASSERT (!natt || is_ip4); + + clib_memset_u16 (stats, 0, sizeof (stats[0]) / sizeof (u16)); + from = vlib_frame_vector_args (frame); + vlib_get_buffers (vm, from, bufs, n_left); + b = bufs; + + while (n_left > 0) + { + vlib_buffer_t *b0 = b[0]; + next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP + : IKEV2_NEXT_IP6_ERROR_DROP; + ip4_header_t *ip40 = 0; + ip6_header_t *ip60 = 0; + udp_header_t *udp0; + ike_header_t *ike0; + ikev2_sa_t *sa0 = 0; + ikev2_sa_t sa; /* temporary store for SA */ + u32 rlen, slen = 0; + int ip_hdr_sz = 0; + int is_req = 0; + + if (natt) + { + 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; + ip_hdr_sz = sizeof (*ip40); + } + else + { + u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset; + ike0 = vlib_buffer_get_current (b0); + vlib_buffer_advance (b0, -sizeof (*udp0)); + udp0 = vlib_buffer_get_current (b0); + + if (is_ip4) + { + ip40 = (ip4_header_t *) ipx_hdr; + ip_hdr_sz = sizeof (*ip40); + } + else + { + ip60 = (ip6_header_t *) ipx_hdr; + ip_hdr_sz = sizeof (*ip60); + } + vlib_buffer_advance (b0, -ip_hdr_sz); + } + + rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0); + + /* check for non-esp marker */ + if (natt) + { + ASSERT (*((u32 *) ike0) == 0); + ike0 = + (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker)); + rlen -= sizeof (ikev2_non_esp_marker); + } + + if (clib_net_to_host_u32 (ike0->length) != rlen) + { + vlib_node_increment_counter (vm, node->node_index, + IKEV2_ERROR_BAD_LENGTH, 1); + goto dispatch0; + } + + if (ike0->version != IKE_VERSION_2) + { + vlib_node_increment_counter (vm, node->node_index, + IKEV2_ERROR_NOT_IKEV2, 1); + goto dispatch0; + } + + if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT) + { + sa0 = &sa; + clib_memset (sa0, 0, sizeof (*sa0)); + + if (ike_hdr_is_initiator (ike0)) + { + sa0->stats.n_sa_init_req++; + stats->n_sa_init_req++; + if (ike0->rspi == 0) { - ikev2_process_sa_init_resp (vm, sa0, ike0); + if (is_ip4) + ikev2_set_ip_address (sa0, &ip40->src_address, + &ip40->dst_address, AF_IP4); + else + ikev2_set_ip_address (sa0, &ip60->src_address, + &ip60->dst_address, AF_IP6); + + sa0->dst_port = clib_net_to_host_u16 (udp0->src_port); + + slen = + ikev2_retransmit_sa_init (ike0, sa0->iaddr, + sa0->raddr, rlen); + if (slen) + { + vlib_node_increment_counter (vm, node->node_index, + ~0 == + slen ? + IKEV2_ERROR_IKE_SA_INIT_IGNORE + : + IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT, + 1); + goto dispatch0; + } + + res = ikev2_process_sa_init_req ( + vm, sa0, ike0, udp0, rlen, + vnet_buffer (b0)->sw_if_index[VLIB_RX]); + if (!res) + vlib_node_increment_counter (vm, node->node_index, + IKEV2_ERROR_MALFORMED_PACKET, + 1); if (sa0->state == IKEV2_STATE_SA_INIT) { - ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH; - uword *p = hash_get (km->sa_by_ispi, ike0->ispi); - if (p) - { - ikev2_sa_t *sai = - pool_elt_at_index (km->sais, p[0]); - - if (sai->init_response_received) - { - /* we've already processed sa-init response */ - sa0->state = IKEV2_STATE_UNKNOWN; - } - else - { - ikev2_complete_sa_data (sa0, sai); - ikev2_calc_keys (sa0); - ikev2_sa_auth_init (sa0); - len = ikev2_generate_message (sa0, ike0, 0); - } - } + ikev2_sa_free_proposal_vector (&sa0->r_proposals); + sa0->r_proposals = + ikev2_select_proposal (sa0->i_proposals, + IKEV2_PROTOCOL_IKE); + ikev2_generate_sa_init_data_and_log (sa0); + } + + if (sa0->state == IKEV2_STATE_SA_INIT + || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE) + { + ike0->flags = IKEV2_HDR_FLAG_RESPONSE; + slen = + ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats); + if (~0 == slen) + vlib_node_increment_counter (vm, node->node_index, + IKEV2_ERROR_NO_BUFF_SPACE, + 1); } if (sa0->state == IKEV2_STATE_SA_INIT) { /* add SA to the pool */ - pool_get (km->per_thread_data[thread_index].sas, sa0); + pool_get (ptd->sas, sa0); clib_memcpy_fast (sa0, &sa, sizeof (*sa0)); - hash_set (km->per_thread_data[thread_index].sa_by_rspi, - sa0->rspi, - sa0 - km->per_thread_data[thread_index].sas); + ikev2_init_sa (vm, sa0); + hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas); } else { @@ -2476,271 +3049,435 @@ ikev2_node_fn (vlib_main_t * vm, } } } - else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH) + else //received sa_init without initiator flag { - uword *p; - p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, - clib_net_to_host_u64 (ike0->rspi)); - if (p) - { - sa0 = - pool_elt_at_index (km->per_thread_data[thread_index].sas, - p[0]); + if (is_ip4) + ikev2_set_ip_address (sa0, &ip40->dst_address, + &ip40->src_address, AF_IP4); + else + ikev2_set_ip_address (sa0, &ip60->dst_address, + &ip60->src_address, AF_IP6); - r = ikev2_retransmit_resp (sa0, ike0); - if (r == 1) - { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_REQ_RETRANSMIT, - 1); - len = clib_net_to_host_u32 (ike0->length); - goto dispatch0; - } - else if (r == -1) - { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_REQ_IGNORE, - 1); - goto dispatch0; - } + ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen); - ikev2_process_auth_req (vm, sa0, ike0); - ikev2_sa_auth (sa0); - if (sa0->state == IKEV2_STATE_AUTHENTICATED) + if (sa0->state == IKEV2_STATE_SA_INIT) + { + is_req = 1; + ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH; + uword *p = hash_get (km->sa_by_ispi, sa0->ispi); + if (p) { - 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, - &sa0->childs[0], - p[0], 0, 0); - } + ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]); - if (sa0->is_initiator) - { - uword *p = hash_get (km->sa_by_ispi, ike0->ispi); - if (p) + if (clib_atomic_bool_cmp_and_swap + (&sai->init_response_received, 0, 1)) { - 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_complete_sa_data (sa0, sai); + ikev2_calc_keys (sa0); + ikev2_sa_auth_init (sa0); + ike0->flags = IKEV2_HDR_FLAG_INITIATOR; + ike0->msgid = + clib_net_to_host_u32 (sai->last_init_msg_id); + sa0->last_init_msg_id = sai->last_init_msg_id + 1; + slen = ikev2_generate_message (b0, sa0, ike0, 0, + udp0, stats); + if (~0 == slen) + vlib_node_increment_counter (vm, + node->node_index, + IKEV2_ERROR_NO_BUFF_SPACE, + 1); + } + else + { + /* we've already processed sa-init response */ + sa0->state = IKEV2_STATE_UNKNOWN; } } - else - { - len = ikev2_generate_message (sa0, ike0, 0); - } + } + + if (sa0->state == IKEV2_STATE_SA_INIT) + { + /* add SA to the pool */ + pool_get (ptd->sas, sa0); + clib_memcpy_fast (sa0, &sa, sizeof (*sa0)); + hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas); + } + else + { + ikev2_sa_free_all_vec (sa0); } } - else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL) + } + else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH) + { + uword *p; + p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi)); + if (p) { - uword *p; - p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, - clib_net_to_host_u64 (ike0->rspi)); - if (p) + sa0 = pool_elt_at_index (ptd->sas, p[0]); + slen = ikev2_retransmit_resp (sa0, ike0); + if (slen) { - sa0 = - pool_elt_at_index (km->per_thread_data[thread_index].sas, - p[0]); + vlib_node_increment_counter (vm, node->node_index, + ~0 == + slen ? + IKEV2_ERROR_IKE_REQ_IGNORE + : + IKEV2_ERROR_IKE_REQ_RETRANSMIT, + 1); + goto dispatch0; + } - r = ikev2_retransmit_resp (sa0, ike0); - if (r == 1) - { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_REQ_RETRANSMIT, - 1); - len = clib_net_to_host_u32 (ike0->length); - goto dispatch0; - } - else if (r == -1) - { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_REQ_IGNORE, - 1); - goto dispatch0; - } + sa0->dst_port = clib_net_to_host_u16 (udp0->src_port); + res = ikev2_process_auth_req (vm, sa0, ike0, rlen); + if (res) + ikev2_sa_auth (sa0); + else + vlib_node_increment_counter (vm, node->node_index, + IKEV2_ERROR_MALFORMED_PACKET, 1); + if (sa0->state == IKEV2_STATE_AUTHENTICATED) + { + ikev2_initial_contact_cleanup (ptd, sa0); + ikev2_sa_match_ts (sa0); + if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE) + ikev2_create_tunnel_interface (vm, sa0, + &sa0->childs[0], + p[0], 0, 0); + } + + if (sa0->is_initiator) + { + sa0->last_msg_id = ~0; + ikev2_del_sa_init (sa0->ispi); + } + else + { + sa0->stats.n_sa_auth_req++; + stats->n_sa_auth_req++; + ike0->flags = IKEV2_HDR_FLAG_RESPONSE; + slen = + ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats); + if (~0 == slen) + vlib_node_increment_counter (vm, node->node_index, + IKEV2_ERROR_NO_BUFF_SPACE, + 1); + } + } + } + else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL) + { + uword *p; + p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi)); + if (p) + { + sa0 = pool_elt_at_index (ptd->sas, p[0]); + slen = ikev2_retransmit_resp (sa0, ike0); + if (slen) + { + vlib_node_increment_counter (vm, node->node_index, + ~0 == + slen ? + IKEV2_ERROR_IKE_REQ_IGNORE + : + IKEV2_ERROR_IKE_REQ_RETRANSMIT, + 1); + goto dispatch0; + } - ikev2_process_informational_req (vm, sa0, ike0); - if (sa0->del) + res = ikev2_process_informational_req (vm, sa0, ike0, rlen); + if (!res) + { + vlib_node_increment_counter (vm, node->node_index, + IKEV2_ERROR_MALFORMED_PACKET, + 1); + slen = ~0; + goto dispatch0; + } + + if (sa0->del) + { + if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE) { - if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE) - { - ikev2_delete_t *d, *tmp, *resp = 0; - vec_foreach (d, sa0->del) + ikev2_delete_t *d, *tmp, *resp = 0; + vec_foreach (d, sa0->del) + { + ikev2_child_sa_t *ch_sa; + ch_sa = ikev2_sa_get_child (sa0, d->spi, + d->protocol_id, + !sa0->is_initiator); + if (ch_sa) { - ikev2_child_sa_t *ch_sa; - ch_sa = ikev2_sa_get_child (sa0, d->spi, - d->protocol_id, - !sa0->is_initiator); - if (ch_sa) + ikev2_delete_tunnel_interface (km->vnet_main, + sa0, ch_sa); + if (!sa0->is_initiator) { - ikev2_delete_tunnel_interface (km->vnet_main, - sa0, ch_sa); - if (!sa0->is_initiator) - { - vec_add2 (resp, tmp, 1); - tmp->protocol_id = d->protocol_id; - tmp->spi = ch_sa->r_proposals[0].spi; - } - ikev2_sa_del_child_sa (sa0, ch_sa); + vec_add2 (resp, tmp, 1); + tmp->protocol_id = d->protocol_id; + tmp->spi = ch_sa->r_proposals[0].spi; } + ikev2_sa_del_child_sa (sa0, ch_sa); } - if (!sa0->is_initiator) - { - vec_free (sa0->del); - sa0->del = resp; - } + } + if (!sa0->is_initiator) + { + vec_free (sa0->del); + sa0->del = resp; } } - if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE)) - { - ike0->flags |= IKEV2_HDR_FLAG_RESPONSE; - len = ikev2_generate_message (sa0, ike0, 0); - } + } + if (ike_hdr_is_request (ike0)) + { + ike0->flags = IKEV2_HDR_FLAG_RESPONSE; + slen = + ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats); + if (~0 == slen) + vlib_node_increment_counter (vm, node->node_index, + IKEV2_ERROR_NO_BUFF_SPACE, + 1); } } - else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA) + } + else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA) + { + uword *p; + p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi)); + if (p) { - uword *p; - p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, - clib_net_to_host_u64 (ike0->rspi)); - if (p) + sa0 = pool_elt_at_index (ptd->sas, p[0]); + slen = ikev2_retransmit_resp (sa0, ike0); + if (slen) { - sa0 = - pool_elt_at_index (km->per_thread_data[thread_index].sas, - p[0]); + vlib_node_increment_counter (vm, node->node_index, + ~0 == + slen ? + IKEV2_ERROR_IKE_REQ_IGNORE + : + IKEV2_ERROR_IKE_REQ_RETRANSMIT, + 1); + goto dispatch0; + } - r = ikev2_retransmit_resp (sa0, ike0); - if (r == 1) + res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen); + if (!res) + { + vlib_node_increment_counter (vm, node->node_index, + IKEV2_ERROR_MALFORMED_PACKET, + 1); + slen = ~0; + goto dispatch0; + } + + if (sa0->rekey) + { + if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE) { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_REQ_RETRANSMIT, - 1); - len = clib_net_to_host_u32 (ike0->length); - goto dispatch0; + if (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 (vm, sa0, child, p[0], + child - sa0->childs, 1); } - else if (r == -1) + if (ike_hdr_is_response (ike0)) { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_REQ_IGNORE, - 1); - goto dispatch0; + vec_free (sa0->rekey); } - - ikev2_process_create_child_sa_req (vm, sa0, ike0); - if (sa0->rekey) + else { - if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE) - { - if (sa0->childs) - vec_free (sa0->childs); - ikev2_child_sa_t *child; - vec_add2 (sa0->childs, child, 1); - 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], - child - sa0->childs, - 1); - } - if (sa0->is_initiator) - { - vec_del1 (sa0->rekey, 0); - } - else - { - len = ikev2_generate_message (sa0, ike0, 0); - } + stats->n_rekey_req++; + sa0->stats.n_rekey_req++; + ike0->flags = IKEV2_HDR_FLAG_RESPONSE; + slen = + ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats); + if (~0 == slen) + vlib_node_increment_counter (vm, node->node_index, + IKEV2_ERROR_NO_BUFF_SPACE, + 1); + } + } + else if (sa0->new_child) + { + ikev2_child_sa_t *c; + vec_add2 (sa0->childs, c, 1); + memset (c, 0, sizeof (*c)); + c->r_proposals = sa0->new_child[0].r_proposal; + c->i_proposals = sa0->new_child[0].i_proposal; + c->tsi = sa0->new_child[0].tsi; + c->tsr = sa0->new_child[0].tsr; + ikev2_create_tunnel_interface (vm, sa0, c, p[0], + c - sa0->childs, 0); + if (ike_hdr_is_request (ike0)) + { + ike0->flags = IKEV2_HDR_FLAG_RESPONSE; + slen = + ikev2_generate_message (b0, sa0, ike0, 0, udp0, 0); + if (~0 == slen) + vlib_node_increment_counter ( + vm, node->node_index, IKEV2_ERROR_NO_BUFF_SPACE, 1); } } } + } + else + { + ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4); + } + + dispatch0: + /* if we are sending packet back, rewrite headers */ + if (slen && ~0 != slen) + { + if (is_ip4) + { + next[0] = IKEV2_NEXT_IP4_LOOKUP; + ikev2_rewrite_v4_addrs (sa0, ip40); + } else { - ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d " - "received from %d.%d.%d.%d to %d.%d.%d.%d", - ike0->exchange, - ip40->src_address.as_u32, - ip40->dst_address.as_u32); + next[0] = IKEV2_NEXT_IP6_LOOKUP; + ikev2_rewrite_v6_addrs (sa0, ip60); } - dispatch0: - /* if we are sending packet back, rewrite headers */ - if (len) + if (is_req) { - next0 = IKEV2_NEXT_IP4_LOOKUP; - if (sa0->is_initiator) - { - ip40->dst_address.as_u32 = sa0->raddr.as_u32; - ip40->src_address.as_u32 = sa0->iaddr.as_u32; - } - else + 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) + && ikev2_natt_active (sa0)) { - ip40->dst_address.as_u32 = sa0->iaddr.as_u32; - ip40->src_address.as_u32 = sa0->raddr.as_u32; + if (!natt) + slen = ikev2_insert_non_esp_marker (ike0, slen); } - 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); } - /* delete sa */ - if (sa0 && (sa0->state == IKEV2_STATE_DELETED || - sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)) + else { - ikev2_child_sa_t *c; + if (natt) + slen += sizeof (ikev2_non_esp_marker); - vec_foreach (c, sa0->childs) - ikev2_delete_tunnel_interface (km->vnet_main, sa0, c); - - ikev2_delete_sa (sa0); + u16 tp = udp0->dst_port; + udp0->dst_port = udp0->src_port; + udp0->src_port = tp; } - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) + udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t)); + udp0->checksum = 0; + b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t); + if (is_ip4) + { + ip40->length = clib_host_to_net_u16 (b0->current_length); + ip40->checksum = ip4_header_checksum (ip40); + } + else { - ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; + ip60->payload_length = + clib_host_to_net_u16 (b0->current_length - sizeof (*ip60)); } + } + /* delete sa */ + if (sa0 && (sa0->state == IKEV2_STATE_DELETED || + sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)) + { + ikev2_child_sa_t *c; + + vec_foreach (c, sa0->childs) + ikev2_delete_tunnel_interface (km->vnet_main, sa0, c); - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, - n_left_to_next, bi0, next0); + ikev2_delete_sa (ptd, sa0); } + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + t->next_index = next[0]; + } + n_left -= 1; + next += 1; + b += 1; } - vlib_node_increment_counter (vm, ikev2_node.index, + ikev2_update_stats (vm, node->node_index, stats); + vlib_node_increment_counter (vm, node->node_index, IKEV2_ERROR_PROCESSED, frame->n_vectors); + vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); return frame->n_vectors; } +static uword +ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 0); +} + +static uword +ikev2_ip4_natt (vlib_main_t *vm, vlib_node_runtime_t *node, + vlib_frame_t *frame) +{ + return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 1 /* natt */); +} + +static uword +ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */, 0); +} + /* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ikev2_node,static) = { - .function = ikev2_node_fn, - .name = "ikev2", +VLIB_REGISTER_NODE (ikev2_node_ip4,static) = { + .function = ikev2_ip4, + .name = "ikev2-ip4", .vector_size = sizeof (u32), .format_trace = format_ikev2_trace, .type = VLIB_NODE_TYPE_INTERNAL, - .n_errors = ARRAY_LEN(ikev2_error_strings), - .error_strings = ikev2_error_strings, + .n_errors = IKEV2_N_ERROR, + .error_counters = ikev2_error_counters, + + .n_next_nodes = IKEV2_IP4_N_NEXT, + .next_nodes = { + [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup", + [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop", + }, +}; + +VLIB_REGISTER_NODE (ikev2_node_ip4_natt,static) = { + .function = ikev2_ip4_natt, + .name = "ikev2-ip4-natt", + .vector_size = sizeof (u32), + .format_trace = format_ikev2_trace, + .type = VLIB_NODE_TYPE_INTERNAL, - .n_next_nodes = IKEV2_N_NEXT, + .n_errors = IKEV2_N_ERROR, + .error_counters = ikev2_error_counters, + .n_next_nodes = IKEV2_IP4_N_NEXT, .next_nodes = { [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup", - [IKEV2_NEXT_ERROR_DROP] = "error-drop", + [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop", + }, +}; + +VLIB_REGISTER_NODE (ikev2_node_ip6,static) = { + .function = ikev2_ip6, + .name = "ikev2-ip6", + .vector_size = sizeof (u32), + .format_trace = format_ikev2_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = IKEV2_N_ERROR, + .error_counters = ikev2_error_counters, + + .n_next_nodes = IKEV2_IP6_N_NEXT, + .next_nodes = { + [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup", + [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop", }, }; /* *INDENT-ON* */ @@ -2783,7 +3520,7 @@ ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa, return r; } - if (is_ike || IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 != ts->crypto_alg) + if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg) { /* Integrity */ error = 1; @@ -2828,7 +3565,7 @@ ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa, } /* DH */ - if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE) + if (is_ike) { error = 1; vec_foreach (td, km->supported_transforms) @@ -2860,7 +3597,6 @@ ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa, { vec_add1 (proposal->transforms, *td); error = 0; - break; } } if (error) @@ -2889,10 +3625,11 @@ 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) +ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst, + u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index) { ip4_header_t *ip40; + ip6_header_t *ip60; udp_header_t *udp0; vlib_buffer_t *b0; vlib_frame_t *f; @@ -2901,47 +3638,72 @@ ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst, b0 = vlib_get_buffer (vm, bi0); vlib_buffer_advance (b0, -sizeof (udp_header_t)); udp0 = vlib_buffer_get_current (b0); - vlib_buffer_advance (b0, -sizeof (ip4_header_t)); - ip40 = vlib_buffer_get_current (b0); - - - ip40->ip_version_and_header_length = 0x45; - ip40->tos = 0; - ip40->fragment_id = 0; - ip40->flags_and_fragment_offset = 0; - ip40->ttl = 0xff; - 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); + if (ip_addr_version (dst) == AF_IP4) + { + vlib_buffer_advance (b0, -sizeof (ip4_header_t)); + ip40 = vlib_buffer_get_current (b0); + ip40->ip_version_and_header_length = 0x45; + ip40->tos = 0; + ip40->fragment_id = 0; + ip40->flags_and_fragment_offset = 0; + ip40->ttl = 0xff; + ip40->protocol = IP_PROTOCOL_UDP; + ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32; + ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32; + 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); + } + else + { + vlib_buffer_advance (b0, -sizeof (ip6_header_t)); + ip60 = vlib_buffer_get_current (b0); + + b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t); + ip60->ip_version_traffic_class_and_flow_label = + clib_host_to_net_u32 (0x6 << 28); + ip60->payload_length = + clib_host_to_net_u16 (b0->current_length - sizeof (*ip60)); + ip60->protocol = IP_PROTOCOL_UDP; + ip60->hop_limit = 0xff; + clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8, + sizeof (ip60->src_address)); + clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8, + sizeof (ip60->src_address)); + } + + b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; + vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0; + + u32 next_index = (ip_addr_version (dst) == AF_IP4) ? + ip4_lookup_node.index : ip6_lookup_node.index; /* send the request */ - f = vlib_get_frame_to_node (vm, ip4_lookup_node.index); + f = vlib_get_frame_to_node (vm, next_index); to_next = vlib_frame_vector_args (f); to_next[0] = bi0; f->n_vectors = 1; - vlib_put_frame_to_node (vm, ip4_lookup_node.index, f); + vlib_put_frame_to_node (vm, next_index, f); } static u32 -ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike) +ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b) { u32 bi0; if (vlib_buffer_alloc (vm, &bi0, 1) != 1) { - *ike = 0; + *b = 0; return 0; } - vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0); - *ike = vlib_buffer_get_current (b0); + *b = vlib_get_buffer (vm, bi0); return bi0; } @@ -2950,6 +3712,8 @@ ikev2_set_local_key (vlib_main_t * vm, u8 * file) { ikev2_main_t *km = &ikev2_main; + if (km->pkey) + EVP_PKEY_free (km->pkey); km->pkey = ikev2_load_key_file (file); if (km->pkey == NULL) return clib_error_return (0, "load key '%s' failed", file); @@ -2959,54 +3723,159 @@ ikev2_set_local_key (vlib_main_t * vm, u8 * file) static_always_inline vnet_api_error_t ikev2_register_udp_port (ikev2_profile_t * p, u16 port) +{ + ipsec_register_udp_port (port); + p->ipsec_over_udp_port = port; + return 0; +} + +static_always_inline void +ikev2_unregister_udp_port (ikev2_profile_t * p) +{ + if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE) + return; + + ipsec_unregister_udp_port (p->ipsec_over_udp_port); + p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE; +} + +static void +ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm, + ikev2_main_per_thread_data_t * tkm, + ikev2_sa_t * sa, u8 send_notification) { ikev2_main_t *km = &ikev2_main; - udp_dst_port_info_t *pi; + ip_address_t *src, *dst; + vlib_buffer_t *b0; + ikev2_child_sa_t *c; + + /* Create the Initiator notification for IKE SA removal */ + ike_header_t *ike0; + u32 bi0 = 0; + int len; - uword *v = hash_get (km->udp_ports, port); - pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4); + vec_resize (sa->del, 1); + sa->del->protocol_id = IKEV2_PROTOCOL_IKE; + sa->del->spi = sa->ispi; - if (v) + if (send_notification) { - /* IKE already uses this port, only increment reference counter */ - ASSERT (pi); - v[0]++; + bi0 = ikev2_get_new_ike_header_buff (vm, &b0); + if (!bi0) + { + ikev2_log_error ("buffer alloc failure"); + goto delete_sa; + } + + ike0 = vlib_buffer_get_current (b0); + ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL; + ike0->ispi = clib_host_to_net_u64 (sa->ispi); + ike0->rspi = clib_host_to_net_u64 (sa->rspi); + ike0->flags = 0; + ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id); + sa->last_init_msg_id += 1; + len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0); + if (~0 == len) + return; + + if (ikev2_natt_active (sa)) + 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; + } + + ikev2_send_ike (vm, src, dst, bi0, len, + ikev2_get_port (sa), sa->dst_port, 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); +delete_sa: + /* delete local SA */ + vec_foreach (c, sa->childs) + ikev2_delete_tunnel_interface (km->vnet_main, sa, c); + + u64 rspi = sa->rspi; + ikev2_sa_free_all_vec (sa); + uword *p = hash_get (tkm->sa_by_rspi, rspi); + if (p) + { + hash_unset (tkm->sa_by_rspi, rspi); + pool_put (tkm->sas, sa); } - p->dst_port = port; - return 0; } -static_always_inline void -ikev2_unregister_udp_port (ikev2_profile_t * p) +static void +ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p) { - ikev2_main_t *km = &ikev2_main; - uword *v; + ikev2_main_per_thread_data_t *tkm; + ikev2_sa_t *sa; + u32 pi = p - km->profiles; + u32 *sai; + u32 *del_sai = 0; - if (p->dst_port == IPSEC_UDP_PORT_NONE) - return; + /* *INDENT-OFF* */ + pool_foreach (sa, km->sais) { + if (pi == sa->profile_index) + vec_add1 (del_sai, sa - km->sais); + } + /* *INDENT-ON* */ + + vec_foreach (sai, del_sai) + { + sa = pool_elt_at_index (km->sais, sai[0]); + ikev2_sa_free_all_vec (sa); + hash_unset (km->sa_by_ispi, sa->ispi); + pool_put (km->sais, sa); + } + vec_reset_length (del_sai); + + vec_foreach (tkm, km->per_thread_data) + { + /* *INDENT-OFF* */ + pool_foreach (sa, tkm->sas) { + if (sa->profile_index != ~0 && pi == sa->profile_index) + vec_add1 (del_sai, sa - tkm->sas); + } + /* *INDENT-ON* */ + + vec_foreach (sai, del_sai) + { + sa = pool_elt_at_index (tkm->sas, sai[0]); + ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1); + } + + vec_reset_length (del_sai); + } + + vec_free (del_sai); +} + +static void +ikev2_profile_responder_free (ikev2_responder_t *r) +{ + vec_free (r->hostname); +} - v = hash_get (km->udp_ports, p->dst_port); - if (!v) - return; +static void +ikev2_profile_free (ikev2_profile_t * p) +{ + vec_free (p->name); - v[0]--; + vec_free (p->auth.data); + if (p->auth.key) + EVP_PKEY_free (p->auth.key); - if (v[0] == 0) - { - udp_unregister_dst_port (km->vlib_main, p->dst_port, 1); - hash_unset (km->udp_ports, p->dst_port); - } + ikev2_profile_responder_free (&p->responder); - p->dst_port = IPSEC_UDP_PORT_NONE; + vec_free (p->loc_id.data); + vec_free (p->rem_id.data); } clib_error_t * @@ -3023,7 +3892,7 @@ 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->dst_port = IPSEC_UDP_PORT_NONE; + p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE; p->responder.sw_if_index = ~0; p->tun_itf = ~0; uword index = p - km->profiles; @@ -3036,8 +3905,9 @@ ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add) return clib_error_return (0, "policy %v does not exists", name); ikev2_unregister_udp_port (p); + ikev2_cleanup_profile_sessions (km, p); - vec_free (p->name); + ikev2_profile_free (p); pool_put (km->profiles, p); mhash_unset (&km->profile_index_by_name, name, 0); } @@ -3058,7 +3928,11 @@ ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method, r = clib_error_return (0, "unknown profile %v", name); return r; } + + if (p->auth.key) + EVP_PKEY_free (p->auth.key); vec_free (p->auth.data); + p->auth.method = auth_method; p->auth.data = vec_dup (auth_data); p->auth.hex = data_hex_format; @@ -3066,16 +3940,23 @@ ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method, if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG) { vec_add1 (p->auth.data, 0); - if (p->auth.key) - EVP_PKEY_free (p->auth.key); - p->auth.key = ikev2_load_cert_file (auth_data); + p->auth.key = ikev2_load_cert_file (p->auth.data); if (p->auth.key == NULL) - return clib_error_return (0, "load cert '%s' failed", auth_data); + return clib_error_return (0, "load cert '%s' failed", p->auth.data); } return 0; } +static int +ikev2_is_id_supported (u8 id_type) +{ + return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR || + id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR || + id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR || + id_type == IKEV2_ID_TYPE_ID_FQDN); +} + clib_error_t * ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data, int is_local) @@ -3083,8 +3964,7 @@ ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data, ikev2_profile_t *p; clib_error_t *r; - if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR - && id_type < IKEV2_ID_TYPE_ID_KEY_ID) + if (!ikev2_is_id_supported (id_type)) { r = clib_error_return (0, "unsupported identity type %U", format_ikev2_id_type, id_type); @@ -3115,10 +3995,27 @@ ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data, return 0; } +static_always_inline void +ikev2_set_ts_type (ikev2_ts_t * ts, const ip_address_t * addr) +{ + if (ip_addr_version (addr) == AF_IP4) + ts->ts_type = TS_IPV4_ADDR_RANGE; + else + ts->ts_type = TS_IPV6_ADDR_RANGE; +} + +static_always_inline void +ikev2_set_ts_addrs (ikev2_ts_t * ts, const ip_address_t * start, + const ip_address_t * end) +{ + ip_address_copy (&ts->start_addr, start); + ip_address_copy (&ts->end_addr, end); +} + clib_error_t * ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id, - u16 start_port, u16 end_port, ip4_address_t start_addr, - ip4_address_t end_addr, int is_local) + u16 start_port, u16 end_port, ip_address_t start_addr, + ip_address_t end_addr, int is_local) { ikev2_profile_t *p; clib_error_t *r; @@ -3131,32 +4028,54 @@ ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id, return r; } + if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr)) + return clib_error_return (0, "IP address version mismatch!"); + if (is_local) { - p->loc_ts.start_addr.as_u32 = start_addr.as_u32; - p->loc_ts.end_addr.as_u32 = end_addr.as_u32; + ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr); p->loc_ts.start_port = start_port; p->loc_ts.end_port = end_port; p->loc_ts.protocol_id = protocol_id; - p->loc_ts.ts_type = 7; + ikev2_set_ts_type (&p->loc_ts, &start_addr); } else { - p->rem_ts.start_addr.as_u32 = start_addr.as_u32; - p->rem_ts.end_addr.as_u32 = end_addr.as_u32; + ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr); p->rem_ts.start_port = start_port; p->rem_ts.end_port = end_port; p->rem_ts.protocol_id = protocol_id; - p->rem_ts.ts_type = 7; + ikev2_set_ts_type (&p->rem_ts, &start_addr); } return 0; } +clib_error_t * +ikev2_set_profile_responder_hostname (vlib_main_t *vm, u8 *name, u8 *hostname, + u32 sw_if_index) +{ + ikev2_profile_t *p; + clib_error_t *r; + + p = ikev2_profile_index_by_name (name); + + if (!p) + { + r = clib_error_return (0, "unknown profile %v", name); + return r; + } + + p->responder.is_resolved = 0; + p->responder.sw_if_index = sw_if_index; + p->responder.hostname = vec_dup (hostname); + + return 0; +} clib_error_t * ikev2_set_profile_responder (vlib_main_t * vm, u8 * name, - u32 sw_if_index, ip4_address_t ip4) + u32 sw_if_index, ip_address_t addr) { ikev2_profile_t *p; clib_error_t *r; @@ -3169,8 +4088,9 @@ ikev2_set_profile_responder (vlib_main_t * vm, u8 * name, return r; } + p->responder.is_resolved = 1; p->responder.sw_if_index = sw_if_index; - p->responder.ip4 = ip4; + ip_address_copy (&p->responder.addr, &addr); return 0; } @@ -3204,7 +4124,6 @@ clib_error_t * ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name, ikev2_transform_encr_type_t crypto_alg, ikev2_transform_integ_type_t integ_alg, - ikev2_transform_dh_type_t dh_type, u32 crypto_key_size) { ikev2_profile_t *p; @@ -3220,7 +4139,6 @@ ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name, p->esp_ts.crypto_alg = crypto_alg; p->esp_ts.integ_alg = integ_alg; - p->esp_ts.dh_type = dh_type; p->esp_ts.crypto_key_size = crypto_key_size; return 0; } @@ -3250,27 +4168,21 @@ 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->dst_port != IPSEC_UDP_PORT_NONE) + 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->dst_port == IPSEC_UDP_PORT_NONE) + if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE) return VNET_API_ERROR_INVALID_VALUE; ikev2_unregister_udp_port (p); @@ -3317,13 +4229,70 @@ ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name, return 0; } +static int +ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af, + ip_address_t * out_addr) +{ + ip4_address_t *if_ip4; + ip6_address_t *if_ip6; + + if (af == AF_IP4) + { + if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0); + if (if_ip4) + { + ip_address_set (out_addr, if_ip4, AF_IP4); + return 1; + } + } + else + { + if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index); + if (if_ip6) + { + ip_address_set (out_addr, if_ip6, AF_IP6); + return 1; + } + } + return 0; +} + +static clib_error_t * +ikev2_resolve_responder_hostname (vlib_main_t *vm, ikev2_responder_t *r) +{ + ikev2_main_t *km = &ikev2_main; + dns_cache_entry_t *ep = 0; + dns_pending_request_t _t0, *t0 = &_t0; + dns_resolve_name_t _rn, *rn = &_rn; + int rv; + + if (!km->dns_resolve_name) + return clib_error_return (0, "cannot load symbols from dns plugin"); + + t0->request_type = DNS_API_PENDING_NAME_TO_IP; + rv = km->dns_resolve_name (r->hostname, &ep, t0, rn); + if (rv < 0) + return clib_error_return (0, "dns lookup failure"); + + if (ep == 0) + return 0; + + ip_address_copy (&r->addr, &rn->address); + r->is_resolved = 1; + return 0; +} + clib_error_t * ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) { ikev2_profile_t *p; clib_error_t *r; - ip4_main_t *im = &ip4_main; ikev2_main_t *km = &ikev2_main; + vlib_buffer_t *b0; + ike_header_t *ike0; + u32 bi0 = 0; + int len = sizeof (ike_header_t), valid_ip = 0; + ip_address_t src_if_ip = ip_address_initializer; p = ikev2_profile_index_by_name (name); @@ -3333,148 +4302,167 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) return r; } - if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0) + if (p->responder.sw_if_index == ~0 || + (ip_address_is_zero (&p->responder.addr) && + vec_len (p->responder.hostname) == 0)) { r = clib_error_return (0, "responder not set for profile %v", name); return r; } + if (!p->responder.is_resolved) + { + /* try to resolve using dns plugin + * success does not mean we have resolved the name */ + r = ikev2_resolve_responder_hostname (vm, &p->responder); + if (r) + return r; + } - /* Create the Initiator Request */ - { - ike_header_t *ike0; - u32 bi0 = 0; - ip_lookup_main_t *lm = &im->lookup_main; - u32 if_add_index0; - int len = sizeof (ike_header_t); - - /* Get own iface IP */ - if_add_index0 = - lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index]; - ip_interface_address_t *if_add = - pool_elt_at_index (lm->if_address_pool, if_add_index0); - ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add); - - bi0 = ikev2_get_new_ike_header_buff (vm, &ike0); - - /* Prepare the SA and the IKE payload */ - ikev2_sa_t sa; - clib_memset (&sa, 0, sizeof (ikev2_sa_t)); - ikev2_payload_chain_t *chain = 0; - ikev2_payload_new_chain (chain); - - /* Build the IKE proposal payload */ - ikev2_sa_proposal_t *proposals = 0; - ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1); - proposals[0].proposal_num = 1; - proposals[0].protocol_id = IKEV2_PROTOCOL_IKE; - - /* Add and then cleanup proposal data */ - ikev2_payload_add_sa (chain, proposals); - ikev2_sa_free_proposal_vector (&proposals); - - sa.is_initiator = 1; - 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.dst_port = p->dst_port; - sa.is_tun_itf_set = 1; - sa.initial_contact = 1; - 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); - - /* Build the child SA proposal */ - vec_resize (sa.childs, 1); - ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts, - &sa.childs[0].i_proposals, 0); - sa.childs[0].i_proposals[0].proposal_num = 1; - sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP; - 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); - 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); - ikev2_payload_add_notify (chain, - IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP, - nat_detection_sha1); - vec_free (nat_detection_sha1); - - u8 *sig_hash_algo = vec_new (u8, 8); - u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004); - clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig)); - ikev2_payload_add_notify (chain, - IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS, - sig_hash_algo); - vec_free (sig_hash_algo); - - - /* Buffer update and boilerplate */ - len += vec_len (chain->data); - ike0->nextpayload = chain->first_payload_type; - ike0->length = clib_host_to_net_u32 (len); - clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data)); - ikev2_payload_destroy_chain (chain); - - ike0->version = IKE_VERSION_2; - ike0->flags = IKEV2_HDR_FLAG_INITIATOR; - ike0->exchange = IKEV2_EXCHANGE_SA_INIT; - ike0->ispi = sa.ispi; - ike0->rspi = 0; - ike0->msgid = 0; - - /* store whole IKE payload - needed for PSK auth */ - vec_free (sa.last_sa_init_req_packet_data); - vec_add (sa.last_sa_init_req_packet_data, ike0, len); - - /* add data to the SA then add it to the pool */ - sa.iaddr.as_u32 = if_ip->as_u32; - sa.raddr.as_u32 = p->responder.ip4.as_u32; - sa.i_id.type = p->loc_id.type; - sa.i_id.data = vec_dup (p->loc_id.data); - sa.i_auth.method = p->auth.method; - sa.i_auth.hex = p->auth.hex; - sa.i_auth.data = vec_dup (p->auth.data); - vec_add (sa.childs[0].tsi, &p->loc_ts, 1); - vec_add (sa.childs[0].tsr, &p->rem_ts, 1); - - ikev2_initial_contact_cleanup (&sa); - - /* add SA to the pool */ - ikev2_sa_t *sa0 = 0; - pool_get (km->sais, sa0); - 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_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to " - "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0, - p->responder.ip4.as_u32); - } + if (p->responder.is_resolved && + ikev2_get_if_address (p->responder.sw_if_index, + ip_addr_version (&p->responder.addr), &src_if_ip)) + { + valid_ip = 1; + } + + /* Prepare the SA and the IKE payload */ + ikev2_sa_t sa; + clib_memset (&sa, 0, sizeof (ikev2_sa_t)); + ikev2_payload_chain_t *chain = 0; + ikev2_payload_new_chain (chain); + + /* Build the IKE proposal payload */ + ikev2_sa_proposal_t *proposals = 0; + ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1); + proposals[0].proposal_num = 1; + proposals[0].protocol_id = IKEV2_PROTOCOL_IKE; + + /* Add and then cleanup proposal data */ + ikev2_payload_add_sa (chain, proposals); + ikev2_sa_free_proposal_vector (&proposals); + + sa.is_initiator = 1; + sa.profile_index = p - km->profiles; + sa.state = IKEV2_STATE_SA_INIT; + sa.tun_itf = p->tun_itf; + sa.udp_encap = p->udp_encap; + if (p->natt_disabled) + sa.natt_state = IKEV2_NATT_DISABLED; + 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_error_t rc = ikev2_generate_sa_init_data (&sa); + if (rc != IKEV2_GENERATE_SA_INIT_OK) + { + ikev2_sa_free_all_vec (&sa); + ikev2_payload_destroy_chain (chain); + return clib_error_return (0, "%U", format_ikev2_gen_sa_error, rc); + } + + ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data); + ikev2_payload_add_nonce (chain, sa.i_nonce); + + /* Build the child SA proposal */ + vec_resize (sa.childs, 1); + ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts, + &sa.childs[0].i_proposals, 0); + sa.childs[0].i_proposals[0].proposal_num = 1; + sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP; + 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_sha1 = ikev2_compute_nat_sha1 ( + clib_host_to_net_u64 (sa.ispi), clib_host_to_net_u64 (sa.rspi), &src_if_ip, + clib_host_to_net_u16 (IKEV2_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), + &p->responder.addr, + clib_host_to_net_u16 (sa.dst_port)); + ikev2_payload_add_notify (chain, + IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP, + nat_detection_sha1); + vec_free (nat_detection_sha1); + + u8 *sig_hash_algo = vec_new (u8, 8); + u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004); + clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig)); + ikev2_payload_add_notify (chain, + IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS, + sig_hash_algo); + vec_free (sig_hash_algo); + + bi0 = ikev2_get_new_ike_header_buff (vm, &b0); + if (!bi0) + { + ikev2_sa_free_all_vec (&sa); + ikev2_payload_destroy_chain (chain); + char *errmsg = "buffer alloc failure"; + ikev2_log_error (errmsg); + return clib_error_return (0, errmsg); + } + ike0 = vlib_buffer_get_current (b0); + + /* Buffer update and boilerplate */ + len += vec_len (chain->data); + ike0->nextpayload = chain->first_payload_type; + ike0->length = clib_host_to_net_u32 (len); + clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data)); + ikev2_payload_destroy_chain (chain); + + ike0->version = IKE_VERSION_2; + ike0->flags = IKEV2_HDR_FLAG_INITIATOR; + ike0->exchange = IKEV2_EXCHANGE_SA_INIT; + ike0->ispi = clib_host_to_net_u64 (sa.ispi); + ike0->rspi = 0; + ike0->msgid = 0; + sa.last_init_msg_id += 1; + + /* store whole IKE payload - needed for PSK auth */ + vec_reset_length (sa.last_sa_init_req_packet_data); + vec_add (sa.last_sa_init_req_packet_data, ike0, len); + + /* add data to the SA then add it to the pool */ + ip_address_copy (&sa.iaddr, &src_if_ip); + ip_address_copy (&sa.raddr, &p->responder.addr); + sa.i_id.type = p->loc_id.type; + sa.i_id.data = vec_dup (p->loc_id.data); + sa.r_id.type = p->rem_id.type; + sa.r_id.data = vec_dup (p->rem_id.data); + 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); + + ikev2_initial_contact_cleanup (0, &sa); + + /* add SA to the pool */ + ikev2_sa_t *sa0 = 0; + pool_get (km->sais, sa0); + clib_memcpy_fast (sa0, &sa, sizeof (*sa0)); + hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais); + + if (valid_ip) + { + ikev2_send_ike (vm, &src_if_ip, &p->responder.addr, bi0, len, IKEV2_PORT, + sa.dst_port, sa.sw_if_index); + + ikev2_elog_exchange + ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ", + clib_host_to_net_u64 (sa0->ispi), 0, + ip_addr_v4 (&p->responder.addr).as_u32, + ip_addr_version (&p->responder.addr) == AF_IP4); + } return 0; } @@ -3487,22 +4475,34 @@ ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa, ikev2_main_t *km = &ikev2_main; ike_header_t *ike0; u32 bi0 = 0; + vlib_buffer_t *b0; int len; - bi0 = ikev2_get_new_ike_header_buff (vm, &ike0); - + bi0 = ikev2_get_new_ike_header_buff (vm, &b0); + if (!bi0) + { + ikev2_log_error ("buffer alloc failure"); + return; + } + ike0 = vlib_buffer_get_current (b0); ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL; ike0->ispi = clib_host_to_net_u64 (sa->ispi); ike0->rspi = clib_host_to_net_u64 (sa->rspi); + ike0->flags = 0; vec_resize (sa->del, 1); sa->del->protocol_id = IKEV2_PROTOCOL_ESP; 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); + ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id); + sa->last_init_msg_id += 1; + len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0); + if (~0 == len) + return; - ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len); + if (ikev2_natt_active (sa)) + 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); @@ -3525,14 +4525,14 @@ ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi) if (fchild) break; /* *INDENT-OFF* */ - pool_foreach (sa, tkm->sas, ({ + pool_foreach (sa, tkm->sas) { fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1); if (fchild) { fsa = sa; break; } - })); + } /* *INDENT-ON* */ } @@ -3565,14 +4565,14 @@ ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi) if (fsa) break; /* *INDENT-OFF* */ - pool_foreach (sa, tkm->sas, ({ + pool_foreach (sa, tkm->sas) { if (sa->ispi == ispi) { fsa = sa; ftkm = tkm; break; } - })); + } /* *INDENT-ON* */ } @@ -3582,46 +4582,7 @@ ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi) return r; } - - /* Create the Initiator notification for IKE SA removal */ - { - ike_header_t *ike0; - u32 bi0 = 0; - int len; - - bi0 = ikev2_get_new_ike_header_buff (vm, &ike0); - - - ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL; - ike0->ispi = clib_host_to_net_u64 (fsa->ispi); - ike0->rspi = clib_host_to_net_u64 (fsa->rspi); - vec_resize (fsa->del, 1); - fsa->del->protocol_id = IKEV2_PROTOCOL_IKE; - 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); - } - - - /* delete local SA */ - ikev2_child_sa_t *c; - vec_foreach (c, fsa->childs) - { - ikev2_delete_tunnel_interface (km->vnet_main, fsa, c); - ikev2_sa_del_child_sa (fsa, c); - } - ikev2_sa_free_all_vec (fsa); - uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi); - if (p) - { - hash_unset (ftkm->sa_by_rspi, fsa->rspi); - pool_put (ftkm->sas, fsa); - } - - + ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1); return 0; } @@ -3631,22 +4592,28 @@ ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa, { /* Create the Initiator request for create child SA */ ike_header_t *ike0; + vlib_buffer_t *b0; u32 bi0 = 0; int len; + bi0 = ikev2_get_new_ike_header_buff (vm, &b0); + if (!bi0) + { + ikev2_log_error ("buffer alloc failure"); + return; + } - bi0 = ikev2_get_new_ike_header_buff (vm, &ike0); - - + ike0 = vlib_buffer_get_current (b0); ike0->version = IKE_VERSION_2; ike0->flags = IKEV2_HDR_FLAG_INITIATOR; ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA; 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); + ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id); + sa->last_init_msg_id += 1; ikev2_rekey_t *rekey; + vec_reset_length (sa->rekey); vec_add2 (sa->rekey, rekey, 1); ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals); @@ -3654,8 +4621,14 @@ 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 (b0, sa, ike0, proposals, 0, 0); + if (~0 == len) + return; + + if (ikev2_natt_active (sa)) + 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); } @@ -3675,14 +4648,14 @@ ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi) if (fchild) break; /* *INDENT-OFF* */ - pool_foreach (sa, tkm->sas, ({ + pool_foreach (sa, tkm->sas) { fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1); if (fchild) { fsa = sa; break; } - })); + } /* *INDENT-ON* */ } @@ -3699,6 +4672,74 @@ ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi) return 0; } +static int +ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index) +{ + return (sa->sw_if_index == sw_if_index) && sa->is_initiator; +} + +static void +ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index) +{ + u64 *ispi, *ispi_vec = 0; + ikev2_sa_t *sa, **sap, **sa_vec = 0; + ikev2_main_t *km = &ikev2_main; + ikev2_main_per_thread_data_t *tkm; + p->responder.sw_if_index = ~0; + + vec_foreach (tkm, km->per_thread_data) + { + /* *INDENT-OFF* */ + pool_foreach (sa, tkm->sas) { + if (ikev2_sa_sw_if_match (sa, sw_if_index)) + vec_add1 (sa_vec, sa); + } + /* *INDENT-ON* */ + + vec_foreach (sap, sa_vec) + { + ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0); + } + vec_reset_length (sa_vec); + } + vec_free (sa_vec); + + /* *INDENT-OFF* */ + pool_foreach (sa, km->sais) { + if (ikev2_sa_sw_if_match (sa, sw_if_index)) + vec_add1 (ispi_vec, sa->ispi); + } + /* *INDENT-ON* */ + + vec_foreach (ispi, ispi_vec) + { + ikev2_del_sa_init_from_main (ispi); + } + + vec_free (ispi_vec); +} + +static clib_error_t * +ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add) +{ + ikev2_main_t *km = &ikev2_main; + ikev2_profile_t *p; + + if (is_add) + return 0; + + /* *INDENT-OFF* */ + pool_foreach (p, km->profiles) { + if (p->responder.sw_if_index == sw_if_index) + ikev2_sa_del (p, sw_if_index); + } + /* *INDENT-ON* */ + + return 0; +} + +VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del); + clib_error_t * ikev2_init (vlib_main_t * vm) { @@ -3718,29 +4759,50 @@ ikev2_init (vlib_main_t * vm) vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1, CLIB_CACHE_LINE_BYTES); - for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++) + for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++) { - km->per_thread_data[thread_id].sa_by_rspi = - hash_create (0, sizeof (uword)); + ikev2_main_per_thread_data_t *ptd = + vec_elt_at_index (km->per_thread_data, thread_id); + + ptd->sa_by_rspi = hash_create (0, sizeof (uword)); + +#if OPENSSL_VERSION_NUMBER >= 0x10100000L + ptd->evp_ctx = EVP_CIPHER_CTX_new (); + ptd->hmac_ctx = HMAC_CTX_new (); +#else + EVP_CIPHER_CTX_init (&ptd->_evp_ctx); + ptd->evp_ctx = &ptd->_evp_ctx; + HMAC_CTX_init (&(ptd->_hmac_ctx)); + ptd->hmac_ctx = &ptd->_hmac_ctx; +#endif } 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_ip4.index, 1); + udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0); + udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1); + udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0); + vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4-natt"); + vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0], + "ikev2-ip4-natt"); ikev2_cli_reference (); + km->dns_resolve_name = + vlib_get_plugin_symbol ("dns_plugin.so", "dns_resolve_name"); + if (!km->dns_resolve_name) + ikev2_log_error ("cannot load symbols from dns plugin"); + km->log_level = IKEV2_LOG_ERROR; km->log_class = vlib_log_register_class ("ikev2", 0); return 0; } /* *INDENT-OFF* */ -VLIB_INIT_FUNCTION (ikev2_init) = -{ - .runs_after = VLIB_INITS("ipsec_init"), +VLIB_INIT_FUNCTION (ikev2_init) = { + .runs_after = VLIB_INITS ("ipsec_init", "ipsec_punt_init", "dns_init"), }; /* *INDENT-ON* */ @@ -3754,7 +4816,7 @@ ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa, f64 now = vlib_time_now (vm); u8 res = 0; - if (sa->is_profile_index_set) + if (sa->profile_index != ~0) p = pool_elt_at_index (km->profiles, sa->profile_index); if (sa->is_initiator && p && csa->time_to_expiration @@ -3786,6 +4848,7 @@ ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa, csa->time_to_expiration = 0; ikev2_delete_child_sa_internal (vm, sa, csa); res |= 1; + return res; } } @@ -3799,13 +4862,17 @@ ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa, ip46_address_t remote_ip; if (sa->is_initiator) { - ip46_address_set_ip4 (&local_ip, &sa->iaddr); - ip46_address_set_ip4 (&remote_ip, &sa->raddr); + local_ip = to_ip46 (ip_addr_version (&sa->iaddr), + ip_addr_bytes (&sa->iaddr)); + remote_ip = to_ip46 (ip_addr_version (&sa->raddr), + ip_addr_bytes (&sa->raddr)); } else { - ip46_address_set_ip4 (&local_ip, &sa->raddr); - ip46_address_set_ip4 (&remote_ip, &sa->iaddr); + local_ip = to_ip46 (ip_addr_version (&sa->raddr), + ip_addr_bytes (&sa->raddr)); + remote_ip = to_ip46 (ip_addr_version (&sa->iaddr), + ip_addr_bytes (&sa->iaddr)); } /* *INDENT-OFF* */ @@ -3827,8 +4894,13 @@ ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa, u32 *sas_in = NULL; vec_add1 (sas_in, csa->remote_sa_id); - ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in); + vlib_worker_thread_barrier_sync (vm); + int rv = ipsec_tun_protect_update (sw_if_index, NULL, + csa->local_sa_id, sas_in); + if (rv) + vec_free (sas_in); ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id)); + vlib_worker_thread_barrier_release (vm); } return res; @@ -3862,6 +4934,17 @@ ikev2_set_liveness_params (u32 period, u32 max_retries) return 0; } +clib_error_t * +ikev2_profile_natt_disable (u8 * name) +{ + ikev2_profile_t *p = ikev2_profile_index_by_name (name); + if (!p) + return clib_error_return (0, "unknown profile %v", name); + + p->natt_disabled = 1; + return 0; +} + static void ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa) { @@ -3881,20 +4964,20 @@ ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa) if (fchild) break; /* *INDENT-OFF* */ - pool_foreach (sa, tkm->sas, ({ + pool_foreach (sa, tkm->sas) { fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1); if (fchild) { fsa = sa; break; } - })); + } /* *INDENT-ON* */ } vlib_get_combined_counter (&ipsec_sa_counters, ipsec_sa->stat_index, &counts); - if (fsa && fsa->is_profile_index_set) + if (fsa && fsa->profile_index != ~0 && fsa->is_initiator) p = pool_elt_at_index (km->profiles, fsa->profile_index); if (fchild && p && p->lifetime_maxdata) @@ -3907,7 +4990,81 @@ ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa) } static void -ikev2_process_pending_sa_init (ikev2_main_t * km) +ikev2_process_pending_sa_init_one (vlib_main_t *vm, ikev2_main_t *km, + ikev2_sa_t *sa) +{ + ikev2_profile_t *p; + u32 bi0; + u8 *nat_sha, *np; + p = pool_elt_at_index (km->profiles, sa->profile_index); + + if (!p->responder.is_resolved) + { + clib_error_t *r = ikev2_resolve_responder_hostname (vm, &p->responder); + if (r) + { + clib_error_free (r); + return; + } + + if (!p->responder.is_resolved) + return; + + ip_address_copy (&sa->raddr, &p->responder.addr); + + /* update nat detection destination hash */ + np = ikev2_find_ike_notify_payload ( + (ike_header_t *) sa->last_sa_init_req_packet_data, + IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP); + if (np) + { + nat_sha = ikev2_compute_nat_sha1 ( + clib_host_to_net_u64 (sa->ispi), clib_host_to_net_u64 (sa->rspi), + &sa->raddr, clib_host_to_net_u16 (sa->dst_port)); + clib_memcpy_fast (np, nat_sha, vec_len (nat_sha)); + vec_free (nat_sha); + } + } + + if (ip_address_is_zero (&sa->iaddr)) + { + if (!ikev2_get_if_address (p->responder.sw_if_index, + ip_addr_version (&p->responder.addr), + &sa->iaddr)) + return; + + /* update NAT detection payload */ + np = + ikev2_find_ike_notify_payload + ((ike_header_t *) sa->last_sa_init_req_packet_data, + IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP); + if (np) + { + nat_sha = + ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi), + clib_host_to_net_u64 (sa->rspi), + &sa->iaddr, + clib_host_to_net_u16 (IKEV2_PORT)); + clib_memcpy_fast (np, nat_sha, vec_len (nat_sha)); + vec_free (nat_sha); + } + } + + if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1) + return; + + vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0); + clib_memcpy_fast (vlib_buffer_get_current (b), + 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), + ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index); +} + +static void +ikev2_process_pending_sa_init (vlib_main_t *vm, ikev2_main_t *km) { u32 sai; u64 ispi; @@ -3920,39 +5077,42 @@ ikev2_process_pending_sa_init (ikev2_main_t * km) if (sa->init_response_received) continue; - u32 bi0; - if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1) - return; - - vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0); - clib_memcpy_fast (vlib_buffer_get_current (b), - 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)); + ikev2_process_pending_sa_init_one (vm, km, sa); })); /* *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; + ip_address_t *src, *dst; ike_header_t *ike0; + vlib_buffer_t *b0; u32 bi0 = 0; + u16 dp; int len; - bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &ike0); + bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0); + if (!bi0) + { + ikev2_log_error ("buffer alloc failure"); + return; + } + ike0 = vlib_buffer_get_current (b0); 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); + ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id); + ike0->flags = 0; + sa->last_init_msg_id += 1; + len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0); + if (~0 == len) + return; + + if (ikev2_natt_active (sa)) + len = ikev2_insert_non_esp_marker (ike0, len); if (sa->is_initiator) { @@ -3961,12 +5121,20 @@ ikev2_send_informational_request (ikev2_sa_t * sa) } else { - dst = &sa->iaddr; src = &sa->raddr; } - ikev2_send_ike (km->vlib_main, src, dst, bi0, len); + 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); +} + +void +ikev2_disable_dpd (void) +{ + ikev2_main_t *km = &ikev2_main; + km->dpd_disabled = 1; } static_always_inline int @@ -3975,7 +5143,7 @@ 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) + if (!sa->keys_generated) return 0; if (sa->liveness_retries >= km->liveness_max_retries) @@ -3997,15 +5165,13 @@ 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) { - u8 req_sent = 0; - vlib_process_wait_for_event_or_clock (vm, 1); + vlib_process_wait_for_event_or_clock (vm, 2); vlib_process_get_events (vm, NULL); /* process ike child sas */ @@ -4016,9 +5182,13 @@ ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt, u32 *to_be_deleted = 0; /* *INDENT-OFF* */ - pool_foreach (sa, tkm->sas, ({ + pool_foreach (sa, tkm->sas) { ikev2_child_sa_t *c; u8 del_old_ids = 0; + + if (sa->state != IKEV2_STATE_AUTHENTICATED) + continue; + if (sa->old_remote_id_present && 0 > sa->old_id_expiration) { sa->old_remote_id_present = 0; @@ -4028,51 +5198,53 @@ ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt, sa->old_id_expiration -= 1; vec_foreach (c, sa->childs) - { - req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids); - } + ikev2_mngr_process_child_sa(sa, c, del_old_ids); - if (ikev2_mngr_process_responder_sas (sa)) + if (!km->dpd_disabled && 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]); - if (sa->is_initiator && sa->is_profile_index_set) + u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0); + 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); - continue; + clib_error_t *e = ikev2_initiate_sa_init (vm, p->name); + if (e) + { + ikev2_log_error ("%U", format_clib_error, e); + clib_error_free (e); + } } } - vec_foreach (c, sa->childs) - ikev2_delete_tunnel_interface (km->vnet_main, sa, c); - hash_unset (tkm->sa_by_rspi, sa->rspi); - pool_put (tkm->sas, sa); } + vec_free (to_be_deleted); } /* process ipsec sas */ ipsec_sa_t *sa; /* *INDENT-OFF* */ - pool_foreach (sa, im->sad, ({ - ikev2_mngr_process_ipsec_sa(sa); - })); - /* *INDENT-ON* */ - - ikev2_process_pending_sa_init (km); - - if (req_sent) + pool_foreach (sa, ipsec_sa_pool) { - vlib_process_wait_for_event_or_clock (vm, 5); - vlib_process_get_events (vm, NULL); - req_sent = 0; + ikev2_mngr_process_ipsec_sa (sa); } + /* *INDENT-ON* */ + ikev2_process_pending_sa_init (vm, km); } return 0; }