diff options
Diffstat (limited to 'src/plugins/ikev2/ikev2.c')
| -rw-r--r-- | src/plugins/ikev2/ikev2.c | 147 |
1 files changed, 119 insertions, 28 deletions
diff --git a/src/plugins/ikev2/ikev2.c b/src/plugins/ikev2/ikev2.c index aeed73ecdc3..fa653760b1d 100644 --- a/src/plugins/ikev2/ikev2.c +++ b/src/plugins/ikev2/ikev2.c @@ -26,6 +26,7 @@ #include <vnet/ipip/ipip.h> #include <plugins/ikev2/ikev2.h> #include <plugins/ikev2/ikev2_priv.h> +#include <plugins/dns/dns.h> #include <openssl/sha.h> #include <vnet/ipsec/ipsec_punt.h> #include <plugins/ikev2/ikev2.api_enum.h> @@ -3857,6 +3858,12 @@ ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p) } static void +ikev2_profile_responder_free (ikev2_responder_t *r) +{ + vec_free (r->hostname); +} + +static void ikev2_profile_free (ikev2_profile_t * p) { vec_free (p->name); @@ -3865,6 +3872,8 @@ ikev2_profile_free (ikev2_profile_t * p) if (p->auth.key) EVP_PKEY_free (p->auth.key); + ikev2_profile_responder_free (&p->responder); + vec_free (p->loc_id.data); vec_free (p->rem_id.data); } @@ -4042,6 +4051,27 @@ ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id, 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, @@ -4058,6 +4088,7 @@ 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; ip_address_copy (&p->responder.addr, &addr); @@ -4226,6 +4257,31 @@ ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af, 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) { @@ -4236,7 +4292,7 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) ike_header_t *ike0; u32 bi0 = 0; int len = sizeof (ike_header_t), valid_ip = 0; - ip_address_t if_ip = ip_address_initializer; + ip_address_t src_if_ip = ip_address_initializer; p = ikev2_profile_index_by_name (name); @@ -4246,15 +4302,26 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) return r; } - if (p->responder.sw_if_index == ~0 - || ip_address_is_zero (&p->responder.addr)) + 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 (ikev2_get_if_address (p->responder.sw_if_index, - ip_addr_version (&p->responder.addr), &if_ip)) + 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; + } + + 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; } @@ -4308,10 +4375,9 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) 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), - &if_ip, clib_host_to_net_u16 (IKEV2_PORT)); + 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); @@ -4365,7 +4431,7 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) 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, &if_ip); + 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); @@ -4388,8 +4454,8 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) if (valid_ip) { - ikev2_send_ike (vm, &if_ip, &p->responder.addr, bi0, len, - IKEV2_PORT, sa.dst_port, sa.sw_if_index); + 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 ", @@ -4397,14 +4463,6 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) ip_addr_v4 (&p->responder.addr).as_u32, ip_addr_version (&p->responder.addr) == AF_IP4); } - else - { - r = - clib_error_return (0, "interface %U does not have any IP address!", - format_vnet_sw_if_index_name, vnet_get_main (), - p->responder.sw_if_index); - return r; - } return 0; } @@ -4732,15 +4790,19 @@ ikev2_init (vlib_main_t * vm) "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", "ipsec_punt_init"), +VLIB_INIT_FUNCTION (ikev2_init) = { + .runs_after = VLIB_INITS ("ipsec_init", "ipsec_punt_init", "dns_init"), }; /* *INDENT-ON* */ @@ -4928,15 +4990,44 @@ ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa) } static void -ikev2_process_pending_sa_init_one (ikev2_main_t * km, ikev2_sa_t * sa) +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)) { - p = pool_elt_at_index (km->profiles, sa->profile_index); if (!ikev2_get_if_address (p->responder.sw_if_index, ip_addr_version (&p->responder.addr), &sa->iaddr)) @@ -4973,7 +5064,7 @@ ikev2_process_pending_sa_init_one (ikev2_main_t * km, ikev2_sa_t * sa) } static void -ikev2_process_pending_sa_init (ikev2_main_t * km) +ikev2_process_pending_sa_init (vlib_main_t *vm, ikev2_main_t *km) { u32 sai; u64 ispi; @@ -4986,7 +5077,7 @@ ikev2_process_pending_sa_init (ikev2_main_t * km) if (sa->init_response_received) continue; - ikev2_process_pending_sa_init_one (km, sa); + ikev2_process_pending_sa_init_one (vm, km, sa); })); /* *INDENT-ON* */ } @@ -5153,7 +5244,7 @@ ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt, } /* *INDENT-ON* */ - ikev2_process_pending_sa_init (km); + ikev2_process_pending_sa_init (vm, km); } return 0; } |