diff options
Diffstat (limited to 'src/plugins/ikev2/ikev2.c')
| -rw-r--r-- | src/plugins/ikev2/ikev2.c | 93 |
1 files changed, 76 insertions, 17 deletions
diff --git a/src/plugins/ikev2/ikev2.c b/src/plugins/ikev2/ikev2.c index 2423bf2058d..03b402145ad 100644 --- a/src/plugins/ikev2/ikev2.c +++ b/src/plugins/ikev2/ikev2.c @@ -62,6 +62,37 @@ format_ikev2_trace (u8 * s, va_list * args) return s; } +#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 +{ + 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 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; +} + #define foreach_ikev2_error \ _(PROCESSED, "IKEv2 packets processed") \ _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \ @@ -358,16 +389,14 @@ ikev2_delete_sa (ikev2_main_per_thread_data_t * ptd, ikev2_sa_t * 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) @@ -382,7 +411,7 @@ 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) @@ -407,6 +436,7 @@ 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 @@ -2787,6 +2817,20 @@ ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4, exchange, src, dst); } +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 (PREDICT_TRUE (rc == IKEV2_GENERATE_SA_INIT_OK)) + return; + + 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); +} + static_always_inline uword ikev2_node_internal (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, @@ -2924,7 +2968,7 @@ ikev2_node_internal (vlib_main_t * vm, sa0->r_proposals = ikev2_select_proposal (sa0->i_proposals, IKEV2_PROTOCOL_IKE); - ikev2_generate_sa_init_data (sa0); + ikev2_generate_sa_init_data_and_log (sa0); } if (sa0->state == IKEV2_STATE_SA_INIT @@ -4149,15 +4193,6 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) valid_ip = 1; } - bi0 = ikev2_get_new_ike_header_buff (vm, &b0); - if (!bi0) - { - char *errmsg = "buffer alloc failure"; - ikev2_log_error (errmsg); - return clib_error_return (0, errmsg); - } - ike0 = vlib_buffer_get_current (b0); - /* Prepare the SA and the IKE payload */ ikev2_sa_t sa; clib_memset (&sa, 0, sizeof (ikev2_sa_t)); @@ -4185,7 +4220,15 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) sa.is_tun_itf_set = 1; sa.initial_contact = 1; sa.dst_port = IKEV2_PORT; - ikev2_generate_sa_init_data (&sa); + + 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); @@ -4225,6 +4268,17 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) 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; @@ -5014,7 +5068,12 @@ ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt, p = pool_elt_at_index (km->profiles, sa->profile_index); if (p) { - ikev2_initiate_sa_init (vm, p->name); + 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); + } } } } |