/* * Copyright (c) 2016 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include #include #include #include #include /** @file VPP's application/session API bind/unbind/connect/disconnect calls */ static u8 ip_is_zero (ip46_address_t * ip46_address, u8 is_ip4) { if (is_ip4) return (ip46_address->ip4.as_u32 == 0); else return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 0); } static u8 ip_is_local (ip46_address_t * ip46_address, u8 is_ip4) { fib_node_index_t fei; fib_entry_flag_t flags; fib_prefix_t prefix; /* Check if requester is local */ if (is_ip4) { prefix.fp_len = 32; prefix.fp_proto = FIB_PROTOCOL_IP4; } else { prefix.fp_len = 128; prefix.fp_proto = FIB_PROTOCOL_IP6; } clib_memcpy (&prefix.fp_addr, ip46_address, sizeof (ip46_address_t)); fei = fib_table_lookup (0, &prefix); flags = fib_entry_get_flags (fei); return (flags & FIB_ENTRY_FLAG_LOCAL); } int api_parse_session_handle (u64 handle, u32 * session_index, u32 * thread_index) { session_manager_main_t *smm = vnet_get_session_manager_main (); stream_session_t *pool; *thread_index = handle & 0xFFFFFFFF; *session_index = handle >> 32; if (*thread_index >= vec_len (smm->sessions)) return VNET_API_ERROR_INVALID_VALUE; pool = smm->sessions[*thread_index]; if (pool_is_free_index (pool, *session_index)) return VNET_API_ERROR_INVALID_VALUE_2; return 0; } int vnet_bind_i (u32 api_client_index, ip46_address_t * ip46, u16 port_host_order, session_type_t sst, u64 * options, session_cb_vft_t * cb_fns, application_t ** app, u32 * len_seg_name, char *seg_name) { u8 *segment_name = 0; application_t *server = 0; stream_session_t *listener; u8 is_ip4; listener = stream_session_lookup_listener (ip46, clib_host_to_net_u16 (port_host_order), sst); if (listener) return VNET_API_ERROR_ADDRESS_IN_USE; if (application_lookup (api_client_index)) { clib_warning ("Only one connection supported for now"); return VNET_API_ERROR_ADDRESS_IN_USE; } is_ip4 = SESSION_TYPE_IP4_UDP == sst || SESSION_TYPE_IP4_TCP == sst; if (!ip_is_zero (ip46, is_ip4) && !ip_is_local (ip46, is_ip4)) return VNET_API_ERROR_INVALID_VALUE; /* Allocate and initialize stream server */ server = application_new (APP_SERVER, sst, api_client_index, options[SESSION_OPTIONS_FLAGS], cb_fns); application_server_init (server, options[SESSION_OPTIONS_SEGMENT_SIZE], options[SESSION_OPTIONS_ADD_SEGMENT_SIZE], options[SESSION_OPTIONS_RX_FIFO_SIZE], options[SESSION_OPTIONS_TX_FIFO_SIZE], &segment_name); /* Setup listen path down to transport */ stream_session_start_listen (server->index, ip46, port_host_order); /* * Return values */ ASSERT (vec_len (segment_name) <= 128); *len_seg_name = vec_len (segment_name); memcpy (seg_name, segment_name, *len_seg_name); *app = server; return 0; } int vnet_unbind_i (u32 api_client_index) { application_t *server; /* * Find the stream_server_t corresponding to the api client */ server = application_lookup (api_client_index); if (!server) return VNET_API_ERROR_INVALID_VALUE_2; /* Clear the listener */ stream_session_stop_listen (server->index); application_del (server); return 0; } int vnet_connect_i (u32 api_client_index, u32 api_context, session_type_t sst, ip46_address_t * ip46, u16 port, u64 * options, void *mp, session_cb_vft_t * cb_fns) { stream_session_t *listener; application_t *server, *app; /* * Figure out if connecting to a local server */ listener = stream_session_lookup_listener (ip46, clib_host_to_net_u16 (port), sst); if (listener) { server = application_get (listener->app_index); /* * Server is willing to have a direct fifo connection created * instead of going through the state machine, etc. */ if (server->flags & SESSION_OPTIONS_FLAGS_USE_FIFO) return server->cb_fns. redirect_connect_callback (server->api_client_index, mp); } /* Create client app */ app = application_new (APP_CLIENT, sst, api_client_index, options[SESSION_OPTIONS_FLAGS], cb_fns); app->api_context = api_context; /* * Not connecting to a local server. Create regular session */ return stream_session_open (sst, ip46, port, app->index); } /** * unformat a vnet URI * * fifo://name * tcp://ip46-addr:port * udp://ip46-addr:port * * u8 ip46_address[16]; * u16 port_in_host_byte_order; * stream_session_type_t sst; * u8 *fifo_name; * * if (unformat (input, "%U", unformat_vnet_uri, &ip46_address, * &sst, &port, &fifo_name)) * etc... * */ uword unformat_vnet_uri (unformat_input_t * input, va_list * args) { ip46_address_t *address = va_arg (*args, ip46_address_t *); session_type_t *sst = va_arg (*args, session_type_t *); u16 *port = va_arg (*args, u16 *); if (unformat (input, "tcp://%U/%d", unformat_ip4_address, &address->ip4, port)) { *sst = SESSION_TYPE_IP4_TCP; return 1; } if (unformat (input, "udp://%U/%d", unformat_ip4_address, &address->ip4, port)) { *sst = SESSION_TYPE_IP4_UDP; return 1; } if (unformat (input, "udp://%U/%d", unformat_ip6_address, &address->ip6, port)) { *sst = SESSION_TYPE_IP6_UDP; return 1; } if (unformat (input, "tcp://%U/%d", unformat_ip6_address, &address->ip6, port)) { *sst = SESSION_TYPE_IP6_TCP; return 1; } return 0; } int parse_uri (char *uri, session_type_t * sst, ip46_address_t * addr, u16 * port_number_host_byte_order) { unformat_input_t _input, *input = &_input; /* Make sure */ uri = (char *) format (0, "%s%c", uri, 0); /* Parse uri */ unformat_init_string (input, uri, strlen (uri)); if (!unformat (input, "%U", unformat_vnet_uri, addr, sst, port_number_host_byte_order)) { unformat_free (input); return VNET_API_ERROR_INVALID_VALUE; } unformat_free (input); return 0; } int vnet_bind_uri (vnet_bind_args_t * a) { application_t *server = 0; u16 port_host_order; session_type_t sst = SESSION_N_TYPES; ip46_address_t ip46; int rv; memset (&ip46, 0, sizeof (ip46)); rv = parse_uri (a->uri, &sst, &ip46, &port_host_order); if (rv) return rv; if ((rv = vnet_bind_i (a->api_client_index, &ip46, port_host_order, sst, a->options, a->session_cb_vft, &server, &a->segment_name_length, a->segment_name))) return rv; a->server_event_queue_address = (u64) server->event_queue; return 0; } session_type_t session_type_from_proto_and_ip (session_api_proto_t proto, u8 is_ip4) { if (proto == SESSION_PROTO_TCP) { if (is_ip4) return SESSION_TYPE_IP4_TCP; else return SESSION_TYPE_IP6_TCP; } else { if (is_ip4) return SESSION_TYPE_IP4_UDP; else return SESSION_TYPE_IP6_UDP; } return SESSION_N_TYPES; } int vnet_unbind_uri (char *uri, u32 api_client_index) { u16 port_number_host_byte_order; session_type_t sst = SESSION_N_TYPES; ip46_address_t ip46_address; stream_session_t *listener; int rv; rv = parse_uri (uri, &sst, &ip46_address, &port_number_host_byte_order); if (rv) return rv; listener = stream_session_lookup_listener (&ip46_address, clib_host_to_net_u16 (port_number_host_byte_order), sst); if (!listener) return VNET_API_ERROR_ADDRESS_NOT_IN_USE; /* External client? */ if (api_client_index != ~0) { ASSERT (vl_api_client_index_to_registration (api_client_index)); } return vnet_unbin