DTLSSocket.cpp

00001 /*
00002  * Copyright (c) 2018 ARM Limited
00003  * SPDX-License-Identifier: Apache-2.0
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License");
00006  * you may not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  *     http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS,
00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 
00018 #include "DTLSSocket.h"
00019 
00020 #define TRACE_GROUP "TLSS"
00021 #include "mbed-trace/mbed_trace.h"
00022 
00023 // This class requires Mbed TLS SSL/TLS client code
00024 #if defined(MBEDTLS_SSL_CLI_C)
00025 
00026 nsapi_error_t DTLSSocket::connect(const char *host, uint16_t port)
00027 {
00028     SocketAddress addr;
00029     nsapi_error_t ret;
00030 
00031     ret = _udp_socket.getpeername (&addr);
00032     if (ret != NSAPI_ERROR_NO_CONNECTION ) {
00033         return ret;
00034     }
00035 
00036     if (!addr || ret == NSAPI_ERROR_NO_CONNECTION ) {
00037         nsapi_error_t err = _udp_socket._stack->gethostbyname(host, &addr);
00038         if (err) {
00039             return NSAPI_ERROR_DNS_FAILURE ;
00040         }
00041 
00042         addr.set_port(port);
00043 
00044         set_hostname(host);
00045         _udp_socket.connect(addr); // UDPSocket::connect() cannot fail
00046     }
00047 
00048     return connect(addr);
00049 }
00050 
00051 DTLSSocket::~DTLSSocket()
00052 {
00053     // Make sure that DTLSSocketWrapper::close() is called before the transport is
00054     // destroyed.
00055     close();
00056 }
00057 
00058 #endif // MBEDTLS_SSL_CLI_C