fort Socket
Fork of Socket by
Diff: TCPSocketConnection.cpp
- Revision:
- 3:e6474399e057
- Child:
- 4:75988d748e4d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TCPSocketConnection.cpp Wed Jul 25 14:59:37 2012 +0000 @@ -0,0 +1,146 @@ +/* Copyright (C) 2012 mbed.org, MIT License + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of this software + * and associated documentation files (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, publish, distribute, + * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all copies or + * substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING + * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ +#include "TCPSocketConnection.h" +#include <cstring> + +using std::memset; +using std::memcpy; + +TCPSocketConnection::TCPSocketConnection() : + _closedByRemoteHost(false) { + memset(&_remoteHost, 0, sizeof(struct sockaddr_in)); + _ipAddress[0] = '\0'; +} + +int TCPSocketConnection::connect(char* host, int port) { + if (init(SOCK_STREAM) < 0) + return -1; + + //Resolve DNS address or populate hard-coded IP address + struct hostent *server = gethostbyname(host); + if (server == NULL) + return -1; //Could not resolve address + + memcpy((char*) &_remoteHost.sin_addr.s_addr, + (char*) server->h_addr_list[0], server->h_length); + + _remoteHost.sin_family = AF_INET; + _remoteHost.sin_port = htons(port); + if (lwip_connect(_sock_fd, (const struct sockaddr *) &_remoteHost, sizeof(_remoteHost)) < 0) { + close(); + return -1; + } + + return 0; +} + +int TCPSocketConnection::send(char* data, int length, int timeout) { + if ((_sock_fd < 0) || _closedByRemoteHost) + return -1; + + set_timeout(timeout); + if (wait_writable() != 0) + return -1; + + int n = lwip_send(_sock_fd, data, length, 0); + _closedByRemoteHost = (n == 0); + + return n; +} + +// -1 if unsuccessful, else number of bytes written +int TCPSocketConnection::send_all(char* data, int length, int timeout) { + if ((_sock_fd < 0) || _closedByRemoteHost) + return -1; + + size_t writtenLen = 0; + set_timeout(timeout); + while (writtenLen < length) { + // Wait for socket to be writeable + if (wait_writable() != 0) + return writtenLen; //Timeout -- FIXME should we return -1 or writtenLength ? + + int ret = lwip_send(_sock_fd, data + writtenLen, length - writtenLen, 0); + if (ret > 0) { + writtenLen += ret; + continue; + } else if (ret == 0) { + _closedByRemoteHost = true; + return writtenLen; //Connection was closed by remote host -- FIXME how do we signal that the connection was closed ? + } else { + return -1; //Connnection error + } + } + + return writtenLen; +} + +int TCPSocketConnection::receive(char* data, int length, int timeout) { + if ((_sock_fd < 0) || _closedByRemoteHost) + return -1; + + set_timeout(timeout); + if (wait_readable() != 0) + return -1; + + int n = lwip_recv(_sock_fd, data, length, 0); + _closedByRemoteHost = (n == 0); + + return n; +} + +// -1 if unsuccessful, else number of bytes received +int TCPSocketConnection::receive_all(char* data, int length, int timeout) { + if ((_sock_fd < 0) || _closedByRemoteHost) + return -1; + + size_t readLen = 0; + set_timeout(timeout); + while (readLen < length) { + //Wait for socket to be readable + if (wait_readable() != 0) + return readLen; //Timeout -- FIXME should we return -1 or writtenLength ? + + int ret = lwip_recv(_sock_fd, data + readLen, length - readLen, 0); + if (ret > 0) { + readLen += ret; + } else if (ret == 0) { + _closedByRemoteHost = true; + return readLen; //Connection was closed by remote host -- FIXME how do we signal that the connection was closed ? + } else { + return -1; //Connnection error + } + } + return readLen; +} + +char* TCPSocketConnection::get_address() { + if (_ipAddress[0] == '\0') { + if (_remoteHost.sin_addr.s_addr == 0) + return NULL; + inet_ntoa_r(_remoteHost.sin_addr, _ipAddress, sizeof(_ipAddress)); + } + return _ipAddress; +} +int TCPSocketConnection::get_port() { + return ntohs(_remoteHost.sin_port); +} + +TCPSocketConnection::~TCPSocketConnection() { + close(); //Don't want to leak +}