Socket.cpp

00001 /* Copyright (C) 2013 mbed.org, MIT License
00002  *
00003  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
00004  * and associated documentation files (the "Software"), to deal in the Software without restriction,
00005  * including without limitation the rights to use, copy, modify, merge, publish, distribute,
00006  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
00007  * furnished to do so, subject to the following conditions:
00008  *
00009  * The above copyright notice and this permission notice shall be included in all copies or
00010  * substantial portions of the Software.
00011  *
00012  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
00013  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00014  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
00015  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00016  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00017  */
00018 
00019 #include "Socket.h"
00020 #include <cstring>
00021 
00022 Socket::Socket() : _sock_fd(-1), _blocking(true), _timeout(1500) {
00023     _cc3000_module = cc3000::get_instance();
00024     if (_cc3000_module == NULL) {
00025         error("Socket constructor error: no cc3000 instance available!\r\n");
00026     }
00027 }
00028 
00029 int Socket::init_socket(int type, int protocol) {
00030     if (_sock_fd != -1) {
00031         DBG_SOCKET("Socket was initialized previously");
00032         return -1;
00033     }
00034 
00035     int fd = _cc3000_module->_socket.socket(AF_INET, type, protocol);
00036     if (fd < -1) {
00037         DBG_SOCKET("Failed to create new socket (type: %d, protocol: %d)",type, protocol);
00038         return -1;
00039     }
00040 
00041     DBG_SOCKET("Socket created (fd: %d type: %d, protocol: %d)",fd, type, protocol);
00042     _sock_fd = fd;
00043 
00044     return 0;
00045 }
00046 
00047 void Socket::set_blocking(bool blocking, unsigned int timeout) {
00048     _blocking = blocking;
00049     _timeout = timeout;
00050 }
00051 
00052 int Socket::set_option(int level, int optname, const void *optval, socklen_t optlen) {
00053 #ifndef CC3000_TINY_DRIVER
00054     return _cc3000_module->_socket.setsockopt(_sock_fd, level, optname, optval, optlen);
00055 #else
00056     return -1;
00057 #endif
00058 }
00059 
00060 int Socket::get_option(int level, int optname, void *optval, socklen_t *optlen) {
00061     return _cc3000_module->_socket.getsockopt(_sock_fd, level, optname, optval, optlen);
00062 }
00063 
00064 int Socket::select(struct timeval *timeout, bool read, bool write) {
00065     if (_sock_fd < 0) {
00066         return -1;
00067     }
00068 
00069     fd_set fdSet;
00070     FD_ZERO(&fdSet);
00071     FD_SET(_sock_fd, &fdSet);
00072 
00073     fd_set* readset  = (read ) ? (&fdSet) : (NULL);
00074     fd_set* writeset = (write) ? (&fdSet) : (NULL);
00075 
00076     int ret = _cc3000_module->_socket.select(_sock_fd+1, readset, writeset, NULL, timeout);
00077 
00078     DBG_SOCKET("Select on sock_fd: %d, returns %d. fdSet: %d", _sock_fd, ret, FD_ISSET(_sock_fd, &fdSet));
00079 
00080     // TODO
00081     //return (ret <= 0 || !FD_ISSET(_sock_fd, &fdSet)) ? (-1) : (0);
00082     if (FD_ISSET(_sock_fd, &fdSet)) {
00083         return 0;
00084     } else {
00085         return -1;
00086     }
00087 }
00088 
00089 int Socket::wait_readable(TimeInterval& timeout) {
00090     return select(&timeout._time, true, false);
00091 }
00092 
00093 int Socket::wait_writable(TimeInterval& timeout) {
00094     return select(&timeout._time, false, true);
00095 }
00096 
00097 int Socket::close() {
00098     if (_sock_fd < 0 ) {
00099         return -1;
00100     }
00101 
00102     _cc3000_module->_socket.closesocket(_sock_fd);
00103     _sock_fd = -1;
00104     return 0;
00105 }
00106 
00107 Socket::~Socket() {
00108     close();
00109 }
00110 
00111 TimeInterval::TimeInterval(unsigned int ms) {
00112     _time.tv_sec = ms / 1000;
00113     _time.tv_usec = (ms - (_time.tv_sec * 1000)) * 1000;
00114 }