Socket.cpp

00001 /* Copyright (C) 2012 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 #include "Socket/Socket.h"
00019 #include <cstring>
00020 
00021 using std::memset;
00022 
00023 Socket::Socket() : _sock_fd(-1), _blocking(true), _timeout(1500) {
00024     
00025 }
00026 
00027 void Socket::set_blocking(bool blocking, unsigned int timeout) {
00028     _blocking = blocking;
00029     _timeout = timeout;
00030 }
00031 
00032 int Socket::init_socket(int type) {
00033     if (_sock_fd != -1)
00034         return -1;
00035     
00036     int fd = lwip_socket(AF_INET, type, 0);
00037     if (fd < 0)
00038         return -1;
00039     
00040     _sock_fd = fd;
00041     return 0;
00042 }
00043 
00044 int Socket::set_option(int level, int optname, const void *optval, socklen_t optlen) {
00045     return lwip_setsockopt(_sock_fd, level, optname, optval, optlen);
00046 }
00047 
00048 int Socket::get_option(int level, int optname, void *optval, socklen_t *optlen) {
00049     return lwip_getsockopt(_sock_fd, level, optname, optval, optlen);
00050 }
00051 
00052 int Socket::select(struct timeval *timeout, bool read, bool write) {
00053     fd_set fdSet;
00054     FD_ZERO(&fdSet);
00055     FD_SET(_sock_fd, &fdSet);
00056     
00057     fd_set* readset  = (read ) ? (&fdSet) : (NULL);
00058     fd_set* writeset = (write) ? (&fdSet) : (NULL);
00059     
00060     int ret = lwip_select(FD_SETSIZE, readset, writeset, NULL, timeout);
00061     return (ret <= 0 || !FD_ISSET(_sock_fd, &fdSet)) ? (-1) : (0);
00062 }
00063 
00064 int Socket::wait_readable(TimeInterval& timeout) {
00065     return select(&timeout._time, true, false);
00066 }
00067 
00068 int Socket::wait_writable(TimeInterval& timeout) {
00069     return select(&timeout._time, false, true);
00070 }
00071 
00072 int Socket::close(bool shutdown) {
00073     if (_sock_fd < 0)
00074         return -1;
00075     
00076     if (shutdown)
00077         lwip_shutdown(_sock_fd, SHUT_RDWR);
00078     lwip_close(_sock_fd);
00079     _sock_fd = -1;
00080     
00081     return 0;
00082 }
00083 
00084 Socket::~Socket() {
00085     close(); //Don't want to leak
00086 }
00087 
00088 TimeInterval::TimeInterval(unsigned int ms) {
00089     _time.tv_sec = ms / 1000;
00090     _time.tv_usec = (ms - (_time.tv_sec * 1000)) * 1000;
00091 }