tool/mbed/mbed-sdk/libraries/net/lwip/Socket/Socket.cpp

   1 /* Copyright (C) 2012 mbed.org, MIT License
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
   4  * and associated documentation files (the "Software"), to deal in the Software without restriction,
   5  * including without limitation the rights to use, copy, modify, merge, publish, distribute,
   6  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
   7  * furnished to do so, subject to the following conditions:
   8  *
   9  * The above copyright notice and this permission notice shall be included in all copies or
  10  * substantial portions of the Software.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
  13  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  14  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  15  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  16  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  17  */
  18 #include "Socket/Socket.h"
  19 #include <cstring>
  20
  21 using std::memset;
  22
  23 Socket::Socket() : _sock_fd(-1), _blocking(true), _timeout(1500) {
  24
  25 }
  26
  27 void Socket::set_blocking(bool blocking, unsigned int timeout) {
  28     _blocking = blocking;
  29     _timeout = timeout;
  30 }
  31
  32 int Socket::init_socket(int type) {
  33     if (_sock_fd != -1)
  34         return -1;
  35
  36     int fd = lwip_socket(AF_INET, type, 0);
  37     if (fd < 0)
  38         return -1;
  39
  40     _sock_fd = fd;
  41     return 0;
  42 }
  43
  44 int Socket::set_option(int level, int optname, const void *optval, socklen_t optlen) {
  45     return lwip_setsockopt(_sock_fd, level, optname, optval, optlen);
  46 }
  47
  48 int Socket::get_option(int level, int optname, void *optval, socklen_t *optlen) {
  49     return lwip_getsockopt(_sock_fd, level, optname, optval, optlen);
  50 }
  51
  52 int Socket::select(struct timeval *timeout, bool read, bool write) {
  53     fd_set fdSet;
  54     FD_ZERO(&fdSet);
  55     FD_SET(_sock_fd, &fdSet);
  56
  57     fd_set* readset  = (read ) ? (&fdSet) : (NULL);
  58     fd_set* writeset = (write) ? (&fdSet) : (NULL);
  59
  60     int ret = lwip_select(FD_SETSIZE, readset, writeset, NULL, timeout);
  61     return (ret <= 0 || !FD_ISSET(_sock_fd, &fdSet)) ? (-1) : (0);
  62 }
  63
  64 int Socket::wait_readable(TimeInterval& timeout) {
  65     return select(&timeout._time, true, false);
  66 }
  67
  68 int Socket::wait_writable(TimeInterval& timeout) {
  69     return select(&timeout._time, false, true);
  70 }
  71
  72 int Socket::close(bool shutdown) {
  73     if (_sock_fd < 0)
  74         return -1;
  75
  76     if (shutdown)
  77         lwip_shutdown(_sock_fd, SHUT_RDWR);
  78     lwip_close(_sock_fd);
  79     _sock_fd = -1;
  80
  81     return 0;
  82 }
  83
  84 Socket::~Socket() {
  85     close(); //Don't want to leak
  86 }
  87
  88 TimeInterval::TimeInterval(unsigned int ms) {
  89     _time.tv_sec = ms / 1000;
  90     _time.tv_usec = (ms - (_time.tv_sec * 1000)) * 1000;
  91 }