A S / Socket

Disable UDP + DHCP + DNS to reduce the amount of memory usage

Dependents:   EthernetInterface

Fork of Socket by mbed official

Socket.cpp@17:c5089d058eab, 2013-05-14 (annotated)

Committer:
emilmont
Date:
Tue May 14 09:48:07 2013 +0000
Revision:
17:c5089d058eab
Parent:
16:2d471deff212 
Not shutting down the socket, before closing it, is not robust in lwIP

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 16:2d471deff212 1 /* Copyright (C) 2012 mbed.org, MIT License
emilmont 16:2d471deff212 2 *
emilmont 16:2d471deff212 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
emilmont 16:2d471deff212 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
emilmont 16:2d471deff212 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
emilmont 16:2d471deff212 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
emilmont 16:2d471deff212 7 * furnished to do so, subject to the following conditions:
emilmont 16:2d471deff212 8 *
emilmont 16:2d471deff212 9 * The above copyright notice and this permission notice shall be included in all copies or
emilmont 16:2d471deff212 10 * substantial portions of the Software.
emilmont 16:2d471deff212 11 *
emilmont 16:2d471deff212 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
emilmont 16:2d471deff212 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
emilmont 16:2d471deff212 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
emilmont 16:2d471deff212 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emilmont 16:2d471deff212 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
emilmont 16:2d471deff212 17 */
emilmont 16:2d471deff212 18 #include "Socket/Socket.h"
emilmont 16:2d471deff212 19 #include <cstring>
emilmont 16:2d471deff212 20
emilmont 16:2d471deff212 21 using std::memset;
emilmont 16:2d471deff212 22
emilmont 16:2d471deff212 23 Socket::Socket() : _sock_fd(-1), _blocking(true), _timeout(1500) {
emilmont 16:2d471deff212 24
emilmont 16:2d471deff212 25 }
emilmont 16:2d471deff212 26
emilmont 16:2d471deff212 27 void Socket::set_blocking(bool blocking, unsigned int timeout) {
emilmont 16:2d471deff212 28 _blocking = blocking;
emilmont 16:2d471deff212 29 _timeout = timeout;
emilmont 16:2d471deff212 30 }
emilmont 16:2d471deff212 31
emilmont 16:2d471deff212 32 int Socket::init_socket(int type) {
emilmont 16:2d471deff212 33 if (_sock_fd != -1)
emilmont 16:2d471deff212 34 return -1;
emilmont 16:2d471deff212 35
emilmont 16:2d471deff212 36 int fd = lwip_socket(AF_INET, type, 0);
emilmont 16:2d471deff212 37 if (fd < 0)
emilmont 16:2d471deff212 38 return -1;
emilmont 16:2d471deff212 39
emilmont 16:2d471deff212 40 _sock_fd = fd;
emilmont 16:2d471deff212 41 return 0;
emilmont 16:2d471deff212 42 }
emilmont 16:2d471deff212 43
emilmont 16:2d471deff212 44 int Socket::set_option(int level, int optname, const void *optval, socklen_t optlen) {
emilmont 16:2d471deff212 45 return lwip_setsockopt(_sock_fd, level, optname, optval, optlen);
emilmont 16:2d471deff212 46 }
emilmont 16:2d471deff212 47
emilmont 16:2d471deff212 48 int Socket::get_option(int level, int optname, void *optval, socklen_t *optlen) {
emilmont 16:2d471deff212 49 return lwip_getsockopt(_sock_fd, level, optname, optval, optlen);
emilmont 16:2d471deff212 50 }
emilmont 16:2d471deff212 51
emilmont 16:2d471deff212 52 int Socket::select(struct timeval *timeout, bool read, bool write) {
emilmont 16:2d471deff212 53 fd_set fdSet;
emilmont 16:2d471deff212 54 FD_ZERO(&fdSet);
emilmont 16:2d471deff212 55 FD_SET(_sock_fd, &fdSet);
emilmont 16:2d471deff212 56
emilmont 16:2d471deff212 57 fd_set* readset = (read ) ? (&fdSet) : (NULL);
emilmont 16:2d471deff212 58 fd_set* writeset = (write) ? (&fdSet) : (NULL);
emilmont 16:2d471deff212 59
emilmont 16:2d471deff212 60 int ret = lwip_select(FD_SETSIZE, readset, writeset, NULL, timeout);
emilmont 16:2d471deff212 61 return (ret <= 0 || !FD_ISSET(_sock_fd, &fdSet)) ? (-1) : (0);
emilmont 16:2d471deff212 62 }
emilmont 16:2d471deff212 63
emilmont 16:2d471deff212 64 int Socket::wait_readable(TimeInterval& timeout) {
emilmont 16:2d471deff212 65 return select(&timeout._time, true, false);
emilmont 16:2d471deff212 66 }
emilmont 16:2d471deff212 67
emilmont 16:2d471deff212 68 int Socket::wait_writable(TimeInterval& timeout) {
emilmont 16:2d471deff212 69 return select(&timeout._time, false, true);
emilmont 16:2d471deff212 70 }
emilmont 16:2d471deff212 71
emilmont 17:c5089d058eab 72 int Socket::close(bool shutdown) {
emilmont 16:2d471deff212 73 if (_sock_fd < 0)
emilmont 16:2d471deff212 74 return -1;
emilmont 16:2d471deff212 75
emilmont 17:c5089d058eab 76 if (shutdown)
emilmont 17:c5089d058eab 77 lwip_shutdown(_sock_fd, SHUT_RDWR);
emilmont 16:2d471deff212 78 lwip_close(_sock_fd);
emilmont 16:2d471deff212 79 _sock_fd = -1;
emilmont 16:2d471deff212 80
emilmont 16:2d471deff212 81 return 0;
emilmont 16:2d471deff212 82 }
emilmont 16:2d471deff212 83
emilmont 16:2d471deff212 84 Socket::~Socket() {
emilmont 16:2d471deff212 85 close(); //Don't want to leak
emilmont 16:2d471deff212 86 }
emilmont 16:2d471deff212 87
emilmont 16:2d471deff212 88 TimeInterval::TimeInterval(unsigned int ms) {
emilmont 16:2d471deff212 89 _time.tv_sec = ms / 1000;
emilmont 16:2d471deff212 90 _time.tv_usec = (ms - (_time.tv_sec * 1000)) * 1000;
emilmont 16:2d471deff212 91 }