mbed official / Socket

mbed socket API

Dependents:   EthernetInterface EthernetInterface_RSF EthernetInterface EthernetInterface ... more

Deprecated

This is an mbed 2 sockets library. For mbed 5, network sockets have been revised to better support additional network stacks and thread safety here.

TCPSocketConnection.cpp@5:300e7ad2dc1d, 2012-07-26 (annotated)

Committer:
emilmont
Date:
Thu Jul 26 15:07:32 2012 +0000
Revision:
5:300e7ad2dc1d
Parent:
4:75988d748e4d
Child:
6:cd2e5559786d
Add Endpoint class and UDPPacket class

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 3:e6474399e057 1 /* Copyright (C) 2012 mbed.org, MIT License
emilmont 3:e6474399e057 2 *
emilmont 3:e6474399e057 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
emilmont 3:e6474399e057 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
emilmont 3:e6474399e057 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
emilmont 3:e6474399e057 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
emilmont 3:e6474399e057 7 * furnished to do so, subject to the following conditions:
emilmont 3:e6474399e057 8 *
emilmont 3:e6474399e057 9 * The above copyright notice and this permission notice shall be included in all copies or
emilmont 3:e6474399e057 10 * substantial portions of the Software.
emilmont 3:e6474399e057 11 *
emilmont 3:e6474399e057 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
emilmont 3:e6474399e057 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
emilmont 3:e6474399e057 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
emilmont 3:e6474399e057 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emilmont 3:e6474399e057 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
emilmont 3:e6474399e057 17 */
emilmont 3:e6474399e057 18 #include "TCPSocketConnection.h"
emilmont 3:e6474399e057 19 #include <cstring>
emilmont 3:e6474399e057 20
emilmont 3:e6474399e057 21 using std::memset;
emilmont 3:e6474399e057 22 using std::memcpy;
emilmont 3:e6474399e057 23
emilmont 3:e6474399e057 24 TCPSocketConnection::TCPSocketConnection() :
emilmont 3:e6474399e057 25 _closedByRemoteHost(false) {
emilmont 3:e6474399e057 26 }
emilmont 3:e6474399e057 27
emilmont 4:75988d748e4d 28 int TCPSocketConnection::connect(const char* host, const int port) {
emilmont 5:300e7ad2dc1d 29 if (init_socket(SOCK_STREAM) < 0)
emilmont 3:e6474399e057 30 return -1;
emilmont 3:e6474399e057 31
emilmont 5:300e7ad2dc1d 32 if (set_address(host, port) != 0)
emilmont 5:300e7ad2dc1d 33 return -1;
emilmont 3:e6474399e057 34
emilmont 3:e6474399e057 35 if (lwip_connect(_sock_fd, (const struct sockaddr *) &_remoteHost, sizeof(_remoteHost)) < 0) {
emilmont 3:e6474399e057 36 close();
emilmont 3:e6474399e057 37 return -1;
emilmont 3:e6474399e057 38 }
emilmont 3:e6474399e057 39
emilmont 3:e6474399e057 40 return 0;
emilmont 3:e6474399e057 41 }
emilmont 3:e6474399e057 42
emilmont 3:e6474399e057 43 int TCPSocketConnection::send(char* data, int length, int timeout) {
emilmont 3:e6474399e057 44 if ((_sock_fd < 0) || _closedByRemoteHost)
emilmont 3:e6474399e057 45 return -1;
emilmont 3:e6474399e057 46
emilmont 3:e6474399e057 47 set_timeout(timeout);
emilmont 3:e6474399e057 48 if (wait_writable() != 0)
emilmont 3:e6474399e057 49 return -1;
emilmont 3:e6474399e057 50
emilmont 3:e6474399e057 51 int n = lwip_send(_sock_fd, data, length, 0);
emilmont 3:e6474399e057 52 _closedByRemoteHost = (n == 0);
emilmont 3:e6474399e057 53
emilmont 3:e6474399e057 54 return n;
emilmont 3:e6474399e057 55 }
emilmont 3:e6474399e057 56
emilmont 3:e6474399e057 57 // -1 if unsuccessful, else number of bytes written
emilmont 3:e6474399e057 58 int TCPSocketConnection::send_all(char* data, int length, int timeout) {
emilmont 3:e6474399e057 59 if ((_sock_fd < 0) || _closedByRemoteHost)
emilmont 3:e6474399e057 60 return -1;
emilmont 3:e6474399e057 61
emilmont 3:e6474399e057 62 size_t writtenLen = 0;
emilmont 3:e6474399e057 63 set_timeout(timeout);
emilmont 3:e6474399e057 64 while (writtenLen < length) {
emilmont 3:e6474399e057 65 // Wait for socket to be writeable
emilmont 3:e6474399e057 66 if (wait_writable() != 0)
emilmont 3:e6474399e057 67 return writtenLen; //Timeout -- FIXME should we return -1 or writtenLength ?
emilmont 3:e6474399e057 68
emilmont 3:e6474399e057 69 int ret = lwip_send(_sock_fd, data + writtenLen, length - writtenLen, 0);
emilmont 3:e6474399e057 70 if (ret > 0) {
emilmont 3:e6474399e057 71 writtenLen += ret;
emilmont 3:e6474399e057 72 continue;
emilmont 3:e6474399e057 73 } else if (ret == 0) {
emilmont 3:e6474399e057 74 _closedByRemoteHost = true;
emilmont 3:e6474399e057 75 return writtenLen; //Connection was closed by remote host -- FIXME how do we signal that the connection was closed ?
emilmont 3:e6474399e057 76 } else {
emilmont 3:e6474399e057 77 return -1; //Connnection error
emilmont 3:e6474399e057 78 }
emilmont 3:e6474399e057 79 }
emilmont 3:e6474399e057 80
emilmont 3:e6474399e057 81 return writtenLen;
emilmont 3:e6474399e057 82 }
emilmont 3:e6474399e057 83
emilmont 3:e6474399e057 84 int TCPSocketConnection::receive(char* data, int length, int timeout) {
emilmont 3:e6474399e057 85 if ((_sock_fd < 0) || _closedByRemoteHost)
emilmont 3:e6474399e057 86 return -1;
emilmont 3:e6474399e057 87
emilmont 3:e6474399e057 88 set_timeout(timeout);
emilmont 3:e6474399e057 89 if (wait_readable() != 0)
emilmont 3:e6474399e057 90 return -1;
emilmont 3:e6474399e057 91
emilmont 3:e6474399e057 92 int n = lwip_recv(_sock_fd, data, length, 0);
emilmont 3:e6474399e057 93 _closedByRemoteHost = (n == 0);
emilmont 3:e6474399e057 94
emilmont 3:e6474399e057 95 return n;
emilmont 3:e6474399e057 96 }
emilmont 3:e6474399e057 97
emilmont 3:e6474399e057 98 // -1 if unsuccessful, else number of bytes received
emilmont 3:e6474399e057 99 int TCPSocketConnection::receive_all(char* data, int length, int timeout) {
emilmont 3:e6474399e057 100 if ((_sock_fd < 0) || _closedByRemoteHost)
emilmont 3:e6474399e057 101 return -1;
emilmont 3:e6474399e057 102
emilmont 3:e6474399e057 103 size_t readLen = 0;
emilmont 3:e6474399e057 104 set_timeout(timeout);
emilmont 3:e6474399e057 105 while (readLen < length) {
emilmont 3:e6474399e057 106 //Wait for socket to be readable
emilmont 3:e6474399e057 107 if (wait_readable() != 0)
emilmont 3:e6474399e057 108 return readLen; //Timeout -- FIXME should we return -1 or writtenLength ?
emilmont 3:e6474399e057 109
emilmont 3:e6474399e057 110 int ret = lwip_recv(_sock_fd, data + readLen, length - readLen, 0);
emilmont 3:e6474399e057 111 if (ret > 0) {
emilmont 3:e6474399e057 112 readLen += ret;
emilmont 3:e6474399e057 113 } else if (ret == 0) {
emilmont 3:e6474399e057 114 _closedByRemoteHost = true;
emilmont 3:e6474399e057 115 return readLen; //Connection was closed by remote host -- FIXME how do we signal that the connection was closed ?
emilmont 3:e6474399e057 116 } else {
emilmont 3:e6474399e057 117 return -1; //Connnection error
emilmont 3:e6474399e057 118 }
emilmont 3:e6474399e057 119 }
emilmont 3:e6474399e057 120 return readLen;
emilmont 3:e6474399e057 121 }
emilmont 3:e6474399e057 122
emilmont 3:e6474399e057 123 TCPSocketConnection::~TCPSocketConnection() {
emilmont 3:e6474399e057 124 close(); //Don't want to leak
emilmont 3:e6474399e057 125 }