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

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/* Copyright (C) 2012 mbed.org, MIT License
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute,
* sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "TCPSocketConnection.h"
#include <cstring>
using std::memset;
using std::memcpy;
TCPSocketConnection::TCPSocketConnection() :
_is_connected(false) {
}
int TCPSocketConnection::connect(const char* host, const int port) {
if (init_socket(SOCK_STREAM) < 0)
return -1;
if (set_address(host, port) != 0)
return -1;
if (lwip_connect(_sock_fd, (const struct sockaddr *) &_remoteHost, sizeof(_remoteHost)) < 0) {
close();
return -1;
}
_is_connected = true;
return 0;
}
bool TCPSocketConnection::is_connected(void) {
return _is_connected;
}
int TCPSocketConnection::send(char* data, int length) {
if ((_sock_fd < 0) || !_is_connected)
return -1;
if (!_blocking) {
TimeInterval timeout(_timeout);
if (wait_writable(timeout) != 0)
return -1;
}
int n = lwip_send(_sock_fd, data, length, 0);
_is_connected = (n != 0);
return n;
}
// -1 if unsuccessful, else number of bytes written
int TCPSocketConnection::send_all(char* data, int length) {
if ((_sock_fd < 0) || !_is_connected)
return -1;
int writtenLen = 0;
TimeInterval timeout(_timeout);
while (writtenLen < length) {
if (!_blocking) {
// Wait for socket to be writeable
if (wait_writable(timeout) != 0)
return writtenLen;
}
int ret = lwip_send(_sock_fd, data + writtenLen, length - writtenLen, 0);
if (ret > 0) {
writtenLen += ret;
continue;
} else if (ret == 0) {
_is_connected = false;
return writtenLen;
} else {
return -1; //Connnection error
}
}
return writtenLen;
}
int TCPSocketConnection::receive(char* data, int length) {
if ((_sock_fd < 0) || !_is_connected)
return -1;
if (!_blocking) {
TimeInterval timeout(_timeout);
if (wait_readable(timeout) != 0)
return -1;
}
int n = lwip_recv(_sock_fd, data, length, 0);
_is_connected = (n != 0);
return n;
}
// -1 if unsuccessful, else number of bytes received
int TCPSocketConnection::receive_all(char* data, int length) {
if ((_sock_fd < 0) || !_is_connected)
return -1;
int readLen = 0;
TimeInterval timeout(_timeout);
while (readLen < length) {
if (!_blocking) {
//Wait for socket to be readable
if (wait_readable(timeout) != 0)
return readLen;
}
int ret = lwip_recv(_sock_fd, data + readLen, length - readLen, 0);
if (ret > 0) {
readLen += ret;
} else if (ret == 0) {
_is_connected = false;
return readLen;
} else {
return -1; //Connnection error
}
}
return readLen;
}