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tcpclient.cpp
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tcpclient.cpp
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/*
* This file is part of btcontrol
*
* Copyright (C) Christian Ferbar
*
* btcontrol is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* btcontrol is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with btcontrol. If not, see <http://www.gnu.org/licenses/>.
*
*
* client - thread - part (für jeden client ein thread)
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <string.h>
#include <assert.h>
#include <stdexcept>
// für setsockopt
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <unistd.h>
#include <errno.h>
#include "utils.h"
#include "server.h"
#include "tcpclient.h"
int TCPClient::numClients=0;
int cfg_tcpTimeout=100000;
void TCPClient::prepareMessage()
{
int flag = 1;
setsockopt(this->so, IPPROTO_TCP, TCP_CORK, (char *)&flag, sizeof(flag) ); // prepare message, stopsel rein
}
void TCPClient::flushMessage()
{
int flag=0;
setsockopt(this->so, IPPROTO_TCP, TCP_CORK, (char *)&flag, sizeof(flag) ); // message fertig, senden
}
/**
* wartet bis daten daherkommen, macht exception wenn keine innerhalb von timeout gekommen sind
*/
void TCPClient::readSelect()
{
struct timeval timeout;
fd_set set;
timeout.tv_sec=cfg_tcpTimeout; timeout.tv_usec=0;
FD_ZERO(&set); FD_SET(this->so,&set);
int rc;
if((rc=select(this->so+1, &set, NULL, NULL, &timeout)) <= 0) {
if(rc != 0) {
throw std::runtime_error("error select");
}
printf("ClientThread::readSelect error in select(%d) %s\n", this->so, strerror(errno));
throw std::runtime_error("timeout reading cmd");
}
}
/**
* destruktor
*/
TCPClient::~TCPClient()
{
close(this->so);
}