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/*
Copyright (C) 2000 Stefan Westerfeld
[email protected]
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "tcpconnection.h"
#include "dispatcher.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#define queue cqueue
#include <netdb.h>
#undef queue
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <sys/un.h>
#include <errno.h>
#include "debug.h"
#include <stdlib.h>
#include <string.h>
using namespace std;
using namespace Arts;
static struct sockaddr_in *parse_tcp_url(const char *url)
{
static struct sockaddr_in addr;
char *work = strdup(url);
char *type = strtok(work,":");
if(type == 0 || strcmp(type,"tcp") != 0) {
free(work);
return 0;
}
char *host = strtok(NULL,":");
if(host == 0) {
free(work);
return 0;
}
char *port = strtok(NULL,":\n");
if(port == 0) {
free(work);
return 0;
}
long portno = atol(port);
if(portno < 1 || portno > 65535) {
free(work);
return 0;
}
struct hostent *server = gethostbyname(host);
if(server == 0)
{
arts_warning("parse_tcp_url: unknown host '%s'",host);
free(work);
return 0;
}
memset((void *) &addr, '\0', sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = *(u_long *)server->h_addr;
addr.sin_port = htons(portno);
free(work);
return &addr;
}
static int tcp_connect(const char *url)
{
struct sockaddr_in *remote_addr = parse_tcp_url(url);
if(remote_addr == 0)
{
arts_warning("tcp_connect: couldn't parse url %s",url);
return -1;
}
int my_socket = socket(AF_INET,SOCK_STREAM,0);
if(my_socket < 0)
{
arts_warning("tcp_connect: unable to open socket for read");
return -1;
}
struct linger lin;
lin.l_onoff=1; /* block a closing socket for 1 second */
lin.l_linger=100; /* if data is waiting to be sent */
if ( setsockopt( my_socket, SOL_SOCKET, SO_LINGER,
(char*)&lin, sizeof(struct linger) ) < 0 )
{
arts_warning("tcp_connect: unable to set socket linger value to %d",
lin.l_linger);
close(my_socket);
return -1;
}
#ifdef TCP_NODELAY
// enable TCP sending without nagle algorithm - this sends out requests
// faster, because they are not queued in the hope that more data will
// need to be sent soon
int on = 1;
if(setsockopt(my_socket, IPPROTO_TCP, TCP_NODELAY,
(char *)&on, sizeof(on)) < 0)
{
arts_debug("couldn't set TCP_NODELAY on socket %d\n", my_socket);
}
#endif
int rc;
rc=connect(my_socket,(struct sockaddr *)remote_addr, sizeof(*remote_addr));
if(rc != 0)
{
arts_warning("tcp_connect: can't connect to server (%s)", url);
close(my_socket);
return -1;
}
return my_socket;
}
TCPConnection::TCPConnection(const string& url)
{
fd = tcp_connect(url.c_str());
_broken = (fd == -1);
if(!_broken)
{
Dispatcher::the()->ioManager()->watchFD(fd,
IOType::read|IOType::except|IOType::reentrant,this);
initReceive();
}
}
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