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