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/*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Jabber
* Copyright (C) 1998-1999 The Jabber Team http://jabber.org/
*/
#include "libxode.h"
/* socket.c
*
* Simple wrapper to make socket creation easy.
* type = NETSOCKET_SERVER is local listening socket
* type = NETSOCKET_CLIENT is connection socket
* type = NETSOCKET_UDP
*/
int make_netsocket(u_short port, char *host, int type)
{
int s, flag = 1;
struct sockaddr_in sa;
struct in_addr *saddr;
int socket_type;
/* is this a UDP socket or a TCP socket? */
socket_type = (type == NETSOCKET_UDP)?SOCK_DGRAM:SOCK_STREAM;
bzero((void *)&sa,sizeof(struct sockaddr_in));
if((s = socket(AF_INET,socket_type,0)) < 0)
return(-1);
if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char*)&flag, sizeof(flag)) < 0)
return(-1);
saddr = make_addr(host);
if(saddr == NULL)
return(-1);
sa.sin_family = AF_INET;
sa.sin_port = htons(port);
if(type == NETSOCKET_SERVER)
{
/* bind to specific address if specified */
if(host != NULL)
sa.sin_addr.s_addr = saddr->s_addr;
if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)
{
close(s);
return(-1);
}
}
if(type == NETSOCKET_CLIENT)
{
sa.sin_addr.s_addr = saddr->s_addr;
if(connect(s,(struct sockaddr*)&sa,sizeof sa) < 0)
{
close(s);
return(-1);
}
}
if(type == NETSOCKET_UDP)
{
/* bind to all addresses for now */
if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)
{
close(s);
return(-1);
}
/* specify default recipient for read/write */
sa.sin_addr.s_addr = saddr->s_addr;
if(connect(s,(struct sockaddr*)&sa,sizeof sa) < 0)
{
close(s);
return(-1);
}
}
return(s);
}
struct in_addr *make_addr(char *host)
{
struct hostent *hp;
static struct in_addr addr;
char myname[MAXHOSTNAMELEN + 1];
if(host == NULL || strlen(host) == 0)
{
gethostname(myname,MAXHOSTNAMELEN);
hp = gethostbyname(myname);
if(hp != NULL)
{
return (struct in_addr *) *hp->h_addr_list;
}
}else{
addr.s_addr = inet_addr(host);
if(addr.s_addr != -1)
{
return &addr;
}
hp = gethostbyname(host);
if(hp != NULL)
{
return (struct in_addr *) *hp->h_addr_list;
}
}
return NULL;
}
/* Sets a file descriptor to close on exec. "flag" is 1 to close on exec, 0 to
* leave open across exec.
* -- EJB 7/31/2000
*/
int set_fd_close_on_exec(int fd, int flag)
{
int oldflags = fcntl(fd,F_GETFL);
int newflags;
if(flag)
newflags = oldflags | FD_CLOEXEC;
else
newflags = oldflags & (~FD_CLOEXEC);
if(newflags==oldflags)
return 0;
return fcntl(fd,F_SETFL,(long)newflags);
}
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