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/* --------------------------------------------------------------------------
*
* License
*
* The contents of this file are subject to the Jabber Open Source License
* Version 1.0 (the "JOSL"). You may not copy or use this file, in either
* source code or executable form, except in compliance with the JOSL. You
* may obtain a copy of the JOSL at http://www.jabber.org/ or at
* http://www.opensource.org/.
*
* Software distributed under the JOSL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the JOSL
* for the specific language governing rights and limitations under the
* JOSL.
*
* Copyrights
*
* Portions created by or assigned to Jabber.com, Inc. are
* Copyright (c) 1999-2002 Jabber.com, Inc. All Rights Reserved. Contact
* information for Jabber.com, Inc. is available at http://www.jabber.com/.
*
* Portions Copyright (c) 1998-1999 Jeremie Miller.
*
* Acknowledgements
*
* Special thanks to the Jabber Open Source Contributors for their
* suggestions and support of Jabber.
*
* Alternatively, the contents of this file may be used under the terms of the
* GNU General Public License Version 2 or later (the "GPL"), in which case
* the provisions of the GPL are applicable instead of those above. If you
* wish to allow use of your version of this file only under the terms of the
* GPL and not to allow others to use your version of this file under the JOSL,
* indicate your decision by deleting the provisions above and replace them
* with the notice and other provisions required by the GPL. If you do not
* delete the provisions above, a recipient may use your version of this file
* under either the JOSL or the GPL.
*
*
* --------------------------------------------------------------------------*/
#include "lib.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 is a UDP connection socket
*/
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 && type != NETSOCKET_UDP)
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);
}
/* if specified, use a default recipient for read/write */
if (host != NULL && saddr != NULL) {
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)
{
#ifndef __MINGW32__
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);
#else
return 0;
#endif
}
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