80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
|
static char sccsid[] = "@(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC 1.8 88/02/08 SMI";
|
||
|
|
/*
|
||
|
|
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
|
||
|
|
* unrestricted use provided that this legend is included on all tape
|
||
|
|
* media and as a part of the software program in whole or part. Users
|
||
|
|
* may copy or modify Sun RPC without charge, but are not authorized
|
||
|
|
* to license or distribute it to anyone else except as part of a product or
|
||
|
|
* program developed by the user.
|
||
|
|
*
|
||
|
|
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
|
||
|
|
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
|
||
|
|
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
|
||
|
|
*
|
||
|
|
* Sun RPC is provided with no support and without any obligation on the
|
||
|
|
* part of Sun Microsystems, Inc. to assist in its use, correction,
|
||
|
|
* modification or enhancement.
|
||
|
|
*
|
||
|
|
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
|
||
|
|
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
|
||
|
|
* OR ANY PART THEREOF.
|
||
|
|
*
|
||
|
|
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
|
||
|
|
* or profits or other special, indirect and consequential damages, even if
|
||
|
|
* Sun has been advised of the possibility of such damages.
|
||
|
|
*
|
||
|
|
* Sun Microsystems, Inc.
|
||
|
|
* 2550 Garcia Avenue
|
||
|
|
* Mountain View, California 94043
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright (c) 1987 by Sun Microsystems, Inc.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/errno.h>
|
||
|
|
#include <sys/socket.h>
|
||
|
|
#include <netinet/in.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Bind a socket to a privileged IP port
|
||
|
|
*/
|
||
|
|
bindresvport(sd, sin)
|
||
|
|
int sd;
|
||
|
|
struct sockaddr_in *sin;
|
||
|
|
{
|
||
|
|
int res;
|
||
|
|
static short port;
|
||
|
|
struct sockaddr_in myaddr;
|
||
|
|
extern int errno;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
#define STARTPORT 600
|
||
|
|
#define ENDPORT (IPPORT_RESERVED - 1)
|
||
|
|
#define NPORTS (ENDPORT - STARTPORT + 1)
|
||
|
|
|
||
|
|
if (sin == (struct sockaddr_in *)0) {
|
||
|
|
sin = &myaddr;
|
||
|
|
bzero(sin, sizeof (*sin));
|
||
|
|
sin->sin_family = AF_INET;
|
||
|
|
} else if (sin->sin_family != AF_INET) {
|
||
|
|
errno = EPFNOSUPPORT;
|
||
|
|
return (-1);
|
||
|
|
}
|
||
|
|
if (port == 0) {
|
||
|
|
port = (getpid() % NPORTS) + STARTPORT;
|
||
|
|
}
|
||
|
|
res = -1;
|
||
|
|
errno = EADDRINUSE;
|
||
|
|
for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; i++) {
|
||
|
|
sin->sin_port = htons(port++);
|
||
|
|
if (port > ENDPORT) {
|
||
|
|
port = STARTPORT;
|
||
|
|
}
|
||
|
|
res = bind(sd,
|
||
|
|
(struct sockaddr *)sin, sizeof(struct sockaddr_in));
|
||
|
|
}
|
||
|
|
return (res);
|
||
|
|
}
|