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/*
* 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.
*/
#define __FORCE_GLIBC
#include <features.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
/*
* Bind a socket to a privileged IP port
*/
int
bindresvport (int sd, struct sockaddr_in *sin)
{
int res;
static short port;
struct sockaddr_in myaddr;
int i;
#define STARTPORT 600
#define ENDPORT (IPPORT_RESERVED - 1)
#define NPORTS (ENDPORT - STARTPORT + 1)
if (sin == (struct sockaddr_in *) 0)
{
sin = &myaddr;
memset (sin, 0, sizeof (*sin));
sin->sin_family = AF_INET;
}
else if (sin->sin_family != AF_INET)
{
__set_errno (EPFNOSUPPORT);
return -1;
}
if (port == 0)
{
port = (getpid () % NPORTS) + STARTPORT;
}
res = -1;
__set_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;
}
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