1 static char sccsid
[] = "@(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC 1.8 88/02/08 SMI";
3 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
4 * unrestricted use provided that this legend is included on all tape
5 * media and as a part of the software program in whole or part. Users
6 * may copy or modify Sun RPC without charge, but are not authorized
7 * to license or distribute it to anyone else except as part of a product or
8 * program developed by the user.
10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 * Sun RPC is provided with no support and without any obligation on the
15 * part of Sun Microsystems, Inc. to assist in its use, correction,
16 * modification or enhancement.
18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
20 * OR ANY PART THEREOF.
22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
23 * or profits or other special, indirect and consequential damages, even if
24 * Sun has been advised of the possibility of such damages.
26 * Sun Microsystems, Inc.
28 * Mountain View, California 94043
32 * Copyright (c) 1987 by Sun Microsystems, Inc.
35 #include <sys/types.h>
36 #include <sys/errno.h>
37 #include <sys/socket.h>
38 #include <netinet/in.h>
41 * Bind a socket to a privileged IP port
45 struct sockaddr_in
*sin
;
49 struct sockaddr_in myaddr
;
56 #define ENDPORT (IPPORT_RESERVED - 1)
57 #define NPORTS (ENDPORT - STARTPORT + 1)
59 if (sin
== (struct sockaddr_in
*)0) {
61 bzero(sin
, sizeof (*sin
));
62 sin
->sin_family
= AF_INET
;
63 } else if (sin
->sin_family
!= AF_INET
) {
64 __set_errno (EPFNOSUPPORT
);
68 port
= (getpid() % NPORTS
) + STARTPORT
;
71 __set_errno (EADDRINUSE
);
72 for (i
= 0; i
< NPORTS
&& res
< 0 && errno
== EADDRINUSE
; i
++) {
73 sin
->sin_port
= htons(port
++);
77 res
= bind(sd
, sin
, sizeof(struct sockaddr_in
));