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1/*
2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7 * Reserved. This file contains Original Code and/or Modifications of
8 * Original Code as defined in and that are subject to the Apple Public
9 * Source License Version 1.1 (the "License"). You may not use this file
10 * except in compliance with the License. Please obtain a copy of the
11 * License at http://www.apple.com/publicsource and read it before using
12 * this file.
13 *
14 * The Original Code and all software distributed under the License are
15 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the
19 * License for the specific language governing rights and limitations
20 * under the License.
21 *
22 * @APPLE_LICENSE_HEADER_END@
23 */
24/*
25 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
26 * unrestricted use provided that this legend is included on all tape
27 * media and as a part of the software program in whole or part. Users
28 * may copy or modify Sun RPC without charge, but are not authorized
29 * to license or distribute it to anyone else except as part of a product or
30 * program developed by the user.
31 *
32 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
33 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
34 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
35 *
36 * Sun RPC is provided with no support and without any obligation on the
37 * part of Sun Microsystems, Inc. to assist in its use, correction,
38 * modification or enhancement.
39 *
40 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
41 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
42 * OR ANY PART THEREOF.
43 *
44 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
45 * or profits or other special, indirect and consequential damages, even if
46 * Sun has been advised of the possibility of such damages.
47 *
48 * Sun Microsystems, Inc.
49 * 2550 Garcia Avenue
50 * Mountain View, California 94043
51 */
52
53#if defined(LIBC_SCCS) && !defined(lint)
54/*static char *sccsid = "from: @(#)bindresvport.c 1.8 88/02/08 SMI";*/
55/*static char *sccsid = "from: @(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC";*/
56static char *rcsid = "$Id: bindresvport.c,v 1.2 1999/10/14 21:56:52 wsanchez Exp $";
57#endif
58
59/*
60 * Copyright (c) 1987 by Sun Microsystems, Inc.
61 */
62
63#include <sys/types.h>
64#include <sys/errno.h>
65#include <sys/socket.h>
66#include <netinet/in.h>
67
68/*
69 * Bind a socket to a privileged IP port
70 */
71bindresvport(sd, sin)
72 int sd;
73 struct sockaddr_in *sin;
74{
75 int res;
76 static short port;
77 struct sockaddr_in myaddr;
78 extern int errno;
79 int i;
80
81#define STARTPORT 600
82#define ENDPORT (IPPORT_RESERVED - 1)
83#define NPORTS (ENDPORT - STARTPORT + 1)
84
85 if (sin == (struct sockaddr_in *)0) {
86 sin = &myaddr;
87 bzero(sin, sizeof (*sin));
88 sin->sin_family = AF_INET;
89 } else if (sin->sin_family != AF_INET) {
90 errno = EPFNOSUPPORT;
91 return (-1);
92 }
93 if (port == 0) {
94 port = (getpid() % NPORTS) + STARTPORT;
95 }
96 res = -1;
97 errno = EADDRINUSE;
98 for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; i++) {
99 sin->sin_port = htons(port++);
100 if (port > ENDPORT) {
101 port = STARTPORT;
102 }
103 res = bind(sd,
104 (struct sockaddr *)sin, sizeof(struct sockaddr_in));
105 }
106 return (res);
107}