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";*/ 56/*from: OpenBSD: bindresvport.c,v 1.7 1996/07/30 16:25:47 downsj Exp */ 57static char *rcsid = "$FreeBSD: src/lib/libc/rpc/bindresvport.c,v 1.12 2000/01/26 09:02:42 shin Exp $"; 58#endif 59 60/* 61 * Copyright (c) 1987 by Sun Microsystems, Inc. 62 * 63 * Portions Copyright(C) 1996, Jason Downs. All rights reserved. 64 */ 65 66#include <string.h> 67#include <unistd.h> 68#include <sys/types.h> 69#include <sys/errno.h> 70#include <sys/socket.h> 71#include <netinet/in.h> 72 73/* 74 * Bind a socket to a privileged port for whatever protocol. 75 */ 76int 77bindresvport_sa(sd, sa) 78 int sd; 79 struct sockaddr *sa; 80{ 81 int old, error, af; 82 struct sockaddr_storage myaddr; 83 struct sockaddr_in *sin; 84 struct sockaddr_in6 *sin6; 85 int proto, portrange, portlow; 86 u_int16_t port; 87 u_int32_t salen; 88 89 if (sa == NULL) { 90 salen = sizeof(myaddr); 91 sa = (struct sockaddr *)&myaddr; 92 93 if (getsockname(sd, sa, &salen) == -1) 94 return -1; /* errno is correctly set */ 95 96 af = sa->sa_family; 97 memset(&myaddr, 0, salen); 98 } else 99 af = sa->sa_family; 100 101 if (af == AF_INET) { 102 proto = IPPROTO_IP; 103 portrange = IP_PORTRANGE; 104 portlow = IP_PORTRANGE_LOW; 105 sin = (struct sockaddr_in *)sa; 106 salen = sizeof(struct sockaddr_in); 107 port = sin->sin_port; 108 } else if (af == AF_INET6) { 109 proto = IPPROTO_IPV6; 110 portrange = IPV6_PORTRANGE; 111 portlow = IPV6_PORTRANGE_LOW; 112 sin6 = (struct sockaddr_in6 *)sa; 113 salen = sizeof(struct sockaddr_in6); 114 port = sin6->sin6_port; 115 } else { 116 errno = EPFNOSUPPORT; 117 return (-1); 118 } 119 sa->sa_family = af; 120 sa->sa_len = salen; 121 122 if (port == 0) { 123 u_int32_t oldlen = sizeof(old); 124 125 error = getsockopt(sd, proto, portrange, &old, &oldlen); 126 if (error < 0) 127 return (error); 128 129 error = setsockopt(sd, proto, portrange, &portlow, 130 sizeof(portlow)); 131 if (error < 0) 132 return (error); 133 } 134 135 error = bind(sd, sa, salen); 136 137 if (port == 0) { 138 int saved_errno = errno; 139 140 if (error) { 141 if (setsockopt(sd, proto, portrange, &old, 142 sizeof(old)) < 0) 143 errno = saved_errno; 144 return (error); 145 } 146 147 if (sa != (struct sockaddr *)&myaddr) { 148 /* Hmm, what did the kernel assign... */ 149 if (getsockname(sd, sa, &salen) < 0) 150 errno = saved_errno; 151 return (error); 152 } 153 } 154 return (error); 155} 156 157/* 158 * Bind a socket to a privileged IP port 159 */ 160int 161bindresvport(sd, sin) 162 int sd; 163 struct sockaddr_in *sin; 164{ 165 return bindresvport_sa(sd, (struct sockaddr *)sin); 166} 167