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: @(#)get_myaddress.c 1.4 87/08/11 Copyr 1984 Sun Micro";*/ 55/*static char *sccsid = "from: @(#)get_myaddress.c 2.1 88/07/29 4.0 RPCSRC";*/ 56static char *rcsid = "$Id: get_myaddress.c,v 1.4 2002/02/19 20:36:23 epeyton Exp $"; 57#endif 58 59/* 60 * get_myaddress.c 61 * 62 * Get client's IP address via ioctl. This avoids using the yellowpages. 63 * Copyright (C) 1984, Sun Microsystems, Inc. 64 * 65 * Re-worked for 4.4BSD by Marc Majka at Apple. 66 */ 67 68#include <rpc/types.h> 69#include <rpc/xdr.h> 70#include <rpc/pmap_prot.h> 71#include <sys/socket.h> 72#include <stdio.h> 73#include <string.h> 74#include <unistd.h> 75#include <net/if.h> 76#include <sys/ioctl.h> 77#include <netinet/in.h> 78#include <arpa/inet.h> 79 80int 81get_myaddress(struct sockaddr_in *addr) 82{ 83 struct ifconf ifc; 84 struct ifreq *ifr; 85 char buf[BUFSIZ]; 86 int offset, x, addrlen, s; 87 88 bzero(addr, sizeof(struct sockaddr_in)); 89 addr->sin_family = AF_INET; 90 91 s = socket(AF_INET, SOCK_DGRAM, 0); 92 93 if (s < 0) 94 { 95 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 96 return 0; 97 } 98 99 ifc.ifc_len = sizeof(buf); 100 ifc.ifc_buf = buf; 101 102 if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) 103 { 104 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 105 close(s); 106 return 0; 107 } 108 109 addrlen = sizeof(struct ifreq) - IFNAMSIZ; 110 offset = 0; 111 112 while (offset <= ifc.ifc_len) 113 { 114 ifr = (struct ifreq *)(ifc.ifc_buf + offset); 115 offset += IFNAMSIZ; 116 if (ifr->ifr_addr.sa_len > addrlen) offset += ifr->ifr_addr.sa_len; 117 else offset += addrlen; 118 119 if (ifr->ifr_addr.sa_family != AF_INET) continue; 120 if (ioctl(s, SIOCGIFFLAGS, ifr) < 0) continue; 121 122 x = ((struct sockaddr_in *)&(ifr->ifr_addr))->sin_addr.s_addr; 123 if 124 ( 125 (ifr->ifr_flags & IFF_UP) && 126 (!(ifr->ifr_flags & IFF_LOOPBACK)) && 127 (x != 0) && 128 (x != -1) 129 ) 130 { 131 addr->sin_addr.s_addr = x; 132 close(s); 133 return 0; 134 } 135 } 136 137 close(s); 138 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 139 return 0; 140} 141