]> git.saurik.com Git - apple/libinfo.git/blob - rpc.subproj/get_myaddress.c
Libinfo-391.tar.gz
[apple/libinfo.git] / rpc.subproj / get_myaddress.c
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";*/
56 static 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
80 int
81 get_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 }