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dba29224 KM |
1 | /* @(#)get_myaddress.c 2.1 88/07/29 4.0 RPCSRC */ |
2 | /* | |
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. | |
9 | * | |
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. | |
13 | * | |
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. | |
17 | * | |
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. | |
21 | * | |
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. | |
25 | * | |
26 | * Sun Microsystems, Inc. | |
27 | * 2550 Garcia Avenue | |
28 | * Mountain View, California 94043 | |
29 | */ | |
30 | #if !defined(lint) && defined(SCCSIDS) | |
31 | static char sccsid[] = "@(#)get_myaddress.c 1.4 87/08/11 Copyr 1984 Sun Micro"; | |
32 | #endif | |
33 | ||
34 | /* | |
35 | * get_myaddress.c | |
36 | * | |
37 | * Get client's IP address via ioctl. This avoids using the yellowpages. | |
38 | * Copyright (C) 1984, Sun Microsystems, Inc. | |
39 | */ | |
40 | ||
41 | #include <rpc/types.h> | |
42 | #include <rpc/pmap_prot.h> | |
43 | #include <sys/socket.h> | |
44 | #include <stdio.h> | |
45 | #include <net/if.h> | |
46 | #include <sys/ioctl.h> | |
47 | #include <arpa/inet.h> | |
48 | #include <netinet/in.h> | |
49 | ||
50 | /* | |
51 | * don't use gethostbyname, which would invoke yellow pages | |
52 | */ | |
53 | get_myaddress(addr) | |
54 | struct sockaddr_in *addr; | |
55 | { | |
56 | int s; | |
57 | char buf[BUFSIZ]; | |
58 | struct ifconf ifc; | |
59 | struct ifreq ifreq, *ifr; | |
60 | int len; | |
61 | ||
62 | if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { | |
63 | perror("get_myaddress: socket"); | |
64 | exit(1); | |
65 | } | |
66 | ifc.ifc_len = sizeof (buf); | |
67 | ifc.ifc_buf = buf; | |
68 | if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) { | |
69 | perror("get_myaddress: ioctl (get interface configuration)"); | |
70 | exit(1); | |
71 | } | |
72 | ifr = ifc.ifc_req; | |
73 | for (len = ifc.ifc_len; len; len -= sizeof ifreq) { | |
74 | ifreq = *ifr; | |
75 | if (ioctl(s, SIOCGIFFLAGS, (char *)&ifreq) < 0) { | |
76 | perror("get_myaddress: ioctl"); | |
77 | exit(1); | |
78 | } | |
79 | if ((ifreq.ifr_flags & IFF_UP) && | |
80 | ifr->ifr_addr.sa_family == AF_INET) { | |
81 | *addr = *((struct sockaddr_in *)&ifr->ifr_addr); | |
82 | addr->sin_port = htons(PMAPPORT); | |
83 | break; | |
84 | } | |
85 | ifr++; | |
86 | } | |
87 | (void) close(s); | |
88 | } |