1 /* @(#)get_myaddress.c 2.1 88/07/29 4.0 RPCSRC */
2 /*
3 * Copyright (c) 2010, Oracle America, Inc.
4 *
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 *
18 * * Neither the name of the "Oracle America, Inc." nor the names of
19 * its contributors may be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
23 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
25 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
28 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
29 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34 #if !defined(lint) && defined(SCCSIDS)
35 static char sccsid[] = "@(#)get_myaddress.c 1.4 87/08/11 Copyr 1984 Sun Micro";
36 #endif
37
38 /*
39 * get_myaddress.c
40 *
41 * Get client's IP address via ioctl. This avoids using the yellowpages.
42 */
43
44 #ifdef GSSAPI_KRB5
45 #include <string.h>
46 #include <gssrpc/types.h>
47 #include <gssrpc/rpc.h>
48 #include <gssrpc/pmap_prot.h>
49 #include <sys/socket.h>
50 #include <netinet/in.h>
51 #include <krb5.h>
52 /*
53 * don't use gethostbyname, which would invoke yellow pages
54 */
55 int
get_myaddress(struct sockaddr_in * addr)56 get_myaddress(struct sockaddr_in *addr)
57 {
58 memset(addr, 0, sizeof(*addr));
59 addr->sin_family = AF_INET;
60 addr->sin_port = htons(PMAPPORT);
61 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
62 return (0);
63 }
64 #else /* !GSSAPI_KRB5 */
65 #include <gssrpc/types.h>
66 #include <gssrpc/pmap_prot.h>
67 #include <sys/socket.h>
68 #if defined(sun)
69 #include <sys/sockio.h>
70 #endif
71 #include <stdio.h>
72 #ifdef OSF1
73 #include <net/route.h>
74 #include <sys/mbuf.h>
75 #endif
76 #include <net/if.h>
77 #include <sys/ioctl.h>
78 #include <arpa/inet.h>
79 #include <netinet/in.h>
80
81 /*
82 * don't use gethostbyname, which would invoke yellow pages
83 */
get_myaddress(struct sockaddr_in * addr)84 get_myaddress(struct sockaddr_in *addr)
85 {
86 int s;
87 char buf[256 * sizeof (struct ifreq)];
88 struct ifconf ifc;
89 struct ifreq ifreq, *ifr;
90 int len;
91
92 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
93 perror("get_myaddress: socket");
94 exit(1);
95 }
96 set_cloexec_fd(s);
97 ifc.ifc_len = sizeof (buf);
98 ifc.ifc_buf = buf;
99 if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) {
100 perror("get_myaddress: ioctl (get interface configuration)");
101 exit(1);
102 }
103 ifr = ifc.ifc_req;
104 for (len = ifc.ifc_len; len; len -= sizeof ifreq) {
105 ifreq = *ifr;
106 if (ioctl(s, SIOCGIFFLAGS, (char *)&ifreq) < 0) {
107 perror("get_myaddress: ioctl");
108 exit(1);
109 }
110 if ((ifreq.ifr_flags & IFF_UP) &&
111 ifr->ifr_addr.sa_family == AF_INET) {
112 *addr = *((struct sockaddr_in *)&ifr->ifr_addr);
113 addr->sin_port = htons(PMAPPORT);
114 break;
115 }
116 ifr++;
117 }
118 (void) close(s);
119 }
120 #endif /* !GSSAPI_KRB5 */
121