1 /* @(#)get_myaddress.c 2.1 88/07/29 4.0 RPCSRC */
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28 * Mountain View, California 94043
30 #if !defined(lint) && defined(SCCSIDS)
31 static char sccsid
[] = "@(#)get_myaddress.c 1.4 87/08/11 Copyr 1984 Sun Micro";
37 * Get client's IP address via ioctl. This avoids using the yellowpages.
38 * Copyright (C) 1984, Sun Microsystems, Inc.
41 #include <rpc/types.h>
43 #include <rpc/pmap_prot.h>
44 #include <sys/socket.h>
50 #include <sys/ioctl.h>
51 /* Order of following two #includes reversed by roland@gnu */
52 #include <netinet/in.h>
53 #include <arpa/inet.h>
56 * don't use gethostbyname, which would invoke yellow pages
58 * Avoid loopback interfaces. We return information from a loopback
59 * interface only if there are no other possible interfaces.
62 get_myaddress (struct sockaddr_in
*addr
)
66 if (getifaddrs (&ifa
) != 0)
68 perror ("get_myaddress: getifaddrs");
79 if ((run
->ifa_flags
& IFF_UP
) && run
->ifa_addr
->sa_family
== AF_INET
80 && (!(run
->ifa_flags
& IFF_LOOPBACK
)
81 || (loopback
== 1 && (run
->ifa_flags
& IFF_LOOPBACK
))))
83 *addr
= *((struct sockaddr_in
*) run
->ifa_addr
);
84 addr
->sin_port
= htons (PMAPPORT
);
99 /* The function is horribly specified. It does not return any error
100 if no interface is up. Probably this won't happen (at least
101 loopback is there) but still... */