home *** CD-ROM | disk | FTP | other *** search
- /* @(#)get_myaddress.c 2.1 88/07/29 4.0 RPCSRC */
- /*
- * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
- * unrestricted use provided that this legend is included on all tape
- * media and as a part of the software program in whole or part. Users
- * may copy or modify Sun RPC without charge, but are not authorized
- * to license or distribute it to anyone else except as part of a product or
- * program developed by the user.
- *
- * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
- * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
- *
- * Sun RPC is provided with no support and without any obligation on the
- * part of Sun Microsystems, Inc. to assist in its use, correction,
- * modification or enhancement.
- *
- * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
- * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
- * OR ANY PART THEREOF.
- *
- * In no event will Sun Microsystems, Inc. be liable for any lost revenue
- * or profits or other special, indirect and consequential damages, even if
- * Sun has been advised of the possibility of such damages.
- *
- * Sun Microsystems, Inc.
- * 2550 Garcia Avenue
- * Mountain View, California 94043
- */
- #if !defined(lint) && defined(SCCSIDS)
- static char sccsid[] = "@(#)get_myaddress.c 1.4 87/08/11 Copyr 1984 Sun Micro";
- #endif
-
- /*
- * get_myaddress.c
- *
- * Get client's IP address via ioctl. This avoids using the yellowpages.
- * Copyright (C) 1984, Sun Microsystems, Inc.
- */
-
- #include <rpc/types.h>
- #include <rpc/pmap_prot.h>
- #include <sys/socket.h>
- #include <stdio.h>
- #undef _POSIX_SOURCE /* Ultrix <sys/param.h> needs --roland@gnu */
- #include <sys/param.h> /* Ultrix needs before net/if --roland@gnu */
- #include <net/if.h>
- #include <sys/ioctl.h>
- /* Order of following two #includes reversed by roland@gnu */
- #include <netinet/in.h>
- #include <arpa/inet.h>
-
- /*
- * don't use gethostbyname, which would invoke yellow pages
- */
- get_myaddress(addr)
- struct sockaddr_in *addr;
- {
- int s;
- char buf[BUFSIZ];
- struct ifconf ifc;
- struct ifreq ifreq, *ifr;
- int len;
-
- if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
- perror("get_myaddress: socket");
- exit(1);
- }
- ifc.ifc_len = sizeof (buf);
- ifc.ifc_buf = buf;
- if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) {
- perror("get_myaddress: ioctl (get interface configuration)");
- exit(1);
- }
- ifr = ifc.ifc_req;
- for (len = ifc.ifc_len; len; len -= sizeof ifreq) {
- ifreq = *ifr;
- if (ioctl(s, SIOCGIFFLAGS, (char *)&ifreq) < 0) {
- perror("get_myaddress: ioctl");
- exit(1);
- }
- if ((ifreq.ifr_flags & IFF_UP) &&
- ifr->ifr_addr.sa_family == AF_INET) {
- *addr = *((struct sockaddr_in *)&ifr->ifr_addr);
- addr->sin_port = htons(PMAPPORT);
- break;
- }
- ifr++;
- }
- (void) close(s);
- }
-