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AmiTCP30b2.lha
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get_myaddress.c
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1994-03-09
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/*
* $Id: get_myaddress.c,v 1.3 1994/02/26 18:52:47 jraja Exp $
*
* $Log: get_myaddress.c,v $
* Revision 1.3 1994/02/26 18:52:47 jraja
* Added code using gethostid() if AMITCP is defined.
*
* Revision 1.2 1993/11/10 01:55:31 jraja
* Fixed includes.
* Search for non-loopback address if possible.
* Changed ioctl() and close() to IoctlSocket() and CloseSocket() for AMITCP.
*
*/
/* @(#)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 <sys/param.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <rpc/auth.h>
#include <rpc/clnt.h>
#include <rpc/pmap_prot.h>
#include <sys/socket.h>
#include <stdio.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
/*
* don't use gethostbyname, which would invoke yellow pages
*/
void
get_myaddress(struct sockaddr_in *addr)
{
#ifdef AMITCP
/*
* AmiTCP gethostid() is documented to return our primary IP address
* as the host id, use it.
*/
static struct sockaddr_in saddr = { sizeof(struct sockaddr_in),
AF_INET,
htons(PMAPPORT),
0 };
*addr = saddr;
addr->sin_addr.s_addr = gethostid();
#else
int s;
char buf[BUFSIZ];
struct ifconf ifc;
struct ifreq ifreq, *ifr;
int len, slop;
if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
perror("get_myaddress: socket");
exit(1);
}
ifc.ifc_len = sizeof (buf);
ifc.ifc_buf = buf;
#ifdef AMITCP
#define ioctl IoctlSocket
#endif
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 on first non-loopback address.
* Loopback address will remain if no other suitable
* address is found.
*/
if (!(ifreq.ifr_flags & IFF_LOOPBACK))
break;
}
/*
* Deal with variable length addresses
*/
slop = ifr->ifr_addr.sa_len - sizeof (struct sockaddr);
if (slop) {
ifr = (struct ifreq *) ((caddr_t)ifr + slop);
len -= slop;
}
ifr++;
}
#ifdef AMITCP
#undef ioctl
(void) CloseSocket(s);
#else
(void) close(s);
#endif
#endif /* !AMITCP */
}