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/* @(#)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
*/
#define __FORCE_GLIBC
#include <features.h>
/*
* 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>
//#include <net/if.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <rpc/clnt.h>
#include <unistd.h>
#ifdef __linux__
/* DO use gethostbyname because it's portable */
#include <netdb.h>
void get_myaddress(addr)
struct sockaddr_in *addr;
{
char localhost[256 + 1];
struct hostent *hp;
gethostname(localhost, 256);
if ((hp = gethostbyname(localhost)) == NULL) {
perror("get_myaddress: gethostbyname");
exit(1);
}
addr->sin_family = AF_INET;
bcopy((char *) hp->h_addr, (char *) &addr->sin_addr, hp->h_length);
addr->sin_port = htons(PMAPPORT);
}
#else
/*
* don't use gethostbyname, which would invoke yellow pages
*/
void 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);
}
#endif
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