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/* $FreeBSD$ */
/*
* Copyright (C) 2002-2003 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* $Id: hostname.c,v 1.6.2.2 2007/01/16 02:25:22 darrenr Exp $
*/
#include "ipf.h"
char *hostname(v, ip)
int v;
void *ip;
{
static char hostbuf[MAXHOSTNAMELEN+1];
struct hostent *hp;
struct in_addr ipa;
struct netent *np;
memset(&ipa, 0, sizeof(ipa)); /* XXX gcc */
if (v == 4) {
ipa.s_addr = *(u_32_t *)ip;
if (ipa.s_addr == htonl(0xfedcba98))
return "test.host.dots";
}
if ((opts & OPT_NORESOLVE) == 0) {
if (v == 4) {
hp = gethostbyaddr(ip, 4, AF_INET);
if (hp != NULL && hp->h_name != NULL &&
*hp->h_name != '\0') {
strncpy(hostbuf, hp->h_name, sizeof(hostbuf));
hostbuf[sizeof(hostbuf) - 1] = '\0';
return hostbuf;
}
np = getnetbyaddr(ipa.s_addr, AF_INET);
if (np != NULL && np->n_name != NULL &&
*np->n_name != '\0') {
strncpy(hostbuf, np->n_name, sizeof(hostbuf));
hostbuf[sizeof(hostbuf) - 1] = '\0';
return hostbuf;
}
}
}
if (v == 4) {
return inet_ntoa(ipa);
}
#ifdef USE_INET6
(void) inet_ntop(AF_INET6, ip, hostbuf, sizeof(hostbuf) - 1);
hostbuf[MAXHOSTNAMELEN] = '\0';
return hostbuf;
#else
return "IPv6";
#endif
}
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