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locality.c
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locality.c
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/*****************************************************************************
*
* Copyright (C) 2001 Uppsala University & Ericsson AB.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Authors: Erik Nordström, <erik.nordstrom@it.uu.se>
*
*****************************************************************************/
#ifdef NS_PORT
#include "ns-2/aodv-uu.h"
#else
#include <netdb.h>
extern int h_errno;
#include "locality.h"
#include "defs.h"
#include "debug.h"
extern int gw_prefix;
#endif
int NS_CLASS locality(struct in_addr dest, unsigned int ifindex)
{
#ifndef NS_PORT
if (gw_prefix) {
if ((dest.s_addr & DEV_IFINDEX(ifindex).netmask.s_addr) ==
(DEV_IFINDEX(ifindex).ipaddr.s_addr & DEV_IFINDEX(ifindex).netmask.
s_addr))
return HOST_ADHOC;
else
return HOST_INET;
} else {
struct hostent *hent;
hent = gethostbyaddr(&dest, sizeof(struct in_addr), AF_INET);
if (!hent) {
switch (h_errno) {
case HOST_NOT_FOUND:
DEBUG(LOG_DEBUG, 0, "RREQ for Non-Internet dest %s",
ip_to_str(dest));
return HOST_UNKNOWN;
default:
DEBUG(LOG_DEBUG, 0, "Unknown DNS error");
break;
}
} else
return HOST_INET;
}
#else
char *dstnet = Address::instance().get_subnetaddr(dest.s_addr);
char *subnet =
Address::instance().get_subnetaddr(DEV_NR(NS_DEV_NR).ipaddr.s_addr);
DEBUG(LOG_DEBUG, 0, "myaddr=%d, dest=%d dstnet=%s subnet=%s",
DEV_NR(NS_DEV_NR).ipaddr.s_addr, dest.s_addr, dstnet, subnet);
if (subnet != NULL) {
if (dstnet != NULL) {
if (strcmp(dstnet, subnet) != 0) {
delete[]dstnet;
return HOST_INET;
}
delete[]dstnet;
}
delete[]subnet;
}
assert(dstnet == NULL);
return HOST_UNKNOWN;
#endif
return HOST_UNKNOWN;
}