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/*
* host.c - Host and route handling
*
* Written 2001,2002 by Werner Almesberger
* Copyright 2001 EPFL-ICA
* Copyright 2002 Werner Almesberger
*/
#include <stdlib.h>
#include <stdio.h>
#include <memutil.h>
#include "tcsim.h"
#include "tckernel.h"
#include "host.h"
static struct host *hosts = NULL;
struct host *create_host(void)
{
struct host *host;
host = alloc_t(struct host);
host->routes = NULL;
host->next = hosts;
hosts = host;
return host;
}
void add_route(struct host *host,uint32_t addr,uint32_t mask,
struct net_device *dev)
{
struct route **rt;
if (dev->host != host)
errorf("route to \"%s\" on different host",dev->name);
addr &= mask; /* should this be an error ? */
for (rt = &host->routes; *rt; rt = &(*rt)->next)
if (!((*rt)->mask & ~mask) && !(((*rt)->addr^addr) & (*rt)->mask))
errorf("%u.%u.%u.%u netmask %u.%u.%u.%u clashes with %u.%u.%u.%u "
"netmask %u.%u.%u.%u",IPQ(addr),IPQ(mask),IPQ((*rt)->addr),
IPQ((*rt)->mask));
*rt = alloc_t(struct route);
(*rt)->addr = addr;
(*rt)->mask = mask;
(*rt)->dev = dev;
(*rt)->next = NULL;
}
void connect_dev(struct net_device *a,struct net_device *b)
{
if (a->peer) errorf("device %s is already connected",a->name);
if (b->peer) errorf("device %s is already connected",b->name);
a->peer = b;
b->peer = a;
}
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