static void rt_redirect_1(__u32 dst, __u32 gw, struct device *dev)
{
struct rtable *rt;
unsigned long hash = ip_rt_hash_code(dst);
if (gw == dev->pa_addr)
return;
if (dev != get_gw_dev(gw))
return;
rt = (struct rtable *) kmalloc(sizeof(struct rtable), GFP_ATOMIC);
if (rt == NULL)
return;
memset(rt, 0, sizeof(struct rtable));
rt->rt_flags = RTF_DYNAMIC | RTF_MODIFIED | RTF_HOST | RTF_GATEWAY | RTF_UP;
rt->rt_dst = dst;
rt->rt_dev = dev;
rt->rt_gateway = gw;
rt->rt_src = dev->pa_addr;
rt->rt_mtu = dev->mtu;
#ifdef CONFIG_NO_PATH_MTU_DISCOVERY
if (dev->mtu > 576)
rt->rt_mtu = 576;
#endif
rt->rt_lastuse = jiffies;
rt->rt_refcnt = 1;
rt_cache_add(hash, rt);
ip_rt_put(rt);
return;
}
void ip_rt_add(short flags, unsigned long dst, unsigned long mask, unsigned long gw, struct net_device *dev, \
unsigned short mtu, unsigned long window)
{
struct rtable *rt,*r,*prev;
struct rtable **rtp;
unsigned long rtflags;
// is dst is host address
if(flags & RTF_HOST)
mask = 0xffffffff;
// network address
else if(!mask)
{
// if(!((dst ^ dev->pa_mask) ^ dev->pa_addr))
if(!((dst ^ dev->pa_addr ) & dev->pa_mask ))
{
mask = dev->pa_mask;
flags &= ~RTF_GATEWAY;
}
else
mask = guess_mask(dst,dev);
dst &= mask;
}
if(gw == dev->pa_addr)
{
flags &= ~RTF_GATEWAY;
}
if(flags & RTF_GATEWAY)
{
if(dev != get_gw_dev(gw))
return;
flags |= RTF_GATEWAY;
}
else
gw = 0;
// rt = (struct rtable *)kmalloc(sizeof(struct rtable),GFP_ATOMIC);
if(rt == NULL)
return;
memset((char *)rt, 0, sizeof(struct rtable));
rt->rt_flags = flags | RTF_UP;
rt->rt_dst = dst;
rt->rt_dev = dev;
rt->rt_gateway = gw;
rt->rt_mask = mask;
// rt->rt_mss = dev->mtu - HEADER_SIZE;
rt->rt_window = 0;
if(rt->rt_flags & RTF_MSS)
rt->rt_mss = mtu;
if(rt->rt_flags & RTF_WINDOW)
rt->rt_window = window;
save_flags(rtflags);
cli();
rtp = &rt_base;
while((r = *rtp) != NULL)
{
if((r->rt_dst != dst) || r->rt_mask != mask)
{
rtp = &r->rt_next;
}
else
*rtp = r->rt_next;
// kfree_s(r,sizeof(struct rtable));
}
rtp = &rt_base;
while((r = *rtp) != NULL)
{
if((r->rt_mask & mask) != mask)
break;
rtp = &r->rt_next;
prev = r;
}
rt->rt_next = r;
prev->rt_next = rt;
// *rtp = rt;
// if((rt->rt_dev->flags & IFF_LOOPBACK) && !rt_loopback)
// rt_loopback = rt;
restore_flags(rtflags);
return;
}
