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[IPV4]: Remove unsupported DNAT (RTCF_NAT and RTCF_NAT) in IPV4 

- The DNAT (Destination NAT) is not implemented in IPV4.

- This patch remove the code which checks these flags
in net/ipv4/arp.c and net/ipv4/route.c.

The RTCF_NAT and RTCF_NAT should stay in the header (linux/in_route.h)
because they are used in DECnet.

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rami Rosen 2008-01-09 00:18:24 -08:00 committed by David S. Miller
parent f0b5a0dcf1
commit cb7928a528
2 changed files with 4 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
net/ipv4/arp.c
View File

@ -835,9 +835,8 @@ static int arp_process(struct sk_buff *skb)
}
goto out;
} else if (IN_DEV_FORWARD(in_dev)) {
if ((rt->rt_flags&RTCF_DNAT) ||
(addr_type == RTN_UNICAST && rt->u.dst.dev != dev &&
(arp_fwd_proxy(in_dev, rt) || pneigh_lookup(&arp_tbl, &init_net, &tip, dev, 0)))) {
if (addr_type == RTN_UNICAST && rt->u.dst.dev != dev &&
(arp_fwd_proxy(in_dev, rt) || pneigh_lookup(&arp_tbl, &init_net, &tip, dev, 0))) {
n = neigh_event_ns(&arp_tbl, sha, &sip, dev);
if (n)
neigh_release(n);

4
net/ipv4/route.c
View File

@ -1768,7 +1768,7 @@ static inline int __mkroute_input(struct sk_buff *skb,
if (err)
flags |= RTCF_DIRECTSRC;
if (out_dev == in_dev && err && !(flags & (RTCF_NAT | RTCF_MASQ)) &&
if (out_dev == in_dev && err && !(flags & RTCF_MASQ) &&
(IN_DEV_SHARED_MEDIA(out_dev) ||
inet_addr_onlink(out_dev, saddr, FIB_RES_GW(*res))))
flags |= RTCF_DOREDIRECT;
@ -1777,7 +1777,7 @@ static inline int __mkroute_input(struct sk_buff *skb,
/* Not IP (i.e. ARP). Do not create route, if it is
* invalid for proxy arp. DNAT routes are always valid.
*/
if (out_dev == in_dev && !(flags & RTCF_DNAT)) {
if (out_dev == in_dev) {
err = -EINVAL;
goto cleanup;
}