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

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- 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
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4
net/ipv4/route.c
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@@ -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;
}