linux.git/include/net/inet_sock.h, branch v2.6.29

tcp: Port redirection support for TCP

2008-10-01T14:46:49+00:00

Current TCP code relies on the local port of the listening socket
being the same as the destination address of the incoming
connection. Port redirection used by many transparent proxying
techniques obviously breaks this, so we have to store the original
destination port address.

This patch extends struct inet_request_sock and stores the incoming
destination port value there. It also modifies the handshake code to
use that value as the source port when sending reply packets.

Signed-off-by: KOVACS Krisztian 
Signed-off-by: David S. Miller

tcp: Handle TCP SYN+ACK/ACK/RST transparency

2008-10-01T14:41:00+00:00

The TCP stack sends out SYN+ACK/ACK/RST reply packets in response to
incoming packets. The non-local source address check on output bites
us again, as replies for transparently redirected traffic won't have a
chance to leave the node.

This patch selectively sets the FLOWI_FLAG_ANYSRC flag when doing the
route lookup for those replies. Transparent replies are enabled if the
listening socket has the transparent socket flag set.

Signed-off-by: KOVACS Krisztian 
Signed-off-by: David S. Miller

ipv4: Make inet_sock.h independent of route.h

2008-10-01T14:33:10+00:00

inet_iif() in inet_sock.h requires route.h. Since users of inet_iif()
usually require other route.h functionality anyway this patch moves
inet_iif() to route.h.

Signed-off-by: KOVACS Krisztian 
Signed-off-by: David S. Miller

ipv4: Implement IP_TRANSPARENT socket option

2008-10-01T14:30:02+00:00

This patch introduces the IP_TRANSPARENT socket option: enabling that
will make the IPv4 routing omit the non-local source address check on
output. Setting IP_TRANSPARENT requires NET_ADMIN capability.

Signed-off-by: KOVACS Krisztian 
Signed-off-by: David S. Miller

netns: introduce the net_hash_mix "salt" for hashes

2008-06-17T00:14:11+00:00

There are many possible ways to add this "salt", thus I made this
patch to be the last in the series to change it if required.

Currently I propose to use the struct net pointer itself as this 
salt, but since this pointer is most often cache-line aligned, shift 
this right to eliminate the bits, that are most often zeroed.

After this, simply add this mix to prepared hashfn-s.

For CONFIG_NET_NS=n case this salt is 0 and no changes in hashfn
appear.

Signed-off-by: Pavel Emelyanov 
Signed-off-by: David S. Miller

inet: add struct net argument to inet_ehashfn

2008-06-17T00:13:27+00:00

Although this hash takes addresses into account, the ehash chains
can also be too long when, for instance, communications via lo occur.
So, prepare the inet_hashfn to take struct net into account.

Signed-off-by: Pavel Emelyanov 
Signed-off-by: David S. Miller

inet{6}_request_sock: Init ->opt and ->pktopts in the constructor

2008-06-10T19:39:35+00:00

Wei Yongjun noticed that we may call reqsk_free on request sock objects where
the opt fields may not be initialized, fix it by introducing inet_reqsk_alloc
where we initialize ->opt to NULL and set ->pktopts to NULL in
inet6_reqsk_alloc.

Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: David S. Miller

[IPV4,IPV6]: Share cork.rt between IPv4 and IPv6.

2008-03-25T01:23:59+00:00

Signed-off-by: YOSHIFUJI Hideaki

[IPV4]: Remove unused ip_options->is_data.

2008-03-22T23:35:29+00:00

ip_options->is_data is assigned only and never checked. The structure is
not a part of kernel interface to the userspace. So, it is safe to remove
this field.

Signed-off-by: Denis V. Lunev 
Signed-off-by: David S. Miller

[IPV4]: Add 'rtable' field in struct sk_buff to alias 'dst' and avoid casts

2008-03-06T02:30:47+00:00

(Anonymous) unions can help us to avoid ugly casts.

A common cast it the (struct rtable *)skb->dst one.

Defining an union like  :
union {
     struct dst_entry *dst;
     struct rtable *rtable;
};
permits to use skb->rtable in place.

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller