linux-toradex.git/net/dccp/ipv4.c, branch v3.6.1

ipv4: Prepare for change of rt->rt_iif encoding.

2012-07-23T23:36:26+00:00

Use inet_iif() consistently, and for TCP record the input interface of
cached RX dst in inet sock.

rt->rt_iif is going to be encoded differently, so that we can
legitimately cache input routes in the FIB info more aggressively.

When the input interface is "use SKB device index" the rt->rt_iif will
be set to zero.

This forces us to move the TCP RX dst cache installation into the ipv4
specific code, and as well it should since doing the route caching for
ipv6 is pointless at the moment since it is not inspected in the ipv6
input paths yet.

Also, remove the unlikely on dst->obsolete, all ipv4 dsts have
obsolete set to a non-zero value to force invocation of the check
callback.

Signed-off-by: David S. Miller

ipv4: Kill FLOWI_FLAG_RT_NOCACHE and associated code.

2012-07-20T20:36:54+00:00

Signed-off-by: David S. Miller

net: Pass optional SKB and SK arguments to dst_ops->{update_pmtu,redirect}()

2012-07-17T10:29:28+00:00

This will be used so that we can compose a full flow key.

Even though we have a route in this context, we need more.  In the
future the routes will be without destination address, source address,
etc. keying.  One ipv4 route will cover entire subnets, etc.

In this environment we have to have a way to possess persistent storage
for redirects and PMTU information.  This persistent storage will exist
in the FIB tables, and that's why we'll need to be able to rebuild a
full lookup flow key here.  Using that flow key will do a fib_lookup()
and create/update the persistent entry.

Signed-off-by: David S. Miller

ipv4: Add helper inet_csk_update_pmtu().

2012-07-16T10:28:06+00:00

This abstracts away the call to dst_ops->update_pmtu() so that we can
transparently handle the fact that, in the future, the dst itself can
be invalidated by the PMTU update (when we have non-host routes cached
in sockets).

So we try to rebuild the socket cached route after the method
invocation if necessary.

This isn't used by SCTP because it needs to cache dsts per-transport,
and thus will need it's own local version of this helper.

Signed-off-by: David S. Miller

net: Remove checks for dst_ops->redirect being NULL.

2012-07-12T07:41:25+00:00

No longer necessary.

Signed-off-by: David S. Miller

ipv4: Add redirect support to all protocol icmp error handlers.

2012-07-12T04:27:49+00:00

Signed-off-by: David S. Miller

ipv4: tcp: dont cache output dst for syncookies

2012-06-23T04:47:33+00:00

Don't cache output dst for syncookies, as this adds pressure on IP route
cache and rcu subsystem for no gain.

Signed-off-by: Eric Dumazet 
Cc: Hans Schillstrom 
Signed-off-by: Jesper Dangaard Brouer 
Signed-off-by: David S. Miller

inet: makes syn_ack_timeout mandatory

2012-04-14T19:24:26+00:00

There are two struct request_sock_ops providers, tcp and dccp.

inet_csk_reqsk_queue_prune() can avoid testing syn_ack_timeout being
NULL if we make it non NULL like syn_ack_timeout

Signed-off-by: Eric Dumazet 
Cc: Gerrit Renker 
Cc: dccp@vger.kernel.org
Signed-off-by: David S. Miller

dccp: fix bug in sequence number validation during connection setup

2012-03-03T16:02:52+00:00

This fixes a bug in the sequence number validation during the initial handshake.

The code did not treat the initial sequence numbers ISS and ISR as read-only and
did not keep state for GSR and GSS as required by the specification. This causes
problems with retransmissions during the initial handshake, causing the
budding connection to be reset.

This patch now treats ISS/ISR as read-only and tracks GSS/GSR as required.

Signed-off-by: Samuel Jero 
Signed-off-by: Gerrit Renker

dccp: Evaluate ip_hdr() only once in dccp_v4_route_skb().

2011-12-01T18:28:34+00:00

This also works around a bogus gcc warning generated by an
upcoming patch from Eric Dumazet that rearranges the layout
of struct flowi4.

Signed-off-by: David S. Miller