linux.git/net/sctp/inqueue.c, branch v2.6.29

[SCTP]: Stop claiming that this is a "reference implementation"

2008-02-05T15:59:07+00:00

I was notified by Randy Stewart that lksctp claims to be
"the reference implementation".  First of all, "the
refrence implementation" was the original implementation
of SCTP in usersapce written ty Randy and a few others.
Second, after looking at the definiton of 'reference implementation',
we don't really meet the requirements.

Signed-off-by: Vlad Yasevich

SCTP: Fix a potential race between timers and receive path.

2007-11-07T16:39:27+00:00

There is a possible race condition where the timer code will
free the association and the next packet in the queue will also
attempt to free the same association.

The example is, when we receive an ABORT at about the same time
as the retransmission timer fires.  If the timer wins the race,
it will free the association.  Once it releases the lock, the
queue processing will recieve the ABORT and will try to free
the association again.

Signed-off-by: Vlad Yasevich

[SCTP]: Implement the receive and verification of AUTH chunk

2007-10-10T23:51:31+00:00

This patch implements the receive path needed to process authenticated
chunks.  Add ability to process the AUTH chunk and handle edge cases
for authenticated COOKIE-ECHO as well.

Signed-off-by: Vlad Yasevich 
Signed-off-by: David S. Miller

SCTP: Validate buffer room when processing sequential chunks

2007-09-26T05:55:45+00:00

When we process bundled chunks, we need to make sure that
the skb has the buffer for each header since we assume it's
always there.  Some malicious node can send us something like
DATA + 2 bytes and we'll try to walk off the end refrencing
potentially uninitialized memory.

Signed-off-by: Vlad Yasevich

[SK_BUFF]: Convert skb->tail to sk_buff_data_t

2007-04-26T05:26:28+00:00

So that it is also an offset from skb->head, reduces its size from 8 to 4 bytes
on 64bit architectures, allowing us to combine the 4 bytes hole left by the
layer headers conversion, reducing struct sk_buff size to 256 bytes, i.e. 4
64byte cachelines, and since the sk_buff slab cache is SLAB_HWCACHE_ALIGN...
:-)

Many calculations that previously required that skb->{transport,network,
mac}_header be first converted to a pointer now can be done directly, being
meaningful as offsets or pointers.

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

[NET] SCTP: Fix whitespace errors.

2007-02-11T07:20:11+00:00

Signed-off-by: YOSHIFUJI Hideaki 
Signed-off-by: David S. Miller

WorkStruct: make allyesconfig

2006-11-22T14:57:56+00:00

Fix up for make allyesconfig.

Signed-Off-By: David Howells

[SCTP]: Extend /proc/net/sctp/snmp to provide more statistics.

2006-09-22T21:55:16+00:00

This patch adds more statistics info under /proc/net/sctp/snmp
that should be useful for debugging. The additional events that
are counted now include timer expirations, retransmits, packet
and data chunk discards.

The Data chunk discards include all the cases where a data chunk
is discarded including high tsn, bad stream, dup tsn and the most
useful one(out of receive buffer/rwnd).

Also moved the SCTP MIB data structures from the generic include
directories to include/sctp/sctp.h.

Signed-off-by: Sridhar Samudrala 
Signed-off-by: David S. Miller

[SCTP]: Allow spillover of receive buffer to avoid deadlock.

2006-05-06T00:02:09+00:00

This patch fixes a deadlock situation in the receive path by allowing
temporary spillover of the receive buffer.

- If the chunk we receive has a tsn that immediately follows the ctsn,
  accept it even if we run out of receive buffer space and renege data with
  higher TSNs.
- Once we accept one chunk in a packet, accept all the remaining chunks
  even if we run out of receive buffer space.

Signed-off-by: Neil Horman 
Acked-by: Mark Butler 
Acked-by: Vlad Yasevich 
Signed-off-by: Sridhar Samudrala 
Signed-off-by: David S. Miller

[SCTP]: Fix potential race condition between sctp_close() and sctp_rcv().

2006-01-17T19:51:28+00:00

Do not release the reference to association/endpoint if an incoming skb is
added to backlog. Instead release it after the chunk is processed in
sctp_backlog_rcv().

Signed-off-by: Sridhar Samudrala 
Signed-off-by: Vlad Yasevich