[SCTP]: Fix sctp_cookie alignment in the packet.
authorVlad Yasevich <vladislav.yasevich@hp.com>
Tue, 17 Jan 2006 19:52:12 +0000 (11:52 -0800)
committerSridhar Samudrala <sri@us.ibm.com>
Tue, 17 Jan 2006 19:52:12 +0000 (11:52 -0800)
commit9834a2bb4970547540222fcba04e0a37d04cb0a0
treed86a2a4de740c815cead2748952035b1216269ef
parent7a48f923b8b27bfaa5f7b2a449a6fe268724ddd5
[SCTP]: Fix sctp_cookie alignment in the packet.

On 64 bit architectures, sctp_cookie sent as part of INIT-ACK is not
aligned on a 64 bit boundry and thus causes unaligned access exceptions.

The layout of the cookie prameter is this:
|<----- Parameter Header --------------------|<--- Cookie DATA --------
-----------------------------------------------------------------------
| param type (16 bits) | param len (16 bits) | sig [32 bytes] | cookie..
-----------------------------------------------------------------------

The cookie data portion contains 64 bit values on 64 bit architechtures
(timeval) that fall on a 32 bit alignment boundry when used as part of
the on-wire format, but align correctly when used in internal
structures.  This patch explicitely pads the on-wire format so that
it is properly aligned.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
include/net/sctp/structs.h
net/sctp/sm_make_chunk.c