[Lksctp-developers] Fix for SCTP: UDP_HIGH_BANDWIDTH is NOT High Bandwidth!

[Smythe, J. <js...@nu...>]

Sridhar,

                I have ten servers each with 4 x 1-gigabit/sec Ethernet
interfaces.  My project  would like to convert to SCTP, I cannot due to
a SCTP module bug.

When I have a point-to-point (UDP-style) SCTP association between 2 of
my servers there are 4 paths I can round-robin transmit on. This works
if I do NOT peel-off the association.  There is arbitrary code in
"sctp.ko" to block setting the far side peer address to a different peer
address that is a member of the same (peeled-off) association!

This means I can only use 1-gigabit/sec of my 4-gigabit/sec association
(if I peel off the socket for "High Bandwidth?" operations). 

 

I have a trivial fix(patch) that is working for my older version of SCTP
- Redhat  2.6.18-128.4.1.el5

(/usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/net/sctp/socket
.c)

 

The fix can easily be adapted to the newest version of SCTP.

 

See attached files. The "socket.c" is the new patched version.

 

If you have any questions, give me a call or email.

 

John R. Smythe

864-331-7094

 



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