On Thu, Feb 21, 2013 at 10:14:51AM -0500, Neil Horman wrote: > On Thu, Feb 21, 2013 at 02:05:39PM +0100, Daniel Borkmann wrote: > > In our test lab, we have a simple SCTP client connecting to a SCTP > > server via an IPVS load balancer. On some machines, load balancing > > works, but on others the initial handshake just fails, thus no > > SCTP connection whatsoever can be established! > > > > We observed that the SCTP INIT-ACK handshake reply from the IPVS > > machine to the client had a correct IP checksum, but corrupt SCTP > > checksum when forwarded, thus on the client-side the packet was > > dropped and an intial handshake retriggered until all attempts > > run into the void. > > > > To fix this issue, this patch i) adds a missing CHECKSUM_UNNECESSARY > > after the full checksum (re-)calculation (as done in IPVS TCP and UDP > > code as well), and ii) calculates the checksum in little-endian format > > (as fixed with the SCTP code in commit 4458f04c: sctp: Clean up sctp > > checksumming code). Stable backport of upstream commit 4b47bc9a. > > > > Cc: Julian Anastasov <ja@xxxxxx> > > Cc: Simon Horman <horms@xxxxxxxxxxxx> > > Cc: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> > > Signed-off-by: Daniel Borkmann <dborkman@xxxxxxxxxx> [...] > Acked-by: Neil Horman <nhorman@xxxxxxxxxxxxx> Enqueued to -stable. Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-sctp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
