Commit 27127a82 authored Oct 15, 2013 by Fan Du Committed by David S. Miller Oct 17, 2013

sctp: Use software crc32 checksum when xfrm transform will happen.

igb/ixgbe have hardware sctp checksum support, when this feature is enabled
and also IPsec is armed to protect sctp traffic, ugly things happened as
xfrm_output checks CHECKSUM_PARTIAL to do checksum operation(sum every thing
up and pack the 16bits result in the checksum field). The result is fail
establishment of sctp communication.

Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Fan Du <fan.du@windriver.com>
Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent e87b3998

net/sctp/output.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -536,7 +536,8 @@ int sctp_packet_transmit(struct sctp_packet *packet)
		* by CRC32-C as described in <draft-ietf-tsvwg-sctpcsum-02.txt>.
		*/
		if (!sctp_checksum_disable) {
		if (!(dst->dev->features & NETIF_F_SCTP_CSUM)) {
		if (!(dst->dev->features & NETIF_F_SCTP_CSUM) \|\|
		(dst_xfrm(dst) != NULL)) {
		__u32 crc32 = sctp_start_cksum((__u8 *)sh, cksum_buf_len);

		/* 3) Put the resultant value into the checksum field in the

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