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Commit 27127a82 authored by Fan Du's avatar Fan Du Committed by David S. Miller
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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: default avatarFan Du <fan.du@windriver.com>
Signed-off-by: default avatarVlad Yasevich <vyasevich@gmail.com>
Acked-by: default avatarNeil Horman <nhorman@tuxdriver.com>
Signed-off-by: default avatarDavid 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