openvswitch: Add SCTP support

This patch adds support for rewriting SCTP src,dst ports similar to the
functionality already available for TCP/UDP.

Rewriting SCTP ports is expensive due to double-recalculation of the
SCTP checksums; this is performed to ensure that packets traversing OVS
with invalid checksums will continue to the destination with any
checksum corruption intact.

Reviewed-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Joe Stringer <joe@wand.net.nz>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/uapi/linux/openvswitch.h b/include/uapi/linux/openvswitch.h
index de1fa5d3780f..a74d375b439b 100644
--- a/include/uapi/linux/openvswitch.h
+++ b/include/uapi/linux/openvswitch.h
@@ -259,6 +259,7 @@ enum ovs_key_attr {
         OVS_KEY_ATTR_ND,        /* struct ovs_key_nd */
         OVS_KEY_ATTR_SKB_MARK,  /* u32 skb mark */
         OVS_KEY_ATTR_TUNNEL,    /* Nested set of ovs_tunnel attributes */
+        OVS_KEY_ATTR_SCTP,      /* struct ovs_key_sctp */
 
 #ifdef __KERNEL__
         OVS_KEY_ATTR_IPV4_TUNNEL,  /* struct ovs_key_ipv4_tunnel */
@@ -333,6 +334,11 @@ struct ovs_key_udp {
         __be16 udp_dst;
 };
 
+struct ovs_key_sctp {
+        __be16 sctp_src;
+        __be16 sctp_dst;
+};
+
 struct ovs_key_icmp {
         __u8 icmp_type;
         __u8 icmp_code;