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Diffstat (limited to 'include/net/sctp/checksum.h')
-rw-r--r--include/net/sctp/checksum.h23
1 files changed, 16 insertions, 7 deletions
diff --git a/include/net/sctp/checksum.h b/include/net/sctp/checksum.h
index 0cb08e6fb6df..259924d63ba6 100644
--- a/include/net/sctp/checksum.h
+++ b/include/net/sctp/checksum.h
@@ -25,10 +25,7 @@
*
* Please send any bug reports or fixes you make to the
* email address(es):
- * lksctp developers <lksctp-developers@lists.sourceforge.net>
- *
- * Or submit a bug report through the following website:
- * http://www.sf.net/projects/lksctp
+ * lksctp developers <linux-sctp@vger.kernel.org>
*
* Written or modified by:
* Dinakaran Joseph
@@ -37,9 +34,6 @@
*
* Rewritten to use libcrc32c by:
* Vlad Yasevich <vladislav.yasevich@hp.com>
- *
- * Any bugs reported given to us we will try to fix... any fixes shared will
- * be incorporated into the next SCTP release.
*/
#ifndef __sctp_checksum_h__
@@ -85,4 +79,19 @@ static inline __le32 sctp_end_cksum(__u32 crc32)
return cpu_to_le32(~crc32);
}
+/* Calculate the CRC32C checksum of an SCTP packet. */
+static inline __le32 sctp_compute_cksum(const struct sk_buff *skb,
+ unsigned int offset)
+{
+ const struct sk_buff *iter;
+
+ __u32 crc32 = sctp_start_cksum(skb->data + offset,
+ skb_headlen(skb) - offset);
+ skb_walk_frags(skb, iter)
+ crc32 = sctp_update_cksum((__u8 *) iter->data,
+ skb_headlen(iter), crc32);
+
+ return sctp_end_cksum(crc32);
+}
+
#endif /* __sctp_checksum_h__ */