diff options
Diffstat (limited to 'include/net/sctp/checksum.h')
| -rw-r--r-- | include/net/sctp/checksum.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/include/net/sctp/checksum.h b/include/net/sctp/checksum.h index 0cb08e6fb6df..483e6303458d 100644 --- a/include/net/sctp/checksum.h +++ b/include/net/sctp/checksum.h @@ -25,7 +25,7 @@ * * Please send any bug reports or fixes you make to the * email address(es): - * lksctp developers <lksctp-developers@lists.sourceforge.net> + * lksctp developers <linux-sctp@vger.kernel.org> * * Or submit a bug report through the following website: * http://www.sf.net/projects/lksctp @@ -85,4 +85,19 @@ 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__ */ |