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authorTom Herbert <therbert@google.com>2014-06-04 17:19:48 -0700
committerDavid S. Miller <davem@davemloft.net>2014-06-04 22:46:38 -0700
commitaf5fcba7f38f3166392f4087ab734433c84f160b (patch)
tree8a6deba10cd458a72e159112ab6381bcaa352b3e /include/net/udp.h
parent6579867c8b02606e101a6c511c2511b027ed3f4a (diff)
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udp: Generic functions to set checksum
Added udp_set_csum and udp6_set_csum functions to set UDP checksums in packets. These are for simple UDP packets such as those that might be created in UDP tunnels. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/udp.h')
-rw-r--r--include/net/udp.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/net/udp.h b/include/net/udp.h
index 5eb86874bcd6..2ecfc6e15609 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -147,6 +147,15 @@ static inline __wsum udp_csum(struct sk_buff *skb)
return csum;
}
+static inline __sum16 udp_v4_check(int len, __be32 saddr,
+ __be32 daddr, __wsum base)
+{
+ return csum_tcpudp_magic(saddr, daddr, len, IPPROTO_UDP, base);
+}
+
+void udp_set_csum(bool nocheck, struct sk_buff *skb,
+ __be32 saddr, __be32 daddr, int len);
+
/* hash routines shared between UDPv4/6 and UDP-Litev4/6 */
static inline void udp_lib_hash(struct sock *sk)
{