From af5fcba7f38f3166392f4087ab734433c84f160b Mon Sep 17 00:00:00 2001 From: Tom Herbert Date: Wed, 4 Jun 2014 17:19:48 -0700 Subject: 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 Signed-off-by: David S. Miller --- include/net/ip6_checksum.h | 12 ++++++++++++ include/net/udp.h | 9 +++++++++ 2 files changed, 21 insertions(+) (limited to 'include/net') diff --git a/include/net/ip6_checksum.h b/include/net/ip6_checksum.h index 8ac5c21f8456..55236cb71174 100644 --- a/include/net/ip6_checksum.h +++ b/include/net/ip6_checksum.h @@ -82,5 +82,17 @@ static inline void tcp_v6_send_check(struct sock *sk, struct sk_buff *skb) } #endif +static inline __sum16 udp_v6_check(int len, + const struct in6_addr *saddr, + const struct in6_addr *daddr, + __wsum base) +{ + return csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, base); +} + +void udp6_set_csum(bool nocheck, struct sk_buff *skb, + const struct in6_addr *saddr, + const struct in6_addr *daddr, int len); + int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, int proto); #endif 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) { -- cgit v1.2.3