1 files changed, 53 insertions, 49 deletions

diff --git a/include/net/ip6_checksum.h b/include/net/ip6_checksum.h
index bc1b0fda2b0..55236cb7117 100644
--- a/include/net/ip6_checksum.h
+++ b/include/net/ip6_checksum.h
@@ -31,64 +31,68 @@
 #include <net/ip.h>
 #include <asm/checksum.h>
 #include <linux/in6.h>
+#include <linux/tcp.h>
+#include <linux/ipv6.h>
 
 #ifndef _HAVE_ARCH_IPV6_CSUM
+__sum16 csum_ipv6_magic(const struct in6_addr *saddr,
+			const struct in6_addr *daddr,
+			__u32 len, unsigned short proto,
+			__wsum csum);
+#endif
 
-static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
-					  const struct in6_addr *daddr,
-					  __u32 len, unsigned short proto,
-					  __wsum csum)
+static inline __wsum ip6_compute_pseudo(struct sk_buff *skb, int proto)
 {
+	return ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
+					    &ipv6_hdr(skb)->daddr,
+					    skb->len, proto, 0));
+}
 
-	int carry;
-	__u32 ulen;
-	__u32 uproto;
-	__u32 sum = (__force u32)csum;
-
-	sum += (__force u32)saddr->s6_addr32[0];
-	carry = (sum < (__force u32)saddr->s6_addr32[0]);
-	sum += carry;
-
-	sum += (__force u32)saddr->s6_addr32[1];
-	carry = (sum < (__force u32)saddr->s6_addr32[1]);
-	sum += carry;
-
-	sum += (__force u32)saddr->s6_addr32[2];
-	carry = (sum < (__force u32)saddr->s6_addr32[2]);
-	sum += carry;
-
-	sum += (__force u32)saddr->s6_addr32[3];
-	carry = (sum < (__force u32)saddr->s6_addr32[3]);
-	sum += carry;
-
-	sum += (__force u32)daddr->s6_addr32[0];
-	carry = (sum < (__force u32)daddr->s6_addr32[0]);
-	sum += carry;
-
-	sum += (__force u32)daddr->s6_addr32[1];
-	carry = (sum < (__force u32)daddr->s6_addr32[1]);
-	sum += carry;
-
-	sum += (__force u32)daddr->s6_addr32[2];
-	carry = (sum < (__force u32)daddr->s6_addr32[2]);
-	sum += carry;
+static __inline__ __sum16 tcp_v6_check(int len,
+				   const struct in6_addr *saddr,
+				   const struct in6_addr *daddr,
+				   __wsum base)
+{
+	return csum_ipv6_magic(saddr, daddr, len, IPPROTO_TCP, base);
+}
 
-	sum += (__force u32)daddr->s6_addr32[3];
-	carry = (sum < (__force u32)daddr->s6_addr32[3]);
-	sum += carry;
+static inline void __tcp_v6_send_check(struct sk_buff *skb,
+				       const struct in6_addr *saddr,
+				       const struct in6_addr *daddr)
+{
+	struct tcphdr *th = tcp_hdr(skb);
+
+	if (skb->ip_summed == CHECKSUM_PARTIAL) {
+		th->check = ~tcp_v6_check(skb->len, saddr, daddr, 0);
+		skb->csum_start = skb_transport_header(skb) - skb->head;
+		skb->csum_offset = offsetof(struct tcphdr, check);
+	} else {
+		th->check = tcp_v6_check(skb->len, saddr, daddr,
+					 csum_partial(th, th->doff << 2,
+						      skb->csum));
+	}
+}
 
-	ulen = (__force u32)htonl((__u32) len);
-	sum += ulen;
-	carry = (sum < ulen);
-	sum += carry;
+#if IS_ENABLED(CONFIG_IPV6)
+static inline void tcp_v6_send_check(struct sock *sk, struct sk_buff *skb)
+{
+	struct ipv6_pinfo *np = inet6_sk(sk);
 
-	uproto = (__force u32)htonl(proto);
-	sum += uproto;
-	carry = (sum < uproto);
-	sum += carry;
+	__tcp_v6_send_check(skb, &np->saddr, &sk->sk_v6_daddr);
+}
+#endif
 
-	return csum_fold((__force __wsum)sum);
+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);
 }
 
-#endif
+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