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Diffstat (limited to 'include/net/ipv6.h')
-rw-r--r--include/net/ipv6.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index f73797e2fa60..25be4715578c 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -22,6 +22,7 @@
#include <net/flow.h>
#include <net/flow_dissector.h>
#include <net/snmp.h>
+#include <net/netns/hash.h>
#define SIN6_LEN_RFC2133 24
@@ -673,6 +674,22 @@ static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
cpu_to_be32(0x0000ffff))) == 0UL;
}
+static inline u32 ipv6_portaddr_hash(const struct net *net,
+ const struct in6_addr *addr6,
+ unsigned int port)
+{
+ unsigned int hash, mix = net_hash_mix(net);
+
+ if (ipv6_addr_any(addr6))
+ hash = jhash_1word(0, mix);
+ else if (ipv6_addr_v4mapped(addr6))
+ hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix);
+ else
+ hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix);
+
+ return hash ^ port;
+}
+
/*
* Check for a RFC 4843 ORCHID address
* (Overlay Routable Cryptographic Hash Identifiers)