Creation of Cybook 2416 (actually Gen4) repository

include/net/inet6_hashtables.h

@@ -0,0 +1,90 @@
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ * Authors:	Lotsa people, from code originally in tcp
+ *
+ *	This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _INET6_HASHTABLES_H
+#define _INET6_HASHTABLES_H
+
+
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+#include <linux/in6.h>
+#include <linux/ipv6.h>
+#include <linux/types.h>
+
+#include <net/ipv6.h>
+
+struct inet_hashinfo;
+
+/* I have no idea if this is a good hash for v6 or not. -DaveM */
+static inline unsigned int inet6_ehashfn(const struct in6_addr *laddr, const u16 lport,
+				const struct in6_addr *faddr, const __be16 fport)
+{
+	unsigned int hashent = (lport ^ (__force u16)fport);
+
+	hashent ^= (__force u32)(laddr->s6_addr32[3] ^ faddr->s6_addr32[3]);
+	hashent ^= hashent >> 16;
+	hashent ^= hashent >> 8;
+	return hashent;
+}
+
+static inline int inet6_sk_ehashfn(const struct sock *sk)
+{
+	const struct inet_sock *inet = inet_sk(sk);
+	const struct ipv6_pinfo *np = inet6_sk(sk);
+	const struct in6_addr *laddr = &np->rcv_saddr;
+	const struct in6_addr *faddr = &np->daddr;
+	const __u16 lport = inet->num;
+	const __be16 fport = inet->dport;
+	return inet6_ehashfn(laddr, lport, faddr, fport);
+}
+
+extern void __inet6_hash(struct inet_hashinfo *hashinfo, struct sock *sk);
+
+/*
+ * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
+ * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM
+ *
+ * The sockhash lock must be held as a reader here.
+ */
+extern struct sock *__inet6_lookup_established(struct inet_hashinfo *hashinfo,
+					   const struct in6_addr *saddr,
+					   const __be16 sport,
+					   const struct in6_addr *daddr,
+					   const u16 hnum,
+					   const int dif);
+
+extern struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
+					  const struct in6_addr *daddr,
+					  const unsigned short hnum,
+					  const int dif);
+
+static inline struct sock *__inet6_lookup(struct inet_hashinfo *hashinfo,
+					  const struct in6_addr *saddr,
+					  const __be16 sport,
+					  const struct in6_addr *daddr,
+					  const u16 hnum,
+					  const int dif)
+{
+	struct sock *sk = __inet6_lookup_established(hashinfo, saddr, sport,
+						     daddr, hnum, dif);
+	if (sk)
+		return sk;
+
+	return inet6_lookup_listener(hashinfo, daddr, hnum, dif);
+}
+
+extern struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
+				 const struct in6_addr *saddr, const __be16 sport,
+				 const struct in6_addr *daddr, const __be16 dport,
+				 const int dif);
+#endif /* defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) */
+#endif /* _INET6_HASHTABLES_H */