This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / net / inet6_hashtables.h

diff --git a/include/net/inet6_hashtables.h b/include/net/inet6_hashtables.h
new file mode 100644 (file)
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+++ b/include/net/inet6_hashtables.h
@@ -0,0 +1,91 @@
+/*
+ * 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
+
+#include <linux/config.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 u16 fport)
+{
+       unsigned int hashent = (lport ^ fport);
+
+       hashent ^= (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 __u16 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 u16 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 u16 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 u16 sport,
+                                const struct in6_addr *daddr, const u16 dport,
+                                const int dif);
+#endif /* defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) */
+#endif /* _INET6_HASHTABLES_H */