2 * Copyright (c) 2010-2011 Juniper Networks, Inc.
5 * This software was developed by Robert N. M. Watson under contract
6 * to Juniper Networks, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include "opt_inet6.h"
36 #include <sys/param.h>
39 #include <netinet/in.h>
40 #include <netinet/in_pcb.h>
42 #include <netinet6/in6_pcb.h>
46 * Given a hash of whatever the covered tuple might be, return a pcbgroup
50 in6_pcbgroup_getbucket(struct inpcbinfo *pcbinfo, uint32_t hash)
53 return (hash % pcbinfo->ipi_npcbgroups);
57 * Map a (hashtype, hash) tuple into a connection group, or NULL if the hash
58 * information is insufficient to identify the pcbgroup.
61 in6_pcbgroup_byhash(struct inpcbinfo *pcbinfo, u_int hashtype, uint32_t hash)
68 in6_pcbgroup_bymbuf(struct inpcbinfo *pcbinfo, struct mbuf *m)
71 return (in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
76 in6_pcbgroup_bytuple(struct inpcbinfo *pcbinfo, const struct in6_addr *laddrp,
77 u_short lport, const struct in6_addr *faddrp, u_short fport)
81 switch (pcbinfo->ipi_hashfields) {
82 case IPI_HASHFIELDS_4TUPLE:
83 hash = faddrp->s6_addr32[3] ^ fport;
86 case IPI_HASHFIELDS_2TUPLE:
87 hash = faddrp->s6_addr32[3] ^ laddrp->s6_addr32[3];
93 return (&pcbinfo->ipi_pcbgroups[in6_pcbgroup_getbucket(pcbinfo,
98 in6_pcbgroup_byinpcb(struct inpcb *inp)
101 return (in6_pcbgroup_bytuple(inp->inp_pcbinfo, &inp->in6p_laddr,
102 inp->inp_lport, &inp->in6p_faddr, inp->inp_fport));