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/*-
* Copyright (c) 2010-2011 Juniper Networks, Inc.
* All rights reserved.
*
* This software was developed by Robert N. M. Watson under contract
* to Juniper Networks, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/mbuf.h>
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#ifdef INET6
#include <netinet6/in6_pcb.h>
#endif /* INET6 */
/*
* Given a hash of whatever the covered tuple might be, return a pcbgroup
* index.
*/
static __inline u_int
in6_pcbgroup_getbucket(struct inpcbinfo *pcbinfo, uint32_t hash)
{
return (hash % pcbinfo->ipi_npcbgroups);
}
/*
* Map a (hashtype, hash) tuple into a connection group, or NULL if the hash
* information is insufficient to identify the pcbgroup.
*/
struct inpcbgroup *
in6_pcbgroup_byhash(struct inpcbinfo *pcbinfo, u_int hashtype, uint32_t hash)
{
return (NULL);
}
struct inpcbgroup *
in6_pcbgroup_bymbuf(struct inpcbinfo *pcbinfo, struct mbuf *m)
{
return (in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
m->m_pkthdr.flowid));
}
struct inpcbgroup *
in6_pcbgroup_bytuple(struct inpcbinfo *pcbinfo, const struct in6_addr *laddrp,
u_short lport, const struct in6_addr *faddrp, u_short fport)
{
uint32_t hash;
switch (pcbinfo->ipi_hashfields) {
case IPI_HASHFIELDS_4TUPLE:
hash = faddrp->s6_addr32[3] ^ fport;
break;
case IPI_HASHFIELDS_2TUPLE:
hash = faddrp->s6_addr32[3] ^ laddrp->s6_addr32[3];
break;
default:
hash = 0;
}
return (&pcbinfo->ipi_pcbgroups[in6_pcbgroup_getbucket(pcbinfo,
hash)]);
}
struct inpcbgroup *
in6_pcbgroup_byinpcb(struct inpcb *inp)
{
return (in6_pcbgroup_bytuple(inp->inp_pcbinfo, &inp->in6p_laddr,
inp->inp_lport, &inp->in6p_faddr, inp->inp_fport));
}
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