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