1/*- 2 * Copyright (c) 2010-2011 Juniper Networks, Inc. 3 * All rights reserved. 4 * 5 * This software was developed by Robert N. M. Watson under contract 6 * to Juniper Networks, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 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. 16 * 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 27 * SUCH DAMAGE. 28 */ 29 30#include <sys/cdefs.h> 31 32__FBSDID("$FreeBSD$"); 33 34#include "opt_inet6.h" 35 36#include <sys/param.h> 37#include <sys/mbuf.h> 38 39#include <netinet/in.h> 40#include <netinet/in_pcb.h> 41#ifdef INET6 42#include <netinet6/in6_pcb.h> 43#endif /* INET6 */ 44 45/* 46 * Given a hash of whatever the covered tuple might be, return a pcbgroup 47 * index. 48 */ 49static __inline u_int 50in6_pcbgroup_getbucket(struct inpcbinfo *pcbinfo, uint32_t hash) 51{ 52 53 return (hash % pcbinfo->ipi_npcbgroups); 54} 55 56/* 57 * Map a (hashtype, hash) tuple into a connection group, or NULL if the hash 58 * information is insufficient to identify the pcbgroup. 59 */ 60struct inpcbgroup * 61in6_pcbgroup_byhash(struct inpcbinfo *pcbinfo, u_int hashtype, uint32_t hash) 62{ 63 64 return (NULL); 65} 66 67struct inpcbgroup * 68in6_pcbgroup_bymbuf(struct inpcbinfo *pcbinfo, struct mbuf *m) 69{ 70 71 return (in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m), 72 m->m_pkthdr.flowid)); 73} 74 75struct inpcbgroup * 76in6_pcbgroup_bytuple(struct inpcbinfo *pcbinfo, const struct in6_addr *laddrp, 77 u_short lport, const struct in6_addr *faddrp, u_short fport) 78{ 79 uint32_t hash; 80 81 switch (pcbinfo->ipi_hashfields) { 82 case IPI_HASHFIELDS_4TUPLE: 83 hash = faddrp->s6_addr32[3] ^ fport; 84 break; 85 86 case IPI_HASHFIELDS_2TUPLE: 87 hash = faddrp->s6_addr32[3] ^ laddrp->s6_addr32[3]; 88 break; 89 90 default: 91 hash = 0; 92 } 93 return (&pcbinfo->ipi_pcbgroups[in6_pcbgroup_getbucket(pcbinfo, 94 hash)]); 95} 96 97struct inpcbgroup * 98in6_pcbgroup_byinpcb(struct inpcb *inp) 99{ 100 101 return (in6_pcbgroup_bytuple(inp->inp_pcbinfo, &inp->in6p_laddr, 102 inp->inp_lport, &inp->in6p_faddr, inp->inp_fport)); 103} 104