in_var.h revision 84102
1238106Sdes/* 2238106Sdes * Copyright (c) 1985, 1986, 1993 3238106Sdes * The Regents of the University of California. All rights reserved. 4296415Sdes * 5238106Sdes * Redistribution and use in source and binary forms, with or without 6238106Sdes * modification, are permitted provided that the following conditions 7238106Sdes * are met: 8238106Sdes * 1. Redistributions of source code must retain the above copyright 9238106Sdes * notice, this list of conditions and the following disclaimer. 10238106Sdes * 2. Redistributions in binary form must reproduce the above copyright 11238106Sdes * notice, this list of conditions and the following disclaimer in the 12238106Sdes * documentation and/or other materials provided with the distribution. 13238106Sdes * 3. All advertising materials mentioning features or use of this software 14238106Sdes * must display the following acknowledgement: 15238106Sdes * This product includes software developed by the University of 16238106Sdes * California, Berkeley and its contributors. 17238106Sdes * 4. Neither the name of the University nor the names of its contributors 18238106Sdes * may be used to endorse or promote products derived from this software 19238106Sdes * without specific prior written permission. 20238106Sdes * 21238106Sdes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22238106Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23238106Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24238106Sdes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25238106Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26238106Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27238106Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28238106Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29238106Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30238106Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31238106Sdes * SUCH DAMAGE. 32238106Sdes * 33238106Sdes * @(#)in_var.h 8.2 (Berkeley) 1/9/95 34238106Sdes * $FreeBSD: head/sys/netinet/in_var.h 84102 2001-09-29 04:34:11Z jlemon $ 35238106Sdes */ 36238106Sdes 37238106Sdes#ifndef _NETINET_IN_VAR_H_ 38249141Sdes#define _NETINET_IN_VAR_H_ 39238106Sdes 40238106Sdes#include <sys/queue.h> 41238106Sdes#include <sys/fnv_hash.h> 42238106Sdes 43238106Sdes/* 44296415Sdes * Interface address, Internet version. One of these structures 45238106Sdes * is allocated for each Internet address on an interface. 46238106Sdes * The ifaddr structure contains the protocol-independent part 47296415Sdes * of the structure and is assumed to be first. 48238106Sdes */ 49296415Sdesstruct in_ifaddr { 50238106Sdes struct ifaddr ia_ifa; /* protocol-independent info */ 51238106Sdes#define ia_ifp ia_ifa.ifa_ifp 52296415Sdes#define ia_flags ia_ifa.ifa_flags 53238106Sdes /* ia_{,sub}net{,mask} in host order */ 54238106Sdes u_long ia_net; /* network number of interface */ 55238106Sdes u_long ia_netmask; /* mask of net part */ 56238106Sdes u_long ia_subnet; /* subnet number, including net */ 57238106Sdes u_long ia_subnetmask; /* mask of subnet part */ 58238106Sdes struct in_addr ia_netbroadcast; /* to recognize net broadcasts */ 59238106Sdes LIST_ENTRY(in_ifaddr) ia_hash; /* entry in bucket of inet addresses */ 60238106Sdes TAILQ_ENTRY(in_ifaddr) ia_link; /* list of internet addresses */ 61238106Sdes struct sockaddr_in ia_addr; /* reserve space for interface name */ 62238106Sdes struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */ 63238106Sdes#define ia_broadaddr ia_dstaddr 64238106Sdes struct sockaddr_in ia_sockmask; /* reserve space for general netmask */ 65238106Sdes}; 66238106Sdes 67238106Sdesstruct in_aliasreq { 68238106Sdes char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 69238106Sdes struct sockaddr_in ifra_addr; 70238106Sdes struct sockaddr_in ifra_broadaddr; 71238106Sdes#define ifra_dstaddr ifra_broadaddr 72238106Sdes struct sockaddr_in ifra_mask; 73238106Sdes}; 74238106Sdes/* 75238106Sdes * Given a pointer to an in_ifaddr (ifaddr), 76238106Sdes * return a pointer to the addr as a sockaddr_in. 77238106Sdes */ 78238106Sdes#define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr)) 79238106Sdes#define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr)) 80238106Sdes 81238106Sdes#define IN_LNAOF(in, ifa) \ 82238106Sdes ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask)) 83238106Sdes 84238106Sdes 85296415Sdes#ifdef _KERNEL 86238106Sdesextern struct ifqueue ipintrq; /* ip packet input queue */ 87238106Sdesextern struct in_addr zeroin_addr; 88238106Sdesextern u_char inetctlerrmap[]; 89238106Sdes 90238106Sdes/* 91238106Sdes * Hash table for IP addresses. 92238106Sdes */ 93238106Sdesextern LIST_HEAD(in_ifaddrhashhead, in_ifaddr) *in_ifaddrhashtbl; 94238106Sdesextern TAILQ_HEAD(in_ifaddrhead, in_ifaddr) in_ifaddrhead; 95238106Sdesextern u_long in_ifaddrhmask; /* mask for hash table */ 96238106Sdes 97238106Sdes#define INADDR_NHASH_LOG2 9 98238106Sdes#define INADDR_NHASH (1 << INADDR_NHASH_LOG2) 99238106Sdes#define INADDR_HMASK (INREASS_NHASH - 1) 100238106Sdes#define INADDR_HASHVAL(x) fnv_32_buf((&(x)), sizeof(x), FNV1_32_INIT) 101238106Sdes#define INADDR_HASH(x) \ 102238106Sdes (&in_ifaddrhashtbl[INADDR_HASHVAL(x) & in_ifaddrhmask]) 103238106Sdes 104238106Sdes 105238106Sdes/* 106238106Sdes * Macro for finding the interface (ifnet structure) corresponding to one 107238106Sdes * of our IP addresses. 108238106Sdes */ 109238106Sdes#define INADDR_TO_IFP(addr, ifp) \ 110238106Sdes /* struct in_addr addr; */ \ 111238106Sdes /* struct ifnet *ifp; */ \ 112238106Sdes{ \ 113238106Sdes struct in_ifaddr *ia; \ 114238106Sdes\ 115238106Sdes TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) \ 116238106Sdes if (IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) \ 117238106Sdes break; \ 118238106Sdes (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \ 119238106Sdes} 120238106Sdes 121238106Sdes/* 122238106Sdes * Macro for finding the internet address structure (in_ifaddr) corresponding 123238106Sdes * to a given interface (ifnet structure). 124238106Sdes */ 125296415Sdes#define IFP_TO_IA(ifp, ia) \ 126238106Sdes /* struct ifnet *ifp; */ \ 127238106Sdes /* struct in_ifaddr *ia; */ \ 128238106Sdes{ \ 129238106Sdes for ((ia) = TAILQ_FIRST(&in_ifaddrhead); \ 130296415Sdes (ia) != NULL && (ia)->ia_ifp != (ifp); \ 131296415Sdes (ia) = TAILQ_NEXT((ia), ia_link)) \ 132296415Sdes continue; \ 133296415Sdes} 134296415Sdes#endif 135296415Sdes 136238106Sdes/* 137238106Sdes * This information should be part of the ifnet structure but we don't wish 138296415Sdes * to change that - as it might break a number of things 139238106Sdes */ 140238106Sdes 141238106Sdesstruct router_info { 142296415Sdes struct ifnet *rti_ifp; 143296415Sdes int rti_type; /* type of router which is querier on this interface */ 144296415Sdes int rti_time; /* # of slow timeouts since last old query */ 145296415Sdes struct router_info *rti_next; 146296415Sdes}; 147296415Sdes 148296415Sdes/* 149296415Sdes * Internet multicast address structure. There is one of these for each IP 150238106Sdes * multicast group to which this host belongs on a given network interface. 151296415Sdes * For every entry on the interface's if_multiaddrs list which represents 152238106Sdes * an IP multicast group, there is one of these structures. They are also 153238106Sdes * kept on a system-wide list to make it easier to keep our legacy IGMP code 154238106Sdes * compatible with the rest of the world (see IN_FIRST_MULTI et al, below). 155296415Sdes */ 156296415Sdesstruct in_multi { 157238106Sdes LIST_ENTRY(in_multi) inm_link; /* queue macro glue */ 158296415Sdes struct in_addr inm_addr; /* IP multicast address, convenience */ 159296415Sdes struct ifnet *inm_ifp; /* back pointer to ifnet */ 160238106Sdes struct ifmultiaddr *inm_ifma; /* back pointer to ifmultiaddr */ 161238106Sdes u_int inm_timer; /* IGMP membership report timer */ 162238106Sdes u_int inm_state; /* state of the membership */ 163238106Sdes struct router_info *inm_rti; /* router info*/ 164238106Sdes}; 165238106Sdes 166296415Sdes#ifdef _KERNEL 167296415Sdes 168296415Sdes#ifdef SYSCTL_DECL 169296415SdesSYSCTL_DECL(_net_inet_ip); 170296415SdesSYSCTL_DECL(_net_inet_raw); 171296415Sdes#endif 172296415Sdes 173296415Sdesextern LIST_HEAD(in_multihead, in_multi) in_multihead; 174296415Sdes 175296415Sdes/* 176238106Sdes * Structure used by macros below to remember position when stepping through 177238106Sdes * all of the in_multi records. 178238106Sdes */ 179238106Sdesstruct in_multistep { 180238106Sdes struct in_multi *i_inm; 181238106Sdes}; 182238106Sdes 183238106Sdes/* 184238106Sdes * Macro for looking up the in_multi record for a given IP multicast address 185238106Sdes * on a given interface. If no matching record is found, "inm" is set null. 186238106Sdes */ 187238106Sdes#define IN_LOOKUP_MULTI(addr, ifp, inm) \ 188238106Sdes /* struct in_addr addr; */ \ 189249141Sdes /* struct ifnet *ifp; */ \ 190249141Sdes /* struct in_multi *inm; */ \ 191249141Sdesdo { \ 192249141Sdes struct ifmultiaddr *ifma; \ 193238106Sdes\ 194238106Sdes TAILQ_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) { \ 195238106Sdes if (ifma->ifma_addr->sa_family == AF_INET \ 196238106Sdes && ((struct sockaddr_in *)ifma->ifma_addr)->sin_addr.s_addr == \ 197238106Sdes (addr).s_addr) \ 198238106Sdes break; \ 199238106Sdes } \ 200238106Sdes (inm) = ifma ? ifma->ifma_protospec : 0; \ 201249141Sdes} while(0) 202238106Sdes 203238106Sdes/* 204238106Sdes * Macro to step through all of the in_multi records, one at a time. 205238106Sdes * The current position is remembered in "step", which the caller must 206238106Sdes * provide. IN_FIRST_MULTI(), below, must be called to initialize "step" 207296415Sdes * and get the first record. Both macros return a NULL "inm" when there 208296415Sdes * are no remaining records. 209296415Sdes */ 210296415Sdes#define IN_NEXT_MULTI(step, inm) \ 211296415Sdes /* struct in_multistep step; */ \ 212296415Sdes /* struct in_multi *inm; */ \ 213296415Sdesdo { \ 214296415Sdes if (((inm) = (step).i_inm) != NULL) \ 215296415Sdes (step).i_inm = LIST_NEXT((step).i_inm, inm_link); \ 216249141Sdes} while(0) 217249141Sdes 218249141Sdes#define IN_FIRST_MULTI(step, inm) \ 219249141Sdes /* struct in_multistep step; */ \ 220249141Sdes /* struct in_multi *inm; */ \ 221238106Sdesdo { \ 222238106Sdes (step).i_inm = LIST_FIRST(&in_multihead); \ 223238106Sdes IN_NEXT_MULTI((step), (inm)); \ 224238106Sdes} while(0) 225238106Sdes 226238106Sdesstruct route; 227238106Sdesstruct in_multi *in_addmulti __P((struct in_addr *, struct ifnet *)); 228238106Sdesvoid in_delmulti __P((struct in_multi *)); 229238106Sdesint in_control __P((struct socket *, u_long, caddr_t, struct ifnet *, 230238106Sdes struct thread *)); 231296415Sdesvoid in_rtqdrain __P((void)); 232238106Sdesvoid ip_input __P((struct mbuf *)); 233296415Sdesint in_ifadown __P((struct ifaddr *ifa, int)); 234238106Sdesvoid in_ifscrub __P((struct ifnet *, struct in_ifaddr *)); 235238106Sdesint ipflow_fastforward __P((struct mbuf *)); 236238106Sdesvoid ipflow_create __P((const struct route *, struct mbuf *)); 237238106Sdesvoid ipflow_slowtimo __P((void)); 238296415Sdes 239238106Sdes#endif /* _KERNEL */ 240296415Sdes 241238106Sdes/* INET6 stuff */ 242238106Sdes#include <netinet6/in6_var.h> 243238106Sdes 244238106Sdes#endif /* _NETINET_IN_VAR_H_ */ 245238106Sdes