in_var.h revision 8876
1/* 2 * Copyright (c) 1985, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)in_var.h 8.1 (Berkeley) 6/10/93 34 * $Id: in_var.h,v 1.9 1995/03/23 18:14:41 wollman Exp $ 35 */ 36 37#ifndef _NETINET_IN_VAR_H_ 38#define _NETINET_IN_VAR_H_ 39 40#include <sys/queue.h> 41 42/* 43 * Interface address, Internet version. One of these structures 44 * is allocated for each interface with an Internet address. 45 * The ifaddr structure contains the protocol-independent part 46 * of the structure and is assumed to be first. 47 */ 48struct in_ifaddr { 49 struct ifaddr ia_ifa; /* protocol-independent info */ 50#define ia_ifp ia_ifa.ifa_ifp 51#define ia_flags ia_ifa.ifa_flags 52 /* ia_{,sub}net{,mask} in host order */ 53 u_long ia_net; /* network number of interface */ 54 u_long ia_netmask; /* mask of net part */ 55 u_long ia_subnet; /* subnet number, including net */ 56 u_long ia_subnetmask; /* mask of subnet part */ 57 struct in_addr ia_netbroadcast; /* to recognize net broadcasts */ 58 struct in_ifaddr *ia_next; /* next in list of internet addresses */ 59 struct sockaddr_in ia_addr; /* reserve space for interface name */ 60 struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */ 61#define ia_broadaddr ia_dstaddr 62 struct sockaddr_in ia_sockmask; /* reserve space for general netmask */ 63 LIST_HEAD(in_multihead, in_multi) ia_multiaddrs; 64 /* list of multicast addresses */ 65}; 66 67struct in_aliasreq { 68 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 69 struct sockaddr_in ifra_addr; 70 struct sockaddr_in ifra_broadaddr; 71#define ifra_dstaddr ifra_broadaddr 72 struct sockaddr_in ifra_mask; 73}; 74/* 75 * Given a pointer to an in_ifaddr (ifaddr), 76 * return a pointer to the addr as a sockaddr_in. 77 */ 78#define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr)) 79#define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr)) 80 81#define IN_LNAOF(in, ifa) \ 82 ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask)) 83 84 85#ifdef KERNEL 86extern struct in_ifaddr *in_ifaddr; 87extern struct ifqueue ipintrq; /* ip packet input queue */ 88extern struct in_addr zeroin_addr; 89extern u_char inetctlerrmap[]; 90extern int rtq_reallyold; /* XXX */ 91extern int rtq_minreallyold; /* XXX */ 92extern int rtq_toomany; /* XXX */ 93 94/* 95 * Macro for finding the interface (ifnet structure) corresponding to one 96 * of our IP addresses. 97 */ 98#define INADDR_TO_IFP(addr, ifp) \ 99 /* struct in_addr addr; */ \ 100 /* struct ifnet *ifp; */ \ 101{ \ 102 register struct in_ifaddr *ia; \ 103\ 104 for (ia = in_ifaddr; \ 105 ia != NULL && ((ia->ia_ifp->if_flags & IFF_POINTOPOINT)? \ 106 IA_DSTSIN(ia):IA_SIN(ia))->sin_addr.s_addr != (addr).s_addr; \ 107 ia = ia->ia_next) \ 108 continue; \ 109 (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \ 110} 111 112/* 113 * Macro for finding the internet address structure (in_ifaddr) corresponding 114 * to a given interface (ifnet structure). 115 */ 116#define IFP_TO_IA(ifp, ia) \ 117 /* struct ifnet *ifp; */ \ 118 /* struct in_ifaddr *ia; */ \ 119{ \ 120 for ((ia) = in_ifaddr; \ 121 (ia) != NULL && (ia)->ia_ifp != (ifp); \ 122 (ia) = (ia)->ia_next) \ 123 continue; \ 124} 125#endif 126 127/* 128 * This information should be part of the ifnet structure but we don't wish 129 * to change that - as it might break a number of things 130 */ 131 132struct router_info { 133 struct ifnet *ifp; 134 int type; /* type of router which is querier on this interface */ 135 int time; /* # of slow timeouts since last old query */ 136 struct router_info *next; 137}; 138 139/* 140 * Internet multicast address structure. There is one of these for each IP 141 * multicast group to which this host belongs on a given network interface. 142 * They are kept in a linked list, rooted in the interface's in_ifaddr 143 * structure. 144 */ 145struct in_multi { 146 LIST_ENTRY(in_multi) inm_entry; /* list glue */ 147 struct in_addr inm_addr; /* IP multicast address */ 148 struct ifnet *inm_ifp; /* back pointer to ifnet */ 149 struct in_ifaddr *inm_ia; /* back pointer to in_ifaddr */ 150 u_int inm_refcount; /* no. membership claims by sockets */ 151 u_int inm_timer; /* IGMP membership report timer */ 152 u_int inm_state; /* state of the membership */ 153 struct router_info *inm_rti; /* router info*/ 154}; 155 156#ifdef KERNEL 157/* 158 * Structure used by macros below to remember position when stepping through 159 * all of the in_multi records. 160 */ 161struct in_multistep { 162 struct in_ifaddr *i_ia; 163 struct in_multi *i_inm; 164}; 165 166/* 167 * Macro for looking up the in_multi record for a given IP multicast address 168 * on a given interface. If no matching record is found, "inm" returns NULL. 169 */ 170#define IN_LOOKUP_MULTI(addr, ifp, inm) \ 171 /* struct in_addr addr; */ \ 172 /* struct ifnet *ifp; */ \ 173 /* struct in_multi *inm; */ \ 174{ \ 175 register struct in_ifaddr *ia; \ 176\ 177 IFP_TO_IA((ifp), ia); \ 178 if (ia == NULL) \ 179 (inm) = NULL; \ 180 else \ 181 for ((inm) = ia->ia_multiaddrs.lh_first; \ 182 (inm) != NULL && (inm)->inm_addr.s_addr != (addr).s_addr; \ 183 (inm) = inm->inm_entry.le_next) \ 184 continue; \ 185} 186 187/* 188 * Macro to step through all of the in_multi records, one at a time. 189 * The current position is remembered in "step", which the caller must 190 * provide. IN_FIRST_MULTI(), below, must be called to initialize "step" 191 * and get the first record. Both macros return a NULL "inm" when there 192 * are no remaining records. 193 */ 194#define IN_NEXT_MULTI(step, inm) \ 195 /* struct in_multistep step; */ \ 196 /* struct in_multi *inm; */ \ 197{ \ 198 if (((inm) = (step).i_inm) != NULL) \ 199 (step).i_inm = (inm)->inm_entry.le_next; \ 200 else \ 201 while ((step).i_ia != NULL) { \ 202 (inm) = (step).i_ia->ia_multiaddrs.lh_first; \ 203 (step).i_ia = (step).i_ia->ia_next; \ 204 if ((inm) != NULL) { \ 205 (step).i_inm = (inm)->inm_entry.le_next; \ 206 break; \ 207 } \ 208 } \ 209} 210 211#define IN_FIRST_MULTI(step, inm) \ 212 /* struct in_multistep step; */ \ 213 /* struct in_multi *inm; */ \ 214{ \ 215 (step).i_ia = in_ifaddr; \ 216 (step).i_inm = NULL; \ 217 IN_NEXT_MULTI((step), (inm)); \ 218} 219 220int in_ifinit __P((struct ifnet *, 221 struct in_ifaddr *, struct sockaddr_in *, int)); 222struct in_multi *in_addmulti __P((struct in_addr *, struct ifnet *)); 223void in_delmulti __P((struct in_multi *)); 224void in_ifscrub __P((struct ifnet *, struct in_ifaddr *)); 225int in_control __P((struct socket *, int, caddr_t, struct ifnet *)); 226 227#endif 228#endif 229