1 /* $OpenBSD: in_var.h,v 1.4 2001/06/09 07:03:41 angelos Exp $ */ 2 /* $NetBSD: in_var.h,v 1.16 1996/02/13 23:42:15 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1985, 1986, 1993 6 * The Regents of the University of California. All rights reserved. 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)in_var.h 8.1 (Berkeley) 6/10/93 37 */ 38 39 #ifndef _NETINET_IN_VAR_H_ 40 #define _NETINET_IN_VAR_H_ 41 42 #include <sys/queue.h> 43 44 /* 45 * Interface address, Internet version. One of these structures 46 * is allocated for each interface with an Internet address. 47 * The ifaddr structure contains the protocol-independent part 48 * of the structure and is assumed to be first. 49 */ 50 struct in_ifaddr { 51 struct ifaddr ia_ifa; /* protocol-independent info */ 52 #define ia_ifp ia_ifa.ifa_ifp 53 #define ia_flags ia_ifa.ifa_flags 54 /* ia_{,sub}net{,mask} in host order */ 55 u_int32_t ia_net; /* network number of interface */ 56 u_int32_t ia_netmask; /* mask of net part */ 57 u_int32_t ia_subnet; /* subnet number, including net */ 58 u_int32_t ia_subnetmask; /* mask of subnet part */ 59 struct in_addr ia_netbroadcast; /* to recognize net broadcasts */ 60 TAILQ_ENTRY(in_ifaddr) ia_list; /* list of internet addresses */ 61 struct sockaddr_in ia_addr; /* reserve space for interface name */ 62 struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */ 63 #define ia_broadaddr ia_dstaddr 64 struct sockaddr_in ia_sockmask; /* reserve space for general netmask */ 65 LIST_HEAD(, in_multi) ia_multiaddrs; /* list of multicast addresses */ 66 }; 67 68 struct in_aliasreq { 69 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 70 struct sockaddr_in ifra_addr; 71 struct sockaddr_in ifra_dstaddr; 72 #define ifra_broadaddr ifra_dstaddr 73 struct sockaddr_in ifra_mask; 74 }; 75 /* 76 * Given a pointer to an in_ifaddr (ifaddr), 77 * return a pointer to the addr as a sockaddr_in. 78 */ 79 #define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr)) 80 81 82 #ifdef _KERNEL 83 TAILQ_HEAD(in_ifaddrhead, in_ifaddr); 84 extern struct in_ifaddrhead in_ifaddr; 85 extern struct ifqueue ipintrq; /* ip packet input queue */ 86 extern int inetctlerrmap[]; 87 void in_socktrim __P((struct sockaddr_in *)); 88 89 90 /* 91 * Macro for finding the interface (ifnet structure) corresponding to one 92 * of our IP addresses. 93 */ 94 #define INADDR_TO_IFP(addr, ifp) \ 95 /* struct in_addr addr; */ \ 96 /* struct ifnet *ifp; */ \ 97 { \ 98 register struct in_ifaddr *ia; \ 99 \ 100 for (ia = in_ifaddr.tqh_first; \ 101 ia != NULL && ia->ia_addr.sin_addr.s_addr != (addr).s_addr; \ 102 ia = ia->ia_list.tqe_next) \ 103 continue; \ 104 (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \ 105 } 106 107 /* 108 * Macro for finding the internet address structure (in_ifaddr) corresponding 109 * to a given interface (ifnet structure). 110 */ 111 #define IFP_TO_IA(ifp, ia) \ 112 /* struct ifnet *ifp; */ \ 113 /* struct in_ifaddr *ia; */ \ 114 { \ 115 for ((ia) = in_ifaddr.tqh_first; \ 116 (ia) != NULL && (ia)->ia_ifp != (ifp); \ 117 (ia) = (ia)->ia_list.tqe_next) \ 118 continue; \ 119 } 120 #endif 121 122 /* 123 * Per-interface router version information. 124 */ 125 struct router_info { 126 struct ifnet *rti_ifp; 127 int rti_type; /* type of router on this interface */ 128 int rti_age; /* time since last v1 query */ 129 struct router_info *rti_next; 130 }; 131 132 /* 133 * Internet multicast address structure. There is one of these for each IP 134 * multicast group to which this host belongs on a given network interface. 135 * They are kept in a linked list, rooted in the interface's in_ifaddr 136 * structure. 137 */ 138 struct in_multi { 139 struct in_addr inm_addr; /* IP multicast address */ 140 struct ifnet *inm_ifp; /* back pointer to ifnet */ 141 struct in_ifaddr *inm_ia; /* back pointer to in_ifaddr */ 142 u_int inm_refcount; /* no. membership claims by sockets */ 143 u_int inm_timer; /* IGMP membership report timer */ 144 LIST_ENTRY(in_multi) inm_list; /* list of multicast addresses */ 145 u_int inm_state; /* state of membership */ 146 struct router_info *inm_rti; /* router version info */ 147 }; 148 149 #ifdef _KERNEL 150 /* 151 * Structure used by macros below to remember position when stepping through 152 * all of the in_multi records. 153 */ 154 struct in_multistep { 155 struct in_ifaddr *i_ia; 156 struct in_multi *i_inm; 157 }; 158 159 /* 160 * Macro for looking up the in_multi record for a given IP multicast address 161 * on a given interface. If no matching record is found, "inm" returns NULL. 162 */ 163 #define IN_LOOKUP_MULTI(addr, ifp, inm) \ 164 /* struct in_addr addr; */ \ 165 /* struct ifnet *ifp; */ \ 166 /* struct in_multi *inm; */ \ 167 { \ 168 register struct in_ifaddr *ia; \ 169 \ 170 IFP_TO_IA((ifp), ia); \ 171 if (ia == NULL) \ 172 (inm) = NULL; \ 173 else \ 174 for ((inm) = ia->ia_multiaddrs.lh_first; \ 175 (inm) != NULL && (inm)->inm_addr.s_addr != (addr).s_addr; \ 176 (inm) = inm->inm_list.le_next) \ 177 continue; \ 178 } 179 180 /* 181 * Macro to step through all of the in_multi records, one at a time. 182 * The current position is remembered in "step", which the caller must 183 * provide. IN_FIRST_MULTI(), below, must be called to initialize "step" 184 * and get the first record. Both macros return a NULL "inm" when there 185 * are no remaining records. 186 */ 187 #define IN_NEXT_MULTI(step, inm) \ 188 /* struct in_multistep step; */ \ 189 /* struct in_multi *inm; */ \ 190 { \ 191 if (((inm) = (step).i_inm) != NULL) \ 192 (step).i_inm = (inm)->inm_list.le_next; \ 193 else \ 194 while ((step).i_ia != NULL) { \ 195 (inm) = (step).i_ia->ia_multiaddrs.lh_first; \ 196 (step).i_ia = (step).i_ia->ia_list.tqe_next; \ 197 if ((inm) != NULL) { \ 198 (step).i_inm = (inm)->inm_list.le_next; \ 199 break; \ 200 } \ 201 } \ 202 } 203 204 #define IN_FIRST_MULTI(step, inm) \ 205 /* struct in_multistep step; */ \ 206 /* struct in_multi *inm; */ \ 207 { \ 208 (step).i_ia = in_ifaddr.tqh_first; \ 209 (step).i_inm = NULL; \ 210 IN_NEXT_MULTI((step), (inm)); \ 211 } 212 213 int in_ifinit __P((struct ifnet *, 214 struct in_ifaddr *, struct sockaddr_in *, int)); 215 struct in_multi *in_addmulti __P((struct in_addr *, struct ifnet *)); 216 void in_delmulti __P((struct in_multi *)); 217 void in_ifscrub __P((struct ifnet *, struct in_ifaddr *)); 218 int in_control __P((struct socket *, u_long, caddr_t, struct ifnet *)); 219 #endif 220 221 222 /* INET6 stuff */ 223 #include <netinet6/in6_var.h> 224 225 #endif /* _NETINET_IN_VAR_H_ */ 226