1 /* $FreeBSD: stable/9/contrib/ipfilter/ipsend/in_var.h 145519 2005-04-25 18:20:15Z darrenr $ */ 2 3 /* @(#)in_var.h 1.3 88/08/19 SMI; from UCB 7.1 6/5/86 */ 4 5 /* 6 * Copyright (c) 1985, 1986 Regents of the University of California. 7 * All rights reserved. The Berkeley software License Agreement 8 * specifies the terms and conditions for redistribution. 9 */ 10 11 /* 12 * Interface address, Internet version. One of these structures 13 * is allocated for each interface with an Internet address. 14 * The ifaddr structure contains the protocol-independent part 15 * of the structure and is assumed to be first. 16 */ 17 18 #ifndef _netinet_in_var_h 19 #define _netinet_in_var_h 20 21 struct in_ifaddr { 22 struct ifaddr ia_ifa; /* protocol-independent info */ 23 #define ia_addr ia_ifa.ifa_addr 24 #define ia_broadaddr ia_ifa.ifa_broadaddr 25 #define ia_dstaddr ia_ifa.ifa_dstaddr 26 #define ia_ifp ia_ifa.ifa_ifp 27 u_long ia_net; /* network number of interface */ 28 u_long ia_netmask; /* mask of net part */ 29 u_long ia_subnet; /* subnet number, including net */ 30 u_long ia_subnetmask; /* mask of net + subnet */ 31 struct in_addr ia_netbroadcast; /* broadcast addr for (logical) net */ 32 int ia_flags; 33 struct in_ifaddr *ia_next; /* next in list of internet addresses */ 34 struct in_multi *ia_multiaddrs;/* list of multicast addresses */ 35 }; 36 /* 37 * Given a pointer to an in_ifaddr (ifaddr), 38 * return a pointer to the addr as a sockadd_in. 39 */ 40 #define IA_SIN(ia) ((struct sockaddr_in *)(&((struct in_ifaddr *)ia)->ia_addr)) 41 /* 42 * ia_flags 43 */ 44 #define IFA_ROUTE 0x01 /* routing entry installed */ 45 46 #ifdef KERNEL 47 struct in_ifaddr *in_ifaddr; 48 struct in_ifaddr *in_iaonnetof(); 49 struct ifqueue ipintrq; /* ip packet input queue */ 50 #endif 51 52 #ifdef KERNEL 53 /* 54 * Macro for finding the interface (ifnet structure) corresponding to one 55 * of our IP addresses. 56 */ 57 #define INADDR_TO_IFP(addr, ifp) \ 58 /* struct in_addr addr; */ \ 59 /* struct ifnet *ifp; */ \ 60 { \ 61 register struct in_ifaddr *ia; \ 62 \ 63 for (ia = in_ifaddr; \ 64 ia != NULL && IA_SIN(ia)->sin_addr.s_addr != (addr).s_addr; \ 65 ia = ia->ia_next); \ 66 (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \ 67 } 68 69 /* 70 * Macro for finding the internet address structure (in_ifaddr) corresponding 71 * to a given interface (ifnet structure). 72 */ 73 #define IFP_TO_IA(ifp, ia) \ 74 /* struct ifnet *ifp; */ \ 75 /* struct in_ifaddr *ia; */ \ 76 { \ 77 for ((ia) = in_ifaddr; \ 78 (ia) != NULL && (ia)->ia_ifp != (ifp); \ 79 (ia) = (ia)->ia_next); \ 80 } 81 #endif /* KERNEL */ 82 83 /* 84 * Per-interface router version information is kept in this list. 85 * This information should be part of the ifnet structure but we don't wish 86 * to change that - as it might break a number of things 87 */ 88 89 struct router_info { 90 struct ifnet *ifp; 91 int type; /* type of router which is querier on this interface */ 92 int time; /* # of slow timeouts since last old query */ 93 struct router_info *next; 94 }; 95 96 /* 97 * Internet multicast address structure. There is one of these for each IP 98 * multicast group to which this host belongs on a given network interface. 99 * They are kept in a linked list, rooted in the interface's in_ifaddr 100 * structure. 101 */ 102 103 struct in_multi { 104 struct in_addr inm_addr; /* IP multicast address */ 105 struct ifnet *inm_ifp; /* back pointer to ifnet */ 106 struct in_ifaddr *inm_ia; /* back pointer to in_ifaddr */ 107 u_int inm_refcount;/* no. membership claims by sockets */ 108 u_int inm_timer; /* IGMP membership report timer */ 109 struct in_multi *inm_next; /* ptr to next multicast address */ 110 u_int inm_state; /* state of the membership */ 111 struct router_info *inm_rti; /* router info*/ 112 }; 113 114 #ifdef KERNEL 115 /* 116 * Structure used by macros below to remember position when stepping through 117 * all of the in_multi records. 118 */ 119 struct in_multistep { 120 struct in_ifaddr *i_ia; 121 struct in_multi *i_inm; 122 }; 123 124 /* 125 * Macro for looking up the in_multi record for a given IP multicast address 126 * on a given interface. If no matching record is found, "inm" returns NULL. 127 */ 128 #define IN_LOOKUP_MULTI(addr, ifp, inm) \ 129 /* struct in_addr addr; */ \ 130 /* struct ifnet *ifp; */ \ 131 /* struct in_multi *inm; */ \ 132 { \ 133 register struct in_ifaddr *ia; \ 134 \ 135 IFP_TO_IA((ifp), ia); \ 136 if (ia == NULL) \ 137 (inm) = NULL; \ 138 else \ 139 for ((inm) = ia->ia_multiaddrs; \ 140 (inm) != NULL && (inm)->inm_addr.s_addr != (addr).s_addr; \ 141 (inm) = inm->inm_next); \ 142 } 143 144 /* 145 * Macro to step through all of the in_multi records, one at a time. 146 * The current position is remembered in "step", which the caller must 147 * provide. IN_FIRST_MULTI(), below, must be called to initialize "step" 148 * and get the first record. Both macros return a NULL "inm" when there 149 * are no remaining records. 150 */ 151 #define IN_NEXT_MULTI(step, inm) \ 152 /* struct in_multistep step; */ \ 153 /* struct in_multi *inm; */ \ 154 { \ 155 if (((inm) = (step).i_inm) != NULL) { \ 156 (step).i_inm = (inm)->inm_next; \ 157 } \ 158 else while ((step).i_ia != NULL) { \ 159 (inm) = (step).i_ia->ia_multiaddrs; \ 160 (step).i_ia = (step).i_ia->ia_next; \ 161 if ((inm) != NULL) { \ 162 (step).i_inm = (inm)->inm_next; \ 163 break; \ 164 } \ 165 } \ 166 } 167 168 #define IN_FIRST_MULTI(step, inm) \ 169 /* struct in_multistep step; */ \ 170 /* struct in_multi *inm; */ \ 171 { \ 172 (step).i_ia = in_ifaddr; \ 173 (step).i_inm = NULL; \ 174 IN_NEXT_MULTI((step), (inm)); \ 175 } 176 177 struct in_multi *in_addmulti(); 178 #endif /* KERNEL */ 179 #endif /*!_netinet_in_var_h*/ 180