dist/ipf/ipsend/in_var.h

   1 /*      $NetBSD: in_var.h,v 1.1 1999/12/11 22:24:08 veego Exp $ */
   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*/