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- /*
- * Copyright (c) 1985, 1986 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that this notice is preserved and that due credit is given
- * to the University of California at Berkeley. The name of the University
- * may not be used to endorse or promote products derived from this
- * software without specific prior written permission. This software
- * is provided ``as is'' without express or implied warranty.
- *
- * @(#)in_var.h 7.2 (Berkeley) 12/7/87
- */
- /* HISTORY
- * 11-Jul-93 Mac Gillon (mgillon) at NeXT
- * Integrated MULTICAST support
- */
-
- /*
- * Interface address, Internet version. One of these structures
- * is allocated for each interface with an Internet address.
- * The ifaddr structure contains the protocol-independent part
- * of the structure and is assumed to be first.
- */
- struct in_ifaddr {
- struct ifaddr ia_ifa; /* protocol-independent info */
- #define ia_addr ia_ifa.ifa_addr
- #define ia_broadaddr ia_ifa.ifa_broadaddr
- #define ia_dstaddr ia_ifa.ifa_dstaddr
- #define ia_ifp ia_ifa.ifa_ifp
- u_long ia_net; /* network number of interface */
- u_long ia_netmask; /* mask of net part */
- u_long ia_subnet; /* subnet number, including net */
- u_long ia_subnetmask; /* mask of net + subnet */
- struct in_addr ia_netbroadcast; /* broadcast addr for (logical) net */
- int ia_flags;
- struct in_ifaddr *ia_next; /* next in list of internet addresses */
- #ifdef MULTICAST
- struct in_multi *ia_multiaddrs; /* list of multicast addresses */
- #endif
- };
-
- /*
- * Given a pointer to an in_ifaddr (ifaddr),
- * return a pointer to the addr as a sockadd_in.
- */
- #define IA_SIN(ia) ((struct sockaddr_in *)(&((struct in_ifaddr *)ia)->ia_addr))
- /*
- * ia_flags - Note these flags move into *ia_ifa in net2 (and 4.4) release
- */
- #define IFA_ROUTE 0x01 /* routing entry installed */
- #define IFA_NETMASK_AUTH 0x02 /* authoritative ICMP netmask server */
- #define IFA_AWAITING_MASK 0x04 /* ready to accept netmask reply */
-
- #ifdef KERNEL
- struct in_ifaddr *in_ifaddr;
- struct in_ifaddr *in_iaonnetof();
- struct ifqueue ipintrq; /* ip packet input queue */
- #endif
-
- #ifdef KERNEL
- /*
- * Macro for finding the interface (ifnet structure) corresponding to one
- * of our IP addresses.
- */
- #define INADDR_TO_IFP(addr, ifp) \
- /* struct in_addr addr; */ \
- /* struct ifnet *ifp; */ \
- { \
- register struct in_ifaddr *ia; \
- for (ia = in_ifaddr; \
- ia != NULL && IA_SIN(ia)->sin_addr.s_addr != (addr).s_addr; \
- ia = ia->ia_next); \
- (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \
- }
-
- /*
- * Macro for finding the internet address structure (in_ifaddr) corresponding
- * to a given interface (ifnet structure).
- */
- #define IFP_TO_IA(ifp, ia) \
- /* struct ifnet *ifp; */ \
- /* struct in_ifaddr *ia; */ \
- { \
- for ((ia) = in_ifaddr; \
- (ia) != NULL && (ia)->ia_ifp != (ifp); \
- (ia) = (ia)->ia_next); \
- }
- #endif KERNEL
-
- #ifdef MULTICAST
- /*
- * Internet multicast address structure. There is one of these for each IP
- * multicast group to which this host belongs on a given network interface.
- * They are kept in a linked list, rooted in the interface's in_ifaddr
- * structure.
- */
- struct in_multi {
- struct in_addr inm_addr; /* IP multicast address */
- struct ifnet *inm_ifp; /* back pointer to ifnet */
- struct in_ifaddr *inm_ia; /* back pointer to in_ifaddr */
- u_int inm_refcount; /* no. membership claims by sockets */
- u_int inm_timer; /* IGMP membership report timer */
- struct in_multi *inm_next; /* ptr to next multicast address */
- };
-
- #ifdef KERNEL
- /*
- * Structure used by macros below to remember position when stepping through
- * all of the in_multi records.
- */
- struct in_multistep {
- struct in_ifaddr *i_ia;
- struct in_multi *i_inm;
- };
-
- /*
- * Macro for looking up the in_multi record for a given IP multicast address
- * on a given interface. If no matching record is found, "inm" returns NULL.
- */
- #define IN_LOOKUP_MULTI(addr, ifp, inm) \
- /* struct in_addr addr; */ \
- /* struct ifnet *ifp; */ \
- /* struct in_multi *inm; */ \
- { \
- register struct in_ifaddr *ia; \
- IFP_TO_IA((ifp), ia); \
- if (ia == NULL) \
- (inm) = NULL; \
- else \
- for ((inm) = ia->ia_multiaddrs; \
- (inm) != NULL && (inm)->inm_addr.s_addr != (addr).s_addr; \
- (inm) = inm->inm_next); \
- }
-
- /*
- * Macro to step through all of the in_multi records, one at a time.
- * The current position is remembered in "step", which the caller must
- * provide. IN_FIRST_MULTI(), below, must be called to initialize "step"
- * and get the first record. Both macros return a NULL "inm" when there
- * are no remaining records.
- */
- #define IN_NEXT_MULTI(step, inm) \
- /* struct in_multistep step; */ \
- /* struct in_multi *inm; */ \
- { \
- if (((inm) = (step).i_inm) != NULL) { \
- (step).i_inm = (inm)->inm_next; \
- } \
- else while ((step).i_ia != NULL) { \
- (inm) = (step).i_ia->ia_multiaddrs; \
- (step).i_ia = (step).i_ia->ia_next; \
- if ((inm) != NULL) { \
- (step).i_inm = (inm)->inm_next; \
- break; \
- } \
- } \
- }
-
- #define IN_FIRST_MULTI(step, inm, ia) \
- /* struct in_multistep step; */ \
- /* struct in_multi *inm; */ \
- /* struct in_ifaddr *ia; */ \
- { \
- (step).i_ia = ia; \
- (step).i_inm = NULL; \
- IN_NEXT_MULTI((step), (inm)); \
- }
-
- struct in_multi *in_addmulti();
-
- #endif KERNEL
- #endif MULTICAST
-