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/* @(#)in_var.h 1.3 88/08/19 SMI; from UCB 7.1 6/5/86 */
/*
* Copyright (c) 1985, 1986 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
/*
* 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.
*/
#ifndef _netinet_in_var_h
#define _netinet_in_var_h
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 */
struct in_multi *ia_multiaddrs;/* list of multicast addresses */
};
/*
* 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
*/
#define IFA_ROUTE 0x01 /* routing entry installed */
#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 */
/*
* Per-interface router version information is kept in this list.
* This information should be part of the ifnet structure but we don't wish
* to change that - as it might break a number of things
*/
struct router_info {
struct ifnet *ifp;
int type; /* type of router which is querier on this interface */
int time; /* # of slow timeouts since last old query */
struct router_info *next;
};
/*
* 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 */
u_int inm_state; /* state of the membership */
struct router_info *inm_rti; /* router info*/
};
#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) \
/* struct in_multistep step; */ \
/* struct in_multi *inm; */ \
{ \
(step).i_ia = in_ifaddr; \
(step).i_inm = NULL; \
IN_NEXT_MULTI((step), (inm)); \
}
struct in_multi *in_addmulti();
#endif /* KERNEL */
#endif /*!_netinet_in_var_h*/
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