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/* $OpenBSD: in_var.h,v 1.10 2007/07/20 19:00:35 claudio Exp $ */
/* $NetBSD: in_var.h,v 1.16 1996/02/13 23:42:15 christos Exp $ */
/*
* Copyright (c) 1985, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)in_var.h 8.1 (Berkeley) 6/10/93
*/
#ifndef _NETINET_IN_VAR_H_
#define _NETINET_IN_VAR_H_
#include <sys/queue.h>
/*
* 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_ifp ia_ifa.ifa_ifp
#define ia_flags ia_ifa.ifa_flags
/* ia_{,sub}net{,mask} in host order */
u_int32_t ia_net; /* network number of interface */
u_int32_t ia_netmask; /* mask of net part */
u_int32_t ia_subnet; /* subnet number, including net */
u_int32_t ia_subnetmask; /* mask of subnet part */
struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
TAILQ_ENTRY(in_ifaddr) ia_list; /* list of internet addresses */
struct sockaddr_in ia_addr; /* reserve space for interface name */
struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */
#define ia_broadaddr ia_dstaddr
struct sockaddr_in ia_sockmask; /* reserve space for general netmask */
LIST_HEAD(, in_multi) ia_multiaddrs; /* list of multicast addresses */
struct in_multi *ia_allhosts; /* multicast address record for
the allhosts multicast group */
};
struct in_aliasreq {
char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
struct sockaddr_in ifra_addr;
struct sockaddr_in ifra_dstaddr;
#define ifra_broadaddr ifra_dstaddr
struct sockaddr_in ifra_mask;
};
/*
* Given a pointer to an in_ifaddr (ifaddr),
* return a pointer to the addr as a sockaddr_in.
*/
#define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr))
#ifdef _KERNEL
TAILQ_HEAD(in_ifaddrhead, in_ifaddr);
extern struct in_ifaddrhead in_ifaddr;
extern struct ifqueue ipintrq; /* ip packet input queue */
extern int inetctlerrmap[];
void in_socktrim(struct sockaddr_in *);
/*
* 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; */ \
{ \
struct in_ifaddr *ia; \
\
for (ia = TAILQ_FIRST(&in_ifaddr); ia != TAILQ_END(&in_ifaddr) && \
ia->ia_addr.sin_addr.s_addr != (addr).s_addr; \
ia = TAILQ_NEXT(ia, ia_list)) \
continue; \
(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) = TAILQ_FIRST(&in_ifaddr); \
(ia) != TAILQ_END(&in_ifaddr) && (ia)->ia_ifp != (ifp); \
(ia) = TAILQ_NEXT((ia), ia_list)) \
continue; \
}
#endif
/*
* Per-interface router version information.
*/
struct router_info {
struct ifnet *rti_ifp;
int rti_type; /* type of router on this interface */
int rti_age; /* time since last v1 query */
struct router_info *rti_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 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 */
LIST_ENTRY(in_multi) inm_list; /* list of multicast addresses */
u_int inm_state; /* state of membership */
struct router_info *inm_rti; /* router version 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; */ \
{ \
struct in_ifaddr *ia; \
\
IFP_TO_IA((ifp), ia); \
if (ia == NULL) \
(inm) = NULL; \
else \
for ((inm) = LIST_FIRST(&ia->ia_multiaddrs); \
(inm) != LIST_END(&ia->ia_multiaddrs) && \
(inm)->inm_addr.s_addr != (addr).s_addr; \
(inm) = LIST_NEXT(inm, inm_list)) \
continue; \
}
/*
* 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 = LIST_NEXT((inm), inm_list); \
else \
while ((step).i_ia != NULL) { \
(inm) = LIST_FIRST(&(step).i_ia->ia_multiaddrs); \
(step).i_ia = TAILQ_NEXT((step).i_ia, ia_list); \
if ((inm) != NULL) { \
(step).i_inm = LIST_NEXT((inm), inm_list); \
break; \
} \
} \
}
#define IN_FIRST_MULTI(step, inm) \
/* struct in_multistep step; */ \
/* struct in_multi *inm; */ \
{ \
(step).i_ia = TAILQ_FIRST(&in_ifaddr); \
(step).i_inm = NULL; \
IN_NEXT_MULTI((step), (inm)); \
}
int in_ifinit(struct ifnet *,
struct in_ifaddr *, struct sockaddr_in *, int);
struct in_multi *in_addmulti(struct in_addr *, struct ifnet *);
void in_delmulti(struct in_multi *);
void in_ifscrub(struct ifnet *, struct in_ifaddr *);
int in_control(struct socket *, u_long, caddr_t, struct ifnet *);
#endif
/* INET6 stuff */
#include <netinet6/in6_var.h>
#endif /* _NETINET_IN_VAR_H_ */
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