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/* $Id */
/*
* 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.
* 4. 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 8.2 (Berkeley) 1/9/95
* $FreeBSD: src/sys/netinet/in_var.h,v 1.52 2004/10/19 21:06:14 andre Exp $
*/
#ifndef _NETINET_IN_VAR_H_
#define _NETINET_IN_VAR_H_
#include <sys/queue.h>
#if !defined(__rtems__)
#include <sys/fnv_hash.h>
#endif
/*
* Interface address, Internet version. One of these structures
* is allocated for each Internet address on an interface.
* 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_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 subnet part */
struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
struct in_ifaddr *ia_next; /* next in 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_multihead, in_multi) ia_multiaddrs;
/* list of multicast addresses */
};
struct in_aliasreq {
char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
struct sockaddr_in ifra_addr;
struct sockaddr_in ifra_broadaddr;
#define ifra_dstaddr ifra_broadaddr
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))
#define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr))
#define IN_LNAOF(in, ifa) \
((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask))
#ifdef _KERNEL
extern struct in_ifaddr *in_ifaddr;
extern struct ifqueue ipintrq; /* ip packet input queue */
extern struct in_addr zeroin_addr;
extern u_char inetctlerrmap[];
/*
* 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->ia_ifp->if_flags & IFF_POINTOPOINT)? \
IA_DSTSIN(ia):IA_SIN(ia))->sin_addr.s_addr != (addr).s_addr; \
ia = ia->ia_next) \
continue; \
if (ia == NULL) \
for (ia = in_ifaddr; \
ia != NULL; \
ia = ia->ia_next) \
if (ia->ia_ifp->if_flags & IFF_POINTOPOINT && \
IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) \
break; \
(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) \
continue; \
}
#endif
/*
* 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 *rti_ifp;
int rti_type; /* type of router which is querier on this interface */
int rti_time; /* # of slow timeouts since last old 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 {
LIST_ENTRY(in_multi) inm_entry; /* list glue */
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 */
u_int inm_state; /* state of the membership */
struct router_info *inm_rti; /* router info*/
};
#ifdef _KERNEL
#ifdef SYSCTL_DECL
SYSCTL_DECL(_net_inet_ip);
SYSCTL_DECL(_net_inet_raw);
#endif
/*
* 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.lh_first; \
(inm) != NULL && (inm)->inm_addr.s_addr != (addr).s_addr; \
(inm) = inm->inm_entry.le_next) \
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 = (inm)->inm_entry.le_next; \
else \
while ((step).i_ia != NULL) { \
(inm) = (step).i_ia->ia_multiaddrs.lh_first; \
(step).i_ia = (step).i_ia->ia_next; \
if ((inm) != NULL) { \
(step).i_inm = (inm)->inm_entry.le_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(struct in_addr *, struct ifnet *);
void in_delmulti(struct in_multi *);
int in_control(struct socket *, u_long, caddr_t, struct ifnet *);
void in_rtqdrain(void);
void ip_input(struct mbuf *);
#endif /* _KERNEL */
#endif /* _NETINET_IN_VAR_H_ */
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