[apple/xnu.git] / bsd / netinet / in_var.h

/*
 * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 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 1.33.2.2 2001/07/17 10:50:01 ru Exp $
 */

#ifndef _NETINET_IN_VAR_H_
#define _NETINET_IN_VAR_H_
#include <sys/appleapiopts.h>

#include <sys/queue.h>
#ifdef __APPLE__
#include <sys/kern_event.h>
#endif

#ifdef PRIVATE
#include <net/route.h>

/*
 * 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 */
	TAILQ_ENTRY(in_ifaddr)	ia_link;	/* tailq macro glue */
	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 */
};
#endif /* PRIVATE */

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;
	u_int32_t		ifra_unused;	/* not used: used to be 'dlt' */
};

/*
 * Event data, internet style.
 */
struct kev_in_data {
	struct net_event_data   link_data;
	struct in_addr  	ia_addr;
	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 */
	struct in_addr		ia_dstaddr;
};

struct kev_in_collision {
	struct net_event_data	link_data;	/* link colliding arp was received on */
	struct in_addr		ia_ipaddr;	/* IP address we and another node are using */
	u_char			hw_len;		/* length of hardware address */
	u_char			hw_addr[0];	/* variable length hardware address */
};

#ifdef __APPLE_API_PRIVATE
struct kev_in_portinuse {
	u_int16_t		port;		/* conflicting port number in host order */
	u_int32_t		req_pid;	/* PID port requestor */
	u_int32_t		reserved[2];	
};
#endif


/*
 * Define inet event subclass and specific inet events.
 */

#define KEV_INET_SUBCLASS 1

#define KEV_INET_NEW_ADDR     1
#define KEV_INET_CHANGED_ADDR 2
#define KEV_INET_ADDR_DELETED 3
#define KEV_INET_SIFDSTADDR   4
#define KEV_INET_SIFBRDADDR   5
#define KEV_INET_SIFNETMASK   6
#define KEV_INET_ARPCOLLISION 7	/* use kev_in_collision */

#ifdef __APPLE_API_PRIVATE
#define KEV_INET_PORTINUSE    8	/* use ken_in_portinuse */
#endif

#ifdef KERNEL_PRIVATE
/*
 * 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))

extern	TAILQ_HEAD(in_ifaddrhead, in_ifaddr) in_ifaddrhead;
extern	struct	ifqueue	ipintrq;		/* ip packet input queue */
extern	struct	in_addr zeroin_addr;
extern	u_char	inetctlerrmap[];
extern	lck_mtx_t *rt_mtx;

extern int apple_hwcksum_tx;
extern int apple_hwcksum_rx;

/*
 * 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; \
\
	lck_mtx_assert(rt_mtx, LCK_MTX_ASSERT_NOTOWNED); \
	lck_mtx_lock(rt_mtx); \
	TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) \
		if (IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) \
			break; \
	(ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \
	lck_mtx_unlock(rt_mtx); \
}

/*
 * 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; */ \
{ \
	lck_mtx_assert(rt_mtx, LCK_MTX_ASSERT_NOTOWNED); \
	lck_mtx_lock(rt_mtx); \
	for ((ia) = TAILQ_FIRST(&in_ifaddrhead); \
	    (ia) != NULL && (ia)->ia_ifp != (ifp); \
	    (ia) = TAILQ_NEXT((ia), ia_link)) \
		continue; \
	lck_mtx_unlock(rt_mtx); \
}

/*
 * 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.
 * For every entry on the interface's if_multiaddrs list which represents
 * an IP multicast group, there is one of these structures.  They are also
 * kept on a system-wide list to make it easier to keep our legacy IGMP code
 * compatible with the rest of the world (see IN_FIRST_MULTI et al, below).
 */
struct in_multi {
	LIST_ENTRY(in_multi) inm_link;	/* queue macro glue */
	struct	in_addr inm_addr;	/* IP multicast address, convenience */
	struct	ifnet *inm_ifp;		/* back pointer to ifnet */
	struct	ifmultiaddr *inm_ifma;	/* back pointer to ifmultiaddr */
	u_int	inm_timer;		/* IGMP membership report timer */
	u_int	inm_state;		/*  state of the membership */
	struct	router_info *inm_rti;	/* router info*/
};

#ifdef SYSCTL_DECL
SYSCTL_DECL(_net_inet_ip);
SYSCTL_DECL(_net_inet_raw);
#endif

extern LIST_HEAD(in_multihead, in_multi) in_multihead;

/*
 * Structure used by macros below to remember position when stepping through
 * all of the in_multi records.
 */
struct in_multistep {
	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" is set null.
 */
#define IN_LOOKUP_MULTI(addr, ifp, inm) \
	/* struct in_addr addr; */ \
	/* struct ifnet *ifp; */ \
	/* struct in_multi *inm; */ \
do { \
	struct ifmultiaddr *ifma; \
\
	LIST_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) { \
		if (ifma->ifma_addr->sa_family == AF_INET \
		    && ((struct sockaddr_in *)ifma->ifma_addr)->sin_addr.s_addr == \
		    (addr).s_addr) \
			break; \
	} \
	(inm) = ifma ? ifma->ifma_protospec : NULL; \
} while(0)

/*
 * 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; */ \
do { \
	if (((inm) = (step).i_inm) != NULL) \
		(step).i_inm = LIST_NEXT((step).i_inm, inm_link); \
} while(0)

#define IN_FIRST_MULTI(step, inm) \
	/* struct in_multistep step; */ \
	/* struct in_multi *inm; */ \
do { \
	(step).i_inm = LIST_FIRST(&in_multihead); \
	IN_NEXT_MULTI((step), (inm)); \
} while(0)

struct	route;
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 *,
			struct proc *);
void	in_rtqdrain(void);
extern struct radix_node *in_validate(struct radix_node *);
void	ip_input(struct mbuf *);
int	in_ifadown(struct ifaddr *ifa, int);
void	in_ifscrub(struct ifnet *, struct in_ifaddr *, int);
int	ipflow_fastforward(struct mbuf *);
void	ipflow_create(const struct route *, struct mbuf *);
void	ipflow_slowtimo(void);

#endif /* KERNEL_PRIVATE */

/* INET6 stuff */
#include <netinet6/in6_var.h>

#endif /* _NETINET_IN_VAR_H_ */
Commit	Line	Data
1c79356b	1	/*
c910b4d9	2	* Copyright (c) 2000-2008 Apple Inc. All rights reserved.
5d5c5d0d	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
8f6c56a5	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/*
	29	* Copyright (c) 1985, 1986, 1993
	30	* The Regents of the University of California. All rights reserved.
	31	*
	32	* Redistribution and use in source and binary forms, with or without
	33	* modification, are permitted provided that the following conditions
	34	* are met:
	35	* 1. Redistributions of source code must retain the above copyright
	36	* notice, this list of conditions and the following disclaimer.
	37	* 2. Redistributions in binary form must reproduce the above copyright
	38	* notice, this list of conditions and the following disclaimer in the
	39	* documentation and/or other materials provided with the distribution.
	40	* 3. All advertising materials mentioning features or use of this software
	41	* must display the following acknowledgement:
	42	* This product includes software developed by the University of
	43	* California, Berkeley and its contributors.
	44	* 4. Neither the name of the University nor the names of its contributors
	45	* may be used to endorse or promote products derived from this software
	46	* without specific prior written permission.
	47	*
	48	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	49	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	50	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	51	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	52	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	53	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	54	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	55	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	56	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	57	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	58	* SUCH DAMAGE.
	59	*
	60	* @(#)in_var.h 8.2 (Berkeley) 1/9/95
9bccf70c	61	* $FreeBSD: src/sys/netinet/in_var.h,v 1.33.2.2 2001/07/17 10:50:01 ru Exp $
1c79356b A	62	*/
	63
	64	#ifndef _NETINET_IN_VAR_H_
	65	#define _NETINET_IN_VAR_H_
9bccf70c	66	#include <sys/appleapiopts.h>
1c79356b A	67
1c79356b A	68	#include <sys/queue.h>
9bccf70c	69	#ifdef __APPLE__
1c79356b	70	#include <sys/kern_event.h>
9bccf70c A	71	#endif
9bccf70c A	72
91447636	73	#ifdef PRIVATE
2d21ac55	74	#include <net/route.h>
1c79356b A	75
	76	/*
	77	* Interface address, Internet version. One of these structures
	78	* is allocated for each Internet address on an interface.
	79	* The ifaddr structure contains the protocol-independent part
	80	* of the structure and is assumed to be first.
	81	*/
	82	struct in_ifaddr {
2d21ac55 A	83	struct ifaddr ia_ifa; /* protocol-independent info */
	84	#define ia_ifp ia_ifa.ifa_ifp
	85	#define ia_flags ia_ifa.ifa_flags
	86	/* ia_{,sub}net{,mask} in host order */
	87	u_long ia_net; /* network number of interface */
	88	u_long ia_netmask; /* mask of net part */
	89	u_long ia_subnet; /* subnet number, including net */
	90	u_long ia_subnetmask; /* mask of subnet part */
	91	struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
	92	TAILQ_ENTRY(in_ifaddr) ia_link; /* tailq macro glue */
	93	struct sockaddr_in ia_addr; /* reserve space for interface name */
	94	struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */
	95	#define ia_broadaddr ia_dstaddr
	96	struct sockaddr_in ia_sockmask; /* reserve space for general netmask */
1c79356b	97	};
91447636	98	#endif /* PRIVATE */
1c79356b A	99
1c79356b A	100	struct in_aliasreq {
2d21ac55 A	101	char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
	102	struct sockaddr_in ifra_addr;
	103	struct sockaddr_in ifra_broadaddr;
	104	#define ifra_dstaddr ifra_broadaddr
	105	struct sockaddr_in ifra_mask;
	106	u_int32_t ifra_unused; /* not used: used to be 'dlt' */
1c79356b A	107	};
1c79356b A	108
1c79356b A	109	/*
	110	* Event data, internet style.
	111	*/
1c79356b	112	struct kev_in_data {
55e303ae	113	struct net_event_data link_data;
2d21ac55 A	114	struct in_addr ia_addr;
	115	u_int32_t ia_net; /* network number of interface */
	116	u_int32_t ia_netmask; /* mask of net part */
	117	u_int32_t ia_subnet; /* subnet number, including net */
	118	u_int32_t ia_subnetmask; /* mask of subnet part */
	119	struct in_addr ia_netbroadcast;/* to recognize net broadcasts */
	120	struct in_addr ia_dstaddr;
1c79356b A	121	};
1c79356b A	122
90556fb8	123	struct kev_in_collision {
2d21ac55 A	124	struct net_event_data link_data; /* link colliding arp was received on */
	125	struct in_addr ia_ipaddr; /* IP address we and another node are using */
	126	u_char hw_len; /* length of hardware address */
	127	u_char hw_addr[0]; /* variable length hardware address */
	128	};
	129
	130	#ifdef __APPLE_API_PRIVATE
	131	struct kev_in_portinuse {
	132	u_int16_t port; /* conflicting port number in host order */
	133	u_int32_t req_pid; /* PID port requestor */
	134	u_int32_t reserved[2];
90556fb8	135	};
2d21ac55	136	#endif
90556fb8	137
1c79356b	138
1c79356b A	139	/*
	140	* Define inet event subclass and specific inet events.
	141	*/
	142
	143	#define KEV_INET_SUBCLASS 1
	144
	145	#define KEV_INET_NEW_ADDR 1
	146	#define KEV_INET_CHANGED_ADDR 2
	147	#define KEV_INET_ADDR_DELETED 3
	148	#define KEV_INET_SIFDSTADDR 4
	149	#define KEV_INET_SIFBRDADDR 5
	150	#define KEV_INET_SIFNETMASK 6
90556fb8	151	#define KEV_INET_ARPCOLLISION 7 /* use kev_in_collision */
1c79356b	152
2d21ac55 A	153	#ifdef __APPLE_API_PRIVATE
	154	#define KEV_INET_PORTINUSE 8 /* use ken_in_portinuse */
	155	#endif
	156
91447636	157	#ifdef KERNEL_PRIVATE
1c79356b A	158	/*
	159	* Given a pointer to an in_ifaddr (ifaddr),
	160	* return a pointer to the addr as a sockaddr_in.
	161	*/
	162	#define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr))
	163	#define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr))
	164
	165	#define IN_LNAOF(in, ifa) \
	166	((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask))
	167
1c79356b A	168	extern TAILQ_HEAD(in_ifaddrhead, in_ifaddr) in_ifaddrhead;
	169	extern struct ifqueue ipintrq; /* ip packet input queue */
	170	extern struct in_addr zeroin_addr;
	171	extern u_char inetctlerrmap[];
91447636	172	extern lck_mtx_t *rt_mtx;
1c79356b	173
2d21ac55 A	174	extern int apple_hwcksum_tx;
	175	extern int apple_hwcksum_rx;
	176
1c79356b A	177	/*
	178	* Macro for finding the interface (ifnet structure) corresponding to one
	179	* of our IP addresses.
	180	*/
	181	#define INADDR_TO_IFP(addr, ifp) \
	182	/* struct in_addr addr; */ \
	183	/* struct ifnet ifp; / \
	184	{ \
9bccf70c	185	struct in_ifaddr *ia; \
1c79356b	186	\
91447636 A	187	lck_mtx_assert(rt_mtx, LCK_MTX_ASSERT_NOTOWNED); \
91447636 A	188	lck_mtx_lock(rt_mtx); \
9bccf70c A	189	TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) \
	190	if (IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) \
	191	break; \
1c79356b	192	(ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \
91447636	193	lck_mtx_unlock(rt_mtx); \
1c79356b A	194	}
	195
	196	/*
	197	* Macro for finding the internet address structure (in_ifaddr) corresponding
	198	* to a given interface (ifnet structure).
	199	*/
	200	#define IFP_TO_IA(ifp, ia) \
	201	/* struct ifnet ifp; / \
	202	/* struct in_ifaddr ia; / \
	203	{ \
91447636 A	204	lck_mtx_assert(rt_mtx, LCK_MTX_ASSERT_NOTOWNED); \
91447636 A	205	lck_mtx_lock(rt_mtx); \
9bccf70c	206	for ((ia) = TAILQ_FIRST(&in_ifaddrhead); \
1c79356b	207	(ia) != NULL && (ia)->ia_ifp != (ifp); \
9bccf70c	208	(ia) = TAILQ_NEXT((ia), ia_link)) \
1c79356b	209	continue; \
91447636	210	lck_mtx_unlock(rt_mtx); \
1c79356b	211	}
1c79356b A	212
	213	/*
	214	* This information should be part of the ifnet structure but we don't wish
	215	* to change that - as it might break a number of things
	216	*/
	217
	218	struct router_info {
	219	struct ifnet *rti_ifp;
	220	int rti_type; /* type of router which is querier on this interface */
	221	int rti_time; /* # of slow timeouts since last old query */
	222	struct router_info *rti_next;
	223	};
	224
	225	/*
	226	* Internet multicast address structure. There is one of these for each IP
	227	* multicast group to which this host belongs on a given network interface.
	228	* For every entry on the interface's if_multiaddrs list which represents
	229	* an IP multicast group, there is one of these structures. They are also
	230	* kept on a system-wide list to make it easier to keep our legacy IGMP code
	231	* compatible with the rest of the world (see IN_FIRST_MULTI et al, below).
	232	*/
	233	struct in_multi {
	234	LIST_ENTRY(in_multi) inm_link; /* queue macro glue */
	235	struct in_addr inm_addr; /* IP multicast address, convenience */
	236	struct ifnet inm_ifp; / back pointer to ifnet */
	237	struct ifmultiaddr inm_ifma; / back pointer to ifmultiaddr */
	238	u_int inm_timer; /* IGMP membership report timer */
	239	u_int inm_state; /* state of the membership */
	240	struct router_info inm_rti; / router info*/
	241	};
1c79356b A	242
	243	#ifdef SYSCTL_DECL
	244	SYSCTL_DECL(_net_inet_ip);
	245	SYSCTL_DECL(_net_inet_raw);
	246	#endif
	247
	248	extern LIST_HEAD(in_multihead, in_multi) in_multihead;
	249
	250	/*
	251	* Structure used by macros below to remember position when stepping through
	252	* all of the in_multi records.
	253	*/
	254	struct in_multistep {
	255	struct in_multi *i_inm;
	256	};
	257
	258	/*
	259	* Macro for looking up the in_multi record for a given IP multicast address
	260	* on a given interface. If no matching record is found, "inm" is set null.
	261	*/
	262	#define IN_LOOKUP_MULTI(addr, ifp, inm) \
	263	/* struct in_addr addr; */ \
	264	/* struct ifnet ifp; / \
	265	/* struct in_multi inm; / \
	266	do { \
9bccf70c	267	struct ifmultiaddr *ifma; \
1c79356b	268	\
9bccf70c	269	LIST_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) { \
1c79356b A	270	if (ifma->ifma_addr->sa_family == AF_INET \
	271	&& ((struct sockaddr_in *)ifma->ifma_addr)->sin_addr.s_addr == \
	272	(addr).s_addr) \
	273	break; \
	274	} \
2d21ac55	275	(inm) = ifma ? ifma->ifma_protospec : NULL; \
1c79356b A	276	} while(0)
	277
	278	/*
	279	* Macro to step through all of the in_multi records, one at a time.
	280	* The current position is remembered in "step", which the caller must
	281	* provide. IN_FIRST_MULTI(), below, must be called to initialize "step"
	282	* and get the first record. Both macros return a NULL "inm" when there
	283	* are no remaining records.
	284	*/
	285	#define IN_NEXT_MULTI(step, inm) \
	286	/* struct in_multistep step; */ \
	287	/* struct in_multi inm; / \
	288	do { \
	289	if (((inm) = (step).i_inm) != NULL) \
9bccf70c	290	(step).i_inm = LIST_NEXT((step).i_inm, inm_link); \
1c79356b A	291	} while(0)
	292
	293	#define IN_FIRST_MULTI(step, inm) \
	294	/* struct in_multistep step; */ \
	295	/* struct in_multi inm; / \
	296	do { \
9bccf70c	297	(step).i_inm = LIST_FIRST(&in_multihead); \
1c79356b A	298	IN_NEXT_MULTI((step), (inm)); \
	299	} while(0)
	300
	301	struct route;
91447636 A	302	struct in_multi in_addmulti(struct in_addr , struct ifnet *);
	303	void in_delmulti(struct in_multi **);
	304	int in_control(struct socket , u_long, caddr_t, struct ifnet ,
	305	struct proc *);
	306	void in_rtqdrain(void);
c910b4d9	307	extern struct radix_node in_validate(struct radix_node );
91447636 A	308	void ip_input(struct mbuf *);
	309	int in_ifadown(struct ifaddr *ifa, int);
	310	void in_ifscrub(struct ifnet , struct in_ifaddr , int);
	311	int ipflow_fastforward(struct mbuf *);
	312	void ipflow_create(const struct route , struct mbuf );
	313	void ipflow_slowtimo(void);
1c79356b	314
91447636	315	#endif /* KERNEL_PRIVATE */
9bccf70c	316
1c79356b A	317	/* INET6 stuff */
1c79356b A	318	#include <netinet6/in6_var.h>
1c79356b A	319
1c79356b A	320	#endif /* _NETINET_IN_VAR_H_ */