[apple/xnu.git] / bsd / net / route.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1980, 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.
 *
 *	@(#)route.h	8.3 (Berkeley) 4/19/94
 * $FreeBSD: src/sys/net/route.h,v 1.36.2.1 2000/08/16 06:14:23 jayanth Exp $
 */

#ifndef _NET_ROUTE_H_
#define _NET_ROUTE_H_
#include <sys/appleapiopts.h>
#include <sys/types.h>
#include <sys/socket.h>

/*
 * Kernel resident routing tables.
 *
 * The routing tables are initialized when interface addresses
 * are set by making entries for all directly connected interfaces.
 */

/*
 * A route consists of a destination address and a reference
 * to a routing entry.  These are often held by protocols
 * in their control blocks, e.g. inpcb.
 */
#ifdef PRIVATE
struct  rtentry;
struct route {
	struct	rtentry *ro_rt;
	struct	sockaddr ro_dst;
	u_long	reserved[2];	/* for future use if needed */
};
#else
struct route;
#endif /* PRIVATE */

/*
 * These numbers are used by reliable protocols for determining
 * retransmission behavior and are included in the routing structure.
 */
struct rt_metrics {
	u_long	rmx_locks;	/* Kernel must leave these values alone */
	u_long	rmx_mtu;	/* MTU for this path */
	u_long	rmx_hopcount;	/* max hops expected */
	int32_t	rmx_expire;	/* lifetime for route, e.g. redirect */
	u_long	rmx_recvpipe;	/* inbound delay-bandwidth product */
	u_long	rmx_sendpipe;	/* outbound delay-bandwidth product */
	u_long	rmx_ssthresh;	/* outbound gateway buffer limit */
	u_long	rmx_rtt;	/* estimated round trip time */
	u_long	rmx_rttvar;	/* estimated rtt variance */
	u_long	rmx_pksent;	/* packets sent using this route */
	u_long	rmx_filler[4];	/* will be used for T/TCP later */
};

/*
 * rmx_rtt and rmx_rttvar are stored as microseconds;
 * RTTTOPRHZ(rtt) converts to a value suitable for use
 * by a protocol slowtimo counter.
 */
#define	RTM_RTTUNIT	1000000	/* units for rtt, rttvar, as units per sec */
#define	RTTTOPRHZ(r)	((r) / (RTM_RTTUNIT / PR_SLOWHZ))

/*
 * XXX kernel function pointer `rt_output' is visible to applications.
 */

/*
 * We distinguish between routes to hosts and routes to networks,
 * preferring the former if available.  For each route we infer
 * the interface to use from the gateway address supplied when
 * the route was entered.  Routes that forward packets through
 * gateways are marked so that the output routines know to address the
 * gateway rather than the ultimate destination.
 */
#ifdef PRIVATE
#ifndef RNF_NORMAL
#include <net/radix.h>
#endif
struct rtentry {
	struct	radix_node rt_nodes[2];	/* tree glue, and other values */
#define	rt_key(r)	((struct sockaddr *)((r)->rt_nodes->rn_key))
#define	rt_mask(r)	((struct sockaddr *)((r)->rt_nodes->rn_mask))
	struct	sockaddr *rt_gateway;	/* value */
	int32_t	rt_refcnt;		/* # held references */
	u_long	rt_flags;		/* up/down?, host/net */
	struct	ifnet *rt_ifp;		/* the answer: interface to use */
        u_long  rt_dlt;			/* DLIL dl_tag */
	struct	ifaddr *rt_ifa;		/* the answer: interface to use */
	struct	sockaddr *rt_genmask;	/* for generation of cloned routes */
	caddr_t	rt_llinfo;		/* pointer to link level info cache */
	struct	rt_metrics rt_rmx;	/* metrics used by rx'ing protocols */
	struct	rtentry *rt_gwroute;	/* implied entry for gatewayed routes */
	int	(*rt_output)(struct ifnet *, struct mbuf *,
				  struct sockaddr *, struct rtentry *);
					/* output routine for this (rt,if) */
	struct	rtentry *rt_parent; 	/* cloning parent of this route */
	u_long	generation_id;		/* route generation id */
};
#endif /* PRIVATE */

#ifdef __APPLE_API_OBSOLETE
/*
 * Following structure necessary for 4.3 compatibility;
 * We should eventually move it to a compat file.
 */
struct ortentry {
	u_long	rt_hash;		/* to speed lookups */
	struct	sockaddr rt_dst;	/* key */
	struct	sockaddr rt_gateway;	/* value */
	short	rt_flags;		/* up/down?, host/net */
	short	rt_refcnt;		/* # held references */
	u_long	rt_use;			/* raw # packets forwarded */
	struct	ifnet *rt_ifp;		/* the answer: interface to use */
};
#endif /* __APPLE_API_OBSOLETE */

#ifdef PRIVATE
#define rt_use rt_rmx.rmx_pksent
#endif /* PRIVATE */

#define	RTF_UP		0x1		/* route usable */
#define	RTF_GATEWAY	0x2		/* destination is a gateway */
#define	RTF_HOST	0x4		/* host entry (net otherwise) */
#define	RTF_REJECT	0x8		/* host or net unreachable */
#define	RTF_DYNAMIC	0x10		/* created dynamically (by redirect) */
#define	RTF_MODIFIED	0x20		/* modified dynamically (by redirect) */
#define RTF_DONE	0x40		/* message confirmed */
#define RTF_DELCLONE	0x80		/* delete cloned route */
#define RTF_CLONING	0x100		/* generate new routes on use */
#define RTF_XRESOLVE	0x200		/* external daemon resolves name */
#define RTF_LLINFO	0x400		/* generated by link layer (e.g. ARP) */
#define RTF_STATIC	0x800		/* manually added */
#define RTF_BLACKHOLE	0x1000		/* just discard pkts (during updates) */
#define RTF_PROTO2	0x4000		/* protocol specific routing flag */
#define RTF_PROTO1	0x8000		/* protocol specific routing flag */

#define RTF_PRCLONING	0x10000		/* protocol requires cloning */
#define RTF_WASCLONED	0x20000		/* route generated through cloning */
#define RTF_PROTO3	0x40000		/* protocol specific routing flag */
					/* 0x80000 unused */
#define RTF_PINNED	0x100000	/* future use */
#define	RTF_LOCAL	0x200000 	/* route represents a local address */
#define	RTF_BROADCAST	0x400000	/* route represents a bcast address */
#define	RTF_MULTICAST	0x800000	/* route represents a mcast address */
					/* 0x1000000 and up unassigned */

/*
 * Routing statistics.
 */
struct	rtstat {
	short	rts_badredirect;	/* bogus redirect calls */
	short	rts_dynamic;		/* routes created by redirects */
	short	rts_newgateway;		/* routes modified by redirects */
	short	rts_unreach;		/* lookups which failed */
	short	rts_wildcard;		/* lookups satisfied by a wildcard */
};

/*
 * Structures for routing messages.
 */
struct rt_msghdr {
	u_short	rtm_msglen;	/* to skip over non-understood messages */
	u_char	rtm_version;	/* future binary compatibility */
	u_char	rtm_type;	/* message type */
	u_short	rtm_index;	/* index for associated ifp */
	int	rtm_flags;	/* flags, incl. kern & message, e.g. DONE */
	int	rtm_addrs;	/* bitmask identifying sockaddrs in msg */
	pid_t   rtm_pid;	/* identify sender */
	int     rtm_seq;	/* for sender to identify action */
	int     rtm_errno;	/* why failed */
	int	rtm_use;	/* from rtentry */
	u_long	rtm_inits;	/* which metrics we are initializing */
	struct	rt_metrics rtm_rmx; /* metrics themselves */
};

struct rt_msghdr2 {
        u_short rtm_msglen;     /* to skip over non-understood messages */
        u_char  rtm_version;    /* future binary compatibility */
        u_char  rtm_type;       /* message type */
        u_short rtm_index;      /* index for associated ifp */
        int     rtm_flags;      /* flags, incl. kern & message, e.g. DONE */
        int     rtm_addrs;      /* bitmask identifying sockaddrs in msg */
	int32_t rtm_refcnt;         /* reference count */
	int     rtm_parentflags;      /* flags of the parent route */
        int     rtm_reserved;      /* reserved field set to 0 */
        int     rtm_use;        /* from rtentry */
        u_long  rtm_inits;      /* which metrics we are initializing */
        struct  rt_metrics rtm_rmx; /* metrics themselves */
};


#define RTM_VERSION	5	/* Up the ante and ignore older versions */

/*
 * Message types.
 */
#define RTM_ADD		0x1	/* Add Route */
#define RTM_DELETE	0x2	/* Delete Route */
#define RTM_CHANGE	0x3	/* Change Metrics or flags */
#define RTM_GET		0x4	/* Report Metrics */
#define RTM_LOSING	0x5	/* Kernel Suspects Partitioning */
#define RTM_REDIRECT	0x6	/* Told to use different route */
#define RTM_MISS	0x7	/* Lookup failed on this address */
#define RTM_LOCK	0x8	/* fix specified metrics */
#define RTM_OLDADD	0x9	/* caused by SIOCADDRT */
#define RTM_OLDDEL	0xa	/* caused by SIOCDELRT */
#define RTM_RESOLVE	0xb	/* req to resolve dst to LL addr */
#define RTM_NEWADDR	0xc	/* address being added to iface */
#define RTM_DELADDR	0xd	/* address being removed from iface */
#define RTM_IFINFO	0xe	/* iface going up/down etc. */
#define	RTM_NEWMADDR	0xf	/* mcast group membership being added to if */
#define	RTM_DELMADDR	0x10	/* mcast group membership being deleted */
#ifdef PRIVATE
#define RTM_GET_SILENT	0x11
#endif PRIVATE
#define RTM_IFINFO2	0x12	/* */
#define RTM_NEWMADDR2	0x13	/* */
#define RTM_GET2	0x14	/* */

/*
 * Bitmask values for rtm_inits and rmx_locks.
 */
#define RTV_MTU		0x1	/* init or lock _mtu */
#define RTV_HOPCOUNT	0x2	/* init or lock _hopcount */
#define RTV_EXPIRE	0x4	/* init or lock _expire */
#define RTV_RPIPE	0x8	/* init or lock _recvpipe */
#define RTV_SPIPE	0x10	/* init or lock _sendpipe */
#define RTV_SSTHRESH	0x20	/* init or lock _ssthresh */
#define RTV_RTT		0x40	/* init or lock _rtt */
#define RTV_RTTVAR	0x80	/* init or lock _rttvar */

/*
 * Bitmask values for rtm_addrs.
 */
#define RTA_DST		0x1	/* destination sockaddr present */
#define RTA_GATEWAY	0x2	/* gateway sockaddr present */
#define RTA_NETMASK	0x4	/* netmask sockaddr present */
#define RTA_GENMASK	0x8	/* cloning mask sockaddr present */
#define RTA_IFP		0x10	/* interface name sockaddr present */
#define RTA_IFA		0x20	/* interface addr sockaddr present */
#define RTA_AUTHOR	0x40	/* sockaddr for author of redirect */
#define RTA_BRD		0x80	/* for NEWADDR, broadcast or p-p dest addr */

/*
 * Index offsets for sockaddr array for alternate internal encoding.
 */
#define RTAX_DST	0	/* destination sockaddr present */
#define RTAX_GATEWAY	1	/* gateway sockaddr present */
#define RTAX_NETMASK	2	/* netmask sockaddr present */
#define RTAX_GENMASK	3	/* cloning mask sockaddr present */
#define RTAX_IFP	4	/* interface name sockaddr present */
#define RTAX_IFA	5	/* interface addr sockaddr present */
#define RTAX_AUTHOR	6	/* sockaddr for author of redirect */
#define RTAX_BRD	7	/* for NEWADDR, broadcast or p-p dest addr */
#define RTAX_MAX	8	/* size of array to allocate */

struct rt_addrinfo {
	int	rti_addrs;
	struct	sockaddr *rti_info[RTAX_MAX];
};

struct route_cb {
	int	ip_count;
	int	ip6_count;
	int	ipx_count;
	int	ns_count;
	int	iso_count;
	int	any_count;
};

#ifdef KERNEL_PRIVATE
#define RTFREE(rt)	rtfree(rt)
extern struct route_cb route_cb;
extern struct radix_node_head *rt_tables[AF_MAX+1];

struct ifmultiaddr;
struct proc;

void	 route_init(void);
void	 rt_ifmsg(struct ifnet *);
void	 rt_missmsg(int, struct rt_addrinfo *, int, int);
void	 rt_newaddrmsg(int, struct ifaddr *, int, struct rtentry *);
void	 rt_newmaddrmsg(int, struct ifmultiaddr *);
int	 rt_setgate(struct rtentry *, struct sockaddr *, struct sockaddr *);
void	 rtalloc(struct route *);
void	 rtalloc_ign(struct route *, u_long);
struct rtentry *
	 rtalloc1(struct sockaddr *, int, u_long);
struct rtentry *
	 rtalloc1_locked(const struct sockaddr *, int, u_long);
void	rtfree(struct rtentry *);
void	rtfree_locked(struct rtentry *);
void	rtref(struct rtentry *);
/*
 * rtunref will decrement the refcount, rtfree will decrement and free if
 * the refcount has reached zero and the route is not up.
 * Unless you have good reason to do otherwise, use rtfree.
 */
void	rtunref(struct rtentry *);
void	rtsetifa(struct rtentry *, struct ifaddr *);
int	 rtinit(struct ifaddr *, int, int);
int	 rtinit_locked(struct ifaddr *, int, int);
int	 rtioctl(int, caddr_t, struct proc *);
void	 rtredirect(struct sockaddr *, struct sockaddr *,
	    struct sockaddr *, int, struct sockaddr *, struct rtentry **);
int	 rtrequest(int, struct sockaddr *,
	    struct sockaddr *, struct sockaddr *, int, struct rtentry **);
int	 rtrequest_locked(int, struct sockaddr *,
	    struct sockaddr *, struct sockaddr *, int, struct rtentry **);
#endif KERNEL_PRIVATE

#endif
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
6601e61a	4	* @APPLE_LICENSE_HEADER_START@
1c79356b	5	*
6601e61a A	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
8f6c56a5	11	*
6601e61a A	12	* This Original Code and all software distributed under the License are
6601e61a A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
6601e61a A	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
8f6c56a5	19	*
6601e61a	20	* @APPLE_LICENSE_HEADER_END@
1c79356b A	21	*/
	22	/*
	23	* Copyright (c) 1980, 1986, 1993
	24	* The Regents of the University of California. All rights reserved.
	25	*
	26	* Redistribution and use in source and binary forms, with or without
	27	* modification, are permitted provided that the following conditions
	28	* are met:
	29	* 1. Redistributions of source code must retain the above copyright
	30	* notice, this list of conditions and the following disclaimer.
	31	* 2. Redistributions in binary form must reproduce the above copyright
	32	* notice, this list of conditions and the following disclaimer in the
	33	* documentation and/or other materials provided with the distribution.
	34	* 3. All advertising materials mentioning features or use of this software
	35	* must display the following acknowledgement:
	36	* This product includes software developed by the University of
	37	* California, Berkeley and its contributors.
	38	* 4. Neither the name of the University nor the names of its contributors
	39	* may be used to endorse or promote products derived from this software
	40	* without specific prior written permission.
	41	*
	42	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	43	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	44	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	45	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	46	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	47	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	48	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	49	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	50	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	51	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	52	* SUCH DAMAGE.
	53	*
	54	* @(#)route.h 8.3 (Berkeley) 4/19/94
9bccf70c	55	* $FreeBSD: src/sys/net/route.h,v 1.36.2.1 2000/08/16 06:14:23 jayanth Exp $
1c79356b A	56	*/
	57
	58	#ifndef _NET_ROUTE_H_
	59	#define _NET_ROUTE_H_
9bccf70c	60	#include <sys/appleapiopts.h>
91447636 A	61	#include <sys/types.h>
91447636 A	62	#include <sys/socket.h>
1c79356b A	63
	64	/*
	65	* Kernel resident routing tables.
	66	*
	67	* The routing tables are initialized when interface addresses
	68	* are set by making entries for all directly connected interfaces.
	69	*/
	70
	71	/*
	72	* A route consists of a destination address and a reference
	73	* to a routing entry. These are often held by protocols
	74	* in their control blocks, e.g. inpcb.
	75	*/
91447636 A	76	#ifdef PRIVATE
91447636 A	77	struct rtentry;
1c79356b A	78	struct route {
	79	struct rtentry *ro_rt;
	80	struct sockaddr ro_dst;
0b4e3aa0	81	u_long reserved[2]; /* for future use if needed */
1c79356b	82	};
9bccf70c A	83	#else
9bccf70c A	84	struct route;
91447636	85	#endif /* PRIVATE */
1c79356b A	86
	87	/*
	88	* These numbers are used by reliable protocols for determining
	89	* retransmission behavior and are included in the routing structure.
	90	*/
	91	struct rt_metrics {
	92	u_long rmx_locks; /* Kernel must leave these values alone */
	93	u_long rmx_mtu; /* MTU for this path */
	94	u_long rmx_hopcount; /* max hops expected */
91447636	95	int32_t rmx_expire; /* lifetime for route, e.g. redirect */
1c79356b A	96	u_long rmx_recvpipe; /* inbound delay-bandwidth product */
	97	u_long rmx_sendpipe; /* outbound delay-bandwidth product */
	98	u_long rmx_ssthresh; /* outbound gateway buffer limit */
	99	u_long rmx_rtt; /* estimated round trip time */
	100	u_long rmx_rttvar; /* estimated rtt variance */
	101	u_long rmx_pksent; /* packets sent using this route */
	102	u_long rmx_filler[4]; /* will be used for T/TCP later */
	103	};
	104
	105	/*
	106	* rmx_rtt and rmx_rttvar are stored as microseconds;
	107	* RTTTOPRHZ(rtt) converts to a value suitable for use
	108	* by a protocol slowtimo counter.
	109	*/
	110	#define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */
	111	#define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ))
	112
	113	/*
	114	* XXX kernel function pointer `rt_output' is visible to applications.
	115	*/
1c79356b A	116
	117	/*
	118	* We distinguish between routes to hosts and routes to networks,
	119	* preferring the former if available. For each route we infer
	120	* the interface to use from the gateway address supplied when
	121	* the route was entered. Routes that forward packets through
	122	* gateways are marked so that the output routines know to address the
	123	* gateway rather than the ultimate destination.
	124	*/
91447636	125	#ifdef PRIVATE
1c79356b A	126	#ifndef RNF_NORMAL
	127	#include <net/radix.h>
	128	#endif
	129	struct rtentry {
	130	struct radix_node rt_nodes[2]; /* tree glue, and other values */
	131	#define rt_key(r) ((struct sockaddr *)((r)->rt_nodes->rn_key))
	132	#define rt_mask(r) ((struct sockaddr *)((r)->rt_nodes->rn_mask))
	133	struct sockaddr rt_gateway; / value */
9bccf70c	134	int32_t rt_refcnt; /* # held references */
1c79356b A	135	u_long rt_flags; /* up/down?, host/net */
	136	struct ifnet rt_ifp; / the answer: interface to use */
	137	u_long rt_dlt; /* DLIL dl_tag */
	138	struct ifaddr rt_ifa; / the answer: interface to use */
	139	struct sockaddr rt_genmask; / for generation of cloned routes */
	140	caddr_t rt_llinfo; /* pointer to link level info cache */
	141	struct rt_metrics rt_rmx; /* metrics used by rx'ing protocols */
	142	struct rtentry rt_gwroute; / implied entry for gatewayed routes */
91447636 A	143	int (rt_output)(struct ifnet , struct mbuf *,
91447636 A	144	struct sockaddr , struct rtentry );
1c79356b A	145	/* output routine for this (rt,if) */
1c79356b A	146	struct rtentry rt_parent; / cloning parent of this route */
55e303ae	147	u_long generation_id; /* route generation id */
1c79356b	148	};
91447636	149	#endif /* PRIVATE */
1c79356b	150
91447636	151	#ifdef __APPLE_API_OBSOLETE
1c79356b A	152	/*
	153	* Following structure necessary for 4.3 compatibility;
	154	* We should eventually move it to a compat file.
	155	*/
	156	struct ortentry {
	157	u_long rt_hash; /* to speed lookups */
	158	struct sockaddr rt_dst; /* key */
	159	struct sockaddr rt_gateway; /* value */
	160	short rt_flags; /* up/down?, host/net */
	161	short rt_refcnt; /* # held references */
	162	u_long rt_use; /* raw # packets forwarded */
	163	struct ifnet rt_ifp; / the answer: interface to use */
	164	};
91447636	165	#endif /* __APPLE_API_OBSOLETE */
1c79356b	166
91447636	167	#ifdef PRIVATE
1c79356b	168	#define rt_use rt_rmx.rmx_pksent
91447636	169	#endif /* PRIVATE */
1c79356b A	170
	171	#define RTF_UP 0x1 /* route usable */
	172	#define RTF_GATEWAY 0x2 /* destination is a gateway */
	173	#define RTF_HOST 0x4 /* host entry (net otherwise) */
	174	#define RTF_REJECT 0x8 /* host or net unreachable */
	175	#define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */
	176	#define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */
	177	#define RTF_DONE 0x40 /* message confirmed */
9bccf70c	178	#define RTF_DELCLONE 0x80 /* delete cloned route */
1c79356b A	179	#define RTF_CLONING 0x100 /* generate new routes on use */
	180	#define RTF_XRESOLVE 0x200 /* external daemon resolves name */
	181	#define RTF_LLINFO 0x400 /* generated by link layer (e.g. ARP) */
	182	#define RTF_STATIC 0x800 /* manually added */
	183	#define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */
	184	#define RTF_PROTO2 0x4000 /* protocol specific routing flag */
	185	#define RTF_PROTO1 0x8000 /* protocol specific routing flag */
	186
	187	#define RTF_PRCLONING 0x10000 /* protocol requires cloning */
	188	#define RTF_WASCLONED 0x20000 /* route generated through cloning */
	189	#define RTF_PROTO3 0x40000 /* protocol specific routing flag */
91447636	190	/* 0x80000 unused */
1c79356b A	191	#define RTF_PINNED 0x100000 /* future use */
	192	#define RTF_LOCAL 0x200000 /* route represents a local address */
	193	#define RTF_BROADCAST 0x400000 /* route represents a bcast address */
	194	#define RTF_MULTICAST 0x800000 /* route represents a mcast address */
	195	/* 0x1000000 and up unassigned */
	196
	197	/*
	198	* Routing statistics.
	199	*/
	200	struct rtstat {
	201	short rts_badredirect; /* bogus redirect calls */
	202	short rts_dynamic; /* routes created by redirects */
	203	short rts_newgateway; /* routes modified by redirects */
	204	short rts_unreach; /* lookups which failed */
	205	short rts_wildcard; /* lookups satisfied by a wildcard */
	206	};
91447636	207
1c79356b A	208	/*
	209	* Structures for routing messages.
	210	*/
	211	struct rt_msghdr {
	212	u_short rtm_msglen; /* to skip over non-understood messages */
	213	u_char rtm_version; /* future binary compatibility */
	214	u_char rtm_type; /* message type */
	215	u_short rtm_index; /* index for associated ifp */
	216	int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
	217	int rtm_addrs; /* bitmask identifying sockaddrs in msg */
91447636 A	218	pid_t rtm_pid; /* identify sender */
	219	int rtm_seq; /* for sender to identify action */
	220	int rtm_errno; /* why failed */
1c79356b A	221	int rtm_use; /* from rtentry */
	222	u_long rtm_inits; /* which metrics we are initializing */
	223	struct rt_metrics rtm_rmx; /* metrics themselves */
	224	};
	225
91447636 A	226	struct rt_msghdr2 {
	227	u_short rtm_msglen; /* to skip over non-understood messages */
	228	u_char rtm_version; /* future binary compatibility */
	229	u_char rtm_type; /* message type */
	230	u_short rtm_index; /* index for associated ifp */
	231	int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
	232	int rtm_addrs; /* bitmask identifying sockaddrs in msg */
	233	int32_t rtm_refcnt; /* reference count */
	234	int rtm_parentflags; /* flags of the parent route */
	235	int rtm_reserved; /* reserved field set to 0 */
	236	int rtm_use; /* from rtentry */
	237	u_long rtm_inits; /* which metrics we are initializing */
	238	struct rt_metrics rtm_rmx; /* metrics themselves */
	239	};
	240
	241
1c79356b A	242	#define RTM_VERSION 5 /* Up the ante and ignore older versions */
	243
	244	/*
	245	* Message types.
	246	*/
	247	#define RTM_ADD 0x1 /* Add Route */
	248	#define RTM_DELETE 0x2 /* Delete Route */
	249	#define RTM_CHANGE 0x3 /* Change Metrics or flags */
	250	#define RTM_GET 0x4 /* Report Metrics */
	251	#define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */
	252	#define RTM_REDIRECT 0x6 /* Told to use different route */
	253	#define RTM_MISS 0x7 /* Lookup failed on this address */
	254	#define RTM_LOCK 0x8 /* fix specified metrics */
	255	#define RTM_OLDADD 0x9 /* caused by SIOCADDRT */
	256	#define RTM_OLDDEL 0xa /* caused by SIOCDELRT */
	257	#define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */
	258	#define RTM_NEWADDR 0xc /* address being added to iface */
	259	#define RTM_DELADDR 0xd /* address being removed from iface */
	260	#define RTM_IFINFO 0xe /* iface going up/down etc. */
	261	#define RTM_NEWMADDR 0xf /* mcast group membership being added to if */
	262	#define RTM_DELMADDR 0x10 /* mcast group membership being deleted */
91447636	263	#ifdef PRIVATE
55e303ae	264	#define RTM_GET_SILENT 0x11
91447636 A	265	#endif PRIVATE
	266	#define RTM_IFINFO2 0x12 /* */
	267	#define RTM_NEWMADDR2 0x13 /* */
	268	#define RTM_GET2 0x14 /* */
1c79356b A	269
	270	/*
	271	* Bitmask values for rtm_inits and rmx_locks.
	272	*/
	273	#define RTV_MTU 0x1 /* init or lock _mtu */
	274	#define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */
	275	#define RTV_EXPIRE 0x4 /* init or lock _expire */
	276	#define RTV_RPIPE 0x8 /* init or lock _recvpipe */
	277	#define RTV_SPIPE 0x10 /* init or lock _sendpipe */
	278	#define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */
	279	#define RTV_RTT 0x40 /* init or lock _rtt */
	280	#define RTV_RTTVAR 0x80 /* init or lock _rttvar */
	281
	282	/*
	283	* Bitmask values for rtm_addrs.
	284	*/
	285	#define RTA_DST 0x1 /* destination sockaddr present */
	286	#define RTA_GATEWAY 0x2 /* gateway sockaddr present */
	287	#define RTA_NETMASK 0x4 /* netmask sockaddr present */
	288	#define RTA_GENMASK 0x8 /* cloning mask sockaddr present */
	289	#define RTA_IFP 0x10 /* interface name sockaddr present */
	290	#define RTA_IFA 0x20 /* interface addr sockaddr present */
	291	#define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */
	292	#define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */
	293
	294	/*
	295	* Index offsets for sockaddr array for alternate internal encoding.
	296	*/
	297	#define RTAX_DST 0 /* destination sockaddr present */
	298	#define RTAX_GATEWAY 1 /* gateway sockaddr present */
	299	#define RTAX_NETMASK 2 /* netmask sockaddr present */
	300	#define RTAX_GENMASK 3 /* cloning mask sockaddr present */
	301	#define RTAX_IFP 4 /* interface name sockaddr present */
	302	#define RTAX_IFA 5 /* interface addr sockaddr present */
	303	#define RTAX_AUTHOR 6 /* sockaddr for author of redirect */
	304	#define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */
	305	#define RTAX_MAX 8 /* size of array to allocate */
	306
	307	struct rt_addrinfo {
	308	int rti_addrs;
	309	struct sockaddr *rti_info[RTAX_MAX];
	310	};
	311
	312	struct route_cb {
	313	int ip_count;
	314	int ip6_count;
	315	int ipx_count;
	316	int ns_count;
	317	int iso_count;
	318	int any_count;
	319	};
	320
91447636	321	#ifdef KERNEL_PRIVATE
9bccf70c	322	#define RTFREE(rt) rtfree(rt)
1c79356b A	323	extern struct route_cb route_cb;
	324	extern struct radix_node_head *rt_tables[AF_MAX+1];
	325
	326	struct ifmultiaddr;
	327	struct proc;
	328
91447636 A	329	void route_init(void);
	330	void rt_ifmsg(struct ifnet *);
	331	void rt_missmsg(int, struct rt_addrinfo *, int, int);
	332	void rt_newaddrmsg(int, struct ifaddr , int, struct rtentry );
	333	void rt_newmaddrmsg(int, struct ifmultiaddr *);
	334	int rt_setgate(struct rtentry , struct sockaddr , struct sockaddr *);
	335	void rtalloc(struct route *);
	336	void rtalloc_ign(struct route *, u_long);
	337	struct rtentry *
	338	rtalloc1(struct sockaddr *, int, u_long);
1c79356b	339	struct rtentry *
91447636 A	340	rtalloc1_locked(const struct sockaddr *, int, u_long);
	341	void rtfree(struct rtentry *);
	342	void rtfree_locked(struct rtentry *);
	343	void rtref(struct rtentry *);
9bccf70c A	344	/*
	345	* rtunref will decrement the refcount, rtfree will decrement and free if
	346	* the refcount has reached zero and the route is not up.
	347	* Unless you have good reason to do otherwise, use rtfree.
	348	*/
91447636 A	349	void rtunref(struct rtentry *);
	350	void rtsetifa(struct rtentry , struct ifaddr );
	351	int rtinit(struct ifaddr *, int, int);
	352	int rtinit_locked(struct ifaddr *, int, int);
	353	int rtioctl(int, caddr_t, struct proc *);
	354	void rtredirect(struct sockaddr , struct sockaddr ,
	355	struct sockaddr , int, struct sockaddr , struct rtentry **);
	356	int rtrequest(int, struct sockaddr *,
	357	struct sockaddr , struct sockaddr , int, struct rtentry **);
	358	int rtrequest_locked(int, struct sockaddr *,
	359	struct sockaddr , struct sockaddr , int, struct rtentry **);
	360	#endif KERNEL_PRIVATE
1c79356b A	361
1c79356b A	362	#endif