/* Modified for emx by hv and em 1994,1996
 * Modified for gcc/os2 by bird 2003
 *
 * Copyright (c) 1980, 1986 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.
 *
 *	from: @(#)route.h	7.13 (Berkeley) 4/25/91
 *	$Id: route.h,v 1.3 1993/05/20 03:06:10 cgd Exp $
 */

#ifndef _NET_ROUTE_H_
#define _NET_ROUTE_H_

#include <net/if.h>

#if defined (__cplusplus)
extern "C" {
#endif

/*
 * 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.
 */
struct route {
	struct	rtentry *ro_rt;
	struct	sockaddr ro_dst;
};


#ifndef TCPV40HDRS
/*
 * 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 */
        u_long  rmx_expire;     /* lifetime for route, e.g. redirect */
        u_long  rmx_recvpipe;   /* inbound delay-bandwith product */
        u_long  rmx_sendpipe;   /* outbound delay-bandwith 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))
#endif /* !TCPV40HDRS */


/*
 * 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.
 *
 * Following structure necessary for 4.3 compatibility;
 */
#pragma pack(1)
#ifdef TCPV40HDRS
struct rtentry
#else
struct ortentry
#endif
{
	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 */
	long metric1,metric2,metric3,metric4; /*IBM special */
};
#pragma pack()

/* IBM: hv: I think this is the internal structure of the RT table of the
 * router daemon. Don't think it belongs here, but the toolkit has it as well
 */
#define RTENTRY_COUNT	512
#pragma pack(1)
struct rtentries {
	short	hostcount;
	short	netcount;
        #ifdef TCPV40HDRS
        struct rtentry  rttable[RTENTRY_COUNT];
        #else
        struct ortentry rttable[RTENTRY_COUNT];
        #endif
};
#pragma pack()


#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_MASK	0x80		/* subnet mask present */
#define RTF_CLONING	0x100		/* generate new routes on use */
#define RTF_XRESOLVE	0x200		/* external daemon resolves name */
#define RTF_LLINFO	0x400		/* generated by ARP or ESIS */
#define	RTF_STATIC	0x800		/* route manually added */
#define	RTF_BLACKHOLE	0x1000		/* discard packets during updates */
#ifndef TCPV40HDRS
#define RTF_LLTEMP      0x2000          /* manually added temporary arp entry */
#endif
#define RTF_PROTO2	0x4000		/* protocol specific routing flag */
#define RTF_PROTO1	0x8000		/* protocol specific routing flag */
#ifndef TCPV40HDRS
#define RTF_PRCLONING   0x10000         /* protocol requires cloning */
#define RTF_WASCLONED   0x20000         /* route generated through cloning */
#define RTF_PROTO3      0x40000         /* protocol specific routing flag */
#define RTF_CHAINDELETE 0x80000         /* chain is being deleted (internal) */
#define RTF_PINNED      0x100000        /* future use */
#define RTF_TUNNEL      0x200000        /* tunnelling bit */
#define RTF_CRYPT       0x400000        /* encrypting tunnel */
#define RTF_AUTH        0x800000        /* authenticating tunnel */
#endif


/*
 * 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 */
};
#ifndef TCPV40HDRS
/*
 * Structures for routing messages.
 */
#pragma pack(1)
struct rt_msghdr {
#define IFNAMSIZ        16
        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 */
        short   rtm_unit;       /* new field for subnet routing */
        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 */
        u_long  rtm_netmask;    /* new field for subnet routing */
        char    rtm_name[IFNAMSIZ]; /* new field for subnet routing */
        struct  rt_metrics rtm_rmx; /* metrics themselves */
};
#pragma pack()

#define RTM_VERSION     4       /* Up the ante and ignore older versions */

#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 RTV_MTU         0x1     /* init or lock _mtu */
#define RTV_HOPCOUNT    0x2     /* init or lock _hopcount */
#define RTV_EXPIRE      0x4     /* init or lock _hopcount */
#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_addr.
 */
#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     ns_count;
        int     iso_count;
        int     any_count;
};
#endif /* !TCPV40HDRS */

#if defined (__cplusplus)
}
#endif

#endif /* !_NET_ROUTE_H_ */
