1 #ifndef _NET_ROUTE_H_
    2 #define _NET_ROUTE_H_
    3 /*
    4  * Generic Routing Routines
    5  *
    6  * Copyright © 1994-2000 AmiTCP/IP Group,
    7  * Network Solutions Development, Inc.
    8  * All rights reserved.
    9  *
   10  * $Id: route.h,v 1.1.1.1 2005/03/15 16:00:46 laire Exp $
   11  */
   12 
   13 #include <sys/socket.h>
   14 
   15 #pragma pack(2)
   16 
   17 
   18 /*
   19  * These numbers are used by reliable protocols for determining
   20  * retransmission behavior and are included in the routing structure.
   21  */
   22 struct rt_metrics {
   23 	u_long	rmx_locks;	/* Kernel must leave these values alone */
   24 	u_long	rmx_mtu;	/* MTU for this path */
   25 	u_long	rmx_hopcount;	/* max hops expected */
   26 	u_long	rmx_expire;	/* lifetime for route, e.g. redirect */
   27 	u_long	rmx_recvpipe;	/* inbound delay-bandwith product */
   28 	u_long	rmx_sendpipe;	/* outbound delay-bandwith product */
   29 	u_long	rmx_ssthresh;	/* outbound gateway buffer limit */
   30 	u_long	rmx_rtt;	/* estimated round trip time */
   31 	u_long	rmx_rttvar;	/* estimated rtt variance */
   32 };
   33 
   34 /*
   35  * rmx_rtt and rmx_rttvar are stored as microseconds;
   36  * RTTTOPRHZ(rtt) converts to a value suitable for use
   37  * by a protocol slowtimo counter.
   38  */
   39 #define	RTM_RTTUNIT	1000000	/* units for rtt, rttvar, as units per sec */
   40 #define	RTTTOPRHZ(r)	((r) / (RTM_RTTUNIT / PR_SLOWHZ))
   41 
   42 #define	RTF_UP		0x1		/* route useable */
   43 #define	RTF_GATEWAY	0x2		/* destination is a gateway */
   44 #define	RTF_HOST	0x4		/* host entry (net otherwise) */
   45 #define	RTF_REJECT	0x8		/* host or net unreachable */
   46 #define	RTF_DYNAMIC	0x10		/* created dynamically (by redirect) */
   47 #define	RTF_MODIFIED	0x20		/* modified dynamically (by redirect) */
   48 #define RTF_DONE	0x40		/* message confirmed */
   49 #define RTF_MASK	0x80		/* subnet mask present */
   50 #define RTF_CLONING	0x100		/* generate new routes on use */
   51 #define RTF_XRESOLVE	0x200		/* external daemon resolves name */
   52 #define RTF_LLINFO	0x400		/* generated by ARP or ESIS */
   53 #define RTF_PROTO2	0x4000		/* protocol specific routing flag */
   54 #define RTF_PROTO1	0x8000		/* protocol specific routing flag */
   55 
   56 /*
   57  * Routing statistics.
   58  */
   59 struct	rtstat {
   60 	short	rts_badredirect;	/* bogus redirect calls */
   61 	short	rts_dynamic;		/* routes created by redirects */
   62 	short	rts_newgateway;		/* routes modified by redirects */
   63 	short	rts_unreach;		/* lookups which failed */
   64 	short	rts_wildcard;		/* lookups satisfied by a wildcard */
   65 };
   66 
   67 /*
   68  * Following structure necessary for 4.3 compatibility;
   69  * We should eventually move it to a compat file.
   70  */
   71 struct ortentry {
   72 	u_long	rt_hash;		/* to speed lookups */
   73 	struct	sockaddr rt_dst;	/* key */
   74 	struct	sockaddr rt_gateway;	/* value */
   75 	short	rt_flags;		/* up/down?, host/net */
   76 	short	rt_refcnt;		/* # held references */
   77 	u_long	rt_use;			/* raw # packets forwarded */
   78 #ifdef AMITCP
   79 	char    rt_pad[4];
   80 #else
   81 	struct	ifnet *rt_ifp;		/* the answer: interface to use */
   82 #endif
   83 };
   84 
   85 /*
   86  * Structures for routing messages.
   87  */
   88 struct rt_msghdr {
   89 	u_short	rtm_msglen;	/* to skip over non-understood messages */
   90 	u_char	rtm_version;	/* future binary compatability */
   91 	u_char	rtm_type;	/* message type */
   92 	u_short	rtm_index;	/* index for associated ifp */
   93 	pid_t	rtm_pid;	/* identify sender */
   94 	int	rtm_addrs;	/* bitmask identifying sockaddrs in msg */
   95 	int	rtm_seq;	/* for sender to identify action */
   96 	int	rtm_errno;	/* why failed */
   97 	int	rtm_flags;	/* flags, incl. kern & message, e.g. DONE */
   98 	int	rtm_use;	/* from rtentry */
   99 	u_long	rtm_inits;	/* which metrics we are initializing */
  100 	struct	rt_metrics rtm_rmx; /* metrics themselves */
  101 };
  102 
  103 struct route_cb {
  104 	int	ip_count;
  105 	int	ns_count;
  106 	int	iso_count;
  107 	int	any_count;
  108 };
  109 
  110 #define RTM_VERSION	2	/* Up the ante and ignore older versions */
  111 
  112 #define RTM_ADD		0x1	/* Add Route */
  113 #define RTM_DELETE	0x2	/* Delete Route */
  114 #define RTM_CHANGE	0x3	/* Change Metrics or flags */
  115 #define RTM_GET		0x4	/* Report Metrics */
  116 #define RTM_LOSING	0x5	/* Kernel Suspects Partitioning */
  117 #define RTM_REDIRECT	0x6	/* Told to use different route */
  118 #define RTM_MISS	0x7	/* Lookup failed on this address */
  119 #define RTM_LOCK	0x8	/* fix specified metrics */
  120 #define RTM_OLDADD	0x9	/* caused by SIOCADDRT */
  121 #define RTM_OLDDEL	0xa	/* caused by SIOCDELRT */
  122 #define RTM_RESOLVE	0xb	/* req to resolve dst to LL addr */
  123 
  124 #define RTV_MTU		0x1	/* init or lock _mtu */
  125 #define RTV_HOPCOUNT	0x2	/* init or lock _hopcount */
  126 #define RTV_EXPIRE	0x4	/* init or lock _hopcount */
  127 #define RTV_RPIPE	0x8	/* init or lock _recvpipe */
  128 #define RTV_SPIPE	0x10	/* init or lock _sendpipe */
  129 #define RTV_SSTHRESH	0x20	/* init or lock _ssthresh */
  130 #define RTV_RTT		0x40	/* init or lock _rtt */
  131 #define RTV_RTTVAR	0x80	/* init or lock _rttvar */
  132 
  133 #define RTA_DST		0x1	/* destination sockaddr present */
  134 #define RTA_GATEWAY	0x2	/* gateway sockaddr present */
  135 #define RTA_NETMASK	0x4	/* netmask sockaddr present */
  136 #define RTA_GENMASK	0x8	/* cloning mask sockaddr present */
  137 #define RTA_IFP		0x10	/* interface name sockaddr present */
  138 #define RTA_IFA		0x20	/* interface addr sockaddr present */
  139 #define RTA_AUTHOR	0x40	/* sockaddr for author of redirect */
  140 
  141 
  142 #pragma pack()
  143 
  144 #endif /* !_NET_ROUTE_H_ */