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- /* $Id: route.h,v 1.9 1993/06/04 11:16:15 jraja Exp $
- *
- * Copyright (c) 1993 AmiTCP/IP Group, <amitcp-group@hut.fi>,
- * Helsinki University of Technology, Finland.
- * All rights reserved.
- *
- * route.h --- Generic Routing Routines
- *
- * Last modified: Fri Jun 4 00:39:43 1993 jraja
- *
- * HISTORY
- * $Log: route.h,v $
- * Revision 1.9 1993/06/04 11:16:15 jraja
- * Fixes for first public release.
- *
- * Revision 1.8 1993/05/29 20:44:42 jraja
- * Removed obsolete definitions.
- *
- * Revision 1.7 1993/05/16 21:09:43 ppessi
- * RCS version changed.
- *
- * Revision 1.6 1993/05/03 10:26:28 jraja
- * Put some KERNEL specific definitions inside #ifdef KERNEL ... #endif
- *
- * Revision 1.5 93/05/02 17:32:02 17:32:02 jraja (Jarno Tapio Rajahalme)
- * Removed some obsolete definitions,
- * included protos from distinct proto file here.
- *
- * Revision 1.4 93/04/05 17:47:28 17:47:28 jraja (Jarno Tapio Rajahalme)
- * Commneted out #include <gateway.h> since every c-file includes
- * conf.h which contains the definition for GATEWAY.
- *
- * Revision 1.3 93/03/05 03:12:54 03:12:54 ppessi (Pekka Pessi)
- * Compiles with SASC. Initial test version
- *
- * Revision 1.2 93/02/25 16:50:25 16:50:25 jraja (Jarno Tapio Rajahalme)
- * added inclusion of route prototypes at the end of the file.
- *
- * Revision 1.1 92/11/20 14:59:28 14:59:28 jraja (Jarno Tapio Rajahalme)
- * Initial revision
- *
- *
- */
-
- /*
- * Mach Operating System
- * Copyright (c) 1992 Carnegie Mellon University
- * All Rights Reserved.
- *
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
- * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
- * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * Carnegie Mellon requests users of this software to return to
- *
- * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
- * School of Computer Science
- * Carnegie Mellon University
- * Pittsburgh PA 15213-3890
- *
- * any improvements or extensions that they make and grant Carnegie Mellon
- * the rights to redistribute these changes.
- */
- /*
- * HISTORY
- * Log: route.h,v
- * Revision 2.1 92/04/21 17:13:52 rwd
- * BSDSS
- *
- *
- */
-
- /*
- * 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.
- *
- * @(#)route.h 7.13 (Berkeley) 4/25/91
- */
-
- #ifndef NET_ROUTE_H
- #define NET_ROUTE_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.
- */
- struct route {
- struct rtentry *ro_rt;
- struct sockaddr ro_dst;
- };
-
- /*
- * 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 */
- };
-
- /*
- * 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))
-
- /*
- * 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 KERNEL
- #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 */
- 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 */
- 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 */
- short rt_idle; /* easy to tell llayer still live */
- };
- #endif /* KERNEL */
-
- /*
- * 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 */
- };
-
- #define RTF_UP 0x1 /* route useable */
- #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_PROTO2 0x4000 /* protocol specific routing flag */
- #define RTF_PROTO1 0x8000 /* protocol specific routing flag */
-
-
- /*
- * 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 compatability */
- u_char rtm_type; /* message type */
- u_short rtm_index; /* index for associated ifp */
- pid_t rtm_pid; /* identify sender */
- int rtm_addrs; /* bitmask identifying sockaddrs in msg */
- int rtm_seq; /* for sender to identify action */
- int rtm_errno; /* why failed */
- int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
- int rtm_use; /* from rtentry */
- u_long rtm_inits; /* which metrics we are initializing */
- struct rt_metrics rtm_rmx; /* metrics themselves */
- };
-
- struct route_cb {
- int ip_count;
- int ns_count;
- int iso_count;
- int any_count;
- };
- #define RTM_VERSION 2 /* 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 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 */
-
- #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 */
-
- #ifdef KERNEL
- extern struct route_cb route_cb;
-
- #define RTFREE(rt) \
- if ((rt)->rt_refcnt <= 1) \
- rtfree(rt); \
- else \
- (rt)->rt_refcnt--;
-
- extern struct rtstat rtstat;
-
- void rtinitheads(void);
- void rtalloc(struct route * ro);
- struct rtentry * rtalloc1(struct sockaddr * dst, int report);
- void rtfree(struct rtentry * rt);
- void rtredirect(struct sockaddr * dst, struct sockaddr * gateway,
- struct sockaddr * netmask, int flags,
- struct sockaddr * src, struct rtentry ** rtp);
- int rtioctl(int req, caddr_t data);
- struct ifaddr * ifa_ifwithroute(int flags, struct sockaddr * dst,
- struct sockaddr * gateway);
- int rtrequest(int req, struct sockaddr * dst, struct sockaddr * gateway,
- struct sockaddr * netmask, int flags, struct rtentry ** ret_nrt);
- void rt_maskedcopy(struct sockaddr * src, struct sockaddr * dst,
- struct sockaddr * netmask);
- int rtinit(struct ifaddr * ifa, int cmd, int flags);
-
- #endif /* KERNEL */
-
- #endif /* !NET_ROUTE_H */
-