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//==========================================================================
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//
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// include/net/route.h
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//
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//
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//
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//==========================================================================
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//####BSDCOPYRIGHTBEGIN####
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//
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// -------------------------------------------
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//
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// Portions of this software may have been derived from OpenBSD or other sources,
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// and are covered by the appropriate copyright disclaimers included herein.
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//
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// -------------------------------------------
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//
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//####BSDCOPYRIGHTEND####
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//==========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): gthomas
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// Contributors: gthomas
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// Date: 2000-01-10
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// Purpose:
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// Description:
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//
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//
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//####DESCRIPTIONEND####
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//
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//==========================================================================
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/* $OpenBSD: route.h,v 1.7 1999/12/08 06:50:18 itojun Exp $ */
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/* $NetBSD: route.h,v 1.9 1996/02/13 22:00:49 christos Exp $ */
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/*
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)route.h 8.3 (Berkeley) 4/19/94
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*/
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#ifndef _NET_ROUTE_H_
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#define _NET_ROUTE_H_
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#include <sys/queue.h>
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/*
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* Kernel resident routing tables.
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*
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* The routing tables are initialized when interface addresses
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* are set by making entries for all directly connected interfaces.
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*/
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/*
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* A route consists of a destination address and a reference
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* to a routing entry. These are often held by protocols
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* in their control blocks, e.g. inpcb.
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*/
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struct route {
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struct rtentry *ro_rt;
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struct sockaddr ro_dst;
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};
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/*
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* These numbers are used by reliable protocols for determining
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* retransmission behavior and are included in the routing structure.
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*/
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struct rt_metrics {
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u_long rmx_locks; /* Kernel must leave these values alone */
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u_long rmx_mtu; /* MTU for this path */
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u_long rmx_hopcount; /* max hops expected */
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u_long rmx_expire; /* lifetime for route, e.g. redirect */
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u_long rmx_recvpipe; /* inbound delay-bandwith product */
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u_long rmx_sendpipe; /* outbound delay-bandwith product */
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u_long rmx_ssthresh; /* outbound gateway buffer limit */
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u_long rmx_rtt; /* estimated round trip time */
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u_long rmx_rttvar; /* estimated rtt variance */
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u_long rmx_pksent; /* packets sent using this route */
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};
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/*
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* rmx_rtt and rmx_rttvar are stored as microseconds;
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* RTTTOPRHZ(rtt) converts to a value suitable for use
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* by a protocol slowtimo counter.
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*/
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#define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */
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#define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ))
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/*
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* We distinguish between routes to hosts and routes to networks,
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* preferring the former if available. For each route we infer
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* the interface to use from the gateway address supplied when
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* the route was entered. Routes that forward packets through
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* gateways are marked so that the output routines know to address the
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* gateway rather than the ultimate destination.
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*/
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#ifndef RNF_NORMAL
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#include <net/radix.h>
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#endif
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struct rtentry {
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struct radix_node rt_nodes[2]; /* tree glue, and other values */
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#define rt_key(r) ((struct sockaddr *)((r)->rt_nodes->rn_key))
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#define rt_mask(r) ((struct sockaddr *)((r)->rt_nodes->rn_mask))
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struct sockaddr *rt_gateway; /* value */
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u_int rt_flags; /* up/down?, host/net */
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short rt_refcnt; /* # held references */
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short rt_filler; /* XXX */
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u_long rt_use; /* raw # packets forwarded */
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struct ifnet *rt_ifp; /* the answer: interface to use */
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struct ifaddr *rt_ifa; /* the answer: interface to use */
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struct sockaddr *rt_genmask; /* for generation of cloned routes */
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caddr_t rt_llinfo; /* pointer to link level info cache */
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struct rt_metrics rt_rmx; /* metrics used by rx'ing protocols */
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struct rtentry *rt_gwroute; /* implied entry for gatewayed routes */
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struct rtentry *rt_parent; /* If cloned, parent of this route. */
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LIST_HEAD(, rttimer) rt_timer; /* queue of timeouts for misc funcs */
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};
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#define rt_use rt_rmx.rmx_pksent
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#ifdef __ECOS
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/*
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* This structure modelled after the Linux 'route' functions
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* Used by the SIOCADDRT and SIOCDELRT calls
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*/
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struct ecos_rtentry
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{
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struct sockaddr rt_dst; /* Target address. */
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struct sockaddr rt_gateway; /* Gateway addr (RTF_GATEWAY). */
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struct sockaddr rt_genmask; /* Target network mask (IP). */
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unsigned short int rt_flags;
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unsigned char rt_tos;
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unsigned char rt_class;
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short int rt_metric; /* +1 for binary compatibility! */
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char *rt_dev; /* Forcing the device at add. */
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unsigned long int rt_mtu; /* Per route MTU/Window. */
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unsigned long int rt_window; /* Window clamping. */
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unsigned short int rt_irtt; /* Initial RTT. */
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};
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/* Compatibility hack. */
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#define rt_mss rt_mtu
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#endif
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/*
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* Following structure necessary for 4.3 compatibility;
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* We should eventually move it to a compat file.
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*/
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struct ortentry {
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u_int32_t rt_hash; /* to speed lookups */
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struct sockaddr rt_dst; /* key */
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struct sockaddr rt_gateway; /* value */
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int16_t rt_flags; /* up/down?, host/net */
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int16_t rt_refcnt; /* # held references */
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u_int32_t rt_ouse; /* raw # packets forwarded (was: rt_use) */
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struct ifnet *rt_ifp; /* the answer: interface to use */
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};
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#define RTF_UP 0x1 /* route usable */
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#define RTF_GATEWAY 0x2 /* destination is a gateway */
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#define RTF_HOST 0x4 /* host entry (net otherwise) */
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#define RTF_REJECT 0x8 /* host or net unreachable */
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#define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */
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#define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */
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#define RTF_DONE 0x40 /* message confirmed */
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#define RTF_MASK 0x80 /* subnet mask present */
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#define RTF_CLONING 0x100 /* generate new routes on use */
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#define RTF_XRESOLVE 0x200 /* external daemon resolves name */
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#define RTF_LLINFO 0x400 /* generated by ARP or ESIS */
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#define RTF_STATIC 0x800 /* manually added */
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#define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */
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#define RTF_PROTO3 0x2000 /* protocol specific routing flag */
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#define RTF_PROTO2 0x4000 /* protocol specific routing flag */
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#define RTF_PROTO1 0x8000 /* protocol specific routing flag */
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/*
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* New IPv6 routing flags.
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*
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* PROTO1 and PROTO2 are used, and defined in netinet6/ipv6_var.h.
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*/
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#define RTF_TUNNEL 0x100000 /* Tunnelling bit. */
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/*
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* Routing statistics.
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*/
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struct rtstat {
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u_int32_t rts_badredirect; /* bogus redirect calls */
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u_int32_t rts_dynamic; /* routes created by redirects */
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u_int32_t rts_newgateway; /* routes modified by redirects */
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u_int32_t rts_unreach; /* lookups which failed */
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u_int32_t rts_wildcard; /* lookups satisfied by a wildcard */
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};
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/*
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* Structures for routing messages.
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*/
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struct rt_msghdr {
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u_short rtm_msglen; /* to skip over non-understood messages */
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u_char rtm_version; /* future binary compatibility */
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u_char rtm_type; /* message type */
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u_short rtm_index; /* index for associated ifp */
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int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
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int rtm_addrs; /* bitmask identifying sockaddrs in msg */
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pid_t rtm_pid; /* identify sender */
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int rtm_seq; /* for sender to identify action */
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int rtm_errno; /* why failed */
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int rtm_use; /* from rtentry */
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u_long rtm_inits; /* which metrics we are initializing */
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struct rt_metrics rtm_rmx; /* metrics themselves */
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};
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#define RTM_VERSION 3 /* Up the ante and ignore older versions */
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#define RTM_ADD 0x1 /* Add Route */
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#define RTM_DELETE 0x2 /* Delete Route */
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#define RTM_CHANGE 0x3 /* Change Metrics or flags */
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#define RTM_GET 0x4 /* Report Metrics */
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#define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */
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#define RTM_REDIRECT 0x6 /* Told to use different route */
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#define RTM_MISS 0x7 /* Lookup failed on this address */
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#define RTM_LOCK 0x8 /* fix specified metrics */
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#define RTM_OLDADD 0x9 /* caused by SIOCADDRT */
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#define RTM_OLDDEL 0xa /* caused by SIOCDELRT */
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#define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */
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#define RTM_NEWADDR 0xc /* address being added to iface */
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#define RTM_DELADDR 0xd /* address being removed from iface */
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| 254 |
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#define RTM_IFINFO 0xe /* iface going up/down etc. */
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| 256 |
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#define RTV_MTU 0x1 /* init or lock _mtu */
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| 257 |
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#define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */
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| 258 |
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#define RTV_EXPIRE 0x4 /* init or lock _hopcount */
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| 259 |
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#define RTV_RPIPE 0x8 /* init or lock _recvpipe */
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| 260 |
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#define RTV_SPIPE 0x10 /* init or lock _sendpipe */
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| 261 |
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#define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */
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| 262 |
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#define RTV_RTT 0x40 /* init or lock _rtt */
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| 263 |
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#define RTV_RTTVAR 0x80 /* init or lock _rttvar */
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| 264 |
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| 265 |
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/*
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| 266 |
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* Bitmask values for rtm_addr.
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| 267 |
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*/
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| 268 |
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#define RTA_DST 0x1 /* destination sockaddr present */
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| 269 |
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#define RTA_GATEWAY 0x2 /* gateway sockaddr present */
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| 270 |
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#define RTA_NETMASK 0x4 /* netmask sockaddr present */
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#define RTA_GENMASK 0x8 /* cloning mask sockaddr present */
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| 272 |
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#define RTA_IFP 0x10 /* interface name sockaddr present */
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| 273 |
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#define RTA_IFA 0x20 /* interface addr sockaddr present */
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| 274 |
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#define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */
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| 275 |
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#define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */
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| 276 |
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| 277 |
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/*
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| 278 |
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* Index offsets for sockaddr array for alternate internal encoding.
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| 279 |
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*/
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| 280 |
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#define RTAX_DST 0 /* destination sockaddr present */
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| 281 |
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#define RTAX_GATEWAY 1 /* gateway sockaddr present */
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| 282 |
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#define RTAX_NETMASK 2 /* netmask sockaddr present */
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| 283 |
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#define RTAX_GENMASK 3 /* cloning mask sockaddr present */
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| 284 |
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#define RTAX_IFP 4 /* interface name sockaddr present */
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| 285 |
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#define RTAX_IFA 5 /* interface addr sockaddr present */
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| 286 |
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#define RTAX_AUTHOR 6 /* sockaddr for author of redirect */
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| 287 |
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#define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */
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| 288 |
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#define RTAX_MAX 8 /* size of array to allocate */
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| 289 |
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| 290 |
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struct rt_addrinfo {
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| 291 |
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int rti_addrs;
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| 292 |
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struct sockaddr *rti_info[RTAX_MAX];
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| 293 |
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};
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| 294 |
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| 295 |
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struct route_cb {
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| 296 |
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int ip_count;
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| 297 |
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int ip6_count;
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| 298 |
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int ns_count;
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| 299 |
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int iso_count;
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| 300 |
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int any_count;
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| 301 |
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};
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| 302 |
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| 303 |
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/*
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| 304 |
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* This structure, and the prototypes for the rt_timer_{init,remove_all,
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| 305 |
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|
* add,timer} functions all used with the kind permission of BSDI.
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| 306 |
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* These allow functions to be called for routes at specific times.
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| 307 |
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*/
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| 308 |
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| 309 |
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struct rttimer {
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| 310 |
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|
TAILQ_ENTRY(rttimer) rtt_next; /* entry on timer queue */
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| 311 |
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|
LIST_ENTRY(rttimer) rtt_link; /* multiple timers per rtentry */
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| 312 |
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struct rttimer_queue *rtt_queue;/* back pointer to queue */
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| 313 |
|
|
struct rtentry *rtt_rt; /* Back pointer to the route */
|
| 314 |
|
|
void (*rtt_func) __P((struct rtentry *,
|
| 315 |
|
|
struct rttimer *));
|
| 316 |
|
|
time_t rtt_time; /* When this timer was registered */
|
| 317 |
|
|
};
|
| 318 |
|
|
|
| 319 |
|
|
struct rttimer_queue {
|
| 320 |
|
|
long rtq_timeout;
|
| 321 |
|
|
TAILQ_HEAD(, rttimer) rtq_head;
|
| 322 |
|
|
LIST_ENTRY(rttimer_queue) rtq_link;
|
| 323 |
|
|
};
|
| 324 |
|
|
|
| 325 |
|
|
#ifdef _KERNEL
|
| 326 |
|
|
#define RTFREE(rt) do { \
|
| 327 |
|
|
if ((rt)->rt_refcnt <= 1) \
|
| 328 |
|
|
rtfree(rt); \
|
| 329 |
|
|
else \
|
| 330 |
|
|
(rt)->rt_refcnt--; \
|
| 331 |
|
|
} while (0)
|
| 332 |
|
|
|
| 333 |
|
|
/*
|
| 334 |
|
|
* Values for additional argument to rtalloc_noclone() and rtalloc2()
|
| 335 |
|
|
*/
|
| 336 |
|
|
#define ALL_CLONING 0
|
| 337 |
|
|
#define ONNET_CLONING 1
|
| 338 |
|
|
#define NO_CLONING 2
|
| 339 |
|
|
|
| 340 |
|
|
struct route_cb route_cb;
|
| 341 |
|
|
struct rtstat rtstat;
|
| 342 |
|
|
struct radix_node_head *rt_tables[AF_MAX+1];
|
| 343 |
|
|
|
| 344 |
|
|
struct socket;
|
| 345 |
|
|
void route_init __P((void));
|
| 346 |
|
|
int route_output __P((struct mbuf *, ...));
|
| 347 |
|
|
int route_usrreq __P((struct socket *, int, struct mbuf *,
|
| 348 |
|
|
struct mbuf *, struct mbuf *));
|
| 349 |
|
|
void rt_ifmsg __P((struct ifnet *));
|
| 350 |
|
|
void rt_maskedcopy __P((struct sockaddr *,
|
| 351 |
|
|
struct sockaddr *, struct sockaddr *));
|
| 352 |
|
|
void rt_missmsg __P((int, struct rt_addrinfo *, int, int));
|
| 353 |
|
|
void rt_newaddrmsg __P((int, struct ifaddr *, int, struct rtentry *));
|
| 354 |
|
|
int rt_setgate __P((struct rtentry *, struct sockaddr *,
|
| 355 |
|
|
struct sockaddr *));
|
| 356 |
|
|
void rt_setmetrics __P((u_long, struct rt_metrics *, struct rt_metrics *));
|
| 357 |
|
|
int rt_timer_add __P((struct rtentry *,
|
| 358 |
|
|
void(*)(struct rtentry *, struct rttimer *),
|
| 359 |
|
|
struct rttimer_queue *));
|
| 360 |
|
|
void rt_timer_init __P((void));
|
| 361 |
|
|
struct rttimer_queue *
|
| 362 |
|
|
rt_timer_queue_create __P((u_int));
|
| 363 |
|
|
void rt_timer_queue_change __P((struct rttimer_queue *, long));
|
| 364 |
|
|
void rt_timer_queue_destroy __P((struct rttimer_queue *, int));
|
| 365 |
|
|
void rt_timer_remove_all __P((struct rtentry *));
|
| 366 |
|
|
void rt_timer_timer __P((void *));
|
| 367 |
|
|
void rtable_init __P((void **));
|
| 368 |
|
|
void rtalloc __P((struct route *));
|
| 369 |
|
|
struct rtentry *
|
| 370 |
|
|
rtalloc1 __P((struct sockaddr *, int));
|
| 371 |
|
|
void rtalloc_noclone __P((struct route *, int));
|
| 372 |
|
|
struct rtentry *
|
| 373 |
|
|
rtalloc2 __P((struct sockaddr *, int, int));
|
| 374 |
|
|
void rtfree __P((struct rtentry *));
|
| 375 |
|
|
int rtinit __P((struct ifaddr *, int, int));
|
| 376 |
|
|
int rtioctl __P((u_long, caddr_t, struct proc *));
|
| 377 |
|
|
void rtredirect __P((struct sockaddr *, struct sockaddr *,
|
| 378 |
|
|
struct sockaddr *, int, struct sockaddr *,
|
| 379 |
|
|
struct rtentry **));
|
| 380 |
|
|
int rtrequest __P((int, struct sockaddr *,
|
| 381 |
|
|
struct sockaddr *, struct sockaddr *, int,
|
| 382 |
|
|
struct rtentry **));
|
| 383 |
|
|
void ipv4_tunnelsetup __P((struct rtentry *));
|
| 384 |
|
|
#endif /* _KERNEL */
|
| 385 |
|
|
|
| 386 |
|
|
#endif // _NET_ROUTE_H_
|
