0,0 → 1,236 |
/*!\file net/route.h |
* Route handling. |
*/ |
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/* $NetBSD: route.h,v 1.11 1997/04/02 21:17:29 christos Exp $ */ |
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/* |
* 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 8.5 (Berkeley) 2/8/95 |
*/ |
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#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 */ |
u_long rmx_pksent; /* packets sent using this route */ |
}; |
|
/* |
* 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)) |
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/* |
* 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. |
*/ |
#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 */ |
struct rtentry *rt_gwroute; /* implied entry for gatewayed routes */ |
}; |
|
/* |
* Following structure necessary for 4.3 compatibility; |
* We should eventually move it to a compat file. |
*/ |
struct ortentry { |
u_int32_t rt_hash; /* to speed lookups */ |
struct sockaddr rt_dst; /* key */ |
struct sockaddr rt_gateway; /* value */ |
int16_t rt_flags; /* up/down?, host/net */ |
int16_t rt_refcnt; /* # held references */ |
u_int32_t rt_use; /* raw # packets forwarded */ |
struct ifnet *rt_ifp; /* the answer: interface to use */ |
}; |
|
#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 /* 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 */ |
|
|
/* |
* 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 */ |
int 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 */ |
}; |
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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 */ |
#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. */ |
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#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 */ |
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/* |
* 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 */ |
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/* |
* 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 */ |
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struct rt_addrinfo { |
int rti_addrs; |
struct sockaddr *rti_info[RTAX_MAX]; |
}; |
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struct route_cb { |
int ip_count; |
int ns_count; |
int iso_count; |
int any_count; |
}; |
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#endif |