291 lines
11 KiB
C
291 lines
11 KiB
C
/*
|
|
* 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 8.3 (Berkeley) 4/19/94
|
|
* $Id$
|
|
*/
|
|
|
|
#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-bandwidth product */
|
|
u_long rmx_sendpipe; /* outbound delay-bandwidth 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))
|
|
|
|
/*
|
|
* XXX kernel function pointer `rt_output' is visible to applications.
|
|
*/
|
|
struct mbuf;
|
|
|
|
/*
|
|
* 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_filler; /* was short flags field */
|
|
short rt_refcnt; /* # held references */
|
|
u_long rt_flags; /* up/down?, host/net */
|
|
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 */
|
|
int (*rt_output) __P((struct ifnet *, struct mbuf *,
|
|
struct sockaddr *, struct rtentry *));
|
|
/* output routine for this (rt,if) */
|
|
struct rtentry *rt_parent; /* cloning parent of this route */
|
|
void *rt_filler2; /* more filler */
|
|
};
|
|
|
|
/*
|
|
* 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 rt_use rt_rmx.rmx_pksent
|
|
|
|
#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 */
|
|
/* 0x80 unused */
|
|
#define RTF_CLONING 0x100 /* generate new routes on use */
|
|
#define RTF_XRESOLVE 0x200 /* external daemon resolves name */
|
|
#define RTF_LLINFO 0x400 /* generated by link layer (e.g. ARP) */
|
|
#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 */
|
|
|
|
#define RTF_PRCLONING 0x10000 /* protocol requires cloning */
|
|
#define RTF_WASCLONED 0x20000 /* route generated through cloning */
|
|
#define RTF_PROTO3 0x40000 /* protocol specific routing flag */
|
|
/* 0x80000 unused */
|
|
#define RTF_PINNED 0x100000 /* future use */
|
|
#define RTF_LOCAL 0x200000 /* route represents a local address */
|
|
#define RTF_BROADCAST 0x400000 /* route represents a bcast address */
|
|
#define RTF_MULTICAST 0x800000 /* route represents a mcast address */
|
|
/* 0x1000000 and up unassigned */
|
|
|
|
/*
|
|
* 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 */
|
|
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 */
|
|
struct rt_metrics rtm_rmx; /* metrics themselves */
|
|
};
|
|
|
|
#define RTM_VERSION 5 /* 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 RTM_NEWMADDR 0xf /* mcast group membership being added to if */
|
|
#define RTM_DELMADDR 0x10 /* mcast group membership being deleted */
|
|
|
|
#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 ipx_count;
|
|
int ns_count;
|
|
int iso_count;
|
|
int any_count;
|
|
};
|
|
|
|
#ifdef KERNEL
|
|
#define RTFREE(rt) \
|
|
if ((rt)->rt_refcnt <= 1) \
|
|
rtfree(rt); \
|
|
else \
|
|
(rt)->rt_refcnt--;
|
|
|
|
extern struct route_cb route_cb;
|
|
extern struct rtstat rtstat;
|
|
extern struct radix_node_head *rt_tables[AF_MAX+1];
|
|
|
|
/* forward declaration for rt_newmaddrmsg() */
|
|
struct ifmultiaddr;
|
|
|
|
void route_init __P((void));
|
|
void rt_ifmsg __P((struct ifnet *));
|
|
void rt_missmsg __P((int, struct rt_addrinfo *, int, int));
|
|
void rt_newaddrmsg __P((int, struct ifaddr *, int, struct rtentry *));
|
|
void rt_newmaddrmsg __P((int, struct ifmultiaddr *));
|
|
int rt_setgate __P((struct rtentry *,
|
|
struct sockaddr *, struct sockaddr *));
|
|
void rtalloc __P((struct route *));
|
|
void rtalloc_ign __P((struct route *, unsigned long));
|
|
struct rtentry *
|
|
rtalloc1 __P((struct sockaddr *, int, unsigned long));
|
|
void rtfree __P((struct rtentry *));
|
|
int rtinit __P((struct ifaddr *, int, int));
|
|
int rtioctl __P((int, caddr_t, struct proc *));
|
|
void rtredirect __P((struct sockaddr *, struct sockaddr *,
|
|
struct sockaddr *, int, struct sockaddr *, struct rtentry **));
|
|
int rtrequest __P((int, struct sockaddr *,
|
|
struct sockaddr *, struct sockaddr *, int, struct rtentry **));
|
|
#endif
|
|
|
|
#endif
|