/* $OpenBSD: route.h,v 1.19 2004/01/15 10:47:55 markus Exp $ */ /* $NetBSD: route.h,v 1.9 1996/02/13 22:00:49 christos Exp $ */ /* * 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. 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 */ #ifndef _NET_ROUTE_H_ #define _NET_ROUTE_H_ #include /* * 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 */ }; /* * 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. */ #ifndef RNF_NORMAL #include #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 */ u_int rt_flags; /* up/down?, host/net */ int 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 */ struct rtentry *rt_parent; /* If cloned, parent of this route. */ LIST_HEAD(, rttimer) rt_timer; /* queue of timeouts for misc funcs */ }; #define rt_use rt_rmx.rmx_pksent /* * 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_ouse; /* raw # packets forwarded (was: rt_use) */ 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_PROTO3 0x2000 /* protocol specific routing flag */ #define RTF_PROTO2 0x4000 /* protocol specific routing flag */ #define RTF_PROTO1 0x8000 /* protocol specific routing flag */ #define RTF_CLONED 0x10000 /* this is a cloned route */ #ifndef _KERNEL /* obsoleted */ #define RTF_TUNNEL 0x100000 /* Tunnelling bit. */ #endif /* * Routing statistics. */ struct rtstat { u_int32_t rts_badredirect; /* bogus redirect calls */ u_int32_t rts_dynamic; /* routes created by redirects */ u_int32_t rts_newgateway; /* routes modified by redirects */ u_int32_t rts_unreach; /* lookups which failed */ u_int32_t 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 3 /* 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_IFANNOUNCE 0xf /* iface arrival/departure */ #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]; int rti_flags; struct ifaddr *rti_ifa; struct ifnet *rti_ifp; struct rt_msghdr *rti_rtm; }; struct route_cb { int ip_count; int ip6_count; int ns_count; int iso_count; int any_count; }; /* * This structure, and the prototypes for the rt_timer_{init,remove_all, * add,timer} functions all used with the kind permission of BSDI. * These allow functions to be called for routes at specific times. */ struct rttimer { TAILQ_ENTRY(rttimer) rtt_next; /* entry on timer queue */ LIST_ENTRY(rttimer) rtt_link; /* multiple timers per rtentry */ struct rttimer_queue *rtt_queue;/* back pointer to queue */ struct rtentry *rtt_rt; /* Back pointer to the route */ void (*rtt_func)(struct rtentry *, struct rttimer *); time_t rtt_time; /* When this timer was registered */ }; struct rttimer_queue { long rtq_timeout; unsigned long rtq_count; TAILQ_HEAD(, rttimer) rtq_head; LIST_ENTRY(rttimer_queue) rtq_link; }; #ifdef _KERNEL #define RTFREE(rt) do { \ if ((rt)->rt_refcnt <= 1) \ rtfree(rt); \ else \ (rt)->rt_refcnt--; \ } while (0) /* * Values for additional argument to rtalloc_noclone() and rtalloc2() */ #define ALL_CLONING 0 #define ONNET_CLONING 1 #define NO_CLONING 2 extern struct route_cb route_cb; extern struct rtstat rtstat; extern struct radix_node_head *rt_tables[]; struct socket; void route_init(void); int route_output(struct mbuf *, ...); int route_usrreq(struct socket *, int, struct mbuf *, struct mbuf *, struct mbuf *); void rt_ifmsg(struct ifnet *); void rt_ifannouncemsg(struct ifnet *, int); void rt_maskedcopy(struct sockaddr *, struct sockaddr *, struct sockaddr *); void rt_missmsg(int, struct rt_addrinfo *, int, int); void rt_newaddrmsg(int, struct ifaddr *, int, struct rtentry *); int rt_setgate(struct rtentry *, struct sockaddr *, struct sockaddr *); void rt_setmetrics(u_long, struct rt_metrics *, struct rt_metrics *); int rt_timer_add(struct rtentry *, void(*)(struct rtentry *, struct rttimer *), struct rttimer_queue *); void rt_timer_init(void); struct rttimer_queue * rt_timer_queue_create(u_int); void rt_timer_queue_change(struct rttimer_queue *, long); void rt_timer_queue_destroy(struct rttimer_queue *, int); void rt_timer_remove_all(struct rtentry *); unsigned long rt_timer_count(struct rttimer_queue *); void rt_timer_timer(void *); void rtable_init(void **); void rtalloc(struct route *); struct rtentry * rtalloc1(struct sockaddr *, int); void rtalloc_noclone(struct route *, int); struct rtentry * rtalloc2(struct sockaddr *, int, int); void rtfree(struct rtentry *); int rt_getifa(struct rt_addrinfo *); int rtinit(struct ifaddr *, int, int); int rtioctl(u_long, caddr_t, struct proc *); void rtredirect(struct sockaddr *, struct sockaddr *, struct sockaddr *, int, struct sockaddr *, struct rtentry **); int rtrequest(int, struct sockaddr *, struct sockaddr *, struct sockaddr *, int, struct rtentry **); int rtrequest1(int, struct rt_addrinfo *, struct rtentry **); #endif /* _KERNEL */ #endif /* _NET_ROUTE_H_ */