| /* |
| * 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 8.4 (Berkeley) 1/9/95 |
| * $FreeBSD: src/sys/net/route.h,v 1.45 2002/03/24 09:34:04 bde Exp $ |
| */ |
| |
| #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 */ |
| long 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)(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, was RTF_DELCLONE */ |
| #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 */ |
| |
| /* |
| * Message types. |
| */ |
| #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 RTM_IFANNOUNCE 0x11 /* iface arrival/departure */ |
| |
| /* |
| * Bitmask values for rtm_inits and rmx_locks. |
| */ |
| #define RTV_MTU 0x1 /* init or lock _mtu */ |
| #define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */ |
| #define RTV_EXPIRE 0x4 /* init or lock _expire */ |
| #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_addrs. |
| */ |
| #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 route_cb { |
| int ip_count; |
| int ip6_count; |
| int ipx_count; |
| int ns_count; |
| int any_count; |
| }; |
| |
| #ifdef _KERNEL |
| #define RTFREE(rt) \ |
| do { \ |
| if ((rt)->rt_refcnt <= 1) \ |
| rtfree(rt); \ |
| else \ |
| (rt)->rt_refcnt--; \ |
| } while (0) |
| |
| extern struct route_cb route_cb; |
| extern struct radix_node_head *rt_tables[AF_MAX+1]; |
| |
| struct ifmultiaddr; |
| |
| void route_init(void); |
| int rt_getifa(struct rt_addrinfo *); |
| void rt_ifannouncemsg(struct ifnet *, int); |
| void rt_ifmsg(struct ifnet *); |
| void rt_missmsg(int, struct rt_addrinfo *, int, int); |
| void rt_newaddrmsg(int, struct ifaddr *, int, struct rtentry *); |
| void rt_newmaddrmsg(int, struct ifmultiaddr *); |
| int rt_setgate(struct rtentry *, struct sockaddr *, struct sockaddr *); |
| void rtalloc(struct route *); |
| void rtalloc_ign(struct route *, u_long); |
| struct rtentry * |
| rtalloc1(struct sockaddr *, int, u_long); |
| void rtfree(struct rtentry *); |
| int rtinit(struct ifaddr *, int, int); |
| int rtioctl(u_long, caddr_t); |
| 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 |
| |
| #endif |