route.h
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上传日期:2008-05-12
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文件大小:13k
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VxWorks
开发平台:
C/C++
- /* route.h - routing table header file */
- /* Copyright 1984 - 2001 Wind River Systems, Inc. */
- /*
- * 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
- */
- /*
- modification history
- --------------------
- 01g,10oct01,rae merge from truestack (ROUTER_STACK additions)
- 01f,07jul97,rjc revised rt_metrics structure to gain 6 bytes.
- 01e,02jul97,vin added declarations for rtxxMsgHooks removed unnessary global
- declarations
- 01d,01jul97,rjc restored old rtentry structure
- 01c,12feb97,rjc ospf changes.
- 01b,05feb97,rjc tos routing changes.
- 01a,03mar96,vin created from BSD4.4 stuff,integrated with 02i.
- */
- #ifndef __INCrouteh
- #define __INCrouteh
- #ifdef __cplusplus
- extern "C" {
- #endif
- #include "net/socketvar.h"
- #include "net/radix.h"
- #include "net/mbuf.h"
- #if ((CPU_FAMILY==I960) && (defined __GNUC__))
- #pragma align 1 /* tell gcc960 not to optimize alignments */
- #endif /* CPU_FAMILY==I960 */
- /*
- * 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_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_short rmx_hopcount; /* max hops expected */
- u_short rmx_mss; /* TCP maximum segment size from peer */
- /* Additional WRN metrics for routing protocols */
- long value1;
- long value2;
- long value3;
- long value4;
- long value5;
- long routeTag;
- u_char weight;
- };
- /*
- * This expanded "gateway" structure contains the address of the next-hop
- * router and all the new metrics for a route, as well as the protocol
- * identifier which created it. The RTM_GETALL routing socket message
- * contains a list of these structures.
- */
- struct sockaddr_gate
- {
- u_char gate_len;
- u_char gate_family;
- u_char routeProto;
- u_char weight;
- u_long gate_addr;
- long value1;
- long value2;
- long value3;
- long value4;
- long value5;
- long routeTag;
- };
- /*
- * 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 <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 rtentry *rt_gwroute; /* implied entry for gatewayed routes */
- int rt_mod; /* last modified XXX */
- struct rt_metrics rt_rmx; /* metrics used by rx'ing protocols */
- struct rtentry *rt_parent; /* parent of route (if cloned) */
- };
- /*
- * 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 */
- int rt_mod; /* last modified */
- };
- #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 */
- #define RTF_MGMT 0x2000 /* modfied by managment proto */
- #define RTF_REP_NODE 0x4000 /* Representative Node in the Pat tree */
- #define RTF_CLONED RTF_PROTO1 /* Child route holding path MTU results */
- #define RTF_DELETE RTF_PROTO2 /* Unused route scheduled for deletion */
- /* 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 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. */
- #ifdef ROUTER_STACK
- /* New WRN messages */
- #define RTM_ADDEXTRA 0xf /* Report creation of duplicate route */
- #define RTM_DELEXTRA 0x10 /* Report deletion of duplicate route */
- #define RTM_NEWCHANGE 0x11 /* Change gateway of duplicate route */
- #define RTM_NEWGET 0x12 /* Find any route with gateway */
- #define RTM_GETALL 0x13 /* Get IP route to dst and any duplicates */
- #define RTM_NEWIPROUTE 0x14 /* Replacement for deleted primary IP route */
- #define RTM_OLDIPROUTE 0x15 /* Demoted IP route replaced with new entry */
- #endif /* ROUTER_STACK */
- #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 */
- #ifdef ROUTER_STACK
- /* New flag values for additional metrics */
- #define RTV_VALUE1 0x100 /* assign or lock first additional metric */
- #define RTV_VALUE2 0x200 /* assign or lock second additional metric */
- #define RTV_VALUE3 0x400 /* assign or lock third additional metric */
- #define RTV_VALUE4 0x800 /* assign or lock fourth additional metric */
- #define RTV_VALUE5 0x1000 /* assign or lock fifth additional metric */
- #define RTV_ROUTETAG 0x2000 /* assign or lock route tag value */
- #define RTV_WEIGHT 0x4000 /* assign or lock administrative weight */
- #endif /* ROUTER_STACK */
- /*
- * 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 ns_count;
- int iso_count;
- int any_count;
- };
- #if ((CPU_FAMILY==I960) && (defined __GNUC__))
- #pragma align 0 /* turn off alignment requirement */
- #endif /* CPU_FAMILY==I960 */
- #define RTFREE(rt)
- if ((rt)->rt_refcnt <= 1)
- rtfree(rt);
- else
- (rt)->rt_refcnt--;
- extern struct rtstat rtstat;
- extern struct radix_node_head *rt_tables[];
- extern int rtmodified;
- #ifdef VIRTUAL_STACK
- STATUS routeStorageCreate (void);
- #else
- int route_init (void);
- #endif
- void rt_maskedcopy (struct sockaddr *,
- struct sockaddr *, struct sockaddr *);
- int rt_setgate (struct rtentry *,
- struct sockaddr *, struct sockaddr *);
- void rtable_init (void **);
- void rtalloc (struct route *);
- struct rtentry *
- rtalloc1 (struct sockaddr *, int);
- void rtfree (struct rtentry *);
- int rtinit (struct ifaddr *, int, int);
- int rtioctl (int, caddr_t);
- int rtredirect (struct sockaddr *, struct sockaddr *,
- struct sockaddr *, int, struct sockaddr *, struct rtentry **);
- int rtrequest (int, struct sockaddr *,
- struct sockaddr *, struct sockaddr *, int, struct rtentry **);
- #ifdef __cplusplus
- }
- #endif
- #endif /* __INCrouteh */