--- /dev/null
+/*!\file net/route.h
+ * Route handling.
+ */
+
+/* $NetBSD: route.h,v 1.11 1997/04/02 21:17:29 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. 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
+ */
+
+#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))
+
+/*
+ * 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 */
+};
+
+#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 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 ns_count;
+ int iso_count;
+ int any_count;
+};
+
+#endif
projects / oftp / blobdiff