2 * © Portions copyright (c) 2007 Symbian Software Ltd. All rights reserved.
3 * Copyright (c) 1980, 1986, 1993
4 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)route.h 8.4 (Berkeley) 1/9/95
30 * $FreeBSD: src/sys/net/route.h,v 1.63 2005/01/07 01:45:35 imp Exp $
38 * Kernel resident routing tables.
40 * The routing tables are initialized when interface addresses
41 * are set by making entries for all directly connected interfaces.
45 * A route consists of a destination address and a reference
46 * to a routing entry. These are often held by protocols
47 * in their control blocks, e.g. inpcb.
50 struct rtentry *ro_rt;
51 struct sockaddr ro_dst;
53 #endif //__SYMBIAN32__
55 * These numbers are used by reliable protocols for determining
56 * retransmission behavior and are included in the routing structure.
58 struct rt_metrics_lite {
59 u_long rmx_mtu; /* MTU for this path */
60 u_long rmx_expire; /* lifetime for route, e.g. redirect */
61 u_long rmx_pksent; /* packets sent using this route */
65 u_long rmx_locks; /* Kernel must leave these values alone */
66 u_long rmx_mtu; /* MTU for this path */
67 u_long rmx_hopcount; /* max hops expected */
68 u_long rmx_expire; /* lifetime for route, e.g. redirect */
69 u_long rmx_recvpipe; /* inbound delay-bandwidth product */
70 u_long rmx_sendpipe; /* outbound delay-bandwidth product */
71 u_long rmx_ssthresh; /* outbound gateway buffer limit */
72 u_long rmx_rtt; /* estimated round trip time */
73 u_long rmx_rttvar; /* estimated rtt variance */
74 u_long rmx_pksent; /* packets sent using this route */
75 u_long rmx_filler[4]; /* will be used for T/TCP later */
79 * rmx_rtt and rmx_rttvar are stored as microseconds;
80 * RTTTOPRHZ(rtt) converts to a value suitable for use
81 * by a protocol slowtimo counter.
83 #define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */
84 #define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ))
87 * XXX kernel function pointer `rt_output' is visible to applications.
92 * We distinguish between routes to hosts and routes to networks,
93 * preferring the former if available. For each route we infer
94 * the interface to use from the gateway address supplied when
95 * the route was entered. Routes that forward packets through
96 * gateways are marked so that the output routines know to address the
97 * gateway rather than the ultimate destination.
100 #include <net/radix.h>
103 struct radix_node rt_nodes[2]; /* tree glue, and other values */
105 * XXX struct rtentry must begin with a struct radix_node (or two!)
106 * because the code does some casts of a 'struct radix_node *'
107 * to a 'struct rtentry *'
109 #define rt_key(r) (*((struct sockaddr **)(&(r)->rt_nodes->rn_key)))
110 #define rt_mask(r) (*((struct sockaddr **)(&(r)->rt_nodes->rn_mask)))
111 #ifndef __SYMBIAN32__
112 struct sockaddr *rt_gateway; /* value */
113 #endif //__SYMBIAN32__
114 u_long rt_flags; /* up/down?, host/net */
115 struct ifnet *rt_ifp; /* the answer: interface to use */
116 struct ifaddr *rt_ifa; /* the answer: interface address to use */
117 struct rt_metrics_lite rt_rmx; /* metrics used by rx'ing protocols */
118 long rt_refcnt; /* # held references */
119 #ifndef __SYMBIAN32__
120 struct sockaddr *rt_genmask; /* for generation of cloned routes */
122 caddr_t rt_llinfo; /* pointer to link level info cache */
123 struct rtentry *rt_gwroute; /* implied entry for gatewayed routes */
124 struct rtentry *rt_parent; /* cloning parent of this route */
126 /* XXX ugly, user apps use this definition but don't have a mtx def */
127 struct mtx rt_mtx; /* mutex for routing entry */
130 /*to be compatible with linux */
132 struct sockaddr rt_gateway; /* Gateway addr (RTF_GATEWAY). */
133 char *rt_dev; /* Forcing the device at add. */
134 struct sockaddr rt_genmask; /* Target network mask (IP). */
135 short int rt_metric; /* +1 for binary compatibility! */
136 struct sockaddr rt_dst; /* Target address. */
137 #endif //__SYMBIAN32__
140 #define RTF_UP 0x1 /* route usable */
141 #define RTF_GATEWAY 0x2 /* destination is a gateway */
142 #define RTF_HOST 0x4 /* host entry (net otherwise) */
143 #define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */
144 #define RTF_STATIC 0x800 /* manually added */
146 #ifndef __SYMBIAN32__
148 * Following structure necessary for 4.3 compatibility;
149 * We should eventually move it to a compat file.
152 u_long rt_hash; /* to speed lookups */
153 struct sockaddr rt_dst; /* key */
154 struct sockaddr rt_gateway; /* value */
155 short rt_flags; /* up/down?, host/net */
156 short rt_refcnt; /* # held references */
157 u_long rt_use; /* raw # packets forwarded */
158 struct ifnet *rt_ifp; /* the answer: interface to use */
161 #define rt_use rt_rmx.rmx_pksent
163 #define RTF_UP 0x1 /* route usable */
164 #define RTF_GATEWAY 0x2 /* destination is a gateway */
165 #define RTF_HOST 0x4 /* host entry (net otherwise) */
166 #define RTF_REJECT 0x8 /* host or net unreachable */
167 #define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */
168 #define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */
169 #define RTF_DONE 0x40 /* message confirmed */
170 /* 0x80 unused, was RTF_DELCLONE */
171 #define RTF_CLONING 0x100 /* generate new routes on use */
172 #define RTF_XRESOLVE 0x200 /* external daemon resolves name */
173 #define RTF_LLINFO 0x400 /* generated by link layer (e.g. ARP) */
174 #define RTF_STATIC 0x800 /* manually added */
175 #define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */
176 #define RTF_PROTO2 0x4000 /* protocol specific routing flag */
177 #define RTF_PROTO1 0x8000 /* protocol specific routing flag */
179 /* XXX: temporary to stay API/ABI compatible with userland */
181 #define RTF_PRCLONING 0x10000 /* unused, for compatibility */
184 #define RTF_WASCLONED 0x20000 /* route generated through cloning */
185 #define RTF_PROTO3 0x40000 /* protocol specific routing flag */
187 #define RTF_PINNED 0x100000 /* future use */
188 #define RTF_LOCAL 0x200000 /* route represents a local address */
189 #define RTF_BROADCAST 0x400000 /* route represents a bcast address */
190 #define RTF_MULTICAST 0x800000 /* route represents a mcast address */
191 /* 0x1000000 and up unassigned */
194 * Routing statistics.
197 short rts_badredirect; /* bogus redirect calls */
198 short rts_dynamic; /* routes created by redirects */
199 short rts_newgateway; /* routes modified by redirects */
200 short rts_unreach; /* lookups which failed */
201 short rts_wildcard; /* lookups satisfied by a wildcard */
204 * Structures for routing messages.
207 u_short rtm_msglen; /* to skip over non-understood messages */
208 u_char rtm_version; /* future binary compatibility */
209 u_char rtm_type; /* message type */
210 u_short rtm_index; /* index for associated ifp */
211 int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
212 int rtm_addrs; /* bitmask identifying sockaddrs in msg */
213 pid_t rtm_pid; /* identify sender */
214 int rtm_seq; /* for sender to identify action */
215 int rtm_errno; /* why failed */
216 int rtm_use; /* from rtentry */
217 u_long rtm_inits; /* which metrics we are initializing */
218 struct rt_metrics rtm_rmx; /* metrics themselves */
221 #define RTM_VERSION 5 /* Up the ante and ignore older versions */
226 #define RTM_ADD 0x1 /* Add Route */
227 #define RTM_DELETE 0x2 /* Delete Route */
228 #define RTM_CHANGE 0x3 /* Change Metrics or flags */
229 #define RTM_GET 0x4 /* Report Metrics */
230 #define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */
231 #define RTM_REDIRECT 0x6 /* Told to use different route */
232 #define RTM_MISS 0x7 /* Lookup failed on this address */
233 #define RTM_LOCK 0x8 /* fix specified metrics */
234 #define RTM_OLDADD 0x9 /* caused by SIOCADDRT */
235 #define RTM_OLDDEL 0xa /* caused by SIOCDELRT */
236 #define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */
237 #define RTM_NEWADDR 0xc /* address being added to iface */
238 #define RTM_DELADDR 0xd /* address being removed from iface */
239 #define RTM_IFINFO 0xe /* iface going up/down etc. */
240 #define RTM_NEWMADDR 0xf /* mcast group membership being added to if */
241 #define RTM_DELMADDR 0x10 /* mcast group membership being deleted */
242 #define RTM_IFANNOUNCE 0x11 /* iface arrival/departure */
243 #define RTM_IEEE80211 0x12 /* IEEE80211 wireless event */
246 * Bitmask values for rtm_inits and rmx_locks.
248 #define RTV_MTU 0x1 /* init or lock _mtu */
249 #define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */
250 #define RTV_EXPIRE 0x4 /* init or lock _expire */
251 #define RTV_RPIPE 0x8 /* init or lock _recvpipe */
252 #define RTV_SPIPE 0x10 /* init or lock _sendpipe */
253 #define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */
254 #define RTV_RTT 0x40 /* init or lock _rtt */
255 #define RTV_RTTVAR 0x80 /* init or lock _rttvar */
258 * Bitmask values for rtm_addrs.
260 #define RTA_DST 0x1 /* destination sockaddr present */
261 #define RTA_GATEWAY 0x2 /* gateway sockaddr present */
262 #define RTA_NETMASK 0x4 /* netmask sockaddr present */
263 #define RTA_GENMASK 0x8 /* cloning mask sockaddr present */
264 #define RTA_IFP 0x10 /* interface name sockaddr present */
265 #define RTA_IFA 0x20 /* interface addr sockaddr present */
266 #define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */
267 #define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */
270 * Index offsets for sockaddr array for alternate internal encoding.
272 #define RTAX_DST 0 /* destination sockaddr present */
273 #define RTAX_GATEWAY 1 /* gateway sockaddr present */
274 #define RTAX_NETMASK 2 /* netmask sockaddr present */
275 #define RTAX_GENMASK 3 /* cloning mask sockaddr present */
276 #define RTAX_IFP 4 /* interface name sockaddr present */
277 #define RTAX_IFA 5 /* interface addr sockaddr present */
278 #define RTAX_AUTHOR 6 /* sockaddr for author of redirect */
279 #define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */
280 #define RTAX_MAX 8 /* size of array to allocate */
284 struct sockaddr *rti_info[RTAX_MAX];
286 struct ifaddr *rti_ifa;
287 struct ifnet *rti_ifp;
291 * This macro returns the size of a struct sockaddr when passed
292 * through a routing socket. Basically we round up sa_len to
293 * a multiple of sizeof(long), with a minimum of sizeof(long).
294 * The check for a NULL pointer is just a convenience, probably never used.
295 * The case sa_len == 0 should only apply to empty structures.
297 #define SA_SIZE(sa) \
298 ( (!(sa) || ((struct sockaddr *)(sa))->sa_len == 0) ? \
300 1 + ( (((struct sockaddr *)(sa))->sa_len - 1) | (sizeof(long) - 1) ) )
304 #define RT_LOCK_INIT(_rt) \
305 mtx_init(&(_rt)->rt_mtx, "rtentry", NULL, MTX_DEF | MTX_DUPOK)
306 #define RT_LOCK(_rt) mtx_lock(&(_rt)->rt_mtx)
307 #define RT_UNLOCK(_rt) mtx_unlock(&(_rt)->rt_mtx)
308 #define RT_LOCK_DESTROY(_rt) mtx_destroy(&(_rt)->rt_mtx)
309 #define RT_LOCK_ASSERT(_rt) mtx_assert(&(_rt)->rt_mtx, MA_OWNED)
311 #define RT_ADDREF(_rt) do { \
312 RT_LOCK_ASSERT(_rt); \
313 KASSERT((_rt)->rt_refcnt >= 0, \
314 ("negative refcnt %ld", (_rt)->rt_refcnt)); \
315 (_rt)->rt_refcnt++; \
317 #define RT_REMREF(_rt) do { \
318 RT_LOCK_ASSERT(_rt); \
319 KASSERT((_rt)->rt_refcnt > 0, \
320 ("bogus refcnt %ld", (_rt)->rt_refcnt)); \
321 (_rt)->rt_refcnt--; \
324 #define RTFREE_LOCKED(_rt) do { \
325 if ((_rt)->rt_refcnt <= 1) \
331 /* guard against invalid refs */ \
334 #define RTFREE(_rt) do { \
336 RTFREE_LOCKED(_rt); \
339 extern struct radix_node_head *rt_tables[AF_MAX+1];
344 #endif //__SYMBIAN32__