xref: /titanic_51/usr/src/uts/common/net/route.h (revision a776e90690d98f629ab57f6493ff5949af9d65bd)
1 /*
2  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
3  * Use is subject to license terms.
4  */
5 /*
6  * Copyright (c) 1980, 1986, 1993
7  *	The Regents of the University of California.  All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 3. All advertising materials mentioning features or use of this software
18  *    must display the following acknowledgement:
19  *	This product includes software developed by the University of
20  *	California, Berkeley and its contributors.
21  * 4. Neither the name of the University nor the names of its contributors
22  *    may be used to endorse or promote products derived from this software
23  *    without specific prior written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35  * SUCH DAMAGE.
36  */
37 
38 /*
39  * Kernel resident routing tables.
40  *
41  * The routing tables are initialized when interface addresses
42  * are set by making entries for all directly connected interfaces.
43  */
44 
45 #ifndef	_NET_ROUTE_H
46 #define	_NET_ROUTE_H
47 
48 #pragma ident	"%Z%%M%	%I%	%E% SMI"
49 /* from UCB 8.5 (Berkeley) 2/8/95 */
50 
51 #include <sys/tsol/label.h>
52 #include <sys/tsol/label_macro.h>
53 
54 #ifdef	__cplusplus
55 extern "C" {
56 #endif
57 
58 /*
59  * A route consists of a destination address and a reference
60  * to a routing entry.  These are often held by protocols
61  * in their control blocks, e.g. inpcb.
62  */
63 struct route {
64 	struct	rtentry *ro_rt;
65 	struct	sockaddr ro_dst;
66 };
67 
68 /*
69  * These numbers are used by reliable protocols for determining
70  * retransmission behavior and are included in the routing structure.
71  *
72  * rmx_rtt and rmx_rttvar are stored as microseconds;
73  */
74 typedef struct rt_metrics {
75 	uint32_t	rmx_locks;	/* Kernel must leave these values */
76 					/* alone */
77 	uint32_t	rmx_mtu;	/* MTU for this path */
78 	uint32_t	rmx_hopcount;	/* max hops expected */
79 	uint32_t	rmx_expire;	/* lifetime for route, e.g. redirect */
80 	uint32_t	rmx_recvpipe;	/* inbound delay-bandwith product */
81 	uint32_t	rmx_sendpipe;	/* outbound delay-bandwith product */
82 	uint32_t	rmx_ssthresh;	/* outbound gateway buffer limit */
83 	uint32_t	rmx_rtt;	/* estimated round trip time */
84 	uint32_t	rmx_rttvar;	/* estimated rtt variance */
85 	uint32_t	rmx_pksent;	/* packets sent using this route */
86 } rt_metrics_t;
87 
88 /*
89  * OLD rtentry structure not used in the kernel. Instead the kernel
90  * uses struct ire defined in <inet/ip.h>.
91  *
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.
98  */
99 struct rtentry {
100 	uint_t	rt_hash;		/* to speed lookups */
101 	struct	sockaddr rt_dst;	/* key */
102 	struct	sockaddr rt_gateway;	/* value */
103 	short	rt_flags;		/* up/down?, host/net */
104 	short	rt_refcnt;		/* # held references */
105 	uint_t	rt_use;			/* raw # packets forwarded */
106 
107 /*
108  * The kernel does not use this field, and without it the structure is
109  * datamodel independent.
110  */
111 #if !defined(_KERNEL)
112 	struct	ifnet *rt_ifp;		/* the answer: interface to use */
113 #endif /* !defined(_KERNEL) */
114 };
115 
116 #define	RTF_UP		0x1		/* route usable */
117 #define	RTF_GATEWAY	0x2		/* destination is a gateway */
118 #define	RTF_HOST	0x4		/* host entry (net otherwise) */
119 #define	RTF_REJECT	0x8		/* host or net unreachable */
120 #define	RTF_DYNAMIC	0x10		/* created dynamically (by redirect) */
121 #define	RTF_MODIFIED	0x20		/* modified dynamically (by redirect) */
122 #define	RTF_DONE	0x40		/* message confirmed */
123 #define	RTF_MASK	0x80		/* subnet mask present */
124 #define	RTF_CLONING	0x100		/* generate new routes on use */
125 #define	RTF_XRESOLVE	0x200		/* external daemon resolves name */
126 #define	RTF_LLINFO	0x400		/* generated by ARP or ESIS */
127 #define	RTF_STATIC	0x800		/* manually added */
128 #define	RTF_BLACKHOLE	0x1000		/* just discard pkts (during updates) */
129 #define	RTF_PRIVATE	0x2000		/* do not advertise this route */
130 #define	RTF_PROTO2	0x4000		/* protocol specific routing flag */
131 #define	RTF_PROTO1	0x8000		/* protocol specific routing flag */
132 #define	RTF_MULTIRT	0x10000		/* multiroute */
133 #define	RTF_SETSRC	0x20000		/* set default outgoing src address */
134 
135 
136 /*
137  * OLD statistics not used by the kernel. The kernel uses <inet/mib2.h>.
138  *
139  * Routing statistics.
140  */
141 struct	rtstat {
142 	short	rts_badredirect;	/* bogus redirect calls */
143 	short	rts_dynamic;		/* routes created by redirects */
144 	short	rts_newgateway;		/* routes modified by redirects */
145 	short	rts_unreach;		/* lookups which failed */
146 	short	rts_wildcard;		/* lookups satisfied by a wildcard */
147 };
148 
149 /*
150  * Structures for routing messages.
151  */
152 typedef struct rt_msghdr {
153 	ushort_t rtm_msglen;	/* to skip over non-understood messages */
154 	uchar_t	rtm_version;	/* future binary compatibility */
155 	uchar_t	rtm_type;	/* message type */
156 	ushort_t rtm_index;	/* index for associated ifp */
157 	int	rtm_flags;	/* flags, incl. kern & message, e.g. DONE */
158 	int	rtm_addrs;	/* bitmask identifying sockaddrs in msg */
159 	pid_t	rtm_pid;	/* identify sender */
160 	int	rtm_seq;	/* for sender to identify action */
161 	int	rtm_errno;	/* why failed */
162 	int	rtm_use;	/* from rtentry */
163 	uint_t	rtm_inits;	/* which metrics we are initializing */
164 	struct	rt_metrics rtm_rmx; /* metrics themselves */
165 } rt_msghdr_t;
166 
167 #define	RTM_VERSION	3	/* Up the ante and ignore older versions */
168 
169 #define	RTM_ADD		0x1	/* Add Route */
170 #define	RTM_DELETE	0x2	/* Delete Route */
171 #define	RTM_CHANGE	0x3	/* Change Metrics or flags */
172 #define	RTM_GET		0x4	/* Report Metrics */
173 #define	RTM_LOSING	0x5	/* Kernel Suspects Partitioning */
174 #define	RTM_REDIRECT	0x6	/* Told to use different route */
175 #define	RTM_MISS	0x7	/* Lookup failed on this address */
176 #define	RTM_LOCK	0x8	/* fix specified metrics */
177 #define	RTM_OLDADD	0x9	/* caused by SIOCADDRT */
178 #define	RTM_OLDDEL	0xa	/* caused by SIOCDELRT */
179 #define	RTM_RESOLVE	0xb	/* req to resolve dst to LL addr */
180 #define	RTM_NEWADDR	0xc	/* address being added to iface */
181 #define	RTM_DELADDR	0xd	/* address being removed from iface */
182 #define	RTM_IFINFO	0xe	/* iface going up/down etc. */
183 
184 #define	RTV_MTU		0x1	/* init or lock _mtu */
185 #define	RTV_HOPCOUNT	0x2	/* init or lock _hopcount */
186 #define	RTV_EXPIRE	0x4	/* init or lock _expire */
187 #define	RTV_RPIPE	0x8	/* init or lock _recvpipe */
188 #define	RTV_SPIPE	0x10	/* init or lock _sendpipe */
189 #define	RTV_SSTHRESH	0x20	/* init or lock _ssthresh */
190 #define	RTV_RTT		0x40	/* init or lock _rtt */
191 #define	RTV_RTTVAR	0x80	/* init or lock _rttvar */
192 
193 /*
194  * Bitmask values for rtm_addr.
195  */
196 #define	RTA_DST		0x1	/* destination sockaddr present */
197 #define	RTA_GATEWAY	0x2	/* gateway sockaddr present */
198 #define	RTA_NETMASK	0x4	/* netmask sockaddr present */
199 #define	RTA_GENMASK	0x8	/* cloning mask sockaddr present */
200 #define	RTA_IFP		0x10	/* interface name sockaddr present */
201 #define	RTA_IFA		0x20	/* interface addr sockaddr present */
202 #define	RTA_AUTHOR	0x40	/* sockaddr for author of redirect */
203 #define	RTA_BRD		0x80	/* for NEWADDR, broadcast or p-p dest addr */
204 #define	RTA_SRC		0x100	/* source sockaddr present */
205 
206 #define	RTA_NUMBITS	9	/* Number of bits used in RTA_* */
207 
208 /*
209  * Index offsets for sockaddr_storage array for alternate internal encoding.
210  * There should be an RTAX_* associated with each RTA_*.
211  */
212 #define	RTAX_DST	0
213 #define	RTAX_GATEWAY	1
214 #define	RTAX_NETMASK	2
215 #define	RTAX_GENMASK	3
216 #define	RTAX_IFP	4
217 #define	RTAX_IFA	5
218 #define	RTAX_AUTHOR	6
219 #define	RTAX_BRD	7
220 #define	RTAX_SRC	8
221 #define	RTAX_MAX	RTA_NUMBITS	/* size of array to allocate */
222 
223 /*
224  * Routing socket message extension after sockaddrs.
225  */
226 typedef struct rtm_ext_s {
227 	uint32_t	rtmex_type;	/* identifier for type of extension */
228 	uint32_t	rtmex_len;	/* length of this extension */
229 } rtm_ext_t;
230 
231 #define	RTMEX_GATEWAY_SECATTR	1	/* extension is tsol_rtsecattr */
232 #define	RTMEX_MAX	RTMEX_GATEWAY_SECATTR
233 
234 /*
235  * Trusted Solaris route security attributes extension.
236  */
237 typedef struct rtsa_s {
238 	uint32_t	rtsa_mask;	/* see RTSA_* below */
239 	uint32_t	rtsa_doi;	/* domain of interpretation */
240 	brange_t	rtsa_slrange;	/* sensitivity label range */
241 } rtsa_t;
242 
243 typedef struct tsol_rtsecattr_s {
244 	uint32_t	rtsa_cnt;	/* number of attributes */
245 	rtsa_t		rtsa_attr[1];
246 } tsol_rtsecattr_t;
247 
248 #define	TSOL_RTSECATTR_SIZE(n) \
249 	(sizeof (tsol_rtsecattr_t) + (((n) - 1) * sizeof (struct rtsa_s)))
250 
251 #define	RTSA_MINSL	0x1	/* minimum sensitivity label is valid */
252 #define	RTSA_MAXSL	0x2	/* maximum sensitivity label is valid */
253 #define	RTSA_DOI	0x4	/* domain of interpretation is valid */
254 #define	RTSA_CIPSO	0x100	/* CIPSO protocol */
255 #define	RTSA_SLRANGE (RTSA_MINSL|RTSA_MAXSL)
256 
257 #ifdef	__cplusplus
258 }
259 #endif
260 
261 #endif	/* _NET_ROUTE_H */
262