summaryrefslogtreecommitdiffstats
path: root/include/protocols/routed.h
blob: b55b622507881efec04d476d1a9c881f1b8815e7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
/*-
 * Copyright (c) 1983, 1989, 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 acknowledgment:
 *	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.
 *
 *	@(#)routed.h	8.1 (Berkeley) 6/2/93
 *
 * $FreeBSD$
 *	$Revision: 2.26 $
 */

#ifndef _ROUTED_H_
#define	_ROUTED_H_
#ifdef __cplusplus
extern "C" {
#endif

/*
 * Routing Information Protocol
 *
 * Derived from Xerox NS Routing Information Protocol
 * by changing 32-bit net numbers to sockaddr's and
 * padding stuff to 32-bit boundaries.
 */

#define	RIPv1		1
#define	RIPv2		2
#ifndef RIPVERSION
#define	RIPVERSION	RIPv1
#endif

#define RIP_PORT	520

#if RIPVERSION == 1
/* Note that this so called sockaddr has a 2-byte sa_family and no sa_len.
 * It is not a UNIX sockaddr, but the shape of an address as defined
 * in RIPv1.  It is still defined to allow old versions of programs
 * such as `gated` to use this file to define RIPv1.
 */
struct netinfo {
	struct	sockaddr rip_dst;	/* destination net/host */
	u_int32_t   rip_metric;		/* cost of route */
};
#else
struct netinfo {
	u_int16_t   n_family;
#define	    RIP_AF_INET	    htons(AF_INET)
#define	    RIP_AF_UNSPEC   0
#define	    RIP_AF_AUTH	    0xffff
	u_int16_t   n_tag;		/* optional in RIPv2 */
	u_int32_t   n_dst;		/* destination net or host */
#define	    RIP_DEFAULT	    0
	u_int32_t   n_mask;		/* netmask in RIPv2 */
	u_int32_t   n_nhop;		/* optional next hop in RIPv2 */
	u_int32_t   n_metric;		/* cost of route */
};
#endif

/* RIPv2 authentication */
struct netauth {
	u_int16_t   a_family;		/* always RIP_AF_AUTH */
	u_int16_t   a_type;
#define	    RIP_AUTH_NONE   0
#define	    RIP_AUTH_PW	    htons(2)	/* password type */
#define	    RIP_AUTH_MD5    htons(3)	/* Keyed MD5 */
	union {
#define	    RIP_AUTH_PW_LEN 16
	    u_int8_t    au_pw[RIP_AUTH_PW_LEN];
	    struct a_md5 {
		int16_t	md5_pkt_len;	/* RIP-II packet length */
		int8_t	md5_keyid;	/* key ID and auth data len */
		int8_t	md5_auth_len;	/* 16 */
		u_int32_t md5_seqno;	/* sequence number */
		u_int32_t rsvd[2];	/* must be 0 */
#define	    RIP_AUTH_MD5_KEY_LEN   RIP_AUTH_PW_LEN
#define	    RIP_AUTH_MD5_HASH_XTRA (sizeof(struct netauth)-sizeof(struct a_md5))
#define	    RIP_AUTH_MD5_HASH_LEN  (RIP_AUTH_MD5_KEY_LEN+RIP_AUTH_MD5_HASH_XTRA)
	    } a_md5;
	} au;
};

struct rip {
	u_int8_t    rip_cmd;		/* request/response */
	u_int8_t    rip_vers;		/* protocol version # */
	u_int16_t   rip_res1;		/* pad to 32-bit boundary */
	union {				/* variable length... */
	    struct netinfo ru_nets[1];
	    int8_t    ru_tracefile[1];
	    struct netauth ru_auth[1];
	} ripun;
#define	rip_nets	ripun.ru_nets
#define rip_auths	ripun.ru_auth
#define	rip_tracefile	ripun.ru_tracefile
};

/* Packet types.
 */
#define	RIPCMD_REQUEST		1	/* want info */
#define	RIPCMD_RESPONSE		2	/* responding to request */
#define	RIPCMD_TRACEON		3	/* turn tracing on */
#define	RIPCMD_TRACEOFF		4	/* turn it off */

/* Gated extended RIP to include a "poll" command instead of using
 * RIPCMD_REQUEST with (RIP_AF_UNSPEC, RIP_DEFAULT).  RFC 1058 says
 * command 5 is used by Sun Microsystems for its own purposes.
 */
#define RIPCMD_POLL		5

#define	RIPCMD_MAX		6

#ifdef RIPCMDS
const char *ripcmds[RIPCMD_MAX] = {
	"#0", "REQUEST", "RESPONSE", "TRACEON", "TRACEOFF"
};
#endif

#define	HOPCNT_INFINITY		16
#define	MAXPACKETSIZE		512	/* max broadcast size */
#define NETS_LEN ((MAXPACKETSIZE-sizeof(struct rip))	\
		      / sizeof(struct netinfo) +1)

#define INADDR_RIP_GROUP (u_int32_t)0xe0000009	/* 224.0.0.9 */


/* Timer values used in managing the routing table.
 *
 * Complete tables are broadcast every SUPPLY_INTERVAL seconds.
 * If changes occur between updates, dynamic updates containing only changes
 * may be sent.  When these are sent, a timer is set for a random value
 * between MIN_WAITTIME and MAX_WAITTIME, and no additional dynamic updates
 * are sent until the timer expires.
 *
 * Every update of a routing entry forces an entry's timer to be reset.
 * After EXPIRE_TIME without updates, the entry is marked invalid,
 * but held onto until GARBAGE_TIME so that others may see it, to
 * "poison" the bad route.
 */
#define	SUPPLY_INTERVAL		30	/* time to supply tables */
#define	MIN_WAITTIME		2	/* min sec until next flash updates */
#define	MAX_WAITTIME		5	/* max sec until flash update */

#define STALE_TIME		90	/* switch to a new gateway */
#define	EXPIRE_TIME		180	/* time to mark entry invalid */
#define	GARBAGE_TIME		240	/* time to garbage collect */

#ifdef __cplusplus
}
#endif
#endif /* !_ROUTED_H_ */
OpenPOWER on IntegriCloud