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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
|
/*
* IS-IS Rout(e)ing protocol - isis_tlv.h
* IS-IS TLV related routines
*
* Copyright (C) 2001,2002 Sampo Saaristo
* Tampere University of Technology
* Institute of Communications Engineering
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public Licenseas published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _ZEBRA_ISIS_TLV_H
#define _ZEBRA_ISIS_TLV_H
/*
* Structures found in TLV's.
* this header is fully complient with
* RFC 3359
1. TLV Codepoints reserved
____________________________________________________
Name Value IIH LSP SNP Status
____________________________________________________
Area Addresses 1 y y n ISO 10589
IIS Neighbors 2 n y n ISO 10589
ES Neighbors 3 n y n ISO 10589
Part. DIS 4 n y n ISO 10589
Prefix Neighbors 5 n y n ISO 10589
IIS Neighbors 6 y n n ISO 10589
Padding 8 y n n ISO 10589
LSP Entries 9 n n y ISO 10589
Authentication 10 y y y ISO 10589
Opt. Checksum 12 y n y RFC 3358
LSPBufferSize 14 n y n ISO 10589 Rev 2 Draft
TE IIS Neigh. 22 n y n RFC 3784
IS Alias ID 24 n y n RFC 3786
DECnet Phase IV 42 y n n DEC (ancient)
Lucent Proprietary 66 n y n
IP Int. Reach 128 n y n RFC 1195
Prot. Supported 129 y y n RFC 1195
IP Ext. Address 130 n y n RFC 1195
IDRPI 131 n y y RFC 1195
IP Intf. Address 132 y y n RFC 1195
Illegal 133 n n n RFC 1195 (not used)
Router ID 134 n y n RFC 3784
TE IP. Reach 135 n y n RFC 3784
Dynamic Name 137 n y n RFC 2763
Nortel Proprietary 176 n y n
Nortel Proprietary 177 n y n
Restart TLV 211 y n n RFC 3847
MT-ISN 222 n y n IETF-draft
M-Topologies 229 y y n IETF-draft
IPv6 Intf. Addr. 232 y y n IETF-draft
MT IP. Reach 235 n y n IETF-draft
IPv6 IP. Reach 236 n y n IETF-draft
MT IPv6 IP. Reach 237 n y n IETF-draft
P2P Adjacency State 240 y n n RFC 3373
*/
#define AREA_ADDRESSES 1
#define IS_NEIGHBOURS 2
#define ES_NEIGHBOURS 3
#define PARTITION_DESIG_LEVEL2_IS 4
#define PREFIX_NEIGHBOURS 5
#define LAN_NEIGHBOURS 6
#define PADDING 8
#define LSP_ENTRIES 9
#define AUTH_INFO 10
#define CHECKSUM 12
#define TE_IS_NEIGHBOURS 22
#define IPV4_INT_REACHABILITY 128
#define IPV4_EXT_REACHABILITY 130
#define PROTOCOLS_SUPPORTED 129
#define IDRP_INFO 131
#define IPV4_ADDR 132
#define TE_ROUTER_ID 134
#define TE_IPV4_REACHABILITY 135
#define DYNAMIC_HOSTNAME 137
#define GRACEFUL_RESTART 211
#define IPV6_REACHABILITY 236
#define IPV6_ADDR 232
#define WAY3_HELLO 240
#define IS_NEIGHBOURS_LEN (ISIS_SYS_ID_LEN + 5)
#define LAN_NEIGHBOURS_LEN 6
#define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN) /* FIXME: should be entry */
#define IPV4_REACH_LEN 12
#define IPV6_REACH_LEN 22
/* struct for neighbor */
struct is_neigh
{
struct metric metrics;
u_char neigh_id[ISIS_SYS_ID_LEN + 1];
};
/* struct for te is neighbor */
struct te_is_neigh
{
u_char neigh_id[ISIS_SYS_ID_LEN + 1];
u_char te_metric[3];
u_char sub_tlvs_length;
};
/* struct for es neighbors */
struct es_neigh
{
struct metric metrics;
/* approximate position of first, we use the
* length ((uchar*)metric-1) to know all */
u_char first_es_neigh[ISIS_SYS_ID_LEN];
};
struct partition_desig_level2_is
{
struct list *isis_system_ids;
};
/* struct for lan neighbors */
struct lan_neigh
{
u_char LAN_addr[6];
};
/* struct for LSP entry */
struct lsp_entry
{
u_int16_t rem_lifetime;
u_char lsp_id[ISIS_SYS_ID_LEN + 2];
u_int32_t seq_num;
u_int16_t checksum;
} __attribute__ ((packed));
/* struct for checksum */
struct checksum
{
u_int16_t checksum;
};
/* ipv4 reachability */
struct ipv4_reachability
{
struct metric metrics;
struct in_addr prefix;
struct in_addr mask;
};
/* te router id */
struct te_router_id
{
struct in_addr id;
};
/* te ipv4 reachability */
struct te_ipv4_reachability
{
u_int32_t te_metric;
u_char control;
u_char prefix_start; /* since this is variable length by nature it only */
}; /* points to an approximate location */
struct idrp_info
{
u_char len;
u_char *value;
};
#ifdef HAVE_IPV6
struct ipv6_reachability
{
u_int32_t metric;
u_char control_info;
u_char prefix_len;
u_char prefix[16];
};
#endif /* HAVE_IPV6 */
/* bits in control_info */
#define CTRL_INFO_DIRECTION 0x80
#define DIRECTION_UP 0
#define DIRECTION_DOWN 1
#define CTRL_INFO_DISTRIBUTION 0x40
#define DISTRIBUTION_INTERNAL 0
#define DISTRIBUTION_EXTERNAL 1
#define CTRL_INFO_SUBTLVS 0x20
/*
* Pointer to each tlv type, filled by parse_tlvs()
*/
struct tlvs
{
struct list *area_addrs;
struct list *is_neighs;
struct list *te_is_neighs;
struct list *es_neighs;
struct list *lsp_entries;
struct list *prefix_neighs;
struct list *lan_neighs;
struct checksum *checksum;
struct nlpids *nlpids;
struct list *ipv4_addrs;
struct list *ipv4_int_reachs;
struct list *ipv4_ext_reachs;
struct list *te_ipv4_reachs;
struct hostname *hostname;
struct te_router_id *router_id;
#ifdef HAVE_IPV6
struct list *ipv6_addrs;
struct list *ipv6_reachs;
#endif
struct isis_passwd auth_info;
};
/*
* Own definitions - used to bitmask found and expected
*/
#define TLVFLAG_AREA_ADDRS (1<<0)
#define TLVFLAG_IS_NEIGHS (1<<1)
#define TLVFLAG_ES_NEIGHS (1<<2)
#define TLVFLAG_PARTITION_DESIG_LEVEL2_IS (1<<3)
#define TLVFLAG_PREFIX_NEIGHS (1<<4)
#define TLVFLAG_LAN_NEIGHS (1<<5)
#define TLVFLAG_LSP_ENTRIES (1<<6)
#define TLVFLAG_PADDING (1<<7)
#define TLVFLAG_AUTH_INFO (1<<8)
#define TLVFLAG_IPV4_INT_REACHABILITY (1<<9)
#define TLVFLAG_NLPID (1<<10)
#define TLVFLAG_IPV4_EXT_REACHABILITY (1<<11)
#define TLVFLAG_IPV4_ADDR (1<<12)
#define TLVFLAG_DYN_HOSTNAME (1<<13)
#define TLVFLAG_IPV6_ADDR (1<<14)
#define TLVFLAG_IPV6_REACHABILITY (1<<15)
#define TLVFLAG_TE_IS_NEIGHS (1<<16)
#define TLVFLAG_TE_IPV4_REACHABILITY (1<<17)
#define TLVFLAG_3WAY_HELLO (1<<18)
#define TLVFLAG_TE_ROUTER_ID (1<<19)
#define TLVFLAG_CHECKSUM (1<<20)
#define TLVFLAG_GRACEFUL_RESTART (1<<21)
void init_tlvs (struct tlvs *tlvs, uint32_t expected);
void free_tlvs (struct tlvs *tlvs);
int parse_tlvs (char *areatag, u_char * stream, int size,
u_int32_t * expected, u_int32_t * found, struct tlvs *tlvs);
void free_tlv (void *val);
int add_tlv (u_char, u_char, u_char *, struct stream *);
int tlv_add_area_addrs (struct list *area_addrs, struct stream *stream);
int tlv_add_is_neighs (struct list *is_neighs, struct stream *stream);
int tlv_add_lan_neighs (struct list *lan_neighs, struct stream *stream);
int tlv_add_nlpid (struct nlpids *nlpids, struct stream *stream);
int tlv_add_checksum (struct checksum *checksum, struct stream *stream);
int tlv_add_authinfo (char auth_type, char authlen, u_char *auth_value,
struct stream *stream);
int tlv_add_ip_addrs (struct list *ip_addrs, struct stream *stream);
int tlv_add_dynamic_hostname (struct hostname *hostname,
struct stream *stream);
int tlv_add_lsp_entries (struct list *lsps, struct stream *stream);
int tlv_add_ipv4_reachs (struct list *ipv4_reachs, struct stream *stream);
#ifdef HAVE_IPV6
int tlv_add_ipv6_addrs (struct list *ipv6_addrs, struct stream *stream);
int tlv_add_ipv6_reachs (struct list *ipv6_reachs, struct stream *stream);
#endif /* HAVE_IPV6 */
int tlv_add_padding (struct stream *stream);
#endif /* _ZEBRA_ISIS_TLV_H */
|
