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gerrit.opencord.org / quagga / eb26037b73991750392c6deaad09f2fd7600ebee / . / isisd / isis_tlv.h
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jardineb5d44e2003-12-23 08:09:43 +0000[diff] [blame]1/*
2 * IS-IS Rout(e)ing protocol - isis_tlv.h
3 * IS-IS TLV related routines
4 *
5 * Copyright (C) 2001,2002 Sampo Saaristo
6 * Tampere University of Technology
7 * Institute of Communications Engineering
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public Licenseas published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * more details.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24#ifndef _ZEBRA_ISIS_TLV_H
25#define _ZEBRA_ISIS_TLV_H
26
27/*
28 * Structures found in TLV's.
29 * this header is fully complient with
30 * draft-ietf-isis-wg-tlv-codepoints-02.txt
31 1. TLV Codepoints reserved
32 ____________________________________________________
33 Name Value IIH LSP SNP Status
34 ____________________________________________________
35
36 Area Addresses 1 y y n ISO 10589
37 IIS Neighbors 2 n y n ISO 10589
38 ES Neighbors 3 n y n ISO 10589
39 Part. DIS 4 n y n ISO 10589
40 Prefix Neighbors 5 n y n ISO 10589
41 IIS Neighbors 6 y n n ISO 10589
42 Padding 8 y n n ISO 10589
43 LSP Entries 9 n n y ISO 10589
44 Authentication 10 y y y ISO 10589
45 Opt. Checksum 12 y n y IETF-draft
46 LSPBufferSize 14 n y n ISO 10589 Rev 2 Draft
47 TE IIS Neigh. 22 n y n IETF-draft
48 DECnet Phase IV 42 y n n DEC (ancient)
49 IP Int. Reach 128 n y n RFC 1195
50 Prot. Supported 129 y y n RFC 1195
51 IP Ext. Address 130 n y n RFC 1195
52 IDRPI 131 n y y RFC 1195
53 IP Intf. Address 132 y y n RFC 1195
54 Illegal 133 n n n RFC 1195 (not used)
55 Router ID 134 n y n IETF-draft
56 TE IP. Reach 135 n y n IETF-draft
57 Dynamic Name 137 n y n RFC 2763
58 Nortel Proprietary 176 n y n
59 Nortel Proprietary 177 n y n
60 Restart TLV 211 y n n IETF-draft
61 MT-ISN 222 n y n IETF-draft
62 M-Topologies 229 y y n IETF-draft
63 IPv6 Intf. Addr. 232 y y n IETF-draft
64 MT IP. Reach 235 n y n IETF-draft
65 IPv6 IP. Reach 236 n y n IETF-draft
66 MT IPv6 IP. Reach 237 n y n IETF-draft
67 P2P Adjacency State 240 y n n IETF-draft
68
69 */
70
71#define AREA_ADDRESSES 1
72#define IS_NEIGHBOURS 2
73#define ES_NEIGHBOURS 3
74#define PARTITION_DESIG_LEVEL2_IS 4
75#define PREFIX_NEIGHBOURS 5
76#define LAN_NEIGHBOURS 6
77#define PADDING 8
78#define LSP_ENTRIES 9
79#define AUTH_INFO 10
80#define CHECKSUM 12
81#define TE_IS_NEIGHBOURS 22
82#define IPV4_INT_REACHABILITY 128
83#define IPV4_EXT_REACHABILITY 130
84#define PROTOCOLS_SUPPORTED 129
85#define IDRP_INFO 131
86#define IPV4_ADDR 132
87#define TE_ROUTER_ID 134
88#define TE_IPV4_REACHABILITY 135
89#define DYNAMIC_HOSTNAME 137
90#define IPV6_REACHABILITY 236
91#define IPV6_ADDR 232
92#define WAY3_HELLO 240
93
94#define IS_NEIGHBOURS_LEN (ISIS_SYS_ID_LEN + 5)
95#define LAN_NEIGHBOURS_LEN 6
96#define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN) /* FIXME: should be entry */
97#define IPV4_REACH_LEN 12
98#define IPV6_REACH_LEN 22
99
100/* struct for neighbor */
101struct is_neigh{
102 struct metric metrics;
103 u_char neigh_id[ISIS_SYS_ID_LEN + 1];
104};
105
106/* struct for te is neighbor */
107struct te_is_neigh{
108 u_char neigh_id[ISIS_SYS_ID_LEN + 1];
109 u_char te_metric[3];
110 u_char sub_tlvs_length;
111};
112
113/* struct for es neighbors */
114struct es_neigh{
115 struct metric metrics;
116 /* approximate position of first, we use the
117 * length ((uchar*)metric-1) to know all */
118 u_char first_es_neigh[ISIS_SYS_ID_LEN];
119
120};
121
122struct partition_desig_level2_is{
123 struct list *isis_system_ids;
124};
125
126/* struct for lan neighbors */
127struct lan_neigh{
128 u_char LAN_addr[6];
129};
130
131/* struct for LSP entry */
132struct lsp_entry {
133 u_int16_t rem_lifetime;
134 u_char lsp_id[ISIS_SYS_ID_LEN + 2];
135 u_int32_t seq_num;
136 u_int16_t checksum;
137} __attribute__((packed));
138
139/* struct for checksum */
140struct checksum {
141 u_int16_t checksum;
142};
143
144/* ipv4 reachability */
145struct ipv4_reachability {
146 struct metric metrics;
147 struct in_addr prefix;
148 struct in_addr mask;
149};
150
151/* te router id */
152struct te_router_id {
153 struct in_addr id;
154};
155
156/* te ipv4 reachability */
157struct te_ipv4_reachability {
158 u_int32_t te_metric;
159 u_char control;
160 u_char prefix_start; /* since this is variable length by nature it only */
161}; /* points to an approximate location */
162
163
164
165struct idrp_info {
166 u_char len;
167 u_char *value;
168};
169
170#ifdef HAVE_IPV6
171struct ipv6_reachability {
172 u_int32_t metric;
173 u_char control_info;
174 u_char prefix_len;
175 u_char prefix[16];
176};
177#endif /* HAVE_IPV6 */
178
179/* bits in control_info */
180#define CTRL_INFO_DIRECTION 0x80
181#define DIRECTION_UP 0
182#define DIRECTION_DOWN 1
183#define CTRL_INFO_DISTRIBUTION 0x40
184#define DISTRIBUTION_INTERNAL 0
185#define DISTRIBUTION_EXTERNAL 1
186#define CTRL_INFO_SUBTLVS 0x20
187
188/*
189 * Pointer to each tlv type, filled by parse_tlvs()
190 */
191struct tlvs {
192 struct list *area_addrs;
193 struct list *is_neighs;
194 struct list *te_is_neighs;
195 struct list *es_neighs;
196 struct list *lsp_entries;
197 struct list *prefix_neighs;
198 struct list *lan_neighs;
199 struct checksum *checksum;
200 struct nlpids *nlpids;
201 struct list *ipv4_addrs;
202 struct list *ipv4_int_reachs;
203 struct list *ipv4_ext_reachs;
204 struct list *te_ipv4_reachs;
205 struct hostname *hostname;
206 struct te_router_id *router_id;
207#ifdef HAVE_IPV6
208 struct list *ipv6_addrs;
209 struct list *ipv6_reachs;
210#endif
211 struct isis_passwd auth_info;
212};
213
214/*
215 * Own definitions - used to bitmask found and expected
216 */
217
218#define TLVFLAG_AREA_ADDRS (1<<0)
219#define TLVFLAG_IS_NEIGHS (1<<1)
220#define TLVFLAG_ES_NEIGHS (1<<2)
221#define TLVFLAG_PARTITION_DESIG_LEVEL2_IS (1<<3)
222#define TLVFLAG_PREFIX_NEIGHS (1<<4)
223#define TLVFLAG_LAN_NEIGHS (1<<5)
224#define TLVFLAG_LSP_ENTRIES (1<<6)
225#define TLVFLAG_PADDING (1<<7)
226#define TLVFLAG_AUTH_INFO (1<<8)
227#define TLVFLAG_IPV4_INT_REACHABILITY (1<<9)
228#define TLVFLAG_NLPID (1<<10)
229#define TLVFLAG_IPV4_EXT_REACHABILITY (1<<11)
230#define TLVFLAG_IPV4_ADDR (1<<12)
231#define TLVFLAG_DYN_HOSTNAME (1<<13)
232#define TLVFLAG_IPV6_ADDR (1<<14)
233#define TLVFLAG_IPV6_REACHABILITY (1<<15)
234#define TLVFLAG_TE_IS_NEIGHS (1<<16)
235#define TLVFLAG_TE_IPV4_REACHABILITY (1<<17)
236#define TLVFLAG_3WAY_HELLO (1<<18)
237#define TLVFLAG_TE_ROUTER_ID (1<<19)
238#define TLVFLAG_CHECKSUM (1<<20)
239
240void init_tlvs (struct tlvs *tlvs, uint32_t expected);
241void free_tlvs (struct tlvs *tlvs);
242int parse_tlvs (char *areatag, u_char *stream, int size, u_int32_t *expected,
243 u_int32_t *found, struct tlvs *tlvs);
244void free_tlv (void *val);
245
246int tlv_add_area_addrs (struct list *area_addrs, struct stream *stream);
247int tlv_add_is_neighs (struct list *is_neighs, struct stream *stream);
248int tlv_add_lan_neighs (struct list *lan_neighs, struct stream *stream);
249int tlv_add_nlpid (struct nlpids *nlpids, struct stream *stream);
250int tlv_add_checksum (struct checksum *checksum,
251 struct stream *stream);
252int tlv_add_authinfo (char auth_type, char authlen, char *auth_value,
253 struct stream *stream);
254int tlv_add_ip_addrs (struct list *ip_addrs, struct stream *stream);
255int tlv_add_dynamic_hostname (struct hostname *hostname,struct stream *stream);
256int tlv_add_lsp_entries (struct list *lsps, struct stream *stream);
257int tlv_add_ipv4_reachs (struct list *ipv4_reachs, struct stream *stream);
258#ifdef HAVE_IPV6
259int tlv_add_ipv6_addrs (struct list *ipv6_addrs, struct stream *stream);
260int tlv_add_ipv6_reachs (struct list *ipv6_reachs, struct stream *stream);
261#endif /* HAVE_IPV6 */
262
263int tlv_add_padding (struct stream *stream);
264
265#endif /* _ZEBRA_ISIS_TLV_H */
266
267
268