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gerrit.opencord.org / quagga / efba6ce941fb96763d5804212a674ca6b7098853 / . / isisd / isis_tlv.h
blob: e030385e17e9fe021f07d15d2dc06421190807c1 [file] [log] [blame]
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
hasso00995cf2004-05-19 13:43:50 +0000[diff] [blame]30 * RFC 3359
jardineb5d44e2003-12-23 08:09:43 +0000[diff] [blame]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)
hasso00995cf2004-05-19 13:43:50 +0000[diff] [blame]49 Lucent Proprietary 66 n y n
jardineb5d44e2003-12-23 08:09:43 +0000[diff] [blame]50 IP Int. Reach 128 n y n RFC 1195
51 Prot. Supported 129 y y n RFC 1195
52 IP Ext. Address 130 n y n RFC 1195
53 IDRPI 131 n y y RFC 1195
54 IP Intf. Address 132 y y n RFC 1195
55 Illegal 133 n n n RFC 1195 (not used)
56 Router ID 134 n y n IETF-draft
57 TE IP. Reach 135 n y n IETF-draft
58 Dynamic Name 137 n y n RFC 2763
59 Nortel Proprietary 176 n y n
60 Nortel Proprietary 177 n y n
61 Restart TLV 211 y n n IETF-draft
62 MT-ISN 222 n y n IETF-draft
63 M-Topologies 229 y y n IETF-draft
64 IPv6 Intf. Addr. 232 y y n IETF-draft
65 MT IP. Reach 235 n y n IETF-draft
66 IPv6 IP. Reach 236 n y n IETF-draft
67 MT IPv6 IP. Reach 237 n y n IETF-draft
68 P2P Adjacency State 240 y n n IETF-draft
69
70 */
71
72#define AREA_ADDRESSES 1
73#define IS_NEIGHBOURS 2
74#define ES_NEIGHBOURS 3
75#define PARTITION_DESIG_LEVEL2_IS 4
76#define PREFIX_NEIGHBOURS 5
77#define LAN_NEIGHBOURS 6
78#define PADDING 8
79#define LSP_ENTRIES 9
80#define AUTH_INFO 10
81#define CHECKSUM 12
82#define TE_IS_NEIGHBOURS 22
83#define IPV4_INT_REACHABILITY 128
84#define IPV4_EXT_REACHABILITY 130
85#define PROTOCOLS_SUPPORTED 129
86#define IDRP_INFO 131
87#define IPV4_ADDR 132
88#define TE_ROUTER_ID 134
89#define TE_IPV4_REACHABILITY 135
90#define DYNAMIC_HOSTNAME 137
hasso00995cf2004-05-19 13:43:50 +0000[diff] [blame]91#define GRACEFUL_RESTART 211
jardineb5d44e2003-12-23 08:09:43 +0000[diff] [blame]92#define IPV6_REACHABILITY 236
93#define IPV6_ADDR 232
94#define WAY3_HELLO 240
95
96#define IS_NEIGHBOURS_LEN (ISIS_SYS_ID_LEN + 5)
97#define LAN_NEIGHBOURS_LEN 6
98#define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN) /* FIXME: should be entry */
99#define IPV4_REACH_LEN 12
100#define IPV6_REACH_LEN 22
101
102/* struct for neighbor */
103struct is_neigh{
104 struct metric metrics;
105 u_char neigh_id[ISIS_SYS_ID_LEN + 1];
106};
107
108/* struct for te is neighbor */
109struct te_is_neigh{
110 u_char neigh_id[ISIS_SYS_ID_LEN + 1];
111 u_char te_metric[3];
112 u_char sub_tlvs_length;
113};
114
115/* struct for es neighbors */
116struct es_neigh{
117 struct metric metrics;
118 /* approximate position of first, we use the
119 * length ((uchar*)metric-1) to know all */
120 u_char first_es_neigh[ISIS_SYS_ID_LEN];
121
122};
123
124struct partition_desig_level2_is{
125 struct list *isis_system_ids;
126};
127
128/* struct for lan neighbors */
129struct lan_neigh{
130 u_char LAN_addr[6];
131};
132
133/* struct for LSP entry */
134struct lsp_entry {
135 u_int16_t rem_lifetime;
136 u_char lsp_id[ISIS_SYS_ID_LEN + 2];
137 u_int32_t seq_num;
138 u_int16_t checksum;
139} __attribute__((packed));
140
141/* struct for checksum */
142struct checksum {
143 u_int16_t checksum;
144};
145
146/* ipv4 reachability */
147struct ipv4_reachability {
148 struct metric metrics;
149 struct in_addr prefix;
150 struct in_addr mask;
151};
152
153/* te router id */
154struct te_router_id {
155 struct in_addr id;
156};
157
158/* te ipv4 reachability */
159struct te_ipv4_reachability {
160 u_int32_t te_metric;
161 u_char control;
162 u_char prefix_start; /* since this is variable length by nature it only */
163}; /* points to an approximate location */
164
165
166
167struct idrp_info {
168 u_char len;
169 u_char *value;
170};
171
172#ifdef HAVE_IPV6
173struct ipv6_reachability {
174 u_int32_t metric;
175 u_char control_info;
176 u_char prefix_len;
177 u_char prefix[16];
178};
179#endif /* HAVE_IPV6 */
180
181/* bits in control_info */
182#define CTRL_INFO_DIRECTION 0x80
183#define DIRECTION_UP 0
184#define DIRECTION_DOWN 1
185#define CTRL_INFO_DISTRIBUTION 0x40
186#define DISTRIBUTION_INTERNAL 0
187#define DISTRIBUTION_EXTERNAL 1
188#define CTRL_INFO_SUBTLVS 0x20
189
190/*
191 * Pointer to each tlv type, filled by parse_tlvs()
192 */
193struct tlvs {
194 struct list *area_addrs;
195 struct list *is_neighs;
196 struct list *te_is_neighs;
197 struct list *es_neighs;
198 struct list *lsp_entries;
199 struct list *prefix_neighs;
200 struct list *lan_neighs;
201 struct checksum *checksum;
202 struct nlpids *nlpids;
203 struct list *ipv4_addrs;
204 struct list *ipv4_int_reachs;
205 struct list *ipv4_ext_reachs;
206 struct list *te_ipv4_reachs;
207 struct hostname *hostname;
208 struct te_router_id *router_id;
209#ifdef HAVE_IPV6
210 struct list *ipv6_addrs;
211 struct list *ipv6_reachs;
212#endif
213 struct isis_passwd auth_info;
214};
215
216/*
217 * Own definitions - used to bitmask found and expected
218 */
219
220#define TLVFLAG_AREA_ADDRS (1<<0)
221#define TLVFLAG_IS_NEIGHS (1<<1)
222#define TLVFLAG_ES_NEIGHS (1<<2)
223#define TLVFLAG_PARTITION_DESIG_LEVEL2_IS (1<<3)
224#define TLVFLAG_PREFIX_NEIGHS (1<<4)
225#define TLVFLAG_LAN_NEIGHS (1<<5)
226#define TLVFLAG_LSP_ENTRIES (1<<6)
227#define TLVFLAG_PADDING (1<<7)
228#define TLVFLAG_AUTH_INFO (1<<8)
229#define TLVFLAG_IPV4_INT_REACHABILITY (1<<9)
230#define TLVFLAG_NLPID (1<<10)
231#define TLVFLAG_IPV4_EXT_REACHABILITY (1<<11)
232#define TLVFLAG_IPV4_ADDR (1<<12)
233#define TLVFLAG_DYN_HOSTNAME (1<<13)
234#define TLVFLAG_IPV6_ADDR (1<<14)
235#define TLVFLAG_IPV6_REACHABILITY (1<<15)
236#define TLVFLAG_TE_IS_NEIGHS (1<<16)
237#define TLVFLAG_TE_IPV4_REACHABILITY (1<<17)
238#define TLVFLAG_3WAY_HELLO (1<<18)
239#define TLVFLAG_TE_ROUTER_ID (1<<19)
240#define TLVFLAG_CHECKSUM (1<<20)
hasso00995cf2004-05-19 13:43:50 +0000[diff] [blame]241#define TLVFLAG_GRACEFUL_RESTART (1<<21)
jardineb5d44e2003-12-23 08:09:43 +0000[diff] [blame]242
243void init_tlvs (struct tlvs *tlvs, uint32_t expected);
244void free_tlvs (struct tlvs *tlvs);
245int parse_tlvs (char *areatag, u_char *stream, int size, u_int32_t *expected,
246 u_int32_t *found, struct tlvs *tlvs);
247void free_tlv (void *val);
248
249int tlv_add_area_addrs (struct list *area_addrs, struct stream *stream);
250int tlv_add_is_neighs (struct list *is_neighs, struct stream *stream);
251int tlv_add_lan_neighs (struct list *lan_neighs, struct stream *stream);
252int tlv_add_nlpid (struct nlpids *nlpids, struct stream *stream);
253int tlv_add_checksum (struct checksum *checksum,
254 struct stream *stream);
255int tlv_add_authinfo (char auth_type, char authlen, char *auth_value,
256 struct stream *stream);
257int tlv_add_ip_addrs (struct list *ip_addrs, struct stream *stream);
258int tlv_add_dynamic_hostname (struct hostname *hostname,struct stream *stream);
259int tlv_add_lsp_entries (struct list *lsps, struct stream *stream);
260int tlv_add_ipv4_reachs (struct list *ipv4_reachs, struct stream *stream);
261#ifdef HAVE_IPV6
262int tlv_add_ipv6_addrs (struct list *ipv6_addrs, struct stream *stream);
263int tlv_add_ipv6_reachs (struct list *ipv6_reachs, struct stream *stream);
264#endif /* HAVE_IPV6 */
265
266int tlv_add_padding (struct stream *stream);
267
268#endif /* _ZEBRA_ISIS_TLV_H */
269
270
271