2 * IS-IS Rout(e)ing protocol - isis_tlv.h
3 * IS-IS TLV related routines
5 * Copyright (C) 2001,2002 Sampo Saaristo
6 * Tampere University of Technology
7 * Institute of Communications Engineering
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)
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
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.
24 #ifndef _ZEBRA_ISIS_TLV_H
25 #define _ZEBRA_ISIS_TLV_H
28 * The list of TLVs we (should) support.
29 * ____________________________________________________________________________
30 * Name Value IIH LSP SNP Status
32 * ____________________________________________________________________________
34 * Area Addresses 1 y y n ISO10589
35 * IIS Neighbors 2 n y n ISO10589
36 * ES Neighbors 3 n y n ISO10589
37 * IIS Neighbors 6 y n n ISO10589
38 * Padding 8 y n n ISO10589
39 * LSP Entries 9 n n y ISO10589
40 * Authentication 10 y y y ISO10589, RFC3567
41 * Checksum 12 y n y RFC3358
42 * Extended IS Reachability 22 n y n RFC5305
43 * IS Alias 24 n y n RFC3786
44 * IP Int. Reachability 128 n y n RFC1195
45 * Protocols Supported 129 y y n RFC1195
46 * IP Ext. Reachability 130 n y n RFC1195
47 * IDRPI 131 n y y RFC1195
48 * IP Interface Address 132 y y n RFC1195
49 * TE Router ID 134 n y n RFC5305
50 * Extended IP Reachability 135 n y n RFC5305
51 * Dynamic Hostname 137 n y n RFC2763
52 * Shared Risk Link Group 138 n y y RFC5307
53 * Inter-AS Reachability 141 n y n RFC5316
54 * Restart TLV 211 y n n RFC3847
55 * MT IS Reachability 222 n y n RFC5120
56 * MT Supported 229 y y n RFC5120
57 * IPv6 Interface Address 232 y y n RFC5308
58 * MT IP Reachability 235 n y n RFC5120
59 * IPv6 IP Reachability 236 n y n RFC5308
60 * MT IPv6 IP Reachability 237 n y n RFC5120
61 * P2P Adjacency State 240 y n n RFC3373
62 * IIH Sequence Number 241 y n n draft-shen-isis-iih-sequence
63 * Router Capability 242 n y n RFC4971
66 * IS Reachability sub-TLVs we support (See isis_te.[c,h])
67 * ____________________________________________________________________________
69 * ____________________________________________________________________________
70 * Administartive group (color) 3 RFC5305
71 * Link Local/Remote Identifiers 4 RFC5307
72 * IPv4 interface address 6 RFC5305
73 * IPv4 neighbor address 8 RFC5305
74 * Maximum link bandwidth 9 RFC5305
75 * Reservable link bandwidth 10 RFC5305
76 * Unreserved bandwidth 11 RFC5305
77 * TE Default metric 18 RFC5305
78 * Link Protection Type 20 RFC5307
79 * Interface Switching Capability 21 RFC5307
80 * Remote AS number 24 RFC5316
81 * IPv4 Remote ASBR identifier 25 RFC5316
84 * IP Reachability sub-TLVs we (should) support.
85 * ____________________________________________________________________________
87 * ____________________________________________________________________________
88 * 32bit administrative tag 1 RFC5130
89 * 64bit administrative tag 2 RFC5130
90 * Management prefix color 117 RFC5120
93 #define AREA_ADDRESSES 1
94 #define IS_NEIGHBOURS 2
95 #define ES_NEIGHBOURS 3
96 #define LAN_NEIGHBOURS 6
101 #define TE_IS_NEIGHBOURS 22
103 #define IPV4_INT_REACHABILITY 128
104 #define PROTOCOLS_SUPPORTED 129
105 #define IPV4_EXT_REACHABILITY 130
106 #define IDRP_INFO 131
107 #define IPV4_ADDR 132
108 #define TE_ROUTER_ID 134
109 #define TE_IPV4_REACHABILITY 135
110 #define DYNAMIC_HOSTNAME 137
111 #define GRACEFUL_RESTART 211
112 #define IPV6_ADDR 232
113 #define IPV6_REACHABILITY 236
114 #define WAY3_HELLO 240
115 #define ROUTER_INFORMATION 242
117 #define AUTH_INFO_HDRLEN 3
119 #define MAX_TLV_LEN 255
121 #define IS_NEIGHBOURS_LEN (ISIS_SYS_ID_LEN + 5)
122 #define LAN_NEIGHBOURS_LEN 6
123 #define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN) /* FIXME: should be entry */
124 #define IPV4_REACH_LEN 12
125 #define IPV6_REACH_LEN 22
126 #define TE_IPV4_REACH_LEN 9
128 #define MAX_SUBTLV_SIZE 256
130 /* struct for neighbor */
133 struct metric metrics;
134 u_char neigh_id[ISIS_SYS_ID_LEN + 1];
137 /* struct for te metric */
140 u_char neigh_id[ISIS_SYS_ID_LEN + 1];
142 u_char sub_tlvs_length;
143 /* Theorical Maximum SubTLVs is 256 because the sub_tlvs_length is 8 bits */
144 /* Practically, 118 bytes are necessary to store all supported TE parameters */
145 /* FIXME: A pointer will use less memory, but need to be free */
146 /* which is hard to fix, especially within free_tlvs() function */
147 /* and malloc() / free() as a CPU cost compared to the memory usage */
148 u_char sub_tlvs[MAX_SUBTLV_SIZE]; /* SUB TLVs storage */
151 /* Decode and encode three-octet metric into host byte order integer */
152 #define GET_TE_METRIC(t) \
153 (((unsigned)(t)->te_metric[0]<<16) | ((t)->te_metric[1]<<8) | \
155 #define SET_TE_METRIC(t, m) \
156 (((t)->te_metric[0] = (m) >> 16), \
157 ((t)->te_metric[1] = (m) >> 8), \
158 ((t)->te_metric[2] = (m)))
160 /* struct for es neighbors */
163 struct metric metrics;
164 /* approximate position of first, we use the
165 * length ((uchar*)metric-1) to know all */
166 u_char first_es_neigh[ISIS_SYS_ID_LEN];
170 struct partition_desig_level2_is
172 struct list *isis_system_ids;
175 /* struct for lan neighbors */
185 /* struct for LSP entry */
188 u_int16_t rem_lifetime;
189 u_char lsp_id[ISIS_SYS_ID_LEN + 2];
192 } __attribute__ ((packed));
198 /* struct for checksum */
204 /* ipv4 reachability */
205 struct ipv4_reachability
207 struct metric metrics;
208 struct in_addr prefix;
218 /* te ipv4 reachability */
219 struct te_ipv4_reachability
223 u_char prefix_start; /* since this is variable length by nature it only */
224 }; /* points to an approximate location */
235 struct ipv6_reachability
243 /* bits in control_info */
244 #define CTRL_INFO_DIRECTION 0x80
245 #define DIRECTION_UP 0x00
246 #define DIRECTION_DOWN 0x80
248 #define CTRL_INFO_DISTRIBUTION 0x40
249 #define DISTRIBUTION_INTERNAL 0x00
250 #define DISTRIBUTION_EXTERNAL 0x40
252 #define CTRL_INFO_SUBTLVS 0x20
253 #endif /* HAVE_IPV6 */
256 * Pointer to each tlv type, filled by parse_tlvs()
260 struct checksum *checksum;
261 struct hostname *hostname;
262 struct nlpids *nlpids;
263 struct te_router_id *router_id;
264 struct list *area_addrs;
265 struct list *is_neighs;
266 struct list *te_is_neighs;
267 struct list *es_neighs;
268 struct list *lsp_entries;
269 struct list *prefix_neighs;
270 struct list *lan_neighs;
271 struct list *ipv4_addrs;
272 struct list *ipv4_int_reachs;
273 struct list *ipv4_ext_reachs;
274 struct list *te_ipv4_reachs;
276 struct list *ipv6_addrs;
277 struct list *ipv6_reachs;
279 struct isis_passwd auth_info;
283 * Own definitions - used to bitmask found and expected
286 #define TLVFLAG_AREA_ADDRS (1<<0)
287 #define TLVFLAG_IS_NEIGHS (1<<1)
288 #define TLVFLAG_ES_NEIGHS (1<<2)
289 #define TLVFLAG_PARTITION_DESIG_LEVEL2_IS (1<<3)
290 #define TLVFLAG_PREFIX_NEIGHS (1<<4)
291 #define TLVFLAG_LAN_NEIGHS (1<<5)
292 #define TLVFLAG_LSP_ENTRIES (1<<6)
293 #define TLVFLAG_PADDING (1<<7)
294 #define TLVFLAG_AUTH_INFO (1<<8)
295 #define TLVFLAG_IPV4_INT_REACHABILITY (1<<9)
296 #define TLVFLAG_NLPID (1<<10)
297 #define TLVFLAG_IPV4_EXT_REACHABILITY (1<<11)
298 #define TLVFLAG_IPV4_ADDR (1<<12)
299 #define TLVFLAG_DYN_HOSTNAME (1<<13)
300 #define TLVFLAG_IPV6_ADDR (1<<14)
301 #define TLVFLAG_IPV6_REACHABILITY (1<<15)
302 #define TLVFLAG_TE_IS_NEIGHS (1<<16)
303 #define TLVFLAG_TE_IPV4_REACHABILITY (1<<17)
304 #define TLVFLAG_3WAY_HELLO (1<<18)
305 #define TLVFLAG_TE_ROUTER_ID (1<<19)
306 #define TLVFLAG_CHECKSUM (1<<20)
307 #define TLVFLAG_GRACEFUL_RESTART (1<<21)
309 void init_tlvs (struct tlvs *tlvs, uint32_t expected);
310 void free_tlvs (struct tlvs *tlvs);
311 int parse_tlvs (char *areatag, u_char * stream, int size,
312 u_int32_t * expected, u_int32_t * found, struct tlvs *tlvs,
313 u_int32_t * auth_tlv_offset);
314 int add_tlv (u_char, u_char, u_char *, struct stream *);
315 void free_tlv (void *val);
317 int tlv_add_area_addrs (struct list *area_addrs, struct stream *stream);
318 int tlv_add_is_neighs (struct list *is_neighs, struct stream *stream);
319 int tlv_add_te_is_neighs (struct list *te_is_neighs, struct stream *stream);
320 int tlv_add_lan_neighs (struct list *lan_neighs, struct stream *stream);
321 int tlv_add_nlpid (struct nlpids *nlpids, struct stream *stream);
322 int tlv_add_checksum (struct checksum *checksum, struct stream *stream);
323 int tlv_add_authinfo (u_char auth_type, u_char authlen, u_char *auth_value,
324 struct stream *stream);
325 int tlv_add_ip_addrs (struct list *ip_addrs, struct stream *stream);
326 int tlv_add_in_addr (struct in_addr *, struct stream *stream, u_char tag);
327 int tlv_add_dynamic_hostname (struct hostname *hostname,
328 struct stream *stream);
329 int tlv_add_lsp_entries (struct list *lsps, struct stream *stream);
330 int tlv_add_ipv4_int_reachs (struct list *ipv4_reachs, struct stream *stream);
331 int tlv_add_ipv4_ext_reachs (struct list *ipv4_reachs, struct stream *stream);
332 int tlv_add_te_ipv4_reachs (struct list *te_ipv4_reachs, struct stream *stream);
334 int tlv_add_ipv6_addrs (struct list *ipv6_addrs, struct stream *stream);
335 int tlv_add_ipv6_reachs (struct list *ipv6_reachs, struct stream *stream);
336 #endif /* HAVE_IPV6 */
338 int tlv_add_padding (struct stream *stream);
340 #endif /* _ZEBRA_ISIS_TLV_H */