]>
Commit | Line | Data |
---|---|---|
eb5d44eb | 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 | |
d62a17ae | 6 | * Tampere University of Technology |
eb5d44eb | 7 | * Institute of Communications Engineering |
8 | * | |
d62a17ae | 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) | |
eb5d44eb | 12 | * any later version. |
13 | * | |
d62a17ae | 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 | |
eb5d44eb | 17 | * more details. |
18 | * | |
896014f4 DL |
19 | * You should have received a copy of the GNU General Public License along |
20 | * with this program; see the file COPYING; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
eb5d44eb | 22 | */ |
23 | ||
24 | #ifndef _ZEBRA_ISIS_TLV_H | |
25 | #define _ZEBRA_ISIS_TLV_H | |
26 | ||
99894f9a CF |
27 | #include "isisd/isis_mt.h" |
28 | ||
eb5d44eb | 29 | /* |
72b9c956 | 30 | * The list of TLVs we (should) support. |
31 | * ____________________________________________________________________________ | |
32 | * Name Value IIH LSP SNP Status | |
33 | * LAN | |
34 | * ____________________________________________________________________________ | |
3f045a08 | 35 | * |
72b9c956 | 36 | * Area Addresses 1 y y n ISO10589 |
37 | * IIS Neighbors 2 n y n ISO10589 | |
38 | * ES Neighbors 3 n y n ISO10589 | |
39 | * IIS Neighbors 6 y n n ISO10589 | |
40 | * Padding 8 y n n ISO10589 | |
41 | * LSP Entries 9 n n y ISO10589 | |
42 | * Authentication 10 y y y ISO10589, RFC3567 | |
43 | * Checksum 12 y n y RFC3358 | |
f8c06e2c | 44 | * Extended IS Reachability 22 n y n RFC5305 |
72b9c956 | 45 | * IS Alias 24 n y n RFC3786 |
46 | * IP Int. Reachability 128 n y n RFC1195 | |
47 | * Protocols Supported 129 y y n RFC1195 | |
48 | * IP Ext. Reachability 130 n y n RFC1195 | |
49 | * IDRPI 131 n y y RFC1195 | |
50 | * IP Interface Address 132 y y n RFC1195 | |
3f045a08 JB |
51 | * TE Router ID 134 n y n RFC5305 |
52 | * Extended IP Reachability 135 n y n RFC5305 | |
72b9c956 | 53 | * Dynamic Hostname 137 n y n RFC2763 |
3f045a08 | 54 | * Shared Risk Link Group 138 n y y RFC5307 |
f8c06e2c | 55 | * Inter-AS Reachability 141 n y n RFC5316 |
72b9c956 | 56 | * Restart TLV 211 y n n RFC3847 |
3f045a08 JB |
57 | * MT IS Reachability 222 n y n RFC5120 |
58 | * MT Supported 229 y y n RFC5120 | |
59 | * IPv6 Interface Address 232 y y n RFC5308 | |
60 | * MT IP Reachability 235 n y n RFC5120 | |
61 | * IPv6 IP Reachability 236 n y n RFC5308 | |
62 | * MT IPv6 IP Reachability 237 n y n RFC5120 | |
72b9c956 | 63 | * P2P Adjacency State 240 y n n RFC3373 |
64 | * IIH Sequence Number 241 y n n draft-shen-isis-iih-sequence | |
f8c06e2c | 65 | * Router Capability 242 n y n RFC4971 |
72b9c956 | 66 | * |
3f045a08 | 67 | * |
f8c06e2c | 68 | * IS Reachability sub-TLVs we support (See isis_te.[c,h]) |
72b9c956 | 69 | * ____________________________________________________________________________ |
70 | * Name Value Status | |
71 | * ____________________________________________________________________________ | |
3f045a08 JB |
72 | * Administartive group (color) 3 RFC5305 |
73 | * Link Local/Remote Identifiers 4 RFC5307 | |
74 | * IPv4 interface address 6 RFC5305 | |
75 | * IPv4 neighbor address 8 RFC5305 | |
76 | * Maximum link bandwidth 9 RFC5305 | |
77 | * Reservable link bandwidth 10 RFC5305 | |
78 | * Unreserved bandwidth 11 RFC5305 | |
79 | * TE Default metric 18 RFC5305 | |
80 | * Link Protection Type 20 RFC5307 | |
81 | * Interface Switching Capability 21 RFC5307 | |
f8c06e2c OD |
82 | * Remote AS number 24 RFC5316 |
83 | * IPv4 Remote ASBR identifier 25 RFC5316 | |
3f045a08 | 84 | * |
72b9c956 | 85 | * |
72b9c956 | 86 | * IP Reachability sub-TLVs we (should) support. |
87 | * ____________________________________________________________________________ | |
88 | * Name Value Status | |
89 | * ____________________________________________________________________________ | |
3f045a08 JB |
90 | * 32bit administrative tag 1 RFC5130 |
91 | * 64bit administrative tag 2 RFC5130 | |
92 | * Management prefix color 117 RFC5120 | |
eb5d44eb | 93 | */ |
94 | ||
95 | #define AREA_ADDRESSES 1 | |
96 | #define IS_NEIGHBOURS 2 | |
97 | #define ES_NEIGHBOURS 3 | |
eb5d44eb | 98 | #define LAN_NEIGHBOURS 6 |
99 | #define PADDING 8 | |
100 | #define LSP_ENTRIES 9 | |
101 | #define AUTH_INFO 10 | |
102 | #define CHECKSUM 12 | |
103 | #define TE_IS_NEIGHBOURS 22 | |
72b9c956 | 104 | #define IS_ALIAS 24 |
eb5d44eb | 105 | #define IPV4_INT_REACHABILITY 128 |
eb5d44eb | 106 | #define PROTOCOLS_SUPPORTED 129 |
72b9c956 | 107 | #define IPV4_EXT_REACHABILITY 130 |
eb5d44eb | 108 | #define IDRP_INFO 131 |
109 | #define IPV4_ADDR 132 | |
110 | #define TE_ROUTER_ID 134 | |
111 | #define TE_IPV4_REACHABILITY 135 | |
112 | #define DYNAMIC_HOSTNAME 137 | |
00995cfc | 113 | #define GRACEFUL_RESTART 211 |
206f4aae | 114 | #define MT_IS_NEIGHBOURS 222 |
99894f9a | 115 | #define MT_ROUTER_INFORMATION 229 |
eb5d44eb | 116 | #define IPV6_ADDR 232 |
c3ae3127 | 117 | #define MT_IPV4_REACHABILITY 235 |
72b9c956 | 118 | #define IPV6_REACHABILITY 236 |
c3ae3127 | 119 | #define MT_IPV6_REACHABILITY 237 |
eb5d44eb | 120 | #define WAY3_HELLO 240 |
f8c06e2c | 121 | #define ROUTER_INFORMATION 242 |
eb5d44eb | 122 | |
3f045a08 JB |
123 | #define AUTH_INFO_HDRLEN 3 |
124 | ||
e316f9ab CF |
125 | #define MAX_TLV_LEN 255 |
126 | ||
eb5d44eb | 127 | #define IS_NEIGHBOURS_LEN (ISIS_SYS_ID_LEN + 5) |
128 | #define LAN_NEIGHBOURS_LEN 6 | |
f390d2c7 | 129 | #define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN) /* FIXME: should be entry */ |
eb5d44eb | 130 | #define IPV4_REACH_LEN 12 |
131 | #define IPV6_REACH_LEN 22 | |
3f045a08 | 132 | #define TE_IPV4_REACH_LEN 9 |
eb5d44eb | 133 | |
f8c06e2c OD |
134 | #define MAX_SUBTLV_SIZE 256 |
135 | ||
eb5d44eb | 136 | /* struct for neighbor */ |
d62a17ae | 137 | struct is_neigh { |
138 | struct metric metrics; | |
139 | u_char neigh_id[ISIS_SYS_ID_LEN + 1]; | |
eb5d44eb | 140 | }; |
141 | ||
f8c06e2c | 142 | /* struct for te metric */ |
d62a17ae | 143 | struct te_is_neigh { |
144 | u_char neigh_id[ISIS_SYS_ID_LEN + 1]; | |
145 | u_char te_metric[3]; | |
146 | u_char sub_tlvs_length; | |
147 | /* Theorical Maximum SubTLVs is 256 because the sub_tlvs_length is 8 | |
148 | * bits */ | |
149 | /* Practically, 118 bytes are necessary to store all supported TE | |
150 | * parameters */ | |
151 | /* FIXME: A pointer will use less memory, but need to be free */ | |
152 | /* which is hard to fix, especially within free_tlvs() function */ | |
153 | /* and malloc() / free() as a CPU cost compared to the memory usage */ | |
154 | u_char sub_tlvs[MAX_SUBTLV_SIZE]; /* SUB TLVs storage */ | |
eb5d44eb | 155 | }; |
156 | ||
3f045a08 | 157 | /* Decode and encode three-octet metric into host byte order integer */ |
d62a17ae | 158 | #define GET_TE_METRIC(t) \ |
159 | (((unsigned)(t)->te_metric[0] << 16) | ((t)->te_metric[1] << 8) \ | |
160 | | (t)->te_metric[2]) | |
161 | #define SET_TE_METRIC(t, m) \ | |
162 | (((t)->te_metric[0] = (m) >> 16), ((t)->te_metric[1] = (m) >> 8), \ | |
163 | ((t)->te_metric[2] = (m))) | |
3f045a08 | 164 | |
eb5d44eb | 165 | /* struct for es neighbors */ |
d62a17ae | 166 | struct es_neigh { |
167 | struct metric metrics; | |
168 | /* approximate position of first, we use the | |
169 | * length ((uchar*)metric-1) to know all */ | |
170 | u_char first_es_neigh[ISIS_SYS_ID_LEN]; | |
eb5d44eb | 171 | }; |
172 | ||
d62a17ae | 173 | struct partition_desig_level2_is { |
174 | struct list *isis_system_ids; | |
eb5d44eb | 175 | }; |
176 | ||
177 | /* struct for lan neighbors */ | |
d62a17ae | 178 | struct lan_neigh { |
179 | u_char LAN_addr[6]; | |
eb5d44eb | 180 | }; |
181 | ||
238497fc PJ |
182 | #ifdef __SUNPRO_C |
183 | #pragma pack(1) | |
184 | #endif | |
185 | ||
eb5d44eb | 186 | /* struct for LSP entry */ |
d62a17ae | 187 | struct lsp_entry { |
188 | u_int16_t rem_lifetime; | |
189 | u_char lsp_id[ISIS_SYS_ID_LEN + 2]; | |
190 | u_int32_t seq_num; | |
191 | u_int16_t checksum; | |
192 | } __attribute__((packed)); | |
eb5d44eb | 193 | |
238497fc PJ |
194 | #ifdef __SUNPRO_C |
195 | #pragma pack() | |
196 | #endif | |
197 | ||
eb5d44eb | 198 | /* struct for checksum */ |
d62a17ae | 199 | struct checksum { |
200 | u_int16_t checksum; | |
eb5d44eb | 201 | }; |
202 | ||
203 | /* ipv4 reachability */ | |
d62a17ae | 204 | struct ipv4_reachability { |
205 | struct metric metrics; | |
206 | struct in_addr prefix; | |
207 | struct in_addr mask; | |
eb5d44eb | 208 | }; |
209 | ||
210 | /* te router id */ | |
d62a17ae | 211 | struct te_router_id { |
212 | struct in_addr id; | |
eb5d44eb | 213 | }; |
214 | ||
215 | /* te ipv4 reachability */ | |
d62a17ae | 216 | struct te_ipv4_reachability { |
217 | u_int32_t te_metric; | |
218 | u_char control; | |
219 | u_char prefix_start; /* since this is variable length by nature it only | |
9d303b37 | 220 | */ |
d62a17ae | 221 | }; /* points to an approximate location */ |
eb5d44eb | 222 | |
0de64cbb | 223 | #define TE_IPV4_HAS_SUBTLV (0x40) |
eb5d44eb | 224 | |
d62a17ae | 225 | struct idrp_info { |
226 | u_char len; | |
227 | u_char *value; | |
eb5d44eb | 228 | }; |
229 | ||
d62a17ae | 230 | struct ipv6_reachability { |
231 | u_int32_t metric; | |
232 | u_char control_info; | |
233 | u_char prefix_len; | |
234 | u_char prefix[16]; | |
eb5d44eb | 235 | }; |
eb5d44eb | 236 | |
237 | /* bits in control_info */ | |
238 | #define CTRL_INFO_DIRECTION 0x80 | |
f3ccedaa CF |
239 | #define DIRECTION_UP 0x00 |
240 | #define DIRECTION_DOWN 0x80 | |
241 | ||
eb5d44eb | 242 | #define CTRL_INFO_DISTRIBUTION 0x40 |
f3ccedaa CF |
243 | #define DISTRIBUTION_INTERNAL 0x00 |
244 | #define DISTRIBUTION_EXTERNAL 0x40 | |
245 | ||
eb5d44eb | 246 | #define CTRL_INFO_SUBTLVS 0x20 |
247 | ||
d62a17ae | 248 | struct mt_router_info { |
249 | ISIS_MT_INFO_FIELDS | |
250 | bool overload; | |
99894f9a CF |
251 | }; |
252 | ||
eb5d44eb | 253 | /* |
254 | * Pointer to each tlv type, filled by parse_tlvs() | |
255 | */ | |
d62a17ae | 256 | struct tlvs { |
257 | struct checksum *checksum; | |
258 | struct hostname *hostname; | |
259 | struct nlpids *nlpids; | |
260 | struct te_router_id *router_id; | |
261 | struct list *area_addrs; | |
262 | struct list *mt_router_info; | |
263 | struct list *is_neighs; | |
264 | struct list *te_is_neighs; | |
265 | struct list *mt_is_neighs; | |
266 | struct list *es_neighs; | |
267 | struct list *lsp_entries; | |
268 | struct list *prefix_neighs; | |
269 | struct list *lan_neighs; | |
270 | struct list *ipv4_addrs; | |
271 | struct list *ipv4_int_reachs; | |
272 | struct list *ipv4_ext_reachs; | |
273 | struct list *te_ipv4_reachs; | |
274 | struct list *mt_ipv4_reachs; | |
275 | struct list *ipv6_addrs; | |
276 | struct list *ipv6_reachs; | |
277 | struct list *mt_ipv6_reachs; | |
278 | struct isis_passwd auth_info; | |
eb5d44eb | 279 | }; |
280 | ||
281 | /* | |
282 | * Own definitions - used to bitmask found and expected | |
283 | */ | |
284 | ||
285 | #define TLVFLAG_AREA_ADDRS (1<<0) | |
286 | #define TLVFLAG_IS_NEIGHS (1<<1) | |
287 | #define TLVFLAG_ES_NEIGHS (1<<2) | |
288 | #define TLVFLAG_PARTITION_DESIG_LEVEL2_IS (1<<3) | |
289 | #define TLVFLAG_PREFIX_NEIGHS (1<<4) | |
290 | #define TLVFLAG_LAN_NEIGHS (1<<5) | |
291 | #define TLVFLAG_LSP_ENTRIES (1<<6) | |
292 | #define TLVFLAG_PADDING (1<<7) | |
293 | #define TLVFLAG_AUTH_INFO (1<<8) | |
294 | #define TLVFLAG_IPV4_INT_REACHABILITY (1<<9) | |
295 | #define TLVFLAG_NLPID (1<<10) | |
296 | #define TLVFLAG_IPV4_EXT_REACHABILITY (1<<11) | |
297 | #define TLVFLAG_IPV4_ADDR (1<<12) | |
298 | #define TLVFLAG_DYN_HOSTNAME (1<<13) | |
299 | #define TLVFLAG_IPV6_ADDR (1<<14) | |
300 | #define TLVFLAG_IPV6_REACHABILITY (1<<15) | |
301 | #define TLVFLAG_TE_IS_NEIGHS (1<<16) | |
302 | #define TLVFLAG_TE_IPV4_REACHABILITY (1<<17) | |
303 | #define TLVFLAG_3WAY_HELLO (1<<18) | |
304 | #define TLVFLAG_TE_ROUTER_ID (1<<19) | |
305 | #define TLVFLAG_CHECKSUM (1<<20) | |
00995cfc | 306 | #define TLVFLAG_GRACEFUL_RESTART (1<<21) |
99894f9a | 307 | #define TLVFLAG_MT_ROUTER_INFORMATION (1<<22) |
eb5d44eb | 308 | |
d62a17ae | 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, u_int32_t *expected, | |
312 | u_int32_t *found, struct tlvs *tlvs, u_int32_t *auth_tlv_offset); | |
313 | int add_tlv(u_char, u_char, u_char *, struct stream *); | |
314 | void free_tlv(void *val); | |
315 | ||
316 | int tlv_add_mt_router_info(struct list *mt_router_info, struct stream *stream); | |
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 | unsigned int tlv_add_te_is_neighs(struct list *te_is_neighs, | |
320 | struct stream *stream, void *arg); | |
321 | int tlv_add_lan_neighs(struct list *lan_neighs, struct stream *stream); | |
322 | int tlv_add_nlpid(struct nlpids *nlpids, struct stream *stream); | |
323 | int tlv_add_checksum(struct checksum *checksum, struct stream *stream); | |
324 | int tlv_add_authinfo(u_char auth_type, u_char authlen, u_char *auth_value, | |
325 | struct stream *stream); | |
326 | int tlv_add_ip_addrs(struct list *ip_addrs, struct stream *stream); | |
327 | int tlv_add_in_addr(struct in_addr *, struct stream *stream, u_char tag); | |
328 | int tlv_add_dynamic_hostname(struct hostname *hostname, 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 | unsigned int tlv_add_te_ipv4_reachs(struct list *te_ipv4_reachs, | |
333 | struct stream *stream, void *arg); | |
334 | int tlv_add_ipv6_addrs(struct list *ipv6_addrs, struct stream *stream); | |
335 | unsigned int tlv_add_ipv6_reachs(struct list *ipv6_reachs, | |
336 | struct stream *stream, void *arg); | |
337 | ||
338 | int tlv_add_padding(struct stream *stream); | |
eb5d44eb | 339 | |
340 | #endif /* _ZEBRA_ISIS_TLV_H */ |