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: * The list of TLVs we (should) support.
29: * ____________________________________________________________________________
30: * Name Value IIH LSP SNP Status
31: * LAN
32: * ____________________________________________________________________________
33: *
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: * TE IS Reachability 22 n y n RFC3784
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 RFC3784
50: * Extended IP Reachability 135 n y n RFC3784
51: * Dynamic Hostname 137 n y n RFC2763
52: * Shared Risk Link Group 138 n y y draft-ietf-isis-gmpls-extensions
53: * Restart TLV 211 y n n RFC3847
54: * MT IS Reachability 222 n y n draft-ietf-isis-wg-multi-topology
55: * MT Supported 229 y y n draft-ietf-isis-wg-multi-topology
56: * IPv6 Interface Address 232 y y n draft-ietf-isis_ipv6
57: * MT IP Reachability 235 n y n draft-ietf-isis-wg-multi-topology
58: * IPv6 IP Reachability 236 n y n draft-ietf-isis_ipv6
59: * MT IPv6 IP Reachability 237 n y n draft-ietf-isis-wg-multi-topology
60: * P2P Adjacency State 240 y n n RFC3373
61: * IIH Sequence Number 241 y n n draft-shen-isis-iih-sequence
62: * Router Capability 242 - - - draft-ietf-isis-caps
63: *
64: *
65: * IS Reachability sub-TLVs we (should) support.
66: * ____________________________________________________________________________
67: * Name Value Status
68: * ____________________________________________________________________________
69: * Administartive group (color) 3 RFC3784
70: * Link Local/Remote Identifiers 4 draft-ietf-isis-gmpls-extensions
71: * IPv4 interface address 6 RFC3784
72: * IPv4 neighbor address 8 RFC3784
73: * Maximum link bandwidth 9 RFC3784
74: * Reservable link bandwidth 10 RFC3784
75: * Unreserved bandwidth 11 RFC3784
76: * TE Default metric 18 RFC3784
77: * Link Protection Type 20 draft-ietf-isis-gmpls-extensions
78: * Interface Switching Capability 21 draft-ietf-isis-gmpls-extensions
79: *
80: *
81: * IP Reachability sub-TLVs we (should) support.
82: * ____________________________________________________________________________
83: * Name Value Status
84: * ____________________________________________________________________________
85: * 32bit administrative tag 1 draft-ietf-isis-admin-tags
86: * 64bit administrative tag 2 draft-ietf-isis-admin-tags
87: * Management prefix color 117 draft-ietf-isis-wg-multi-topology
88: */
89:
90: #define AREA_ADDRESSES 1
91: #define IS_NEIGHBOURS 2
92: #define ES_NEIGHBOURS 3
93: #define LAN_NEIGHBOURS 6
94: #define PADDING 8
95: #define LSP_ENTRIES 9
96: #define AUTH_INFO 10
97: #define CHECKSUM 12
98: #define TE_IS_NEIGHBOURS 22
99: #define IS_ALIAS 24
100: #define IPV4_INT_REACHABILITY 128
101: #define PROTOCOLS_SUPPORTED 129
102: #define IPV4_EXT_REACHABILITY 130
103: #define IDRP_INFO 131
104: #define IPV4_ADDR 132
105: #define TE_ROUTER_ID 134
106: #define TE_IPV4_REACHABILITY 135
107: #define DYNAMIC_HOSTNAME 137
108: #define GRACEFUL_RESTART 211
109: #define IPV6_ADDR 232
110: #define IPV6_REACHABILITY 236
111: #define WAY3_HELLO 240
112:
113: #define IS_NEIGHBOURS_LEN (ISIS_SYS_ID_LEN + 5)
114: #define LAN_NEIGHBOURS_LEN 6
115: #define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN) /* FIXME: should be entry */
116: #define IPV4_REACH_LEN 12
117: #define IPV6_REACH_LEN 22
118:
119: /* struct for neighbor */
120: struct is_neigh
121: {
122: struct metric metrics;
123: u_char neigh_id[ISIS_SYS_ID_LEN + 1];
124: };
125:
126: /* struct for te is neighbor */
127: struct te_is_neigh
128: {
129: u_char neigh_id[ISIS_SYS_ID_LEN + 1];
130: u_char te_metric[3];
131: u_char sub_tlvs_length;
132: };
133:
134: /* struct for es neighbors */
135: struct es_neigh
136: {
137: struct metric metrics;
138: /* approximate position of first, we use the
139: * length ((uchar*)metric-1) to know all */
140: u_char first_es_neigh[ISIS_SYS_ID_LEN];
141:
142: };
143:
144: struct partition_desig_level2_is
145: {
146: struct list *isis_system_ids;
147: };
148:
149: /* struct for lan neighbors */
150: struct lan_neigh
151: {
152: u_char LAN_addr[6];
153: };
154:
155: #ifdef __SUNPRO_C
156: #pragma pack(1)
157: #endif
158:
159: /* struct for LSP entry */
160: struct lsp_entry
161: {
162: u_int16_t rem_lifetime;
163: u_char lsp_id[ISIS_SYS_ID_LEN + 2];
164: u_int32_t seq_num;
165: u_int16_t checksum;
166: } __attribute__ ((packed));
167:
168: #ifdef __SUNPRO_C
169: #pragma pack()
170: #endif
171:
172: /* struct for checksum */
173: struct checksum
174: {
175: u_int16_t checksum;
176: };
177:
178: /* ipv4 reachability */
179: struct ipv4_reachability
180: {
181: struct metric metrics;
182: struct in_addr prefix;
183: struct in_addr mask;
184: };
185:
186: /* te router id */
187: struct te_router_id
188: {
189: struct in_addr id;
190: };
191:
192: /* te ipv4 reachability */
193: struct te_ipv4_reachability
194: {
195: u_int32_t te_metric;
196: u_char control;
197: u_char prefix_start; /* since this is variable length by nature it only */
198: }; /* points to an approximate location */
199:
200:
201:
202: struct idrp_info
203: {
204: u_char len;
205: u_char *value;
206: };
207:
208: #ifdef HAVE_IPV6
209: struct ipv6_reachability
210: {
211: u_int32_t metric;
212: u_char control_info;
213: u_char prefix_len;
214: u_char prefix[16];
215: };
216: #endif /* HAVE_IPV6 */
217:
218: /* bits in control_info */
219: #define CTRL_INFO_DIRECTION 0x80
220: #define DIRECTION_UP 0
221: #define DIRECTION_DOWN 1
222: #define CTRL_INFO_DISTRIBUTION 0x40
223: #define DISTRIBUTION_INTERNAL 0
224: #define DISTRIBUTION_EXTERNAL 1
225: #define CTRL_INFO_SUBTLVS 0x20
226:
227: /*
228: * Pointer to each tlv type, filled by parse_tlvs()
229: */
230: struct tlvs
231: {
232: struct list *area_addrs;
233: struct list *is_neighs;
234: struct list *te_is_neighs;
235: struct list *es_neighs;
236: struct list *lsp_entries;
237: struct list *prefix_neighs;
238: struct list *lan_neighs;
239: struct checksum *checksum;
240: struct nlpids *nlpids;
241: struct list *ipv4_addrs;
242: struct list *ipv4_int_reachs;
243: struct list *ipv4_ext_reachs;
244: struct list *te_ipv4_reachs;
245: struct hostname *hostname;
246: struct te_router_id *router_id;
247: #ifdef HAVE_IPV6
248: struct list *ipv6_addrs;
249: struct list *ipv6_reachs;
250: #endif
251: struct isis_passwd auth_info;
252: };
253:
254: /*
255: * Own definitions - used to bitmask found and expected
256: */
257:
258: #define TLVFLAG_AREA_ADDRS (1<<0)
259: #define TLVFLAG_IS_NEIGHS (1<<1)
260: #define TLVFLAG_ES_NEIGHS (1<<2)
261: #define TLVFLAG_PARTITION_DESIG_LEVEL2_IS (1<<3)
262: #define TLVFLAG_PREFIX_NEIGHS (1<<4)
263: #define TLVFLAG_LAN_NEIGHS (1<<5)
264: #define TLVFLAG_LSP_ENTRIES (1<<6)
265: #define TLVFLAG_PADDING (1<<7)
266: #define TLVFLAG_AUTH_INFO (1<<8)
267: #define TLVFLAG_IPV4_INT_REACHABILITY (1<<9)
268: #define TLVFLAG_NLPID (1<<10)
269: #define TLVFLAG_IPV4_EXT_REACHABILITY (1<<11)
270: #define TLVFLAG_IPV4_ADDR (1<<12)
271: #define TLVFLAG_DYN_HOSTNAME (1<<13)
272: #define TLVFLAG_IPV6_ADDR (1<<14)
273: #define TLVFLAG_IPV6_REACHABILITY (1<<15)
274: #define TLVFLAG_TE_IS_NEIGHS (1<<16)
275: #define TLVFLAG_TE_IPV4_REACHABILITY (1<<17)
276: #define TLVFLAG_3WAY_HELLO (1<<18)
277: #define TLVFLAG_TE_ROUTER_ID (1<<19)
278: #define TLVFLAG_CHECKSUM (1<<20)
279: #define TLVFLAG_GRACEFUL_RESTART (1<<21)
280:
281: void init_tlvs (struct tlvs *tlvs, uint32_t expected);
282: void free_tlvs (struct tlvs *tlvs);
283: int parse_tlvs (char *areatag, u_char * stream, int size,
284: u_int32_t * expected, u_int32_t * found, struct tlvs *tlvs);
285: void free_tlv (void *val);
286:
287: int tlv_add_area_addrs (struct list *area_addrs, struct stream *stream);
288: int tlv_add_is_neighs (struct list *is_neighs, struct stream *stream);
289: int tlv_add_te_is_neighs (struct list *te_is_neighs, struct stream *stream);
290: int tlv_add_lan_neighs (struct list *lan_neighs, struct stream *stream);
291: int tlv_add_nlpid (struct nlpids *nlpids, struct stream *stream);
292: int tlv_add_checksum (struct checksum *checksum, struct stream *stream);
293: int tlv_add_authinfo (char auth_type, char authlen, u_char *auth_value,
294: struct stream *stream);
295: int tlv_add_ip_addrs (struct list *ip_addrs, struct stream *stream);
296: int tlv_add_in_addr (struct in_addr *, struct stream *stream, u_char tag);
297: int tlv_add_dynamic_hostname (struct hostname *hostname,
298: struct stream *stream);
299: int tlv_add_lsp_entries (struct list *lsps, struct stream *stream);
300: int tlv_add_ipv4_reachs (struct list *ipv4_reachs, struct stream *stream);
301: int tlv_add_te_ipv4_reachs (struct list *te_ipv4_reachs, struct stream *stream);
302: #ifdef HAVE_IPV6
303: int tlv_add_ipv6_addrs (struct list *ipv6_addrs, struct stream *stream);
304: int tlv_add_ipv6_reachs (struct list *ipv6_reachs, struct stream *stream);
305: #endif /* HAVE_IPV6 */
306:
307: int tlv_add_padding (struct stream *stream);
308:
309: #endif /* _ZEBRA_ISIS_TLV_H */
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