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 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: * Restart TLV 211 y n n RFC3847
54: * MT IS Reachability 222 n y n RFC5120
55: * MT Supported 229 y y n RFC5120
56: * IPv6 Interface Address 232 y y n RFC5308
57: * MT IP Reachability 235 n y n RFC5120
58: * IPv6 IP Reachability 236 n y n RFC5308
59: * MT IPv6 IP Reachability 237 n y n RFC5120
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 RFC5305
70: * Link Local/Remote Identifiers 4 RFC5307
71: * IPv4 interface address 6 RFC5305
72: * IPv4 neighbor address 8 RFC5305
73: * Maximum link bandwidth 9 RFC5305
74: * Reservable link bandwidth 10 RFC5305
75: * Unreserved bandwidth 11 RFC5305
76: * TE Default metric 18 RFC5305
77: * Link Protection Type 20 RFC5307
78: * Interface Switching Capability 21 RFC5307
79: *
80: *
81: * IP Reachability sub-TLVs we (should) support.
82: * ____________________________________________________________________________
83: * Name Value Status
84: * ____________________________________________________________________________
85: * 32bit administrative tag 1 RFC5130
86: * 64bit administrative tag 2 RFC5130
87: * Management prefix color 117 RFC5120
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 AUTH_INFO_HDRLEN 3
114:
115: #define IS_NEIGHBOURS_LEN (ISIS_SYS_ID_LEN + 5)
116: #define LAN_NEIGHBOURS_LEN 6
117: #define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN) /* FIXME: should be entry */
118: #define IPV4_REACH_LEN 12
119: #define IPV6_REACH_LEN 22
120: #define TE_IPV4_REACH_LEN 9
121:
122: /* struct for neighbor */
123: struct is_neigh
124: {
125: struct metric metrics;
126: u_char neigh_id[ISIS_SYS_ID_LEN + 1];
127: };
128:
129: /* struct for te is neighbor */
130: struct te_is_neigh
131: {
132: u_char neigh_id[ISIS_SYS_ID_LEN + 1];
133: u_char te_metric[3];
134: u_char sub_tlvs_length;
135: };
136:
137: /* Decode and encode three-octet metric into host byte order integer */
138: #define GET_TE_METRIC(t) \
139: (((unsigned)(t)->te_metric[0]<<16) | ((t)->te_metric[1]<<8) | \
140: (t)->te_metric[2])
141: #define SET_TE_METRIC(t, m) \
142: (((t)->te_metric[0] = (m) >> 16), \
143: ((t)->te_metric[1] = (m) >> 8), \
144: ((t)->te_metric[2] = (m)))
145:
146: /* struct for es neighbors */
147: struct es_neigh
148: {
149: struct metric metrics;
150: /* approximate position of first, we use the
151: * length ((uchar*)metric-1) to know all */
152: u_char first_es_neigh[ISIS_SYS_ID_LEN];
153:
154: };
155:
156: struct partition_desig_level2_is
157: {
158: struct list *isis_system_ids;
159: };
160:
161: /* struct for lan neighbors */
162: struct lan_neigh
163: {
164: u_char LAN_addr[6];
165: };
166:
167: #ifdef __SUNPRO_C
168: #pragma pack(1)
169: #endif
170:
171: /* struct for LSP entry */
172: struct lsp_entry
173: {
174: u_int16_t rem_lifetime;
175: u_char lsp_id[ISIS_SYS_ID_LEN + 2];
176: u_int32_t seq_num;
177: u_int16_t checksum;
178: } __attribute__ ((packed));
179:
180: #ifdef __SUNPRO_C
181: #pragma pack()
182: #endif
183:
184: /* struct for checksum */
185: struct checksum
186: {
187: u_int16_t checksum;
188: };
189:
190: /* ipv4 reachability */
191: struct ipv4_reachability
192: {
193: struct metric metrics;
194: struct in_addr prefix;
195: struct in_addr mask;
196: };
197:
198: /* te router id */
199: struct te_router_id
200: {
201: struct in_addr id;
202: };
203:
204: /* te ipv4 reachability */
205: struct te_ipv4_reachability
206: {
207: u_int32_t te_metric;
208: u_char control;
209: u_char prefix_start; /* since this is variable length by nature it only */
210: }; /* points to an approximate location */
211:
212:
213:
214: struct idrp_info
215: {
216: u_char len;
217: u_char *value;
218: };
219:
220: #ifdef HAVE_IPV6
221: struct ipv6_reachability
222: {
223: u_int32_t metric;
224: u_char control_info;
225: u_char prefix_len;
226: u_char prefix[16];
227: };
228:
229: /* bits in control_info */
230: #define CTRL_INFO_DIRECTION 0x80
231: #define DIRECTION_UP 0
232: #define DIRECTION_DOWN 1
233: #define CTRL_INFO_DISTRIBUTION 0x40
234: #define DISTRIBUTION_INTERNAL 0
235: #define DISTRIBUTION_EXTERNAL 1
236: #define CTRL_INFO_SUBTLVS 0x20
237: #endif /* HAVE_IPV6 */
238:
239: /*
240: * Pointer to each tlv type, filled by parse_tlvs()
241: */
242: struct tlvs
243: {
244: struct checksum *checksum;
245: struct hostname *hostname;
246: struct nlpids *nlpids;
247: struct te_router_id *router_id;
248: struct list *area_addrs;
249: struct list *is_neighs;
250: struct list *te_is_neighs;
251: struct list *es_neighs;
252: struct list *lsp_entries;
253: struct list *prefix_neighs;
254: struct list *lan_neighs;
255: struct list *ipv4_addrs;
256: struct list *ipv4_int_reachs;
257: struct list *ipv4_ext_reachs;
258: struct list *te_ipv4_reachs;
259: #ifdef HAVE_IPV6
260: struct list *ipv6_addrs;
261: struct list *ipv6_reachs;
262: #endif
263: struct isis_passwd auth_info;
264: };
265:
266: /*
267: * Own definitions - used to bitmask found and expected
268: */
269:
270: #define TLVFLAG_AREA_ADDRS (1<<0)
271: #define TLVFLAG_IS_NEIGHS (1<<1)
272: #define TLVFLAG_ES_NEIGHS (1<<2)
273: #define TLVFLAG_PARTITION_DESIG_LEVEL2_IS (1<<3)
274: #define TLVFLAG_PREFIX_NEIGHS (1<<4)
275: #define TLVFLAG_LAN_NEIGHS (1<<5)
276: #define TLVFLAG_LSP_ENTRIES (1<<6)
277: #define TLVFLAG_PADDING (1<<7)
278: #define TLVFLAG_AUTH_INFO (1<<8)
279: #define TLVFLAG_IPV4_INT_REACHABILITY (1<<9)
280: #define TLVFLAG_NLPID (1<<10)
281: #define TLVFLAG_IPV4_EXT_REACHABILITY (1<<11)
282: #define TLVFLAG_IPV4_ADDR (1<<12)
283: #define TLVFLAG_DYN_HOSTNAME (1<<13)
284: #define TLVFLAG_IPV6_ADDR (1<<14)
285: #define TLVFLAG_IPV6_REACHABILITY (1<<15)
286: #define TLVFLAG_TE_IS_NEIGHS (1<<16)
287: #define TLVFLAG_TE_IPV4_REACHABILITY (1<<17)
288: #define TLVFLAG_3WAY_HELLO (1<<18)
289: #define TLVFLAG_TE_ROUTER_ID (1<<19)
290: #define TLVFLAG_CHECKSUM (1<<20)
291: #define TLVFLAG_GRACEFUL_RESTART (1<<21)
292:
293: void init_tlvs (struct tlvs *tlvs, uint32_t expected);
294: void free_tlvs (struct tlvs *tlvs);
295: int parse_tlvs (char *areatag, u_char * stream, int size,
296: u_int32_t * expected, u_int32_t * found, struct tlvs *tlvs,
297: u_int32_t * auth_tlv_offset);
298: int add_tlv (u_char, u_char, u_char *, struct stream *);
299: void free_tlv (void *val);
300:
301: int tlv_add_area_addrs (struct list *area_addrs, struct stream *stream);
302: int tlv_add_is_neighs (struct list *is_neighs, struct stream *stream);
303: int tlv_add_te_is_neighs (struct list *te_is_neighs, struct stream *stream);
304: int tlv_add_lan_neighs (struct list *lan_neighs, struct stream *stream);
305: int tlv_add_nlpid (struct nlpids *nlpids, struct stream *stream);
306: int tlv_add_checksum (struct checksum *checksum, struct stream *stream);
307: int tlv_add_authinfo (u_char auth_type, u_char authlen, u_char *auth_value,
308: struct stream *stream);
309: int tlv_add_ip_addrs (struct list *ip_addrs, struct stream *stream);
310: int tlv_add_in_addr (struct in_addr *, struct stream *stream, u_char tag);
311: int tlv_add_dynamic_hostname (struct hostname *hostname,
312: struct stream *stream);
313: int tlv_add_lsp_entries (struct list *lsps, struct stream *stream);
314: int tlv_add_ipv4_reachs (struct list *ipv4_reachs, struct stream *stream);
315: int tlv_add_te_ipv4_reachs (struct list *te_ipv4_reachs, struct stream *stream);
316: #ifdef HAVE_IPV6
317: int tlv_add_ipv6_addrs (struct list *ipv6_addrs, struct stream *stream);
318: int tlv_add_ipv6_reachs (struct list *ipv6_reachs, struct stream *stream);
319: #endif /* HAVE_IPV6 */
320:
321: int tlv_add_padding (struct stream *stream);
322:
323: #endif /* _ZEBRA_ISIS_TLV_H */
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