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* prefix.[hc]: Pass argument to the inet6_ntoa by value making it more
[mirror_frr.git] / isisd / isis_pdu.h
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eb5d44eb 1/*
2 * IS-IS Rout(e)ing protocol - isis_pdu.h
3 * PDU processing
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_PDU_H
25#define _ZEBRA_ISIS_PDU_H
26
27/*
28 * ISO 9542 - 7.5,7.6
29 *
30 * ES to IS Fixed Header
31 * +-------+-------+-------+-------+-------+-------+-------+-------+
32 * | Intradomain Routeing Protocol Discriminator |
33 * +-------+-------+-------+-------+-------+-------+-------+-------+
34 * | Length Indicator |
35 * +-------+-------+-------+-------+-------+-------+-------+-------+
36 * | Version/Protocol ID extension |
37 * +-------+-------+-------+-------+-------+-------+-------+-------+
38 * | Reserved = 0 |
39 * +-------+-------+-------+-------+-------+-------+-------+-------+
40 * | 0 | 0 | 0 | PDU Type |
41 * +-------+-------+-------+-------+-------+-------+-------+-------+
42 * | Holding Time | 2
43 * +-------+-------+-------+-------+-------+-------+-------+-------+
44 * | Checksum | 2
45 * +-------+-------+-------+-------+-------+-------+-------+-------+
46 */
47
48struct esis_fixed_hdr
49{
50 u_char idrp;
51 u_char length;
52 u_char version;
53 u_char id_len;
54 u_char pdu_type;
55 u_int16_t holdtime;
56 u_int16_t checksum;
f390d2c7 57} __attribute__ ((packed));
eb5d44eb 58
59#define ESIS_FIXED_HDR_LEN 9
60
61#define ESH_PDU 2
62#define ISH_PDU 4
63#define RD_PDU 5
64
65/*
66 * IS to IS Fixed Header
67 * +-------+-------+-------+-------+-------+-------+-------+-------+
68 * | Intradomain Routeing Protocol Discriminator |
69 * +-------+-------+-------+-------+-------+-------+-------+-------+
70 * | Length Indicator |
71 * +-------+-------+-------+-------+-------+-------+-------+-------+
72 * | Version/Protocol ID extension |
73 * +-------+-------+-------+-------+-------+-------+-------+-------+
74 * | R | R | R | PDU Type |
75 * +-------+-------+-------+-------+-------+-------+-------+-------+
76 * | Version |
77 * +-------+-------+-------+-------+-------+-------+-------+-------+
78 * | Reserved |
79 * +-------+-------+-------+-------+-------+-------+-------+-------+
80 * | Maximum Area Addresses |
81 * +-------+-------+-------+-------+-------+-------+-------+-------+
82 */
83
f390d2c7 84struct isis_fixed_hdr
eb5d44eb 85{
86 u_char idrp;
87 u_char length;
88 u_char version1;
89 u_char id_len;
90 u_char pdu_type;
91 u_char version2;
92 u_char reserved;
93 u_char max_area_addrs;
94};
95
96#define ISIS_FIXED_HDR_LEN 8
97
98/*
99 * IS-IS PDU types.
100 */
101
102#define L1_LAN_HELLO 15
103#define L2_LAN_HELLO 16
104/*
105 * L1 and L2 LAN IS to IS Hello PDU header
106 * +-------+-------+-------+-------+-------+-------+-------+-------+
107 * | Reserved | Circuit Type | 1
108 * +-------+-------+-------+-------+-------+-------+-------+-------+
109 * + Source ID + id_len
110 * +-------+-------+-------+-------+-------+-------+-------+-------+
111 * | Holding Time | 2
112 * +-------+-------+-------+-------+-------+-------+-------+-------+
113 * | PDU Lenght | 2
114 * +-------+-------+-------+-------+-------+-------+-------+-------+
115 * | R | Priority | 1
116 * +-------+-------+-------+-------+-------+-------+-------+-------+
117 * | LAN ID | id_len + 1
118 * +-------+-------+-------+-------+-------+-------+-------+-------+
119 */
f390d2c7 120struct isis_lan_hello_hdr
121{
122 u_char circuit_t;
123 u_char source_id[ISIS_SYS_ID_LEN];
124 u_int16_t hold_time;
125 u_int16_t pdu_len;
126 u_char prio;
127 u_char lan_id[ISIS_SYS_ID_LEN + 1];
128} __attribute__ ((packed));
eb5d44eb 129#define ISIS_LANHELLO_HDRLEN 19
130
131#define P2P_HELLO 17
132/*
133 * Point-to-point IS to IS hello PDU header
134 * +-------+-------+-------+-------+-------+-------+-------+-------+
135 * | Reserved | Circuit Type | 1
136 * +-------+-------+-------+-------+-------+-------+-------+-------+
137 * + Source ID + id_len
138 * +-------+-------+-------+-------+-------+-------+-------+-------+
139 * + Holding Time + 2
140 * +-------+-------+-------+-------+-------+-------+-------+-------+
141 * + PDU Lenght + 2
142 * +-------+-------+-------+-------+-------+-------+-------+-------+
143 * | Local Circuit ID | 1
144 * +-------+-------+-------+-------+-------+-------+-------+-------+
145 */
f390d2c7 146struct isis_p2p_hello_hdr
147{
148 u_char circuit_t;
149 u_char source_id[ISIS_SYS_ID_LEN];
150 u_int16_t hold_time;
151 u_int16_t pdu_len;
eb5d44eb 152 u_char local_id;
f390d2c7 153} __attribute__ ((packed));
eb5d44eb 154#define ISIS_P2PHELLO_HDRLEN 12
155
156#define L1_LINK_STATE 18
157#define L2_LINK_STATE 20
158/*
159 * L1 and L2 IS to IS link state PDU header
160 * +-------+-------+-------+-------+-------+-------+-------+-------+
161 * + PDU Length + 2
162 * +-------+-------+-------+-------+-------+-------+-------+-------+
163 * + Remaining Lifetime + 2
164 * +-------+-------+-------+-------+-------+-------+-------+-------+
165 * | LSP ID | id_len + 2
166 * +-------+-------+-------+-------+-------+-------+-------+-------+
167 * + Sequence Number + 4
168 * +-------+-------+-------+-------+-------+-------+-------+-------+
169 * + Checksum + 2
170 * +-------+-------+-------+-------+-------+-------+-------+-------+
171 * | P | ATT |LSPDBOL| ISTYPE |
172 * +-------+-------+-------+-------+-------+-------+-------+-------+
173 */
f390d2c7 174struct isis_link_state_hdr
175{
176 u_int16_t pdu_len;
eb5d44eb 177 u_int16_t rem_lifetime;
f390d2c7 178 u_char lsp_id[ISIS_SYS_ID_LEN + 2];
eb5d44eb 179 u_int32_t seq_num;
180 u_int16_t checksum;
f390d2c7 181 u_int8_t lsp_bits;
182} __attribute__ ((packed));
eb5d44eb 183#define ISIS_LSP_HDR_LEN 19
184
185#define L1_COMPLETE_SEQ_NUM 24
186#define L2_COMPLETE_SEQ_NUM 25
187/*
188 * L1 and L2 IS to IS complete sequence numbers PDU header
189 * +-------+-------+-------+-------+-------+-------+-------+-------+
190 * + PDU Lenght + 2
191 * +-------+-------+-------+-------+-------+-------+-------+-------+
192 * + Source ID + id_len + 1
193 * +-------+-------+-------+-------+-------+-------+-------+-------+
194 * + Start LSP ID + id_len + 2
195 * +-------+-------+-------+-------+-------+-------+-------+-------+
196 * + End LSP ID + id_len + 2
197 * +-------+-------+-------+-------+-------+-------+-------+-------+
198 */
f390d2c7 199struct isis_complete_seqnum_hdr
200{
eb5d44eb 201 u_int16_t pdu_len;
f390d2c7 202 u_char source_id[ISIS_SYS_ID_LEN + 1];
203 u_char start_lsp_id[ISIS_SYS_ID_LEN + 2];
204 u_char stop_lsp_id[ISIS_SYS_ID_LEN + 2];
eb5d44eb 205};
206#define ISIS_CSNP_HDRLEN 25
207
208#define L1_PARTIAL_SEQ_NUM 26
209#define L2_PARTIAL_SEQ_NUM 27
210/*
211 * L1 and L2 IS to IS partial sequence numbers PDU header
212 * +-------+-------+-------+-------+-------+-------+-------+-------+
213 * + PDU Length + 2
214 * +-------+-------+-------+-------+-------+-------+-------+-------+
215 * + Source ID + id_len + 1
216 * +---------------------------------------------------------------+
217 */
f390d2c7 218struct isis_partial_seqnum_hdr
219{
eb5d44eb 220 u_int16_t pdu_len;
f390d2c7 221 u_char source_id[ISIS_SYS_ID_LEN + 1];
eb5d44eb 222};
223#define ISIS_PSNP_HDRLEN 9
224
225/*
226 * Function for receiving IS-IS PDUs
227 */
228int isis_receive (struct thread *thread);
229
230/*
231 * calling arguments for snp_process ()
232 */
233#define ISIS_SNP_PSNP_FLAG 0
234#define ISIS_SNP_CSNP_FLAG 1
235
236/*
237 * Sending functions
238 */
f390d2c7 239int send_lan_l1_hello (struct thread *thread);
240int send_lan_l2_hello (struct thread *thread);
241int send_p2p_hello (struct thread *thread);
242int send_csnp (struct isis_circuit *circuit, int level);
243int send_l1_csnp (struct thread *thread);
244int send_l2_csnp (struct thread *thread);
245int send_l1_psnp (struct thread *thread);
246int send_l2_psnp (struct thread *thread);
247int send_lsp (struct thread *thread);
248int ack_lsp (struct isis_link_state_hdr *hdr,
249 struct isis_circuit *circuit, int level);
250void fill_fixed_hdr (struct isis_fixed_hdr *hdr, u_char pdu_type);
251int send_hello (struct isis_circuit *circuit, int level);
eb5d44eb 252
253
f390d2c7 254int authentication_check (struct isis_passwd *one,
eb5d44eb 255 struct isis_passwd *theother);
256
257#endif /* _ZEBRA_ISIS_PDU_H */
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