forked from Quagga/quagga
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathisis_pdu.h
257 lines (236 loc) · 9.9 KB
/
isis_pdu.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
/*
* IS-IS Rout(e)ing protocol - isis_pdu.h
* PDU processing
*
* Copyright (C) 2001,2002 Sampo Saaristo
* Tampere University of Technology
* Institute of Communications Engineering
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public Licenseas published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _ZEBRA_ISIS_PDU_H
#define _ZEBRA_ISIS_PDU_H
/*
* ISO 9542 - 7.5,7.6
*
* ES to IS Fixed Header
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Intradomain Routeing Protocol Discriminator |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Length Indicator |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Version/Protocol ID extension |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Reserved = 0 |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | 0 | 0 | 0 | PDU Type |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Holding Time | 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Checksum | 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
*/
struct esis_fixed_hdr
{
u_char idrp;
u_char length;
u_char version;
u_char id_len;
u_char pdu_type;
u_int16_t holdtime;
u_int16_t checksum;
} __attribute__ ((packed));
#define ESIS_FIXED_HDR_LEN 9
#define ESH_PDU 2
#define ISH_PDU 4
#define RD_PDU 5
/*
* IS to IS Fixed Header
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Intradomain Routeing Protocol Discriminator |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Length Indicator |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Version/Protocol ID extension |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | R | R | R | PDU Type |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Version |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Reserved |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Maximum Area Addresses |
* +-------+-------+-------+-------+-------+-------+-------+-------+
*/
struct isis_fixed_hdr
{
u_char idrp;
u_char length;
u_char version1;
u_char id_len;
u_char pdu_type;
u_char version2;
u_char reserved;
u_char max_area_addrs;
};
#define ISIS_FIXED_HDR_LEN 8
/*
* IS-IS PDU types.
*/
#define L1_LAN_HELLO 15
#define L2_LAN_HELLO 16
/*
* L1 and L2 LAN IS to IS Hello PDU header
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Reserved | Circuit Type | 1
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + Source ID + id_len
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Holding Time | 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | PDU Lenght | 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | R | Priority | 1
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | LAN ID | id_len + 1
* +-------+-------+-------+-------+-------+-------+-------+-------+
*/
struct isis_lan_hello_hdr
{
u_char circuit_t;
u_char source_id[ISIS_SYS_ID_LEN];
u_int16_t hold_time;
u_int16_t pdu_len;
u_char prio;
u_char lan_id[ISIS_SYS_ID_LEN + 1];
} __attribute__ ((packed));
#define ISIS_LANHELLO_HDRLEN 19
#define P2P_HELLO 17
/*
* Point-to-point IS to IS hello PDU header
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Reserved | Circuit Type | 1
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + Source ID + id_len
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + Holding Time + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + PDU Lenght + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Local Circuit ID | 1
* +-------+-------+-------+-------+-------+-------+-------+-------+
*/
struct isis_p2p_hello_hdr
{
u_char circuit_t;
u_char source_id[ISIS_SYS_ID_LEN];
u_int16_t hold_time;
u_int16_t pdu_len;
u_char local_id;
} __attribute__ ((packed));
#define ISIS_P2PHELLO_HDRLEN 12
#define L1_LINK_STATE 18
#define L2_LINK_STATE 20
/*
* L1 and L2 IS to IS link state PDU header
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + PDU Length + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + Remaining Lifetime + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | LSP ID | id_len + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + Sequence Number + 4
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + Checksum + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | P | ATT |LSPDBOL| ISTYPE |
* +-------+-------+-------+-------+-------+-------+-------+-------+
*/
struct isis_link_state_hdr
{
u_int16_t pdu_len;
u_int16_t rem_lifetime;
u_char lsp_id[ISIS_SYS_ID_LEN + 2];
u_int32_t seq_num;
u_int16_t checksum;
u_int8_t lsp_bits;
} __attribute__ ((packed));
#define ISIS_LSP_HDR_LEN 19
#define L1_COMPLETE_SEQ_NUM 24
#define L2_COMPLETE_SEQ_NUM 25
/*
* L1 and L2 IS to IS complete sequence numbers PDU header
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + PDU Lenght + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + Source ID + id_len + 1
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + Start LSP ID + id_len + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + End LSP ID + id_len + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
*/
struct isis_complete_seqnum_hdr
{
u_int16_t pdu_len;
u_char source_id[ISIS_SYS_ID_LEN + 1];
u_char start_lsp_id[ISIS_SYS_ID_LEN + 2];
u_char stop_lsp_id[ISIS_SYS_ID_LEN + 2];
};
#define ISIS_CSNP_HDRLEN 25
#define L1_PARTIAL_SEQ_NUM 26
#define L2_PARTIAL_SEQ_NUM 27
/*
* L1 and L2 IS to IS partial sequence numbers PDU header
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + PDU Length + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + Source ID + id_len + 1
* +---------------------------------------------------------------+
*/
struct isis_partial_seqnum_hdr
{
u_int16_t pdu_len;
u_char source_id[ISIS_SYS_ID_LEN + 1];
};
#define ISIS_PSNP_HDRLEN 9
/*
* Function for receiving IS-IS PDUs
*/
int isis_receive (struct thread *thread);
/*
* calling arguments for snp_process ()
*/
#define ISIS_SNP_PSNP_FLAG 0
#define ISIS_SNP_CSNP_FLAG 1
/*
* Sending functions
*/
int send_lan_l1_hello (struct thread *thread);
int send_lan_l2_hello (struct thread *thread);
int send_p2p_hello (struct thread *thread);
int send_csnp (struct isis_circuit *circuit, int level);
int send_l1_csnp (struct thread *thread);
int send_l2_csnp (struct thread *thread);
int send_l1_psnp (struct thread *thread);
int send_l2_psnp (struct thread *thread);
int send_lsp (struct thread *thread);
int ack_lsp (struct isis_link_state_hdr *hdr,
struct isis_circuit *circuit, int level);
void fill_fixed_hdr (struct isis_fixed_hdr *hdr, u_char pdu_type);
int send_hello (struct isis_circuit *circuit, int level);
int authentication_check (struct isis_passwd *one,
struct isis_passwd *theother);
#endif /* _ZEBRA_ISIS_PDU_H */