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eb5d44eb | 1 | /* |
2 | * IS-IS Rout(e)ing protocol - isis_events.h | |
3 | * | |
4 | * Copyright (C) 2001,2002 Sampo Saaristo | |
5 | * Tampere University of Technology | |
6 | * Institute of Communications Engineering | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public Licenseas published by the Free | |
10 | * Software Foundation; either version 2 of the License, or (at your option) | |
11 | * any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful,but WITHOUT | |
14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
16 | * more details. | |
17 | ||
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
21 | */ | |
eb5d44eb | 22 | #include <zebra.h> |
eb5d44eb | 23 | |
24 | #include "log.h" | |
25 | #include "memory.h" | |
26 | #include "if.h" | |
27 | #include "linklist.h" | |
28 | #include "command.h" | |
29 | #include "thread.h" | |
30 | #include "hash.h" | |
31 | #include "prefix.h" | |
32 | #include "stream.h" | |
3f045a08 | 33 | #include "table.h" |
eb5d44eb | 34 | |
35 | #include "isisd/dict.h" | |
36 | #include "isisd/include-netbsd/iso.h" | |
37 | #include "isisd/isis_constants.h" | |
38 | #include "isisd/isis_common.h" | |
3f045a08 | 39 | #include "isisd/isis_flags.h" |
eb5d44eb | 40 | #include "isisd/isis_circuit.h" |
41 | #include "isisd/isis_tlv.h" | |
42 | #include "isisd/isis_lsp.h" | |
43 | #include "isisd/isis_pdu.h" | |
44 | #include "isisd/isis_network.h" | |
45 | #include "isisd/isis_misc.h" | |
46 | #include "isisd/isis_constants.h" | |
47 | #include "isisd/isis_adjacency.h" | |
48 | #include "isisd/isis_dr.h" | |
eb5d44eb | 49 | #include "isisd/isisd.h" |
50 | #include "isisd/isis_csm.h" | |
51 | #include "isisd/isis_events.h" | |
52 | #include "isisd/isis_spf.h" | |
53 | ||
eb5d44eb | 54 | /* debug isis-spf spf-events |
55 | 4w4d: ISIS-Spf (tlt): L2 SPF needed, new adjacency, from 0x609229F4 | |
56 | 4w4d: ISIS-Spf (tlt): L2, 0000.0000.0042.01-00 TLV contents changed, code 0x2 | |
57 | 4w4d: ISIS-Spf (tlt): L2, new LSP 0 DEAD.BEEF.0043.00-00 | |
58 | 4w5d: ISIS-Spf (tlt): L1 SPF needed, periodic SPF, from 0x6091C844 | |
59 | 4w5d: ISIS-Spf (tlt): L2 SPF needed, periodic SPF, from 0x6091C844 | |
60 | */ | |
61 | ||
f390d2c7 | 62 | void |
3f045a08 JB |
63 | isis_event_circuit_state_change (struct isis_circuit *circuit, |
64 | struct isis_area *area, int up) | |
eb5d44eb | 65 | { |
eb5d44eb | 66 | area->circuit_state_changes++; |
f390d2c7 | 67 | |
68 | if (isis->debugs & DEBUG_EVENTS) | |
3f045a08 JB |
69 | zlog_debug ("ISIS-Evt (%s) circuit %s", area->area_tag, |
70 | up ? "up" : "down"); | |
f390d2c7 | 71 | |
eb5d44eb | 72 | /* |
73 | * Regenerate LSPs this affects | |
74 | */ | |
3f045a08 | 75 | lsp_regenerate_schedule (area, IS_LEVEL_1 | IS_LEVEL_2, 0); |
eb5d44eb | 76 | |
77 | return; | |
78 | } | |
79 | ||
92365889 | 80 | static void |
eb5d44eb | 81 | circuit_commence_level (struct isis_circuit *circuit, int level) |
82 | { | |
f390d2c7 | 83 | if (level == 1) |
84 | { | |
e38e0df0 SV |
85 | if (! circuit->is_passive) |
86 | THREAD_TIMER_ON (master, circuit->t_send_psnp[0], send_l1_psnp, circuit, | |
87 | isis_jitter (circuit->psnp_interval[0], PSNP_JITTER)); | |
f390d2c7 | 88 | |
89 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) | |
90 | { | |
f390d2c7 | 91 | THREAD_TIMER_ON (master, circuit->u.bc.t_run_dr[0], isis_run_dr_l1, |
3f045a08 | 92 | circuit, 2 * circuit->hello_interval[0]); |
f390d2c7 | 93 | |
94 | THREAD_TIMER_ON (master, circuit->u.bc.t_send_lan_hello[0], | |
95 | send_lan_l1_hello, circuit, | |
96 | isis_jitter (circuit->hello_interval[0], | |
97 | IIH_JITTER)); | |
98 | ||
99 | circuit->u.bc.lan_neighs[0] = list_new (); | |
100 | } | |
eb5d44eb | 101 | } |
f390d2c7 | 102 | else |
103 | { | |
e38e0df0 SV |
104 | if (! circuit->is_passive) |
105 | THREAD_TIMER_ON (master, circuit->t_send_psnp[1], send_l2_psnp, circuit, | |
106 | isis_jitter (circuit->psnp_interval[1], PSNP_JITTER)); | |
f390d2c7 | 107 | |
108 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) | |
109 | { | |
f390d2c7 | 110 | THREAD_TIMER_ON (master, circuit->u.bc.t_run_dr[1], isis_run_dr_l2, |
a211d65d | 111 | circuit, 2 * circuit->hello_interval[1]); |
f390d2c7 | 112 | |
113 | THREAD_TIMER_ON (master, circuit->u.bc.t_send_lan_hello[1], | |
114 | send_lan_l2_hello, circuit, | |
115 | isis_jitter (circuit->hello_interval[1], | |
116 | IIH_JITTER)); | |
117 | ||
118 | circuit->u.bc.lan_neighs[1] = list_new (); | |
119 | } | |
eb5d44eb | 120 | } |
f390d2c7 | 121 | |
eb5d44eb | 122 | return; |
123 | } | |
124 | ||
92365889 | 125 | static void |
eb5d44eb | 126 | circuit_resign_level (struct isis_circuit *circuit, int level) |
127 | { | |
128 | int idx = level - 1; | |
f390d2c7 | 129 | |
130 | THREAD_TIMER_OFF (circuit->t_send_csnp[idx]); | |
131 | THREAD_TIMER_OFF (circuit->t_send_psnp[idx]); | |
132 | ||
133 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) | |
134 | { | |
135 | THREAD_TIMER_OFF (circuit->u.bc.t_send_lan_hello[idx]); | |
136 | THREAD_TIMER_OFF (circuit->u.bc.t_run_dr[idx]); | |
13fb40ac | 137 | THREAD_TIMER_OFF (circuit->u.bc.t_refresh_pseudo_lsp[idx]); |
414766a1 | 138 | circuit->lsp_regenerate_pending[idx] = 0; |
f390d2c7 | 139 | circuit->u.bc.run_dr_elect[idx] = 0; |
cd4ab724 | 140 | if (circuit->u.bc.lan_neighs[idx] != NULL) { |
141 | list_delete (circuit->u.bc.lan_neighs[idx]); | |
142 | circuit->u.bc.lan_neighs[idx] = NULL; | |
143 | } | |
f390d2c7 | 144 | } |
145 | ||
eb5d44eb | 146 | return; |
147 | } | |
148 | ||
f390d2c7 | 149 | void |
ab1f20e6 | 150 | isis_circuit_is_type_set (struct isis_circuit *circuit, int newtype) |
eb5d44eb | 151 | { |
3f045a08 JB |
152 | if (circuit->state != C_STATE_UP) |
153 | { | |
154 | circuit->is_type = newtype; | |
155 | return; | |
156 | } | |
f390d2c7 | 157 | |
158 | if (isis->debugs & DEBUG_EVENTS) | |
529d65b3 | 159 | zlog_debug ("ISIS-Evt (%s) circuit type change %s -> %s", |
f390d2c7 | 160 | circuit->area->area_tag, |
3f045a08 | 161 | circuit_t2string (circuit->is_type), |
eb5d44eb | 162 | circuit_t2string (newtype)); |
163 | ||
3f045a08 | 164 | if (circuit->is_type == newtype) |
f390d2c7 | 165 | return; /* No change */ |
166 | ||
167 | if (!(newtype & circuit->area->is_type)) | |
168 | { | |
169 | zlog_err ("ISIS-Evt (%s) circuit type change - invalid level %s because" | |
170 | " area is %s", circuit->area->area_tag, | |
171 | circuit_t2string (newtype), | |
172 | circuit_t2string (circuit->area->is_type)); | |
173 | return; | |
174 | } | |
175 | ||
11432acd | 176 | if (! circuit->is_passive) |
f390d2c7 | 177 | { |
11432acd LF |
178 | switch (circuit->is_type) |
179 | { | |
180 | case IS_LEVEL_1: | |
181 | if (newtype == IS_LEVEL_2) | |
182 | circuit_resign_level (circuit, 1); | |
183 | circuit_commence_level (circuit, 2); | |
184 | break; | |
185 | case IS_LEVEL_1_AND_2: | |
186 | if (newtype == IS_LEVEL_1) | |
187 | circuit_resign_level (circuit, 2); | |
188 | else | |
189 | circuit_resign_level (circuit, 1); | |
190 | break; | |
191 | case IS_LEVEL_2: | |
192 | if (newtype == IS_LEVEL_1) | |
193 | circuit_resign_level (circuit, 2); | |
194 | circuit_commence_level (circuit, 1); | |
195 | break; | |
196 | default: | |
197 | break; | |
198 | } | |
f390d2c7 | 199 | } |
eb5d44eb | 200 | |
3f045a08 JB |
201 | circuit->is_type = newtype; |
202 | lsp_regenerate_schedule (circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0); | |
eb5d44eb | 203 | |
204 | return; | |
205 | } | |
206 | ||
207 | /* 04/18/2002 by Gwak. */ | |
208 | /************************************************************************** | |
209 | * | |
210 | * EVENTS for LSP generation | |
211 | * | |
212 | * 1) an Adajacency or Circuit Up/Down event | |
213 | * 2) a chnage in Circuit metric | |
214 | * 3) a change in Reachable Address metric | |
215 | * 4) a change in manualAreaAddresses | |
216 | * 5) a change in systemID | |
217 | * 6) a change in DIS status | |
218 | * 7) a chnage in the waiting status | |
219 | * | |
220 | * *********************************************************************** | |
221 | * | |
222 | * current support event | |
223 | * | |
224 | * 1) Adjacency Up/Down event | |
225 | * 6) a change in DIS status | |
226 | * | |
227 | * ***********************************************************************/ | |
228 | ||
f390d2c7 | 229 | void |
eb5d44eb | 230 | isis_event_adjacency_state_change (struct isis_adjacency *adj, int newstate) |
231 | { | |
232 | /* adjacency state change event. | |
233 | * - the only proto-type was supported */ | |
f390d2c7 | 234 | |
235 | /* invalid arguments */ | |
236 | if (!adj || !adj->circuit || !adj->circuit->area) | |
237 | return; | |
238 | ||
c89c05dd | 239 | if (isis->debugs & DEBUG_EVENTS) |
240 | zlog_debug ("ISIS-Evt (%s) Adjacency State change", | |
241 | adj->circuit->area->area_tag); | |
f390d2c7 | 242 | |
eb5d44eb | 243 | /* LSP generation again */ |
3f045a08 | 244 | lsp_regenerate_schedule (adj->circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0); |
eb5d44eb | 245 | |
246 | return; | |
247 | } | |
248 | ||
249 | /* events supporting code */ | |
250 | ||
251 | int | |
252 | isis_event_dis_status_change (struct thread *thread) | |
253 | { | |
254 | struct isis_circuit *circuit; | |
f390d2c7 | 255 | |
eb5d44eb | 256 | circuit = THREAD_ARG (thread); |
f390d2c7 | 257 | |
eb5d44eb | 258 | /* invalid arguments */ |
f390d2c7 | 259 | if (!circuit || !circuit->area) |
260 | return 0; | |
c89c05dd | 261 | if (isis->debugs & DEBUG_EVENTS) |
262 | zlog_debug ("ISIS-Evt (%s) DIS status change", circuit->area->area_tag); | |
eb5d44eb | 263 | |
264 | /* LSP generation again */ | |
3f045a08 | 265 | lsp_regenerate_schedule (circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0); |
f390d2c7 | 266 | |
eb5d44eb | 267 | return 0; |
268 | } | |
269 | ||
f390d2c7 | 270 | void |
1cd80845 | 271 | isis_event_auth_failure (char *area_tag, const char *error_string, u_char *sysid) |
eb5d44eb | 272 | { |
c89c05dd | 273 | if (isis->debugs & DEBUG_EVENTS) |
274 | zlog_debug ("ISIS-Evt (%s) Authentication failure %s from %s", | |
275 | area_tag, error_string, sysid_print (sysid)); | |
f390d2c7 | 276 | |
eb5d44eb | 277 | return; |
278 | } |