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2 * IS-IS Rout(e)ing protocol - isis_events.h
4 * Copyright (C) 2001,2002 Sampo Saaristo
5 * Tampere University of Technology
6 * Institute of Communications Engineering
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)
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
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.
35 #include "isisd/dict.h"
36 #include "isisd/isis_constants.h"
37 #include "isisd/isis_common.h"
38 #include "isisd/isis_flags.h"
39 #include "isisd/isis_circuit.h"
40 #include "isisd/isis_tlv.h"
41 #include "isisd/isis_lsp.h"
42 #include "isisd/isis_pdu.h"
43 #include "isisd/isis_network.h"
44 #include "isisd/isis_misc.h"
45 #include "isisd/isis_constants.h"
46 #include "isisd/isis_adjacency.h"
47 #include "isisd/isis_dr.h"
48 #include "isisd/isisd.h"
49 #include "isisd/isis_csm.h"
50 #include "isisd/isis_events.h"
51 #include "isisd/isis_spf.h"
53 /* debug isis-spf spf-events
54 4w4d: ISIS-Spf (tlt): L2 SPF needed, new adjacency, from 0x609229F4
55 4w4d: ISIS-Spf (tlt): L2, 0000.0000.0042.01-00 TLV contents changed, code 0x2
56 4w4d: ISIS-Spf (tlt): L2, new LSP 0 DEAD.BEEF.0043.00-00
57 4w5d: ISIS-Spf (tlt): L1 SPF needed, periodic SPF, from 0x6091C844
58 4w5d: ISIS-Spf (tlt): L2 SPF needed, periodic SPF, from 0x6091C844
62 isis_event_circuit_state_change (struct isis_circuit
*circuit
,
63 struct isis_area
*area
, int up
)
65 area
->circuit_state_changes
++;
67 if (isis
->debugs
& DEBUG_EVENTS
)
68 zlog_debug ("ISIS-Evt (%s) circuit %s", area
->area_tag
,
72 * Regenerate LSPs this affects
74 lsp_regenerate_schedule (area
, IS_LEVEL_1
| IS_LEVEL_2
, 0);
80 circuit_commence_level (struct isis_circuit
*circuit
, int level
)
84 if (! circuit
->is_passive
)
85 thread_add_timer(master
, send_l1_psnp
, circuit
,
86 isis_jitter(circuit
->psnp_interval
[0], PSNP_JITTER
),
87 &circuit
->t_send_psnp
[0]);
89 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
)
91 thread_add_timer(master
, isis_run_dr_l1
, circuit
,
92 2 * circuit
->hello_interval
[0],
93 &circuit
->u
.bc
.t_run_dr
[0]);
95 thread_add_timer(master
, send_lan_l1_hello
, circuit
,
96 isis_jitter(circuit
->hello_interval
[0], IIH_JITTER
),
97 &circuit
->u
.bc
.t_send_lan_hello
[0]);
99 circuit
->u
.bc
.lan_neighs
[0] = list_new ();
104 if (! circuit
->is_passive
)
105 thread_add_timer(master
, send_l2_psnp
, circuit
,
106 isis_jitter(circuit
->psnp_interval
[1], PSNP_JITTER
),
107 &circuit
->t_send_psnp
[1]);
109 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
)
111 thread_add_timer(master
, isis_run_dr_l2
, circuit
,
112 2 * circuit
->hello_interval
[1],
113 &circuit
->u
.bc
.t_run_dr
[1]);
115 thread_add_timer(master
, send_lan_l2_hello
, circuit
,
116 isis_jitter(circuit
->hello_interval
[1], IIH_JITTER
),
117 &circuit
->u
.bc
.t_send_lan_hello
[1]);
119 circuit
->u
.bc
.lan_neighs
[1] = list_new ();
127 circuit_resign_level (struct isis_circuit
*circuit
, int level
)
131 THREAD_TIMER_OFF (circuit
->t_send_csnp
[idx
]);
132 THREAD_TIMER_OFF (circuit
->t_send_psnp
[idx
]);
134 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
)
136 THREAD_TIMER_OFF (circuit
->u
.bc
.t_send_lan_hello
[idx
]);
137 THREAD_TIMER_OFF (circuit
->u
.bc
.t_run_dr
[idx
]);
138 THREAD_TIMER_OFF (circuit
->u
.bc
.t_refresh_pseudo_lsp
[idx
]);
139 circuit
->lsp_regenerate_pending
[idx
] = 0;
140 circuit
->u
.bc
.run_dr_elect
[idx
] = 0;
141 if (circuit
->u
.bc
.lan_neighs
[idx
] != NULL
) {
142 list_delete (circuit
->u
.bc
.lan_neighs
[idx
]);
143 circuit
->u
.bc
.lan_neighs
[idx
] = NULL
;
151 isis_circuit_is_type_set (struct isis_circuit
*circuit
, int newtype
)
153 if (circuit
->state
!= C_STATE_UP
)
155 circuit
->is_type
= newtype
;
159 if (isis
->debugs
& DEBUG_EVENTS
)
160 zlog_debug ("ISIS-Evt (%s) circuit type change %s -> %s",
161 circuit
->area
->area_tag
,
162 circuit_t2string (circuit
->is_type
),
163 circuit_t2string (newtype
));
165 if (circuit
->is_type
== newtype
)
166 return; /* No change */
168 if (!(newtype
& circuit
->area
->is_type
))
170 zlog_err ("ISIS-Evt (%s) circuit type change - invalid level %s because"
171 " area is %s", circuit
->area
->area_tag
,
172 circuit_t2string (newtype
),
173 circuit_t2string (circuit
->area
->is_type
));
177 if (! circuit
->is_passive
)
179 switch (circuit
->is_type
)
182 if (newtype
== IS_LEVEL_2
)
183 circuit_resign_level (circuit
, 1);
184 circuit_commence_level (circuit
, 2);
186 case IS_LEVEL_1_AND_2
:
187 if (newtype
== IS_LEVEL_1
)
188 circuit_resign_level (circuit
, 2);
190 circuit_resign_level (circuit
, 1);
193 if (newtype
== IS_LEVEL_1
)
194 circuit_resign_level (circuit
, 2);
195 circuit_commence_level (circuit
, 1);
202 circuit
->is_type
= newtype
;
203 lsp_regenerate_schedule (circuit
->area
, IS_LEVEL_1
| IS_LEVEL_2
, 0);
208 /* 04/18/2002 by Gwak. */
209 /**************************************************************************
211 * EVENTS for LSP generation
213 * 1) an Adajacency or Circuit Up/Down event
214 * 2) a chnage in Circuit metric
215 * 3) a change in Reachable Address metric
216 * 4) a change in manualAreaAddresses
217 * 5) a change in systemID
218 * 6) a change in DIS status
219 * 7) a chnage in the waiting status
221 * ***********************************************************************
223 * current support event
225 * 1) Adjacency Up/Down event
226 * 6) a change in DIS status
228 * ***********************************************************************/
231 isis_event_adjacency_state_change (struct isis_adjacency
*adj
, int newstate
)
233 /* adjacency state change event.
234 * - the only proto-type was supported */
236 /* invalid arguments */
237 if (!adj
|| !adj
->circuit
|| !adj
->circuit
->area
)
240 if (isis
->debugs
& DEBUG_EVENTS
)
241 zlog_debug ("ISIS-Evt (%s) Adjacency State change",
242 adj
->circuit
->area
->area_tag
);
244 /* LSP generation again */
245 lsp_regenerate_schedule (adj
->circuit
->area
, IS_LEVEL_1
| IS_LEVEL_2
, 0);
250 /* events supporting code */
253 isis_event_dis_status_change (struct thread
*thread
)
255 struct isis_circuit
*circuit
;
257 circuit
= THREAD_ARG (thread
);
259 /* invalid arguments */
260 if (!circuit
|| !circuit
->area
)
262 if (isis
->debugs
& DEBUG_EVENTS
)
263 zlog_debug ("ISIS-Evt (%s) DIS status change", circuit
->area
->area_tag
);
265 /* LSP generation again */
266 lsp_regenerate_schedule (circuit
->area
, IS_LEVEL_1
| IS_LEVEL_2
, 0);
272 isis_event_auth_failure (char *area_tag
, const char *error_string
, u_char
*sysid
)
274 if (isis
->debugs
& DEBUG_EVENTS
)
275 zlog_debug ("ISIS-Evt (%s) Authentication failure %s from %s",
276 area_tag
, error_string
, sysid_print (sysid
));