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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; see the file COPYING; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | #include <zebra.h> | |
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" | |
33 | #include "table.h" | |
34 | ||
35 | #include "isisd/isis_constants.h" | |
36 | #include "isisd/isis_common.h" | |
37 | #include "isisd/isis_flags.h" | |
38 | #include "isisd/isis_circuit.h" | |
39 | #include "isisd/isis_lsp.h" | |
40 | #include "isisd/isis_pdu.h" | |
41 | #include "isisd/isis_network.h" | |
42 | #include "isisd/isis_misc.h" | |
43 | #include "isisd/isis_constants.h" | |
44 | #include "isisd/isis_adjacency.h" | |
45 | #include "isisd/isis_dr.h" | |
46 | #include "isisd/isisd.h" | |
47 | #include "isisd/isis_csm.h" | |
48 | #include "isisd/isis_events.h" | |
49 | #include "isisd/isis_spf.h" | |
50 | #include "isisd/isis_errors.h" | |
51 | ||
52 | /* debug isis-spf spf-events | |
53 | 4w4d: ISIS-Spf (tlt): L2 SPF needed, new adjacency, from 0x609229F4 | |
54 | 4w4d: ISIS-Spf (tlt): L2, 0000.0000.0042.01-00 TLV contents changed, code 0x2 | |
55 | 4w4d: ISIS-Spf (tlt): L2, new LSP 0 DEAD.BEEF.0043.00-00 | |
56 | 4w5d: ISIS-Spf (tlt): L1 SPF needed, periodic SPF, from 0x6091C844 | |
57 | 4w5d: ISIS-Spf (tlt): L2 SPF needed, periodic SPF, from 0x6091C844 | |
58 | */ | |
59 | ||
60 | void isis_event_circuit_state_change(struct isis_circuit *circuit, | |
61 | struct isis_area *area, int up) | |
62 | { | |
63 | area->circuit_state_changes++; | |
64 | ||
65 | if (isis->debugs & DEBUG_EVENTS) | |
66 | zlog_debug("ISIS-Evt (%s) circuit %s", area->area_tag, | |
67 | up ? "up" : "down"); | |
68 | ||
69 | /* | |
70 | * Regenerate LSPs this affects | |
71 | */ | |
72 | lsp_regenerate_schedule(area, IS_LEVEL_1 | IS_LEVEL_2, 0); | |
73 | ||
74 | return; | |
75 | } | |
76 | ||
77 | static void circuit_commence_level(struct isis_circuit *circuit, int level) | |
78 | { | |
79 | if (!circuit->is_passive) { | |
80 | if (level == 1) { | |
81 | thread_add_timer(master, send_l1_psnp, circuit, | |
82 | isis_jitter(circuit->psnp_interval[0], | |
83 | PSNP_JITTER), | |
84 | &circuit->t_send_psnp[0]); | |
85 | } else { | |
86 | thread_add_timer(master, send_l2_psnp, circuit, | |
87 | isis_jitter(circuit->psnp_interval[1], | |
88 | PSNP_JITTER), | |
89 | &circuit->t_send_psnp[1]); | |
90 | } | |
91 | } | |
92 | ||
93 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
94 | thread_add_timer(master, isis_run_dr, | |
95 | &circuit->level_arg[level - 1], | |
96 | 2 * circuit->hello_interval[level - 1], | |
97 | &circuit->u.bc.t_run_dr[level - 1]); | |
98 | ||
99 | send_hello_sched(circuit, level, TRIGGERED_IIH_DELAY); | |
100 | circuit->u.bc.lan_neighs[level - 1] = list_new(); | |
101 | } | |
102 | } | |
103 | ||
104 | static void circuit_resign_level(struct isis_circuit *circuit, int level) | |
105 | { | |
106 | int idx = level - 1; | |
107 | ||
108 | THREAD_TIMER_OFF(circuit->t_send_csnp[idx]); | |
109 | THREAD_TIMER_OFF(circuit->t_send_psnp[idx]); | |
110 | ||
111 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
112 | THREAD_TIMER_OFF(circuit->u.bc.t_send_lan_hello[idx]); | |
113 | THREAD_TIMER_OFF(circuit->u.bc.t_run_dr[idx]); | |
114 | THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[idx]); | |
115 | circuit->lsp_regenerate_pending[idx] = 0; | |
116 | circuit->u.bc.run_dr_elect[idx] = 0; | |
117 | if (circuit->u.bc.lan_neighs[idx] != NULL) | |
118 | list_delete(&circuit->u.bc.lan_neighs[idx]); | |
119 | } | |
120 | ||
121 | return; | |
122 | } | |
123 | ||
124 | void isis_circuit_is_type_set(struct isis_circuit *circuit, int newtype) | |
125 | { | |
126 | if (circuit->state != C_STATE_UP) { | |
127 | circuit->is_type = newtype; | |
128 | return; | |
129 | } | |
130 | ||
131 | if (isis->debugs & DEBUG_EVENTS) | |
132 | zlog_debug("ISIS-Evt (%s) circuit type change %s -> %s", | |
133 | circuit->area->area_tag, | |
134 | circuit_t2string(circuit->is_type), | |
135 | circuit_t2string(newtype)); | |
136 | ||
137 | if (circuit->is_type == newtype) | |
138 | return; /* No change */ | |
139 | ||
140 | if (!(newtype & circuit->area->is_type)) { | |
141 | flog_err( | |
142 | EC_ISIS_CONFIG, | |
143 | "ISIS-Evt (%s) circuit type change - invalid level %s because area is %s", | |
144 | circuit->area->area_tag, circuit_t2string(newtype), | |
145 | circuit_t2string(circuit->area->is_type)); | |
146 | return; | |
147 | } | |
148 | ||
149 | if (!circuit->is_passive) { | |
150 | switch (circuit->is_type) { | |
151 | case IS_LEVEL_1: | |
152 | if (newtype == IS_LEVEL_2) | |
153 | circuit_resign_level(circuit, 1); | |
154 | circuit_commence_level(circuit, 2); | |
155 | break; | |
156 | case IS_LEVEL_1_AND_2: | |
157 | if (newtype == IS_LEVEL_1) | |
158 | circuit_resign_level(circuit, 2); | |
159 | else | |
160 | circuit_resign_level(circuit, 1); | |
161 | break; | |
162 | case IS_LEVEL_2: | |
163 | if (newtype == IS_LEVEL_1) | |
164 | circuit_resign_level(circuit, 2); | |
165 | circuit_commence_level(circuit, 1); | |
166 | break; | |
167 | default: | |
168 | break; | |
169 | } | |
170 | } | |
171 | ||
172 | circuit->is_type = newtype; | |
173 | lsp_regenerate_schedule(circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0); | |
174 | ||
175 | return; | |
176 | } | |
177 | ||
178 | /* 04/18/2002 by Gwak. */ | |
179 | /************************************************************************** | |
180 | * | |
181 | * EVENTS for LSP generation | |
182 | * | |
183 | * 1) an Adajacency or Circuit Up/Down event | |
184 | * 2) a chnage in Circuit metric | |
185 | * 3) a change in Reachable Address metric | |
186 | * 4) a change in manualAreaAddresses | |
187 | * 5) a change in systemID | |
188 | * 6) a change in DIS status | |
189 | * 7) a chnage in the waiting status | |
190 | * | |
191 | * *********************************************************************** | |
192 | * | |
193 | * current support event | |
194 | * | |
195 | * 1) Adjacency Up/Down event | |
196 | * 6) a change in DIS status | |
197 | * | |
198 | * ***********************************************************************/ | |
199 | ||
200 | /* events supporting code */ | |
201 | ||
202 | int isis_event_dis_status_change(struct thread *thread) | |
203 | { | |
204 | struct isis_circuit *circuit; | |
205 | ||
206 | circuit = THREAD_ARG(thread); | |
207 | ||
208 | /* invalid arguments */ | |
209 | if (!circuit || !circuit->area) | |
210 | return 0; | |
211 | if (isis->debugs & DEBUG_EVENTS) | |
212 | zlog_debug("ISIS-Evt (%s) DIS status change", | |
213 | circuit->area->area_tag); | |
214 | ||
215 | /* LSP generation again */ | |
216 | lsp_regenerate_schedule(circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0); | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | void isis_event_auth_failure(char *area_tag, const char *error_string, | |
222 | uint8_t *sysid) | |
223 | { | |
224 | if (isis->debugs & DEBUG_EVENTS) | |
225 | zlog_debug("ISIS-Evt (%s) Authentication failure %s from %s", | |
226 | area_tag, error_string, sysid_print(sysid)); | |
227 | ||
228 | return; | |
229 | } |