* IS-IS Rout(e)ing protocol - isis_csm.c
* IS-IS circuit state machine
* Copyright (C) 2001,2002 Sampo Saaristo
- * Tampere University of Technology
+ * 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)
+ * 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
+ * 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
#include "isisd/isis_common.h"
#include "isisd/isis_flags.h"
#include "isisd/isis_circuit.h"
-#include "isisd/isis_tlv.h"
#include "isisd/isis_lsp.h"
#include "isisd/isis_pdu.h"
#include "isisd/isis_network.h"
#include "isisd/isisd.h"
#include "isisd/isis_csm.h"
#include "isisd/isis_events.h"
+#include "isisd/isis_errors.h"
extern struct isis *isis;
-static const char *csm_statestr[] = {
- "C_STATE_NA",
- "C_STATE_INIT",
- "C_STATE_CONF",
- "C_STATE_UP"
-};
+static const char *csm_statestr[] = {"C_STATE_NA", "C_STATE_INIT",
+ "C_STATE_CONF", "C_STATE_UP"};
#define STATE2STR(S) csm_statestr[S]
static const char *csm_eventstr[] = {
- "NO_STATE",
- "ISIS_ENABLE",
- "IF_UP_FROM_Z",
- "ISIS_DISABLE",
- "IF_DOWN_FROM_Z",
+ "NO_STATE", "ISIS_ENABLE", "IF_UP_FROM_Z",
+ "ISIS_DISABLE", "IF_DOWN_FROM_Z",
};
#define EVENT2STR(E) csm_eventstr[E]
struct isis_circuit *
-isis_csm_state_change (int event, struct isis_circuit *circuit, void *arg)
+isis_csm_state_change(int event, struct isis_circuit *circuit, void *arg)
{
- int old_state;
+ int old_state;
- old_state = circuit ? circuit->state : C_STATE_NA;
- if (isis->debugs & DEBUG_EVENTS)
- zlog_debug ("CSM_EVENT: %s", EVENT2STR (event));
+ old_state = circuit ? circuit->state : C_STATE_NA;
+ if (isis->debugs & DEBUG_EVENTS)
+ zlog_debug("CSM_EVENT: %s", EVENT2STR(event));
- switch (old_state)
- {
- case C_STATE_NA:
- if (circuit)
- zlog_warn ("Non-null circuit while state C_STATE_NA");
- assert (circuit == NULL);
- switch (event)
- {
- case ISIS_ENABLE:
- circuit = isis_circuit_new ();
- isis_circuit_configure (circuit, (struct isis_area *) arg);
- circuit->state = C_STATE_CONF;
- break;
- case IF_UP_FROM_Z:
- circuit = isis_circuit_new ();
- isis_circuit_if_add (circuit, (struct interface *) arg);
- listnode_add (isis->init_circ_list, circuit);
- circuit->state = C_STATE_INIT;
- break;
- case ISIS_DISABLE:
- zlog_warn ("circuit already disabled");
- break;
- case IF_DOWN_FROM_Z:
- zlog_warn ("circuit already disconnected");
- break;
- }
- break;
- case C_STATE_INIT:
- assert (circuit);
- switch (event)
- {
- case ISIS_ENABLE:
- isis_circuit_configure (circuit, (struct isis_area *) arg);
- if (isis_circuit_up (circuit) != ISIS_OK)
- {
- isis_circuit_deconfigure (circuit, (struct isis_area *) arg);
- break;
- }
- circuit->state = C_STATE_UP;
- isis_event_circuit_state_change (circuit, circuit->area, 1);
- listnode_delete (isis->init_circ_list, circuit);
- break;
- case IF_UP_FROM_Z:
- assert (circuit);
- zlog_warn ("circuit already connected");
- break;
- case ISIS_DISABLE:
- zlog_warn ("circuit already disabled");
- break;
- case IF_DOWN_FROM_Z:
- isis_circuit_if_del (circuit, (struct interface *) arg);
- listnode_delete (isis->init_circ_list, circuit);
- isis_circuit_del (circuit);
- circuit = NULL;
- break;
- }
- break;
- case C_STATE_CONF:
- assert (circuit);
- switch (event)
- {
- case ISIS_ENABLE:
- zlog_warn ("circuit already enabled");
- break;
- case IF_UP_FROM_Z:
- isis_circuit_if_add (circuit, (struct interface *) arg);
- if (isis_circuit_up (circuit) != ISIS_OK)
- {
- zlog_err("Could not bring up %s because of invalid config.",
- circuit->interface->name);
- zlog_err("Clearing config for %s. Please re-examine it.",
- circuit->interface->name);
- if (circuit->ip_router)
- {
- circuit->ip_router = 0;
- circuit->area->ip_circuits--;
- }
- if (circuit->ipv6_router)
- {
- circuit->ipv6_router = 0;
- circuit->area->ipv6_circuits--;
- }
- circuit_update_nlpids(circuit);
- isis_circuit_deconfigure(circuit, circuit->area);
- listnode_add (isis->init_circ_list, circuit);
- circuit->state = C_STATE_INIT;
- break;
- }
- circuit->state = C_STATE_UP;
- isis_event_circuit_state_change (circuit, circuit->area, 1);
- break;
- case ISIS_DISABLE:
- isis_circuit_deconfigure (circuit, (struct isis_area *) arg);
- isis_circuit_del (circuit);
- circuit = NULL;
- break;
- case IF_DOWN_FROM_Z:
- zlog_warn ("circuit already disconnected");
- break;
- }
- break;
- case C_STATE_UP:
- assert (circuit);
- switch (event)
- {
- case ISIS_ENABLE:
- zlog_warn ("circuit already configured");
- break;
- case IF_UP_FROM_Z:
- zlog_warn ("circuit already connected");
- break;
- case ISIS_DISABLE:
- isis_circuit_down (circuit);
- isis_circuit_deconfigure (circuit, (struct isis_area *) arg);
- circuit->state = C_STATE_INIT;
- isis_event_circuit_state_change (circuit,
- (struct isis_area *)arg, 0);
- listnode_add (isis->init_circ_list, circuit);
- break;
- case IF_DOWN_FROM_Z:
- isis_circuit_down (circuit);
- isis_circuit_if_del (circuit, (struct interface *) arg);
- circuit->state = C_STATE_CONF;
- isis_event_circuit_state_change (circuit, circuit->area, 0);
- break;
- }
- break;
+ switch (old_state) {
+ case C_STATE_NA:
+ if (circuit)
+ zlog_warn("Non-null circuit while state C_STATE_NA");
+ assert(circuit == NULL);
+ switch (event) {
+ case ISIS_ENABLE:
+ circuit = isis_circuit_new();
+ isis_circuit_configure(circuit,
+ (struct isis_area *)arg);
+ circuit->state = C_STATE_CONF;
+ break;
+ case IF_UP_FROM_Z:
+ circuit = isis_circuit_new();
+ isis_circuit_if_add(circuit, (struct interface *)arg);
+ listnode_add(isis->init_circ_list, circuit);
+ circuit->state = C_STATE_INIT;
+ break;
+ case ISIS_DISABLE:
+ zlog_warn("circuit already disabled");
+ break;
+ case IF_DOWN_FROM_Z:
+ zlog_warn("circuit already disconnected");
+ break;
+ }
+ break;
+ case C_STATE_INIT:
+ assert(circuit);
+ switch (event) {
+ case ISIS_ENABLE:
+ isis_circuit_configure(circuit,
+ (struct isis_area *)arg);
+ if (isis_circuit_up(circuit) != ISIS_OK) {
+ isis_circuit_deconfigure(
+ circuit, (struct isis_area *)arg);
+ break;
+ }
+ circuit->state = C_STATE_UP;
+ isis_event_circuit_state_change(circuit, circuit->area,
+ 1);
+ listnode_delete(isis->init_circ_list, circuit);
+ break;
+ case IF_UP_FROM_Z:
+ assert(circuit);
+ zlog_warn("circuit already connected");
+ break;
+ case ISIS_DISABLE:
+ zlog_warn("circuit already disabled");
+ break;
+ case IF_DOWN_FROM_Z:
+ isis_circuit_if_del(circuit, (struct interface *)arg);
+ listnode_delete(isis->init_circ_list, circuit);
+ isis_circuit_del(circuit);
+ circuit = NULL;
+ break;
+ }
+ break;
+ case C_STATE_CONF:
+ assert(circuit);
+ switch (event) {
+ case ISIS_ENABLE:
+ zlog_warn("circuit already enabled");
+ break;
+ case IF_UP_FROM_Z:
+ isis_circuit_if_add(circuit, (struct interface *)arg);
+ if (isis_circuit_up(circuit) != ISIS_OK) {
+ flog_err(
+ EC_ISIS_CONFIG,
+ "Could not bring up %s because of invalid config.",
+ circuit->interface->name);
+ flog_err(
+ EC_ISIS_CONFIG,
+ "Clearing config for %s. Please re-examine it.",
+ circuit->interface->name);
+ if (circuit->ip_router) {
+ circuit->ip_router = 0;
+ circuit->area->ip_circuits--;
+ }
+ if (circuit->ipv6_router) {
+ circuit->ipv6_router = 0;
+ circuit->area->ipv6_circuits--;
+ }
+ circuit_update_nlpids(circuit);
+ isis_circuit_deconfigure(circuit,
+ circuit->area);
+ listnode_add(isis->init_circ_list, circuit);
+ circuit->state = C_STATE_INIT;
+ break;
+ }
+ circuit->state = C_STATE_UP;
+ isis_event_circuit_state_change(circuit, circuit->area,
+ 1);
+ break;
+ case ISIS_DISABLE:
+ isis_circuit_deconfigure(circuit,
+ (struct isis_area *)arg);
+ isis_circuit_del(circuit);
+ circuit = NULL;
+ break;
+ case IF_DOWN_FROM_Z:
+ zlog_warn("circuit already disconnected");
+ break;
+ }
+ break;
+ case C_STATE_UP:
+ assert(circuit);
+ switch (event) {
+ case ISIS_ENABLE:
+ zlog_warn("circuit already configured");
+ break;
+ case IF_UP_FROM_Z:
+ zlog_warn("circuit already connected");
+ break;
+ case ISIS_DISABLE:
+ isis_circuit_down(circuit);
+ isis_circuit_deconfigure(circuit,
+ (struct isis_area *)arg);
+ circuit->state = C_STATE_INIT;
+ isis_event_circuit_state_change(
+ circuit, (struct isis_area *)arg, 0);
+ listnode_add(isis->init_circ_list, circuit);
+ break;
+ case IF_DOWN_FROM_Z:
+ isis_circuit_down(circuit);
+ isis_circuit_if_del(circuit, (struct interface *)arg);
+ circuit->state = C_STATE_CONF;
+ isis_event_circuit_state_change(circuit, circuit->area,
+ 0);
+ break;
+ }
+ break;
- default:
- zlog_warn ("Invalid circuit state %d", old_state);
- }
+ default:
+ zlog_warn("Invalid circuit state %d", old_state);
+ }
- if (isis->debugs & DEBUG_EVENTS)
- zlog_debug ("CSM_STATE_CHANGE: %s -> %s ", STATE2STR (old_state),
- circuit ? STATE2STR (circuit->state) : STATE2STR (C_STATE_NA));
+ if (isis->debugs & DEBUG_EVENTS)
+ zlog_debug("CSM_STATE_CHANGE: %s -> %s ", STATE2STR(old_state),
+ circuit ? STATE2STR(circuit->state)
+ : STATE2STR(C_STATE_NA));
- return circuit;
+ return circuit;
}
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