From eb5d44eb8dcf25a1b328e57d1eabb1f89e3bc59b Mon Sep 17 00:00:00 2001 From: jardin Date: Tue, 23 Dec 2003 08:09:43 +0000 Subject: Initial revision --- isisd/isis_csm.c | 186 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 186 insertions(+) create mode 100644 isisd/isis_csm.c (limited to 'isisd/isis_csm.c') diff --git a/isisd/isis_csm.c b/isisd/isis_csm.c new file mode 100644 index 00000000..2282bbc8 --- /dev/null +++ b/isisd/isis_csm.c @@ -0,0 +1,186 @@ +/* + * IS-IS Rout(e)ing protocol - isis_csm.c + * IS-IS circuit state machine + * 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. + */ + +#include +#include + +#include "log.h" +#include "memory.h" +#include "if.h" +#include "linklist.h" +#include "command.h" +#include "thread.h" +#include "hash.h" +#include "prefix.h" +#include "stream.h" + +#include "isisd/dict.h" +#include "isisd/include-netbsd/iso.h" +#include "isisd/isis_constants.h" +#include "isisd/isis_common.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/isis_misc.h" +#include "isisd/isis_constants.h" +#include "isisd/isis_adjacency.h" +#include "isisd/isis_dr.h" +#include "isisd/isis_flags.h" +#include "isisd/isisd.h" +#include "isisd/isis_csm.h" +#include "isisd/isis_events.h" + +extern struct isis *isis; + +static char *csm_statestr[] = +{ + "C_STATE_NA", + "C_STATE_INIT", + "C_STATE_CONF", + "C_STATE_UP" +}; + +#define STATE2STR(S) csm_statestr[S] + +static char *csm_eventstr[] = +{ + "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) +{ + int old_state; + + old_state = circuit ? circuit->state : C_STATE_NA; + + zlog_info ("CSM_EVENT: %s", EVENT2STR(event)); + + switch (old_state) { + case C_STATE_NA: + if (circuit) + zlog_warn ("Non-null circuit while state C_STATE_NA"); + 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"); + case IF_DOWN_FROM_Z: + zlog_warn ("circuit already disconnected"); + break; + } + break; + case C_STATE_INIT: + switch (event) { + case ISIS_ENABLE: + isis_circuit_configure (circuit, (struct isis_area *)arg); + isis_circuit_up (circuit); + circuit->state = C_STATE_UP; + isis_event_circuit_state_change (circuit, 1); + listnode_delete (isis->init_circ_list, circuit); + break; + case IF_UP_FROM_Z: + 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); + listnode_delete (isis->init_circ_list, circuit); + isis_circuit_del (circuit); + break; + } + break; + case C_STATE_CONF: + switch (event) { + case ISIS_ENABLE: + zlog_warn ("circuit already enabled"); + break; + case IF_UP_FROM_Z: + isis_circuit_if_add (circuit, (struct interface *)arg); + isis_circuit_up (circuit); + circuit->state = C_STATE_UP; + isis_event_circuit_state_change (circuit, 1); + break; + case ISIS_DISABLE: + isis_circuit_deconfigure (circuit, (struct isis_area *)arg); + isis_circuit_del (circuit); + break; + case IF_DOWN_FROM_Z: + zlog_warn ("circuit already disconnected"); + break; + } + break; + case C_STATE_UP: + 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_deconfigure (circuit, (struct isis_area *)arg); + listnode_add (isis->init_circ_list, circuit); + circuit->state = C_STATE_INIT; + isis_event_circuit_state_change (circuit, 0); + break; + case IF_DOWN_FROM_Z: + isis_circuit_if_del (circuit); + circuit->state = C_STATE_CONF; + isis_event_circuit_state_change (circuit, 0); + break; + } + break; + + default: + zlog_warn ("Invalid circuit state %d", old_state); + } + + zlog_info ("CSM_STATE_CHANGE: %s -> %s ", STATE2STR (old_state), + circuit ? STATE2STR (circuit->state) : STATE2STR (C_STATE_NA)); + + return circuit; +} + + + -- cgit v1.2.1