ospf_interface_state_machine.c

vxworks下ospf协议栈

/* ospf_interface_state_machine.c - interface state machine functions and tables */

/* Copyright 1984 - 2001 Wind River Systems, Inc. */

/*
modification history
--------------------
 20,12december01,kc         Invoked ospf2Mapi_request() only if interface sm is executed.
 19,13october01,kc			Dynamic configuration changes.
 18,14august01,kc			Added support for ospfVirtIfTable updates.
 17,26june01,jkw   			Moved global variables to ospf_globals.h for cleanup
 16,26september00,reshma	Added WindRiver CopyRight
 15,25september00,reshma	RFC-1587 implementation for OSPF NSSA Option, also tested against ANVL.
 14,07july00,reshma			Unix compatibility related changes.
 13,04april00,reshma		Added some MIB support (Read only).Passed all important ANVL OSPF tests.
 12,23december99,reshma		Compatibility with VxWorks-IP and VxWorks RTM-interface
 11,28december98,jack		Compiled and added some comments
 10,11november98,jack		Config changes, linted and big endian changes
 09,30october98,jack		Incorporate changes for compilation on Vxworks
 08,23august98,jack			ANVL tested OSPF with PATRICIA tree route table and no recursion
 07,10august98,jack			PATRICIA Route Table Based OSPF Code Base
 06,04june98,jack			Integration with RTM and BGP
 05,24april98,jack			RTM changes
 04,10july97,cindy			Pre-release v1.52b
 03,02october97,cindy		Release Version 1.52
 02,22october96,cindy		Release Version 1.50
 01,05june96,cindy			First Beta Release
*/

/*
DESCRIPTION
ospf_interface_state_machine.c is used for executing the interface state machine.  This file
takes in an interface event and the interface's current state and executes the interface state
machine to produce a new interface state.
This file is used whenever the interface state machine is called.
*/


#include "ospf.h"
#if defined (__OSPF_VIRTUAL_STACK__)
#include "ospf_vs_lib.h"
#endif /* __OSPF_VIRTUAL_STACK__ */

#include "ospf_interface_state_machine.h"


/*************************************************************************
*
* ospf_execute_interface_state_machine - Execute interface state machine
*
* This routine will execute the appropriate interface state machine function
* based on the interface event received and what state the interface is 
* currently in.
*
* <event> Interface event
*
* <state> Current interface state
*
* <sptr_interface> OSPF interface
*
* RETURNS: N/A
*
* ERRNO: N/A
*
* NOMANUAL
*/
void ospf_execute_interface_state_machine (enum OSPF_INTERFACE_EVENT event,enum OSPF_INTERFACE_STATE state,OSPF_INTERFACE *sptr_interface)
{
#if defined (__OPAQUE_LSA__)
	OSPF_OPAQUE_CALLBACK *sptr_opaque_callback = NULL;
	OSPF_OPAQUE_CALLBACK *sptr_next_node = NULL;
#endif /* __OPAQUE_LSA__ */

	OSPF_PRINTF_PROLOGUE (OSPF_PROLOGUE_PRINTF, "OSPF: Entering ospf_execute_interface_state_machine\r\n");

	if (ospf_interface_event_processing_table[event][state].fptr_interface_transition_function != NULL)
		{
		(*ospf_interface_event_processing_table[event][state].fptr_interface_transition_function) (sptr_interface);


#if defined (__OSPF_MIB__)
	/* tell OSPF MIB to update its operational status and statistics for this interface */
	if ( sptr_interface->type == OSPF_VIRTUAL_LINK)
        ospf2Mapi_request( (void *)sptr_interface, ospfVirtIfUpdateReqType );
	else
        ospf2Mapi_request( (void *)sptr_interface, ospfIfUpdateReqType );
#endif /* __OSPF_MIB__ */
		}

#if defined (__OPAQUE_LSA__)
	for (sptr_opaque_callback = ospf.sptr_type_9_callback_list_head; sptr_opaque_callback != NULL; sptr_opaque_callback = sptr_next_node)
		{
		sptr_next_node = sptr_opaque_callback->sptr_forward_link;
		sptr_opaque_callback->interface_state_machine_change_hook(event,state,sptr_interface);
		}
	for (sptr_opaque_callback = ospf.sptr_type_10_callback_list_head; sptr_opaque_callback != NULL; sptr_opaque_callback = sptr_next_node)
		{
		sptr_next_node = sptr_opaque_callback->sptr_forward_link;
		sptr_opaque_callback->interface_state_machine_change_hook(event,state,sptr_interface);
		}
	for (sptr_opaque_callback = ospf.sptr_type_11_callback_list_head; sptr_opaque_callback != NULL; sptr_opaque_callback = sptr_next_node)
		{
		sptr_next_node = sptr_opaque_callback->sptr_forward_link;
		sptr_opaque_callback->interface_state_machine_change_hook(event,state,sptr_interface);
		}

#endif /* __OPAQUE_LSA__ */
}