ospf_receive_utilities.c

vxworks下ospf协议栈

/* ospf_receive_utilities.c */

/* Copyright 2000 Wind River Systems, Inc. */

/*modification history
___________________
 17,20december01,jkw		Removed sptr_area->sptr_interfaces structure.
 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_receive_utilities.c is used for checking to see if the received link state advertisement is
self originated.
This file is used whenever a new OSPF link state advertisement is received.
*/

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

/********************************************************************************************************************************/
enum TEST ospf_check_if_advertisements_link_state_id_is_equal_to_one_of_the_routers_own_IP_interface_addresses (
	OSPF_ROUTER_LINK_ADVERTISEMENT_HEADER *sptr_advertisement)
{
	OSPF_AREA_ENTRY *sptr_area = NULL;
	OSPF_AREA_ENTRY *sptr_next_area = NULL;
	OSPF_INTERFACE *sptr_interface = NULL;
	OSPF_INTERFACE *sptr_next_interface = NULL;
	ULONG link_state_id;

	for (sptr_area = ospf.sptr_area_list; sptr_area != NULL; sptr_area = sptr_next_area)
		{
		sptr_next_area = sptr_area->sptr_forward_link;
		for (sptr_interface = sptr_area->sptr_interfaces; sptr_interface != NULL; sptr_interface = sptr_next_interface)
			{
			sptr_next_interface = sptr_interface->sptr_forward_link;
			if (sptr_interface->area_id == sptr_area->area_id)
				{
				link_state_id = sptr_advertisement->ls_header.id;
				link_state_id = net_to_host_long (link_state_id);

				if (sptr_interface->address == link_state_id)
					{
					return (PASS);
					}
				}
			}
		}

	return (FAIL);

}