/* include digest in packet's IP length field (not OSPF packet's length field) */			*ulptr_length = ((ULONG) *ulptr_length) + OSPF_AUTHENTICATION_MD5_SIZE;            mdString (                (BYTE *) sptr_packet, (ULONG) *ulptr_length, bptr_digest, MD5);			/* append digest to the end of the OSPF packet (i.e. the digest is written over the OSPF key) */			memcpy ((void *) bptr_end_of_packet, (const void *) bptr_digest, (size_t) OSPF_AUTHENTICATION_MD5_SIZE);			break;			}		default:			{			sptr_packet->authentication_type = OSPF_AUTHENTICATION_NONE;			sptr_packet->authentication_type = net_to_host_short (sptr_packet->authentication_type);			memset ( (void *) &(sptr_packet->authentication_field.key_or_plain_text_passwd), 0x00, OSPF_AUTHENTICATION_SIMPLE_SIZE);			sptr_packet->checksum = 0x0000;			sptr_packet->checksum = calculate_ip_checksum (NULL, (BYTE *) sptr_packet, (USHORT) *ulptr_length /* in host order */);			break;			}		}	return OK;}/**************************************************************************************************************************************/static OSPF_AUTHENTICATION_KEY *ospf_get_best_key_to_use_for_md5_authentication (OSPF_INTERFACE *sptr_interface){	ULONG current_time;	OSPF_AUTHENTICATION_KEY *sptr_authentication_key_to_use;	OSPF_AUTHENTICATION_KEY *sptr_authentication_key;	OSPF_PRINTF_DEBUG (OSPF_DEBUG_PRINTF, "OSPF: Entering ospf_get_best_key_to_use_for_md5_authentication\r\n");	/* SPR 84312 -- Begin */	current_time = ospf_get_system_elapsed_time_second ();	/* SPR 84312 -- End */	sptr_authentication_key_to_use = NULL;	for (sptr_authentication_key = sptr_interface->sptr_authentication_key; sptr_authentication_key != NULL;		sptr_authentication_key = sptr_authentication_key->sptr_forward_link)		{		if ((sptr_authentication_key->key_start_generate <= current_time) &&			((sptr_authentication_key->key_stop_generate > current_time) ||			(sptr_authentication_key->key_stop_generate == 0x00000000L)))			{			if (sptr_authentication_key_to_use != NULL)				{				if (sptr_authentication_key_to_use->key_start_generate < sptr_authentication_key->key_start_generate)					{					sptr_authentication_key_to_use = sptr_authentication_key;					}				}			else				{				sptr_authentication_key_to_use = sptr_authentication_key;				}			}		}	if (sptr_authentication_key_to_use == NULL)		{		return (0x0000);		}	else		{		return (sptr_authentication_key_to_use);		}}/**************************************************************************************************************************************/static void ospf_send_packet_to_all_neighbors_in_up_state (OSPF_HEADER *sptr_packet,ULONG length /* in host order */,	OSPF_INTERFACE *sptr_interface,enum BOOLEAN free_packet){	OSPF_NEIGHBOR *sptr_neighbor = NULL;	OSPF_NEIGHBOR *sptr_next_neighbor = NULL;	OSPF_PRINTF_DEBUG (OSPF_DEBUG_PRINTF, "OSPF: Entering ospf_send_packet_to_all_neighbors_in_up_state\r\n");	for (sptr_neighbor = sptr_interface->sptr_neighbor; sptr_neighbor != NULL; sptr_neighbor = sptr_next_neighbor)		{		sptr_next_neighbor = sptr_neighbor->sptr_forward_link;		if (sptr_neighbor->state != OSPF_NEIGHBOR_DOWN)			{			ospf_send_packet (sptr_packet, length /* in host order */, sptr_neighbor->address, sptr_interface, free_packet);			}		}	return;}/**************************************************************************************************************************************/static void ospf_send_packet_to_all_eligible_neighbors (OSPF_HEADER *sptr_packet,ULONG length /* in host order */,	OSPF_INTERFACE *sptr_interface,enum BOOLEAN free_packet){	OSPF_NEIGHBOR *sptr_neighbor = NULL;	OSPF_NEIGHBOR *sptr_next_neighbor = NULL;	OSPF_PRINTF_DEBUG (OSPF_DEBUG_PRINTF, "OSPF: Entering ospf_send_packet_to_all_eligible_neighbors\r\n");	for (sptr_neighbor = sptr_interface->sptr_neighbor; sptr_neighbor != NULL; sptr_neighbor = sptr_next_neighbor)		{		sptr_next_neighbor = sptr_neighbor->sptr_forward_link;		if (sptr_neighbor->priority != 0x0000)			{			ospf_send_packet (sptr_packet, length /* in host order */, sptr_neighbor->address, sptr_interface, free_packet);			}		}	return;}/**************************************************************************************************************************************/static void ospf_send_packet_to_all_neighbors_in_exchange_state (OSPF_HEADER *sptr_packet,ULONG length /* in host order */,	OSPF_INTERFACE *sptr_interface,enum BOOLEAN free_packet){	OSPF_NEIGHBOR *sptr_neighbor = NULL;	OSPF_NEIGHBOR *sptr_next_neighbor = NULL;	OSPF_PRINTF_DEBUG (OSPF_DEBUG_PRINTF, "OSPF: Entering ospf_send_packet_to_all_neighbors_in_exchange_state\r\n");	for (sptr_neighbor = sptr_interface->sptr_neighbor; sptr_neighbor != NULL; sptr_neighbor = sptr_next_neighbor)		{		sptr_next_neighbor = sptr_neighbor->sptr_forward_link;		if (sptr_neighbor->state >= OSPF_NEIGHBOR_EXCHANGE)			{			ospf_send_packet (sptr_packet, length /* in host order */, sptr_neighbor->address, sptr_interface, free_packet);			}		}	return;}/**************************************************************************************************************************************/static void ospf_send_packet_to_designated_router_and_backup_designated_router (OSPF_HEADER *sptr_packet,ULONG length /* in host order */,	OSPF_INTERFACE *sptr_interface,enum BOOLEAN free_packet){	OSPF_PRINTF_DEBUG (OSPF_DEBUG_PRINTF, "OSPF: Entering ospf_send_packet_to_designated_router_and_backup_designated_router\r\n");	if (sptr_interface->designated_router.address != 0x00000000L)		{		ospf_send_packet (sptr_packet, length /* in host order */, sptr_interface->designated_router.address, sptr_interface, free_packet);		}	if (sptr_interface->backup_designated_router.address != 0x00000000L)		{		ospf_send_packet (sptr_packet, length /* in host order */, sptr_interface->backup_designated_router.address, sptr_interface, free_packet);		}	return;}/*raw socket - Removed building ip header for OSPF packet and *added sptr_packet and length to ospf_vx_ip_output.  These two *variables were needed for sockets jkw*//**************************************************************************************************************************************/static void ospf_send_packet (OSPF_HEADER *sptr_packet,ULONG length /* in host order */,ULONG destination_address,	OSPF_INTERFACE *sptr_interface,enum BOOLEAN free_packet){	bool flag_multicast;	OSPF_PRINTF_DEBUG (OSPF_DEBUG_PRINTF, "OSPF: Entering ospf_send_packet\r\n");	if ((destination_address == OSPF_ADDR_ALLSPF) ||(destination_address == OSPF_ADDR_ALLDR))		{		flag_multicast = true;		}	else		{ 		flag_multicast = false;		}	if (ospf_validate_interface(sptr_interface->address) != TRUE)    {        if (free_packet == TRUE)            ospf_free_an_ospf_send_packet (sptr_packet);        return;    }	if (sptr_interface->type != OSPF_VIRTUAL_LINK);	else		{		/*		 * Packet is going out on Virtual Link. Destination can never be Multicast address		 */		flag_multicast = false;/* bhanu - fix for correcting the destination address from RID to IpAddress */		destination_address = ospf_virtual_link_convert_rid_to_interface_addresss( destination_address, sptr_interface->sptr_transit_area);/* end of fix - bhanu */		}	ospf_display_ospf_header (sptr_packet, FALSE);	ospf_vx_ip_output (sptr_packet, sptr_interface->address/*source address*/, flag_multicast, destination_address, length, free_packet);	return;}/******************************************************************************/static ULONG ospf_virtual_link_convert_rid_to_interface_addresss    ( ULONG destination_address, OSPF_AREA_ENTRY *sptr_transit_area )    {    ULONG virtual_address = 0x00000000;	OSPF_LS_DATABASE_ENTRY *sptr_database_entry = NULL;    if (sptr_transit_area == NULL)        {        return destination_address;        }    /* SPR#76812 -- Begin */	sptr_database_entry = ospf_find_LSA(sptr_transit_area, destination_address, 0x00000000, OSPF_LS_ROUTER);    if (sptr_database_entry == NULL)    {        return destination_address;    }    else    {		if(sptr_database_entry->advertisement.sptr_router != NULL)		{			virtual_address = sptr_database_entry->advertisement.sptr_router->link.link_data;			return net_to_host_long (virtual_address);		}	}	return destination_address;	/* SPR#76812 -- End */    }