# -*- text -*-
#
#  ippool/mssql/queries.conf -- MSSQL queries for rlm_sqlippool
#
#  $Id$

#
# MSSQL-specific syntax - required if finding the address and updating
# it are separate queries
#
#allocate_begin = "BEGIN TRAN"
#allocate_commit = "COMMIT TRAN"

allocate_begin = ""
allocate_commit = ""

#
#  This series of queries allocates an IP address
#

#
# Attempt to allocate the address a client previously had.  This is based on pool_key
# and nasipaddress.  Change the criteria if the identifier for "stickyness" is different.
# If different criteria are used, check the indexes on the IP pool table to ensure the fields
# are appropriately indexed.  To disable stickyness comment out this query.
#
allocate_existing = "\
	WITH cte AS ( \
		SELECT TOP(1) FramedIPAddress, CallingStationId, UserName, expiry_time \
		FROM ${ippool_table} WITH (xlock rowlock readpast) \
		WHERE pool_name = '%{control:${pool_name}}' \
		AND NASIPAddress = '%{NAS-IP-Address}' AND pool_key = '${pool_key}' \
		ORDER BY expiry_time DESC \
	) \
	UPDATE cte \
	SET \
		CallingStationId = '%{Calling-Station-Id}', \
		UserName = '%{User-Name}', expiry_time = DATEADD(SECOND,${lease_duration},CURRENT_TIMESTAMP) \
	OUTPUT INSERTED.FramedIPAddress"

#
# Find a free IP address from the pool, choosing the oldest expired one.
#
allocate_find = "\
	WITH cte AS ( \
		SELECT TOP(1) FramedIPAddress, NASIPAddress, pool_key, \
			CallingStationId, UserName, expiry_time \
		FROM ${ippool_table} WITH (xlock rowlock readpast) \
		WHERE pool_name = '%{control:${pool_name}}' \
		AND expiry_time < CURRENT_TIMESTAMP \
		ORDER BY expiry_time \
	) \
	UPDATE cte \
	SET \
		NASIPAddress = '%{NAS-IP-Address}', pool_key = '${pool_key}', \
		CallingStationId = '%{Calling-Station-Id}', \
		UserName = '%{User-Name}', expiry_time = DATEADD(SECOND,${lease_duration},CURRENT_TIMESTAMP) \
	OUTPUT INSERTED.FramedIPAddress"

#
#  If you prefer to allocate a random IP address every time, use this query instead.
#  Note: This is very slow if you have a lot of free IPs.
#
#allocate_find = "\
#	WITH cte AS ( \
#		SELECT TOP(1) FramedIPAddress, NASIPAddress, pool_key, \
#			CallingStationId, UserName, expiry_time \
#		FROM ${ippool_table} \
#		WHERE pool_name = '%{control:${pool_name}}' \
#		AND expiry_time < CURRENT_TIMESTAMP \
#		ORDER BY newid() \
#	) \
#	UPDATE cte WITH (rowlock, readpast) \
#	SET \
#		NASIPAddress = '%{NAS-IP-Address}', pool_key = '${pool_key}', \
#		CallingStationId = '%{Calling-Station-Id}', \
#		UserName = '%{User-Name}', expiry_time = DATEADD(SECOND,${lease_duration},CURRENT_TIMESTAMP) \
#	OUTPUT INSERTED.FramedIPAddress"

#
#  If an IP could not be allocated, check to see if the pool exists or not
#  This allows the module to differentiate between a full pool and no pool
#  Note: If you are not running redundant pool modules this query may be
#  commented out to save running this query every time an ip is not allocated.
#
pool_check = "\
	SELECT TOP(1) id \
	FROM ${ippool_table} \
	WHERE pool_name='%{control:${pool_name}}'"

#
#  This is the final IP Allocation query, which saves the allocated ip details.
#  Only needed if allocate_existing / allocate_find do not also update the pool.
#
#allocate_update = "\
#	UPDATE ${ippool_table} \
#	SET \
#		NASIPAddress = '%{NAS-IP-Address}', pool_key = '${pool_key}', \
#		CallingStationId = '%{Calling-Station-Id}', \
#		UserName = '%{User-Name}', expiry_time = DATEADD(SECOND,${lease_duration},CURRENT_TIMESTAMP) \
#	WHERE FramedIPAddress = '%I'"

#
#  Use a stored procedure to find AND allocate the address. Read and customise
#  `procedure.sql` in this directory to determine the optimal configuration.
#
#allocate_begin = ""
#allocate_find = "\
#	EXEC fr_allocate_previous_or_new_framedipaddress \
#		@v_pool_name = '%{control:${pool_name}}', \
#		@v_username = '%{User-Name}', \
#		@v_callingstationid = '%{Calling-Station-Id}', \
#		@v_nasipaddress = '%{NAS-IP-Address}', \
#		@v_pool_key = '${pool_key}', \
#		@v_lease_duration = ${lease_duration} \
#	"
#allocate_update = ""
#allocate_commit = ""

#
#  This series of queries frees an IP number when an accounting START record arrives.
#
start_update = "\
	UPDATE ${ippool_table} \
	SET \
		expiry_time = DATEADD(SECOND,${lease_duration},CURRENT_TIMESTAMP) \
	WHERE NASIPAddress = '%{NAS-IP-Address}' \
	AND pool_key = '${pool_key}' \
	AND UserName = '%{User-Name}' \
	AND CallingStationId = '%{Calling-Station-Id}' \
	AND FramedIPAddress = '%{${attribute_name}}'"

#
#  Expire an IP when an accounting STOP record arrives
#
stop_clear = "\
	UPDATE ${ippool_table} \
	SET \
		expiry_time = CURRENT_TIMESTAMP \
	WHERE NASIPAddress = '%{%{Nas-IP-Address}:-%{Nas-IPv6-Address}}' \
	AND pool_key = '${pool_key}' \
	AND UserName = '%{User-Name}' \
	AND CallingStationId = '%{Calling-Station-Id}' \
	AND FramedIPAddress = '%{${attribute_name}}'"

#
#  Update the expiry time for an IP when an accounting ALIVE record arrives
#
alive_update = "\
	UPDATE ${ippool_table} \
	SET \
		expiry_time = DATEADD(SECOND,${lease_duration},CURRENT_TIMESTAMP) \
	WHERE NASIPAddress = '%{%{Nas-IP-Address}:-%{Nas-IPv6-Address}}' \
	AND pool_key = '${pool_key}' \
	AND UserName = '%{User-Name}' \
	AND CallingStationId = '%{Calling-Station-Id}' \
	AND FramedIPAddress = '%{${attribute_name}}'"

#
#  Expires all IPs allocated to a NAS when an accounting ON record arrives
#
on_clear = "\
	UPDATE ${ippool_table} \
	SET \
		expiry_time = CURRENT_TIMESTAMP \
	WHERE NASIPAddress = '%{%{Nas-IP-Address}:-%{Nas-IPv6-Address}}'"

#
#  Expires all IPs allocated to a NAS when an accounting OFF record arrives
#
off_clear = "\
	UPDATE ${ippool_table} \
	SET \
		expiry_time = CURRENT_TIMESTAMP \
	WHERE NASIPAddress = '%{%{Nas-IP-Address}:-%{Nas-IPv6-Address}}'"