221 lines
6.1 KiB
Text
221 lines
6.1 KiB
Text
# -*- text -*-
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#
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# ippool-dhcp/mysql/queries.conf -- MySQL queries for rlm_sqlippool
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#
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# $Id: 6aaecb1b2075f32ca9eacd32872f6c771885030a $
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# *****************
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# * DHCP DISCOVER *
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# *****************
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#
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# This series of queries allocates an IP address
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# If using MySQL < 8.0.1 then remove SKIP LOCKED
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#
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# Attempt to find the most recent existing IP address for the client
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#
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allocate_existing = "\
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SELECT framedipaddress FROM ${ippool_table} \
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WHERE pool_name = '%{control:${pool_name}}' \
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AND pool_key = '${pool_key}' \
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AND `status` IN ('dynamic', 'static') \
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ORDER BY expiry_time DESC LIMIT 1 FOR UPDATE SKIP LOCKED"
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#
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# Determine whether the requested IP address is available
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#
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allocate_requested = "\
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SELECT framedipaddress FROM ${ippool_table} \
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WHERE pool_name = '%{control:${pool_name}}' \
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AND framedipaddress = '%{%{${req_attribute_name}}:-0.0.0.0}' \
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AND `status` = 'dynamic' \
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AND expiry_time < NOW() \
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FOR UPDATE SKIP LOCKED"
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#
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# If the existing address can't be found this query will be run to
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# find a free address
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#
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allocate_find = "\
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SELECT framedipaddress FROM ${ippool_table} \
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WHERE pool_name = '%{control:${pool_name}}' \
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AND expiry_time < NOW() \
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AND `status` = 'dynamic' \
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ORDER BY expiry_time LIMIT 1 FOR UPDATE SKIP LOCKED"
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#
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# The ORDER BY clause of this query tries to allocate the same IP-address
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# which the user last had. Ensure that pool_key is unique to the user
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# within a given pool.
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#
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#
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# Alternatively do the operations in one query. Depending on transaction
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# isolation mode, this can cause deadlocks
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#
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#allocate_find = "\
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# (SELECT framedipaddress, 1 AS o FROM ${ippool_table} \
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# WHERE pool_name = '%{control:${pool_name}}' \
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# AND pool_key = '${pool_key}' \
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# AND `status` IN ('dynamic', 'static') \
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# ORDER BY expiry_time DESC LIMIT 1 FOR UPDATE SKIP LOCKED \
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# ) UNION ( \
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# SELECT framedipaddress, 2 AS o FROM ${ippool_table} \
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# WHERE pool_name = '%{control:${pool_name}}' \
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# AND framedipaddress = '%{%{${req_attribute_name}}:-0.0.0.0}' \
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# AND `status` = 'dynamic' \
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# AND ( pool_key = '${pool_key}' OR expiry_time < NOW() ) \
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# FOR UPDATE SKIP LOCKED \
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# ) UNION ( \
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# SELECT framedipaddress, 3 AS o FROM ${ippool_table} \
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# WHERE pool_name = '%{control:${pool_name}}' \
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# AND expiry_time < NOW() \
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# AND `status` = 'dynamic' \
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# ORDER BY expiry_time LIMIT 1 FOR UPDATE SKIP LOCKED \
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# ) ORDER BY o \
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# LIMIT 1"
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#
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# If you prefer to allocate a random IP address every time, use this query instead.
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# Note: This is very slow if you have a lot of free IPs.
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#
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#allocate_find = "\
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# SELECT framedipaddress FROM ${ippool_table} \
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# WHERE pool_name = '%{control:${pool_name}}' \
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# AND expiry_time < NOW() \
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# AND `status` = 'dynamic' \
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# ORDER BY \
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# RAND() \
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# LIMIT 1 \
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# FOR UPDATE"
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#
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# The above query again, but with SKIP LOCKED. This requires MySQL >= 8.0.1,
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# and InnoDB.
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#
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#allocate_find = "\
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# SELECT framedipaddress FROM ${ippool_table} \
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# WHERE pool_name = '%{control:${pool_name}}' \
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# AND expiry_time < NOW() \
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# AND `status` = 'dynamic' \
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# ORDER BY \
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# RAND() \
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# LIMIT 1 \
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# FOR UPDATE SKIP LOCKED"
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#
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# If an IP could not be allocated, check to see if the pool exists or not
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# This allows the module to differentiate between a full pool and no pool
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# Note: If you are not running redundant pool modules this query may be
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# commented out to save running this query every time an ip is not allocated.
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#
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pool_check = "\
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SELECT id \
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FROM ${ippool_table} \
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WHERE pool_name='%{control:${pool_name}}' \
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LIMIT 1"
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#
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# This is the final IP Allocation query, which saves the allocated ip details.
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#
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allocate_update = "\
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UPDATE ${ippool_table} \
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SET \
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gateway = '%{DHCP-Gateway-IP-Address}', pool_key = '${pool_key}', \
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expiry_time = NOW() + INTERVAL ${offer_duration} SECOND \
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WHERE framedipaddress = '%I'"
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#
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# Use a stored procedure to find AND allocate the address. Read and customise
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# `procedure.sql` in this directory to determine the optimal configuration.
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#
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#allocate_begin = ""
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#allocate_find = "\
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# CALL fr_dhcp_allocate_previous_or_new_framedipaddress( \
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# '%{control:${pool_name}}', \
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# '%{DHCP-Gateway-IP-Address}', \
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# '${pool_key}', \
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# ${offer_duration}, \
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# '%{%{${req_attribute_name}}:-0.0.0.0}' \
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# )"
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#allocate_update = ""
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#allocate_commit = ""
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# ****************
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# * DHCP REQUEST *
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# ****************
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#
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# This query revokes any active offers for addresses that a client is not
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# requesting when a DHCP REQUEST packet arrives
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#
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start_update = "\
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UPDATE ${ippool_table} \
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SET \
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gateway = '', \
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pool_key = '', \
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expiry_time = NOW() \
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WHERE pool_name = '%{control:${pool_name}}' \
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AND pool_key = '${pool_key}' \
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AND framedipaddress <> '%{DHCP-Requested-IP-Address}' \
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AND expiry_time > NOW() \
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AND `status` = 'dynamic'"
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#
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# This query extends an existing lease (or offer) when a DHCP REQUEST packet
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# arrives. This query must update a row when a lease is succesfully requested
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# - queries that update no rows will result in a "notfound" response to
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# the module which by default will give a DHCP-NAK reply. In this example
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# incrementing "counter" is used to achieve this.
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#
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alive_update = "\
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UPDATE ${ippool_table} \
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SET \
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expiry_time = NOW() + INTERVAL ${lease_duration} SECOND, \
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counter = counter + 1 \
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WHERE pool_name = '%{control:${pool_name}}' \
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AND pool_key = '${pool_key}' \
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AND framedipaddress = '%{%{DHCP-Requested-IP-Address}:-%{DHCP-Client-IP-Address}}'"
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# ****************
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# * DHCP RELEASE *
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# ****************
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#
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# This query frees an IP address when a DHCP RELEASE packet arrives
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#
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stop_clear = "\
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UPDATE ${ippool_table} \
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SET \
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gateway = '', \
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pool_key = '', \
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expiry_time = NOW() \
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WHERE pool_name = '%{control:${pool_name}}' \
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AND pool_key = '${pool_key}' \
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AND framedipaddress = '%{DHCP-Client-IP-Address}' \
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AND `status` = 'dynamic'"
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#
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# This query is not applicable to DHCP
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#
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on_clear = ""
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# ****************
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# * DHCP DECLINE *
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# ****************
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#
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# This query marks an IP address as declined when a DHCP Decline
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# packet arrives
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#
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off_clear = "\
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UPDATE ${ippool_table} \
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SET status = 'declined' \
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WHERE pool_name = '%{control:${pool_name}}' \
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AND pool_key = '${pool_key}' \
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AND framedipaddress = '%{DHCP-Requested-IP-Address}'"
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