148 lines
4.6 KiB
Text
148 lines
4.6 KiB
Text
# -*- text -*-
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#
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# ippool/sqlite/queries.conf -- SQLite queries for rlm_sqlippool
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#
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# $Id: 46ce58e9bdb574acf24ecb2307ac5bd5583382fb $
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#
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# SQLite does not implement SELECT FOR UPDATE which is normally used to place
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# an exclusive lock over rows to prevent the same address from being
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# concurrently selected for allocation to multiple users.
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#
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# The most granular read-blocking lock that SQLite has is an exclusive lock
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# over the database, so that's what we use. All locking in SQLite is performed
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# over the entire database and we perform a row update for any IP that we
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# allocate, requiring an exclusive lock. Taking the exclusive lock from the
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# start of the transaction (even if it were not required to guard the SELECT)
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# is actually quicker than if we deferred it causing SQLite to "upgrade" the
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# automatic shared lock for the transaction to an exclusive lock for the
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# subsequent UPDATE.
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#
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allocate_begin = "BEGIN EXCLUSIVE"
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allocate_commit = "COMMIT"
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#
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# This series of queries allocates an IP address
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#
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#
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# Attempt to allocate the address a client previously had. This is based on pool_key
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# and nasipaddress. Change the criteria if the identifier for "stickyness" is different.
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# If different criteria are used, check the indexes on the IP pool table to ensure the fields
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# are appropriately indexed. To disable stickyness comment out this query.
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#
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allocate_existing = "\
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SELECT framedipaddress \
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FROM ${ippool_table} \
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WHERE pool_name = '%{control:${pool_name}}' \
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AND nasipaddress = '%{NAS-IP-Address}' AND pool_key = '${pool_key}' \
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ORDER BY expiry_time DESC \
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LIMIT 1"
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#
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# Find a free IP address from the pool, choosing the oldest expired one.
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#
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allocate_find = "\
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SELECT framedipaddress \
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FROM ${ippool_table} \
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WHERE pool_name = '%{control:${pool_name}}' \
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expiry_time < datetime('now') \
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ORDER BY expiry_time \
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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, i
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# 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 \
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# FROM ${ippool_table} \
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# WHERE pool_name = '%{control:${pool_name}}' \
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# AND expiry_time IS NULL \
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# ORDER BY RAND() \
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# LIMIT 1"
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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 ${ippool_table} \
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SET \
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nasipaddress = '%{NAS-IP-Address}', \
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pool_key = '${pool_key}', \
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callingstationid = '%{Calling-Station-Id}', \
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username = '%{User-Name}', \
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expiry_time = datetime(strftime('%%s', 'now') + ${lease_duration}, 'unixepoch') \
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WHERE framedipaddress = '%I'"
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#
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# Extend an IP expiry time when an accounting START record 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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expiry_time = datetime(strftime('%%s', 'now') + ${lease_duration}, 'unixepoch') \
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WHERE nasipaddress = '%{NAS-IP-Address}' \
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AND pool_key = '${pool_key}' \
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AND username = '%{User-Name}' \
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AND callingstationid = '%{Calling-Station-Id}' \
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AND framedipaddress = '%{${attribute_name}}'"
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#
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# Expire an IP when an accounting STOP record arrives
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#
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stop_clear = "\
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UPDATE ${ippool_table} \
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SET \
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expiry_time = datetime('now') \
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WHERE nasipaddress = '%{%{Nas-IP-Address}:-%{Nas-IPv6-Address}}' \
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AND pool_key = '${pool_key}' \
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AND username = '%{User-Name}' \
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AND callingstationid = '%{Calling-Station-Id}' \
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AND framedipaddress = '%{${attribute_name}}'"
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#
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# Update the expiry time for an IP when an accounting ALIVE record arrives
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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 = datetime(strftime('%%s', 'now') + ${lease_duration}, 'unixepoch') \
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WHERE nasipaddress = '%{%{Nas-IP-Address}:-%{Nas-IPv6-Address}}' \
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AND pool_key = '${pool_key}' \
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AND username = '%{User-Name}' \
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AND callingstationid = '%{Calling-Station-Id}' \
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AND framedipaddress = '%{${attribute_name}}'"
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#
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# Expires all IPs allocated to a NAS when an accounting ON record arrives
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#
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on_clear = "\
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UPDATE ${ippool_table} \
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SET \
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expiry_time = datetime('now') \
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WHERE nasipaddress = '%{%{Nas-IP-Address}:-%{Nas-IPv6-Address}}'"
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#
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# Expires all IPs allocated to a NAS when an accounting OFF record arrives
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#
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off_clear = "\
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UPDATE ${ippool_table} \
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SET \
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expiry_time = datetime('now') \
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WHERE nasipaddress = '%{%{Nas-IP-Address}:-%{Nas-IPv6-Address}}'"
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