/etc/freeradius/3.0/mods-config/sql/ippool/postgresql/queries.conf is in freeradius-config 3.0.12+dfsg-5+deb9u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# ippool/postgresql/queries.conf -- PostgreSQL queries for rlm_sqlippool
#
# $Id: 38465e829f61efab50f565dc349ef64b29052f21 $
#
# This query allocates an IP address from the Pool
# The ORDER BY clause of this query tries to allocate the same IP-address
# to the user that they had last session...
#
allocate_find = "\
SELECT framedipaddress \
FROM ${ippool_table} \
WHERE pool_name = '%{control:Pool-Name}' \
AND expiry_time < 'now'::timestamp(0) \
ORDER BY \
(username <> '%{SQL-User-Name}'), \
(callingstationid <> '%{Calling-Station-Id}'), \
expiry_time \
LIMIT 1 \
FOR UPDATE"
#
# If you prefer to allocate a random IP address every time, use this query instead
#
allocate_find = "\
SELECT framedipaddress FROM ${ippool_table} \
WHERE pool_name = '%{control:Pool-Name}' AND expiry_time < 'now'::timestamp(0) \
ORDER BY RANDOM() \
LIMIT 1 \
FOR UPDATE"
#
# If an IP could not be allocated, check to see whether 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 id \
FROM ${ippool_table} \
WHERE pool_name='%{control:Pool-Name}' \
LIMIT 1"
#
# This query marks the IP address handed out by "allocate-find" as used
# for the period of "lease_duration" after which time it may be reused.
#
allocate_update = "\
UPDATE ${ippool_table} \
SET \
nasipaddress = '%{NAS-IP-Address}', \
pool_key = '${pool_key}', \
callingstationid = '%{Calling-Station-Id}', \
username = '%{SQL-User-Name}', \
expiry_time = 'now'::timestamp(0) + '${lease_duration} second'::interval \
WHERE framedipaddress = '%I'"
#
# This query frees the IP address assigned to "pool_key" when a new request
# comes in for the same "pool_key". This means that either you are losing
# accounting Stop records or you use Calling-Station-Id instead of NAS-Port
# as your "pool_key" and your users are able to reconnect before your NAS
# has timed out their previous session. (Generally on wireless networks)
# (Note: If your pool_key is set to Calling-Station-Id and not NAS-Port
# then you may wish to delete the "AND nasipaddress = '%{Nas-IP-Address}'
# from the WHERE clause)
#
allocate_clear = "\
UPDATE ${ippool_table} \
SET \
nasipaddress = '', \
pool_key = 0, \
callingstationid = '', \
expiry_time = 'now'::timestamp(0) - '1 second'::interval \
WHERE nasipaddress = '%{NAS-IP-Address}' \
AND pool_key = '${pool_key}'"
#
# This query extends an IP address lease by "lease_duration" when an accounting
# START record arrives
#
start_update = "\
UPDATE ${ippool_table} \
SET \
expiry_time = 'now'::timestamp(0) + '${lease_duration} second'::interval \
WHERE nasipaddress = '%{NAS-IP-Address}' \
AND pool_key = '${pool_key}'"
#
# This query frees an IP address when an accounting
# STOP record arrives
#
stop_clear = "\
UPDATE ${ippool_table} \
SET \
nasipaddress = '', \
pool_key = 0, \
callingstationid = '', \
expiry_time = 'now'::timestamp(0) - '1 second'::interval \
WHERE nasipaddress = '%{Nas-IP-Address}' \
AND pool_key = '${pool_key}' \
AND username = '%{SQL-User-Name}' \
AND callingstationid = '%{Calling-Station-Id}' \
AND framedipaddress = '%{Framed-IP-Address}'"
#
# This query extends an IP address lease by "lease_duration" when an accounting
# ALIVE record arrives
#
alive_update = "\
UPDATE ${ippool_table} \
SET \
expiry_time = 'now'::timestamp(0) + '${lease_duration} seconds'::interval \
WHERE nasipaddress = '%{Nas-IP-Address}' \
AND pool_key = '${pool_key}' \
AND framedipaddress = '%{Framed-IP-Address}' \
AND username = '%{SQL-User-Name}' \
AND callingstationid = '%{Calling-Station-Id}'"
#
# This query frees all IP addresses allocated to a NAS when an
# accounting ON record arrives from that NAS
#
on_clear = "\
UPDATE ${ippool_table} \
SET \
nasipaddress = '', \
pool_key = 0, \
callingstationid = '', \
expiry_time = 'now'::timestamp(0) - '1 second'::interval \
WHERE nasipaddress = '%{Nas-IP-Address}'"
#
# This query frees all IP addresses allocated to a NAS when an
# accounting OFF record arrives from that NAS
#
off_clear = "\
UPDATE ${ippool_table} \
SET \
nasipaddress = '', \
pool_key = 0, \
callingstationid = '', \
expiry_time = 'now'::timestamp(0) - '1 second'::interval \
WHERE nasipaddress = '%{Nas-IP-Address}'"
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