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#! /usr/bin/env python3
#
# Example Python module for prepaid usage using MySQL
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
#
# Copyright 2002 Miguel A.L. Paraz <mparaz@mparaz.com>
# Copyright 2002 Imperium Technology, Inc.
#
# $Id$
import radiusd
import MySQLdb
# Configuration
configDb = 'python' # Database name
configHost = 'localhost' # Database host
configUser = 'python' # Database user and password
configPasswd = 'python'
# xxx Database
# Globals
dbHandle = None
def log(level, s):
"""Log function."""
radiusd.radlog(level, 'prepaid.py: ' + s)
def instantiate(p):
"""Module Instantiation. 0 for success, -1 for failure.
p is a dummy variable here."""
global dbHandle
try:
dbHandle = MySQLdb.connect(db=configDb, host=configHost,
user=configUser, passwd=configPasswd)
except MySQLdb.OperationalError as e:
# Report the error and return -1 for failure.
# xxx A more advanced module would retry the database.
log(radiusd.L_ERR, str(e))
return -1
log(radiusd.L_INFO, 'db connection: ' + str(dbHandle))
return 0
def authorize(authData):
"""Authorization and authentication are done in one step."""
# Extract the data we need.
userName = None
userPasswd = None
for t in authData:
if t[0] == 'User-Name':
userName = t[1]
elif t[0] == 'Password':
userPasswd = t[1]
# Build and log the SQL statement
# radiusd puts double quotes (") around the string representation of
# the RADIUS packet.
sql = 'select passwd, maxseconds from users where username = ' + userName
log(radiusd.L_DBG, sql)
# Get a cursor
# xxx Or should this be one cursor all throughout?
try:
dbCursor = dbHandle.cursor()
except MySQLdb.OperationalError as e:
log(radiusd.L_ERR, str(e))
return radiusd.RLM_MODULE_FAIL
# Execute the SQL statement
try:
dbCursor.execute(sql)
except MySQLdb.OperationalError as e:
log(radiusd.L_ERR, str(e))
dbCursor.close()
return radiusd.RLM_MODULE_FAIL
# Get the result. (passwd, maxseconds)
result = dbCursor.fetchone()
if not result:
# User not found
log(radiusd.L_INFO, 'user not found: ' + userName)
dbCursor.close()
return radiusd.RLM_MODULE_NOTFOUND
# Compare passwords
# Ignore the quotes around userPasswd.
if result[0] != userPasswd[1:-1]:
log(radiusd.L_DBG, 'user password mismatch: ' + userName)
return radiusd.RLM_MODULE_REJECT
maxSeconds = result[1]
# Compute their session limit
# Build and log the SQL statement
sql = 'select sum(seconds) from sessions where username = ' + userName
log(radiusd.L_DBG, sql)
# Execute the SQL statement
try:
dbCursor.execute(sql)
except MySQLdb.OperationalError as e:
log(radiusd.L_ERR, str(e))
dbCursor.close()
return radiusd.RLM_MODULE_FAIL
# Get the result. (sum,)
result = dbCursor.fetchone()
if (not result) or (not result[0]):
# No usage yet
secondsUsed = 0
else:
secondsUsed = result[0]
# Done with cursor
dbCursor.close()
# Note that MySQL returns the result of SUM() as a float.
sessionTimeout = maxSeconds - int(secondsUsed)
if sessionTimeout <= 0:
# No more time, reject outright
log(radiusd.L_INFO, 'user out of time: ' + userName)
return radiusd.RLM_MODULE_REJECT
# Log the success
log(radiusd.L_DBG, 'user accepted: %s, %d seconds' %
(userName, sessionTimeout))
# We are adding to the RADIUS packet
# Note that the session timeout integer must be converted to string.
# We need to set an Auth-Type.
return (radiusd.RLM_MODULE_UPDATED,
(('Session-Timeout', str(sessionTimeout)),),
(('Auth-Type', 'python'),))
# If you want to use different operators
# you can do
# return (radiusd.RLM_MODULE_UPDATED,
# (
# ('Session-Timeout', ':=', str(sessionTimeout)),
# ('Some-other-option', '-=', Value'),
# ),
# (
# ('Auth-Type', ':=', 'python'),
# ),
# )
def authenticate(p):
return radiusd.RLM_MODULE_OK
def preacct(p):
return radiusd.RLM_MODULE_OK
def accounting(acctData):
"""Accounting."""
# Extract the data we need.
userName = None
acctSessionTime = None
acctStatusType = None
# xxx A dict would make this nice.
for t in acctData:
if t[0] == 'User-Name':
userName = t[1]
elif t[0] == 'Acct-Session-Time':
acctSessionTime = t[1]
elif t[0] == 'Acct-Status-Type':
acctStatusType = t[1]
# We will not deal with Start for now.
# We may later, for simultaneous checks and the like.
if acctStatusType == 'Start':
return radiusd.RLM_MODULE_OK
# Build and log the SQL statement
# radiusd puts double quotes (") around the string representation of
# the RADIUS packet.
#
# xxx This is simplistic as it does not record the time, etc.
#
sql = 'insert into sessions (username, seconds) values (%s, %d)' % \
(userName, int(acctSessionTime))
log(radiusd.L_DBG, sql)
# Get a cursor
# xxx Or should this be one cursor all throughout?
try:
dbCursor = dbHandle.cursor()
except MySQLdb.OperationalError as e:
log(radiusd.L_ERR, str(e))
return radiusd.RLM_MODULE_FAIL
# Execute the SQL statement
try:
dbCursor.execute(sql)
except MySQLdb.OperationalError as e:
log(radiusd.L_ERR, str(e))
dbCursor.close()
return radiusd.RLM_MODULE_FAIL
return radiusd.RLM_MODULE_OK
def detach():
"""Detach and clean up."""
# Shut down the database connection.
global dbHandle
log(radiusd.L_DBG, 'closing database handle: ' + str(dbHandle))
dbHandle.close()
return radiusd.RLM_MODULE_OK
# Test the modules
if __name__ == '__main__':
instantiate(None)
print(authorize((('User-Name', '"map"'), ('User-Password', '"abc"'))))
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