update session database in Authorization

[Houssam Melhem]

Hello,

When 2 users  with same username try to login to the server at the same
time; Radius server receives Auth and Acct packets in the following order:

1- Auth from user1
2- Auth from user2
3- Acct from user1
4- Acct from user2

Since the session database is not populated until a user sends an accounting
packet (using radutmp or sql modules)
How can we prevent multiple login in this situation? shall we think in
adding a record to the session database in authorization section?


I am using freeradius-2.1.6

configurations
=============
authorize {
        preprocess
        chap
        suffix
        files
        sql
        pap
}
preacct {
        preprocess
        acct_unique
        suffix
        files
}
accounting {
#       radutmp
        sql
}
session {
#       radutmp
        sql
}


Thanks,
Houssam
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