I've been following the guide at http://wiki.freeradius.org/guide/Mac-Auth I completed the section called Mac-Auth and 802.1x  The issue im having is with the rewrite_calling_station_id.

If I comment this out and make sure the authorized_macs file has the mac listed just like the access point sends it everything works.  The problem is not all access points send the mac in the same format.  Some may send it in upper case and some in lower case and with 30 plus access points I need to make sure its formatted correctly Which is what rewrite_calling_station_id should do.

In the log below authorized_macs has the mac address in lower case.  rewrite_calling_station_id should should solve this but does not.   In order to get it working I commented out rewrite_calling_station_id and changed the mac in the authorized_macs file to upper case.

I'm using ubuntu 10.4, FreeRADIUS Version 2.1.8
I noticed this WARNING: Unknown module "tolower" in string expansion "%" in the rejected log.
I have searched for a tolower program but can not find one to install.

What package is tolower part of ?
What am I missing?

Here is the policy.conf file

# Rewrite called station id attribute into a standard format.
#
rewrite_calling_station_id {
        if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i){
                update request {
                        Calling-Station-Id := "%{tolower:%{1}-%{2}-%{3}-%{4}-%{5}-%{6}}"
                }
        }
        else {
                noop
        }
}

Here is the rejected log

FreeRADIUS Version 2.1.8, for host i486-pc-linux-gnu, built on Jan  5 2010 at 02:49:11
Copyright (C) 1999-2009 The FreeRADIUS server project and contributors.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
You may redistribute copies of FreeRADIUS under the terms of the
GNU General Public License v2.
Starting - reading configuration files ...
including configuration file /etc/freeradius/radiusd.conf
including configuration file /etc/freeradius/proxy.conf
including configuration file /etc/freeradius/clients.conf
including files in directory /etc/freeradius/modules/
including configuration file /etc/freeradius/modules/cui
including configuration file /etc/freeradius/modules/sqlcounter_expire_on_login
including configuration file /etc/freeradius/modules/etc_group
including configuration file /etc/freeradius/modules/detail.example.com
including configuration file /etc/freeradius/modules/otp
including configuration file /etc/freeradius/modules/logintime
including configuration file /etc/freeradius/modules/radutmp
including configuration file /etc/freeradius/modules/inner-eap
including configuration file /etc/freeradius/modules/chap
including configuration file /etc/freeradius/modules/ldap
including configuration file /etc/freeradius/modules/detail
including configuration file /etc/freeradius/modules/attr_rewrite
including configuration file /etc/freeradius/modules/mac2vlan
including configuration file /etc/freeradius/modules/sql_log
including configuration file /etc/freeradius/modules/expr
including configuration file /etc/freeradius/modules/checkval
including configuration file /etc/freeradius/modules/passwd
including configuration file /etc/freeradius/modules/exec
including configuration file /etc/freeradius/modules/smsotp
including configuration file /etc/freeradius/modules/krb5
including configuration file /etc/freeradius/modules/wimax
including configuration file /etc/freeradius/modules/perl
including configuration file /etc/freeradius/modules/realm
including configuration file /etc/freeradius/modules/attr_filter
including configuration file /etc/freeradius/modules/smbpasswd
including configuration file /etc/freeradius/modules/policy
including configuration file /etc/freeradius/modules/ntlm_auth
including configuration file /etc/freeradius/modules/files
including configuration file /etc/freeradius/modules/counter
including configuration file /etc/freeradius/modules/echo
including configuration file /etc/freeradius/modules/acct_unique
including configuration file /etc/freeradius/modules/unix
including configuration file /etc/freeradius/modules/ippool
including configuration file /etc/freeradius/modules/mac2ip
including configuration file /etc/freeradius/modules/digest
including configuration file /etc/freeradius/modules/expiration
including configuration file /etc/freeradius/modules/always
including configuration file /etc/freeradius/modules/mschap
including configuration file /etc/freeradius/modules/detail.log
including configuration file /etc/freeradius/modules/sradutmp
including configuration file /etc/freeradius/modules/linelog
including configuration file /etc/freeradius/modules/pam
including configuration file /etc/freeradius/modules/pap
including configuration file /etc/freeradius/modules/preprocess
including configuration file /etc/freeradius/eap.conf
including configuration file /etc/freeradius/policy.conf
including files in directory /etc/freeradius/sites-enabled/
including configuration file /etc/freeradius/sites-enabled/inner-tunnel
including configuration file /etc/freeradius/sites-enabled/default
main {
    user = "freerad"
    group = "freerad"
    allow_core_dumps = no
}
including dictionary file /etc/freeradius/dictionary
main {
    prefix = "/usr"
    localstatedir = "/var"
    logdir = "/var/log/freeradius"
    libdir = "/usr/lib/freeradius"
    radacctdir = "/var/log/freeradius/radacct"
    hostname_lookups = no
    max_request_time = 30
    cleanup_delay = 5
    max_requests = 1024
    pidfile = "/var/run/freeradius/freeradius.pid"
    checkrad = "/usr/sbin/checkrad"
    debug_level = 0
    proxy_requests = yes
 log {
    stripped_names = no
    auth = no
    auth_badpass = no
    auth_goodpass = no
 }
 security {
    max_attributes = 200
    reject_delay = 1
    status_server = yes
 }
}
radiusd: #### Loading Realms and Home Servers ####
 proxy server {
    retry_delay = 5
    retry_count = 3
    default_fallback = no
    dead_time = 120
    wake_all_if_all_dead = no
 }
 home_server localhost {
    ipaddr = 127.0.0.1
    port = 1812
    type = "auth"
    secret = "testing123"
    response_window = 20
    max_outstanding = 65536
    require_message_authenticator = no
    zombie_period = 40
    status_check = "status-server"
    ping_interval = 30
    check_interval = 30
    num_answers_to_alive = 3
    num_pings_to_alive = 3
    revive_interval = 120
    status_check_timeout = 4
    irt = 2
    mrt = 16
    mrc = 5
    mrd = 30
 }
 home_server_pool my_auth_failover {
    type = fail-over
    home_server = localhost
 }
 realm example.com {
    auth_pool = my_auth_failover
 }
 realm LOCAL {
 }
radiusd: #### Loading Clients ####
 client localhost {
    ipaddr = 127.0.0.1
    require_message_authenticator = no
    secret = "testing123"
    nastype = "other"
 }
 client 10.1.0.66 {
    require_message_authenticator = no
    secret = "testing123"
    shortname = "AP"
 }
radiusd: #### Instantiating modules ####
 instantiate {
 Module: Linked to module rlm_exec
 Module: Instantiating exec
  exec {
    wait = no
    input_pairs = "request"
    shell_escape = yes
  }
 Module: Linked to module rlm_expr
 Module: Instantiating expr
 Module: Linked to module rlm_expiration
 Module: Instantiating expiration
  expiration {
    reply-message = "Password Has Expired  "
  }
 Module: Linked to module rlm_logintime
 Module: Instantiating logintime
  logintime {
    reply-message = "You are calling outside your allowed timespan  "
    minimum-timeout = 60
  }
 }
radiusd: #### Loading Virtual Servers ####
server inner-tunnel {
 modules {
 Module: Checking authenticate {...} for more modules to load
 Module: Linked to module rlm_pap
 Module: Instantiating pap
  pap {
    encryption_scheme = "auto"
    auto_header = no
  }
 Module: Linked to module rlm_chap
 Module: Instantiating chap
 Module: Linked to module rlm_mschap
 Module: Instantiating mschap
  mschap {
    use_mppe = yes
    require_encryption = no
    require_strong = no
    with_ntdomain_hack = no
  }
 Module: Linked to module rlm_unix
 Module: Instantiating unix
  unix {
    radwtmp = "/var/log/freeradius/radwtmp"
  }
 Module: Linked to module rlm_eap
 Module: Instantiating eap
  eap {
    default_eap_type = "peap"
    timer_expire = 60
    ignore_unknown_eap_types = no
    cisco_accounting_username_bug = no
    max_sessions = 4096
  }
 Module: Linked to sub-module rlm_eap_md5
 Module: Instantiating eap-md5
 Module: Linked to sub-module rlm_eap_leap
 Module: Instantiating eap-leap
 Module: Linked to sub-module rlm_eap_gtc
 Module: Instantiating eap-gtc
   gtc {
    challenge = "Password: "
    auth_type = "PAP"
   }
 Module: Linked to sub-module rlm_eap_tls
 Module: Instantiating eap-tls
   tls {
    rsa_key_exchange = no
    dh_key_exchange = yes
    rsa_key_length = 512
    dh_key_length = 512
    verify_depth = 0
    pem_file_type = yes
    private_key_file = "/etc/freeradius/certs/server.key"
    certificate_file = "/etc/freeradius/certs/server.pem"
    CA_file = "/etc/freeradius/certs/ca.pem"
    private_key_password = "whatever"
    dh_file = "/etc/freeradius/certs/dh"
    random_file = "/etc/freeradius/certs/random"
    fragment_size = 1024
    include_length = yes
    check_crl = no
    cipher_list = "DEFAULT"
    make_cert_command = "/etc/freeradius/certs/bootstrap"
    cache {
    enable = no
    lifetime = 24
    max_entries = 255
    }
   }
 Module: Linked to sub-module rlm_eap_ttls
 Module: Instantiating eap-ttls
   ttls {
    default_eap_type = "md5"
    copy_request_to_tunnel = no
    use_tunneled_reply = no
    virtual_server = "inner-tunnel"
    include_length = yes
   }
 Module: Linked to sub-module rlm_eap_peap
 Module: Instantiating eap-peap
   peap {
    default_eap_type = "mschapv2"
    copy_request_to_tunnel = no
    use_tunneled_reply = no
    proxy_tunneled_request_as_eap = yes
    virtual_server = "inner-tunnel"
   }
 Module: Linked to sub-module rlm_eap_mschapv2
 Module: Instantiating eap-mschapv2
   mschapv2 {
    with_ntdomain_hack = no
   }
 Module: Checking authorize {...} for more modules to load
 Module: Linked to module rlm_realm
 Module: Instantiating suffix
  realm suffix {
    format = "suffix"
    delimiter = "@"
    ignore_default = no
    ignore_null = no
  }
 Module: Linked to module rlm_files
 Module: Instantiating files
  files {
    usersfile = "/etc/freeradius/users"
    acctusersfile = "/etc/freeradius/acct_users"
    preproxy_usersfile = "/etc/freeradius/preproxy_users"
    compat = "no"
  }
 Module: Checking session {...} for more modules to load
 Module: Linked to module rlm_radutmp
 Module: Instantiating radutmp
  radutmp {
    filename = "/var/log/freeradius/radutmp"
    username = "%{User-Name}"
    case_sensitive = yes
    check_with_nas = yes
    perm = 384
    callerid = yes
  }
 Module: Checking post-proxy {...} for more modules to load
 Module: Checking post-auth {...} for more modules to load
 Module: Linked to module rlm_attr_filter
 Module: Instantiating attr_filter.access_reject
  attr_filter attr_filter.access_reject {
    attrsfile = "/etc/freeradius/attrs.access_reject"
    key = "%{User-Name}"
  }
 } # modules
} # server
server {
 modules {
 Module: Checking authenticate {...} for more modules to load
 Module: Checking authorize {...} for more modules to load
 Module: Linked to module rlm_preprocess
 Module: Instantiating preprocess
  preprocess {
    huntgroups = "/etc/freeradius/huntgroups"
    hints = "/etc/freeradius/hints"
    with_ascend_hack = no
    ascend_channels_per_line = 23
    with_ntdomain_hack = no
    with_specialix_jetstream_hack = no
    with_cisco_vsa_hack = no
    with_alvarion_vsa_hack = no
  }
 Module: Loading virtual module rewrite_calling_station_id
 Module: Linked to module rlm_always
 Module: Instantiating noop
  always noop {
    rcode = "noop"
    simulcount = 0
    mpp = no
  }
 Module: Instantiating authorized_macs
  files authorized_macs {
    usersfile = "/etc/freeradius/authorized_macs"
    compat = "no"
    key = "%{Calling-Station-ID}"
  }
 Module: Instantiating reject
  always reject {
    rcode = "reject"
    simulcount = 0
    mpp = no
  }
 Module: Checking preacct {...} for more modules to load
 Module: Linked to module rlm_acct_unique
 Module: Instantiating acct_unique
  acct_unique {
    key = "User-Name, Acct-Session-Id, NAS-IP-Address, Client-IP-Address, NAS-Port"
  }
 Module: Checking accounting {...} for more modules to load
 Module: Linked to module rlm_detail
 Module: Instantiating detail
  detail {
    detailfile = "/var/log/freeradius/radacct/%{Client-IP-Address}/detail-%Y%m%d"
    header = "%t"
    detailperm = 384
    dirperm = 493
    locking = no
    log_packet_header = no
  }
 Module: Instantiating attr_filter.accounting_response
  attr_filter attr_filter.accounting_response {
    attrsfile = "/etc/freeradius/attrs.accounting_response"
    key = "%{User-Name}"
  }
 Module: Checking session {...} for more modules to load
 Module: Checking post-proxy {...} for more modules to load
 Module: Checking post-auth {...} for more modules to load
 } # modules
} # server
radiusd: #### Opening IP addresses and Ports ####
listen {
    type = "auth"
    ipaddr = *
    port = 0
}
listen {
    type = "acct"
    ipaddr = *
    port = 0
}
Listening on authentication address * port 1812
Listening on accounting address * port 1813
Listening on proxy address * port 1814
Ready to process requests.
rad_recv: Access-Request packet from host 10.1.0.66 port 1520, id=0, length=198
    Message-Authenticator = 0x8e5270705f13e5bf4d6bf9b89ee8b33b
    Service-Type = Framed-User
    User-Name = "aaron"
    Framed-MTU = 1488
    Called-Station-Id = "40-01-C6-DD-CB-40:test-2.4GHz"
    Calling-Station-Id = "00-14-A4-1E-FF-B6"
    NAS-Identifier = "Access-Point-22"
    NAS-Port-Type = Wireless-802.11
    Connect-Info = "CONNECT 54Mbps 802.11g"
    EAP-Message = 0x0200000a016161726f6e
    NAS-IP-Address = 10.1.0.66
    NAS-Port = 1
    NAS-Port-Id = "STA port # 1"
+- entering group authorize {...}
++[preprocess] returns ok
++- entering policy rewrite_calling_station_id {...}
+++? if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i)
? Evaluating (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) -> TRUE
+++? if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) -> TRUE
+++- entering if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) {...}
WARNING: Unknown module "tolower" in string expansion "%"
++++[request] returns ok
+++- if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) returns ok
+++ ... skipping else for request 0: Preceding "if" was taken
++- policy rewrite_calling_station_id returns ok
[authorized_macs]     expand: %{Calling-Station-ID} ->
++[authorized_macs] returns noop
++? if (!ok)
? Evaluating !(ok) -> TRUE
++? if (!ok) -> TRUE
++- entering if (!ok) {...}
+++[reject] returns reject
++- if (!ok) returns reject
Using Post-Auth-Type Reject
+- entering group REJECT {...}
[attr_filter.access_reject]     expand: %{User-Name} -> aaron
 attr_filter: Matched entry DEFAULT at line 11
++[attr_filter.access_reject] returns updated
Delaying reject of request 0 for 1 seconds
Going to the next request
Waking up in 0.9 seconds.
Sending delayed reject for request 0
Sending Access-Reject of id 0 to 10.1.0.66 port 1520
Waking up in 4.9 seconds.
rad_recv: Access-Request packet from host 10.1.0.66 port 1522, id=0, length=198
    Message-Authenticator = 0x770f506840dc4d2173ef986496b52844
    Service-Type = Framed-User
    User-Name = "aaron"
    Framed-MTU = 1488
    Called-Station-Id = "40-01-C6-DD-CB-40:test-2.4GHz"
    Calling-Station-Id = "00-14-A4-1E-FF-B6"
    NAS-Identifier = "Access-Point-22"
    NAS-Port-Type = Wireless-802.11
    Connect-Info = "CONNECT 54Mbps 802.11g"
    EAP-Message = 0x0200000a016161726f6e
    NAS-IP-Address = 10.1.0.66
    NAS-Port = 1
    NAS-Port-Id = "STA port # 1"
+- entering group authorize {...}
++[preprocess] returns ok
++- entering policy rewrite_calling_station_id {...}
+++? if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i)
? Evaluating (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) -> TRUE
+++? if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) -> TRUE
+++- entering if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) {...}
WARNING: Unknown module "tolower" in string expansion "%"
++++[request] returns ok
+++- if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) returns ok
+++ ... skipping else for request 1: Preceding "if" was taken
++- policy rewrite_calling_station_id returns ok
[authorized_macs]     expand: %{Calling-Station-ID} ->
++[authorized_macs] returns noop
++? if (!ok)
? Evaluating !(ok) -> TRUE
++? if (!ok) -> TRUE
++- entering if (!ok) {...}
+++[reject] returns reject
++- if (!ok) returns reject
Using Post-Auth-Type Reject
+- entering group REJECT {...}
[attr_filter.access_reject]     expand: %{User-Name} -> aaron
 attr_filter: Matched entry DEFAULT at line 11
++[attr_filter.access_reject] returns updated
Delaying reject of request 1 for 1 seconds
Going to the next request
Waking up in 0.9 seconds.
Sending delayed reject for request 1
Sending Access-Reject of id 0 to 10.1.0.66 port 1522
Waking up in 3.5 seconds.
Cleaning up request 0 ID 0 with timestamp +16
Waking up in 1.4 seconds.
Cleaning up request 1 ID 0 with timestamp +17
Ready to process requests.