wiconfig(8)

wiconfig(8) の出力する Channel list の値が 1 ずれている気がするんだけど、他のデバイスだとどうなってるんだろ。
無線LAN 2.4GHz 帯のチャンネルって 1〜14 だよね…。

nonaka@koharu:[5]$ wiconfig urtwn0
NIC serial number:                      [  ]
Station name:                           [ koharu.myhome.local ]
SSID for IBSS creation:                 [  ]
Current netname (SSID):                 [  ]
Desired netname (SSID):                 [  ]
Current BSSID:                          [ 00:00:00:00:00:00 ]
Channel list:                           [ 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ]
IBSS channel:                           [ 1 ]
Current channel:                        [ 1 ]
Comms quality/signal/noise:             [ 0 0 0 ]
Promiscuous mode:                       [ Off ]
Port type:                              [ 1 ]
MAC address:                            [ 00:22:cf:45:09:fd ]
TX rate (selection):                    [ 0 ]
TX rate (actual speed):                 [ 0 ]
Beacon Interval (current) [msec]:       [ 0 ]
Maximum data length:                    [ 2346 ]
RTS/CTS handshake threshold:            [ 2346 ]
fragmentation threshold:                [ 2346 ]
RSSI -> dBm adjustment:                 [ ]
Create IBSS:                            [ Off ]
Microwave oven robustness:              [ 0 ]
Roaming mode(1:firm,3:disable):         [ 1 ]
Access point density:                   [ 1 ]
Power Mgmt (1=on, 0=off):               [ 0 ]
Max sleep time (msec):                  [ 100 ]
Vendor info:
WEP encryption:                         [ Off ]
Authentication type
(1=OpenSys, 2=Shared Key):              [ 1 ]
TX encryption key:                      [ 0 ]
Encryption keys:                        [  ][  ][  ][  ]