DFS CAC time in milliseconds.
current state for DFS (enum nl80211_dfs_state)
time in miliseconds for how long this channel is in this DFS state.
Channel is disabled in current regulatory domain.
Frequency in MHz
Only indoor use is permitted on this channel. A channel that has the INDOOR_ONLY attribute can only be used when there is a clear assessment that the device is operating in an indoor surroundings, i.e., it is connected to AC power (and not through portable DC inverters) or is under the control of a master that is acting as an AP and is connected to AC power.
IR operation is allowed on this channel if it's connected concurrently to a BSS on the same channel on the 2 GHz band or to a channel in the same UNII band (on the 5 GHz band), and IEEE80211_CHAN_RADAR is not set. Instantiating a GO or TDLS off-channel on a channel that has the IR_CONCURRENT attribute set can be done when there is a clear assessment that the device is operating under the guidance of an authorized master, i.e., setting up a GO or TDLS off-channel while the device is also connected to an AP with DFS and radar detection on the UNII band (it is up to user-space, i.e., wpa_supplicant to perform the required verifications). Using this attribute for IR is disallowed for master interfaces (IBSS, AP).
Maximum transmission power in mBm (100 * dBm).
10 MHz operation is not allowed on this channel in current regulatory domain.
any 160 MHz (but not 80+80) channel using this channel as the primary or any of the secondary channels isn't possible
20 MHz operation is not allowed on this channel in current regulatory domain.
any 80 MHz channel using this channel as the primary or any of the secondary channels isn't possible, this includes 80+80 channels
HT40- isn't possible with this channel as the control channel
HT40+ isn't possible with this channel as the control channel
no mechanisms that initiate radiation are permitted on this channel, this includes sending probe requests, or modes of operation that require beaconing.
Radar detection is mandatory on this channel in current regulatory domain.
this channel has wmm limitations. This is a nested attribute that contains the wmm limitation per AC. (see &enum nl80211_wmm_rule)
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frequency attributes
See https://apps.fcc.gov/eas/comments/GetPublishedDocument.html?id=327&tn=528122 for more information on the FCC description of the relaxations allowed by NL80211_FREQUENCY_ATTR_INDOOR_ONLY and NL80211_FREQUENCY_ATTR_IR_CONCURRENT.