NL80211_ATTR_CH_SWITCH_BLOCK_TX
if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
nla_put_flag(msg, NL80211_ATTR_CH_SWITCH_BLOCK_TX))
[NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },