## /usr/lib/network/globals needs to be sourced before this file


## Determine the system interface of an rfkill device
# $1: interface name
# $2: rfkill name
get_rf_path() {
    local interface=$1 rfkill_name=${2:-auto} path

    if [[ $rfkill_name == "auto" ]]; then
        path=$(find -L "/sys/class/net/$interface/" -maxdepth 2 -type d -name "rfkill*" 2> /dev/null | head -n 1)
        if [[ $path ]]; then
            echo "$path"
            return 0
        fi
        report_error "No rfkill switch available on interface '$interface'"
    else
        for path in /sys/class/rfkill/*; do
            if [[ $(< "$path/name") == "$rfkill_name" ]]; then
                echo "$path"
                return 0
            fi
        done
        report_error "No rfkill switch with name '$rfkill_name'"
    fi
    return 1
}

## Unblock transmission through a wireless device
# $1: interface name
# $2: rfkill name
enable_rf() {
    local interface=$1 rfkill=$2 path hard soft

    path=$(get_rf_path "$interface" "$rfkill") || return 1
    read hard < "$path/hard"
    read soft < "$path/soft"

    if (( hard )); then
        report_error "Transmission is hard-blocked on interface '$interface'"
        return 1
    elif (( soft )); then
        report_debug "$FUNCNAME: echo 0 > '$path/soft'"
        echo 0 > "$path/soft"
        timeout_wait 1 '(( ! $(< "$path/soft") ))'
    fi
}

## Block transmission through a wireless device
# $1: interface name
# $2: rfkill name
disable_rf() {
    local interface=$1 rfkill=$2 path

    path=$(get_rf_path "$interface" "$rfkill") || return 1
    report_debug "$FUNCNAME: echo 1 > '$path/soft'"
    echo 1 > "$path/soft"
    timeout_wait 1 '(( $(< "$path/soft") ))'
}


# vim: ft=sh ts=4 et sw=4: