OpenWrt – Rev 3

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#!/bin/sh
# Copyright (C) 2006 OpenWrt.org

. /lib/functions.sh
. /usr/share/libubox/jshn.sh

usage() {
        cat <<EOF
Usage: $0 [config|down|reload|status]
enables (default), disables or configures devices not yet configured.
EOF
        exit 1
}

ubus_wifi_cmd() {
        local cmd="$1"
        local dev="$2"

        json_init
        [ -n "$2" ] && json_add_string device "$2"
        ubus call network.wireless "$1" "$(json_dump)"
}

find_net_config() {(
        local vif="$1"
        local cfg
        local ifname

        config_get cfg "$vif" network

        [ -z "$cfg" ] && {
                include /lib/network
                scan_interfaces

                config_get ifname "$vif" ifname

                cfg="$(find_config "$ifname")"
        }
        [ -z "$cfg" ] && return 0
        echo "$cfg"
)}


bridge_interface() {(
        local cfg="$1"
        [ -z "$cfg" ] && return 0

        include /lib/network
        scan_interfaces

        for cfg in $cfg; do
                config_get iftype "$cfg" type
                [ "$iftype" = bridge ] && config_get "$cfg" ifname
                prepare_interface_bridge "$cfg"
                return $?
        done
)}

prepare_key_wep() {
        local key="$1"
        local hex=1

        echo -n "$key" | grep -qE "[^a-fA-F0-9]" && hex=0
        [ "${#key}" -eq 10 -a $hex -eq 1 ] || \
        [ "${#key}" -eq 26 -a $hex -eq 1 ] || {
                [ "${key:0:2}" = "s:" ] && key="${key#s:}"
                key="$(echo -n "$key" | hexdump -ve '1/1 "%02x" ""')"
        }
        echo "$key"
}

wifi_fixup_hwmode() {
        local device="$1"
        local default="$2"
        local hwmode hwmode_11n

        config_get channel "$device" channel
        config_get hwmode "$device" hwmode
        case "$hwmode" in
                11bg) hwmode=bg;;
                11a) hwmode=a;;
                11b) hwmode=b;;
                11g) hwmode=g;;
                11n*)
                        hwmode_11n="${hwmode##11n}"
                        case "$hwmode_11n" in
                                a|g) ;;
                                default) hwmode_11n="$default"
                        esac
                        config_set "$device" hwmode_11n "$hwmode_11n"
                ;;
                *)
                        hwmode=
                        if [ "${channel:-0}" -gt 0 ]; then
                                if [ "${channel:-0}" -gt 14 ]; then
                                        hwmode=a
                                else
                                        hwmode=g
                                fi
                        else
                                hwmode="$default"
                        fi
                ;;
        esac
        config_set "$device" hwmode "$hwmode"
}

_wifi_updown() {
        for device in ${2:-$DEVICES}; do (
                config_get disabled "$device" disabled
                [ "$disabled" = "1" ] && {
                        echo "'$device' is disabled"
                        set disable
                }
                config_get iftype "$device" type
                if eval "type ${1}_$iftype" 2>/dev/null >/dev/null; then
                        eval "scan_$iftype '$device'"
                        eval "${1}_$iftype '$device'" || echo "$device($iftype): ${1} failed"
                elif [ ! -f /lib/netifd/wireless/$iftype.sh ]; then
                        echo "$device($iftype): Interface type not supported"
                fi
        ); done
}

wifi_updown() {
        cmd=down
        [ enable = "$1" ] && {
                _wifi_updown disable "$2"
                ubus_wifi_cmd "$cmd" "$2"
                scan_wifi
                cmd=up
        }
        ubus_wifi_cmd "$cmd" "$2"
        _wifi_updown "$@"
}

wifi_reload_legacy() {
        _wifi_updown "disable" "$1"
        scan_wifi
        _wifi_updown "enable" "$1"
}

wifi_reload() {
        ubus call network reload
        wifi_reload_legacy
}

wifi_detect_notice() {
        >&2 echo "WARNING: Wifi detect is deprecated. Use wifi config instead"
        >&2 echo "For more information, see commit 5f8f8a366136a07df661e31decce2458357c167a"
        exit 1
}

wifi_config() {
        [ ! -f /etc/config/wireless ] && touch /etc/config/wireless

        for driver in $DRIVERS; do (
                if eval "type detect_$driver" 2>/dev/null >/dev/null; then
                        eval "detect_$driver" || echo "$driver: Detect failed" >&2
                else
                        echo "$driver: Hardware detection not supported" >&2
                fi
        ); done
}

start_net() {(
        local iface="$1"
        local config="$2"
        local vifmac="$3"

        [ -f "/var/run/$iface.pid" ] && kill "$(cat /var/run/${iface}.pid)" 2>/dev/null
        [ -z "$config" ] || {
                include /lib/network
                scan_interfaces
                for config in $config; do
                        setup_interface "$iface" "$config" "" "$vifmac"
                done
        }
)}

set_wifi_up() {
        local cfg="$1"
        local ifname="$2"
        uci_set_state wireless "$cfg" up 1
        uci_set_state wireless "$cfg" ifname "$ifname"
}

set_wifi_down() {
        local cfg="$1"
        local vifs vif vifstr

        [ -f "/var/run/wifi-${cfg}.pid" ] &&
                kill "$(cat "/var/run/wifi-${cfg}.pid")" 2>/dev/null
        uci_revert_state wireless "$cfg"
        config_get vifs "$cfg" vifs
        for vif in $vifs; do
                uci_revert_state wireless "$vif"
        done
}

scan_wifi() {
        local cfgfile="$1"
        DEVICES=
        config_cb() {
                local type="$1"
                local section="$2"

                # section start
                case "$type" in
                        wifi-device)
                                append DEVICES "$section"
                                config_set "$section" vifs ""
                                config_set "$section" ht_capab ""
                        ;;
                esac

                # section end
                config_get TYPE "$CONFIG_SECTION" TYPE
                case "$TYPE" in
                        wifi-iface)
                                config_get device "$CONFIG_SECTION" device
                                config_get vifs "$device" vifs
                                append vifs "$CONFIG_SECTION"
                                config_set "$device" vifs "$vifs"
                        ;;
                esac
        }
        config_load "${cfgfile:-wireless}"
}

DEVICES=
DRIVERS=
include /lib/wifi
scan_wifi

case "$1" in
        down) wifi_updown "disable" "$2";;
        detect) wifi_detect_notice ;;
        config) wifi_config ;;
        status) ubus_wifi_cmd "status" "$2";;
        reload) wifi_reload "$2";;
        reload_legacy) wifi_reload_legacy "$2";;
        --help|help) usage;;
        *) ubus call network reload; wifi_updown "enable" "$2";;
esac