#!/bin/sh

[ -n "$INCLUDE_ONLY" ] || {
    NOT_INCLUDED=1
    INCLUDE_ONLY=1

    . ../netifd-proto.sh
    . ./ppp.sh
    init_proto "$@"
}

proto_3g_init_config() {
    no_device=1
    available=1
    ppp_generic_init_config
    proto_config_add_string "device:device"
    proto_config_add_string "apn"
    proto_config_add_string "service"
    proto_config_add_string "pincode"
    proto_config_add_string "dialnumber"
}

proto_3g_setup() {
    local interface="$1"
    local chat

    json_get_var device device
    json_get_var apn apn
    json_get_var service service
    json_get_var pincode pincode
    json_get_var dialnumber dialnumber

    [ -n "$dat_device" ] && device=$dat_device

    device="$(readlink -f $device)"
    [ -e "$device" ] || {
        proto_set_available "$interface" 0
        return 1
    }

    case "$service" in
        cdma|evdo)
            chat="/etc/chatscripts/evdo.chat"
        ;;
        *)
            chat="/etc/chatscripts/3g.chat"
            cardinfo=$(gcom -d "$device" -s /etc/gcom/getcardinfo.gcom)
            if echo "$cardinfo" | grep -q Novatel; then
                case "$service" in
                    umts_only) CODE=2;;
                    gprs_only) CODE=1;;
                    *) CODE=0;;
                esac
                export MODE="AT\$NWRAT=${CODE},2"
            elif echo "$cardinfo" | grep -q Option; then
                case "$service" in
                    umts_only) CODE=1;;
                    gprs_only) CODE=0;;
                    *) CODE=3;;
                esac
                export MODE="AT_OPSYS=${CODE}"
            elif echo "$cardinfo" | grep -q "Sierra Wireless"; then
                SIERRA=1
                case "$service" in
                    umts_only) CODE="01";;
                    gprs_only) CODE="02";;
                    umts_pref) CODE="03";;
                    gprs_pref) CODE="04";;
                    *) CODE="00";;
                esac
                export MODE="AT!SELRAT=${CODE}"
            elif echo "$cardinfo" | grep -qi huawei; then
                case "$service" in
                    umts_only) CODE="14,2";;
                    gprs_only) CODE="13,1";;
                    umts_pref) CODE="2,2";;
                    gprs_pref) CODE="2,1";;
                    *) CODE="2,2";;
                esac
                export MODE="AT^SYSCFG=${CODE},3FFFFFFF,2,4"
            elif echo "$cardinfo" | grep -q ZTE; then
                case "$service" in
                    umts_only) CODE="2,0,0";;
                    gprs_only) CODE="1,0,0";;
                    umts_pref) CODE="0,0,2";;
                    gprs_pref) CODE="0,0,1";;
                    *) CODE="0,0,0";;
                esac
                export MODE="AT+ZSNT=${CODE}"
            fi

            if [ -n "$pincode" ]; then
                PINCODE="$pincode" gcom -d "$device" -s /etc/gcom/setpin.gcom || {
                    proto_notify_error "$interface" PIN_FAILED
                    proto_block_restart "$interface"
                    return 1
                }
            fi
            [ "$service" = "umts" ] && MODE=""
            [ -n "$MODE" ] && gcom -d "$device" -s /etc/gcom/setmode.gcom

            # wait for carrier to avoid firmware stability bugs
            [ -n "$SIERRA" ] && {
                gcom -d "$device" -s /etc/gcom/getcarrier.gcom || return 1
            }

            if [ -z "$dialnumber" ]; then
                dialnumber="*99***1#"
            fi

        ;;
    esac

    gcom -d "$device" -s /etc/gcom/getstrength.gcom > /tmp/strength.txt

    connect="${apn:+USE_APN=$apn }DIALNUMBER=$dialnumber /usr/sbin/chat -t5 -v -E -f $chat"
    ppp_generic_setup "$interface" \
        noaccomp \
        nopcomp \
        novj \
        nobsdcomp \
        noauth \
        set EXTENDPREFIX=1 \
        lock \
        crtscts \
        115200 "$device"
    return 0
}

proto_3g_teardown() {
    proto_kill_command "$interface"
}

[ -z "$NOT_INCLUDED" ] || add_protocol 3g