#! /bin/bash
# Source file for the 'ethernet' connection
#   ethernet_up $profile
#   ethernet_down $profile
#   ethernet_status

. /usr/lib/network/network

report_iproute()
{
    report_fail "$*"
    bring_interface down "$INTERFACE"
    exit 1
}

ethernet_up() {
    local dad_timeout="${DAD_TIMEOUT:-3}"

    load_profile "$1"
    SYSCTL_INTERFACE="${INTERFACE/.//}"

    if [[ ! -e "/sys/class/net/$INTERFACE" ]]; then
        if ! echo "$INTERFACE" | fgrep -q ":"; then
            report_iproute "Interface $INTERFACE does not exist"
        fi
    fi

    # Disable IPv6 before bringing the interface up to prevent SLAAC
    if [[ "$IP6" == "no" ]]; then
        sysctl -q -w "net.ipv6.conf.$SYSCTL_INTERFACE.disable_ipv6=1"
    fi

    report_debug ethernet_up ifup
    bring_interface up "$INTERFACE"


    if ! checkyesno "${SKIPNOCARRIER:-no}" && ip link show dev "$INTERFACE" | fgrep -q "NO-CARRIER"; then
        # Some cards are plain slow to come up. Don't fail immediately.
        sleep ${CARRIER_TIMEOUT:-2}
        if ip link show dev "$INTERFACE" | fgrep -q "NO-CARRIER"; then
            report_iproute "No connection"
        fi
    fi

    if checkyesno "${AUTH8021X:-no}"; then
        . "$SUBR_DIR/8021x"
        [[ -z "$WPA_CONF" ]] && WPA_CONF="/etc/wpa_supplicant.conf"
        [[ -z "$WPA_DRIVER" ]] && WPA_DRIVER="wired"
        # Set wpa_supplicant control path (FS#25473)
        WPA_CTRL_PATH=/run/wpa_supplicant
        if grep "^ *ctrl_interface=" "$WPA_CONF" &>/dev/null; then
            WPA_CTRL_PATH=$(grep -m 1 "^ *ctrl_interface=" "$WPA_CONF" | tail -n 1 | cut -d= -f 2- | sed -r 's/DIR=(.*) +GROUP=.*/\1/')
        fi

        report_debug ethernet_up start_wpa "$INTERFACE" "$WPA_CONF" "$WPA_DRIVER" "$WPA_OPTS"
        if ! start_wpa "$INTERFACE" "$WPA_CONF" "$WPA_DRIVER" "$WPA_OPTS"; then
            report_fail "wpa_supplicant did not start, possible configuration error"
            return 1
        fi

        if ! wpa_check "$INTERFACE" "$TIMEOUT" "ASSOCIATED"; then
            bring_interface down "$INTERFACE"
            report_fail "WPA Authentication/Association Failed"
            return 1
        fi
    fi

    if [[ -z "$IP" && -z "$IP6" ]]; then
        report_iproute "At least one of IP or IP6 should be specified"
        return 1
    fi

    case "$IP" in
    dhcp)
        if checkyesno "${DHCLIENT:-no}"; then
            rm -r "/run/dhclient-${INTERFACE}.pid" >/dev/null 2>&1
            report_debug ethernet_up dhclient -q -e TIMEOUT="${DHCP_TIMEOUT:-10}" -pf "/run/dhclient-$INTERFACE.pid" "$INTERFACE"
            if ! dhclient -q -e TIMEOUT="${DHCP_TIMEOUT:-10}" -pf "/run/dhclient-${INTERFACE}.pid" ${DHCLIENT_OPTIONS} "$INTERFACE"; then
                report_fail "DHCP IP lease attempt failed."
                stop_80211x
                return 1
            fi
        else
            # Clear remaining pid files.
            rm -f "/run/dhcpcd-$INTERFACE".{pid,cache} >/dev/null 2>&1
            # If using own dns, tell dhcpcd to NOT replace resolv.conf
            [[ -n "$DNS" ]] && DHCP_OPTIONS="-C resolv.conf $DHCP_OPTIONS"
            # Start dhcpcd
            report_debug ethernet_up dhcpcd -qL -t "${DHCP_TIMEOUT:-10}" $DHCPCD_INTERNAL_OPTIONS $DHCP_OPTIONS "$INTERFACE"
            dhcpcd -qL -t "${DHCP_TIMEOUT:-10}" $DHCPCD_INTERNAL_OPTIONS $DHCP_OPTIONS "$INTERFACE" 2>&1 | report_debug "$(cat)"
            if [[ "$PIPESTATUS" -ne 0 ]]; then
                report_fail "DHCP IP lease attempt failed."
                stop_80211x
                return 1
            fi
        fi
        ;;
    static)
        if [[ -n "$ADDR" ]]; then
            [[ -z $NETMASK ]] && NETMASK=24
            report_debug ethernet_up ip addr add "$ADDR/$NETMASK" brd + dev "$INTERFACE"
            if ! ip addr add "$ADDR/$NETMASK" brd + dev "$INTERFACE"; then
                report_iproute "Could not configure interface"
            fi
        fi
        if [[ -n "$GATEWAY" ]]; then
            report_debug ethernet_up ip route add default via "$GATEWAY" dev "$INTERFACE"
            if ! ip route add default via "$GATEWAY" dev "$INTERFACE"; then
                report_iproute "Adding gateway $GATEWAY failed"
            fi
        fi
        ;;
    ""|no)
        ;;
    *)
        report_iproute "IP must be either 'dhcp', 'static' or 'no'"
        ;;
    esac

    if [[ -n "$IP" && -n "$ROUTES" ]]; then
        for route in "${ROUTES[@]}"; do
            report_debug ethernet_up ip route add $route dev "$INTERFACE"
            if ! ip route add $route dev "$INTERFACE"; then
                report_iproute "Adding route '$route' failed"
            fi
        done
    fi

    # Load ipv6 module if necessary (FS#25530)
    case "$IP6" in
    dhcp*|stateless|static)
        [[ -d "/proc/sys/net/ipv6" ]] || modprobe ipv6
        ;;
    no)
        [[ -d "/proc/sys/net/ipv6" ]] && sysctl -q -w "net.ipv6.conf.$SYSCTL_INTERFACE.accept_ra=0"
        ;;
    "")  # undefined IP6 does not prevent RA's from being received -> nop
        ;;
    *)
        report_iproute "IP6 must be 'dhcp', 'dhcp-noaddr', 'stateless', 'static' or 'no'"
        ;;
    esac

    case "$IP6" in
    dhcp*)
        if [[ ! -x /usr/sbin/dhclient ]]; then
            report_fail "You need to install dhclient to use DHCPv6."
            stop_80211x
            return 1
        fi
        sysctl -q -w "net.ipv6.conf.$SYSCTL_INTERFACE.accept_ra=1"
        if [[ "$IP6" = "dhcp-noaddr" ]]; then
            DHCLIENT6_OPTIONS="-S ${DHCLIENT6_OPTIONS}"
        fi
        _DHCLIENT_PIDFILE="/run/dhclient6-${INTERFACE}.pid"
        rm -r ${_DHCLIENT_PIDFILE} &>/dev/null
        report_debug ethernet_up dhclient -6 -q -e TIMEOUT="${DHCP_TIMEOUT:-10}" -pf ${_DHCLIENT_PIDFILE} "$INTERFACE"
        if ! dhclient -6 -q -e TIMEOUT="${DHCP_TIMEOUT:-10}" -pf ${_DHCLIENT_PIDFILE} ${DHCLIENT6_OPTIONS} "$INTERFACE"; then
            report_fail "DHCPv6 IP lease attempt failed."
            stop_80211x
            return 1
        fi
        ;;
    stateless)
        sysctl -q -w "net.ipv6.conf.$SYSCTL_INTERFACE.accept_ra=1"
        ;;
    static)
        sysctl -q -w "net.ipv6.conf.$SYSCTL_INTERFACE.accept_ra=0"
        if [[ -n "$ADDR6" ]]; then
            for addr in "${ADDR6[@]}"; do
                report_debug ethernet_up ip -6 addr add $addr dev "$INTERFACE"
                if ! ip -6 addr add $addr dev "$INTERFACE"; then
                    report_iproute "Could not add address '$addr' to interface"
                fi
            done
        fi
        if [[ -n "$GATEWAY6" ]]; then
            report_debug ethernet_up ip -6 route replace default via "$GATEWAY6" dev "$INTERFACE"
            if ! ip -6 route replace default via "$GATEWAY6" dev "$INTERFACE"; then
                report_iproute "Adding gateway $GATEWAY6 failed"
            fi
        fi
        ;;
    esac

    if [[ -n "$IP6" ]]; then
        report_debug ethernet_up ip -6 addr show tentative dev "$INTERFACE"
        while [[ -n "$(ip -6 addr show tentative dev "$INTERFACE")" ]]; do
            if (( dad_timeout-- <= 0 )); then
                report_iproute "Duplicate Address Detection is taking too long"
            fi
            sleep 1
        done

        # Add static IPv6 routes
        if [[ -n "$ROUTES6" ]]; then
            for route in "${ROUTES6[@]}"; do
            report_debug ethernet_up ip -6 route add $route dev "$INTERFACE"
                if ! ip -6 route add $route dev "$INTERFACE"; then
                    report_iproute "Adding route '$route' failed"
                fi
            done
        fi
    fi

    if [[ -n "$IPCFG" ]]; then
        for line in "${IPCFG[@]}"; do
            report_debug ethernet_up ip "$line"
            if ! ip $line; then
                report_iproute "Could not configure interface ($line)."
            fi
        done
    fi

    # Set hostname
    if [[ -n "$HOSTNAME" ]]; then
        report_debug ethernet_up hostname "$HOSTNAME"
        if ! echo "$HOSTNAME" > /proc/sys/kernel/hostname; then
            report_iproute "Cannot set hostname to $HOSTNAME"
        fi
    fi

    # Generate a new resolv.conf
    if [[ -n "$DNS" ]]; then
        : >/etc/resolv.conf
        [[ -n "$DOMAIN" ]] && echo "domain $DOMAIN"   >>/etc/resolv.conf
        [[ -n "$SEARCH" ]] && echo "search $SEARCH"   >>/etc/resolv.conf
        for dns in "${DNS[@]}"; do
            echo "nameserver $dns" >>/etc/resolv.conf
        done
    fi

    return 0
}

ethernet_down() {
    load_profile "$1"

    if [[ "$IP" == "dhcp" ]]; then
        if checkyesno "${DHCLIENT:-no}"; then
            if [[ -f "/run/dhclient-$INTERFACE.pid" ]]; then
                report_debug ethernet_down dhclient -q -x "$INTERFACE"
                dhclient -q -x "$INTERFACE" &>/dev/null
                #dhclient -q -r "$INTERFACE" &>/dev/null
            fi
        else
            if [[ -f "/run/dhcpcd-$INTERFACE.pid" ]]; then
                report_debug ethernet_down dhcpcd -qk "$INTERFACE"
                dhcpcd -qk "$INTERFACE" &>/dev/null
            fi
        fi
    fi
    if [[ "$IP6" == dhcp* ]]; then
        if [[ -f "/run/dhclient6-$INTERFACE.pid" ]]; then
            report_debug ethernet_down dhclient -6 -q -x "$INTERFACE"
            dhclient -6 -q -x "$INTERFACE" &>/dev/null
            report_debug ethernet_down /bin/kill $(< /run/dhclient6-$INTERFACE.pid)
            /bin/kill $(< /run/dhclient6-$INTERFACE.pid) &>/dev/null
        fi
    fi

    stop_80211x

    report_debug ethernet_down if_down
    if [[ "$CONNECTION" == "wireless" ]]; then
        bring_interface flush "$INTERFACE"
    else
        bring_interface down "$INTERFACE"
    fi
    return 0
}

# Returns status of profile - is it still functional?
ethernet_status() {
    if ! ip link show dev "$INTERFACE" | fgrep -q "state UP"; then
        return 1
    fi
}

# Stop wpa_supplicant if neccessary
stop_80211x() {
    if checkyesno "${AUTH8021X:-no}"; then
        . "$SUBR_DIR/8021x"
        report_debug ethernet_down stop_wpa "$INTERFACE"
        stop_wpa "$INTERFACE"
    fi
}

ethernet_$1 "$2"
exit $?
# vim: set ts=4 et sw=4: