#!/bin/sh
#----------------------------------------------------------------------------
# /etc/rc.d/rc340.circuits.pppoe_in_kernel - configuration of PPPoE
# was file /etc/rc.d/pppoe
#
# Creation:     09.09.2000 fm
# Last Update:  $Id$
#----------------------------------------------------------------------------

case $OPT_PPPOE in
yes)
    begin_script CIRCUITS_PPPOE "starting pppoe ..."

    : ${PPPOE_NF_MSS:=MTU}
    lcp_interval=30                                 # LCP interval
    lcp_failure=5                                   # LCP failure count
    pppoe_timeout=120                               # should be 4 * lcp_interval

    ip link set dev $PPPOE_ETH mtu 1500             # set mtu to 1500
    ip link set dev $PPPOE_ETH up


    debug=''
    usepeerdns=''
    active_filter=''
    idle=

    case "$PPPOE_DEBUG" in
        yes) debug='debug' ;;
    esac

    case ${DIALMODE}${PPPOE_HUP_TIMEOUT} in
    autonever)
        mode=persist
        ;;
    *)
        active_filter=$(ppp_filter_get)
        [ -n "$active_filter" ] && active_filter="active-filter \"$active_filter\""
        mode=demand
        idle="idle $PPPOE_HUP_TIMEOUT"
        ;;
    esac

    case "$PPPOE_USEPEERDNS" in
        yes) usepeerdns='usepeerdns' ;;
    esac

    pppoe_dev=$PPPOE_ETH
    case $pppoe_dev in
        br*|dummy*)
            pppoe_dev="nic-$pppoe_dev"
            ;;
    esac

    echo "\"$PPPOE_USER\"  *  \"$PPPOE_PASS\"  *" >> /etc/ppp/pap-secrets

    do_modprobe pppoe

    if [ "$START_IMOND" = "yes" ]
    then
        defaultroute=''                             # imond handles default route
        echo $DIALMODE >/var/run/pppoe.dialmode
    else
        defaultroute='defaultroute'
        echo auto >/var/run/pppoe.dialmode
    fi

    eval mtu="$PPPOE_MTU"
    eval mru="$PPPOE_MRU"
    : ${mtu:=1492}
    : ${mru:=1492}

    local=10.112.112.112
    remote=10.112.112.113

    localll=::200:0:0:1
    remotell=::200:0:0:2

    dev=pppoe
    echo $local >/var/run/$dev.conf
    echo $remote >>/var/run/$dev.conf

    case "$OPT_IPV6" in
        yes)
            ipv6enable='+ipv6'
            ipv6ifidentifier="ipv6 $localll,$remotell"
            echo $localll >/var/run/$dev.conf.ipv6
            echo $remotell >>/var/run/$dev.conf.ipv6
            ;;
        *)
            ipv6enable='noipv6'
            ipv6ifidentifier=''
            ;;
    esac

    > /var/run/pppoe.HUP

    mkdir -p /etc/ppp/peers
    cat <<EOF > /etc/ppp/peers/circuit.$dev
$usepeerdns
plugin rp-pppoe.so
noipdefault
noauth
$defaultroute
hide-password
nodetach
local
$debug
mtu $mtu
mru $mru
noaccomp
noccp
nobsdcomp
nodeflate
nopcomp
novj
novjccomp
user "$PPPOE_USER"
lcp-echo-interval $lcp_interval
lcp-echo-failure $lcp_failure
holdoff 3
maxfail 0
$local:$remote
$ipv6enable
$ipv6ifidentifier
ipcp-accept-remote
ipcp-accept-local
connect true
ktune
$mode
$idle
$active_filter
EOF

    # device for pppoe is present and ethernet link is active
    attempts=60
    wsleeps="1 5 60"
    # this means that the first 60 attempts are performed once per second
    # the second 60 attempts are performed once per five seconds
    # all following attempts are performed once per minute

    wsleep="$wsleeps"
    widx=0
    (sleep 5; while true
    do
        pppoe_device_is_ready_to_use=0
        if ip a s $pppoe_dev >/dev/null 2>&1
        then
            pppoe_device_is_ready_to_use=1
            if ! ip a s $pppoe_dev | grep -q NO-CARRIER
            then
                pppoe_device_is_ready_to_use=2
                pppd call circuit.$dev $pppoe_dev
                [ -f /etc/ppp/peers/circuit.$dev ] || exit 1
                imond-stat "pppoe: restart"

                wsleep="$wsleeps"
                widx=0
                continue
            fi
        fi
        if [ $pppoe_device_is_ready_to_use -lt 2 ]
        then
            set -- $wsleep
            if [ $widx -eq 0 ]
            then
                case $pppoe_device_is_ready_to_use in
                0)
                    log_error "PPPoE device $pppoe_dev is not available, can't start ppp daemon"
                    ;;
                1)
                    log_error "PPPoE device $pppoe_dev has no link, can't start ppp daemon"
                    ;;
                esac
            fi

            sleep $1
            widx=$((widx + 1))
            if [ $widx -eq $attempts ]
            then
                widx=0
                if [ $# -gt 1 ]
                then
                    shift
                    wsleep="$@"
                fi
            fi
        fi
    done) &

    case $PPPOE_NF_MSS in
        MTU) tcpmss_opt=--clamp-mss-to-pmtu ;;
        *)   tcpmss_opt="--set-mss $PPPOE_NF_MSS" ;;
    esac
    echo "/sbin/iptables -I FORWARD -o \`cat /var/run/pppoe-device\` -p tcp --tcp-flags SYN,RST SYN -j TCPMSS $tcpmss_opt" > /etc/rc.d/fwrules.pre.pppoe

    type=pppoe
    times="$PPPOE_TIMES"
    usepeerdns="$PPPOE_USEPEERDNS"
    name="$PPPOE_NAME"
    chargeint="$PPPOE_CHARGEINT"
    case ${PPPOE_HUP_TIMEOUT} in
        never) hup_timeout='0' ;;
        *) hup_timeout="$PPPOE_HUP_TIMEOUT" ;;
    esac

    . /etc/rc.d/dsl-circuit-common

    if [ -f /usr/local/sbin/pppoe-status ]
    then
        /usr/local/sbin/pppoe-status >/dev/tty3 &
    fi

    end_script
;;
esac