#! /bin/bash
#
# ifup-ippp
# 
# This script is normally called from the ifup script when it detects an ippp device.

. /etc/init.d/functions

cd /etc/sysconfig/network-scripts
. ./network-functions

# Get global network configuration
[ -f /etc/sysconfig/network ] && . /etc/sysconfig/network

GATEWAY=""

# set device
CONFIG=$1
[ -f "${CONFIG}" ] || CONFIG=ifcfg-${1}
source_config

if [ "${2}" = "boot" -a "${ONBOOT}" = "no" ]; then
    exit
fi

if [ ! -f /var/lock/subsys/isdn ] && [ -x /etc/init.d/isdn ] ; then
    /etc/init.d/isdn start
fi

# check that ipppd is available for syncppp 
if [ "$ENCAP" = "syncppp" ]; then
    if [ ! -x /sbin/ipppd ] && [ ! -x /usr/sbin/ipppd ] ; then
        /usr/bin/logger -p daemon.info -t ifup-ippp "ipppd does not exist or is not executable"
        exit 1
    fi
fi

# check that isdnctrl is available
if [ ! -x /sbin/isdnctrl ] && [ ! -x /usr/sbin/isdnctrl ] ; then
    /usr/bin/logger -p daemon.info -t ifup-ippp "isdnctrl does not exist or is not executable"
    exit 1
fi

# check all ISDN devices
if ! isdnctrl list all >/dev/null 2>&1 ; then
    /usr/bin/logger -p daemon.info -t ifup-ippp "cannot list ISDN devices"
    exit 1
fi

# check if device already is configured
isdnctrl list $DEVICE >/dev/null 2>&1 && exit 0

function log_echo()
{
    /usr/bin/logger -p daemon.info -t ifup-ippp $"$*"
}

function log_isdnctrl()
{
    /usr/bin/logger -p daemon.info -t ifup-ippp isdnctrl $*
    isdnctrl $* >/dev/null 2>&1 || exit 1
}

function create_option_file()
{
    umask 066
    echo "$1" > /etc/ppp/ioption-secret-$DEVICE
    umask 022
}

function start_ibod()
{
    # don't start ibod, if it's running
    [ -f /var/lock/subsys/ibod ] && return

    device=$1
    if [ -f /etc/isdn/ibod.cf ] && [ -x /usr/sbin/ibod ] ; then
        ibod $device &
        pid=$(pidof ibod)
        [ -n "$pid" ] && touch /var/lock/subsys/ibod
    fi
}

function addprovider()
{
    options=
    if [ -z "$PHONE_OUT" ]; then
        log_echo "Error: $1: no outgoing phone number set"
        return 1
    fi

    # set the encapsulation mode
    [ -z "$ENCAP" ] && ENCAP="syncppp"

    # set the dial mode
    [ -z "$DIALMODE" ] && DIALMODE="off"

    [ "$AUTH" = "none" -o "$AUTH" = "noauth" -o -z "$AUTH" ] && AUTH="-pap -chap"

    # set layer-2/3 protocol 
    [ -z "$L2_PROT" ] && L2_PROT="hdlc"
    [ -z "$L3_PROT" ] && L3_PROT="trans"

    # check local/remote IP
    [ -z "$IPADDR" ] && IPADDR="0.0.0.0"
    [ -z "$GATEWAY" ] && GATEWAY="0.0.0.0"

    # set default route
    is_true "$DEFROUTE" && options="$options defaultroute deldefaultroute"

    # set authentication
    _auth=$(echo "$AUTH" | sed 's/[a-z -]*//g')
    if [ -n "$_auth" ]; then
        if [ -z "$USER" ] && ! is_true "$DIALIN"; then
            log_echo " Error: $1 (syncppp) user is not set"
            return 1
        fi
        if ! is_true "$DIALIN"; then
            # we should hide the user name, so i add user name to option file.
            if [ "$AUTH" = "-pap +chap" ]; then
                create_option_file "name \"$USER\""
            else
                create_option_file "user \"$USER\""
            fi
            options="$options file /etc/ppp/ioption-secret-$DEVICE"
        fi

        # authentication options:
        # +pap and/or +chap does not work correct by dialout - remove
        # them if it's configured as dialout
        is_true "$DIALIN" || AUTH=$(echo "$AUTH" | sed 's/+[a-z]*//g')
    fi

    # add ISDN device 
    log_isdnctrl addif $DEVICE

    # set local MSN
    [ -z "$MSN" ]  || log_isdnctrl eaz $DEVICE $MSN

    # set dialout numbers
    if echo $COUNTRYCODE | grep ":" >/dev/null 2>&1 ; then
        COUNTRYCODE="$(echo $COUNTRYCODE | cut -f 2 -d ':')"
        [ "$COUNTRYCODE" = "0" ] && COUNTRYCODE=
    else
        COUNTRYCODE=
    fi
    for i in $PHONE_OUT; do
        log_isdnctrl addphone $DEVICE out $COUNTRYCODE$PREFIX$AREACODE$i
    done
    for i in $PHONE_IN; do
        log_isdnctrl addphone $DEVICE in $i
    done

    # set layer-2/3 protocol
    log_isdnctrl l2_prot $DEVICE $L2_PROT
    log_isdnctrl l3_prot $DEVICE $L3_PROT

    # set encapsulation
    log_isdnctrl encap $DEVICE $ENCAP

    # set dialmode
    log_isdnctrl dialmode $DEVICE $DIALMODE

    [ -n "$SECURE" ] && log_isdnctrl secure $DEVICE $SECURE
    [ -n "$HUPTIMEOUT" ] && log_isdnctrl huptimeout $DEVICE $HUPTIMEOUT
    [ -n "$CHARGEHUP" ] && log_isdnctrl chargehup $DEVICE $CHARGEHUP
    [ -n "$CHARGEINT" ] && log_isdnctrl chargeint $DEVICE $CHARGEINT

    [ -n "$IHUP" ] && log_isdnctrl ihup $DEVICE $IHUP

    # set the number of dial atempts for each number
    [ -n "$DIALMAX" ] && log_isdnctrl dialmax $DEVICE $DIALMAX

    # set callback
    if [ "$CALLBACK" = "out" -o "$CALLBACK" = "in" ] ; then
        log_isdnctrl callback $DEVICE $CALLBACK
    else
        log_isdnctrl callback $DEVICE off
    fi
    [ -n "$CBDELAY" ] && log_isdnctrl cbdelay $DEVICE $CBDELAY
    [ -n "$CBHUP" ] && log_isdnctrl cbhup $DEVICE $CBHUP

    options="$options ipparam $DEVNAME"

    [ "$ENCAP" = "syncppp" ] && log_isdnctrl pppbind $DEVICE

    if [ "$IPADDR" = "0.0.0.0" ]; then
        options="$options ipcp-accept-local"
    else
        if ! is_true "$DIALIN"; then
            options="$options noipdefault"
        fi
    fi
    # Add device
    options="$options /dev/$DEVICE"

    # set channel bundling
    if is_true "$BUNDLING" && [ -n "$SLAVE_DEVICE" ]; then
        [ -z "$SLAVE_MSN" ] && SLAVE_MSN="$MSN"
        [ -z "$SLAVE_PHONE_OUT" ] && SLAVE_PHONE_OUT="$PHONE_OUT"
        [ -z "$SLAVE_PHONE_IN" ] && SLAVE_PHONE_IN="$PHONE_IN"
        [ -z "$SLAVE_HUPTIMEOUT" ] && SLAVE_HUPTIMEOUT="$HUPTIMEOUT"
        [ -z "$SLAVE_CHARGEHUP" ] && SLAVE_CHARGEHUP="$CHARGEHUP"
        [ -z "$SLAVE_CHARGEINT" ] && SLAVE_CHARGEINT="$CHARGEINT"
        [ -z "$SLAVE_CBHUP" ] && SLAVE_CBHUP="$CBHUP"
        [ -z "$SLAVE_IHUP" ] && SLAVE_IHUP="$IHUP"
        [ -z "$SLAVE_DIALMAX" ] && SLAVE_DIALMAX="$DIALMAX"
        [ -z "$SLAVE_CALLBACK" ] && SLAVE_CALLBACK="$CALLBACK"
        [ -z "$SLAVE_CBDELAY" ] && SLAVE_CBDELAY="$CBDELAY"
        if ! is_true "$DIALIN"; then
            [ -z "$SLAVE_DIALMODE" ] && SLAVE_DIALMODE="auto"
        else
            # Master should not dial by default on incoming MPPP
            [ -z "$SLAVE_DIALMODE" ] && SLAVE_DIALMODE="$DIALMODE"
        fi

        slave=$SLAVE_DEVICE
        options="$options /dev/$slave +mp"

        # Create slave and set options
        log_isdnctrl addslave $DEVICE $slave
        [ -z $SLAVE_MSN ] || log_isdnctrl eaz $slave $SLAVE_MSN

        # set phone number
        for i in $SLAVE_PHONE_OUT; do
            log_isdnctrl addphone $slave out $COUNTRYCODE$PREFIX$AREACODE$i
        done
        for i in $SLAVE_PHONE_IN; do
            log_isdnctrl addphone $slave in $i
        done

        # set layer-2/3 protocol
        log_isdnctrl l2_prot $slave $L2_PROT
        log_isdnctrl l3_prot $slave $L3_PROT

        # set encapsulation
        log_isdnctrl encap $slave $ENCAP

        # set dial mode
        log_isdnctrl dialmode $slave $SLAVE_DIALMODE

        [ -n "$SECURE" ] && log_isdnctrl secure $slave $SECURE
        [ -n "$SLAVE_HUPTIMEOUT" ] && log_isdnctrl huptimeout $slave $SLAVE_HUPTIMEOUT
        [ -n "$SLAVE_CHARGEHUP" ] && log_isdnctrl chargehup $slave $SLAVE_CHARGEHUP
        [ -n "$SLAVE_CHARGEINT" ] && log_isdnctrl chargeint $slave $SLAVE_CHARGEINT
        [ -n "$SLAVE_IHUP" ] && log_isdnctrl ihup $slave $SLAVE_IHUP
        [ -n "$SLAVE_DIALMAX" ] && log_isdnctrl dialmax $slave $SLAVE_DIALMAX

        # set callback
        [ -n "$SLAVE_CBHUP" ] && log_isdnctrl cbhup $slave $SLAVE_CBHUP
        [ -n "$SLAVE_CALLBACK" ] || SLAVE_CALLBACK="off"
        log_isdnctrl callback $slave $SLAVE_CALLBACK
        [ -n "$SLAVE_CBDELAY" ] && log_isdnctrl cbdelay $DEVICE $SLAVE_CBDELAY

        # options for master device
        [ -n "$SLAVE_DELAY" ] && log_isdnctrl sdelay $DEVICE $SLAVE_DELAY
        [ -n "$SLAVE_TRIGGER" ] && log_isdnctrl trigger $DEVICE $SLAVE_TRIGGER
    fi

    if [ "$GATEWAY" = "0.0.0.0" ]; then
        if ! is_true "$DIALIN"; then
            options="$options ipcp-accept-remote"
        fi
        options="$IPADDR:$GATEWAY $options"
    else
        options="$options $IPADDR:$GATEWAY"
    fi

    # Van Jacobson style TCP/IP header compression and
    # VJ connection-ID compression
    is_false "$VJ" && options="$options -vj"
    is_false "$VJCCOMP" && options="$options -vjccomp"

    # Address/Control compression, protocol field compression,
    is_false "$AC" && options="$options -ac"
    is_false "$PC" && options="$options -pc"

    # BSD-Compression scheme
    if is_true "$BSDCOMP"; then
        options="$options bsdcomp 9,9"
    else
        options="$options -bsdcomp"
    fi
    # Stac compression
    if is_true "$LZS"; then
        # supports LZS check mode 3 and 4
        [ -n "$LZS_MODE" ] || LZS_MODE="4"
        [ "$LZS_MODE" = "3" ] && options="$options lzs 1"
        [ "$LZS_MODE" = "4" ] && options="$options lzs 1:4"
    fi

    # Set max receive and max transmit units
    [ -n "$MRU" ] && options="$options mru $MRU"
    [ -n "$MTU" ] && options="$options mtu $MTU"

    # set CBCP protocoll
    if is_true "$CBCP"; then
        if [ -n "$CBCP_MSN" ] ; then
            # User managed callback
            options="$options callback $CBCP_MSN"
        else
            # admin managed callback, it's enabled by default
            options="$options callback 6"
        fi
    else
        # Disable CBCP
        options="$options -callback-cbcp"
    fi

    # set CCP protocoll
    is_false "$CCP" && options="$options noccp"

    # set host name
    [ -n "$ISDN_HOSTNAME" ] && options="$options remotename $ISDN_HOSTNAME"

    # Set authentication
    for i in $AUTH ; do
        options="$options $i"
    done

    # add ppp options
    for i in $PPPOPTIONS ; do
        options="$options $i"
    done

    # check dns entry
    if [ -z "$DNS1" -a -z "$DNS2" ]; then
        options="$options ms-get-dns"
    else
        [ -n "$DNS1" ] && options="$options ms-dns $DNS1"
        [ -n "$DNS2" ] && options="$options ms-dns $DNS2"
    fi

    # set debug 
    is_true "$DEBUG" && options="-d $options"

    # set netmask, if available
    [ -n "$NETMASK" ] && {
        val=$(ipcalc --prefix $IPADDR $NETMASK)
        pfx=${val##PREFIX=}
    }
    # activate ISDN device
    /usr/bin/logger -p daemon.info -t ifup-ippp "ip addr add $IPADDR peer $GATEWAY${pfx:/$pfx} dev $DEVICE"
    ip addr add $IPADDR peer $GATEWAY${pfx:/$pfx} dev $DEVICE
    ip link set dev $DEVICE up

    if [ "$ENCAP" = "syncppp" ]; then
        # start ipppd daemon
        /usr/bin/logger -p daemon.info -t ifup-ippp "ipppd $options $netmask"
        ipppd $options $netmask >/dev/null 2>&1

        # start ibod daemon
        if ! is_true "$DIALIN"; then
            is_true "$BUNDLING" && [ -n "$SLAVE_DEVICE" ] && start_ibod $DEVICE
        fi
    fi

    # set default gateway for dial on demand
    if [ "$DIALMODE" = "auto" ] ; then
        echo 1 > /proc/sys/net/ipv4/ip_dynaddr
        if  is_true "$DEFROUTE" ; then
            if [ "$GATEWAY" = "0.0.0.0" ]; then
                ip route replace default ${METRIC:+metric $METRIC} dev ${DEVICE} >/dev/null 2>&1
            else
                ip route replace default ${METRIC:+metric $METRIC} via ${GATEWAY} dev ${DEVICE} >/dev/null 2>&1
            fi
        fi
    fi

    # Setup IPv6
    if ! is_false "$IPV6INIT" && ! [[ -z "$IPV6ADDR" ]]; then
        # Native IPv6 use of device configured, check of encapsulation required    
        if [ "$ENCAP" = "syncppp" ]; then
            echo $"Warning: ipppd (kernel 2.4.x and below) doesn't support IPv6 using encapsulation 'syncppp'"
        elif [ "$ENCAP" = "rawip" ]; then
            echo $"Warning: link doesn't support IPv6 using encapsulation 'rawip'"
        fi
    fi
    /etc/sysconfig/network-scripts/ifup-ipv6 $CONFIG
}

addprovider || exit 1

exit 0