isc-dhcp/Solaris/isc-dhcp.sh

#!/sbin/sh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#

#
# Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
#

. /lib/svc/share/smf_include.sh
. /lib/svc/share/net_include.sh

SVCPROP=/usr/bin/svcprop
CHMOD=/usr/bin/chmod
CHOWN=/usr/bin/chown
TOUCH=/usr/bin/touch
ID=/usr/bin/id

DHCPD_IPV4="svc:/network/dhcp/server:ipv4"
DHCPD_IPV6="svc:/network/dhcp/server:ipv6"
DHCPRELAY_IPV4="svc:/network/dhcp/relay:ipv4"
DHCPRELAY_IPV6="svc:/network/dhcp/relay:ipv6"

DHCPD_BIN="/usr/lib/inet/dhcpd"
DHCPRELAY_BIN="/usr/lib/inet/dhcrelay"

#
# dhcpd/dhcprelay can run in a global or exclusive-stack zone only
#
smf_configure_ip || exit $SMF_EXIT_OK

if [ -z $SMF_FMRI ]; then
    echo "SMF framework variables are not initialized."
    exit $SMF_EXIT_ERR
fi

#
# get_prop fmri propname
#
get_prop () {
    VALUE="`$SVCPROP -cp config/$1 $SMF_FMRI 2>/dev/null`"
    # Empty astring_list values show up as "" - do not return this.
    if [ "$VALUE" != "\"\"" ]; then
        echo $VALUE
    fi
}

errlog () {
    echo $1 >&2
}

get_common_options() {
    #
    # get debug property value
    #
    if [ "`get_prop debug`" = "true" ]; then
        DEBUG="-d"
    else
        DEBUG="-q"
    fi

    export OPTIONS="$OPTIONS $DEBUG"
    return 0
}

#
# expand_prop "prop_name" "var_name" [ argflag ]
#
#     prop_name     FMRI property name
#     var_name      variable where result is stored; initialized
#           to ""
#     argflag       The flag to be prepended to each property
#           value; optional argument
#
# This function will retrieve the properties for "prop_name" via a call
# to get_prop(). It will split-up the property values; it assumes that
# the delimiter is whitespace. It will then prepend "argflag" to each
# property value. The results will be stored in "var_name" which is
# passed by reference.
#
# Return values:
#
#     0         Success
#     1         Failure
#
expand_prop() {
    if [ $# -lt 2 ] || [ -z $2 ]; then
        errlog "Internal error - expand_prop() has incorrect arguments"
        return 1
    fi

    prop_name=$1
    typeset -n var_name=$2
    argflag="$3"

    prop_values="`get_prop $prop_name`"
    if [  -z "$prop_values" ]; then
        errlog "The property, \"${prop_name}\", is empty"
        return 1
    fi

    var_name=""
    for item in `IFS= ; set -- $prop_values; echo $@`; do
        var_name="$var_name $argflag $item"
    done

    return 0
}


get_dhcpd_options() {
    # get listen_ifname property value.
    LISTENIFNAMES="`get_prop listen_ifnames`"

    #
    # get common config file properties
    #
    CONFIGFILE=`get_prop config_file`
    if [ -z "$CONFIGFILE" ]; then
        errlog "No config_file specified, exiting"
        return 1
    fi
    if [ ! -f "$CONFIGFILE" ]; then
        errlog "Required config_file $CONFIGFILE not found, exiting"
        return 1
    fi

    #
    # If a leasefile does not exist, create an empty file.
    #
    LEASEFILE=`get_prop lease_file`
    if [ -z "$LEASEFILE" ]; then
        errlog "No lease_file specified, exiting"
        return 1
    fi

    LEASEFILE_PERMS="u=rw,go=r"
    if [ ! -f "$LEASEFILE" ]; then
        $TOUCH $LEASEFILE
        $CHMOD $LEASEFILE_PERMS $LEASEFILE
    fi
    if [ ! -w "$LEASEFILE" ]; then
        errlog "Lease file '$LEASEFILE' is not writable. You should:"
        errlog "$CHOWN $($ID -u -n) '$LEASEFILE'"
        errlog "$CHMOD $LEASEFILE_PERMS '$LEASEFILE'"
        return 1
    fi

    export OPTIONS="$OPTIONS -cf $CONFIGFILE -lf $LEASEFILE $LISTENIFNAMES"
    return 0
}

get_dhcprelay_options_v4() {
    #
    # Get append_agent_option V4 property value
    #
    if [ "`get_prop append_agent_option`" = "true" ]; then
        APPEND="-a -m append"
    else
        APPEND=""
    fi

    #
    # get listen_ifname property value and modify it.
    # If listen_ifnames property value is "e1000g01 iprb0" then the
    # command line option will look like  "-i e1000g0 -i iprb0"
    #
    IIFLIST=
    expand_prop listen_ifnames IIFLIST -i || return $?

    #
    # Get servers  V4 property value - command line option will look
    # like  "1.2.3.5" "4.5.6.7".
    #
    # NOTE: By default server property value is empty. User must
    # first specify a server using svccfg/setprop command
    # before enabling service.
    #
    DHCPSERVERS=`get_prop servers`
    if [  -z "$DHCPSERVERS" ]; then
        errlog 'Must specify at least one "servers" property value, exiting'
        return 1
    fi

    export OPTIONS="$OPTIONS -4 $APPEND $IIFLIST $DHCPSERVERS"
    return 0
}

get_dhcprelay_options_v6() {
    #
    # Get receivelinks  V6 property value and modify it:
    # Given property values of "1.2.3.4%bge0#1 bge2,1.2.3.4%iprb",
    # the command line option will look like  "-l 1.2.3.4%bge0#1 -l
    # bge2 -l 1.2.3.4%iprb".
    #
    # NOTE: By default receivelinks value is empty. User must
    # first specify a server using svccfg/setprop command
    # before enabling service.
    #
    IRECVLINKS=
    expand_prop receive_query_links IRECVLINKS -l || return $?
    #
    # Get forwardlinks V6 property value and modify it:
    # Given forward_query_links property value is "1.2.3.4%bge0 bge2,"
    # then the command line option will look like  "-u 1.2.3.4%bge0 -u
    # bge2"
    #
    # NOTE: By default forwardlinks value is empty. User must
    # first specify a server using svccfg/setprop command
    # before enabling service.
    #
    IFWDLINKS=
    expand_prop forward_query_links IFWDLINKS -u || return $?

    export OPTIONS="$OPTIONS -6 $IRECVLINKS $IFWDLINKS"
}

export OPTIONS="--no-pid"

case "$SMF_FMRI" in
"$DHCPD_IPV4"|"$DHCPD_IPV6")
    # get omapi_conn_limit property value.
    export OMAPI_CONN_LIMIT=`get_prop omapi_conn_limit`

    get_common_options
    if [ "$?" != "0" ]; then
        exit $SMF_EXIT_ERR_CONFIG
    fi
    get_dhcpd_options
    if [ "$?" != "0" ]; then
        exit $SMF_EXIT_ERR_CONFIG
    fi
    if [ "$SMF_FMRI" = "$DHCPD_IPV4" ]; then
        OPTIONS="-4 $OPTIONS"
    else
        OPTIONS="-6 $OPTIONS"
    fi
    export EXECFILE=$DHCPD_BIN
    ;;

$DHCPRELAY_IPV4)
    get_common_options
    if [ $? != "0" ]; then
        exit $SMF_EXIT_ERR_CONFIG
    fi
    get_dhcprelay_options_v4
    if [ $? != "0" ]; then
        exit $SMF_EXIT_ERR_CONFIG
    fi
    export EXECFILE=$DHCPRELAY_BIN
    ;;

$DHCPRELAY_IPV6)
    get_common_options
    if [ $? != "0" ]; then
        exit $SMF_EXIT_ERR_CONFIG
    fi
    get_dhcprelay_options_v6
    if [ $? != "0" ]; then
        exit $SMF_EXIT_ERR_CONFIG
    fi
    export EXECFILE=$DHCPRELAY_BIN
    ;;

*)
        echo "isc-dhcp must be invoked from within SMF"
        exit $SMF_EXIT_ERR_FATAL
    ;;

esac

# Now start the daemon
if [ "$DEBUG" = "-d" ]; then
    $EXECFILE $OPTIONS &
else
    $EXECFILE $OPTIONS
fi

if [ "$?" != "0" ]; then
    exit $SMF_EXIT_ERR_FATAL
fi

exit $SMF_EXIT_OK