Merge branch 'release/v0.2.0'

Conflicts:
	README.txt

1 files changed, 596 insertions, 0 deletions

diff --git a/pkg/osx/install/client.up.sh b/pkg/osx/install/client.up.sh
new file mode 100755
index 00000000..fc7e341a
--- /dev/null
+++ b/pkg/osx/install/client.up.sh
@@ -0,0 +1,596 @@
+#!/bin/bash -e
+# Note: must be bash; uses bash-specific tricks
+#
+# ******************************************************************************************************************
+# This Tunnelblick script does everything! It handles TUN and TAP interfaces, 
+# pushed configurations, DHCP with DNS and WINS, and renewed DHCP leases. :)
+# 
+# This is the "Up" version of the script, executed after the interface is 
+# initialized.
+#
+# Created by: Nick Williams (using original code and parts of old Tblk scripts)
+# 
+# ******************************************************************************************************************
+
+trap "" TSTP
+trap "" HUP
+trap "" INT
+export PATH="/bin:/sbin:/usr/sbin:/usr/bin"
+
+# Process optional arguments (if any) for the script
+# Each one begins with a "-"
+# They come from Tunnelblick, and come first, before the OpenVPN arguments
+# So we set ARG_ script variables to their values and shift them out of the argument list
+# When we're done, only the OpenVPN arguments remain for the rest of the script to use
+ARG_MONITOR_NETWORK_CONFIGURATION="false"
+ARG_RESTORE_ON_DNS_RESET="false"
+ARG_RESTORE_ON_WINS_RESET="false"
+ARG_TAP="false"
+ARG_IGNORE_OPTION_FLAGS=""
+
+while [ {$#} ] ; do
+	if [ "$1" = "-m" ] ; then						# Handle the arguments we know about
+		ARG_MONITOR_NETWORK_CONFIGURATION="true"	# by setting ARG_ script variables to their values
+		shift										# Then shift them out
+	elif [ "$1" = "-d" ] ; then
+		ARG_RESTORE_ON_DNS_RESET="true"
+		shift
+	elif [ "$1" = "-w" ] ; then
+		ARG_RESTORE_ON_WINS_RESET="true"
+		shift
+	elif [ "$1" = "-a" ] ; then
+		ARG_TAP="true"
+		shift
+	elif [ "${1:0:2}" = "-i" ] ; then
+		ARG_IGNORE_OPTION_FLAGS="${1}"
+		shift
+	elif [ "${1:0:2}" = "-a" ] ; then
+		ARG_IGNORE_OPTION_FLAGS="${1}"
+		shift
+	else
+		if [ "${1:0:1}" = "-" ] ; then				# Shift out Tunnelblick arguments (they start with "-") that we don't understand
+			shift									# so the rest of the script sees only the OpenVPN arguments
+		else
+			break
+		fi
+	fi
+done
+
+readonly ARG_MONITOR_NETWORK_CONFIGURATION ARG_RESTORE_ON_DNS_RESET ARG_RESTORE_ON_WINS_RESET ARG_TAP ARG_IGNORE_OPTION_FLAGS
+
+# Note: The script log path name is constructed from the path of the regular config file, not the shadow copy
+# if the config is shadow copy, e.g. /Library/Application Support/Tunnelblick/Users/Jonathan/Folder/Subfolder/config.ovpn
+# then convert to regular config     /Users/Jonathan/Library/Application Support/Tunnelblick/Configurations/Folder/Subfolder/config.ovpn
+#      to get the script log path
+# Note: "/Users/..." works even if the home directory has a different path; it is used in the name of the log file, and is not used as a path to get to anything.
+readonly TBALTPREFIX="/Library/Application Support/Tunnelblick/Users/"
+readonly TBALTPREFIXLEN="${#TBALTPREFIX}"
+readonly TBCONFIGSTART="${config:0:$TBALTPREFIXLEN}"
+if [ "$TBCONFIGSTART" = "$TBALTPREFIX" ] ; then
+	readonly TBBASE="${config:$TBALTPREFIXLEN}"
+	readonly TBSUFFIX="${TBBASE#*/}"
+	readonly TBUSERNAME="${TBBASE%%/*}"
+	readonly TBCONFIG="/Users/$TBUSERNAME/Library/Application Support/Tunnelblick/Configurations/$TBSUFFIX"
+else
+    readonly TBCONFIG="${config}"
+fi
+
+readonly CONFIG_PATH_DASHES_SLASHES="$(echo "${TBCONFIG}" | sed -e 's/-/--/g' | sed -e 's/\//-S/g')"
+readonly SCRIPT_LOG_FILE="/Library/Application Support/Tunnelblick/Logs/${CONFIG_PATH_DASHES_SLASHES}.script.log"
+
+readonly TB_RESOURCE_PATH=$(dirname "${0}")
+
+LEASEWATCHER_PLIST_PATH="/Library/Application Support/Tunnelblick/LeaseWatch.plist"
+
+readonly OSVER="$(sw_vers | grep 'ProductVersion:' | grep -o '10\.[0-9]*')"
+
+readonly DEFAULT_DOMAIN_NAME="openvpn"
+
+bRouteGatewayIsDhcp="false"
+
+# @param String message - The message to log
+readonly LOG_MESSAGE_COMMAND=$(basename "${0}")
+logMessage()
+{
+	echo "$(date '+%a %b %e %T %Y') *Tunnelblick $LOG_MESSAGE_COMMAND: "${@} >> "${SCRIPT_LOG_FILE}"
+}
+
+# @param String string - Content to trim
+trim()
+{
+	echo ${@}
+}
+
+# @param String[] dnsServers - The name servers to use
+# @param String domainName - The domain name to use
+# @param \optional String[] winsServers - The WINS servers to use
+setDnsServersAndDomainName()
+{
+	declare -a vDNS=("${!1}")
+	domain=$2
+	declare -a vWINS=("${!3}")
+	
+	set +e # "grep" will return error status (1) if no matches are found, so don't fail on individual errors
+	
+	PSID=$( (scutil | grep PrimaryService | sed -e 's/.*PrimaryService : //')<<- EOF
+		open
+		show State:/Network/Global/IPv4
+		quit
+EOF )
+	
+	STATIC_DNS_CONFIG="$( (scutil | sed -e 's/^[[:space:]]*[[:digit:]]* : //g' | tr '\n' ' ')<<- EOF
+		open
+		show Setup:/Network/Service/${PSID}/DNS
+		quit
+EOF )"
+	if echo "${STATIC_DNS_CONFIG}" | grep -q "ServerAddresses" ; then
+		readonly STATIC_DNS="$(trim "$( echo "${STATIC_DNS_CONFIG}" | sed -e 's/^.*ServerAddresses[^{]*{[[:space:]]*\([^}]*\)[[:space:]]*}.*$/\1/g' )")"
+	fi
+	if echo "${STATIC_DNS_CONFIG}" | grep -q "SearchDomains" ; then
+		readonly STATIC_SEARCH="$(trim "$( echo "${STATIC_DNS_CONFIG}" | sed -e 's/^.*SearchDomains[^{]*{[[:space:]]*\([^}]*\)[[:space:]]*}.*$/\1/g' )")"
+	fi
+	
+	STATIC_WINS_CONFIG="$( (scutil | sed -e 's/^[[:space:]]*[[:digit:]]* : //g' | tr '\n' ' ')<<- EOF
+		open
+		show Setup:/Network/Service/${PSID}/SMB
+		quit
+EOF )"
+    STATIC_WINS_SERVERS=""
+    STATIC_WORKGROUP=""
+    STATIC_NETBIOSNAME=""
+    if echo "${STATIC_WINS_CONFIG}" | grep -q "WINSAddresses" ; then
+        STATIC_WINS_SERVERS="$(trim "$( echo "${STATIC_WINS_CONFIG}" | sed -e 's/^.*WINSAddresses[^{]*{[[:space:]]*\([^}]*\)[[:space:]]*}.*$/\1/g' )")"
+    fi
+    if echo "${STATIC_WINS_CONFIG}" | grep -q "Workgroup" ; then
+        STATIC_WORKGROUP="$(trim "$( echo "${STATIC_WINS_CONFIG}" | sed -e 's/^.*Workgroup : \([^[:space:]]*\).*$/\1/g' )")"
+    fi
+    if echo "${STATIC_WINS_CONFIG}" | grep -q "NetBIOSName" ; then
+        STATIC_NETBIOSNAME="$(trim "$( echo "${STATIC_WINS_CONFIG}" | sed -e 's/^.*NetBIOSName : \([^[:space:]]*\).*$/\1/g' )")"
+    fi
+    readonly STATIC_WINS_SERVERS STATIC_WORKGROUP STATIC_NETBIOSNAME
+    
+	if [ ${#vDNS[*]} -eq 0 ] ; then
+		DYN_DNS="false"
+		ALL_DNS="${STATIC_DNS}"
+	elif [ -n "${STATIC_DNS}" ] ; then
+		case "${OSVER}" in
+			10.6 | 10.7 )
+				# Do nothing - in 10.6 we don't aggregate our configurations, apparently
+				DYN_DNS="false"
+				ALL_DNS="${STATIC_DNS}"
+				;;
+			10.4 | 10.5 )
+				DYN_DNS="true"
+				# We need to remove duplicate DNS entries, so that our reference list matches MacOSX's
+				SDNS="$(echo "${STATIC_DNS}" | tr ' ' '\n')"
+				(( i=0 ))
+				for n in "${vDNS[@]}" ; do
+					if echo "${SDNS}" | grep -q "${n}" ; then
+						unset vDNS[${i}]
+					fi
+					(( i++ ))
+				done
+				if [ ${#vDNS[*]} -gt 0 ] ; then
+					ALL_DNS="$(trim "${STATIC_DNS}" "${vDNS[*]}")"
+				else
+					DYN_DNS="false"
+					ALL_DNS="${STATIC_DNS}"
+				fi
+				;;
+		esac
+	else
+		DYN_DNS="true"
+		ALL_DNS="$(trim "${vDNS[*]}")"
+	fi
+	readonly DYN_DNS ALL_DNS
+
+	if [ ${#vWINS[*]} -eq 0 ] ; then
+		DYN_WINS="false"
+		ALL_WINS_SERVERS="${STATIC_WINS_SERVERS}"
+	elif [ -n "${STATIC_WINS_SERVERS}" ] ; then
+		case "${OSVER}" in
+			10.6 | 10.7 )
+				# Do nothing - in 10.6 we don't aggregate our configurations, apparently
+				DYN_WINS="false"
+				ALL_WINS_SERVERS="${STATIC_WINS_SERVERS}"
+				;;
+			10.4 | 10.5 )
+				DYN_WINS="true"
+				# We need to remove duplicate WINS entries, so that our reference list matches MacOSX's
+				SWINS="$(echo "${STATIC_WINS_SERVERS}" | tr ' ' '\n')"
+				(( i=0 ))
+				for n in "${vWINS[@]}" ; do
+					if echo "${SWINS}" | grep -q "${n}" ; then
+						unset vWINS[${i}]
+					fi
+					(( i++ ))
+				done
+				if [ ${#vWINS[*]} -gt 0 ] ; then
+					ALL_WINS_SERVERS="$(trim "${STATIC_WINS_SERVERS}" "${vWINS[*]}")"
+				else
+					DYN_WINS="false"
+					ALL_WINS_SERVERS="${STATIC_WINS_SERVERS}"
+				fi
+				;;
+		esac
+	else
+		DYN_WINS="true"
+		ALL_WINS_SERVERS="$(trim "${vWINS[*]}")"
+	fi
+	readonly DYN_WINS ALL_WINS_SERVERS
+
+	# We double-check that our search domain isn't already on the list
+	SEARCH_DOMAIN="${domain}"
+	case "${OSVER}" in
+		10.6 | 10.7 )
+			# Do nothing - in 10.6 we don't aggregate our configurations, apparently
+			if [ -n "${STATIC_SEARCH}" ] ; then
+				ALL_SEARCH="${STATIC_SEARCH}"
+				SEARCH_DOMAIN=""
+			else
+				ALL_SEARCH="${SEARCH_DOMAIN}"
+			fi
+			;;
+		10.4 | 10.5 )
+			if echo "${STATIC_SEARCH}" | tr ' ' '\n' | grep -q "${SEARCH_DOMAIN}" ; then
+				SEARCH_DOMAIN=""
+			fi
+			if [ -z "${SEARCH_DOMAIN}" ] ; then
+				ALL_SEARCH="${STATIC_SEARCH}"
+			else
+				ALL_SEARCH="$(trim "${STATIC_SEARCH}" "${SEARCH_DOMAIN}")"
+			fi
+			;;
+	esac
+	readonly SEARCH_DOMAIN ALL_SEARCH
+
+	if ! ${DYN_DNS} ; then
+		NO_DNS="#"
+	fi
+	if ! ${DYN_WINS} ; then
+		NO_WS="#"
+	fi
+	if [ -z "${SEARCH_DOMAIN}" ] ; then
+		NO_SEARCH="#"
+	fi
+	if [ -z "${STATIC_WORKGROUP}" ] ; then
+		NO_WG="#"
+	fi
+	if [ -z "${STATIC_NETBIOSNAME}" ] ; then
+		NO_NB="#"
+	fi
+	if [ -z "${ALL_DNS}" ] ; then
+		AGG_DNS="#"
+	fi
+	if [ -z "${ALL_SEARCH}" ] ; then
+		AGG_SEARCH="#"
+	fi
+	if [ -z "${ALL_WINS_SERVERS}" ] ; then
+		AGG_WINS="#"
+	fi
+	
+	# Now, do the aggregation
+	# Save the openvpn process ID and the Network Primary Service ID, leasewather.plist path, logfile path, and optional arguments from Tunnelblick,
+	# then save old and new DNS and WINS settings
+	# PPID is a bash-script variable that contains the process ID of the parent of the process running the script (i.e., OpenVPN's process ID)
+	# config is an environmental variable set to the configuration path by OpenVPN prior to running this up script
+	logMessage "Up to two 'No such key' warnings are normal and may be ignored"
+	
+	# If DNS is manually set, it overrides the DHCP setting, which isn't reflected in 'State:/Network/Service/${PSID}/DNS'
+	if echo "${STATIC_DNS_CONFIG}" | grep -q "ServerAddresses" ; then
+		CORRECT_OLD_DNS_KEY="Setup:"
+	else
+		CORRECT_OLD_DNS_KEY="State:"
+	fi
+	
+	# If WINS is manually set, it overrides the DHCP setting, which isn't reflected in 'State:/Network/Service/${PSID}/DNS'
+	if echo "${STATIC_WINS_CONFIG}" | grep -q "WINSAddresses" ; then
+		CORRECT_OLD_WINS_KEY="Setup:"
+	else
+		CORRECT_OLD_WINS_KEY="State:"
+	fi
+	
+    # If we are not expecting any WINS value, add <TunnelblickNoSuchKey : true> to the expected WINS setup
+    NO_NOSUCH_KEY_WINS="#"
+    if [ "${NO_NB}" = "#" -a "${AGG_WINS}" = "#" -a "${NO_WG}" = "#" ] ; then
+        NO_NOSUCH_KEY_WINS=""
+    fi
+    readonly NO_NOSUCH_KEY_WINS
+    
+	set -e # We instruct bash that it CAN again fail on errors
+
+	scutil <<- EOF
+		open
+		d.init
+		d.add PID # ${PPID}
+		d.add Service ${PSID}
+		d.add LeaseWatcherPlistPath "${LEASEWATCHER_PLIST_PATH}"
+		d.add ScriptLogFile         "${SCRIPT_LOG_FILE}"
+		d.add MonitorNetwork        "${ARG_MONITOR_NETWORK_CONFIGURATION}"
+		d.add RestoreOnDNSReset     "${ARG_RESTORE_ON_DNS_RESET}"
+		d.add RestoreOnWINSReset    "${ARG_RESTORE_ON_WINS_RESET}"
+		d.add IgnoreOptionFlags     "${ARG_IGNORE_OPTION_FLAGS}"
+		d.add IsTapInterface        "${ARG_TAP}"
+		d.add RouteGatewayIsDhcp    "${bRouteGatewayIsDhcp}"
+		set State:/Network/OpenVPN
+		
+		# First, back up the device's current DNS and WINS configurations
+		# Indicate 'no such key' by a dictionary with a single entry: "TunnelblickNoSuchKey : true"
+		d.init
+		d.add TunnelblickNoSuchKey true
+		get ${CORRECT_OLD_DNS_KEY}/Network/Service/${PSID}/DNS
+		set State:/Network/OpenVPN/OldDNS
+		
+		d.init
+		d.add TunnelblickNoSuchKey true
+		get ${CORRECT_OLD_WINS_KEY}/Network/Service/${PSID}/SMB
+		set State:/Network/OpenVPN/OldSMB
+		
+		# Second, initialize the new DNS map
+		d.init
+		${NO_DNS}d.add ServerAddresses * ${vDNS[*]}
+		${NO_SEARCH}d.add SearchDomains * ${SEARCH_DOMAIN}
+		d.add DomainName ${domain}
+		set State:/Network/Service/${PSID}/DNS
+		
+		# Third, initialize the WINS map
+		d.init
+		${NO_NB}d.add NetBIOSName ${STATIC_NETBIOSNAME}
+		${NO_WS}d.add WINSAddresses * ${vWINS[*]}
+		${NO_WG}d.add Workgroup ${STATIC_WORKGROUP}
+		set State:/Network/Service/${PSID}/SMB
+		
+		# Now, initialize the maps that will be compared against the system-generated map
+		# which means that we will have to aggregate configurations of statically-configured
+		# nameservers, and statically-configured search domains
+		d.init
+		${AGG_DNS}d.add ServerAddresses * ${ALL_DNS}
+		${AGG_SEARCH}d.add SearchDomains * ${ALL_SEARCH}
+		d.add DomainName ${domain}
+		set State:/Network/OpenVPN/DNS
+		
+		d.init
+		${NO_NB}d.add NetBIOSName ${STATIC_NETBIOSNAME}
+		${AGG_WINS}d.add WINSAddresses * ${ALL_WINS_SERVERS}
+		${NO_WG}d.add Workgroup ${STATIC_WORKGROUP}
+        ${NO_NOSUCH_KEY_WINS}d.add TunnelblickNoSuchKey true
+		set State:/Network/OpenVPN/SMB
+		
+		# We are done
+		quit
+EOF
+	
+	logMessage "Saved the DNS and WINS configurations for later use"
+	
+	if ${ARG_MONITOR_NETWORK_CONFIGURATION} ; then
+        if [ "${ARG_IGNORE_OPTION_FLAGS:0:2}" = "-a" ] ; then
+            # Generate an updated plist with the path for process-network-changes
+            readonly LEASEWATCHER_TEMPLATE_PATH="$(dirname "${0}")/ProcessNetworkChanges.plist.template"
+            sed -e "s|\${DIR}|$(dirname "${0}")|g" "${LEASEWATCHER_TEMPLATE_PATH}" > "${LEASEWATCHER_PLIST_PATH}"
+            launchctl load "${LEASEWATCHER_PLIST_PATH}"
+            logMessage "Set up to monitor system configuration with process-network-changes"
+        else
+            # Generate an updated plist with the path for leasewatch
+            readonly LEASEWATCHER_TEMPLATE_PATH="$(dirname "${0}")/LeaseWatch.plist.template"
+            sed -e "s|\${DIR}|$(dirname "${0}")|g" "${LEASEWATCHER_TEMPLATE_PATH}" > "${LEASEWATCHER_PLIST_PATH}"
+            launchctl load "${LEASEWATCHER_PLIST_PATH}"
+            logMessage "Set up to monitor system configuration with leasewatch"
+        fi
+	fi
+}
+
+configureDhcpDns()
+{
+	# whilst ipconfig will have created the neccessary Network Service keys, the DNS
+	# settings won't actually be used by OS X unless the SupplementalMatchDomains key
+	# is added
+	# ref. <http://lists.apple.com/archives/Macnetworkprog/2005/Jun/msg00011.html>
+	# - is there a way to extract the domains from the SC dictionary and re-insert
+	#   as SupplementalMatchDomains? i.e. not requiring the ipconfig domain_name call?
+	
+	# - wait until we get a lease before extracting the DNS domain name and merging into SC
+	# - despite it's name, ipconfig waitall doesn't (but maybe one day it will :-)
+	ipconfig waitall
+	
+	unset test_domain_name
+	unset test_name_server
+	
+	set +e # We instruct bash NOT to exit on individual command errors, because if we need to wait longer these commands will fail
+	
+	# usually takes at least a few seconds to get a DHCP lease
+	sleep 3
+	n=0
+	while [ -z "$test_domain_name" -a -z "$test_name_server" -a $n -lt 5 ]
+	do
+		logMessage "Sleeping for $n seconds to wait for DHCP to finish setup."
+		sleep $n
+		n=`expr $n + 1`
+		
+		if [ -z "$test_domain_name" ]; then
+			test_domain_name=`ipconfig getoption $dev domain_name 2>/dev/null`
+		fi
+		
+		if [ -z "$test_name_server" ]; then
+			test_name_server=`ipconfig getoption $dev domain_name_server 2>/dev/null`
+		fi
+	done
+	
+	sGetPacketOutput=`ipconfig getpacket $dev`
+	
+	set -e # We instruct bash that it CAN again fail on individual errors
+	
+	#echo "`date` test_domain_name = $test_domain_name, test_name_server = $test_name_server, sGetPacketOutput = $sGetPacketOutput"
+	
+	unset aNameServers
+	unset aWinsServers
+	
+	nNameServerIndex=1
+	nWinsServerIndex=1
+	
+	if [ "$sGetPacketOutput" ]; then
+		sGetPacketOutput_FirstLine=`echo "$sGetPacketOutput"|head -n 1`
+		#echo $sGetPacketOutput_FirstLine
+		
+		if [ "$sGetPacketOutput_FirstLine" == "op = BOOTREPLY" ]; then
+			set +e # "grep" will return error status (1) if no matches are found, so don't fail on individual errors
+			
+			for tNameServer in `echo "$sGetPacketOutput"|grep "domain_name_server"|grep -Eo "\{([0-9\.]+)(, [0-9\.]+)*\}"|grep -Eo "([0-9\.]+)"`; do
+				aNameServers[nNameServerIndex-1]="$(trim "$tNameServer")"
+				let nNameServerIndex++
+			done
+			
+			for tWINSServer in `echo "$sGetPacketOutput"|grep "nb_over_tcpip_name_server"|grep -Eo "\{([0-9\.]+)(, [0-9\.]+)*\}"|grep -Eo "([0-9\.]+)"`; do
+				aWinsServers[nWinsServerIndex-1]="$(trim "$tWINSServer")"
+				let nWinsServerIndex++
+			done
+			
+			sDomainName=`echo "$sGetPacketOutput"|grep "domain_name "|grep -Eo ": [-A-Za-z0-9\-\.]+"|grep -Eo "[-A-Za-z0-9\-\.]+"`
+			sDomainName="$(trim "$sDomainName")"
+			
+			if [ ${#aNameServers[*]} -gt 0 -a "$sDomainName" ]; then
+				logMessage "Retrieved name server(s) [ ${aNameServers[@]} ], domain name [ $sDomainName ], and WINS server(s) [ ${aWinsServers[@]} ]"
+				setDnsServersAndDomainName aNameServers[@] "$sDomainName" aWinsServers[@]
+				return 0
+			elif [ ${#aNameServers[*]} -gt 0 ]; then
+				logMessage "Retrieved name server(s) [ ${aNameServers[@]} ] and WINS server(s) [ ${aWinsServers[@]} ] and using default domain name [ $DEFAULT_DOMAIN_NAME ]"
+				setDnsServersAndDomainName aNameServers[@] "$DEFAULT_DOMAIN_NAME" aWinsServers[@]
+				return 0
+			else
+				# Should we return 1 here and indicate an error, or attempt the old method?
+				logMessage "No useful information extracted from DHCP/BOOTP packet. Attempting legacy configuration."
+			fi
+			
+			set -e # We instruct bash that it CAN again fail on errors
+		else
+			# Should we return 1 here and indicate an error, or attempt the old method?
+			logMessage "No DHCP/BOOTP packet found on interface. Attempting legacy configuration."
+		fi
+	fi
+	
+	unset sDomainName
+	unset sNameServer
+	unset aNameServers
+	
+	sDomainName=`ipconfig getoption $dev domain_name 2>/dev/null`
+	sNameServer=`ipconfig getoption $dev domain_name_server 2>/dev/null`
+	
+	sDomainName="$(trim "$sDomainName")"
+	sNameServer="$(trim "$sNameServer")"
+	
+	declare -a aWinsServers=( ) # Declare empty WINS array to avoid any useless error messages
+	
+	if [ "$sDomainName" -a "$sNameServer" ]; then
+		aNameServers[0]=$sNameServer
+		logMessage "Retrieved name server [ $sNameServer ], domain name [ $sDomainName ], and no WINS servers"
+		setDnsServersAndDomainName aNameServers[@] "$sDomainName" aWinsServers[@]
+	elif [ "$sNameServer" ]; then
+		aNameServers[0]=$sNameServer
+		logMessage "Retrieved name server [ $sNameServer ] and no WINS servers, and using default domain name [ $DEFAULT_DOMAIN_NAME ]"
+		setDnsServersAndDomainName aNameServers[@] "$DEFAULT_DOMAIN_NAME" aWinsServers[@]
+	elif [ "$sDomainName" ]; then
+		logMessage "WARNING: Retrieved domain name [ $sDomainName ] but no name servers from OpenVPN (DHCP), which is not sufficient to make network/DNS configuration changes."
+		if ${ARG_MONITOR_NETWORK_CONFIGURATION} ; then
+			logMessage "Will NOT monitor for other network configuration changes."
+		fi
+	else
+		logMessage "WARNING: No DNS information received from OpenVPN (DHCP), so no network/DNS configuration changes need to be made."
+		if ${ARG_MONITOR_NETWORK_CONFIGURATION} ; then
+			logMessage "Will NOT monitor for other network configuration changes."
+		fi
+	fi
+	
+	return 0
+}
+
+configureOpenVpnDns()
+{
+	unset vForOptions
+	unset vOptions
+	unset aNameServers
+	unset aWinsServers
+	
+	nOptionIndex=1
+	nNameServerIndex=1
+	nWinsServerIndex=1
+
+	while vForOptions=foreign_option_$nOptionIndex; [ -n "${!vForOptions}" ]; do
+		vOptions[nOptionIndex-1]=${!vForOptions}
+		case ${vOptions[nOptionIndex-1]} in
+			*DOMAIN* )
+				sDomainName="$(trim "${vOptions[nOptionIndex-1]//dhcp-option DOMAIN /}")"
+				;;
+			*DNS*    )
+				aNameServers[nNameServerIndex-1]="$(trim "${vOptions[nOptionIndex-1]//dhcp-option DNS /}")"
+				let nNameServerIndex++
+				;;
+			*WINS*   )
+				aWinsServers[nWinsServerIndex-1]="$(trim "${vOptions[nOptionIndex-1]//dhcp-option WINS /}")"
+				let nWinsServerIndex++
+				;;
+            *   )
+                logMessage "Unknown: 'foreign_option_${nOptionIndex}' = '${vOptions[nOptionIndex-1]}'"
+                ;;
+		esac
+		let nOptionIndex++
+	done
+	
+	if [ ${#aNameServers[*]} -gt 0 -a "$sDomainName" ]; then
+		logMessage "Retrieved name server(s) [ ${aNameServers[@]} ], domain name [ $sDomainName ], and WINS server(s) [ ${aWinsServers[@]} ]"
+		setDnsServersAndDomainName aNameServers[@] "$sDomainName" aWinsServers[@]
+	elif [ ${#aNameServers[*]} -gt 0 ]; then
+		logMessage "Retrieved name server(s) [ ${aNameServers[@]} ] and WINS server(s) [ ${aWinsServers[@]} ] and using default domain name [ $DEFAULT_DOMAIN_NAME ]"
+		setDnsServersAndDomainName aNameServers[@] "$DEFAULT_DOMAIN_NAME" aWinsServers[@]
+	else
+		# Should we maybe just return 1 here to indicate an error? Does this mean that something bad has happened?
+		logMessage "No DNS information recieved from OpenVPN, so no network configuration changes need to be made."
+		if ${ARG_MONITOR_NETWORK_CONFIGURATION} ; then
+			logMessage "Will NOT monitor for other network configuration changes."
+		fi
+	fi
+	
+	return 0
+}
+
+# We sleep here to allow time for OS X to process network settings
+sleep 2
+
+EXIT_CODE=0
+
+if ${ARG_TAP} ; then
+	# Still need to do: Look for route-gateway dhcp (TAP isn't always DHCP)
+	bRouteGatewayIsDhcp="false"
+	if [ -z "${route_vpn_gateway}" -o "$route_vpn_gateway" == "dhcp" -o "$route_vpn_gateway" == "DHCP" ]; then
+		bRouteGatewayIsDhcp="true"
+	fi
+	
+	if [ "$bRouteGatewayIsDhcp" == "true" ]; then
+		if [ -z "$dev" ]; then
+			logMessage "Cannot configure TAP interface for DHCP without \$dev being defined. Exiting."
+			exit 1
+		fi
+		
+		ipconfig set "$dev" DHCP
+		
+		configureDhcpDns &
+	elif [ "$foreign_option_1" == "" ]; then
+		logMessage "No network configuration changes need to be made."
+		if ${ARG_MONITOR_NETWORK_CONFIGURATION} ; then
+			logMessage "Will NOT monitor for other network configuration changes."
+		fi
+	else
+		configureOpenVpnDns
+		EXIT_CODE=$?
+	fi
+else
+	if [ "$foreign_option_1" == "" ]; then
+		logMessage "No network configuration changes need to be made."
+		if ${ARG_MONITOR_NETWORK_CONFIGURATION} ; then
+			logMessage "Will NOT monitor for other network configuration changes."
+		fi
+	else
+		configureOpenVpnDns
+		EXIT_CODE=$?
+	fi
+fi
+
+exit $EXIT_CODE