First Commit

3 files changed, 1157 insertions, 0 deletions

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..b6fd9f1
--- /dev/null
+++ b/README.md
@@ -0,0 +1,18 @@
+# setnet.sh #
+
+This is a simple bash+dialog script to configure and manage network
+interfaces. At the moment, it is only able to bring up ethernet and
+wi-fi networks (WPA/WPA2/ESS), using either static or dhcp-based IP
+configuration.
+
+## Dependencies ##
+
+setnet.sh depends on the following packages:
+
+- bash (maybe dash/sh could be enough...)
+- dialog
+- wpa_supplicant
+- dhclient
+- iproute2
+
+
diff --git a/setnet.sh b/setnet.sh
new file mode 100755
index 0000000..e5cba98
--- /dev/null
+++ b/setnet.sh
@@ -0,0 +1,1120 @@
+#!/bin/bash
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or (at
+# your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# ----------------------------------------------------------------------
+#
+#   setnet.sh -- view and configure network interfaces
+#
+# ----------------------------------------------------------------------
+#
+# (c) KatolaZ (katolaz@freaknet.org) -- 2016/12/26
+#
+#
+
+
+##
+## Initialisation
+## 
+
+VERSION=0.1
+
+DIALOGRC=~/.dialogrc
+
+
+TOPSTR="setnet-0.1 [user: `id -run`]"
+
+DIALOG="dialog --backtitle \"${TOPSTR}\" "
+
+
+
+TMPFILE=`(tempfile) 2>/dev/null` || tempfile=/tmp/setnet_$$
+WPA_PIDFILE=`(tempfile) 2>/dev/null` || tempfile=/tmp/setnet_wpapid_$$
+
+WINDOW_WIDTH=75
+WINDOW_HEIGHT=20
+
+INFO_WIDTH=40
+INFO_HEIGHT=10
+
+FORM_WIDTH=60
+FORM_HEIGHT=12
+
+NET_FAMILIES="inet inet6"
+
+##
+## Load setnetrc 
+##
+
+function load_setnetrc(){
+
+	WPA_FILE=""
+	LOGFILE=""
+	## If we were given a parameter, is the rc file to load...
+	##	
+	if [ $# -ge 1 ]; then
+		. $1
+		return
+	fi
+	
+	##
+	## Otherwise, let's look in the standard locations, namely:
+	##
+
+	##
+	## 1) /etc/setnetrc
+	##
+
+	if [ -f /etc/setnetrc ]; then
+		. /etc/setnetrc
+	fi
+
+	##
+	## 2) ~/.setnetrc
+	##
+
+	if [ -f ~/.setnetrc ]; then
+		. ~/.setnetrc
+	fi
+
+
+	if [ -z ${WPA_FILE} ]; then
+		echo "Could not find WPA_FILE defined anywhere. Exiting"
+		exit 1
+	fi
+
+	if [ -z ${LOGFILE} ]; then
+		echo "Could not find LOGFILE defined anywhere. Exiting"
+		exit 1
+	fi
+}
+
+
+function cleanup(){
+	rm -f ${TMPFILE}
+	rm -f ${WPA_PIDFILE}
+}
+
+
+###################
+#                 #
+#     LOGGING     #
+#                 #
+###################
+
+##
+## log() takes two arguments, namely the label and the message
+##
+## if the label is "_self", print the name of the function which
+## called log()
+##
+function log(){
+
+	local LABEL=$1
+	local MSG=$2
+
+	if [ ${LABEL} == "_self" ]; then
+		LABEL=${FUNCNAME[1]}
+	fi
+	echo -e "${LABEL}:" "${MSG}" >> "${LOGFILE}"
+	
+}
+
+##########################################
+
+function edit_file(){
+
+	local FILEIN=$1
+	log "edit_file" "editing file ${FILEIN}"
+	eval "${DIALOG} --title 'Editing file: ${FILEIN}' \
+			--editbox ${FILEIN} ${WINDOW_HEIGHT} ${WINDOW_WIDTH} 2> ${TMPFILE}"
+
+	if [ $? -eq 0 ]; then
+		log "edit_file" "Copying ${TMPFILE} into ${FILEIN}"
+		if cp ${TMPFILE} ${FILEIN}
+		then
+			eval "${DIALOG}   --clear --msgbox 'File ${FILEIN} saved successfully' \
+				   ${INFO_HEIGHT} ${INFO_WIDTH}"
+		else
+			eval "${DIALOG}   --clear --msgbox 'Error saving file ${FILEIN}' \
+				   ${INFO_HEIGHT} ${INFO_WIDTH}"
+		fi
+	else
+		log "edit_file" "Editing of ${FILEIN} aborted..."xs
+		eval "${DIALOG}   --clear --msgbox 'File ${FILEIN} not saved' \
+			   ${INFO_HEIGHT} ${INFO_WIDTH}"
+	fi
+}
+
+
+
+
+##
+## Read all the configured addresses for a given inet family
+##
+function get_addr_family(){
+	
+	local DEVNAME=$1
+	local DEVFAMILY=$2
+
+	NUMADDR=`ip -f ${DEVFAMILY} addr show ${DEVNAME} | grep ${DEVFAMILY} | wc -l`
+	ADDR_STR=""
+	for i in `seq ${NUMADDR}`; do 
+		ADDR=`ip -f ${DEVFAMILY} addr show ${DEVNAME} | grep ${DEVFAMILY} | \
+			tail -n +$i | head -1 | sed -r -e "s:^\ +::g" | cut -d " " -f 2,4,6 |\
+			sed -r -e "s:\ : -- :g"`
+		ADDR_STR="${ADDR_STR}\n${DEVFAMILY}: ${ADDR}\n"
+	done
+}
+
+##
+## Show the current configuration of a given device
+##
+
+function show_device_conf(){
+
+	local DEVNAME=$1
+	if [ ${DEVNAME} == "" ]; then
+		return -1
+	fi
+
+	DEVMAC=`ip link show ${DEVNAME} | tail -n +2 | sed -r 's/^\ +//g' | cut -d " " -f 2`
+	DEVCONF="MAC: ${DEVMAC}\n"
+
+	log "_self" "NET_FAMILIES: \"${NET_FAMILIES}\""
+	
+	for f in ${NET_FAMILIES}; do
+		get_addr_family ${DEVNAME} ${f}
+		log "_self" "family: ${f} ADDR_STR: \"${ADDR_STR}\""
+		
+		if [ -z "${ADDR_STR}" ]; then 
+			DEVCONF="${DEVCONF}${f}: Unconfigured\n"
+		else
+			DEVCONF="${DEVCONF}${ADDR_STR}"
+		fi
+		log "_self" "DEVCONF: ${DEVCONF}"
+	done
+
+	DEVCONF="${DEVCONF}\n== name servers ==\n`cat /etc/resolv.conf | grep '^nameserver'`"
+	
+	eval "${DIALOG}   --clear --title 'Current configuration of device: ${DEVNAME}' \
+		--msgbox '\n\n${DEVCONF}' ${WINDOW_HEIGHT} ${WINDOW_WIDTH} "
+	return 0
+
+}
+
+
+
+function config_ethernet_static(){
+
+	local DEV_IP="192.168.1.2"
+	local DEV_NET="192.168.1.0"
+	local DEV_NETMASK="255.255.255.0"
+	local DEV_GW="192.168.1.1"
+	local DEV_DNS1="208.67.222.222"
+	local DEV_DNS2="208.67.220.220"
+
+	local DEVNAME=$1
+
+	exec 3>&1	
+	eval "${DIALOG}  --clear --form 'Set network for device: ${DEVNAME}'" \
+	${FORM_HEIGHT} ${FORM_WIDTH} 0 \
+	"IP"            1 1 "${DEV_IP}"    1 16 16 16 \
+	"Network"       2 1 "${DEV_NET}"    2 16 16 16 \
+	"Netmask"       3 1 "${DEV_NETMASK}"  3 16 16 16 \
+	"Gateway"       4 1 "${DEV_GW}"    4 16 16 16 \
+	"Primary DNS"   5 1 "${DEV_DNS1}" 5 16 16 16 \
+	"Secondary DNS" 6 1 "${DEV_DNS2}" 6 16 16 16 2> ${TMPFILE}
+
+	if [ $? -eq 1 ]; then 
+		eval "${DIALOG}  --infobox 'Configuration of ${DEVNAME} aborted' \
+		${INFO_HEIGHT} ${INFO_WIDTH}"
+		return
+	fi
+
+	read -d "*" DEV_IP DEV_NET DEV_NETMASK DEV_GW DEV_DNS1  DEV_DNS2 < ${TMPFILE}
+	eval "${DIALOG}  --msgbox 'Proposed configuration of ${DEVNAME}:\n ${DEV_IP}\n${DEV_NET}\n${DEV_NETMASK}\n${DEV_GW}\n${DEV_DNS1}\n${DEV_DNS2}'\
+		${WINDOW_HEIGHT} ${WINDOW_WIDTH}"
+	
+	## Configure IP
+	
+	ip link set ${DEVNAME} down
+	ip link set ${DEVNAME} up
+	ip address flush dev ${DEVNAME}
+	ip address add ${DEV_IP}/${DEV_NETMASK} dev ${DEVNAME}
+	
+	## Configure GW
+	ip route flush dev ${DEVNAME}
+	ip route add ${DEV_NET}/${DEV_NETMASK} dev ${DEVNAME}
+	ip route add default via ${DEV_GW}
+	
+	## Configure DNS
+	mv /etc/resolv.conf /etc/resolv.conf.bak
+	if [ -n ${DEV_DNS1} ]; then
+		echo "nameserver ${DEV_DNS1}" >> /etc/resolv.conf
+	fi
+	if [ -n ${DEV_DNS2} ]; then
+		echo "nameserver ${DEV_DNS2}" >> /etc/resolv.conf
+	fi
+	show_device_conf ${DEVNAME}
+}
+
+function config_ethernet_dhcp(){
+
+	local DEVNAME=$1
+
+	eval "${DIALOG}  --infobox 'Running \"dhclient ${DEVNAME}\"' ${INFO_HEIGHT} ${INFO_WIDTH}"
+	dhclient -r ${DEVNAME}
+	dhclient ${DEVNAME}
+	show_device_conf ${DEVNAME}
+}
+
+
+function config_ethernet(){
+
+	local DEVNAME=$1
+	
+	while [ 1 -eq 1 ]; do
+		eval "${DIALOG}  --clear --cancel-label 'Up' \
+		--menu 'Configuring ${DEVNAME}' ${INFO_HEIGHT} ${INFO_WIDTH} 4 \
+		'DHCP' ''\
+		'Static' '' 2>${TMPFILE}"
+		if [ $? -eq 1 ]; then
+			return
+		fi
+		ACTION=`<${TMPFILE}`
+		case ${ACTION} in
+			"Static")
+				config_ethernet_static ${DEVNAME}
+				;;
+			"DHCP")
+				config_ethernet_dhcp ${DEVNAME}
+				;;
+		esac
+	done
+
+}
+
+function wifi_essid_from_mac(){
+
+	local DEVNAME=$1
+	local W_MAC=$2
+	
+	W_ESSID=`wpa_cli -i ${DEVNAME} scan_results | grep -E "^${W_MAC}" | \
+       sed -r -e 's/\t/\|/g' | cut -d "|" -f 5`
+
+	log "${FUNCNAME[0]}" "Recovered ESSID: ${W_ESSID}"
+}
+
+function wifi_flags_from_mac(){
+	local DEVNAME=$1
+	local W_MAC=$2
+
+	W_FLAGS=`wpa_cli -i ${DEVNAME} scan_results | grep -E "^${W_MAC}" | \
+       sed -r -e 's/\t/\|/g' | cut -d "|" -f 4`
+	log "wifi_essid_from_mac" "Recovered W_FLAGS: ${W_FLAGS}"
+
+}
+
+
+function wifi_network_list(){
+
+	local DEVNAME=$1
+	wpa_cli -i ${DEVNAME} list_networks | tail -n +2 | sed -r -e 's/\t/\|/g' > ${TMPFILE}
+
+	NETLIST=""
+	LAST_IFS=$IFS
+	IFS="|"
+	while read NETNUM NETESSID NETBSSID NETFLAGS; do
+		IS_DIS=`echo ${NETFLAGS} | sed -r -e 's/\[//g;s/\]//g' | grep -i disabled | wc -l`
+		if [ ${IS_DIS} -eq 1 ]; then
+		   STATUS="(DIS)"
+		else
+		   STATUS="(ENAB)"
+		fi
+		IS_CUR=`echo ${NETFLAGS} | sed -r -e 's/\[//g;s/\]//g' | grep -i current | wc -l`
+		if [ ${IS_CUR} -eq 1 ]; then
+			STATUS="${STATUS}(CUR)"
+		fi
+
+		
+		NETLIST="${NETLIST} ${NETNUM} \"${NETESSID}-${STATUS}\""
+	done < ${TMPFILE}
+	IFS=${LAST_IFS}
+
+	log "_self" "NETLIST: ${NETLIST}"
+}
+
+
+##
+## Manage the authentication for a given wifi ESSID
+##
+function wifi_authenticate(){
+	
+	local DEVNAME=$1
+	local W_MAC=$2
+
+
+	log "${FUNCNAME[0]}" "configuring ${DEVNAME} on ${W_MAC}"
+	## This will set the variable W_ESSID appropriately
+	wifi_essid_from_mac ${DEVNAME} ${W_MAC}
+	
+	## This will set the variable W_FLAGS appropriately
+	wifi_flags_from_mac ${DEVNAME} ${W_MAC}
+
+	
+	log "${FUNCNAME[0]}" "configuring essid: ${W_ESSID} on device: ${DEVNAME}"
+	log "${FUNCNAME[0]}" "W_FLAGS: ${W_FLAGS}"
+
+	
+	NET_EXISTS=`wpa_cli -i ${DEVNAME} list_networks | tail -n +2 | sed -r -e 's/\t/\|/g' \
+      | cut -d "|" -f 2 | grep "${W_ESSID}$" | wc -l`
+	if [ ${NET_EXISTS} -ne 0 ]; then
+		NET_NUM=`wpa_cli -i ${DEVNAME} list_networks | tail -n +2 | sed -r -e 's/\t/\|/g' \
+      | cut -d "|" -f 1,2 | grep "${W_ESSID}$" | cut -d "|" -f 1`
+		wpa_cli -i ${DEVNAME} remove_network ${NET_NUM} > ${TMPFILE}
+		STATUS=`<${TMPFILE}`
+		if [ ${STATUS} != "OK" ]; then
+			eval "${DIALOG}  --msgbox 'Error while removing existing network:\n$essid: {W_ESSID}'"
+			${INFO_HEIGHT} ${INFO_WIDTH}
+			return
+		fi
+	fi
+
+	HAS_WPA=`echo "${W_FLAGS}" | grep -E "WPA.*-PSK" | wc -l`
+
+	log "${FUNCNAME[0]}" "HAS_WPA: \"${HAS_WPA}\"" 
+	
+	### This section will configure WPA-PSK or WPA2-PSK
+	if [ ${HAS_WPA} != "0" ]; then
+		PSK=""
+		PSK_LENGTH=${#PSK}
+		while [ ${PSK_LENGTH} -le 7 ]; do
+			eval "${DIALOG}  --insecure --inputbox 'Please insert WPA PSK\n(8 characters)' \
+				   ${INFO_HEIGHT} ${INFO_WIDTH} 2> ${TMPFILE}"
+			if [ $? -eq 1 ]; then
+				eval "${DIALOG}  --clear --msgbox 'Network configuration aborted!!!' \
+					   ${INFO_HEIGHT} ${INFO_WIDTH}"
+				return 1
+			fi
+			PSK=`<${TMPFILE}`
+			PSK_LENGTH=${#PSK}
+		done
+			
+		
+		NET_NUM=`wpa_cli -i ${DEVNAME} add_network | tail -1`
+
+		log "${FUNCNAME[0]}" `wpa_cli -i ${DEVNAME} set_network ${NET_NUM} ssid "\"${W_ESSID}\""`
+		log "${FUNCNAME[0]}" `wpa_cli -i ${DEVNAME} set_network ${NET_NUM} psk \"${PSK}\"`
+		## remove the password from tmpfile
+		echo "" > ${TMPFILE}
+		eval "${DIALOG}  --clear --defaultno --yesno \
+			   'Network \"${W_ESSID}\" added\nSave configuration file?' \
+			   ${INFO_HEIGHT} ${INFO_WIDTH} 2> ${TMPFILE}"
+		if [ $? -eq 0 ]; then
+			## Save the config file
+			wifi_save_file ${DEVNAME}
+		fi
+		
+		eval "${DIALOG}  --msgbox 'Network added successfully' ${INFO_HEIGHT} ${INFO_WIDTH}"
+		return 0
+	fi
+	
+	HAS_ESS=`echo "${W_FLAGS}" | grep -E "ESS" | wc -l`
+
+	log "_self" "HAS_ESS: \"${HAS_ESS}\""
+	
+	if [ ${HAS_ESS} != "0" ]; then
+		NET_NUM=`wpa_cli -i ${DEVNAME} add_network | tail -1`
+
+		log "_self" "NET_NUM: ${NET_NUM}"
+		log "_self" `wpa_cli -i ${DEVNAME} set_network ${NET_NUM} ssid "\"${W_ESSID}\""`
+		log "_self" `wpa_cli -i ${DEVNAME} set_network ${NET_NUM} key_mgmt NONE`
+		eval "${DIALOG}  --clear --defaultno --yesno \
+			   'Network \"${W_ESSID}\" added\nSave configuration file?' \
+			   ${INFO_HEIGHT} ${INFO_WIDTH} 2> ${TMPFILE}"
+		if [ $? -eq 0 ]; then
+			## Save the config file
+			wifi_save_file ${DEVNAME}
+		fi
+		
+		return 0
+	else
+		eval " ${DIALOG}  --msgbox 'Error occurred!!!!' ${INFO_HEIGHT} ${INFO_WIDTH}"
+		return 0
+	fi
+	
+	## No available authentication methods....
+
+	eval "${DIALOG}  --msgbox 'No supported authentication method for ${W_ESSID}'"
+	return 1
+}
+
+
+
+
+##
+## Configure a new connection from a list of available wi-fi networks
+##
+
+function wifi_add(){
+
+	local DEVNAME=$1
+	
+	wpa_cli -i ${DEVNAME} scan
+	eval "${DIALOG}  --timeout 4 --msgbox 'Scanning for networks...' \
+		   ${INFO_HEIGHT} ${INFO_WIDTH}"
+	wpa_cli -i ${DEVNAME} scan_results | grep -E "^[0-9a-f][0-9a-f]:" | \
+		sed -r -e 's/\t/|/g' |\
+		sort -t "|" -r -n -k 3 > ${TMPFILE}
+
+	wifinets=()
+	LAST_IFS=$IFS
+	IFS="|"
+	while read W_MAC W_FREQ W_STRNGT W_FLAGS W_ESSID; do
+
+		log "_self" "W_ESSID: \"${W_ESSID}\""
+		wifinets+=(${W_MAC} "${W_ESSID} -- ${W_FLAGS}")
+	done < ${TMPFILE}
+	IFS=${LAST_IFS}
+	
+
+	log "$_self" "Wifi nets: \n${wifinets}\n==="
+	dialog  --menu 'Select a network' ${WINDOW_HEIGHT} ${WINDOW_WIDTH} 10 \
+		   "${wifinets[@]}" 2> ${TMPFILE}
+	if [ $? -eq 1 ]; then
+		return
+	fi
+
+	W_MAC=$(cat ${TMPFILE})
+	
+
+	wifi_authenticate ${DEVNAME} ${W_MAC}
+	if [ $? -ne 0 ]; then
+		eval "${DIALOG}  --msgbox 'Error while configuring ${DEVNAME}' "
+	fi
+	return $?
+}
+
+
+function wifi_save_file(){
+
+	local DEVNAME=$1
+	
+	wpa_cli -i ${DEVNAME} save_config | tail -1 > ${TMPFILE}
+	SAVE_STATUS=`<${TMPFILE}`
+	if [ ${SAVE_STATUS} == "OK" ]; then
+		eval "${DIALOG}  --msgbox 'Current configuration dumped to file ${WPA_FILE}' \
+			   ${INFO_HEIGHT} ${INFO_WIDTH}"
+	else
+		eval "${DIALOG}  --msgbox 'Error while saving configuration to file ${WPA_FILE}' \
+			   ${INFO_HEIGHT} ${INFO_WIDTH}"
+	fi
+}
+
+function wifi_remove(){
+
+	local DEVNAME=$1
+
+	wifi_network_list ${DEVNAME}
+
+	eval "${DIALOG} --menu 'Select network to remove' \
+           ${WINDOW_HEIGHT} ${WINDOW_WIDTH} 10 ${NETLIST} \
+		   2> ${TMPFILE}"
+	
+	if [ $? -eq 0 ]; then
+		## a network has been selected
+		NETNUM=`<${TMPFILE}`
+		WPA_STATUS=`wpa_cli -i ${DEVNAME} remove_network ${NETNUM} | tail -1 `
+		if [ ${WPA_STATUS} == "OK" ]; then
+			eval "${DIALOG}  --clear --defaultno --yesno \
+				   'Network ${NETNUM} removed\nSave configuration file?' \
+				   ${INFO_HEIGHT} ${INFO_WIDTH} 2> ${TMPFILE}"
+			if [ $? -eq 0 ]; then
+				## Save the config file
+				wifi_save_file ${DEVNAME}
+			fi
+			
+			return
+		else
+			eval "${DIALOG}  --clear --msgbox 'Network ${NETNUM} NOT removed' \
+				   ${INFO_HEIGHT} ${INFO_WIDTH}"
+			return
+		fi
+	else
+		eval "${DIALOG}  --clear --msgbox 'No network removed!!!' \
+			   ${INFO_HEIGHT} ${INFO_WIDTH}"
+		return
+	fi
+	
+}
+
+
+function wifi_restart_wpa(){
+
+	local DEVNAME=$1
+	local WPA_FILE=$2
+	
+	WPA_PID=`ps ax | grep wpa_supplicant | grep " -i ${DEVNAME}" | 
+sed -r -e 's/^\ +//g' | cut -d " " -f 1`
+
+	log "${FUNCNAME[0]}" "WPA_PID: ${WPA_PID}"
+	kill -n 9 ${WPA_PID}
+	
+	if [ $? -ne 0 ]; then
+	   eval "${DIALOG}  --clear --msgbox 'Error killing wpa_supplicant' \
+			  ${INFO_HEIGHT} ${INFO_WIDTH}"
+	fi
+
+	wpa_supplicant -B -i ${DEVNAME} -c ${WPA_FILE} -P${WPA_PIDFILE}
+	WPA_PID=`ps ax | grep wpa_supplicant | grep " -i ${DEVNAME}" | cut -d " " -f 1 `
+	WPA_PID_SAVED=`<${WPA_PIDFILE}`
+	if [ [ -n ${WPA_PID} ] || [ ${WPA_PID} != ${WPA_PID_SAVED} ] ]; then
+		eval "${DIALOG}  --clear --msgbox 'Error restarting wpa_supplicant' \
+			   ${INFO_HEIGHT} ${INFO_WIDTH}"
+	else
+		eval "${DIALOG}  --clear --msgbox 'wpa_supplicant restarted successfully' \
+			   ${INFO_HEIGHT} ${INFO_WIDTH}"
+	fi
+
+}
+
+
+
+##
+## wifi_enable: show the list of configured networks, and enable the
+## one the used has clicked on
+##
+
+function wifi_enable(){
+
+	local DEVNAME=$1
+
+	wifi_network_list ${DEVNAME}
+
+	eval "${DIALOG} --menu 'Select configured network' \
+		   ${WINDOW_HEIGHT} ${WINDOW_WIDTH} 10 ${NETLIST} \
+		   2> ${TMPFILE}"
+	
+	if [ $? -eq 0 ]; then
+		## a network has been selected
+		NETNUM=`<${TMPFILE}`
+		WPA_STATUS=`wpa_cli -i ${DEVNAME} enable ${NETNUM} | tail -1 `
+		if [ ${WPA_STATUS} == "OK" ]; then
+			eval "${DIALOG}  --clear --msgbox 'Network ${NETNUM} enabled' \
+				   ${INFO_HEIGHT} ${INFO_WIDTH}"
+			config_ethernet ${DEVNAME}
+			return
+		else
+			eval "${DIALOG}  --clear --msgbox 'Network ${NETNUM} NOT enabled' \
+				   ${INFO_HEIGHT} ${INFO_WIDTH}"
+			return
+		fi
+	else
+		eval "${DIALOG}  --clear --msgbox 'No network enabled!!!' \
+			   ${INFO_HEIGHT} ${INFO_WIDTH}"
+		return
+	fi
+}
+
+
+function wifi_disable(){
+
+	local DEVNAME=$1
+	wifi_network_list ${DEVNAME}
+	eval "${DIALOG}  --menu 'Select configured network' \
+          ${WINDOW_HEIGHT} ${WINDOW_WIDTH} 10 ${NETLIST} \
+		   2> ${TMPFILE}"
+	
+	if [ $? -eq 0 ]; then
+		## a network has been selected
+		NETNUM=`<${TMPFILE}`
+		WPA_STATUS=`wpa_cli -i ${DEVNAME} disable ${NETNUM} | tail -1 `
+		if [ ${WPA_STATUS} == "OK" ]; then
+			eval "${DIALOG}  --clear --msgbox 'Network ${NETNUM} disabled' \
+				   ${INFO_HEIGHT} ${INFO_WIDTH}"
+			return
+		else
+			eval "${DIALOG}  --clear --msgbox 'Network ${NETNUM} NOT disabled' \
+				   ${INFO_HEIGHT} ${INFO_WIDTH}"
+			return
+		fi
+	else
+		eval "${DIALOG}  --clear --msgbox 'No network disabled!!!' \
+			   ${INFO_HEIGHT} ${INFO_WIDTH}"
+		return
+	fi
+}
+
+
+
+function wifi_load_file(){
+	
+	local DEVNAME=$1
+	
+	eval "${DIALOG}  --fselect ${WPA_FILE} ${WINDOW_HEIGHT} ${WINDOW_WIDTH} \
+			   2>${TMPFILE}|"
+	
+	if [ $? -eq 0 ]; then
+		SEL_FILE=`<${TMPFILE}`
+		while [ -d ${SEL_FILE} ]; do
+			eval "${DIALOG}  --fselect ${SEL_FILE} ${WINDOW_HEIGHT} ${WINDOW_WIDTH} \
+					   2>${TMPFILE}"
+			if [ $? -eq 0 ]; then
+				SEL_FILE=`<${TMPFILE}`
+			else
+				eval "${DIALOG}  --clear --infobox 'WPA_FILE was not modified' \
+						   ${INFO_HEIGHT} ${INFO_WIDTH}"
+				return
+			fi
+		done
+		
+		if [ -f ${SEL_FILE} ]; then
+			WPA_FILE=${SEL_FILE}
+			eval "${DIALOG}  --clear --defaultno --yesno \
+					   'WPA_FILE changed to ${WPA_FILE}\nRestart wpa_supplicant?' \
+					   ${INFO_HEIGHT} ${INFO_WIDTH}"
+			if [ $? -eq 0 ]; then
+				wifi_restart_wpa ${DEVNAME} ${WPA_FILE}
+			fi
+		else
+			eval "${DIALOG}  --clear --infobox 'Invalid file name!\n WPA_FILE *not* changed' \
+					  ${WINDOW_HEIGHT} ${WINDOW_WIDTH}"
+			return 
+		fi
+	else
+		eval "${DIALOG}  --clear --infobox 'WPA_FILE was not modified' \
+				   ${INFO_HEIGHT} ${INFO_WIDTH}"
+	fi
+	
+}
+
+
+ 
+function config_wifi(){
+
+	local DEVNAME=$1
+	
+	while [ 1 -eq 1 ]; do
+		eval "${DIALOG}  --clear --cancel-label 'Up' \
+			   --menu 'Configuring ${DEVNAME}\n(Current file: ${WPA_FILE})' \
+			   ${WINDOW_HEIGHT} ${WINDOW_WIDTH} 12 \
+			   'Restart' 'Restart wpa_supplicant' \
+			   'Enable' 'Enable a configured network' \
+			   'Disable' 'Disable a configured network' \
+			   'Add' 'Configure a new network' \
+			   'Remove' 'Delete an existing network' \
+			   'Show' 'Show current configuration file' \
+			   'Edit' 'Edit current configuration file' \
+			   'Save' 'Save configuration to file'\
+			   'Load' 'Load configuration from file'\
+			   'New' 'Create new configuration file'\
+		2>${TMPFILE}"
+		if [ $? -eq 1 ]; then
+			return
+		fi
+		ACTION=`<${TMPFILE}`
+		case ${ACTION} in
+			"Restart")
+				## Restart wpa_supplicant
+				wifi_restart_wpa ${DEVNAME} ${WPA_FILE}
+				;;
+			"Enable")
+				wifi_enable ${DEVNAME}
+				;;
+			"Disable")
+				wifi_disable ${DEVNAME}
+				;;
+			"Add")
+				wifi_add ${DEVNAME}
+				;;
+			"Remove")
+				wifi_remove ${DEVNAME}
+				;;
+			"Show")
+				eval "${DIALOG}  --title 'Current file: ${WPA_FILE}' \
+					   --textbox ${WPA_FILE} ${WINDOW_HEIGHT} ${WINDOW_WIDTH}"
+				;;
+			"Edit")
+				edit_file ${WPA_FILE}
+				;;
+			"Save")
+				wifi_save_file ${DEVNAME}
+				;;
+			"Load")
+				wifi_load_file ${DEVNAME}
+				;;
+			"New")
+				eval "${DIALOG}  --msgbox 'Sorry!Not yet implemented!' \
+						  ${INFO_HEIGHT} ${INFO_WIDTH} 2>${TMPFILE}"
+				;;
+		esac
+	done
+
+}
+
+
+
+##
+## (Re)-Configure a network device
+##
+
+function configure_device(){
+
+	local DEVNAME=$1
+	
+	case ${DEVNAME} in
+		eth*)
+			config_ethernet ${DEVNAME}
+			;;
+		wlan*)
+			config_wifi ${DEVNAME}
+			;;
+		*)
+			eval "${DIALOG}  --clear --title 'ERROR' --msgbox \
+			'${DEVNAME}: Unsupported device type' \
+			${WINDOW_HEIGHT} ${WINDOW_WIDTH}"
+			;;
+	esac
+
+
+}
+
+
+function set_device_up(){
+
+	local DEVNAME=$1
+	
+	ip link set ${DEVNAME} up 
+
+}
+
+function set_device_down(){
+
+	local DEVNAME=$1
+	
+	ip link set ${DEVNAME} down
+
+}
+
+function show_device_menu(){
+	
+	local DEVNAME=$1
+	while [ 1 -eq 1 ]; do 	
+		eval "${DIALOG}  --clear --cancel-label 'Up' --menu 'Device: ${DEVNAME}' \
+			   ${WINDOW_HEIGHT} ${WINDOW_WIDTH} 8 \
+			   'View' 'View current configuration' \
+			   'Conf' 'Configure device' \
+		       'Start' 'Bring interface up' \
+			   'Stop' 'Put interface down' \
+			   'Restart' 'Restart interface' 2> ${TMPFILE}"
+		
+		if [ $? -eq 1 ]; then
+			return
+		fi
+		
+		DEV_ACTION=`<${TMPFILE}`
+		case ${DEV_ACTION} in
+			"View")
+				show_device_conf ${DEVNAME}
+				;;
+			"Conf")
+				configure_device ${DEVNAME}
+				;;
+			"Start")
+				set_device_up ${DEVNAME}
+				;;
+			"Stop") 
+				set_device_down ${DEVNAME}
+				;;
+			"Restart")
+				set_device_down ${DEVNAME}
+				set_device_up ${DEVNAME}
+				;;	
+			*)
+				;;
+	
+		esac
+	done 	
+}
+
+##
+## Show all the available network devices
+##
+
+function show_devs() {
+
+	DEVFILE=/proc/net/dev
+  	DEVICES=`ip link show | awk 'NR % 2 == 1' | cut -d ":" -f 2`
+
+	DEVICE_TAGS=""
+
+	for i in `echo $DEVICES`; do
+		if [ $i != "lo" ]; then
+			DEVICE_TAGS="${DEVICE_TAGS} $i $i" 
+		fi
+	done
+
+ 	eval "${DIALOG}  --clear --cancel-label 'Up' \
+			   --menu 'Select Interface to configure' ${WINDOW_HEIGHT} ${WINDOW_WIDTH} 4 \
+			   ${DEVICE_TAGS} 2> ${TMPFILE}"
+	return $?
+}
+
+
+function dev_config_menu(){
+
+	while [ 1 -eq 1 ]; do 
+		show_devs 
+		if [ $? -eq 1 ]; then
+			return
+		fi
+		DEVNAME=`<${TMPFILE}`
+		show_device_menu ${DEVNAME}			
+	done
+}
+
+function show_info(){
+
+	cat <<EOF > ${TMPFILE}
+
+== setnet.sh 0.1 ==
+
+setnet.sh is a simple state-less tool to manage and configure network
+interfaces. It is a shell wrapper around the functionalities of "ip",
+"dhclient", "wpa_cli", and can be used to configure network
+connections via Ethernet/Wi-Fi interfaces.
+
+Both Static and DHCP-based IP configuration is supported. 
+
+At the moment, only WPA-PSK and open (no key) Wi-Fi connections are
+available. 
+
+EOF
+	eval "${DIALOG}  --clear --cr-wrap --textbox ${TMPFILE} ${WINDOW_HEIGHT} ${WINDOW_WIDTH}"
+	return
+}
+
+function show_copyright(){
+
+	cat <<EOF > ${TMPFILE}
+
+== setnet.sh 0.1 ==
+
+(c) KatolaZ (katolaz@freaknet.org) -- 2016
+
+EOF
+	eval "${DIALOG}  --clear --cr-wrap --textbox ${TMPFILE} ${WINDOW_HEIGHT} ${WINDOW_WIDTH}"
+	return
+}
+
+
+function show_license(){
+
+	cat <<EOF > ${TMPFILE}
+
+== setnet.sh 0.1 ==
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+----------------------------------------------------------------------
+
+ (c) KatolaZ <katolaz@freaknet.org> -- 2016
+
+----------------------------------------------------------------------
+
+EOF
+	eval "${DIALOG}  --clear --cr-wrap --textbox ${TMPFILE} ${WINDOW_HEIGHT} ${WINDOW_WIDTH}"
+	return
+}
+
+
+
+function about_menu(){
+
+	while [ 1 -eq 1 ]; do 
+		eval "${DIALOG}  --cancel-label 'Up' --menu 'setnet ${VERSION} -- About' \
+			   ${WINDOW_HEIGHT} ${WINDOW_WIDTH} 6 \
+			   'Info' 'General information' \
+			   'Copyright' 'Copyright information' \
+			   'License' 'How to distribute this program' \
+			   2> ${TMPFILE}"
+		if [ $? -eq 1 ];then
+			return;
+		fi
+		
+		ACTION=`<${TMPFILE}`
+		case ${ACTION} in
+			"Info")
+				show_info
+				;;
+			"Copyright")
+				show_copyright
+				;;
+			"License")
+				show_license
+				;;
+		esac
+	done
+}
+
+
+function show_toplevel(){
+	
+	eval "${DIALOG} --clear --cancel-label 'Quit' --menu 'Main Menu' \
+		   ${WINDOW_HEIGHT} ${WINDOW_WIDTH} 6 \
+		   'Setup' 'Setup interfaces' \
+		   'About' 'Info & Copyright' 2> ${TMPFILE}"
+	return $?
+}
+
+function show_help(){
+
+	local SCRIPTNAME=$1
+	echo "Usage: ${SCRIPTNAME} [OPTION]"
+	echo "Options:"
+	echo -e "\t -c cfg_file\tLoad configuration from cfg_file."
+	echo -e "\t -v\t\tPrint version number and exit. "
+	echo -e "\t -h\t\tShow this help."
+	
+}
+
+function show_version(){
+
+	local SCRIPTNAME=$1
+	echo "${SCRIPTNAME} -- version ${VERSION}"
+	echo "Copyright (C) Vincenzo \"KatolaZ\" Nicosia (katolaz@freaknet.org) -- 2016"
+	echo "This is free software. You can use and redistribute it under the "
+	echo "terms of the GNU General Public Licence version 3 or (at your option)"
+	echo "any later version."
+	echo 
+	echo "YOU USE THIS SOFTWARE AT YOUR OWN RISK."
+	echo "There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or"
+	echo "FITNESS FOR A PARTICULAR PURPOSE."
+}
+
+function show_disclaimer(){
+
+	cat <<EOF > ${TMPFILE}
+
+                == setnet.sh 0.1 ==
+
+      (c) KatolaZ (katolaz@freaknet.org) -- 2016
+
+    -+- This is the alpha release of setnet.sh -+-
+   
+                 THIS IS FREE SOFTWARE
+        YOU CAN USE AND DISTRIBUTE IT UNDER THE 
+        TERMS OF THE GNU GENERAL PUBLIC LICENSE
+      
+          USE THIS SOFTWARE  AT YOUR OWN RISK
+
+     There is ABSOLUTELY NO WARRANTY; not even for 
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
+
+        See "About" for more information about 
+                 copyright and license
+EOF
+
+	eval "${DIALOG}  --clear --cr-wrap --textbox ${TMPFILE} 23 60"
+	return
+}
+
+
+function main(){
+
+	truncate -s 0 ${LOGFILE}
+	trap cleanup 0 $SIG_NONE $SIG_HUP $SIG_INT $SIG_TRAP $SIG_TERM
+
+	show_disclaimer
+	
+	log "setnet" "Starting afresh on `date`"
+	SETNETRC=`realpath ${SETNETRC}`
+	log "main" "Using config file \"${SETNETRC}\""
+	WPA_FILE=`realpath ${WPA_FILE}`
+	log "main" "Using WPA config file \"${WPA_FILE}\""
+	LOFGILE=`realpath ${LOGFILE}`
+	log "main" "Using log file \"${LOGFILE}\""
+	
+	while [ 1 -eq 1 ]; do 
+		show_toplevel
+		if [ $? -eq 1 ]; then
+			cleanup
+			exit 1
+		fi
+		ACTION=`<${TMPFILE}`
+		case ${ACTION} in
+			"Setup")
+				dev_config_menu
+				;;
+			"About")
+				about_menu
+				;;
+		esac
+	done
+
+}
+
+
+##
+## Get the options
+## 
+
+SETNETRC=""
+
+while getopts ":c:hv" opt; do
+	
+	case $opt in
+		c)
+			echo "Got option -c ${OPTARG}"
+			SETNETRC=`realpath ${OPTARG}`
+			echo "SETNETRC: ${SETNETRC}"
+			;;
+		h)
+			show_help `basename $0`
+			exit 1
+			;;
+		v)
+			show_version `basename $0`
+			exit 1
+			;;
+		\?)
+			echo "Invalid option: -${OPTARG}"
+			exit 1
+			;;
+		:)
+			echo "Option -${OPTARG} requires an argument"
+			exit 1
+			;;
+	esac
+done
+
+
+
+load_setnetrc ${SETNETRC}
+
+main 
+
+
diff --git a/setnetrc b/setnetrc
new file mode 100644
index 0000000..e5ccf82
--- /dev/null
+++ b/setnetrc
@@ -0,0 +1,19 @@
+##
+##
+## setnetrc -- configuration file for setnet
+##
+##
+
+##
+## The default configuration file for wpa_supplicant
+##
+WPA_FILE=./wpa_supplicant.conf
+
+
+##
+## Logfile
+##
+LOGFILE=./setnet_log
+
+
+