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authorJouke Witteveen <j.witteveen@gmail.com>2012-02-22 15:41:44 +0100
committerJouke Witteveen <j.witteveen@gmail.com>2012-02-22 15:41:44 +0100
commit10a01a13d3e849e576dadd5ca39be67c632f9f3a (patch)
treea759f6a42e9e161ca8135f085888d90d3ac4fb2b /scripts/wifi-menu
parent439f5f82a86db89c7b6eab5d98fe48f75d70d475 (diff)
downloadnetctl-10a01a13d3e849e576dadd5ca39be67c632f9f3a.tar.gz
netctl-10a01a13d3e849e576dadd5ca39be67c632f9f3a.tar.xz
Add wireless connection aid
wifi-menu is a tool that lets you connect to a wireless network from the console. It is aware of your netcfg profiles and can write them for you.
Diffstat (limited to 'scripts/wifi-menu')
-rwxr-xr-xscripts/wifi-menu260
1 files changed, 260 insertions, 0 deletions
diff --git a/scripts/wifi-menu b/scripts/wifi-menu
new file mode 100755
index 0000000..fc21a9b
--- /dev/null
+++ b/scripts/wifi-menu
@@ -0,0 +1,260 @@
+#! /bin/bash
+
+. /usr/lib/network/network
+. $SUBR_DIR/8021x
+. /etc/conf.d/netcfg
+
+# The right value depends on the connected profile.
+WPA_CTRL_PATH=/run/wpa_supplicant
+
+usage()
+{
+ cat << END
+Usage: wifi-menu [-o | --obscure] [-h | --help] [interface]
+
+Interactively connect to a wireless network.
+
+Arguments:
+ -o, --obscure Show asterisks for the characters of the password
+ and store the password as a hexadecimal string.
+ -h, --help Show this help.
+ interface The wireless interface to use.
+ (default: WIRELESS_INTERFACE from /etc/conf.d/netcfg)
+
+For choosing from all available profiles, use netcfg-menu.
+END
+}
+
+# Fills PROFILES and ESSIDS with the profile names and essids of the profiles
+# for interface $1.
+init_profiles()
+{
+ local i=0 essid profile
+ for profile in $(list_profiles); do
+ essid=$(
+ unset INTERFACE ESSID
+ . "$PROFILE_DIR/$profile" &> /dev/null
+ if [[ "$INTERFACE" = "$1" && -n "$ESSID" ]]; then
+ printf "%s" "$ESSID"
+ if [[ "$DESCRIPTION" =~ "Automatically generated" ]]; then
+ return 2
+ else
+ return 1
+ fi
+ fi
+ return 0
+ )
+ case $? in
+ 2)
+ GENERATED[${#GENERATED[@]}]="$profile"
+ ;&
+ 1)
+ PROFILES[$i]="$profile"
+ ESSIDS[$i]="$essid"
+ let i++
+ ;;
+ esac
+ done
+}
+
+# Builds ENTRIES as an argument list for dialog based on scan results in $1.
+init_entries()
+{
+ local i=0 flags security signal ssid
+ while IFS=$'\t' read signal flags ssid; do
+ ENTRIES[$i]="--" # $ssid might look like an option to dialog.
+ let i++
+ ENTRIES[$i]="$ssid"
+ let i++
+ if inarray "$ssid" "${ESSIDS[@]}"; then
+ if inarray "$(ssid_to_profile "$ssid")" "${GENERATED[@]}"; then
+ ENTRIES[$i]="+" # Automatically generated
+ else
+ ENTRIES[$i]="*" # Handmade
+ fi
+ else
+ ENTRIES[$i]="-" # Not present
+ fi
+ if [[ "$ssid" = "$CONNECTION" ]]; then
+ ENTRIES[$i]="!" # Currently connected
+ fi
+ security="$(expr match "$flags" ".*\(WPA2\|WPA\|WEP\)")"
+ : ${security:="NONE"}
+ ENTRIES[$i]+=":${security,,}"
+ ENTRIES[$i]+=" :$signal"
+ let i++
+ done < "$1"
+}
+
+# Finds a profile name for ssid $1.
+ssid_to_profile()
+{
+ local i
+ for i in $(seq 0 $((${#ESSIDS[@]}-1))); do
+ if [[ "$1" = "${ESSIDS[$i]}" ]]; then
+ printf "%s" "${PROFILES[$i]}"
+ return 0
+ fi
+ done
+ return 1
+}
+
+# Creates a profile for ssid $1.
+create_profile()
+{
+ local flags key msg security
+ PROFILE="$INTERFACE-$1"
+ [[ -f "$PROFILE_DIR/$PROFILE" ]] && PROFILE+=".wifi-menu"
+ flags="$(grep -m 1 $'\t'"$1\$" "$NETWORKS" | cut -f 2)"
+ security="$(expr match "$flags" ".*\(WPA\|WEP\)")"
+ : ${security:="NONE"}
+ if [[ "$flags" =~ "PSK"|"WEP" ]]; then
+ msg="Enter $security security key for\n'$1'"
+ if [[ "$OBSCURE" ]]; then
+ key=$(wpa_passphrase "$1" "$(dialog --insecure --passwordbox \
+ "$msg" 10 40 --stdout)" \
+ | grep "^[[:space:]]*psk=")
+ RETURN=$?
+ key="KEY=${key#*psk=}"
+ else
+ key="KEY='$(dialog --inputbox "$msg" 10 40 --stdout)'"
+ RETURN=$?
+ fi
+ [[ $RETURN -eq 0 ]] || return $RETURN
+ fi
+ cat << EOF > "$PROFILE_DIR/$PROFILE" || return 4
+CONNECTION='wireless'
+DESCRIPTION='Automatically generated profile by wifi-menu'
+INTERFACE='$INTERFACE'
+SECURITY='${security,,}'
+ESSID='$1'
+IP='dhcp'
+$key
+EOF
+ printf "%s" "$PROFILE"
+ return 0
+}
+
+# Connects to ssid $1 using an available profile or an automatically created
+# one if none exists.
+connect_to_ssid()
+{
+ local msg
+ PROFILE=$(ssid_to_profile "$1")
+ if [[ $? -eq 0 ]]; then
+ clear
+ check_profile "$PROFILE" && profile_down "$PROFILE"
+ else
+ PROFILE=$(create_profile "$1")
+ RETURN=$?
+ [[ $RETURN -eq 0 ]] || return $RETURN
+ SPAWNED_PROFILE=1
+ clear
+ fi
+ if ! profile_up "$PROFILE"; then
+ if [[ "$SPAWNED_PROFILE" ]]; then
+ msg=" CONNECTING FAILED
+
+Do you want to keep the generated profile ('$PROFILE')?"
+ dialog --yesno "$msg" 10 40 --stdout || rm "$PROFILE_DIR/$PROFILE"
+ clear
+ fi
+ return 2
+ fi
+ return 0
+}
+
+while [[ "$1" = -* ]]; do
+ case "$1" in
+ -h|--help)
+ usage
+ exit
+ ;;
+ -o|--obscure)
+ OBSCURE=1
+ shift
+ ;;
+ -*)
+ report_err "Invalid option: $1"
+ usage
+ exit 255
+ ;;
+ esac
+done
+if [[ $# -gt 1 ]]; then
+ report_err "Too many arguments"
+ usage
+ exit 255
+fi
+
+if [[ $(id -u) -ne 0 ]]; then
+ exit_stderr "This script needs to be run with root privileges"
+fi
+
+INTERFACE="${1-$WIRELESS_INTERFACE}"
+if [[ -z "$INTERFACE" ]]; then
+ report_err "Missing interface specification"
+ usage
+ exit 255
+fi
+
+cd / # We do not want to spawn anything that can block unmounting
+is_interface "$INTERFACE" || exit_fail "No such interface: $INTERFACE"
+if [[ -z "$(ip link show up dev $INTERFACE)" ]]; then
+ [[ -f "$IFACE_DIR/$INTERFACE" ]] && . "$IFACE_DIR/$INTERFACE"
+ bring_interface up "$INTERFACE" || exit_fail "Interface unavailable"
+ SPAWNED_INTERFACE=1
+fi
+
+report_try "Scanning for networks"
+CONNECTION=$(expr substr \
+ "$(wpa_cli -p "$WPA_CTRL_PATH" -i "$INTERFACE" status \
+ 2> /dev/null | grep "^ssid=")" 6 32)
+init_profiles "$INTERFACE"
+NETWORKS=$(wpa_supplicant_scan_info "$INTERFACE" 3,4,5)
+[[ $? -eq 0 ]] && init_entries "$NETWORKS"
+if [[ ${#ENTRIES[@]} -eq 0 ]]; then
+ report_fail
+ RETURN=3
+else
+ report_success
+ MSG="Select the network you wish to use
+Flags description:
+ * - handmade profile present
+ + - automatically generated profile present
+ - - no profile present
+ ! - active connection present"
+ CHOICE=$(dialog --column-separator : --menu "$MSG" 24 50 12 \
+ "${ENTRIES[@]}" --stdout)
+ RETURN=$?
+ if [[ $RETURN -eq 0 ]]; then
+ connect_to_ssid "$CHOICE"
+ RETURN=$?
+ fi
+fi
+case $RETURN in
+ 0|2) # Connected | Connecting failed
+ ;;
+ 1) # Canceled
+ clear
+ ;;
+ 3) # No networks found
+ report_err "No networks found"
+ ;;
+ 4) # Unable to create profile
+ clear
+ report_err "Could not create a profile for '$CHOICE'"
+ ;;
+ 255) # ESC or error
+ clear
+ report_err "Aborted"
+ ;;
+ *) # Should not happen
+ clear
+ report_err "Unexpected return code from dialog: $RETURN"
+ RETURN=7
+ ;;
+esac
+[[ -f "$NETWORKS" ]] && rm -f "$NETWORKS"
+[[ $RETURN -ne 0 && "$SPAWNED_INTERFACE" ]] && bring_interface down "$INTERFACE"
+exit $RETURN