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config/waybar/scripts/wireguard.sh

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+#!/usr/bin/env bash
+
+# nmcli WireGuard abstraction layer for use with my waybar module and rofi custom menu script
+#
+# requires nmcli on your path
+# install to the same directory as wireguard-rofi.sh
+#
+# usage: ./wireguard.sh [short|menu|toggle NAME]
+# no argument:   print current connections
+# short:         print current connections in short format
+# menu:          print all connections
+# toggle NAME:   toggle connection NAME
+
+if ! command -v nmcli >/dev/null 2>&1; then
+    echo "ERROR: 'nmcli' not found"
+    echo "This tool is a 'nmcli' frontend, hence you should install NetworkManager before trying to use it."
+    exit 1
+fi
+
+nargs=$#
+get="no"
+showmenu="no"
+short="no"
+dotoggle="no"
+if [[ $nargs == 0 ]]
+then
+    get="yes"
+elif [[ $nargs == 1 ]]
+then
+    if [[ $1 == "menu" ]]
+    then
+        showmenu="yes"
+    elif [[ $1 == "short" ]]
+    then
+        if ! command -v sed >/dev/null 2>&1; then
+            echo "ERROR: 'sed' not found"
+            echo "Please install 'sed' to enable the 'short' option."
+            exit 1
+        fi
+        get="yes"
+        short="short"
+    fi
+elif [[ $nargs == 2 ]]
+then
+    if [[ $1 == "toggle" ]]
+    then
+        dotoggle="yes"
+        conn="$2"
+    fi
+fi
+
+nmclicmd="nmcli connection"
+wgconns="$nmclicmd show"
+wgactive="$wgconns --active"
+
+connected=()
+available=()
+
+function get_conns {
+    while read -r name uuid type device
+    do
+        if [[ $type != "wireguard" ]]
+        then
+            continue
+        fi
+
+        if [[ $device != "--" ]]
+        then
+            while read -r key value
+            do
+                if [[ $key != "ipv4.addresses:" ]]
+                then
+                    continue
+                fi
+                connected+=("$name: $value")
+            done < <($wgconns $name)
+        else
+            available+=("$name")
+        fi
+    done < <($1)
+}
+
+function print_conns {
+    local first="yes"
+    local array_print="$1[@]"
+    local array_print=("${!array_print}")
+    local text=""
+    local tooltip=""
+    if [ "${#array_print[@]}" -le 0 ]
+    then
+        return
+    fi
+    if [[ "$2" == "list" ]]
+    then
+        for c in "${array_print[@]}"
+        do
+            echo "$1: $c"
+        done
+    else
+        for c in "${array_print[@]}"
+        do
+            if [[ "$first" != "yes" ]]
+            then
+                text="$text | "
+                tooltip="$tooltip\n"
+            fi
+            if [[ "$2" == "short" ]]
+            then
+                text="$text$(echo -n $c | sed -E 's/^(.+): ([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\/[0-9]+)$/\1/')"
+            else
+                text="$text$c"
+            fi
+            tooltip="$tooltip$c"
+            first="no"
+        done
+        echo "{\"text\": \"$text\", \"tooltip\": \"$tooltip\"}"
+    fi
+}
+
+function array_contains {
+    local array_has="$1[@]"
+    local array_has=("${!array_has}")
+    local element="$2"
+    for e in "${array_has[@]}"
+    do
+        if [[ "$e" == *"$element"* ]]
+        then
+            echo "yes"
+            return
+        fi
+    done
+    echo "no"
+}
+
+if [[ $get == "yes" ]]
+then
+    get_conns "$wgactive"
+    print_conns connected "$short"
+
+elif [[ $showmenu == "yes" ]]
+then
+    get_conns "$wgconns"
+    print_conns connected "list"
+    print_conns available "list"
+
+
+elif [[ $dotoggle == "yes" ]]
+then
+    get_conns "$wgconns"
+
+    if [[ "$(array_contains connected $conn)" == "yes" ]]
+    then
+        $nmclicmd down "$conn"
+    elif [[ "$(array_contains available $conn)" == "yes" ]]
+    then
+        $nmclicmd up "$conn"
+    else
+        echo "err: connection not found"
+        exit 1
+    fi
+
+else
+    echo "err: wrong args"
+    exit 1
+fi