✨ Adds a simple status API for HA sensors

wireguard/config.json

@@ -13,8 +13,13 @@
     "i386"
   ],
   "ports": {
+    "80/tcp": null,
     "51820/udp": 51820
   },
+  "ports_description": {
+    "80/tcp": "WireGuard peers status API",
+    "51820/udp": "WireGuard: forward this port in your router"
+  },
   "boot": "auto",
   "hassio_api": true,
   "hassio_role": "default",

wireguard/rootfs/etc/cont-init.d/config.sh

@@ -21,6 +21,7 @@ declare post_up
 declare pre_shared_key
 declare server_private_key
 declare server_public_key
+declare filename
 
 if ! bashio::fs.directory_exists '/ssl/wireguard'; then
     mkdir -p /ssl/wireguard ||
@@ -119,6 +120,12 @@ if bashio::config.has_value 'server.dns'; then
     dns=$(bashio::config "server.dns | join(\", \")")
 fi
 
+# Status API Storage
+if ! bashio::fs.directory_exists '/var/lib/wireguard'; then
+    mkdir -p /var/lib/wireguard \
+        || bashio::exit.nok "Could not create status API storage folder"
+fi
+
 # Fetch all the peers
 for peer in $(bashio::config 'peers|keys'); do
 
@@ -222,4 +229,8 @@ for peer in $(bashio::config 'peers|keys'); do
 
     # Generate QR code with client configuration
     qrencode -t PNG -o "${config_dir}/qrcode.png" < "${config_dir}/client.conf"
+
+    # Store client name for the status API based on public key
+    filename=$(sha1sum <<< "${peer_public_key}" | awk '{ print $1 }')
+    echo -n "${name}" > "/var/lib/wireguard/${filename}"
 done

wireguard/rootfs/etc/services.d/api/run

@@ -0,0 +1,52 @@
+#!/usr/bin/with-contenv bashio
+# ==============================================================================
+# Community Hass.io Add-ons: WireGuard
+# The most simple HTTP API you've ever seen.
+# Provides status of WireGuard peers.
+# ==============================================================================
+declare -a peers
+declare endpoint
+declare json
+declare latest_handshake
+declare line
+declare name
+declare peer
+declare public_key
+declare transfer_rx
+declare transfer_tx
+
+while true; do
+    # Get information from wg
+    peers=()
+    while IFS=$'\t' read -r -a line; do
+        if [[ "${#line[@]}" -gt 6 ]]; then
+            endpoint="${line[3]}"
+            latest_handshake="${line[5]}"
+            public_key="${line[1]}"
+            transfer_rx="${line[6]}"
+            transfer_tx="${line[7]}"
+
+            peer=$(bashio::var.json \
+                    'endpoint' "${endpoint}" \
+                    'latest_handshake' "^${latest_handshake}" \
+                    'transfer_rx' "^${transfer_rx}" \
+                    'transfer_tx' "^${transfer_tx}")
+
+            filename=$(sha1sum <<< "${public_key}" | awk '{ print $1 }')
+            if bashio::fs.file_exists "/var/lib/wireguard/${filename}"; then
+                name=$(<"/var/lib/wireguard/${filename}")
+                peers+=("${name}")
+                peers+=("^${peer}")
+            fi
+        fi
+    done <<< "$(wg show all dump)"
+
+    # Build final json content
+    json="{}"
+    if [[ "${#peers[@]}" -ne 0 ]]; then
+        json=$(bashio::var.json "${peers[@]}")
+    fi
+
+    echo -e "HTTP/1.1 200 OK\r\nContent-type: application/json\r\n\r\n${json}" \
+        | nc -l -p 80 > /dev/null
+done