from collections import defaultdict from functools import cache import json from flask import ( Flask, make_response, redirect, request, jsonify, render_template, send_from_directory, send_file, ) import os import json import requests import dns.resolver import dns.message import dns.query import dns.name import dns.rdatatype import ssl import dnslib import dnslib.dns import socket from datetime import datetime from dateutil import relativedelta import dotenv dotenv.load_dotenv() app = Flask(__name__) node_names = { "18.169.98.42": "Easy HNS", "172.233.46.92": "EZ Domains", "194.50.5.27": "Nathan.Woodburn/", "139.177.195.185": "HNSCanada", "172.105.120.203": "EZ Domains", } node_locations = { "18.169.98.42": "England", "172.233.46.92": "Netherlands", "194.50.5.27": "Australia", "139.177.195.185": "Canada", "172.105.120.203": "Singapore", } nodes = [] manual_nodes = [] last_log = datetime.now() - relativedelta.relativedelta(years=1) sent_notifications = {} log_dir = "/data" if not os.path.exists(log_dir): if not os.path.exists("./logs"): os.mkdir("./logs") log_dir = "./logs" if not os.path.exists(f"{log_dir}/node_status.json"): with open(f"{log_dir}/node_status.json", "w") as file: json.dump([], file) if not os.path.exists(f"{log_dir}/sent_notifications.json"): with open(f"{log_dir}/sent_notifications.json", "w") as file: json.dump({}, file) else: with open(f"{log_dir}/sent_notifications.json", "r") as file: sent_notifications = json.load(file) if (os.getenv("NODES")): manual_nodes = os.getenv("NODES").split(",") print(f"Log directory: {log_dir}", flush=True) def find(name, path): for root, dirs, files in os.walk(path): if name in files: return os.path.join(root, name) # Assets routes @app.route("/assets/") def send_report(path): if path.endswith(".json"): return send_from_directory( "templates/assets", path, mimetype="application/json" ) if os.path.isfile("templates/assets/" + path): return send_from_directory("templates/assets", path) # Try looking in one of the directories filename: str = path.split("/")[-1] if ( filename.endswith(".png") or filename.endswith(".jpg") or filename.endswith(".jpeg") or filename.endswith(".svg") ): if os.path.isfile("templates/assets/img/" + filename): return send_from_directory("templates/assets/img", filename) return render_template("404.html"), 404 # region Special routes @app.route("/favicon.png") def faviconPNG(): return send_from_directory("templates/assets/img", "favicon.png") @app.route("/.well-known/") def wellknown(path): # Try to proxy to https://nathan.woodburn.au/.well-known/ req = requests.get(f"https://nathan.woodburn.au/.well-known/{path}") return make_response( req.content, 200, {"Content-Type": req.headers["Content-Type"]} ) # endregion # region Helper functions def get_node_list() -> list: ips = [] # Do a DNS lookup result: dns.resolver.Answer = dns.resolver.resolve("hnsdoh.com", "A") # Print the IP addresses for ipval in result: ips.append(ipval.to_text()) # Add manual nodes for node in manual_nodes: if node not in ips: print(f"Adding manual node: {node}", flush=True) ips.append(node) return ips def check_plain_dns(ip: str) -> bool: resolver = dns.resolver.Resolver() resolver.nameservers = [ip] try: result = resolver.resolve("1.wdbrn", "TXT") for txt in result: if "Test 1" in txt.to_text(): return True return False except Exception as e: print(e) return False def build_dns_query(domain: str, qtype: str = "A"): """ Constructs a DNS query in binary wire format using dnslib. """ q = dnslib.DNSRecord.question(domain, qtype) return q.pack() def check_doh(ip: str) -> dict: status = False server_name = [] try: dns_query = build_dns_query("2.wdbrn", "TXT") request = ( f"POST /dns-query HTTP/1.1\r\n" f"Host: hnsdoh.com\r\n" "Content-Type: application/dns-message\r\n" f"Content-Length: {len(dns_query)}\r\n" "Connection: close\r\n" "\r\n" ) wireframe_request = request.encode() + dns_query sock = socket.create_connection((ip, 443)) context = ssl.create_default_context() ssock = context.wrap_socket(sock, server_hostname="hnsdoh.com") ssock.sendall(wireframe_request) response_data = b"" while True: data = ssock.recv(4096) if not data: break response_data += data response_str = response_data.decode("latin-1") headers, body = response_str.split("\r\n\r\n", 1) # Try to get server from headers for header in headers.split("\r\n"): if header.startswith("Server:"): server_name.append(header.split(":")[1].strip()) dns_response: dnslib.DNSRecord = dnslib.DNSRecord.parse(body.encode("latin-1")) for rr in dns_response.rr: if "Test 2" in str(rr): status = True except Exception as e: print(e) finally: # Close the socket connection # Check if ssock is defined if "ssock" in locals(): ssock.close() return {"status": status, "server": server_name} def check_dot(ip: str) -> bool: qname = dns.name.from_text("3.wdbrn") q = dns.message.make_query(qname, dns.rdatatype.TXT) try: response = dns.query.tls( q, ip, timeout=5, port=853, server_hostname="hnsdoh.com" ) if response.rcode() == dns.rcode.NOERROR: for rrset in response.answer: for rr in rrset: if "Test 3" in rr.to_text(): return True return False except Exception as e: print(e) return False def verify_cert(ip: str, port: int) -> bool: expires = "ERROR" valid = False expiry_date_str = (datetime.now() - relativedelta.relativedelta(years=1)).strftime("%b %d %H:%M:%S %Y GMT") try: sock = socket.create_connection((ip, port)) # Wrap the socket in SSL/TLS context = ssl.create_default_context() ssock = context.wrap_socket(sock, server_hostname="hnsdoh.com") # Retrieve the server's certificate cert = ssock.getpeercert() # Extract the expiry date from the certificate expiry_date_str = cert["notAfter"] # Convert the expiry date string to a datetime object expiry_date = datetime.strptime(expiry_date_str, "%b %d %H:%M:%S %Y GMT") expires = format_relative_time(expiry_date) valid = expiry_date > datetime.now() except Exception as e: print(e) finally: # Close the SSL and socket connection if "ssock" in locals(): ssock.close() return {"valid": valid, "expires": expires, "expiry_date": expiry_date_str} def format_relative_time(expiry_date: datetime) -> str: now = datetime.now() delta = expiry_date - now if delta.days > 0: return f"in {delta.days} days" if delta.days > 1 else "in 1 day" elif delta.days < 0: return f"{-delta.days} days ago" if -delta.days > 1 else "1 day ago" elif delta.seconds >= 3600: hours = delta.seconds // 3600 return f"in {hours} hours" if hours > 1 else "in 1 hour" elif delta.seconds >= 60: minutes = delta.seconds // 60 return f"in {minutes} minutes" if minutes > 1 else "in 1 minute" else: return f"in {delta.seconds} seconds" if delta.seconds > 1 else "in 1 second" def format_last_check(last_log: datetime) -> str: now = datetime.now() delta = now - last_log if delta.days > 0: return f"{delta.days} days ago" if delta.days > 1 else "1 day ago" elif delta.days < 0: return f"in {-delta.days} days" if -delta.days > 1 else "in 1 day" elif delta.seconds >= 3600: hours = delta.seconds // 3600 return f"{hours} hours ago" if hours > 1 else "1 hour ago" elif delta.seconds >= 60: minutes = delta.seconds // 60 return f"{minutes} minutes ago" if minutes > 1 else "1 minute ago" else: return "less than a minute ago" def check_nodes() -> list: global nodes if last_log > datetime.now() - relativedelta.relativedelta(minutes=1): # Load the last log with open(f"{log_dir}/node_status.json", "r") as file: data = json.load(file) newest = { "date": datetime.now() - relativedelta.relativedelta(years=1), "nodes": [], } for entry in data: if datetime.strptime(entry["date"], "%Y-%m-%d %H:%M:%S") > newest["date"]: newest = entry newest["date"] = datetime.strptime(newest["date"], "%Y-%m-%d %H:%M:%S") node_status = newest["nodes"] else: if len(nodes) == 0: nodes = get_node_list() node_status = [] for ip in nodes: node_status.append( { "ip": ip, "name": node_names[ip] if ip in node_names else ip, "location": ( node_locations[ip] if ip in node_locations else "Unknown" ), "plain_dns": check_plain_dns(ip), "doh": check_doh(ip)["status"], "doh_server": check_doh(ip)["server"], "dot": check_dot(ip), "cert": verify_cert(ip, 443), "cert_853": verify_cert(ip, 853), } ) else: node_status = [] for ip in nodes: node_status.append( { "ip": ip, "name": node_names[ip] if ip in node_names else ip, "location": ( node_locations[ip] if ip in node_locations else "Unknown" ), "plain_dns": check_plain_dns(ip), "doh": check_doh(ip)["status"], "doh_server": check_doh(ip)["server"], "dot": check_dot(ip), "cert": verify_cert(ip, 443), "cert_853": verify_cert(ip, 853), } ) # Save the node status to a file log_status(node_status) print("Finished checking nodes", flush=True) # Send notifications if any nodes are down for node in node_status: if ( not node["plain_dns"] or not node["doh"] or not node["dot"] or not node["cert"]["valid"] or not node["cert_853"]["valid"] ): send_down_notification(node) continue # Check if cert is expiring in 7 days cert_expiry = datetime.strptime( node["cert"]["expiry_date"], "%b %d %H:%M:%S %Y GMT" ) if cert_expiry < datetime.now() + relativedelta.relativedelta(days=7): send_down_notification(node) continue cert_853_expiry = datetime.strptime( node["cert_853"]["expiry_date"], "%b %d %H:%M:%S %Y GMT" ) if cert_853_expiry < datetime.now() + relativedelta.relativedelta(days=7): send_down_notification(node) return node_status def check_nodes_from_log() -> list: global last_log # Load the last log with open(f"{log_dir}/node_status.json", "r") as file: data = json.load(file) newest = { "date": datetime.now() - relativedelta.relativedelta(years=1), "nodes": [], } for entry in data: if datetime.strptime(entry["date"], "%Y-%m-%d %H:%M:%S") > newest["date"]: newest = entry newest["date"] = datetime.strptime(newest["date"], "%Y-%m-%d %H:%M:%S") node_status = newest["nodes"] if datetime.now() > newest["date"] + relativedelta.relativedelta(minutes=10): print("Failed to get a new enough log, checking nodes", flush=True) node_status = check_nodes() else: last_log = newest["date"] return node_status def send_notification(title, description, author): discord_hook = os.getenv("DISCORD_HOOK") if discord_hook: data = { "content": "", "embeds": [ { "title": title, "description": description, "url": "https://status.hnsdoh.com", "color": 5814783, "author": { "name": author, "icon_url": "https://status.hnsdoh.com/favicon.png", }, } ], "username": "HNSDoH", "avatar_url": "https://status.hnsdoh.com/favicon.png", "attachments": [], } response = requests.post(discord_hook, json=data) print("Sent notification", flush=True) else: print("No discord hook", flush=True) def send_down_notification(node): global sent_notifications # Check if a notification has already been sent if node["ip"] not in sent_notifications: sent_notifications[node["ip"]] = datetime.strftime( datetime.now(), "%Y-%m-%d %H:%M:%S" ) else: last_send = datetime.strptime( sent_notifications[node["ip"]], "%Y-%m-%d %H:%M:%S" ) if last_send > datetime.now() - relativedelta.relativedelta(hours=1): print( f"Notification already sent for {node['name']} in the last hr", flush=True, ) return # Only send certain notifications once per day if node["plain_dns"] and node["doh"] and node["dot"]: if last_send > datetime.now() - relativedelta.relativedelta(days=1): print( f"Notification already sent for {node['name']} in the last day", flush=True, ) return # Save the notification to the file sent_notifications[node["ip"]] = datetime.strftime( datetime.now(), "%Y-%m-%d %H:%M:%S" ) with open(f"{log_dir}/sent_notifications.json", "w") as file: json.dump(sent_notifications, file, indent=4) title = f"{node['name']} is down" description = f"{node['name']} ({node['ip']}) is down with the following issues:\n" if not node["plain_dns"]: description += "- Plain DNS is down\n" if not node["doh"]: description += "- DoH is down\n" if not node["dot"]: description += "- DoT is down\n" if not node["cert"]["valid"]: description += "- Certificate on port 443 is invalid\n" if not node["cert_853"]["valid"]: description += "- Certificate on port 853 is invalid\n" if node["plain_dns"] and node["doh"] and node["dot"]: if node["cert"]["valid"] and node["cert_853"]["valid"]: description = f"The certificate on {node['name']} ({node['ip']}) is expiring soon\n" title = f"{node['name']} certificate is expiring soon" # Also add the expiry date of the certificates description += "\nCertificate expiry dates:\n" description += f"- Certificate on port 443 expires {node['cert']['expires']}\n" description += f"- Certificate on port 853 expires {node['cert_853']['expires']}\n" send_notification(title, description, node["name"]) # endregion # region File logs def log_status(node_status: list): global last_log last_log = datetime.now() # Check if the file exists filename = f"{log_dir}/node_status.json" if os.path.isfile(filename): with open(filename, "r") as file: data = json.load(file) else: data = [] # Get oldest date oldest = datetime.now() newest = datetime.now() - relativedelta.relativedelta(years=1) for entry in data: date = datetime.strptime(entry["date"], "%Y-%m-%d %H:%M:%S") if date < oldest: oldest = date if date > newest: newest = date # If the oldest date is more than 7 days ago, save the file and create a new one if (datetime.now() - oldest).days > 7: # Copy the file to a new one new_filename = f"{log_dir}/node_status_{newest.strftime('%Y-%m-%d')}.json" os.rename(filename, new_filename) data = [] # Add the new entry data.append( {"date": datetime.now().strftime("%Y-%m-%d %H:%M:%S"), "nodes": node_status} ) with open(filename, "w") as file: json.dump(data, file, indent=4) # endregion # region History functions def get_history(days: int) -> list: log_files = [ f for f in os.listdir(log_dir) if f.endswith(".json") and f.startswith("node_status") ] history = [] for log_file in log_files: file_path = os.path.join(log_dir, log_file) with open(file_path, "r") as file: data = json.load(file) for entry in data: entry_date = datetime.strptime(entry["date"], "%Y-%m-%d %H:%M:%S") if datetime.now() - relativedelta.relativedelta(days=days) < entry_date: history.append(entry) return history def summarize_history(history: list) -> dict: nodes_status = defaultdict( lambda: { "name": "", "location": "", "ip": "", "plain_dns": {"last_down": "Never", "percentage": 0}, "doh": {"last_down": "Never", "percentage": 0}, "dot": {"last_down": "Never", "percentage": 0}, } ) overall_status = { "plain_dns": {"last_down": "Never", "percentage": 0}, "doh": {"last_down": "Never", "percentage": 0}, "dot": {"last_down": "Never", "percentage": 0}, } # Collect data total_counts = defaultdict( lambda: { "plain_dns": {"down": 0, "total": 0}, "doh": {"down": 0, "total": 0}, "dot": {"down": 0, "total": 0}, } ) for entry in history: date = datetime.strptime(entry["date"], "%Y-%m-%d %H:%M:%S") for node in entry["nodes"]: ip = node["ip"] # Update node details if not already present if nodes_status[ip]["name"] == "": nodes_status[ip]["name"] = node.get("name", "") nodes_status[ip]["location"] = node.get("location", "") nodes_status[ip]["ip"] = ip # Update counts and last downtime for key in ["plain_dns", "doh", "dot"]: status = node.get(key, "up") if status == False: total_counts[ip][key]["down"] += 1 total_counts[ip][key]["total"] += 1 # Update last downtime for each key for key in ["plain_dns", "doh", "dot"]: if node.get(key) == False: nodes_status[ip][key]["last_down"] = date.strftime( "%Y-%m-%d %H:%M:%S" ) # Calculate percentages and prepare final summary node_list = [] for ip, status in nodes_status.items(): node_data = status.copy() for key in ["plain_dns", "doh", "dot"]: total = total_counts[ip][key]["total"] down = total_counts[ip][key]["down"] if total > 0: node_data[key]["percentage"] = ((total - down) / total) * 100 # Round to 2 decimal places node_data[key]["percentage"] = round(node_data[key]["percentage"], 2) else: node_data[key]["percentage"] = 100 node_list.append(node_data) # Aggregate overall status overall_counts = { "plain_dns": {"down": 0, "total": 0}, "doh": {"down": 0, "total": 0}, "dot": {"down": 0, "total": 0}, } for ip, counts in total_counts.items(): for key in ["plain_dns", "doh", "dot"]: overall_counts[key]["total"] += counts[key]["total"] overall_counts[key]["down"] += counts[key]["down"] for key in ["plain_dns", "doh", "dot"]: total = overall_counts[key]["total"] down = overall_counts[key]["down"] if total > 0: overall_status[key]["percentage"] = ((total - down) / total) * 100 # Round to 2 decimal places overall_status[key]["percentage"] = round(overall_status[key]["percentage"], 2) last_downs = [ nodes_status[ip][key]["last_down"] for ip in nodes_status if nodes_status[ip][key]["last_down"] != "Never" ] if last_downs: overall_status[key]["last_down"] = max(last_downs) else: overall_status[key]["percentage"] = 100 return {"nodes": node_list, "overall": overall_status, "check_counts": total_counts} def convert_nodes_to_dict(nodes): nodes_dict = {} for node in nodes: ip = node.get("ip") if ip: nodes_dict[ip] = node return nodes_dict # endregion # region API routes @app.route("/api") def api_index(): agent = request.headers.get("User-Agent") # Check if the request is not from a browser nonBrowser = ["curl", "Postman", "Insomnia", "httpie", "wget", "python-requests"] endpoints = [ {"route": "/api/nodes", "description": "Get the current status of all nodes"}, { "route": "/api/history", "description": "Get a summary of the last x days of node status", "parameters": [ { "name": "days", "type": "int", "description": "Number of days to get the history for", } ], }, { "route": "/api/history/", "description": "Get a summary of the last x days of node status", }, { "route": "/api/full", "description": "Get the full history of node status for the last x days", "parameters": [ { "name": "days", "type": "int", "description": "Number of days to get the history for", } ], }, {"route": "/api/refresh", "description": "Force a status check of all nodes"}, ] if any(agent.lower().find(x) != -1 for x in nonBrowser): print("API request", flush=True) return jsonify({"status": "ok", "endpoints": endpoints}) else: # Redirect to the main page return render_template("api.html",endpoints=endpoints) @app.route("/api/nodes") def api_nodes(): node_status = check_nodes_from_log() return jsonify(node_status) @app.route("/api/history") def api_history(): history_days = 7 if "days" in request.args: try: history_days = int(request.args["days"]) except: pass history = get_history(history_days) history_summary = summarize_history(history) return jsonify(history_summary) @app.route("/api/history/") def api_history_days(days: int): history = get_history(days) history_summary = summarize_history(history) return jsonify(history_summary) @app.route("/api/full") def api_all(): history_days = 7 if "history" in request.args: try: history_days = int(request.args["history"]) except: pass if "days" in request.args: try: history_days = int(request.args["days"]) except: pass history = get_history(history_days) return jsonify(history) @app.route("/api/refresh") def api_refresh(): node_status = check_nodes() return jsonify(node_status) # endregion # region Main routes @app.route("/") def index(): node_status = check_nodes_from_log() alerts = [] warnings = [] for node in node_status: node["class"] = "normal" if not node["plain_dns"]: node["class"] = "error" alerts.append(f"{node['name']} does not support plain DNS") if not node["doh"]: node["class"] = "error" alerts.append(f"{node['name']} does not support DoH") if not node["dot"]: node["class"] = "error" alerts.append(f"{node['name']} does not support DoT") if not node["cert"]["valid"]: node["class"] = "error" alerts.append(f"{node['name']} has an invalid certificate") if not node["cert_853"]["valid"]: node["class"] = "error" alerts.append(f"{node['name']} has an invalid certificate on port 853") cert_expiry = datetime.strptime( node["cert"]["expiry_date"], "%b %d %H:%M:%S %Y GMT" ) if cert_expiry < datetime.now(): node["class"] = "error" alerts.append(f"The {node['name']} node's certificate has expired") continue elif cert_expiry < datetime.now() + relativedelta.relativedelta(days=7): node["class"] = "warning" warnings.append( f"The {node['name']} node's certificate is expiring {format_relative_time(cert_expiry)}" ) continue cert_853_expiry = datetime.strptime( node["cert_853"]["expiry_date"], "%b %d %H:%M:%S %Y GMT" ) if cert_853_expiry < datetime.now(): node["class"] = "error" alerts.append( f"The {node['name']} node's certificate has expired for DNS over TLS (port 853)" ) continue elif cert_853_expiry < datetime.now() + relativedelta.relativedelta(days=7): node["class"] = "warning" warnings.append( f"The {node['name']} node's certificate is expiring {format_relative_time(cert_853_expiry)} for DNS over TLS (port 853)" ) history_days = 30 if "history" in request.args: try: history_days = int(request.args["history"]) except: pass history = get_history(history_days) history_summary = summarize_history(history) # Convert time to relative time for node in history_summary["nodes"]: for key in ["plain_dns", "doh", "dot"]: if node[key]["last_down"] == "Never": node[key]["last_down"] = "over 30 days ago" else: node[key]["last_down"] = format_last_check( datetime.strptime(node[key]["last_down"], "%Y-%m-%d %H:%M:%S") ) for key in ["plain_dns", "doh", "dot"]: if history_summary["overall"][key]["last_down"] == "Never": continue history_summary["overall"][key]["last_down"] = format_last_check( datetime.strptime(history_summary["overall"][key]["last_down"], "%Y-%m-%d %H:%M:%S") ) history_summary["nodes"] = convert_nodes_to_dict(history_summary["nodes"]) last_check = format_last_check(last_log) # Replace true/false with up/down for node in node_status: for key in ["plain_dns", "doh", "dot"]: if node[key]: node[key] = "Up" else: node[key] = "Down" return render_template( "index.html", nodes=node_status, warnings=warnings, alerts=alerts, history=history_summary, last_check=last_check, ) @app.route("/manifest.json") def manifest(): with open("templates/manifest.json", "r") as file: manifest = json.load(file) manifest["start_url"] = request.url_root return jsonify(manifest) @app.route("/") def catch_all(path: str): if os.path.isfile("templates/" + path): return render_template(path) # Try with .html if os.path.isfile("templates/" + path + ".html"): return render_template(path + ".html") if os.path.isfile("templates/" + path.strip("/") + ".html"): return render_template(path.strip("/") + ".html") # Try to find a file matching if path.count("/") < 1: # Try to find a file matching filename = find(path, "templates") if filename: return send_file(filename) return render_template("404.html"), 404 # endregion # region Error Catching # 404 catch all @app.errorhandler(404) def not_found(e): return render_template("404.html"), 404 # endregion if __name__ == "__main__": app.run(debug=True, port=5000, host="0.0.0.0")