Add 20 honeypot services: email, DB, ICS, cloud, IoT, network protocols

Tier 1 (upstream images): telnet (cowrie), smtp (mailoney),
elasticsearch (elasticpot), conpot (Modbus/S7/SNMP ICS).

Tier 2 (custom asyncio honeypots): pop3, imap, mysql, mssql, redis,
mongodb, postgres, ldap, vnc, docker_api, k8s, sip, mqtt, llmnr, snmp,
tftp — each with Dockerfile, entrypoint, and protocol-accurate
handshake/credential capture.

Adds 256 pytest cases covering registration, compose fragments,
LOG_TARGET propagation, and Dockerfile presence for all 25 services.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

templates/sip/Dockerfile

@@ -0,0 +1,13 @@
+FROM debian:bookworm-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    python3 \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY sip_honeypot.py /opt/sip_honeypot.py
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+EXPOSE 5060/udp
+EXPOSE 5060/tcp
+ENTRYPOINT ["/entrypoint.sh"]

templates/sip/entrypoint.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+set -e
+exec python3 /opt/sip_honeypot.py

templates/sip/sip_honeypot.py

@@ -0,0 +1,149 @@
+#!/usr/bin/env python3
+"""
+SIP honeypot (UDP + TCP port 5060).
+Parses SIP REGISTER and INVITE messages, logs credentials from the
+Authorization header and call metadata, then responds with 401 Unauthorized.
+"""
+
+import asyncio
+import json
+import os
+import re
+import socket
+from datetime import datetime, timezone
+
+HONEYPOT_NAME = os.environ.get("HONEYPOT_NAME", "pbx")
+LOG_TARGET = os.environ.get("LOG_TARGET", "")
+
+_401 = (
+    "SIP/2.0 401 Unauthorized\r\n"
+    "Via: {via}\r\n"
+    "From: {from_}\r\n"
+    "To: {to}\r\n"
+    "Call-ID: {call_id}\r\n"
+    "CSeq: {cseq}\r\n"
+    'WWW-Authenticate: Digest realm="{host}", nonce="decnet0000", algorithm=MD5\r\n'
+    "Content-Length: 0\r\n\r\n"
+)
+
+
+def _forward(event: dict) -> None:
+    if not LOG_TARGET:
+        return
+    try:
+        host, port = LOG_TARGET.rsplit(":", 1)
+        with socket.create_connection((host, int(port)), timeout=3) as s:
+            s.sendall((json.dumps(event) + "\n").encode())
+    except Exception:
+        pass
+
+
+def _log(event_type: str, **kwargs) -> None:
+    event = {
+        "ts": datetime.now(timezone.utc).isoformat(),
+        "service": "sip",
+        "host": HONEYPOT_NAME,
+        "event": event_type,
+        **kwargs,
+    }
+    print(json.dumps(event), flush=True)
+    _forward(event)
+
+
+def _parse_headers(msg: str) -> dict:
+    headers = {}
+    for line in msg.splitlines()[1:]:
+        if ":" in line:
+            k, _, v = line.partition(":")
+            headers[k.strip().lower()] = v.strip()
+    return headers
+
+
+def _handle_message(data: bytes, src_addr) -> bytes | None:
+    try:
+        msg = data.decode(errors="replace")
+    except Exception:
+        return None
+    first_line = msg.splitlines()[0] if msg else ""
+    method = first_line.split()[0] if first_line else "UNKNOWN"
+    headers = _parse_headers(msg)
+
+    auth_header = headers.get("authorization", "")
+    username = ""
+    if auth_header:
+        m = re.search(r'username="([^"]+)"', auth_header)
+        username = m.group(1) if m else ""
+
+    _log(
+        "request",
+        src=src_addr[0],
+        src_port=src_addr[1],
+        method=method,
+        from_=headers.get("from", ""),
+        to=headers.get("to", ""),
+        username=username,
+        auth=auth_header[:256],
+    )
+
+    if method in ("REGISTER", "INVITE", "OPTIONS"):
+        response = _401.format(
+            via=headers.get("via", ""),
+            from_=headers.get("from", ""),
+            to=headers.get("to", ""),
+            call_id=headers.get("call-id", ""),
+            cseq=headers.get("cseq", ""),
+            host=HONEYPOT_NAME,
+        )
+        return response.encode()
+    return None
+
+
+class SIPUDPProtocol(asyncio.DatagramProtocol):
+    def __init__(self):
+        self._transport = None
+
+    def connection_made(self, transport):
+        self._transport = transport
+
+    def datagram_received(self, data, addr):
+        response = _handle_message(data, addr)
+        if response and self._transport:
+            self._transport.sendto(response, addr)
+
+
+class SIPTCPProtocol(asyncio.Protocol):
+    def __init__(self):
+        self._transport = None
+        self._peer = None
+        self._buf = b""
+
+    def connection_made(self, transport):
+        self._transport = transport
+        self._peer = transport.get_extra_info("peername", ("?", 0))
+
+    def data_received(self, data):
+        self._buf += data
+        if b"\r\n\r\n" in self._buf or b"\n\n" in self._buf:
+            response = _handle_message(self._buf, self._peer)
+            self._buf = b""
+            if response:
+                self._transport.write(response)
+
+    def connection_lost(self, exc):
+        pass
+
+
+async def main():
+    _log("startup", msg=f"SIP honeypot starting as {HONEYPOT_NAME}")
+    loop = asyncio.get_running_loop()
+    udp_transport, _ = await loop.create_datagram_endpoint(
+        SIPUDPProtocol, local_addr=("0.0.0.0", 5060)
+    )
+    tcp_server = await loop.create_server(SIPTCPProtocol, "0.0.0.0", 5060)
+    async with tcp_server:
+        await tcp_server.serve_forever()
+    udp_transport.close()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())