Initial commit — SetecMITM generic IoT MITM framework

Templated from cam-mitm. The camera-specific code (UBox cloud client,
CVE verifiers, OAM HMAC signing, fuzzer wordlists) is removed; what's
left is the generic core: ARP spoof, DNS spoof, HTTP/HTTPS interception
with peek-before-wrap, raw sniffer with conntrack-based original-dst
lookup, protocol fingerprinting, intruder detection, packet injection,
log rotation, PyQt6 GUI on top of a service Controller.

All 'camera' references renamed to 'target' throughout. Configuration
moved into ~/.config/setec-mitm/config.json with the Settings tab as
the primary editor. Plugin system at targets/<name>/plugin.py for
vendor-specific code.

See README.md for full setup, plugin authoring, and troubleshooting.

Co-authored by Setec Labs.

utils/log.py

@@ -0,0 +1,99 @@
+"""Shared logging and hex formatting utilities"""
+
+import os
+import threading
+from datetime import datetime
+from collections import deque
+
+lock = threading.Lock()
+log_lines = deque(maxlen=2000)
+_logfile = None
+_logfile_path = None
+LOG_MAX_BYTES = 1024 * 1024 * 1024  # 1 GiB
+_log_rotate_lock = threading.Lock()
+
+# Color codes for TUI
+C_NONE = 0
+C_ERROR = 1
+C_SUCCESS = 2
+C_INFO = 3
+C_TRAFFIC = 4
+C_IMPORTANT = 5
+
+
+def init_logfile(path):
+    global _logfile, _logfile_path
+    os.makedirs(os.path.dirname(path), exist_ok=True)
+    _logfile_path = path
+    _logfile = open(path, "a")
+
+
+def close_logfile():
+    global _logfile
+    if _logfile:
+        _logfile.close()
+        _logfile = None
+
+
+def _maybe_rotate():
+    """Rotate the active log file if it exceeds LOG_MAX_BYTES."""
+    global _logfile
+    if not _logfile or not _logfile_path:
+        return
+    try:
+        size = os.fstat(_logfile.fileno()).st_size
+    except OSError:
+        return
+    if size < LOG_MAX_BYTES:
+        return
+    with _log_rotate_lock:
+        try:
+            size = os.fstat(_logfile.fileno()).st_size
+            if size < LOG_MAX_BYTES:
+                return
+            _logfile.close()
+            ts = datetime.now().strftime("%Y%m%d_%H%M%S")
+            os.rename(_logfile_path, f"{_logfile_path}.{ts}")
+            _logfile = open(_logfile_path, "a")
+            _logfile.write(f"[{datetime.now().strftime('%H:%M:%S')}] log rotated (>1GB)\n")
+            _logfile.flush()
+        except Exception as e:
+            try:
+                _logfile = open(_logfile_path, "a")
+            except Exception:
+                _logfile = None
+
+
+def log(msg, color=C_NONE):
+    ts = datetime.now().strftime("%H:%M:%S")
+    line = f"[{ts}] {msg}"
+    with lock:
+        log_lines.append((line, color))
+    if _logfile:
+        try:
+            _logfile.write(line + "\n")
+            _logfile.flush()
+        except Exception:
+            pass
+        _maybe_rotate()
+
+
+def hexdump(data, max_bytes=128):
+    lines = []
+    for i in range(0, min(len(data), max_bytes), 16):
+        chunk = data[i:i + 16]
+        hx = " ".join(f"{b:02x}" for b in chunk)
+        asc = "".join(chr(b) if 32 <= b < 127 else "." for b in chunk)
+        lines.append(f"  {i:04x}  {hx:<48}  {asc}")
+    if len(data) > max_bytes:
+        lines.append(f"  ... ({len(data)} bytes total)")
+    return "\n".join(lines)
+
+
+def save_raw(log_dir, name, data):
+    import time
+    os.makedirs(log_dir, exist_ok=True)
+    path = f"{log_dir}/{name}_{int(time.time())}.bin"
+    with open(path, "wb") as f:
+        f.write(data)
+    return path