LAN WOL 대상 판정 정리

touch_panel/panel.py

@@ -28,7 +28,7 @@ NET_GROUPS = {
 }
 
 PC_IP = "192.168.50.73"
-PC_MAC = "74:56:3C:CD:CD:79"
+PC_DHCP_LEASE_FILE = "/var/lib/misc/dnsmasq.leases"
 SYNOLOGY_PING_HOST = "chaegeon.com"
 SYNOLOGY_SSH = [
     "/usr/bin/ssh",
@@ -339,15 +339,46 @@ def compact_count(value):
     return str(value)
 
 
-def send_magic_packet(mac):
+def normalize_mac(mac):
     clean = mac.replace(":", "").replace("-", "")
     if len(clean) != 12:
+        return ""
+    try:
+        bytes.fromhex(clean)
+    except ValueError:
+        return ""
+    return ":".join(clean[i:i + 2] for i in range(0, 12, 2)).lower()
+
+
+def dhcp_mac_for_ip(ip):
+    for line in read_text(PC_DHCP_LEASE_FILE).splitlines():
+        parts = line.split()
+        if len(parts) >= 3 and parts[2] == ip:
+            mac = normalize_mac(parts[1])
+            if mac:
+                return mac
+    return ""
+
+
+def broadcast_targets_for_ip(ip):
+    parts = ip.split(".")
+    targets = []
+    if len(parts) == 4 and all(part.isdigit() and 0 <= int(part) <= 255 for part in parts):
+        targets.append(".".join(parts[:3] + ["255"]))
+    targets.append("255.255.255.255")
+    return list(dict.fromkeys(targets))
+
+
+def send_magic_packet(mac, ip=PC_IP):
+    mac = normalize_mac(mac)
+    if not mac:
         return False
+    clean = mac.replace(":", "")
     packet = bytes.fromhex("ff" * 6 + clean * 16)
     try:
         with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
             sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
-            for target in ["192.168.50.255", "255.255.255.255"]:
+            for target in broadcast_targets_for_ip(ip):
                 sock.sendto(packet, (target, 9))
         return True
     except OSError:
@@ -532,10 +563,13 @@ class PcWakeButton(StatusTile):
                 self.error_until = 0.0
                 self.error_dot.set_steady(False)
                 self.detail.setText("깨우는 중")
-                if not send_magic_packet(PC_MAC):
+                mac = dhcp_mac_for_ip(PC_IP)
+                if not mac or not send_magic_packet(mac, PC_IP):
                     self.wait_until = 0.0
                     self.error_until = now + 5
                     self.error_dot.set_steady(True)
+                    self.write_dot.set_steady(False)
+                    self.detail.setText("MAC 없음" if not mac else "실패")
         super().mousePressEvent(event)
 
     def tick(self):