Merge pull request #54 from RyosukeDTomita/feature/syn-rst-packet

Send RST packets in the half open state of SYN scan
RyosukeDTomita · Aug 30, 2024 · 3a1f499 · 3a1f499
2 parents 4627f6c + 460d6a4
commit 3a1f499
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/my_portscanner/scan_tools/SynScan.py b/src/my_portscanner/scan_tools/SynScan.py
@@ -53,7 +53,13 @@ def _port_scan(self, port: int) -> dict:
         except AttributeError:
             return
 
+        # SYN/ACKパケットが返ってきた場合には，openとする
         if response_packet[TCP].flags == "SA":
+            # RSTパケットを送信することで，コネクションを切断し，ハーフオープン状態を解消する
+            sr1(
+                IP(dst=self.target_ip) / TCP(dport=port, flags="RA"),
+                timeout=self.max_rtt_timeout / 1000,
+            )
             return {"port": port, "state": "open"}
         # RSTパケットが変えてきたときにはclosedとする
         elif response_packet[TCP].flags == "RA":