randomize the sequence number for SYN packets

wikicensorship · Feb 6, 2022 · 17b143e · 17b143e
1 parent 21f3611
commit 17b143e
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/utils/trace.py b/utils/trace.py
@@ -127,6 +127,8 @@ def send_single_packet(this_request, timeout):
     this_request[IP].id = RandShort()
     if this_request.haslayer(TCP):
         this_request[TCP].sport = ephemeral_port_reserve("tcp")
+        if this_request[TCP].flags == "S":
+            this_request[TCP].seq = RandInt()
         del(this_request[TCP].chksum)
     elif this_request.haslayer(UDP):
         this_request[UDP].sport = ephemeral_port_reserve("udp")