init script

script.py

@@ -0,0 +1,52 @@
+from time import sleep
+
+from scapy.all import ICMP, IP, Dot1Q, Ether, sendp, AsyncSniffer, wrpcap
+from tqdm import tqdm
+
+a = AsyncSniffer(iface="enp5s0d1", filter="icmp")
+a.start()
+for i in tqdm(range(0, 4095)):
+    sendp(
+        Ether(dst="00:02:c9:27:10:73", src="00:f0:cb:ef:e0:3b")
+        / Dot1Q(vlan=i)
+        / IP(dst="10.0.45.45", src="10.0.45.5")
+        / ICMP(id=i),
+        iface="enp2s0",
+        verbose=False,
+    )
+print("Wrapping up and waiting for last packets")
+sleep(1)
+plist = a.stop()
+
+seen = [False for i in range(4095)]
+icmpid = [False for i in range(4095)]
+
+def pprint(seen):
+    last = None
+    s = ""
+    for k, v in enumerate(seen):
+        if v and last is None:
+            last = k
+            s += str(k)
+        if not v and last is not None:
+            if k-1 == last:
+                s += ","
+            else:
+                s += f"-{k-1},"
+            last = None
+    if last is not None and last < k:
+        s += f"-{k}"
+    return s + "\n"
+
+
+for p in plist:
+    if Dot1Q in p:
+        vlan = int(p[Dot1Q].vlan)
+        seen[vlan] = True
+        if ICMP in p and p[ICMP].id == vlan:
+            icmpid[vlan] = True
+
+print("Icmp correspondance")
+print(pprint(icmpid))
+print("Seen vlans")
+print(pprint(seen))