added wifi scanner tutorial

Author: x4nth055

Diff for: README.md

@@ -13,6 +13,7 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
         - [Simple Network Scanner](https://www.thepythoncode.com/article/building-network-scanner-using-scapy). ([code](scapy/network-scanner))
         - [Writing a DNS Spoofer](https://www.thepythoncode.com/article/make-dns-spoof-python). ([code](scapy/dns-spoof))
         - [How to Sniff HTTP Packets in the Network using Scapy in Python](https://www.thepythoncode.com/article/sniff-http-packets-scapy-python). ([code](scapy/http-sniffer))
+        - [How to Build a WiFi Scanner in Python using Scapy](https://www.thepythoncode.com/article/building-wifi-scanner-in-python-scapy). ([code](scapy/wifi-scanner))
     - [Writing a Keylogger in Python from Scratch](https://www.thepythoncode.com/article/write-a-keylogger-python). ([code](ethical-hacking/keylogger))
     - [Making a Port Scanner using sockets in Python](https://www.thepythoncode.com/article/make-port-scanner-python). ([code](ethical-hacking/port_scanner))
     - [How to Create a Reverse Shell in Python](https://www.thepythoncode.com/article/create-reverse-shell-python). ([code](ethical-hacking/reverse_shell))

Diff for: scapy/wifi-scanner/README.md

@@ -0,0 +1,7 @@
+# [How to Build a WiFi Scanner in Python using Scapy](https://www.thepythoncode.com/article/building-wifi-scanner-in-python-scapy)
+To run this:
+- `pip3 install -r requirements.txt`
+- Scan nearby networks using `wlan0mon` interface:
+    ```
+    python wifi_scanner.py wlan0mon
+    ```

Diff for: scapy/wifi-scanner/requirements.txt

@@ -0,0 +1,2 @@
+pandas
+scapy

Diff for: scapy/wifi-scanner/wifi_scanner.py

@@ -0,0 +1,60 @@
+from scapy.all import *
+from threading import Thread
+import pandas
+import time
+import os
+
+
+# initialize the networks dataframe that will contain all access points nearby
+networks = pandas.DataFrame(columns=["BSSID", "SSID", "dBm_Signal", "Channel", "Crypto"])
+# set the index BSSID (MAC address of the AP)
+networks.set_index("BSSID", inplace=True)
+
+def callback(packet):
+    if packet.haslayer(Dot11Beacon):
+        # extract the MAC address of the network
+        bssid = packet[Dot11].addr2
+        # get the name of it
+        ssid = packet[Dot11Elt].info.decode()
+        try:
+            dbm_signal = packet.dBm_AntSignal
+        except:
+            dbm_signal = "N/A"
+        # extract network stats
+        stats = packet[Dot11Beacon].network_stats()
+        # get the channel of the AP
+        channel = stats.get("channel")
+        # get the crypto
+        crypto = stats.get("crypto")
+        networks.loc[bssid] = (ssid, dbm_signal, channel, crypto)
+
+
+def print_all():
+    while True:
+        os.system("clear")
+        print(networks)
+        time.sleep(0.5)
+
+
+def change_channel():
+    ch = 1
+    while True:
+        os.system(f"iwconfig {interface} channel {ch}")
+        # switch channel from 1 to 14 each 0.5s
+        ch = ch % 14 + 1
+        time.sleep(0.5)
+
+
+if __name__ == "__main__":
+    # interface name, check using iwconfig
+    interface = "wlan0mon"
+    # start the thread that prints all the networks
+    printer = Thread(target=print_all)
+    printer.daemon = True
+    printer.start()
+    # start the channel changer
+    channel_changer = Thread(target=change_channel)
+    channel_changer.daemon = True
+    channel_changer.start()
+    # start sniffing
+    sniff(prn=callback, iface=interface)