From 47f34e486b76976a7f348fd99479858ef650a729 Mon Sep 17 00:00:00 2001
From: David Westgate <djw2@pdx.edu>
Date: Thu, 13 Jun 2024 14:05:05 -0700
Subject: [PATCH] update rtp script

---
 final/scripts/rtp1.py | 65 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 final/scripts/rtp1.py

diff --git a/final/scripts/rtp1.py b/final/scripts/rtp1.py
new file mode 100644
index 0000000..8024f66
--- /dev/null
+++ b/final/scripts/rtp1.py
@@ -0,0 +1,65 @@
+import sys
+from scapy.all import sniff, send, IP, IPv6, Packet, Raw, Ether, sendp, base64_bytes, hex_bytes,bytes_base64
+from scapy.layers.inet import UDP
+from scapy.layers.rtp import RTP, bind_layers
+from datetime import datetime
+
+def invert_byte(byte):
+    return ~byte & 0xFF
+
+def modify_packet(packet: Packet):
+    global modifications
+    global seen
+
+
+    udp: Packet = packet[UDP]
+    # udp.show()
+    if RTP in udp:
+        rtp: Packet = udp[RTP]
+        # load: bytes = rtp.load
+        if rtp.payload_type == 96:
+            print("96")
+            # payload: bytes = rtp.payload.load
+            # pretty = bytes_base64(payload)
+            # print(payload)
+            # hex: str = payload.hex()
+            # new_hex = hex[::-1]
+            # print(hex)
+            # print()
+            # print(new_hex)
+            # print(type(new_payload))
+            # rtp.payload = Raw(hex_bytes(new_hex))
+            original_payload = bytes(rtp.payload)
+            new_payload_hex = "deadbeef"  # New payload in hex format
+            new_payload = bytes.fromhex(new_payload_hex)
+            rtp.payload = Raw(new_payload)
+            udp.len = len(udp)
+            udp.chksum = None  # Recalculate checksum
+            # payload[6] = invert_byte(payload[6])
+        else:
+            print('npe')
+
+
+
+    seen += 1
+    sendp(packet, iface=sys.argv[1])
+
+
+if __name__ == "__main__":
+    modifications = 0
+    seen = 0
+    if len(sys.argv) != 2:
+        print(f"Usage: {sys.argv[0]} <interface>")
+        sys.exit(1)
+
+    interface = sys.argv[1]
+
+    start_time = datetime.now()
+    print(f"Script started at: {start_time.strftime('%Y-%m-%d %H:%M:%S')}")
+    bind_layers(UDP, RTP, sport=6970)
+    packets = sniff(filter="udp port 6970", iface=interface, timeout=60*1, prn=modify_packet)
+
+    end_time = datetime.now()
+    print(f"Script ended at: {end_time.strftime('%Y-%m-%d %H:%M:%S')}")
+    print(f"{modifications} ip(v6) packets modified")
+    print(f"{seen} total ip(v6) packets seen")
\ No newline at end of file