It is designed to allow fast packet prototyping by using default values that work. It is able to forge or decode packets of a wide number of protocols, send them on the wire, capture them, store or read them using pcap files, match requests and replies, and much more. Sniff(iface=args. Scapy is a powerful Python-based interactive packet manipulation program and library. Parser.add_argument('-t', "-testfile", help="parse test file (optional)") Parser.add_argument('-o', "-outfile", help="output file (optional)") Parser.add_argument('-f', '-filter', default="udp and port 5060", help="filter to be used in scapy") Parser.add_argument('-i', "-interface", default="eth0", help="interface to use for sniffing") Arguments: -i -f -o Interface defaults to 'eth0' and filter defaults to 'udp and port 5060'") Parser = argparse.ArgumentParser(description="rtp replay script. Ip_attributes=0 #Zero is handled by scapy on send by default Payload = payload.replace("Raw(load=b\'", '', 1) Payload = re.sub("Contact\.*>", BUSY_2, payload,1) Payload = payload.replace("SIP/2.0 180 Ringing", BUSY_1, 1) This is the code so far: from scapy.all import sniff, Ether, IP, UDP, sendp, ICMP, rdpcap,RawīUSY_2 = 'X-Asterisk-HangupCause: Call Rejected\\\\r\\ The packet displayed in wireshark is the following: This is a correct packet format captured on the network.
Instead they are included as strings as shown in the cmd and wireshark screenshots below. When I send the modified payload in the Raw section the \r and \n parts of the message are not interpreted as special characters.
I am using python3 and scapy to modify and resend a captured packet.
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