Error writing scapy RTP packet with payload type to pcap

问题:

When I create an RTP packet in scapy with the following code, I get an error: "TypeError: clone_with() got multiple values for keyword argument 'payload'"

from scapy.all import IP, UDP, RTP, Ether from scapy.utils import PcapWriter  pktdump = PcapWriter("banana.pcap", append=False, sync=True)  rtp = {          "sequence": 1,         "timestamp": 1,         "marker": 1,         "payload": 17     }  pkt = Ether()/IP()/UDP(sport=12345,dport=12346)/RTP(**rtp) pktdump.write(pkt) 

but removing payload works.

rtp = {          "sequence": 1,         "timestamp": 1,         "marker": 1     }  pkt = Ether()/IP()/UDP(sport=12345,dport=12346)/RTP(**rtp) pktdump.write(pkt) 

The full output is

Traceback (most recent call last):   File "test.py", line 23, in <module>     pktdump.write(pkt)   File "/home/eisamar/devel/rtp2pcap/local/lib/python2.7/site-packages/scapy/utils.py", line 657, in write     for p in pkt:   File "/home/eisamar/devel/rtp2pcap/local/lib/python2.7/site-packages/scapy/packet.py", line 661, in loop     for payl in payloads:   File "/home/eisamar/devel/rtp2pcap/local/lib/python2.7/site-packages/scapy/packet.py", line 661, in loop     for payl in payloads:   File "/home/eisamar/devel/rtp2pcap/local/lib/python2.7/site-packages/scapy/packet.py", line 654, in loop     for x in loop(todo[:], done):   File "/home/eisamar/devel/rtp2pcap/local/lib/python2.7/site-packages/scapy/packet.py", line 654, in loop     for x in loop(todo[:], done):   File "/home/eisamar/devel/rtp2pcap/local/lib/python2.7/site-packages/scapy/packet.py", line 661, in loop     for payl in payloads:   File "/home/eisamar/devel/rtp2pcap/local/lib/python2.7/site-packages/scapy/packet.py", line 654, in loop     for x in loop(todo[:], done):   File "/home/eisamar/devel/rtp2pcap/local/lib/python2.7/site-packages/scapy/packet.py", line 654, in loop     for x in loop(todo[:], done):   File "/home/eisamar/devel/rtp2pcap/local/lib/python2.7/site-packages/scapy/packet.py", line 654, in loop     for x in loop(todo[:], done):   File "/home/eisamar/devel/rtp2pcap/local/lib/python2.7/site-packages/scapy/packet.py", line 654, in loop     for x in loop(todo[:], done):   File "/home/eisamar/devel/rtp2pcap/local/lib/python2.7/site-packages/scapy/packet.py", line 666, in loop     pkt = self.clone_with(payload=payl, **done2) TypeError: clone_with() got multiple values for keyword argument 'payload' 

What am I doing wrong...? Is there a workaround? The error is on line 666... hmm...

Thanks!

回答1:

Changing the line suggested in https://bitbucket.org/secdev/scapy/pull-requests/110/changed-rtp-field-name-from-payload-to fixes the problem by changing the name of the field from payload to payload_type.

文章来源: Error writing scapy RTP packet with payload type to pcap