57 lines
1.9 KiB
Python
Executable file
57 lines
1.9 KiB
Python
Executable file
# This file is part of Scapy
|
|
# See http://www.secdev.org/projects/scapy for more information
|
|
# Copyright (C) Philippe Biondi <phil@secdev.org>
|
|
# This program is published under a GPLv2 license
|
|
|
|
"""
|
|
RTP (Real-time Transport Protocol).
|
|
|
|
Remember to use::
|
|
|
|
bind_layers(UDP, RTP, dport=XXX)
|
|
|
|
To register the port you are using
|
|
"""
|
|
|
|
from scapy.packet import Packet, bind_layers
|
|
from scapy.fields import BitEnumField, BitField, BitFieldLenField, \
|
|
FieldLenField, FieldListField, IntField, ShortField
|
|
|
|
_rtp_payload_types = {
|
|
# http://www.iana.org/assignments/rtp-parameters
|
|
0: 'G.711 PCMU', 3: 'GSM',
|
|
4: 'G723', 5: 'DVI4',
|
|
6: 'DVI4', 7: 'LPC',
|
|
8: 'PCMA', 9: 'G722',
|
|
10: 'L16', 11: 'L16',
|
|
12: 'QCELP', 13: 'CN',
|
|
14: 'MPA', 15: 'G728',
|
|
16: 'DVI4', 17: 'DVI4',
|
|
18: 'G729', 25: 'CelB',
|
|
26: 'JPEG', 28: 'nv',
|
|
31: 'H261', 32: 'MPV',
|
|
33: 'MP2T', 34: 'H263'}
|
|
|
|
|
|
class RTPExtension(Packet):
|
|
name = "RTP extension"
|
|
fields_desc = [ShortField("header_id", 0),
|
|
FieldLenField("header_len", None, count_of="header", fmt="H"), # noqa: E501
|
|
FieldListField('header', [], IntField("hdr", 0), count_from=lambda pkt: pkt.header_len)] # noqa: E501
|
|
|
|
|
|
class RTP(Packet):
|
|
name = "RTP"
|
|
fields_desc = [BitField('version', 2, 2),
|
|
BitField('padding', 0, 1),
|
|
BitField('extension', 0, 1),
|
|
BitFieldLenField('numsync', None, 4, count_of='sync'),
|
|
BitField('marker', 0, 1),
|
|
BitEnumField('payload_type', 0, 7, _rtp_payload_types),
|
|
ShortField('sequence', 0),
|
|
IntField('timestamp', 0),
|
|
IntField('sourcesync', 0),
|
|
FieldListField('sync', [], IntField("id", 0), count_from=lambda pkt:pkt.numsync)] # noqa: E501
|
|
|
|
|
|
bind_layers(RTP, RTPExtension, extension=1)
|