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