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| ## This file is part of Scapy
| ## See http://www.secdev.org/projects/scapy for more informations
| ## Copyright (C) Philippe Biondi <phil@secdev.org>
| ## This program is published under a GPLv2 license
|
| """
| RTP (Real-time Transport Protocol).
| """
|
| from scapy.packet import *
| from scapy.fields import *
|
| _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"),
| FieldListField('header', [], IntField("hdr", 0), count_from=lambda pkt: pkt.header_len) ]
|
|
| 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) ]
|
| bind_layers(RTP, RTPExtension, extension=1)
|
|
