/usr/lib/python2.7/dist-packages/dpkt/rtp.py is in python-dpkt 1.8.r98-0.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | # $Id: rtp.py 23 2006-11-08 15:45:33Z dugsong $
"""Real-Time Transport Protocol"""
from dpkt import Packet
# version 1100 0000 0000 0000 ! 0xC000 14
# p 0010 0000 0000 0000 ! 0x2000 13
# x 0001 0000 0000 0000 ! 0x1000 12
# cc 0000 1111 0000 0000 ! 0x0F00 8
# m 0000 0000 1000 0000 ! 0x0080 7
# pt 0000 0000 0111 1111 ! 0x007F 0
#
_VERSION_MASK= 0xC000
_P_MASK = 0x2000
_X_MASK = 0x1000
_CC_MASK = 0x0F00
_M_MASK = 0x0080
_PT_MASK = 0x007F
_VERSION_SHIFT=14
_P_SHIFT = 13
_X_SHIFT = 12
_CC_SHIFT = 8
_M_SHIFT = 7
_PT_SHIFT = 0
VERSION = 2
class RTP(Packet):
__hdr__ = (
('_type', 'H', 0x8000),
('seq', 'H', 0),
('ts', 'I', 0),
('ssrc', 'I', 0),
)
csrc = ''
def _get_version(self): return (self._type&_VERSION_MASK)>>_VERSION_SHIFT
def _set_version(self, ver):
self._type = (ver << _VERSION_SHIFT) | (self._type & ~_VERSION_MASK)
def _get_p(self): return (self._type & _P_MASK) >> _P_SHIFT
def _set_p(self, p): self._type = (p << _P_SHIFT) | (self._type & ~_P_MASK)
def _get_x(self): return (self._type & _X_MASK) >> _X_SHIFT
def _set_x(self, x): self._type = (x << _X_SHIFT) | (self._type & ~_X_MASK)
def _get_cc(self): return (self._type & _CC_MASK) >> _CC_SHIFT
def _set_cc(self, cc): self._type = (cc<<_CC_SHIFT)|(self._type&~_CC_MASK)
def _get_m(self): return (self._type & _M_MASK) >> _M_SHIFT
def _set_m(self, m): self._type = (m << _M_SHIFT) | (self._type & ~_M_MASK)
def _get_pt(self): return (self._type & _PT_MASK) >> _PT_SHIFT
def _set_pt(self, m): self._type = (m << _PT_SHIFT)|(self._type&~_PT_MASK)
version = property(_get_version, _set_version)
p = property(_get_p, _set_p)
x = property(_get_x, _set_x)
cc = property(_get_cc, _set_cc)
m = property(_get_m, _set_m)
pt = property(_get_pt, _set_pt)
def __len__(self):
return self.__hdr_len__ + len(self.csrc) + len(self.data)
def __str__(self):
return self.pack_hdr() + self.csrc + str(self.data)
def unpack(self, buf):
super(RTP, self).unpack(buf)
self.csrc = buf[self.__hdr_len__:self.__hdr_len__ + self.cc * 4]
self.data = buf[self.__hdr_len__ + self.cc * 4:]
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