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-rw-r--r--scripts/external_libs/dpkt-1.8.6/dpkt/h225.py217
1 files changed, 217 insertions, 0 deletions
diff --git a/scripts/external_libs/dpkt-1.8.6/dpkt/h225.py b/scripts/external_libs/dpkt-1.8.6/dpkt/h225.py
new file mode 100644
index 00000000..a8fe2cbe
--- /dev/null
+++ b/scripts/external_libs/dpkt-1.8.6/dpkt/h225.py
@@ -0,0 +1,217 @@
+# $Id: h225.py 23 2006-11-08 15:45:33Z dugsong $
+
+"""ITU-T H.225.0 Call Signaling."""
+
+import dpkt, tpkt
+import struct
+
+# H225 Call Signaling
+#
+# Call messages and information elements (IEs) are defined by Q.931:
+# http://cvsup.de.openbsd.org/historic/comp/doc/standards/itu/Q/Q.931.ps.gz
+#
+# The User-to-User IEs of H225 are encoded by PER of ASN.1.
+
+# Call Establishment Messages
+ALERTING = 1
+CALL_PROCEEDING = 2
+CONNECT = 7
+CONNECT_ACKNOWLEDGE = 15
+PROGRESS = 3
+SETUP = 5
+SETUP_ACKNOWLEDGE = 13
+
+# Call Information Phase Messages
+RESUME = 38
+RESUME_ACKNOWLEDGE = 46
+RESUME_REJECT = 34
+SUSPEND = 37
+SUSPEND_ACKNOWLEDGE = 45
+SUSPEND_REJECT = 33
+USER_INFORMATION = 32
+
+# Call Clearing Messages
+DISCONNECT = 69
+RELEASE = 77
+RELEASE_COMPLETE = 90
+RESTART = 70
+RESTART_ACKNOWLEDGE = 78
+
+# Miscellaneous Messages
+SEGMENT = 96
+CONGESTION_CONTROL = 121
+INFORMATION = 123
+NOTIFY = 110
+STATUS = 125
+STATUS_ENQUIRY = 117
+
+# Type 1 Single Octet Information Element IDs
+RESERVED = 128
+SHIFT = 144
+CONGESTION_LEVEL = 176
+REPEAT_INDICATOR = 208
+
+# Type 2 Single Octet Information Element IDs
+MORE_DATA = 160
+SENDING_COMPLETE = 161
+
+# Variable Length Information Element IDs
+SEGMENTED_MESSAGE = 0
+BEARER_CAPABILITY = 4
+CAUSE = 8
+CALL_IDENTITY = 16
+CALL_STATE = 20
+CHANNEL_IDENTIFICATION = 24
+PROGRESS_INDICATOR = 30
+NETWORK_SPECIFIC_FACILITIES = 32
+NOTIFICATION_INDICATOR = 39
+DISPLAY = 40
+DATE_TIME = 41
+KEYPAD_FACILITY = 44
+SIGNAL = 52
+INFORMATION_RATE = 64
+END_TO_END_TRANSIT_DELAY = 66
+TRANSIT_DELAY_SELECTION_AND_INDICATION = 67
+PACKET_LAYER_BINARY_PARAMETERS = 68
+PACKET_LAYER_WINDOW_SIZE = 69
+PACKET_SIZE = 70
+CLOSED_USER_GROUP = 71
+REVERSE_CHARGE_INDICATION = 74
+CALLING_PARTY_NUMBER = 108
+CALLING_PARTY_SUBADDRESS = 109
+CALLED_PARTY_NUMBER = 112
+CALLED_PARTY_SUBADDRESS = 113
+REDIRECTING_NUMBER = 116
+TRANSIT_NETWORK_SELECTION = 120
+RESTART_INDICATOR = 121
+LOW_LAYER_COMPATIBILITY = 124
+HIGH_LAYER_COMPATIBILITY = 125
+USER_TO_USER = 126
+ESCAPE_FOR_EXTENSION = 127
+
+class H225(dpkt.Packet):
+ __hdr__ = (
+ ('proto', 'B', 8),
+ ('ref_len', 'B', 2)
+ )
+
+ def unpack(self, buf):
+ # TPKT header
+ self.tpkt = tpkt.TPKT(buf)
+ if self.tpkt.v != 3:
+ raise dpkt.UnpackError('invalid TPKT version')
+ if self.tpkt.rsvd != 0:
+ raise dpkt.UnpackError('invalid TPKT reserved value')
+ n = self.tpkt.len - self.tpkt.__hdr_len__
+ if n > len(self.tpkt.data):
+ raise dpkt.UnpackError('invalid TPKT length')
+ buf = self.tpkt.data
+
+ # Q.931 payload
+ dpkt.Packet.unpack(self, buf)
+ buf = buf[self.__hdr_len__:]
+ self.ref_val = buf[:self.ref_len]
+ buf = buf[self.ref_len:]
+ self.type = struct.unpack('B', buf[:1])[0]
+ buf = buf[1:]
+
+ # Information Elements
+ l = []
+ while buf:
+ ie = self.IE(buf)
+ l.append(ie)
+ buf = buf[len(ie):]
+ self.data = l
+
+ def __len__(self):
+ return self.tpkt.__hdr_len__ + \
+ self.__hdr_len__ + \
+ sum(map(len, self.data))
+
+ def __str__(self):
+ return self.tpkt.pack_hdr() + \
+ self.pack_hdr() + \
+ self.ref_val + \
+ struct.pack('B', self.type) + \
+ ''.join(map(str, self.data))
+
+ class IE(dpkt.Packet):
+ __hdr__ = (
+ ('type', 'B', 0),
+ )
+
+ def unpack(self, buf):
+ dpkt.Packet.unpack(self, buf)
+ buf = buf[self.__hdr_len__:]
+
+ # single-byte IE
+ if self.type & 0x80:
+ self.len = 0
+ self.data = None
+ # multi-byte IE
+ else:
+ # special PER-encoded UUIE
+ if self.type == USER_TO_USER:
+ self.len = struct.unpack('>H', buf[:2])[0]
+ buf = buf[2:]
+ # normal TLV-like IE
+ else:
+ self.len = struct.unpack('B', buf[:1])[0]
+ buf = buf[1:]
+ self.data = buf[:self.len]
+
+ def __len__(self):
+ if self.type & 0x80:
+ n = 0
+ else:
+ if self.type == USER_TO_USER:
+ n = 2
+ else:
+ n = 1
+ return self.__hdr_len__ + \
+ self.len \
+ + n
+
+ def __str__(self):
+ if self.type & 0x80:
+ length_str = None
+ else:
+ if self.type == USER_TO_USER:
+ length_str = struct.pack('>H', self.len)
+ else:
+ length_str = struct.pack('B', self.len)
+ return struct.pack('B', self.type) + \
+ length_str + \
+ self.data
+
+
+if __name__ == '__main__':
+ import unittest
+
+ class H225TestCase(unittest.TestCase):
+ def testPack(self):
+ h = H225(self.s)
+ self.failUnless(self.s == str(h))
+
+ def testUnpack(self):
+ h = H225(self.s)
+ self.failUnless(h.tpkt.v == 3)
+ self.failUnless(h.tpkt.rsvd == 0)
+ self.failUnless(h.tpkt.len == 1041)
+ self.failUnless(h.proto == 8)
+ self.failUnless(h.type == SETUP)
+ self.failUnless(len(h.data) == 3)
+
+ ie = h.data[0]
+ self.failUnless(ie.type == BEARER_CAPABILITY)
+ self.failUnless(ie.len == 3)
+ ie = h.data[1]
+ self.failUnless(ie.type == DISPLAY)
+ self.failUnless(ie.len == 14)
+ ie = h.data[2]
+ self.failUnless(ie.type == USER_TO_USER)
+ self.failUnless(ie.len == 1008)
+
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+
+ unittest.main()