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# $Id: sccp.py 23 2006-11-08 15:45:33Z dugsong $
"""Cisco Skinny Client Control Protocol."""
import dpkt
KEYPAD_BUTTON = 0x00000003
OFF_HOOK = 0x00000006
ON_HOOK = 0x00000007
OPEN_RECEIVE_CHANNEL_ACK= 0x00000022
START_TONE = 0x00000082
STOP_TONE = 0x00000083
SET_LAMP = 0x00000086
SET_SPEAKER_MODE = 0x00000088
START_MEDIA_TRANSMIT = 0x0000008A
STOP_MEDIA_TRANSMIT = 0x0000008B
CALL_INFO = 0x0000008F
DEFINE_TIME_DATE = 0x00000094
DISPLAY_TEXT = 0x00000099
OPEN_RECEIVE_CHANNEL = 0x00000105
CLOSE_RECEIVE_CHANNEL = 0x00000106
SELECT_SOFTKEYS = 0x00000110
CALL_STATE = 0x00000111
DISPLAY_PROMPT_STATUS = 0x00000112
CLEAR_PROMPT_STATUS = 0x00000113
ACTIVATE_CALL_PLANE = 0x00000116
class ActivateCallPlane(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('line_instance', 'I', 0),
)
class CallInfo(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('calling_party_name', '40s', ''),
('calling_party', '24s', ''),
('called_party_name', '40s', ''),
('called_party', '24s', ''),
('line_instance', 'I', 0),
('call_id', 'I', 0),
('call_type', 'I', 0),
('orig_called_party_name', '40s', ''),
('orig_called_party', '24s', '')
)
class CallState(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('call_state', 'I', 12), # 12: Proceed, 15: Connected
('line_instance', 'I', 1),
('call_id', 'I', 0)
)
class ClearPromptStatus(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('line_instance', 'I', 1),
('call_id', 'I', 0)
)
class CloseReceiveChannel(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('conference_id', 'I', 0),
('passthruparty_id', 'I', 0),
)
class DisplayPromptStatus(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('msg_timeout', 'I', 0),
('display_msg', '32s', ''),
('line_instance', 'I', 1),
('call_id', 'I', 0)
)
class DisplayText(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('display_msg', '36s', ''),
)
class KeypadButton(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('button', 'I', 0),
)
class OpenReceiveChannel(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('conference_id', 'I', 0),
('passthruparty_id', 'I', 0),
('ms_packet', 'I', 0),
('payload_capability', 'I', 4), # 4: G.711 u-law 64k
('echo_cancel_type', 'I', 4),
('g723_bitrate', 'I', 0),
)
class OpenReceiveChannelAck(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('channel_status', 'I', 0),
('ip', '4s', ''),
('port', 'I', 0),
('passthruparty_id', 'I', 0),
)
class SelectStartKeys(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('line_id', 'I', 1),
('call_id', 'I', 0),
('softkey_set', 'I', 8),
('softkey_map', 'I', 0xffffffffL)
)
class SetLamp(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('stimulus', 'I', 9), # 9: Line
('stimulus_instance', 'I', 1),
('lamp_mode', 'I', 1),
)
class SetSpeakerMode(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('speaker', 'I', 2), # 2: SpeakerOff
)
class StartMediaTransmission(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('conference_id', 'I', 0),
('passthruparty_id', 'I', 0),
('remote_ip', '4s', ''),
('remote_port', 'I', 0),
('ms_packet', 'I', 0),
('payload_capability', 'I', 4), # 4: G.711 u-law 64k
('precedence', 'I', 0),
('silence_suppression', 'I', 0),
('max_frames_per_pkt', 'I', 1),
('g723_bitrate', 'I', 0),
)
class StartTone(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('tone', 'I', 0x24), # 0x24: AlertingTone
)
class StopMediaTransmission(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('conference_id', 'I', 0),
('passthruparty_id', 'I', 0),
)
class SCCP(dpkt.Packet):
__byte_order__ = '<'
__hdr__ = (
('len', 'I', 0),
('rsvd', 'I', 0),
('msgid', 'I', 0),
('msg', '0s', ''),
)
_msgsw = {
KEYPAD_BUTTON:KeypadButton,
OPEN_RECEIVE_CHANNEL_ACK:OpenReceiveChannelAck,
START_TONE:StartTone,
SET_LAMP:SetLamp,
START_MEDIA_TRANSMIT:StartMediaTransmission,
STOP_MEDIA_TRANSMIT:StopMediaTransmission,
CALL_INFO:CallInfo,
DISPLAY_TEXT:DisplayText,
OPEN_RECEIVE_CHANNEL:OpenReceiveChannel,
CLOSE_RECEIVE_CHANNEL:CloseReceiveChannel,
CALL_STATE:CallState,
DISPLAY_PROMPT_STATUS:DisplayPromptStatus,
CLEAR_PROMPT_STATUS:ClearPromptStatus,
ACTIVATE_CALL_PLANE:ActivateCallPlane,
}
def unpack(self, buf):
dpkt.Packet.unpack(self, buf)
n = self.len - 4
if n > len(self.data):
raise dpkt.NeedData('not enough data')
self.msg, self.data = self.data[:n], self.data[n:]
try:
p = self._msgsw[self.msgid](self.msg)
setattr(self, p.__class__.__name__.lower(), p)
except (KeyError, dpkt.UnpackError):
pass
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