mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-23 14:58:09 +00:00
130 lines
3.9 KiB
Python
130 lines
3.9 KiB
Python
# This file is part of the TREZOR project.
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#
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# Copyright (C) 2012-2016 Marek Palatinus <slush@satoshilabs.com>
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# Copyright (C) 2012-2016 Pavol Rusnak <stick@satoshilabs.com>
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this library. If not, see <http://www.gnu.org/licenses/>.
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import os
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import socket
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from ..protocol_v1 import ProtocolV1
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from ..protocol_v2 import ProtocolV2
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from . import Transport, TransportException
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class UdpTransport(Transport):
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DEFAULT_HOST = '127.0.0.1'
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DEFAULT_PORT = 21324
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PATH_PREFIX = 'udp'
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def __init__(self, device=None, protocol=None):
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super(UdpTransport, self).__init__()
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if not device:
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host = UdpTransport.DEFAULT_HOST
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port = UdpTransport.DEFAULT_PORT
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else:
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devparts = device.split(':')
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host = devparts[0]
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port = int(devparts[1]) if len(devparts) > 1 else UdpTransport.DEFAULT_PORT
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if not protocol:
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protocol = ProtocolV1()
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self.device = (host, port)
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self.protocol = protocol
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self.socket = None
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def get_path(self):
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return "%s:%s:%s" % ((self.PATH_PREFIX,) + self.device)
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def find_debug(self):
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host, port = self.device
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return UdpTransport('{}:{}'.format(host, port + 1), self.protocol)
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@classmethod
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def _try_path(cls, path):
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d = cls(path)
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try:
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d.open()
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if d._ping():
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return d
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else:
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raise TransportException('No TREZOR device found at address {}'.format(path))
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finally:
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d.close()
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@classmethod
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def enumerate(cls):
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default_path = '{}:{}'.format(cls.DEFAULT_HOST, cls.DEFAULT_PORT)
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try:
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return [cls._try_path(default_path)]
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except TransportException:
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return []
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@classmethod
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def find_by_path(cls, path, prefix_search=False):
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if prefix_search:
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return super().find_by_path(path, prefix_search)
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else:
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path = path.replace('{}:'.format(cls.PATH_PREFIX), '')
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return cls._try_path(path)
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def open(self):
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self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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self.socket.connect(self.device)
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self.socket.settimeout(10)
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self.protocol.session_begin(self)
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def close(self):
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if self.socket:
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self.protocol.session_end(self)
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self.socket.close()
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self.socket = None
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def _ping(self):
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'''Test if the device is listening.'''
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resp = None
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try:
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self.socket.sendall(b'PINGPING')
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resp = self.socket.recv(8)
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except:
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pass
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return resp == b'PONGPONG'
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def read(self):
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return self.protocol.read(self)
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def write(self, msg):
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return self.protocol.write(self, msg)
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def write_chunk(self, chunk):
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if len(chunk) != 64:
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raise TransportException('Unexpected data length')
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self.socket.sendall(chunk)
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def read_chunk(self):
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while True:
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try:
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chunk = self.socket.recv(64)
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break
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except socket.timeout:
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continue
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if len(chunk) != 64:
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raise TransportException('Unexpected chunk size: %d' % len(chunk))
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return bytearray(chunk)
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TRANSPORT = UdpTransport
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