mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-10-13 11:29:11 +00:00
54f1599a5a
This clarifies the intent: the project is licenced under terms of LGPL version 3 only, but the standard headers cover only "3 or later", so we had to rewrite them. In the same step, we removed author information from individual files in favor of "SatoshiLabs and contributors", and include an AUTHORS file that lists the contributors. Apologies to those whose names are missing; please contact us if you wish to add your info to the AUTHORS file.
128 lines
3.7 KiB
Python
128 lines
3.7 KiB
Python
# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2018 SatoshiLabs and contributors
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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 version 3
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# as published by the Free Software Foundation.
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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 License along with this library.
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# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
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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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