mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-18 05:28:40 +00:00
70 lines
2.3 KiB
Python
70 lines
2.3 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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'''UDP Socket implementation of Transport.'''
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import socket
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from select import select
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from .transport import TransportV2, ConnectionError
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class UdpTransport(TransportV2):
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def __init__(self, device, *args, **kwargs):
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device = device.split(':')
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if len(device) < 2:
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if not device[0]:
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# Default port used by trezor v2
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device = ('127.0.0.1', 21324)
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else:
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device = ('127.0.0.1', int(device[0]))
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else:
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device = (device[0], int(device[1]))
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self.socket = None
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super(UdpTransport, self).__init__(device, *args, **kwargs)
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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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def _close(self):
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self.socket.close()
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self.socket = None
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def _ready_to_read(self):
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rlist, _, _ = select([self.socket], [], [], 0)
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return len(rlist) > 0
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def _write_chunk(self, chunk):
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if len(chunk) != 64:
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raise Exception("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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data = 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(data) != 64:
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raise Exception("Unexpected chunk size: %d" % len(data))
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return bytearray(data)
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