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