mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-18 13:38:12 +00:00
52 lines
1.4 KiB
Python
52 lines
1.4 KiB
Python
'''UDP Socket implementation of Transport.'''
|
|
|
|
import socket
|
|
from select import select
|
|
from .transport import TransportV2, ConnectionError
|
|
|
|
class UdpTransport(TransportV2):
|
|
def __init__(self, device, *args, **kwargs):
|
|
device = device.split(':')
|
|
if len(device) < 2:
|
|
if not device[0]:
|
|
# Default port used by trezor v2
|
|
device = ('127.0.0.1', 21324)
|
|
else:
|
|
device = ('127.0.0.1', int(device[0]))
|
|
else:
|
|
device = (device[0], int(device[1]))
|
|
|
|
self.socket = None
|
|
super(UdpTransport, self).__init__(device, *args, **kwargs)
|
|
|
|
def _open(self):
|
|
self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
|
|
self.socket.connect(self.device)
|
|
self.socket.settimeout(10)
|
|
|
|
def _close(self):
|
|
self.socket.close()
|
|
self.socket = None
|
|
|
|
def _ready_to_read(self):
|
|
rlist, _, _ = select([self.socket], [], [], 0)
|
|
return len(rlist) > 0
|
|
|
|
def _write_chunk(self, chunk):
|
|
if len(chunk) != 64:
|
|
raise Exception("Unexpected data length")
|
|
|
|
self.socket.sendall(chunk)
|
|
|
|
def _read_chunk(self):
|
|
while True:
|
|
try:
|
|
data = self.socket.recv(64)
|
|
break
|
|
except socket.timeout:
|
|
continue
|
|
if len(data) != 64:
|
|
raise Exception("Unexpected chunk size: %d" % len(data))
|
|
|
|
return bytearray(data)
|