kamp/python-broadlink
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Add packet retransmission and timeout

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UDP doesn't guarantee delivery, so reattempt packet transmission if we don't
get a response and timeout if we still don't have anything after (by
default) 10 seconds.
This commit is contained in:
Matthew Garrett 2016-11-20 11:16:28 -08:00
parent 7ac243b838
commit d066513d02
1 changed files with 13 additions and 3 deletions
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16
broadlink/__init__.py
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@ -124,9 +124,10 @@ def discover(timeout=None):
devices.append(dev)
class device:
def __init__(self, host, mac):
def __init__(self, host, mac, timeout=10):
self.host = host
self.mac = mac
self.timeout = timeout
self.count = random.randrange(0xffff)
self.key = bytearray([0x09, 0x76, 0x28, 0x34, 0x3f, 0xe9, 0x9e, 0x23, 0x76, 0x5c, 0x15, 0x13, 0xac, 0xcf, 0x8b, 0x02])
self.iv = bytearray([0x56, 0x2e, 0x17, 0x99, 0x6d, 0x09, 0x3d, 0x28, 0xdd, 0xb3, 0xba, 0x69, 0x5a, 0x2e, 0x6f, 0x58])
@ -221,8 +222,17 @@ class device:
packet[0x20] = checksum & 0xff
packet[0x21] = checksum >> 8
self.cs.sendto(packet, self.host)
response = self.cs.recvfrom(1024)
starttime = time.time()
while True:
try:
self.cs.sendto(packet, self.host)
self.cs.settimeout(1)
response = self.cs.recvfrom(1024)
break
except socket.timeout:
if (time.time() - starttime) < self.timeout:
pass
raise
return response[0]