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import socket, ssl, threading, struct
protocolVer = 1
sock = None
authed = False
sessionKey = b'\0'*16
nextID = 1
lastReceivedPacketID = 0
packetCache = []
packetLock = threading.Lock()
class Packet:
def __init__(self, type, data):
global nextID
self.type = type
self.data = data
if (type & 0x8000) == 0:
self.id = nextID
nextID = nextID + 1
def sendOverWire(self):
header = struct.pack('<HHI', self.type, 0, len(self.data))
if (self.type & 0x8000) == 0:
extHeader = struct.pack('<II', self.id, lastReceivedPacketID)
else:
extHeader = b''
sock.sendall(header)
if extHeader:
sock.sendall(extHeader)
sock.sendall(self.data)
def clearCachedPackets(pid):
for packet in packetCache[:]:
if packet.id <= pid:
packetCache.remove(packet)
def reader():
global lastReceivedPacketID, authed, sessionKey
readbuf = b''
print('(Connected)')
while True:
data = sock.recv(1024)
if not data:
print('(Disconnected)')
break
readbuf += data
pos = 0
bufsize = len(readbuf)
print('[bufsize: %d]' % bufsize)
while True:
if (pos + 8) > bufsize:
break
type, reserved, size = struct.unpack_from('<HHI', readbuf, pos)
extHeaderSize = 8 if ((type & 0x8000) == 0) else 0
if (pos + 8 + extHeaderSize + size) > bufsize:
break
pos += 8
with packetLock:
if ((type & 0x8000) == 0):
pid, lastReceivedByServer = struct.unpack_from('<II', readbuf, pos)
pos += 8
lastReceivedPacketID = pid
clearCachedPackets(lastReceivedByServer)
packetdata = readbuf[pos:pos+size]
print('0x%x : %d bytes : %s' % (type, size, packetdata))
if type == 0x8001:
sessionKey = packetdata
authed = True
elif type == 0x8003:
authed = True
pid = struct.unpack('<I', packetdata)[0]
clearCachedPackets(pid)
try:
for packet in packetCache:
packet.sendOverWire()
except:
pass
elif type == 1:
strlen = struct.unpack_from('<I', packetdata, 0)[0]
print(packetdata[4:4+strlen].decode('utf-8'))
pos += size
print('[processed %d bytes]' % pos)
readbuf = readbuf[pos:]
def writePacket(type, data, allowUnauthed=False):
packet = Packet(type, data)
if (type & 0x8000) == 0:
packetCache.append(packet)
try:
if authed or allowUnauthed:
packet.sendOverWire()
except:
pass
while True:
bit = input()
bits = bit.split(' ', 1)
cmd = bits[0]
with packetLock:
print('{')
if cmd == 'connect':
try:
basesock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
basesock.connect(('localhost', 5454))
#sock = ssl.wrap_socket(basesock)
sock = basesock
thd = threading.Thread(None, reader)
thd.start()
except Exception as e:
print(e)
elif cmd == 'disconnect':
sock.shutdown(socket.SHUT_RDWR)
sock.close()
sock = None
authed = False
elif cmd == 'login':
writePacket(0x8001, struct.pack('<II 16s', protocolVer, lastReceivedPacketID, sessionKey), True)
elif cmd == 'cmd':
data = bits[1].encode('utf-8')
writePacket(1, struct.pack('<I', len(data)) + data)
elif cmd == 'quit':
break
print('}')
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