socks握手时的bufio会吞掉客户端流水线发送的首段payload，进而导致UoT v2客户端的每条流都会失败 #113

import socket, struct, time

MAGIC = b'sp.v2.udp-over-tcp.arpa'
greeting = bytes([5, 1, 0])
connect = bytes([5, 1, 0, 3, len(MAGIC)]) + MAGIC + b'\x00\x00'
uot_request = bytes([1, 1, 192, 168, 1, 1, 0x75, 0x3A])   # isConnect, ATYP=IPv4, addr, port
frame = struct.pack('>H', 8) + b'WFE1\x00\x00\x00\x01'

s = socket.create_connection(('127.0.0.1', 1080))   # sing-box v1.14.2 SOCKS5 Listen
s.sendall(greeting + connect + uot_request + frame)
time.sleep(1)
s.close()