def perform_recv(act, overlapped):
wsabuf = WSABUF()
buf = create_string_buffer(act.len)
wsabuf.buf = cast(buf, c_char_p)
wsabuf.len = act.len
nbytes = c_ulong(0)
flags = c_ulong(0)
act.flags = buf
rc = WSARecv(
act.sock._fd.fileno(), # SOCKET s
byref(wsabuf), # LPWSABUF lpBuffers
1, # DWORD dwBufferCount
byref(nbytes), # LPDWORD lpNumberOfBytesRecvd
byref(flags), # LPDWORD lpFlags
overlapped, # LPWSAOVERLAPPED lpOverlapped
None # LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine
)
return rc, nbytes.value
def perform_accept(act, overlapped):
act.conn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
act.cbuff = create_string_buffer((sizeof(sockaddr_in) + 16) * 2)
nbytes = c_ulong()
prot_info = WSAPROTOCOL_INFO()
prot_info_len = c_int(sizeof(prot_info))
getsockopt(act.sock.fileno(), SOL_SOCKET, SO_PROTOCOL_INFOA, cast(byref(prot_info), c_char_p), byref(prot_info_len))
# BOOL
return AcceptEx(
act.sock._fd.fileno(), # SOCKET sListenSocket
act.conn.fileno(), # SOCKET sAcceptSocket
cast(act.cbuff, c_void_p), # PVOID lpOutputBuffer
0, # DWORD dwReceiveDataLength
prot_info.iMaxSockAddr + 16, # DWORD dwLocalAddressLength
prot_info.iMaxSockAddr + 16, # DWORD dwRemoteAddressLength
nbytes, # LPDWORD lpdwBytesReceived
overlapped # LPOVERLAPPED lpOverlapped
), 0