ssdf.py

import ctypes


class cmsghdr0(ctypes.Structure):
    _fields_ = [('cmsg_len', ctypes.c_size_t),
                ('cmsg_level', ctypes.c_int),
                ('cmsg_type', ctypes.c_int)]


class cmsghdr(ctypes.Structure):
    _fields_ = cmsghdr0._fields_ + [('cmsg_data', ctypes.c_ubyte * 4)]


print ctypes.sizeof(cmsghdr0)
print ctypes.sizeof(cmsghdr)

# 16
# 24