IP.py 文件源码

def __init__(self, *args, **kwargs):
        # enable to pass IPv4 addr in human-readable format
        if 'val' in kwargs:
            if 'src' in kwargs['val'] and len(kwargs['val']['src']) != 16:
                try:
                    kwargs['val']['src'] = inet_pton(AF_INET6, kwargs['val']['src'])
                except:
                    pass
            if 'dst' in kwargs['val'] and len(kwargs['val']['dst']) != 16:
                try:
                    kwargs['val']['dst'] = inet_pton(AF_INET6, kwargs['val']['dst'])
                except:
                    pass
        Envelope.__init__(self, *args, **kwargs)
        if 'val' not in kwargs or 'plen' not in kwargs['val']:
            self[3].set_valauto(self._set_plen_val)
        if 'val' not in kwargs or 'next' not in kwargs['val']:
            self[4].set_valauto(self._set_next_val)