ospf.py 文件源码

def serialize(self, payload=None, prev=None):
        tail = self.serialize_tail()
        self.length = self._HDR_LEN + len(tail)
        head = bytearray(struct.pack(self._HDR_PACK_STR, self.version,
                         self.type_, self.length,
                         addrconv.ipv4.text_to_bin(self.router_id),
                         addrconv.ipv4.text_to_bin(self.area_id), 0,
                         self.au_type, self.authentication))
        buf = head + tail
        csum = packet_utils.checksum(buf[:12] + buf[14:16] +
                                     buf[self._HDR_LEN:])
        self.checksum = csum
        struct.pack_into("!H", buf, 12, csum)
        return buf

# alias