作业/作业5/nack-oriented-reliable-multicast-master/norm-1.5r6/protolib/include/protoPktIP.h
bool IsOptionHeader()
                {
                    switch(ext_type)
                    {
                        case HOPOPT:
                        case DSTOPT:
                            return true;
                        default:
                            return false;
                    }
                }
// _total_ length of extension header in bytes
_total_ length of extension header in bytes
_total_ length of extension header in bytes
bool IsOptionHeader()
                {
                    switch(ext_type)
                    {
                        case HOPOPT:
                        case DSTOPT:
                            return true;
                        default:
                            return false;
                    }
                }
bool IsOptionHeader ( ) { switch ( ext_type ) { case HOPOPT : case DSTOPT : return true ; default : return false ; } }
_total_ length of extension header in bytes
_total_ length of extension header in bytes