void UDPHeader::setCheckSum(IPAddress src,IPAddress dst,IPLen len,PtrLen<const uint8> data)
{
CheckSum sum;
uint16 proto=IP_UDP;
sum(src.get(),dst.get(),proto,len,src_port,dst_port,len);
sum.add(data);
check_sum=sum.complete();
}
bool UDPHeader::testCheckSum(IPAddress src,IPAddress dst,IPLen len,PtrLen<const uint8> data) const
{
if( !check_sum ) return true;
CheckSum sum;
uint16 proto=IP_UDP;
sum(src.get(),dst.get(),proto,len,src_port,dst_port,len,check_sum);
sum.add(data);
return sum.test();
}