bool IPHeader::testCheckSum() const
{
CheckSum sum;
sum(vhl,tos,len,id,flags_offset,ttl,proto.get(),check_sum,src.get(),dst.get());
return sum.test();
}
bool ICMPEcho::testCheckSum(PtrLen<const uint8> data) const
{
CheckSum sum;
sum(type.get(),code,check_sum,id,num);
sum.add(data);
return sum.test();
}
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();
}