RSVAL
int nbt_len = RSVAL(data,2);
int name_trn_id = RSVAL(data,0);
int qdcount = RSVAL(data,4);
int ancount = RSVAL(data,6);
int nscount = RSVAL(data,8);
int arcount = RSVAL(data,10);
restype = RSVAL(p,0);
rdlen = RSVAL(p,0);
uint16 l = RSVAL(buf, ofs) & 0x3FFF;
unsigned int x = reverse?RSVAL(buf,0):SVAL(buf,0);
unsigned int x = reverse?RSVAL(buf,0):SVAL(buf,0);