sldns_buffer_end
if(dname >= sldns_buffer_end(pkt))
if(dname+lablen >= sldns_buffer_end(pkt))
if(dname >= sldns_buffer_end(pkt))
if(dname >= sldns_buffer_end(pkt))
if(dname+lablen >= sldns_buffer_end(pkt))
if(dname >= sldns_buffer_end(pkt))