dns_rdata_tostruct doesn't need a mctx passed to it for SIG (the signer is already expanded at this point). About the only time when mctx is needed is when the structure is to be used after the rdata has been destroyed.
dns_rdata_tostruct doesn't need a mctx passed to it for SIG (the signer is already expanded at this point). About the only time when mctx is needed is when the structure is to be used after the rdata has been destroyed.