rr->buffer = snewn(rr->len, char);
sftp_register(req = fxp_read_send(xfer->fh, rr->offset, rr->len));
fxp_set_userdata(req, rr);
rr->buffer = snewn(rr->len, char);
sftp_register(req = fxp_read_send(xfer->fh, rr->offset, rr->len));
fxp_set_userdata(req, rr);