xu_xslen
pos = (char *)rr->rr_v3.xu_xslen - rm->rm_msgbuf;
diff = xlen - XDRALIGN(B(rr->rr_v3.xu_xslen));
pos = (char *)re->re_maddr.xu_xslen - rm->rm_msgbuf;
diff += xlen - XDRALIGN(B(re->re_maddr.xu_xslen));
xu->xu_xslen = (*p)++;
l = B(xu->xu_xslen);
pos = (char *)ra->ra_maddr.xu_xslen - rm->rm_msgbuf;
diff = xlen - XDRALIGN(B(ra->ra_maddr.xu_xslen));
xdr = B(rr->rr_v3.xu_xslen);