dn_comp
size = dn_comp(hostname, target + 6, sizeof(target) - 6, NULL, NULL);
int dn_comp(const char *, u_char *, int, u_char **, u_char **);
__weak_reference(__dn_comp, dn_comp);
if ((n = dn_comp(dname, cp, ep - cp - QFIXEDSZ, dnptrs,
n = dn_comp((const char *)data, cp, ep - cp - RRFIXEDSZ,
if ((n = dn_comp(rrecp->r_dname, cp, buflen, dnptrs,
n = dn_comp(buf2, cp, buflen, dnptrs, lastdnptr);
n = dn_comp(buf2, cp, buflen,
n = dn_comp(buf2, cp, buflen, dnptrs, lastdnptr);
n = dn_comp(buf2, cp, buflen, NULL, NULL);
n = dn_comp(buf2, cp, buflen, dnptrs,
n = dn_comp(buf2, cp, buflen, dnptrs, lastdnptr);
n = dn_comp(buf2, cp, buflen, NULL, NULL);
n = dn_comp(buf2, cp, buflen, NULL, NULL);