macosx-10.10/libresolv-57/res_findzonecut.c

110  * res_findzonecut(res, dname, class, zname, zsize, addrs, naddrs)
111  *	find enclosing zone for a <dname,class>, and some server addresses
114  *	dname - domain name whose enclosing zone is desired
115  *	class - class of dname (and its enclosing zone)
129  *	we start by asking for an SOA<dname,class>.  if we get one as an
130  *	answer, that just means <dname,class> is a zone top, which is fine.
143  *	match our dname (since that would have been returned in the answer
144  *	section).  an authority section SOA has to be "above" our dname.
148  *	ripping labels off the front of our dname -- this is known as "doing
162 res_findzonecut(res_state statp, const char *dname, ns_class class, int opts,
175 	result = res_findzonecut2(statp, dname, class, opts, zname, zsize,
186 res_findzonecut2(res_state statp, const char *dname, ns_class class, int opts,
195 	DPRINTF(("START dname='%s' class=%s, zsize=%ld, naddrs=%d",
196 		 dname, p_class(class), (long)zsize, naddrs));
204 	if ((n = get_soa(statp, dname, class, opts, zname, zsize,
276 get_soa(res_state statp, const char *dname, ns_class class, int opts,
291 	/* First canonicalize dname (exactly one unescaped trailing "."). */
292 	if (ns_makecanon(dname, tname, sizeof tname) < 0)
294 	dname = tname;
299 		while (*dname == '.')
300 			dname++;
303 		n = do_query(statp, dname, class, ns_t_soa, resp, &msg);
306 				 dname, p_class(class), n));
343 				if (ns_samedomain(dname, t) == 0) {
345 						 dname, t));
351 				if (ns_samename(dname, t) == 1 ||
352 				    ns_samedomain(dname, t) == 0) {
354 						 dname, t));
385 		if (*dname == '\0')
389 		while (*dname != '.') {
390 			if (*dname == '\\')
391 				if (*++dname == '\0') {
395 			dname++;
642 find_ns(rrset_ns *nsrrsp, const char *dname) {
646 		if (ns_samename(nsrr->name, dname) == 1)
652 do_query(res_state statp, const char *dname, ns_class class, ns_type qtype,
658 	n = res_nmkquery(statp, ns_o_query, dname, class, qtype,