netresolv/resolv/res_query.c

109 res_nquery(res_state statp,
121 	oflags = statp->_flags;
126 	if (statp->options & RES_DEBUG)
130 	n = res_nmkquery(statp, QUERY, name, class, type, NULL, 0, NULL,
133 	if (n > 0 && (statp->_flags & RES_F_EDNS0ERR) == 0 &&
134 	    (statp->options & (RES_USE_EDNS0|RES_USE_DNSSEC|RES_NSID)) != 0U) {
135 		n = res_nopt(statp, n, buf, (int)sizeof(buf), anslen);
137 		if (n > 0 && (statp->options & RES_NSID) != 0U) {
138 			n = res_nopt_rdata(statp, n, buf, (int)sizeof(buf),
145 		if (statp->options & RES_DEBUG)
148 		RES_SET_H_ERRNO(statp, NO_RECOVERY);
152 	n = res_nsend(statp, buf, n, answer, anslen);
156 		if ((statp->options & (RES_USE_EDNS0|RES_USE_DNSSEC)) != 0U &&
157 		    ((oflags ^ statp->_flags) & RES_F_EDNS0ERR) != 0) {
158 			statp->_flags |= RES_F_EDNS0ERR;
159 			if (statp->options & RES_DEBUG)
165 		if (statp->options & RES_DEBUG)
168 		RES_SET_H_ERRNO(statp, TRY_AGAIN);
174 		if (statp->options & RES_DEBUG)
183 			RES_SET_H_ERRNO(statp, HOST_NOT_FOUND);
186 			RES_SET_H_ERRNO(statp, TRY_AGAIN);
189 			RES_SET_H_ERRNO(statp, NO_DATA);
195 			RES_SET_H_ERRNO(statp, NO_RECOVERY);
210 res_nsearch(res_state statp,
226 	RES_SET_H_ERRNO(statp, HOST_NOT_FOUND);  /*%< True if we never query. */
235 	if (!dots && (cp = res_hostalias(statp, name, tmp, sizeof tmp))!= NULL)
236 		return (res_nquery(statp, cp, class, type, answer, anslen));
244 	if (dots >= statp->ndots || trailing_dot) {
245 		ret = res_nquerydomain(statp, name, NULL, class, type,
249 		saved_herrno = statp->res_h_errno;
259 	if ((!dots && (statp->options & RES_DEFNAMES) != 0U) ||
260 	    (dots && !trailing_dot && (statp->options & RES_DNSRCH) != 0U)) {
263 		for (domain = (const char * const *)statp->dnsrch;
272 			ret = res_nquerydomain(statp, name, *domain,
292 				RES_SET_H_ERRNO(statp, TRY_AGAIN);
296 			switch (statp->res_h_errno) {
318 			if ((statp->options & RES_DNSRCH) == 0U)
327 	if ((dots || !searched || (statp->options & RES_NOTLDQUERY) == 0U) &&
329 		ret = res_nquerydomain(statp, name, NULL, class, type,
343 		RES_SET_H_ERRNO(statp, saved_herrno);
345 		RES_SET_H_ERRNO(statp, NO_DATA);
347 		RES_SET_H_ERRNO(statp, TRY_AGAIN);
356 res_nquerydomain(res_state statp,
368 	if (statp->options & RES_DEBUG)
379 			RES_SET_H_ERRNO(statp, NO_RECOVERY);
391 			RES_SET_H_ERRNO(statp, NO_RECOVERY);
396 	return (res_nquery(statp, longname, class, type, answer, anslen));
400 res_hostalias(const res_state statp, const char *name, char *dst, size_t siz) {
405 	if (statp->options & RES_NOALIASES)