GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/asr/res_mkquery.c Lines: 0 42 0.0 %
Date: 2017-11-13 Branches: 0 32 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: res_mkquery.c,v 1.11 2017/02/27 11:38:08 jca Exp $	*/
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/*
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 * Copyright (c) 2012 Eric Faurot <eric@openbsd.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/nameser.h> /* for MAXDNAME */
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#include <netdb.h>
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#include <asr.h>
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#include <errno.h>
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#include <resolv.h>
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#include <string.h>
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#include "asr_private.h"
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/* This function is apparently needed by some ports. */
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int
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res_mkquery(int op, const char *dname, int class, int type,
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    const unsigned char *data, int datalen, const unsigned char *newrr,
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    unsigned char *buf, int buflen)
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{
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	struct asr_ctx		*ac;
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	struct asr_pack		 p;
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	struct asr_dns_header	 h;
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	char			 fqdn[MAXDNAME];
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	char			 dn[MAXDNAME];
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	/* we currently only support QUERY */
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	if (op != QUERY || data)
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		return (-1);
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	if (dname[0] == '\0' || dname[strlen(dname) - 1] != '.') {
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		if (strlcpy(fqdn, dname, sizeof(fqdn)) >= sizeof(fqdn) ||
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		    strlcat(fqdn, ".", sizeof(fqdn)) >= sizeof(fqdn))
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			return (-1);
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		dname = fqdn;
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	}
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	if (_asr_dname_from_fqdn(dname, dn, sizeof(dn)) == -1)
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		return (-1);
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	ac = _asr_use_resolver(NULL);
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	memset(&h, 0, sizeof h);
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	h.id = res_randomid();
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	if (ac->ac_options & RES_RECURSE)
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		h.flags |= RD_MASK;
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	h.qdcount = 1;
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	if (ac->ac_options & (RES_USE_EDNS0 | RES_USE_DNSSEC))
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		h.arcount = 1;
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	_asr_pack_init(&p, buf, buflen);
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	_asr_pack_header(&p, &h);
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	_asr_pack_query(&p, type, class, dn);
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	if (ac->ac_options & (RES_USE_EDNS0 | RES_USE_DNSSEC))
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		_asr_pack_edns0(&p, MAXPACKETSZ,
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		    ac->ac_options & RES_USE_DNSSEC);
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	_asr_ctx_unref(ac);
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	if (p.err)
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		return (-1);
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	return (p.offset);
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}
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/*
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 * This function is not documented, but used by sendmail.
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 * Put here because it uses asr_private.h too.
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 */
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int
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res_querydomain(const char *name,
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    const char *domain,
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    int class,
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    int type,
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    u_char *answer,
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    int anslen)
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{
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	char	fqdn[MAXDNAME], ndom[MAXDNAME];
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	size_t	n;
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	/* we really want domain to end with a dot for now */
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	if (domain && ((n = strlen(domain)) == 0 || domain[n - 1 ] != '.')) {
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		if (strlcpy(ndom, domain, sizeof(ndom)) >= sizeof(ndom) ||
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		    strlcat(ndom, ".", sizeof(ndom)) >= sizeof(ndom)) {
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			h_errno = NETDB_INTERNAL;
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			errno = EINVAL;
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			return (-1);
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		}
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		domain = ndom;
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	}
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	if (_asr_make_fqdn(name, domain, fqdn, sizeof fqdn) == 0) {
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		h_errno = NETDB_INTERNAL;
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		errno = EINVAL;
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		return (-1);
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	}
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	return (res_query(fqdn, class, type, answer, anslen));
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}