Ejemplo n.º 1
0
int
main(int argc, char *argv[]) {
	lwres_context_t *ctx;
	const char *file = "/etc/resolv.conf";
	int ret;
#ifdef USE_ISC_MEM
	isc_mem_t *mem;
	isc_result_t result;
#endif

	isc__mem_register();
	isc__task_register();
	isc__timer_register();
	isc__socket_register();
	if (argc > 1) {
		file = argv[1];
	}

#ifdef USE_ISC_MEM
	mem = NULL;
	result = isc_mem_create(0, 0, &mem);
	INSIST(result == ISC_R_SUCCESS);
#endif

	ctx = NULL;
#ifdef USE_ISC_MEM
	ret = lwres_context_create(&ctx, mem, mem_alloc, mem_free, 0);
#else
	ret = lwres_context_create(&ctx, NULL, NULL, NULL, 0);
#endif
	CHECK(ret, "lwres_context_create");

	lwres_conf_init(ctx);
	if (lwres_conf_parse(ctx, file) == 0) {
		lwres_conf_print(ctx, stderr);
	} else {
		perror("lwres_conf_parse");
	}

	lwres_conf_clear(ctx);
	lwres_context_destroy(&ctx);

#ifdef USE_ISC_MEM
	isc_mem_stats(mem, stdout);
	isc_mem_destroy(&mem);
#endif

	return (0);
}
Ejemplo n.º 2
0
/*
 * Convert a resolv.conf file into a config structure.
 */
isc_result_t
ns_lwresd_parseeresolvconf(isc_mem_t *mctx, cfg_parser_t *pctx,
			   cfg_obj_t **configp)
{
	char text[4096];
	char str[16];
	isc_buffer_t b;
	lwres_context_t *lwctx = NULL;
	lwres_conf_t *lwc = NULL;
	isc_sockaddr_t sa;
	isc_netaddr_t na;
	int i;
	isc_result_t result;
	lwres_result_t lwresult;

	lwctx = NULL;
	lwresult = lwres_context_create(&lwctx, mctx, ns__lwresd_memalloc,
					ns__lwresd_memfree,
					LWRES_CONTEXT_SERVERMODE);
	if (lwresult != LWRES_R_SUCCESS) {
		result = ISC_R_NOMEMORY;
		goto cleanup;
	}

	lwresult = lwres_conf_parse(lwctx, lwresd_g_resolvconffile);
	if (lwresult != LWRES_R_SUCCESS) {
		result = DNS_R_SYNTAX;
		goto cleanup;
	}

	lwc = lwres_conf_get(lwctx);
	INSIST(lwc != NULL);

	isc_buffer_init(&b, text, sizeof(text));

	CHECK(buffer_putstr(&b, "options {\n"));

	/*
	 * Build the list of forwarders.
	 */
	if (lwc->nsnext > 0) {
		CHECK(buffer_putstr(&b, "\tforwarders {\n"));

		for (i = 0; i < lwc->nsnext; i++) {
			CHECK(lwaddr_sockaddr_fromlwresaddr(
							&sa,
							&lwc->nameservers[i],
							ns_g_port));
			isc_netaddr_fromsockaddr(&na, &sa);
			CHECK(buffer_putstr(&b, "\t\t"));
			CHECK(isc_netaddr_totext(&na, &b));
			CHECK(buffer_putstr(&b, ";\n"));
		}
		CHECK(buffer_putstr(&b, "\t};\n"));
	}

	/*
	 * Build the sortlist
	 */
	if (lwc->sortlistnxt > 0) {
		CHECK(buffer_putstr(&b, "\tsortlist {\n"));
		CHECK(buffer_putstr(&b, "\t\t{\n"));
		CHECK(buffer_putstr(&b, "\t\t\tany;\n"));
		CHECK(buffer_putstr(&b, "\t\t\t{\n"));
		for (i = 0; i < lwc->sortlistnxt; i++) {
			lwres_addr_t *lwaddr = &lwc->sortlist[i].addr;
			lwres_addr_t *lwmask = &lwc->sortlist[i].mask;
			unsigned int mask;

			CHECK(lwaddr_sockaddr_fromlwresaddr(&sa, lwmask, 0));
			isc_netaddr_fromsockaddr(&na, &sa);
			result = isc_netaddr_masktoprefixlen(&na, &mask);
			if (result != ISC_R_SUCCESS) {
				char addrtext[ISC_NETADDR_FORMATSIZE];
				isc_netaddr_format(&na, addrtext,
						   sizeof(addrtext));
				isc_log_write(ns_g_lctx,
					      NS_LOGCATEGORY_GENERAL,
					      NS_LOGMODULE_LWRESD,
					      ISC_LOG_ERROR,
					      "processing sortlist: '%s' is "
					      "not a valid netmask",
					      addrtext);
				goto cleanup;
			}

			CHECK(lwaddr_sockaddr_fromlwresaddr(&sa, lwaddr, 0));
			isc_netaddr_fromsockaddr(&na, &sa);

			CHECK(buffer_putstr(&b, "\t\t\t\t"));
			CHECK(isc_netaddr_totext(&na, &b));
			snprintf(str, sizeof(str), "%u", mask);
			CHECK(buffer_putstr(&b, "/"));
			CHECK(buffer_putstr(&b, str));
			CHECK(buffer_putstr(&b, ";\n"));
		}
		CHECK(buffer_putstr(&b, "\t\t\t};\n"));
		CHECK(buffer_putstr(&b, "\t\t};\n"));
		CHECK(buffer_putstr(&b, "\t};\n"));
	}

	CHECK(buffer_putstr(&b, "};\n\n"));

	CHECK(buffer_putstr(&b, "lwres {\n"));

	/*
	 * Build the search path
	 */
	if (lwc->searchnxt > 0) {
		if (lwc->searchnxt > 0) {
			CHECK(buffer_putstr(&b, "\tsearch {\n"));
			for (i = 0; i < lwc->searchnxt; i++) {
				CHECK(buffer_putstr(&b, "\t\t\""));
				CHECK(buffer_putstr(&b, lwc->search[i]));
				CHECK(buffer_putstr(&b, "\";\n"));
			}
			CHECK(buffer_putstr(&b, "\t};\n"));
		}
	}

	/*
	 * Build the ndots line
	 */
	if (lwc->ndots != 1) {
		CHECK(buffer_putstr(&b, "\tndots "));
		snprintf(str, sizeof(str), "%u", lwc->ndots);
		CHECK(buffer_putstr(&b, str));
		CHECK(buffer_putstr(&b, ";\n"));
	}

	/*
	 * Build the listen-on line
	 */
	if (lwc->lwnext > 0) {
		CHECK(buffer_putstr(&b, "\tlisten-on {\n"));

		for (i = 0; i < lwc->lwnext; i++) {
			CHECK(lwaddr_sockaddr_fromlwresaddr(&sa,
							    &lwc->lwservers[i],
							    0));
			isc_netaddr_fromsockaddr(&na, &sa);
			CHECK(buffer_putstr(&b, "\t\t"));
			CHECK(isc_netaddr_totext(&na, &b));
			CHECK(buffer_putstr(&b, ";\n"));
		}
		CHECK(buffer_putstr(&b, "\t};\n"));
	}

	CHECK(buffer_putstr(&b, "};\n"));

#if 0
	printf("%.*s\n",
	       (int)isc_buffer_usedlength(&b),
	       (char *)isc_buffer_base(&b));
#endif

	lwres_conf_clear(lwctx);
	lwres_context_destroy(&lwctx);

	return (cfg_parse_buffer(pctx, &b, &cfg_type_namedconf, configp));

 cleanup:

	if (lwctx != NULL) {
		lwres_conf_clear(lwctx);
		lwres_context_destroy(&lwctx);
	}

	return (result);
}
Ejemplo n.º 3
0
int
main(int argc, char *argv[]) {
	int ret;
#ifdef USE_ISC_MEM
	isc_mem_t *mem;
	isc_result_t result;
#endif

	(void)argc;
	(void)argv;

#ifdef USE_ISC_MEM
	mem = NULL;
	result = isc_mem_create(0, 0, &mem);
	INSIST(result == ISC_R_SUCCESS);
#endif

	ctx = NULL;
#ifdef USE_ISC_MEM
	ret = lwres_context_create(&ctx, mem, mem_alloc, mem_free, 0);
#else
	ret = lwres_context_create(&ctx, NULL, NULL, NULL, 0);
#endif

	CHECK(ret, "lwres_context_create");

	ret = lwres_conf_parse(ctx, "/etc/resolv.conf");
	CHECK(ret, "lwres_conf_parse");

	lwres_conf_print(ctx, stdout);

	test_noop();

	/*
	 * The following comments about tests all assume your search path is
	 *	nominum.com isc.org flame.org
	 * and ndots is the default of 1.
	 */
	test_gabn("alias-05.test"); /* exact, then search. */
	test_gabn("f.root-servers.net.");
	test_gabn("poofball.flame.org.");
	test_gabn("foo.ip6.int.");
	test_gabn("notthereatall.flame.org");  /* exact, then search (!found)*/
	test_gabn("shell"); /* search (found in nominum.com), then exact */
	test_gabn("kechara"); /* search (found in flame.org), then exact */
	test_gabn("lkasdjlaksjdlkasjdlkasjdlkasjd"); /* search, exact(!found)*/

	test_gnba("198.133.199.1", LWRES_ADDRTYPE_V4);
	test_gnba("204.152.184.79", LWRES_ADDRTYPE_V4);
	test_gnba("3ffe:8050:201:1860:42::1", LWRES_ADDRTYPE_V6);

	lwres_conf_clear(ctx);
	lwres_context_destroy(&ctx);

#ifdef USE_ISC_MEM
	isc_mem_stats(mem, stdout);
	isc_mem_destroy(&mem);
#endif

	return (0);
}
Ejemplo n.º 4
0
/*% performs a reverse lookup of address src which is len bytes long. af denotes the protocol family, typically #PF_INET or PF_INET6. */
struct hostent *
lwres_getipnodebyaddr(const void *src, size_t len, int af, int *error_num) {
	struct hostent *he1, *he2;
	lwres_context_t *lwrctx = NULL;
	lwres_gnbaresponse_t *by = NULL;
	lwres_result_t n;
	union {
		const void *konst;
		struct in6_addr *in6;
	} u;

	/*
	 * Sanity checks.
	 */
	if (src == NULL) {
		*error_num = NO_RECOVERY;
		return (NULL);
	}

	switch (af) {
	case AF_INET:
		if (len != (unsigned int)INADDRSZ) {
			*error_num = NO_RECOVERY;
			return (NULL);
		}
		break;
	case AF_INET6:
		if (len != (unsigned int)IN6ADDRSZ) {
			*error_num = NO_RECOVERY;
			return (NULL);
		}
		break;
	default:
		*error_num = NO_RECOVERY;
		return (NULL);
	}

	/*
	 * The de-"const"-ing game is done because at least one
	 * vendor's system (RedHat 6.0) defines the IN6_IS_ADDR_*
	 * macros in such a way that they discard the const with
	 * internal casting, and gcc ends up complaining.  Rather
	 * than replacing their own (possibly optimized) definitions
	 * with our own, cleanly discarding the const is the easiest
	 * thing to do.
	 */
	u.konst = src;

	/*
	 * Look up IPv4 and IPv4 mapped/compatible addresses.
	 */
	if ((af == AF_INET6 && IN6_IS_ADDR_V4COMPAT(u.in6)) ||
	    (af == AF_INET6 && IN6_IS_ADDR_V4MAPPED(u.in6)) ||
	    (af == AF_INET)) {
		const unsigned char *cp = src;

		if (af == AF_INET6)
			cp += 12;
		n = lwres_context_create(&lwrctx, NULL, NULL, NULL, 0);
		if (n == LWRES_R_SUCCESS)
			(void) lwres_conf_parse(lwrctx, lwres_resolv_conf);
		if (n == LWRES_R_SUCCESS)
			n = lwres_getnamebyaddr(lwrctx, LWRES_ADDRTYPE_V4,
						INADDRSZ, cp, &by);
		if (n != LWRES_R_SUCCESS) {
			lwres_conf_clear(lwrctx);
			lwres_context_destroy(&lwrctx);
			if (n == LWRES_R_NOTFOUND)
				*error_num = HOST_NOT_FOUND;
			else
				*error_num = NO_RECOVERY;
			return (NULL);
		}
		he1 = hostfromaddr(by, AF_INET, cp);
		lwres_gnbaresponse_free(lwrctx, &by);
		lwres_conf_clear(lwrctx);
		lwres_context_destroy(&lwrctx);
		if (af != AF_INET6)
			return (he1);

		/*
		 * Convert from AF_INET to AF_INET6.
		 */
		he2 = copyandmerge(he1, NULL, af, error_num);
		lwres_freehostent(he1);
		if (he2 == NULL)
			return (NULL);
		/*
		 * Restore original address.
		 */
		memcpy(he2->h_addr, src, len);
		return (he2);
	}

	/*
	 * Lookup IPv6 address.
	 */
	if (memcmp(src, &in6addr_any, IN6ADDRSZ) == 0) {
		*error_num = HOST_NOT_FOUND;
		return (NULL);
	}

	n = lwres_context_create(&lwrctx, NULL, NULL, NULL, 0);
	if (n == LWRES_R_SUCCESS)
		(void) lwres_conf_parse(lwrctx, lwres_resolv_conf);
	if (n == LWRES_R_SUCCESS)
		n = lwres_getnamebyaddr(lwrctx, LWRES_ADDRTYPE_V6, IN6ADDRSZ,
					src, &by);
	if (n != 0) {
		lwres_conf_clear(lwrctx);
		lwres_context_destroy(&lwrctx);

		if (n == LWRES_R_NOTFOUND)
		       *error_num = HOST_NOT_FOUND;
		else
		       *error_num = NO_RECOVERY;

		return (NULL);
	}

	he1 = hostfromaddr(by, AF_INET6, src);
	lwres_gnbaresponse_free(lwrctx, &by);
	if (he1 == NULL)
		*error_num = NO_RECOVERY;
	lwres_conf_clear(lwrctx);
	lwres_context_destroy(&lwrctx);
	return (he1);
}
Ejemplo n.º 5
0
struct hostent *
lwres_getipnodebyname(const char *name, int af, int flags, int *error_num) {
	int have_v4 = 1, have_v6 = 1;
	struct in_addr in4;
	struct in6_addr in6;
	struct hostent he, *he1 = NULL, *he2 = NULL, *he3 = NULL;
	int v4 = 0, v6 = 0;
	int tmp_err = 0;
	lwres_context_t *lwrctx = NULL;
	lwres_gabnresponse_t *by = NULL;
	int n;

	/*
	 * If we care about active interfaces then check.
	 */
	if ((flags & AI_ADDRCONFIG) != 0)
		if (scan_interfaces(&have_v4, &have_v6) == -1) {
			*error_num = NO_RECOVERY;
			return (NULL);
		}

	/* Check for literal address. */
	if ((v4 = lwres_net_pton(AF_INET, name, &in4)) != 1)
		v6 = lwres_net_pton(AF_INET6, name, &in6);

	/*
	 * Impossible combination?
	 */
	if ((af == AF_INET6 && (flags & AI_V4MAPPED) == 0 && v4 == 1) ||
	    (af == AF_INET && v6 == 1) ||
	    (have_v4 == 0 && v4 == 1) ||
	    (have_v6 == 0 && v6 == 1) ||
	    (have_v4 == 0 && af == AF_INET) ||
	    (have_v6 == 0 && af == AF_INET6 &&
	     (((flags & AI_V4MAPPED) != 0 && have_v4) ||
	      (flags & AI_V4MAPPED) == 0))) {
		*error_num = HOST_NOT_FOUND;
		return (NULL);
	}

	/*
	 * Literal address?
	 */
	if (v4 == 1 || v6 == 1) {
		char *addr_list[2];
		char *aliases[1];
		char mappedname[sizeof("::ffff:123.123.123.123")];
		union {
			const char *const_name;
			char *deconst_name;
		} u;

		u.const_name = name;
		if (v4 == 1 && af == AF_INET6) {
			strcpy(mappedname, "::ffff:");
			lwres_net_ntop(AF_INET, (char *)&in4,
				       mappedname + sizeof("::ffff:") - 1,
				       sizeof(mappedname) - sizeof("::ffff:")
				       + 1);
			he.h_name = mappedname;
		} else
			he.h_name = u.deconst_name;
		he.h_addr_list = addr_list;
		he.h_addr_list[0] = (v4 == 1) ? (char *)&in4 : (char *)&in6;
		he.h_addr_list[1] = NULL;
		he.h_aliases = aliases;
		he.h_aliases[0] = NULL;
		he.h_length = (v4 == 1) ? INADDRSZ : IN6ADDRSZ;
		he.h_addrtype = (v4 == 1) ? AF_INET : AF_INET6;
		return (copyandmerge(&he, NULL, af, error_num));
	}

	n = lwres_context_create(&lwrctx, NULL, NULL, NULL, 0);
	if (n != 0) {
		*error_num = NO_RECOVERY;
		goto cleanup;
	}
	(void) lwres_conf_parse(lwrctx, lwres_resolv_conf);
	tmp_err = NO_RECOVERY;
	if (have_v6 && af == AF_INET6) {
		n = lwres_getaddrsbyname(lwrctx, name, LWRES_ADDRTYPE_V6, &by);
		if (n == 0) {
			he1 = hostfromname(by, AF_INET6);
			lwres_gabnresponse_free(lwrctx, &by);
			if (he1 == NULL) {
				*error_num = NO_RECOVERY;
				goto cleanup;
			}
		} else {
			if (n == LWRES_R_NOTFOUND)
				tmp_err = HOST_NOT_FOUND;
			else {
				*error_num = NO_RECOVERY;
				goto cleanup;
			}
		}
	}

	if (have_v4 &&
	    ((af == AF_INET) ||
	     (af == AF_INET6 && (flags & AI_V4MAPPED) != 0 &&
	      (he1 == NULL || (flags & AI_ALL) != 0)))) {
		n = lwres_getaddrsbyname(lwrctx, name, LWRES_ADDRTYPE_V4, &by);
		if (n == 0) {
			he2 = hostfromname(by, AF_INET);
			lwres_gabnresponse_free(lwrctx, &by);
			if (he2 == NULL) {
				*error_num = NO_RECOVERY;
				goto cleanup;
			}
		} else if (he1 == NULL) {
			if (n == LWRES_R_NOTFOUND)
				*error_num = HOST_NOT_FOUND;
			else
				*error_num = NO_RECOVERY;
			goto cleanup;
		}
	} else
		*error_num = tmp_err;

	he3 = copyandmerge(he1, he2, af, error_num);

 cleanup:
	if (he1 != NULL)
		lwres_freehostent(he1);
	if (he2 != NULL)
		lwres_freehostent(he2);
	if (lwrctx != NULL) {
		lwres_conf_clear(lwrctx);
		lwres_context_destroy(&lwrctx);
	}
	return (he3);
}
Ejemplo n.º 6
0
/*% Returns a set of resource records associated with a hostname, class, and type. hostname is a pointer a to null-terminated string. */
int
lwres_getrrsetbyname(const char *hostname, unsigned int rdclass,
		     unsigned int rdtype, unsigned int flags,
		     struct rrsetinfo **res)
{
	lwres_context_t *lwrctx = NULL;
	lwres_result_t lwresult;
	lwres_grbnresponse_t *response = NULL;
	struct rrsetinfo *rrset = NULL;
	unsigned int i;
	unsigned int lwflags;
	unsigned int result;

	if (rdclass > 0xffff || rdtype > 0xffff) {
		result = ERRSET_INVAL;
		goto fail;
	}

	/*
	 * Don't allow queries of class or type ANY
	 */
	if (rdclass == 0xff || rdtype == 0xff) {
		result = ERRSET_INVAL;
		goto fail;
	}

	lwresult = lwres_context_create(&lwrctx, NULL, NULL, NULL, 0);
	if (lwresult != LWRES_R_SUCCESS) {
		result = lwresult_to_result(lwresult);
		goto fail;
	}
	(void) lwres_conf_parse(lwrctx, lwres_resolv_conf);

	/*
	 * If any input flags were defined, lwflags would be set here
	 * based on them
	 */
	UNUSED(flags);
	lwflags = 0;

	lwresult = lwres_getrdatabyname(lwrctx, hostname,
					(lwres_uint16_t)rdclass, 
					(lwres_uint16_t)rdtype,
					lwflags, &response);
	if (lwresult != LWRES_R_SUCCESS) {
		result = lwresult_to_result(lwresult);
		goto fail;
	}

	rrset = sane_malloc(sizeof(struct rrsetinfo));
	if (rrset == NULL) {
		result = ERRSET_NOMEMORY;
		goto fail;
	}
	rrset->rri_name = NULL;
	rrset->rri_rdclass = response->rdclass;
	rrset->rri_rdtype = response->rdtype;
	rrset->rri_ttl = response->ttl;
	rrset->rri_flags = 0;
	rrset->rri_nrdatas = 0;
	rrset->rri_rdatas = NULL;
	rrset->rri_nsigs = 0;
	rrset->rri_sigs = NULL;

	rrset->rri_name = sane_malloc(response->realnamelen + 1);
	if (rrset->rri_name == NULL) {
		result = ERRSET_NOMEMORY;
		goto fail;
	}
	strncpy(rrset->rri_name, response->realname, response->realnamelen);
	rrset->rri_name[response->realnamelen] = 0;

	if ((response->flags & LWRDATA_VALIDATED) != 0)
		rrset->rri_flags |= RRSET_VALIDATED;

	rrset->rri_nrdatas = response->nrdatas;
	rrset->rri_rdatas = sane_calloc(rrset->rri_nrdatas,
				   sizeof(struct rdatainfo));
	if (rrset->rri_rdatas == NULL) {
		result = ERRSET_NOMEMORY;
		goto fail;
	}
	for (i = 0; i < rrset->rri_nrdatas; i++) {
		rrset->rri_rdatas[i].rdi_length = response->rdatalen[i];
		rrset->rri_rdatas[i].rdi_data =
				sane_malloc(rrset->rri_rdatas[i].rdi_length);
		if (rrset->rri_rdatas[i].rdi_data == NULL) {
			result = ERRSET_NOMEMORY;
			goto fail;
		}
		memcpy(rrset->rri_rdatas[i].rdi_data, response->rdatas[i],
		       rrset->rri_rdatas[i].rdi_length);
	}
	rrset->rri_nsigs = response->nsigs;
	rrset->rri_sigs = sane_calloc(rrset->rri_nsigs,
				      sizeof(struct rdatainfo));
	if (rrset->rri_sigs == NULL) {
		result = ERRSET_NOMEMORY;
		goto fail;
	}
	for (i = 0; i < rrset->rri_nsigs; i++) {
		rrset->rri_sigs[i].rdi_length = response->siglen[i];
		rrset->rri_sigs[i].rdi_data =
				sane_malloc(rrset->rri_sigs[i].rdi_length);
		if (rrset->rri_sigs[i].rdi_data == NULL) {
			result = ERRSET_NOMEMORY;
			goto fail;
		}
		memcpy(rrset->rri_sigs[i].rdi_data, response->sigs[i],
		       rrset->rri_sigs[i].rdi_length);
	}

	lwres_grbnresponse_free(lwrctx, &response);
	lwres_conf_clear(lwrctx);
	lwres_context_destroy(&lwrctx);
	*res = rrset;
	return (ERRSET_SUCCESS);
 fail:
	if (rrset != NULL)
		lwres_freerrset(rrset);
	if (response != NULL)
		lwres_grbnresponse_free(lwrctx, &response);
	if (lwrctx != NULL) {
		lwres_conf_clear(lwrctx);
		lwres_context_destroy(&lwrctx);
	}
	return (result);
}
Ejemplo n.º 7
0
static int
add_ipv6(const char *hostname, int flags, struct addrinfo **aip,
	 int socktype, int port)
{
	struct addrinfo *ai;
	lwres_context_t *lwrctx = NULL;
	lwres_gabnresponse_t *by = NULL;
	lwres_addr_t *addr;
	lwres_result_t lwres;
	int result = 0;

	lwres = lwres_context_create(&lwrctx, NULL, NULL, NULL, 0);
	if (lwres != LWRES_R_SUCCESS)
		ERR(EAI_FAIL);
	(void) lwres_conf_parse(lwrctx, lwres_resolv_conf);

	if (hostname == NULL && (flags & AI_PASSIVE) == 0) {
		ai = ai_clone(*aip, AF_INET6);
		if (ai == NULL) {
			lwres_freeaddrinfo(*aip);
			ERR(EAI_MEMORY);
		}

		*aip = ai;
		ai->ai_socktype = socktype;
		SIN6(ai->ai_addr)->sin6_port = port;
		memcpy(&SIN6(ai->ai_addr)->sin6_addr, v6_loop, 16);
	} else {
		lwres = lwres_getaddrsbyname(lwrctx, hostname,
					     LWRES_ADDRTYPE_V6, &by);
		if (lwres != LWRES_R_SUCCESS) {
			if (lwres == LWRES_R_NOTFOUND)
				goto cleanup;
			else
				ERR(EAI_FAIL);
		}
		addr = LWRES_LIST_HEAD(by->addrs);
		while (addr != NULL) {
			ai = ai_clone(*aip, AF_INET6);
			if (ai == NULL) {
				lwres_freeaddrinfo(*aip);
				ERR(EAI_MEMORY);
			}
			*aip = ai;
			ai->ai_socktype = socktype;
			SIN6(ai->ai_addr)->sin6_port = port;
			memcpy(&SIN6(ai->ai_addr)->sin6_addr,
			       addr->address, 16);
			if (flags & AI_CANONNAME) {
				ai->ai_canonname = strdup(by->realname);
				if (ai->ai_canonname == NULL)
					ERR(EAI_MEMORY);
			}
			addr = LWRES_LIST_NEXT(addr, link);
		}
	}
 cleanup:
	if (by != NULL)
		lwres_gabnresponse_free(lwrctx, &by);
	if (lwrctx != NULL) {
		lwres_conf_clear(lwrctx);
		lwres_context_destroy(&lwrctx);
	}
	return (result);
}