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diff --git a/lib/libc/tests/net/getaddrinfo/Makefile b/lib/libc/tests/net/getaddrinfo/Makefile
--- a/lib/libc/tests/net/getaddrinfo/Makefile
+++ b/lib/libc/tests/net/getaddrinfo/Makefile
@@ -7,6 +7,7 @@
BINDIR= ${TESTSDIR}
NETBSD_ATF_TESTS_SH= getaddrinfo_test
+ATF_TESTS_C= getaddrinfo
PROGS= h_gai
diff --git a/lib/libc/tests/net/getaddrinfo/getaddrinfo.c b/lib/libc/tests/net/getaddrinfo/getaddrinfo.c
new file mode 100644
--- /dev/null
+++ b/lib/libc/tests/net/getaddrinfo/getaddrinfo.c
@@ -0,0 +1,267 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2025 Gleb Smirnoff <glebius@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <dlfcn.h>
+#include <errno.h>
+#include <netdb.h>
+#include <stdlib.h>
+#include <string.h>
+#include <resolv.h>
+
+#include <atf-c.h>
+
+static const char goodname[] = "www.freebsd.org";
+static const char goodname_dot[] = "www.freebsd.org.";
+static const char badname[] = "does-not-exist.freebsd.org";
+static const char badname_dot[] = "does-not-exist.freebsd.org.";
+static const char ipv6onlyname[] = "beefy15.nyi.freebsd.org";
+static const char ipv6onlyname_dot[] = "beefy15.nyi.freebsd.org.";
+static const char ipv4onlyname[] = "ipv4only.arpa";
+static const char ipv4onlyname_dot[] = "ipv4only.arpa.";
+/*
+ * We need an IP address that doesn't exist, but not reported with ICMP
+ * unreachable by the nearest router. Let's try TEST-NET-3.
+ */
+static char badresolvconf[] = "nameserver 203.0.113.1";
+static char badresolvconf2[] = "nameserver 203.0.113.1\n"
+ "nameserver 203.0.113.2";
+static char *resconf = NULL;
+FILE *
+fopen(const char * restrict path, const char * restrict mode)
+{
+ static FILE *(*orig)(const char *, const char *);
+
+ if (orig == NULL && (orig = dlsym(RTLD_NEXT, "fopen")) == NULL)
+ atf_libc_error(ENOENT, "dlsym(fopen): %s", dlerror());
+ if (resconf != NULL && strcmp(path, _PATH_RESCONF) == 0)
+ return (fmemopen(resconf, strlen(resconf), mode));
+ else
+ return (orig(path, mode));
+}
+
+static int send_error = 0;
+ssize_t
+send(int s, const void *msg, size_t len, int flags)
+{
+ static ssize_t (*orig)(int, const void *, size_t, int);
+
+ if (orig == NULL && (orig = dlsym(RTLD_NEXT, "send")) == NULL)
+ atf_libc_error(ENOENT, "dlsym(send): %s", dlerror());
+ if (send_error != 0) {
+ errno = send_error;
+ return (-1);
+ } else {
+ return (orig(s, msg, len, flags));
+ }
+}
+
+ATF_TC_WITHOUT_HEAD(basic);
+ATF_TC_BODY(basic, tc)
+{
+ static const struct addrinfo hints = {
+ .ai_family = AF_UNSPEC,
+ .ai_flags = AI_CANONNAME,
+ };
+ struct addrinfo *res;
+ int rv;
+
+ rv = getaddrinfo(goodname, NULL, &hints, &res);
+ ATF_REQUIRE_MSG(rv == 0,
+ "Expected 0, got %d (%s)", rv, gai_strerror(rv));
+ freeaddrinfo(res);
+
+ rv = getaddrinfo(goodname_dot, NULL, &hints, &res);
+ ATF_REQUIRE_MSG(rv == 0,
+ "Expected 0, got %d (%s)", rv, gai_strerror(rv));
+ freeaddrinfo(res);
+
+ rv = getaddrinfo(badname, NULL, &hints, &res);
+ ATF_REQUIRE_MSG(rv == EAI_NONAME,
+ "Expected %d (EAI_NONAME), got %d (%s)",
+ EAI_NONAME, rv, gai_strerror(rv));
+
+ rv = getaddrinfo(badname_dot, NULL, &hints, &res);
+ ATF_REQUIRE_MSG(rv == EAI_NONAME,
+ "Expected %d (EAI_NONAME), got %d (%s)",
+ EAI_NONAME, rv, gai_strerror(rv));
+}
+
+ATF_TC_WITHOUT_HEAD(timeout);
+ATF_TC_BODY(timeout, tc)
+{
+ static const struct addrinfo hints = {
+ .ai_family = AF_UNSPEC,
+ .ai_flags = AI_CANONNAME,
+ };
+ struct addrinfo *res;
+ int rv;
+
+ resconf = badresolvconf;
+ rv = getaddrinfo(goodname, NULL, &hints, &res);
+ /*
+ * XXXGL: EAI_ADDRFAMILY is most likely a regression from 144361386696.
+ * Error code on timeout used to be EAI_NONAME for many years and IMHO
+ * this is not correct either. Should be EAI_AGAIN.
+ */
+ ATF_REQUIRE_MSG(rv == EAI_ADDRFAMILY,
+ "Expected %d (EAI_ADDRFAMILY), got %d (%s)",
+ EAI_ADDRFAMILY, rv, gai_strerror(rv));
+
+ rv = getaddrinfo(goodname_dot, NULL, &hints, &res);
+ ATF_REQUIRE_MSG(rv == EAI_ADDRFAMILY,
+ "Expected %d (EAI_ADDRFAMILY), got %d (%s)",
+ EAI_ADDRFAMILY, rv, gai_strerror(rv));
+}
+
+ATF_TC_WITHOUT_HEAD(timeout_specific);
+ATF_TC_BODY(timeout_specific, tc)
+{
+ static const struct addrinfo hints = {
+ .ai_family = AF_INET,
+ .ai_socktype = SOCK_STREAM,
+ .ai_flags = AI_CANONNAME,
+ };
+ struct addrinfo *res;
+ int rv;
+
+ resconf = badresolvconf;
+ rv = getaddrinfo(goodname, "666", &hints, &res);
+ ATF_REQUIRE_MSG(rv == EAI_ADDRFAMILY,
+ "Expected %d (EAI_ADDRFAMILY), got %d (%s)",
+ EAI_ADDRFAMILY, rv, gai_strerror(rv));
+
+ rv = getaddrinfo(goodname_dot, "666", &hints, &res);
+ ATF_REQUIRE_MSG(rv == EAI_ADDRFAMILY,
+ "Expected %d (EAI_ADDRFAMILY), got %d (%s)",
+ EAI_ADDRFAMILY, rv, gai_strerror(rv));
+}
+
+ATF_TC_WITHOUT_HEAD(timeout2);
+ATF_TC_BODY(timeout2, tc)
+{
+ static const struct addrinfo hints = {
+ .ai_family = AF_UNSPEC,
+ .ai_flags = AI_CANONNAME,
+ };
+ struct addrinfo *res;
+ int rv;
+
+ resconf = badresolvconf2;
+ rv = getaddrinfo(goodname, NULL, &hints, &res);
+ ATF_REQUIRE_MSG(rv == EAI_ADDRFAMILY,
+ "Expected %d (EAI_ADDRFAMILY), got %d (%s)",
+ EAI_ADDRFAMILY, rv, gai_strerror(rv));
+
+ rv = getaddrinfo(goodname_dot, NULL, &hints, &res);
+ ATF_REQUIRE_MSG(rv == EAI_ADDRFAMILY,
+ "Expected %d (EAI_ADDRFAMILY), got %d (%s)",
+ EAI_ADDRFAMILY, rv, gai_strerror(rv));
+}
+
+/*
+ * Emulate interface/network down.
+ */
+ATF_TC_WITHOUT_HEAD(netdown);
+ATF_TC_BODY(netdown, tc)
+{
+ static const struct addrinfo hints = {
+ .ai_family = AF_UNSPEC,
+ .ai_flags = AI_CANONNAME,
+ };
+ struct addrinfo *res;
+ int rv;
+
+ send_error = ENETDOWN;
+ rv = getaddrinfo(goodname, NULL, &hints, &res);
+ ATF_REQUIRE_MSG(rv == EAI_NONAME,
+ "Expected %d (EAI_NONAME), got %d (%s)",
+ EAI_NONAME, rv, gai_strerror(rv));
+
+ rv = getaddrinfo(goodname_dot, NULL, &hints, &res);
+ ATF_REQUIRE_MSG(rv == EAI_ADDRFAMILY,
+ "Expected %d (EAI_ADDRFAMILY), got %d (%s)",
+ EAI_ADDRFAMILY, rv, gai_strerror(rv));
+}
+
+/*
+ * See https://reviews.freebsd.org/D37139.
+ */
+ATF_TC_WITHOUT_HEAD(nofamily);
+ATF_TC_BODY(nofamily, tc)
+{
+ static const struct addrinfo hints4 = {
+ .ai_family = AF_INET,
+ .ai_flags = AI_CANONNAME,
+ }, hints6 = {
+ .ai_family = AF_INET6,
+ .ai_flags = AI_CANONNAME,
+ };
+ struct addrinfo *res;
+ int rv;
+
+ rv = getaddrinfo(ipv6onlyname, NULL, &hints4, &res);
+ ATF_REQUIRE_MSG(rv == EAI_ADDRFAMILY,
+ "Expected %d (EAI_ADDRFAMILY), got %d (%s)",
+ EAI_ADDRFAMILY, rv, gai_strerror(rv));
+
+ rv = getaddrinfo(ipv6onlyname_dot, NULL, &hints4, &res);
+ ATF_REQUIRE_MSG(rv == EAI_ADDRFAMILY,
+ "Expected %d (EAI_ADDRFAMILY), got %d (%s)",
+ EAI_ADDRFAMILY, rv, gai_strerror(rv));
+
+ rv = getaddrinfo(ipv4onlyname, NULL, &hints6, &res);
+ ATF_REQUIRE_MSG(rv == EAI_ADDRFAMILY,
+ "Expected %d (EAI_ADDRFAMILY), got %d (%s)",
+ EAI_ADDRFAMILY, rv, gai_strerror(rv));
+
+ rv = getaddrinfo(ipv4onlyname_dot, NULL, &hints6, &res);
+ ATF_REQUIRE_MSG(rv == EAI_ADDRFAMILY,
+ "Expected %d (EAI_ADDRFAMILY), got %d (%s)",
+ EAI_ADDRFAMILY, rv, gai_strerror(rv));
+
+ rv = getaddrinfo(badname, NULL, &hints4, &res);
+ ATF_REQUIRE_MSG(rv == EAI_NONAME,
+ "Expected %d (EAI_NONAME), got %d (%s)",
+ EAI_NONAME, rv, gai_strerror(rv));
+
+ rv = getaddrinfo(badname_dot, NULL, &hints6, &res);
+ ATF_REQUIRE_MSG(rv == EAI_NONAME,
+ "Expected %d (EAI_NONAME), got %d (%s)",
+ EAI_NONAME, rv, gai_strerror(rv));
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+ ATF_TP_ADD_TC(tp, basic);
+ ATF_TP_ADD_TC(tp, timeout);
+ ATF_TP_ADD_TC(tp, timeout_specific);
+ ATF_TP_ADD_TC(tp, timeout2);
+ ATF_TP_ADD_TC(tp, netdown);
+ ATF_TP_ADD_TC(tp, nofamily);
+
+ return (atf_no_error());
+}

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