resolv: Add beginnings of a libresolv test suite

1 files changed, 201 insertions, 0 deletions

diff --git a/resolv/tst-res_use_inet6.c b/resolv/tst-res_use_inet6.c
new file mode 100644
index 0000000..5ed0ad0
--- /dev/null
+++ b/resolv/tst-res_use_inet6.c
@@ -0,0 +1,201 @@
+/* Basic functionality tests for inet6 option processing.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <netdb.h>
+#include <resolv.h>
+#include <string.h>
+#include <support/check_nss.h>
+#include <support/resolv_test.h>
+#include <support/xthread.h>
+
+static void
+response (const struct resolv_response_context *ctx,
+          struct resolv_response_builder *b,
+          const char *qname, uint16_t qclass, uint16_t qtype)
+{
+  bool include_both =  strcmp (qname, "both.example") == 0;
+  bool include_a = qtype == T_A || include_both;
+  bool include_aaaa = qtype == T_AAAA || include_both;
+
+  resolv_response_init (b, (struct resolv_response_flags) {});
+  resolv_response_add_question (b, qname, qclass, qtype);
+  resolv_response_section (b, ns_s_an);
+  if (include_a)
+    {
+      char ipv4[4] = {192, 0, 2, 17};
+      resolv_response_open_record (b, qname, qclass, T_A, 0);
+      resolv_response_add_data (b, &ipv4, sizeof (ipv4));
+      resolv_response_close_record (b);
+    }
+  if (include_aaaa)
+    {
+        char ipv6[16]
+          = {0x20, 0x01, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1};
+        resolv_response_open_record (b, qname, qclass, T_AAAA, 0);
+        resolv_response_add_data (b, &ipv6, sizeof (ipv6));
+        resolv_response_close_record (b);
+    }
+}
+
+/* Test that getaddrinfo is not influenced by RES_USE_INET6.  */
+static void
+test_gai (void)
+{
+  {
+    struct addrinfo hints =
+      {
+        .ai_family = AF_UNSPEC,
+        .ai_socktype = SOCK_STREAM,
+        .ai_protocol = IPPROTO_TCP,
+      };
+    struct addrinfo *ai;
+    int ret = getaddrinfo ("www1.example", "80", &hints, &ai);
+    check_addrinfo ("getaddrinfo AF_UNSPEC www1.example", ai, ret,
+                    "address: STREAM/TCP 192.0.2.17 80\n"
+                    "address: STREAM/TCP 2001:db8::1 80\n");
+    if (ret == 0)
+      freeaddrinfo (ai);
+    ret = getaddrinfo ("both.example", "80", &hints, &ai);
+    /* Combined A/AAAA responses currently result in address
+       duplication.  */
+    check_addrinfo ("getaddrinfo AF_UNSPEC both.example", ai, ret,
+                    "address: STREAM/TCP 192.0.2.17 80\n"
+                    "address: STREAM/TCP 192.0.2.17 80\n"
+                    "address: STREAM/TCP 2001:db8::1 80\n"
+                    "address: STREAM/TCP 2001:db8::1 80\n");
+    if (ret == 0)
+      freeaddrinfo (ai);
+  }
+  {
+    struct addrinfo hints =
+      {
+        .ai_family = AF_INET,
+        .ai_socktype = SOCK_STREAM,
+        .ai_protocol = IPPROTO_TCP,
+      };
+    struct addrinfo *ai;
+    int ret = getaddrinfo ("www1.example", "80", &hints, &ai);
+    check_addrinfo ("getaddrinfo AF_INET www1.example", ai, ret,
+                    "address: STREAM/TCP 192.0.2.17 80\n");
+    if (ret == 0)
+      freeaddrinfo (ai);
+    ret = getaddrinfo ("both.example", "80", &hints, &ai);
+    check_addrinfo ("getaddrinfo AF_INET both.example", ai, ret,
+                    "address: STREAM/TCP 192.0.2.17 80\n");
+    if (ret == 0)
+      freeaddrinfo (ai);
+  }
+  {
+    struct addrinfo hints =
+      {
+        .ai_family = AF_INET6,
+        .ai_socktype = SOCK_STREAM,
+        .ai_protocol = IPPROTO_TCP,
+      };
+    struct addrinfo *ai;
+    int ret = getaddrinfo ("www1.example", "80", &hints, &ai);
+    check_addrinfo ("getaddrinfo (AF_INET6)", ai, ret,
+                    "address: STREAM/TCP 2001:db8::1 80\n");
+    if (ret == 0)
+      freeaddrinfo (ai);
+    ret = getaddrinfo ("both.example", "80", &hints, &ai);
+    check_addrinfo ("getaddrinfo AF_INET6 both.example", ai, ret,
+                    "address: STREAM/TCP 2001:db8::1 80\n");
+    if (ret == 0)
+      freeaddrinfo (ai);
+  }
+}
+
+/* Test that gethostbyname2 is not influenced by RES_USE_INET6.  */
+static void
+test_get2 (void)
+{
+  check_hostent ("gethostbyname2 AF_INET www1.example",
+                 gethostbyname2 ("www1.example", AF_INET),
+                 "name: www1.example\n"
+                 "address: 192.0.2.17\n");
+  check_hostent ("gethostbyname2 AF_INET both.example",
+                 gethostbyname2 ("both.example", AF_INET),
+                 "name: both.example\n"
+                 "address: 192.0.2.17\n");
+
+  check_hostent ("gethostbyname2 AF_INET6 www1.example",
+                 gethostbyname2 ("www1.example", AF_INET6),
+                 "name: www1.example\n"
+                 "address: 2001:db8::1\n");
+  check_hostent ("gethostbyname2 AF_INET6 both.example",
+                 gethostbyname2 ("both.example", AF_INET6),
+                 "name: both.example\n"
+                 "address: 2001:db8::1\n");
+}
+
+static void *
+threadfunc (void *ignored)
+{
+  struct resolv_test *obj = resolv_test_start
+    ((struct resolv_redirect_config)
+     {
+       .response_callback = response
+     });
+
+  check_hostent ("gethostbyname (\"www1.example\")",
+                 gethostbyname ("www1.example"),
+                 "name: www1.example\n"
+                 "address: 192.0.2.17\n");
+  check_hostent ("gethostbyname (\"both.example\")",
+                 gethostbyname ("both.example"),
+                 "name: both.example\n"
+                 "address: 192.0.2.17\n");
+  test_get2 ();
+  test_gai ();
+
+  _res.options |= RES_USE_INET6;
+  check_hostent ("gethostbyname (\"www1.example\")",
+                 gethostbyname ("www1.example"),
+                 "name: www1.example\n"
+                 "address: 2001:db8::1\n");
+  check_hostent ("gethostbyname (\"both.example\")",
+                 gethostbyname ("both.example"),
+                 "name: both.example\n"
+                 "address: 2001:db8::1\n");
+  test_get2 ();
+  test_gai ();
+
+  resolv_test_end (obj);
+
+  return NULL;
+}
+
+static int
+do_test (void)
+{
+  resolv_test_init ();
+
+  /* Attempt to run on a non-main thread first.  */
+  {
+    pthread_t thr = xpthread_create (NULL, threadfunc, NULL);
+    xpthread_join (thr);
+  }
+
+  /* Try the main thread next.  */
+  threadfunc (NULL);
+
+  return 0;
+}
+
+#include <support/test-driver.c>