1 files changed, 378 insertions, 0 deletions

diff --git a/src/service/util/test_resolver_api.c b/src/service/util/test_resolver_api.c
new file mode 100644
index 000000000..f8a2164a2
--- /dev/null
+++ b/src/service/util/test_resolver_api.c
@@ -0,0 +1,378 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2009 GNUnet e.V.
+
+   GNUnet is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Affero General Public License as published
+   by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   GNUnet 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
+   Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+     SPDX-License-Identifier: AGPL3.0-or-later
+ */
+/**
+ * @file resolver/test_resolver_api.c
+ * @brief testcase for resolver_api.c
+ */
+
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_resolver_service.h"
+#include "../lib/util/resolver.h"
+
+
+static int disable_rootserver_check;
+
+
+/**
+ * Using DNS root servers to check gnunet's resolver service
+ * a.root-servers.net <-> 198.41.0.4 is a fix 1:1 mapping that should not change over years
+ * For more information have a look at IANA's website http://www.root-servers.org/
+ */
+#define ROOTSERVER_NAME "a.root-servers.net"
+#define ROOTSERVER_IP   "198.41.0.4"
+
+
+static void
+check_hostname (void *cls,
+                const struct sockaddr *sa,
+                socklen_t salen)
+{
+  int *ok = cls;
+
+  if (0 == salen)
+  {
+    (*ok) &= ~8;
+    return;
+  }
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "Got IP address `%s' for our host.\n",
+              GNUNET_a2s (sa, salen));
+}
+
+
+static void
+check_localhost_num (void *cls,
+                     const char *hostname)
+{
+  int *ok = cls;
+
+  if (hostname == NULL)
+    return;
+  if (0 == strcmp (hostname, "127.0.0.1"))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Received correct hostname `%s'.\n",
+                hostname);
+    (*ok) &= ~4;
+  }
+  else
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Received invalid hostname `%s'.\n",
+                hostname);
+    GNUNET_break (0);
+  }
+}
+
+
+static void
+check_localhost (void *cls,
+                 const char *hostname)
+{
+  int *ok = cls;
+
+  if (NULL == hostname)
+    return;
+  if (0 == strcmp (hostname, "localhost"))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Received correct hostname `%s'.\n",
+                hostname);
+    (*ok) &= ~2;
+  }
+  else
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                "Received unexpected hostname `%s', expected `localhost' (this could be OK).\n",
+                hostname);
+  }
+}
+
+
+static void
+check_127 (void *cls, const struct sockaddr *sa, socklen_t salen)
+{
+  int *ok = cls;
+  const struct sockaddr_in *sai = (const struct sockaddr_in *) sa;
+
+  if (NULL == sa)
+    return;
+  GNUNET_assert (sizeof(struct sockaddr_in) == salen);
+  if (sai->sin_addr.s_addr == htonl (INADDR_LOOPBACK))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Received correct address.\n");
+    (*ok) &= ~1;
+  }
+  else
+  {
+    char buf[INET_ADDRSTRLEN];
+
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Received incorrect address `%s'.\n",
+                inet_ntop (AF_INET,
+                           &sai->sin_addr,
+                           buf,
+                           sizeof(buf)));
+    GNUNET_break (0);
+  }
+}
+
+
+static void
+check_rootserver_ip (void *cls, const struct sockaddr *sa, socklen_t salen)
+{
+  int *ok = cls;
+  const struct sockaddr_in *sai = (const struct sockaddr_in *) sa;
+
+  if (NULL == sa)
+    return;
+  GNUNET_assert (sizeof(struct sockaddr_in) == salen);
+
+  if (0 == strcmp (inet_ntoa (sai->sin_addr), ROOTSERVER_IP))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Received correct rootserver ip address.\n");
+    (*ok) &= ~1;
+  }
+  else
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Received incorrect rootserver ip address.\n");
+    GNUNET_break (0);
+  }
+}
+
+
+static void
+check_rootserver_name (void *cls,
+                       const char *hostname)
+{
+  int *ok = cls;
+
+  if (NULL == hostname)
+    return;
+
+  if (0 == strcmp (hostname, ROOTSERVER_NAME))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Received correct rootserver hostname `%s'.\n",
+                hostname);
+    (*ok) &= ~2;
+  }
+  else
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                "Received invalid rootserver hostname `%s', expected `%s'\n",
+                hostname,
+                ROOTSERVER_NAME);
+    GNUNET_break (disable_rootserver_check);
+  }
+}
+
+
+static void
+run (void *cls, char *const *args, const char *cfgfile,
+     const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+  int *ok = cls;
+  struct sockaddr_in sa;
+  struct GNUNET_TIME_Relative timeout =
+    GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30);
+  int count_ips = 0;
+  char *own_fqdn;
+  const char *rootserver_name = ROOTSERVER_NAME;
+  struct hostent *rootserver;
+  struct in_addr rootserver_addr;
+
+  memset (&sa, 0, sizeof(sa));
+  sa.sin_family = AF_INET;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+  sa.sin_len = (u_char) sizeof(sa);
+#endif
+  sa.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
+
+  /*
+   * Looking up our own fqdn
+   */
+  own_fqdn = GNUNET_RESOLVER_local_fqdn_get ();
+  /* can't really check, only thing we can safely
+     compare against is our own identical logic... */
+  GNUNET_free (own_fqdn);
+
+  /*
+   * Testing non-local DNS resolution
+   * DNS rootserver to test: a.root-servers.net - 198.41.0.4
+   */
+
+  rootserver = gethostbyname (rootserver_name);
+  if (NULL == rootserver)
+  {
+    /* Error: resolving ip addresses does not work */
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                _ ("gethostbyname() could not lookup IP address: %s\n"),
+                hstrerror (h_errno));
+    fprintf (stderr,
+             "%s",
+             "System seems to be off-line, will not run all DNS tests\n");
+    *ok = 0;                    /* mark test as passing anyway */
+    return;
+  }
+
+  /* Counting returned IP addresses */
+  while (NULL != rootserver->h_addr_list[count_ips])
+    count_ips++;
+  if (count_ips > 1)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "IP received range for root name server, but a root name server has only 1 IP\n");
+    GNUNET_break (0);
+  }
+
+  /* Comparing to resolved address to the address the root name server should have */
+  if (0 !=
+      strcmp (inet_ntoa (*(struct in_addr *) rootserver->h_addr_list[0]),
+              ROOTSERVER_IP))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "IP received and IP for root name server differ\n");
+    GNUNET_break (0);
+  }
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "System's own forward name resolution is working\n");
+  /* Resolve the same using GNUNET */
+  GNUNET_RESOLVER_ip_get (ROOTSERVER_NAME, AF_INET, timeout,
+                          &check_rootserver_ip, cls);
+  GNUNET_RESOLVER_ip_get (ROOTSERVER_NAME, AF_INET, timeout,
+                          &check_rootserver_ip, cls);
+
+  /*
+   * Success: forward lookups work as expected
+   * Next step: reverse lookups
+   */
+  if (1 != inet_pton (AF_INET,
+                      ROOTSERVER_IP,
+                      &rootserver_addr))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Could not transform root name server IP address\n");
+    GNUNET_break (0);
+  }
+
+  rootserver =
+    gethostbyaddr ((const void *) &rootserver_addr,
+                   sizeof(rootserver_addr),
+                   AF_INET);
+  if (NULL == rootserver)
+  {
+    /* Error: resolving IP addresses does not work */
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                "gethostbyaddr() could not lookup hostname: %s\n",
+                hstrerror (h_errno));
+    disable_rootserver_check = GNUNET_YES;
+  }
+  else
+  {
+    if (0 != strcmp (rootserver->h_name,
+                     ROOTSERVER_NAME))
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                  "Received hostname and hostname for root name server differ\n");
+      disable_rootserver_check = GNUNET_YES;
+    }
+  }
+
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "System's own reverse name resolution is working\n");
+  /* Resolve the same using GNUNET */
+  memset (&sa, 0, sizeof(sa));
+  sa.sin_family = AF_INET;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+  sa.sin_len = (u_char) sizeof(sa);
+#endif
+  inet_aton (ROOTSERVER_IP, &sa.sin_addr);
+
+  GNUNET_RESOLVER_hostname_get ((const struct sockaddr *) &sa,
+                                sizeof(struct sockaddr), GNUNET_YES, timeout,
+                                &check_rootserver_name, cls);
+
+  memset (&sa, 0, sizeof(sa));
+  sa.sin_family = AF_INET;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+  sa.sin_len = (u_char) sizeof(sa);
+#endif
+  sa.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
+
+  GNUNET_RESOLVER_ip_get ("localhost", AF_INET, timeout, &check_127, cls);
+  GNUNET_RESOLVER_hostname_get ((const struct sockaddr *) &sa,
+                                sizeof(struct sockaddr), GNUNET_YES, timeout,
+                                &check_localhost, cls);
+
+  GNUNET_RESOLVER_hostname_get ((const struct sockaddr *) &sa,
+                                sizeof(struct sockaddr), GNUNET_NO, timeout,
+                                &check_localhost_num, cls);
+  GNUNET_RESOLVER_hostname_resolve (AF_UNSPEC, timeout, &check_hostname, cls);
+}
+
+
+int
+main (int argc, char *argv[])
+{
+  int ok = 1 + 2 + 4 + 8;
+  char *fn;
+  struct GNUNET_OS_Process *proc;
+  char *const argvx[] = {
+    "test-resolver-api", "-c", "test_resolver_api_data.conf", NULL
+  };
+  struct GNUNET_GETOPT_CommandLineOption options[] =
+  { GNUNET_GETOPT_OPTION_END };
+
+  GNUNET_log_setup ("test-resolver-api",
+                    "WARNING",
+                    NULL);
+  fn = GNUNET_OS_get_libexec_binary_path ("gnunet-service-resolver");
+  proc = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_OUT_AND_ERR
+                                  | GNUNET_OS_USE_PIPE_CONTROL,
+                                  NULL, NULL, NULL,
+                                  fn,
+                                  "gnunet-service-resolver",
+                                  "-c", "test_resolver_api_data.conf", NULL);
+  GNUNET_assert (NULL != proc);
+  GNUNET_free (fn);
+  GNUNET_assert (GNUNET_OK ==
+                 GNUNET_PROGRAM_run ((sizeof(argvx) / sizeof(char *)) - 1,
+                                     argvx, "test-resolver-api", "nohelp",
+                                     options, &run, &ok));
+  if (0 != GNUNET_OS_process_kill (proc, GNUNET_TERM_SIG))
+  {
+    GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "kill");
+    ok = 1;
+  }
+  GNUNET_OS_process_wait (proc);
+  GNUNET_OS_process_destroy (proc);
+  proc = NULL;
+  if (0 != ok)
+    fprintf (stderr, "Missed some resolutions: %u\n", ok);
+  return ok;
+}
+
+
+/* end of test_resolver_api.c */