Add async resolver tests

Add some basic unit tests of the async resolver module.
One of the tests resolves a name on the Internet, therefore it is
off by default and is turned on with the -n switch.

2 files changed, 455 insertions, 1 deletions

diff --git a/server/Makefile.am b/server/Makefile.am
index 4ee344bbd..4398259b5 100644
--- a/server/Makefile.am
+++ b/server/Makefile.am
@@ -52,7 +52,8 @@ sssdlibexec_PROGRAMS = \
 if BUILD_TESTS
 noinst_PROGRAMS = \
     sysdb-tests \
-    stress-tests
+    stress-tests \
+    resolv-tests
 endif
 
 sssdlib_LTLIBRARIES = \
@@ -328,6 +329,17 @@ stress_tests_SOURCES = \
 stress_tests_LDADD = \
     $(SSSD_LIBS)
 
+resolv_tests_SOURCES = \
+    tests/resolv-tests.c \
+    $(SSSD_UTIL_OBJ) \
+    $(SSSD_RESOLV_OBJ)
+resolv_tests_CFLAGS = \
+    $(CHECK_CFLAGS)
+resolv_tests_LDADD = \
+    $(SSSD_LIBS) \
+    $(CHECK_LIBS) \
+    $(CARES_LIBS)
+
 endif #BUILD_TESTS
 
 ####################
diff --git a/server/tests/resolv-tests.c b/server/tests/resolv-tests.c
new file mode 100644
index 000000000..4b3a19e3d
--- /dev/null
+++ b/server/tests/resolv-tests.c
@@ -0,0 +1,442 @@
+/*
+   SSSD
+
+   Async resolver tests
+
+   Authors:
+        Martin Nagy <mnagy@redhat.com>
+        Jakub Hrozek <jhrozek@redhat.com>
+
+   Copyright (C) Red Hat, Inc 2009
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdlib.h>
+#include <check.h>
+#include <talloc.h>
+#include <tevent.h>
+#include <popt.h>
+#include <arpa/inet.h>
+
+#include "util/util.h"
+
+/* Interface under test */
+#include "resolv/async_resolv.h"
+
+#ifndef tevent_req_set_callback
+#define tevent_req_set_callback(req, func, data) \
+    do { req->async.fn = func; req->async.private_data = data; } while(0)
+#endif
+
+#ifndef tevent_req_callback_data
+#define tevent_req_callback_data(req, type) ((type *)req->async.private_data)
+#endif
+
+int use_net_test;
+
+struct resolv_test_ctx {
+    struct tevent_context *ev;
+    struct resolv_ctx *resolv;
+
+    int error;
+    bool done;
+};
+
+static int setup_resolv_test(struct resolv_test_ctx **ctx)
+{
+    struct resolv_test_ctx *test_ctx;
+    int ret;
+
+    test_ctx = talloc_zero(NULL, struct resolv_test_ctx);
+    if (test_ctx == NULL) {
+        fail("Could not allocate memory for test context");
+        talloc_free(test_ctx);
+        return ENOMEM;
+    }
+
+    test_ctx->ev = tevent_context_init(NULL);
+    if (test_ctx->ev == NULL) {
+        fail("Could not init tevent context");
+        talloc_free(test_ctx);
+        return EFAULT;
+    }
+
+    ret = resolv_init(NULL, test_ctx->ev, &test_ctx->resolv);
+    if (ret != EOK) {
+        fail("Could not init resolv context");
+        talloc_free(test_ctx);
+        return ret;
+    }
+
+    *ctx = test_ctx;
+    return EOK;
+}
+
+static int test_loop(struct resolv_test_ctx *data)
+{
+    while (!data->done)
+        tevent_loop_once(data->ev);
+
+    return data->error;
+}
+
+static void test_localhost(struct tevent_req *req)
+{
+     int recv_status;
+     int status;
+     const struct hostent *hostent;
+     int i;
+     struct resolv_test_ctx *test_ctx = tevent_req_callback_data(req,
+                                                                 struct resolv_test_ctx);
+
+     test_ctx->done = true;
+
+     recv_status = resolv_gethostbyname_recv(req, &status, NULL, &hostent);
+     if (recv_status != EOK) {
+         DEBUG(2, ("resolv_gethostbyname_recv failed: %d\n", recv_status));
+         test_ctx->error = recv_status;
+         return;
+     }
+     DEBUG(7, ("resolv_gethostbyname_recv status: %d\n", status));
+
+     test_ctx->error = ENOENT;
+     for (i = 0; hostent->h_addr_list[i]; i++) {
+         char addr_buf[256];
+         inet_ntop(hostent->h_addrtype, hostent->h_addr_list[i], addr_buf, sizeof(addr_buf));
+
+         /* test that localhost resolves to 127.0.0.1 or ::1 */
+         if (strcmp(addr_buf, "127.0.0.1") == 0 || strcmp(addr_buf, "::1") == 0) {
+             test_ctx->error = EOK;
+         }
+     }
+}
+
+START_TEST(test_resolv_localhost)
+{
+    struct resolv_test_ctx *test_ctx;
+    int ret = EOK;
+    struct tevent_req *req;
+    const char *hostname = "localhost.localdomain";
+
+    ret = setup_resolv_test(&test_ctx);
+    if (ret != EOK) {
+        fail("Could not set up test");
+        return;
+    }
+
+    req = resolv_gethostbyname_send(test_ctx->ev, test_ctx->ev, test_ctx->resolv, hostname, AF_INET);
+    DEBUG(7, ("Sent resolv_gethostbyname\n"));
+    if (req == NULL) {
+        ret = ENOMEM;
+    }
+
+    if (ret == EOK) {
+        tevent_req_set_callback(req, test_localhost, test_ctx);
+        ret = test_loop(test_ctx);
+    }
+
+    fail_unless(ret == EOK);
+
+    talloc_zfree(test_ctx);
+}
+END_TEST
+
+static void test_negative(struct tevent_req *req)
+{
+     int recv_status;
+     int status;
+     const struct hostent *hostent;
+     struct resolv_test_ctx *test_ctx;
+
+     test_ctx = tevent_req_callback_data(req, struct resolv_test_ctx);
+     test_ctx->done = true;
+
+     recv_status = resolv_gethostbyname_recv(req, &status, NULL, &hostent);
+     if (recv_status == EOK) {
+         DEBUG(7, ("resolv_gethostbyname_recv succeeded in a negative test"));
+         return;
+     }
+
+     test_ctx->error = status;
+     DEBUG(2, ("resolv_gethostbyname_recv status: %d: %s\n", status, resolv_strerror(status)));
+}
+
+START_TEST(test_resolv_negative)
+{
+    int ret = EOK;
+    struct tevent_req *req;
+    const char *hostname = "sssd.foo";
+    struct resolv_test_ctx *test_ctx;
+
+    ret = setup_resolv_test(&test_ctx);
+    if (ret != EOK) {
+        fail("Could not set up test");
+        return;
+    }
+
+    req = resolv_gethostbyname_send(test_ctx->ev, test_ctx->ev, test_ctx->resolv, hostname, AF_INET);
+    DEBUG(7, ("Sent resolv_gethostbyname\n"));
+    if (req == NULL) {
+        ret = ENOMEM;
+    }
+
+    if (ret == EOK) {
+        tevent_req_set_callback(req, test_negative, test_ctx);
+        ret = test_loop(test_ctx);
+    }
+
+    fail_unless(ret != EOK);
+    fail_unless(test_ctx->error == ARES_ENOTFOUND);
+    talloc_zfree(test_ctx);
+}
+END_TEST
+
+static void test_internet(struct tevent_req *req)
+{
+     int recv_status;
+     int status;
+     const struct hostent *hostent;
+     struct resolv_test_ctx *test_ctx = tevent_req_callback_data(req,
+                                                                 struct resolv_test_ctx);
+
+     test_ctx->done = true;
+
+     recv_status = resolv_gethostbyname_recv(req, &status, NULL, &hostent);
+     if (recv_status != EOK) {
+         DEBUG(2, ("resolv_gethostbyname_recv failed: %d\n", recv_status));
+         test_ctx->error = recv_status;
+         return;
+     }
+     DEBUG(7, ("resolv_gethostbyname_recv status: %d\n", status));
+
+     test_ctx->error = (hostent->h_length == 0) ? ENOENT : EOK;
+}
+
+START_TEST(test_resolv_internet)
+{
+    int ret = EOK;
+    struct tevent_req *req;
+    const char *hostname = "redhat.com";
+    struct resolv_test_ctx *test_ctx;
+
+    ret = setup_resolv_test(&test_ctx);
+    if (ret != EOK) {
+        fail("Could not set up test");
+        return;
+    }
+
+    req = resolv_gethostbyname_send(test_ctx->ev, test_ctx->ev, test_ctx->resolv, hostname, AF_INET);
+    DEBUG(7, ("Sent resolv_gethostbyname\n"));
+    if (req == NULL) {
+        ret = ENOMEM;
+    }
+
+    if (ret == EOK) {
+        tevent_req_set_callback(req, test_internet, test_ctx);
+        ret = test_loop(test_ctx);
+    }
+
+    fail_unless(ret == EOK);
+    talloc_zfree(test_ctx);
+}
+END_TEST
+
+static void resolv_free_context(struct tevent_context *ev,
+                                struct tevent_timer *te,
+                                struct timeval t, void *ptr)
+{
+    struct resolv_ctx *rctx = talloc_get_type(ptr, struct resolv_ctx);
+    DEBUG(7, ("freeing the context\n"));
+
+    talloc_free(rctx);
+}
+
+static void resolv_free_done(struct tevent_context *ev,
+                             struct tevent_timer *te,
+                             struct timeval t, void *ptr)
+{
+    struct resolv_test_ctx *tctx = talloc_get_type(ptr, struct resolv_test_ctx);
+    DEBUG(7, ("marking test as done\n"));
+
+    tctx->error = EOK;
+    tctx->done = true;
+}
+
+START_TEST(test_resolv_free_context)
+{
+    int ret = EOK;
+    struct tevent_req *req;
+    const char *hostname = "redhat.com";
+    struct resolv_test_ctx *test_ctx;
+    struct tevent_timer *free_timer, *terminate_timer;
+    struct timeval free_tv, terminate_tv;
+
+    ret = setup_resolv_test(&test_ctx);
+    if (ret != EOK) {
+        fail("Could not set up test");
+        return;
+    }
+
+    req = resolv_gethostbyname_send(test_ctx, test_ctx->ev, test_ctx->resolv, hostname, AF_INET);
+    DEBUG(7, ("Sent resolv_gethostbyname\n"));
+    if (req == NULL) {
+        fail("Error calling resolv_gethostbyname_send");
+        return;
+    }
+
+    gettimeofday(&free_tv, NULL);
+    free_tv.tv_sec += 1;
+    free_tv.tv_usec = 0;
+    terminate_tv.tv_sec  = free_tv.tv_sec + 1;
+    terminate_tv.tv_usec = 0;
+
+    free_timer = tevent_add_timer(test_ctx->ev, test_ctx, free_tv, resolv_free_context, test_ctx->resolv);
+    if (free_timer == NULL) {
+        fail("Error calling tevent_add_timer");
+        return;
+    }
+
+    terminate_timer = tevent_add_timer(test_ctx->ev, test_ctx, terminate_tv, resolv_free_done, test_ctx);
+    if (terminate_timer == NULL) {
+        fail("Error calling tevent_add_timer");
+        return;
+    }
+
+    ret = test_loop(test_ctx);
+    fail_unless(ret == EOK);
+
+    talloc_zfree(test_ctx);
+}
+END_TEST
+
+static void resolv_free_req(struct tevent_context *ev,
+                            struct tevent_timer *te,
+                            struct timeval t, void *ptr)
+{
+    struct tevent_req *req = talloc_get_type(ptr, struct tevent_req);
+    DEBUG(7, ("freeing the request\n"));
+
+    talloc_free(req);
+}
+
+START_TEST(test_resolv_free_req)
+{
+    int ret = EOK;
+    struct tevent_req *req;
+    const char *hostname = "redhat.com";
+    struct resolv_test_ctx *test_ctx;
+    struct tevent_timer *free_timer, *terminate_timer;
+    struct timeval free_tv, terminate_tv;
+
+    ret = setup_resolv_test(&test_ctx);
+    if (ret != EOK) {
+        fail("Could not set up test");
+        return;
+    }
+
+    req = resolv_gethostbyname_send(test_ctx, test_ctx->ev, test_ctx->resolv, hostname, AF_INET);
+    DEBUG(7, ("Sent resolv_gethostbyname\n"));
+    if (req == NULL) {
+        fail("Error calling resolv_gethostbyname_send");
+        return;
+    }
+
+    gettimeofday(&free_tv, NULL);
+    free_tv.tv_sec += 1;
+    free_tv.tv_usec = 0;
+    terminate_tv.tv_sec  = free_tv.tv_sec + 1;
+    terminate_tv.tv_usec = 0;
+
+    free_timer = tevent_add_timer(test_ctx->ev, test_ctx, free_tv, resolv_free_req, req);
+    if (free_timer == NULL) {
+        fail("Error calling tevent_add_timer");
+        return;
+    }
+
+    terminate_timer = tevent_add_timer(test_ctx->ev, test_ctx, terminate_tv, resolv_free_done, test_ctx);
+    if (terminate_timer == NULL) {
+        fail("Error calling tevent_add_timer");
+        return;
+    }
+
+    ret = test_loop(test_ctx);
+    fail_unless(ret == EOK);
+
+    talloc_zfree(test_ctx);
+}
+END_TEST
+
+Suite *create_resolv_suite(void)
+{
+    Suite *s = suite_create("resolv");
+
+    TCase *tc_resolv = tcase_create("RESOLV Tests");
+
+    /* Do some testing */
+    tcase_add_test(tc_resolv, test_resolv_localhost);
+    tcase_add_test(tc_resolv, test_resolv_negative);
+    if (use_net_test) {
+        tcase_add_test(tc_resolv, test_resolv_internet);
+    }
+    tcase_add_test(tc_resolv, test_resolv_free_context);
+    tcase_add_test(tc_resolv, test_resolv_free_req);
+
+    /* Add all test cases to the test suite */
+    suite_add_tcase(s, tc_resolv);
+
+    return s;
+}
+
+int main(int argc, const char *argv[])
+{
+    int opt;
+    poptContext pc;
+    int failure_count;
+    Suite *resolv_suite;
+    SRunner *sr;
+    int debug;
+
+    struct poptOption long_options[] = {
+        POPT_AUTOHELP
+        { "debug-level", 'd', POPT_ARG_INT, &debug, 0, "Set debug level", NULL },
+        { "use-net-test", 'n', POPT_ARG_NONE, 0, 'n', "Run tests that need an active internet connection", NULL },
+        POPT_TABLEEND
+    };
+
+    pc = poptGetContext(argv[0], argc, argv, long_options, 0);
+    while((opt = poptGetNextOpt(pc)) != -1) {
+        switch(opt) {
+        case 'n':
+            use_net_test = 1;
+            break;
+
+        default:
+            fprintf(stderr, "\nInvalid option %s: %s\n\n",
+                    poptBadOption(pc, 0), poptStrerror(opt));
+            poptPrintUsage(pc, stderr, 0);
+            return 1;
+        }
+    }
+    poptFreeContext(pc);
+    debug_level = debug;
+
+    resolv_suite = create_resolv_suite();
+    sr = srunner_create(resolv_suite);
+    srunner_run_all(sr, CK_VERBOSE);
+    failure_count = srunner_ntests_failed(sr);
+    srunner_free(sr);
+    return (failure_count==0 ? EXIT_SUCCESS : EXIT_FAILURE);
+}
+