RESPONDERS: Add a new request sss_parse_inp_send

The responders were copying code to parse input and on encountering an
uknown domain, send the discover subdomain request. This patch adds a
reusable request that can always be called in responders and in case the
name can be parsed, just shortcut.

Reviewed-by: Pavel Březina <pbrezina@redhat.com>
(cherry picked from commit 7caf7ed4f2eae1ec1c0717b4ee6ce78bdacd5926)

Conflicts:
	Makefile.am

8 files changed, 483 insertions, 1 deletions

diff --git a/Makefile.am b/Makefile.am
index 3996a9054..1aef2647b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -162,6 +162,7 @@ if HAVE_CMOCKA
         ad_access_filter_tests \
         ad_common_tests \
         dp_opt_tests \
+        responder-get-domains-tests \
         test_search_bases
 endif
 
@@ -1388,6 +1389,22 @@ nss_srv_tests_LDADD = \
     libsss_test_common.la \
     libsss_idmap.la
 
+EXTRA_responder_get_domains_tests_DEPENDENCIES = \
+     $(ldblib_LTLIBRARIES)
+responder_get_domains_tests_SOURCES = \
+     src/responder/common/responder_get_domains.c \
+     src/tests/cmocka/test_responder_common.c \
+     src/tests/cmocka/common_mock_resp.c
+responder_get_domains_tests_CFLAGS = \
+    $(AM_CFLAGS)
+responder_get_domains_tests_LDFLAGS = \
+    -Wl,-wrap,sss_parse_name_for_domains
+responder_get_domains_tests_LDADD = \
+    $(CMOCKA_LIBS) \
+    $(SSSD_LIBS) \
+    $(SSSD_INTERNAL_LTLIBS) \
+    libsss_test_common.la
+
 test_find_uid_DEPENDENCIES = \
     $(ldblib_LTLIBRARIES)
 test_find_uid_SOURCES = \
diff --git a/src/responder/common/responder.h b/src/responder/common/responder.h
index 44249b007..c2440b132 100644
--- a/src/responder/common/responder.h
+++ b/src/responder/common/responder.h
@@ -311,4 +311,11 @@ errno_t csv_string_to_uid_array(TALLOC_CTX *mem_ctx, const char *cvs_string,
 
 errno_t check_allowed_uids(uid_t uid, size_t allowed_uids_count,
                            uid_t *allowed_uids);
+
+struct tevent_req *
+sss_parse_inp_send(TALLOC_CTX *mem_ctx, struct resp_ctx *rctx,
+                   const char *rawinp);
+errno_t sss_parse_inp_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+                           char **_name, char **_domname);
+
 #endif /* __SSS_RESPONDER_H__ */
diff --git a/src/responder/common/responder_get_domains.c b/src/responder/common/responder_get_domains.c
index 23b274b52..253728b26 100644
--- a/src/responder/common/responder_get_domains.c
+++ b/src/responder/common/responder_get_domains.c
@@ -421,3 +421,124 @@ errno_t schedule_get_domains_task(TALLOC_CTX *mem_ctx,
 
     return EOK;
 }
+
+struct sss_parse_inp_state {
+    struct resp_ctx *rctx;
+    const char *rawinp;
+
+    char *name;
+    char *domname;
+};
+
+static void sss_parse_inp_done(struct tevent_req *subreq);
+
+struct tevent_req *
+sss_parse_inp_send(TALLOC_CTX *mem_ctx, struct resp_ctx *rctx,
+                   const char *rawinp)
+{
+    errno_t ret;
+    struct tevent_req *req;
+    struct tevent_req *subreq;
+    struct sss_parse_inp_state *state;
+
+    req = tevent_req_create(mem_ctx, &state, struct sss_parse_inp_state);
+    if (req == NULL) {
+         return NULL;
+    }
+    state->rawinp = rawinp;
+    state->rctx = rctx;
+
+    /* If the subdomains haven't been checked yet, we need to always
+     * attach to the post-startup subdomain request and only then parse
+     * the input. Otherwise, we might not be able to parse input with a
+     * flat domain name specifier */
+    if (rctx->get_domains_last_call.tv_sec > 0) {
+        ret = sss_parse_name_for_domains(state, rctx->domains,
+                                         rctx->default_domain, rawinp,
+                                         &state->domname, &state->name);
+        if (ret == EOK) {
+            /* Was able to use cached domains */
+            goto done;
+        } else if (ret != EAGAIN) {
+            DEBUG(SSSDBG_OP_FAILURE, "Invalid name received [%s]\n", rawinp);
+            ret = ERR_INPUT_PARSE;
+            goto done;
+        }
+    }
+
+    /* EAGAIN - check the DP for subdomains */
+
+    DEBUG(SSSDBG_FUNC_DATA, "Requesting info for [%s] from [%s]\n",
+          state->name, state->domname ? state->domname : "<ALL>");
+
+    /* We explicitly use force=false here. This request should decide itself
+     * if it's time to re-use the cached subdomain list or refresh. If the
+     * caller needs to specify the 'force' parameter, they should use the
+     * sss_dp_get_domains_send() request itself
+     */
+    subreq = sss_dp_get_domains_send(state, rctx, false, state->domname);
+    if (subreq == NULL) {
+        ret = ENOMEM;
+        goto done;
+    }
+    tevent_req_set_callback(subreq, sss_parse_inp_done, req);
+    return req;
+
+done:
+    if (ret == EOK) {
+        tevent_req_done(req);
+    } else {
+        tevent_req_error(req, ret);
+    }
+    tevent_req_post(req, rctx->ev);
+    return req;
+}
+
+static void sss_parse_inp_done(struct tevent_req *subreq)
+{
+    errno_t ret;
+    struct tevent_req *req = tevent_req_callback_data(subreq,
+                                                      struct tevent_req);
+    struct sss_parse_inp_state *state = tevent_req_data(req,
+                                                struct sss_parse_inp_state);
+
+    ret = sss_dp_get_domains_recv(subreq);
+    talloc_free(subreq);
+    if (ret != EOK) {
+        tevent_req_error(req, ret);
+        return;
+    }
+
+    ret = sss_parse_name_for_domains(state, state->rctx->domains,
+                                     state->rctx->default_domain,
+                                     state->rawinp,
+                                     &state->domname, &state->name);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_OP_FAILURE,
+              "Invalid name received [%s]\n", state->rawinp);
+        tevent_req_error(req, ERR_INPUT_PARSE);
+        return;
+    }
+
+    /* Was able to parse the name now */
+    tevent_req_done(req);
+}
+
+errno_t sss_parse_inp_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+                           char **_name, char **_domname)
+{
+    struct sss_parse_inp_state *state = tevent_req_data(req,
+                                                struct sss_parse_inp_state);
+
+    TEVENT_REQ_RETURN_ON_ERROR(req);
+
+    if (_name) {
+        *_name = talloc_steal(mem_ctx, state->name);
+    }
+
+    if (_domname) {
+        *_domname = talloc_steal(mem_ctx, state->domname);
+    }
+
+    return EOK;
+}
diff --git a/src/tests/cmocka/common_mock_resp_dp.c b/src/tests/cmocka/common_mock_resp_dp.c
index 40fa7c94f..08d74179d 100644
--- a/src/tests/cmocka/common_mock_resp_dp.c
+++ b/src/tests/cmocka/common_mock_resp_dp.c
@@ -79,6 +79,22 @@ void mock_account_recv_simple(void)
     return mock_account_recv(0, 0, NULL, NULL, NULL);
 }
 
+struct tevent_req *
+sss_parse_inp_send(TALLOC_CTX *mem_ctx, struct resp_ctx *rctx,
+                   const char *rawinp)
+{
+    return test_req_succeed_send(mem_ctx, rctx->ev);
+}
+
+errno_t sss_parse_inp_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+                           char **_name, char **_domname)
+{
+    *_name = sss_mock_ptr_type(char *);
+    *_domname = sss_mock_ptr_type(char *);
+
+    return test_request_recv(req);
+}
+
 void mock_parse_inp(const char *name, const char *domname)
 {
     will_return(sss_parse_inp_recv, name);
diff --git a/src/tests/cmocka/test_nss_srv.c b/src/tests/cmocka/test_nss_srv.c
index e2e81a65f..3ef6da87c 100644
--- a/src/tests/cmocka/test_nss_srv.c
+++ b/src/tests/cmocka/test_nss_srv.c
@@ -4,7 +4,7 @@
 
     Copyright (C) 2013 Red Hat
 
-    SSSD tests: Common utilities for tests that exercise domains
+    SSSD tests: NSS responder tests
 
     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
diff --git a/src/tests/cmocka/test_responder_common.c b/src/tests/cmocka/test_responder_common.c
new file mode 100644
index 000000000..58aa32b5d
--- /dev/null
+++ b/src/tests/cmocka/test_responder_common.c
@@ -0,0 +1,319 @@
+/*
+    Authors:
+        Jakub Hrozek <jhrozek@redhat.com>
+
+    Copyright (C) 2014 Red Hat
+
+    SSSD tests: Common responder code tests
+
+    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 <talloc.h>
+#include <tevent.h>
+#include <errno.h>
+#include <popt.h>
+
+#include "tests/cmocka/common_mock.h"
+#include "tests/cmocka/common_mock_resp.h"
+
+#define TESTS_PATH "tests_responder"
+#define TEST_CONF_DB "test_responder_conf.ldb"
+#define TEST_DOM_NAME "responder_test"
+#define TEST_SYSDB_FILE "cache_"TEST_DOM_NAME".ldb"
+#define TEST_ID_PROVIDER "ldap"
+
+#define NAME "username"
+
+static void
+mock_sss_dp_done(struct tevent_context *ev,
+                 struct tevent_immediate *imm,
+                 void *pvt);
+
+errno_t
+sss_dp_issue_request(TALLOC_CTX *mem_ctx, struct resp_ctx *rctx,
+                     const char *strkey, struct sss_domain_info *dom,
+                     dbus_msg_constructor msg_create, void *pvt,
+                     struct tevent_req *nreq)
+{
+    struct tevent_immediate *imm;
+
+    imm = tevent_create_immediate(rctx->ev);
+    if (imm == NULL) {
+        return ENOMEM;
+    }
+    tevent_schedule_immediate(imm, rctx->ev, mock_sss_dp_done, nreq);
+    return EOK;
+}
+
+static void
+mock_sss_dp_done(struct tevent_context *ev,
+                 struct tevent_immediate *imm,
+                 void *pvt)
+{
+    struct tevent_req *req;
+
+    talloc_free(imm);
+    req = talloc_get_type(pvt, struct tevent_req);
+    tevent_req_done(req);
+}
+
+errno_t
+sss_dp_req_recv(TALLOC_CTX *mem_ctx,
+                struct tevent_req *sidereq,
+                dbus_uint16_t *dp_err,
+                dbus_uint32_t *dp_ret,
+                char **err_msg)
+{
+    return EOK;
+}
+
+struct parse_inp_test_ctx {
+    struct sss_test_ctx *tctx;
+    struct resp_ctx *rctx;
+};
+
+void parse_inp_test_setup(void **state)
+{
+    struct parse_inp_test_ctx *parse_inp_ctx;
+
+    check_leaks_push(global_talloc_context);
+
+    parse_inp_ctx = talloc_zero(global_talloc_context, struct parse_inp_test_ctx);
+    assert_non_null(parse_inp_ctx);
+
+    parse_inp_ctx->tctx = create_dom_test_ctx(parse_inp_ctx, TESTS_PATH,
+                                              TEST_CONF_DB, TEST_SYSDB_FILE, TEST_DOM_NAME,
+                                              TEST_ID_PROVIDER, NULL);
+    assert_non_null(parse_inp_ctx->tctx);
+
+    parse_inp_ctx->rctx = mock_rctx(parse_inp_ctx,
+                                    parse_inp_ctx->tctx->ev,
+                                    parse_inp_ctx->tctx->dom,
+                                    parse_inp_ctx);
+    assert_non_null(parse_inp_ctx->rctx);
+
+    /* Testing the request race condition should be a special case */
+    gettimeofday(&parse_inp_ctx->rctx->get_domains_last_call, NULL);
+
+    check_leaks_push(parse_inp_ctx);
+    *state = parse_inp_ctx;
+}
+
+void parse_inp_test_teardown(void **state)
+{
+    struct parse_inp_test_ctx *parse_inp_ctx = talloc_get_type(*state,
+                                                   struct parse_inp_test_ctx);
+
+    assert_true(check_leaks_pop(parse_inp_ctx) == true);
+
+    talloc_free(parse_inp_ctx);
+    assert_true(check_leaks_pop(global_talloc_context) == true);
+}
+
+int __real_sss_parse_name_for_domains(TALLOC_CTX *memctx,
+                                      struct sss_domain_info *domains,
+                                      const char *default_domain,
+                                      const char *orig, char **domain, char **name);
+
+int __wrap_sss_parse_name_for_domains(TALLOC_CTX *memctx,
+                                      struct sss_domain_info *domains,
+                                      const char *default_domain,
+                                      const char *orig, char **domain, char **name)
+{
+    enum sss_test_wrapper_call wtype = sss_mock_type(enum sss_test_wrapper_call);
+    errno_t ret;
+
+    if (wtype == WRAP_CALL_REAL) {
+        return __real_sss_parse_name_for_domains(memctx, domains,
+                                                 default_domain, orig,
+                                                 domain, name);
+    }
+
+    ret = sss_mock_type(errno_t);
+    return ret;
+}
+
+void parse_inp_simple_done(struct tevent_req *req)
+{
+    errno_t ret;
+    struct parse_inp_test_ctx *parse_inp_ctx =
+        tevent_req_callback_data(req, struct parse_inp_test_ctx);
+    char *name = NULL;
+    char *domname = NULL;
+
+    ret = sss_parse_inp_recv(req, parse_inp_ctx, &name, &domname);
+    parse_inp_ctx->tctx->done = true;
+    assert_int_equal(ret, EOK);
+    talloc_free(req);
+
+    assert_string_equal(name, NAME);
+    assert_null(domname);
+    talloc_free(name);
+}
+
+void parse_inp_simple(void **state)
+{
+    struct parse_inp_test_ctx *parse_inp_ctx = talloc_get_type(*state,
+                                                   struct parse_inp_test_ctx);
+    struct tevent_req *req;
+    errno_t ret;
+
+    will_return(__wrap_sss_parse_name_for_domains, WRAP_CALL_REAL);
+
+    req = sss_parse_inp_send(parse_inp_ctx, parse_inp_ctx->rctx, NAME);
+    assert_non_null(req);
+    tevent_req_set_callback(req, parse_inp_simple_done, parse_inp_ctx);
+
+    ret = test_ev_loop(parse_inp_ctx->tctx);
+    assert_int_equal(ret, EOK);
+}
+
+void parse_inp_call_dp(void **state)
+{
+    struct parse_inp_test_ctx *parse_inp_ctx = talloc_get_type(*state,
+                                                   struct parse_inp_test_ctx);
+    struct tevent_req *req;
+    errno_t ret;
+
+    /* First call will indicate we need to go to DP */
+    will_return(__wrap_sss_parse_name_for_domains, WRAP_CALL_WRAPPER);
+    will_return(__wrap_sss_parse_name_for_domains, EAGAIN);
+    /* The second one will succeed as the domains are up-to-date */
+    will_return(__wrap_sss_parse_name_for_domains, WRAP_CALL_REAL);
+
+    req = sss_parse_inp_send(parse_inp_ctx, parse_inp_ctx->rctx, NAME);
+    assert_non_null(req);
+    tevent_req_set_callback(req, parse_inp_simple_done, parse_inp_ctx);
+
+    ret = test_ev_loop(parse_inp_ctx->tctx);
+    assert_int_equal(ret, EOK);
+}
+
+void parse_inp_call_attach(void **state)
+{
+    struct parse_inp_test_ctx *parse_inp_ctx = talloc_get_type(*state,
+                                                   struct parse_inp_test_ctx);
+    struct tevent_req *req;
+    errno_t ret;
+
+    /* simulate responder startup */
+    parse_inp_ctx->rctx->get_domains_last_call.tv_sec = 0;
+
+    /* The first parse wouldn't be called, the second one will succeed
+     * as the domains are up-to-date */
+    will_return(__wrap_sss_parse_name_for_domains, WRAP_CALL_REAL);
+
+    req = sss_parse_inp_send(parse_inp_ctx, parse_inp_ctx->rctx, NAME);
+    assert_non_null(req);
+    tevent_req_set_callback(req, parse_inp_simple_done, parse_inp_ctx);
+
+    ret = test_ev_loop(parse_inp_ctx->tctx);
+    assert_int_equal(ret, EOK);
+}
+
+void parse_inp_neg_done(struct tevent_req *req)
+{
+    errno_t ret;
+    struct parse_inp_test_ctx *parse_inp_ctx =
+        tevent_req_callback_data(req, struct parse_inp_test_ctx);
+    char *name = NULL;
+    char *domname = NULL;
+
+    ret = sss_parse_inp_recv(req, parse_inp_ctx, &name, &domname);
+    parse_inp_ctx->tctx->done = true;
+    assert_int_equal(ret, ERR_INPUT_PARSE);
+    talloc_free(req);
+
+    assert_null(name);
+    assert_null(domname);
+}
+
+void parse_inp_call_neg(void **state)
+{
+    struct parse_inp_test_ctx *parse_inp_ctx = talloc_get_type(*state,
+                                                   struct parse_inp_test_ctx);
+    struct tevent_req *req;
+    errno_t ret;
+
+    /* Simulate an error */
+    will_return(__wrap_sss_parse_name_for_domains, WRAP_CALL_WRAPPER);
+    will_return(__wrap_sss_parse_name_for_domains, EINVAL);
+
+    req = sss_parse_inp_send(parse_inp_ctx, parse_inp_ctx->rctx, NAME);
+    assert_non_null(req);
+    tevent_req_set_callback(req, parse_inp_neg_done, parse_inp_ctx);
+
+    ret = test_ev_loop(parse_inp_ctx->tctx);
+    assert_int_equal(ret, EOK);
+}
+
+int main(int argc, const char *argv[])
+{
+    int rv;
+    int no_cleanup = 0;
+    poptContext pc;
+    int opt;
+    struct poptOption long_options[] = {
+        POPT_AUTOHELP
+        SSSD_DEBUG_OPTS
+        {"no-cleanup", 'n', POPT_ARG_NONE, &no_cleanup, 0,
+         _("Do not delete the test database after a test run"), NULL },
+        POPT_TABLEEND
+    };
+
+    const UnitTest tests[] = {
+        unit_test_setup_teardown(parse_inp_simple,
+                                 parse_inp_test_setup,
+                                 parse_inp_test_teardown),
+        unit_test_setup_teardown(parse_inp_call_dp,
+                                 parse_inp_test_setup,
+                                 parse_inp_test_teardown),
+        unit_test_setup_teardown(parse_inp_call_attach,
+                                 parse_inp_test_setup,
+                                 parse_inp_test_teardown),
+        unit_test_setup_teardown(parse_inp_call_neg,
+                                 parse_inp_test_setup,
+                                 parse_inp_test_teardown),
+    };
+
+    /* Set debug level to invalid value so we can deside if -d 0 was used. */
+    debug_level = SSSDBG_INVALID;
+
+    pc = poptGetContext(argv[0], argc, argv, long_options, 0);
+    while((opt = poptGetNextOpt(pc)) != -1) {
+        switch(opt) {
+        default:
+            fprintf(stderr, "\nInvalid option %s: %s\n\n",
+                    poptBadOption(pc, 0), poptStrerror(opt));
+            poptPrintUsage(pc, stderr, 0);
+            return 1;
+        }
+    }
+    poptFreeContext(pc);
+
+    DEBUG_INIT(debug_level);
+
+    /* Even though normally the tests should clean up after themselves
+     * they might not after a failed run. Remove the old db to be sure */
+    tests_set_cwd();
+    test_dom_suite_cleanup(TESTS_PATH, TEST_CONF_DB, TEST_SYSDB_FILE);
+    test_dom_suite_setup(TESTS_PATH);
+
+    rv = run_tests(tests);
+    if (rv == 0 && !no_cleanup) {
+        test_dom_suite_cleanup(TESTS_PATH, TEST_CONF_DB, TEST_SYSDB_FILE);
+    }
+    return rv;
+}
diff --git a/src/util/util_errors.c b/src/util/util_errors.c
index c9b507557..8dd4380b4 100644
--- a/src/util/util_errors.c
+++ b/src/util/util_errors.c
@@ -48,6 +48,7 @@ struct err_string error_to_str[] = {
     { "Dynamic DNS update failed" }, /* ERR_DYNDNS_FAILED */
     { "Dynamic DNS update timed out" }, /* ERR_DYNDNS_TIMEOUT */
     { "Dynamic DNS update not possible while offline" }, /* ERR_DYNDNS_OFFLINE */
+    { "Cannot parse input" }, /* ERR_INPUT_PARSE */
     { "Entry not found" }, /* ERR_NOT_FOUND */
     { "Domain not found" }, /* ERR_DOMAIN_NOT_FOUND */
     { "Missing configuration file" }, /* ERR_MISSING_CONF */
diff --git a/src/util/util_errors.h b/src/util/util_errors.h
index 3dd94af1f..23048990d 100644
--- a/src/util/util_errors.h
+++ b/src/util/util_errors.h
@@ -70,6 +70,7 @@ enum sssd_errors {
     ERR_DYNDNS_FAILED,
     ERR_DYNDNS_TIMEOUT,
     ERR_DYNDNS_OFFLINE,
+    ERR_INPUT_PARSE,
     ERR_NOT_FOUND,
     ERR_DOMAIN_NOT_FOUND,
     ERR_MISSING_CONF,