/* * * Copyright 2017, Google Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 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. * * Neither the name of Google Inc. nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT * OWNER 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 #include #include #include #include "src/core/ext/filters/client_channel/lb_policy_factory.h" #include "src/core/ext/filters/client_channel/parse_address.h" #include "src/core/ext/filters/client_channel/resolver_registry.h" #include "src/core/lib/channel/channel_args.h" #include "src/core/lib/iomgr/combiner.h" #include "src/core/lib/security/credentials/fake/fake_credentials.h" #include "test/core/end2end/fake_resolver.h" #include "test/core/util/test_config.h" static grpc_resolver *build_fake_resolver( grpc_exec_ctx *exec_ctx, grpc_combiner *combiner, grpc_fake_resolver_response_generator *response_generator) { grpc_resolver_factory *factory = grpc_resolver_factory_lookup("test"); grpc_arg generator_arg = grpc_fake_resolver_response_generator_arg(response_generator); grpc_resolver_args args; memset(&args, 0, sizeof(args)); grpc_channel_args channel_args = {1, &generator_arg}; args.args = &channel_args; args.combiner = combiner; grpc_resolver *resolver = grpc_resolver_factory_create_resolver(exec_ctx, factory, &args); grpc_resolver_factory_unref(factory); return resolver; } typedef struct on_resolution_arg { grpc_channel_args *resolver_result; grpc_channel_args *expected_resolver_result; bool was_called; } on_resolution_arg; void on_resolution_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) { on_resolution_arg *res = arg; res->was_called = true; // We only check the addresses channel arg because that's the only one // explicitly set by the test via // grpc_fake_resolver_response_generator_set_response. const grpc_lb_addresses *actual_lb_addresses = grpc_lb_addresses_find_channel_arg(res->resolver_result); const grpc_lb_addresses *expected_lb_addresses = grpc_lb_addresses_find_channel_arg(res->expected_resolver_result); GPR_ASSERT( grpc_lb_addresses_cmp(actual_lb_addresses, expected_lb_addresses) == 0); grpc_channel_args_destroy(exec_ctx, res->resolver_result); grpc_channel_args_destroy(exec_ctx, res->expected_resolver_result); } static void test_fake_resolver() { grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; grpc_combiner *combiner = grpc_combiner_create(NULL); // Create resolver. grpc_fake_resolver_response_generator *response_generator = grpc_fake_resolver_response_generator_create(); grpc_resolver *resolver = build_fake_resolver(&exec_ctx, combiner, response_generator); GPR_ASSERT(resolver != NULL); // Setup expectations. grpc_uri *uris[] = {grpc_uri_parse(&exec_ctx, "ipv4:10.2.1.1:1234", true), grpc_uri_parse(&exec_ctx, "ipv4:127.0.0.1:4321", true)}; char *balancer_names[] = {"name1", "name2"}; const bool is_balancer[] = {true, false}; grpc_lb_addresses *addresses = grpc_lb_addresses_create(3, NULL); for (size_t i = 0; i < GPR_ARRAY_SIZE(uris); ++i) { grpc_lb_addresses_set_address_from_uri( addresses, i, uris[i], is_balancer[i], balancer_names[i], NULL); grpc_uri_destroy(uris[i]); } const grpc_arg addresses_arg = grpc_lb_addresses_create_channel_arg(addresses); grpc_channel_args *results = grpc_channel_args_copy_and_add(NULL, &addresses_arg, 1); grpc_lb_addresses_destroy(&exec_ctx, addresses); on_resolution_arg on_res_arg; memset(&on_res_arg, 0, sizeof(on_res_arg)); on_res_arg.expected_resolver_result = results; grpc_closure *on_resolution = grpc_closure_create( on_resolution_cb, &on_res_arg, grpc_combiner_scheduler(combiner, false)); // Set resolver results and trigger first resolution. on_resolution_cb // performs the checks. grpc_fake_resolver_response_generator_set_response( &exec_ctx, response_generator, results); grpc_resolver_next_locked(&exec_ctx, resolver, &on_res_arg.resolver_result, on_resolution); grpc_exec_ctx_flush(&exec_ctx); GPR_ASSERT(on_res_arg.was_called); // Setup update. grpc_uri *uris_update[] = { grpc_uri_parse(&exec_ctx, "ipv4:192.168.1.0:31416", true)}; char *balancer_names_update[] = {"name3"}; const bool is_balancer_update[] = {false}; grpc_lb_addresses *addresses_update = grpc_lb_addresses_create(1, NULL); for (size_t i = 0; i < GPR_ARRAY_SIZE(uris_update); ++i) { grpc_lb_addresses_set_address_from_uri(addresses_update, i, uris_update[i], is_balancer_update[i], balancer_names_update[i], NULL); grpc_uri_destroy(uris_update[i]); } grpc_arg addresses_update_arg = grpc_lb_addresses_create_channel_arg(addresses_update); grpc_channel_args *results_update = grpc_channel_args_copy_and_add(NULL, &addresses_update_arg, 1); grpc_lb_addresses_destroy(&exec_ctx, addresses_update); // Setup expectations for the update. on_resolution_arg on_res_arg_update; memset(&on_res_arg_update, 0, sizeof(on_res_arg_update)); on_res_arg_update.expected_resolver_result = results_update; on_resolution = grpc_closure_create(on_resolution_cb, &on_res_arg_update, grpc_combiner_scheduler(combiner, false)); // Set updated resolver results and trigger a second resolution. grpc_fake_resolver_response_generator_set_response( &exec_ctx, response_generator, results_update); grpc_resolver_next_locked(&exec_ctx, resolver, &on_res_arg_update.resolver_result, on_resolution); grpc_exec_ctx_flush(&exec_ctx); GPR_ASSERT(on_res_arg.was_called); // Requesting a new resolution without re-senting the response shouldn't // trigger the resolution callback. memset(&on_res_arg, 0, sizeof(on_res_arg)); grpc_resolver_next_locked(&exec_ctx, resolver, &on_res_arg.resolver_result, on_resolution); grpc_exec_ctx_flush(&exec_ctx); GPR_ASSERT(!on_res_arg.was_called); GRPC_COMBINER_UNREF(&exec_ctx, combiner, "test_fake_resolver"); GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test_fake_resolver"); grpc_exec_ctx_finish(&exec_ctx); grpc_fake_resolver_response_generator_unref(response_generator); } int main(int argc, char **argv) { grpc_test_init(argc, argv); grpc_fake_resolver_init(); // Registers the "test" scheme. grpc_init(); test_fake_resolver(); grpc_shutdown(); return 0; }