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/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#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/fake/fake_resolver.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/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("fake");
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;
gpr_event ev;
} on_resolution_arg;
void on_resolution_cb(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
on_resolution_arg* res = arg;
// 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);
gpr_event_set(&res->ev, (void*)1);
}
static void test_fake_resolver() {
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_combiner* combiner = grpc_combiner_create();
// 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;
gpr_event_init(&on_res_arg.ev);
grpc_closure* on_resolution = GRPC_CLOSURE_CREATE(
on_resolution_cb, &on_res_arg, grpc_combiner_scheduler(combiner));
// 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(gpr_event_wait(&on_res_arg.ev,
grpc_timeout_seconds_to_deadline(5)) != NULL);
// 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;
gpr_event_init(&on_res_arg_update.ev);
on_resolution = GRPC_CLOSURE_CREATE(on_resolution_cb, &on_res_arg_update,
grpc_combiner_scheduler(combiner));
// 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(gpr_event_wait(&on_res_arg_update.ev,
grpc_timeout_seconds_to_deadline(5)) != NULL);
// 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(gpr_event_wait(&on_res_arg.ev,
grpc_timeout_milliseconds_to_deadline(100)) ==
NULL);
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_init();
test_fake_resolver();
grpc_shutdown();
return 0;
}
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