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//
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//
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// Copyright 2015-2016 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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//
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#include "test/cpp/util/create_test_channel.h"
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#include "absl/flags/flag.h"
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#include <grpc/support/log.h>
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#include <grpcpp/create_channel.h>
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#include <grpcpp/security/credentials.h>
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#include "src/core/lib/gprpp/crash.h"
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#include "test/cpp/util/test_credentials_provider.h"
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ABSL_FLAG(std::string, grpc_test_use_grpclb_with_child_policy, "",
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"If non-empty, set a static service config on channels created by "
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"grpc::CreateTestChannel, that configures the grpclb LB policy "
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"with a child policy being the value of this flag (e.g. round_robin "
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"or pick_first).");
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namespace grpc {
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namespace {
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const char kProdTlsCredentialsType[] = "prod_ssl";
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class SslCredentialProvider : public testing::CredentialTypeProvider {
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public:
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std::shared_ptr<ChannelCredentials> GetChannelCredentials(
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grpc::ChannelArguments* /*args*/) override {
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return grpc::SslCredentials(SslCredentialsOptions());
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}
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std::shared_ptr<ServerCredentials> GetServerCredentials() override {
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return nullptr;
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}
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};
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gpr_once g_once_init_add_prod_ssl_provider = GPR_ONCE_INIT;
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// Register ssl with non-test roots type to the credentials provider.
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void AddProdSslType() {
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testing::GetCredentialsProvider()->AddSecureType(
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kProdTlsCredentialsType, std::unique_ptr<testing::CredentialTypeProvider>(
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new SslCredentialProvider));
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}
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void MaybeSetCustomChannelArgs(grpc::ChannelArguments* args) {
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if (!absl::GetFlag(FLAGS_grpc_test_use_grpclb_with_child_policy).empty()) {
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args->SetString(
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"grpc.service_config",
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"{\"loadBalancingConfig\":[{\"grpclb\":{\"childPolicy\":[{"
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"\"" +
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absl::GetFlag(FLAGS_grpc_test_use_grpclb_with_child_policy) +
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"\":{}}]}}]}");
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}
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}
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} // namespace
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// When cred_type is 'ssl', if server is empty, override_hostname is used to
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// create channel. Otherwise, connect to server and override hostname if
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// override_hostname is provided.
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// When cred_type is not 'ssl', override_hostname is ignored.
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// Set use_prod_root to true to use the SSL root for connecting to google.
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// In this case, path to the roots pem file must be set via environment variable
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// GRPC_DEFAULT_SSL_ROOTS_FILE_PATH.
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// Otherwise, root for test SSL cert will be used.
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// creds will be used to create a channel when cred_type is 'ssl'.
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// Use examples:
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// CreateTestChannel(
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// "1.1.1.1:12345", "ssl", "override.hostname.com", false, creds);
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// CreateTestChannel("test.google.com:443", "ssl", "", true, creds);
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// same as above
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// CreateTestChannel("", "ssl", "test.google.com:443", true, creds);
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std::shared_ptr<Channel> CreateTestChannel(
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const std::string& server, const std::string& cred_type,
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const std::string& override_hostname, bool use_prod_roots,
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const std::shared_ptr<CallCredentials>& creds,
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const ChannelArguments& args) {
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return CreateTestChannel(server, cred_type, override_hostname, use_prod_roots,
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creds, args,
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/*interceptor_creators=*/{});
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}
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std::shared_ptr<Channel> CreateTestChannel(
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const std::string& server, const std::string& override_hostname,
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testing::transport_security security_type, bool use_prod_roots,
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const std::shared_ptr<CallCredentials>& creds,
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const ChannelArguments& args) {
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return CreateTestChannel(server, override_hostname, security_type,
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use_prod_roots, creds, args,
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/*interceptor_creators=*/{});
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}
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std::shared_ptr<Channel> CreateTestChannel(
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const std::string& server, const std::string& override_hostname,
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testing::transport_security security_type, bool use_prod_roots,
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const std::shared_ptr<CallCredentials>& creds) {
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return CreateTestChannel(server, override_hostname, security_type,
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use_prod_roots, creds, ChannelArguments());
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}
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std::shared_ptr<Channel> CreateTestChannel(
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const std::string& server, const std::string& override_hostname,
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testing::transport_security security_type, bool use_prod_roots) {
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return CreateTestChannel(server, override_hostname, security_type,
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use_prod_roots, std::shared_ptr<CallCredentials>());
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}
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// Shortcut for end2end and interop tests.
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std::shared_ptr<Channel> CreateTestChannel(
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const std::string& server, testing::transport_security security_type) {
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return CreateTestChannel(server, "foo.test.google.fr", security_type, false);
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}
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std::shared_ptr<Channel> CreateTestChannel(
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const std::string& server, const std::string& credential_type,
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const std::shared_ptr<CallCredentials>& creds) {
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ChannelArguments channel_args;
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MaybeSetCustomChannelArgs(&channel_args);
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std::shared_ptr<ChannelCredentials> channel_creds =
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testing::GetCredentialsProvider()->GetChannelCredentials(credential_type,
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&channel_args);
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GPR_ASSERT(channel_creds != nullptr);
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if (creds.get()) {
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channel_creds = grpc::CompositeChannelCredentials(channel_creds, creds);
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}
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return grpc::CreateCustomChannel(server, channel_creds, channel_args);
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}
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std::shared_ptr<Channel> CreateTestChannel(
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const std::string& server, const std::string& cred_type,
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const std::string& override_hostname, bool use_prod_roots,
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const std::shared_ptr<CallCredentials>& creds, const ChannelArguments& args,
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std::vector<
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std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>
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interceptor_creators) {
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ChannelArguments channel_args(args);
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MaybeSetCustomChannelArgs(&channel_args);
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std::shared_ptr<ChannelCredentials> channel_creds;
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if (cred_type.empty()) {
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if (interceptor_creators.empty()) {
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return grpc::CreateCustomChannel(server, InsecureChannelCredentials(),
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channel_args);
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} else {
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return experimental::CreateCustomChannelWithInterceptors(
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server, InsecureChannelCredentials(), channel_args,
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std::move(interceptor_creators));
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}
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} else if (cred_type == testing::kTlsCredentialsType) { // cred_type == "ssl"
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if (use_prod_roots) {
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gpr_once_init(&g_once_init_add_prod_ssl_provider, &AddProdSslType);
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channel_creds = testing::GetCredentialsProvider()->GetChannelCredentials(
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kProdTlsCredentialsType, &channel_args);
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if (!server.empty() && !override_hostname.empty()) {
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channel_args.SetSslTargetNameOverride(override_hostname);
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}
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} else {
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// override_hostname is discarded as the provider handles it.
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channel_creds = testing::GetCredentialsProvider()->GetChannelCredentials(
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testing::kTlsCredentialsType, &channel_args);
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}
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GPR_ASSERT(channel_creds != nullptr);
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const std::string& connect_to = server.empty() ? override_hostname : server;
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if (creds.get()) {
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channel_creds = grpc::CompositeChannelCredentials(channel_creds, creds);
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}
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if (interceptor_creators.empty()) {
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return grpc::CreateCustomChannel(connect_to, channel_creds, channel_args);
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} else {
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return experimental::CreateCustomChannelWithInterceptors(
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connect_to, channel_creds, channel_args,
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std::move(interceptor_creators));
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}
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} else {
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channel_creds = testing::GetCredentialsProvider()->GetChannelCredentials(
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cred_type, &channel_args);
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GPR_ASSERT(channel_creds != nullptr);
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if (interceptor_creators.empty()) {
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return grpc::CreateCustomChannel(server, channel_creds, channel_args);
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} else {
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return experimental::CreateCustomChannelWithInterceptors(
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server, channel_creds, channel_args, std::move(interceptor_creators));
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}
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}
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}
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std::shared_ptr<Channel> CreateTestChannel(
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const std::string& server, const std::string& override_hostname,
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testing::transport_security security_type, bool use_prod_roots,
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const std::shared_ptr<CallCredentials>& creds, const ChannelArguments& args,
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std::vector<
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std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>
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interceptor_creators) {
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std::string credential_type =
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security_type == testing::ALTS
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? testing::kAltsCredentialsType
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: (security_type == testing::TLS ? testing::kTlsCredentialsType
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: testing::kInsecureCredentialsType);
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return CreateTestChannel(server, credential_type, override_hostname,
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use_prod_roots, creds, args,
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std::move(interceptor_creators));
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}
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std::shared_ptr<Channel> CreateTestChannel(
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const std::string& server, const std::string& override_hostname,
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testing::transport_security security_type, bool use_prod_roots,
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const std::shared_ptr<CallCredentials>& creds,
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std::vector<
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std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>
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interceptor_creators) {
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return CreateTestChannel(server, override_hostname, security_type,
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use_prod_roots, creds, ChannelArguments(),
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std::move(interceptor_creators));
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}
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std::shared_ptr<Channel> CreateTestChannel(
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const std::string& server, const std::string& credential_type,
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const std::shared_ptr<CallCredentials>& creds,
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std::vector<
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std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>
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interceptor_creators) {
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ChannelArguments channel_args;
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MaybeSetCustomChannelArgs(&channel_args);
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std::shared_ptr<ChannelCredentials> channel_creds =
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testing::GetCredentialsProvider()->GetChannelCredentials(credential_type,
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&channel_args);
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GPR_ASSERT(channel_creds != nullptr);
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if (creds.get()) {
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channel_creds = grpc::CompositeChannelCredentials(channel_creds, creds);
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}
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return experimental::CreateCustomChannelWithInterceptors(
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server, channel_creds, channel_args, std::move(interceptor_creators));
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}
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} // namespace grpc
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