| /* |
| * |
| * Copyright 2018 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 <grpc/support/port_platform.h> |
| |
| #ifdef GPR_LINUX |
| |
| #include "src/core/lib/security/credentials/alts/check_gcp_environment.h" |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/sync.h> |
| |
| #include <string.h> |
| |
| #define GRPC_ALTS_EXPECT_NAME_GOOGLE "Google" |
| #define GRPC_ALTS_EXPECT_NAME_GCE "Google Compute Engine" |
| #define GRPC_ALTS_PRODUCT_NAME_FILE "/sys/class/dmi/id/product_name" |
| |
| static bool g_compute_engine_detection_done = false; |
| static bool g_is_on_compute_engine = false; |
| static gpr_mu g_mu; |
| static gpr_once g_once = GPR_ONCE_INIT; |
| |
| namespace grpc_core { |
| namespace internal { |
| |
| bool check_bios_data(const char* bios_data_file) { |
| char* bios_data = read_bios_file(bios_data_file); |
| bool result = |
| bios_data && ((!strcmp(bios_data, GRPC_ALTS_EXPECT_NAME_GOOGLE)) || |
| (!strcmp(bios_data, GRPC_ALTS_EXPECT_NAME_GCE))); |
| gpr_free(bios_data); |
| return result; |
| } |
| |
| } // namespace internal |
| } // namespace grpc_core |
| |
| static void init_mu(void) { gpr_mu_init(&g_mu); } |
| |
| bool grpc_alts_is_running_on_gcp() { |
| gpr_once_init(&g_once, init_mu); |
| gpr_mu_lock(&g_mu); |
| if (!g_compute_engine_detection_done) { |
| g_is_on_compute_engine = |
| grpc_core::internal::check_bios_data(GRPC_ALTS_PRODUCT_NAME_FILE); |
| g_compute_engine_detection_done = true; |
| } |
| gpr_mu_unlock(&g_mu); |
| return g_is_on_compute_engine; |
| } |
| |
| #endif // GPR_LINUX |