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/*
*
* 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 = (!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
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