| /* |
| * |
| * 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> |
| |
| #include "src/core/lib/iomgr/port.h" |
| |
| #include <grpc/impl/codegen/log.h> |
| #include "src/core/lib/iomgr/internal_errqueue.h" |
| |
| #ifdef GRPC_POSIX_SOCKET_TCP |
| |
| #include <errno.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/utsname.h> |
| |
| namespace grpc_core { |
| static bool errqueue_supported = false; |
| |
| bool kernel_supports_errqueue() { return errqueue_supported; } |
| |
| void grpc_errqueue_init() { |
| /* Both-compile time and run-time linux kernel versions should be atleast 4.0.0 |
| */ |
| #ifdef LINUX_VERSION_CODE |
| #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 0, 0) |
| struct utsname buffer; |
| if (uname(&buffer) != 0) { |
| gpr_log(GPR_ERROR, "uname: %s", strerror(errno)); |
| return; |
| } |
| char* release = buffer.release; |
| if (release == nullptr) { |
| return; |
| } |
| |
| if (strtol(release, nullptr, 10) >= 4) { |
| errqueue_supported = true; |
| } else { |
| gpr_log(GPR_DEBUG, "ERRQUEUE support not enabled"); |
| } |
| #endif /* LINUX_VERSION_CODE <= KERNEL_VERSION(4, 0, 0) */ |
| #endif /* LINUX_VERSION_CODE */ |
| } |
| } /* namespace grpc_core */ |
| |
| #else |
| |
| namespace grpc_core { |
| void grpc_errqueue_init() {} |
| } /* namespace grpc_core */ |
| |
| #endif /* GRPC_POSIX_SOCKET_TCP */ |