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