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Contents
// 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/impl/codegen/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>
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));
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
Version data entries
18 entries across 18 versions & 2 rubygems