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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>
#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 */
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