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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.
*
*/
/* This file contains constants defined in <linux/errqueue.h> and
* <linux/net_tstamp.h> so as to allow collecting network timestamps in the
* kernel. This file allows tcp_posix.cc to compile on platforms that do not
* have <linux/errqueue.h> and <linux/net_tstamp.h>.
*/
#ifndef GRPC_CORE_LIB_IOMGR_INTERNAL_ERRQUEUE_H
#define GRPC_CORE_LIB_IOMGR_INTERNAL_ERRQUEUE_H
#include <grpc/support/port_platform.h>
#include "src/core/lib/iomgr/port.h"
#ifdef GRPC_POSIX_SOCKET_TCP
#include <sys/types.h>
#include <time.h>
#ifdef GRPC_LINUX_ERRQUEUE
#include <linux/errqueue.h>
#include <linux/net_tstamp.h>
#include <sys/socket.h>
#endif /* GRPC_LINUX_ERRQUEUE */
namespace grpc_core {
#ifdef GRPC_LINUX_ERRQUEUE
/* Redefining scm_timestamping in the same way that <linux/errqueue.h> defines
* it, so that code compiles on systems that don't have it. */
struct scm_timestamping {
struct timespec ts[3];
};
/* Also redefine timestamp types */
/* The timestamp type for when the driver passed skb to NIC, or HW. */
constexpr int SCM_TSTAMP_SND = 0;
/* The timestamp type for when data entered the packet scheduler. */
constexpr int SCM_TSTAMP_SCHED = 1;
/* The timestamp type for when data acknowledged by peer. */
constexpr int SCM_TSTAMP_ACK = 2;
/* Redefine required constants from <linux/net_tstamp.h> */
constexpr uint32_t SOF_TIMESTAMPING_TX_SOFTWARE = 1u << 1;
constexpr uint32_t SOF_TIMESTAMPING_SOFTWARE = 1u << 4;
constexpr uint32_t SOF_TIMESTAMPING_OPT_ID = 1u << 7;
constexpr uint32_t SOF_TIMESTAMPING_TX_SCHED = 1u << 8;
constexpr uint32_t SOF_TIMESTAMPING_TX_ACK = 1u << 9;
constexpr uint32_t SOF_TIMESTAMPING_OPT_TSONLY = 1u << 11;
constexpr uint32_t kTimestampingSocketOptions = SOF_TIMESTAMPING_SOFTWARE |
SOF_TIMESTAMPING_OPT_ID |
SOF_TIMESTAMPING_OPT_TSONLY;
constexpr uint32_t kTimestampingRecordingOptions =
SOF_TIMESTAMPING_TX_SCHED | SOF_TIMESTAMPING_TX_SOFTWARE |
SOF_TIMESTAMPING_TX_ACK;
#endif /* GRPC_LINUX_ERRQUEUE */
/* Returns true if kernel is capable of supporting errqueue and timestamping.
* Currently allowing only linux kernels above 4.0.0
*/
bool kernel_supports_errqueue();
} // namespace grpc_core
#endif /* GRPC_POSIX_SOCKET_TCP */
#endif /* GRPC_CORE_LIB_IOMGR_INTERNAL_ERRQUEUE_H */
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