blob: eb89a43df7756e699a74633ff48307b9376b65c5 [file] [log] [blame]
// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "build/build_config.h"
#include "net/base/net_export.h"
#include "net/socket/socket_descriptor.h"
#if defined(OS_ANDROID)
#include <stdint.h>
#include <sys/types.h>
#include <unistd.h>
#endif // OS_ANDROID
namespace net {
// SocketTag represents a tag that can be applied to a socket. Currently only
// implemented for Android, it facilitates assigning a Android TrafficStats tag
// and UID to a socket so that future network data usage by the socket is
// attributed to the tag and UID that the socket is tagged with.
// This class is small (<=64-bits) and contains only POD to facilitate default
// copy and assignment operators so that it can easily be passed by value.
class NET_EXPORT SocketTag {
#if defined(OS_ANDROID)
// Default constructor doesn't set any tags.
SocketTag() : SocketTag(UNSET_UID, UNSET_TAG) {}
// Create a SocketTag with given UID |uid| and |traffic_stats_tag|.
SocketTag(uid_t uid, int32_t traffic_stats_tag)
: uid_(uid), traffic_stats_tag_(traffic_stats_tag) {}
SocketTag() {}
#endif // OS_ANDROID
~SocketTag() {}
bool operator<(const SocketTag& other) const;
bool operator==(const SocketTag& other) const;
bool operator!=(const SocketTag& other) const { return !(*this == other); }
// Apply this tag to |socket|.
void Apply(SocketDescriptor socket) const;
#if defined(OS_ANDROID)
// Values to indicate no UID or tag should be set. These values match those in
// Android:
static const uid_t UNSET_UID = -1;
static const int32_t UNSET_TAG = -1;
// UID to tag with.
uid_t uid_;
// TrafficStats tag to tag with.
int32_t traffic_stats_tag_;
#endif // OS_ANDROID
// Copying and assignment are allowed.
} // namespace net