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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_BASE_NETWORK_INTERFACES_GETIFADDRS_H_
#define NET_BASE_NETWORK_INTERFACES_GETIFADDRS_H_
// network_interfaces_getaddrs.cc implements GetNetworkList() using getifaddrs()
// API. It is a non-standard API, so not all POSIX systems implement it (e.g.
// it doesn't exist on Android). It is used on MacOS, iOS and Fuchsia. On Linux
// and Android interface is used to implement GetNetworkList(), see
// network_interfaces_linux.cc.
// This file defines IfaddrsToNetworkInterfaceList() so it can be called in
// unittests.
#include "build/build_config.h"
#include "net/base/net_export.h"
#include "net/base/network_interfaces.h"
#if BUILDFLAG(IS_ANDROID)
#include "base/android/requires_api.h"
#endif // BUILDFLAG(IS_ANDROID)
struct ifaddrs;
namespace net::internal {
class NET_EXPORT_PRIVATE IPAttributesGetter {
public:
IPAttributesGetter() = default;
IPAttributesGetter(const IPAttributesGetter&) = delete;
IPAttributesGetter& operator=(const IPAttributesGetter&) = delete;
virtual ~IPAttributesGetter() = default;
virtual bool IsInitialized() const = 0;
// Returns false if the interface must be skipped. Otherwise sets |attributes|
// and returns true.
virtual bool GetAddressAttributes(const ifaddrs* if_addr,
int* attributes) = 0;
// Returns interface type for the given interface.
virtual NetworkChangeNotifier::ConnectionType GetNetworkInterfaceType(
const ifaddrs* if_addr) = 0;
};
// Converts ifaddrs list returned by getifaddrs() to NetworkInterfaceList. Also
// filters the list interfaces according to |policy| (see
// HostAddressSelectionPolicy).
NET_EXPORT_PRIVATE bool IfaddrsToNetworkInterfaceList(
int policy,
const ifaddrs* interfaces,
IPAttributesGetter* ip_attributes_getter,
NetworkInterfaceList* networks);
#if BUILDFLAG(IS_ANDROID)
#define GETIFADDRS_MIN_API 24
// A version of GetNetworkList() that uses getifaddrs(). Only callable on
// Android N+ where getifaddrs() was available.
// Also, some devices are with buggy getifaddrs(). To work around,
// Use Chromium's own getifaddrs() implementation if
// use_alternative_getifaddrs is true.
REQUIRES_ANDROID_API(GETIFADDRS_MIN_API)
bool GetNetworkListUsingGetifaddrs(NetworkInterfaceList* networks,
int policy,
bool use_alternative_getifaddrs);
#endif
} // namespace net::internal
#endif // NET_BASE_NETWORK_INTERFACES_GETIFADDRS_H_
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