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// Copyright 2010 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_ADDRESS_FAMILY_H_
#define NET_BASE_ADDRESS_FAMILY_H_
#include "net/base/net_export.h"
namespace net {
class IPAddress;
// Enum wrapper around the address family types supported by host resolver
// procedures.
enum AddressFamily {
ADDRESS_FAMILY_UNSPECIFIED, // AF_UNSPEC
ADDRESS_FAMILY_IPV4, // AF_INET
ADDRESS_FAMILY_IPV6, // AF_INET6
ADDRESS_FAMILY_LAST = ADDRESS_FAMILY_IPV6
};
// HostResolverFlags is a bitflag enum used by host resolver procedures to
// determine the value of addrinfo.ai_flags and work around getaddrinfo
// peculiarities.
enum {
HOST_RESOLVER_CANONNAME = 1 << 0, // AI_CANONNAME
// Hint to the resolver proc that only loopback addresses are configured.
HOST_RESOLVER_LOOPBACK_ONLY = 1 << 1,
// Indicate the address family was set because no IPv6 support was detected.
HOST_RESOLVER_DEFAULT_FAMILY_SET_DUE_TO_NO_IPV6 = 1 << 2,
// The resolver should avoid resolving using multicast protocols (LLMNR or
// mDNS).
HOST_RESOLVER_AVOID_MULTICAST = 1 << 3
};
typedef int HostResolverFlags;
// Returns AddressFamily for |address|.
NET_EXPORT AddressFamily GetAddressFamily(const IPAddress& address);
// Maps the given AddressFamily to either AF_INET, AF_INET6 or AF_UNSPEC.
NET_EXPORT int ConvertAddressFamily(AddressFamily address_family);
// Maps AF_INET, AF_INET6 or AF_UNSPEC to an AddressFamily. Any other AF_ value
// (or any other value) passed in results in NOTREACHED().
NET_EXPORT AddressFamily ToAddressFamily(int family);
} // namespace net
#endif // NET_BASE_ADDRESS_FAMILY_H_
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