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| 1 | +/* |
| 2 | + * Copyright (C) 2025 Apple Inc. All rights reserved. |
| 3 | + * |
| 4 | + * Redistribution and use in source and binary forms, with or without |
| 5 | + * modification, are permitted provided that the following conditions |
| 6 | + * are met: |
| 7 | + * 1. Redistributions of source code must retain the above copyright |
| 8 | + * notice, this list of conditions and the following disclaimer. |
| 9 | + * 2. Redistributions in binary form must reproduce the above copyright |
| 10 | + * notice, this list of conditions and the following disclaimer in the |
| 11 | + * documentation and/or other materials provided with the distribution. |
| 12 | + * |
| 13 | + * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| 14 | + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 15 | + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 16 | + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| 17 | + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 18 | + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 19 | + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 20 | + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 21 | + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 22 | + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| 23 | + * THE POSSIBILITY OF SUCH DAMAGE. |
| 24 | + */ |
| 25 | + |
| 26 | +#pragma once |
| 27 | + |
| 28 | +#include <sys/socket.h> |
| 29 | +#include <wtf/Compiler.h> |
| 30 | +#include <wtf/Function.h> |
| 31 | +#include <wtf/TypeCasts.h> |
| 32 | + |
| 33 | +namespace WTF { |
| 34 | + |
| 35 | +inline bool isIPV4SocketAddress(const struct sockaddr& socket) |
| 36 | +{ |
| 37 | + return socket.sa_family == AF_INET; |
| 38 | +} |
| 39 | + |
| 40 | +inline const struct sockaddr_in* dynamicCastToIPV4SocketAddress(const struct sockaddr& socket) |
| 41 | +{ |
| 42 | + if (isIPV4SocketAddress(socket)) |
| 43 | + SUPPRESS_MEMORY_UNSAFE_CAST return reinterpret_cast<const struct sockaddr_in*>(&socket); |
| 44 | + return nullptr; |
| 45 | +} |
| 46 | + |
| 47 | +inline const struct sockaddr_in& asIPV4SocketAddress(const struct sockaddr& socket) |
| 48 | +{ |
| 49 | + RELEASE_ASSERT(isIPV4SocketAddress(socket)); |
| 50 | + SUPPRESS_MEMORY_UNSAFE_CAST return *reinterpret_cast<const struct sockaddr_in*>(&socket); |
| 51 | +} |
| 52 | + |
| 53 | +inline bool initializeIPV4SocketAddress(sockaddr_storage& storage, NOESCAPE const Function<bool(sockaddr_in&)>& initialize) |
| 54 | +{ |
| 55 | + zeroBytes(storage); |
| 56 | + SUPPRESS_MEMORY_UNSAFE_CAST auto& address = *reinterpret_cast<struct sockaddr_in*>(&storage); |
| 57 | + if (!initialize(address)) |
| 58 | + return false; |
| 59 | + storage.ss_family = AF_INET; |
| 60 | + return true; |
| 61 | +} |
| 62 | + |
| 63 | +inline bool isIPV6SocketAddress(const struct sockaddr& socket) |
| 64 | +{ |
| 65 | + return socket.sa_family == AF_INET6; |
| 66 | +} |
| 67 | + |
| 68 | +inline const struct sockaddr_in6* dynamicCastToIPV6SocketAddress(const struct sockaddr& socket) |
| 69 | +{ |
| 70 | + if (isIPV6SocketAddress(socket)) |
| 71 | + SUPPRESS_MEMORY_UNSAFE_CAST return reinterpret_cast<const struct sockaddr_in6*>(&socket); |
| 72 | + return nullptr; |
| 73 | +} |
| 74 | + |
| 75 | +inline const struct sockaddr_in6& asIPV6SocketAddress(const struct sockaddr& socket) |
| 76 | +{ |
| 77 | + RELEASE_ASSERT(isIPV6SocketAddress(socket)); |
| 78 | + SUPPRESS_MEMORY_UNSAFE_CAST return *reinterpret_cast<const struct sockaddr_in6*>(&socket); |
| 79 | +} |
| 80 | + |
| 81 | +inline bool initializeIPV6SocketAddress(sockaddr_storage& storage, NOESCAPE const Function<bool(sockaddr_in6&)>& initialize) |
| 82 | +{ |
| 83 | + zeroBytes(storage); |
| 84 | + SUPPRESS_MEMORY_UNSAFE_CAST auto& address = *reinterpret_cast<struct sockaddr_in6*>(&storage); |
| 85 | + if (!initialize(address)) |
| 86 | + return false; |
| 87 | + storage.ss_family = AF_INET6; |
| 88 | + return true; |
| 89 | +} |
| 90 | + |
| 91 | +inline struct sockaddr& asSocketAddress(sockaddr_storage& storage) |
| 92 | +{ |
| 93 | + SUPPRESS_MEMORY_UNSAFE_CAST return *reinterpret_cast<struct sockaddr*>(&storage); |
| 94 | +} |
| 95 | + |
| 96 | +} // namespace WTF |
| 97 | + |
| 98 | +using WTF::asIPV4SocketAddress; |
| 99 | +using WTF::asIPV6SocketAddress; |
| 100 | +using WTF::asSocketAddress; |
| 101 | +using WTF::dynamicCastToIPV4SocketAddress; |
| 102 | +using WTF::dynamicCastToIPV6SocketAddress; |
| 103 | +using WTF::initializeIPV4SocketAddress; |
| 104 | +using WTF::initializeIPV6SocketAddress; |
| 105 | +using WTF::isIPV4SocketAddress; |
| 106 | +using WTF::isIPV6SocketAddress; |
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