LibCore: Fix SocketAddress.h compilation errors on Windows

Author: https://github.com/stasoid
Commit: https://github.com/LadybirdBrowser/ladybird/commit/eb650798d05
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2673
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/gmta
Reviewed-by: https://github.com/konradekk

Libraries/LibCore/SocketAddress.h

@@ -9,11 +9,15 @@
 
 #include <AK/IPv4Address.h>
 #include <AK/IPv6Address.h>
-#include <arpa/inet.h>
-#include <netinet/in.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <sys/un.h>
+
+#ifndef AK_OS_WINDOWS
+#    include <arpa/inet.h>
+#    include <netinet/in.h>
+#    include <sys/socket.h>
+#    include <sys/un.h>
+#else
+#    include "SocketAddressWindows.h"
+#endif
 
 namespace Core {
 

Libraries/LibCore/SocketAddressWindows.h

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2025, stasoid <stasoid@yahoo.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+// This header is needed because winsock2.h and windows.h are banned from including from headers and SocketAddress.h needs some struct definitions from those headers.
+// These definitions were copied from Windows SDK headers. Comments, #ifdefs and special annotations like _Field_size_bytes_ were removed. This is fair use, see Oracle v. Google.
+
+#pragma once
+
+typedef unsigned long ULONG;
+typedef unsigned short USHORT;
+typedef char CHAR;
+typedef unsigned char UCHAR;
+typedef USHORT ADDRESS_FAMILY;
+
+#define WINAPI_FAMILY_PARTITION(x) 1
+#define FAR
+#include <inaddr.h>
+#undef WINAPI_FAMILY_PARTITION
+#undef FAR
+
+#include <afunix.h>
+
+#define AF_UNSPEC 0
+#define AF_LOCAL 1 // AF_UNIX
+#define AF_INET 2
+#define AF_INET6 23
+
+struct in6_addr {
+    union {
+        UCHAR Byte[16];
+        USHORT Word[8];
+    } u;
+};
+
+struct SCOPE_ID {
+    union {
+        struct {
+            ULONG Zone : 28;
+            ULONG Level : 4;
+        } u;
+        ULONG Value;
+    } u;
+};
+
+struct sockaddr_in6 {
+    ADDRESS_FAMILY sin6_family;
+    USHORT sin6_port;
+    ULONG sin6_flowinfo;
+    in6_addr sin6_addr;
+    union {
+        ULONG sin6_scope_id;
+        SCOPE_ID sin6_scope_struct;
+    };
+};
+
+struct sockaddr_in {
+    ADDRESS_FAMILY sin_family;
+    USHORT sin_port;
+    IN_ADDR sin_addr;
+    CHAR sin_zero[8];
+};
+
+struct sockaddr {
+    ADDRESS_FAMILY sa_family;
+    CHAR sa_data[14];
+};
+
+struct addrinfo {
+    int ai_flags;
+    int ai_family;
+    int ai_socktype;
+    int ai_protocol;
+    size_t ai_addrlen;
+    char* ai_canonname;
+    sockaddr* ai_addr;
+    addrinfo* ai_next;
+};
+
+extern "C" USHORT __stdcall htons(USHORT hostshort);