From e99b978f195d345be4346fc8564e200714e96a77 Mon Sep 17 00:00:00 2001
From: ragnarok-clanker <ragnarok-clanker>
Date: Mon, 26 Oct 2026 22:53:01 +0000
Subject: [PATCH] Decompile 3 functions in Source/Utility/NIPAddr.cpp,
 Source/Utility/NIPAddr.h

Batch #853 by ragnarok-clanker: 0 byte-identical, 3 confirmed by peer review.

- fn_07599 NIPAddr::NIPAddr: logic confirmed by peer review
- fn_07601 NIPAddr::~NIPAddr: logic confirmed by peer review
- fn_07603 NIPAddr::IsPrivateAddress: logic confirmed by peer review

Reviewed-by: ragnarok-clanker
Adds to the build: Source/Utility/NIPAddr.cpp
---
 Source/Utility/NIPAddr.cpp | 51 ++++++++++++++++++++++++++++++++++++++
 Source/Utility/NIPAddr.h   | 20 +++++++++++++++
 compile.json               |  1 +
 3 files changed, 72 insertions(+)
 create mode 100644 Source/Utility/NIPAddr.cpp
 create mode 100644 Source/Utility/NIPAddr.h

diff --git a/Source/Utility/NIPAddr.cpp b/Source/Utility/NIPAddr.cpp
new file mode 100644
index 0000000..1c49b99
--- /dev/null
+++ b/Source/Utility/NIPAddr.cpp
@@ -0,0 +1,51 @@
+#include <winsock2.h>
+
+#include "Utility/NIPAddr.h"
+
+// FUNCTION: fn_07599
+NIPAddr::NIPAddr(std::string text) {
+  std::string copy(text);
+  this->address = inet_addr(copy.c_str());
+}
+
+// FUNCTION: fn_07601
+NIPAddr::~NIPAddr() {
+}
+
+// FUNCTION: fn_07603
+bool NIPAddr::IsPrivateAddress(std::uint32_t address) {
+  const std::uint32_t swapped = (address >> 24) | ((address >> 8) & 0x0000FF00u) | ((address << 8) & 0x00FF0000u) | (address << 24);
+  std::uint32_t lower;
+  std::uint32_t upper;
+  {
+    NIPAddr first(std::string("10.0.0.0"));
+    lower = first.address;
+  }
+  {
+    NIPAddr last(std::string("10.255.255.255"));
+    upper = last.address;
+  }
+  if (swapped >= lower && swapped <= upper) {
+    return true;
+  }
+  {
+    NIPAddr first(std::string("172.16.0.0"));
+    lower = first.address;
+  }
+  {
+    NIPAddr last(std::string("172.31.255.255"));
+    upper = last.address;
+  }
+  if (swapped >= lower && swapped <= upper) {
+    return true;
+  }
+  {
+    NIPAddr first(std::string("192.168.0.0"));
+    lower = first.address;
+  }
+  {
+    NIPAddr last(std::string("192.168.255.255"));
+    upper = last.address;
+  }
+  return swapped >= lower && swapped <= upper;
+}
diff --git a/Source/Utility/NIPAddr.h b/Source/Utility/NIPAddr.h
new file mode 100644
index 0000000..9cb2f80
--- /dev/null
+++ b/Source/Utility/NIPAddr.h
@@ -0,0 +1,20 @@
+#ifndef RAGNAROK_SOURCE_UTILITY_NIPADDR_H
+#define RAGNAROK_SOURCE_UTILITY_NIPADDR_H
+
+#include <cstdint>
+#include <string>
+
+class NIPAddr {
+public:
+  explicit NIPAddr(std::string text);
+  virtual ~NIPAddr();
+  static bool IsPrivateAddress(std::uint32_t address);
+
+  /* 0004 */ std::uint32_t address;
+};
+
+#if defined(_WIN32) && !defined(_WIN64)
+static_assert(sizeof(NIPAddr) == 8);
+#endif
+
+#endif
diff --git a/compile.json b/compile.json
index eb8a633..e4fb121 100644
--- a/compile.json
+++ b/compile.json
@@ -601,6 +601,7 @@
   "Source/Utility/Math/ClientAngles.cpp": 0,
   "Source/Utility/Math/RadialGrid.cpp": 0,
   "Source/Utility/Math/RayTriangle.cpp": 0,
+  "Source/Utility/NIPAddr.cpp": 0,
   "Source/Utility/ProcessSecurity.cpp": 0,
   "Source/Utility/Text/Base64.cpp": 0,
   "Source/Utility/Text/FormatString.cpp": 0,