Merge pull request #19 from p0358/main

Big refactor of launching process

1 files changed, 71 insertions, 0 deletions

diff --git a/loader_wsock32_proxy/hookutils.cpp b/loader_wsock32_proxy/hookutils.cpp
new file mode 100644
index 00000000..8603cb35
--- /dev/null
+++ b/loader_wsock32_proxy/hookutils.cpp
@@ -0,0 +1,71 @@
+#include "pch.h"
+#include "../NorthstarDedicatedTest/hookutils.h"
+
+#define ERROR(...) { char err[2048]; sprintf_s(err, __VA_ARGS__); MessageBoxA(GetForegroundWindow(), err, "Northstar Wsock32 Proxy Error", 0); }
+
+TempReadWrite::TempReadWrite(void* ptr)
+{
+    m_ptr = ptr;
+    MEMORY_BASIC_INFORMATION mbi;
+    VirtualQuery(m_ptr, &mbi, sizeof(mbi));
+    VirtualProtect(mbi.BaseAddress, mbi.RegionSize, PAGE_EXECUTE_READWRITE, &mbi.Protect);
+    m_origProtection = mbi.Protect;
+}
+
+TempReadWrite::~TempReadWrite()
+{
+    MEMORY_BASIC_INFORMATION mbi;
+    VirtualQuery(m_ptr, &mbi, sizeof(mbi));
+    VirtualProtect(mbi.BaseAddress, mbi.RegionSize, m_origProtection, &mbi.Protect);
+}
+
+
+void HookEnabler::CreateHook(LPVOID ppTarget, LPVOID ppDetour, LPVOID* ppOriginal, const char* targetName)
+{
+    // the macro for this uses ppTarget's name as targetName, and this typically starts with &
+    // targetname is used for debug stuff and debug output is nicer if we don't have this
+    if (*targetName == '&')
+        targetName++;
+
+    if (MH_CreateHook(ppTarget, ppDetour, ppOriginal) == MH_OK)
+    {
+        HookTarget* target = new HookTarget;
+        target->targetAddress = ppTarget;
+        target->targetName = (char*)targetName;
+
+        m_hookTargets.push_back(target);
+    }
+    else
+    {
+        if (targetName != nullptr)
+        {
+            ERROR("MH_CreateHook failed for function %s", targetName);
+        }
+        else
+        {
+            ERROR("MH_CreateHook failed for unknown function");
+        }
+    }
+}
+
+HookEnabler::~HookEnabler()
+{
+    for (auto& hook : m_hookTargets)
+    {
+        if (MH_EnableHook(hook->targetAddress) != MH_OK)
+        {
+            if (hook->targetName != nullptr)
+            {
+                ERROR("MH_EnableHook failed for function %s", hook->targetName);
+            }
+            else
+            {
+                ERROR("MH_EnableHook failed for unknown function");
+            }
+        }
+        else
+        {
+            //ERROR("Enabling hook %s", hook->targetName);
+        }
+    }
+}
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