From edc56b1c98beac5f19a273695f66b8bc58722938 Mon Sep 17 00:00:00 2001
From: manuel <manuel@mausz.at>
Date: Sat, 9 Mar 2013 15:28:20 +0100
Subject: add signature scanner

---
 sigscan.h | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 sigscan.h

(limited to 'sigscan.h')

diff --git a/sigscan.h b/sigscan.h
new file mode 100644
index 0000000..f6727a9
--- /dev/null
+++ b/sigscan.h
@@ -0,0 +1,64 @@
+#ifndef SIGSCAN_H
+#define SIGSCAN_H
+
+#include <stdio.h>
+
+#ifdef _WIN32
+	#define WIN32_LEAN_AND_MEAN
+	#include <windows.h>
+#else
+	#include <dlfcn.h>
+	#include <sys/types.h>
+	#include <sys/stat.h> 
+#endif
+
+class CSigScan {
+private:
+    /* Private Variables */
+    /* Base Address of the server module in memory */
+    static unsigned char *base_addr;
+    /* The length to the module's ending address */
+    static size_t base_len;
+ 
+    /* The signature to scan for */
+    unsigned char *sig_str;
+    /* A mask to ignore certain bytes in the signature such as addresses
+       The mask should be as long as all the bytes in the signature string
+       Use '?' to ignore a byte and 'x' to check it
+       Example: "xxx????xx" - The first 3 bytes are checked, then the next 4 are
+       ignored, then the last 2 are checked */
+    char *sig_mask;
+    /* The length of sig_str and sig_mask (not including a terminating null for sig_mask) */
+    size_t sig_len;
+ 
+    /* Private Functions */
+    void* FindSignature(void);
+ 
+public:
+    /* Public Variables */
+ 
+    /* sigscan_dllfunc is a pointer of something that resides inside the gamedll so we can get
+       the base address of it. From a SourceMM plugin, just set this to ismm->serverFactory(0)
+       in Load(). From a Valve Server Plugin, you must set this to an actual factory returned
+       from gameServerFactory and hope that a SourceMM plugin did not override it. */
+    static void *(*sigscan_dllfunc)(const char *pName, int *pReturnCode);
+ 
+    /* If the scan was successful or not */
+    char is_set;
+    /* Starting address of the found function */
+    void *sig_addr;
+ 
+    CSigScan(void): sig_str(NULL), sig_mask(NULL), sig_len(0), sig_addr(NULL) {}
+	~CSigScan(void);
+
+    static bool GetDllMemInfo(void);
+    int Init(const unsigned char *sig, const char *mask, size_t len);
+};
+ 
+/* Sigscanned member functions are casted to member function pointers of this class
+   and called with member function pointer syntax */
+class EmptyClass { };
+ 
+void InitSigs(void);
+ 
+#endif
-- 
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