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#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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