#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <netdb.h>

/*
oport6.c is provided by 0x4D722E20446F6E
This code is ripped and modified from Joonbok Lee
Presentation about IPv6 Socket Programming
*/

int main(int argc, char *argv[]){
 int s, c, retval, addrlen;
 struct addrinfo Hints, *AddrInfo, *AI;

 if(argc!=3){
   printf("Usage : %s <IPv6 address> <Port>\n", argv[0]);
   exit(0);
 }
 memset(&Hints,0,sizeof(Hints));
 Hints.ai_family = AF_UNSPEC;
 Hints.ai_socktype = SOCK_STREAM;

 retval = getaddrinfo(argv[1],argv[2], &Hints, &AddrInfo);
 if(retval!=0){
  printf("Cannot resolve requested address\n");
  exit(0);
 }

 for(AI=AddrInfo;AI!=NULL;AI=AI->ai_next){
  if(AI->ai_family==AF_INET6){
   if((s=socket(AI->ai_family,AI->ai_socktype,AI->ai_protocol))<0){
    printf("can't create socket\n");
    exit(0);
   }
   c=connect(s,AI->ai_addr,AI->ai_addrlen);
   if(c==0){
    printf("[OPEN] %s on %s\n",argv[1],argv[2]);
   }else{
    printf("[CLOSE/FIREWALL] %s on %s\n",argv[1],argv[2]);
   }
  }else{
    printf("%s is not IPv6 family\n",argv[1]);
  }
  freeaddrinfo(AddrInfo);
 }
}