/*
  v6scan.c
  by phased
  phased@snosoft.com

  ipv6 port scanner
  06/02

  "there be some deepmagic going on"

*/

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>    /* sockaddr_in6 structure */
#include <netdb.h>         /* gethostbyname2 */

#define VERSION "1.0"

int ports[] = { 
  21,
  22,
  23,
  25,
  79,
  80,
  110,
  113,
  139,
  143,
  515,
  1433,
  5000,
  6000};

/* add more */

int main(int argc, char *argv[]) {
  int delay, port, i;

  printf ("v6scan version %s\n", VERSION);

  if (argc < 3) {
    usage(argv[0]);
  }

  delay = atoi(argv[2]);
  printf(" scanning %s\n", argv[1]);
  printf(" using %i second delay\n", delay);
  printf(" checking %d ports\n", sizeof(ports)/sizeof(ports[0]));

  for(i=0;i<sizeof(ports)/sizeof(ports[0]);i++) {
    checkhost(argv[1], i, delay);
    sleep(delay);
  }
}

checkhost(char *host, int port) {
  int sock;
  struct sockaddr_in6 target;
  struct hostent *hostname;

  if (( sock = socket(AF_INET6, SOCK_STREAM, 0)) < 0 ) {
    printf("error creating socket ipv6 may not be supported\n");
    exit(0);
  }

  memset((char *)&target, 0, sizeof(target));
  if ((hostname = gethostbyname2(host, AF_INET6)) == NULL) {
    printf("error gethostbyname2\n");
    exit(0);
  }

  target.sin6_port = htons(port);
  target.sin6_family = AF_INET6;
  memcpy((char *)&target.sin6_addr, hostname->h_addr, hostname->h_length);

  if ((connect(sock,(struct sockaddr *)&target,
  sizeof(struct sockaddr_in6))) < 0) {
    close(sock);
    return(0);
  }
  else {
    printf (" connected to port %d\n", ports[port]);
  }
  close(sock);
}

int usage(char *progname) {
  printf("%s <host> <delay>\n", progname);
  exit(0);
}