/*
  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);
}