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Initial revision

/*************************************************************************
 * (C) 2011 AITNET - Sofia/Bulgaria - <office@aitnet.org>
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
 * $Id: ansh3.c,v 1.1 2011/10/04 22:37:46 misho Exp $
 *
 *************************************************************************/
#include "global.h"
#include "ansh.h"


int Timeout, Verbose, Kill, Crypted = 1;

extern char compiled[], compiledby[], compilehost[];

static void
Usage()
{
	printf(	" -= ansh =- ELWIX Layer3 remote management client over ICMP\n"
		"=== %s === %s@%s ===\n\n"
		" Syntax: ansh [options] <connect2host>\n\n"
		"\t-i <id>\tService ID (default is 42)\n"
		"\t-t <timeout>\tClient session timeout (default is 0 sec)\n"
		"\t-u\t\tSwitch to unencrypted traffic between hosts\n"
		"\t-v\t\tVerbose (more -v, more verbosity ...)\n"
		"\t-h\t\tThis help screen!\n"
		"\n", compiled, compiledby, compilehost);
}

int
main(int argc, char **argv)
{
	struct sockaddr sa = { 0 };
	struct sockaddr_in *sin4 = (struct sockaddr_in*) &sa;
	struct sockaddr_in6 *sin6 = (struct sockaddr_in6*) &sa;
	struct hostent *host;
	char ch;
	int h, len;
	u_short id = ANSH_ID;

	while ((ch = getopt(argc, argv, "hvui:t:")) != -1)
		switch (ch) {
			case 't':
				Timeout = abs(strtol(optarg, NULL, 0));
				break;
			case 'i':
				id = strtol(optarg, NULL, 0);
				break;
			case 'u':
				Crypted ^= Crypted;
				break;
			case 'v':
				Verbose++;
				break;
			case 'h':
			default:
				Usage();
				return 1;
		}
	argc -= optind;
	argv += optind;
	if (!argc) {
		printf("Error:: not specified address for connect ...\n");
		return 1;
	}

	host = gethostbyname(argv[0]);
	if (!host) {
		printf("Error:: in bind address '%s' #%d - %s\n",
				argv[0], h_errno, hstrerror(h_errno));
		return 1;
	}
	switch (host->h_addrtype) {
		case AF_INET:
			sin4->sin_len = sizeof(struct sockaddr_in);
			sin4->sin_family = AF_INET;
			memcpy(&sin4->sin_addr.s_addr, host->h_addr, host->h_length);
			break;
		case AF_INET6:
			sin6->sin6_len = sizeof(struct sockaddr_in6);
			sin6->sin6_family = AF_INET6;
			memcpy(&sin6->sin6_addr.s6_addr, host->h_addr, host->h_length);
			break;
		default:
			printf("Error:: Unknown address type %d !!!\n", host->h_addrtype);
			return 1;
	}

	h = PrepareL3(&sa, &len);
	if (h == -1) {
		printf("Error:: Descriptor not opened ... \n");
		return 1;
	}

	ConnectL3(h, id, &sa, len);

	VERB(1) printf("Finish client.\n");
	close(h);
	return 0;
}