/* *	DDNS v3 Client * *		Author:		Alan Yates <alany@ay.com.au> *		Win32 Port:	Kieron Briggs <kieron@kieron.nu> *		Version:	$Id: ddns3.c,v 1.2 2003/03/20 05:21:59 alany Exp $ */#include <stdio.h>#ifdef WIN32#include <windows.h>#define strcasecmp(x,y) stricmp((x),(y))else#include <unistd.h>#endif#include <string.h>#include <stdlib.h>#include "ctx.h"#define	ERR_USAGE	-1#define	ERR_ARGUMENTS	-2#define	ERR_CONNECTION	-3#define	ERR_AUTH	-4#define ERR_CLOSING	-5#define ERR_LOGIC	-6struct client_vars {	char *host;	char *port;	char *auth;	char *user;	char *pass;	int debug;} CV;static voidhelp(void) {	fprintf(stderr, "\n");	fprintf(stderr, "DDNS Client v3 (c) :: http://www.ddns.nu/\n");	fprintf(stderr, "(c) 1999-2002 Alan Yates <alany@ay.com.au>\n");	fprintf(stderr, "$Id: ddns3.c,v 1.2 2003/03/20 05:21:59 alany Exp $\n");	fprintf(stderr, "\n");	fprintf(stderr, "Usage: ddns3 <required args> [optional args] <action list>\n");	fprintf(stderr, "\n");	fprintf(stderr, "Required args\n");	fprintf(stderr, "	--user	username\n");	fprintf(stderr, "	--pass	password\n");	fprintf(stderr, "Optional args\n");	fprintf(stderr, "	--host	server-hostname		specify server host\n");	fprintf(stderr, "	--port	server-tcp-port		specify server port\n");	fprintf(stderr, "	--debug				activate debug mode\n");	fprintf(stderr, "	--auth	auth-name		specify authentication type\n");	fprintf(stderr, "Authentication types:\n");#ifdef WIN32	fprintf(stderr, "	plaintext, md5, ddns (default), strong\n");#else	fprintf(stderr, "	plaintext, crypt, md5, ddns (default), strong\n");#endif	fprintf(stderr, "Actions:\n");	fprintf(stderr, "	list				lists IP-Handles\n");	fprintf(stderr, "	set <handle> <ip>		sets an IP-Handle's value\n");	fprintf(stderr, "	guess <handle> <source>		sets an IP-Handle's value\n");	fprintf(stderr, "					guessing the IP from the <source>\n");	fprintf(stderr, "					end of the connection, ends are\n");	fprintf(stderr, "					named 'remote' or 'local'\n");	fprintf(stderr, "\n");}static intparse_args(int argc, char **argv, char **env) {	int i;	if(argc == 1) {		help();		exit(ERR_USAGE);	}	for(i = 1; i < argc; i++) {		if(!strcmp("--user", argv[i]) && i+1 < argc) {			CV.user = argv[++i];		} else if(!strcmp("--pass", argv[i]) && i+1 < argc) {			CV.pass = argv[++i];		} else if(!strcmp("--host", argv[i]) && i+1 < argc) {			CV.host = argv[++i];		} else if(!strcmp("--port", argv[i]) && i+1 < argc) {			CV.port = argv[++i];		} else if(!strcmp("--auth", argv[i]) && i+1 < argc) {			CV.auth = argv[++i];		} else if(!strcmp("--debug", argv[i])) {			CV.debug = -1;		}		else if(!strcmp("list", argv[i])) break;		else if(!strcmp("set", argv[i])) break;		else if(!strcmp("guess", argv[i])) break;		else {			fprintf(stderr, "unknown or malformed argument: %s\n", argv[i]);			exit(ERR_ARGUMENTS);		}	}	return i;}static voiddefaults(void) {	CV.host = "ns.ddns.nu";	CV.port = "5000";	CV.auth = "ddns";	CV.debug = 0;}static voidcheck_args(void) {	int err = 0;	if(!CV.user) {		fprintf(stderr, "client_error: you must specify a username\n");		err ++;	}	if(!CV.pass) {		fprintf(stderr, "client_error: you must specify a password\n");		err ++;	}	if(err > 0) {		fprintf(stderr, "client_exit: argument parsing; %d errors\n", err);		exit(ERR_ARGUMENTS);	}}static intactions(struct ddns3_ctx *c, int argc, char **argv, int start) {	int i, err = 0;	for(i = start; i < argc; i++) {		if(!strcmp("list", argv[i])) {			if(ddns3_ctx_list(c) < 0) {				fprintf(stderr, "server_message: %s", c->buf);				fprintf(stderr, "client_error: could not get handle list\n");				err++;			} else {				int j;				for(j = 0; c->list[j]; j += 2) {					printf("%-20s %s\n", c->list[j], c->list[j+1]);				}			}		} else if(!strcmp("set", argv[i]) && i+2 < argc) {			if(ddns3_ctx_set(c, argv[i+1], argv[i+2]) < 0) {				fprintf(stderr, "server_message: %s", c->buf);				fprintf(stderr, "client_error: could not set handle %s to ip %s, closing\n", argv[i+1], argv[i+2]);				err++;			} else printf("server_message: %s", c->buf);						i += 2;		} else if(!strcmp("guess", argv[i]) && i+2 < argc) {			int type = -1;			if(!strcasecmp("remote", argv[i+2])) type = GUESS_REMOTE;			else if(!strcasecmp("local", argv[i+2])) type = GUESS_LOCAL;			else {				fprintf(stderr, "client_error: invalid guess type: %s\n", argv[i+2]);				return ERR_ARGUMENTS;			}			if(ddns3_ctx_guess(c, argv[i+1], type) < 0) {				fprintf(stderr, "server_message: %s", c->buf);				fprintf(stderr, "client_error: could not set handle %s by guessing IP, closing\n", argv[i+1]);				err++;			} else printf("server_message: %s", c->buf);			i += 2;		} else {			fprintf(stderr, "unknown or mangled action: %s\n", argv[i]);			return ERR_ARGUMENTS;		}	}		return err;}intmain(int argc, char **argv, char **env) {	int start, ret;	struct ddns3_ctx *c;	/* arguments and ugly stuff */	memset(&CV, 0, sizeof(struct client_vars));	defaults();	start = parse_args(argc, argv, env);	check_args();	/* now the long and ugly stuff */	/* connect and login to DDNS server */	if(ddns3_ctx_new(&c, CV.host, atoi(CV.port)) < 0) {		fprintf(stderr, "client_error: creating ddns3_ctx, exiting\n");		exit(ERR_LOGIC);	}	if(ddns3_ctx_connect(c) < 0) {		fprintf(stderr, "server_message: %s", c->buf);		fprintf(stderr, "client_error: could not connect to %s:%d, exiting\n", CV.host, atoi(CV.port));		exit(ERR_CONNECTION);	}	if(ddns3_ctx_login(c, CV.auth, CV.user, CV.pass) < 0) {		fprintf(stderr, "server_message: %s", c->buf);		fprintf(stderr, "client_error: could not authenticate\n");		exit(ERR_AUTH);	}	/* do what we have to */	ret = actions(c, argc, argv, start);	/* close connection nicely */	if(ddns3_ctx_logout(c) < 0) {		fprintf(stderr, "server_message: %s", c->buf);		fprintf(stderr, "client_error: could not logout, giving up clean goodbye, exiting\n");		exit(ERR_CLOSING);	}	if(ddns3_ctx_disconnect(c) < 0) {		fprintf(stderr, "server_message: %s", c->buf);		fprintf(stderr, "client_error: disconnect failed, giving up\n");		exit(ERR_CLOSING);	}	if(ddns3_ctx_del(&c) < 0) {		fprintf(stderr, "client_error: could not delete ddns3_ctx, oh well\n");		exit(ERR_LOGIC);	}		return ret;}