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/*
* 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 -6
struct client_vars {
char *host;
char *port;
char *auth;
char *user;
char *pass;
int debug;
} CV;
static void
help(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 int
parse_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 void
defaults(void) {
CV.host = "ns.ddns.nu";
CV.port = "5000";
CV.auth = "ddns";
CV.debug = 0;
}
static void
check_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 int
actions(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;
}
int
main(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;
}
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