cmds.c

Linux下的socks的程序源程序,用于socks的代理服务

 */
mget(argc, argv)
	int argc;
	char **argv;
{
	extern jmp_buf jabort;
	sig_t oldintr;
	int ointer;
	char *cp, *tp, *tp2, tmpbuf[MAXPATHLEN];
	void mabort();

	if (argc < 2 && !another(&argc, &argv, "remote-files")) {
		printf("usage: %s remote-files\n", argv[0]);
		code = -1;
		return;
	}
	mname = argv[0];
	mflag = 1;
	oldintr = signal(SIGINT,mabort);
	(void) setjmp(jabort);
	while ((cp = remglob(argv,proxy)) != NULL) {
		if (*cp == '\0') {
			mflag = 0;
			continue;
		}
		if (mflag && confirm(argv[0], cp)) {
			tp = cp;
			if (mcase) {
				while (*tp && !islower(*tp)) {
					tp++;
				}
				if (!*tp) {
					tp = cp;
					tp2 = tmpbuf;
					while ((*tp2 = *tp) != NULL) {
						if (isupper(*tp2)) {
							*tp2 = 'a' + *tp2 - 'A';
						}
						tp++;
						tp2++;
					}
				}
				tp = tmpbuf;
			}
			if (ntflag) {
				tp = dotrans(tp);
			}
			if (mapflag) {
				tp = domap(tp);
			}
			recvrequest("RETR", tp, cp, "w",
			    tp != cp || !interactive);
			if (!mflag && fromatty) {
				ointer = interactive;
				interactive = 1;
				if (confirm("Continue with","mget")) {
					mflag++;
				}
				interactive = ointer;
			}
		}
	}
	(void) signal(SIGINT,oldintr);
	mflag = 0;
}

char *
remglob(argv,doswitch)
	char *argv[];
	int doswitch;
{
	char temp[16];
	static char buf[MAXPATHLEN];
	static FILE *ftemp = NULL;
	static char **args;
	int oldverbose, oldhash;
	char *cp, *mode;

	if (!mflag) {
		if (!doglob) {
			args = NULL;
		}
		else {
			if (ftemp) {
				(void) fclose(ftemp);
				ftemp = NULL;
			}
		}
		return(NULL);
	}
	if (!doglob) {
		if (args == NULL)
			args = argv;
		if ((cp = *++args) == NULL)
			args = NULL;
		return (cp);
	}
	if (ftemp == NULL) {
		(void) strcpy(temp, _PATH_TMP);
		(void) mktemp(temp);
		oldverbose = verbose, verbose = 0;
		oldhash = hash, hash = 0;
		if (doswitch) {
			pswitch(!proxy);
		}
		for (mode = "w"; *++argv != NULL; mode = "a")
			recvrequest ("NLST", temp, *argv, mode, 0);
		if (doswitch) {
			pswitch(!proxy);
		}
		verbose = oldverbose; hash = oldhash;
		ftemp = fopen(temp, "r");
		(void) unlink(temp);
		if (ftemp == NULL) {
			printf("can't find list of remote files, oops\n");
			return (NULL);
		}
	}
	if (fgets(buf, sizeof (buf), ftemp) == NULL) {
		(void) fclose(ftemp), ftemp = NULL;
		return (NULL);
	}
	if ((cp = index(buf, '\n')) != NULL)
		*cp = '\0';
	return (buf);
}

char *
onoff(bool)
	int bool;
{

	return (bool ? "on" : "off");
}

/*
 * Show status.
 */
/*ARGSUSED*/
status(argc, argv)
	int argc;
	char *argv[];
{
	int i;

	if (connected)
		printf("Connected to %s.\n", hostname);
	else
		printf("Not connected.\n");
	if (!proxy) {
		pswitch(1);
		if (connected) {
			printf("Connected for proxy commands to %s.\n", hostname);
		}
		else {
			printf("No proxy connection.\n");
		}
		pswitch(0);
	}
	printf("Mode: %s; Type: %s; Form: %s; Structure: %s\n",
		modename, typename, formname, structname);
	printf("Verbose: %s; Bell: %s; Prompting: %s; Globbing: %s\n", 
		onoff(verbose), onoff(bell), onoff(interactive),
		onoff(doglob));
	printf("Store unique: %s; Receive unique: %s\n", onoff(sunique),
		onoff(runique));
	printf("Case: %s; CR stripping: %s\n",onoff(mcase),onoff(crflag));
	if (ntflag) {
		printf("Ntrans: (in) %s (out) %s\n", ntin,ntout);
	}
	else {
		printf("Ntrans: off\n");
	}
	if (mapflag) {
		printf("Nmap: (in) %s (out) %s\n", mapin, mapout);
	}
	else {
		printf("Nmap: off\n");
	}
	printf("Hash mark printing: %s; Use of PORT cmds: %s\n",
		onoff(hash), onoff(sendport));
	if (macnum > 0) {
		printf("Macros:\n");
		for (i=0; i<macnum; i++) {
			printf("\t%s\n",macros[i].mac_name);
		}
	}
	code = 0;
}

/*
 * Set beep on cmd completed mode.
 */
/*VARARGS*/
setbell()
{

	bell = !bell;
	printf("Bell mode %s.\n", onoff(bell));
	code = bell;
}

/*
 * Turn on packet tracing.
 */
/*VARARGS*/
settrace()
{

	trace = !trace;
	printf("Packet tracing %s.\n", onoff(trace));
	code = trace;
}

/*
 * Toggle hash mark printing during transfers.
 */
/*VARARGS*/
sethash()
{

	hash = !hash;
	printf("Hash mark printing %s", onoff(hash));
	code = hash;
	if (hash)
		printf(" (%d bytes/hash mark)", 1024);
	printf(".\n");
}

/*
 * Turn on printing of server echo's.
 */
/*VARARGS*/
setverbose()
{

	verbose = !verbose;
	printf("Verbose mode %s.\n", onoff(verbose));
	code = verbose;
}

/*
 * Toggle PORT cmd use before each data connection.
 */
/*VARARGS*/
setport()
{

	sendport = !sendport;
	printf("Use of PORT cmds %s.\n", onoff(sendport));
	code = sendport;
}

/*
 * Turn on interactive prompting
 * during mget, mput, and mdelete.
 */
/*VARARGS*/
setprompt()
{

	interactive = !interactive;
	printf("Interactive mode %s.\n", onoff(interactive));
	code = interactive;
}

/*
 * Toggle metacharacter interpretation
 * on local file names.
 */
/*VARARGS*/
setglob()
{
	
	doglob = !doglob;
	printf("Globbing %s.\n", onoff(doglob));
	code = doglob;
}

/*
 * Set debugging mode on/off and/or
 * set level of debugging.
 */
/*VARARGS*/
setdebug(argc, argv)
	int argc;
	char *argv[];
{
	int val;

	if (argc > 1) {
		val = atoi(argv[1]);
		if (val < 0) {
			printf("%s: bad debugging value.\n", argv[1]);
			code = -1;
			return;
		}
	} else
		val = !debug;
	debug = val;
	if (debug)
		options |= SO_DEBUG;
	else
		options &= ~SO_DEBUG;
	printf("Debugging %s (debug=%d).\n", onoff(debug), debug);
	code = debug > 0;
}

/*
 * Set current working directory
 * on remote machine.
 */
cd(argc, argv)
	int argc;
	char *argv[];
{

	if (argc < 2 && !another(&argc, &argv, "remote-directory")) {
		printf("usage: %s remote-directory\n", argv[0]);
		code = -1;
		return;
	}
	if (command("CWD %s", argv[1]) == ERROR && code == 500) {
		if (verbose)
			printf("CWD command not recognized, trying XCWD\n");
		(void) command("XCWD %s", argv[1]);
	}
}

/*
 * Set current working directory
 * on local machine.
 */
lcd(argc, argv)
	int argc;
	char *argv[];
{
	char buf[MAXPATHLEN];
#ifndef GETCWD
	extern char *getwd();
#endif

	if (argc < 2)
		argc++, argv[1] = home;
	if (argc != 2) {
		printf("usage: %s local-directory\n", argv[0]);
		code = -1;
		return;
	}
	if (!globulize(&argv[1])) {
		code = -1;
		return;
	}
	if (chdir(argv[1]) < 0) {
		fprintf(stderr, "local: %s: %s\n", argv[1], strerror(errno));
		code = -1;
		return;
	}
#ifdef GETCWD
	printf("Local directory now %s\n", getcwd(buf, MAXPATHLEN-1));
#else
	printf("Local directory now %s\n", getwd(buf));
#endif
	code = 0;
}

/*
 * Delete a single file.
 */
delete(argc, argv)
	int argc;
	char *argv[];
{

	if (argc < 2 && !another(&argc, &argv, "remote-file")) {
		printf("usage: %s remote-file\n", argv[0]);
		code = -1;
		return;
	}
	(void) command("DELE %s", argv[1]);
}

/*
 * Delete multiple files.
 */
mdelete(argc, argv)
	int argc;
	char **argv;
{
	extern jmp_buf jabort;
	sig_t oldintr;
	int ointer;
	char *cp;
	void mabort();

	if (argc < 2 && !another(&argc, &argv, "remote-files")) {
		printf("usage: %s remote-files\n", argv[0]);
		code = -1;
		return;
	}
	mname = argv[0];
	mflag = 1;
	oldintr = signal(SIGINT, mabort);
	(void) setjmp(jabort);
	while ((cp = remglob(argv,0)) != NULL) {
		if (*cp == '\0') {
			mflag = 0;
			continue;
		}
		if (mflag && confirm(argv[0], cp)) {
			(void) command("DELE %s", cp);
			if (!mflag && fromatty) {
				ointer = interactive;
				interactive = 1;
				if (confirm("Continue with", "mdelete")) {
					mflag++;
				}
				interactive = ointer;
			}
		}
	}
	(void) signal(SIGINT, oldintr);
	mflag = 0;
}

/*
 * Rename a remote file.
 */
renamefile(argc, argv)
	int argc;
	char *argv[];
{

	if (argc < 2 && !another(&argc, &argv, "from-name"))
		goto usage;
	if (argc < 3 && !another(&argc, &argv, "to-name")) {
usage:
		printf("%s from-name to-name\n", argv[0]);
		code = -1;
		return;
	}
	if (command("RNFR %s", argv[1]) == CONTINUE)
		(void) command("RNTO %s", argv[2]);
}

/*
 * Get a directory listing
 * of remote files.
 */
ls(argc, argv)
	int argc;
	char *argv[];
{
	char *cmd;

	if (argc < 2)
		argc++, argv[1] = NULL;
	if (argc < 3)
		argc++, argv[2] = "-";
	if (argc > 3) {
		printf("usage: %s remote-directory local-file\n", argv[0]);
		code = -1;
		return;
	}
	cmd = argv[0][0] == 'n' ? "NLST" : "LIST";
	if (strcmp(argv[2], "-") && !globulize(&argv[2])) {
		code = -1;
		return;
	}
	if (strcmp(argv[2], "-") && *argv[2] != '|')
		if (!globulize(&argv[2]) || !confirm("output to local-file:", argv[2])) {
			code = -1;
			return;
	}
	recvrequest(cmd, argv[2], argv[1], "w", 0);
}

/*
 * Get a directory listing
 * of multiple remote files.
 */
mls(argc, argv)
	int argc;
	char **argv;
{
	extern jmp_buf jabort;
	sig_t oldintr;
	int ointer, i;
	char *cmd, mode[1], *dest;
	void mabort();

	if (argc < 2 && !another(&argc, &argv, "remote-files"))
		goto usage;
	if (argc < 3 && !another(&argc, &argv, "local-file")) {
usage:
		printf("usage: %s remote-files local-file\n", argv[0]);
		code = -1;
		return;
	}
	dest = argv[argc - 1];
	argv[argc - 1] = NULL;
	if (strcmp(dest, "-") && *dest != '|')
		if (!globulize(&dest) ||
		    !confirm("output to local-file:", dest)) {
			code = -1;
			return;
	}
	cmd = argv[0][1] == 'l' ? "NLST" : "LIST";
	mname = argv[0];
	mflag = 1;
	oldintr = signal(SIGINT, mabort);
	(void) setjmp(jabort);
	for (i = 1; mflag && i < argc-1; ++i) {
		*mode = (i == 1) ? 'w' : 'a';
		recvrequest(cmd, dest, argv[i], mode, 0);
		if (!mflag && fromatty) {
			ointer = interactive;
			interactive = 1;
			if (confirm("Continue with", argv[0])) {
				mflag ++;
			}
			interactive = ointer;
		}
	}
	(void) signal(SIGINT, oldintr);
	mflag = 0;
}

/*
 * Do a shell escape
 */
/*ARGSUSED*/
shell(argc, argv)
	int argc;
	char **argv;
{
	int pid;
	sig_t old1, old2;
	char shellnam[40], *shell, *namep; 
#if defined(SOLARIS) || defined(__alpha) || defined(SCO) || defined(ISC)
        int     status;
#else
        union wait status;
#endif

	old1 = signal (SIGINT, SIG_IGN);
	old2 = signal (SIGQUIT, SIG_IGN);
	if ((pid = fork()) == 0) {
		for (pid = 3; pid < 20; pid++)
			(void) close(pid);
		(void) signal(SIGINT, SIG_DFL);
		(void) signal(SIGQUIT, SIG_DFL);
		shell = getenv("SHELL");
		if (shell == NULL)
			shell = _PATH_BSHELL;
		namep = rindex(shell,'/');
		if (namep == NULL)
			namep = shell;
		(void) strcpy(shellnam,"-");
		(void) strcat(shellnam, ++namep);
		if (strcmp(namep, "sh") != 0)
			shellnam[0] = '+';
		if (debug) {
			printf ("%s\n", shell);
			(void) fflush (stdout);
		}
		if (argc > 1) {
			execl(shell,shellnam,"-c",altarg,(char *)0);
		}
		else {
			execl(shell,shellnam,(char *)0);
		}
		perror(shell);
		code = -1;
		exit(1);
		}
	if (pid > 0)
#if defined(SOLARIS) || defined(__alpha)
                while (wait(&status) != pid) ;
#else
                while (wait((int *)&status) != pid) ;
#endif
	(void) signal(SIGINT, old1);
	(void) signal(SIGQUIT, old2);
	if (pid == -1) {
		perror("Try again later");
		code = -1;
	}
	else {
		code = 0;
	}
	return (0);
}

/*
 * Send new user information (re-login)
 */
user(argc, argv)
	int argc;
	char **argv;
{
	char acct[80], *getpass();
	int n, aflag = 0;

	if (argc < 2)
		(void) another(&argc, &argv, "username");
	if (argc < 2 || argc > 4) {
		printf("usage: %s username [password] [account]\n", argv[0]);
		code = -1;
		return (0);
	}
	n = command("USER %s", argv[1]);
	if (n == CONTINUE) {
		if (argc < 3 ){
			if (strcmp(argv[1], "anonymous") == 0) {
				printf("Password: "); (void) fflush(stdout);
				(void) fgets(acct, sizeof(acct) - 1, stdin);
				acct[strlen(acct) - 1] = '\0';
				argv[2] = acct;
			} else
				argv[2] = getpass("Password: ");
			argc++;
		}
		n = command("PASS %s", argv[2]);
	}
	if (n == CONTINUE) {
		if (argc < 4) {
			printf("Account: "); (void) fflush(stdout);
			(void) fgets(acct, sizeof(acct) - 1, stdin);
			acct[strlen(acct) - 1] = '\0';
			argv[3] = acct; argc++;
		}
		n = command("ACCT %s", argv[3]);
		aflag++;
	}
	if (n != COMPLETE) {
		fprintf(stdout, "Login failed.\n");
		return (0);
	}
	if (!aflag && argc == 4) {
		(void) command("ACCT %s", argv[3]);
	}
	return (1);
}

/*
 * Print working directory.
 */
/*VARARGS*/
pwd()
{
	int oldverbose = verbose;

	/*
	 * If we aren't verbose, this doesn't do anything!
	 */
	verbose = 1;
	if (command("PWD") == ERROR && code == 500) {
		printf("PWD command not recognized, trying XPWD\n");
		(void) command("XPWD");
	}
	verbose = oldverbose;
}

/*
 * Make a directory.
 */
makedir(argc, argv)
	int argc;
	char *argv[];
{

	if (argc < 2 && !another(&argc, &argv, "directory-name")) {
		printf("usage: %s directory-name\n", argv[0]);
		code = -1;
		return;
	}
	if (command("MKD %s", argv[1]) == ERROR && code == 500) {
		if (verbose)
			printf("MKD command not recognized, trying XMKD\n");
		(void) command("XMKD %s", argv[1]);
	}
}

/*
 * Remove a directory.
 */
removedir(argc, argv)
	int argc;
	char *argv[];
{

	if (argc < 2 && !another(&argc, &argv, "directory-name")) {
		printf("usage: %s directory-name\n", argv[0]);
		code = -1;
		return;
	}
	if (command("RMD %s", argv[1]) == ERROR && code == 500) {
		if (verbose)
			printf("RMD command not recognized, trying XRMD\n");
		(void) command("XRMD %s", argv[1]);
	}
}

/*
 * Send a line, verbatim, to the remote machine.
 */
quote(argc, argv)
	int argc;
	char *argv[];
{

	if (argc < 2 && !another(&argc, &argv, "command line to send")) {
		printf("usage: %s line-to-send\n", argv[0]);
		code = -1;
		return;
	}
	quote1("", argc, argv);
}

/*
 * Send a SITE command to the remote machine.  The line
 * is sent verbatim to the remote machine, except that the
 * word "SITE" is added at the front.
 */
site(argc, argv)