utilities.c

linux 下 telnet源码

		break;

	    case TELQUAL_NAME:
		i = 2;
		fprintf(NetTrace, " NAME \"");
		while (i < length)
		    putc(pointer[i++], NetTrace);
		putc('"', NetTrace);
		break;

	    default:
		    for (i = 2; i < length; i++)
			fprintf(NetTrace, " ?%d?", pointer[i]);
		    break;
	    }
	    break;
#endif

#ifdef	ENCRYPTION
	case TELOPT_ENCRYPT:
	    fprintf(NetTrace, "ENCRYPT");
	    if (length < 2) {
		fprintf(NetTrace, " (empty suboption??\?)");
		break;
	    }
	    switch (pointer[1]) {
	    case ENCRYPT_START:
		fprintf(NetTrace, " START");
		break;

	    case ENCRYPT_END:
		fprintf(NetTrace, " END");
		break;

	    case ENCRYPT_REQSTART:
		fprintf(NetTrace, " REQUEST-START");
		break;

	    case ENCRYPT_REQEND:
		fprintf(NetTrace, " REQUEST-END");
		break;

	    case ENCRYPT_IS:
	    case ENCRYPT_REPLY:
		fprintf(NetTrace, " %s ", (pointer[1] == ENCRYPT_IS) ?
							"IS" : "REPLY");
		if (length < 3) {
		    fprintf(NetTrace, " (partial suboption??\?)");
		    break;
		}
		if (ENCTYPE_NAME_OK(pointer[2]))
		    fprintf(NetTrace, "%s ", ENCTYPE_NAME(pointer[2]));
		else
		    fprintf(NetTrace, " %d (unknown)", pointer[2]);

		encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf));
		fprintf(NetTrace, "%s", buf);
		break;

	    case ENCRYPT_SUPPORT:
		i = 2;
		fprintf(NetTrace, " SUPPORT ");
		while (i < length) {
		    if (ENCTYPE_NAME_OK(pointer[i]))
			fprintf(NetTrace, "%s ", ENCTYPE_NAME(pointer[i]));
		    else
			fprintf(NetTrace, "%d ", pointer[i]);
		    i++;
		}
		break;

	    case ENCRYPT_ENC_KEYID:
		fprintf(NetTrace, " ENC_KEYID ");
		goto encommon;

	    case ENCRYPT_DEC_KEYID:
		fprintf(NetTrace, " DEC_KEYID ");
		goto encommon;

	    default:
		fprintf(NetTrace, " %d (unknown)", pointer[1]);
	    encommon:
		for (i = 2; i < length; i++)
		    fprintf(NetTrace, " %d", pointer[i]);
		break;
	    }
	    break;
#endif	/* ENCRYPTION */

	case TELOPT_LINEMODE:
	    fprintf(NetTrace, "LINEMODE ");
	    if (length < 2) {
		fprintf(NetTrace, " (empty suboption??\?)");
		break;
	    }
	    switch (pointer[1]) {
	    case WILL:
		fprintf(NetTrace, "WILL ");
		goto common;
	    case WONT:
		fprintf(NetTrace, "WONT ");
		goto common;
	    case DO:
		fprintf(NetTrace, "DO ");
		goto common;
	    case DONT:
		fprintf(NetTrace, "DONT ");
	    common:
		if (length < 3) {
		    fprintf(NetTrace, "(no option??\?)");
		    break;
		}
		switch (pointer[2]) {
		case LM_FORWARDMASK:
		    fprintf(NetTrace, "Forward Mask");
		    for (i = 3; i < length; i++)
			fprintf(NetTrace, " %x", pointer[i]);
		    break;
		default:
		    fprintf(NetTrace, "%d (unknown)", pointer[2]);
		    for (i = 3; i < length; i++)
			fprintf(NetTrace, " %d", pointer[i]);
		    break;
		}
		break;

	    case LM_SLC:
		fprintf(NetTrace, "SLC");
		for (i = 2; i < length - 2; i += 3) {
		    if (SLC_NAME_OK(pointer[i+SLC_FUNC]))
			fprintf(NetTrace, " %s", SLC_NAME(pointer[i+SLC_FUNC]));
		    else
			fprintf(NetTrace, " %d", pointer[i+SLC_FUNC]);
		    switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) {
		    case SLC_NOSUPPORT:
			fprintf(NetTrace, " NOSUPPORT"); break;
		    case SLC_CANTCHANGE:
			fprintf(NetTrace, " CANTCHANGE"); break;
		    case SLC_VARIABLE:
			fprintf(NetTrace, " VARIABLE"); break;
		    case SLC_DEFAULT:
			fprintf(NetTrace, " DEFAULT"); break;
		    }
		    fprintf(NetTrace, "%s%s%s",
			pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "",
			pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "",
			pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : "");
		    if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN|
						SLC_FLUSHOUT| SLC_LEVELBITS))
			fprintf(NetTrace, "(0x%x)", pointer[i+SLC_FLAGS]);
		    fprintf(NetTrace, " %d;", pointer[i+SLC_VALUE]);
		    if ((pointer[i+SLC_VALUE] == IAC) &&
			(pointer[i+SLC_VALUE+1] == IAC))
				i++;
		}
		for (; i < length; i++)
		    fprintf(NetTrace, " ?%d?", pointer[i]);
		break;

	    case LM_MODE:
		fprintf(NetTrace, "MODE ");
		if (length < 3) {
		    fprintf(NetTrace, "(no mode??\?)");
		    break;
		}
		{
		    char tbuf[64];
		    sprintf(tbuf, "%s%s%s%s%s",
			pointer[2]&MODE_EDIT ? "|EDIT" : "",
			pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "",
			pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "",
			pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "",
			pointer[2]&MODE_ACK ? "|ACK" : "");
		    fprintf(NetTrace, "%s", tbuf[1] ? &tbuf[1] : "0");
		}
		if (pointer[2]&~(MODE_MASK))
		    fprintf(NetTrace, " (0x%x)", pointer[2]);
		for (i = 3; i < length; i++)
		    fprintf(NetTrace, " ?0x%x?", pointer[i]);
		break;
	    default:
		fprintf(NetTrace, "%d (unknown)", pointer[1]);
		for (i = 2; i < length; i++)
		    fprintf(NetTrace, " %d", pointer[i]);
	    }
	    break;

	case TELOPT_STATUS: {
	    register char *cp;
	    register int j, k;

	    fprintf(NetTrace, "STATUS");

	    switch (pointer[1]) {
	    default:
		if (pointer[1] == TELQUAL_SEND)
		    fprintf(NetTrace, " SEND");
		else
		    fprintf(NetTrace, " %d (unknown)", pointer[1]);
		for (i = 2; i < length; i++)
		    fprintf(NetTrace, " ?%d?", pointer[i]);
		break;
	    case TELQUAL_IS:
		if (--want_status_response < 0)
		    want_status_response = 0;
		if (NetTrace == stdout)
		    fprintf(NetTrace, " IS\r\n");
		else
		    fprintf(NetTrace, " IS\n");

		for (i = 2; i < length; i++) {
		    switch(pointer[i]) {
		    case DO:	cp = "DO"; goto common2;
		    case DONT:	cp = "DONT"; goto common2;
		    case WILL:	cp = "WILL"; goto common2;
		    case WONT:	cp = "WONT"; goto common2;
		    common2:
			i++;
			if (TELOPT_OK((int)pointer[i]))
			    fprintf(NetTrace, " %s %s", cp, TELOPT(pointer[i]));
			else
			    fprintf(NetTrace, " %s %d", cp, pointer[i]);

			if (NetTrace == stdout)
			    fprintf(NetTrace, "\r\n");
			else
			    fprintf(NetTrace, "\n");
			break;

		    case SB:
			fprintf(NetTrace, " SB ");
			i++;
			j = k = i;
			while (j < length) {
			    if (pointer[j] == SE) {
				if (j+1 == length)
				    break;
				if (pointer[j+1] == SE)
				    j++;
				else
				    break;
			    }
			    pointer[k++] = pointer[j++];
			}
			printsub(0, &pointer[i], k - i);
			if (i < length) {
			    fprintf(NetTrace, " SE");
			    i = j;
			} else
			    i = j - 1;

			if (NetTrace == stdout)
			    fprintf(NetTrace, "\r\n");
			else
			    fprintf(NetTrace, "\n");

			break;

		    default:
			fprintf(NetTrace, " %d", pointer[i]);
			break;
		    }
		}
		break;
	    }
	    break;
	  }

	case TELOPT_XDISPLOC:
	    fprintf(NetTrace, "X-DISPLAY-LOCATION ");
	    switch (pointer[1]) {
	    case TELQUAL_IS:
		fprintf(NetTrace, "IS \"%.*s\"", length-2, (char *)pointer+2);
		break;
	    case TELQUAL_SEND:
		fprintf(NetTrace, "SEND");
		break;
	    default:
		fprintf(NetTrace, "- unknown qualifier %d (0x%x).",
				pointer[1], pointer[1]);
	    }
	    break;

	case TELOPT_NEW_ENVIRON:
	    fprintf(NetTrace, "NEW-ENVIRON ");
#ifdef	OLD_ENVIRON
	    goto env_common1;
	case TELOPT_OLD_ENVIRON:
	    fprintf(NetTrace, "OLD-ENVIRON");
	env_common1:
#endif
	    switch (pointer[1]) {
	    case TELQUAL_IS:
		fprintf(NetTrace, "IS ");
		goto env_common;
	    case TELQUAL_SEND:
		fprintf(NetTrace, "SEND ");
		goto env_common;
	    case TELQUAL_INFO:
		fprintf(NetTrace, "INFO ");
	    env_common:
		{
		    register int noquote = 2;
#if defined(ENV_HACK) && defined(OLD_ENVIRON)
		    extern int old_env_var, old_env_value;
#endif
		    for (i = 2; i < length; i++ ) {
			switch (pointer[i]) {
			case NEW_ENV_VALUE:
#ifdef OLD_ENVIRON
		     /*	case NEW_ENV_OVAR: */
			    if (pointer[0] == TELOPT_OLD_ENVIRON) {
# ifdef	ENV_HACK
				if (old_env_var == OLD_ENV_VALUE)
				    fprintf(NetTrace, "\" (VALUE) " + noquote);
				else
# endif
				    fprintf(NetTrace, "\" VAR " + noquote);
			    } else
#endif /* OLD_ENVIRON */
				fprintf(NetTrace, "\" VALUE " + noquote);
			    noquote = 2;
			    break;

			case NEW_ENV_VAR:
#ifdef OLD_ENVIRON
		     /* case OLD_ENV_VALUE: */
			    if (pointer[0] == TELOPT_OLD_ENVIRON) {
# ifdef	ENV_HACK
				if (old_env_value == OLD_ENV_VAR)
				    fprintf(NetTrace, "\" (VAR) " + noquote);
				else
# endif
				    fprintf(NetTrace, "\" VALUE " + noquote);
			    } else
#endif /* OLD_ENVIRON */
				fprintf(NetTrace, "\" VAR " + noquote);
			    noquote = 2;
			    break;

			case ENV_ESC:
			    fprintf(NetTrace, "\" ESC " + noquote);
			    noquote = 2;
			    break;

			case ENV_USERVAR:
			    fprintf(NetTrace, "\" USERVAR " + noquote);
			    noquote = 2;
			    break;

			default:
			def_case:
			    if (isprint(pointer[i]) && pointer[i] != '"') {
				if (noquote) {
				    putc('"', NetTrace);
				    noquote = 0;
				}
				putc(pointer[i], NetTrace);
			    } else {
				fprintf(NetTrace, "\" %03o " + noquote,
							pointer[i]);
				noquote = 2;
			    }
			    break;
			}
		    }
		    if (!noquote)
			putc('"', NetTrace);
		    break;
		}
	    }
	    break;

	default:
	    if (TELOPT_OK(pointer[0]))
		fprintf(NetTrace, "%s (unknown)", TELOPT(pointer[0]));
	    else
		fprintf(NetTrace, "%d (unknown)", pointer[0]);
	    for (i = 1; i < length; i++)
		fprintf(NetTrace, " %d", pointer[i]);
	    break;
	}
	if (direction) {
	    if (NetTrace == stdout)
		fprintf(NetTrace, "\r\n");
	    else
		fprintf(NetTrace, "\n");
	}
	if (NetTrace == stdout)
	    fflush(NetTrace);
    }
}

/* EmptyTerminal - called to make sure that the terminal buffer is empty.
 *			Note that we consider the buffer to run all the
 *			way to the kernel (thus the select).
 */

    void
EmptyTerminal()
{
#if	defined(unix)
    fd_set	o;

    FD_ZERO(&o);
#endif	/* defined(unix) */

    if (TTYBYTES() == 0) {
#if	defined(unix)
	FD_SET(tout, &o);
	(void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0,
			(struct timeval *) 0);	/* wait for TTLOWAT */
#endif	/* defined(unix) */
    } else {
	while (TTYBYTES()) {
	    (void) ttyflush(0);
#if	defined(unix)
	    FD_SET(tout, &o);
	    (void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0,
				(struct timeval *) 0);	/* wait for TTLOWAT */
#endif	/* defined(unix) */
	}
    }
}

    void
SetForExit()
{
    setconnmode(0);
#if	defined(TN3270)
    if (In3270) {
	Finish3270();
    }
#else	/* defined(TN3270) */
    do {
	(void)telrcv();			/* Process any incoming data */
	EmptyTerminal();
    } while (ring_full_count(&netiring));	/* While there is any */
#endif	/* defined(TN3270) */
    setcommandmode();
    fflush(stdout);
    fflush(stderr);
#if	defined(TN3270)
    if (In3270) {
	StopScreen(1);
    }
#endif	/* defined(TN3270) */
    setconnmode(0);
    EmptyTerminal();			/* Flush the path to the tty */
    setcommandmode();
}

    void
Exit(returnCode)
    int returnCode;
{
    SetForExit();
    exit(returnCode);
}

    void
ExitString(string, returnCode)
    char *string;
    int returnCode;
{
    SetForExit();
    fwrite(string, 1, strlen(string), stderr);
    exit(returnCode);
}