utility.c

早期freebsd实现

		if (pointer[1] == 1)
		    sprintf(nfrontp, " SEND");
		else
		    sprintf(nfrontp, " %d (unknown)", pointer[1]);
		nfrontp += strlen(nfrontp);
		for (i = 2; i < length; i++) {
		    sprintf(nfrontp, " ?%d?", pointer[i]);
		    nfrontp += strlen(nfrontp);
		}
		break;
	    }
	    break;

	case TELOPT_LFLOW:
	    sprintf(nfrontp, "TOGGLE-FLOW-CONTROL");
	    nfrontp += strlen(nfrontp);
	    if (length < 2) {
		sprintf(nfrontp, " (empty suboption??\?)");
		nfrontp += strlen(nfrontp);
		break;
	    }
	    switch (pointer[1]) {
	    case LFLOW_OFF:
		sprintf(nfrontp, " OFF"); break;
	    case LFLOW_ON:
		sprintf(nfrontp, " ON"); break;
	    case LFLOW_RESTART_ANY:
		sprintf(nfrontp, " RESTART-ANY"); break;
	    case LFLOW_RESTART_XON:
		sprintf(nfrontp, " RESTART-XON"); break;
	    default:
		sprintf(nfrontp, " %d (unknown)", pointer[1]);
	    }
	    nfrontp += strlen(nfrontp);
	    for (i = 2; i < length; i++) {
		sprintf(nfrontp, " ?%d?", pointer[i]);
		nfrontp += strlen(nfrontp);
	    }
	    break;

	case TELOPT_NAWS:
	    sprintf(nfrontp, "NAWS");
	    nfrontp += strlen(nfrontp);
	    if (length < 2) {
		sprintf(nfrontp, " (empty suboption??\?)");
		nfrontp += strlen(nfrontp);
		break;
	    }
	    if (length == 2) {
		sprintf(nfrontp, " ?%d?", pointer[1]);
		nfrontp += strlen(nfrontp);
		break;
	    }
	    sprintf(nfrontp, " %d %d (%d)",
		pointer[1], pointer[2],
		(int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2])));
	    nfrontp += strlen(nfrontp);
	    if (length == 4) {
		sprintf(nfrontp, " ?%d?", pointer[3]);
		nfrontp += strlen(nfrontp);
		break;
	    }
	    sprintf(nfrontp, " %d %d (%d)",
		pointer[3], pointer[4],
		(int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4])));
	    nfrontp += strlen(nfrontp);
	    for (i = 5; i < length; i++) {
		sprintf(nfrontp, " ?%d?", pointer[i]);
		nfrontp += strlen(nfrontp);
	    }
	    break;

	case TELOPT_LINEMODE:
	    sprintf(nfrontp, "LINEMODE ");
	    nfrontp += strlen(nfrontp);
	    if (length < 2) {
		sprintf(nfrontp, " (empty suboption??\?)");
		nfrontp += strlen(nfrontp);
		break;
	    }
	    switch (pointer[1]) {
	    case WILL:
		sprintf(nfrontp, "WILL ");
		goto common;
	    case WONT:
		sprintf(nfrontp, "WONT ");
		goto common;
	    case DO:
		sprintf(nfrontp, "DO ");
		goto common;
	    case DONT:
		sprintf(nfrontp, "DONT ");
	    common:
		nfrontp += strlen(nfrontp);
		if (length < 3) {
		    sprintf(nfrontp, "(no option??\?)");
		    nfrontp += strlen(nfrontp);
		    break;
		}
		switch (pointer[2]) {
		case LM_FORWARDMASK:
		    sprintf(nfrontp, "Forward Mask");
		    nfrontp += strlen(nfrontp);
		    for (i = 3; i < length; i++) {
			sprintf(nfrontp, " %x", pointer[i]);
			nfrontp += strlen(nfrontp);
		    }
		    break;
		default:
		    sprintf(nfrontp, "%d (unknown)", pointer[2]);
		    nfrontp += strlen(nfrontp);
		    for (i = 3; i < length; i++) {
			sprintf(nfrontp, " %d", pointer[i]);
			nfrontp += strlen(nfrontp);
		    }
		    break;
		}
		break;
		
	    case LM_SLC:
		sprintf(nfrontp, "SLC");
		nfrontp += strlen(nfrontp);
		for (i = 2; i < length - 2; i += 3) {
		    if (SLC_NAME_OK(pointer[i+SLC_FUNC]))
			sprintf(nfrontp, " %s", SLC_NAME(pointer[i+SLC_FUNC]));
		    else
			sprintf(nfrontp, " %d", pointer[i+SLC_FUNC]);
		    nfrontp += strlen(nfrontp);
		    switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) {
		    case SLC_NOSUPPORT:
			sprintf(nfrontp, " NOSUPPORT"); break;
		    case SLC_CANTCHANGE:
			sprintf(nfrontp, " CANTCHANGE"); break;
		    case SLC_VARIABLE:
			sprintf(nfrontp, " VARIABLE"); break;
		    case SLC_DEFAULT:
			sprintf(nfrontp, " DEFAULT"); break;
		    }
		    nfrontp += strlen(nfrontp);
		    sprintf(nfrontp, "%s%s%s",
			pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "",
			pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "",
			pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : "");
		    nfrontp += strlen(nfrontp);
		    if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN|
						SLC_FLUSHOUT| SLC_LEVELBITS)) {
			sprintf(nfrontp, "(0x%x)", pointer[i+SLC_FLAGS]);
			nfrontp += strlen(nfrontp);
		    }
		    sprintf(nfrontp, " %d;", pointer[i+SLC_VALUE]);
		    nfrontp += strlen(nfrontp);
		    if ((pointer[i+SLC_VALUE] == IAC) &&
			(pointer[i+SLC_VALUE+1] == IAC))
				i++;
		}
		for (; i < length; i++) {
		    sprintf(nfrontp, " ?%d?", pointer[i]);
		    nfrontp += strlen(nfrontp);
		}
		break;

	    case LM_MODE:
		sprintf(nfrontp, "MODE ");
		nfrontp += strlen(nfrontp);
		if (length < 3) {
		    sprintf(nfrontp, "(no mode??\?)");
		    nfrontp += strlen(nfrontp);
		    break;
		}
		{
		    char tbuf[32];
		    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" : "");
		    sprintf(nfrontp, "%s", tbuf[1] ? &tbuf[1] : "0");
		    nfrontp += strlen(nfrontp);
		}
		if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) {
		    sprintf(nfrontp, " (0x%x)", pointer[2]);
		    nfrontp += strlen(nfrontp);
		}
		for (i = 3; i < length; i++) {
		    sprintf(nfrontp, " ?0x%x?", pointer[i]);
		    nfrontp += strlen(nfrontp);
		}
		break;
	    default:
		sprintf(nfrontp, "%d (unknown)", pointer[1]);
		nfrontp += strlen(nfrontp);
		for (i = 2; i < length; i++) {
		    sprintf(nfrontp, " %d", pointer[i]);
		    nfrontp += strlen(nfrontp);
		}
	    }
	    break;

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

	    sprintf(nfrontp, "STATUS");
	    nfrontp += strlen(nfrontp);

	    switch (pointer[1]) {
	    default:
		if (pointer[1] == TELQUAL_SEND)
		    sprintf(nfrontp, " SEND");
		else
		    sprintf(nfrontp, " %d (unknown)", pointer[1]);
		nfrontp += strlen(nfrontp);
		for (i = 2; i < length; i++) {
		    sprintf(nfrontp, " ?%d?", pointer[i]);
		    nfrontp += strlen(nfrontp);
		}
		break;
	    case TELQUAL_IS:
		sprintf(nfrontp, " IS\r\n");
		nfrontp += strlen(nfrontp);

		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(pointer[i]))
			    sprintf(nfrontp, " %s %s", cp, TELOPT(pointer[i]));
			else
			    sprintf(nfrontp, " %s %d", cp, pointer[i]);
			nfrontp += strlen(nfrontp);

			sprintf(nfrontp, "\r\n");
			nfrontp += strlen(nfrontp);
			break;

		    case SB:
			sprintf(nfrontp, " SB ");
			nfrontp += strlen(nfrontp);
			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) {
			    sprintf(nfrontp, " SE");
			    nfrontp += strlen(nfrontp);
			    i = j;
			} else
			    i = j - 1;

			sprintf(nfrontp, "\r\n");
			nfrontp += strlen(nfrontp);

			break;
				
		    default:
			sprintf(nfrontp, " %d", pointer[i]);
			nfrontp += strlen(nfrontp);
			break;
		    }
		}
		break;
	    }
	    break;
	  }

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

	case TELOPT_NEW_ENVIRON:
	    sprintf(nfrontp, "NEW-ENVIRON ");
	    goto env_common1;
	case TELOPT_OLD_ENVIRON:
	    sprintf(nfrontp, "OLD-ENVIRON");
	env_common1:
	    nfrontp += strlen(nfrontp);
	    switch (pointer[1]) {
	    case TELQUAL_IS:
		sprintf(nfrontp, "IS ");
		goto env_common;
	    case TELQUAL_SEND:
		sprintf(nfrontp, "SEND ");
		goto env_common;
	    case TELQUAL_INFO:
		sprintf(nfrontp, "INFO ");
	    env_common:
		nfrontp += strlen(nfrontp);
		{
		    register int noquote = 2;
		    for (i = 2; i < length; i++ ) {
			switch (pointer[i]) {
			case NEW_ENV_VAR:
			    sprintf(nfrontp, "\" VAR " + noquote);
			    nfrontp += strlen(nfrontp);
			    noquote = 2;
			    break;

			case NEW_ENV_VALUE:
			    sprintf(nfrontp, "\" VALUE " + noquote);
			    nfrontp += strlen(nfrontp);
			    noquote = 2;
			    break;

			case ENV_ESC:
			    sprintf(nfrontp, "\" ESC " + noquote);
			    nfrontp += strlen(nfrontp);
			    noquote = 2;
			    break;

			case ENV_USERVAR:
			    sprintf(nfrontp, "\" USERVAR " + noquote);
			    nfrontp += strlen(nfrontp);
			    noquote = 2;
			    break;

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

#if	defined(AUTHENTICATION)
	case TELOPT_AUTHENTICATION:
	    sprintf(nfrontp, "AUTHENTICATION");
	    nfrontp += strlen(nfrontp);
	
	    if (length < 2) {
		sprintf(nfrontp, " (empty suboption??\?)");
		nfrontp += strlen(nfrontp);
		break;
	    }
	    switch (pointer[1]) {
	    case TELQUAL_REPLY:
	    case TELQUAL_IS:
		sprintf(nfrontp, " %s ", (pointer[1] == TELQUAL_IS) ?
							"IS" : "REPLY");
		nfrontp += strlen(nfrontp);
		if (AUTHTYPE_NAME_OK(pointer[2]))
		    sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[2]));
		else
		    sprintf(nfrontp, "%d ", pointer[2]);
		nfrontp += strlen(nfrontp);
		if (length < 3) {
		    sprintf(nfrontp, "(partial suboption??\?)");
		    nfrontp += strlen(nfrontp);
		    break;
		}
		sprintf(nfrontp, "%s|%s",
			((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
			"CLIENT" : "SERVER",
			((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
			"MUTUAL" : "ONE-WAY");
		nfrontp += strlen(nfrontp);

		auth_printsub(&pointer[1], length - 1, buf, sizeof(buf));
		sprintf(nfrontp, "%s", buf);
		nfrontp += strlen(nfrontp);
		break;

	    case TELQUAL_SEND:
		i = 2;
		sprintf(nfrontp, " SEND ");
		nfrontp += strlen(nfrontp);
		while (i < length) {
		    if (AUTHTYPE_NAME_OK(pointer[i]))
			sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[i]));
		    else
			sprintf(nfrontp, "%d ", pointer[i]);
		    nfrontp += strlen(nfrontp);
		    if (++i >= length) {
			sprintf(nfrontp, "(partial suboption??\?)");
			nfrontp += strlen(nfrontp);
			break;
		    }
		    sprintf(nfrontp, "%s|%s ",
			((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
							"CLIENT" : "SERVER",
			((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
							"MUTUAL" : "ONE-WAY");
		    nfrontp += strlen(nfrontp);
		    ++i;
		}
		break;

	    case TELQUAL_NAME:
		i = 2;
		sprintf(nfrontp, " NAME \"");
		nfrontp += strlen(nfrontp);
		while (i < length)
		    *nfrontp += pointer[i++];
		*nfrontp += '"';
		break;

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

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

	    case ENCRYPT_END:
		sprintf(nfrontp, " END");
		nfrontp += strlen(nfrontp);
		break;

	    case ENCRYPT_REQSTART:
		sprintf(nfrontp, " REQUEST-START");
		nfrontp += strlen(nfrontp);
		break;

	    case ENCRYPT_REQEND:
		sprintf(nfrontp, " REQUEST-END");
		nfrontp += strlen(nfrontp);
		break;

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

		encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf));
		sprintf(nfrontp, "%s", buf);
		nfrontp += strlen(nfrontp);
		break;

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

	    case ENCRYPT_ENC_KEYID:
		sprintf(nfrontp, " ENC_KEYID", pointer[1]);
		nfrontp += strlen(nfrontp);
		goto encommon;

	    case ENCRYPT_DEC_KEYID:
		sprintf(nfrontp, " DEC_KEYID", pointer[1]);
		nfrontp += strlen(nfrontp);
		goto encommon;

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

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

/*
 * Dump a data buffer in hex and ascii to the output data stream.
 */
	void
printdata(tag, ptr, cnt)
	register char *tag;
	register char *ptr;
	register int cnt;
{
	register int i;
	char xbuf[30];

	while (cnt) {
		/* flush net output buffer if no room for new data) */
		if ((&netobuf[BUFSIZ] - nfrontp) < 80) {
			netflush();
		}

		/* add a line of output */
		sprintf(nfrontp, "%s: ", tag);
		nfrontp += strlen(nfrontp);
		for (i = 0; i < 20 && cnt; i++) {
			sprintf(nfrontp, "%02x", *ptr);
			nfrontp += strlen(nfrontp); 
			if (isprint(*ptr)) {
				xbuf[i] = *ptr;
			} else {
				xbuf[i] = '.';
			}
			if (i % 2) { 
				*nfrontp = ' ';
				nfrontp++;
			}
			cnt--;
			ptr++;
		}
		xbuf[i] = '\0';
		sprintf(nfrontp, " %s\r\n", xbuf );
		nfrontp += strlen(nfrontp);
	} 
}
#endif /* DIAGNOSTICS */