2 * Copyright (c) 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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35 static const char sccsid[] = "@(#)terminal.c 8.2 (Berkeley) 2/16/95";
38 #include <arpa/telnet.h>
39 #include <sys/types.h>
46 #if defined(ENCRYPTION)
47 #include <libtelnet/encrypt.h>
50 Ring ttyoring, ttyiring;
51 unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ];
53 int termdata; /* Debugging flag */
60 cc_t termLiteralNextChar;
92 * initialize the terminal data structures.
98 if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) {
101 if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) {
104 autoflush = TerminalAutoFlush();
109 * Send as much data as possible to the terminal.
112 * -1: No useful work done, data waiting to go out.
113 * 0: No data was waiting, so nothing was done.
114 * 1: All waiting data was written out.
115 * n: All data - n was written out.
123 register int n, n0, n1;
125 n0 = ring_full_count(&ttyoring);
126 if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
128 TerminalFlushOutput();
129 /* we leave 'n' alone! */
131 n = TerminalWrite(ttyoring.consume, n);
136 Dump('>', ttyoring.consume, n);
139 * If we wrote everything, and the full count is
140 * larger than what we wrote, then write the
141 * rest of the buffer.
143 if (n1 == n && n0 > n) {
146 n1 = TerminalWrite(ttyoring.bottom, n1);
150 ring_consumed(&ttyoring, n);
164 * These routines decides on what the mode should be (based on the values
165 * of various global variables).
174 #ifdef KLUDGELINEMODE
175 extern int kludgelinemode;
181 if (my_want_state_is_dont(TELOPT_ECHO))
187 if (my_want_state_is_will(TELOPT_BINARY))
190 if (his_want_state_is_will(TELOPT_BINARY))
193 #ifdef KLUDGELINEMODE
194 if (kludgelinemode) {
195 if (my_want_state_is_dont(TELOPT_SGA)) {
196 mode |= (MODE_TRAPSIG|MODE_EDIT);
197 if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) {
204 if (my_want_state_is_will(TELOPT_LINEMODE))
214 static int enc_passwd = 0;
215 #endif /* ENCRYPTION */
216 register int newmode;
218 newmode = getconnmode()|(force?MODE_FORCE:0);
220 TerminalNewMode(newmode);
223 if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) {
224 if (my_want_state_is_will(TELOPT_ENCRYPT)
225 && (enc_passwd == 0) && !encrypt_output) {
226 encrypt_request_start(0, 0);
231 encrypt_request_end();
235 #endif /* ENCRYPTION */