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
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 static const char sccsid[] = "@(#)terminal.c 8.2 (Berkeley) 2/16/95";
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
42 #include <arpa/telnet.h>
43 #include <sys/types.h>
53 #include <libtelnet/encrypt.h>
56 Ring ttyoring, ttyiring;
57 unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ];
59 int termdata; /* Debugging flag */
66 cc_t termLiteralNextChar;
98 * initialize the terminal data structures.
104 if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) {
107 if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) {
110 autoflush = TerminalAutoFlush();
114 * Send as much data as possible to the terminal, else exits if
115 * it encounters a permanent failure when writing to the tty.
118 * -1: No useful work done, data waiting to go out.
119 * 0: No data was waiting, so nothing was done.
120 * 1: All waiting data was written out.
121 * n: All data - n was written out.
129 n0 = ring_full_count(&ttyoring);
130 if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
132 TerminalFlushOutput();
133 /* we leave 'n' alone! */
135 n = TerminalWrite(ttyoring.consume, n);
140 Dump('>', ttyoring.consume, n);
143 * If we wrote everything, and the full count is
144 * larger than what we wrote, then write the
145 * rest of the buffer.
147 if (n1 == n && n0 > n) {
150 n1 = TerminalWrite(ttyoring.bottom, n1);
154 ring_consumed(&ttyoring, n);
157 if (errno == EAGAIN || errno == EINTR) {
160 ring_consumed(&ttyoring, ring_full_count(&ttyoring));
164 fprintf(stderr, "Write error on local output.\n");
179 * These routines decides on what the mode should be (based on the values
180 * of various global variables).
189 #ifdef KLUDGELINEMODE
190 extern int kludgelinemode;
193 if (my_want_state_is_dont(TELOPT_ECHO))
199 if (my_want_state_is_will(TELOPT_BINARY))
202 if (his_want_state_is_will(TELOPT_BINARY))
205 #ifdef KLUDGELINEMODE
206 if (kludgelinemode) {
207 if (my_want_state_is_dont(TELOPT_SGA)) {
208 mode |= (MODE_TRAPSIG|MODE_EDIT);
209 if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) {
216 if (my_want_state_is_will(TELOPT_LINEMODE))
222 setconnmode(int force)
225 static int enc_passwd = 0;
226 #endif /* ENCRYPTION */
229 newmode = getconnmode()|(force?MODE_FORCE:0);
231 TerminalNewMode(newmode);
234 if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) {
235 if (my_want_state_is_will(TELOPT_ENCRYPT)
236 && (enc_passwd == 0) && !encrypt_output) {
237 encrypt_request_start(0, 0);
242 encrypt_request_end();
246 #endif /* ENCRYPTION */