Correct param.h entry for this version.
[dragonfly.git] / usr.bin / telnet / terminal.c
blob4e385e8e375fd6334abdc902bbb90954f0e3ba72
1 /*
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
7 * are met:
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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
29 * @(#)terminal.c 8.2 (Berkeley) 2/16/95
30 * $FreeBSD: src/crypto/telnet/telnet/terminal.c,v 1.2.8.2 2002/04/13 10:59:08 markm Exp $
31 * $DragonFly: src/crypto/telnet/telnet/terminal.c,v 1.2 2003/06/17 04:24:37 dillon Exp $
34 #include <arpa/telnet.h>
35 #include <sys/types.h>
36 #include <stdlib.h>
38 #include "ring.h"
40 #include "externs.h"
41 #include "types.h"
43 #ifdef ENCRYPTION
44 #include <libtelnet/encrypt.h>
45 #endif
47 Ring ttyoring, ttyiring;
48 unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ];
50 int termdata; /* Debugging flag */
52 #ifdef USE_TERMIO
53 # ifndef VDISCARD
54 cc_t termFlushChar;
55 # endif
56 # ifndef VLNEXT
57 cc_t termLiteralNextChar;
58 # endif
59 # ifndef VSUSP
60 cc_t termSuspChar;
61 # endif
62 # ifndef VWERASE
63 cc_t termWerasChar;
64 # endif
65 # ifndef VREPRINT
66 cc_t termRprntChar;
67 # endif
68 # ifndef VSTART
69 cc_t termStartChar;
70 # endif
71 # ifndef VSTOP
72 cc_t termStopChar;
73 # endif
74 # ifndef VEOL
75 cc_t termForw1Char;
76 # endif
77 # ifndef VEOL2
78 cc_t termForw2Char;
79 # endif
80 # ifndef VSTATUS
81 cc_t termAytChar;
82 # endif
83 #else
84 cc_t termForw2Char;
85 cc_t termAytChar;
86 #endif
89 * initialize the terminal data structures.
92 void
93 init_terminal(void)
95 if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) {
96 exit(1);
98 if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) {
99 exit(1);
101 autoflush = TerminalAutoFlush();
105 * Send as much data as possible to the terminal.
107 * Return value:
108 * -1: No useful work done, data waiting to go out.
109 * 0: No data was waiting, so nothing was done.
110 * 1: All waiting data was written out.
111 * n: All data - n was written out.
115 ttyflush(int drop)
117 int n, n0, n1;
119 n0 = ring_full_count(&ttyoring);
120 if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
121 if (drop) {
122 TerminalFlushOutput();
123 /* we leave 'n' alone! */
124 } else {
125 n = TerminalWrite(ttyoring.consume, n);
128 if (n > 0) {
129 if (termdata && n) {
130 Dump('>', ttyoring.consume, n);
133 * If we wrote everything, and the full count is
134 * larger than what we wrote, then write the
135 * rest of the buffer.
137 if (n1 == n && n0 > n) {
138 n1 = n0 - n;
139 if (!drop)
140 n1 = TerminalWrite(ttyoring.bottom, n1);
141 if (n1 > 0)
142 n += n1;
144 ring_consumed(&ttyoring, n);
146 if (n < 0)
147 return -1;
148 if (n == n0) {
149 if (n0)
150 return -1;
151 return 0;
153 return n0 - n + 1;
158 * These routines decides on what the mode should be (based on the values
159 * of various global variables).
164 getconnmode(void)
166 extern int linemode;
167 int mode = 0;
168 #ifdef KLUDGELINEMODE
169 extern int kludgelinemode;
170 #endif
172 if (my_want_state_is_dont(TELOPT_ECHO))
173 mode |= MODE_ECHO;
175 if (localflow)
176 mode |= MODE_FLOW;
178 if (my_want_state_is_will(TELOPT_BINARY))
179 mode |= MODE_INBIN;
181 if (his_want_state_is_will(TELOPT_BINARY))
182 mode |= MODE_OUTBIN;
184 #ifdef KLUDGELINEMODE
185 if (kludgelinemode) {
186 if (my_want_state_is_dont(TELOPT_SGA)) {
187 mode |= (MODE_TRAPSIG|MODE_EDIT);
188 if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) {
189 mode &= ~MODE_ECHO;
192 return(mode);
194 #endif
195 if (my_want_state_is_will(TELOPT_LINEMODE))
196 mode |= linemode;
197 return(mode);
200 void
201 setconnmode(int force)
203 #ifdef ENCRYPTION
204 static int enc_passwd = 0;
205 #endif /* ENCRYPTION */
206 int newmode;
208 newmode = getconnmode()|(force?MODE_FORCE:0);
210 TerminalNewMode(newmode);
212 #ifdef ENCRYPTION
213 if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) {
214 if (my_want_state_is_will(TELOPT_ENCRYPT)
215 && (enc_passwd == 0) && !encrypt_output) {
216 encrypt_request_start(0, 0);
217 enc_passwd = 1;
219 } else {
220 if (enc_passwd) {
221 encrypt_request_end();
222 enc_passwd = 0;
225 #endif /* ENCRYPTION */
229 void
230 setcommandmode(void)
232 TerminalNewMode(-1);