1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * Copyright 1994-2002 Sun Microsystems, Inc. All rights reserved.
3*0Sstevel@tonic-gate * Use is subject to license terms.
4*0Sstevel@tonic-gate */
5*0Sstevel@tonic-gate
6*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
7*0Sstevel@tonic-gate
8*0Sstevel@tonic-gate /*
9*0Sstevel@tonic-gate * usr/src/cmd/cmd-inet/usr.bin/telnet/terminal.c
10*0Sstevel@tonic-gate */
11*0Sstevel@tonic-gate
12*0Sstevel@tonic-gate /*
13*0Sstevel@tonic-gate * Copyright (c) 1988, 1990, 1993
14*0Sstevel@tonic-gate * The Regents of the University of California. All rights reserved.
15*0Sstevel@tonic-gate *
16*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
17*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions
18*0Sstevel@tonic-gate * are met:
19*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the above copyright
20*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
21*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
22*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
23*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
24*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software
25*0Sstevel@tonic-gate * must display the following acknowledgement:
26*0Sstevel@tonic-gate * This product includes software developed by the University of
27*0Sstevel@tonic-gate * California, Berkeley and its contributors.
28*0Sstevel@tonic-gate * 4. Neither the name of the University nor the names of its contributors
29*0Sstevel@tonic-gate * may be used to endorse or promote products derived from this software
30*0Sstevel@tonic-gate * without specific prior written permission.
31*0Sstevel@tonic-gate *
32*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42*0Sstevel@tonic-gate * SUCH DAMAGE.
43*0Sstevel@tonic-gate */
44*0Sstevel@tonic-gate
45*0Sstevel@tonic-gate #ifndef lint
46*0Sstevel@tonic-gate static char sccsid[] = "@(#)terminal.c 8.1 (Berkeley) 6/6/93";
47*0Sstevel@tonic-gate #endif /* not lint */
48*0Sstevel@tonic-gate
49*0Sstevel@tonic-gate #include <arpa/telnet.h>
50*0Sstevel@tonic-gate #include <sys/types.h>
51*0Sstevel@tonic-gate #include <errno.h>
52*0Sstevel@tonic-gate
53*0Sstevel@tonic-gate #include "ring.h"
54*0Sstevel@tonic-gate
55*0Sstevel@tonic-gate #include "externs.h"
56*0Sstevel@tonic-gate #include "types.h"
57*0Sstevel@tonic-gate
58*0Sstevel@tonic-gate Ring ttyoring;
59*0Sstevel@tonic-gate Ring ttyiring;
60*0Sstevel@tonic-gate static unsigned char ttyobuf[2*BUFSIZ];
61*0Sstevel@tonic-gate static unsigned char ttyibuf[BUFSIZ];
62*0Sstevel@tonic-gate
63*0Sstevel@tonic-gate int termdata; /* Debugging flag */
64*0Sstevel@tonic-gate
65*0Sstevel@tonic-gate #ifdef USE_TERMIO
66*0Sstevel@tonic-gate cc_t termAytChar;
67*0Sstevel@tonic-gate #else
68*0Sstevel@tonic-gate cc_t termForw2Char;
69*0Sstevel@tonic-gate cc_t termAytChar;
70*0Sstevel@tonic-gate #endif
71*0Sstevel@tonic-gate
72*0Sstevel@tonic-gate /*
73*0Sstevel@tonic-gate * initialize the terminal data structures.
74*0Sstevel@tonic-gate */
75*0Sstevel@tonic-gate
76*0Sstevel@tonic-gate void
init_terminal()77*0Sstevel@tonic-gate init_terminal()
78*0Sstevel@tonic-gate {
79*0Sstevel@tonic-gate if (ring_init(&ttyoring, ttyobuf, sizeof (ttyobuf)) != 1) {
80*0Sstevel@tonic-gate exit(1);
81*0Sstevel@tonic-gate }
82*0Sstevel@tonic-gate if (ring_init(&ttyiring, ttyibuf, sizeof (ttyibuf)) != 1) {
83*0Sstevel@tonic-gate exit(1);
84*0Sstevel@tonic-gate }
85*0Sstevel@tonic-gate autoflush = 1;
86*0Sstevel@tonic-gate }
87*0Sstevel@tonic-gate
88*0Sstevel@tonic-gate
89*0Sstevel@tonic-gate /*
90*0Sstevel@tonic-gate * Send as much data as possible to the terminal.
91*0Sstevel@tonic-gate *
92*0Sstevel@tonic-gate * Return value:
93*0Sstevel@tonic-gate * -2: Error occurred other than EWOULDBLOCK; see
94*0Sstevel@tonic-gate * 'errno' for specifics
95*0Sstevel@tonic-gate * -1: No useful work done, although data was waiting.
96*0Sstevel@tonic-gate * This may be due to EWOULDBLOCK error.
97*0Sstevel@tonic-gate * 0: No data was waiting, so nothing was done.
98*0Sstevel@tonic-gate * 1: All waiting data was written out.
99*0Sstevel@tonic-gate * n: Part of data was written. 'n' is the number
100*0Sstevel@tonic-gate * of bytes remaining which were not written.
101*0Sstevel@tonic-gate */
102*0Sstevel@tonic-gate
103*0Sstevel@tonic-gate int
ttyflush(drop)104*0Sstevel@tonic-gate ttyflush(drop)
105*0Sstevel@tonic-gate int drop;
106*0Sstevel@tonic-gate {
107*0Sstevel@tonic-gate register int n, n0, n1;
108*0Sstevel@tonic-gate
109*0Sstevel@tonic-gate n0 = ring_full_count(&ttyoring);
110*0Sstevel@tonic-gate if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
111*0Sstevel@tonic-gate if (drop) {
112*0Sstevel@tonic-gate TerminalFlushOutput();
113*0Sstevel@tonic-gate /* we leave 'n' alone! */
114*0Sstevel@tonic-gate } else {
115*0Sstevel@tonic-gate n = TerminalWrite((char *)ttyoring.consume, n);
116*0Sstevel@tonic-gate if (n == -1 && errno != EWOULDBLOCK)
117*0Sstevel@tonic-gate return (-2);
118*0Sstevel@tonic-gate }
119*0Sstevel@tonic-gate }
120*0Sstevel@tonic-gate if (n > 0) {
121*0Sstevel@tonic-gate if (termdata && n) {
122*0Sstevel@tonic-gate Dump('>', ttyoring.consume, n);
123*0Sstevel@tonic-gate }
124*0Sstevel@tonic-gate /*
125*0Sstevel@tonic-gate * If we wrote everything, and the full count is
126*0Sstevel@tonic-gate * larger than what we wrote, then write the
127*0Sstevel@tonic-gate * rest of the buffer.
128*0Sstevel@tonic-gate */
129*0Sstevel@tonic-gate if (n1 == n && n0 > n) {
130*0Sstevel@tonic-gate n1 = n0 - n;
131*0Sstevel@tonic-gate if (!drop) {
132*0Sstevel@tonic-gate n1 = TerminalWrite((char *)ttyoring.bottom, n1);
133*0Sstevel@tonic-gate if (n1 == -1) {
134*0Sstevel@tonic-gate if (errno != EWOULDBLOCK)
135*0Sstevel@tonic-gate return (-2);
136*0Sstevel@tonic-gate n1 = 0;
137*0Sstevel@tonic-gate }
138*0Sstevel@tonic-gate }
139*0Sstevel@tonic-gate n += n1;
140*0Sstevel@tonic-gate }
141*0Sstevel@tonic-gate ring_consumed(&ttyoring, n);
142*0Sstevel@tonic-gate }
143*0Sstevel@tonic-gate if (n < 0)
144*0Sstevel@tonic-gate return (-1);
145*0Sstevel@tonic-gate
146*0Sstevel@tonic-gate if (n == n0) {
147*0Sstevel@tonic-gate if (n0)
148*0Sstevel@tonic-gate return (-1);
149*0Sstevel@tonic-gate return (0);
150*0Sstevel@tonic-gate }
151*0Sstevel@tonic-gate return (n0 - n + 1);
152*0Sstevel@tonic-gate }
153*0Sstevel@tonic-gate
154*0Sstevel@tonic-gate
155*0Sstevel@tonic-gate /*
156*0Sstevel@tonic-gate * These routines decides on what the mode should be (based on the values
157*0Sstevel@tonic-gate * of various global variables).
158*0Sstevel@tonic-gate */
159*0Sstevel@tonic-gate
160*0Sstevel@tonic-gate
161*0Sstevel@tonic-gate int
getconnmode()162*0Sstevel@tonic-gate getconnmode()
163*0Sstevel@tonic-gate {
164*0Sstevel@tonic-gate extern int linemode;
165*0Sstevel@tonic-gate int mode = 0;
166*0Sstevel@tonic-gate #ifdef KLUDGELINEMODE
167*0Sstevel@tonic-gate extern int kludgelinemode;
168*0Sstevel@tonic-gate #endif
169*0Sstevel@tonic-gate
170*0Sstevel@tonic-gate if (my_want_state_is_dont(TELOPT_ECHO))
171*0Sstevel@tonic-gate mode |= MODE_ECHO;
172*0Sstevel@tonic-gate
173*0Sstevel@tonic-gate if (localflow)
174*0Sstevel@tonic-gate mode |= MODE_FLOW;
175*0Sstevel@tonic-gate
176*0Sstevel@tonic-gate if (my_want_state_is_will(TELOPT_BINARY))
177*0Sstevel@tonic-gate mode |= MODE_INBIN;
178*0Sstevel@tonic-gate
179*0Sstevel@tonic-gate if (my_want_state_is_do(TELOPT_BINARY))
180*0Sstevel@tonic-gate mode |= MODE_OUTBIN;
181*0Sstevel@tonic-gate
182*0Sstevel@tonic-gate #ifdef KLUDGELINEMODE
183*0Sstevel@tonic-gate if (kludgelinemode) {
184*0Sstevel@tonic-gate if (my_want_state_is_dont(TELOPT_SGA)) {
185*0Sstevel@tonic-gate mode |= (MODE_TRAPSIG|MODE_EDIT);
186*0Sstevel@tonic-gate if (dontlecho &&
187*0Sstevel@tonic-gate (clocks.echotoggle > clocks.modenegotiated)) {
188*0Sstevel@tonic-gate mode &= ~MODE_ECHO;
189*0Sstevel@tonic-gate }
190*0Sstevel@tonic-gate }
191*0Sstevel@tonic-gate return (mode);
192*0Sstevel@tonic-gate }
193*0Sstevel@tonic-gate #endif
194*0Sstevel@tonic-gate if (my_want_state_is_will(TELOPT_LINEMODE))
195*0Sstevel@tonic-gate mode |= linemode;
196*0Sstevel@tonic-gate return (mode);
197*0Sstevel@tonic-gate }
198*0Sstevel@tonic-gate
199*0Sstevel@tonic-gate void
setconnmode(force)200*0Sstevel@tonic-gate setconnmode(force)
201*0Sstevel@tonic-gate int force;
202*0Sstevel@tonic-gate {
203*0Sstevel@tonic-gate static int enc_passwd = 0;
204*0Sstevel@tonic-gate register int newmode;
205*0Sstevel@tonic-gate
206*0Sstevel@tonic-gate newmode = getconnmode()|(force?MODE_FORCE:0);
207*0Sstevel@tonic-gate
208*0Sstevel@tonic-gate TerminalNewMode(newmode);
209*0Sstevel@tonic-gate
210*0Sstevel@tonic-gate if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) {
211*0Sstevel@tonic-gate if (my_want_state_is_will(TELOPT_ENCRYPT) &&
212*0Sstevel@tonic-gate (enc_passwd == 0) && !encrypt_output) {
213*0Sstevel@tonic-gate encrypt_request_start(0, 0);
214*0Sstevel@tonic-gate enc_passwd = 1;
215*0Sstevel@tonic-gate }
216*0Sstevel@tonic-gate } else {
217*0Sstevel@tonic-gate if (enc_passwd) {
218*0Sstevel@tonic-gate encrypt_request_end();
219*0Sstevel@tonic-gate enc_passwd = 0;
220*0Sstevel@tonic-gate }
221*0Sstevel@tonic-gate }
222*0Sstevel@tonic-gate }
223*0Sstevel@tonic-gate
224*0Sstevel@tonic-gate
225*0Sstevel@tonic-gate void
setcommandmode()226*0Sstevel@tonic-gate setcommandmode()
227*0Sstevel@tonic-gate {
228*0Sstevel@tonic-gate TerminalNewMode(-1);
229*0Sstevel@tonic-gate }
230