Annotation of src/usr.bin/telnet/terminal.c, Revision 1.6
1.6 ! millert 1: /* $OpenBSD: terminal.c,v 1.5 2002/12/07 20:41:21 millert Exp $ */
1.2 niklas 2: /* $NetBSD: terminal.c,v 1.5 1996/02/28 21:04:17 thorpej Exp $ */
3:
1.1 deraadt 4: /*
5: * Copyright (c) 1988, 1990, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.6 ! millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
1.3 art 33: #include "telnet_locl.h"
1.1 deraadt 34:
35: Ring ttyoring, ttyiring;
36: unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ];
37:
38: int termdata; /* Debugging flag */
39:
40: #ifdef USE_TERMIO
41: # ifndef VDISCARD
42: cc_t termFlushChar;
43: # endif
44: # ifndef VLNEXT
45: cc_t termLiteralNextChar;
46: # endif
47: # ifndef VSUSP
48: cc_t termSuspChar;
49: # endif
50: # ifndef VWERASE
51: cc_t termWerasChar;
52: # endif
53: # ifndef VREPRINT
54: cc_t termRprntChar;
55: # endif
56: # ifndef VSTART
57: cc_t termStartChar;
58: # endif
59: # ifndef VSTOP
60: cc_t termStopChar;
61: # endif
62: # ifndef VEOL
63: cc_t termForw1Char;
64: # endif
65: # ifndef VEOL2
66: cc_t termForw2Char;
67: # endif
68: # ifndef VSTATUS
69: cc_t termAytChar;
70: # endif
71: #else
72: cc_t termForw2Char;
73: cc_t termAytChar;
74: #endif
75:
76: /*
77: * initialize the terminal data structures.
78: */
79:
80: void
81: init_terminal()
82: {
83: if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) {
84: exit(1);
85: }
86: if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) {
87: exit(1);
88: }
89: autoflush = TerminalAutoFlush();
90: }
91:
92:
93: /*
94: * Send as much data as possible to the terminal.
95: *
96: * Return value:
97: * -1: No useful work done, data waiting to go out.
98: * 0: No data was waiting, so nothing was done.
99: * 1: All waiting data was written out.
100: * n: All data - n was written out.
101: */
102:
103:
104: int
105: ttyflush(drop)
106: int drop;
107: {
1.4 mpech 108: int n, n0, n1;
1.1 deraadt 109:
110: n0 = ring_full_count(&ttyoring);
111: if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
112: if (drop) {
113: TerminalFlushOutput();
114: /* we leave 'n' alone! */
115: } else {
1.3 art 116: n = TerminalWrite((char *)ttyoring.consume, n);
1.1 deraadt 117: }
118: }
119: if (n > 0) {
120: if (termdata && n) {
121: Dump('>', ttyoring.consume, n);
122: }
123: /*
124: * If we wrote everything, and the full count is
125: * larger than what we wrote, then write the
126: * rest of the buffer.
127: */
128: if (n1 == n && n0 > n) {
129: n1 = n0 - n;
130: if (!drop)
131: n1 = TerminalWrite(ttyoring.bottom, n1);
1.2 niklas 132: if (n1 > 0)
133: n += n1;
1.1 deraadt 134: }
135: ring_consumed(&ttyoring, n);
136: }
1.5 millert 137: if (n < 0) {
138: if (errno == EPIPE)
139: kill(0, SIGQUIT);
1.1 deraadt 140: return -1;
1.5 millert 141: }
1.1 deraadt 142: if (n == n0) {
143: if (n0)
144: return -1;
145: return 0;
146: }
147: return n0 - n + 1;
148: }
149:
150:
151: /*
152: * These routines decides on what the mode should be (based on the values
153: * of various global variables).
154: */
155:
156:
157: int
158: getconnmode()
159: {
160: extern int linemode;
161: int mode = 0;
162: #ifdef KLUDGELINEMODE
163: extern int kludgelinemode;
164: #endif
165:
166: if (In3270)
167: return(MODE_FLOW);
168:
169: if (my_want_state_is_dont(TELOPT_ECHO))
170: mode |= MODE_ECHO;
171:
172: if (localflow)
173: mode |= MODE_FLOW;
174:
1.3 art 175: if ((eight & 1) || my_want_state_is_will(TELOPT_BINARY))
1.1 deraadt 176: mode |= MODE_INBIN;
177:
1.3 art 178: if (eight & 2)
179: mode |= MODE_OUT8;
1.1 deraadt 180: if (his_want_state_is_will(TELOPT_BINARY))
181: mode |= MODE_OUTBIN;
182:
183: #ifdef KLUDGELINEMODE
184: if (kludgelinemode) {
185: if (my_want_state_is_dont(TELOPT_SGA)) {
186: mode |= (MODE_TRAPSIG|MODE_EDIT);
187: if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) {
188: mode &= ~MODE_ECHO;
189: }
190: }
191: return(mode);
192: }
193: #endif
194: if (my_want_state_is_will(TELOPT_LINEMODE))
195: mode |= linemode;
196: return(mode);
197: }
198:
199: void
200: setconnmode(force)
201: int force;
202: {
1.4 mpech 203: int newmode;
1.3 art 204: #ifdef ENCRYPTION
205: static int enc_passwd = 0;
206: #endif
1.1 deraadt 207:
208: newmode = getconnmode()|(force?MODE_FORCE:0);
209:
210: TerminalNewMode(newmode);
211:
1.3 art 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;
218: }
219: } else {
220: if (enc_passwd) {
221: encrypt_request_end();
222: enc_passwd = 0;
223: }
224: }
225: #endif
1.1 deraadt 226:
227: }
228:
229:
230: void
231: setcommandmode()
232: {
233: TerminalNewMode(-1);
234: }
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