Annotation of src/usr.bin/telnet/terminal.c, Revision 1.3
1.3 ! art 1: /* $OpenBSD: terminal.c,v 1.2 1996/03/27 19:33:11 niklas 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.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
1.3 ! art 37: #include "telnet_locl.h"
1.1 deraadt 38:
39: Ring ttyoring, ttyiring;
40: unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ];
41:
42: int termdata; /* Debugging flag */
43:
44: #ifdef USE_TERMIO
45: # ifndef VDISCARD
46: cc_t termFlushChar;
47: # endif
48: # ifndef VLNEXT
49: cc_t termLiteralNextChar;
50: # endif
51: # ifndef VSUSP
52: cc_t termSuspChar;
53: # endif
54: # ifndef VWERASE
55: cc_t termWerasChar;
56: # endif
57: # ifndef VREPRINT
58: cc_t termRprntChar;
59: # endif
60: # ifndef VSTART
61: cc_t termStartChar;
62: # endif
63: # ifndef VSTOP
64: cc_t termStopChar;
65: # endif
66: # ifndef VEOL
67: cc_t termForw1Char;
68: # endif
69: # ifndef VEOL2
70: cc_t termForw2Char;
71: # endif
72: # ifndef VSTATUS
73: cc_t termAytChar;
74: # endif
75: #else
76: cc_t termForw2Char;
77: cc_t termAytChar;
78: #endif
79:
80: /*
81: * initialize the terminal data structures.
82: */
83:
84: void
85: init_terminal()
86: {
87: if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) {
88: exit(1);
89: }
90: if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) {
91: exit(1);
92: }
93: autoflush = TerminalAutoFlush();
94: }
95:
96:
97: /*
98: * Send as much data as possible to the terminal.
99: *
100: * Return value:
101: * -1: No useful work done, data waiting to go out.
102: * 0: No data was waiting, so nothing was done.
103: * 1: All waiting data was written out.
104: * n: All data - n was written out.
105: */
106:
107:
108: int
109: ttyflush(drop)
110: int drop;
111: {
112: register int n, n0, n1;
113:
114: n0 = ring_full_count(&ttyoring);
115: if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
116: if (drop) {
117: TerminalFlushOutput();
118: /* we leave 'n' alone! */
119: } else {
1.3 ! art 120: n = TerminalWrite((char *)ttyoring.consume, n);
1.1 deraadt 121: }
122: }
123: if (n > 0) {
124: if (termdata && n) {
125: Dump('>', ttyoring.consume, n);
126: }
127: /*
128: * If we wrote everything, and the full count is
129: * larger than what we wrote, then write the
130: * rest of the buffer.
131: */
132: if (n1 == n && n0 > n) {
133: n1 = n0 - n;
134: if (!drop)
135: n1 = TerminalWrite(ttyoring.bottom, n1);
1.2 niklas 136: if (n1 > 0)
137: n += n1;
1.1 deraadt 138: }
139: ring_consumed(&ttyoring, n);
140: }
141: if (n < 0)
142: return -1;
143: if (n == n0) {
144: if (n0)
145: return -1;
146: return 0;
147: }
148: return n0 - n + 1;
149: }
150:
151:
152: /*
153: * These routines decides on what the mode should be (based on the values
154: * of various global variables).
155: */
156:
157:
158: int
159: getconnmode()
160: {
161: extern int linemode;
162: int mode = 0;
163: #ifdef KLUDGELINEMODE
164: extern int kludgelinemode;
165: #endif
166:
167: if (In3270)
168: return(MODE_FLOW);
169:
170: if (my_want_state_is_dont(TELOPT_ECHO))
171: mode |= MODE_ECHO;
172:
173: if (localflow)
174: mode |= MODE_FLOW;
175:
1.3 ! art 176: if ((eight & 1) || my_want_state_is_will(TELOPT_BINARY))
1.1 deraadt 177: mode |= MODE_INBIN;
178:
1.3 ! art 179: if (eight & 2)
! 180: mode |= MODE_OUT8;
1.1 deraadt 181: if (his_want_state_is_will(TELOPT_BINARY))
182: mode |= MODE_OUTBIN;
183:
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;
190: }
191: }
192: return(mode);
193: }
194: #endif
195: if (my_want_state_is_will(TELOPT_LINEMODE))
196: mode |= linemode;
197: return(mode);
198: }
199:
200: void
201: setconnmode(force)
202: int force;
203: {
204: register int newmode;
1.3 ! art 205: #ifdef ENCRYPTION
! 206: static int enc_passwd = 0;
! 207: #endif
1.1 deraadt 208:
209: newmode = getconnmode()|(force?MODE_FORCE:0);
210:
211: TerminalNewMode(newmode);
212:
1.3 ! art 213: #ifdef ENCRYPTION
! 214: if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) {
! 215: if (my_want_state_is_will(TELOPT_ENCRYPT)
! 216: && (enc_passwd == 0) && !encrypt_output) {
! 217: encrypt_request_start(0, 0);
! 218: enc_passwd = 1;
! 219: }
! 220: } else {
! 221: if (enc_passwd) {
! 222: encrypt_request_end();
! 223: enc_passwd = 0;
! 224: }
! 225: }
! 226: #endif
1.1 deraadt 227:
228: }
229:
230:
231: void
232: setcommandmode()
233: {
234: TerminalNewMode(-1);
235: }
![[BACK]](/icons/back.gif){kind=icon}
Return to terminal.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / telnet