terminal.c revision 1.1
1 /* 2 * Copyright (c) 1988, 1990 Regents of the University of California. 3 * All rights reserved. 4 * 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. 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. 20 * 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) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 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 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char sccsid[] = "@(#)terminal.c 5.3 (Berkeley) 3/22/91"; 36 #endif /* not lint */ 37 38 #include <arpa/telnet.h> 39 #include <sys/types.h> 40 41 #include "ring.h" 42 43 #include "externs.h" 44 #include "types.h" 45 46 Ring ttyoring, ttyiring; 47 unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ]; 48 49 int termdata; /* Debugging flag */ 50 51 #ifdef USE_TERMIO 52 # ifndef VDISCARD 53 cc_t termFlushChar; 54 # endif 55 # ifndef VLNEXT 56 cc_t termLiteralNextChar; 57 # endif 58 # ifndef VSUSP 59 cc_t termSuspChar; 60 # endif 61 # ifndef VWERASE 62 cc_t termWerasChar; 63 # endif 64 # ifndef VREPRINT 65 cc_t termRprntChar; 66 # endif 67 # ifndef VSTART 68 cc_t termStartChar; 69 # endif 70 # ifndef VSTOP 71 cc_t termStopChar; 72 # endif 73 # ifndef VEOL 74 cc_t termForw1Char; 75 # endif 76 # ifndef VEOL2 77 cc_t termForw2Char; 78 # endif 79 # ifndef VSTATUS 80 cc_t termAytChar; 81 # endif 82 #else 83 cc_t termForw2Char; 84 cc_t termAytChar; 85 #endif 86 87 /* 88 * initialize the terminal data structures. 89 */ 90 91 void 92 init_terminal() 93 { 94 if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) { 95 exit(1); 96 } 97 if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) { 98 exit(1); 99 } 100 autoflush = TerminalAutoFlush(); 101 } 102 103 104 /* 105 * Send as much data as possible to the terminal. 106 * 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. 112 */ 113 114 115 int 116 ttyflush(drop) 117 int drop; 118 { 119 register int n, n0, n1; 120 121 n0 = ring_full_count(&ttyoring); 122 if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) { 123 if (drop) { 124 TerminalFlushOutput(); 125 /* we leave 'n' alone! */ 126 } else { 127 n = TerminalWrite(ttyoring.consume, n); 128 } 129 } 130 if (n > 0) { 131 if (termdata && n) { 132 Dump('>', ttyoring.consume, n); 133 } 134 /* 135 * If we wrote everything, and the full count is 136 * larger than what we wrote, then write the 137 * rest of the buffer. 138 */ 139 if (n1 == n && n0 > n) { 140 n1 = n0 - n; 141 if (!drop) 142 n1 = TerminalWrite(ttyoring.bottom, n1); 143 n += n1; 144 } 145 ring_consumed(&ttyoring, n); 146 } 147 if (n < 0) 148 return -1; 149 if (n == n0) { 150 if (n0) 151 return -1; 152 return 0; 153 } 154 return n0 - n + 1; 155 } 156 157 158 /* 160 * These routines decides on what the mode should be (based on the values 161 * of various global variables). 162 */ 163 164 165 int 166 getconnmode() 167 { 168 extern int linemode; 169 int mode = 0; 170 #ifdef KLUDGELINEMODE 171 extern int kludgelinemode; 172 #endif 173 174 if (In3270) 175 return(MODE_FLOW); 176 177 if (my_want_state_is_dont(TELOPT_ECHO)) 178 mode |= MODE_ECHO; 179 180 if (localflow) 181 mode |= MODE_FLOW; 182 183 if (my_want_state_is_will(TELOPT_BINARY)) 184 mode |= MODE_INBIN; 185 186 if (his_want_state_is_will(TELOPT_BINARY)) 187 mode |= MODE_OUTBIN; 188 189 #ifdef KLUDGELINEMODE 190 if (kludgelinemode) { 191 if (my_want_state_is_dont(TELOPT_SGA)) { 192 mode |= (MODE_TRAPSIG|MODE_EDIT); 193 if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { 194 mode &= ~MODE_ECHO; 195 } 196 } 197 return(mode); 198 } 199 #endif 200 if (my_want_state_is_will(TELOPT_LINEMODE)) 201 mode |= linemode; 202 return(mode); 203 } 204 205 void 206 setconnmode(force) 207 int force; 208 { 209 #ifdef ENCRYPT 210 static int enc_passwd = 0; 211 #endif 212 register int newmode; 213 214 newmode = getconnmode()|(force?MODE_FORCE:0); 215 216 TerminalNewMode(newmode); 217 218 #ifdef ENCRYPT 219 if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) { 220 if (my_want_state_is_will(TELOPT_ENCRYPT) 221 && (enc_passwd == 0) && !encrypt_output) { 222 encrypt_request_start(0, 0); 223 enc_passwd = 1; 224 } 225 } else { 226 if (enc_passwd) { 227 encrypt_request_end(); 228 enc_passwd = 0; 229 } 230 } 231 #endif 232 233 } 234 235 236 void 237 setcommandmode() 238 { 239 TerminalNewMode(-1); 240 } 241
Indexes created Mon Sep 22 13:09:51 GMT 2025