1 /* 2 * Copyright (c) 1988, 1990, 1993 3 * The Regents of the University of California. 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 /* from: static char sccsid[] = "@(#)terminal.c 8.1 (Berkeley) 6/6/93"; */ 36 static char *rcsid = "$Id: terminal.c,v 1.3 1994/02/25 03:00:47 cgd Exp $"; 37 #endif /* not lint */ 38 39 #include <arpa/telnet.h> 40 #include <sys/types.h> 41 42 #include "ring.h" 43 44 #include "externs.h" 45 #include "types.h" 46 47 Ring ttyoring, ttyiring; 48 unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ]; 49 50 int termdata; /* Debugging flag */ 51 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 87 88 /* 89 * initialize the terminal data structures. 90 */ 91 92 void 93 init_terminal() 94 { 95 if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) { 96 exit(1); 97 } 98 if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) { 99 exit(1); 100 } 101 autoflush = TerminalAutoFlush(); 102 } 103 104 105 /* 106 * Send as much data as possible to the terminal. 107 * 108 * Return value: 109 * -1: No useful work done, data waiting to go out. 110 * 0: No data was waiting, so nothing was done. 111 * 1: All waiting data was written out. 112 * n: All data - n was written out. 113 */ 114 115 116 int 117 ttyflush(drop) 118 int drop; 119 { 120 register int n, n0, n1; 121 122 n0 = ring_full_count(&ttyoring); 123 if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) { 124 if (drop) { 125 TerminalFlushOutput(); 126 /* we leave 'n' alone! */ 127 } else { 128 n = TerminalWrite(ttyoring.consume, n); 129 } 130 } 131 if (n > 0) { 132 if (termdata && n) { 133 Dump('>', ttyoring.consume, n); 134 } 135 /* 136 * If we wrote everything, and the full count is 137 * larger than what we wrote, then write the 138 * rest of the buffer. 139 */ 140 if (n1 == n && n0 > n) { 141 n1 = n0 - n; 142 if (!drop) 143 n1 = TerminalWrite(ttyoring.bottom, n1); 144 n += n1; 145 } 146 ring_consumed(&ttyoring, n); 147 } 148 if (n < 0) 149 return -1; 150 if (n == n0) { 151 if (n0) 152 return -1; 153 return 0; 154 } 155 return n0 - n + 1; 156 } 157 158 159 /* 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 register int newmode; 210 211 newmode = getconnmode()|(force?MODE_FORCE:0); 212 213 TerminalNewMode(newmode); 214 215 216 } 217 218 219 void 220 setcommandmode() 221 { 222 TerminalNewMode(-1); 223 } 224