1 /* $OpenBSD: terminal.c,v 1.6 2003/06/03 02:56:18 millert Exp $ */ 2 /* $NetBSD: terminal.c,v 1.5 1996/02/28 21:04:17 thorpej Exp $ */ 3 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. Neither the name of the University nor the names of its contributors 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 33 #include "telnet_locl.h" 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 { 108 int n, n0, n1; 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 { 116 n = TerminalWrite((char *)ttyoring.consume, n); 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); 132 if (n1 > 0) 133 n += n1; 134 } 135 ring_consumed(&ttyoring, n); 136 } 137 if (n < 0) { 138 if (errno == EPIPE) 139 kill(0, SIGQUIT); 140 return -1; 141 } 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; 174 175 if ((eight & 1) || my_want_state_is_will(TELOPT_BINARY)) 176 mode |= MODE_INBIN; 177 178 if (eight & 2) 179 mode |= MODE_OUT8; 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 { 203 int newmode; 204 #ifdef ENCRYPTION 205 static int enc_passwd = 0; 206 #endif 207 208 newmode = getconnmode()|(force?MODE_FORCE:0); 209 210 TerminalNewMode(newmode); 211 212 #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 226 227 } 228 229 230 void 231 setcommandmode() 232 { 233 TerminalNewMode(-1); 234 } 235