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#include "telnet_locl.h" 35 36RCSID("$Id$"); 37 38Ring ttyoring, ttyiring; 39unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ]; 40 41int termdata; /* Debugging flag */ 42 43# ifndef VDISCARD 44cc_t termFlushChar; 45# endif 46# ifndef VLNEXT 47cc_t termLiteralNextChar; 48# endif 49# ifndef VSUSP 50cc_t termSuspChar; 51# endif 52# ifndef VWERASE 53cc_t termWerasChar; 54# endif 55# ifndef VREPRINT 56cc_t termRprntChar; 57# endif 58# ifndef VSTART 59cc_t termStartChar; 60# endif 61# ifndef VSTOP 62cc_t termStopChar; 63# endif 64# ifndef VEOL 65cc_t termForw1Char; 66# endif 67# ifndef VEOL2 68cc_t termForw2Char; 69# endif 70# ifndef VSTATUS 71cc_t termAytChar; 72# endif 73 74/* 75 * initialize the terminal data structures. 76 */ 77 78void 79init_terminal(void) 80{ 81 if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) { 82 exit(1); 83 } 84 if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) { 85 exit(1); 86 } 87 autoflush = TerminalAutoFlush(); 88} 89 90 91/* 92 * Send as much data as possible to the terminal. 93 * 94 * Return value: 95 * -1: No useful work done, data waiting to go out. 96 * 0: No data was waiting, so nothing was done. 97 * 1: All waiting data was written out. 98 * n: All data - n was written out. 99 */ 100 101 102int 103ttyflush(int drop) 104{ 105 int n, n0, n1; 106 107 n0 = ring_full_count(&ttyoring); 108 if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) { 109 if (drop) { 110 TerminalFlushOutput(); 111 /* we leave 'n' alone! */ 112 } else { 113 n = TerminalWrite((char *)ttyoring.consume, n); 114 } 115 } 116 if (n > 0) { 117 if (termdata && n) { 118 Dump('>', ttyoring.consume, n); 119 } 120 /* 121 * If we wrote everything, and the full count is 122 * larger than what we wrote, then write the 123 * rest of the buffer. 124 */ 125 if (n1 == n && n0 > n) { 126 n1 = n0 - n; 127 if (!drop) 128 n1 = TerminalWrite((char *)ttyoring.bottom, n1); 129 if (n1 > 0) 130 n += n1; 131 } 132 ring_consumed(&ttyoring, n); 133 } 134 if (n < 0) 135 return -1; 136 if (n == n0) { 137 if (n0) 138 return -1; 139 return 0; 140 } 141 return n0 - n + 1; 142} 143 144 145/* 146 * These routines decides on what the mode should be (based on the values 147 * of various global variables). 148 */ 149 150 151int 152getconnmode(void) 153{ 154 int mode = 0; 155 156 if (my_want_state_is_dont(TELOPT_ECHO)) 157 mode |= MODE_ECHO; 158 159 if (localflow) 160 mode |= MODE_FLOW; 161 162 if ((eight & 1) || my_want_state_is_will(TELOPT_BINARY)) 163 mode |= MODE_INBIN; 164 165 if (eight & 2) 166 mode |= MODE_OUT8; 167 if (his_want_state_is_will(TELOPT_BINARY)) 168 mode |= MODE_OUTBIN; 169 170#ifdef KLUDGELINEMODE 171 if (kludgelinemode) { 172 if (my_want_state_is_dont(TELOPT_SGA)) { 173 mode |= (MODE_TRAPSIG|MODE_EDIT); 174 if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { 175 mode &= ~MODE_ECHO; 176 } 177 } 178 return(mode); 179 } 180#endif 181 if (my_want_state_is_will(TELOPT_LINEMODE)) 182 mode |= linemode; 183 return(mode); 184} 185 186 void 187setconnmode(force) 188 int force; 189{ 190#ifdef ENCRYPTION 191 static int enc_passwd = 0; 192#endif 193 int newmode; 194 195 newmode = getconnmode()|(force?MODE_FORCE:0); 196 197 TerminalNewMode(newmode); 198 199#ifdef ENCRYPTION 200 if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) { 201 if (my_want_state_is_will(TELOPT_ENCRYPT) 202 && (enc_passwd == 0) && !encrypt_output) { 203 encrypt_request_start(0, 0); 204 enc_passwd = 1; 205 } 206 } else { 207 if (enc_passwd) { 208 encrypt_request_end(); 209 enc_passwd = 0; 210 } 211 } 212#endif 213 214} 215 216 217 void 218setcommandmode() 219{ 220 TerminalNewMode(-1); 221} 222