terminal.c revision 63248
129088Smarkm/* 229088Smarkm * Copyright (c) 1988, 1990, 1993 329088Smarkm * The Regents of the University of California. All rights reserved. 429088Smarkm * 529088Smarkm * Redistribution and use in source and binary forms, with or without 629088Smarkm * modification, are permitted provided that the following conditions 729088Smarkm * are met: 829088Smarkm * 1. Redistributions of source code must retain the above copyright 929088Smarkm * notice, this list of conditions and the following disclaimer. 1029088Smarkm * 2. Redistributions in binary form must reproduce the above copyright 1129088Smarkm * notice, this list of conditions and the following disclaimer in the 1229088Smarkm * documentation and/or other materials provided with the distribution. 1329088Smarkm * 3. All advertising materials mentioning features or use of this software 1429088Smarkm * must display the following acknowledgement: 1529088Smarkm * This product includes software developed by the University of 1629088Smarkm * California, Berkeley and its contributors. 1729088Smarkm * 4. Neither the name of the University nor the names of its contributors 1829088Smarkm * may be used to endorse or promote products derived from this software 1929088Smarkm * without specific prior written permission. 2029088Smarkm * 2129088Smarkm * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2229088Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2329088Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2429088Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2529088Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2629088Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2729088Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2829088Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2929088Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3029088Smarkm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3129088Smarkm * SUCH DAMAGE. 3229088Smarkm */ 3329088Smarkm 3429088Smarkm#ifndef lint 3563248Speter#if 0 3629181Smarkmstatic const char sccsid[] = "@(#)terminal.c 8.2 (Berkeley) 2/16/95"; 3763248Speter#else 3863248Speterstatic const char rcsid[] = 3963248Speter "$FreeBSD: head/contrib/telnet/telnet/terminal.c 63248 2000-07-16 05:48:49Z peter $"; 4063248Speter#endif 4129088Smarkm#endif /* not lint */ 4229088Smarkm 4329088Smarkm#include <arpa/telnet.h> 4429088Smarkm#include <sys/types.h> 4529088Smarkm 4629088Smarkm#include "ring.h" 4729088Smarkm 4829088Smarkm#include "externs.h" 4929088Smarkm#include "types.h" 5029088Smarkm 5129181Smarkm#if defined(ENCRYPTION) 5229181Smarkm#include <libtelnet/encrypt.h> 5329181Smarkm#endif 5429181Smarkm 5529088SmarkmRing ttyoring, ttyiring; 5629088Smarkmunsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ]; 5729088Smarkm 5829088Smarkmint termdata; /* Debugging flag */ 5929088Smarkm 6029088Smarkm#ifdef USE_TERMIO 6129088Smarkm# ifndef VDISCARD 6229088Smarkmcc_t termFlushChar; 6329088Smarkm# endif 6429088Smarkm# ifndef VLNEXT 6529088Smarkmcc_t termLiteralNextChar; 6629088Smarkm# endif 6729088Smarkm# ifndef VSUSP 6829088Smarkmcc_t termSuspChar; 6929088Smarkm# endif 7029088Smarkm# ifndef VWERASE 7129088Smarkmcc_t termWerasChar; 7229088Smarkm# endif 7329088Smarkm# ifndef VREPRINT 7429088Smarkmcc_t termRprntChar; 7529088Smarkm# endif 7629088Smarkm# ifndef VSTART 7729088Smarkmcc_t termStartChar; 7829088Smarkm# endif 7929088Smarkm# ifndef VSTOP 8029088Smarkmcc_t termStopChar; 8129088Smarkm# endif 8229088Smarkm# ifndef VEOL 8329088Smarkmcc_t termForw1Char; 8429088Smarkm# endif 8529088Smarkm# ifndef VEOL2 8629088Smarkmcc_t termForw2Char; 8729088Smarkm# endif 8829088Smarkm# ifndef VSTATUS 8929088Smarkmcc_t termAytChar; 9029088Smarkm# endif 9129088Smarkm#else 9229088Smarkmcc_t termForw2Char; 9329088Smarkmcc_t termAytChar; 9429088Smarkm#endif 9529088Smarkm 9629088Smarkm/* 9729088Smarkm * initialize the terminal data structures. 9829088Smarkm */ 9929088Smarkm 10029088Smarkm void 10129088Smarkminit_terminal() 10229088Smarkm{ 10329088Smarkm if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) { 10429088Smarkm exit(1); 10529088Smarkm } 10629088Smarkm if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) { 10729088Smarkm exit(1); 10829088Smarkm } 10929088Smarkm autoflush = TerminalAutoFlush(); 11029088Smarkm} 11129088Smarkm 11229088Smarkm 11329088Smarkm/* 11429088Smarkm * Send as much data as possible to the terminal. 11529088Smarkm * 11629088Smarkm * Return value: 11729088Smarkm * -1: No useful work done, data waiting to go out. 11829088Smarkm * 0: No data was waiting, so nothing was done. 11929088Smarkm * 1: All waiting data was written out. 12029088Smarkm * n: All data - n was written out. 12129088Smarkm */ 12229088Smarkm 12329088Smarkm 12429088Smarkm int 12529088Smarkmttyflush(drop) 12629088Smarkm int drop; 12729088Smarkm{ 12829088Smarkm register int n, n0, n1; 12929088Smarkm 13029088Smarkm n0 = ring_full_count(&ttyoring); 13129088Smarkm if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) { 13229088Smarkm if (drop) { 13329088Smarkm TerminalFlushOutput(); 13429088Smarkm /* we leave 'n' alone! */ 13529088Smarkm } else { 13629088Smarkm n = TerminalWrite(ttyoring.consume, n); 13729088Smarkm } 13829088Smarkm } 13929088Smarkm if (n > 0) { 14029088Smarkm if (termdata && n) { 14129088Smarkm Dump('>', ttyoring.consume, n); 14229088Smarkm } 14329088Smarkm /* 14429088Smarkm * If we wrote everything, and the full count is 14529088Smarkm * larger than what we wrote, then write the 14629088Smarkm * rest of the buffer. 14729088Smarkm */ 14829088Smarkm if (n1 == n && n0 > n) { 14929088Smarkm n1 = n0 - n; 15029088Smarkm if (!drop) 15129088Smarkm n1 = TerminalWrite(ttyoring.bottom, n1); 15229088Smarkm if (n1 > 0) 15329088Smarkm n += n1; 15429088Smarkm } 15529088Smarkm ring_consumed(&ttyoring, n); 15629088Smarkm } 15729088Smarkm if (n < 0) 15829088Smarkm return -1; 15929088Smarkm if (n == n0) { 16029088Smarkm if (n0) 16129088Smarkm return -1; 16229088Smarkm return 0; 16329088Smarkm } 16429088Smarkm return n0 - n + 1; 16529088Smarkm} 16629088Smarkm 16729088Smarkm 16829088Smarkm/* 16929088Smarkm * These routines decides on what the mode should be (based on the values 17029088Smarkm * of various global variables). 17129088Smarkm */ 17229088Smarkm 17329088Smarkm 17429088Smarkm int 17529088Smarkmgetconnmode() 17629088Smarkm{ 17729088Smarkm extern int linemode; 17829088Smarkm int mode = 0; 17929088Smarkm#ifdef KLUDGELINEMODE 18029088Smarkm extern int kludgelinemode; 18129088Smarkm#endif 18229088Smarkm 18329088Smarkm if (In3270) 18429088Smarkm return(MODE_FLOW); 18529088Smarkm 18629088Smarkm if (my_want_state_is_dont(TELOPT_ECHO)) 18729088Smarkm mode |= MODE_ECHO; 18829088Smarkm 18929088Smarkm if (localflow) 19029088Smarkm mode |= MODE_FLOW; 19129088Smarkm 19229088Smarkm if (my_want_state_is_will(TELOPT_BINARY)) 19329088Smarkm mode |= MODE_INBIN; 19429088Smarkm 19529088Smarkm if (his_want_state_is_will(TELOPT_BINARY)) 19629088Smarkm mode |= MODE_OUTBIN; 19729088Smarkm 19829088Smarkm#ifdef KLUDGELINEMODE 19929088Smarkm if (kludgelinemode) { 20029088Smarkm if (my_want_state_is_dont(TELOPT_SGA)) { 20129088Smarkm mode |= (MODE_TRAPSIG|MODE_EDIT); 20229088Smarkm if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { 20329088Smarkm mode &= ~MODE_ECHO; 20429088Smarkm } 20529088Smarkm } 20629088Smarkm return(mode); 20729088Smarkm } 20829088Smarkm#endif 20929088Smarkm if (my_want_state_is_will(TELOPT_LINEMODE)) 21029088Smarkm mode |= linemode; 21129088Smarkm return(mode); 21229088Smarkm} 21329088Smarkm 21429088Smarkm void 21529088Smarkmsetconnmode(force) 21629088Smarkm int force; 21729088Smarkm{ 21829088Smarkm#ifdef ENCRYPTION 21929088Smarkm static int enc_passwd = 0; 22029088Smarkm#endif /* ENCRYPTION */ 22129088Smarkm register int newmode; 22229088Smarkm 22329088Smarkm newmode = getconnmode()|(force?MODE_FORCE:0); 22429088Smarkm 22529088Smarkm TerminalNewMode(newmode); 22629088Smarkm 22729088Smarkm#ifdef ENCRYPTION 22829088Smarkm if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) { 22929088Smarkm if (my_want_state_is_will(TELOPT_ENCRYPT) 23029088Smarkm && (enc_passwd == 0) && !encrypt_output) { 23129088Smarkm encrypt_request_start(0, 0); 23229088Smarkm enc_passwd = 1; 23329088Smarkm } 23429088Smarkm } else { 23529088Smarkm if (enc_passwd) { 23629088Smarkm encrypt_request_end(); 23729088Smarkm enc_passwd = 0; 23829088Smarkm } 23929088Smarkm } 24029088Smarkm#endif /* ENCRYPTION */ 24129088Smarkm 24229088Smarkm} 24329088Smarkm 24429088Smarkm 24529088Smarkm void 24629088Smarkmsetcommandmode() 24729088Smarkm{ 24829088Smarkm TerminalNewMode(-1); 24929088Smarkm} 250