/* * Copyright (c) 1988, 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #ifdef __FBSDID __FBSDID("$FreeBSD: src/crypto/telnet/telnet/terminal.c,v 1.2.8.2 2002/04/13 10:59:08 markm Exp $"); #endif #ifndef lint static const char sccsid[] = "@(#)terminal.c 8.2 (Berkeley) 2/16/95"; #endif #include #include #include "ring.h" #include "externs.h" #include "types.h" #ifdef ENCRYPTION #include #endif Ring ttyoring, ttyiring; unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ]; int termdata; /* Debugging flag */ #ifdef USE_TERMIO # ifndef VDISCARD cc_t termFlushChar; # endif # ifndef VLNEXT cc_t termLiteralNextChar; # endif # ifndef VSUSP cc_t termSuspChar; # endif # ifndef VWERASE cc_t termWerasChar; # endif # ifndef VREPRINT cc_t termRprntChar; # endif # ifndef VSTART cc_t termStartChar; # endif # ifndef VSTOP cc_t termStopChar; # endif # ifndef VEOL cc_t termForw1Char; # endif # ifndef VEOL2 cc_t termForw2Char; # endif # ifndef VSTATUS cc_t termAytChar; # endif #else cc_t termForw2Char; cc_t termAytChar; #endif /* * initialize the terminal data structures. */ void init_terminal(void) { if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) { exit(1); } if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) { exit(1); } autoflush = TerminalAutoFlush(); } /* * Send as much data as possible to the terminal. * * Return value: * -1: No useful work done, data waiting to go out. * 0: No data was waiting, so nothing was done. * 1: All waiting data was written out. * n: All data - n was written out. */ int ttyflush(int drop) { int n, n0, n1; n0 = ring_full_count(&ttyoring); if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) { if (drop) { TerminalFlushOutput(); /* we leave 'n' alone! */ } else { n = TerminalWrite(ttyoring.consume, n); } } if (n > 0) { if (termdata && n) { Dump('>', ttyoring.consume, n); } /* * If we wrote everything, and the full count is * larger than what we wrote, then write the * rest of the buffer. */ if (n1 == n && n0 > n) { n1 = n0 - n; if (!drop) n1 = TerminalWrite(ttyoring.bottom, n1); if (n1 > 0) n += n1; } ring_consumed(&ttyoring, n); } if (n < 0) return -1; if (n == n0) { if (n0) return -1; return 0; } return n0 - n + 1; } /* * These routines decides on what the mode should be (based on the values * of various global variables). */ int getconnmode(void) { extern int linemode; int mode = 0; #ifdef KLUDGELINEMODE extern int kludgelinemode; #endif if (my_want_state_is_dont(TELOPT_ECHO)) mode |= MODE_ECHO; if (localflow) mode |= MODE_FLOW; if (my_want_state_is_will(TELOPT_BINARY)) mode |= MODE_INBIN; if (his_want_state_is_will(TELOPT_BINARY)) mode |= MODE_OUTBIN; #ifdef KLUDGELINEMODE if (kludgelinemode) { if (my_want_state_is_dont(TELOPT_SGA)) { mode |= (MODE_TRAPSIG|MODE_EDIT); if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { mode &= ~MODE_ECHO; } } return(mode); } #endif if (my_want_state_is_will(TELOPT_LINEMODE)) mode |= linemode; return(mode); } void setconnmode(int force) { #ifdef ENCRYPTION static int enc_passwd = 0; #endif /* ENCRYPTION */ int newmode; newmode = getconnmode()|(force?MODE_FORCE:0); TerminalNewMode(newmode); #ifdef ENCRYPTION if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) { if (my_want_state_is_will(TELOPT_ENCRYPT) && (enc_passwd == 0) && !encrypt_output) { encrypt_request_start(0, 0); enc_passwd = 1; } } else { if (enc_passwd) { encrypt_request_end(); enc_passwd = 0; } } #endif /* ENCRYPTION */ } void setcommandmode(void) { TerminalNewMode(-1); }