diff options
Diffstat (limited to 'remote_cmds/telnet.tproj/terminal.c')
| -rw-r--r-- | remote_cmds/telnet.tproj/terminal.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/remote_cmds/telnet.tproj/terminal.c b/remote_cmds/telnet.tproj/terminal.c new file mode 100644 index 0000000..96edc35 --- /dev/null +++ b/remote_cmds/telnet.tproj/terminal.c @@ -0,0 +1,242 @@ +/* + * 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. + */ + +#if 0 +#ifndef lint +static const char sccsid[] = "@(#)terminal.c 8.2 (Berkeley) 2/16/95"; +#endif +#endif +#include <sys/cdefs.h> +__FBSDID("$FreeBSD: src/contrib/telnet/telnet/terminal.c,v 1.7 2003/05/04 02:54:48 obrien Exp $"); + +#include <arpa/telnet.h> +#include <sys/types.h> + +#include <stdlib.h> + +#include "ring.h" + +#include "externs.h" +#include "types.h" + +#ifdef ENCRYPTION +#include <libtelnet/encrypt.h> +#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((char *)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((char *)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); +} |