freebsd-dev/usr.bin/telnet/terminal.c
Mark Murray 012b940383 Code merge and diff reduction between this and crypto telnet.
Also remove useless AUTHENTICATION code. We have never compiled this
here, and it is doubtful that it even works without crypto.
2001-08-20 12:21:31 +00:00

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/*
* 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.
*/
#ifndef lint
#if 0
static const char sccsid[] = "@(#)terminal.c 8.2 (Berkeley) 2/16/95";
#else
static const char rcsid[] =
"$FreeBSD$";
#endif
#endif /* not lint */
#include <arpa/telnet.h>
#include <sys/types.h>
#include "ring.h"
#include "externs.h"
#include "types.h"
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()
{
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(drop)
int drop;
{
register 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()
{
extern int linemode;
int mode = 0;
#ifdef KLUDGELINEMODE
extern int kludgelinemode;
#endif
if (In3270)
return(MODE_FLOW);
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(force)
int force;
{
register int newmode;
newmode = getconnmode()|(force?MODE_FORCE:0);
TerminalNewMode(newmode);
}
void
setcommandmode()
{
TerminalNewMode(-1);
}