395 lines
8.7 KiB
C
395 lines
8.7 KiB
C
/* $NetBSD: tn3270.c,v 1.21 2003/08/07 11:16:12 agc Exp $ */
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/*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)tn3270.c 8.2 (Berkeley) 5/30/95";
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#else
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__RCSID("$NetBSD: tn3270.c,v 1.21 2003/08/07 11:16:12 agc Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/time.h>
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#include <arpa/telnet.h>
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#include <unistd.h>
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#include <poll.h>
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#include "general.h"
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#include "defines.h"
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#include "ring.h"
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#include "externs.h"
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#ifdef TN3270
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#include "../ctlr/screen.h"
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#include "../ctlr/declare.h"
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#include "../ascii/state.h"
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#include "../general/globals.h"
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#include "../sys_curses/telextrn.h"
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int
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HaveInput, /* There is input available to scan */
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cursesdata, /* Do we dump curses data? */
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sigiocount; /* Number of times we got a SIGIO */
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char tline[200];
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char *transcom = 0; /* transparent mode command (default: none) */
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char Ibuf[8*BUFSIZ], *Ifrontp, *Ibackp;
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static char sb_terminal[] = { IAC, SB,
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TELOPT_TTYPE, TELQUAL_IS,
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'I', 'B', 'M', '-', '3', '2', '7', '8', '-', '2',
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IAC, SE };
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#define SBTERMMODEL 13
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static int
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Sent3270TerminalType; /* Have we said we are a 3270? */
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#endif /* defined(TN3270) */
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#ifdef TN3270
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void
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init_3270(void)
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{
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HaveInput = 0;
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sigiocount = 0;
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Sent3270TerminalType = 0;
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Ifrontp = Ibackp = Ibuf;
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init_ctlr(); /* Initialize some things */
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init_keyboard();
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init_screen();
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init_system();
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}
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#endif /* defined(TN3270) */
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#ifdef TN3270
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/*
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* DataToNetwork - queue up some data to go to network. If "done" is set,
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* then when last byte is queued, we add on an IAC EOR sequence (so,
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* don't call us with "done" until you want that done...)
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*
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* We actually do send all the data to the network buffer, since our
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* only client needs for us to do that.
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*/
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int
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DataToNetwork(char *buffer, /* where the data is */
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int count, /* how much to send */
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int done) /* is this the last of a logical block */
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{
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int loop, c;
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int origCount;
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origCount = count;
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while (count) {
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/* If not enough room for EORs, IACs, etc., wait */
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if (NETROOM() < 6) {
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struct pollfd set[1];
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set[0].fd = net;
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set[0].events = POLLOUT;
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netflush();
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while (NETROOM() < 6) {
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(void) poll(set, 1, INFTIM);
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netflush();
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}
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}
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c = ring_empty_count(&netoring);
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if (c > count) {
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c = count;
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}
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loop = c;
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while (loop) {
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if (((unsigned char)*buffer) == IAC) {
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break;
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}
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buffer++;
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loop--;
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}
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if ((c = c-loop)) {
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ring_supply_data(&netoring, buffer-c, c);
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count -= c;
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}
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if (loop) {
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NET2ADD(IAC, IAC);
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count--;
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buffer++;
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}
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}
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if (done) {
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NET2ADD(IAC, EOR);
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netflush(); /* try to move along as quickly as ... */
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}
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return(origCount - count);
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}
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void
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inputAvailable(int signo)
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{
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HaveInput = 1;
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sigiocount++;
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}
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void
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outputPurge(void)
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{
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(void) ttyflush(1);
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}
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/*
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* The following routines are places where the various tn3270
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* routines make calls into telnet.c.
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*/
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/*
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* DataToTerminal - queue up some data to go to terminal.
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*
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* Note: there are people who call us and depend on our processing
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* *all* the data at one time (thus the select).
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*/
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int
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DataToTerminal(
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char *buffer, /* where the data is */
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int count) /* how much to send */
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{
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int c;
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int origCount;
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origCount = count;
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while (count) {
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if (TTYROOM() == 0) {
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struct pollfd set[1];
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set[0].fd = tout;
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set[0].events = POLLOUT;
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(void) ttyflush(0);
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while (TTYROOM() == 0) {
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(void) poll(set, 1, INFTIM);
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(void) ttyflush(0);
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}
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}
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c = TTYROOM();
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if (c > count) {
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c = count;
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}
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ring_supply_data(&ttyoring, buffer, c);
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count -= c;
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buffer += c;
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}
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return(origCount);
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}
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/*
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* Push3270 - Try to send data along the 3270 output (to screen) direction.
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*/
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int
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Push3270(void)
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{
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int save = ring_full_count(&netiring);
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if (save) {
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if (Ifrontp+save > Ibuf+sizeof Ibuf) {
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if (Ibackp != Ibuf) {
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memmove(Ibuf, Ibackp, Ifrontp-Ibackp);
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Ifrontp -= (Ibackp-Ibuf);
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Ibackp = Ibuf;
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}
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}
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if (Ifrontp+save < Ibuf+sizeof Ibuf) {
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(void)telrcv();
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}
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}
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return save != ring_full_count(&netiring);
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}
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/*
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* Finish3270 - get the last dregs of 3270 data out to the terminal
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* before quitting.
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*/
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void
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Finish3270(void)
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{
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while (Push3270() || !DoTerminalOutput()) {
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HaveInput = 0;
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;
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}
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}
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/* StringToTerminal - output a null terminated string to the terminal */
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void
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StringToTerminal(char *s)
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{
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int count;
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count = strlen(s);
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if (count) {
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(void) DataToTerminal(s, count); /* we know it always goes... */
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}
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}
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/* _putchar - output a single character to the terminal. This name is so that
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* curses(3x) can call us to send out data.
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*/
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int
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_putchar(int cc)
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{
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char c = (char)cc;
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if (cursesdata) {
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Dump('>', &c, 1);
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}
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if (!TTYROOM()) {
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(void) DataToTerminal(&c, 1);
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} else {
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TTYADD(c);
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}
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return (0);
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}
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void
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SetIn3270(void)
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{
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if (Sent3270TerminalType && my_want_state_is_will(TELOPT_BINARY)
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&& my_want_state_is_do(TELOPT_BINARY) && !donebinarytoggle) {
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if (!In3270) {
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In3270 = 1;
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Init3270(); /* Initialize 3270 functions */
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/* initialize terminal key mapping */
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InitTerminal(); /* Start terminal going */
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setconnmode(0);
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}
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} else {
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if (In3270) {
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StopScreen(1);
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In3270 = 0;
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Stop3270(); /* Tell 3270 we aren't here anymore */
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setconnmode(0);
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}
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}
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}
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/*
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* tn3270_ttype()
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*
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* Send a response to a terminal type negotiation.
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*
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* Return '0' if no more responses to send; '1' if a response sent.
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*/
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int
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tn3270_ttype(void)
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{
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/*
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* Try to send a 3270 type terminal name. Decide which one based
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* on the format of our screen, and (in the future) color
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* capaiblities.
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*/
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InitTerminal(); /* Sets MaxNumberColumns, MaxNumberLines */
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if ((MaxNumberLines >= 24) && (MaxNumberColumns >= 80)) {
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Sent3270TerminalType = 1;
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if ((MaxNumberLines >= 27) && (MaxNumberColumns >= 132)) {
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MaxNumberLines = 27;
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MaxNumberColumns = 132;
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sb_terminal[SBTERMMODEL] = '5';
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} else if (MaxNumberLines >= 43) {
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MaxNumberLines = 43;
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MaxNumberColumns = 80;
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sb_terminal[SBTERMMODEL] = '4';
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} else if (MaxNumberLines >= 32) {
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MaxNumberLines = 32;
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MaxNumberColumns = 80;
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sb_terminal[SBTERMMODEL] = '3';
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} else {
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MaxNumberLines = 24;
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MaxNumberColumns = 80;
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sb_terminal[SBTERMMODEL] = '2';
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}
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NumberLines = 24; /* before we start out... */
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NumberColumns = 80;
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ScreenSize = NumberLines*NumberColumns;
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if ((MaxNumberLines*MaxNumberColumns) > MAXSCREENSIZE) {
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ExitString("Programming error: MAXSCREENSIZE too small.\n",
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1);
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/*NOTREACHED*/
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}
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printsub('>', sb_terminal+2, sizeof sb_terminal-2);
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ring_supply_data(&netoring, sb_terminal, sizeof sb_terminal);
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return 1;
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} else {
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return 0;
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}
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}
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int
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settranscom(int argc, char *argv[])
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{
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int i;
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if (argc == 1 && transcom) {
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transcom = 0;
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}
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if (argc == 1) {
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return 1;
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}
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transcom = tline;
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(void) strlcpy(tline, argv[1], sizeof(tline));
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for (i = 2; i < argc; ++i) {
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(void) strlcat(tline, " ", sizeof(tline));
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(void) strlcat(tline, argv[i], sizeof(tline));
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}
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return 1;
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}
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#endif /* defined(TN3270) */
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