appl/telnet/telnetd/termstat.c

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "telnetd.h"
  35
  36 RCSID("$Id$");
  37
  38 /*
  39  * local variables
  40  */
  41 int def_tspeed = -1, def_rspeed = -1;
  42 #ifdef  TIOCSWINSZ
  43 int def_row = 0, def_col = 0;
  44 #endif
  45
  46 /*
  47  * flowstat
  48  *
  49  * Check for changes to flow control
  50  */
  51 void
  52 flowstat()
  53 {
  54     if (his_state_is_will(TELOPT_LFLOW)) {
  55         if (tty_flowmode() != flowmode) {
  56             flowmode = tty_flowmode();
  57             output_data("%c%c%c%c%c%c",
  58                         IAC, SB, TELOPT_LFLOW,
  59                         flowmode ? LFLOW_ON : LFLOW_OFF,
  60                         IAC, SE);
  61         }
  62         if (tty_restartany() != restartany) {
  63             restartany = tty_restartany();
  64             output_data("%c%c%c%c%c%c",
  65                         IAC, SB, TELOPT_LFLOW,
  66                         restartany ? LFLOW_RESTART_ANY
  67                         : LFLOW_RESTART_XON,
  68                         IAC, SE);
  69         }
  70     }
  71 }
  72
  73 /*
  74  * clientstat
  75  *
  76  * Process linemode related requests from the client.
  77  * Client can request a change to only one of linemode, editmode or slc's
  78  * at a time, and if using kludge linemode, then only linemode may be
  79  * affected.
  80  */
  81 void
  82 clientstat(int code, int parm1, int parm2)
  83 {
  84     void netflush();
  85
  86     /*
  87      * Get a copy of terminal characteristics.
  88      */
  89     init_termbuf();
  90
  91     /*
  92      * Process request from client. code tells what it is.
  93      */
  94     switch (code) {
  95     case TELOPT_NAWS:
  96 #ifdef  TIOCSWINSZ
  97         {
  98             struct winsize ws;
  99
 100             def_col = parm1;
 101             def_row = parm2;
 102
 103             /*
 104              * Change window size as requested by client.
 105              */
 106
 107             ws.ws_col = parm1;
 108             ws.ws_row = parm2;
 109             ioctl(ourpty, TIOCSWINSZ, (char *)&ws);
 110         }
 111 #endif  /* TIOCSWINSZ */
 112
 113     break;
 114
 115     case TELOPT_TSPEED:
 116         {
 117             def_tspeed = parm1;
 118             def_rspeed = parm2;
 119             /*
 120              * Change terminal speed as requested by client.
 121              * We set the receive speed first, so that if we can't
 122              * store seperate receive and transmit speeds, the transmit
 123              * speed will take precedence.
 124              */
 125             tty_rspeed(parm2);
 126             tty_tspeed(parm1);
 127             set_termbuf();
 128
 129             break;
 130
 131         }  /* end of case TELOPT_TSPEED */
 132
 133     default:
 134         /* What? */
 135         break;
 136     }  /* end of switch */
 137
 138     netflush();
 139
 140 }