crypto/dist/heimdal/appl/telnet/telnetd/global.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 /* a *lot* of ugly global definitions that really should be removed...
  35  */
  36
  37 #include "telnetd.h"
  38
  39 __RCSID("$Heimdal: global.c 14939 2005-04-24 20:59:35Z lha $"
  40         "$NetBSD$");
  41
  42 /*
  43  * Telnet server variable declarations
  44  */
  45 char    options[256];
  46 char    do_dont_resp[256];
  47 char    will_wont_resp[256];
  48 int     linemode;       /* linemode on/off */
  49 int     flowmode;       /* current flow control state */
  50 int     restartany;     /* restart output on any character state */
  51 #ifdef DIAGNOSTICS
  52 int     diagnostic;     /* telnet diagnostic capabilities */
  53 #endif /* DIAGNOSTICS */
  54 int     require_otp;
  55
  56 slcfun  slctab[NSLC + 1];       /* slc mapping table */
  57
  58 char    terminaltype[41];
  59
  60 /*
  61  * I/O data buffers, pointers, and counters.
  62  */
  63 char    ptyobuf[BUFSIZ+NETSLOP], *pfrontp, *pbackp;
  64
  65 char    netibuf[BUFSIZ], *netip;
  66
  67 char    netobuf[BUFSIZ+NETSLOP], *nfrontp, *nbackp;
  68 char    *neturg;                /* one past last bye of urgent data */
  69
  70 int     pcc, ncc;
  71
  72 int     ourpty, net;
  73 int     SYNCHing;               /* we are in TELNET SYNCH mode */
  74
  75 /*
  76  * The following are some clocks used to decide how to interpret
  77  * the relationship between various variables.
  78  */
  79
  80 struct clocks_t clocks;
  81
  82
  83 /* whether to log unauthenticated login attempts */
  84 int log_unauth;
  85
  86 /* do not print warning if connection is not encrypted */
  87 int no_warn;
  88
  89 /*
  90  * This function appends data to nfrontp and advances nfrontp.
  91  */
  92
  93 int
  94 output_data (const char *format, ...)
  95 {
  96   va_list args;
  97   int remaining, ret;
  98
  99   va_start(args, format);
 100   remaining = BUFSIZ - (nfrontp - netobuf);
 101   ret = vsnprintf (nfrontp,
 102                    remaining,
 103                    format,
 104                    args);
 105   nfrontp += min(ret, remaining-1);
 106   va_end(args);
 107   return ret;
 108 }