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