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 39RCSID("$Id$"); 40 41/* 42 * Telnet server variable declarations 43 */ 44char options[256]; 45char do_dont_resp[256]; 46char will_wont_resp[256]; 47int linemode; /* linemode on/off */ 48int flowmode; /* current flow control state */ 49int restartany; /* restart output on any character state */ 50#ifdef DIAGNOSTICS 51int diagnostic; /* telnet diagnostic capabilities */ 52#endif /* DIAGNOSTICS */ 53int require_otp; 54 55slcfun slctab[NSLC + 1]; /* slc mapping table */ 56 57char terminaltype[41]; 58 59/* 60 * I/O data buffers, pointers, and counters. 61 */ 62char ptyobuf[BUFSIZ+NETSLOP], *pfrontp, *pbackp; 63 64char netibuf[BUFSIZ], *netip; 65 66char netobuf[BUFSIZ+NETSLOP], *nfrontp, *nbackp; 67char *neturg; /* one past last bye of urgent data */ 68 69int pcc, ncc; 70 71int ourpty, net; 72int 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 79struct clocks_t clocks; 80 81 82/* whether to log unauthenticated login attempts */ 83int log_unauth; 84 85/* do not print warning if connection is not encrypted */ 86int no_warn; 87 88/* 89 * This function appends data to nfrontp and advances nfrontp. 90 */ 91 92int 93output_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