libexec/telnetd/defs.h

   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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)defs.h      8.1 (Berkeley) 6/4/93
  30  * $FreeBSD: src/crypto/telnet/telnetd/defs.h,v 1.1.1.1.8.1 2002/04/13 10:59:08 markm Exp $
  31  * $DragonFly: src/crypto/telnet/telnetd/defs.h,v 1.2 2003/06/17 04:24:37 dillon Exp $
  32  */
  33
  34 /*
  35  * Telnet server defines
  36  */
  37 #include <sys/types.h>
  38 #include <sys/param.h>
  39
  40 #ifndef BSD
  41 # define        BSD 43
  42 #endif
  43
  44 #if defined(PRINTOPTIONS) && defined(DIAGNOSTICS)
  45 #define TELOPTS
  46 #define TELCMDS
  47 #define SLC_NAMES
  48 #endif
  49
  50 #if     defined(SYSV_TERMIO) && !defined(USE_TERMIO)
  51 # define        USE_TERMIO
  52 #endif
  53
  54 #include <sys/socket.h>
  55 #include <sys/wait.h>
  56 #include <fcntl.h>
  57 #include <sys/file.h>
  58 #include <sys/stat.h>
  59 #include <sys/time.h>
  60 #ifndef FILIO_H
  61 #include <sys/ioctl.h>
  62 #else
  63 #include <sys/filio.h>
  64 #endif
  65
  66 #include <netinet/in.h>
  67
  68 #include <arpa/telnet.h>
  69
  70 #include <stdio.h>
  71 #ifdef  __STDC__
  72 #include <stdlib.h>
  73 #endif
  74 #include <signal.h>
  75 #include <errno.h>
  76 #include <netdb.h>
  77 #include <syslog.h>
  78 #ifndef LOG_DAEMON
  79 #define LOG_DAEMON      0
  80 #endif
  81 #ifndef LOG_ODELAY
  82 #define LOG_ODELAY      0
  83 #endif
  84 #include <ctype.h>
  85 #ifndef NO_STRING_H
  86 #include <string.h>
  87 #else
  88 #include <strings.h>
  89 #endif
  90
  91 #ifndef USE_TERMIO
  92 #include <sgtty.h>
  93 #else
  94 # ifdef SYSV_TERMIO
  95 # include <termio.h>
  96 # else
  97 # include <termios.h>
  98 # endif
  99 #endif
 100 #if !defined(USE_TERMIO) || defined(NO_CC_T)
 101 typedef unsigned char cc_t;
 102 #endif
 103
 104 #ifdef  __STDC__
 105 #include <unistd.h>
 106 #endif
 107
 108 #ifndef _POSIX_VDISABLE
 109 # ifdef VDISABLE
 110 #  define _POSIX_VDISABLE VDISABLE
 111 # else
 112 #  define _POSIX_VDISABLE ((unsigned char)'\377')
 113 # endif
 114 #endif
 115
 116 #if     !defined(TIOCSCTTY) && defined(TCSETCTTY)
 117 # define        TIOCSCTTY TCSETCTTY
 118 #endif
 119
 120 #ifndef FD_SET
 121 #ifndef HAVE_fd_set
 122 typedef struct fd_set { int fds_bits[1]; } fd_set;
 123 #endif
 124
 125 #define FD_SET(n, p)    ((p)->fds_bits[0] |= (1<<(n)))
 126 #define FD_CLR(n, p)    ((p)->fds_bits[0] &= ~(1<<(n)))
 127 #define FD_ISSET(n, p)  ((p)->fds_bits[0] & (1<<(n)))
 128 #define FD_ZERO(p)      ((p)->fds_bits[0] = 0)
 129 #endif  /* FD_SET */
 130
 131 /*
 132  * I/O data buffers defines
 133  */
 134 #define NETSLOP 64
 135
 136 #define NIACCUM(c)      {   *netip++ = c; \
 137                             ncc++; \
 138                         }
 139
 140 /* clock manipulations */
 141 #define settimer(x)     (clocks.x = ++clocks.system)
 142 #define sequenceIs(x,y) (clocks.x < clocks.y)
 143
 144 /*
 145  * Linemode support states, in decreasing order of importance
 146  */
 147 #define REAL_LINEMODE   0x04
 148 #define KLUDGE_OK       0x03
 149 #define NO_AUTOKLUDGE   0x02
 150 #define KLUDGE_LINEMODE 0x01
 151 #define NO_LINEMODE     0x00
 152
 153 /*
 154  * Structures of information for each special character function.
 155  */
 156 typedef struct {
 157         unsigned char   flag;           /* the flags for this function */
 158         cc_t            val;            /* the value of the special character */
 159 } slcent, *Slcent;
 160
 161 typedef struct {
 162         slcent          defset;         /* the default settings */
 163         slcent          current;        /* the current settings */
 164         cc_t            *sptr;          /* a pointer to the char in */
 165                                         /* system data structures */
 166 } slcfun, *Slcfun;
 167
 168 #ifdef DIAGNOSTICS
 169 /*
 170  * Diagnostics capabilities
 171  */
 172 #define TD_REPORT       0x01    /* Report operations to client */
 173 #define TD_EXERCISE     0x02    /* Exercise client's implementation */
 174 #define TD_NETDATA      0x04    /* Display received data stream */
 175 #define TD_PTYDATA      0x08    /* Display data passed to pty */
 176 #define TD_OPTIONS      0x10    /* Report just telnet options */
 177 #endif /* DIAGNOSTICS */
 178
 179 /*
 180  * We keep track of each side of the option negotiation.
 181  */
 182
 183 #define MY_STATE_WILL           0x01
 184 #define MY_WANT_STATE_WILL      0x02
 185 #define MY_STATE_DO             0x04
 186 #define MY_WANT_STATE_DO        0x08
 187
 188 /*
 189  * Macros to check the current state of things
 190  */
 191
 192 #define my_state_is_do(opt)             (options[opt]&MY_STATE_DO)
 193 #define my_state_is_will(opt)           (options[opt]&MY_STATE_WILL)
 194 #define my_want_state_is_do(opt)        (options[opt]&MY_WANT_STATE_DO)
 195 #define my_want_state_is_will(opt)      (options[opt]&MY_WANT_STATE_WILL)
 196
 197 #define my_state_is_dont(opt)           (!my_state_is_do(opt))
 198 #define my_state_is_wont(opt)           (!my_state_is_will(opt))
 199 #define my_want_state_is_dont(opt)      (!my_want_state_is_do(opt))
 200 #define my_want_state_is_wont(opt)      (!my_want_state_is_will(opt))
 201
 202 #define set_my_state_do(opt)            (options[opt] |= MY_STATE_DO)
 203 #define set_my_state_will(opt)          (options[opt] |= MY_STATE_WILL)
 204 #define set_my_want_state_do(opt)       (options[opt] |= MY_WANT_STATE_DO)
 205 #define set_my_want_state_will(opt)     (options[opt] |= MY_WANT_STATE_WILL)
 206
 207 #define set_my_state_dont(opt)          (options[opt] &= ~MY_STATE_DO)
 208 #define set_my_state_wont(opt)          (options[opt] &= ~MY_STATE_WILL)
 209 #define set_my_want_state_dont(opt)     (options[opt] &= ~MY_WANT_STATE_DO)
 210 #define set_my_want_state_wont(opt)     (options[opt] &= ~MY_WANT_STATE_WILL)
 211
 212 /*
 213  * Tricky code here.  What we want to know is if the MY_STATE_WILL
 214  * and MY_WANT_STATE_WILL bits have the same value.  Since the two
 215  * bits are adjacent, a little arithmatic will show that by adding
 216  * in the lower bit, the upper bit will be set if the two bits were
 217  * different, and clear if they were the same.
 218  */
 219 #define my_will_wont_is_changing(opt) \
 220                         ((options[opt]+MY_STATE_WILL) & MY_WANT_STATE_WILL)
 221
 222 #define my_do_dont_is_changing(opt) \
 223                         ((options[opt]+MY_STATE_DO) & MY_WANT_STATE_DO)
 224
 225 /*
 226  * Make everything symetrical
 227  */
 228
 229 #define HIS_STATE_WILL                  MY_STATE_DO
 230 #define HIS_WANT_STATE_WILL             MY_WANT_STATE_DO
 231 #define HIS_STATE_DO                    MY_STATE_WILL
 232 #define HIS_WANT_STATE_DO               MY_WANT_STATE_WILL
 233
 234 #define his_state_is_do                 my_state_is_will
 235 #define his_state_is_will               my_state_is_do
 236 #define his_want_state_is_do            my_want_state_is_will
 237 #define his_want_state_is_will          my_want_state_is_do
 238
 239 #define his_state_is_dont               my_state_is_wont
 240 #define his_state_is_wont               my_state_is_dont
 241 #define his_want_state_is_dont          my_want_state_is_wont
 242 #define his_want_state_is_wont          my_want_state_is_dont
 243
 244 #define set_his_state_do                set_my_state_will
 245 #define set_his_state_will              set_my_state_do
 246 #define set_his_want_state_do           set_my_want_state_will
 247 #define set_his_want_state_will         set_my_want_state_do
 248
 249 #define set_his_state_dont              set_my_state_wont
 250 #define set_his_state_wont              set_my_state_dont
 251 #define set_his_want_state_dont         set_my_want_state_wont
 252 #define set_his_want_state_wont         set_my_want_state_dont
 253
 254 #define his_will_wont_is_changing       my_do_dont_is_changing
 255 #define his_do_dont_is_changing         my_will_wont_is_changing