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. 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  *      @(#)defs.h      8.1 (Berkeley) 6/4/93
  34  * $FreeBSD: src/crypto/telnet/telnetd/defs.h,v 1.1.1.1.8.1 2002/04/13 10:59:08 markm Exp $
  35  * $DragonFly: src/crypto/telnet/telnetd/defs.h,v 1.2 2003/06/17 04:24:37 dillon Exp $
  36  */
  37
  38 /*
  39  * Telnet server defines
  40  */
  41 #include <sys/types.h>
  42 #include <sys/param.h>
  43
  44 #ifndef BSD
  45 # define        BSD 43
  46 #endif
  47
  48 #if defined(PRINTOPTIONS) && defined(DIAGNOSTICS)
  49 #define TELOPTS
  50 #define TELCMDS
  51 #define SLC_NAMES
  52 #endif
  53
  54 #if     defined(SYSV_TERMIO) && !defined(USE_TERMIO)
  55 # define        USE_TERMIO
  56 #endif
  57
  58 #include <sys/socket.h>
  59 #include <sys/wait.h>
  60 #include <fcntl.h>
  61 #include <sys/file.h>
  62 #include <sys/stat.h>
  63 #include <sys/time.h>
  64 #ifndef FILIO_H
  65 #include <sys/ioctl.h>
  66 #else
  67 #include <sys/filio.h>
  68 #endif
  69
  70 #include <netinet/in.h>
  71
  72 #include <arpa/telnet.h>
  73
  74 #include <stdio.h>
  75 #ifdef  __STDC__
  76 #include <stdlib.h>
  77 #endif
  78 #include <signal.h>
  79 #include <errno.h>
  80 #include <netdb.h>
  81 #include <syslog.h>
  82 #ifndef LOG_DAEMON
  83 #define LOG_DAEMON      0
  84 #endif
  85 #ifndef LOG_ODELAY
  86 #define LOG_ODELAY      0
  87 #endif
  88 #include <ctype.h>
  89 #ifndef NO_STRING_H
  90 #include <string.h>
  91 #else
  92 #include <strings.h>
  93 #endif
  94
  95 #ifndef USE_TERMIO
  96 #include <sgtty.h>
  97 #else
  98 # ifdef SYSV_TERMIO
  99 # include <termio.h>
 100 # else
 101 # include <termios.h>
 102 # endif
 103 #endif
 104 #if !defined(USE_TERMIO) || defined(NO_CC_T)
 105 typedef unsigned char cc_t;
 106 #endif
 107
 108 #ifdef  __STDC__
 109 #include <unistd.h>
 110 #endif
 111
 112 #ifndef _POSIX_VDISABLE
 113 # ifdef VDISABLE
 114 #  define _POSIX_VDISABLE VDISABLE
 115 # else
 116 #  define _POSIX_VDISABLE ((unsigned char)'\377')
 117 # endif
 118 #endif
 119
 120 #if     !defined(TIOCSCTTY) && defined(TCSETCTTY)
 121 # define        TIOCSCTTY TCSETCTTY
 122 #endif
 123
 124 #ifndef FD_SET
 125 #ifndef HAVE_fd_set
 126 typedef struct fd_set { int fds_bits[1]; } fd_set;
 127 #endif
 128
 129 #define FD_SET(n, p)    ((p)->fds_bits[0] |= (1<<(n)))
 130 #define FD_CLR(n, p)    ((p)->fds_bits[0] &= ~(1<<(n)))
 131 #define FD_ISSET(n, p)  ((p)->fds_bits[0] & (1<<(n)))
 132 #define FD_ZERO(p)      ((p)->fds_bits[0] = 0)
 133 #endif  /* FD_SET */
 134
 135 /*
 136  * I/O data buffers defines
 137  */
 138 #define NETSLOP 64
 139
 140 #define NIACCUM(c)      {   *netip++ = c; \
 141                             ncc++; \
 142                         }
 143
 144 /* clock manipulations */
 145 #define settimer(x)     (clocks.x = ++clocks.system)
 146 #define sequenceIs(x,y) (clocks.x < clocks.y)
 147
 148 /*
 149  * Linemode support states, in decreasing order of importance
 150  */
 151 #define REAL_LINEMODE   0x04
 152 #define KLUDGE_OK       0x03
 153 #define NO_AUTOKLUDGE   0x02
 154 #define KLUDGE_LINEMODE 0x01
 155 #define NO_LINEMODE     0x00
 156
 157 /*
 158  * Structures of information for each special character function.
 159  */
 160 typedef struct {
 161         unsigned char   flag;           /* the flags for this function */
 162         cc_t            val;            /* the value of the special character */
 163 } slcent, *Slcent;
 164
 165 typedef struct {
 166         slcent          defset;         /* the default settings */
 167         slcent          current;        /* the current settings */
 168         cc_t            *sptr;          /* a pointer to the char in */
 169                                         /* system data structures */
 170 } slcfun, *Slcfun;
 171
 172 #ifdef DIAGNOSTICS
 173 /*
 174  * Diagnostics capabilities
 175  */
 176 #define TD_REPORT       0x01    /* Report operations to client */
 177 #define TD_EXERCISE     0x02    /* Exercise client's implementation */
 178 #define TD_NETDATA      0x04    /* Display received data stream */
 179 #define TD_PTYDATA      0x08    /* Display data passed to pty */
 180 #define TD_OPTIONS      0x10    /* Report just telnet options */
 181 #endif /* DIAGNOSTICS */
 182
 183 /*
 184  * We keep track of each side of the option negotiation.
 185  */
 186
 187 #define MY_STATE_WILL           0x01
 188 #define MY_WANT_STATE_WILL      0x02
 189 #define MY_STATE_DO             0x04
 190 #define MY_WANT_STATE_DO        0x08
 191
 192 /*
 193  * Macros to check the current state of things
 194  */
 195
 196 #define my_state_is_do(opt)             (options[opt]&MY_STATE_DO)
 197 #define my_state_is_will(opt)           (options[opt]&MY_STATE_WILL)
 198 #define my_want_state_is_do(opt)        (options[opt]&MY_WANT_STATE_DO)
 199 #define my_want_state_is_will(opt)      (options[opt]&MY_WANT_STATE_WILL)
 200
 201 #define my_state_is_dont(opt)           (!my_state_is_do(opt))
 202 #define my_state_is_wont(opt)           (!my_state_is_will(opt))
 203 #define my_want_state_is_dont(opt)      (!my_want_state_is_do(opt))
 204 #define my_want_state_is_wont(opt)      (!my_want_state_is_will(opt))
 205
 206 #define set_my_state_do(opt)            (options[opt] |= MY_STATE_DO)
 207 #define set_my_state_will(opt)          (options[opt] |= MY_STATE_WILL)
 208 #define set_my_want_state_do(opt)       (options[opt] |= MY_WANT_STATE_DO)
 209 #define set_my_want_state_will(opt)     (options[opt] |= MY_WANT_STATE_WILL)
 210
 211 #define set_my_state_dont(opt)          (options[opt] &= ~MY_STATE_DO)
 212 #define set_my_state_wont(opt)          (options[opt] &= ~MY_STATE_WILL)
 213 #define set_my_want_state_dont(opt)     (options[opt] &= ~MY_WANT_STATE_DO)
 214 #define set_my_want_state_wont(opt)     (options[opt] &= ~MY_WANT_STATE_WILL)
 215
 216 /*
 217  * Tricky code here.  What we want to know is if the MY_STATE_WILL
 218  * and MY_WANT_STATE_WILL bits have the same value.  Since the two
 219  * bits are adjacent, a little arithmatic will show that by adding
 220  * in the lower bit, the upper bit will be set if the two bits were
 221  * different, and clear if they were the same.
 222  */
 223 #define my_will_wont_is_changing(opt) \
 224                         ((options[opt]+MY_STATE_WILL) & MY_WANT_STATE_WILL)
 225
 226 #define my_do_dont_is_changing(opt) \
 227                         ((options[opt]+MY_STATE_DO) & MY_WANT_STATE_DO)
 228
 229 /*
 230  * Make everything symetrical
 231  */
 232
 233 #define HIS_STATE_WILL                  MY_STATE_DO
 234 #define HIS_WANT_STATE_WILL             MY_WANT_STATE_DO
 235 #define HIS_STATE_DO                    MY_STATE_WILL
 236 #define HIS_WANT_STATE_DO               MY_WANT_STATE_WILL
 237
 238 #define his_state_is_do                 my_state_is_will
 239 #define his_state_is_will               my_state_is_do
 240 #define his_want_state_is_do            my_want_state_is_will
 241 #define his_want_state_is_will          my_want_state_is_do
 242
 243 #define his_state_is_dont               my_state_is_wont
 244 #define his_state_is_wont               my_state_is_dont
 245 #define his_want_state_is_dont          my_want_state_is_wont
 246 #define his_want_state_is_wont          my_want_state_is_dont
 247
 248 #define set_his_state_do                set_my_state_will
 249 #define set_his_state_will              set_my_state_do
 250 #define set_his_want_state_do           set_my_want_state_will
 251 #define set_his_want_state_will         set_my_want_state_do
 252
 253 #define set_his_state_dont              set_my_state_wont
 254 #define set_his_state_wont              set_my_state_dont
 255 #define set_his_want_state_dont         set_my_want_state_wont
 256 #define set_his_want_state_wont         set_my_want_state_dont
 257
 258 #define his_will_wont_is_changing       my_do_dont_is_changing
 259 #define his_do_dont_is_changing         my_will_wont_is_changing