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  */
  32
  33 /*
  34  * Telnet server defines
  35  */
  36 #include <sys/types.h>
  37 #include <sys/param.h>
  38
  39 #ifndef BSD
  40 # define        BSD 43
  41 #endif
  42
  43 #if defined(PRINTOPTIONS) && defined(DIAGNOSTICS)
  44 #define TELOPTS
  45 #define TELCMDS
  46 #define SLC_NAMES
  47 #endif
  48
  49 #if     defined(SYSV_TERMIO) && !defined(USE_TERMIO)
  50 # define        USE_TERMIO
  51 #endif
  52
  53 #include <sys/socket.h>
  54 #include <sys/wait.h>
  55 #include <fcntl.h>
  56 #include <sys/file.h>
  57 #include <sys/stat.h>
  58 #include <sys/time.h>
  59 #ifndef FILIO_H
  60 #include <sys/ioctl.h>
  61 #else
  62 #include <sys/filio.h>
  63 #endif
  64
  65 #include <netinet/in.h>
  66
  67 #include <arpa/telnet.h>
  68
  69 #include <stdio.h>
  70 #ifdef  __STDC__
  71 #include <stdlib.h>
  72 #endif
  73 #include <signal.h>
  74 #include <errno.h>
  75 #include <netdb.h>
  76 #include <syslog.h>
  77 #ifndef LOG_DAEMON
  78 #define LOG_DAEMON      0
  79 #endif
  80 #ifndef LOG_ODELAY
  81 #define LOG_ODELAY      0
  82 #endif
  83 #include <ctype.h>
  84 #ifndef NO_STRING_H
  85 #include <string.h>
  86 #else
  87 #include <strings.h>
  88 #endif
  89
  90 #ifndef USE_TERMIO
  91 #include <sgtty.h>
  92 #else
  93 # ifdef SYSV_TERMIO
  94 # include <termio.h>
  95 # else
  96 # include <termios.h>
  97 # endif
  98 #endif
  99 #if !defined(USE_TERMIO) || defined(NO_CC_T)
 100 typedef unsigned char cc_t;
 101 #endif
 102
 103 #ifdef  __STDC__
 104 #include <unistd.h>
 105 #endif
 106
 107 #ifndef _POSIX_VDISABLE
 108 # ifdef VDISABLE
 109 #  define _POSIX_VDISABLE VDISABLE
 110 # else
 111 #  define _POSIX_VDISABLE ((unsigned char)'\377')
 112 # endif
 113 #endif
 114
 115 #if     !defined(TIOCSCTTY) && defined(TCSETCTTY)
 116 # define        TIOCSCTTY TCSETCTTY
 117 #endif
 118
 119 #ifndef FD_SET
 120 #ifndef HAVE_fd_set
 121 typedef struct fd_set { int fds_bits[1]; } fd_set;
 122 #endif
 123
 124 #define FD_SET(n, p)    ((p)->fds_bits[0] |= (1<<(n)))
 125 #define FD_CLR(n, p)    ((p)->fds_bits[0] &= ~(1<<(n)))
 126 #define FD_ISSET(n, p)  ((p)->fds_bits[0] & (1<<(n)))
 127 #define FD_ZERO(p)      ((p)->fds_bits[0] = 0)
 128 #endif  /* FD_SET */
 129
 130 /*
 131  * I/O data buffers defines
 132  */
 133 #define NETSLOP 64
 134
 135 #define NIACCUM(c)      {   *netip++ = c; \
 136                             ncc++; \
 137                         }
 138
 139 /* clock manipulations */
 140 #define settimer(x)     (clocks.x = ++clocks.system)
 141 #define sequenceIs(x,y) (clocks.x < clocks.y)
 142
 143 /*
 144  * Linemode support states, in decreasing order of importance
 145  */
 146 #define REAL_LINEMODE   0x04
 147 #define KLUDGE_OK       0x03
 148 #define NO_AUTOKLUDGE   0x02
 149 #define KLUDGE_LINEMODE 0x01
 150 #define NO_LINEMODE     0x00
 151
 152 /*
 153  * Structures of information for each special character function.
 154  */
 155 typedef struct {
 156         unsigned char   flag;           /* the flags for this function */
 157         cc_t            val;            /* the value of the special character */
 158 } slcent, *Slcent;
 159
 160 typedef struct {
 161         slcent          defset;         /* the default settings */
 162         slcent          current;        /* the current settings */
 163         cc_t            *sptr;          /* a pointer to the char in */
 164                                         /* system data structures */
 165 } slcfun, *Slcfun;
 166
 167 #ifdef DIAGNOSTICS
 168 /*
 169  * Diagnostics capabilities
 170  */
 171 #define TD_REPORT       0x01    /* Report operations to client */
 172 #define TD_EXERCISE     0x02    /* Exercise client's implementation */
 173 #define TD_NETDATA      0x04    /* Display received data stream */
 174 #define TD_PTYDATA      0x08    /* Display data passed to pty */
 175 #define TD_OPTIONS      0x10    /* Report just telnet options */
 176 #endif /* DIAGNOSTICS */
 177
 178 /*
 179  * We keep track of each side of the option negotiation.
 180  */
 181
 182 #define MY_STATE_WILL           0x01
 183 #define MY_WANT_STATE_WILL      0x02
 184 #define MY_STATE_DO             0x04
 185 #define MY_WANT_STATE_DO        0x08
 186
 187 /*
 188  * Macros to check the current state of things
 189  */
 190
 191 #define my_state_is_do(opt)             (options[opt]&MY_STATE_DO)
 192 #define my_state_is_will(opt)           (options[opt]&MY_STATE_WILL)
 193 #define my_want_state_is_do(opt)        (options[opt]&MY_WANT_STATE_DO)
 194 #define my_want_state_is_will(opt)      (options[opt]&MY_WANT_STATE_WILL)
 195
 196 #define my_state_is_dont(opt)           (!my_state_is_do(opt))
 197 #define my_state_is_wont(opt)           (!my_state_is_will(opt))
 198 #define my_want_state_is_dont(opt)      (!my_want_state_is_do(opt))
 199 #define my_want_state_is_wont(opt)      (!my_want_state_is_will(opt))
 200
 201 #define set_my_state_do(opt)            (options[opt] |= MY_STATE_DO)
 202 #define set_my_state_will(opt)          (options[opt] |= MY_STATE_WILL)
 203 #define set_my_want_state_do(opt)       (options[opt] |= MY_WANT_STATE_DO)
 204 #define set_my_want_state_will(opt)     (options[opt] |= MY_WANT_STATE_WILL)
 205
 206 #define set_my_state_dont(opt)          (options[opt] &= ~MY_STATE_DO)
 207 #define set_my_state_wont(opt)          (options[opt] &= ~MY_STATE_WILL)
 208 #define set_my_want_state_dont(opt)     (options[opt] &= ~MY_WANT_STATE_DO)
 209 #define set_my_want_state_wont(opt)     (options[opt] &= ~MY_WANT_STATE_WILL)
 210
 211 /*
 212  * Tricky code here.  What we want to know is if the MY_STATE_WILL
 213  * and MY_WANT_STATE_WILL bits have the same value.  Since the two
 214  * bits are adjacent, a little arithmatic will show that by adding
 215  * in the lower bit, the upper bit will be set if the two bits were
 216  * different, and clear if they were the same.
 217  */
 218 #define my_will_wont_is_changing(opt) \
 219                         ((options[opt]+MY_STATE_WILL) & MY_WANT_STATE_WILL)
 220
 221 #define my_do_dont_is_changing(opt) \
 222                         ((options[opt]+MY_STATE_DO) & MY_WANT_STATE_DO)
 223
 224 /*
 225  * Make everything symetrical
 226  */
 227
 228 #define HIS_STATE_WILL                  MY_STATE_DO
 229 #define HIS_WANT_STATE_WILL             MY_WANT_STATE_DO
 230 #define HIS_STATE_DO                    MY_STATE_WILL
 231 #define HIS_WANT_STATE_DO               MY_WANT_STATE_WILL
 232
 233 #define his_state_is_do                 my_state_is_will
 234 #define his_state_is_will               my_state_is_do
 235 #define his_want_state_is_do            my_want_state_is_will
 236 #define his_want_state_is_will          my_want_state_is_do
 237
 238 #define his_state_is_dont               my_state_is_wont
 239 #define his_state_is_wont               my_state_is_dont
 240 #define his_want_state_is_dont          my_want_state_is_wont
 241 #define his_want_state_is_wont          my_want_state_is_dont
 242
 243 #define set_his_state_do                set_my_state_will
 244 #define set_his_state_will              set_my_state_do
 245 #define set_his_want_state_do           set_my_want_state_will
 246 #define set_his_want_state_will         set_my_want_state_do
 247
 248 #define set_his_state_dont              set_my_state_wont
 249 #define set_his_state_wont              set_my_state_dont
 250 #define set_his_want_state_dont         set_my_want_state_wont
 251 #define set_his_want_state_wont         set_my_want_state_dont
 252
 253 #define his_will_wont_is_changing       my_do_dont_is_changing
 254 #define his_do_dont_is_changing         my_will_wont_is_changing