usr.bin/telnet/externs.h

   1 /*      $NetBSD: externs.h,v 1.37 2012/01/10 23:39:11 joerg Exp $       */
   2
   3 /*
   4  * Copyright (c) 1988, 1990, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      from: @(#)externs.h     8.3 (Berkeley) 5/30/95
  32  */
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <setjmp.h>
  37 #include <sys/ioctl.h>
  38 #include <errno.h>
  39 #include <sys/termios.h>
  40
  41 #include <string.h>
  42
  43 #if defined(IPSEC)
  44 #include <netipsec/ipsec.h>
  45 #if defined(IPSEC_POLICY_IPSEC)
  46 extern char *ipsec_policy_in;
  47 extern char *ipsec_policy_out;
  48 #endif
  49 #endif
  50
  51 #ifndef _POSIX_VDISABLE
  52 # ifdef sun
  53 #  include <sys/param.h>        /* pick up VDISABLE definition, mayby */
  54 # endif
  55 # ifdef VDISABLE
  56 #  define _POSIX_VDISABLE VDISABLE
  57 # else
  58 #  define _POSIX_VDISABLE ((cc_t)'\377')
  59 # endif
  60 #endif
  61
  62 #define SUBBUFSIZE      256
  63
  64 #include <sys/cdefs.h>
  65
  66 extern int
  67     autologin,          /* Autologin enabled */
  68     skiprc,             /* Don't process the ~/.telnetrc file */
  69     eight,              /* use eight bit mode (binary in and/or out */
  70     family,             /* address family of peer */
  71     flushout,           /* flush output */
  72     connected,          /* Are we connected to the other side? */
  73     globalmode,         /* Mode tty should be in */
  74     In3270,             /* Are we in 3270 mode? */
  75     telnetport,         /* Are we connected to the telnet port? */
  76     localflow,          /* Flow control handled locally */
  77     restartany,         /* If flow control, restart output on any character */
  78     localchars,         /* we recognize interrupt/quit */
  79     donelclchars,       /* the user has set "localchars" */
  80     showoptions,
  81     net,                /* Network file descriptor */
  82     tin,                /* Terminal input file descriptor */
  83     tout,               /* Terminal output file descriptor */
  84     crlf,               /* Should '\r' be mapped to <CR><LF> (or <CR><NUL>)? */
  85     autoflush,          /* flush output when interrupting? */
  86     autosynch,          /* send interrupt characters with SYNCH? */
  87     SYNCHing,           /* Is the stream in telnet SYNCH mode? */
  88     donebinarytoggle,   /* the user has put us in binary */
  89     dontlecho,          /* do we suppress local echoing right now? */
  90     crmod,
  91     netdata,            /* Print out network data flow */
  92     prettydump,         /* Print "netdata" output in user readable format */
  93 #ifdef TN3270
  94     cursesdata,         /* Print out curses data flow */
  95     apitrace,           /* Trace API transactions */
  96 #endif  /* defined(TN3270) */
  97     termdata,           /* Print out terminal data flow */
  98     telnet_debug,       /* Debug level */
  99     doaddrlookup,       /* do a reverse address lookup? */
 100     clienteof;          /* Client received EOF */
 101
 102 extern cc_t escape;     /* Escape to command mode */
 103 extern cc_t rlogin;     /* Rlogin mode escape character */
 104 #ifdef  KLUDGELINEMODE
 105 extern cc_t echoc;      /* Toggle local echoing */
 106 #endif
 107
 108 extern char
 109     *prompt;            /* Prompt for command. */
 110
 111 extern char
 112     doopt[],
 113     dont[],
 114     will[],
 115     wont[],
 116     options[],          /* All the little options */
 117     *hostname;          /* Who are we connected to? */
 118
 119 #ifdef  ENCRYPTION
 120 extern void (*encrypt_output)(unsigned char *, int);
 121 extern int (*decrypt_input)(int);
 122 #endif  /* ENCRYPTION */
 123
 124 /*
 125  * We keep track of each side of the option negotiation.
 126  */
 127
 128 #define MY_STATE_WILL           0x01
 129 #define MY_WANT_STATE_WILL      0x02
 130 #define MY_STATE_DO             0x04
 131 #define MY_WANT_STATE_DO        0x08
 132
 133 /*
 134  * Macros to check the current state of things
 135  */
 136
 137 #define my_state_is_do(opt)             (options[opt]&MY_STATE_DO)
 138 #define my_state_is_will(opt)           (options[opt]&MY_STATE_WILL)
 139 #define my_want_state_is_do(opt)        (options[opt]&MY_WANT_STATE_DO)
 140 #define my_want_state_is_will(opt)      (options[opt]&MY_WANT_STATE_WILL)
 141
 142 #define my_state_is_dont(opt)           (!my_state_is_do(opt))
 143 #define my_state_is_wont(opt)           (!my_state_is_will(opt))
 144 #define my_want_state_is_dont(opt)      (!my_want_state_is_do(opt))
 145 #define my_want_state_is_wont(opt)      (!my_want_state_is_will(opt))
 146
 147 #define set_my_state_do(opt)            {options[opt] |= MY_STATE_DO;}
 148 #define set_my_state_will(opt)          {options[opt] |= MY_STATE_WILL;}
 149 #define set_my_want_state_do(opt)       {options[opt] |= MY_WANT_STATE_DO;}
 150 #define set_my_want_state_will(opt)     {options[opt] |= MY_WANT_STATE_WILL;}
 151
 152 #define set_my_state_dont(opt)          {options[opt] &= ~MY_STATE_DO;}
 153 #define set_my_state_wont(opt)          {options[opt] &= ~MY_STATE_WILL;}
 154 #define set_my_want_state_dont(opt)     {options[opt] &= ~MY_WANT_STATE_DO;}
 155 #define set_my_want_state_wont(opt)     {options[opt] &= ~MY_WANT_STATE_WILL;}
 156
 157 /*
 158  * Make everything symmetrical
 159  */
 160
 161 #define HIS_STATE_WILL                  MY_STATE_DO
 162 #define HIS_WANT_STATE_WILL             MY_WANT_STATE_DO
 163 #define HIS_STATE_DO                    MY_STATE_WILL
 164 #define HIS_WANT_STATE_DO               MY_WANT_STATE_WILL
 165
 166 #define his_state_is_do                 my_state_is_will
 167 #define his_state_is_will               my_state_is_do
 168 #define his_want_state_is_do            my_want_state_is_will
 169 #define his_want_state_is_will          my_want_state_is_do
 170
 171 #define his_state_is_dont               my_state_is_wont
 172 #define his_state_is_wont               my_state_is_dont
 173 #define his_want_state_is_dont          my_want_state_is_wont
 174 #define his_want_state_is_wont          my_want_state_is_dont
 175
 176 #define set_his_state_do                set_my_state_will
 177 #define set_his_state_will              set_my_state_do
 178 #define set_his_want_state_do           set_my_want_state_will
 179 #define set_his_want_state_will         set_my_want_state_do
 180
 181 #define set_his_state_dont              set_my_state_wont
 182 #define set_his_state_wont              set_my_state_dont
 183 #define set_his_want_state_dont         set_my_want_state_wont
 184 #define set_his_want_state_wont         set_my_want_state_dont
 185
 186
 187 extern FILE
 188     *NetTrace;          /* Where debugging output goes */
 189 extern char
 190     NetTraceFile[];     /* Name of file where debugging output goes */
 191
 192 extern jmp_buf
 193     toplevel;           /* For error conditions. */
 194
 195
 196 /* authenc.c */
 197 int telnet_net_write(unsigned char *, int);
 198 void net_encrypt(void);
 199 int telnet_spin(void);
 200 char *telnet_getenv(char *);
 201 char *telnet_gets(char *, char *, int, int);
 202
 203 /* commands.c */
 204 int send_tncmd(void (*)(int, int), const char *, char *);
 205 void _setlist_init(void);
 206 void set_escape_char(char *);
 207 int set_mode(int);
 208 int clear_mode(int);
 209 int modehelp(int);
 210 int suspend(int, char *[]);
 211 int shell(int, char *[]);
 212 int quit(int, char *[]);
 213 int logout(int, char *[]);
 214 int env_cmd(int, char *[]);
 215 struct env_lst *env_find(const unsigned char *);
 216 void env_init(void);
 217 struct env_lst *env_define(const unsigned char *, unsigned char *);
 218 struct env_lst *env_undefine(const unsigned char *, unsigned char *);
 219 struct env_lst *env_export(const unsigned char *, unsigned char *);
 220 struct env_lst *env_unexport(const unsigned char *, unsigned char *);
 221 struct env_lst *env_send(const unsigned char *, unsigned char *);
 222 struct env_lst *env_list(const unsigned char *, unsigned char *);
 223 unsigned char *env_default(int, int );
 224 unsigned char *env_getvalue(const unsigned char *);
 225 void env_varval(const unsigned char *);
 226 int auth_cmd(int, char *[]);
 227 int ayt_status(void);
 228 int encrypt_cmd(int, char *[]);
 229 int tn(int, char *[]);
 230 void command(int, const char *, int);
 231 void cmdrc(const char *, const char *);
 232 struct addrinfo;
 233 int sourceroute(struct addrinfo *, char *, char **, int *, int*);
 234
 235 /* main.c */
 236 void tninit(void);
 237 void usage(void) __dead;
 238
 239 /* network.c */
 240 void init_network(void);
 241 int stilloob(void);
 242 void setneturg(void);
 243 int netflush(void);
 244
 245 /* sys_bsd.c */
 246 void init_sys(void);
 247 int TerminalWrite(char *, int);
 248 int TerminalRead(unsigned char *, int);
 249 int TerminalAutoFlush(void);
 250 int TerminalSpecialChars(int);
 251 void TerminalFlushOutput(void);
 252 void TerminalSaveState(void);
 253 cc_t *tcval(int);
 254 void TerminalDefaultChars(void);
 255 void TerminalRestoreState(void);
 256 void TerminalNewMode(int);
 257 void TerminalSpeeds(long *, long *);
 258 int TerminalWindowSize(long *, long *);
 259 int NetClose(int);
 260 void NetNonblockingIO(int, int);
 261 void NetSigIO(int, int);
 262 void NetSetPgrp(int);
 263 void sys_telnet_init(void);
 264 int process_rings(int , int , int , int , int , int);
 265
 266 /* telnet.c */
 267 void init_telnet(void);
 268 void send_do(int, int );
 269 void send_dont(int, int );
 270 void send_will(int, int );
 271 void send_wont(int, int );
 272 void willoption(int);
 273 void wontoption(int);
 274 char **mklist(char *, char *);
 275 int is_unique(char *, char **, char **);
 276 int setup_term(char *, int, int *);
 277 char *gettermname(void);
 278 void lm_will(unsigned char *, int);
 279 void lm_wont(unsigned char *, int);
 280 void lm_do(unsigned char *, int);
 281 void lm_dont(unsigned char *, int);
 282 void lm_mode(unsigned char *, int, int );
 283 void slc_init(void);
 284 void slcstate(void);
 285 void slc_mode_export(int);
 286 void slc_mode_import(int);
 287 void slc_import(int);
 288 void slc_export(void);
 289 void slc(unsigned char *, int);
 290 void slc_check(void);
 291 void slc_start_reply(void);
 292 void slc_add_reply(unsigned int, unsigned int, cc_t);
 293 void slc_end_reply(void);
 294 int slc_update(void);
 295 void env_opt(unsigned char *, int);
 296 void env_opt_start(void);
 297 void env_opt_start_info(void);
 298 void env_opt_add(unsigned char *);
 299 int opt_welldefined(const char *);
 300 void env_opt_end(int);
 301 int telrcv(void);
 302 int rlogin_susp(void);
 303 int Scheduler(int);
 304 void telnet(const char *);
 305 void xmitAO(void);
 306 void xmitEL(void);
 307 void xmitEC(void);
 308 int dosynch(char *);
 309 int get_status(char *);
 310 void intp(void);
 311 void sendbrk(void);
 312 void sendabort(void);
 313 void sendsusp(void);
 314 void sendeof(void);
 315 void sendayt(void);
 316 void sendnaws(void);
 317 void tel_enter_binary(int);
 318 void tel_leave_binary(int);
 319
 320 /* terminal.c */
 321 void init_terminal(void);
 322 int ttyflush(int);
 323 int getconnmode(void);
 324 void setconnmode(int);
 325 void setcommandmode(void);
 326
 327 /* utilities.c */
 328 void upcase(char *);
 329 int SetSockOpt(int, int, int, int);
 330 void SetNetTrace(char *);
 331 void Dump(int, unsigned char *, int);
 332 void printoption(const char *, int, int );
 333 void optionstatus(void);
 334 void printsub(int, unsigned char *, int);
 335 void EmptyTerminal(void);
 336 void SetForExit(void);
 337 void Exit(int) __attribute__((__noreturn__));
 338 void ExitString(const char *, int) __attribute__((__noreturn__));
 339
 340
 341 extern struct   termios new_tc;
 342
 343 # define termEofChar            new_tc.c_cc[VEOF]
 344 # define termEraseChar          new_tc.c_cc[VERASE]
 345 # define termIntChar            new_tc.c_cc[VINTR]
 346 # define termKillChar           new_tc.c_cc[VKILL]
 347 # define termQuitChar           new_tc.c_cc[VQUIT]
 348
 349 #  define termSuspChar          new_tc.c_cc[VSUSP]
 350 #  define termFlushChar         new_tc.c_cc[VDISCARD]
 351 #  define termWerasChar         new_tc.c_cc[VWERASE]
 352 #  define termRprntChar         new_tc.c_cc[VREPRINT]
 353 #  define termLiteralNextChar   new_tc.c_cc[VLNEXT]
 354 #  define termStartChar         new_tc.c_cc[VSTART]
 355 #  define termStopChar          new_tc.c_cc[VSTOP]
 356 #  define termForw1Char         new_tc.c_cc[VEOL]
 357 #  define termForw2Char         new_tc.c_cc[VEOL]
 358 #  define termAytChar           new_tc.c_cc[VSTATUS]
 359
 360 # define termEofCharp           &termEofChar
 361 # define termEraseCharp         &termEraseChar
 362 # define termIntCharp           &termIntChar
 363 # define termKillCharp          &termKillChar
 364 # define termQuitCharp          &termQuitChar
 365 # define termSuspCharp          &termSuspChar
 366 # define termFlushCharp         &termFlushChar
 367 # define termWerasCharp         &termWerasChar
 368 # define termRprntCharp         &termRprntChar
 369 # define termLiteralNextCharp   &termLiteralNextChar
 370 # define termStartCharp         &termStartChar
 371 # define termStopCharp          &termStopChar
 372 # define termForw1Charp         &termForw1Char
 373 # define termForw2Charp         &termForw2Char
 374 # define termAytCharp           &termAytChar
 375
 376
 377 /* Tn3270 section */
 378 #if     defined(TN3270)
 379
 380 extern int
 381     HaveInput,          /* Whether an asynchronous I/O indication came in */
 382     noasynchtty,        /* Don't do signals on I/O (SIGURG, SIGIO) */
 383     noasynchnet,        /* Don't do signals on I/O (SIGURG, SIGIO) */
 384     sigiocount,         /* Count of SIGIO receptions */
 385     shell_active;       /* Subshell is active */
 386
 387 extern char
 388     *Ibackp,            /* Oldest byte of 3270 data */
 389     Ibuf[],             /* 3270 buffer */
 390     *Ifrontp,           /* Where next 3270 byte goes */
 391     tline[200],
 392     *transcom;          /* Transparent command */
 393
 394 /* tn3270.c */
 395 void init_3270(void);
 396 int DataToNetwork(char *, int, int);
 397 void inputAvailable(int);
 398 void outputPurge(void);
 399 int DataToTerminal(char *, int);
 400 int Push3270(void);
 401 void Finish3270(void);
 402 void StringToTerminal(char *);
 403 int _putchar(int);
 404 void SetIn3270(void);
 405 int tn3270_ttype(void);
 406 int settranscom(int, char *[]);
 407 int shell_continue(void);
 408 int DataFromTerminal(char *, int);
 409 int DataFromNetwork(char *, int, int);
 410 void ConnectScreen(void);
 411 int DoTerminalOutput(void);
 412
 413 #endif  /* defined(TN3270) */