| File: | src/usr.bin/telnet/telnet.c |
| Warning: | line 1710, column 3 Value stored to 'tcc' is never read |
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| 1 | /* $OpenBSD: telnet.c,v 1.36 2019/07/11 03:54:27 deraadt Exp $ */ |
| 2 | /* $NetBSD: telnet.c,v 1.7 1996/02/28 21:04:15 thorpej Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1988, 1990, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #include "telnet_locl.h" |
| 34 | |
| 35 | #include <arpa/telnet.h> |
| 36 | #include <ctype.h> |
| 37 | #include <curses.h> |
| 38 | #include <stdlib.h> |
| 39 | #include <unistd.h> |
| 40 | #include <string.h> |
| 41 | #include <term.h> |
| 42 | |
| 43 | #define strip(x)(eight ? (x) : ((x) & 0x7f)) (eight ? (x) : ((x) & 0x7f)) |
| 44 | |
| 45 | static unsigned char subbuffer[SUBBUFSIZE256], |
| 46 | *subpointer, *subend; /* buffer for sub-options */ |
| 47 | #define SB_CLEAR()subpointer = subbuffer; subpointer = subbuffer; |
| 48 | #define SB_TERM(){ subend = subpointer; subpointer = subbuffer;; } { subend = subpointer; SB_CLEAR()subpointer = subbuffer;; } |
| 49 | #define SB_ACCUM(c)if (subpointer < (subbuffer+sizeof subbuffer)) { *subpointer ++ = (c); } if (subpointer < (subbuffer+sizeof subbuffer)) { \ |
| 50 | *subpointer++ = (c); \ |
| 51 | } |
| 52 | |
| 53 | #define SB_GET()((*subpointer++)&0xff) ((*subpointer++)&0xff) |
| 54 | #define SB_PEEK()((*subpointer)&0xff) ((*subpointer)&0xff) |
| 55 | #define SB_EOF()(subpointer >= subend) (subpointer >= subend) |
| 56 | #define SB_LEN()(subend - subpointer) (subend - subpointer) |
| 57 | |
| 58 | static void lm_will(unsigned char *, int); |
| 59 | static void lm_wont(unsigned char *, int); |
| 60 | static void lm_do(unsigned char *, int); |
| 61 | static void lm_dont(unsigned char *, int); |
| 62 | |
| 63 | static void slc_init(void); |
| 64 | static void slc_import(int); |
| 65 | static void slc_export(void); |
| 66 | static void slc_start_reply(void); |
| 67 | static void slc_add_reply(unsigned char, unsigned char, cc_t); |
| 68 | static void slc_end_reply(void); |
| 69 | static void slc(unsigned char *, int); |
| 70 | static int slc_update(void); |
| 71 | |
| 72 | static void env_opt(char *, int); |
| 73 | static void env_opt_start(void); |
| 74 | |
| 75 | char options[256]; /* The combined options */ |
| 76 | char do_dont_resp[256]; |
| 77 | char will_wont_resp[256]; |
| 78 | |
| 79 | int |
| 80 | eight = 3, |
| 81 | binary = 0, |
| 82 | autologin = 0, /* Autologin anyone? */ |
| 83 | skiprc = 0, |
| 84 | connections = 0, |
| 85 | connected, |
| 86 | showoptions, |
| 87 | ISend, /* trying to send network data in */ |
| 88 | crmod, |
| 89 | netdata, /* Print out network data flow */ |
| 90 | crlf, /* Should '\r' be mapped to <CR><LF> (or <CR><NUL>)? */ |
| 91 | telnetport, |
| 92 | SYNCHing, /* we are in TELNET SYNCH mode */ |
| 93 | flushout, /* flush output */ |
| 94 | autoflush = 0, /* flush output when interrupting? */ |
| 95 | autosynch, /* send interrupt characters with SYNCH? */ |
| 96 | localflow, /* we handle flow control locally */ |
| 97 | restartany, /* if flow control enabled, restart on any character */ |
| 98 | localchars, /* we recognize interrupt/quit */ |
| 99 | donelclchars, /* the user has set "localchars" */ |
| 100 | donebinarytoggle, /* the user has put us in binary */ |
| 101 | dontlecho, /* do we suppress local echoing right now? */ |
| 102 | globalmode, |
| 103 | clienteof = 0; |
| 104 | |
| 105 | char *prompt = NULL((void *)0); |
| 106 | |
| 107 | int scheduler_lockout_tty = 0; |
| 108 | |
| 109 | cc_t escape; |
| 110 | cc_t rlogin; |
| 111 | #ifdef KLUDGELINEMODE1 |
| 112 | cc_t echoc; |
| 113 | #endif |
| 114 | |
| 115 | /* |
| 116 | * Telnet receiver states for fsm |
| 117 | */ |
| 118 | #define TS_DATA0 0 |
| 119 | #define TS_IAC1 1 |
| 120 | #define TS_WILL2 2 |
| 121 | #define TS_WONT3 3 |
| 122 | #define TS_DO4 4 |
| 123 | #define TS_DONT5 5 |
| 124 | #define TS_CR6 6 |
| 125 | #define TS_SB7 7 /* sub-option collection */ |
| 126 | #define TS_SE8 8 /* looking for sub-option end */ |
| 127 | |
| 128 | static int telrcv_state; |
| 129 | # define telopt_environ39 TELOPT_NEW_ENVIRON39 |
| 130 | |
| 131 | jmp_buf toplevel = { 0 }; |
| 132 | jmp_buf peerdied; |
| 133 | |
| 134 | int flushline; |
| 135 | int linemode; |
| 136 | |
| 137 | #ifdef KLUDGELINEMODE1 |
| 138 | int kludgelinemode = 1; |
| 139 | #endif |
| 140 | |
| 141 | /* |
| 142 | * The following are some clocks used to decide how to interpret |
| 143 | * the relationship between various variables. |
| 144 | */ |
| 145 | |
| 146 | Clocks clocks; |
| 147 | |
| 148 | |
| 149 | /* |
| 150 | * Initialize telnet environment. |
| 151 | */ |
| 152 | |
| 153 | void |
| 154 | init_telnet(void) |
| 155 | { |
| 156 | env_init(); |
| 157 | |
| 158 | SB_CLEAR()subpointer = subbuffer;; |
| 159 | memset(options, 0, sizeof options); |
| 160 | |
| 161 | connected = ISend = localflow = donebinarytoggle = 0; |
| 162 | restartany = -1; |
| 163 | |
| 164 | SYNCHing = 0; |
| 165 | |
| 166 | escape = CONTROL(']')((']')&0x1f); |
| 167 | rlogin = _POSIX_VDISABLE(0377); |
| 168 | #ifdef KLUDGELINEMODE1 |
| 169 | echoc = CONTROL('E')(('E')&0x1f); |
| 170 | #endif |
| 171 | |
| 172 | flushline = 1; |
| 173 | telrcv_state = TS_DATA0; |
| 174 | } |
| 175 | |
| 176 | |
| 177 | /* |
| 178 | * These routines are in charge of sending option negotiations |
| 179 | * to the other side. |
| 180 | * |
| 181 | * The basic idea is that we send the negotiation if either side |
| 182 | * is in disagreement as to what the current state should be. |
| 183 | */ |
| 184 | |
| 185 | void |
| 186 | send_do(int c, int init) |
| 187 | { |
| 188 | if (init) { |
| 189 | if (((do_dont_resp[c] == 0) && my_state_is_do(c)(options[c]&0x04)) || |
| 190 | my_want_state_is_do(c)(options[c]&0x08)) |
| 191 | return; |
| 192 | set_my_want_state_do(c){options[c] |= 0x08;}; |
| 193 | do_dont_resp[c]++; |
| 194 | } |
| 195 | NET2ADD(IAC, DO){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 253; ring_supplied(&netoring, 1); } ; }; |
| 196 | NETADD(c){ *netoring.supply = c; ring_supplied(&netoring, 1); }; |
| 197 | printoption("SENT",DO253, c); |
| 198 | } |
| 199 | |
| 200 | void |
| 201 | send_dont(int c, int init) |
| 202 | { |
| 203 | if (init) { |
| 204 | if (((do_dont_resp[c] == 0) && my_state_is_dont(c)(!(options[c]&0x04))) || |
| 205 | my_want_state_is_dont(c)(!(options[c]&0x08))) |
| 206 | return; |
| 207 | set_my_want_state_dont(c){options[c] &= ~0x08;}; |
| 208 | do_dont_resp[c]++; |
| 209 | } |
| 210 | NET2ADD(IAC, DONT){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 254; ring_supplied(&netoring, 1); } ; }; |
| 211 | NETADD(c){ *netoring.supply = c; ring_supplied(&netoring, 1); }; |
| 212 | printoption("SENT", DONT254, c); |
| 213 | } |
| 214 | |
| 215 | void |
| 216 | send_will(int c, int init) |
| 217 | { |
| 218 | if (init) { |
| 219 | if (((will_wont_resp[c] == 0) && my_state_is_will(c)(options[c]&0x01)) || |
| 220 | my_want_state_is_will(c)(options[c]&0x02)) |
| 221 | return; |
| 222 | set_my_want_state_will(c){options[c] |= 0x02;}; |
| 223 | will_wont_resp[c]++; |
| 224 | } |
| 225 | NET2ADD(IAC, WILL){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 251; ring_supplied(&netoring, 1); } ; }; |
| 226 | NETADD(c){ *netoring.supply = c; ring_supplied(&netoring, 1); }; |
| 227 | printoption("SENT", WILL251, c); |
| 228 | } |
| 229 | |
| 230 | void |
| 231 | send_wont(int c, int init) |
| 232 | { |
| 233 | if (init) { |
| 234 | if (((will_wont_resp[c] == 0) && my_state_is_wont(c)(!(options[c]&0x01))) || |
| 235 | my_want_state_is_wont(c)(!(options[c]&0x02))) |
| 236 | return; |
| 237 | set_my_want_state_wont(c){options[c] &= ~0x02;}; |
| 238 | will_wont_resp[c]++; |
| 239 | } |
| 240 | NET2ADD(IAC, WONT){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 252; ring_supplied(&netoring, 1); } ; }; |
| 241 | NETADD(c){ *netoring.supply = c; ring_supplied(&netoring, 1); }; |
| 242 | printoption("SENT", WONT252, c); |
| 243 | } |
| 244 | |
| 245 | static void |
| 246 | willoption(int option) |
| 247 | { |
| 248 | int new_state_ok = 0; |
| 249 | |
| 250 | if (do_dont_resp[option]) { |
| 251 | --do_dont_resp[option]; |
| 252 | if (do_dont_resp[option] && my_state_is_do(option)(options[option]&0x04)) |
| 253 | --do_dont_resp[option]; |
| 254 | } |
| 255 | |
| 256 | if ((do_dont_resp[option] == 0) && my_want_state_is_dont(option)(!(options[option]&0x08))) { |
| 257 | |
| 258 | switch (option) { |
| 259 | |
| 260 | case TELOPT_ECHO1: |
| 261 | case TELOPT_BINARY0: |
| 262 | case TELOPT_SGA3: |
| 263 | settimer(modenegotiated)clocks.modenegotiated = clocks.system++; |
| 264 | /* FALL THROUGH */ |
| 265 | case TELOPT_STATUS5: |
| 266 | new_state_ok = 1; |
| 267 | break; |
| 268 | |
| 269 | case TELOPT_TM6: |
| 270 | if (flushout) |
| 271 | flushout = 0; |
| 272 | /* |
| 273 | * Special case for TM. If we get back a WILL, |
| 274 | * pretend we got back a WONT. |
| 275 | */ |
| 276 | set_my_want_state_dont(option){options[option] &= ~0x08;}; |
| 277 | set_my_state_dont(option){options[option] &= ~0x04;}; |
| 278 | return; /* Never reply to TM will's/wont's */ |
| 279 | |
| 280 | case TELOPT_LINEMODE34: |
| 281 | default: |
| 282 | break; |
| 283 | } |
| 284 | |
| 285 | if (new_state_ok) { |
| 286 | set_my_want_state_do(option){options[option] |= 0x08;}; |
| 287 | send_do(option, 0); |
| 288 | setconnmode(0); /* possibly set new tty mode */ |
| 289 | } else { |
| 290 | do_dont_resp[option]++; |
| 291 | send_dont(option, 0); |
| 292 | } |
| 293 | } |
| 294 | set_my_state_do(option){options[option] |= 0x04;}; |
| 295 | |
| 296 | } |
| 297 | |
| 298 | static void |
| 299 | wontoption(int option) |
| 300 | { |
| 301 | if (do_dont_resp[option]) { |
| 302 | --do_dont_resp[option]; |
| 303 | if (do_dont_resp[option] && my_state_is_dont(option)(!(options[option]&0x04))) |
| 304 | --do_dont_resp[option]; |
| 305 | } |
| 306 | |
| 307 | if ((do_dont_resp[option] == 0) && my_want_state_is_do(option)(options[option]&0x08)) { |
| 308 | |
| 309 | switch (option) { |
| 310 | |
| 311 | #ifdef KLUDGELINEMODE1 |
| 312 | case TELOPT_SGA3: |
| 313 | if (!kludgelinemode) |
| 314 | break; |
| 315 | /* FALL THROUGH */ |
| 316 | #endif |
| 317 | case TELOPT_ECHO1: |
| 318 | settimer(modenegotiated)clocks.modenegotiated = clocks.system++; |
| 319 | break; |
| 320 | |
| 321 | case TELOPT_TM6: |
| 322 | if (flushout) |
| 323 | flushout = 0; |
| 324 | set_my_want_state_dont(option){options[option] &= ~0x08;}; |
| 325 | set_my_state_dont(option){options[option] &= ~0x04;}; |
| 326 | return; /* Never reply to TM will's/wont's */ |
| 327 | |
| 328 | default: |
| 329 | break; |
| 330 | } |
| 331 | set_my_want_state_dont(option){options[option] &= ~0x08;}; |
| 332 | if (my_state_is_do(option)(options[option]&0x04)) |
| 333 | send_dont(option, 0); |
| 334 | setconnmode(0); /* Set new tty mode */ |
| 335 | } else if (option == TELOPT_TM6) { |
| 336 | /* |
| 337 | * Special case for TM. |
| 338 | */ |
| 339 | if (flushout) |
| 340 | flushout = 0; |
| 341 | set_my_want_state_dont(option){options[option] &= ~0x08;}; |
| 342 | } |
| 343 | set_my_state_dont(option){options[option] &= ~0x04;}; |
| 344 | } |
| 345 | |
| 346 | static void |
| 347 | dooption(int option) |
| 348 | { |
| 349 | int new_state_ok = 0; |
| 350 | |
| 351 | if (will_wont_resp[option]) { |
| 352 | --will_wont_resp[option]; |
| 353 | if (will_wont_resp[option] && my_state_is_will(option)(options[option]&0x01)) |
| 354 | --will_wont_resp[option]; |
| 355 | } |
| 356 | |
| 357 | if (will_wont_resp[option] == 0) { |
| 358 | if (my_want_state_is_wont(option)(!(options[option]&0x02))) { |
| 359 | |
| 360 | switch (option) { |
| 361 | |
| 362 | case TELOPT_TM6: |
| 363 | /* |
| 364 | * Special case for TM. We send a WILL, but pretend |
| 365 | * we sent WONT. |
| 366 | */ |
| 367 | send_will(option, 0); |
| 368 | set_my_want_state_wont(TELOPT_TM){options[6] &= ~0x02;}; |
| 369 | set_my_state_wont(TELOPT_TM){options[6] &= ~0x01;}; |
| 370 | return; |
| 371 | |
| 372 | case TELOPT_BINARY0: /* binary mode */ |
| 373 | case TELOPT_NAWS31: /* window size */ |
| 374 | case TELOPT_TSPEED32: /* terminal speed */ |
| 375 | case TELOPT_LFLOW33: /* local flow control */ |
| 376 | case TELOPT_TTYPE24: /* terminal type option */ |
| 377 | case TELOPT_SGA3: /* no big deal */ |
| 378 | new_state_ok = 1; |
| 379 | break; |
| 380 | |
| 381 | case TELOPT_NEW_ENVIRON39: /* New environment variable option */ |
| 382 | new_state_ok = 1; |
| 383 | break; |
| 384 | |
| 385 | case TELOPT_XDISPLOC35: /* X Display location */ |
| 386 | if (env_getvalue("DISPLAY", 0)) |
| 387 | new_state_ok = 1; |
| 388 | break; |
| 389 | |
| 390 | case TELOPT_LINEMODE34: |
| 391 | #ifdef KLUDGELINEMODE1 |
| 392 | kludgelinemode = 0; |
| 393 | send_do(TELOPT_SGA3, 1); |
| 394 | #endif |
| 395 | set_my_want_state_will(TELOPT_LINEMODE){options[34] |= 0x02;}; |
| 396 | send_will(option, 0); |
| 397 | set_my_state_will(TELOPT_LINEMODE){options[34] |= 0x01;}; |
| 398 | slc_init(); |
| 399 | return; |
| 400 | |
| 401 | case TELOPT_ECHO1: /* We're never going to echo... */ |
| 402 | default: |
| 403 | break; |
| 404 | } |
| 405 | |
| 406 | if (new_state_ok) { |
| 407 | set_my_want_state_will(option){options[option] |= 0x02;}; |
| 408 | send_will(option, 0); |
| 409 | setconnmode(0); /* Set new tty mode */ |
| 410 | } else { |
| 411 | will_wont_resp[option]++; |
| 412 | send_wont(option, 0); |
| 413 | } |
| 414 | } else { |
| 415 | /* |
| 416 | * Handle options that need more things done after the |
| 417 | * other side has acknowledged the option. |
| 418 | */ |
| 419 | switch (option) { |
| 420 | case TELOPT_LINEMODE34: |
| 421 | #ifdef KLUDGELINEMODE1 |
| 422 | kludgelinemode = 0; |
| 423 | send_do(TELOPT_SGA3, 1); |
| 424 | #endif |
| 425 | set_my_state_will(option){options[option] |= 0x01;}; |
| 426 | slc_init(); |
| 427 | send_do(TELOPT_SGA3, 0); |
| 428 | return; |
| 429 | } |
| 430 | } |
| 431 | } |
| 432 | set_my_state_will(option){options[option] |= 0x01;}; |
| 433 | } |
| 434 | |
| 435 | static void |
| 436 | dontoption(int option) |
| 437 | { |
| 438 | |
| 439 | if (will_wont_resp[option]) { |
| 440 | --will_wont_resp[option]; |
| 441 | if (will_wont_resp[option] && my_state_is_wont(option)(!(options[option]&0x01))) |
| 442 | --will_wont_resp[option]; |
| 443 | } |
| 444 | |
| 445 | if ((will_wont_resp[option] == 0) && my_want_state_is_will(option)(options[option]&0x02)) { |
| 446 | switch (option) { |
| 447 | case TELOPT_LINEMODE34: |
| 448 | linemode = 0; /* put us back to the default state */ |
| 449 | break; |
| 450 | } |
| 451 | /* we always accept a DONT */ |
| 452 | set_my_want_state_wont(option){options[option] &= ~0x02;}; |
| 453 | if (my_state_is_will(option)(options[option]&0x01)) |
| 454 | send_wont(option, 0); |
| 455 | setconnmode(0); /* Set new tty mode */ |
| 456 | } |
| 457 | set_my_state_wont(option){options[option] &= ~0x01;}; |
| 458 | } |
| 459 | |
| 460 | /* |
| 461 | * This routine will turn a pipe separated list of names in the buffer |
| 462 | * into an array of pointers to NUL terminated names. We toss out any |
| 463 | * bad, duplicate, or verbose names (names with spaces). |
| 464 | */ |
| 465 | |
| 466 | int is_unique(char *, char **, char **); |
| 467 | |
| 468 | static char *name_unknown = "UNKNOWN"; |
| 469 | static char *unknown[] = { NULL((void *)0), NULL((void *)0) }; |
| 470 | |
| 471 | char ** |
| 472 | mklist(char *buf, char *name) |
| 473 | { |
| 474 | int n; |
| 475 | char c, *cp, **argvp, *cp2, **argv, **avt; |
| 476 | |
| 477 | if (name) { |
| 478 | if (strlen(name) > 40) { |
| 479 | name = NULL((void *)0); |
| 480 | unknown[0] = name_unknown; |
| 481 | } else { |
| 482 | unknown[0] = name; |
| 483 | upcase(name); |
| 484 | } |
| 485 | } else |
| 486 | unknown[0] = name_unknown; |
| 487 | /* |
| 488 | * Count up the number of names. |
| 489 | */ |
| 490 | for (n = 1, cp = buf; *cp; cp++) { |
| 491 | if (*cp == '|') |
| 492 | n++; |
| 493 | } |
| 494 | /* |
| 495 | * Allocate an array to put the name pointers into |
| 496 | */ |
| 497 | argv = reallocarray(NULL((void *)0), n+3, sizeof(char *)); |
| 498 | if (argv == NULL((void *)0)) |
| 499 | return(unknown); |
| 500 | |
| 501 | /* |
| 502 | * Fill up the array of pointers to names. |
| 503 | */ |
| 504 | *argv = NULL((void *)0); |
| 505 | argvp = argv+1; |
| 506 | n = 0; |
| 507 | for (cp = cp2 = buf; (c = *cp); cp++) { |
| 508 | if (c == '|' || c == ':') { |
| 509 | *cp++ = '\0'; |
| 510 | /* |
| 511 | * Skip entries that have spaces or are over 40 |
| 512 | * characters long. If this is our environment |
| 513 | * name, then put it up front. Otherwise, as |
| 514 | * long as this is not a duplicate name (case |
| 515 | * insensitive) add it to the list. |
| 516 | */ |
| 517 | if (n || (cp - cp2 > 41)) |
| 518 | ; |
| 519 | else if (name && (strncasecmp(name, cp2, cp-cp2) == 0)) |
| 520 | *argv = cp2; |
| 521 | else if (is_unique(cp2, argv+1, argvp)) |
| 522 | *argvp++ = cp2; |
| 523 | if (c == ':') |
| 524 | break; |
| 525 | /* |
| 526 | * Skip multiple delimiters. Reset cp2 to |
| 527 | * the beginning of the next name. Reset n, |
| 528 | * the flag for names with spaces. |
| 529 | */ |
| 530 | while ((c = *cp) == '|') |
| 531 | cp++; |
| 532 | cp2 = cp; |
| 533 | n = 0; |
| 534 | } |
| 535 | /* |
| 536 | * Skip entries with spaces or non-ascii values. |
| 537 | * Convert lower case letters to upper case. |
| 538 | */ |
| 539 | #define ISASCII(c)(!((c)&0x80)) (!((c)&0x80)) |
| 540 | if ((c == ' ') || !ISASCII(c)(!((c)&0x80))) |
| 541 | n = 1; |
| 542 | else |
| 543 | *cp = toupper((unsigned char)c); |
| 544 | } |
| 545 | |
| 546 | /* |
| 547 | * Check for an old V6 2 character name. If the second |
| 548 | * name points to the beginning of the buffer, and is |
| 549 | * only 2 characters long, move it to the end of the array. |
| 550 | */ |
| 551 | if ((argv[1] == buf) && (strlen(argv[1]) == 2)) { |
| 552 | --argvp; |
| 553 | for (avt = &argv[1]; avt < argvp; avt++) |
| 554 | *avt = *(avt+1); |
| 555 | *argvp++ = buf; |
| 556 | } |
| 557 | |
| 558 | /* |
| 559 | * Duplicate last name, for TTYPE option, and null |
| 560 | * terminate the array. If we didn't find a match on |
| 561 | * our terminal name, put that name at the beginning. |
| 562 | */ |
| 563 | cp = *(argvp-1); |
| 564 | *argvp++ = cp; |
| 565 | *argvp = NULL((void *)0); |
| 566 | |
| 567 | if (*argv == NULL((void *)0)) { |
| 568 | if (name) |
| 569 | *argv = name; |
| 570 | else { |
| 571 | --argvp; |
| 572 | for (avt = argv; avt < argvp; avt++) |
| 573 | *avt = *(avt+1); |
| 574 | } |
| 575 | } |
| 576 | if (*argv) |
| 577 | return(argv); |
| 578 | else |
| 579 | return(unknown); |
| 580 | } |
| 581 | |
| 582 | int |
| 583 | is_unique(char *name, char **as, char **ae) |
| 584 | { |
| 585 | char **ap; |
| 586 | int n; |
| 587 | |
| 588 | n = strlen(name) + 1; |
| 589 | for (ap = as; ap < ae; ap++) |
| 590 | if (strncasecmp(*ap, name, n) == 0) |
| 591 | return(0); |
| 592 | return (1); |
| 593 | } |
| 594 | |
| 595 | int resettermname = 1; |
| 596 | |
| 597 | char * |
| 598 | gettermname(void) |
| 599 | { |
| 600 | char *tname; |
| 601 | static char **tnamep = NULL((void *)0); |
| 602 | static char **next; |
| 603 | int errret; |
| 604 | |
| 605 | if (resettermname) { |
| 606 | resettermname = 0; |
| 607 | if (tnamep && tnamep != unknown) |
| 608 | free(tnamep); |
| 609 | if ((tname = env_getvalue("TERM", 0)) && |
| 610 | (setupterm(tname, 1, &errret) == OK(0))) { |
| 611 | tnamep = mklist(ttytype, tname); |
| 612 | } else { |
| 613 | if (tname && (strlen(tname) <= 40)) { |
| 614 | unknown[0] = tname; |
| 615 | upcase(tname); |
| 616 | } else |
| 617 | unknown[0] = name_unknown; |
| 618 | tnamep = unknown; |
| 619 | } |
| 620 | next = tnamep; |
| 621 | } |
| 622 | if (*next == NULL((void *)0)) |
| 623 | next = tnamep; |
| 624 | return(*next++); |
| 625 | } |
| 626 | |
| 627 | /* |
| 628 | * suboption() |
| 629 | * |
| 630 | * Look at the sub-option buffer, and try to be helpful to the other |
| 631 | * side. |
| 632 | * |
| 633 | * Currently we recognize: |
| 634 | * |
| 635 | * Terminal type, send request. |
| 636 | * Terminal speed (send request). |
| 637 | * Local flow control (is request). |
| 638 | * Linemode |
| 639 | */ |
| 640 | |
| 641 | static void |
| 642 | suboption(void) |
| 643 | { |
| 644 | unsigned char subchar; |
| 645 | |
| 646 | printsub('<', subbuffer, SB_LEN()(subend - subpointer)+2); |
| 647 | switch (subchar = SB_GET()((*subpointer++)&0xff)) { |
| 648 | case TELOPT_TTYPE24: |
| 649 | if (my_want_state_is_wont(TELOPT_TTYPE)(!(options[24]&0x02))) |
| 650 | return; |
| 651 | if (SB_EOF()(subpointer >= subend) || SB_GET()((*subpointer++)&0xff) != TELQUAL_SEND1) { |
| 652 | return; |
| 653 | } else { |
| 654 | char *name; |
| 655 | unsigned char temp[50]; |
| 656 | int len; |
| 657 | |
| 658 | name = gettermname(); |
| 659 | len = strlen(name) + 4 + 2; |
| 660 | if (len < NETROOM()(ring_empty_count(&netoring))) { |
| 661 | snprintf((char *)temp, sizeof(temp), |
| 662 | "%c%c%c%c%s%c%c", IAC255, SB250, TELOPT_TTYPE24, |
| 663 | TELQUAL_IS0, name, IAC255, SE240); |
| 664 | ring_supply_data(&netoring, temp, len); |
| 665 | printsub('>', &temp[2], len-2); |
| 666 | } else |
| 667 | ExitString("No room in buffer for terminal type.\n", 1); |
| 668 | } |
| 669 | break; |
| 670 | case TELOPT_TSPEED32: |
| 671 | if (my_want_state_is_wont(TELOPT_TSPEED)(!(options[32]&0x02))) |
| 672 | return; |
| 673 | if (SB_EOF()(subpointer >= subend)) |
| 674 | return; |
| 675 | if (SB_GET()((*subpointer++)&0xff) == TELQUAL_SEND1) { |
| 676 | long ospeed, ispeed; |
| 677 | unsigned char temp[50]; |
| 678 | int len; |
| 679 | |
| 680 | TerminalSpeeds(&ispeed, &ospeed); |
| 681 | |
| 682 | snprintf((char *)temp, sizeof(temp), |
| 683 | "%c%c%c%c%ld,%ld%c%c", IAC255, SB250, TELOPT_TSPEED32, |
| 684 | TELQUAL_IS0, ospeed, ispeed, IAC255, SE240); |
| 685 | len = strlen((char *)temp+4) + 4; /* temp[3] is 0 ... */ |
| 686 | |
| 687 | if (len < NETROOM()(ring_empty_count(&netoring))) { |
| 688 | ring_supply_data(&netoring, temp, len); |
| 689 | printsub('>', temp+2, len - 2); |
| 690 | } |
| 691 | /*@*/ else printf("lm_will: not enough room in buffer\n"); |
| 692 | } |
| 693 | break; |
| 694 | case TELOPT_LFLOW33: |
| 695 | if (my_want_state_is_wont(TELOPT_LFLOW)(!(options[33]&0x02))) |
| 696 | return; |
| 697 | if (SB_EOF()(subpointer >= subend)) |
| 698 | return; |
| 699 | switch(SB_GET()((*subpointer++)&0xff)) { |
| 700 | case LFLOW_RESTART_ANY2: |
| 701 | restartany = 1; |
| 702 | break; |
| 703 | case LFLOW_RESTART_XON3: |
| 704 | restartany = 0; |
| 705 | break; |
| 706 | case LFLOW_ON1: |
| 707 | localflow = 1; |
| 708 | break; |
| 709 | case LFLOW_OFF0: |
| 710 | localflow = 0; |
| 711 | break; |
| 712 | default: |
| 713 | return; |
| 714 | } |
| 715 | setcommandmode(); |
| 716 | setconnmode(0); |
| 717 | break; |
| 718 | |
| 719 | case TELOPT_LINEMODE34: |
| 720 | if (my_want_state_is_wont(TELOPT_LINEMODE)(!(options[34]&0x02))) |
| 721 | return; |
| 722 | if (SB_EOF()(subpointer >= subend)) |
| 723 | return; |
| 724 | switch (SB_GET()((*subpointer++)&0xff)) { |
| 725 | case WILL251: |
| 726 | lm_will(subpointer, SB_LEN()(subend - subpointer)); |
| 727 | break; |
| 728 | case WONT252: |
| 729 | lm_wont(subpointer, SB_LEN()(subend - subpointer)); |
| 730 | break; |
| 731 | case DO253: |
| 732 | lm_do(subpointer, SB_LEN()(subend - subpointer)); |
| 733 | break; |
| 734 | case DONT254: |
| 735 | lm_dont(subpointer, SB_LEN()(subend - subpointer)); |
| 736 | break; |
| 737 | case LM_SLC3: |
| 738 | slc(subpointer, SB_LEN()(subend - subpointer)); |
| 739 | break; |
| 740 | case LM_MODE1: |
| 741 | lm_mode(subpointer, SB_LEN()(subend - subpointer), 0); |
| 742 | break; |
| 743 | default: |
| 744 | break; |
| 745 | } |
| 746 | break; |
| 747 | |
| 748 | case TELOPT_NEW_ENVIRON39: |
| 749 | if (SB_EOF()(subpointer >= subend)) |
| 750 | return; |
| 751 | switch(SB_PEEK()((*subpointer)&0xff)) { |
| 752 | case TELQUAL_IS0: |
| 753 | case TELQUAL_INFO2: |
| 754 | if (my_want_state_is_dont(subchar)(!(options[subchar]&0x08))) |
| 755 | return; |
| 756 | break; |
| 757 | case TELQUAL_SEND1: |
| 758 | if (my_want_state_is_wont(subchar)(!(options[subchar]&0x02))) { |
| 759 | return; |
| 760 | } |
| 761 | break; |
| 762 | default: |
| 763 | return; |
| 764 | } |
| 765 | env_opt(subpointer, SB_LEN()(subend - subpointer)); |
| 766 | break; |
| 767 | |
| 768 | case TELOPT_XDISPLOC35: |
| 769 | if (my_want_state_is_wont(TELOPT_XDISPLOC)(!(options[35]&0x02))) |
| 770 | return; |
| 771 | if (SB_EOF()(subpointer >= subend)) |
| 772 | return; |
| 773 | if (SB_GET()((*subpointer++)&0xff) == TELQUAL_SEND1) { |
| 774 | unsigned char temp[50], *dp; |
| 775 | int len; |
| 776 | |
| 777 | if ((dp = env_getvalue("DISPLAY", 0)) == NULL((void *)0)) { |
| 778 | /* |
| 779 | * Something happened, we no longer have a DISPLAY |
| 780 | * variable. So, turn off the option. |
| 781 | */ |
| 782 | send_wont(TELOPT_XDISPLOC35, 1); |
| 783 | break; |
| 784 | } |
| 785 | snprintf((char *)temp, sizeof(temp), |
| 786 | "%c%c%c%c%s%c%c", IAC255, SB250, TELOPT_XDISPLOC35, |
| 787 | TELQUAL_IS0, dp, IAC255, SE240); |
| 788 | len = strlen((char *)temp+4) + 4; /* temp[3] is 0 ... */ |
| 789 | |
| 790 | if (len < NETROOM()(ring_empty_count(&netoring))) { |
| 791 | ring_supply_data(&netoring, temp, len); |
| 792 | printsub('>', temp+2, len - 2); |
| 793 | } |
| 794 | /*@*/ else printf("lm_will: not enough room in buffer\n"); |
| 795 | } |
| 796 | break; |
| 797 | |
| 798 | default: |
| 799 | break; |
| 800 | } |
| 801 | } |
| 802 | |
| 803 | static unsigned char str_lm[] = { IAC255, SB250, TELOPT_LINEMODE34, 0, 0, IAC255, SE240 }; |
| 804 | |
| 805 | static void |
| 806 | lm_will(unsigned char *cmd, int len) |
| 807 | { |
| 808 | if (len < 1) { |
| 809 | /*@*/ printf("lm_will: no command!!!\n"); /* Should not happen... */ |
| 810 | return; |
| 811 | } |
| 812 | switch(cmd[0]) { |
| 813 | case LM_FORWARDMASK2: /* We shouldn't ever get this... */ |
| 814 | default: |
| 815 | str_lm[3] = DONT254; |
| 816 | str_lm[4] = cmd[0]; |
| 817 | if (NETROOM()(ring_empty_count(&netoring)) > sizeof(str_lm)) { |
| 818 | ring_supply_data(&netoring, str_lm, sizeof(str_lm)); |
| 819 | printsub('>', &str_lm[2], sizeof(str_lm)-2); |
| 820 | } |
| 821 | /*@*/ else printf("lm_will: not enough room in buffer\n"); |
| 822 | break; |
| 823 | } |
| 824 | } |
| 825 | |
| 826 | static void |
| 827 | lm_wont(unsigned char *cmd, int len) |
| 828 | { |
| 829 | if (len < 1) { |
| 830 | /*@*/ printf("lm_wont: no command!!!\n"); /* Should not happen... */ |
| 831 | return; |
| 832 | } |
| 833 | switch(cmd[0]) { |
| 834 | case LM_FORWARDMASK2: /* We shouldn't ever get this... */ |
| 835 | default: |
| 836 | /* We are always DONT, so don't respond */ |
| 837 | return; |
| 838 | } |
| 839 | } |
| 840 | |
| 841 | static void |
| 842 | lm_do(unsigned char *cmd, int len) |
| 843 | { |
| 844 | if (len < 1) { |
| 845 | /*@*/ printf("lm_do: no command!!!\n"); /* Should not happen... */ |
| 846 | return; |
| 847 | } |
| 848 | switch(cmd[0]) { |
| 849 | case LM_FORWARDMASK2: |
| 850 | default: |
| 851 | str_lm[3] = WONT252; |
| 852 | str_lm[4] = cmd[0]; |
| 853 | if (NETROOM()(ring_empty_count(&netoring)) > sizeof(str_lm)) { |
| 854 | ring_supply_data(&netoring, str_lm, sizeof(str_lm)); |
| 855 | printsub('>', &str_lm[2], sizeof(str_lm)-2); |
| 856 | } |
| 857 | /*@*/ else printf("lm_do: not enough room in buffer\n"); |
| 858 | break; |
| 859 | } |
| 860 | } |
| 861 | |
| 862 | static void |
| 863 | lm_dont(unsigned char *cmd, int len) |
| 864 | { |
| 865 | if (len < 1) { |
| 866 | /*@*/ printf("lm_dont: no command!!!\n"); /* Should not happen... */ |
| 867 | return; |
| 868 | } |
| 869 | switch(cmd[0]) { |
| 870 | case LM_FORWARDMASK2: |
| 871 | default: |
| 872 | /* we are always WONT, so don't respond */ |
| 873 | break; |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | static unsigned char str_lm_mode[] = { |
| 878 | IAC255, SB250, TELOPT_LINEMODE34, LM_MODE1, 0, IAC255, SE240 |
| 879 | }; |
| 880 | |
| 881 | void |
| 882 | lm_mode(unsigned char *cmd, int len, int init) |
| 883 | { |
| 884 | if (len != 1) |
| 885 | return; |
| 886 | if ((linemode&MODE_MASK0x1f&~MODE_ACK0x04) == *cmd) |
| 887 | return; |
| 888 | if (*cmd&MODE_ACK0x04) |
| 889 | return; |
| 890 | linemode = *cmd&(MODE_MASK0x1f&~MODE_ACK0x04); |
| 891 | str_lm_mode[4] = linemode; |
| 892 | if (!init) |
| 893 | str_lm_mode[4] |= MODE_ACK0x04; |
| 894 | if (NETROOM()(ring_empty_count(&netoring)) > sizeof(str_lm_mode)) { |
| 895 | ring_supply_data(&netoring, str_lm_mode, sizeof(str_lm_mode)); |
| 896 | printsub('>', &str_lm_mode[2], sizeof(str_lm_mode)-2); |
| 897 | } |
| 898 | /*@*/ else printf("lm_mode: not enough room in buffer\n"); |
| 899 | setconnmode(0); /* set changed mode */ |
| 900 | } |
| 901 | |
| 902 | |
| 903 | |
| 904 | /* |
| 905 | * slc() |
| 906 | * Handle special character suboption of LINEMODE. |
| 907 | */ |
| 908 | |
| 909 | struct spc { |
| 910 | cc_t val; |
| 911 | cc_t *valp; |
| 912 | char flags; /* Current flags & level */ |
| 913 | char mylevel; /* Maximum level & flags */ |
| 914 | } spc_data[NSLC30+1]; |
| 915 | |
| 916 | #define SLC_IMPORT0 0 |
| 917 | #define SLC_EXPORT1 1 |
| 918 | #define SLC_RVALUE2 2 |
| 919 | static int slc_mode = SLC_EXPORT1; |
| 920 | |
| 921 | static void |
| 922 | slc_init(void) |
| 923 | { |
| 924 | struct spc *spcp; |
| 925 | |
| 926 | localchars = 1; |
| 927 | for (spcp = spc_data; spcp < &spc_data[NSLC30+1]; spcp++) { |
| 928 | spcp->val = 0; |
| 929 | spcp->valp = NULL((void *)0); |
| 930 | spcp->flags = spcp->mylevel = SLC_NOSUPPORT0; |
| 931 | } |
| 932 | |
| 933 | #define initfunc(func, flags) { \ |
| 934 | spcp = &spc_data[func]; \ |
| 935 | if ((spcp->valp = tcval(func))) { \ |
| 936 | spcp->val = *spcp->valp; \ |
| 937 | spcp->mylevel = SLC_VARIABLE2|flags; \ |
| 938 | } else { \ |
| 939 | spcp->val = 0; \ |
| 940 | spcp->mylevel = SLC_DEFAULT3; \ |
| 941 | } \ |
| 942 | } |
| 943 | |
| 944 | initfunc(SLC_SYNCH1, 0); |
| 945 | /* No BRK */ |
| 946 | initfunc(SLC_AO4, 0); |
| 947 | initfunc(SLC_AYT5, 0); |
| 948 | /* No EOR */ |
| 949 | initfunc(SLC_ABORT7, SLC_FLUSHIN0x40|SLC_FLUSHOUT0x20); |
| 950 | initfunc(SLC_EOF8, 0); |
| 951 | initfunc(SLC_SUSP9, SLC_FLUSHIN0x40); |
| 952 | initfunc(SLC_EC10, 0); |
| 953 | initfunc(SLC_EL11, 0); |
| 954 | initfunc(SLC_EW12, 0); |
| 955 | initfunc(SLC_RP13, 0); |
| 956 | initfunc(SLC_LNEXT14, 0); |
| 957 | initfunc(SLC_XON15, 0); |
| 958 | initfunc(SLC_XOFF16, 0); |
| 959 | initfunc(SLC_FORW117, 0); |
| 960 | initfunc(SLC_FORW218, 0); |
| 961 | /* No FORW2 */ |
| 962 | |
| 963 | initfunc(SLC_IP3, SLC_FLUSHIN0x40|SLC_FLUSHOUT0x20); |
| 964 | #undef initfunc |
| 965 | |
| 966 | if (slc_mode == SLC_EXPORT1) |
| 967 | slc_export(); |
| 968 | else |
| 969 | slc_import(1); |
| 970 | |
| 971 | } |
| 972 | |
| 973 | void |
| 974 | slcstate(void) |
| 975 | { |
| 976 | printf("Special characters are %s values\n", |
| 977 | slc_mode == SLC_IMPORT0 ? "remote default" : |
| 978 | slc_mode == SLC_EXPORT1 ? "local" : |
| 979 | "remote"); |
| 980 | } |
| 981 | |
| 982 | void |
| 983 | slc_mode_export(int unused) |
| 984 | { |
| 985 | slc_mode = SLC_EXPORT1; |
| 986 | if (my_state_is_will(TELOPT_LINEMODE)(options[34]&0x01)) |
| 987 | slc_export(); |
| 988 | } |
| 989 | |
| 990 | void |
| 991 | slc_mode_import(int def) |
| 992 | { |
| 993 | slc_mode = def ? SLC_IMPORT0 : SLC_RVALUE2; |
| 994 | if (my_state_is_will(TELOPT_LINEMODE)(options[34]&0x01)) |
| 995 | slc_import(def); |
| 996 | } |
| 997 | |
| 998 | unsigned char slc_import_val[] = { |
| 999 | IAC255, SB250, TELOPT_LINEMODE34, LM_SLC3, 0, SLC_VARIABLE2, 0, IAC255, SE240 |
| 1000 | }; |
| 1001 | unsigned char slc_import_def[] = { |
| 1002 | IAC255, SB250, TELOPT_LINEMODE34, LM_SLC3, 0, SLC_DEFAULT3, 0, IAC255, SE240 |
| 1003 | }; |
| 1004 | |
| 1005 | static void |
| 1006 | slc_import(int def) |
| 1007 | { |
| 1008 | if (NETROOM()(ring_empty_count(&netoring)) > sizeof(slc_import_val)) { |
| 1009 | if (def) { |
| 1010 | ring_supply_data(&netoring, slc_import_def, sizeof(slc_import_def)); |
| 1011 | printsub('>', &slc_import_def[2], sizeof(slc_import_def)-2); |
| 1012 | } else { |
| 1013 | ring_supply_data(&netoring, slc_import_val, sizeof(slc_import_val)); |
| 1014 | printsub('>', &slc_import_val[2], sizeof(slc_import_val)-2); |
| 1015 | } |
| 1016 | } |
| 1017 | /*@*/ else printf("slc_import: not enough room\n"); |
| 1018 | } |
| 1019 | |
| 1020 | static void |
| 1021 | slc_export(void) |
| 1022 | { |
| 1023 | struct spc *spcp; |
| 1024 | |
| 1025 | TerminalDefaultChars(); |
| 1026 | |
| 1027 | slc_start_reply(); |
| 1028 | for (spcp = &spc_data[1]; spcp < &spc_data[NSLC30+1]; spcp++) { |
| 1029 | if (spcp->mylevel != SLC_NOSUPPORT0) { |
| 1030 | if (spcp->val == (cc_t)(_POSIX_VDISABLE(0377))) |
| 1031 | spcp->flags = SLC_NOSUPPORT0; |
| 1032 | else |
| 1033 | spcp->flags = spcp->mylevel; |
| 1034 | if (spcp->valp) |
| 1035 | spcp->val = *spcp->valp; |
| 1036 | slc_add_reply(spcp - spc_data, spcp->flags, spcp->val); |
| 1037 | } |
| 1038 | } |
| 1039 | slc_end_reply(); |
| 1040 | (void)slc_update(); |
| 1041 | setconnmode(1); /* Make sure the character values are set */ |
| 1042 | } |
| 1043 | |
| 1044 | static void |
| 1045 | slc(unsigned char *cp, int len) |
| 1046 | { |
| 1047 | struct spc *spcp; |
| 1048 | int func,level; |
| 1049 | |
| 1050 | slc_start_reply(); |
| 1051 | |
| 1052 | for (; len >= 3; len -=3, cp +=3) { |
| 1053 | |
| 1054 | func = cp[SLC_FUNC0]; |
| 1055 | |
| 1056 | if (func == 0) { |
| 1057 | /* |
| 1058 | * Client side: always ignore 0 function. |
| 1059 | */ |
| 1060 | continue; |
| 1061 | } |
| 1062 | if (func > NSLC30) { |
| 1063 | if ((cp[SLC_FLAGS1] & SLC_LEVELBITS0x03) != SLC_NOSUPPORT0) |
| 1064 | slc_add_reply(func, SLC_NOSUPPORT0, 0); |
| 1065 | continue; |
| 1066 | } |
| 1067 | |
| 1068 | spcp = &spc_data[func]; |
| 1069 | |
| 1070 | level = cp[SLC_FLAGS1]&(SLC_LEVELBITS0x03|SLC_ACK0x80); |
| 1071 | |
| 1072 | if ((cp[SLC_VALUE2] == (unsigned char)spcp->val) && |
| 1073 | ((level&SLC_LEVELBITS0x03) == (spcp->flags&SLC_LEVELBITS0x03))) { |
| 1074 | continue; |
| 1075 | } |
| 1076 | |
| 1077 | if (level == (SLC_DEFAULT3|SLC_ACK0x80)) { |
| 1078 | /* |
| 1079 | * This is an error condition, the SLC_ACK |
| 1080 | * bit should never be set for the SLC_DEFAULT |
| 1081 | * level. Our best guess to recover is to |
| 1082 | * ignore the SLC_ACK bit. |
| 1083 | */ |
| 1084 | cp[SLC_FLAGS1] &= ~SLC_ACK0x80; |
| 1085 | } |
| 1086 | |
| 1087 | if (level == ((spcp->flags&SLC_LEVELBITS0x03)|SLC_ACK0x80)) { |
| 1088 | spcp->val = (cc_t)cp[SLC_VALUE2]; |
| 1089 | spcp->flags = cp[SLC_FLAGS1]; /* include SLC_ACK */ |
| 1090 | continue; |
| 1091 | } |
| 1092 | |
| 1093 | level &= ~SLC_ACK0x80; |
| 1094 | |
| 1095 | if (level <= (spcp->mylevel&SLC_LEVELBITS0x03)) { |
| 1096 | spcp->flags = cp[SLC_FLAGS1]|SLC_ACK0x80; |
| 1097 | spcp->val = (cc_t)cp[SLC_VALUE2]; |
| 1098 | } |
| 1099 | if (level == SLC_DEFAULT3) { |
| 1100 | if ((spcp->mylevel&SLC_LEVELBITS0x03) != SLC_DEFAULT3) |
| 1101 | spcp->flags = spcp->mylevel; |
| 1102 | else |
| 1103 | spcp->flags = SLC_NOSUPPORT0; |
| 1104 | } |
| 1105 | slc_add_reply(func, spcp->flags, spcp->val); |
| 1106 | } |
| 1107 | slc_end_reply(); |
| 1108 | if (slc_update()) |
| 1109 | setconnmode(1); /* set the new character values */ |
| 1110 | } |
| 1111 | |
| 1112 | void |
| 1113 | slc_check(void) |
| 1114 | { |
| 1115 | struct spc *spcp; |
| 1116 | |
| 1117 | slc_start_reply(); |
| 1118 | for (spcp = &spc_data[1]; spcp < &spc_data[NSLC30+1]; spcp++) { |
| 1119 | if (spcp->valp && spcp->val != *spcp->valp) { |
| 1120 | spcp->val = *spcp->valp; |
| 1121 | if (spcp->val == (cc_t)(_POSIX_VDISABLE(0377))) |
| 1122 | spcp->flags = SLC_NOSUPPORT0; |
| 1123 | else |
| 1124 | spcp->flags = spcp->mylevel; |
| 1125 | slc_add_reply(spcp - spc_data, spcp->flags, spcp->val); |
| 1126 | } |
| 1127 | } |
| 1128 | slc_end_reply(); |
| 1129 | setconnmode(1); |
| 1130 | } |
| 1131 | |
| 1132 | |
| 1133 | static unsigned char slc_reply[2 * SUBBUFSIZE256]; |
| 1134 | static unsigned char *slc_replyp; |
| 1135 | |
| 1136 | unsigned char |
| 1137 | slc_add(unsigned char ch) |
| 1138 | { |
| 1139 | if (slc_replyp == slc_reply + sizeof(slc_reply)) |
| 1140 | return ch; |
| 1141 | return *slc_replyp++ = ch; |
| 1142 | } |
| 1143 | |
| 1144 | static void |
| 1145 | slc_start_reply(void) |
| 1146 | { |
| 1147 | slc_replyp = slc_reply; |
| 1148 | slc_add(IAC255); |
| 1149 | slc_add(SB250); |
| 1150 | slc_add(TELOPT_LINEMODE34); |
| 1151 | slc_add(LM_SLC3); |
| 1152 | } |
| 1153 | |
| 1154 | static void |
| 1155 | slc_add_reply(unsigned char func, unsigned char flags, cc_t value) |
| 1156 | { |
| 1157 | if (slc_replyp + 6 >= slc_reply + sizeof(slc_reply)) { |
| 1158 | printf("slc_add_reply: not enough room\n"); |
| 1159 | return; |
| 1160 | } |
| 1161 | if (slc_add(func) == IAC255) |
| 1162 | slc_add(IAC255); |
| 1163 | if (slc_add(flags) == IAC255) |
| 1164 | slc_add(IAC255); |
| 1165 | if (slc_add((unsigned char)value) == IAC255) |
| 1166 | slc_add(IAC255); |
| 1167 | } |
| 1168 | |
| 1169 | static void |
| 1170 | slc_end_reply(void) |
| 1171 | { |
| 1172 | int len; |
| 1173 | |
| 1174 | if (slc_replyp + 2 >= slc_reply + sizeof(slc_reply)) { |
| 1175 | printf("slc_end_reply: not enough room\n"); |
| 1176 | return; |
| 1177 | } |
| 1178 | |
| 1179 | slc_add(IAC255); |
| 1180 | slc_add(SE240); |
| 1181 | len = slc_replyp - slc_reply; |
| 1182 | if (len <= 6) |
| 1183 | return; |
| 1184 | if (NETROOM()(ring_empty_count(&netoring)) > len) { |
| 1185 | ring_supply_data(&netoring, slc_reply, slc_replyp - slc_reply); |
| 1186 | printsub('>', &slc_reply[2], slc_replyp - slc_reply - 2); |
| 1187 | } |
| 1188 | /*@*/else printf("slc_end_reply: not enough room\n"); |
| 1189 | } |
| 1190 | |
| 1191 | static int |
| 1192 | slc_update(void) |
| 1193 | { |
| 1194 | struct spc *spcp; |
| 1195 | int need_update = 0; |
| 1196 | |
| 1197 | for (spcp = &spc_data[1]; spcp < &spc_data[NSLC30+1]; spcp++) { |
| 1198 | if (!(spcp->flags&SLC_ACK0x80)) |
| 1199 | continue; |
| 1200 | spcp->flags &= ~SLC_ACK0x80; |
| 1201 | if (spcp->valp && (*spcp->valp != spcp->val)) { |
| 1202 | *spcp->valp = spcp->val; |
| 1203 | need_update = 1; |
| 1204 | } |
| 1205 | } |
| 1206 | return(need_update); |
| 1207 | } |
| 1208 | |
| 1209 | static void |
| 1210 | env_opt(char *buf, int len) |
| 1211 | { |
| 1212 | char *ep = 0, *epc = 0; |
| 1213 | int i; |
| 1214 | |
| 1215 | switch(buf[0]&0xff) { |
| 1216 | case TELQUAL_SEND1: |
| 1217 | env_opt_start(); |
| 1218 | if (len == 1) { |
| 1219 | env_opt_add(NULL((void *)0)); |
| 1220 | } else for (i = 1; i < len; i++) { |
| 1221 | switch (buf[i]&0xff) { |
| 1222 | case NEW_ENV_VAR0: |
| 1223 | case ENV_USERVAR3: |
| 1224 | if (ep) { |
| 1225 | *epc = 0; |
| 1226 | env_opt_add(ep); |
| 1227 | } |
| 1228 | ep = epc = &buf[i+1]; |
| 1229 | break; |
| 1230 | case ENV_ESC2: |
| 1231 | i++; |
| 1232 | /*FALL THROUGH*/ |
| 1233 | default: |
| 1234 | if (epc) |
| 1235 | *epc++ = buf[i]; |
| 1236 | break; |
| 1237 | } |
| 1238 | } |
| 1239 | if (ep) { |
| 1240 | *epc = 0; |
| 1241 | env_opt_add(ep); |
| 1242 | } |
| 1243 | env_opt_end(1); |
| 1244 | break; |
| 1245 | |
| 1246 | case TELQUAL_IS0: |
| 1247 | case TELQUAL_INFO2: |
| 1248 | /* Ignore for now. We shouldn't get it anyway. */ |
| 1249 | break; |
| 1250 | |
| 1251 | default: |
| 1252 | break; |
| 1253 | } |
| 1254 | } |
| 1255 | |
| 1256 | #define OPT_REPLY_SIZE(2 * 256) (2 * SUBBUFSIZE256) |
| 1257 | static unsigned char *opt_reply; |
| 1258 | static unsigned char *opt_replyp; |
| 1259 | static unsigned char *opt_replyend; |
| 1260 | |
| 1261 | void |
| 1262 | opt_add(unsigned char ch) |
| 1263 | { |
| 1264 | if (opt_replyp == opt_replyend) |
| 1265 | return; |
| 1266 | *opt_replyp++ = ch; |
| 1267 | } |
| 1268 | |
| 1269 | static void |
| 1270 | env_opt_start(void) |
| 1271 | { |
| 1272 | unsigned char *p; |
| 1273 | |
| 1274 | p = realloc(opt_reply, OPT_REPLY_SIZE(2 * 256)); |
| 1275 | if (p == NULL((void *)0)) |
| 1276 | free(opt_reply); |
| 1277 | opt_reply = p; |
| 1278 | if (opt_reply == NULL((void *)0)) { |
| 1279 | /*@*/ printf("env_opt_start: realloc() failed!!!\n"); |
| 1280 | opt_reply = opt_replyp = opt_replyend = NULL((void *)0); |
| 1281 | return; |
| 1282 | } |
| 1283 | opt_replyp = opt_reply; |
| 1284 | opt_replyend = opt_reply + OPT_REPLY_SIZE(2 * 256); |
| 1285 | opt_add(IAC255); |
| 1286 | opt_add(SB250); |
| 1287 | opt_add(telopt_environ39); |
| 1288 | opt_add(TELQUAL_IS0); |
| 1289 | } |
| 1290 | |
| 1291 | void |
| 1292 | env_opt_start_info(void) |
| 1293 | { |
| 1294 | env_opt_start(); |
| 1295 | if (opt_replyp) |
| 1296 | opt_replyp[-1] = TELQUAL_INFO2; |
| 1297 | } |
| 1298 | |
| 1299 | void |
| 1300 | env_opt_add(char *ep) |
| 1301 | { |
| 1302 | char *vp, c; |
| 1303 | |
| 1304 | if (opt_reply == NULL((void *)0)) /*XXX*/ |
| 1305 | return; /*XXX*/ |
| 1306 | |
| 1307 | if (ep == NULL((void *)0) || *ep == '\0') { |
| 1308 | /* Send user defined variables first. */ |
| 1309 | env_default(1, 0); |
| 1310 | while ((ep = env_default(0, 0))) |
| 1311 | env_opt_add(ep); |
| 1312 | |
| 1313 | /* Now add the list of well know variables. */ |
| 1314 | env_default(1, 1); |
| 1315 | while ((ep = env_default(0, 1))) |
| 1316 | env_opt_add(ep); |
| 1317 | return; |
| 1318 | } |
| 1319 | vp = env_getvalue(ep, 1); |
| 1320 | if (2 * (vp ? strlen(vp) : 0) + 2 * strlen(ep) + 6 > |
| 1321 | opt_replyend - opt_replyp) |
| 1322 | { |
| 1323 | size_t len; |
| 1324 | unsigned char *p; |
| 1325 | |
| 1326 | len = opt_replyend - opt_reply; |
| 1327 | len += OPT_REPLY_SIZE(2 * 256) + 2 * strlen(ep); |
| 1328 | if (vp) |
| 1329 | len += 2 * strlen(vp); |
| 1330 | p = realloc(opt_reply, len); |
| 1331 | if (p == NULL((void *)0)) { |
| 1332 | free(opt_reply); |
| 1333 | /*@*/ printf("env_opt_add: realloc() failed!!!\n"); |
| 1334 | opt_reply = opt_replyp = opt_replyend = NULL((void *)0); |
| 1335 | return; |
| 1336 | } |
| 1337 | opt_replyp = p + (opt_replyp - opt_reply); |
| 1338 | opt_replyend = p + len; |
| 1339 | opt_reply = p; |
| 1340 | } |
| 1341 | if (opt_welldefined(ep)) |
| 1342 | opt_add(NEW_ENV_VAR0); |
| 1343 | else |
| 1344 | opt_add(ENV_USERVAR3); |
| 1345 | |
| 1346 | for (;;) { |
| 1347 | while ((c = *ep++)) { |
| 1348 | switch(c&0xff) { |
| 1349 | case IAC255: |
| 1350 | opt_add(IAC255); |
| 1351 | break; |
| 1352 | case NEW_ENV_VAR0: |
| 1353 | case NEW_ENV_VALUE1: |
| 1354 | case ENV_ESC2: |
| 1355 | case ENV_USERVAR3: |
| 1356 | opt_add(ENV_ESC2); |
| 1357 | break; |
| 1358 | } |
| 1359 | opt_add(c); |
| 1360 | } |
| 1361 | if ((ep = vp)) { |
| 1362 | opt_add(NEW_ENV_VALUE1); |
| 1363 | vp = NULL((void *)0); |
| 1364 | } else |
| 1365 | break; |
| 1366 | } |
| 1367 | } |
| 1368 | |
| 1369 | int |
| 1370 | opt_welldefined(const char *ep) |
| 1371 | { |
| 1372 | if ((strcmp(ep, "USER") == 0) || |
| 1373 | (strcmp(ep, "DISPLAY") == 0) || |
| 1374 | (strcmp(ep, "PRINTER") == 0) || |
| 1375 | (strcmp(ep, "SYSTEMTYPE") == 0) || |
| 1376 | (strcmp(ep, "JOB") == 0) || |
| 1377 | (strcmp(ep, "ACCT") == 0)) |
| 1378 | return(1); |
| 1379 | return(0); |
| 1380 | } |
| 1381 | |
| 1382 | void |
| 1383 | env_opt_end(int emptyok) |
| 1384 | { |
| 1385 | int len; |
| 1386 | |
| 1387 | len = opt_replyp - opt_reply + 2; |
| 1388 | if (emptyok || len > 6) { |
| 1389 | opt_add(IAC255); |
| 1390 | opt_add(SE240); |
| 1391 | if (NETROOM()(ring_empty_count(&netoring)) > len) { |
| 1392 | ring_supply_data(&netoring, opt_reply, len); |
| 1393 | printsub('>', &opt_reply[2], len - 2); |
| 1394 | } |
| 1395 | /*@*/ else printf("slc_end_reply: not enough room\n"); |
| 1396 | } |
| 1397 | if (opt_reply) { |
| 1398 | free(opt_reply); |
| 1399 | opt_reply = opt_replyp = opt_replyend = NULL((void *)0); |
| 1400 | } |
| 1401 | } |
| 1402 | |
| 1403 | |
| 1404 | |
| 1405 | int |
| 1406 | telrcv(void) |
| 1407 | { |
| 1408 | int c; |
| 1409 | int scc; |
| 1410 | unsigned char *sbp; |
| 1411 | int count; |
| 1412 | int returnValue = 0; |
| 1413 | |
| 1414 | scc = 0; |
| 1415 | count = 0; |
| 1416 | while (TTYROOM()(ring_empty_count(&ttyoring)) > 2) { |
| 1417 | if (scc == 0) { |
| 1418 | if (count) { |
| 1419 | ring_consumed(&netiring, count); |
| 1420 | returnValue = 1; |
| 1421 | count = 0; |
| 1422 | } |
| 1423 | sbp = netiring.consume; |
| 1424 | scc = ring_full_consecutive(&netiring); |
| 1425 | if (scc == 0) { |
| 1426 | /* No more data coming in */ |
| 1427 | break; |
| 1428 | } |
| 1429 | } |
| 1430 | |
| 1431 | c = *sbp++ & 0xff, scc--; count++; |
| 1432 | |
| 1433 | switch (telrcv_state) { |
| 1434 | |
| 1435 | case TS_CR6: |
| 1436 | telrcv_state = TS_DATA0; |
| 1437 | if (c == '\0') { |
| 1438 | break; /* Ignore \0 after CR */ |
| 1439 | } |
| 1440 | else if ((c == '\n') && my_want_state_is_dont(TELOPT_ECHO)(!(options[1]&0x08)) && !crmod) { |
| 1441 | TTYADD(c)if (!(SYNCHing||flushout)) { *ttyoring.supply = c; ring_supplied (&ttyoring, 1); }; |
| 1442 | break; |
| 1443 | } |
| 1444 | /* Else, fall through */ |
| 1445 | |
| 1446 | case TS_DATA0: |
| 1447 | if (c == IAC255) { |
| 1448 | telrcv_state = TS_IAC1; |
| 1449 | break; |
| 1450 | } |
| 1451 | /* |
| 1452 | * The 'crmod' hack (see following) is needed |
| 1453 | * since we can't set CRMOD on output only. |
| 1454 | * Machines like MULTICS like to send \r without |
| 1455 | * \n; since we must turn off CRMOD to get proper |
| 1456 | * input, the mapping is done here (sigh). |
| 1457 | */ |
| 1458 | if ((c == '\r') && my_want_state_is_dont(TELOPT_BINARY)(!(options[0]&0x08))) { |
| 1459 | if (scc > 0) { |
| 1460 | c = *sbp&0xff; |
| 1461 | if (c == 0) { |
| 1462 | sbp++, scc--; count++; |
| 1463 | /* a "true" CR */ |
| 1464 | TTYADD('\r')if (!(SYNCHing||flushout)) { *ttyoring.supply = '\r'; ring_supplied (&ttyoring, 1); }; |
| 1465 | } else if (my_want_state_is_dont(TELOPT_ECHO)(!(options[1]&0x08)) && |
| 1466 | (c == '\n')) { |
| 1467 | sbp++, scc--; count++; |
| 1468 | TTYADD('\n')if (!(SYNCHing||flushout)) { *ttyoring.supply = '\n'; ring_supplied (&ttyoring, 1); }; |
| 1469 | } else { |
| 1470 | TTYADD('\r')if (!(SYNCHing||flushout)) { *ttyoring.supply = '\r'; ring_supplied (&ttyoring, 1); }; |
| 1471 | if (crmod) { |
| 1472 | TTYADD('\n')if (!(SYNCHing||flushout)) { *ttyoring.supply = '\n'; ring_supplied (&ttyoring, 1); }; |
| 1473 | } |
| 1474 | } |
| 1475 | } else { |
| 1476 | telrcv_state = TS_CR6; |
| 1477 | TTYADD('\r')if (!(SYNCHing||flushout)) { *ttyoring.supply = '\r'; ring_supplied (&ttyoring, 1); }; |
| 1478 | if (crmod) { |
| 1479 | TTYADD('\n')if (!(SYNCHing||flushout)) { *ttyoring.supply = '\n'; ring_supplied (&ttyoring, 1); }; |
| 1480 | } |
| 1481 | } |
| 1482 | } else { |
| 1483 | TTYADD(c)if (!(SYNCHing||flushout)) { *ttyoring.supply = c; ring_supplied (&ttyoring, 1); }; |
| 1484 | } |
| 1485 | continue; |
| 1486 | |
| 1487 | case TS_IAC1: |
| 1488 | process_iac: |
| 1489 | switch (c) { |
| 1490 | |
| 1491 | case WILL251: |
| 1492 | telrcv_state = TS_WILL2; |
| 1493 | continue; |
| 1494 | |
| 1495 | case WONT252: |
| 1496 | telrcv_state = TS_WONT3; |
| 1497 | continue; |
| 1498 | |
| 1499 | case DO253: |
| 1500 | telrcv_state = TS_DO4; |
| 1501 | continue; |
| 1502 | |
| 1503 | case DONT254: |
| 1504 | telrcv_state = TS_DONT5; |
| 1505 | continue; |
| 1506 | |
| 1507 | case DM242: |
| 1508 | /* |
| 1509 | * We may have missed an urgent notification, |
| 1510 | * so make sure we flush whatever is in the |
| 1511 | * buffer currently. |
| 1512 | */ |
| 1513 | printoption("RCVD", IAC255, DM242); |
| 1514 | SYNCHing = 1; |
| 1515 | (void) ttyflush(1); |
| 1516 | SYNCHing = stilloob(); |
| 1517 | break; |
| 1518 | |
| 1519 | case SB250: |
| 1520 | SB_CLEAR()subpointer = subbuffer;; |
| 1521 | telrcv_state = TS_SB7; |
| 1522 | continue; |
| 1523 | |
| 1524 | case IAC255: |
| 1525 | TTYADD(IAC)if (!(SYNCHing||flushout)) { *ttyoring.supply = 255; ring_supplied (&ttyoring, 1); }; |
| 1526 | break; |
| 1527 | |
| 1528 | case NOP241: |
| 1529 | case GA249: |
| 1530 | default: |
| 1531 | printoption("RCVD", IAC255, c); |
| 1532 | break; |
| 1533 | } |
| 1534 | telrcv_state = TS_DATA0; |
| 1535 | continue; |
| 1536 | |
| 1537 | case TS_WILL2: |
| 1538 | printoption("RCVD", WILL251, c); |
| 1539 | willoption(c); |
| 1540 | telrcv_state = TS_DATA0; |
| 1541 | continue; |
| 1542 | |
| 1543 | case TS_WONT3: |
| 1544 | printoption("RCVD", WONT252, c); |
| 1545 | wontoption(c); |
| 1546 | telrcv_state = TS_DATA0; |
| 1547 | continue; |
| 1548 | |
| 1549 | case TS_DO4: |
| 1550 | printoption("RCVD", DO253, c); |
| 1551 | dooption(c); |
| 1552 | if (c == TELOPT_NAWS31) { |
| 1553 | sendnaws(); |
| 1554 | } else if (c == TELOPT_LFLOW33) { |
| 1555 | localflow = 1; |
| 1556 | setcommandmode(); |
| 1557 | setconnmode(0); |
| 1558 | } |
| 1559 | telrcv_state = TS_DATA0; |
| 1560 | continue; |
| 1561 | |
| 1562 | case TS_DONT5: |
| 1563 | printoption("RCVD", DONT254, c); |
| 1564 | dontoption(c); |
| 1565 | flushline = 1; |
| 1566 | setconnmode(0); /* set new tty mode (maybe) */ |
| 1567 | telrcv_state = TS_DATA0; |
| 1568 | continue; |
| 1569 | |
| 1570 | case TS_SB7: |
| 1571 | if (c == IAC255) { |
| 1572 | telrcv_state = TS_SE8; |
| 1573 | } else { |
| 1574 | SB_ACCUM(c)if (subpointer < (subbuffer+sizeof subbuffer)) { *subpointer ++ = (c); }; |
| 1575 | } |
| 1576 | continue; |
| 1577 | |
| 1578 | case TS_SE8: |
| 1579 | if (c != SE240) { |
| 1580 | if (c != IAC255) { |
| 1581 | /* |
| 1582 | * This is an error. We only expect to get |
| 1583 | * "IAC IAC" or "IAC SE". Several things may |
| 1584 | * have happened. An IAC was not doubled, the |
| 1585 | * IAC SE was left off, or another option got |
| 1586 | * inserted into the suboption are all possibilities. |
| 1587 | * If we assume that the IAC was not doubled, |
| 1588 | * and really the IAC SE was left off, we could |
| 1589 | * get into an infinite loop here. So, instead, |
| 1590 | * we terminate the suboption, and process the |
| 1591 | * partial suboption if we can. |
| 1592 | */ |
| 1593 | SB_ACCUM(IAC)if (subpointer < (subbuffer+sizeof subbuffer)) { *subpointer ++ = (255); }; |
| 1594 | SB_ACCUM(c)if (subpointer < (subbuffer+sizeof subbuffer)) { *subpointer ++ = (c); }; |
| 1595 | subpointer -= 2; |
| 1596 | SB_TERM(){ subend = subpointer; subpointer = subbuffer;; }; |
| 1597 | |
| 1598 | printoption("In SUBOPTION processing, RCVD", IAC255, c); |
| 1599 | suboption(); /* handle sub-option */ |
| 1600 | telrcv_state = TS_IAC1; |
| 1601 | goto process_iac; |
| 1602 | } |
| 1603 | SB_ACCUM(c)if (subpointer < (subbuffer+sizeof subbuffer)) { *subpointer ++ = (c); }; |
| 1604 | telrcv_state = TS_SB7; |
| 1605 | } else { |
| 1606 | SB_ACCUM(IAC)if (subpointer < (subbuffer+sizeof subbuffer)) { *subpointer ++ = (255); }; |
| 1607 | SB_ACCUM(SE)if (subpointer < (subbuffer+sizeof subbuffer)) { *subpointer ++ = (240); }; |
| 1608 | subpointer -= 2; |
| 1609 | SB_TERM(){ subend = subpointer; subpointer = subbuffer;; }; |
| 1610 | suboption(); /* handle sub-option */ |
| 1611 | telrcv_state = TS_DATA0; |
| 1612 | } |
| 1613 | } |
| 1614 | } |
| 1615 | if (count) |
| 1616 | ring_consumed(&netiring, count); |
| 1617 | return returnValue||count; |
| 1618 | } |
| 1619 | |
| 1620 | static int bol = 1, local = 0; |
| 1621 | |
| 1622 | int |
| 1623 | rlogin_susp(void) |
| 1624 | { |
| 1625 | if (local) { |
| 1626 | local = 0; |
| 1627 | bol = 1; |
| 1628 | command(0, "z\n", 2); |
| 1629 | return(1); |
| 1630 | } |
| 1631 | return(0); |
| 1632 | } |
| 1633 | |
| 1634 | static int |
| 1635 | telsnd(void) |
| 1636 | { |
| 1637 | int tcc; |
| 1638 | int count; |
| 1639 | int returnValue = 0; |
| 1640 | unsigned char *tbp; |
| 1641 | |
| 1642 | tcc = 0; |
| 1643 | count = 0; |
| 1644 | while (NETROOM()(ring_empty_count(&netoring)) > 2) { |
| 1645 | int sc; |
| 1646 | int c; |
| 1647 | |
| 1648 | if (tcc == 0) { |
| 1649 | if (count) { |
| 1650 | ring_consumed(&ttyiring, count); |
| 1651 | returnValue = 1; |
| 1652 | count = 0; |
| 1653 | } |
| 1654 | tbp = ttyiring.consume; |
| 1655 | tcc = ring_full_consecutive(&ttyiring); |
| 1656 | if (tcc == 0) { |
| 1657 | break; |
| 1658 | } |
| 1659 | } |
| 1660 | c = *tbp++ & 0xff, sc = strip(c)(eight ? (c) : ((c) & 0x7f)), tcc--; count++; |
| 1661 | if (rlogin != _POSIX_VDISABLE(0377)) { |
| 1662 | if (bol) { |
| 1663 | bol = 0; |
| 1664 | if (sc == rlogin) { |
| 1665 | local = 1; |
| 1666 | continue; |
| 1667 | } |
| 1668 | } else if (local) { |
| 1669 | local = 0; |
| 1670 | if (sc == '.' || c == termEofCharnew_tc.c_cc[0]) { |
| 1671 | bol = 1; |
| 1672 | command(0, "close\n", 6); |
| 1673 | continue; |
| 1674 | } |
| 1675 | if (sc == termSuspCharnew_tc.c_cc[10]) { |
| 1676 | bol = 1; |
| 1677 | command(0, "z\n", 2); |
| 1678 | continue; |
| 1679 | } |
| 1680 | if (sc == escape) { |
| 1681 | command(0, (char *)tbp, tcc); |
| 1682 | bol = 1; |
| 1683 | count += tcc; |
| 1684 | tcc = 0; |
| 1685 | flushline = 1; |
| 1686 | break; |
| 1687 | } |
| 1688 | if (sc != rlogin) { |
| 1689 | ++tcc; |
| 1690 | --tbp; |
| 1691 | --count; |
| 1692 | c = sc = rlogin; |
| 1693 | } |
| 1694 | } |
| 1695 | if ((sc == '\n') || (sc == '\r')) |
| 1696 | bol = 1; |
| 1697 | } else if (escape != _POSIX_VDISABLE(0377) && sc == escape) { |
| 1698 | /* |
| 1699 | * Double escape is a pass through of a single escape character. |
| 1700 | */ |
| 1701 | if (tcc && strip(*tbp)(eight ? (*tbp) : ((*tbp) & 0x7f)) == escape) { |
| 1702 | tbp++; |
| 1703 | tcc--; |
| 1704 | count++; |
| 1705 | bol = 0; |
| 1706 | } else { |
| 1707 | command(0, (char *)tbp, tcc); |
| 1708 | bol = 1; |
| 1709 | count += tcc; |
| 1710 | tcc = 0; |
Value stored to 'tcc' is never read | |
| 1711 | flushline = 1; |
| 1712 | break; |
| 1713 | } |
| 1714 | } else |
| 1715 | bol = 0; |
| 1716 | #ifdef KLUDGELINEMODE1 |
| 1717 | if (kludgelinemode && (globalmode&MODE_EDIT0x01) && (sc == echoc)) { |
| 1718 | if (tcc > 0 && strip(*tbp)(eight ? (*tbp) : ((*tbp) & 0x7f)) == echoc) { |
| 1719 | tcc--; tbp++; count++; |
| 1720 | } else { |
| 1721 | dontlecho = !dontlecho; |
| 1722 | settimer(echotoggle)clocks.echotoggle = clocks.system++; |
| 1723 | setconnmode(0); |
| 1724 | flushline = 1; |
| 1725 | break; |
| 1726 | } |
| 1727 | } |
| 1728 | #endif |
| 1729 | if (sc != _POSIX_VDISABLE(0377) && MODE_LOCAL_CHARS(globalmode)((globalmode)&(0x01|0x02))) { |
| 1730 | if (TerminalSpecialChars(sc) == 0) { |
| 1731 | bol = 1; |
| 1732 | break; |
| 1733 | } |
| 1734 | } |
| 1735 | if (my_want_state_is_wont(TELOPT_BINARY)(!(options[0]&0x02))) { |
| 1736 | switch (c) { |
| 1737 | case '\n': |
| 1738 | /* |
| 1739 | * If we are in CRMOD mode (\r ==> \n) |
| 1740 | * on our local machine, then probably |
| 1741 | * a newline (unix) is CRLF (TELNET). |
| 1742 | */ |
| 1743 | if (MODE_LOCAL_CHARS(globalmode)((globalmode)&(0x01|0x02))) { |
| 1744 | NETADD('\r'){ *netoring.supply = '\r'; ring_supplied(&netoring, 1); }; |
| 1745 | } |
| 1746 | NETADD('\n'){ *netoring.supply = '\n'; ring_supplied(&netoring, 1); }; |
| 1747 | bol = flushline = 1; |
| 1748 | break; |
| 1749 | case '\r': |
| 1750 | if (!crlf) { |
| 1751 | NET2ADD('\r', '\0'){ { *netoring.supply = '\r'; ring_supplied(&netoring, 1); }; { *netoring.supply = '\0'; ring_supplied(&netoring, 1 ); }; }; |
| 1752 | } else { |
| 1753 | NET2ADD('\r', '\n'){ { *netoring.supply = '\r'; ring_supplied(&netoring, 1); }; { *netoring.supply = '\n'; ring_supplied(&netoring, 1 ); }; }; |
| 1754 | } |
| 1755 | bol = flushline = 1; |
| 1756 | break; |
| 1757 | case IAC255: |
| 1758 | NET2ADD(IAC, IAC){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; }; |
| 1759 | break; |
| 1760 | default: |
| 1761 | NETADD(c){ *netoring.supply = c; ring_supplied(&netoring, 1); }; |
| 1762 | break; |
| 1763 | } |
| 1764 | } else if (c == IAC255) { |
| 1765 | NET2ADD(IAC, IAC){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; }; |
| 1766 | } else { |
| 1767 | NETADD(c){ *netoring.supply = c; ring_supplied(&netoring, 1); }; |
| 1768 | } |
| 1769 | } |
| 1770 | if (count) |
| 1771 | ring_consumed(&ttyiring, count); |
| 1772 | return returnValue||count; /* Non-zero if we did anything */ |
| 1773 | } |
| 1774 | |
| 1775 | /* |
| 1776 | * Scheduler() |
| 1777 | * |
| 1778 | * Try to do something. |
| 1779 | * |
| 1780 | * If we do something useful, return 1; else return 0. |
| 1781 | * |
| 1782 | */ |
| 1783 | |
| 1784 | int |
| 1785 | Scheduler(int block) /* should we block in the select ? */ |
| 1786 | { |
| 1787 | /* One wants to be a bit careful about setting returnValue |
| 1788 | * to one, since a one implies we did some useful work, |
| 1789 | * and therefore probably won't be called to block next |
| 1790 | * time (TN3270 mode only). |
| 1791 | */ |
| 1792 | int returnValue; |
| 1793 | int netin, netout, netex, ttyin, ttyout; |
| 1794 | |
| 1795 | /* Decide which rings should be processed */ |
| 1796 | |
| 1797 | netout = ring_full_count(&netoring) && |
| 1798 | (flushline || |
| 1799 | (my_want_state_is_wont(TELOPT_LINEMODE)(!(options[34]&0x02)) |
| 1800 | #ifdef KLUDGELINEMODE1 |
| 1801 | && (!kludgelinemode || my_want_state_is_do(TELOPT_SGA)(options[3]&0x08)) |
| 1802 | #endif |
| 1803 | ) || |
| 1804 | my_want_state_is_will(TELOPT_BINARY)(options[0]&0x02)); |
| 1805 | ttyout = ring_full_count(&ttyoring); |
| 1806 | |
| 1807 | ttyin = ring_empty_count(&ttyiring) && (clienteof == 0); |
| 1808 | |
| 1809 | netin = !ISend && ring_empty_count(&netiring); |
| 1810 | |
| 1811 | netex = !SYNCHing; |
| 1812 | |
| 1813 | /* If we have seen a signal recently, reset things */ |
| 1814 | |
| 1815 | if (scheduler_lockout_tty) { |
| 1816 | ttyin = ttyout = 0; |
| 1817 | } |
| 1818 | |
| 1819 | /* Call to system code to process rings */ |
| 1820 | |
| 1821 | returnValue = process_rings(netin, netout, netex, ttyin, ttyout, !block); |
| 1822 | |
| 1823 | /* Now, look at the input rings, looking for work to do. */ |
| 1824 | |
| 1825 | if (ring_full_count(&ttyiring)) { |
| 1826 | returnValue |= telsnd(); |
| 1827 | } |
| 1828 | |
| 1829 | if (ring_full_count(&netiring)) { |
| 1830 | returnValue |= telrcv(); |
| 1831 | } |
| 1832 | return returnValue; |
| 1833 | } |
| 1834 | |
| 1835 | /* |
| 1836 | * Select from tty and network... |
| 1837 | */ |
| 1838 | void |
| 1839 | telnet(char *user) |
| 1840 | { |
| 1841 | connections++; |
| 1842 | sys_telnet_init(); |
| 1843 | |
| 1844 | if (pledge("stdio rpath tty", NULL((void *)0)) == -1) { |
| 1845 | perror("pledge"); |
| 1846 | exit(1); |
| 1847 | } |
| 1848 | |
| 1849 | if (telnetport) { |
| 1850 | send_do(TELOPT_SGA3, 1); |
| 1851 | send_will(TELOPT_TTYPE24, 1); |
| 1852 | send_will(TELOPT_NAWS31, 1); |
| 1853 | send_will(TELOPT_TSPEED32, 1); |
| 1854 | send_will(TELOPT_LFLOW33, 1); |
| 1855 | send_will(TELOPT_LINEMODE34, 1); |
| 1856 | send_will(TELOPT_NEW_ENVIRON39, 1); |
| 1857 | send_do(TELOPT_STATUS5, 1); |
| 1858 | if (env_getvalue("DISPLAY", 0)) |
| 1859 | send_will(TELOPT_XDISPLOC35, 1); |
| 1860 | if (binary) |
| 1861 | tel_enter_binary(binary); |
| 1862 | } |
| 1863 | |
| 1864 | for (;;) { |
| 1865 | int schedValue; |
| 1866 | |
| 1867 | while ((schedValue = Scheduler(0)) != 0) { |
| 1868 | if (schedValue == -1) { |
| 1869 | setcommandmode(); |
| 1870 | return; |
| 1871 | } |
| 1872 | } |
| 1873 | |
| 1874 | if (Scheduler(1) == -1) { |
| 1875 | setcommandmode(); |
| 1876 | return; |
| 1877 | } |
| 1878 | } |
| 1879 | } |
| 1880 | |
| 1881 | #if 0 /* XXX - this not being in is a bug */ |
| 1882 | /* |
| 1883 | * nextitem() |
| 1884 | * |
| 1885 | * Return the address of the next "item" in the TELNET data |
| 1886 | * stream. This will be the address of the next character if |
| 1887 | * the current address is a user data character, or it will |
| 1888 | * be the address of the character following the TELNET command |
| 1889 | * if the current address is a TELNET IAC ("I Am a Command") |
| 1890 | * character. |
| 1891 | */ |
| 1892 | |
| 1893 | static char * |
| 1894 | nextitem(char *current) |
| 1895 | { |
| 1896 | if ((*current&0xff) != IAC255) { |
| 1897 | return current+1; |
| 1898 | } |
| 1899 | switch (*(current+1)&0xff) { |
| 1900 | case DO253: |
| 1901 | case DONT254: |
| 1902 | case WILL251: |
| 1903 | case WONT252: |
| 1904 | return current+3; |
| 1905 | case SB250: /* loop forever looking for the SE */ |
| 1906 | { |
| 1907 | char *look = current+2; |
| 1908 | |
| 1909 | for (;;) { |
| 1910 | if ((*look++&0xff) == IAC255) { |
| 1911 | if ((*look++&0xff) == SE240) { |
| 1912 | return look; |
| 1913 | } |
| 1914 | } |
| 1915 | } |
| 1916 | } |
| 1917 | default: |
| 1918 | return current+2; |
| 1919 | } |
| 1920 | } |
| 1921 | #endif /* 0 */ |
| 1922 | |
| 1923 | /* |
| 1924 | * netclear() |
| 1925 | * |
| 1926 | * We are about to do a TELNET SYNCH operation. Clear |
| 1927 | * the path to the network. |
| 1928 | * |
| 1929 | * Things are a bit tricky since we may have sent the first |
| 1930 | * byte or so of a previous TELNET command into the network. |
| 1931 | * So, we have to scan the network buffer from the beginning |
| 1932 | * until we are up to where we want to be. |
| 1933 | * |
| 1934 | * A side effect of what we do, just to keep things |
| 1935 | * simple, is to clear the urgent data pointer. The principal |
| 1936 | * caller should be setting the urgent data pointer AFTER calling |
| 1937 | * us in any case. |
| 1938 | */ |
| 1939 | |
| 1940 | static void |
| 1941 | netclear(void) |
| 1942 | { |
| 1943 | #if 0 /* XXX */ |
| 1944 | char *thisitem, *next; |
| 1945 | char *good; |
| 1946 | #define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC255) && \ |
| 1947 | ((*(p+1)&0xff) != EC247) && ((*(p+1)&0xff) != EL248)) |
| 1948 | |
| 1949 | thisitem = netobuf; |
| 1950 | |
| 1951 | while ((next = nextitem(thisitem)) <= netobuf.send) { |
| 1952 | thisitem = next; |
| 1953 | } |
| 1954 | |
| 1955 | /* Now, thisitem is first before/at boundary. */ |
| 1956 | |
| 1957 | good = netobuf; /* where the good bytes go */ |
| 1958 | |
| 1959 | while (netoring.add > thisitem) { |
| 1960 | if (wewant(thisitem)) { |
| 1961 | int length; |
| 1962 | |
| 1963 | next = thisitem; |
| 1964 | do { |
| 1965 | next = nextitem(next); |
| 1966 | } while (wewant(next) && (nfrontp > next)); |
| 1967 | length = next-thisitem; |
| 1968 | memmove(good, thisitem, length); |
| 1969 | good += length; |
| 1970 | thisitem = next; |
| 1971 | } else { |
| 1972 | thisitem = nextitem(thisitem); |
| 1973 | } |
| 1974 | } |
| 1975 | |
| 1976 | #endif /* 0 */ |
| 1977 | } |
| 1978 | |
| 1979 | /* |
| 1980 | * These routines add various telnet commands to the data stream. |
| 1981 | */ |
| 1982 | |
| 1983 | static void |
| 1984 | doflush(void) |
| 1985 | { |
| 1986 | NET2ADD(IAC, DO){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 253; ring_supplied(&netoring, 1); } ; }; |
| 1987 | NETADD(TELOPT_TM){ *netoring.supply = 6; ring_supplied(&netoring, 1); }; |
| 1988 | flushline = 1; |
| 1989 | flushout = 1; |
| 1990 | (void) ttyflush(1); /* Flush/drop output */ |
| 1991 | /* do printoption AFTER flush, otherwise the output gets tossed... */ |
| 1992 | printoption("SENT", DO253, TELOPT_TM6); |
| 1993 | } |
| 1994 | |
| 1995 | void |
| 1996 | xmitAO(void) |
| 1997 | { |
| 1998 | NET2ADD(IAC, AO){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 245; ring_supplied(&netoring, 1); } ; }; |
| 1999 | printoption("SENT", IAC255, AO245); |
| 2000 | if (autoflush) { |
| 2001 | doflush(); |
| 2002 | } |
| 2003 | } |
| 2004 | |
| 2005 | |
| 2006 | void |
| 2007 | xmitEL(void) |
| 2008 | { |
| 2009 | NET2ADD(IAC, EL){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 248; ring_supplied(&netoring, 1); } ; }; |
| 2010 | printoption("SENT", IAC255, EL248); |
| 2011 | } |
| 2012 | |
| 2013 | void |
| 2014 | xmitEC(void) |
| 2015 | { |
| 2016 | NET2ADD(IAC, EC){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 247; ring_supplied(&netoring, 1); } ; }; |
| 2017 | printoption("SENT", IAC255, EC247); |
| 2018 | } |
| 2019 | |
| 2020 | |
| 2021 | int |
| 2022 | dosynch(void) |
| 2023 | { |
| 2024 | netclear(); /* clear the path to the network */ |
| 2025 | NETADD(IAC){ *netoring.supply = 255; ring_supplied(&netoring, 1); }; |
| 2026 | setneturg(); |
| 2027 | NETADD(DM){ *netoring.supply = 242; ring_supplied(&netoring, 1); }; |
| 2028 | printoption("SENT", IAC255, DM242); |
| 2029 | return 1; |
| 2030 | } |
| 2031 | |
| 2032 | int want_status_response = 0; |
| 2033 | |
| 2034 | int |
| 2035 | get_status(void) |
| 2036 | { |
| 2037 | unsigned char tmp[16]; |
| 2038 | unsigned char *cp; |
| 2039 | |
| 2040 | if (my_want_state_is_dont(TELOPT_STATUS)(!(options[5]&0x08))) { |
| 2041 | printf("Remote side does not support STATUS option\n"); |
| 2042 | return 0; |
| 2043 | } |
| 2044 | cp = tmp; |
| 2045 | |
| 2046 | *cp++ = IAC255; |
| 2047 | *cp++ = SB250; |
| 2048 | *cp++ = TELOPT_STATUS5; |
| 2049 | *cp++ = TELQUAL_SEND1; |
| 2050 | *cp++ = IAC255; |
| 2051 | *cp++ = SE240; |
| 2052 | if (NETROOM()(ring_empty_count(&netoring)) >= cp - tmp) { |
| 2053 | ring_supply_data(&netoring, tmp, cp-tmp); |
| 2054 | printsub('>', tmp+2, cp - tmp - 2); |
| 2055 | } |
| 2056 | ++want_status_response; |
| 2057 | return 1; |
| 2058 | } |
| 2059 | |
| 2060 | void |
| 2061 | intp(void) |
| 2062 | { |
| 2063 | NET2ADD(IAC, IP){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 244; ring_supplied(&netoring, 1); } ; }; |
| 2064 | printoption("SENT", IAC255, IP244); |
| 2065 | flushline = 1; |
| 2066 | if (autoflush) { |
| 2067 | doflush(); |
| 2068 | } |
| 2069 | if (autosynch) { |
| 2070 | dosynch(); |
| 2071 | } |
| 2072 | } |
| 2073 | |
| 2074 | void |
| 2075 | sendbrk(void) |
| 2076 | { |
| 2077 | NET2ADD(IAC, BREAK){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 243; ring_supplied(&netoring, 1); } ; }; |
| 2078 | printoption("SENT", IAC255, BREAK243); |
| 2079 | flushline = 1; |
| 2080 | if (autoflush) { |
| 2081 | doflush(); |
| 2082 | } |
| 2083 | if (autosynch) { |
| 2084 | dosynch(); |
| 2085 | } |
| 2086 | } |
| 2087 | |
| 2088 | void |
| 2089 | sendabort(void) |
| 2090 | { |
| 2091 | NET2ADD(IAC, ABORT){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 238; ring_supplied(&netoring, 1); } ; }; |
| 2092 | printoption("SENT", IAC255, ABORT238); |
| 2093 | flushline = 1; |
| 2094 | if (autoflush) { |
| 2095 | doflush(); |
| 2096 | } |
| 2097 | if (autosynch) { |
| 2098 | dosynch(); |
| 2099 | } |
| 2100 | } |
| 2101 | |
| 2102 | void |
| 2103 | sendsusp(void) |
| 2104 | { |
| 2105 | NET2ADD(IAC, SUSP){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 237; ring_supplied(&netoring, 1); } ; }; |
| 2106 | printoption("SENT", IAC255, SUSP237); |
| 2107 | flushline = 1; |
| 2108 | if (autoflush) { |
| 2109 | doflush(); |
| 2110 | } |
| 2111 | if (autosynch) { |
| 2112 | dosynch(); |
| 2113 | } |
| 2114 | } |
| 2115 | |
| 2116 | void |
| 2117 | sendeof(void) |
| 2118 | { |
| 2119 | NET2ADD(IAC, xEOF){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 236; ring_supplied(&netoring, 1); } ; }; |
| 2120 | printoption("SENT", IAC255, xEOF236); |
| 2121 | } |
| 2122 | |
| 2123 | void |
| 2124 | sendayt(void) |
| 2125 | { |
| 2126 | NET2ADD(IAC, AYT){ { *netoring.supply = 255; ring_supplied(&netoring, 1); } ; { *netoring.supply = 246; ring_supplied(&netoring, 1); } ; }; |
| 2127 | printoption("SENT", IAC255, AYT246); |
| 2128 | } |
| 2129 | |
| 2130 | /* |
| 2131 | * Send a window size update to the remote system. |
| 2132 | */ |
| 2133 | |
| 2134 | void |
| 2135 | sendnaws(void) |
| 2136 | { |
| 2137 | long rows, cols; |
| 2138 | unsigned char tmp[16]; |
| 2139 | unsigned char *cp; |
| 2140 | |
| 2141 | if (my_state_is_wont(TELOPT_NAWS)(!(options[31]&0x01))) |
| 2142 | return; |
| 2143 | |
| 2144 | #define PUTSHORT(cp, x){ if ((*cp++ = ((x)>>8)&0xff) == 255) *cp++ = 255; if ((*cp++ = ((x))&0xff) == 255) *cp++ = 255; } { if ((*cp++ = ((x)>>8)&0xff) == IAC255) *cp++ = IAC255; \ |
| 2145 | if ((*cp++ = ((x))&0xff) == IAC255) *cp++ = IAC255; } |
| 2146 | |
| 2147 | if (TerminalWindowSize(&rows, &cols) == 0) { /* Failed */ |
| 2148 | return; |
| 2149 | } |
| 2150 | |
| 2151 | cp = tmp; |
| 2152 | |
| 2153 | *cp++ = IAC255; |
| 2154 | *cp++ = SB250; |
| 2155 | *cp++ = TELOPT_NAWS31; |
| 2156 | PUTSHORT(cp, cols){ if ((*cp++ = ((cols)>>8)&0xff) == 255) *cp++ = 255 ; if ((*cp++ = ((cols))&0xff) == 255) *cp++ = 255; }; |
| 2157 | PUTSHORT(cp, rows){ if ((*cp++ = ((rows)>>8)&0xff) == 255) *cp++ = 255 ; if ((*cp++ = ((rows))&0xff) == 255) *cp++ = 255; }; |
| 2158 | *cp++ = IAC255; |
| 2159 | *cp++ = SE240; |
| 2160 | if (NETROOM()(ring_empty_count(&netoring)) >= cp - tmp) { |
| 2161 | ring_supply_data(&netoring, tmp, cp-tmp); |
| 2162 | printsub('>', tmp+2, cp - tmp - 2); |
| 2163 | } |
| 2164 | } |
| 2165 | |
| 2166 | void |
| 2167 | tel_enter_binary(int rw) |
| 2168 | { |
| 2169 | if (rw&1) |
| 2170 | send_do(TELOPT_BINARY0, 1); |
| 2171 | if (rw&2) |
| 2172 | send_will(TELOPT_BINARY0, 1); |
| 2173 | } |
| 2174 | |
| 2175 | void |
| 2176 | tel_leave_binary(int rw) |
| 2177 | { |
| 2178 | if (rw&1) |
| 2179 | send_dont(TELOPT_BINARY0, 1); |
| 2180 | if (rw&2) |
| 2181 | send_wont(TELOPT_BINARY0, 1); |
| 2182 | } |