ppp-deflate.c revision 1.17.6.1
1 /* $NetBSD: ppp-deflate.c,v 1.17.6.1 2008/12/13 01:15:26 haad Exp $ */ 2 /* Id: ppp-deflate.c,v 1.5 1997/03/04 03:33:28 paulus Exp */ 3 4 /* 5 * ppp_deflate.c - interface the zlib procedures for Deflate compression 6 * and decompression (as used by gzip) to the PPP code. 7 * This version is for use with mbufs on BSD-derived systems. 8 * 9 * Copyright (c) 1989-2002 Paul Mackerras. All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in 20 * the documentation and/or other materials provided with the 21 * distribution. 22 * 23 * 3. The name(s) of the authors of this software must not be used to 24 * endorse or promote products derived from this software without 25 * prior written permission. 26 * 27 * 4. Redistributions of any form whatsoever must retain the following 28 * acknowledgment: 29 * "This product includes software developed by Paul Mackerras 30 * <paulus (at) samba.org>". 31 * 32 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO 33 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 34 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY 35 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 36 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 37 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 38 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: ppp-deflate.c,v 1.17.6.1 2008/12/13 01:15:26 haad Exp $"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/mbuf.h> 47 #include <sys/module.h> 48 #include <net/if.h> 49 #include <net/ppp_defs.h> 50 #include <net/if_ppp.h> 51 #include <net/zlib.h> 52 53 #define PACKETPTR struct mbuf * 54 #include <net/ppp-comp.h> 55 56 #if DO_DEFLATE 57 58 #define DEFLATE_DEBUG 1 59 60 /* 61 * State for a Deflate (de)compressor. 62 */ 63 struct deflate_state { 64 int seqno; 65 int w_size; 66 int unit; 67 int hdrlen; 68 int mru; 69 int debug; 70 z_stream strm; 71 struct compstat stats; 72 }; 73 74 #define DEFLATE_OVHD 2 /* Deflate overhead/packet */ 75 76 static void *zalloc(void *, u_int items, u_int size); 77 static void zfree(void *, void *ptr); 78 static void *z_comp_alloc(u_char *options, int opt_len); 79 static void *z_decomp_alloc(u_char *options, int opt_len); 80 static void z_comp_free(void *state); 81 static void z_decomp_free(void *state); 82 static int z_comp_init(void *state, u_char *options, int opt_len, 83 int unit, int hdrlen, int debug); 84 static int z_decomp_init(void *state, u_char *options, int opt_len, 85 int unit, int hdrlen, int mru, int debug); 86 static int z_compress(void *state, struct mbuf **mret, 87 struct mbuf *mp, int slen, int maxolen); 88 static void z_incomp(void *state, struct mbuf *dmsg); 89 static int z_decompress(void *state, struct mbuf *cmp, 90 struct mbuf **dmpp); 91 static void z_comp_reset(void *state); 92 static void z_decomp_reset(void *state); 93 static void z_comp_stats(void *state, struct compstat *stats); 94 95 /* 96 * Procedures exported to if_ppp.c. 97 */ 98 static struct compressor ppp_deflate[2] = { { 99 .compress_proto = CI_DEFLATE, 100 .comp_alloc = z_comp_alloc, 101 .comp_free = z_comp_free, 102 .comp_init = z_comp_init, 103 .comp_reset = z_comp_reset, 104 .compress = z_compress, 105 .comp_stat = z_comp_stats, 106 .decomp_alloc = z_decomp_alloc, 107 .decomp_free = z_decomp_free, 108 .decomp_init = z_decomp_init, 109 .decomp_reset = z_decomp_reset, 110 .decompress = z_decompress, 111 .incomp = z_incomp, 112 .decomp_stat = z_comp_stats, 113 }, 114 { 115 .compress_proto = CI_DEFLATE_DRAFT, 116 .comp_alloc = z_comp_alloc, 117 .comp_free = z_comp_free, 118 .comp_init = z_comp_init, 119 .comp_reset = z_comp_reset, 120 .compress = z_compress, 121 .comp_stat = z_comp_stats, 122 .decomp_alloc = z_decomp_alloc, 123 .decomp_free = z_decomp_free, 124 .decomp_init = z_decomp_init, 125 .decomp_reset = z_decomp_reset, 126 .decompress = z_decompress, 127 .incomp = z_incomp, 128 .decomp_stat = z_comp_stats, 129 } }; 130 /* 131 * Space allocation and freeing routines for use by zlib routines. 132 */ 133 void * 134 zalloc(void *notused, u_int items, u_int size) 135 { 136 void *ptr; 137 138 ptr = malloc(items * size, M_DEVBUF, M_NOWAIT); 139 return ptr; 140 } 141 142 void 143 zfree(void *notused, void *ptr) 144 { 145 free(ptr, M_DEVBUF); 146 } 147 148 /* 149 * Allocate space for a compressor. 150 */ 151 static void * 152 z_comp_alloc(u_char *options, int opt_len) 153 { 154 struct deflate_state *state; 155 int w_size; 156 157 if (opt_len != CILEN_DEFLATE 158 || (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT) 159 || options[1] != CILEN_DEFLATE 160 || DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL 161 || options[3] != DEFLATE_CHK_SEQUENCE) 162 return NULL; 163 w_size = DEFLATE_SIZE(options[2]); 164 if (w_size < DEFLATE_MIN_SIZE || w_size > DEFLATE_MAX_SIZE) 165 return NULL; 166 167 MALLOC(state, struct deflate_state *, sizeof(struct deflate_state), 168 M_DEVBUF, M_NOWAIT); 169 if (state == NULL) 170 return NULL; 171 172 state->strm.next_in = NULL; 173 state->strm.zalloc = zalloc; 174 state->strm.zfree = zfree; 175 if (deflateInit2(&state->strm, Z_DEFAULT_COMPRESSION, DEFLATE_METHOD_VAL, 176 -w_size, 8, Z_DEFAULT_STRATEGY) != Z_OK) { 177 FREE(state, M_DEVBUF); 178 return NULL; 179 } 180 181 state->w_size = w_size; 182 memset(&state->stats, 0, sizeof(state->stats)); 183 return (void *) state; 184 } 185 186 static void 187 z_comp_free(void *arg) 188 { 189 struct deflate_state *state = (struct deflate_state *) arg; 190 191 deflateEnd(&state->strm); 192 FREE(state, M_DEVBUF); 193 } 194 195 static int 196 z_comp_init(void *arg, u_char *options, int opt_len, int unit, int hdrlen, 197 int debug) 198 { 199 struct deflate_state *state = (struct deflate_state *) arg; 200 201 if (opt_len < CILEN_DEFLATE 202 || (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT) 203 || options[1] != CILEN_DEFLATE 204 || DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL 205 || DEFLATE_SIZE(options[2]) != state->w_size 206 || options[3] != DEFLATE_CHK_SEQUENCE) 207 return 0; 208 209 state->seqno = 0; 210 state->unit = unit; 211 state->hdrlen = hdrlen; 212 state->debug = debug; 213 214 deflateReset(&state->strm); 215 216 return 1; 217 } 218 219 static void 220 z_comp_reset(void *arg) 221 { 222 struct deflate_state *state = (struct deflate_state *) arg; 223 224 state->seqno = 0; 225 deflateReset(&state->strm); 226 } 227 228 int 229 z_compress(void *arg, 230 struct mbuf **mret /* compressed packet (out) */, 231 struct mbuf *mp /* uncompressed packet (in) */, 232 int orig_len, int maxolen) 233 { 234 struct deflate_state *state = (struct deflate_state *) arg; 235 u_char *rptr, *wptr; 236 int proto, olen, wspace, r, flush; 237 struct mbuf *m; 238 239 /* 240 * Check that the protocol is in the range we handle. 241 */ 242 rptr = mtod(mp, u_char *); 243 proto = PPP_PROTOCOL(rptr); 244 if (proto > 0x3fff || proto == 0xfd || proto == 0xfb) { 245 *mret = NULL; 246 return orig_len; 247 } 248 249 /* Allocate one mbuf initially. */ 250 if (maxolen > orig_len) 251 maxolen = orig_len; 252 MGET(m, M_DONTWAIT, MT_DATA); 253 *mret = m; 254 if (m != NULL) { 255 m->m_len = 0; 256 if (maxolen + state->hdrlen > MLEN) 257 MCLGET(m, M_DONTWAIT); 258 wspace = M_TRAILINGSPACE(m); 259 if (state->hdrlen + PPP_HDRLEN + 2 < wspace) { 260 m->m_data += state->hdrlen; 261 wspace -= state->hdrlen; 262 } 263 wptr = mtod(m, u_char *); 264 265 /* 266 * Copy over the PPP header and store the 2-byte sequence number. 267 */ 268 wptr[0] = PPP_ADDRESS(rptr); 269 wptr[1] = PPP_CONTROL(rptr); 270 wptr[2] = PPP_COMP >> 8; 271 wptr[3] = PPP_COMP; 272 wptr += PPP_HDRLEN; 273 wptr[0] = state->seqno >> 8; 274 wptr[1] = state->seqno; 275 wptr += 2; 276 state->strm.next_out = wptr; 277 state->strm.avail_out = wspace - (PPP_HDRLEN + 2); 278 } else { 279 state->strm.next_out = NULL; 280 state->strm.avail_out = 1000000; 281 wptr = NULL; 282 wspace = 0; 283 } 284 ++state->seqno; 285 286 rptr += (proto > 0xff)? 2: 3; /* skip 1st proto byte if 0 */ 287 state->strm.next_in = rptr; 288 state->strm.avail_in = mtod(mp, u_char *) + mp->m_len - rptr; 289 mp = mp->m_next; 290 flush = (mp == NULL)? Z_PACKET_FLUSH: Z_NO_FLUSH; 291 olen = 0; 292 for (;;) { 293 r = deflate(&state->strm, flush); 294 if (r != Z_OK) { 295 printf("z_compress: deflate returned %d (%s)\n", 296 r, (state->strm.msg? state->strm.msg: "")); 297 break; 298 } 299 if (flush != Z_NO_FLUSH && state->strm.avail_out != 0) 300 break; /* all done */ 301 if (state->strm.avail_in == 0 && mp != NULL) { 302 state->strm.next_in = mtod(mp, u_char *); 303 state->strm.avail_in = mp->m_len; 304 mp = mp->m_next; 305 if (mp == NULL) 306 flush = Z_PACKET_FLUSH; 307 } 308 if (state->strm.avail_out == 0) { 309 if (m != NULL) { 310 m->m_len = wspace; 311 olen += wspace; 312 MGET(m->m_next, M_DONTWAIT, MT_DATA); 313 m = m->m_next; 314 if (m != NULL) { 315 m->m_len = 0; 316 if (maxolen - olen > MLEN) 317 MCLGET(m, M_DONTWAIT); 318 state->strm.next_out = mtod(m, u_char *); 319 state->strm.avail_out = wspace = M_TRAILINGSPACE(m); 320 } 321 } 322 if (m == NULL) { 323 state->strm.next_out = NULL; 324 state->strm.avail_out = 1000000; 325 } 326 } 327 } 328 if (m != NULL) 329 olen += (m->m_len = wspace - state->strm.avail_out); 330 331 /* 332 * See if we managed to reduce the size of the packet. 333 */ 334 if (m != NULL && olen < orig_len) { 335 state->stats.comp_bytes += olen; 336 state->stats.comp_packets++; 337 } else { 338 if (*mret != NULL) { 339 m_freem(*mret); 340 *mret = NULL; 341 } 342 state->stats.inc_bytes += orig_len; 343 state->stats.inc_packets++; 344 olen = orig_len; 345 } 346 state->stats.unc_bytes += orig_len; 347 state->stats.unc_packets++; 348 349 return olen; 350 } 351 352 static void 353 z_comp_stats(void *arg, struct compstat *stats) 354 { 355 struct deflate_state *state = (struct deflate_state *) arg; 356 u_int out; 357 358 *stats = state->stats; 359 stats->ratio = stats->unc_bytes; 360 out = stats->comp_bytes + stats->inc_bytes; 361 if (stats->ratio <= 0x7ffffff) 362 stats->ratio <<= 8; 363 else 364 out >>= 8; 365 if (out != 0) 366 stats->ratio /= out; 367 } 368 369 /* 370 * Allocate space for a decompressor. 371 */ 372 static void * 373 z_decomp_alloc(u_char *options, int opt_len) 374 { 375 struct deflate_state *state; 376 int w_size; 377 378 if (opt_len != CILEN_DEFLATE 379 || (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT) 380 || options[1] != CILEN_DEFLATE 381 || DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL 382 || options[3] != DEFLATE_CHK_SEQUENCE) 383 return NULL; 384 w_size = DEFLATE_SIZE(options[2]); 385 if (w_size < DEFLATE_MIN_SIZE || w_size > DEFLATE_MAX_SIZE) 386 return NULL; 387 388 MALLOC(state, struct deflate_state *, sizeof(struct deflate_state), 389 M_DEVBUF, M_NOWAIT); 390 if (state == NULL) 391 return NULL; 392 393 state->strm.next_out = NULL; 394 state->strm.zalloc = zalloc; 395 state->strm.zfree = zfree; 396 if (inflateInit2(&state->strm, -w_size) != Z_OK) { 397 FREE(state, M_DEVBUF); 398 return NULL; 399 } 400 401 state->w_size = w_size; 402 memset(&state->stats, 0, sizeof(state->stats)); 403 return (void *) state; 404 } 405 406 static void 407 z_decomp_free(void *arg) 408 { 409 struct deflate_state *state = (struct deflate_state *) arg; 410 411 inflateEnd(&state->strm); 412 FREE(state, M_DEVBUF); 413 } 414 415 static int 416 z_decomp_init(void *arg, u_char *options, int opt_len, int unit, int hdrlen, 417 int mru, int debug) 418 { 419 struct deflate_state *state = (struct deflate_state *) arg; 420 421 if (opt_len < CILEN_DEFLATE 422 || (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT) 423 || options[1] != CILEN_DEFLATE 424 || DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL 425 || DEFLATE_SIZE(options[2]) != state->w_size 426 || options[3] != DEFLATE_CHK_SEQUENCE) 427 return 0; 428 429 state->seqno = 0; 430 state->unit = unit; 431 state->hdrlen = hdrlen; 432 state->debug = debug; 433 state->mru = mru; 434 435 inflateReset(&state->strm); 436 437 return 1; 438 } 439 440 static void 441 z_decomp_reset(void *arg) 442 { 443 struct deflate_state *state = (struct deflate_state *) arg; 444 445 state->seqno = 0; 446 inflateReset(&state->strm); 447 } 448 449 /* 450 * Decompress a Deflate-compressed packet. 451 * 452 * Because of patent problems, we return DECOMP_ERROR for errors 453 * found by inspecting the input data and for system problems, but 454 * DECOMP_FATALERROR for any errors which could possibly be said to 455 * be being detected "after" decompression. For DECOMP_ERROR, 456 * we can issue a CCP reset-request; for DECOMP_FATALERROR, we may be 457 * infringing a patent of Motorola's if we do, so we take CCP down 458 * instead. 459 * 460 * Given that the frame has the correct sequence number and a good FCS, 461 * errors such as invalid codes in the input most likely indicate a 462 * bug, so we return DECOMP_FATALERROR for them in order to turn off 463 * compression, even though they are detected by inspecting the input. 464 */ 465 int 466 z_decompress(void *arg, struct mbuf *mi, struct mbuf **mop) 467 { 468 struct deflate_state *state = (struct deflate_state *) arg; 469 struct mbuf *mo, *mo_head; 470 u_char *rptr, *wptr; 471 int rlen, olen, ospace; 472 int seq, i, flush, r, decode_proto; 473 u_char hdr[PPP_HDRLEN + DEFLATE_OVHD]; 474 475 *mop = NULL; 476 rptr = mtod(mi, u_char *); 477 rlen = mi->m_len; 478 for (i = 0; i < PPP_HDRLEN + DEFLATE_OVHD; ++i) { 479 while (rlen <= 0) { 480 mi = mi->m_next; 481 if (mi == NULL) 482 return DECOMP_ERROR; 483 rptr = mtod(mi, u_char *); 484 rlen = mi->m_len; 485 } 486 hdr[i] = *rptr++; 487 --rlen; 488 } 489 490 /* Check the sequence number. */ 491 seq = (hdr[PPP_HDRLEN] << 8) + hdr[PPP_HDRLEN+1]; 492 if (seq != state->seqno) { 493 if (state->debug) 494 printf("z_decompress%d: bad seq # %d, expected %d\n", 495 state->unit, seq, state->seqno); 496 return DECOMP_ERROR; 497 } 498 ++state->seqno; 499 500 /* Allocate an output mbuf. */ 501 MGETHDR(mo, M_DONTWAIT, MT_DATA); 502 if (mo == NULL) 503 return DECOMP_ERROR; 504 mo_head = mo; 505 mo->m_len = 0; 506 mo->m_next = NULL; 507 MCLGET(mo, M_DONTWAIT); 508 ospace = M_TRAILINGSPACE(mo); 509 if (state->hdrlen + PPP_HDRLEN < ospace) { 510 mo->m_data += state->hdrlen; 511 ospace -= state->hdrlen; 512 } 513 514 /* 515 * Fill in the first part of the PPP header. The protocol field 516 * comes from the decompressed data. 517 */ 518 wptr = mtod(mo, u_char *); 519 wptr[0] = PPP_ADDRESS(hdr); 520 wptr[1] = PPP_CONTROL(hdr); 521 wptr[2] = 0; 522 523 /* 524 * Set up to call inflate. We set avail_out to 1 initially so we can 525 * look at the first byte of the output and decide whether we have 526 * a 1-byte or 2-byte protocol field. 527 */ 528 state->strm.next_in = rptr; 529 state->strm.avail_in = rlen; 530 mi = mi->m_next; 531 flush = (mi == NULL)? Z_PACKET_FLUSH: Z_NO_FLUSH; 532 rlen += PPP_HDRLEN + DEFLATE_OVHD; 533 state->strm.next_out = wptr + 3; 534 state->strm.avail_out = 1; 535 decode_proto = 1; 536 olen = 0; 537 538 /* 539 * Call inflate, supplying more input or output as needed. 540 */ 541 for (;;) { 542 r = inflate(&state->strm, flush); 543 if (r != Z_OK) { 544 #if !DEFLATE_DEBUG 545 if (state->debug) 546 #endif 547 printf("z_decompress%d: inflate returned %d (%s)\n", 548 state->unit, r, (state->strm.msg? state->strm.msg: "")); 549 m_freem(mo_head); 550 return DECOMP_FATALERROR; 551 } 552 if (flush != Z_NO_FLUSH && state->strm.avail_out != 0) 553 break; /* all done */ 554 if (state->strm.avail_in == 0 && mi != NULL) { 555 state->strm.next_in = mtod(mi, u_char *); 556 state->strm.avail_in = mi->m_len; 557 rlen += mi->m_len; 558 mi = mi->m_next; 559 if (mi == NULL) 560 flush = Z_PACKET_FLUSH; 561 } 562 if (state->strm.avail_out == 0) { 563 if (decode_proto) { 564 state->strm.avail_out = ospace - PPP_HDRLEN; 565 if ((wptr[3] & 1) == 0) { 566 /* 2-byte protocol field */ 567 wptr[2] = wptr[3]; 568 --state->strm.next_out; 569 ++state->strm.avail_out; 570 --olen; 571 } 572 decode_proto = 0; 573 } else { 574 mo->m_len = ospace; 575 olen += ospace; 576 MGET(mo->m_next, M_DONTWAIT, MT_DATA); 577 mo = mo->m_next; 578 if (mo == NULL) { 579 m_freem(mo_head); 580 return DECOMP_ERROR; 581 } 582 MCLGET(mo, M_DONTWAIT); 583 state->strm.next_out = mtod(mo, u_char *); 584 state->strm.avail_out = ospace = M_TRAILINGSPACE(mo); 585 } 586 } 587 } 588 if (decode_proto) { 589 m_freem(mo_head); 590 return DECOMP_ERROR; 591 } 592 olen += (mo->m_len = ospace - state->strm.avail_out); 593 #if DEFLATE_DEBUG 594 if (olen > state->mru + PPP_HDRLEN) 595 printf("ppp_deflate%d: exceeded mru (%d > %d)\n", 596 state->unit, olen, state->mru + PPP_HDRLEN); 597 #endif 598 599 state->stats.unc_bytes += olen; 600 state->stats.unc_packets++; 601 state->stats.comp_bytes += rlen; 602 state->stats.comp_packets++; 603 604 *mop = mo_head; 605 return DECOMP_OK; 606 } 607 608 /* 609 * Incompressible data has arrived - add it to the history. 610 */ 611 static void 612 z_incomp(void *arg, struct mbuf *mi) 613 { 614 struct deflate_state *state = (struct deflate_state *) arg; 615 u_char *rptr; 616 int rlen, proto, r; 617 618 /* 619 * Check that the protocol is one we handle. 620 */ 621 rptr = mtod(mi, u_char *); 622 proto = PPP_PROTOCOL(rptr); 623 if (proto > 0x3fff || proto == 0xfd || proto == 0xfb) 624 return; 625 626 ++state->seqno; 627 628 /* 629 * Iterate through the mbufs, adding the characters in them 630 * to the decompressor's history. For the first mbuf, we start 631 * at the either the 1st or 2nd byte of the protocol field, 632 * depending on whether the protocol value is compressible. 633 */ 634 rlen = mi->m_len; 635 state->strm.next_in = rptr + 3; 636 state->strm.avail_in = rlen - 3; 637 if (proto > 0xff) { 638 --state->strm.next_in; 639 ++state->strm.avail_in; 640 } 641 for (;;) { 642 r = inflateIncomp(&state->strm); 643 if (r != Z_OK) { 644 /* gak! */ 645 #if !DEFLATE_DEBUG 646 if (state->debug) 647 #endif 648 printf("z_incomp%d: inflateIncomp returned %d (%s)\n", 649 state->unit, r, (state->strm.msg? state->strm.msg: "")); 650 return; 651 } 652 mi = mi->m_next; 653 if (mi == NULL) 654 break; 655 state->strm.next_in = mtod(mi, u_char *); 656 state->strm.avail_in = mi->m_len; 657 rlen += mi->m_len; 658 } 659 660 /* 661 * Update stats. 662 */ 663 state->stats.inc_bytes += rlen; 664 state->stats.inc_packets++; 665 state->stats.unc_bytes += rlen; 666 state->stats.unc_packets++; 667 } 668 669 MODULE(MODULE_CLASS_MISC, ppp_deflate, NULL); 670 671 static int 672 ppp_deflate_modcmd(modcmd_t cmd, void *arg) 673 { 674 675 switch (cmd) { 676 case MODULE_CMD_INIT: 677 return ppp_register_compressor(ppp_deflate, 2); 678 case MODULE_CMD_FINI: 679 return ppp_unregister_compressor(ppp_deflate, 2); 680 case MODULE_CMD_STAT: 681 return 0; 682 default: 683 return ENOTTY; 684 } 685 686 return ENOTTY; 687 } 688 #endif /* DO_DEFLATE */ 689
Indexes created Thu Oct 23 18:09:57 GMT 2025