Annotation of sys/net/ppp-deflate.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: ppp-deflate.c,v 1.7 2002/09/13 00:12:07 deraadt Exp $ */
2: /* $NetBSD: ppp-deflate.c,v 1.1 1996/03/15 02:28:09 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@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/param.h>
42: #include <sys/types.h>
43: #include <sys/systm.h>
44: #include <sys/mbuf.h>
45: #include <net/ppp_defs.h>
46: #include <net/zlib.h>
47:
48: #define PACKETPTR struct mbuf *
49: #include <net/ppp-comp.h>
50:
51: #if DO_DEFLATE
52:
53: /*
54: * State for a Deflate (de)compressor.
55: */
56: struct deflate_state {
57: int seqno;
58: int w_size;
59: int unit;
60: int hdrlen;
61: int mru;
62: int debug;
63: z_stream strm;
64: struct compstat stats;
65: };
66:
67: #define DEFLATE_OVHD 2 /* Deflate overhead/packet */
68:
69: static void *zalloc(void *, u_int items, u_int size);
70: static void zfree(void *, void *ptr, u_int nb);
71: static void *z_comp_alloc(u_char *options, int opt_len);
72: static void *z_decomp_alloc(u_char *options, int opt_len);
73: static void z_comp_free(void *state);
74: static void z_decomp_free(void *state);
75: static int z_comp_init(void *state, u_char *options, int opt_len,
76: int unit, int hdrlen, int debug);
77: static int z_decomp_init(void *state, u_char *options, int opt_len,
78: int unit, int hdrlen, int mru, int debug);
79: static int z_compress(void *state, struct mbuf **mret,
80: struct mbuf *mp, int slen, int maxolen);
81: static void z_incomp(void *state, struct mbuf *dmsg);
82: static int z_decompress(void *state, struct mbuf *cmp,
83: struct mbuf **dmpp);
84: static void z_comp_reset(void *state);
85: static void z_decomp_reset(void *state);
86: static void z_comp_stats(void *state, struct compstat *stats);
87:
88: /*
89: * Procedures exported to if_ppp.c.
90: */
91: struct compressor ppp_deflate = {
92: CI_DEFLATE, /* compress_proto */
93: z_comp_alloc, /* comp_alloc */
94: z_comp_free, /* comp_free */
95: z_comp_init, /* comp_init */
96: z_comp_reset, /* comp_reset */
97: z_compress, /* compress */
98: z_comp_stats, /* comp_stat */
99: z_decomp_alloc, /* decomp_alloc */
100: z_decomp_free, /* decomp_free */
101: z_decomp_init, /* decomp_init */
102: z_decomp_reset, /* decomp_reset */
103: z_decompress, /* decompress */
104: z_incomp, /* incomp */
105: z_comp_stats, /* decomp_stat */
106: };
107:
108: struct compressor ppp_deflate_draft = {
109: CI_DEFLATE_DRAFT, /* compress_proto */
110: z_comp_alloc, /* comp_alloc */
111: z_comp_free, /* comp_free */
112: z_comp_init, /* comp_init */
113: z_comp_reset, /* comp_reset */
114: z_compress, /* compress */
115: z_comp_stats, /* comp_stat */
116: z_decomp_alloc, /* decomp_alloc */
117: z_decomp_free, /* decomp_free */
118: z_decomp_init, /* decomp_init */
119: z_decomp_reset, /* decomp_reset */
120: z_decompress, /* decompress */
121: z_incomp, /* incomp */
122: z_comp_stats, /* decomp_stat */
123: };
124: /*
125: * Space allocation and freeing routines for use by zlib routines.
126: */
127: void *
128: zalloc(notused, items, size)
129: void *notused;
130: u_int items, size;
131: {
132: void *ptr;
133:
134: MALLOC(ptr, void *, items * size, M_DEVBUF, M_NOWAIT);
135: return ptr;
136: }
137:
138: void
139: zfree(notused, ptr, nbytes)
140: void *notused;
141: void *ptr;
142: u_int nbytes;
143: {
144: FREE(ptr, M_DEVBUF);
145: }
146:
147: /*
148: * Allocate space for a compressor.
149: */
150: static void *
151: z_comp_alloc(options, opt_len)
152: u_char *options;
153: int opt_len;
154: {
155: struct deflate_state *state;
156: int w_size;
157:
158: if (opt_len != CILEN_DEFLATE
159: || (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT)
160: || options[1] != CILEN_DEFLATE
161: || DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL
162: || options[3] != DEFLATE_CHK_SEQUENCE)
163: return NULL;
164: w_size = DEFLATE_SIZE(options[2]);
165: if (w_size < DEFLATE_MIN_SIZE || w_size > DEFLATE_MAX_SIZE)
166: return NULL;
167:
168: MALLOC(state, struct deflate_state *, sizeof(struct deflate_state),
169: M_DEVBUF, M_NOWAIT);
170: if (state == NULL)
171: return NULL;
172:
173: state->strm.next_in = NULL;
174: state->strm.zalloc = zalloc;
175: state->strm.zfree = zfree;
176: if (deflateInit2(&state->strm, Z_DEFAULT_COMPRESSION, DEFLATE_METHOD_VAL,
177: -w_size, 8, Z_DEFAULT_STRATEGY, DEFLATE_OVHD+2) != Z_OK) {
178: FREE(state, M_DEVBUF);
179: return NULL;
180: }
181:
182: state->w_size = w_size;
183: bzero(&state->stats, sizeof(state->stats));
184: return (void *) state;
185: }
186:
187: static void
188: z_comp_free(arg)
189: void *arg;
190: {
191: struct deflate_state *state = (struct deflate_state *) arg;
192:
193: deflateEnd(&state->strm);
194: FREE(state, M_DEVBUF);
195: }
196:
197: static int
198: z_comp_init(arg, options, opt_len, unit, hdrlen, debug)
199: void *arg;
200: u_char *options;
201: int opt_len, unit, hdrlen, debug;
202: {
203: struct deflate_state *state = (struct deflate_state *) arg;
204:
205: if (opt_len < CILEN_DEFLATE
206: || (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT)
207: || options[1] != CILEN_DEFLATE
208: || DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL
209: || DEFLATE_SIZE(options[2]) != state->w_size
210: || options[3] != DEFLATE_CHK_SEQUENCE)
211: return 0;
212:
213: state->seqno = 0;
214: state->unit = unit;
215: state->hdrlen = hdrlen;
216: state->debug = debug;
217:
218: deflateReset(&state->strm);
219:
220: return 1;
221: }
222:
223: static void
224: z_comp_reset(arg)
225: void *arg;
226: {
227: struct deflate_state *state = (struct deflate_state *) arg;
228:
229: state->seqno = 0;
230: deflateReset(&state->strm);
231: }
232:
233: int
234: z_compress(arg, mret, mp, orig_len, maxolen)
235: void *arg;
236: struct mbuf **mret; /* compressed packet (out) */
237: struct mbuf *mp; /* uncompressed packet (in) */
238: int orig_len, maxolen;
239: {
240: struct deflate_state *state = (struct deflate_state *) arg;
241: u_char *rptr, *wptr;
242: int proto, olen, wspace, r, flush;
243: struct mbuf *m;
244:
245: /*
246: * Check that the protocol is in the range we handle.
247: */
248: rptr = mtod(mp, u_char *);
249: proto = PPP_PROTOCOL(rptr);
250: if (proto > 0x3fff || proto == 0xfd || proto == 0xfb) {
251: *mret = NULL;
252: return orig_len;
253: }
254:
255: /* Allocate one mbuf initially. */
256: if (maxolen > orig_len)
257: maxolen = orig_len;
258: MGET(m, M_DONTWAIT, MT_DATA);
259: *mret = m;
260: if (m != NULL) {
261: m->m_len = 0;
262: if (maxolen + state->hdrlen > MLEN)
263: MCLGET(m, M_DONTWAIT);
264: wspace = M_TRAILINGSPACE(m);
265: if (state->hdrlen + PPP_HDRLEN + 2 < wspace) {
266: m->m_data += state->hdrlen;
267: wspace -= state->hdrlen;
268: }
269: wptr = mtod(m, u_char *);
270:
271: /*
272: * Copy over the PPP header and store the 2-byte sequence number.
273: */
274: wptr[0] = PPP_ADDRESS(rptr);
275: wptr[1] = PPP_CONTROL(rptr);
276: wptr[2] = PPP_COMP >> 8;
277: wptr[3] = PPP_COMP;
278: wptr += PPP_HDRLEN;
279: wptr[0] = state->seqno >> 8;
280: wptr[1] = state->seqno;
281: wptr += 2;
282: state->strm.next_out = wptr;
283: state->strm.avail_out = wspace - (PPP_HDRLEN + 2);
284: } else {
285: state->strm.next_out = NULL;
286: state->strm.avail_out = 1000000;
287: wptr = NULL;
288: wspace = 0;
289: }
290: ++state->seqno;
291:
292: rptr += (proto > 0xff)? 2: 3; /* skip 1st proto byte if 0 */
293: state->strm.next_in = rptr;
294: state->strm.avail_in = mtod(mp, u_char *) + mp->m_len - rptr;
295: mp = mp->m_next;
296: flush = (mp == NULL)? Z_PACKET_FLUSH: Z_NO_FLUSH;
297: olen = 0;
298: for (;;) {
299: r = deflate(&state->strm, flush);
300: if (r != Z_OK) {
301: printf("z_compress: deflate returned %d (%s)\n",
302: r, (state->strm.msg? state->strm.msg: ""));
303: break;
304: }
305: if (flush != Z_NO_FLUSH && state->strm.avail_out != 0)
306: break; /* all done */
307: if (state->strm.avail_in == 0 && mp != NULL) {
308: state->strm.next_in = mtod(mp, u_char *);
309: state->strm.avail_in = mp->m_len;
310: mp = mp->m_next;
311: if (mp == NULL)
312: flush = Z_PACKET_FLUSH;
313: }
314: if (state->strm.avail_out == 0) {
315: if (m != NULL) {
316: m->m_len = wspace;
317: olen += wspace;
318: MGET(m->m_next, M_DONTWAIT, MT_DATA);
319: m = m->m_next;
320: if (m != NULL) {
321: m->m_len = 0;
322: if (maxolen - olen > MLEN)
323: MCLGET(m, M_DONTWAIT);
324: state->strm.next_out = mtod(m, u_char *);
325: state->strm.avail_out = wspace = M_TRAILINGSPACE(m);
326: }
327: }
328: if (m == NULL) {
329: state->strm.next_out = NULL;
330: state->strm.avail_out = 1000000;
331: }
332: }
333: }
334: if (m != NULL)
335: olen += (m->m_len = wspace - state->strm.avail_out);
336:
337: /*
338: * See if we managed to reduce the size of the packet.
339: * If the compressor just gave us a single zero byte, it means
340: * the packet was incompressible.
341: */
342: if (m != NULL && olen < orig_len
343: && !(olen == PPP_HDRLEN + 3 && *wptr == 0)) {
344: state->stats.comp_bytes += olen;
345: state->stats.comp_packets++;
346: } else {
347: if (*mret != NULL) {
348: m_freem(*mret);
349: *mret = NULL;
350: }
351: state->stats.inc_bytes += orig_len;
352: state->stats.inc_packets++;
353: olen = orig_len;
354: }
355: state->stats.unc_bytes += orig_len;
356: state->stats.unc_packets++;
357:
358: return olen;
359: }
360:
361: static void
362: z_comp_stats(arg, stats)
363: void *arg;
364: struct compstat *stats;
365: {
366: struct deflate_state *state = (struct deflate_state *) arg;
367: u_int out;
368:
369: *stats = state->stats;
370: stats->ratio = stats->unc_bytes;
371: out = stats->comp_bytes + stats->inc_bytes;
372: if (stats->ratio <= 0x7ffffff)
373: stats->ratio <<= 8;
374: else
375: out >>= 8;
376: if (out != 0)
377: stats->ratio /= out;
378: }
379:
380: /*
381: * Allocate space for a decompressor.
382: */
383: static void *
384: z_decomp_alloc(options, opt_len)
385: u_char *options;
386: int opt_len;
387: {
388: struct deflate_state *state;
389: int w_size;
390:
391: if (opt_len != CILEN_DEFLATE
392: || (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT)
393: || options[1] != CILEN_DEFLATE
394: || DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL
395: || options[3] != DEFLATE_CHK_SEQUENCE)
396: return NULL;
397: w_size = DEFLATE_SIZE(options[2]);
398: if (w_size < DEFLATE_MIN_SIZE || w_size > DEFLATE_MAX_SIZE)
399: return NULL;
400:
401: MALLOC(state, struct deflate_state *, sizeof(struct deflate_state),
402: M_DEVBUF, M_NOWAIT);
403: if (state == NULL)
404: return NULL;
405:
406: state->strm.next_out = NULL;
407: state->strm.zalloc = zalloc;
408: state->strm.zfree = zfree;
409: if (inflateInit2(&state->strm, -w_size) != Z_OK) {
410: FREE(state, M_DEVBUF);
411: return NULL;
412: }
413:
414: state->w_size = w_size;
415: bzero(&state->stats, sizeof(state->stats));
416: return (void *) state;
417: }
418:
419: static void
420: z_decomp_free(arg)
421: void *arg;
422: {
423: struct deflate_state *state = (struct deflate_state *) arg;
424:
425: inflateEnd(&state->strm);
426: FREE(state, M_DEVBUF);
427: }
428:
429: static int
430: z_decomp_init(arg, options, opt_len, unit, hdrlen, mru, debug)
431: void *arg;
432: u_char *options;
433: int opt_len, unit, hdrlen, mru, debug;
434: {
435: struct deflate_state *state = (struct deflate_state *) arg;
436:
437: if (opt_len < CILEN_DEFLATE
438: || (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT)
439: || options[1] != CILEN_DEFLATE
440: || DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL
441: || DEFLATE_SIZE(options[2]) != state->w_size
442: || options[3] != DEFLATE_CHK_SEQUENCE)
443: return 0;
444:
445: state->seqno = 0;
446: state->unit = unit;
447: state->hdrlen = hdrlen;
448: state->debug = debug;
449: state->mru = mru;
450:
451: inflateReset(&state->strm);
452:
453: return 1;
454: }
455:
456: static void
457: z_decomp_reset(arg)
458: void *arg;
459: {
460: struct deflate_state *state = (struct deflate_state *) arg;
461:
462: state->seqno = 0;
463: inflateReset(&state->strm);
464: }
465:
466: /*
467: * Decompress a Deflate-compressed packet.
468: *
469: * Because of patent problems, we return DECOMP_ERROR for errors
470: * found by inspecting the input data and for system problems, but
471: * DECOMP_FATALERROR for any errors which could possibly be said to
472: * be being detected "after" decompression. For DECOMP_ERROR,
473: * we can issue a CCP reset-request; for DECOMP_FATALERROR, we may be
474: * infringing a patent of Motorola's if we do, so we take CCP down
475: * instead.
476: *
477: * Given that the frame has the correct sequence number and a good FCS,
478: * errors such as invalid codes in the input most likely indicate a
479: * bug, so we return DECOMP_FATALERROR for them in order to turn off
480: * compression, even though they are detected by inspecting the input.
481: */
482: int
483: z_decompress(arg, mi, mop)
484: void *arg;
485: struct mbuf *mi, **mop;
486: {
487: struct deflate_state *state = (struct deflate_state *) arg;
488: struct mbuf *mo, *mo_head;
489: u_char *rptr, *wptr;
490: int rlen, olen, ospace;
491: int seq, i, flush, r, decode_proto;
492: u_char hdr[PPP_HDRLEN + DEFLATE_OVHD];
493:
494: *mop = NULL;
495: rptr = mtod(mi, u_char *);
496: rlen = mi->m_len;
497: for (i = 0; i < PPP_HDRLEN + DEFLATE_OVHD; ++i) {
498: while (rlen <= 0) {
499: mi = mi->m_next;
500: if (mi == NULL)
501: return DECOMP_ERROR;
502: rptr = mtod(mi, u_char *);
503: rlen = mi->m_len;
504: }
505: hdr[i] = *rptr++;
506: --rlen;
507: }
508:
509: /* Check the sequence number. */
510: seq = (hdr[PPP_HDRLEN] << 8) + hdr[PPP_HDRLEN+1];
511: if (seq != state->seqno) {
512: if (state->debug)
513: printf("z_decompress%d: bad seq # %d, expected %d\n",
514: state->unit, seq, state->seqno);
515: return DECOMP_ERROR;
516: }
517: ++state->seqno;
518:
519: /* Allocate an output mbuf. */
520: MGETHDR(mo, M_DONTWAIT, MT_DATA);
521: if (mo == NULL)
522: return DECOMP_ERROR;
523: mo_head = mo;
524: mo->m_len = 0;
525: mo->m_next = NULL;
526: MCLGET(mo, M_DONTWAIT);
527: ospace = M_TRAILINGSPACE(mo);
528: if (state->hdrlen + PPP_HDRLEN < ospace) {
529: mo->m_data += state->hdrlen;
530: ospace -= state->hdrlen;
531: }
532:
533: /*
534: * Fill in the first part of the PPP header. The protocol field
535: * comes from the decompressed data.
536: */
537: wptr = mtod(mo, u_char *);
538: wptr[0] = PPP_ADDRESS(hdr);
539: wptr[1] = PPP_CONTROL(hdr);
540: wptr[2] = 0;
541:
542: /*
543: * Set up to call inflate. We set avail_out to 1 initially so we can
544: * look at the first byte of the output and decide whether we have
545: * a 1-byte or 2-byte protocol field.
546: */
547: state->strm.next_in = rptr;
548: state->strm.avail_in = rlen;
549: mi = mi->m_next;
550: flush = (mi == NULL)? Z_PACKET_FLUSH: Z_NO_FLUSH;
551: rlen += PPP_HDRLEN + DEFLATE_OVHD;
552: state->strm.next_out = wptr + 3;
553: state->strm.avail_out = 1;
554: decode_proto = 1;
555: olen = PPP_HDRLEN;
556:
557: /*
558: * Call inflate, supplying more input or output as needed.
559: */
560: for (;;) {
561: r = inflate(&state->strm, flush);
562: if (r != Z_OK) {
563: #ifndef DEFLATE_DEBUG
564: if (state->debug)
565: #endif
566: printf("z_decompress%d: inflate returned %d (%s)\n",
567: state->unit, r, (state->strm.msg? state->strm.msg: ""));
568: m_freem(mo_head);
569: return DECOMP_FATALERROR;
570: }
571: if (flush != Z_NO_FLUSH && state->strm.avail_out != 0)
572: break; /* all done */
573: if (state->strm.avail_in == 0 && mi != NULL) {
574: state->strm.next_in = mtod(mi, u_char *);
575: state->strm.avail_in = mi->m_len;
576: rlen += mi->m_len;
577: mi = mi->m_next;
578: if (mi == NULL)
579: flush = Z_PACKET_FLUSH;
580: }
581: if (state->strm.avail_out == 0) {
582: if (decode_proto) {
583: state->strm.avail_out = ospace - PPP_HDRLEN;
584: if ((wptr[3] & 1) == 0) {
585: /* 2-byte protocol field */
586: wptr[2] = wptr[3];
587: --state->strm.next_out;
588: ++state->strm.avail_out;
589: --olen;
590: }
591: decode_proto = 0;
592: } else {
593: mo->m_len = ospace;
594: olen += ospace;
595: MGET(mo->m_next, M_DONTWAIT, MT_DATA);
596: mo = mo->m_next;
597: if (mo == NULL) {
598: m_freem(mo_head);
599: return DECOMP_ERROR;
600: }
601: MCLGET(mo, M_DONTWAIT);
602: state->strm.next_out = mtod(mo, u_char *);
603: state->strm.avail_out = ospace = M_TRAILINGSPACE(mo);
604: }
605: }
606: }
607: if (decode_proto) {
608: m_freem(mo_head);
609: return DECOMP_ERROR;
610: }
611: olen += (mo->m_len = ospace - state->strm.avail_out);
612: #ifdef DEFLATE_DEBUG
613: if (olen > state->mru + PPP_HDRLEN)
614: printf("ppp_deflate%d: exceeded mru (%d > %d)\n",
615: state->unit, olen, state->mru + PPP_HDRLEN);
616: #endif
617:
618: state->stats.unc_bytes += olen;
619: state->stats.unc_packets++;
620: state->stats.comp_bytes += rlen;
621: state->stats.comp_packets++;
622:
623: *mop = mo_head;
624: return DECOMP_OK;
625: }
626:
627: /*
628: * Incompressible data has arrived - add it to the history.
629: */
630: static void
631: z_incomp(arg, mi)
632: void *arg;
633: struct mbuf *mi;
634: {
635: struct deflate_state *state = (struct deflate_state *) arg;
636: u_char *rptr;
637: int rlen, proto, r;
638:
639: /*
640: * Check that the protocol is one we handle.
641: */
642: rptr = mtod(mi, u_char *);
643: proto = PPP_PROTOCOL(rptr);
644: if (proto > 0x3fff || proto == 0xfd || proto == 0xfb)
645: return;
646:
647: ++state->seqno;
648:
649: /*
650: * Iterate through the mbufs, adding the characters in them
651: * to the decompressor's history. For the first mbuf, we start
652: * at the either the 1st or 2nd byte of the protocol field,
653: * depending on whether the protocol value is compressible.
654: */
655: rlen = mi->m_len;
656: state->strm.next_in = rptr + 3;
657: state->strm.avail_in = rlen - 3;
658: if (proto > 0xff) {
659: --state->strm.next_in;
660: ++state->strm.avail_in;
661: }
662: for (;;) {
663: r = inflateIncomp(&state->strm);
664: if (r != Z_OK) {
665: /* gak! */
666: #ifndef DEFLATE_DEBUG
667: if (state->debug)
668: #endif
669: printf("z_incomp%d: inflateIncomp returned %d (%s)\n",
670: state->unit, r, (state->strm.msg? state->strm.msg: ""));
671: return;
672: }
673: mi = mi->m_next;
674: if (mi == NULL)
675: break;
676: state->strm.next_in = mtod(mi, u_char *);
677: state->strm.avail_in = mi->m_len;
678: rlen += mi->m_len;
679: }
680:
681: /*
682: * Update stats.
683: */
684: state->stats.inc_bytes += rlen;
685: state->stats.inc_packets++;
686: state->stats.unc_bytes += rlen;
687: state->stats.unc_packets++;
688: }
689:
690: #endif /* DO_DEFLATE */
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