1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2006 Alexander Motin <mav@alkar.net>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
12 * 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 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 /*
31 * Predictor-1 PPP compression netgraph node type.
32 */
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/mbuf.h>
38 #include <sys/malloc.h>
39 #include <sys/errno.h>
40 #include <sys/syslog.h>
41
42 #include <netgraph/ng_message.h>
43 #include <netgraph/netgraph.h>
44 #include <netgraph/ng_parse.h>
45 #include <netgraph/ng_pred1.h>
46
47 #include "opt_netgraph.h"
48
49 static MALLOC_DEFINE(M_NETGRAPH_PRED1, "netgraph_pred1", "netgraph pred1 node");
50
51 /* PRED1 header length */
52 #define PRED1_HDRLEN 2
53
54 #define PRED1_TABLE_SIZE 0x10000
55 #define PRED1_BUF_SIZE 4096
56 #define PPP_INITFCS 0xffff /* Initial FCS value */
57 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
58
59 /*
60 * The following hash code is the heart of the algorithm:
61 * it builds a sliding hash sum of the previous 3-and-a-bit
62 * characters which will be used to index the guess table.
63 * A better hash function would result in additional compression,
64 * at the expense of time.
65 */
66
67 #define HASH(x) priv->Hash = (priv->Hash << 4) ^ (x)
68
69 /* Node private data */
70 struct ng_pred1_private {
71 struct ng_pred1_config cfg; /* configuration */
72 u_char GuessTable[PRED1_TABLE_SIZE]; /* dictionary */
73 u_char inbuf[PRED1_BUF_SIZE]; /* input buffer */
74 u_char outbuf[PRED1_BUF_SIZE]; /* output buffer */
75 struct ng_pred1_stats stats; /* statistics */
76 uint16_t Hash;
77 ng_ID_t ctrlnode; /* path to controlling node */
78 uint16_t seqnum; /* sequence number */
79 u_char compress; /* compress/decompress flag */
80 };
81 typedef struct ng_pred1_private *priv_p;
82
83 /* Netgraph node methods */
84 static ng_constructor_t ng_pred1_constructor;
85 static ng_rcvmsg_t ng_pred1_rcvmsg;
86 static ng_shutdown_t ng_pred1_shutdown;
87 static ng_newhook_t ng_pred1_newhook;
88 static ng_rcvdata_t ng_pred1_rcvdata;
89 static ng_disconnect_t ng_pred1_disconnect;
90
91 /* Helper functions */
92 static int ng_pred1_compress(node_p node, struct mbuf *m,
93 struct mbuf **resultp);
94 static int ng_pred1_decompress(node_p node, struct mbuf *m,
95 struct mbuf **resultp);
96 static void Pred1Init(node_p node);
97 static int Pred1Compress(node_p node, u_char *source, u_char *dest,
98 int len);
99 static int Pred1Decompress(node_p node, u_char *source, u_char *dest,
100 int slen, int dlen);
101 static void Pred1SyncTable(node_p node, u_char *source, int len);
102 static uint16_t Crc16(uint16_t fcs, u_char *cp, int len);
103
104 static const uint16_t Crc16Table[];
105
106 /* Parse type for struct ng_pred1_config. */
107 static const struct ng_parse_struct_field ng_pred1_config_type_fields[]
108 = NG_PRED1_CONFIG_INFO;
109 static const struct ng_parse_type ng_pred1_config_type = {
110 &ng_parse_struct_type,
111 ng_pred1_config_type_fields
112 };
113
114 /* Parse type for struct ng_pred1_stat. */
115 static const struct ng_parse_struct_field ng_pred1_stats_type_fields[]
116 = NG_PRED1_STATS_INFO;
117 static const struct ng_parse_type ng_pred1_stat_type = {
118 &ng_parse_struct_type,
119 ng_pred1_stats_type_fields
120 };
121
122 /* List of commands and how to convert arguments to/from ASCII. */
123 static const struct ng_cmdlist ng_pred1_cmds[] = {
124 {
125 NGM_PRED1_COOKIE,
126 NGM_PRED1_CONFIG,
127 "config",
128 &ng_pred1_config_type,
129 NULL
130 },
131 {
132 NGM_PRED1_COOKIE,
133 NGM_PRED1_RESETREQ,
134 "resetreq",
135 NULL,
136 NULL
137 },
138 {
139 NGM_PRED1_COOKIE,
140 NGM_PRED1_GET_STATS,
141 "getstats",
142 NULL,
143 &ng_pred1_stat_type
144 },
145 {
146 NGM_PRED1_COOKIE,
147 NGM_PRED1_CLR_STATS,
148 "clrstats",
149 NULL,
150 NULL
151 },
152 {
153 NGM_PRED1_COOKIE,
154 NGM_PRED1_GETCLR_STATS,
155 "getclrstats",
156 NULL,
157 &ng_pred1_stat_type
158 },
159 { 0 }
160 };
161
162 /* Node type descriptor */
163 static struct ng_type ng_pred1_typestruct = {
164 .version = NG_ABI_VERSION,
165 .name = NG_PRED1_NODE_TYPE,
166 .constructor = ng_pred1_constructor,
167 .rcvmsg = ng_pred1_rcvmsg,
168 .shutdown = ng_pred1_shutdown,
169 .newhook = ng_pred1_newhook,
170 .rcvdata = ng_pred1_rcvdata,
171 .disconnect = ng_pred1_disconnect,
172 .cmdlist = ng_pred1_cmds,
173 };
174 NETGRAPH_INIT(pred1, &ng_pred1_typestruct);
175
176 #define ERROUT(x) do { error = (x); goto done; } while (0)
177
178 /************************************************************************
179 NETGRAPH NODE STUFF
180 ************************************************************************/
181
182 /*
183 * Node type constructor
184 */
185 static int
ng_pred1_constructor(node_p node)186 ng_pred1_constructor(node_p node)
187 {
188 priv_p priv;
189
190 /* Allocate private structure. */
191 priv = malloc(sizeof(*priv), M_NETGRAPH_PRED1, M_WAITOK | M_ZERO);
192
193 NG_NODE_SET_PRIVATE(node, priv);
194
195 /* This node is not thread safe. */
196 NG_NODE_FORCE_WRITER(node);
197
198 /* Done */
199 return (0);
200 }
201
202 /*
203 * Give our OK for a hook to be added.
204 */
205 static int
ng_pred1_newhook(node_p node,hook_p hook,const char * name)206 ng_pred1_newhook(node_p node, hook_p hook, const char *name)
207 {
208 const priv_p priv = NG_NODE_PRIVATE(node);
209
210 if (NG_NODE_NUMHOOKS(node) > 0)
211 return (EINVAL);
212
213 if (strcmp(name, NG_PRED1_HOOK_COMP) == 0)
214 priv->compress = 1;
215 else if (strcmp(name, NG_PRED1_HOOK_DECOMP) == 0)
216 priv->compress = 0;
217 else
218 return (EINVAL);
219
220 return (0);
221 }
222
223 /*
224 * Receive a control message.
225 */
226 static int
ng_pred1_rcvmsg(node_p node,item_p item,hook_p lasthook)227 ng_pred1_rcvmsg(node_p node, item_p item, hook_p lasthook)
228 {
229 const priv_p priv = NG_NODE_PRIVATE(node);
230 struct ng_mesg *resp = NULL;
231 int error = 0;
232 struct ng_mesg *msg;
233
234 NGI_GET_MSG(item, msg);
235
236 if (msg->header.typecookie != NGM_PRED1_COOKIE)
237 ERROUT(EINVAL);
238
239 switch (msg->header.cmd) {
240 case NGM_PRED1_CONFIG:
241 {
242 struct ng_pred1_config *const cfg =
243 (struct ng_pred1_config *)msg->data;
244
245 /* Check configuration. */
246 if (msg->header.arglen != sizeof(*cfg))
247 ERROUT(EINVAL);
248
249 /* Configuration is OK, reset to it. */
250 priv->cfg = *cfg;
251
252 /* Save return address so we can send reset-req's. */
253 priv->ctrlnode = NGI_RETADDR(item);
254
255 /* Clear our state. */
256 Pred1Init(node);
257
258 break;
259 }
260 case NGM_PRED1_RESETREQ:
261 Pred1Init(node);
262 break;
263
264 case NGM_PRED1_GET_STATS:
265 case NGM_PRED1_CLR_STATS:
266 case NGM_PRED1_GETCLR_STATS:
267 {
268 /* Create response. */
269 if (msg->header.cmd != NGM_PRED1_CLR_STATS) {
270 NG_MKRESPONSE(resp, msg,
271 sizeof(struct ng_pred1_stats), M_NOWAIT);
272 if (resp == NULL)
273 ERROUT(ENOMEM);
274 bcopy(&priv->stats, resp->data,
275 sizeof(struct ng_pred1_stats));
276 }
277
278 if (msg->header.cmd != NGM_PRED1_GET_STATS)
279 bzero(&priv->stats, sizeof(struct ng_pred1_stats));
280 break;
281 }
282
283 default:
284 error = EINVAL;
285 break;
286 }
287 done:
288 NG_RESPOND_MSG(error, node, item, resp);
289 NG_FREE_MSG(msg);
290 return (error);
291 }
292
293 /*
294 * Receive incoming data on our hook.
295 */
296 static int
ng_pred1_rcvdata(hook_p hook,item_p item)297 ng_pred1_rcvdata(hook_p hook, item_p item)
298 {
299 const node_p node = NG_HOOK_NODE(hook);
300 const priv_p priv = NG_NODE_PRIVATE(node);
301 struct mbuf *m, *out;
302 int error;
303
304 if (!priv->cfg.enable) {
305 NG_FREE_ITEM(item);
306 return (ENXIO);
307 }
308
309 NGI_GET_M(item, m);
310 /* Compress. */
311 if (priv->compress) {
312 if ((error = ng_pred1_compress(node, m, &out)) != 0) {
313 NG_FREE_ITEM(item);
314 log(LOG_NOTICE, "%s: error: %d\n", __func__, error);
315 return (error);
316 }
317
318 } else { /* Decompress. */
319 if ((error = ng_pred1_decompress(node, m, &out)) != 0) {
320 NG_FREE_ITEM(item);
321 log(LOG_NOTICE, "%s: error: %d\n", __func__, error);
322 if (priv->ctrlnode != 0) {
323 struct ng_mesg *msg;
324
325 /* Need to send a reset-request. */
326 NG_MKMESSAGE(msg, NGM_PRED1_COOKIE,
327 NGM_PRED1_RESETREQ, 0, M_NOWAIT);
328 if (msg == NULL)
329 return (error);
330 NG_SEND_MSG_ID(error, node, msg,
331 priv->ctrlnode, 0);
332 }
333 return (error);
334 }
335 }
336
337 NG_FWD_NEW_DATA(error, item, hook, out);
338 return (error);
339 }
340
341 /*
342 * Destroy node.
343 */
344 static int
ng_pred1_shutdown(node_p node)345 ng_pred1_shutdown(node_p node)
346 {
347 const priv_p priv = NG_NODE_PRIVATE(node);
348
349 free(priv, M_NETGRAPH_PRED1);
350 NG_NODE_SET_PRIVATE(node, NULL);
351 NG_NODE_UNREF(node); /* Let the node escape. */
352 return (0);
353 }
354
355 /*
356 * Hook disconnection
357 */
358 static int
ng_pred1_disconnect(hook_p hook)359 ng_pred1_disconnect(hook_p hook)
360 {
361 const node_p node = NG_HOOK_NODE(hook);
362
363 Pred1Init(node);
364
365 /* Go away if no longer connected. */
366 if ((NG_NODE_NUMHOOKS(node) == 0) && NG_NODE_IS_VALID(node))
367 ng_rmnode_self(node);
368 return (0);
369 }
370
371 /************************************************************************
372 HELPER STUFF
373 ************************************************************************/
374
375 /*
376 * Compress/encrypt a packet and put the result in a new mbuf at *resultp.
377 * The original mbuf is not free'd.
378 */
379 static int
ng_pred1_compress(node_p node,struct mbuf * m,struct mbuf ** resultp)380 ng_pred1_compress(node_p node, struct mbuf *m, struct mbuf **resultp)
381 {
382 const priv_p priv = NG_NODE_PRIVATE(node);
383 int outlen, inlen;
384 u_char *out;
385 uint16_t fcs, lenn;
386 int len;
387
388 /* Initialize. */
389 *resultp = NULL;
390
391 inlen = m->m_pkthdr.len;
392
393 priv->stats.FramesPlain++;
394 priv->stats.InOctets += inlen;
395
396 /* Reserve space for expansion. */
397 if (inlen > (PRED1_BUF_SIZE*8/9 + 1 + 4)) {
398 priv->stats.Errors++;
399 NG_FREE_M(m);
400 return (ENOMEM);
401 }
402
403 /* We must own the mbuf chain exclusively to modify it. */
404 m = m_unshare(m, M_NOWAIT);
405 if (m == NULL) {
406 priv->stats.Errors++;
407 return (ENOMEM);
408 }
409
410 /* Work with contiguous regions of memory. */
411 m_copydata(m, 0, inlen, (caddr_t)(priv->inbuf + 2));
412
413 lenn = htons(inlen & 0x7FFF);
414
415 /* Compute FCS. */
416 fcs = Crc16(PPP_INITFCS, (u_char *)&lenn, 2);
417 fcs = Crc16(fcs, priv->inbuf + 2, inlen);
418 fcs = ~fcs;
419
420 /* Compress data. */
421 len = Pred1Compress(node, priv->inbuf + 2, priv->outbuf + 2, inlen);
422
423 /* What happened? */
424 if (len < inlen) {
425 out = priv->outbuf;
426 outlen = 2 + len;
427 *(uint16_t *)out = lenn;
428 *out |= 0x80;
429 priv->stats.FramesComp++;
430 } else {
431 out = priv->inbuf;
432 outlen = 2 + inlen;
433 *(uint16_t *)out = lenn;
434 priv->stats.FramesUncomp++;
435 }
436
437 /* Add FCS. */
438 (out + outlen)[0] = fcs & 0xFF;
439 (out + outlen)[1] = fcs >> 8;
440
441 /* Calculate resulting size. */
442 outlen += 2;
443
444 /* Return packet in an mbuf. */
445 m_copyback(m, 0, outlen, (caddr_t)out);
446 if (m->m_pkthdr.len < outlen) {
447 m_freem(m);
448 priv->stats.Errors++;
449 return (ENOMEM);
450 } else if (outlen < m->m_pkthdr.len)
451 m_adj(m, outlen - m->m_pkthdr.len);
452 *resultp = m;
453 priv->stats.OutOctets += outlen;
454
455 return (0);
456 }
457
458 /*
459 * Decompress/decrypt packet and put the result in a new mbuf at *resultp.
460 * The original mbuf is not free'd.
461 */
462 static int
ng_pred1_decompress(node_p node,struct mbuf * m,struct mbuf ** resultp)463 ng_pred1_decompress(node_p node, struct mbuf *m, struct mbuf **resultp)
464 {
465 const priv_p priv = NG_NODE_PRIVATE(node);
466 int inlen;
467 uint16_t len, len1, cf, lenn;
468 uint16_t fcs;
469
470 /* Initialize. */
471 *resultp = NULL;
472
473 inlen = m->m_pkthdr.len;
474
475 if (inlen > PRED1_BUF_SIZE) {
476 priv->stats.Errors++;
477 NG_FREE_M(m);
478 return (ENOMEM);
479 }
480
481 /* We must own the mbuf chain exclusively to modify it. */
482 m = m_unshare(m, M_NOWAIT);
483 if (m == NULL) {
484 priv->stats.Errors++;
485 return (ENOMEM);
486 }
487
488 /* Work with contiguous regions of memory. */
489 m_copydata(m, 0, inlen, (caddr_t)priv->inbuf);
490
491 priv->stats.InOctets += inlen;
492
493 /* Get initial length value. */
494 len = priv->inbuf[0] << 8;
495 len += priv->inbuf[1];
496
497 cf = (len & 0x8000);
498 len &= 0x7fff;
499
500 /* Is data compressed or not really? */
501 if (cf) {
502 priv->stats.FramesComp++;
503 len1 = Pred1Decompress(node, priv->inbuf + 2, priv->outbuf,
504 inlen - 4, PRED1_BUF_SIZE);
505 if (len != len1) {
506 /* Error is detected. Send reset request */
507 m_freem(m);
508 priv->stats.Errors++;
509 log(LOG_NOTICE, "ng_pred1: Comp length error (%d) "
510 "--> len (%d)\n", len, len1);
511 return (EIO);
512 }
513
514 /*
515 * CRC check on receive is defined in RFC. It is surely required
516 * for compressed frames to signal dictionary corruption,
517 * but it is actually useless for uncompressed frames because
518 * the same check has already done by HDLC and/or other layer.
519 */
520 lenn = htons(len);
521 fcs = Crc16(PPP_INITFCS, (u_char *)&lenn, 2);
522 fcs = Crc16(fcs, priv->outbuf, len);
523 fcs = Crc16(fcs, priv->inbuf + inlen - 2, 2);
524
525 if (fcs != PPP_GOODFCS) {
526 m_freem(m);
527 priv->stats.Errors++;
528 log(LOG_NOTICE, "ng_pred1: Pred1: Bad CRC-16\n");
529 return (EIO);
530 }
531
532 /* Return packet in an mbuf. */
533 m_copyback(m, 0, len, (caddr_t)priv->outbuf);
534 if (m->m_pkthdr.len < len) {
535 m_freem(m);
536 priv->stats.Errors++;
537 return (ENOMEM);
538 } else if (len < m->m_pkthdr.len)
539 m_adj(m, len - m->m_pkthdr.len);
540 *resultp = m;
541
542 } else {
543 priv->stats.FramesUncomp++;
544 if (len != (inlen - 4)) {
545 /* Wrong length. Send reset request */
546 priv->stats.Errors++;
547 log(LOG_NOTICE, "ng_pred1: Uncomp length error (%d) "
548 "--> len (%d)\n", len, inlen - 4);
549 NG_FREE_M(m);
550 return (EIO);
551 }
552 Pred1SyncTable(node, priv->inbuf + 2, len);
553 m_adj(m, 2); /* Strip length. */
554 m_adj(m, -2); /* Strip fcs. */
555 *resultp = m;
556 }
557
558 priv->stats.FramesPlain++;
559 priv->stats.OutOctets += len;
560
561 return (0);
562 }
563
564 /*
565 * Pred1Init()
566 */
567
568 static void
Pred1Init(node_p node)569 Pred1Init(node_p node)
570 {
571 const priv_p priv = NG_NODE_PRIVATE(node);
572
573 priv->Hash = 0;
574 memset(priv->GuessTable, 0, PRED1_TABLE_SIZE);
575 }
576
577 /*
578 * Pred1Compress()
579 */
580
581 static int
Pred1Compress(node_p node,u_char * source,u_char * dest,int len)582 Pred1Compress(node_p node, u_char *source, u_char *dest, int len)
583 {
584 const priv_p priv = NG_NODE_PRIVATE(node);
585 int i;
586 u_char flags;
587 u_char *flagdest, *orgdest;
588
589 orgdest = dest;
590 while (len) {
591 flagdest = dest++;
592 flags = 0; /* All guesses are wrong initially. */
593 for (i = 0; i < 8 && len; i++) {
594 if (priv->GuessTable[priv->Hash] == *source)
595 /* Guess was right - don't output. */
596 flags |= (1 << i);
597 else {
598 /* Guess wrong, output char. */
599 priv->GuessTable[priv->Hash] = *source;
600 *dest++ = *source;
601 }
602 HASH(*source++);
603 len--;
604 }
605 *flagdest = flags;
606 }
607 return (dest - orgdest);
608 }
609
610 /*
611 * Pred1Decompress()
612 *
613 * Returns decompressed size, or -1 if we ran out of space.
614 */
615
616 static int
Pred1Decompress(node_p node,u_char * source,u_char * dest,int slen,int dlen)617 Pred1Decompress(node_p node, u_char *source, u_char *dest, int slen, int dlen)
618 {
619 const priv_p priv = NG_NODE_PRIVATE(node);
620 int i;
621 u_char flags, *orgdest;
622
623 orgdest = dest;
624 while (slen) {
625 flags = *source++;
626 slen--;
627 for (i = 0; i < 8; i++, flags >>= 1) {
628 if (dlen <= 0)
629 return(-1);
630 if (flags & 0x01)
631 /* Guess correct */
632 *dest = priv->GuessTable[priv->Hash];
633 else {
634 if (!slen)
635 /* We seem to be really done -- cabo. */
636 break;
637
638 /* Guess wrong. */
639 priv->GuessTable[priv->Hash] = *source;
640 /* Read from source. */
641 *dest = *source++;
642 slen--;
643 }
644 HASH(*dest++);
645 dlen--;
646 }
647 }
648 return (dest - orgdest);
649 }
650
651 /*
652 * Pred1SyncTable()
653 */
654
655 static void
Pred1SyncTable(node_p node,u_char * source,int len)656 Pred1SyncTable(node_p node, u_char *source, int len)
657 {
658 const priv_p priv = NG_NODE_PRIVATE(node);
659
660 while (len--) {
661 priv->GuessTable[priv->Hash] = *source;
662 HASH(*source++);
663 }
664 }
665
666 /*
667 * Crc16()
668 *
669 * Compute the 16 bit frame check value, per RFC 1171 Appendix B,
670 * on an array of bytes.
671 */
672
673 static uint16_t
Crc16(uint16_t crc,u_char * cp,int len)674 Crc16(uint16_t crc, u_char *cp, int len)
675 {
676 while (len--)
677 crc = (crc >> 8) ^ Crc16Table[(crc ^ *cp++) & 0xff];
678 return (crc);
679 }
680
681 static const uint16_t Crc16Table[256] = {
682 /* 00 */ 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
683 /* 08 */ 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
684 /* 10 */ 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
685 /* 18 */ 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
686 /* 20 */ 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
687 /* 28 */ 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
688 /* 30 */ 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
689 /* 38 */ 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
690 /* 40 */ 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
691 /* 48 */ 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
692 /* 50 */ 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
693 /* 58 */ 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
694 /* 60 */ 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
695 /* 68 */ 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
696 /* 70 */ 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
697 /* 78 */ 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
698 /* 80 */ 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
699 /* 88 */ 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
700 /* 90 */ 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
701 /* 98 */ 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
702 /* a0 */ 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
703 /* a8 */ 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
704 /* b0 */ 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
705 /* b8 */ 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
706 /* c0 */ 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
707 /* c8 */ 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
708 /* d0 */ 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
709 /* d8 */ 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
710 /* e0 */ 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
711 /* e8 */ 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
712 /* f0 */ 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
713 /* f8 */ 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
714 };
715