xref: /dragonfly/sys/netgraph7/ng_pred1.c (revision 03517d4e) 
1 /*-
2  * Copyright (c) 2006 Alexander Motin <mav@alkar.net>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice unmodified, this list of conditions, and the following
10  *    disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  *
27  * $FreeBSD: src/sys/netgraph/ng_pred1.c,v 1.3 2008/01/27 02:04:12 mav Exp $
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 "ng_message.h"
43 #include "netgraph.h"
44 #include "ng_parse.h"
45 #include "ng_pred1.h"
46 
47 #include "opt_netgraph.h"
48 
49 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
186 ng_pred1_constructor(node_p node)
187 {
188 	priv_p priv;
189 
190 	/* Allocate private structure. */
191 	priv = kmalloc(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
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
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_WAITOK | M_NULLOK);
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
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_WAITOK | M_NULLOK);
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
345 ng_pred1_shutdown(node_p node)
346 {
347 	const priv_p priv = NG_NODE_PRIVATE(node);
348 
349 	kfree(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
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
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 	/* Work with contiguous regions of memory. */
404 	m_copydata(m, 0, inlen, priv->inbuf + 2);
405 
406 	NG_FREE_M(m);
407 
408 	lenn = htons(inlen & 0x7FFF);
409 
410 	/* Compute FCS. */
411 	fcs = Crc16(PPP_INITFCS, (u_char *)&lenn, 2);
412 	fcs = Crc16(fcs, priv->inbuf + 2, inlen);
413 	fcs = ~fcs;
414 
415 	/* Compress data. */
416 	len = Pred1Compress(node, priv->inbuf + 2, priv->outbuf + 2, inlen);
417 
418 	/* What happened? */
419 	if (len < inlen) {
420 		out = priv->outbuf;
421 		outlen = 2 + len;
422 		*(uint16_t *)out = lenn;
423 		*out |= 0x80;
424 		priv->stats.FramesComp++;
425 	} else {
426 		out = priv->inbuf;
427 		outlen = 2 + inlen;
428 		*(uint16_t *)out = lenn;
429 		priv->stats.FramesUncomp++;
430 	}
431 
432 	/* Add FCS. */
433 	(out + outlen)[0] = fcs & 0xFF;
434 	(out + outlen)[1] = fcs >> 8;
435 
436 	/* Calculate resulting size. */
437 	outlen += 2;
438 
439 	/* Return packet in an mbuf. */
440 	*resultp = m_devget(out, outlen, 0, NULL);
441 	if (*resultp == NULL) {
442 	    priv->stats.Errors++;
443 	    return (ENOMEM);
444 	}
445 
446 	priv->stats.OutOctets += outlen;
447 
448 	return (0);
449 }
450 
451 /*
452  * Decompress/decrypt packet and put the result in a new mbuf at *resultp.
453  * The original mbuf is not free'd.
454  */
455 static int
456 ng_pred1_decompress(node_p node, struct mbuf *m, struct mbuf **resultp)
457 {
458 	const priv_p 	priv = NG_NODE_PRIVATE(node);
459 	int 		inlen;
460 	uint16_t	len, len1, cf, lenn;
461 	uint16_t	fcs;
462 
463 	/* Initialize. */
464 	*resultp = NULL;
465 
466 	inlen = m->m_pkthdr.len;
467 
468 	if (inlen > PRED1_BUF_SIZE) {
469 		priv->stats.Errors++;
470 		NG_FREE_M(m);
471 		return (ENOMEM);
472 	}
473 
474 	/* Work with contiguous regions of memory. */
475 	m_copydata(m, 0, inlen, priv->inbuf);
476 
477 	priv->stats.InOctets += inlen;
478 
479 	/* Get initial length value. */
480 	len = priv->inbuf[0] << 8;
481 	len += priv->inbuf[1];
482 
483 	cf = (len & 0x8000);
484 	len &= 0x7fff;
485 
486 	/* Is data compressed or not really? */
487 	if (cf) {
488 		NG_FREE_M(m);
489 
490 		priv->stats.FramesComp++;
491 		len1 = Pred1Decompress(node, priv->inbuf + 2, priv->outbuf,
492 		    inlen - 4, PRED1_BUF_SIZE);
493 		if (len != len1) {
494 			/* Error is detected. Send reset request */
495 			priv->stats.Errors++;
496 			log(LOG_NOTICE, "ng_pred1: Comp length error (%d) "
497 			    "--> len (%d)\n", len, len1);
498 			return (EIO);
499 		}
500 
501 		/*
502 		 * CRC check on receive is defined in RFC. It is surely required
503 		 * for compressed frames to signal dictionary corruption,
504 		 * but it is actually useless for uncompressed frames because
505 		 * the same check has already done by HDLC and/or other layer.
506 		 */
507 		lenn = htons(len);
508 		fcs = Crc16(PPP_INITFCS, (u_char *)&lenn, 2);
509 		fcs = Crc16(fcs, priv->outbuf, len);
510 		fcs = Crc16(fcs, priv->inbuf + inlen - 2, 2);
511 
512 		if (fcs != PPP_GOODFCS) {
513 			priv->stats.Errors++;
514 	    		log(LOG_NOTICE, "ng_pred1: Pred1: Bad CRC-16\n");
515 			return (EIO);
516 		}
517 
518 		/* Return packet in an mbuf. */
519 		*resultp = m_devget(priv->outbuf, len, 0, NULL);
520 		if (*resultp == NULL) {
521 			priv->stats.Errors++;
522 			return (ENOMEM);
523 		}
524 
525 	} else {
526 		priv->stats.FramesUncomp++;
527 		if (len != (inlen - 4)) {
528 			/* Wrong length. Send reset request */
529 			priv->stats.Errors++;
530 			log(LOG_NOTICE, "ng_pred1: Uncomp length error (%d) "
531 			    "--> len (%d)\n", len, inlen - 4);
532 			NG_FREE_M(m);
533 			return (EIO);
534 		}
535 		Pred1SyncTable(node, priv->inbuf + 2, len);
536 		m_adj(m, 2);	/* Strip length. */
537 		m_adj(m, -2);	/* Strip fcs. */
538 		*resultp = m;
539 	}
540 
541 	priv->stats.FramesPlain++;
542 	priv->stats.OutOctets += len;
543 
544 	return (0);
545 }
546 
547 /*
548  * Pred1Init()
549  */
550 
551 static void
552 Pred1Init(node_p node)
553 {
554 	const priv_p priv = NG_NODE_PRIVATE(node);
555 
556 	priv->Hash = 0;
557 	memset(priv->GuessTable, 0, PRED1_TABLE_SIZE);
558 }
559 
560 /*
561  * Pred1Compress()
562  */
563 
564 static int
565 Pred1Compress(node_p node, u_char *source, u_char *dest, int len)
566 {
567 	const priv_p 	priv = NG_NODE_PRIVATE(node);
568 	int		i;
569 	u_char		flags;
570 	u_char		*flagdest, *orgdest;
571 
572 	orgdest = dest;
573 	while (len) {
574 		flagdest = dest++;
575 		flags = 0;	/* All guesses are wrong initially. */
576 		for (i = 0; i < 8 && len; i++) {
577     			if (priv->GuessTable[priv->Hash] == *source)
578 				/* Guess was right - don't output. */
579 				flags |= (1 << i);
580     			else {
581 				/* Guess wrong, output char. */
582 				priv->GuessTable[priv->Hash] = *source;
583 				*dest++ = *source;
584     			}
585     			HASH(*source++);
586     			len--;
587 		}
588 		*flagdest = flags;
589 	}
590 	return (dest - orgdest);
591 }
592 
593 /*
594  * Pred1Decompress()
595  *
596  * Returns decompressed size, or -1 if we ran out of space.
597  */
598 
599 static int
600 Pred1Decompress(node_p node, u_char *source, u_char *dest, int slen, int dlen)
601 {
602 	const priv_p 	priv = NG_NODE_PRIVATE(node);
603 	int		i;
604 	u_char		flags, *orgdest;
605 
606 	orgdest = dest;
607 	while (slen) {
608 		flags = *source++;
609 		slen--;
610 		for (i = 0; i < 8; i++, flags >>= 1) {
611 			if (dlen <= 0)
612 				return(-1);
613 			if (flags & 0x01)
614 				/* Guess correct */
615 				*dest = priv->GuessTable[priv->Hash];
616 			else {
617 				if (!slen)
618 					/* We seem to be really done -- cabo. */
619 					break;
620 
621 				/* Guess wrong. */
622 				priv->GuessTable[priv->Hash] = *source;
623 				/* Read from source. */
624 				*dest = *source++;
625 				slen--;
626 			}
627 			HASH(*dest++);
628 			dlen--;
629 		}
630 	}
631 	return (dest - orgdest);
632 }
633 
634 /*
635  * Pred1SyncTable()
636  */
637 
638 static void
639 Pred1SyncTable(node_p node, u_char *source, int len)
640 {
641 	const priv_p priv = NG_NODE_PRIVATE(node);
642 
643 	while (len--) {
644 		priv->GuessTable[priv->Hash] = *source;
645 		HASH(*source++);
646 	}
647 }
648 
649 /*
650  * Crc16()
651  *
652  * Compute the 16 bit frame check value, per RFC 1171 Appendix B,
653  * on an array of bytes.
654  */
655 
656 static uint16_t
657 Crc16(uint16_t crc, u_char *cp, int len)
658 {
659 	while (len--)
660 		crc = (crc >> 8) ^ Crc16Table[(crc ^ *cp++) & 0xff];
661 	return (crc);
662 }
663 
664 static const uint16_t Crc16Table[256] = {
665 /* 00 */    0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
666 /* 08 */    0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
667 /* 10 */    0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
668 /* 18 */    0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
669 /* 20 */    0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
670 /* 28 */    0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
671 /* 30 */    0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
672 /* 38 */    0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
673 /* 40 */    0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
674 /* 48 */    0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
675 /* 50 */    0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
676 /* 58 */    0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
677 /* 60 */    0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
678 /* 68 */    0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
679 /* 70 */    0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
680 /* 78 */    0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
681 /* 80 */    0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
682 /* 88 */    0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
683 /* 90 */    0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
684 /* 98 */    0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
685 /* a0 */    0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
686 /* a8 */    0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
687 /* b0 */    0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
688 /* b8 */    0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
689 /* c0 */    0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
690 /* c8 */    0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
691 /* d0 */    0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
692 /* d8 */    0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
693 /* e0 */    0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
694 /* e8 */    0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
695 /* f0 */    0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
696 /* f8 */    0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
697 };
698 
699