xref: /dragonfly/sys/netgraph7/ng_pred1.c (revision 36a3d1d6) 
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  * $DragonFly: src/sys/netgraph7/ng_pred1.c,v 1.2 2008/06/26 23:05:35 dillon Exp $
29  */
30 
31 /*
32  * Predictor-1 PPP compression netgraph node type.
33  */
34 
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/mbuf.h>
39 #include <sys/malloc.h>
40 #include <sys/errno.h>
41 #include <sys/syslog.h>
42 
43 #include "ng_message.h"
44 #include "netgraph.h"
45 #include "ng_parse.h"
46 #include "ng_pred1.h"
47 
48 #include "opt_netgraph.h"
49 
50 MALLOC_DEFINE(M_NETGRAPH_PRED1, "netgraph_pred1", "netgraph pred1 node ");
51 
52 /* PRED1 header length */
53 #define PRED1_HDRLEN		2
54 
55 #define PRED1_TABLE_SIZE	0x10000
56 #define PRED1_BUF_SIZE		4096
57 #define PPP_INITFCS		0xffff  /* Initial FCS value */
58 #define PPP_GOODFCS		0xf0b8  /* Good final FCS value */
59 
60 /*
61  * The following hash code is the heart of the algorithm:
62  * it builds a sliding hash sum of the previous 3-and-a-bit
63  * characters which will be used to index the guess table.
64  * A better hash function would result in additional compression,
65  * at the expense of time.
66  */
67 
68 #define HASH(x) priv->Hash = (priv->Hash << 4) ^ (x)
69 
70 /* Node private data */
71 struct ng_pred1_private {
72 	struct ng_pred1_config cfg;		/* configuration */
73 	u_char		GuessTable[PRED1_TABLE_SIZE];	/* dictionary */
74 	u_char		inbuf[PRED1_BUF_SIZE];	/* input buffer */
75 	u_char		outbuf[PRED1_BUF_SIZE];	/* output buffer */
76 	struct ng_pred1_stats stats;		/* statistics */
77 	uint16_t	Hash;
78 	ng_ID_t		ctrlnode;		/* path to controlling node */
79 	uint16_t	seqnum;			/* sequence number */
80 	u_char		compress;		/* compress/decompress flag */
81 };
82 typedef struct ng_pred1_private *priv_p;
83 
84 /* Netgraph node methods */
85 static ng_constructor_t	ng_pred1_constructor;
86 static ng_rcvmsg_t	ng_pred1_rcvmsg;
87 static ng_shutdown_t	ng_pred1_shutdown;
88 static ng_newhook_t	ng_pred1_newhook;
89 static ng_rcvdata_t	ng_pred1_rcvdata;
90 static ng_disconnect_t	ng_pred1_disconnect;
91 
92 /* Helper functions */
93 static int	ng_pred1_compress(node_p node, struct mbuf *m,
94 		    struct mbuf **resultp);
95 static int	ng_pred1_decompress(node_p node, struct mbuf *m,
96 		    struct mbuf **resultp);
97 static void	Pred1Init(node_p node);
98 static int	Pred1Compress(node_p node, u_char *source, u_char *dest,
99 		    int len);
100 static int	Pred1Decompress(node_p node, u_char *source, u_char *dest,
101 		    int slen, int dlen);
102 static void	Pred1SyncTable(node_p node, u_char *source, int len);
103 static uint16_t	Crc16(uint16_t fcs, u_char *cp, int len);
104 
105 static const uint16_t	Crc16Table[];
106 
107 /* Parse type for struct ng_pred1_config. */
108 static const struct ng_parse_struct_field ng_pred1_config_type_fields[]
109 	= NG_PRED1_CONFIG_INFO;
110 static const struct ng_parse_type ng_pred1_config_type = {
111 	&ng_parse_struct_type,
112 	ng_pred1_config_type_fields
113 };
114 
115 /* Parse type for struct ng_pred1_stat. */
116 static const struct ng_parse_struct_field ng_pred1_stats_type_fields[]
117 	= NG_PRED1_STATS_INFO;
118 static const struct ng_parse_type ng_pred1_stat_type = {
119 	&ng_parse_struct_type,
120 	ng_pred1_stats_type_fields
121 };
122 
123 /* List of commands and how to convert arguments to/from ASCII. */
124 static const struct ng_cmdlist ng_pred1_cmds[] = {
125 	{
126 	  NGM_PRED1_COOKIE,
127 	  NGM_PRED1_CONFIG,
128 	  "config",
129 	  &ng_pred1_config_type,
130 	  NULL
131 	},
132 	{
133 	  NGM_PRED1_COOKIE,
134 	  NGM_PRED1_RESETREQ,
135 	  "resetreq",
136 	  NULL,
137 	  NULL
138 	},
139 	{
140 	  NGM_PRED1_COOKIE,
141 	  NGM_PRED1_GET_STATS,
142 	  "getstats",
143 	  NULL,
144 	  &ng_pred1_stat_type
145 	},
146 	{
147 	  NGM_PRED1_COOKIE,
148 	  NGM_PRED1_CLR_STATS,
149 	  "clrstats",
150 	  NULL,
151 	  NULL
152 	},
153 	{
154 	  NGM_PRED1_COOKIE,
155 	  NGM_PRED1_GETCLR_STATS,
156 	  "getclrstats",
157 	  NULL,
158 	  &ng_pred1_stat_type
159 	},
160 	{ 0 }
161 };
162 
163 /* Node type descriptor */
164 static struct ng_type ng_pred1_typestruct = {
165 	.version =	NG_ABI_VERSION,
166 	.name =		NG_PRED1_NODE_TYPE,
167 	.constructor =	ng_pred1_constructor,
168 	.rcvmsg =	ng_pred1_rcvmsg,
169 	.shutdown =	ng_pred1_shutdown,
170 	.newhook =	ng_pred1_newhook,
171 	.rcvdata =	ng_pred1_rcvdata,
172 	.disconnect =	ng_pred1_disconnect,
173 	.cmdlist =	ng_pred1_cmds,
174 };
175 NETGRAPH_INIT(pred1, &ng_pred1_typestruct);
176 
177 #define ERROUT(x)	do { error = (x); goto done; } while (0)
178 
179 /************************************************************************
180 			NETGRAPH NODE STUFF
181  ************************************************************************/
182 
183 /*
184  * Node type constructor
185  */
186 static int
187 ng_pred1_constructor(node_p node)
188 {
189 	priv_p priv;
190 
191 	/* Allocate private structure. */
192 	priv = kmalloc(sizeof(*priv), M_NETGRAPH_PRED1, M_WAITOK | M_ZERO);
193 
194 	NG_NODE_SET_PRIVATE(node, priv);
195 
196 	/* This node is not thread safe. */
197 	NG_NODE_FORCE_WRITER(node);
198 
199 	/* Done */
200 	return (0);
201 }
202 
203 /*
204  * Give our OK for a hook to be added.
205  */
206 static int
207 ng_pred1_newhook(node_p node, hook_p hook, const char *name)
208 {
209 	const priv_p priv = NG_NODE_PRIVATE(node);
210 
211 	if (NG_NODE_NUMHOOKS(node) > 0)
212 		return (EINVAL);
213 
214 	if (strcmp(name, NG_PRED1_HOOK_COMP) == 0)
215 		priv->compress = 1;
216 	else if (strcmp(name, NG_PRED1_HOOK_DECOMP) == 0)
217 		priv->compress = 0;
218 	else
219 		return (EINVAL);
220 
221 	return (0);
222 }
223 
224 /*
225  * Receive a control message.
226  */
227 static int
228 ng_pred1_rcvmsg(node_p node, item_p item, hook_p lasthook)
229 {
230 	const priv_p priv = NG_NODE_PRIVATE(node);
231 	struct ng_mesg *resp = NULL;
232 	int error = 0;
233 	struct ng_mesg *msg;
234 
235 	NGI_GET_MSG(item, msg);
236 
237 	if (msg->header.typecookie != NGM_PRED1_COOKIE)
238 		ERROUT(EINVAL);
239 
240 	switch (msg->header.cmd) {
241 	case NGM_PRED1_CONFIG:
242 	    {
243 		struct ng_pred1_config *const cfg =
244 		    (struct ng_pred1_config *)msg->data;
245 
246 		/* Check configuration. */
247 		if (msg->header.arglen != sizeof(*cfg))
248 			ERROUT(EINVAL);
249 
250 		/* Configuration is OK, reset to it. */
251 		priv->cfg = *cfg;
252 
253 		/* Save return address so we can send reset-req's. */
254 		priv->ctrlnode = NGI_RETADDR(item);
255 
256 		/* Clear our state. */
257 		Pred1Init(node);
258 
259 		break;
260 	    }
261 	case NGM_PRED1_RESETREQ:
262 		Pred1Init(node);
263 		break;
264 
265 	case NGM_PRED1_GET_STATS:
266 	case NGM_PRED1_CLR_STATS:
267 	case NGM_PRED1_GETCLR_STATS:
268 	    {
269 		/* Create response. */
270 		if (msg->header.cmd != NGM_PRED1_CLR_STATS) {
271 			NG_MKRESPONSE(resp, msg,
272 			    sizeof(struct ng_pred1_stats), M_WAITOK | M_NULLOK);
273 			if (resp == NULL)
274 				ERROUT(ENOMEM);
275 			bcopy(&priv->stats, resp->data,
276 			    sizeof(struct ng_pred1_stats));
277 		}
278 
279 		if (msg->header.cmd != NGM_PRED1_GET_STATS)
280 			bzero(&priv->stats, sizeof(struct ng_pred1_stats));
281 		break;
282 	    }
283 
284 	default:
285 		error = EINVAL;
286 		break;
287 	}
288 done:
289 	NG_RESPOND_MSG(error, node, item, resp);
290 	NG_FREE_MSG(msg);
291 	return (error);
292 }
293 
294 /*
295  * Receive incoming data on our hook.
296  */
297 static int
298 ng_pred1_rcvdata(hook_p hook, item_p item)
299 {
300 	const node_p node = NG_HOOK_NODE(hook);
301 	const priv_p priv = NG_NODE_PRIVATE(node);
302 	struct mbuf *m, *out;
303 	int error;
304 
305 	if (!priv->cfg.enable) {
306 		NG_FREE_ITEM(item);
307 		return (ENXIO);
308 	}
309 
310 	NGI_GET_M(item, m);
311 	/* Compress. */
312 	if (priv->compress) {
313 		if ((error = ng_pred1_compress(node, m, &out)) != 0) {
314 			NG_FREE_ITEM(item);
315 			log(LOG_NOTICE, "%s: error: %d\n", __func__, error);
316 			return (error);
317 		}
318 
319 	} else { /* Decompress. */
320 		if ((error = ng_pred1_decompress(node, m, &out)) != 0) {
321 			NG_FREE_ITEM(item);
322 			log(LOG_NOTICE, "%s: error: %d\n", __func__, error);
323 			if (priv->ctrlnode != 0) {
324 				struct ng_mesg *msg;
325 
326 				/* Need to send a reset-request. */
327 				NG_MKMESSAGE(msg, NGM_PRED1_COOKIE,
328 				    NGM_PRED1_RESETREQ, 0, M_WAITOK | M_NULLOK);
329 				if (msg == NULL)
330 					return (error);
331 				NG_SEND_MSG_ID(error, node, msg,
332 				    priv->ctrlnode, 0);
333 			}
334 			return (error);
335 		}
336 	}
337 
338 	NG_FWD_NEW_DATA(error, item, hook, out);
339 	return (error);
340 }
341 
342 /*
343  * Destroy node.
344  */
345 static int
346 ng_pred1_shutdown(node_p node)
347 {
348 	const priv_p priv = NG_NODE_PRIVATE(node);
349 
350 	kfree(priv, M_NETGRAPH_PRED1);
351 	NG_NODE_SET_PRIVATE(node, NULL);
352 	NG_NODE_UNREF(node);		/* Let the node escape. */
353 	return (0);
354 }
355 
356 /*
357  * Hook disconnection
358  */
359 static int
360 ng_pred1_disconnect(hook_p hook)
361 {
362 	const node_p node = NG_HOOK_NODE(hook);
363 
364 	Pred1Init(node);
365 
366 	/* Go away if no longer connected. */
367 	if ((NG_NODE_NUMHOOKS(node) == 0) && NG_NODE_IS_VALID(node))
368 		ng_rmnode_self(node);
369 	return (0);
370 }
371 
372 /************************************************************************
373 			HELPER STUFF
374  ************************************************************************/
375 
376 /*
377  * Compress/encrypt a packet and put the result in a new mbuf at *resultp.
378  * The original mbuf is not free'd.
379  */
380 static int
381 ng_pred1_compress(node_p node, struct mbuf *m, struct mbuf **resultp)
382 {
383 	const priv_p 	priv = NG_NODE_PRIVATE(node);
384 	int 		outlen, inlen;
385 	u_char		*out;
386 	uint16_t	fcs, lenn;
387 	int		len;
388 
389 	/* Initialize. */
390 	*resultp = NULL;
391 
392 	inlen = m->m_pkthdr.len;
393 
394 	priv->stats.FramesPlain++;
395 	priv->stats.InOctets += inlen;
396 
397 	/* Reserve space for expansion. */
398 	if (inlen > (PRED1_BUF_SIZE*8/9 + 1 + 4)) {
399 		priv->stats.Errors++;
400 		NG_FREE_M(m);
401 		return (ENOMEM);
402 	}
403 
404 	/* Work with contiguous regions of memory. */
405 	m_copydata(m, 0, inlen, (caddr_t)(priv->inbuf + 2));
406 
407 	NG_FREE_M(m);
408 
409 	lenn = htons(inlen & 0x7FFF);
410 
411 	/* Compute FCS. */
412 	fcs = Crc16(PPP_INITFCS, (u_char *)&lenn, 2);
413 	fcs = Crc16(fcs, priv->inbuf + 2, inlen);
414 	fcs = ~fcs;
415 
416 	/* Compress data. */
417 	len = Pred1Compress(node, priv->inbuf + 2, priv->outbuf + 2, inlen);
418 
419 	/* What happened? */
420 	if (len < inlen) {
421 		out = priv->outbuf;
422 		outlen = 2 + len;
423 		*(uint16_t *)out = lenn;
424 		*out |= 0x80;
425 		priv->stats.FramesComp++;
426 	} else {
427 		out = priv->inbuf;
428 		outlen = 2 + inlen;
429 		*(uint16_t *)out = lenn;
430 		priv->stats.FramesUncomp++;
431 	}
432 
433 	/* Add FCS. */
434 	(out + outlen)[0] = fcs & 0xFF;
435 	(out + outlen)[1] = fcs >> 8;
436 
437 	/* Calculate resulting size. */
438 	outlen += 2;
439 
440 	/* Return packet in an mbuf. */
441 	*resultp = m_devget((caddr_t)out, outlen, 0, NULL, NULL);
442 	if (*resultp == NULL) {
443 	    priv->stats.Errors++;
444 	    return (ENOMEM);
445 	};
446 
447 	priv->stats.OutOctets += outlen;
448 
449 	return (0);
450 }
451 
452 /*
453  * Decompress/decrypt packet and put the result in a new mbuf at *resultp.
454  * The original mbuf is not free'd.
455  */
456 static int
457 ng_pred1_decompress(node_p node, struct mbuf *m, struct mbuf **resultp)
458 {
459 	const priv_p 	priv = NG_NODE_PRIVATE(node);
460 	int 		inlen;
461 	uint16_t	len, len1, cf, lenn;
462 	uint16_t	fcs;
463 
464 	/* Initialize. */
465 	*resultp = NULL;
466 
467 	inlen = m->m_pkthdr.len;
468 
469 	if (inlen > PRED1_BUF_SIZE) {
470 		priv->stats.Errors++;
471 		NG_FREE_M(m);
472 		return (ENOMEM);
473 	}
474 
475 	/* Work with contiguous regions of memory. */
476 	m_copydata(m, 0, inlen, (caddr_t)priv->inbuf);
477 
478 	priv->stats.InOctets += inlen;
479 
480 	/* Get initial length value. */
481 	len = priv->inbuf[0] << 8;
482 	len += priv->inbuf[1];
483 
484 	cf = (len & 0x8000);
485 	len &= 0x7fff;
486 
487 	/* Is data compressed or not really? */
488 	if (cf) {
489 		NG_FREE_M(m);
490 
491 		priv->stats.FramesComp++;
492 		len1 = Pred1Decompress(node, priv->inbuf + 2, priv->outbuf,
493 		    inlen - 4, PRED1_BUF_SIZE);
494 		if (len != len1) {
495 			/* Error is detected. Send reset request */
496 			priv->stats.Errors++;
497 			log(LOG_NOTICE, "ng_pred1: Comp length error (%d) "
498 			    "--> len (%d)\n", len, len1);
499 			return (EIO);
500 		}
501 
502 		/*
503 		 * CRC check on receive is defined in RFC. It is surely required
504 		 * for compressed frames to signal dictionary corruption,
505 		 * but it is actually useless for uncompressed frames because
506 		 * the same check has already done by HDLC and/or other layer.
507 		 */
508 		lenn = htons(len);
509 		fcs = Crc16(PPP_INITFCS, (u_char *)&lenn, 2);
510 		fcs = Crc16(fcs, priv->outbuf, len);
511 		fcs = Crc16(fcs, priv->inbuf + inlen - 2, 2);
512 
513 		if (fcs != PPP_GOODFCS) {
514 			priv->stats.Errors++;
515 	    		log(LOG_NOTICE, "ng_pred1: Pred1: Bad CRC-16\n");
516 			return (EIO);
517 		}
518 
519 		/* Return packet in an mbuf. */
520 		*resultp = m_devget((caddr_t)priv->outbuf, len, 0, NULL, NULL);
521 		if (*resultp == NULL) {
522 			priv->stats.Errors++;
523 			return (ENOMEM);
524 		};
525 
526 	} else {
527 		priv->stats.FramesUncomp++;
528 		if (len != (inlen - 4)) {
529 			/* Wrong length. Send reset request */
530 			priv->stats.Errors++;
531 			log(LOG_NOTICE, "ng_pred1: Uncomp length error (%d) "
532 			    "--> len (%d)\n", len, inlen - 4);
533 			NG_FREE_M(m);
534 			return (EIO);
535 		}
536 		Pred1SyncTable(node, priv->inbuf + 2, len);
537 		m_adj(m, 2);	/* Strip length. */
538 		m_adj(m, -2);	/* Strip fcs. */
539 		*resultp = m;
540 	}
541 
542 	priv->stats.FramesPlain++;
543 	priv->stats.OutOctets += len;
544 
545 	return (0);
546 }
547 
548 /*
549  * Pred1Init()
550  */
551 
552 static void
553 Pred1Init(node_p node)
554 {
555 	const priv_p priv = NG_NODE_PRIVATE(node);
556 
557 	priv->Hash = 0;
558 	memset(priv->GuessTable, 0, PRED1_TABLE_SIZE);
559 }
560 
561 /*
562  * Pred1Compress()
563  */
564 
565 static int
566 Pred1Compress(node_p node, u_char *source, u_char *dest, int len)
567 {
568 	const priv_p 	priv = NG_NODE_PRIVATE(node);
569 	int		i;
570 	u_char		flags;
571 	u_char		*flagdest, *orgdest;
572 
573 	orgdest = dest;
574 	while (len) {
575 		flagdest = dest++;
576 		flags = 0;	/* All guesses are wrong initially. */
577 		for (i = 0; i < 8 && len; i++) {
578     			if (priv->GuessTable[priv->Hash] == *source)
579 				/* Guess was right - don't output. */
580 				flags |= (1 << i);
581     			else {
582 				/* Guess wrong, output char. */
583 				priv->GuessTable[priv->Hash] = *source;
584 				*dest++ = *source;
585     			}
586     			HASH(*source++);
587     			len--;
588 		}
589 		*flagdest = flags;
590 	}
591 	return (dest - orgdest);
592 }
593 
594 /*
595  * Pred1Decompress()
596  *
597  * Returns decompressed size, or -1 if we ran out of space.
598  */
599 
600 static int
601 Pred1Decompress(node_p node, u_char *source, u_char *dest, int slen, int dlen)
602 {
603 	const priv_p 	priv = NG_NODE_PRIVATE(node);
604 	int		i;
605 	u_char		flags, *orgdest;
606 
607 	orgdest = dest;
608 	while (slen) {
609 		flags = *source++;
610 		slen--;
611 		for (i = 0; i < 8; i++, flags >>= 1) {
612 			if (dlen <= 0)
613 				return(-1);
614 			if (flags & 0x01)
615 				/* Guess correct */
616 				*dest = priv->GuessTable[priv->Hash];
617 			else {
618 				if (!slen)
619 					/* We seem to be really done -- cabo. */
620 					break;
621 
622 				/* Guess wrong. */
623 				priv->GuessTable[priv->Hash] = *source;
624 				/* Read from source. */
625 				*dest = *source++;
626 				slen--;
627 			}
628 			HASH(*dest++);
629 			dlen--;
630 		}
631 	}
632 	return (dest - orgdest);
633 }
634 
635 /*
636  * Pred1SyncTable()
637  */
638 
639 static void
640 Pred1SyncTable(node_p node, u_char *source, int len)
641 {
642 	const priv_p priv = NG_NODE_PRIVATE(node);
643 
644 	while (len--) {
645 		priv->GuessTable[priv->Hash] = *source;
646 		HASH(*source++);
647 	}
648 }
649 
650 /*
651  * Crc16()
652  *
653  * Compute the 16 bit frame check value, per RFC 1171 Appendix B,
654  * on an array of bytes.
655  */
656 
657 static uint16_t
658 Crc16(uint16_t crc, u_char *cp, int len)
659 {
660 	while (len--)
661 		crc = (crc >> 8) ^ Crc16Table[(crc ^ *cp++) & 0xff];
662 	return (crc);
663 }
664 
665 static const uint16_t Crc16Table[256] = {
666 /* 00 */    0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
667 /* 08 */    0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
668 /* 10 */    0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
669 /* 18 */    0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
670 /* 20 */    0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
671 /* 28 */    0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
672 /* 30 */    0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
673 /* 38 */    0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
674 /* 40 */    0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
675 /* 48 */    0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
676 /* 50 */    0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
677 /* 58 */    0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
678 /* 60 */    0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
679 /* 68 */    0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
680 /* 70 */    0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
681 /* 78 */    0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
682 /* 80 */    0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
683 /* 88 */    0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
684 /* 90 */    0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
685 /* 98 */    0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
686 /* a0 */    0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
687 /* a8 */    0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
688 /* b0 */    0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
689 /* b8 */    0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
690 /* c0 */    0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
691 /* c8 */    0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
692 /* d0 */    0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
693 /* d8 */    0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
694 /* e0 */    0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
695 /* e8 */    0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
696 /* f0 */    0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
697 /* f8 */    0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
698 };
699 
700