1 /*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22 /* \summary: IP printer */
23
24 #ifdef HAVE_CONFIG_H
25 #include "config.h"
26 #endif
27
28 #include <netdissect-stdinc.h>
29
30 #include <string.h>
31
32 #include "netdissect.h"
33 #include "addrtoname.h"
34 #include "extract.h"
35
36 #include "ip.h"
37 #include "ipproto.h"
38
39 static const char tstr[] = "[|ip]";
40
41 static const struct tok ip_option_values[] = {
42 { IPOPT_EOL, "EOL" },
43 { IPOPT_NOP, "NOP" },
44 { IPOPT_TS, "timestamp" },
45 { IPOPT_SECURITY, "security" },
46 { IPOPT_RR, "RR" },
47 { IPOPT_SSRR, "SSRR" },
48 { IPOPT_LSRR, "LSRR" },
49 { IPOPT_RA, "RA" },
50 { IPOPT_RFC1393, "traceroute" },
51 { 0, NULL }
52 };
53
54 /*
55 * print the recorded route in an IP RR, LSRR or SSRR option.
56 */
57 static void
ip_printroute(netdissect_options * ndo,register const u_char * cp,u_int length)58 ip_printroute(netdissect_options *ndo,
59 register const u_char *cp, u_int length)
60 {
61 register u_int ptr;
62 register u_int len;
63
64 if (length < 3) {
65 ND_PRINT((ndo, " [bad length %u]", length));
66 return;
67 }
68 if ((length + 1) & 3)
69 ND_PRINT((ndo, " [bad length %u]", length));
70 ptr = cp[2] - 1;
71 if (ptr < 3 || ((ptr + 1) & 3) || ptr > length + 1)
72 ND_PRINT((ndo, " [bad ptr %u]", cp[2]));
73
74 for (len = 3; len < length; len += 4) {
75 ND_PRINT((ndo, " %s", ipaddr_string(ndo, &cp[len])));
76 if (ptr > len)
77 ND_PRINT((ndo, ","));
78 }
79 }
80
81 /*
82 * If source-routing is present and valid, return the final destination.
83 * Otherwise, return IP destination.
84 *
85 * This is used for UDP and TCP pseudo-header in the checksum
86 * calculation.
87 */
88 static uint32_t
ip_finddst(netdissect_options * ndo,const struct ip * ip)89 ip_finddst(netdissect_options *ndo,
90 const struct ip *ip)
91 {
92 int length;
93 int len;
94 const u_char *cp;
95 uint32_t retval;
96
97 cp = (const u_char *)(ip + 1);
98 length = (IP_HL(ip) << 2) - sizeof(struct ip);
99
100 for (; length > 0; cp += len, length -= len) {
101 int tt;
102
103 ND_TCHECK(*cp);
104 tt = *cp;
105 if (tt == IPOPT_EOL)
106 break;
107 else if (tt == IPOPT_NOP)
108 len = 1;
109 else {
110 ND_TCHECK(cp[1]);
111 len = cp[1];
112 if (len < 2)
113 break;
114 }
115 ND_TCHECK2(*cp, len);
116 switch (tt) {
117
118 case IPOPT_SSRR:
119 case IPOPT_LSRR:
120 if (len < 7)
121 break;
122 UNALIGNED_MEMCPY(&retval, cp + len - 4, 4);
123 return retval;
124 }
125 }
126 trunc:
127 UNALIGNED_MEMCPY(&retval, &ip->ip_dst, sizeof(uint32_t));
128 return retval;
129 }
130
131 /*
132 * Compute a V4-style checksum by building a pseudoheader.
133 */
134 int
nextproto4_cksum(netdissect_options * ndo,const struct ip * ip,const uint8_t * data,u_int len,u_int covlen,u_int next_proto)135 nextproto4_cksum(netdissect_options *ndo,
136 const struct ip *ip, const uint8_t *data,
137 u_int len, u_int covlen, u_int next_proto)
138 {
139 struct phdr {
140 uint32_t src;
141 uint32_t dst;
142 u_char mbz;
143 u_char proto;
144 uint16_t len;
145 } ph;
146 struct cksum_vec vec[2];
147
148 /* pseudo-header.. */
149 ph.len = htons((uint16_t)len);
150 ph.mbz = 0;
151 ph.proto = next_proto;
152 UNALIGNED_MEMCPY(&ph.src, &ip->ip_src, sizeof(uint32_t));
153 if (IP_HL(ip) == 5)
154 UNALIGNED_MEMCPY(&ph.dst, &ip->ip_dst, sizeof(uint32_t));
155 else
156 ph.dst = ip_finddst(ndo, ip);
157
158 vec[0].ptr = (const uint8_t *)(void *)&ph;
159 vec[0].len = sizeof(ph);
160 vec[1].ptr = data;
161 vec[1].len = covlen;
162 return (in_cksum(vec, 2));
163 }
164
165 static void
ip_printts(netdissect_options * ndo,register const u_char * cp,u_int length)166 ip_printts(netdissect_options *ndo,
167 register const u_char *cp, u_int length)
168 {
169 register u_int ptr;
170 register u_int len;
171 int hoplen;
172 const char *type;
173
174 if (length < 4) {
175 ND_PRINT((ndo, "[bad length %u]", length));
176 return;
177 }
178 ND_PRINT((ndo, " TS{"));
179 hoplen = ((cp[3]&0xF) != IPOPT_TS_TSONLY) ? 8 : 4;
180 if ((length - 4) & (hoplen-1))
181 ND_PRINT((ndo, "[bad length %u]", length));
182 ptr = cp[2] - 1;
183 len = 0;
184 if (ptr < 4 || ((ptr - 4) & (hoplen-1)) || ptr > length + 1)
185 ND_PRINT((ndo, "[bad ptr %u]", cp[2]));
186 switch (cp[3]&0xF) {
187 case IPOPT_TS_TSONLY:
188 ND_PRINT((ndo, "TSONLY"));
189 break;
190 case IPOPT_TS_TSANDADDR:
191 ND_PRINT((ndo, "TS+ADDR"));
192 break;
193 /*
194 * prespecified should really be 3, but some ones might send 2
195 * instead, and the IPOPT_TS_PRESPEC constant can apparently
196 * have both values, so we have to hard-code it here.
197 */
198
199 case 2:
200 ND_PRINT((ndo, "PRESPEC2.0"));
201 break;
202 case 3: /* IPOPT_TS_PRESPEC */
203 ND_PRINT((ndo, "PRESPEC"));
204 break;
205 default:
206 ND_PRINT((ndo, "[bad ts type %d]", cp[3]&0xF));
207 goto done;
208 }
209
210 type = " ";
211 for (len = 4; len < length; len += hoplen) {
212 if (ptr == len)
213 type = " ^ ";
214 ND_PRINT((ndo, "%s%d@%s", type, EXTRACT_32BITS(&cp[len+hoplen-4]),
215 hoplen!=8 ? "" : ipaddr_string(ndo, &cp[len])));
216 type = " ";
217 }
218
219 done:
220 ND_PRINT((ndo, "%s", ptr == len ? " ^ " : ""));
221
222 if (cp[3]>>4)
223 ND_PRINT((ndo, " [%d hops not recorded]} ", cp[3]>>4));
224 else
225 ND_PRINT((ndo, "}"));
226 }
227
228 /*
229 * print IP options.
230 */
231 static void
ip_optprint(netdissect_options * ndo,register const u_char * cp,u_int length)232 ip_optprint(netdissect_options *ndo,
233 register const u_char *cp, u_int length)
234 {
235 register u_int option_len;
236 const char *sep = "";
237
238 for (; length > 0; cp += option_len, length -= option_len) {
239 u_int option_code;
240
241 ND_PRINT((ndo, "%s", sep));
242 sep = ",";
243
244 ND_TCHECK(*cp);
245 option_code = *cp;
246
247 ND_PRINT((ndo, "%s",
248 tok2str(ip_option_values,"unknown %u",option_code)));
249
250 if (option_code == IPOPT_NOP ||
251 option_code == IPOPT_EOL)
252 option_len = 1;
253
254 else {
255 ND_TCHECK(cp[1]);
256 option_len = cp[1];
257 if (option_len < 2) {
258 ND_PRINT((ndo, " [bad length %u]", option_len));
259 return;
260 }
261 }
262
263 if (option_len > length) {
264 ND_PRINT((ndo, " [bad length %u]", option_len));
265 return;
266 }
267
268 ND_TCHECK2(*cp, option_len);
269
270 switch (option_code) {
271 case IPOPT_EOL:
272 return;
273
274 case IPOPT_TS:
275 ip_printts(ndo, cp, option_len);
276 break;
277
278 case IPOPT_RR: /* fall through */
279 case IPOPT_SSRR:
280 case IPOPT_LSRR:
281 ip_printroute(ndo, cp, option_len);
282 break;
283
284 case IPOPT_RA:
285 if (option_len < 4) {
286 ND_PRINT((ndo, " [bad length %u]", option_len));
287 break;
288 }
289 ND_TCHECK(cp[3]);
290 if (EXTRACT_16BITS(&cp[2]) != 0)
291 ND_PRINT((ndo, " value %u", EXTRACT_16BITS(&cp[2])));
292 break;
293
294 case IPOPT_NOP: /* nothing to print - fall through */
295 case IPOPT_SECURITY:
296 default:
297 break;
298 }
299 }
300 return;
301
302 trunc:
303 ND_PRINT((ndo, "%s", tstr));
304 }
305
306 #define IP_RES 0x8000
307
308 static const struct tok ip_frag_values[] = {
309 { IP_MF, "+" },
310 { IP_DF, "DF" },
311 { IP_RES, "rsvd" }, /* The RFC3514 evil ;-) bit */
312 { 0, NULL }
313 };
314
315 struct ip_print_demux_state {
316 const struct ip *ip;
317 const u_char *cp;
318 u_int len, off;
319 u_char nh;
320 int advance;
321 };
322
323 static void
ip_print_demux(netdissect_options * ndo,struct ip_print_demux_state * ipds)324 ip_print_demux(netdissect_options *ndo,
325 struct ip_print_demux_state *ipds)
326 {
327 struct protoent *proto;
328
329 again:
330 switch (ipds->nh) {
331
332 case IPPROTO_AH:
333 if (!ND_TTEST(*ipds->cp)) {
334 ND_PRINT((ndo, "[|AH]"));
335 break;
336 }
337 ipds->nh = *ipds->cp;
338 ipds->advance = ah_print(ndo, ipds->cp);
339 if (ipds->advance <= 0)
340 break;
341 ipds->cp += ipds->advance;
342 ipds->len -= ipds->advance;
343 goto again;
344
345 case IPPROTO_ESP:
346 {
347 int enh, padlen;
348 ipds->advance = esp_print(ndo, ipds->cp, ipds->len,
349 (const u_char *)ipds->ip,
350 &enh, &padlen);
351 if (ipds->advance <= 0)
352 break;
353 ipds->cp += ipds->advance;
354 ipds->len -= ipds->advance + padlen;
355 ipds->nh = enh & 0xff;
356 goto again;
357 }
358
359 case IPPROTO_IPCOMP:
360 {
361 ipcomp_print(ndo, ipds->cp);
362 /*
363 * Either this has decompressed the payload and
364 * printed it, in which case there's nothing more
365 * to do, or it hasn't, in which case there's
366 * nothing more to do.
367 */
368 break;
369 }
370
371 case IPPROTO_SCTP:
372 sctp_print(ndo, ipds->cp, (const u_char *)ipds->ip, ipds->len);
373 break;
374
375 case IPPROTO_DCCP:
376 dccp_print(ndo, ipds->cp, (const u_char *)ipds->ip, ipds->len);
377 break;
378
379 case IPPROTO_TCP:
380 /* pass on the MF bit plus the offset to detect fragments */
381 tcp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
382 ipds->off & (IP_MF|IP_OFFMASK));
383 break;
384
385 case IPPROTO_UDP:
386 /* pass on the MF bit plus the offset to detect fragments */
387 udp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
388 ipds->off & (IP_MF|IP_OFFMASK));
389 break;
390
391 case IPPROTO_ICMP:
392 /* pass on the MF bit plus the offset to detect fragments */
393 icmp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
394 ipds->off & (IP_MF|IP_OFFMASK));
395 break;
396
397 case IPPROTO_PIGP:
398 /*
399 * XXX - the current IANA protocol number assignments
400 * page lists 9 as "any private interior gateway
401 * (used by Cisco for their IGRP)" and 88 as
402 * "EIGRP" from Cisco.
403 *
404 * Recent BSD <netinet/in.h> headers define
405 * IP_PROTO_PIGP as 9 and IP_PROTO_IGRP as 88.
406 * We define IP_PROTO_PIGP as 9 and
407 * IP_PROTO_EIGRP as 88; those names better
408 * match was the current protocol number
409 * assignments say.
410 */
411 igrp_print(ndo, ipds->cp, ipds->len);
412 break;
413
414 case IPPROTO_EIGRP:
415 eigrp_print(ndo, ipds->cp, ipds->len);
416 break;
417
418 case IPPROTO_ND:
419 ND_PRINT((ndo, " nd %d", ipds->len));
420 break;
421
422 case IPPROTO_EGP:
423 egp_print(ndo, ipds->cp, ipds->len);
424 break;
425
426 case IPPROTO_OSPF:
427 ospf_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
428 break;
429
430 case IPPROTO_IGMP:
431 igmp_print(ndo, ipds->cp, ipds->len);
432 break;
433
434 case IPPROTO_IPV4:
435 /* DVMRP multicast tunnel (ip-in-ip encapsulation) */
436 ip_print(ndo, ipds->cp, ipds->len);
437 if (! ndo->ndo_vflag) {
438 ND_PRINT((ndo, " (ipip-proto-4)"));
439 return;
440 }
441 break;
442
443 case IPPROTO_IPV6:
444 /* ip6-in-ip encapsulation */
445 ip6_print(ndo, ipds->cp, ipds->len);
446 break;
447
448 case IPPROTO_RSVP:
449 rsvp_print(ndo, ipds->cp, ipds->len);
450 break;
451
452 case IPPROTO_GRE:
453 /* do it */
454 gre_print(ndo, ipds->cp, ipds->len);
455 break;
456
457 case IPPROTO_MOBILE:
458 mobile_print(ndo, ipds->cp, ipds->len);
459 break;
460
461 case IPPROTO_PIM:
462 pim_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
463 break;
464
465 case IPPROTO_VRRP:
466 if (ndo->ndo_packettype == PT_CARP) {
467 if (ndo->ndo_vflag)
468 ND_PRINT((ndo, "carp %s > %s: ",
469 ipaddr_string(ndo, &ipds->ip->ip_src),
470 ipaddr_string(ndo, &ipds->ip->ip_dst)));
471 carp_print(ndo, ipds->cp, ipds->len, ipds->ip->ip_ttl);
472 } else {
473 if (ndo->ndo_vflag)
474 ND_PRINT((ndo, "vrrp %s > %s: ",
475 ipaddr_string(ndo, &ipds->ip->ip_src),
476 ipaddr_string(ndo, &ipds->ip->ip_dst)));
477 vrrp_print(ndo, ipds->cp, ipds->len,
478 (const u_char *)ipds->ip, ipds->ip->ip_ttl);
479 }
480 break;
481
482 case IPPROTO_PGM:
483 pgm_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
484 break;
485
486 default:
487 if (ndo->ndo_nflag==0 && (proto = getprotobynumber(ipds->nh)) != NULL)
488 ND_PRINT((ndo, " %s", proto->p_name));
489 else
490 ND_PRINT((ndo, " ip-proto-%d", ipds->nh));
491 ND_PRINT((ndo, " %d", ipds->len));
492 break;
493 }
494 }
495
496 void
ip_print_inner(netdissect_options * ndo,const u_char * bp,u_int length,u_int nh,const u_char * bp2)497 ip_print_inner(netdissect_options *ndo,
498 const u_char *bp,
499 u_int length, u_int nh,
500 const u_char *bp2)
501 {
502 struct ip_print_demux_state ipd;
503
504 ipd.ip = (const struct ip *)bp2;
505 ipd.cp = bp;
506 ipd.len = length;
507 ipd.off = 0;
508 ipd.nh = nh;
509 ipd.advance = 0;
510
511 ip_print_demux(ndo, &ipd);
512 }
513
514
515 /*
516 * print an IP datagram.
517 */
518 void
ip_print(netdissect_options * ndo,const u_char * bp,u_int length)519 ip_print(netdissect_options *ndo,
520 const u_char *bp,
521 u_int length)
522 {
523 struct ip_print_demux_state ipd;
524 struct ip_print_demux_state *ipds=&ipd;
525 const u_char *ipend;
526 u_int hlen;
527 struct cksum_vec vec[1];
528 uint16_t sum, ip_sum;
529 struct protoent *proto;
530
531 ipds->ip = (const struct ip *)bp;
532 ND_TCHECK(ipds->ip->ip_vhl);
533 if (IP_V(ipds->ip) != 4) { /* print version and fail if != 4 */
534 if (IP_V(ipds->ip) == 6)
535 ND_PRINT((ndo, "IP6, wrong link-layer encapsulation "));
536 else
537 ND_PRINT((ndo, "IP%u ", IP_V(ipds->ip)));
538 return;
539 }
540 if (!ndo->ndo_eflag)
541 ND_PRINT((ndo, "IP "));
542
543 ND_TCHECK(*ipds->ip);
544 if (length < sizeof (struct ip)) {
545 ND_PRINT((ndo, "truncated-ip %u", length));
546 return;
547 }
548 hlen = IP_HL(ipds->ip) * 4;
549 if (hlen < sizeof (struct ip)) {
550 ND_PRINT((ndo, "bad-hlen %u", hlen));
551 return;
552 }
553
554 ipds->len = EXTRACT_16BITS(&ipds->ip->ip_len);
555 if (length < ipds->len)
556 ND_PRINT((ndo, "truncated-ip - %u bytes missing! ",
557 ipds->len - length));
558 if (ipds->len < hlen) {
559 #ifdef GUESS_TSO
560 if (ipds->len) {
561 ND_PRINT((ndo, "bad-len %u", ipds->len));
562 return;
563 }
564 else {
565 /* we guess that it is a TSO send */
566 ipds->len = length;
567 }
568 #else
569 ND_PRINT((ndo, "bad-len %u", ipds->len));
570 return;
571 #endif /* GUESS_TSO */
572 }
573
574 /*
575 * Cut off the snapshot length to the end of the IP payload.
576 */
577 ipend = bp + ipds->len;
578 if (ipend < ndo->ndo_snapend)
579 ndo->ndo_snapend = ipend;
580
581 ipds->len -= hlen;
582
583 ipds->off = EXTRACT_16BITS(&ipds->ip->ip_off);
584
585 if (ndo->ndo_vflag) {
586 ND_PRINT((ndo, "(tos 0x%x", (int)ipds->ip->ip_tos));
587 /* ECN bits */
588 switch (ipds->ip->ip_tos & 0x03) {
589
590 case 0:
591 break;
592
593 case 1:
594 ND_PRINT((ndo, ",ECT(1)"));
595 break;
596
597 case 2:
598 ND_PRINT((ndo, ",ECT(0)"));
599 break;
600
601 case 3:
602 ND_PRINT((ndo, ",CE"));
603 break;
604 }
605
606 if (ipds->ip->ip_ttl >= 1)
607 ND_PRINT((ndo, ", ttl %u", ipds->ip->ip_ttl));
608
609 /*
610 * for the firewall guys, print id, offset.
611 * On all but the last stick a "+" in the flags portion.
612 * For unfragmented datagrams, note the don't fragment flag.
613 */
614
615 ND_PRINT((ndo, ", id %u, offset %u, flags [%s], proto %s (%u)",
616 EXTRACT_16BITS(&ipds->ip->ip_id),
617 (ipds->off & 0x1fff) * 8,
618 bittok2str(ip_frag_values, "none", ipds->off&0xe000),
619 tok2str(ipproto_values,"unknown",ipds->ip->ip_p),
620 ipds->ip->ip_p));
621
622 ND_PRINT((ndo, ", length %u", EXTRACT_16BITS(&ipds->ip->ip_len)));
623
624 if ((hlen - sizeof(struct ip)) > 0) {
625 ND_PRINT((ndo, ", options ("));
626 ip_optprint(ndo, (const u_char *)(ipds->ip + 1), hlen - sizeof(struct ip));
627 ND_PRINT((ndo, ")"));
628 }
629
630 if (!ndo->ndo_Kflag && (const u_char *)ipds->ip + hlen <= ndo->ndo_snapend) {
631 vec[0].ptr = (const uint8_t *)(const void *)ipds->ip;
632 vec[0].len = hlen;
633 sum = in_cksum(vec, 1);
634 if (sum != 0) {
635 ip_sum = EXTRACT_16BITS(&ipds->ip->ip_sum);
636 ND_PRINT((ndo, ", bad cksum %x (->%x)!", ip_sum,
637 in_cksum_shouldbe(ip_sum, sum)));
638 }
639 }
640
641 ND_PRINT((ndo, ")\n "));
642 }
643
644 /*
645 * If this is fragment zero, hand it to the next higher
646 * level protocol.
647 */
648 if ((ipds->off & 0x1fff) == 0) {
649 ipds->cp = (const u_char *)ipds->ip + hlen;
650 ipds->nh = ipds->ip->ip_p;
651
652 if (ipds->nh != IPPROTO_TCP && ipds->nh != IPPROTO_UDP &&
653 ipds->nh != IPPROTO_SCTP && ipds->nh != IPPROTO_DCCP) {
654 ND_PRINT((ndo, "%s > %s: ",
655 ipaddr_string(ndo, &ipds->ip->ip_src),
656 ipaddr_string(ndo, &ipds->ip->ip_dst)));
657 }
658 ip_print_demux(ndo, ipds);
659 } else {
660 /*
661 * Ultra quiet now means that all this stuff should be
662 * suppressed.
663 */
664 if (ndo->ndo_qflag > 1)
665 return;
666
667 /*
668 * This isn't the first frag, so we're missing the
669 * next level protocol header. print the ip addr
670 * and the protocol.
671 */
672 ND_PRINT((ndo, "%s > %s:", ipaddr_string(ndo, &ipds->ip->ip_src),
673 ipaddr_string(ndo, &ipds->ip->ip_dst)));
674 if (!ndo->ndo_nflag && (proto = getprotobynumber(ipds->ip->ip_p)) != NULL)
675 ND_PRINT((ndo, " %s", proto->p_name));
676 else
677 ND_PRINT((ndo, " ip-proto-%d", ipds->ip->ip_p));
678 }
679 return;
680
681 trunc:
682 ND_PRINT((ndo, "%s", tstr));
683 return;
684 }
685
686 void
ipN_print(netdissect_options * ndo,register const u_char * bp,register u_int length)687 ipN_print(netdissect_options *ndo, register const u_char *bp, register u_int length)
688 {
689 if (length < 1) {
690 ND_PRINT((ndo, "truncated-ip %d", length));
691 return;
692 }
693
694 ND_TCHECK(*bp);
695 switch (*bp & 0xF0) {
696 case 0x40:
697 ip_print (ndo, bp, length);
698 break;
699 case 0x60:
700 ip6_print (ndo, bp, length);
701 break;
702 default:
703 ND_PRINT((ndo, "unknown ip %d", (*bp & 0xF0) >> 4));
704 break;
705 }
706 return;
707
708 trunc:
709 ND_PRINT((ndo, "%s", tstr));
710 return;
711 }
712
713 /*
714 * Local Variables:
715 * c-style: whitesmith
716 * c-basic-offset: 8
717 * End:
718 */
719
720
721