2 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994, 1995, 1996
3 * The Regents of the University of California. All rights reserved.
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
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.
24 #define NETDISSECT_REWORKED
29 #include <tcpdump-stdinc.h>
34 #include "interface.h"
35 #include "addrtoname.h"
36 #include "extract.h" /* must come after interface.h */
44 * Interface Control Message Protocol Definitions.
45 * Per RFC 792, September 1981.
49 * Structure of an icmp header.
52 uint8_t icmp_type; /* type of message, see below */
53 uint8_t icmp_code; /* type sub code */
54 uint16_t icmp_cksum; /* ones complement cksum of struct */
56 uint8_t ih_pptr; /* ICMP_PARAMPROB */
57 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
64 #define icmp_pptr icmp_hun.ih_pptr
65 #define icmp_gwaddr icmp_hun.ih_gwaddr
66 #define icmp_id icmp_hun.ih_idseq.icd_id
67 #define icmp_seq icmp_hun.ih_idseq.icd_seq
68 #define icmp_void icmp_hun.ih_void
77 /* options and then 64 bits of data */
82 #define icmp_otime icmp_dun.id_ts.its_otime
83 #define icmp_rtime icmp_dun.id_ts.its_rtime
84 #define icmp_ttime icmp_dun.id_ts.its_ttime
85 #define icmp_ip icmp_dun.id_ip.idi_ip
86 #define icmp_mask icmp_dun.id_mask
87 #define icmp_data icmp_dun.id_data
90 #define ICMP_MPLS_EXT_EXTRACT_VERSION(x) (((x)&0xf0)>>4)
91 #define ICMP_MPLS_EXT_VERSION 2
94 * Lower bounds on packet lengths for various types.
95 * For the error advice packets must first insure that the
96 * packet is large enought to contain the returned ip header.
97 * Only then can we do the check to see if 64 bits of packet
98 * data have been returned, since we need to check the returned
101 #define ICMP_MINLEN 8 /* abs minimum */
102 #define ICMP_EXTD_MINLEN (156 - sizeof (struct ip)) /* draft-bonica-internet-icmp-08 */
103 #define ICMP_TSLEN (8 + 3 * sizeof (uint32_t)) /* timestamp */
104 #define ICMP_MASKLEN 12 /* address mask */
105 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
106 #define ICMP_ADVLEN(p) (8 + (IP_HL(&(p)->icmp_ip) << 2) + 8)
107 /* N.B.: must separately check that ip_hl >= 5 */
110 * Definition of type and code field values.
112 #define ICMP_ECHOREPLY 0 /* echo reply */
113 #define ICMP_UNREACH 3 /* dest unreachable, codes: */
114 #define ICMP_UNREACH_NET 0 /* bad net */
115 #define ICMP_UNREACH_HOST 1 /* bad host */
116 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
117 #define ICMP_UNREACH_PORT 3 /* bad port */
118 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
119 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
120 #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
121 #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
122 #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
123 #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */
124 #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
125 #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
126 #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
127 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
128 #define ICMP_REDIRECT 5 /* shorter route, codes: */
129 #define ICMP_REDIRECT_NET 0 /* for network */
130 #define ICMP_REDIRECT_HOST 1 /* for host */
131 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
132 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
133 #define ICMP_ECHO 8 /* echo service */
134 #define ICMP_ROUTERADVERT 9 /* router advertisement */
135 #define ICMP_ROUTERSOLICIT 10 /* router solicitation */
136 #define ICMP_TIMXCEED 11 /* time exceeded, code: */
137 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
138 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
139 #define ICMP_PARAMPROB 12 /* ip header bad */
140 #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
141 #define ICMP_TSTAMP 13 /* timestamp request */
142 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */
143 #define ICMP_IREQ 15 /* information request */
144 #define ICMP_IREQREPLY 16 /* information reply */
145 #define ICMP_MASKREQ 17 /* address mask request */
146 #define ICMP_MASKREPLY 18 /* address mask reply */
148 #define ICMP_MAXTYPE 18
150 #define ICMP_INFOTYPE(type) \
151 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
152 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
153 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
154 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
155 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
156 #define ICMP_MPLS_EXT_TYPE(type) \
157 ((type) == ICMP_UNREACH || \
158 (type) == ICMP_TIMXCEED || \
159 (type) == ICMP_PARAMPROB)
161 #ifndef ICMP_UNREACH_NET_UNKNOWN
162 #define ICMP_UNREACH_NET_UNKNOWN 6 /* destination net unknown */
164 #ifndef ICMP_UNREACH_HOST_UNKNOWN
165 #define ICMP_UNREACH_HOST_UNKNOWN 7 /* destination host unknown */
167 #ifndef ICMP_UNREACH_ISOLATED
168 #define ICMP_UNREACH_ISOLATED 8 /* source host isolated */
170 #ifndef ICMP_UNREACH_NET_PROHIB
171 #define ICMP_UNREACH_NET_PROHIB 9 /* admin prohibited net */
173 #ifndef ICMP_UNREACH_HOST_PROHIB
174 #define ICMP_UNREACH_HOST_PROHIB 10 /* admin prohibited host */
176 #ifndef ICMP_UNREACH_TOSNET
177 #define ICMP_UNREACH_TOSNET 11 /* tos prohibited net */
179 #ifndef ICMP_UNREACH_TOSHOST
180 #define ICMP_UNREACH_TOSHOST 12 /* tos prohibited host */
184 #ifndef ICMP_UNREACH_FILTER_PROHIB
185 #define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohibited filter */
187 #ifndef ICMP_UNREACH_HOST_PRECEDENCE
188 #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host precedence violation */
190 #ifndef ICMP_UNREACH_PRECEDENCE_CUTOFF
191 #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* precedence cutoff */
194 /* Most of the icmp types */
195 static const struct tok icmp2str[] = {
196 { ICMP_ECHOREPLY, "echo reply" },
197 { ICMP_SOURCEQUENCH, "source quench" },
198 { ICMP_ECHO, "echo request" },
199 { ICMP_ROUTERSOLICIT, "router solicitation" },
200 { ICMP_TSTAMP, "time stamp request" },
201 { ICMP_TSTAMPREPLY, "time stamp reply" },
202 { ICMP_IREQ, "information request" },
203 { ICMP_IREQREPLY, "information reply" },
204 { ICMP_MASKREQ, "address mask request" },
208 /* Formats for most of the ICMP_UNREACH codes */
209 static const struct tok unreach2str[] = {
210 { ICMP_UNREACH_NET, "net %s unreachable" },
211 { ICMP_UNREACH_HOST, "host %s unreachable" },
212 { ICMP_UNREACH_SRCFAIL,
213 "%s unreachable - source route failed" },
214 { ICMP_UNREACH_NET_UNKNOWN, "net %s unreachable - unknown" },
215 { ICMP_UNREACH_HOST_UNKNOWN, "host %s unreachable - unknown" },
216 { ICMP_UNREACH_ISOLATED,
217 "%s unreachable - source host isolated" },
218 { ICMP_UNREACH_NET_PROHIB,
219 "net %s unreachable - admin prohibited" },
220 { ICMP_UNREACH_HOST_PROHIB,
221 "host %s unreachable - admin prohibited" },
222 { ICMP_UNREACH_TOSNET,
223 "net %s unreachable - tos prohibited" },
224 { ICMP_UNREACH_TOSHOST,
225 "host %s unreachable - tos prohibited" },
226 { ICMP_UNREACH_FILTER_PROHIB,
227 "host %s unreachable - admin prohibited filter" },
228 { ICMP_UNREACH_HOST_PRECEDENCE,
229 "host %s unreachable - host precedence violation" },
230 { ICMP_UNREACH_PRECEDENCE_CUTOFF,
231 "host %s unreachable - precedence cutoff" },
235 /* Formats for the ICMP_REDIRECT codes */
236 static const struct tok type2str[] = {
237 { ICMP_REDIRECT_NET, "redirect %s to net %s" },
238 { ICMP_REDIRECT_HOST, "redirect %s to host %s" },
239 { ICMP_REDIRECT_TOSNET, "redirect-tos %s to net %s" },
240 { ICMP_REDIRECT_TOSHOST, "redirect-tos %s to host %s" },
245 struct mtu_discovery {
251 struct ih_rdiscovery {
254 uint16_t ird_lifetime;
257 struct id_rdiscovery {
263 * draft-bonica-internet-icmp-08
265 * The Destination Unreachable, Time Exceeded
266 * and Parameter Problem messages are slighly changed as per
267 * the above draft. A new Length field gets added to give
268 * the caller an idea about the length of the piggypacked
269 * IP packet before the MPLS extension header starts.
271 * The Length field represents length of the padded "original datagram"
272 * field measured in 32-bit words.
275 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
276 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
277 * | Type | Code | Checksum |
278 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
279 * | unused | Length | unused |
280 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
281 * | Internet Header + leading octets of original datagram |
285 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
291 uint8_t icmp_checksum[2];
292 uint8_t icmp_reserved;
294 uint8_t icmp_reserved2[2];
295 uint8_t icmp_ext_legacy_header[128]; /* extension header starts 128 bytes after ICMP header */
296 uint8_t icmp_ext_version_res[2];
297 uint8_t icmp_ext_checksum[2];
298 uint8_t icmp_ext_data[1];
301 struct icmp_mpls_ext_object_header_t {
307 static const struct tok icmp_mpls_ext_obj_values[] = {
308 { 1, "MPLS Stack Entry" },
309 { 2, "Extended Payload" },
314 const char *icmp_tstamp_print(u_int);
316 /* print the milliseconds since midnight UTC */
318 icmp_tstamp_print(u_int tstamp) {
319 u_int msec,sec,min,hrs;
323 msec = tstamp % 1000;
325 min = sec / 60; sec -= min * 60;
326 hrs = min / 60; min -= hrs * 60;
327 snprintf(buf, sizeof(buf), "%02u:%02u:%02u.%03u",hrs,min,sec,msec);
332 icmp_print(netdissect_options *ndo, const u_char *bp, u_int plen, const u_char *bp2,
336 const struct icmp *dp;
337 const struct icmp_ext_t *ext_dp;
339 const char *str, *fmt;
340 const struct ip *oip;
341 const struct udphdr *ouh;
342 const uint8_t *obj_tptr;
344 const u_char *snapend_save;
345 const struct icmp_mpls_ext_object_header_t *icmp_mpls_ext_object_header;
346 u_int hlen, dport, mtu, obj_tlen, obj_class_num, obj_ctype;
347 char buf[MAXHOSTNAMELEN + 100];
348 struct cksum_vec vec[1];
350 dp = (struct icmp *)bp;
351 ext_dp = (struct icmp_ext_t *)bp;
352 ip = (struct ip *)bp2;
355 ND_TCHECK(dp->icmp_code);
356 switch (dp->icmp_type) {
360 ND_TCHECK(dp->icmp_seq);
361 (void)snprintf(buf, sizeof(buf), "echo %s, id %u, seq %u",
362 dp->icmp_type == ICMP_ECHO ?
364 EXTRACT_16BITS(&dp->icmp_id),
365 EXTRACT_16BITS(&dp->icmp_seq));
369 ND_TCHECK(dp->icmp_ip.ip_dst);
370 switch (dp->icmp_code) {
372 case ICMP_UNREACH_PROTOCOL:
373 ND_TCHECK(dp->icmp_ip.ip_p);
374 (void)snprintf(buf, sizeof(buf),
375 "%s protocol %d unreachable",
376 ipaddr_string(ndo, &dp->icmp_ip.ip_dst),
380 case ICMP_UNREACH_PORT:
381 ND_TCHECK(dp->icmp_ip.ip_p);
383 hlen = IP_HL(oip) * 4;
384 ouh = (struct udphdr *)(((u_char *)oip) + hlen);
385 ND_TCHECK(ouh->uh_dport);
386 dport = EXTRACT_16BITS(&ouh->uh_dport);
390 (void)snprintf(buf, sizeof(buf),
391 "%s tcp port %s unreachable",
392 ipaddr_string(ndo, &oip->ip_dst),
393 tcpport_string(dport));
397 (void)snprintf(buf, sizeof(buf),
398 "%s udp port %s unreachable",
399 ipaddr_string(ndo, &oip->ip_dst),
400 udpport_string(dport));
404 (void)snprintf(buf, sizeof(buf),
405 "%s protocol %d port %d unreachable",
406 ipaddr_string(ndo, &oip->ip_dst),
412 case ICMP_UNREACH_NEEDFRAG:
414 register const struct mtu_discovery *mp;
415 mp = (struct mtu_discovery *)(u_char *)&dp->icmp_void;
416 mtu = EXTRACT_16BITS(&mp->nexthopmtu);
418 (void)snprintf(buf, sizeof(buf),
419 "%s unreachable - need to frag (mtu %d)",
420 ipaddr_string(ndo, &dp->icmp_ip.ip_dst), mtu);
422 (void)snprintf(buf, sizeof(buf),
423 "%s unreachable - need to frag",
424 ipaddr_string(ndo, &dp->icmp_ip.ip_dst));
430 fmt = tok2str(unreach2str, "#%d %%s unreachable",
432 (void)snprintf(buf, sizeof(buf), fmt,
433 ipaddr_string(ndo, &dp->icmp_ip.ip_dst));
439 ND_TCHECK(dp->icmp_ip.ip_dst);
440 fmt = tok2str(type2str, "redirect-#%d %%s to net %%s",
442 (void)snprintf(buf, sizeof(buf), fmt,
443 ipaddr_string(ndo, &dp->icmp_ip.ip_dst),
444 ipaddr_string(ndo, &dp->icmp_gwaddr));
447 case ICMP_ROUTERADVERT:
449 register const struct ih_rdiscovery *ihp;
450 register const struct id_rdiscovery *idp;
451 u_int lifetime, num, size;
453 (void)snprintf(buf, sizeof(buf), "router advertisement");
454 cp = buf + strlen(buf);
456 ihp = (struct ih_rdiscovery *)&dp->icmp_void;
458 (void)strncpy(cp, " lifetime ", sizeof(buf) - (cp - buf));
459 cp = buf + strlen(buf);
460 lifetime = EXTRACT_16BITS(&ihp->ird_lifetime);
462 (void)snprintf(cp, sizeof(buf) - (cp - buf), "%u",
464 } else if (lifetime < 60 * 60) {
465 (void)snprintf(cp, sizeof(buf) - (cp - buf), "%u:%02u",
466 lifetime / 60, lifetime % 60);
468 (void)snprintf(cp, sizeof(buf) - (cp - buf),
471 (lifetime % 3600) / 60,
474 cp = buf + strlen(buf);
476 num = ihp->ird_addrnum;
477 (void)snprintf(cp, sizeof(buf) - (cp - buf), " %d:", num);
478 cp = buf + strlen(buf);
480 size = ihp->ird_addrsiz;
482 (void)snprintf(cp, sizeof(buf) - (cp - buf),
486 idp = (struct id_rdiscovery *)&dp->icmp_data;
489 (void)snprintf(cp, sizeof(buf) - (cp - buf), " {%s %u}",
490 ipaddr_string(ndo, &idp->ird_addr),
491 EXTRACT_32BITS(&idp->ird_pref));
492 cp = buf + strlen(buf);
499 ND_TCHECK(dp->icmp_ip.ip_dst);
500 switch (dp->icmp_code) {
502 case ICMP_TIMXCEED_INTRANS:
503 str = "time exceeded in-transit";
506 case ICMP_TIMXCEED_REASS:
507 str = "ip reassembly time exceeded";
511 (void)snprintf(buf, sizeof(buf), "time exceeded-#%d",
519 (void)snprintf(buf, sizeof(buf),
520 "parameter problem - code %d", dp->icmp_code);
522 ND_TCHECK(dp->icmp_pptr);
523 (void)snprintf(buf, sizeof(buf),
524 "parameter problem - octet %d", dp->icmp_pptr);
529 ND_TCHECK(dp->icmp_mask);
530 (void)snprintf(buf, sizeof(buf), "address mask is 0x%08x",
531 EXTRACT_32BITS(&dp->icmp_mask));
535 ND_TCHECK(dp->icmp_seq);
536 (void)snprintf(buf, sizeof(buf),
537 "time stamp query id %u seq %u",
538 EXTRACT_16BITS(&dp->icmp_id),
539 EXTRACT_16BITS(&dp->icmp_seq));
542 case ICMP_TSTAMPREPLY:
543 ND_TCHECK(dp->icmp_ttime);
544 (void)snprintf(buf, sizeof(buf),
545 "time stamp reply id %u seq %u: org %s",
546 EXTRACT_16BITS(&dp->icmp_id),
547 EXTRACT_16BITS(&dp->icmp_seq),
548 icmp_tstamp_print(EXTRACT_32BITS(&dp->icmp_otime)));
550 (void)snprintf(buf+strlen(buf),sizeof(buf)-strlen(buf),", recv %s",
551 icmp_tstamp_print(EXTRACT_32BITS(&dp->icmp_rtime)));
552 (void)snprintf(buf+strlen(buf),sizeof(buf)-strlen(buf),", xmit %s",
553 icmp_tstamp_print(EXTRACT_32BITS(&dp->icmp_ttime)));
557 str = tok2str(icmp2str, "type-#%d", dp->icmp_type);
560 ND_PRINT((ndo, "ICMP %s, length %u", str, plen));
561 if (ndo->ndo_vflag && !fragmented) { /* don't attempt checksumming if this is a frag */
562 uint16_t sum, icmp_sum;
563 struct cksum_vec vec[1];
564 if (ND_TTEST2(*bp, plen)) {
565 vec[0].ptr = (const uint8_t *)(void *)dp;
567 sum = in_cksum(vec, 1);
569 icmp_sum = EXTRACT_16BITS(&dp->icmp_cksum);
570 ND_PRINT((ndo, " (wrong icmp cksum %x (->%x)!)",
572 in_cksum_shouldbe(icmp_sum, sum)));
578 * print the remnants of the IP packet.
579 * save the snaplength as this may get overidden in the IP printer.
581 if (ndo->ndo_vflag >= 1 && !ICMP_INFOTYPE(dp->icmp_type)) {
583 ND_PRINT((ndo, "\n\t"));
584 ip = (struct ip *)bp;
585 ndo->ndo_snaplen = ndo->ndo_snapend - bp;
586 snapend_save = ndo->ndo_snapend;
587 ip_print(ndo, bp, EXTRACT_16BITS(&ip->ip_len));
588 ndo->ndo_snapend = snapend_save;
592 * Attempt to decode the MPLS extensions only for some ICMP types.
594 if (ndo->ndo_vflag >= 1 && plen > ICMP_EXTD_MINLEN && ICMP_MPLS_EXT_TYPE(dp->icmp_type)) {
599 * Check first if the mpls extension header shows a non-zero length.
600 * If the length field is not set then silently verify the checksum
601 * to check if an extension header is present. This is expedient,
602 * however not all implementations set the length field proper.
604 if (!ext_dp->icmp_length) {
605 vec[0].ptr = (const uint8_t *)(void *)&ext_dp->icmp_ext_version_res;
606 vec[0].len = plen - ICMP_EXTD_MINLEN;
607 if (in_cksum(vec, 1)) {
612 ND_PRINT((ndo, "\n\tMPLS extension v%u",
613 ICMP_MPLS_EXT_EXTRACT_VERSION(*(ext_dp->icmp_ext_version_res))));
616 * Sanity checking of the header.
618 if (ICMP_MPLS_EXT_EXTRACT_VERSION(*(ext_dp->icmp_ext_version_res)) !=
619 ICMP_MPLS_EXT_VERSION) {
620 ND_PRINT((ndo, " packet not supported"));
624 hlen = plen - ICMP_EXTD_MINLEN;
625 vec[0].ptr = (const uint8_t *)(void *)&ext_dp->icmp_ext_version_res;
627 ND_PRINT((ndo, ", checksum 0x%04x (%scorrect), length %u",
628 EXTRACT_16BITS(ext_dp->icmp_ext_checksum),
629 in_cksum(vec, 1) ? "in" : "",
632 hlen -= 4; /* subtract common header size */
633 obj_tptr = (uint8_t *)ext_dp->icmp_ext_data;
635 while (hlen > sizeof(struct icmp_mpls_ext_object_header_t)) {
637 icmp_mpls_ext_object_header = (struct icmp_mpls_ext_object_header_t *)obj_tptr;
638 ND_TCHECK(*icmp_mpls_ext_object_header);
639 obj_tlen = EXTRACT_16BITS(icmp_mpls_ext_object_header->length);
640 obj_class_num = icmp_mpls_ext_object_header->class_num;
641 obj_ctype = icmp_mpls_ext_object_header->ctype;
642 obj_tptr += sizeof(struct icmp_mpls_ext_object_header_t);
644 ND_PRINT((ndo, "\n\t %s Object (%u), Class-Type: %u, length %u",
645 tok2str(icmp_mpls_ext_obj_values,"unknown",obj_class_num),
650 hlen-=sizeof(struct icmp_mpls_ext_object_header_t); /* length field includes tlv header */
652 /* infinite loop protection */
653 if ((obj_class_num == 0) ||
654 (obj_tlen < sizeof(struct icmp_mpls_ext_object_header_t))) {
657 obj_tlen-=sizeof(struct icmp_mpls_ext_object_header_t);
659 switch (obj_class_num) {
663 ND_TCHECK2(*obj_tptr, 4);
664 raw_label = EXTRACT_32BITS(obj_tptr);
665 ND_PRINT((ndo, "\n\t label %u, exp %u", MPLS_LABEL(raw_label), MPLS_EXP(raw_label)));
666 if (MPLS_STACK(raw_label))
667 ND_PRINT((ndo, ", [S]"));
668 ND_PRINT((ndo, ", ttl %u", MPLS_TTL(raw_label)));
671 print_unknown_data(ndo, obj_tptr, "\n\t ", obj_tlen);
676 * FIXME those are the defined objects that lack a decoder
677 * you are welcome to contribute code ;-)
681 print_unknown_data(ndo, obj_tptr, "\n\t ", obj_tlen);
687 obj_tptr += obj_tlen;
693 ND_PRINT((ndo, "[|icmp]"));
697 * c-style: whitesmith