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1 /*
2  * Copyright (c) 1990, 1991, 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: BOOTP and IPv4 DHCP 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 static const char tstr[] = " [|bootp]";
37 
38 /*
39  * Bootstrap Protocol (BOOTP).  RFC951 and RFC1048.
40  *
41  * This file specifies the "implementation-independent" BOOTP protocol
42  * information which is common to both client and server.
43  *
44  * Copyright 1988 by Carnegie Mellon.
45  *
46  * Permission to use, copy, modify, and distribute this program for any
47  * purpose and without fee is hereby granted, provided that this copyright
48  * and permission notice appear on all copies and supporting documentation,
49  * the name of Carnegie Mellon not be used in advertising or publicity
50  * pertaining to distribution of the program without specific prior
51  * permission, and notice be given in supporting documentation that copying
52  * and distribution is by permission of Carnegie Mellon and Stanford
53  * University.  Carnegie Mellon makes no representations about the
54  * suitability of this software for any purpose.  It is provided "as is"
55  * without express or implied warranty.
56  */
57 
58 struct bootp {
59 	uint8_t		bp_op;		/* packet opcode type */
60 	uint8_t		bp_htype;	/* hardware addr type */
61 	uint8_t		bp_hlen;	/* hardware addr length */
62 	uint8_t		bp_hops;	/* gateway hops */
63 	uint32_t	bp_xid;		/* transaction ID */
64 	uint16_t	bp_secs;	/* seconds since boot began */
65 	uint16_t	bp_flags;	/* flags - see bootp_flag_values[]
66 					   in print-bootp.c */
67 	struct in_addr	bp_ciaddr;	/* client IP address */
68 	struct in_addr	bp_yiaddr;	/* 'your' IP address */
69 	struct in_addr	bp_siaddr;	/* server IP address */
70 	struct in_addr	bp_giaddr;	/* gateway IP address */
71 	uint8_t		bp_chaddr[16];	/* client hardware address */
72 	uint8_t		bp_sname[64];	/* server host name */
73 	uint8_t		bp_file[128];	/* boot file name */
74 	uint8_t		bp_vend[64];	/* vendor-specific area */
75 } UNALIGNED;
76 
77 #define BOOTPREPLY	2
78 #define BOOTPREQUEST	1
79 
80 /*
81  * Vendor magic cookie (v_magic) for CMU
82  */
83 #define VM_CMU		"CMU"
84 
85 /*
86  * Vendor magic cookie (v_magic) for RFC1048
87  */
88 #define VM_RFC1048	{ 99, 130, 83, 99 }
89 
90 /*
91  * RFC1048 tag values used to specify what information is being supplied in
92  * the vendor field of the packet.
93  */
94 
95 #define TAG_PAD			((uint8_t)   0)
96 #define TAG_SUBNET_MASK		((uint8_t)   1)
97 #define TAG_TIME_OFFSET		((uint8_t)   2)
98 #define TAG_GATEWAY		((uint8_t)   3)
99 #define TAG_TIME_SERVER		((uint8_t)   4)
100 #define TAG_NAME_SERVER		((uint8_t)   5)
101 #define TAG_DOMAIN_SERVER	((uint8_t)   6)
102 #define TAG_LOG_SERVER		((uint8_t)   7)
103 #define TAG_COOKIE_SERVER	((uint8_t)   8)
104 #define TAG_LPR_SERVER		((uint8_t)   9)
105 #define TAG_IMPRESS_SERVER	((uint8_t)  10)
106 #define TAG_RLP_SERVER		((uint8_t)  11)
107 #define TAG_HOSTNAME		((uint8_t)  12)
108 #define TAG_BOOTSIZE		((uint8_t)  13)
109 #define TAG_END			((uint8_t) 255)
110 /* RFC1497 tags */
111 #define	TAG_DUMPPATH		((uint8_t)  14)
112 #define	TAG_DOMAINNAME		((uint8_t)  15)
113 #define	TAG_SWAP_SERVER		((uint8_t)  16)
114 #define	TAG_ROOTPATH		((uint8_t)  17)
115 #define	TAG_EXTPATH		((uint8_t)  18)
116 /* RFC2132 */
117 #define	TAG_IP_FORWARD		((uint8_t)  19)
118 #define	TAG_NL_SRCRT		((uint8_t)  20)
119 #define	TAG_PFILTERS		((uint8_t)  21)
120 #define	TAG_REASS_SIZE		((uint8_t)  22)
121 #define	TAG_DEF_TTL		((uint8_t)  23)
122 #define	TAG_MTU_TIMEOUT		((uint8_t)  24)
123 #define	TAG_MTU_TABLE		((uint8_t)  25)
124 #define	TAG_INT_MTU		((uint8_t)  26)
125 #define	TAG_LOCAL_SUBNETS	((uint8_t)  27)
126 #define	TAG_BROAD_ADDR		((uint8_t)  28)
127 #define	TAG_DO_MASK_DISC	((uint8_t)  29)
128 #define	TAG_SUPPLY_MASK		((uint8_t)  30)
129 #define	TAG_DO_RDISC		((uint8_t)  31)
130 #define	TAG_RTR_SOL_ADDR	((uint8_t)  32)
131 #define	TAG_STATIC_ROUTE	((uint8_t)  33)
132 #define	TAG_USE_TRAILERS	((uint8_t)  34)
133 #define	TAG_ARP_TIMEOUT		((uint8_t)  35)
134 #define	TAG_ETH_ENCAP		((uint8_t)  36)
135 #define	TAG_TCP_TTL		((uint8_t)  37)
136 #define	TAG_TCP_KEEPALIVE	((uint8_t)  38)
137 #define	TAG_KEEPALIVE_GO	((uint8_t)  39)
138 #define	TAG_NIS_DOMAIN		((uint8_t)  40)
139 #define	TAG_NIS_SERVERS		((uint8_t)  41)
140 #define	TAG_NTP_SERVERS		((uint8_t)  42)
141 #define	TAG_VENDOR_OPTS		((uint8_t)  43)
142 #define	TAG_NETBIOS_NS		((uint8_t)  44)
143 #define	TAG_NETBIOS_DDS		((uint8_t)  45)
144 #define	TAG_NETBIOS_NODE	((uint8_t)  46)
145 #define	TAG_NETBIOS_SCOPE	((uint8_t)  47)
146 #define	TAG_XWIN_FS		((uint8_t)  48)
147 #define	TAG_XWIN_DM		((uint8_t)  49)
148 #define	TAG_NIS_P_DOMAIN	((uint8_t)  64)
149 #define	TAG_NIS_P_SERVERS	((uint8_t)  65)
150 #define	TAG_MOBILE_HOME		((uint8_t)  68)
151 #define	TAG_SMPT_SERVER		((uint8_t)  69)
152 #define	TAG_POP3_SERVER		((uint8_t)  70)
153 #define	TAG_NNTP_SERVER		((uint8_t)  71)
154 #define	TAG_WWW_SERVER		((uint8_t)  72)
155 #define	TAG_FINGER_SERVER	((uint8_t)  73)
156 #define	TAG_IRC_SERVER		((uint8_t)  74)
157 #define	TAG_STREETTALK_SRVR	((uint8_t)  75)
158 #define	TAG_STREETTALK_STDA	((uint8_t)  76)
159 /* DHCP options */
160 #define	TAG_REQUESTED_IP	((uint8_t)  50)
161 #define	TAG_IP_LEASE		((uint8_t)  51)
162 #define	TAG_OPT_OVERLOAD	((uint8_t)  52)
163 #define	TAG_TFTP_SERVER		((uint8_t)  66)
164 #define	TAG_BOOTFILENAME	((uint8_t)  67)
165 #define	TAG_DHCP_MESSAGE	((uint8_t)  53)
166 #define	TAG_SERVER_ID		((uint8_t)  54)
167 #define	TAG_PARM_REQUEST	((uint8_t)  55)
168 #define	TAG_MESSAGE		((uint8_t)  56)
169 #define	TAG_MAX_MSG_SIZE	((uint8_t)  57)
170 #define	TAG_RENEWAL_TIME	((uint8_t)  58)
171 #define	TAG_REBIND_TIME		((uint8_t)  59)
172 #define	TAG_VENDOR_CLASS	((uint8_t)  60)
173 #define	TAG_CLIENT_ID		((uint8_t)  61)
174 /* RFC 2241 */
175 #define	TAG_NDS_SERVERS		((uint8_t)  85)
176 #define	TAG_NDS_TREE_NAME	((uint8_t)  86)
177 #define	TAG_NDS_CONTEXT		((uint8_t)  87)
178 /* RFC 2242 */
179 #define	TAG_NDS_IPDOMAIN	((uint8_t)  62)
180 #define	TAG_NDS_IPINFO		((uint8_t)  63)
181 /* RFC 2485 */
182 #define	TAG_OPEN_GROUP_UAP	((uint8_t)  98)
183 /* RFC 2563 */
184 #define	TAG_DISABLE_AUTOCONF	((uint8_t) 116)
185 /* RFC 2610 */
186 #define	TAG_SLP_DA		((uint8_t)  78)
187 #define	TAG_SLP_SCOPE		((uint8_t)  79)
188 /* RFC 2937 */
189 #define	TAG_NS_SEARCH		((uint8_t) 117)
190 /* RFC 3004 - The User Class Option for DHCP */
191 #define	TAG_USER_CLASS		((uint8_t)  77)
192 /* RFC 3011 */
193 #define	TAG_IP4_SUBNET_SELECT	((uint8_t) 118)
194 /* RFC 3442 */
195 #define TAG_CLASSLESS_STATIC_RT	((uint8_t) 121)
196 #define TAG_CLASSLESS_STA_RT_MS	((uint8_t) 249)
197 /* RFC 5859 - TFTP Server Address Option for DHCPv4 */
198 #define	TAG_TFTP_SERVER_ADDRESS	((uint8_t) 150)
199 /* ftp://ftp.isi.edu/.../assignments/bootp-dhcp-extensions */
200 #define	TAG_SLP_NAMING_AUTH	((uint8_t)  80)
201 #define	TAG_CLIENT_FQDN		((uint8_t)  81)
202 #define	TAG_AGENT_CIRCUIT	((uint8_t)  82)
203 #define	TAG_AGENT_REMOTE	((uint8_t)  83)
204 #define	TAG_AGENT_MASK		((uint8_t)  84)
205 #define	TAG_TZ_STRING		((uint8_t)  88)
206 #define	TAG_FQDN_OPTION		((uint8_t)  89)
207 #define	TAG_AUTH		((uint8_t)  90)
208 #define	TAG_VINES_SERVERS	((uint8_t)  91)
209 #define	TAG_SERVER_RANK		((uint8_t)  92)
210 #define	TAG_CLIENT_ARCH		((uint8_t)  93)
211 #define	TAG_CLIENT_NDI		((uint8_t)  94)
212 #define	TAG_CLIENT_GUID		((uint8_t)  97)
213 #define	TAG_LDAP_URL		((uint8_t)  95)
214 #define	TAG_6OVER4		((uint8_t)  96)
215 /* RFC 4833, TZ codes */
216 #define	TAG_TZ_PCODE    	((uint8_t) 100)
217 #define	TAG_TZ_TCODE    	((uint8_t) 101)
218 #define	TAG_IPX_COMPAT		((uint8_t) 110)
219 #define	TAG_NETINFO_PARENT	((uint8_t) 112)
220 #define	TAG_NETINFO_PARENT_TAG	((uint8_t) 113)
221 #define	TAG_URL			((uint8_t) 114)
222 #define	TAG_FAILOVER		((uint8_t) 115)
223 #define	TAG_EXTENDED_REQUEST	((uint8_t) 126)
224 #define	TAG_EXTENDED_OPTION	((uint8_t) 127)
225 #define TAG_MUDURL              ((uint8_t) 161)
226 
227 /* DHCP Message types (values for TAG_DHCP_MESSAGE option) */
228 #define DHCPDISCOVER	1
229 #define DHCPOFFER	2
230 #define DHCPREQUEST	3
231 #define DHCPDECLINE	4
232 #define DHCPACK		5
233 #define DHCPNAK		6
234 #define DHCPRELEASE	7
235 #define DHCPINFORM	8
236 
237 /*
238  * "vendor" data permitted for CMU bootp clients.
239  */
240 
241 struct cmu_vend {
242 	uint8_t		v_magic[4];	/* magic number */
243 	uint32_t	v_flags;	/* flags/opcodes, etc. */
244 	struct in_addr	v_smask;	/* Subnet mask */
245 	struct in_addr	v_dgate;	/* Default gateway */
246 	struct in_addr	v_dns1, v_dns2; /* Domain name servers */
247 	struct in_addr	v_ins1, v_ins2; /* IEN-116 name servers */
248 	struct in_addr	v_ts1, v_ts2;	/* Time servers */
249 	uint8_t		v_unused[24];	/* currently unused */
250 } UNALIGNED;
251 
252 
253 /* v_flags values */
254 #define VF_SMASK	1	/* Subnet mask field contains valid data */
255 
256 /* RFC 4702 DHCP Client FQDN Option */
257 
258 #define CLIENT_FQDN_FLAGS_S	0x01
259 #define CLIENT_FQDN_FLAGS_O	0x02
260 #define CLIENT_FQDN_FLAGS_E	0x04
261 #define CLIENT_FQDN_FLAGS_N	0x08
262 /* end of original bootp.h */
263 
264 static void rfc1048_print(netdissect_options *, const u_char *);
265 static void cmu_print(netdissect_options *, const u_char *);
266 static char *client_fqdn_flags(u_int flags);
267 
268 static const struct tok bootp_flag_values[] = {
269 	{ 0x8000,	"Broadcast" },
270 	{ 0, NULL}
271 };
272 
273 static const struct tok bootp_op_values[] = {
274 	{ BOOTPREQUEST,	"Request" },
275 	{ BOOTPREPLY,	"Reply" },
276 	{ 0, NULL}
277 };
278 
279 /*
280  * Print bootp requests
281  */
282 void
bootp_print(netdissect_options * ndo,register const u_char * cp,u_int length)283 bootp_print(netdissect_options *ndo,
284 	    register const u_char *cp, u_int length)
285 {
286 	register const struct bootp *bp;
287 	static const u_char vm_cmu[4] = VM_CMU;
288 	static const u_char vm_rfc1048[4] = VM_RFC1048;
289 
290 	bp = (const struct bootp *)cp;
291 	ND_TCHECK(bp->bp_op);
292 
293 	ND_PRINT((ndo, "BOOTP/DHCP, %s",
294 		  tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op)));
295 
296 	ND_TCHECK(bp->bp_hlen);
297 	if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
298 		ND_TCHECK2(bp->bp_chaddr[0], 6);
299 		ND_PRINT((ndo, " from %s", etheraddr_string(ndo, bp->bp_chaddr)));
300 	}
301 
302 	ND_PRINT((ndo, ", length %u", length));
303 
304 	if (!ndo->ndo_vflag)
305 		return;
306 
307 	ND_TCHECK(bp->bp_secs);
308 
309 	/* The usual hardware address type is 1 (10Mb Ethernet) */
310 	if (bp->bp_htype != 1)
311 		ND_PRINT((ndo, ", htype %d", bp->bp_htype));
312 
313 	/* The usual length for 10Mb Ethernet address is 6 bytes */
314 	if (bp->bp_htype != 1 || bp->bp_hlen != 6)
315 		ND_PRINT((ndo, ", hlen %d", bp->bp_hlen));
316 
317 	/* Only print interesting fields */
318 	if (bp->bp_hops)
319 		ND_PRINT((ndo, ", hops %d", bp->bp_hops));
320 	if (EXTRACT_32BITS(&bp->bp_xid))
321 		ND_PRINT((ndo, ", xid 0x%x", EXTRACT_32BITS(&bp->bp_xid)));
322 	if (EXTRACT_16BITS(&bp->bp_secs))
323 		ND_PRINT((ndo, ", secs %d", EXTRACT_16BITS(&bp->bp_secs)));
324 
325 	ND_PRINT((ndo, ", Flags [%s]",
326 		  bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags))));
327 	if (ndo->ndo_vflag > 1)
328 		ND_PRINT((ndo, " (0x%04x)", EXTRACT_16BITS(&bp->bp_flags)));
329 
330 	/* Client's ip address */
331 	ND_TCHECK(bp->bp_ciaddr);
332 	if (EXTRACT_32BITS(&bp->bp_ciaddr.s_addr))
333 		ND_PRINT((ndo, "\n\t  Client-IP %s", ipaddr_string(ndo, &bp->bp_ciaddr)));
334 
335 	/* 'your' ip address (bootp client) */
336 	ND_TCHECK(bp->bp_yiaddr);
337 	if (EXTRACT_32BITS(&bp->bp_yiaddr.s_addr))
338 		ND_PRINT((ndo, "\n\t  Your-IP %s", ipaddr_string(ndo, &bp->bp_yiaddr)));
339 
340 	/* Server's ip address */
341 	ND_TCHECK(bp->bp_siaddr);
342 	if (EXTRACT_32BITS(&bp->bp_siaddr.s_addr))
343 		ND_PRINT((ndo, "\n\t  Server-IP %s", ipaddr_string(ndo, &bp->bp_siaddr)));
344 
345 	/* Gateway's ip address */
346 	ND_TCHECK(bp->bp_giaddr);
347 	if (EXTRACT_32BITS(&bp->bp_giaddr.s_addr))
348 		ND_PRINT((ndo, "\n\t  Gateway-IP %s", ipaddr_string(ndo, &bp->bp_giaddr)));
349 
350 	/* Client's Ethernet address */
351 	if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
352 		ND_TCHECK2(bp->bp_chaddr[0], 6);
353 		ND_PRINT((ndo, "\n\t  Client-Ethernet-Address %s", etheraddr_string(ndo, bp->bp_chaddr)));
354 	}
355 
356 	ND_TCHECK2(bp->bp_sname[0], 1);		/* check first char only */
357 	if (*bp->bp_sname) {
358 		ND_PRINT((ndo, "\n\t  sname \""));
359 		if (fn_printztn(ndo, bp->bp_sname, (u_int)sizeof bp->bp_sname,
360 		    ndo->ndo_snapend)) {
361 			ND_PRINT((ndo, "\""));
362 			ND_PRINT((ndo, "%s", tstr + 1));
363 			return;
364 		}
365 		ND_PRINT((ndo, "\""));
366 	}
367 	ND_TCHECK2(bp->bp_file[0], 1);		/* check first char only */
368 	if (*bp->bp_file) {
369 		ND_PRINT((ndo, "\n\t  file \""));
370 		if (fn_printztn(ndo, bp->bp_file, (u_int)sizeof bp->bp_file,
371 		    ndo->ndo_snapend)) {
372 			ND_PRINT((ndo, "\""));
373 			ND_PRINT((ndo, "%s", tstr + 1));
374 			return;
375 		}
376 		ND_PRINT((ndo, "\""));
377 	}
378 
379 	/* Decode the vendor buffer */
380 	ND_TCHECK(bp->bp_vend[0]);
381 	if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
382 		    sizeof(uint32_t)) == 0)
383 		rfc1048_print(ndo, bp->bp_vend);
384 	else if (memcmp((const char *)bp->bp_vend, vm_cmu,
385 			sizeof(uint32_t)) == 0)
386 		cmu_print(ndo, bp->bp_vend);
387 	else {
388 		uint32_t ul;
389 
390 		ul = EXTRACT_32BITS(&bp->bp_vend);
391 		if (ul != 0)
392 			ND_PRINT((ndo, "\n\t  Vendor-#0x%x", ul));
393 	}
394 
395 	return;
396 trunc:
397 	ND_PRINT((ndo, "%s", tstr));
398 }
399 
400 /*
401  * The first character specifies the format to print:
402  *     i - ip address (32 bits)
403  *     p - ip address pairs (32 bits + 32 bits)
404  *     l - long (32 bits)
405  *     L - unsigned long (32 bits)
406  *     s - short (16 bits)
407  *     b - period-seperated decimal bytes (variable length)
408  *     x - colon-seperated hex bytes (variable length)
409  *     a - ascii string (variable length)
410  *     B - on/off (8 bits)
411  *     $ - special (explicit code to handle)
412  */
413 static const struct tok tag2str[] = {
414 /* RFC1048 tags */
415 	{ TAG_PAD,		" PAD" },
416 	{ TAG_SUBNET_MASK,	"iSubnet-Mask" },	/* subnet mask (RFC950) */
417 	{ TAG_TIME_OFFSET,	"LTime-Zone" },	/* seconds from UTC */
418 	{ TAG_GATEWAY,		"iDefault-Gateway" },	/* default gateway */
419 	{ TAG_TIME_SERVER,	"iTime-Server" },	/* time servers (RFC868) */
420 	{ TAG_NAME_SERVER,	"iIEN-Name-Server" },	/* IEN name servers (IEN116) */
421 	{ TAG_DOMAIN_SERVER,	"iDomain-Name-Server" },	/* domain name (RFC1035) */
422 	{ TAG_LOG_SERVER,	"iLOG" },	/* MIT log servers */
423 	{ TAG_COOKIE_SERVER,	"iCS" },	/* cookie servers (RFC865) */
424 	{ TAG_LPR_SERVER,	"iLPR-Server" },	/* lpr server (RFC1179) */
425 	{ TAG_IMPRESS_SERVER,	"iIM" },	/* impress servers (Imagen) */
426 	{ TAG_RLP_SERVER,	"iRL" },	/* resource location (RFC887) */
427 	{ TAG_HOSTNAME,		"aHostname" },	/* ascii hostname */
428 	{ TAG_BOOTSIZE,		"sBS" },	/* 512 byte blocks */
429 	{ TAG_END,		" END" },
430 /* RFC1497 tags */
431 	{ TAG_DUMPPATH,		"aDP" },
432 	{ TAG_DOMAINNAME,	"aDomain-Name" },
433 	{ TAG_SWAP_SERVER,	"iSS" },
434 	{ TAG_ROOTPATH,		"aRP" },
435 	{ TAG_EXTPATH,		"aEP" },
436 /* RFC2132 tags */
437 	{ TAG_IP_FORWARD,	"BIPF" },
438 	{ TAG_NL_SRCRT,		"BSRT" },
439 	{ TAG_PFILTERS,		"pPF" },
440 	{ TAG_REASS_SIZE,	"sRSZ" },
441 	{ TAG_DEF_TTL,		"bTTL" },
442 	{ TAG_MTU_TIMEOUT,	"lMTU-Timeout" },
443 	{ TAG_MTU_TABLE,	"sMTU-Table" },
444 	{ TAG_INT_MTU,		"sMTU" },
445 	{ TAG_LOCAL_SUBNETS,	"BLSN" },
446 	{ TAG_BROAD_ADDR,	"iBR" },
447 	{ TAG_DO_MASK_DISC,	"BMD" },
448 	{ TAG_SUPPLY_MASK,	"BMS" },
449 	{ TAG_DO_RDISC,		"BRouter-Discovery" },
450 	{ TAG_RTR_SOL_ADDR,	"iRSA" },
451 	{ TAG_STATIC_ROUTE,	"pStatic-Route" },
452 	{ TAG_USE_TRAILERS,	"BUT" },
453 	{ TAG_ARP_TIMEOUT,	"lAT" },
454 	{ TAG_ETH_ENCAP,	"BIE" },
455 	{ TAG_TCP_TTL,		"bTT" },
456 	{ TAG_TCP_KEEPALIVE,	"lKI" },
457 	{ TAG_KEEPALIVE_GO,	"BKG" },
458 	{ TAG_NIS_DOMAIN,	"aYD" },
459 	{ TAG_NIS_SERVERS,	"iYS" },
460 	{ TAG_NTP_SERVERS,	"iNTP" },
461 	{ TAG_VENDOR_OPTS,	"bVendor-Option" },
462 	{ TAG_NETBIOS_NS,	"iNetbios-Name-Server" },
463 	{ TAG_NETBIOS_DDS,	"iWDD" },
464 	{ TAG_NETBIOS_NODE,	"$Netbios-Node" },
465 	{ TAG_NETBIOS_SCOPE,	"aNetbios-Scope" },
466 	{ TAG_XWIN_FS,		"iXFS" },
467 	{ TAG_XWIN_DM,		"iXDM" },
468 	{ TAG_NIS_P_DOMAIN,	"sN+D" },
469 	{ TAG_NIS_P_SERVERS,	"iN+S" },
470 	{ TAG_MOBILE_HOME,	"iMH" },
471 	{ TAG_SMPT_SERVER,	"iSMTP" },
472 	{ TAG_POP3_SERVER,	"iPOP3" },
473 	{ TAG_NNTP_SERVER,	"iNNTP" },
474 	{ TAG_WWW_SERVER,	"iWWW" },
475 	{ TAG_FINGER_SERVER,	"iFG" },
476 	{ TAG_IRC_SERVER,	"iIRC" },
477 	{ TAG_STREETTALK_SRVR,	"iSTS" },
478 	{ TAG_STREETTALK_STDA,	"iSTDA" },
479 	{ TAG_REQUESTED_IP,	"iRequested-IP" },
480 	{ TAG_IP_LEASE,		"lLease-Time" },
481 	{ TAG_OPT_OVERLOAD,	"$OO" },
482 	{ TAG_TFTP_SERVER,	"aTFTP" },
483 	{ TAG_BOOTFILENAME,	"aBF" },
484 	{ TAG_DHCP_MESSAGE,	" DHCP-Message" },
485 	{ TAG_SERVER_ID,	"iServer-ID" },
486 	{ TAG_PARM_REQUEST,	"bParameter-Request" },
487 	{ TAG_MESSAGE,		"aMSG" },
488 	{ TAG_MAX_MSG_SIZE,	"sMSZ" },
489 	{ TAG_RENEWAL_TIME,	"lRN" },
490 	{ TAG_REBIND_TIME,	"lRB" },
491 	{ TAG_VENDOR_CLASS,	"aVendor-Class" },
492 	{ TAG_CLIENT_ID,	"$Client-ID" },
493 /* RFC 2485 */
494 	{ TAG_OPEN_GROUP_UAP,	"aUAP" },
495 /* RFC 2563 */
496 	{ TAG_DISABLE_AUTOCONF,	"BNOAUTO" },
497 /* RFC 2610 */
498 	{ TAG_SLP_DA,		"bSLP-DA" },	/*"b" is a little wrong */
499 	{ TAG_SLP_SCOPE,	"bSLP-SCOPE" },	/*"b" is a little wrong */
500 /* RFC 2937 */
501 	{ TAG_NS_SEARCH,	"sNSSEARCH" },	/* XXX 's' */
502 /* RFC 3004 - The User Class Option for DHCP */
503 	{ TAG_USER_CLASS,	"$User-Class" },
504 /* RFC 3011 */
505 	{ TAG_IP4_SUBNET_SELECT, "iSUBNET" },
506 /* RFC 3442 */
507 	{ TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" },
508 	{ TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" },
509 /* RFC 5859 - TFTP Server Address Option for DHCPv4 */
510 	{ TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" },
511 /* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */
512 	{ TAG_SLP_NAMING_AUTH,	"aSLP-NA" },
513 	{ TAG_CLIENT_FQDN,	"$FQDN" },
514 	{ TAG_AGENT_CIRCUIT,	"$Agent-Information" },
515 	{ TAG_AGENT_REMOTE,	"bARMT" },
516 	{ TAG_AGENT_MASK,	"bAMSK" },
517 	{ TAG_TZ_STRING,	"aTZSTR" },
518 	{ TAG_FQDN_OPTION,	"bFQDNS" },	/* XXX 'b' */
519 	{ TAG_AUTH,		"bAUTH" },	/* XXX 'b' */
520 	{ TAG_VINES_SERVERS,	"iVINES" },
521 	{ TAG_SERVER_RANK,	"sRANK" },
522 	{ TAG_CLIENT_ARCH,	"sARCH" },
523 	{ TAG_CLIENT_NDI,	"bNDI" },	/* XXX 'b' */
524 	{ TAG_CLIENT_GUID,	"bGUID" },	/* XXX 'b' */
525 	{ TAG_LDAP_URL,		"aLDAP" },
526 	{ TAG_6OVER4,		"i6o4" },
527 	{ TAG_TZ_PCODE, 	"aPOSIX-TZ" },
528 	{ TAG_TZ_TCODE, 	"aTZ-Name" },
529 	{ TAG_IPX_COMPAT,	"bIPX" },	/* XXX 'b' */
530 	{ TAG_NETINFO_PARENT,	"iNI" },
531 	{ TAG_NETINFO_PARENT_TAG, "aNITAG" },
532 	{ TAG_URL,		"aURL" },
533 	{ TAG_FAILOVER,		"bFAIL" },	/* XXX 'b' */
534 	{ TAG_MUDURL,           "aMUD-URL" },
535 	{ 0, NULL }
536 };
537 /* 2-byte extended tags */
538 static const struct tok xtag2str[] = {
539 	{ 0, NULL }
540 };
541 
542 /* DHCP "options overload" types */
543 static const struct tok oo2str[] = {
544 	{ 1,	"file" },
545 	{ 2,	"sname" },
546 	{ 3,	"file+sname" },
547 	{ 0, NULL }
548 };
549 
550 /* NETBIOS over TCP/IP node type options */
551 static const struct tok nbo2str[] = {
552 	{ 0x1,	"b-node" },
553 	{ 0x2,	"p-node" },
554 	{ 0x4,	"m-node" },
555 	{ 0x8,	"h-node" },
556 	{ 0, NULL }
557 };
558 
559 /* ARP Hardware types, for Client-ID option */
560 static const struct tok arp2str[] = {
561 	{ 0x1,	"ether" },
562 	{ 0x6,	"ieee802" },
563 	{ 0x7,	"arcnet" },
564 	{ 0xf,	"frelay" },
565 	{ 0x17,	"strip" },
566 	{ 0x18,	"ieee1394" },
567 	{ 0, NULL }
568 };
569 
570 static const struct tok dhcp_msg_values[] = {
571 	{ DHCPDISCOVER,	"Discover" },
572 	{ DHCPOFFER,	"Offer" },
573 	{ DHCPREQUEST,	"Request" },
574 	{ DHCPDECLINE,	"Decline" },
575 	{ DHCPACK,	"ACK" },
576 	{ DHCPNAK,	"NACK" },
577 	{ DHCPRELEASE,	"Release" },
578 	{ DHCPINFORM,	"Inform" },
579 	{ 0, NULL }
580 };
581 
582 #define AGENT_SUBOPTION_CIRCUIT_ID	1	/* RFC 3046 */
583 #define AGENT_SUBOPTION_REMOTE_ID	2	/* RFC 3046 */
584 #define AGENT_SUBOPTION_SUBSCRIBER_ID	6	/* RFC 3993 */
585 static const struct tok agent_suboption_values[] = {
586 	{ AGENT_SUBOPTION_CIRCUIT_ID,    "Circuit-ID" },
587 	{ AGENT_SUBOPTION_REMOTE_ID,     "Remote-ID" },
588 	{ AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" },
589 	{ 0, NULL }
590 };
591 
592 
593 static void
rfc1048_print(netdissect_options * ndo,register const u_char * bp)594 rfc1048_print(netdissect_options *ndo,
595 	      register const u_char *bp)
596 {
597 	register uint16_t tag;
598 	register u_int len;
599 	register const char *cp;
600 	register char c;
601 	int first, idx;
602 	uint32_t ul;
603 	uint16_t us;
604 	uint8_t uc, subopt, suboptlen;
605 
606 	ND_PRINT((ndo, "\n\t  Vendor-rfc1048 Extensions"));
607 
608 	/* Step over magic cookie */
609 	ND_PRINT((ndo, "\n\t    Magic Cookie 0x%08x", EXTRACT_32BITS(bp)));
610 	bp += sizeof(int32_t);
611 
612 	/* Loop while we there is a tag left in the buffer */
613 	while (ND_TTEST2(*bp, 1)) {
614 		tag = *bp++;
615 		if (tag == TAG_PAD && ndo->ndo_vflag < 3)
616 			continue;
617 		if (tag == TAG_END && ndo->ndo_vflag < 3)
618 			return;
619 		if (tag == TAG_EXTENDED_OPTION) {
620 			ND_TCHECK2(*(bp + 1), 2);
621 			tag = EXTRACT_16BITS(bp + 1);
622 			/* XXX we don't know yet if the IANA will
623 			 * preclude overlap of 1-byte and 2-byte spaces.
624 			 * If not, we need to offset tag after this step.
625 			 */
626 			cp = tok2str(xtag2str, "?xT%u", tag);
627 		} else
628 			cp = tok2str(tag2str, "?T%u", tag);
629 		c = *cp++;
630 
631 		if (tag == TAG_PAD || tag == TAG_END)
632 			len = 0;
633 		else {
634 			/* Get the length; check for truncation */
635 			ND_TCHECK2(*bp, 1);
636 			len = *bp++;
637 		}
638 
639 		ND_PRINT((ndo, "\n\t    %s Option %u, length %u%s", cp, tag, len,
640 			  len > 0 ? ": " : ""));
641 
642 		if (tag == TAG_PAD && ndo->ndo_vflag > 2) {
643 			u_int ntag = 1;
644 			while (ND_TTEST2(*bp, 1) && *bp == TAG_PAD) {
645 				bp++;
646 				ntag++;
647 			}
648 			if (ntag > 1)
649 				ND_PRINT((ndo, ", occurs %u", ntag));
650 		}
651 
652 		if (!ND_TTEST2(*bp, len)) {
653 			ND_PRINT((ndo, "[|rfc1048 %u]", len));
654 			return;
655 		}
656 
657 		if (tag == TAG_DHCP_MESSAGE && len == 1) {
658 			uc = *bp++;
659 			ND_PRINT((ndo, "%s", tok2str(dhcp_msg_values, "Unknown (%u)", uc)));
660 			continue;
661 		}
662 
663 		if (tag == TAG_PARM_REQUEST) {
664 			idx = 0;
665 			while (len-- > 0) {
666 				uc = *bp++;
667 				cp = tok2str(tag2str, "?Option %u", uc);
668 				if (idx % 4 == 0)
669 					ND_PRINT((ndo, "\n\t      "));
670 				else
671 					ND_PRINT((ndo, ", "));
672 				ND_PRINT((ndo, "%s", cp + 1));
673 				idx++;
674 			}
675 			continue;
676 		}
677 
678 		if (tag == TAG_EXTENDED_REQUEST) {
679 			first = 1;
680 			while (len > 1) {
681 				len -= 2;
682 				us = EXTRACT_16BITS(bp);
683 				bp += 2;
684 				cp = tok2str(xtag2str, "?xT%u", us);
685 				if (!first)
686 					ND_PRINT((ndo, "+"));
687 				ND_PRINT((ndo, "%s", cp + 1));
688 				first = 0;
689 			}
690 			continue;
691 		}
692 
693 		/* Print data */
694 		if (c == '?') {
695 			/* Base default formats for unknown tags on data size */
696 			if (len & 1)
697 				c = 'b';
698 			else if (len & 2)
699 				c = 's';
700 			else
701 				c = 'l';
702 		}
703 		first = 1;
704 		switch (c) {
705 
706 		case 'a':
707 			/* ascii strings */
708 			ND_PRINT((ndo, "\""));
709 			if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) {
710 				ND_PRINT((ndo, "\""));
711 				goto trunc;
712 			}
713 			ND_PRINT((ndo, "\""));
714 			bp += len;
715 			len = 0;
716 			break;
717 
718 		case 'i':
719 		case 'l':
720 		case 'L':
721 			/* ip addresses/32-bit words */
722 			while (len >= sizeof(ul)) {
723 				if (!first)
724 					ND_PRINT((ndo, ","));
725 				ul = EXTRACT_32BITS(bp);
726 				if (c == 'i') {
727 					ul = htonl(ul);
728 					ND_PRINT((ndo, "%s", ipaddr_string(ndo, &ul)));
729 				} else if (c == 'L')
730 					ND_PRINT((ndo, "%d", ul));
731 				else
732 					ND_PRINT((ndo, "%u", ul));
733 				bp += sizeof(ul);
734 				len -= sizeof(ul);
735 				first = 0;
736 			}
737 			break;
738 
739 		case 'p':
740 			/* IP address pairs */
741 			while (len >= 2*sizeof(ul)) {
742 				if (!first)
743 					ND_PRINT((ndo, ","));
744 				memcpy((char *)&ul, (const char *)bp, sizeof(ul));
745 				ND_PRINT((ndo, "(%s:", ipaddr_string(ndo, &ul)));
746 				bp += sizeof(ul);
747 				memcpy((char *)&ul, (const char *)bp, sizeof(ul));
748 				ND_PRINT((ndo, "%s)", ipaddr_string(ndo, &ul)));
749 				bp += sizeof(ul);
750 				len -= 2*sizeof(ul);
751 				first = 0;
752 			}
753 			break;
754 
755 		case 's':
756 			/* shorts */
757 			while (len >= sizeof(us)) {
758 				if (!first)
759 					ND_PRINT((ndo, ","));
760 				us = EXTRACT_16BITS(bp);
761 				ND_PRINT((ndo, "%u", us));
762 				bp += sizeof(us);
763 				len -= sizeof(us);
764 				first = 0;
765 			}
766 			break;
767 
768 		case 'B':
769 			/* boolean */
770 			while (len > 0) {
771 				if (!first)
772 					ND_PRINT((ndo, ","));
773 				switch (*bp) {
774 				case 0:
775 					ND_PRINT((ndo, "N"));
776 					break;
777 				case 1:
778 					ND_PRINT((ndo, "Y"));
779 					break;
780 				default:
781 					ND_PRINT((ndo, "%u?", *bp));
782 					break;
783 				}
784 				++bp;
785 				--len;
786 				first = 0;
787 			}
788 			break;
789 
790 		case 'b':
791 		case 'x':
792 		default:
793 			/* Bytes */
794 			while (len > 0) {
795 				if (!first)
796 					ND_PRINT((ndo, c == 'x' ? ":" : "."));
797 				if (c == 'x')
798 					ND_PRINT((ndo, "%02x", *bp));
799 				else
800 					ND_PRINT((ndo, "%u", *bp));
801 				++bp;
802 				--len;
803 				first = 0;
804 			}
805 			break;
806 
807 		case '$':
808 			/* Guys we can't handle with one of the usual cases */
809 			switch (tag) {
810 
811 			case TAG_NETBIOS_NODE:
812 				/* this option should be at least 1 byte long */
813 				if (len < 1) {
814 					ND_PRINT((ndo, "ERROR: length < 1 bytes"));
815 					break;
816 				}
817 				tag = *bp++;
818 				--len;
819 				ND_PRINT((ndo, "%s", tok2str(nbo2str, NULL, tag)));
820 				break;
821 
822 			case TAG_OPT_OVERLOAD:
823 				/* this option should be at least 1 byte long */
824 				if (len < 1) {
825 					ND_PRINT((ndo, "ERROR: length < 1 bytes"));
826 					break;
827 				}
828 				tag = *bp++;
829 				--len;
830 				ND_PRINT((ndo, "%s", tok2str(oo2str, NULL, tag)));
831 				break;
832 
833 			case TAG_CLIENT_FQDN:
834 				/* this option should be at least 3 bytes long */
835 				if (len < 3) {
836 					ND_PRINT((ndo, "ERROR: length < 3 bytes"));
837 					bp += len;
838 					len = 0;
839 					break;
840 				}
841 				if (*bp)
842 					ND_PRINT((ndo, "[%s] ", client_fqdn_flags(*bp)));
843 				bp++;
844 				if (*bp || *(bp+1))
845 					ND_PRINT((ndo, "%u/%u ", *bp, *(bp+1)));
846 				bp += 2;
847 				ND_PRINT((ndo, "\""));
848 				if (fn_printn(ndo, bp, len - 3, ndo->ndo_snapend)) {
849 					ND_PRINT((ndo, "\""));
850 					goto trunc;
851 				}
852 				ND_PRINT((ndo, "\""));
853 				bp += len - 3;
854 				len = 0;
855 				break;
856 
857 			case TAG_CLIENT_ID:
858 			    {
859 				int type;
860 
861 				/* this option should be at least 1 byte long */
862 				if (len < 1) {
863 					ND_PRINT((ndo, "ERROR: length < 1 bytes"));
864 					break;
865 				}
866 				type = *bp++;
867 				len--;
868 				if (type == 0) {
869 					ND_PRINT((ndo, "\""));
870 					if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) {
871 						ND_PRINT((ndo, "\""));
872 						goto trunc;
873 					}
874 					ND_PRINT((ndo, "\""));
875 					bp += len;
876 					len = 0;
877 					break;
878 				} else {
879 					ND_PRINT((ndo, "%s ", tok2str(arp2str, "hardware-type %u,", type)));
880 					while (len > 0) {
881 						if (!first)
882 							ND_PRINT((ndo, ":"));
883 						ND_PRINT((ndo, "%02x", *bp));
884 						++bp;
885 						--len;
886 						first = 0;
887 					}
888 				}
889 				break;
890 			    }
891 
892 			case TAG_AGENT_CIRCUIT:
893 				while (len >= 2) {
894 					subopt = *bp++;
895 					suboptlen = *bp++;
896 					len -= 2;
897 					if (suboptlen > len) {
898 						ND_PRINT((ndo, "\n\t      %s SubOption %u, length %u: length goes past end of option",
899 							  tok2str(agent_suboption_values, "Unknown", subopt),
900 							  subopt,
901 							  suboptlen));
902 						bp += len;
903 						len = 0;
904 						break;
905 					}
906 					ND_PRINT((ndo, "\n\t      %s SubOption %u, length %u: ",
907 						  tok2str(agent_suboption_values, "Unknown", subopt),
908 						  subopt,
909 						  suboptlen));
910 					switch (subopt) {
911 
912 					case AGENT_SUBOPTION_CIRCUIT_ID: /* fall through */
913 					case AGENT_SUBOPTION_REMOTE_ID:
914 					case AGENT_SUBOPTION_SUBSCRIBER_ID:
915 						if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend))
916 							goto trunc;
917 						break;
918 
919 					default:
920 						print_unknown_data(ndo, bp, "\n\t\t", suboptlen);
921 					}
922 
923 					len -= suboptlen;
924 					bp += suboptlen;
925 				}
926 				break;
927 
928 			case TAG_CLASSLESS_STATIC_RT:
929 			case TAG_CLASSLESS_STA_RT_MS:
930 			    {
931 				u_int mask_width, significant_octets, i;
932 
933 				/* this option should be at least 5 bytes long */
934 				if (len < 5) {
935 					ND_PRINT((ndo, "ERROR: length < 5 bytes"));
936 					bp += len;
937 					len = 0;
938 					break;
939 				}
940 				while (len > 0) {
941 					if (!first)
942 						ND_PRINT((ndo, ","));
943 					mask_width = *bp++;
944 					len--;
945 					/* mask_width <= 32 */
946 					if (mask_width > 32) {
947 						ND_PRINT((ndo, "[ERROR: Mask width (%d) > 32]", mask_width));
948 						bp += len;
949 						len = 0;
950 						break;
951 					}
952 					significant_octets = (mask_width + 7) / 8;
953 					/* significant octets + router(4) */
954 					if (len < significant_octets + 4) {
955 						ND_PRINT((ndo, "[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4));
956 						bp += len;
957 						len = 0;
958 						break;
959 					}
960 					ND_PRINT((ndo, "("));
961 					if (mask_width == 0)
962 						ND_PRINT((ndo, "default"));
963 					else {
964 						for (i = 0; i < significant_octets ; i++) {
965 							if (i > 0)
966 								ND_PRINT((ndo, "."));
967 							ND_PRINT((ndo, "%d", *bp++));
968 						}
969 						for (i = significant_octets ; i < 4 ; i++)
970 							ND_PRINT((ndo, ".0"));
971 						ND_PRINT((ndo, "/%d", mask_width));
972 					}
973 					memcpy((char *)&ul, (const char *)bp, sizeof(ul));
974 					ND_PRINT((ndo, ":%s)", ipaddr_string(ndo, &ul)));
975 					bp += sizeof(ul);
976 					len -= (significant_octets + 4);
977 					first = 0;
978 				}
979 				break;
980 			    }
981 
982 			case TAG_USER_CLASS:
983 			    {
984 				u_int suboptnumber = 1;
985 
986 				first = 1;
987 				if (len < 2) {
988 					ND_PRINT((ndo, "ERROR: length < 2 bytes"));
989 					bp += len;
990 					len = 0;
991 					break;
992 				}
993 				while (len > 0) {
994 					suboptlen = *bp++;
995 					len--;
996 					ND_PRINT((ndo, "\n\t      "));
997 					ND_PRINT((ndo, "instance#%u: ", suboptnumber));
998 					if (suboptlen == 0) {
999 						ND_PRINT((ndo, "ERROR: suboption length must be non-zero"));
1000 						bp += len;
1001 						len = 0;
1002 						break;
1003 					}
1004 					if (len < suboptlen) {
1005 						ND_PRINT((ndo, "ERROR: invalid option"));
1006 						bp += len;
1007 						len = 0;
1008 						break;
1009 					}
1010 					ND_PRINT((ndo, "\""));
1011 					if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) {
1012 						ND_PRINT((ndo, "\""));
1013 						goto trunc;
1014 					}
1015 					ND_PRINT((ndo, "\""));
1016 					ND_PRINT((ndo, ", length %d", suboptlen));
1017 					suboptnumber++;
1018 					len -= suboptlen;
1019 					bp += suboptlen;
1020 				}
1021 				break;
1022 			    }
1023 
1024 			default:
1025 				ND_PRINT((ndo, "[unknown special tag %u, size %u]",
1026 					  tag, len));
1027 				bp += len;
1028 				len = 0;
1029 				break;
1030 			}
1031 			break;
1032 		}
1033 		/* Data left over? */
1034 		if (len) {
1035 			ND_PRINT((ndo, "\n\t  trailing data length %u", len));
1036 			bp += len;
1037 		}
1038 	}
1039 	return;
1040 trunc:
1041 	ND_PRINT((ndo, "|[rfc1048]"));
1042 }
1043 
1044 static void
cmu_print(netdissect_options * ndo,register const u_char * bp)1045 cmu_print(netdissect_options *ndo,
1046 	  register const u_char *bp)
1047 {
1048 	register const struct cmu_vend *cmu;
1049 
1050 #define PRINTCMUADDR(m, s) { ND_TCHECK(cmu->m); \
1051     if (cmu->m.s_addr != 0) \
1052 	ND_PRINT((ndo, " %s:%s", s, ipaddr_string(ndo, &cmu->m.s_addr))); }
1053 
1054 	ND_PRINT((ndo, " vend-cmu"));
1055 	cmu = (const struct cmu_vend *)bp;
1056 
1057 	/* Only print if there are unknown bits */
1058 	ND_TCHECK(cmu->v_flags);
1059 	if ((cmu->v_flags & ~(VF_SMASK)) != 0)
1060 		ND_PRINT((ndo, " F:0x%x", cmu->v_flags));
1061 	PRINTCMUADDR(v_dgate, "DG");
1062 	PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*");
1063 	PRINTCMUADDR(v_dns1, "NS1");
1064 	PRINTCMUADDR(v_dns2, "NS2");
1065 	PRINTCMUADDR(v_ins1, "IEN1");
1066 	PRINTCMUADDR(v_ins2, "IEN2");
1067 	PRINTCMUADDR(v_ts1, "TS1");
1068 	PRINTCMUADDR(v_ts2, "TS2");
1069 	return;
1070 
1071 trunc:
1072 	ND_PRINT((ndo, "%s", tstr));
1073 #undef PRINTCMUADDR
1074 }
1075 
1076 static char *
client_fqdn_flags(u_int flags)1077 client_fqdn_flags(u_int flags)
1078 {
1079 	static char buf[8+1];
1080 	int i = 0;
1081 
1082 	if (flags & CLIENT_FQDN_FLAGS_S)
1083 		buf[i++] = 'S';
1084 	if (flags & CLIENT_FQDN_FLAGS_O)
1085 		buf[i++] = 'O';
1086 	if (flags & CLIENT_FQDN_FLAGS_E)
1087 		buf[i++] = 'E';
1088 	if (flags & CLIENT_FQDN_FLAGS_N)
1089 		buf[i++] = 'N';
1090 	buf[i] = '\0';
1091 
1092 	return buf;
1093 }
1094