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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_TCHECK(bp->bp_flags);
326 	ND_PRINT((ndo, ", Flags [%s]",
327 		  bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags))));
328 	if (ndo->ndo_vflag > 1)
329 		ND_PRINT((ndo, " (0x%04x)", EXTRACT_16BITS(&bp->bp_flags)));
330 
331 	/* Client's ip address */
332 	ND_TCHECK(bp->bp_ciaddr);
333 	if (EXTRACT_32BITS(&bp->bp_ciaddr.s_addr))
334 		ND_PRINT((ndo, "\n\t  Client-IP %s", ipaddr_string(ndo, &bp->bp_ciaddr)));
335 
336 	/* 'your' ip address (bootp client) */
337 	ND_TCHECK(bp->bp_yiaddr);
338 	if (EXTRACT_32BITS(&bp->bp_yiaddr.s_addr))
339 		ND_PRINT((ndo, "\n\t  Your-IP %s", ipaddr_string(ndo, &bp->bp_yiaddr)));
340 
341 	/* Server's ip address */
342 	ND_TCHECK(bp->bp_siaddr);
343 	if (EXTRACT_32BITS(&bp->bp_siaddr.s_addr))
344 		ND_PRINT((ndo, "\n\t  Server-IP %s", ipaddr_string(ndo, &bp->bp_siaddr)));
345 
346 	/* Gateway's ip address */
347 	ND_TCHECK(bp->bp_giaddr);
348 	if (EXTRACT_32BITS(&bp->bp_giaddr.s_addr))
349 		ND_PRINT((ndo, "\n\t  Gateway-IP %s", ipaddr_string(ndo, &bp->bp_giaddr)));
350 
351 	/* Client's Ethernet address */
352 	if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
353 		ND_TCHECK2(bp->bp_chaddr[0], 6);
354 		ND_PRINT((ndo, "\n\t  Client-Ethernet-Address %s", etheraddr_string(ndo, bp->bp_chaddr)));
355 	}
356 
357 	ND_TCHECK2(bp->bp_sname[0], 1);		/* check first char only */
358 	if (*bp->bp_sname) {
359 		ND_PRINT((ndo, "\n\t  sname \""));
360 		if (fn_printztn(ndo, bp->bp_sname, (u_int)sizeof bp->bp_sname,
361 		    ndo->ndo_snapend)) {
362 			ND_PRINT((ndo, "\""));
363 			ND_PRINT((ndo, "%s", tstr + 1));
364 			return;
365 		}
366 		ND_PRINT((ndo, "\""));
367 	}
368 	ND_TCHECK2(bp->bp_file[0], 1);		/* check first char only */
369 	if (*bp->bp_file) {
370 		ND_PRINT((ndo, "\n\t  file \""));
371 		if (fn_printztn(ndo, bp->bp_file, (u_int)sizeof bp->bp_file,
372 		    ndo->ndo_snapend)) {
373 			ND_PRINT((ndo, "\""));
374 			ND_PRINT((ndo, "%s", tstr + 1));
375 			return;
376 		}
377 		ND_PRINT((ndo, "\""));
378 	}
379 
380 	/* Decode the vendor buffer */
381 	ND_TCHECK(bp->bp_vend[0]);
382 	if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
383 		    sizeof(uint32_t)) == 0)
384 		rfc1048_print(ndo, bp->bp_vend);
385 	else if (memcmp((const char *)bp->bp_vend, vm_cmu,
386 			sizeof(uint32_t)) == 0)
387 		cmu_print(ndo, bp->bp_vend);
388 	else {
389 		uint32_t ul;
390 
391 		ul = EXTRACT_32BITS(&bp->bp_vend);
392 		if (ul != 0)
393 			ND_PRINT((ndo, "\n\t  Vendor-#0x%x", ul));
394 	}
395 
396 	return;
397 trunc:
398 	ND_PRINT((ndo, "%s", tstr));
399 }
400 
401 /*
402  * The first character specifies the format to print:
403  *     i - ip address (32 bits)
404  *     p - ip address pairs (32 bits + 32 bits)
405  *     l - long (32 bits)
406  *     L - unsigned long (32 bits)
407  *     s - short (16 bits)
408  *     b - period-seperated decimal bytes (variable length)
409  *     x - colon-seperated hex bytes (variable length)
410  *     a - ascii string (variable length)
411  *     B - on/off (8 bits)
412  *     $ - special (explicit code to handle)
413  */
414 static const struct tok tag2str[] = {
415 /* RFC1048 tags */
416 	{ TAG_PAD,		" PAD" },
417 	{ TAG_SUBNET_MASK,	"iSubnet-Mask" },	/* subnet mask (RFC950) */
418 	{ TAG_TIME_OFFSET,	"LTime-Zone" },	/* seconds from UTC */
419 	{ TAG_GATEWAY,		"iDefault-Gateway" },	/* default gateway */
420 	{ TAG_TIME_SERVER,	"iTime-Server" },	/* time servers (RFC868) */
421 	{ TAG_NAME_SERVER,	"iIEN-Name-Server" },	/* IEN name servers (IEN116) */
422 	{ TAG_DOMAIN_SERVER,	"iDomain-Name-Server" },	/* domain name (RFC1035) */
423 	{ TAG_LOG_SERVER,	"iLOG" },	/* MIT log servers */
424 	{ TAG_COOKIE_SERVER,	"iCS" },	/* cookie servers (RFC865) */
425 	{ TAG_LPR_SERVER,	"iLPR-Server" },	/* lpr server (RFC1179) */
426 	{ TAG_IMPRESS_SERVER,	"iIM" },	/* impress servers (Imagen) */
427 	{ TAG_RLP_SERVER,	"iRL" },	/* resource location (RFC887) */
428 	{ TAG_HOSTNAME,		"aHostname" },	/* ascii hostname */
429 	{ TAG_BOOTSIZE,		"sBS" },	/* 512 byte blocks */
430 	{ TAG_END,		" END" },
431 /* RFC1497 tags */
432 	{ TAG_DUMPPATH,		"aDP" },
433 	{ TAG_DOMAINNAME,	"aDomain-Name" },
434 	{ TAG_SWAP_SERVER,	"iSS" },
435 	{ TAG_ROOTPATH,		"aRP" },
436 	{ TAG_EXTPATH,		"aEP" },
437 /* RFC2132 tags */
438 	{ TAG_IP_FORWARD,	"BIPF" },
439 	{ TAG_NL_SRCRT,		"BSRT" },
440 	{ TAG_PFILTERS,		"pPF" },
441 	{ TAG_REASS_SIZE,	"sRSZ" },
442 	{ TAG_DEF_TTL,		"bTTL" },
443 	{ TAG_MTU_TIMEOUT,	"lMTU-Timeout" },
444 	{ TAG_MTU_TABLE,	"sMTU-Table" },
445 	{ TAG_INT_MTU,		"sMTU" },
446 	{ TAG_LOCAL_SUBNETS,	"BLSN" },
447 	{ TAG_BROAD_ADDR,	"iBR" },
448 	{ TAG_DO_MASK_DISC,	"BMD" },
449 	{ TAG_SUPPLY_MASK,	"BMS" },
450 	{ TAG_DO_RDISC,		"BRouter-Discovery" },
451 	{ TAG_RTR_SOL_ADDR,	"iRSA" },
452 	{ TAG_STATIC_ROUTE,	"pStatic-Route" },
453 	{ TAG_USE_TRAILERS,	"BUT" },
454 	{ TAG_ARP_TIMEOUT,	"lAT" },
455 	{ TAG_ETH_ENCAP,	"BIE" },
456 	{ TAG_TCP_TTL,		"bTT" },
457 	{ TAG_TCP_KEEPALIVE,	"lKI" },
458 	{ TAG_KEEPALIVE_GO,	"BKG" },
459 	{ TAG_NIS_DOMAIN,	"aYD" },
460 	{ TAG_NIS_SERVERS,	"iYS" },
461 	{ TAG_NTP_SERVERS,	"iNTP" },
462 	{ TAG_VENDOR_OPTS,	"bVendor-Option" },
463 	{ TAG_NETBIOS_NS,	"iNetbios-Name-Server" },
464 	{ TAG_NETBIOS_DDS,	"iWDD" },
465 	{ TAG_NETBIOS_NODE,	"$Netbios-Node" },
466 	{ TAG_NETBIOS_SCOPE,	"aNetbios-Scope" },
467 	{ TAG_XWIN_FS,		"iXFS" },
468 	{ TAG_XWIN_DM,		"iXDM" },
469 	{ TAG_NIS_P_DOMAIN,	"sN+D" },
470 	{ TAG_NIS_P_SERVERS,	"iN+S" },
471 	{ TAG_MOBILE_HOME,	"iMH" },
472 	{ TAG_SMPT_SERVER,	"iSMTP" },
473 	{ TAG_POP3_SERVER,	"iPOP3" },
474 	{ TAG_NNTP_SERVER,	"iNNTP" },
475 	{ TAG_WWW_SERVER,	"iWWW" },
476 	{ TAG_FINGER_SERVER,	"iFG" },
477 	{ TAG_IRC_SERVER,	"iIRC" },
478 	{ TAG_STREETTALK_SRVR,	"iSTS" },
479 	{ TAG_STREETTALK_STDA,	"iSTDA" },
480 	{ TAG_REQUESTED_IP,	"iRequested-IP" },
481 	{ TAG_IP_LEASE,		"lLease-Time" },
482 	{ TAG_OPT_OVERLOAD,	"$OO" },
483 	{ TAG_TFTP_SERVER,	"aTFTP" },
484 	{ TAG_BOOTFILENAME,	"aBF" },
485 	{ TAG_DHCP_MESSAGE,	" DHCP-Message" },
486 	{ TAG_SERVER_ID,	"iServer-ID" },
487 	{ TAG_PARM_REQUEST,	"bParameter-Request" },
488 	{ TAG_MESSAGE,		"aMSG" },
489 	{ TAG_MAX_MSG_SIZE,	"sMSZ" },
490 	{ TAG_RENEWAL_TIME,	"lRN" },
491 	{ TAG_REBIND_TIME,	"lRB" },
492 	{ TAG_VENDOR_CLASS,	"aVendor-Class" },
493 	{ TAG_CLIENT_ID,	"$Client-ID" },
494 /* RFC 2485 */
495 	{ TAG_OPEN_GROUP_UAP,	"aUAP" },
496 /* RFC 2563 */
497 	{ TAG_DISABLE_AUTOCONF,	"BNOAUTO" },
498 /* RFC 2610 */
499 	{ TAG_SLP_DA,		"bSLP-DA" },	/*"b" is a little wrong */
500 	{ TAG_SLP_SCOPE,	"bSLP-SCOPE" },	/*"b" is a little wrong */
501 /* RFC 2937 */
502 	{ TAG_NS_SEARCH,	"sNSSEARCH" },	/* XXX 's' */
503 /* RFC 3004 - The User Class Option for DHCP */
504 	{ TAG_USER_CLASS,	"$User-Class" },
505 /* RFC 3011 */
506 	{ TAG_IP4_SUBNET_SELECT, "iSUBNET" },
507 /* RFC 3442 */
508 	{ TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" },
509 	{ TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" },
510 /* RFC 5859 - TFTP Server Address Option for DHCPv4 */
511 	{ TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" },
512 /* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */
513 	{ TAG_SLP_NAMING_AUTH,	"aSLP-NA" },
514 	{ TAG_CLIENT_FQDN,	"$FQDN" },
515 	{ TAG_AGENT_CIRCUIT,	"$Agent-Information" },
516 	{ TAG_AGENT_REMOTE,	"bARMT" },
517 	{ TAG_AGENT_MASK,	"bAMSK" },
518 	{ TAG_TZ_STRING,	"aTZSTR" },
519 	{ TAG_FQDN_OPTION,	"bFQDNS" },	/* XXX 'b' */
520 	{ TAG_AUTH,		"bAUTH" },	/* XXX 'b' */
521 	{ TAG_VINES_SERVERS,	"iVINES" },
522 	{ TAG_SERVER_RANK,	"sRANK" },
523 	{ TAG_CLIENT_ARCH,	"sARCH" },
524 	{ TAG_CLIENT_NDI,	"bNDI" },	/* XXX 'b' */
525 	{ TAG_CLIENT_GUID,	"bGUID" },	/* XXX 'b' */
526 	{ TAG_LDAP_URL,		"aLDAP" },
527 	{ TAG_6OVER4,		"i6o4" },
528 	{ TAG_TZ_PCODE, 	"aPOSIX-TZ" },
529 	{ TAG_TZ_TCODE, 	"aTZ-Name" },
530 	{ TAG_IPX_COMPAT,	"bIPX" },	/* XXX 'b' */
531 	{ TAG_NETINFO_PARENT,	"iNI" },
532 	{ TAG_NETINFO_PARENT_TAG, "aNITAG" },
533 	{ TAG_URL,		"aURL" },
534 	{ TAG_FAILOVER,		"bFAIL" },	/* XXX 'b' */
535 	{ TAG_MUDURL,           "aMUD-URL" },
536 	{ 0, NULL }
537 };
538 /* 2-byte extended tags */
539 static const struct tok xtag2str[] = {
540 	{ 0, NULL }
541 };
542 
543 /* DHCP "options overload" types */
544 static const struct tok oo2str[] = {
545 	{ 1,	"file" },
546 	{ 2,	"sname" },
547 	{ 3,	"file+sname" },
548 	{ 0, NULL }
549 };
550 
551 /* NETBIOS over TCP/IP node type options */
552 static const struct tok nbo2str[] = {
553 	{ 0x1,	"b-node" },
554 	{ 0x2,	"p-node" },
555 	{ 0x4,	"m-node" },
556 	{ 0x8,	"h-node" },
557 	{ 0, NULL }
558 };
559 
560 /* ARP Hardware types, for Client-ID option */
561 static const struct tok arp2str[] = {
562 	{ 0x1,	"ether" },
563 	{ 0x6,	"ieee802" },
564 	{ 0x7,	"arcnet" },
565 	{ 0xf,	"frelay" },
566 	{ 0x17,	"strip" },
567 	{ 0x18,	"ieee1394" },
568 	{ 0, NULL }
569 };
570 
571 static const struct tok dhcp_msg_values[] = {
572 	{ DHCPDISCOVER,	"Discover" },
573 	{ DHCPOFFER,	"Offer" },
574 	{ DHCPREQUEST,	"Request" },
575 	{ DHCPDECLINE,	"Decline" },
576 	{ DHCPACK,	"ACK" },
577 	{ DHCPNAK,	"NACK" },
578 	{ DHCPRELEASE,	"Release" },
579 	{ DHCPINFORM,	"Inform" },
580 	{ 0, NULL }
581 };
582 
583 #define AGENT_SUBOPTION_CIRCUIT_ID	1	/* RFC 3046 */
584 #define AGENT_SUBOPTION_REMOTE_ID	2	/* RFC 3046 */
585 #define AGENT_SUBOPTION_SUBSCRIBER_ID	6	/* RFC 3993 */
586 static const struct tok agent_suboption_values[] = {
587 	{ AGENT_SUBOPTION_CIRCUIT_ID,    "Circuit-ID" },
588 	{ AGENT_SUBOPTION_REMOTE_ID,     "Remote-ID" },
589 	{ AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" },
590 	{ 0, NULL }
591 };
592 
593 
594 static void
rfc1048_print(netdissect_options * ndo,register const u_char * bp)595 rfc1048_print(netdissect_options *ndo,
596 	      register const u_char *bp)
597 {
598 	register uint16_t tag;
599 	register u_int len;
600 	register const char *cp;
601 	register char c;
602 	int first, idx;
603 	uint32_t ul;
604 	uint16_t us;
605 	uint8_t uc, subopt, suboptlen;
606 
607 	ND_PRINT((ndo, "\n\t  Vendor-rfc1048 Extensions"));
608 
609 	/* Step over magic cookie */
610 	ND_PRINT((ndo, "\n\t    Magic Cookie 0x%08x", EXTRACT_32BITS(bp)));
611 	bp += sizeof(int32_t);
612 
613 	/* Loop while we there is a tag left in the buffer */
614 	while (ND_TTEST2(*bp, 1)) {
615 		tag = *bp++;
616 		if (tag == TAG_PAD && ndo->ndo_vflag < 3)
617 			continue;
618 		if (tag == TAG_END && ndo->ndo_vflag < 3)
619 			return;
620 		if (tag == TAG_EXTENDED_OPTION) {
621 			ND_TCHECK2(*(bp + 1), 2);
622 			tag = EXTRACT_16BITS(bp + 1);
623 			/* XXX we don't know yet if the IANA will
624 			 * preclude overlap of 1-byte and 2-byte spaces.
625 			 * If not, we need to offset tag after this step.
626 			 */
627 			cp = tok2str(xtag2str, "?xT%u", tag);
628 		} else
629 			cp = tok2str(tag2str, "?T%u", tag);
630 		c = *cp++;
631 
632 		if (tag == TAG_PAD || tag == TAG_END)
633 			len = 0;
634 		else {
635 			/* Get the length; check for truncation */
636 			ND_TCHECK2(*bp, 1);
637 			len = *bp++;
638 		}
639 
640 		ND_PRINT((ndo, "\n\t    %s Option %u, length %u%s", cp, tag, len,
641 			  len > 0 ? ": " : ""));
642 
643 		if (tag == TAG_PAD && ndo->ndo_vflag > 2) {
644 			u_int ntag = 1;
645 			while (ND_TTEST2(*bp, 1) && *bp == TAG_PAD) {
646 				bp++;
647 				ntag++;
648 			}
649 			if (ntag > 1)
650 				ND_PRINT((ndo, ", occurs %u", ntag));
651 		}
652 
653 		if (!ND_TTEST2(*bp, len)) {
654 			ND_PRINT((ndo, "[|rfc1048 %u]", len));
655 			return;
656 		}
657 
658 		if (tag == TAG_DHCP_MESSAGE && len == 1) {
659 			uc = *bp++;
660 			ND_PRINT((ndo, "%s", tok2str(dhcp_msg_values, "Unknown (%u)", uc)));
661 			continue;
662 		}
663 
664 		if (tag == TAG_PARM_REQUEST) {
665 			idx = 0;
666 			while (len-- > 0) {
667 				uc = *bp++;
668 				cp = tok2str(tag2str, "?Option %u", uc);
669 				if (idx % 4 == 0)
670 					ND_PRINT((ndo, "\n\t      "));
671 				else
672 					ND_PRINT((ndo, ", "));
673 				ND_PRINT((ndo, "%s", cp + 1));
674 				idx++;
675 			}
676 			continue;
677 		}
678 
679 		if (tag == TAG_EXTENDED_REQUEST) {
680 			first = 1;
681 			while (len > 1) {
682 				len -= 2;
683 				us = EXTRACT_16BITS(bp);
684 				bp += 2;
685 				cp = tok2str(xtag2str, "?xT%u", us);
686 				if (!first)
687 					ND_PRINT((ndo, "+"));
688 				ND_PRINT((ndo, "%s", cp + 1));
689 				first = 0;
690 			}
691 			continue;
692 		}
693 
694 		/* Print data */
695 		if (c == '?') {
696 			/* Base default formats for unknown tags on data size */
697 			if (len & 1)
698 				c = 'b';
699 			else if (len & 2)
700 				c = 's';
701 			else
702 				c = 'l';
703 		}
704 		first = 1;
705 		switch (c) {
706 
707 		case 'a':
708 			/* ascii strings */
709 			ND_PRINT((ndo, "\""));
710 			if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) {
711 				ND_PRINT((ndo, "\""));
712 				goto trunc;
713 			}
714 			ND_PRINT((ndo, "\""));
715 			bp += len;
716 			len = 0;
717 			break;
718 
719 		case 'i':
720 		case 'l':
721 		case 'L':
722 			/* ip addresses/32-bit words */
723 			while (len >= sizeof(ul)) {
724 				if (!first)
725 					ND_PRINT((ndo, ","));
726 				ul = EXTRACT_32BITS(bp);
727 				if (c == 'i') {
728 					ul = htonl(ul);
729 					ND_PRINT((ndo, "%s", ipaddr_string(ndo, &ul)));
730 				} else if (c == 'L')
731 					ND_PRINT((ndo, "%d", ul));
732 				else
733 					ND_PRINT((ndo, "%u", ul));
734 				bp += sizeof(ul);
735 				len -= sizeof(ul);
736 				first = 0;
737 			}
738 			break;
739 
740 		case 'p':
741 			/* IP address pairs */
742 			while (len >= 2*sizeof(ul)) {
743 				if (!first)
744 					ND_PRINT((ndo, ","));
745 				memcpy((char *)&ul, (const char *)bp, sizeof(ul));
746 				ND_PRINT((ndo, "(%s:", ipaddr_string(ndo, &ul)));
747 				bp += sizeof(ul);
748 				memcpy((char *)&ul, (const char *)bp, sizeof(ul));
749 				ND_PRINT((ndo, "%s)", ipaddr_string(ndo, &ul)));
750 				bp += sizeof(ul);
751 				len -= 2*sizeof(ul);
752 				first = 0;
753 			}
754 			break;
755 
756 		case 's':
757 			/* shorts */
758 			while (len >= sizeof(us)) {
759 				if (!first)
760 					ND_PRINT((ndo, ","));
761 				us = EXTRACT_16BITS(bp);
762 				ND_PRINT((ndo, "%u", us));
763 				bp += sizeof(us);
764 				len -= sizeof(us);
765 				first = 0;
766 			}
767 			break;
768 
769 		case 'B':
770 			/* boolean */
771 			while (len > 0) {
772 				if (!first)
773 					ND_PRINT((ndo, ","));
774 				switch (*bp) {
775 				case 0:
776 					ND_PRINT((ndo, "N"));
777 					break;
778 				case 1:
779 					ND_PRINT((ndo, "Y"));
780 					break;
781 				default:
782 					ND_PRINT((ndo, "%u?", *bp));
783 					break;
784 				}
785 				++bp;
786 				--len;
787 				first = 0;
788 			}
789 			break;
790 
791 		case 'b':
792 		case 'x':
793 		default:
794 			/* Bytes */
795 			while (len > 0) {
796 				if (!first)
797 					ND_PRINT((ndo, c == 'x' ? ":" : "."));
798 				if (c == 'x')
799 					ND_PRINT((ndo, "%02x", *bp));
800 				else
801 					ND_PRINT((ndo, "%u", *bp));
802 				++bp;
803 				--len;
804 				first = 0;
805 			}
806 			break;
807 
808 		case '$':
809 			/* Guys we can't handle with one of the usual cases */
810 			switch (tag) {
811 
812 			case TAG_NETBIOS_NODE:
813 				/* this option should be at least 1 byte long */
814 				if (len < 1) {
815 					ND_PRINT((ndo, "ERROR: length < 1 bytes"));
816 					break;
817 				}
818 				tag = *bp++;
819 				--len;
820 				ND_PRINT((ndo, "%s", tok2str(nbo2str, NULL, tag)));
821 				break;
822 
823 			case TAG_OPT_OVERLOAD:
824 				/* this option should be at least 1 byte long */
825 				if (len < 1) {
826 					ND_PRINT((ndo, "ERROR: length < 1 bytes"));
827 					break;
828 				}
829 				tag = *bp++;
830 				--len;
831 				ND_PRINT((ndo, "%s", tok2str(oo2str, NULL, tag)));
832 				break;
833 
834 			case TAG_CLIENT_FQDN:
835 				/* this option should be at least 3 bytes long */
836 				if (len < 3) {
837 					ND_PRINT((ndo, "ERROR: length < 3 bytes"));
838 					bp += len;
839 					len = 0;
840 					break;
841 				}
842 				if (*bp)
843 					ND_PRINT((ndo, "[%s] ", client_fqdn_flags(*bp)));
844 				bp++;
845 				if (*bp || *(bp+1))
846 					ND_PRINT((ndo, "%u/%u ", *bp, *(bp+1)));
847 				bp += 2;
848 				ND_PRINT((ndo, "\""));
849 				if (fn_printn(ndo, bp, len - 3, ndo->ndo_snapend)) {
850 					ND_PRINT((ndo, "\""));
851 					goto trunc;
852 				}
853 				ND_PRINT((ndo, "\""));
854 				bp += len - 3;
855 				len = 0;
856 				break;
857 
858 			case TAG_CLIENT_ID:
859 			    {
860 				int type;
861 
862 				/* this option should be at least 1 byte long */
863 				if (len < 1) {
864 					ND_PRINT((ndo, "ERROR: length < 1 bytes"));
865 					break;
866 				}
867 				type = *bp++;
868 				len--;
869 				if (type == 0) {
870 					ND_PRINT((ndo, "\""));
871 					if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) {
872 						ND_PRINT((ndo, "\""));
873 						goto trunc;
874 					}
875 					ND_PRINT((ndo, "\""));
876 					bp += len;
877 					len = 0;
878 					break;
879 				} else {
880 					ND_PRINT((ndo, "%s ", tok2str(arp2str, "hardware-type %u,", type)));
881 					while (len > 0) {
882 						if (!first)
883 							ND_PRINT((ndo, ":"));
884 						ND_PRINT((ndo, "%02x", *bp));
885 						++bp;
886 						--len;
887 						first = 0;
888 					}
889 				}
890 				break;
891 			    }
892 
893 			case TAG_AGENT_CIRCUIT:
894 				while (len >= 2) {
895 					subopt = *bp++;
896 					suboptlen = *bp++;
897 					len -= 2;
898 					if (suboptlen > len) {
899 						ND_PRINT((ndo, "\n\t      %s SubOption %u, length %u: length goes past end of option",
900 							  tok2str(agent_suboption_values, "Unknown", subopt),
901 							  subopt,
902 							  suboptlen));
903 						bp += len;
904 						len = 0;
905 						break;
906 					}
907 					ND_PRINT((ndo, "\n\t      %s SubOption %u, length %u: ",
908 						  tok2str(agent_suboption_values, "Unknown", subopt),
909 						  subopt,
910 						  suboptlen));
911 					switch (subopt) {
912 
913 					case AGENT_SUBOPTION_CIRCUIT_ID: /* fall through */
914 					case AGENT_SUBOPTION_REMOTE_ID:
915 					case AGENT_SUBOPTION_SUBSCRIBER_ID:
916 						if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend))
917 							goto trunc;
918 						break;
919 
920 					default:
921 						print_unknown_data(ndo, bp, "\n\t\t", suboptlen);
922 					}
923 
924 					len -= suboptlen;
925 					bp += suboptlen;
926 				}
927 				break;
928 
929 			case TAG_CLASSLESS_STATIC_RT:
930 			case TAG_CLASSLESS_STA_RT_MS:
931 			    {
932 				u_int mask_width, significant_octets, i;
933 
934 				/* this option should be at least 5 bytes long */
935 				if (len < 5) {
936 					ND_PRINT((ndo, "ERROR: length < 5 bytes"));
937 					bp += len;
938 					len = 0;
939 					break;
940 				}
941 				while (len > 0) {
942 					if (!first)
943 						ND_PRINT((ndo, ","));
944 					mask_width = *bp++;
945 					len--;
946 					/* mask_width <= 32 */
947 					if (mask_width > 32) {
948 						ND_PRINT((ndo, "[ERROR: Mask width (%d) > 32]", mask_width));
949 						bp += len;
950 						len = 0;
951 						break;
952 					}
953 					significant_octets = (mask_width + 7) / 8;
954 					/* significant octets + router(4) */
955 					if (len < significant_octets + 4) {
956 						ND_PRINT((ndo, "[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4));
957 						bp += len;
958 						len = 0;
959 						break;
960 					}
961 					ND_PRINT((ndo, "("));
962 					if (mask_width == 0)
963 						ND_PRINT((ndo, "default"));
964 					else {
965 						for (i = 0; i < significant_octets ; i++) {
966 							if (i > 0)
967 								ND_PRINT((ndo, "."));
968 							ND_PRINT((ndo, "%d", *bp++));
969 						}
970 						for (i = significant_octets ; i < 4 ; i++)
971 							ND_PRINT((ndo, ".0"));
972 						ND_PRINT((ndo, "/%d", mask_width));
973 					}
974 					memcpy((char *)&ul, (const char *)bp, sizeof(ul));
975 					ND_PRINT((ndo, ":%s)", ipaddr_string(ndo, &ul)));
976 					bp += sizeof(ul);
977 					len -= (significant_octets + 4);
978 					first = 0;
979 				}
980 				break;
981 			    }
982 
983 			case TAG_USER_CLASS:
984 			    {
985 				u_int suboptnumber = 1;
986 
987 				first = 1;
988 				if (len < 2) {
989 					ND_PRINT((ndo, "ERROR: length < 2 bytes"));
990 					bp += len;
991 					len = 0;
992 					break;
993 				}
994 				while (len > 0) {
995 					suboptlen = *bp++;
996 					len--;
997 					ND_PRINT((ndo, "\n\t      "));
998 					ND_PRINT((ndo, "instance#%u: ", suboptnumber));
999 					if (suboptlen == 0) {
1000 						ND_PRINT((ndo, "ERROR: suboption length must be non-zero"));
1001 						bp += len;
1002 						len = 0;
1003 						break;
1004 					}
1005 					if (len < suboptlen) {
1006 						ND_PRINT((ndo, "ERROR: invalid option"));
1007 						bp += len;
1008 						len = 0;
1009 						break;
1010 					}
1011 					ND_PRINT((ndo, "\""));
1012 					if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) {
1013 						ND_PRINT((ndo, "\""));
1014 						goto trunc;
1015 					}
1016 					ND_PRINT((ndo, "\""));
1017 					ND_PRINT((ndo, ", length %d", suboptlen));
1018 					suboptnumber++;
1019 					len -= suboptlen;
1020 					bp += suboptlen;
1021 				}
1022 				break;
1023 			    }
1024 
1025 			default:
1026 				ND_PRINT((ndo, "[unknown special tag %u, size %u]",
1027 					  tag, len));
1028 				bp += len;
1029 				len = 0;
1030 				break;
1031 			}
1032 			break;
1033 		}
1034 		/* Data left over? */
1035 		if (len) {
1036 			ND_PRINT((ndo, "\n\t  trailing data length %u", len));
1037 			bp += len;
1038 		}
1039 	}
1040 	return;
1041 trunc:
1042 	ND_PRINT((ndo, "|[rfc1048]"));
1043 }
1044 
1045 static void
cmu_print(netdissect_options * ndo,register const u_char * bp)1046 cmu_print(netdissect_options *ndo,
1047 	  register const u_char *bp)
1048 {
1049 	register const struct cmu_vend *cmu;
1050 
1051 #define PRINTCMUADDR(m, s) { ND_TCHECK(cmu->m); \
1052     if (cmu->m.s_addr != 0) \
1053 	ND_PRINT((ndo, " %s:%s", s, ipaddr_string(ndo, &cmu->m.s_addr))); }
1054 
1055 	ND_PRINT((ndo, " vend-cmu"));
1056 	cmu = (const struct cmu_vend *)bp;
1057 
1058 	/* Only print if there are unknown bits */
1059 	ND_TCHECK(cmu->v_flags);
1060 	if ((cmu->v_flags & ~(VF_SMASK)) != 0)
1061 		ND_PRINT((ndo, " F:0x%x", cmu->v_flags));
1062 	PRINTCMUADDR(v_dgate, "DG");
1063 	PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*");
1064 	PRINTCMUADDR(v_dns1, "NS1");
1065 	PRINTCMUADDR(v_dns2, "NS2");
1066 	PRINTCMUADDR(v_ins1, "IEN1");
1067 	PRINTCMUADDR(v_ins2, "IEN2");
1068 	PRINTCMUADDR(v_ts1, "TS1");
1069 	PRINTCMUADDR(v_ts2, "TS2");
1070 	return;
1071 
1072 trunc:
1073 	ND_PRINT((ndo, "%s", tstr));
1074 #undef PRINTCMUADDR
1075 }
1076 
1077 static char *
client_fqdn_flags(u_int flags)1078 client_fqdn_flags(u_int flags)
1079 {
1080 	static char buf[8+1];
1081 	int i = 0;
1082 
1083 	if (flags & CLIENT_FQDN_FLAGS_S)
1084 		buf[i++] = 'S';
1085 	if (flags & CLIENT_FQDN_FLAGS_O)
1086 		buf[i++] = 'O';
1087 	if (flags & CLIENT_FQDN_FLAGS_E)
1088 		buf[i++] = 'E';
1089 	if (flags & CLIENT_FQDN_FLAGS_N)
1090 		buf[i++] = 'N';
1091 	buf[i] = '\0';
1092 
1093 	return buf;
1094 }
1095