contrib/tcpdump/print-bootp.c

   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
  37 /*
  38  * Bootstrap Protocol (BOOTP).  RFC951 and RFC1048.
  39  *
  40  * This file specifies the "implementation-independent" BOOTP protocol
  41  * information which is common to both client and server.
  42  *
  43  * Copyright 1988 by Carnegie Mellon.
  44  *
  45  * Permission to use, copy, modify, and distribute this program for any
  46  * purpose and without fee is hereby granted, provided that this copyright
  47  * and permission notice appear on all copies and supporting documentation,
  48  * the name of Carnegie Mellon not be used in advertising or publicity
  49  * pertaining to distribution of the program without specific prior
  50  * permission, and notice be given in supporting documentation that copying
  51  * and distribution is by permission of Carnegie Mellon and Stanford
  52  * University.  Carnegie Mellon makes no representations about the
  53  * suitability of this software for any purpose.  It is provided "as is"
  54  * without express or implied warranty.
  55  */
  56
  57 struct bootp {
  58         nd_uint8_t      bp_op;          /* packet opcode type */
  59         nd_uint8_t      bp_htype;       /* hardware addr type */
  60         nd_uint8_t      bp_hlen;        /* hardware addr length */
  61         nd_uint8_t      bp_hops;        /* gateway hops */
  62         nd_uint32_t     bp_xid;         /* transaction ID */
  63         nd_uint16_t     bp_secs;        /* seconds since boot began */
  64         nd_uint16_t     bp_flags;       /* flags - see bootp_flag_values[]
  65                                            in print-bootp.c */
  66         nd_ipv4         bp_ciaddr;      /* client IP address */
  67         nd_ipv4         bp_yiaddr;      /* 'your' IP address */
  68         nd_ipv4         bp_siaddr;      /* server IP address */
  69         nd_ipv4         bp_giaddr;      /* gateway IP address */
  70         nd_byte         bp_chaddr[16];  /* client hardware address */
  71         nd_byte         bp_sname[64];   /* server host name */
  72         nd_byte         bp_file[128];   /* boot file name */
  73         nd_byte         bp_vend[64];    /* vendor-specific area */
  74 };
  75
  76 #define BOOTPREPLY      2
  77 #define BOOTPREQUEST    1
  78
  79 /*
  80  * Vendor magic cookie (v_magic) for CMU
  81  */
  82 #define VM_CMU          "CMU"
  83
  84 /*
  85  * Vendor magic cookie (v_magic) for RFC1048
  86  */
  87 #define VM_RFC1048      { 99, 130, 83, 99 }
  88
  89 /*
  90  * RFC1048 tag values used to specify what information is being supplied in
  91  * the vendor field of the packet.
  92  */
  93
  94 #define TAG_PAD                 ((uint8_t)   0)
  95 #define TAG_SUBNET_MASK         ((uint8_t)   1)
  96 #define TAG_TIME_OFFSET         ((uint8_t)   2)
  97 #define TAG_GATEWAY             ((uint8_t)   3)
  98 #define TAG_TIME_SERVER         ((uint8_t)   4)
  99 #define TAG_NAME_SERVER         ((uint8_t)   5)
 100 #define TAG_DOMAIN_SERVER       ((uint8_t)   6)
 101 #define TAG_LOG_SERVER          ((uint8_t)   7)
 102 #define TAG_COOKIE_SERVER       ((uint8_t)   8)
 103 #define TAG_LPR_SERVER          ((uint8_t)   9)
 104 #define TAG_IMPRESS_SERVER      ((uint8_t)  10)
 105 #define TAG_RLP_SERVER          ((uint8_t)  11)
 106 #define TAG_HOSTNAME            ((uint8_t)  12)
 107 #define TAG_BOOTSIZE            ((uint8_t)  13)
 108 #define TAG_END                 ((uint8_t) 255)
 109 /* RFC1497 tags */
 110 #define TAG_DUMPPATH            ((uint8_t)  14)
 111 #define TAG_DOMAINNAME          ((uint8_t)  15)
 112 #define TAG_SWAP_SERVER         ((uint8_t)  16)
 113 #define TAG_ROOTPATH            ((uint8_t)  17)
 114 #define TAG_EXTPATH             ((uint8_t)  18)
 115 /* RFC2132 */
 116 #define TAG_IP_FORWARD          ((uint8_t)  19)
 117 #define TAG_NL_SRCRT            ((uint8_t)  20)
 118 #define TAG_PFILTERS            ((uint8_t)  21)
 119 #define TAG_REASS_SIZE          ((uint8_t)  22)
 120 #define TAG_DEF_TTL             ((uint8_t)  23)
 121 #define TAG_MTU_TIMEOUT         ((uint8_t)  24)
 122 #define TAG_MTU_TABLE           ((uint8_t)  25)
 123 #define TAG_INT_MTU             ((uint8_t)  26)
 124 #define TAG_LOCAL_SUBNETS       ((uint8_t)  27)
 125 #define TAG_BROAD_ADDR          ((uint8_t)  28)
 126 #define TAG_DO_MASK_DISC        ((uint8_t)  29)
 127 #define TAG_SUPPLY_MASK         ((uint8_t)  30)
 128 #define TAG_DO_RDISC            ((uint8_t)  31)
 129 #define TAG_RTR_SOL_ADDR        ((uint8_t)  32)
 130 #define TAG_STATIC_ROUTE        ((uint8_t)  33)
 131 #define TAG_USE_TRAILERS        ((uint8_t)  34)
 132 #define TAG_ARP_TIMEOUT         ((uint8_t)  35)
 133 #define TAG_ETH_ENCAP           ((uint8_t)  36)
 134 #define TAG_TCP_TTL             ((uint8_t)  37)
 135 #define TAG_TCP_KEEPALIVE       ((uint8_t)  38)
 136 #define TAG_KEEPALIVE_GO        ((uint8_t)  39)
 137 #define TAG_NIS_DOMAIN          ((uint8_t)  40)
 138 #define TAG_NIS_SERVERS         ((uint8_t)  41)
 139 #define TAG_NTP_SERVERS         ((uint8_t)  42)
 140 #define TAG_VENDOR_OPTS         ((uint8_t)  43)
 141 #define TAG_NETBIOS_NS          ((uint8_t)  44)
 142 #define TAG_NETBIOS_DDS         ((uint8_t)  45)
 143 #define TAG_NETBIOS_NODE        ((uint8_t)  46)
 144 #define TAG_NETBIOS_SCOPE       ((uint8_t)  47)
 145 #define TAG_XWIN_FS             ((uint8_t)  48)
 146 #define TAG_XWIN_DM             ((uint8_t)  49)
 147 #define TAG_NIS_P_DOMAIN        ((uint8_t)  64)
 148 #define TAG_NIS_P_SERVERS       ((uint8_t)  65)
 149 #define TAG_MOBILE_HOME         ((uint8_t)  68)
 150 #define TAG_SMPT_SERVER         ((uint8_t)  69)
 151 #define TAG_POP3_SERVER         ((uint8_t)  70)
 152 #define TAG_NNTP_SERVER         ((uint8_t)  71)
 153 #define TAG_WWW_SERVER          ((uint8_t)  72)
 154 #define TAG_FINGER_SERVER       ((uint8_t)  73)
 155 #define TAG_IRC_SERVER          ((uint8_t)  74)
 156 #define TAG_STREETTALK_SRVR     ((uint8_t)  75)
 157 #define TAG_STREETTALK_STDA     ((uint8_t)  76)
 158 /* DHCP options */
 159 #define TAG_REQUESTED_IP        ((uint8_t)  50)
 160 #define TAG_IP_LEASE            ((uint8_t)  51)
 161 #define TAG_OPT_OVERLOAD        ((uint8_t)  52)
 162 #define TAG_TFTP_SERVER         ((uint8_t)  66)
 163 #define TAG_BOOTFILENAME        ((uint8_t)  67)
 164 #define TAG_DHCP_MESSAGE        ((uint8_t)  53)
 165 #define TAG_SERVER_ID           ((uint8_t)  54)
 166 #define TAG_PARM_REQUEST        ((uint8_t)  55)
 167 #define TAG_MESSAGE             ((uint8_t)  56)
 168 #define TAG_MAX_MSG_SIZE        ((uint8_t)  57)
 169 #define TAG_RENEWAL_TIME        ((uint8_t)  58)
 170 #define TAG_REBIND_TIME         ((uint8_t)  59)
 171 #define TAG_VENDOR_CLASS        ((uint8_t)  60)
 172 #define TAG_CLIENT_ID           ((uint8_t)  61)
 173 /* RFC 2241 */
 174 #define TAG_NDS_SERVERS         ((uint8_t)  85)
 175 #define TAG_NDS_TREE_NAME       ((uint8_t)  86)
 176 #define TAG_NDS_CONTEXT         ((uint8_t)  87)
 177 /* RFC 2242 */
 178 #define TAG_NDS_IPDOMAIN        ((uint8_t)  62)
 179 #define TAG_NDS_IPINFO          ((uint8_t)  63)
 180 /* RFC 2485 */
 181 #define TAG_OPEN_GROUP_UAP      ((uint8_t)  98)
 182 /* RFC 2563 */
 183 #define TAG_DISABLE_AUTOCONF    ((uint8_t) 116)
 184 /* RFC 2610 */
 185 #define TAG_SLP_DA              ((uint8_t)  78)
 186 #define TAG_SLP_SCOPE           ((uint8_t)  79)
 187 /* RFC 2937 */
 188 #define TAG_NS_SEARCH           ((uint8_t) 117)
 189 /* RFC 3004 - The User Class Option for DHCP */
 190 #define TAG_USER_CLASS          ((uint8_t)  77)
 191 /* RFC 3011 */
 192 #define TAG_IP4_SUBNET_SELECT   ((uint8_t) 118)
 193 /* RFC 3442 */
 194 #define TAG_CLASSLESS_STATIC_RT ((uint8_t) 121)
 195 #define TAG_CLASSLESS_STA_RT_MS ((uint8_t) 249)
 196 /* RFC 5859 - TFTP Server Address Option for DHCPv4 */
 197 #define TAG_TFTP_SERVER_ADDRESS ((uint8_t) 150)
 198 /* https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml */
 199 #define TAG_SLP_NAMING_AUTH     ((uint8_t)  80)
 200 #define TAG_CLIENT_FQDN         ((uint8_t)  81)
 201 #define TAG_AGENT_CIRCUIT       ((uint8_t)  82)
 202 #define TAG_AGENT_REMOTE        ((uint8_t)  83)
 203 #define TAG_TZ_STRING           ((uint8_t)  88)
 204 #define TAG_FQDN_OPTION         ((uint8_t)  89)
 205 #define TAG_AUTH                ((uint8_t)  90)
 206 #define TAG_CLIENT_LAST_TRANSACTION_TIME        ((uint8_t)  91)
 207 #define TAG_ASSOCIATED_IP                       ((uint8_t)  92)
 208 #define TAG_CLIENT_ARCH         ((uint8_t)  93)
 209 #define TAG_CLIENT_NDI          ((uint8_t)  94)
 210 #define TAG_CLIENT_GUID         ((uint8_t)  97)
 211 #define TAG_LDAP_URL            ((uint8_t)  95)
 212 /* RFC 4833, TZ codes */
 213 #define TAG_TZ_PCODE            ((uint8_t) 100)
 214 #define TAG_TZ_TCODE            ((uint8_t) 101)
 215 #define TAG_NETINFO_PARENT      ((uint8_t) 112)
 216 #define TAG_NETINFO_PARENT_TAG  ((uint8_t) 113)
 217 #define TAG_URL                 ((uint8_t) 114)
 218 #define TAG_MUDURL              ((uint8_t) 161)
 219
 220 /* DHCP Message types (values for TAG_DHCP_MESSAGE option) */
 221 #define DHCPDISCOVER    1
 222 #define DHCPOFFER       2
 223 #define DHCPREQUEST     3
 224 #define DHCPDECLINE     4
 225 #define DHCPACK         5
 226 #define DHCPNAK         6
 227 #define DHCPRELEASE     7
 228 #define DHCPINFORM      8
 229 /* Defined in RFC4388 */
 230 #define DHCPLEASEQUERY       10
 231 #define DHCPLEASEUNASSIGNED  11
 232 #define DHCPLEASEUNKNOWN     12
 233 #define DHCPLEASEACTIVE      13
 234
 235
 236 /*
 237  * "vendor" data permitted for CMU bootp clients.
 238  */
 239
 240 struct cmu_vend {
 241         nd_byte         v_magic[4];     /* magic number */
 242         nd_uint32_t     v_flags;        /* flags/opcodes, etc. */
 243         nd_ipv4         v_smask;        /* Subnet mask */
 244         nd_ipv4         v_dgate;        /* Default gateway */
 245         nd_ipv4         v_dns1, v_dns2; /* Domain name servers */
 246         nd_ipv4         v_ins1, v_ins2; /* IEN-116 name servers */
 247         nd_ipv4         v_ts1, v_ts2;   /* Time servers */
 248         nd_byte         v_unused[24];   /* currently unused */
 249 };
 250
 251
 252 /* v_flags values */
 253 #define VF_SMASK        1       /* Subnet mask field contains valid data */
 254
 255 /* RFC 4702 DHCP Client FQDN Option */
 256
 257 #define CLIENT_FQDN_FLAGS_S     0x01
 258 #define CLIENT_FQDN_FLAGS_O     0x02
 259 #define CLIENT_FQDN_FLAGS_E     0x04
 260 #define CLIENT_FQDN_FLAGS_N     0x08
 261 /* end of original bootp.h */
 262
 263 static void rfc1048_print(netdissect_options *, const u_char *);
 264 static void cmu_print(netdissect_options *, const u_char *);
 265 static char *client_fqdn_flags(u_int flags);
 266
 267 static const struct tok bootp_flag_values[] = {
 268         { 0x8000,       "Broadcast" },
 269         { 0, NULL}
 270 };
 271
 272 static const struct tok bootp_op_values[] = {
 273         { BOOTPREQUEST, "Request" },
 274         { BOOTPREPLY,   "Reply" },
 275         { 0, NULL}
 276 };
 277
 278 /*
 279  * Print bootp requests
 280  */
 281 void
 282 bootp_print(netdissect_options *ndo,
 283             const u_char *cp, u_int length)
 284 {
 285         const struct bootp *bp;
 286         static const u_char vm_cmu[4] = VM_CMU;
 287         static const u_char vm_rfc1048[4] = VM_RFC1048;
 288         uint8_t bp_op, bp_htype, bp_hlen;
 289
 290         ndo->ndo_protocol = "bootp";
 291         bp = (const struct bootp *)cp;
 292         bp_op = GET_U_1(bp->bp_op);
 293         ND_PRINT("BOOTP/DHCP, %s",
 294                   tok2str(bootp_op_values, "unknown (0x%02x)", bp_op));
 295
 296         bp_htype = GET_U_1(bp->bp_htype);
 297         bp_hlen = GET_U_1(bp->bp_hlen);
 298         if (bp_htype == 1 && bp_hlen == MAC_ADDR_LEN && bp_op == BOOTPREQUEST) {
 299                 ND_PRINT(" from %s", GET_ETHERADDR_STRING(bp->bp_chaddr));
 300         }
 301
 302         ND_PRINT(", length %u", length);
 303
 304         if (!ndo->ndo_vflag)
 305                 return;
 306
 307         ND_TCHECK_2(bp->bp_secs);
 308
 309         /* The usual hardware address type is 1 (10Mb Ethernet) */
 310         if (bp_htype != 1)
 311                 ND_PRINT(", htype %u", bp_htype);
 312
 313         /* The usual length for 10Mb Ethernet address is 6 bytes */
 314         if (bp_htype != 1 || bp_hlen != MAC_ADDR_LEN)
 315                 ND_PRINT(", hlen %u", bp_hlen);
 316
 317         /* Only print interesting fields */
 318         if (GET_U_1(bp->bp_hops))
 319                 ND_PRINT(", hops %u", GET_U_1(bp->bp_hops));
 320         if (GET_BE_U_4(bp->bp_xid))
 321                 ND_PRINT(", xid 0x%x", GET_BE_U_4(bp->bp_xid));
 322         if (GET_BE_U_2(bp->bp_secs))
 323                 ND_PRINT(", secs %u", GET_BE_U_2(bp->bp_secs));
 324
 325         ND_PRINT(", Flags [%s]",
 326                   bittok2str(bootp_flag_values, "none", GET_BE_U_2(bp->bp_flags)));
 327         if (ndo->ndo_vflag > 1)
 328                 ND_PRINT(" (0x%04x)", GET_BE_U_2(bp->bp_flags));
 329
 330         /* Client's ip address */
 331         if (GET_IPV4_TO_NETWORK_ORDER(bp->bp_ciaddr))
 332                 ND_PRINT("\n\t  Client-IP %s", GET_IPADDR_STRING(bp->bp_ciaddr));
 333
 334         /* 'your' ip address (bootp client) */
 335         if (GET_IPV4_TO_NETWORK_ORDER(bp->bp_yiaddr))
 336                 ND_PRINT("\n\t  Your-IP %s", GET_IPADDR_STRING(bp->bp_yiaddr));
 337
 338         /* Server's ip address */
 339         if (GET_IPV4_TO_NETWORK_ORDER(bp->bp_siaddr))
 340                 ND_PRINT("\n\t  Server-IP %s", GET_IPADDR_STRING(bp->bp_siaddr));
 341
 342         /* Gateway's ip address */
 343         if (GET_IPV4_TO_NETWORK_ORDER(bp->bp_giaddr))
 344                 ND_PRINT("\n\t  Gateway-IP %s", GET_IPADDR_STRING(bp->bp_giaddr));
 345
 346         /* Client's Ethernet address */
 347         if (bp_htype == 1 && bp_hlen == MAC_ADDR_LEN) {
 348                 ND_PRINT("\n\t  Client-Ethernet-Address %s", GET_ETHERADDR_STRING(bp->bp_chaddr));
 349         }
 350
 351         if (GET_U_1(bp->bp_sname)) {    /* get first char only */
 352                 ND_PRINT("\n\t  sname \"");
 353                 if (nd_printztn(ndo, bp->bp_sname, (u_int)sizeof(bp->bp_sname),
 354                                 ndo->ndo_snapend) == 0) {
 355                         ND_PRINT("\"");
 356                         nd_print_trunc(ndo);
 357                         return;
 358                 }
 359                 ND_PRINT("\"");
 360         }
 361         if (GET_U_1(bp->bp_file)) {     /* get first char only */
 362                 ND_PRINT("\n\t  file \"");
 363                 if (nd_printztn(ndo, bp->bp_file, (u_int)sizeof(bp->bp_file),
 364                                 ndo->ndo_snapend) == 0) {
 365                         ND_PRINT("\"");
 366                         nd_print_trunc(ndo);
 367                         return;
 368                 }
 369                 ND_PRINT("\"");
 370         }
 371
 372         /* Decode the vendor buffer */
 373         ND_TCHECK_4(bp->bp_vend);
 374         if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
 375                     sizeof(uint32_t)) == 0)
 376                 rfc1048_print(ndo, bp->bp_vend);
 377         else if (memcmp((const char *)bp->bp_vend, vm_cmu,
 378                         sizeof(uint32_t)) == 0)
 379                 cmu_print(ndo, bp->bp_vend);
 380         else {
 381                 uint32_t ul;
 382
 383                 ul = GET_BE_U_4(bp->bp_vend);
 384                 if (ul != 0)
 385                         ND_PRINT("\n\t  Vendor-#0x%x", ul);
 386         }
 387
 388         return;
 389 trunc:
 390         nd_print_trunc(ndo);
 391 }
 392
 393 /*
 394  * The first character specifies the format to print:
 395  *     i - ip address (32 bits)
 396  *     p - ip address pairs (32 bits + 32 bits)
 397  *     l - long (32 bits)
 398  *     L - unsigned long (32 bits)
 399  *     s - short (16 bits)
 400  *     b - period-separated decimal bytes (variable length)
 401  *     x - colon-separated hex bytes (variable length)
 402  *     a - ASCII string (variable length)
 403  *     B - on/off (8 bits)
 404  *     $ - special (explicit code to handle)
 405  */
 406 static const struct tok tag2str[] = {
 407 /* RFC1048 tags */
 408         { TAG_PAD,              " PAD" },
 409         { TAG_SUBNET_MASK,      "iSubnet-Mask" },       /* subnet mask (RFC950) */
 410         { TAG_TIME_OFFSET,      "LTime-Zone" }, /* seconds from UTC */
 411         { TAG_GATEWAY,          "iDefault-Gateway" },   /* default gateway */
 412         { TAG_TIME_SERVER,      "iTime-Server" },       /* time servers (RFC868) */
 413         { TAG_NAME_SERVER,      "iIEN-Name-Server" },   /* IEN name servers (IEN116) */
 414         { TAG_DOMAIN_SERVER,    "iDomain-Name-Server" },        /* domain name (RFC1035) */
 415         { TAG_LOG_SERVER,       "iLOG" },       /* MIT log servers */
 416         { TAG_COOKIE_SERVER,    "iCS" },        /* cookie servers (RFC865) */
 417         { TAG_LPR_SERVER,       "iLPR-Server" },        /* lpr server (RFC1179) */
 418         { TAG_IMPRESS_SERVER,   "iIM" },        /* impress servers (Imagen) */
 419         { TAG_RLP_SERVER,       "iRL" },        /* resource location (RFC887) */
 420         { TAG_HOSTNAME,         "aHostname" },  /* ASCII hostname */
 421         { TAG_BOOTSIZE,         "sBS" },        /* 512 byte blocks */
 422         { TAG_END,              " END" },
 423 /* RFC1497 tags */
 424         { TAG_DUMPPATH,         "aDP" },
 425         { TAG_DOMAINNAME,       "aDomain-Name" },
 426         { TAG_SWAP_SERVER,      "iSS" },
 427         { TAG_ROOTPATH,         "aRP" },
 428         { TAG_EXTPATH,          "aEP" },
 429 /* RFC2132 tags */
 430         { TAG_IP_FORWARD,       "BIPF" },
 431         { TAG_NL_SRCRT,         "BSRT" },
 432         { TAG_PFILTERS,         "pPF" },
 433         { TAG_REASS_SIZE,       "sRSZ" },
 434         { TAG_DEF_TTL,          "bTTL" },
 435         { TAG_MTU_TIMEOUT,      "lMTU-Timeout" },
 436         { TAG_MTU_TABLE,        "sMTU-Table" },
 437         { TAG_INT_MTU,          "sMTU" },
 438         { TAG_LOCAL_SUBNETS,    "BLSN" },
 439         { TAG_BROAD_ADDR,       "iBR" },
 440         { TAG_DO_MASK_DISC,     "BMD" },
 441         { TAG_SUPPLY_MASK,      "BMS" },
 442         { TAG_DO_RDISC,         "BRouter-Discovery" },
 443         { TAG_RTR_SOL_ADDR,     "iRSA" },
 444         { TAG_STATIC_ROUTE,     "pStatic-Route" },
 445         { TAG_USE_TRAILERS,     "BUT" },
 446         { TAG_ARP_TIMEOUT,      "lAT" },
 447         { TAG_ETH_ENCAP,        "BIE" },
 448         { TAG_TCP_TTL,          "bTT" },
 449         { TAG_TCP_KEEPALIVE,    "lKI" },
 450         { TAG_KEEPALIVE_GO,     "BKG" },
 451         { TAG_NIS_DOMAIN,       "aYD" },
 452         { TAG_NIS_SERVERS,      "iYS" },
 453         { TAG_NTP_SERVERS,      "iNTP" },
 454         { TAG_VENDOR_OPTS,      "bVendor-Option" },
 455         { TAG_NETBIOS_NS,       "iNetbios-Name-Server" },
 456         { TAG_NETBIOS_DDS,      "iWDD" },
 457         { TAG_NETBIOS_NODE,     "$Netbios-Node" },
 458         { TAG_NETBIOS_SCOPE,    "aNetbios-Scope" },
 459         { TAG_XWIN_FS,          "iXFS" },
 460         { TAG_XWIN_DM,          "iXDM" },
 461         { TAG_NIS_P_DOMAIN,     "sN+D" },
 462         { TAG_NIS_P_SERVERS,    "iN+S" },
 463         { TAG_MOBILE_HOME,      "iMH" },
 464         { TAG_SMPT_SERVER,      "iSMTP" },
 465         { TAG_POP3_SERVER,      "iPOP3" },
 466         { TAG_NNTP_SERVER,      "iNNTP" },
 467         { TAG_WWW_SERVER,       "iWWW" },
 468         { TAG_FINGER_SERVER,    "iFG" },
 469         { TAG_IRC_SERVER,       "iIRC" },
 470         { TAG_STREETTALK_SRVR,  "iSTS" },
 471         { TAG_STREETTALK_STDA,  "iSTDA" },
 472         { TAG_REQUESTED_IP,     "iRequested-IP" },
 473         { TAG_IP_LEASE,         "lLease-Time" },
 474         { TAG_OPT_OVERLOAD,     "$OO" },
 475         { TAG_TFTP_SERVER,      "aTFTP" },
 476         { TAG_BOOTFILENAME,     "aBF" },
 477         { TAG_DHCP_MESSAGE,     " DHCP-Message" },
 478         { TAG_SERVER_ID,        "iServer-ID" },
 479         { TAG_PARM_REQUEST,     "bParameter-Request" },
 480         { TAG_MESSAGE,          "aMSG" },
 481         { TAG_MAX_MSG_SIZE,     "sMSZ" },
 482         { TAG_RENEWAL_TIME,     "lRN" },
 483         { TAG_REBIND_TIME,      "lRB" },
 484         { TAG_VENDOR_CLASS,     "aVendor-Class" },
 485         { TAG_CLIENT_ID,        "$Client-ID" },
 486 /* RFC 2485 */
 487         { TAG_OPEN_GROUP_UAP,   "aUAP" },
 488 /* RFC 2563 */
 489         { TAG_DISABLE_AUTOCONF, "BNOAUTO" },
 490 /* RFC 2610 */
 491         { TAG_SLP_DA,           "bSLP-DA" },    /*"b" is a little wrong */
 492         { TAG_SLP_SCOPE,        "bSLP-SCOPE" }, /*"b" is a little wrong */
 493 /* RFC 2937 */
 494         { TAG_NS_SEARCH,        "sNSSEARCH" },  /* XXX 's' */
 495 /* RFC 3004 - The User Class Option for DHCP */
 496         { TAG_USER_CLASS,       "$User-Class" },
 497 /* RFC 3011 */
 498         { TAG_IP4_SUBNET_SELECT, "iSUBNET" },
 499 /* RFC 3442 */
 500         { TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" },
 501         { TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" },
 502 /* RFC 5859 - TFTP Server Address Option for DHCPv4 */
 503         { TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" },
 504 /* https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml#options */
 505         { TAG_SLP_NAMING_AUTH,  "aSLP-NA" },
 506         { TAG_CLIENT_FQDN,      "$FQDN" },
 507         { TAG_AGENT_CIRCUIT,    "$Agent-Information" },
 508         { TAG_AGENT_REMOTE,     "bARMT" },
 509         { TAG_TZ_STRING,        "aTZSTR" },
 510         { TAG_FQDN_OPTION,      "bFQDNS" },     /* XXX 'b' */
 511         { TAG_AUTH,             "bAUTH" },      /* XXX 'b' */
 512         { TAG_CLIENT_LAST_TRANSACTION_TIME, "LLast-Transaction-Time" },
 513         { TAG_ASSOCIATED_IP,    "iAssociated-IP" },
 514         { TAG_CLIENT_ARCH,      "sARCH" },
 515         { TAG_CLIENT_NDI,       "bNDI" },       /* XXX 'b' */
 516         { TAG_CLIENT_GUID,      "bGUID" },      /* XXX 'b' */
 517         { TAG_LDAP_URL,         "aLDAP" },
 518         { TAG_TZ_PCODE,         "aPOSIX-TZ" },
 519         { TAG_TZ_TCODE,         "aTZ-Name" },
 520         { TAG_NETINFO_PARENT,   "iNI" },
 521         { TAG_NETINFO_PARENT_TAG, "aNITAG" },
 522         { TAG_URL,              "aURL" },
 523         { TAG_MUDURL,           "aMUD-URL" },
 524         { 0, NULL }
 525 };
 526
 527 /* DHCP "options overload" types */
 528 static const struct tok oo2str[] = {
 529         { 1,    "file" },
 530         { 2,    "sname" },
 531         { 3,    "file+sname" },
 532         { 0, NULL }
 533 };
 534
 535 /* NETBIOS over TCP/IP node type options */
 536 static const struct tok nbo2str[] = {
 537         { 0x1,  "b-node" },
 538         { 0x2,  "p-node" },
 539         { 0x4,  "m-node" },
 540         { 0x8,  "h-node" },
 541         { 0, NULL }
 542 };
 543
 544 /* ARP Hardware types, for Client-ID option */
 545 static const struct tok arp2str[] = {
 546         { 0x1,  "ether" },
 547         { 0x6,  "ieee802" },
 548         { 0x7,  "arcnet" },
 549         { 0xf,  "frelay" },
 550         { 0x17, "strip" },
 551         { 0x18, "ieee1394" },
 552         { 0, NULL }
 553 };
 554
 555 static const struct tok dhcp_msg_values[] = {
 556         { DHCPDISCOVER,        "Discover" },
 557         { DHCPOFFER,           "Offer" },
 558         { DHCPREQUEST,         "Request" },
 559         { DHCPDECLINE,         "Decline" },
 560         { DHCPACK,             "ACK" },
 561         { DHCPNAK,             "NACK" },
 562         { DHCPRELEASE,         "Release" },
 563         { DHCPINFORM,          "Inform" },
 564         { DHCPLEASEQUERY,      "LeaseQuery" },
 565         { DHCPLEASEUNASSIGNED, "LeaseUnassigned" },
 566         { DHCPLEASEUNKNOWN,    "LeaseUnknown" },
 567         { DHCPLEASEACTIVE,     "LeaseActive" },
 568         { 0, NULL }
 569 };
 570
 571 #define AGENT_SUBOPTION_CIRCUIT_ID      1       /* RFC 3046 */
 572 #define AGENT_SUBOPTION_REMOTE_ID       2       /* RFC 3046 */
 573 #define AGENT_SUBOPTION_SUBSCRIBER_ID   6       /* RFC 3993 */
 574 static const struct tok agent_suboption_values[] = {
 575         { AGENT_SUBOPTION_CIRCUIT_ID,    "Circuit-ID" },
 576         { AGENT_SUBOPTION_REMOTE_ID,     "Remote-ID" },
 577         { AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" },
 578         { 0, NULL }
 579 };
 580
 581
 582 static void
 583 rfc1048_print(netdissect_options *ndo,
 584               const u_char *bp)
 585 {
 586         uint16_t tag;
 587         u_int len;
 588         const char *cp;
 589         char c;
 590         int first, idx;
 591         uint8_t subopt, suboptlen;
 592
 593         ND_PRINT("\n\t  Vendor-rfc1048 Extensions");
 594
 595         /* Step over magic cookie */
 596         ND_PRINT("\n\t    Magic Cookie 0x%08x", GET_BE_U_4(bp));
 597         bp += sizeof(int32_t);
 598
 599         /* Loop while we there is a tag left in the buffer */
 600         while (ND_TTEST_1(bp)) {
 601                 tag = GET_U_1(bp);
 602                 bp++;
 603                 if (tag == TAG_PAD && ndo->ndo_vflag < 3)
 604                         continue;
 605                 if (tag == TAG_END && ndo->ndo_vflag < 3)
 606                         return;
 607                 cp = tok2str(tag2str, "?Unknown", tag);
 608                 c = *cp++;
 609
 610                 if (tag == TAG_PAD || tag == TAG_END)
 611                         len = 0;
 612                 else {
 613                         /* Get the length; check for truncation */
 614                         len = GET_U_1(bp);
 615                         bp++;
 616                 }
 617
 618                 ND_PRINT("\n\t    %s (%u), length %u%s", cp, tag, len,
 619                           len > 0 ? ": " : "");
 620
 621                 if (tag == TAG_PAD && ndo->ndo_vflag > 2) {
 622                         u_int ntag = 1;
 623                         while (ND_TTEST_1(bp) &&
 624                                GET_U_1(bp) == TAG_PAD) {
 625                                 bp++;
 626                                 ntag++;
 627                         }
 628                         if (ntag > 1)
 629                                 ND_PRINT(", occurs %u", ntag);
 630                 }
 631
 632                 ND_TCHECK_LEN(bp, len);
 633
 634                 if (tag == TAG_DHCP_MESSAGE && len == 1) {
 635                         ND_PRINT("%s",
 636                                  tok2str(dhcp_msg_values, "Unknown (%u)", GET_U_1(bp)));
 637                         bp++;
 638                         continue;
 639                 }
 640
 641                 if (tag == TAG_PARM_REQUEST) {
 642                         idx = 0;
 643                         while (len > 0) {
 644                                 uint8_t innertag = GET_U_1(bp);
 645                                 bp++;
 646                                 len--;
 647                                 cp = tok2str(tag2str, "?Unknown", innertag);
 648                                 if (idx % 4 == 0)
 649                                         ND_PRINT("\n\t      ");
 650                                 else
 651                                         ND_PRINT(", ");
 652                                 ND_PRINT("%s (%u)", cp + 1, innertag);
 653                                 idx++;
 654                         }
 655                         continue;
 656                 }
 657
 658                 /* Print data */
 659                 if (c == '?') {
 660                         /* Base default formats for unknown tags on data size */
 661                         if (len & 1)
 662                                 c = 'b';
 663                         else if (len & 2)
 664                                 c = 's';
 665                         else
 666                                 c = 'l';
 667                 }
 668                 first = 1;
 669                 switch (c) {
 670
 671                 case 'a':
 672                         /* ASCII strings */
 673                         ND_PRINT("\"");
 674                         if (nd_printn(ndo, bp, len, ndo->ndo_snapend)) {
 675                                 ND_PRINT("\"");
 676                                 goto trunc;
 677                         }
 678                         ND_PRINT("\"");
 679                         bp += len;
 680                         len = 0;
 681                         break;
 682
 683                 case 'i':
 684                 case 'l':
 685                 case 'L':
 686                         /* ip addresses/32-bit words */
 687                         while (len >= 4) {
 688                                 if (!first)
 689                                         ND_PRINT(",");
 690                                 if (c == 'i')
 691                                         ND_PRINT("%s", GET_IPADDR_STRING(bp));
 692                                 else if (c == 'L')
 693                                         ND_PRINT("%d", GET_BE_S_4(bp));
 694                                 else
 695                                         ND_PRINT("%u", GET_BE_U_4(bp));
 696                                 bp += 4;
 697                                 len -= 4;
 698                                 first = 0;
 699                         }
 700                         break;
 701
 702                 case 'p':
 703                         /* IP address pairs */
 704                         while (len >= 2*4) {
 705                                 if (!first)
 706                                         ND_PRINT(",");
 707                                 ND_PRINT("(%s:", GET_IPADDR_STRING(bp));
 708                                 bp += 4;
 709                                 len -= 4;
 710                                 ND_PRINT("%s)", GET_IPADDR_STRING(bp));
 711                                 bp += 4;
 712                                 len -= 4;
 713                                 first = 0;
 714                         }
 715                         break;
 716
 717                 case 's':
 718                         /* shorts */
 719                         while (len >= 2) {
 720                                 if (!first)
 721                                         ND_PRINT(",");
 722                                 ND_PRINT("%u", GET_BE_U_2(bp));
 723                                 bp += 2;
 724                                 len -= 2;
 725                                 first = 0;
 726                         }
 727                         break;
 728
 729                 case 'B':
 730                         /* boolean */
 731                         while (len > 0) {
 732                                 uint8_t bool_value;
 733                                 if (!first)
 734                                         ND_PRINT(",");
 735                                 bool_value = GET_U_1(bp);
 736                                 switch (bool_value) {
 737                                 case 0:
 738                                         ND_PRINT("N");
 739                                         break;
 740                                 case 1:
 741                                         ND_PRINT("Y");
 742                                         break;
 743                                 default:
 744                                         ND_PRINT("%u?", bool_value);
 745                                         break;
 746                                 }
 747                                 ++bp;
 748                                 --len;
 749                                 first = 0;
 750                         }
 751                         break;
 752
 753                 case 'b':
 754                 case 'x':
 755                 default:
 756                         /* Bytes */
 757                         while (len > 0) {
 758                                 uint8_t byte_value;
 759                                 if (!first)
 760                                         ND_PRINT(c == 'x' ? ":" : ".");
 761                                 byte_value = GET_U_1(bp);
 762                                 if (c == 'x')
 763                                         ND_PRINT("%02x", byte_value);
 764                                 else
 765                                         ND_PRINT("%u", byte_value);
 766                                 ++bp;
 767                                 --len;
 768                                 first = 0;
 769                         }
 770                         break;
 771
 772                 case '$':
 773                         /* Guys we can't handle with one of the usual cases */
 774                         switch (tag) {
 775
 776                         case TAG_NETBIOS_NODE:
 777                                 /* this option should be at least 1 byte long */
 778                                 if (len < 1) {
 779                                         ND_PRINT("[ERROR: length < 1 bytes]");
 780                                         break;
 781                                 }
 782                                 tag = GET_U_1(bp);
 783                                 ++bp;
 784                                 --len;
 785                                 ND_PRINT("%s", tok2str(nbo2str, NULL, tag));
 786                                 break;
 787
 788                         case TAG_OPT_OVERLOAD:
 789                                 /* this option should be at least 1 byte long */
 790                                 if (len < 1) {
 791                                         ND_PRINT("[ERROR: length < 1 bytes]");
 792                                         break;
 793                                 }
 794                                 tag = GET_U_1(bp);
 795                                 ++bp;
 796                                 --len;
 797                                 ND_PRINT("%s", tok2str(oo2str, NULL, tag));
 798                                 break;
 799
 800                         case TAG_CLIENT_FQDN:
 801                                 /* this option should be at least 3 bytes long */
 802                                 if (len < 3) {
 803                                         ND_PRINT("[ERROR: length < 3 bytes]");
 804                                         bp += len;
 805                                         len = 0;
 806                                         break;
 807                                 }
 808                                 if (GET_U_1(bp) & 0xf0) {
 809                                         ND_PRINT("[ERROR: MBZ nibble 0x%x != 0] ",
 810                                                  (GET_U_1(bp) & 0xf0) >> 4);
 811                                 }
 812                                 if (GET_U_1(bp) & 0x0f)
 813                                         ND_PRINT("[%s] ",
 814                                                  client_fqdn_flags(GET_U_1(bp)));
 815                                 bp++;
 816                                 if (GET_U_1(bp) || GET_U_1(bp + 1))
 817                                         ND_PRINT("%u/%u ", GET_U_1(bp),
 818                                                  GET_U_1(bp + 1));
 819                                 bp += 2;
 820                                 ND_PRINT("\"");
 821                                 if (nd_printn(ndo, bp, len - 3, ndo->ndo_snapend)) {
 822                                         ND_PRINT("\"");
 823                                         goto trunc;
 824                                 }
 825                                 ND_PRINT("\"");
 826                                 bp += len - 3;
 827                                 len = 0;
 828                                 break;
 829
 830                         case TAG_CLIENT_ID:
 831                             {
 832                                 int type;
 833
 834                                 /* this option should be at least 1 byte long */
 835                                 if (len < 1) {
 836                                         ND_PRINT("[ERROR: length < 1 bytes]");
 837                                         break;
 838                                 }
 839                                 type = GET_U_1(bp);
 840                                 bp++;
 841                                 len--;
 842                                 if (type == 0) {
 843                                         ND_PRINT("\"");
 844                                         if (nd_printn(ndo, bp, len, ndo->ndo_snapend)) {
 845                                                 ND_PRINT("\"");
 846                                                 goto trunc;
 847                                         }
 848                                         ND_PRINT("\"");
 849                                         bp += len;
 850                                         len = 0;
 851                                         break;
 852                                 } else {
 853                                         ND_PRINT("%s ", tok2str(arp2str, "hardware-type %u,", type));
 854                                         while (len > 0) {
 855                                                 if (!first)
 856                                                         ND_PRINT(":");
 857                                                 ND_PRINT("%02x", GET_U_1(bp));
 858                                                 ++bp;
 859                                                 --len;
 860                                                 first = 0;
 861                                         }
 862                                 }
 863                                 break;
 864                             }
 865
 866                         case TAG_AGENT_CIRCUIT:
 867                                 while (len >= 2) {
 868                                         subopt = GET_U_1(bp);
 869                                         suboptlen = GET_U_1(bp + 1);
 870                                         bp += 2;
 871                                         len -= 2;
 872                                         if (suboptlen > len) {
 873                                                 ND_PRINT("\n\t      %s SubOption %u, length %u: length goes past end of option",
 874                                                           tok2str(agent_suboption_values, "Unknown", subopt),
 875                                                           subopt,
 876                                                           suboptlen);
 877                                                 bp += len;
 878                                                 len = 0;
 879                                                 break;
 880                                         }
 881                                         ND_PRINT("\n\t      %s SubOption %u, length %u: ",
 882                                                   tok2str(agent_suboption_values, "Unknown", subopt),
 883                                                   subopt,
 884                                                   suboptlen);
 885                                         switch (subopt) {
 886
 887                                         case AGENT_SUBOPTION_CIRCUIT_ID: /* fall through */
 888                                         case AGENT_SUBOPTION_REMOTE_ID:
 889                                         case AGENT_SUBOPTION_SUBSCRIBER_ID:
 890                                                 if (nd_printn(ndo, bp, suboptlen, ndo->ndo_snapend))
 891                                                         goto trunc;
 892                                                 break;
 893
 894                                         default:
 895                                                 print_unknown_data(ndo, bp, "\n\t\t", suboptlen);
 896                                         }
 897
 898                                         len -= suboptlen;
 899                                         bp += suboptlen;
 900                                 }
 901                                 break;
 902
 903                         case TAG_CLASSLESS_STATIC_RT:
 904                         case TAG_CLASSLESS_STA_RT_MS:
 905                             {
 906                                 u_int mask_width, significant_octets, i;
 907
 908                                 /* this option should be at least 5 bytes long */
 909                                 if (len < 5) {
 910                                         ND_PRINT("[ERROR: length < 5 bytes]");
 911                                         bp += len;
 912                                         len = 0;
 913                                         break;
 914                                 }
 915                                 while (len > 0) {
 916                                         if (!first)
 917                                                 ND_PRINT(",");
 918                                         mask_width = GET_U_1(bp);
 919                                         bp++;
 920                                         len--;
 921                                         /* mask_width <= 32 */
 922                                         if (mask_width > 32) {
 923                                                 ND_PRINT("[ERROR: Mask width (%u) > 32]", mask_width);
 924                                                 bp += len;
 925                                                 len = 0;
 926                                                 break;
 927                                         }
 928                                         significant_octets = (mask_width + 7) / 8;
 929                                         /* significant octets + router(4) */
 930                                         if (len < significant_octets + 4) {
 931                                                 ND_PRINT("[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4);
 932                                                 bp += len;
 933                                                 len = 0;
 934                                                 break;
 935                                         }
 936                                         ND_PRINT("(");
 937                                         if (mask_width == 0)
 938                                                 ND_PRINT("default");
 939                                         else {
 940                                                 for (i = 0; i < significant_octets ; i++) {
 941                                                         if (i > 0)
 942                                                                 ND_PRINT(".");
 943                                                         ND_PRINT("%u",
 944                                                                  GET_U_1(bp));
 945                                                         bp++;
 946                                                 }
 947                                                 for (i = significant_octets ; i < 4 ; i++)
 948                                                         ND_PRINT(".0");
 949                                                 ND_PRINT("/%u", mask_width);
 950                                         }
 951                                         ND_PRINT(":%s)", GET_IPADDR_STRING(bp));
 952                                         bp += 4;
 953                                         len -= (significant_octets + 4);
 954                                         first = 0;
 955                                 }
 956                                 break;
 957                             }
 958
 959                         case TAG_USER_CLASS:
 960                             {
 961                                 u_int suboptnumber = 1;
 962
 963                                 first = 1;
 964                                 if (len < 2) {
 965                                         ND_PRINT("[ERROR: length < 2 bytes]");
 966                                         bp += len;
 967                                         len = 0;
 968                                         break;
 969                                 }
 970                                 while (len > 0) {
 971                                         suboptlen = GET_U_1(bp);
 972                                         bp++;
 973                                         len--;
 974                                         ND_PRINT("\n\t      ");
 975                                         ND_PRINT("instance#%u: ", suboptnumber);
 976                                         if (suboptlen == 0) {
 977                                                 ND_PRINT("[ERROR: suboption length must be non-zero]");
 978                                                 bp += len;
 979                                                 len = 0;
 980                                                 break;
 981                                         }
 982                                         if (len < suboptlen) {
 983                                                 ND_PRINT("[ERROR: invalid option]");
 984                                                 bp += len;
 985                                                 len = 0;
 986                                                 break;
 987                                         }
 988                                         ND_PRINT("\"");
 989                                         if (nd_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) {
 990                                                 ND_PRINT("\"");
 991                                                 goto trunc;
 992                                         }
 993                                         ND_PRINT("\"");
 994                                         ND_PRINT(", length %u", suboptlen);
 995                                         suboptnumber++;
 996                                         len -= suboptlen;
 997                                         bp += suboptlen;
 998                                 }
 999                                 break;
1000                             }
1001
1002                         default:
1003                                 ND_PRINT("[unknown special tag %u, size %u]",
1004                                           tag, len);
1005                                 bp += len;
1006                                 len = 0;
1007                                 break;
1008                         }
1009                         break;
1010                 }
1011                 /* Data left over? */
1012                 if (len) {
1013                         ND_PRINT("\n\t  trailing data length %u", len);
1014                         bp += len;
1015                 }
1016         }
1017         return;
1018 trunc:
1019         nd_print_trunc(ndo);
1020 }
1021
1022 #define PRINTCMUADDR(m, s) { ND_TCHECK_4(cmu->m); \
1023     if (GET_IPV4_TO_NETWORK_ORDER(cmu->m) != 0) \
1024         ND_PRINT(" %s:%s", s, GET_IPADDR_STRING(cmu->m)); }
1025
1026 static void
1027 cmu_print(netdissect_options *ndo,
1028           const u_char *bp)
1029 {
1030         const struct cmu_vend *cmu;
1031         uint8_t v_flags;
1032
1033         ND_PRINT(" vend-cmu");
1034         cmu = (const struct cmu_vend *)bp;
1035
1036         /* Only print if there are unknown bits */
1037         ND_TCHECK_4(cmu->v_flags);
1038         v_flags = GET_U_1(cmu->v_flags);
1039         if ((v_flags & ~(VF_SMASK)) != 0)
1040                 ND_PRINT(" F:0x%x", v_flags);
1041         PRINTCMUADDR(v_dgate, "DG");
1042         PRINTCMUADDR(v_smask, v_flags & VF_SMASK ? "SM" : "SM*");
1043         PRINTCMUADDR(v_dns1, "NS1");
1044         PRINTCMUADDR(v_dns2, "NS2");
1045         PRINTCMUADDR(v_ins1, "IEN1");
1046         PRINTCMUADDR(v_ins2, "IEN2");
1047         PRINTCMUADDR(v_ts1, "TS1");
1048         PRINTCMUADDR(v_ts2, "TS2");
1049         return;
1050
1051 trunc:
1052         nd_print_trunc(ndo);
1053 }
1054
1055 #undef PRINTCMUADDR
1056
1057 static char *
1058 client_fqdn_flags(u_int flags)
1059 {
1060         static char buf[8+1];
1061         int i = 0;
1062
1063         if (flags & CLIENT_FQDN_FLAGS_S)
1064                 buf[i++] = 'S';
1065         if (flags & CLIENT_FQDN_FLAGS_O)
1066                 buf[i++] = 'O';
1067         if (flags & CLIENT_FQDN_FLAGS_E)
1068                 buf[i++] = 'E';
1069         if (flags & CLIENT_FQDN_FLAGS_N)
1070                 buf[i++] = 'N';
1071         buf[i] = '\0';
1072
1073         return buf;
1074 }