2 * Routines for NetBIOS-over-TCP packet disassembly (the name dates back
3 * to when it had only NBNS)
4 * Guy Harris <guy@alum.mit.edu>
6 * $Id: packet-nbns.c,v 1.67 2001/12/10 00:25:30 guy Exp $
8 * Ethereal - Network traffic analyzer
9 * By Gerald Combs <gerald@ethereal.com>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
31 #ifdef HAVE_SYS_TYPES_H
32 # include <sys/types.h>
40 #include "packet-dns.h"
41 #include "packet-netbios.h"
42 #include "packet-tcp.h"
45 static int proto_nbns = -1;
46 static int hf_nbns_response = -1;
47 static int hf_nbns_query = -1;
48 static int hf_nbns_transaction_id = -1;
49 static int hf_nbns_count_questions = -1;
50 static int hf_nbns_count_answers = -1;
51 static int hf_nbns_count_auth_rr = -1;
52 static int hf_nbns_count_add_rr = -1;
54 static gint ett_nbns = -1;
55 static gint ett_nbns_qd = -1;
56 static gint ett_nbns_flags = -1;
57 static gint ett_nbns_nb_flags = -1;
58 static gint ett_nbns_name_flags = -1;
59 static gint ett_nbns_rr = -1;
60 static gint ett_nbns_qry = -1;
61 static gint ett_nbns_ans = -1;
63 static int proto_nbdgm = -1;
64 static int hf_nbdgm_type = -1;
65 static int hf_nbdgm_fragment = -1;
66 static int hf_nbdgm_first = -1;
67 static int hf_nbdgm_node_type = -1;
68 static int hf_nbdgm_datagram_id = -1;
69 static int hf_nbdgm_src_ip = -1;
70 static int hf_nbdgm_src_port = -1;
72 static gint ett_nbdgm = -1;
74 static int proto_nbss = -1;
75 static int hf_nbss_type = -1;
76 static int hf_nbss_flags = -1;
78 static gint ett_nbss = -1;
79 static gint ett_nbss_flags = -1;
81 /* desegmentation of NBSS over TCP */
82 static gboolean nbss_desegment = TRUE;
84 /* See RFC 1001 and 1002 for information on the first three, and see
86 http://www.cifs.com/specs/draft-leach-cifs-v1-spec-01.txt
88 Appendix B, and various messages on the CIFS mailing list such as
90 http://discuss.microsoft.com/SCRIPTS/WA-MSD.EXE?A2=ind9811A&L=cifs&P=R386
92 for information on the fourth. */
93 #define UDP_PORT_NBNS 137
94 #define UDP_PORT_NBDGM 138
95 #define TCP_PORT_NBSS 139
96 #define TCP_PORT_CIFS 445
98 /* Packet structure taken from RFC 1002. See also RFC 1001.
99 * Opcode, flags, and rcode treated as "flags", similarly to DNS,
100 * to make it easier to lift the dissection code from "packet-dns.c". */
102 /* Offsets of fields in the NBNS header. */
110 /* Length of NBNS header. */
111 #define NBNS_HDRLEN 12
114 #define T_NB 32 /* NetBIOS name service RR */
115 #define T_NBSTAT 33 /* NetBIOS node status RR */
117 /* Bit fields in the flags */
118 #define F_RESPONSE (1<<15) /* packet is response */
119 #define F_OPCODE (0xF<<11) /* query opcode */
120 #define F_AUTHORITATIVE (1<<10) /* response is authoritative */
121 #define F_TRUNCATED (1<<9) /* response is truncated */
122 #define F_RECDESIRED (1<<8) /* recursion desired */
123 #define F_RECAVAIL (1<<7) /* recursion available */
124 #define F_BROADCAST (1<<4) /* broadcast/multicast packet */
125 #define F_RCODE (0xF<<0) /* reply code */
128 #define OPCODE_QUERY (0<<11) /* standard query */
129 #define OPCODE_REGISTRATION (5<<11) /* registration */
130 #define OPCODE_RELEASE (6<<11) /* release name */
131 #define OPCODE_WACK (7<<11) /* wait for acknowledgement */
132 #define OPCODE_REFRESH (8<<11) /* refresh registration */
133 #define OPCODE_REFRESHALT (9<<11) /* refresh registration (alternate opcode) */
134 #define OPCODE_MHREGISTRATION (15<<11) /* multi-homed registration */
137 #define RCODE_NOERROR (0<<0)
138 #define RCODE_FMTERROR (1<<0)
139 #define RCODE_SERVFAIL (2<<0)
140 #define RCODE_NAMEERROR (3<<0)
141 #define RCODE_NOTIMPL (4<<0)
142 #define RCODE_REFUSED (5<<0)
143 #define RCODE_ACTIVE (6<<0)
144 #define RCODE_CONFLICT (7<<0)
146 /* Values for the "NB_FLAGS" field of RR data. From RFC 1001 and 1002,
147 * except for NB_FLAGS_ONT_H_NODE, which was discovered by looking at
149 #define NB_FLAGS_ONT (3<<(15-2)) /* bits for node type */
150 #define NB_FLAGS_ONT_B_NODE (0<<(15-2)) /* B-mode node */
151 #define NB_FLAGS_ONT_P_NODE (1<<(15-2)) /* P-mode node */
152 #define NB_FLAGS_ONT_M_NODE (2<<(15-2)) /* M-mode node */
153 #define NB_FLAGS_ONT_H_NODE (3<<(15-2)) /* H-mode node */
155 #define NB_FLAGS_G (1<<(15-0)) /* group name */
157 /* Values for the "NAME_FLAGS" field of a NODE_NAME entry in T_NBSTAT
158 * RR data. From RFC 1001 and 1002, except for NAME_FLAGS_ONT_H_NODE,
159 * which was discovered by looking at packet traces. */
160 #define NAME_FLAGS_PRM (1<<(15-6)) /* name is permanent node name */
162 #define NAME_FLAGS_ACT (1<<(15-5)) /* name is active */
164 #define NAME_FLAGS_CNF (1<<(15-4)) /* name is in conflict */
166 #define NAME_FLAGS_DRG (1<<(15-3)) /* name is being deregistered */
168 #define NAME_FLAGS_ONT (3<<(15-2)) /* bits for node type */
169 #define NAME_FLAGS_ONT_B_NODE (0<<(15-2)) /* B-mode node */
170 #define NAME_FLAGS_ONT_P_NODE (1<<(15-2)) /* P-mode node */
171 #define NAME_FLAGS_ONT_M_NODE (2<<(15-2)) /* M-mode node */
173 #define NAME_FLAGS_G (1<<(15-0)) /* group name */
175 static const value_string opcode_vals[] = {
176 { OPCODE_QUERY, "Name query" },
177 { OPCODE_REGISTRATION, "Registration" },
178 { OPCODE_RELEASE, "Release" },
179 { OPCODE_WACK, "Wait for acknowledgment" },
180 { OPCODE_REFRESH, "Refresh" },
181 { OPCODE_REFRESHALT, "Refresh (alternate opcode)" },
182 { OPCODE_MHREGISTRATION, "Multi-homed registration" },
187 nbns_type_name (int type)
199 #define NBNAME_BUF_LEN 128
202 get_nbns_name(tvbuff_t *tvb, int offset, int nbns_data_offset,
203 char *name_ret, int *name_type_ret)
207 char nbname[NBNAME_BUF_LEN];
208 char *pname, *pnbname, cname, cnbname;
211 name_len = get_dns_name(tvb, offset, nbns_data_offset, name,
214 /* OK, now undo the first-level encoding. */
216 pnbname = &nbname[0];
218 /* Every two characters of the first level-encoded name
219 * turn into one character in the decoded name. */
222 break; /* no more characters */
224 break; /* scope ID follows */
225 if (cname < 'A' || cname > 'Z') {
228 "Illegal NetBIOS name (character not between A and Z in first-level encoding)");
232 cnbname = cname << 4;
236 if (cname == '\0' || cname == '.') {
237 /* No more characters in the name - but we're in
238 * the middle of a pair. Not legal. */
240 "Illegal NetBIOS name (odd number of bytes)");
243 if (cname < 'A' || cname > 'Z') {
246 "Illegal NetBIOS name (character not between A and Z in first-level encoding)");
253 /* Do we have room to store the character? */
254 if (pnbname < &nbname[NETBIOS_NAME_LEN]) {
255 /* Yes - store the character. */
259 /* We bump the pointer even if it's past the end of the
260 name, so we keep track of how long the name is. */
264 /* NetBIOS names are supposed to be exactly 16 bytes long. */
265 if (pnbname - nbname != NETBIOS_NAME_LEN) {
267 sprintf(nbname, "Illegal NetBIOS name (%ld bytes long)",
268 (long)(pnbname - nbname));
272 /* This one is; make its name printable. */
273 name_type = process_netbios_name(nbname, name_ret);
274 name_ret += strlen(name_ret);
275 sprintf(name_ret, "<%02x>", name_type);
278 /* We have a scope ID, starting at "pname"; append that to
279 * the decoded host name. */
280 strcpy(name_ret, pname);
282 if (name_type_ret != NULL)
283 *name_type_ret = name_type;
287 if (name_type_ret != NULL)
289 strcpy (name_ret, nbname);
295 get_nbns_name_type_class(tvbuff_t *tvb, int offset, int nbns_data_offset,
296 char *name_ret, int *name_len_ret, int *name_type_ret, int *type_ret,
303 name_len = get_nbns_name(tvb, offset, nbns_data_offset, name_ret,
307 type = tvb_get_ntohs(tvb, offset);
310 class = tvb_get_ntohs(tvb, offset);
314 *name_len_ret = name_len;
320 add_name_and_type(proto_tree *tree, tvbuff_t *tvb, int offset, int len,
321 char *tag, char *name, int name_type)
323 if (name_type != -1) {
324 proto_tree_add_text(tree, tvb, offset, len, "%s: %s (%s)",
325 tag, name, netbios_name_type_descr(name_type));
327 proto_tree_add_text(tree, tvb, offset, len, "%s: %s",
333 dissect_nbns_query(tvbuff_t *tvb, int offset, int nbns_data_offset,
334 column_info *cinfo, proto_tree *nbns_tree)
337 char name[(NETBIOS_NAME_LEN - 1)*4 + MAXDNAME];
349 data_start = data_offset = offset;
351 len = get_nbns_name_type_class(tvb, offset, nbns_data_offset, name,
352 &name_len, &name_type, &type, &class);
355 type_name = nbns_type_name(type);
356 class_name = dns_class_name(class);
359 col_append_fstr(cinfo, COL_INFO, " %s %s", type_name, name);
360 if (nbns_tree != NULL) {
361 tq = proto_tree_add_text(nbns_tree, tvb, offset, len,
362 "%s: type %s, class %s", name, type_name, class_name);
363 q_tree = proto_item_add_subtree(tq, ett_nbns_qd);
365 add_name_and_type(q_tree, tvb, offset, name_len, "Name", name,
369 proto_tree_add_text(q_tree, tvb, offset, 2, "Type: %s", type_name);
372 proto_tree_add_text(q_tree, tvb, offset, 2, "Class: %s", class_name);
376 return data_offset - data_start;
380 nbns_add_nbns_flags(proto_tree *nbns_tree, tvbuff_t *tvb, int offset,
381 u_short flags, int is_wack)
384 proto_tree *field_tree;
386 static const value_string rcode_vals[] = {
387 { RCODE_NOERROR, "No error" },
388 { RCODE_FMTERROR, "Request was invalidly formatted" },
389 { RCODE_SERVFAIL, "Server failure" },
390 { RCODE_NAMEERROR, "Requested name does not exist" },
391 { RCODE_NOTIMPL, "Request is not implemented" },
392 { RCODE_REFUSED, "Request was refused" },
393 { RCODE_ACTIVE, "Name is owned by another node" },
394 { RCODE_CONFLICT, "Name is in conflict" },
398 strcpy(buf, val_to_str(flags & F_OPCODE, opcode_vals,
399 "Unknown operation"));
400 if (flags & F_RESPONSE && !is_wack) {
401 strcat(buf, " response");
403 strcat(buf, val_to_str(flags & F_RCODE, rcode_vals,
406 tf = proto_tree_add_text(nbns_tree, tvb, offset, 2,
407 "Flags: 0x%04x (%s)", flags, buf);
408 field_tree = proto_item_add_subtree(tf, ett_nbns_flags);
409 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
410 decode_boolean_bitfield(flags, F_RESPONSE,
411 2*8, "Response", "Query"));
412 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
413 decode_enumerated_bitfield(flags, F_OPCODE,
414 2*8, opcode_vals, "%s"));
415 if (flags & F_RESPONSE) {
416 proto_tree_add_text(field_tree, tvb, offset, 2,
418 decode_boolean_bitfield(flags, F_AUTHORITATIVE,
420 "Server is an authority for domain",
421 "Server isn't an authority for domain"));
423 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
424 decode_boolean_bitfield(flags, F_TRUNCATED,
426 "Message is truncated",
427 "Message is not truncated"));
428 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
429 decode_boolean_bitfield(flags, F_RECDESIRED,
431 "Do query recursively",
432 "Don't do query recursively"));
433 if (flags & F_RESPONSE) {
434 proto_tree_add_text(field_tree, tvb, offset, 2,
436 decode_boolean_bitfield(flags, F_RECAVAIL,
438 "Server can do recursive queries",
439 "Server can't do recursive queries"));
441 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
442 decode_boolean_bitfield(flags, F_BROADCAST,
445 "Not a broadcast packet"));
446 if (flags & F_RESPONSE && !is_wack) {
447 proto_tree_add_text(field_tree, tvb, offset, 2,
449 decode_enumerated_bitfield(flags, F_RCODE,
456 nbns_add_nb_flags(proto_tree *rr_tree, tvbuff_t *tvb, int offset, u_short flags)
459 proto_tree *field_tree;
461 static const value_string nb_flags_ont_vals[] = {
462 { NB_FLAGS_ONT_B_NODE, "B-node" },
463 { NB_FLAGS_ONT_P_NODE, "P-node" },
464 { NB_FLAGS_ONT_M_NODE, "M-node" },
465 { NB_FLAGS_ONT_H_NODE, "H-node" },
469 strcpy(buf, val_to_str(flags & NB_FLAGS_ONT, nb_flags_ont_vals,
472 if (flags & NB_FLAGS_G)
473 strcat(buf, "group");
475 strcat(buf, "unique");
476 tf = proto_tree_add_text(rr_tree, tvb, offset, 2, "Flags: 0x%x (%s)", flags,
478 field_tree = proto_item_add_subtree(tf, ett_nbns_nb_flags);
479 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
480 decode_boolean_bitfield(flags, NB_FLAGS_G,
484 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
485 decode_enumerated_bitfield(flags, NB_FLAGS_ONT,
486 2*8, nb_flags_ont_vals, "%s"));
490 nbns_add_name_flags(proto_tree *rr_tree, tvbuff_t *tvb, int offset,
494 proto_item *field_tree;
496 static const value_string name_flags_ont_vals[] = {
497 { NAME_FLAGS_ONT_B_NODE, "B-node" },
498 { NAME_FLAGS_ONT_P_NODE, "P-node" },
499 { NAME_FLAGS_ONT_M_NODE, "M-node" },
503 strcpy(buf, val_to_str(flags & NAME_FLAGS_ONT, name_flags_ont_vals,
506 if (flags & NAME_FLAGS_G)
507 strcat(buf, "group");
509 strcat(buf, "unique");
510 if (flags & NAME_FLAGS_DRG)
511 strcat(buf, ", being deregistered");
512 if (flags & NAME_FLAGS_CNF)
513 strcat(buf, ", in conflict");
514 if (flags & NAME_FLAGS_ACT)
515 strcat(buf, ", active");
516 if (flags & NAME_FLAGS_PRM)
517 strcat(buf, ", permanent node name");
518 tf = proto_tree_add_text(rr_tree, tvb, offset, 2, "Name flags: 0x%x (%s)",
520 field_tree = proto_item_add_subtree(tf, ett_nbns_name_flags);
521 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
522 decode_boolean_bitfield(flags, NAME_FLAGS_G,
526 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
527 decode_enumerated_bitfield(flags, NAME_FLAGS_ONT,
528 2*8, name_flags_ont_vals, "%s"));
529 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
530 decode_boolean_bitfield(flags, NAME_FLAGS_DRG,
532 "Name is being deregistered",
533 "Name is not being deregistered"));
534 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
535 decode_boolean_bitfield(flags, NAME_FLAGS_CNF,
537 "Name is in conflict",
538 "Name is not in conflict"));
539 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
540 decode_boolean_bitfield(flags, NAME_FLAGS_ACT,
543 "Name is not active"));
544 proto_tree_add_text(field_tree, tvb, offset, 2, "%s",
545 decode_boolean_bitfield(flags, NAME_FLAGS_PRM,
547 "Permanent node name",
548 "Not permanent node name"));
552 dissect_nbns_answer(tvbuff_t *tvb, int offset, int nbns_data_offset,
553 column_info *cinfo, proto_tree *nbns_tree, int opcode)
556 char name[(NETBIOS_NAME_LEN - 1)*4 + MAXDNAME + 64];
571 char name_str[(NETBIOS_NAME_LEN - 1)*4 + 1];
573 char nbname[16+4+1]; /* 4 for [<last char>] */
576 data_start = data_offset = offset;
579 len = get_nbns_name_type_class(tvb, offset, nbns_data_offset, name,
580 &name_len, &name_type, &type, &class);
584 type_name = nbns_type_name(type);
585 class_name = dns_class_name(class);
587 ttl = tvb_get_ntohl(tvb, data_offset);
591 data_len = tvb_get_ntohs(tvb, data_offset);
596 case T_NB: /* "NB" record */
598 if (opcode != OPCODE_WACK) {
599 col_append_fstr(cinfo, COL_INFO, " %s %s",
601 ip_to_str(tvb_get_ptr(tvb, data_offset+2, 4)));
604 if (nbns_tree == NULL)
606 trr = proto_tree_add_text(nbns_tree, tvb, offset,
607 (data_offset - data_start) + data_len,
608 "%s: type %s, class %s",
609 name, type_name, class_name);
611 strcat(name, netbios_name_type_descr(name_type));
613 rr_tree = add_rr_to_tree(trr, ett_nbns_rr, tvb, offset, name,
614 name_len, type_name, class_name, ttl, data_len);
615 while (data_len > 0) {
616 if (opcode == OPCODE_WACK) {
617 /* WACK response. This doesn't contain the
618 * same type of RR data as other T_NB
621 proto_tree_add_text(rr_tree, tvb, cur_offset,
622 data_len, "(incomplete entry)");
625 flags = tvb_get_ntohs(tvb, cur_offset);
626 nbns_add_nbns_flags(rr_tree, tvb, cur_offset,
632 proto_tree_add_text(rr_tree, tvb, cur_offset,
633 data_len, "(incomplete entry)");
636 flags = tvb_get_ntohs(tvb, cur_offset);
637 nbns_add_nb_flags(rr_tree, tvb, cur_offset,
643 proto_tree_add_text(rr_tree, tvb, cur_offset,
644 data_len, "(incomplete entry)");
647 proto_tree_add_text(rr_tree, tvb, cur_offset, 4,
649 ip_to_str(tvb_get_ptr(tvb, cur_offset, 4)));
656 case T_NBSTAT: /* "NBSTAT" record */
658 col_append_fstr(cinfo, COL_INFO, " %s", type_name);
659 if (nbns_tree == NULL)
661 trr = proto_tree_add_text(nbns_tree, tvb, offset,
662 (data_offset - data_start) + data_len,
663 "%s: type %s, class %s",
664 name, type_name, class_name);
665 rr_tree = add_rr_to_tree(trr, ett_nbns_rr, tvb, offset, name,
666 name_len, type_name, class_name, ttl, data_len);
668 proto_tree_add_text(rr_tree, tvb, cur_offset,
669 data_len, "(incomplete entry)");
672 num_names = tvb_get_guint8(tvb, cur_offset);
673 proto_tree_add_text(rr_tree, tvb, cur_offset, 1,
674 "Number of names: %u", num_names);
677 while (num_names != 0) {
678 if (data_len < NETBIOS_NAME_LEN) {
679 proto_tree_add_text(rr_tree, tvb, cur_offset,
680 data_len, "(incomplete entry)");
683 tvb_memcpy(tvb, (guint8 *)nbname, cur_offset,
685 name_type = process_netbios_name(nbname,
687 proto_tree_add_text(rr_tree, tvb, cur_offset,
688 NETBIOS_NAME_LEN, "Name: %s<%02x> (%s)",
690 netbios_name_type_descr(name_type));
691 cur_offset += NETBIOS_NAME_LEN;
692 data_len -= NETBIOS_NAME_LEN;
695 proto_tree_add_text(rr_tree, tvb, cur_offset,
696 data_len, "(incomplete entry)");
699 name_flags = tvb_get_ntohs(tvb, cur_offset);
700 nbns_add_name_flags(rr_tree, tvb, cur_offset,
709 proto_tree_add_text(rr_tree, tvb, cur_offset,
710 data_len, "(incomplete entry)");
713 proto_tree_add_text(rr_tree, tvb, cur_offset, 6,
715 ether_to_str(tvb_get_ptr(tvb, cur_offset, 6)));
720 proto_tree_add_text(rr_tree, tvb, cur_offset,
721 data_len, "(incomplete entry)");
724 proto_tree_add_text(rr_tree, tvb, cur_offset, 1,
725 "Jumpers: 0x%x", tvb_get_guint8(tvb, cur_offset));
730 proto_tree_add_text(rr_tree, tvb, cur_offset,
731 data_len, "(incomplete entry)");
734 proto_tree_add_text(rr_tree, tvb, cur_offset, 1,
735 "Test result: 0x%x", tvb_get_guint8(tvb, cur_offset));
740 proto_tree_add_text(rr_tree, tvb, cur_offset,
741 data_len, "(incomplete entry)");
744 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
745 "Version number: 0x%x", tvb_get_ntohs(tvb, cur_offset));
750 proto_tree_add_text(rr_tree, tvb, cur_offset,
751 data_len, "(incomplete entry)");
754 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
755 "Period of statistics: 0x%x",
756 tvb_get_ntohs(tvb, cur_offset));
761 proto_tree_add_text(rr_tree, tvb, cur_offset,
762 data_len, "(incomplete entry)");
765 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
766 "Number of CRCs: %u", tvb_get_ntohs(tvb, cur_offset));
771 proto_tree_add_text(rr_tree, tvb, cur_offset,
772 data_len, "(incomplete entry)");
775 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
776 "Number of alignment errors: %u",
777 tvb_get_ntohs(tvb, cur_offset));
782 proto_tree_add_text(rr_tree, tvb, cur_offset,
783 data_len, "(incomplete entry)");
786 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
787 "Number of collisions: %u", tvb_get_ntohs(tvb, cur_offset));
792 proto_tree_add_text(rr_tree, tvb, cur_offset,
793 data_len, "(incomplete entry)");
796 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
797 "Number of send aborts: %u", tvb_get_ntohs(tvb, cur_offset));
802 proto_tree_add_text(rr_tree, tvb, cur_offset,
803 data_len, "(incomplete entry)");
806 proto_tree_add_text(rr_tree, tvb, cur_offset, 4,
807 "Number of good sends: %u", tvb_get_ntohl(tvb, cur_offset));
812 proto_tree_add_text(rr_tree, tvb, cur_offset,
813 data_len, "(incomplete entry)");
816 proto_tree_add_text(rr_tree, tvb, cur_offset, 4,
817 "Number of good receives: %u",
818 tvb_get_ntohl(tvb, cur_offset));
823 proto_tree_add_text(rr_tree, tvb, cur_offset,
824 data_len, "(incomplete entry)");
827 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
828 "Number of retransmits: %u", tvb_get_ntohs(tvb, cur_offset));
833 proto_tree_add_text(rr_tree, tvb, cur_offset,
834 data_len, "(incomplete entry)");
837 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
838 "Number of no resource conditions: %u",
839 tvb_get_ntohs(tvb, cur_offset));
844 proto_tree_add_text(rr_tree, tvb, cur_offset,
845 data_len, "(incomplete entry)");
848 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
849 "Number of command blocks: %u",
850 tvb_get_ntohs(tvb, cur_offset));
855 proto_tree_add_text(rr_tree, tvb, cur_offset,
856 data_len, "(incomplete entry)");
859 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
860 "Number of pending sessions: %u",
861 tvb_get_ntohs(tvb, cur_offset));
866 proto_tree_add_text(rr_tree, tvb, cur_offset,
867 data_len, "(incomplete entry)");
870 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
871 "Max number of pending sessions: %u",
872 tvb_get_ntohs(tvb, cur_offset));
877 proto_tree_add_text(rr_tree, tvb, cur_offset,
878 data_len, "(incomplete entry)");
881 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
882 "Max total sessions possible: %u",
883 tvb_get_ntohs(tvb, cur_offset));
888 proto_tree_add_text(rr_tree, tvb, cur_offset,
889 data_len, "(incomplete entry)");
892 proto_tree_add_text(rr_tree, tvb, cur_offset, 2,
893 "Session data packet size: %u",
894 tvb_get_ntohs(tvb, cur_offset));
902 col_append_fstr(cinfo, COL_INFO, " %s", type_name);
903 if (nbns_tree == NULL)
905 trr = proto_tree_add_text(nbns_tree, tvb, offset,
906 (data_offset - data_start) + data_len,
907 "%s: type %s, class %s",
908 name, type_name, class_name);
909 rr_tree = add_rr_to_tree(trr, ett_nbns_rr, tvb, offset, name,
910 name_len, type_name, class_name, ttl, data_len);
911 proto_tree_add_text(rr_tree, tvb, cur_offset, data_len, "Data");
912 cur_offset += data_len;
916 return cur_offset - data_start;
920 dissect_query_records(tvbuff_t *tvb, int cur_off, int nbns_data_offset,
921 int count, column_info *cinfo, proto_tree *nbns_tree)
923 int start_off, add_off;
924 proto_tree *qatree = NULL;
925 proto_item *ti = NULL;
928 if (nbns_tree != NULL) {
929 ti = proto_tree_add_text(nbns_tree, tvb, start_off, 0, "Queries");
930 qatree = proto_item_add_subtree(ti, ett_nbns_qry);
932 while (count-- > 0) {
933 add_off = dissect_nbns_query(tvb, cur_off, nbns_data_offset,
936 /* We ran past the end of the captured data in the
943 proto_item_set_len(ti, cur_off - start_off);
945 return cur_off - start_off;
951 dissect_answer_records(tvbuff_t *tvb, int cur_off, int nbns_data_offset,
952 int count, column_info *cinfo, proto_tree *nbns_tree, int opcode,
955 int start_off, add_off;
956 proto_tree *qatree = NULL;
957 proto_item *ti = NULL;
960 if (nbns_tree != NULL) {
961 ti = proto_tree_add_text(nbns_tree, tvb, start_off, 0, name);
962 qatree = proto_item_add_subtree(ti, ett_nbns_ans);
964 while (count-- > 0) {
965 add_off = dissect_nbns_answer(tvb, cur_off, nbns_data_offset,
966 cinfo, qatree, opcode);
968 /* We ran past the end of the captured data in the
975 proto_item_set_len(ti, cur_off - start_off);
976 return cur_off - start_off;
980 dissect_nbns(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
983 int nbns_data_offset;
985 proto_tree *nbns_tree = NULL;
987 guint16 id, flags, quest, ans, auth, add;
990 nbns_data_offset = offset;
992 if (check_col(pinfo->cinfo, COL_PROTOCOL))
993 col_set_str(pinfo->cinfo, COL_PROTOCOL, "NBNS");
994 if (check_col(pinfo->cinfo, COL_INFO))
995 col_clear(pinfo->cinfo, COL_INFO);
997 /* To do: check for runts, errs, etc. */
998 id = tvb_get_ntohs(tvb, offset + NBNS_ID);
999 flags = tvb_get_ntohs(tvb, offset + NBNS_FLAGS);
1001 if (check_col(pinfo->cinfo, COL_INFO)) {
1002 col_add_fstr(pinfo->cinfo, COL_INFO, "%s%s",
1003 val_to_str(flags & F_OPCODE, opcode_vals,
1004 "Unknown operation (%x)"),
1005 (flags & F_RESPONSE) ? " response" : "");
1006 cinfo = pinfo->cinfo;
1008 /* Set "cinfo" to NULL; we pass a NULL "cinfo" to the query
1009 and answer dissectors, as a way of saying that they
1010 shouldn't add stuff to the COL_INFO column (a call to
1011 "check_col(cinfo, COL_INFO)" is more expensive than
1012 a check that a pointer isn't NULL). */
1017 ti = proto_tree_add_item(tree, proto_nbns, tvb, offset,
1018 tvb_length(tvb), FALSE);
1019 nbns_tree = proto_item_add_subtree(ti, ett_nbns);
1021 if (flags & F_RESPONSE) {
1022 proto_tree_add_boolean_hidden(nbns_tree, hf_nbns_response, tvb,
1025 proto_tree_add_boolean_hidden(nbns_tree, hf_nbns_query, tvb,
1029 proto_tree_add_uint(nbns_tree, hf_nbns_transaction_id, tvb,
1030 offset + NBNS_ID, 2, id);
1032 nbns_add_nbns_flags(nbns_tree, tvb, offset + NBNS_FLAGS,
1035 quest = tvb_get_ntohs(tvb, offset + NBNS_QUEST);
1037 proto_tree_add_uint(nbns_tree, hf_nbns_count_questions, tvb,
1038 offset + NBNS_QUEST, 2, quest);
1040 ans = tvb_get_ntohs(tvb, offset + NBNS_ANS);
1042 proto_tree_add_uint(nbns_tree, hf_nbns_count_answers, tvb,
1043 offset + NBNS_ANS, 2, ans);
1045 auth = tvb_get_ntohs(tvb, offset + NBNS_AUTH);
1047 proto_tree_add_uint(nbns_tree, hf_nbns_count_auth_rr, tvb,
1048 offset + NBNS_AUTH, 2, auth);
1050 add = tvb_get_ntohs(tvb, offset + NBNS_ADD);
1052 proto_tree_add_uint(nbns_tree, hf_nbns_count_add_rr, tvb,
1053 offset + NBNS_ADD, 2, add);
1056 cur_off = offset + NBNS_HDRLEN;
1059 /* If this is a response, don't add information about the
1060 queries to the summary, just add information about the
1062 cur_off += dissect_query_records(tvb, cur_off,
1063 nbns_data_offset, quest,
1064 (!(flags & F_RESPONSE) ? cinfo : NULL), nbns_tree);
1068 /* If this is a request, don't add information about the
1069 answers to the summary, just add information about the
1071 cur_off += dissect_answer_records(tvb, cur_off,
1072 nbns_data_offset, ans,
1073 ((flags & F_RESPONSE) ? cinfo : NULL), nbns_tree,
1074 flags & F_OPCODE, "Answers");
1078 /* Don't add information about the authoritative name
1079 servers, or the additional records, to the summary. */
1081 cur_off += dissect_answer_records(tvb, cur_off,
1083 auth, NULL, nbns_tree,
1085 "Authoritative nameservers");
1088 cur_off += dissect_answer_records(tvb, cur_off,
1090 add, NULL, nbns_tree,
1092 "Additional records");
1096 /* NetBIOS datagram packet, from RFC 1002, page 32 */
1097 struct nbdgm_header {
1108 /* For packets with data */
1112 /* For error packets */
1117 * NBDS message types.
1119 #define NBDS_DIRECT_UNIQUE 0x10
1120 #define NBDS_DIRECT_GROUP 0x11
1121 #define NBDS_BROADCAST 0x12
1122 #define NBDS_ERROR 0x13
1123 #define NBDS_QUERY_REQUEST 0x14
1124 #define NBDS_POS_QUERY_RESPONSE 0x15
1125 #define NBDS_NEG_QUERY_RESPONSE 0x16
1127 static const value_string nbds_msgtype_vals[] = {
1128 { NBDS_DIRECT_UNIQUE, "Direct_unique datagram" },
1129 { NBDS_DIRECT_GROUP, "Direct_group datagram" },
1130 { NBDS_BROADCAST, "Broadcast datagram" },
1131 { NBDS_ERROR, "Datagram error" },
1132 { NBDS_QUERY_REQUEST, "Datagram query request" },
1133 { NBDS_POS_QUERY_RESPONSE, "Datagram positive query response" },
1134 { NBDS_NEG_QUERY_RESPONSE, "Datagram negative query response" },
1138 static const true_false_string yesno = {
1143 static const value_string node_type_vals[] = {
1152 dissect_nbdgm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1155 proto_tree *nbdgm_tree = NULL;
1156 proto_item *ti = NULL;
1157 struct nbdgm_header header;
1162 static const value_string error_codes[] = {
1163 { 0x82, "Destination name not present" },
1164 { 0x83, "Invalid source name format" },
1165 { 0x84, "Invalid destination name format" },
1169 char name[(NETBIOS_NAME_LEN - 1)*4 + MAXDNAME];
1173 if (check_col(pinfo->cinfo, COL_PROTOCOL))
1174 col_set_str(pinfo->cinfo, COL_PROTOCOL, "NBDS");
1175 if (check_col(pinfo->cinfo, COL_INFO))
1176 col_clear(pinfo->cinfo, COL_INFO);
1178 header.msg_type = tvb_get_guint8(tvb, offset);
1180 flags = tvb_get_guint8(tvb, offset+1);
1181 header.flags.more = flags & 1;
1182 header.flags.first = (flags & 2) >> 1;
1183 header.flags.node_type = (flags & 12) >> 2;
1185 header.dgm_id = tvb_get_ntohs(tvb, offset+2);
1186 tvb_memcpy(tvb, (guint8 *)&header.src_ip, offset+4, 4);
1187 header.src_port = tvb_get_ntohs(tvb, offset+8);
1189 switch (header.msg_type) {
1191 case NBDS_DIRECT_UNIQUE:
1192 case NBDS_DIRECT_GROUP:
1193 case NBDS_BROADCAST:
1194 header.dgm_length = tvb_get_ntohs(tvb, offset+10);
1195 header.pkt_offset = tvb_get_ntohs(tvb, offset+12);
1199 header.error_code = tvb_get_ntohs(tvb, offset+10);
1203 message_index = header.msg_type - 0x0f;
1204 if (message_index < 1 || message_index > 8) {
1208 if (check_col(pinfo->cinfo, COL_INFO)) {
1209 col_add_str(pinfo->cinfo, COL_INFO,
1210 val_to_str(header.msg_type, nbds_msgtype_vals,
1211 "Unknown message type (0x%02X)"));
1215 ti = proto_tree_add_item(tree, proto_nbdgm, tvb, offset,
1216 tvb_length_remaining(tvb, offset), FALSE);
1217 nbdgm_tree = proto_item_add_subtree(ti, ett_nbdgm);
1219 proto_tree_add_uint(nbdgm_tree, hf_nbdgm_type, tvb,
1222 proto_tree_add_boolean(nbdgm_tree, hf_nbdgm_fragment, tvb,
1225 proto_tree_add_boolean(nbdgm_tree, hf_nbdgm_first, tvb,
1227 header.flags.first);
1228 proto_tree_add_uint(nbdgm_tree, hf_nbdgm_node_type, tvb,
1230 header.flags.node_type);
1232 proto_tree_add_uint(nbdgm_tree, hf_nbdgm_datagram_id, tvb,
1233 offset+2, 2, header.dgm_id);
1234 proto_tree_add_ipv4(nbdgm_tree, hf_nbdgm_src_ip, tvb,
1235 offset+4, 4, header.src_ip);
1236 proto_tree_add_uint(nbdgm_tree, hf_nbdgm_src_port, tvb,
1237 offset+8, 2, header.src_port);
1243 switch (header.msg_type) {
1245 case NBDS_DIRECT_UNIQUE:
1246 case NBDS_DIRECT_GROUP:
1247 case NBDS_BROADCAST:
1249 proto_tree_add_text(nbdgm_tree, tvb, offset, 2,
1250 "Datagram length: %d bytes", header.dgm_length);
1251 proto_tree_add_text(nbdgm_tree, tvb, offset+2, 2,
1252 "Packet offset: %d bytes", header.pkt_offset);
1258 len = get_nbns_name(tvb, offset, offset, name, &name_type);
1261 add_name_and_type(nbdgm_tree, tvb, offset, len,
1262 "Source name", name, name_type);
1266 /* Destination name */
1267 len = get_nbns_name(tvb, offset, offset, name, &name_type);
1270 add_name_and_type(nbdgm_tree, tvb, offset, len,
1271 "Destination name", name, name_type);
1276 * Here we can pass the packet off to the next protocol.
1277 * Set the length of our top-level tree item to include
1280 * XXX - take the datagram length into account?
1282 proto_item_set_len(ti, offset);
1283 next_tvb = tvb_new_subset(tvb, offset, -1, -1);
1284 dissect_netbios_payload(next_tvb, pinfo, tree);
1289 proto_tree_add_text(nbdgm_tree, tvb, offset, 1, "Error code: %s",
1290 val_to_str(header.error_code, error_codes, "Unknown (0x%x)"));
1293 proto_item_set_len(ti, offset);
1296 case NBDS_QUERY_REQUEST:
1297 case NBDS_POS_QUERY_RESPONSE:
1298 case NBDS_NEG_QUERY_RESPONSE:
1299 /* Destination name */
1300 len = get_nbns_name(tvb, offset, offset, name, &name_type);
1303 add_name_and_type(nbdgm_tree, tvb, offset, len,
1304 "Destination name", name, name_type);
1307 proto_item_set_len(ti, offset);
1313 * NetBIOS Session Service message types.
1315 #define SESSION_MESSAGE 0x00
1316 #define SESSION_REQUEST 0x81
1317 #define POSITIVE_SESSION_RESPONSE 0x82
1318 #define NEGATIVE_SESSION_RESPONSE 0x83
1319 #define RETARGET_SESSION_RESPONSE 0x84
1320 #define SESSION_KEEP_ALIVE 0x85
1322 static const value_string message_types[] = {
1323 { SESSION_MESSAGE, "Session message" },
1324 { SESSION_REQUEST, "Session request" },
1325 { POSITIVE_SESSION_RESPONSE, "Positive session response" },
1326 { NEGATIVE_SESSION_RESPONSE, "Negative session response" },
1327 { RETARGET_SESSION_RESPONSE, "Retarget session response" },
1328 { SESSION_KEEP_ALIVE, "Session keep-alive" },
1333 * NetBIOS Session Service flags.
1335 #define NBSS_FLAGS_E 0x1
1337 static const value_string error_codes[] = {
1338 { 0x80, "Not listening on called name" },
1339 { 0x81, "Not listening for called name" },
1340 { 0x82, "Called name not present" },
1341 { 0x83, "Called name present, but insufficient resources" },
1342 { 0x8F, "Unspecified error" },
1347 * Dissect a single NBSS packet (there may be more than one in a given
1350 * [ Hmmm, in my experience, I have never seen more than one NBSS in a
1351 * single segment, since they mostly contain SMBs which are essentially
1352 * a request response type protocol (RJS). ]
1354 * [ However, under heavy load with many requests multiplexed on one
1355 * session it is not unusual to see multiple requests in one TCP
1356 * segment. Unfortunately, in this case a single session message is
1357 * frequently split over multiple segments, which frustrates decoding
1361 dissect_nbss_packet(tvbuff_t *tvb, int offset, packet_info *pinfo,
1362 proto_tree *tree, int max_data, int is_cifs)
1364 proto_tree *nbss_tree = NULL;
1365 proto_item *ti = NULL;
1366 proto_tree *field_tree;
1372 char name[(NETBIOS_NAME_LEN - 1)*4 + MAXDNAME];
1377 msg_type = tvb_get_guint8(tvb, offset);
1381 length = tvb_get_ntoh24(tvb, offset + 1);
1383 flags = tvb_get_guint8(tvb, offset + 1);
1384 length = tvb_get_ntohs(tvb, offset + 2);
1385 if (flags & NBSS_FLAGS_E)
1390 if (nbss_desegment) {
1391 if (pinfo->can_desegment
1392 && length > tvb_length_remaining(tvb, offset+4)) {
1394 * This frame doesn't have all of the data for
1395 * this message, but we can do reassembly on it.
1397 * Tell the TCP dissector where the data for this
1398 * message starts in the data it handed us, and
1399 * how many more bytes we need, and return.
1401 pinfo->desegment_offset = offset;
1402 pinfo->desegment_len =
1403 length - tvb_length_remaining(tvb, offset+4);
1409 ti = proto_tree_add_item(tree, proto_nbss, tvb, offset, length + 4, FALSE);
1410 nbss_tree = proto_item_add_subtree(ti, ett_nbss);
1412 proto_tree_add_uint_format(nbss_tree, hf_nbss_type, tvb,
1416 val_to_str(msg_type, message_types,
1424 proto_tree_add_text(nbss_tree, tvb, offset, 3, "Length: %u", length);
1429 tf = proto_tree_add_uint(nbss_tree, hf_nbss_flags, tvb, offset, 1, flags);
1430 field_tree = proto_item_add_subtree(tf, ett_nbss_flags);
1431 proto_tree_add_text(field_tree, tvb, offset, 1, "%s",
1432 decode_boolean_bitfield(flags, NBSS_FLAGS_E,
1433 8, "Add 65536 to length", "Add 0 to length"));
1438 proto_tree_add_text(nbss_tree, tvb, offset, 2, "Length: %u", length);
1446 case SESSION_REQUEST:
1447 len = get_nbns_name(tvb, offset, offset, name, &name_type);
1449 add_name_and_type(nbss_tree, tvb, offset, len,
1450 "Called name", name, name_type);
1453 len = get_nbns_name(tvb, offset, offset, name, &name_type);
1456 add_name_and_type(nbss_tree, tvb, offset, len,
1457 "Calling name", name, name_type);
1461 case NEGATIVE_SESSION_RESPONSE:
1463 proto_tree_add_text(nbss_tree, tvb, offset, 1,
1465 val_to_str(tvb_get_guint8(tvb, offset),
1466 error_codes, "Unknown (%x)"));
1469 case RETARGET_SESSION_RESPONSE:
1471 proto_tree_add_text(nbss_tree, tvb, offset, 4,
1472 "Retarget IP address: %s",
1473 ip_to_str(tvb_get_ptr(tvb, offset, 4)));
1478 proto_tree_add_text(nbss_tree, tvb, offset, 2,
1479 "Retarget port: %u",
1480 tvb_get_ntohs(tvb, offset));
1484 case SESSION_MESSAGE:
1486 * Here we can pass the message off to the next protocol.
1487 * Set the length of our top-level tree item to include
1490 proto_item_set_len(ti, offset);
1491 len = tvb_length_remaining(tvb, offset);
1492 reported_len = tvb_reported_length_remaining(tvb, offset);
1495 if (reported_len > length)
1496 reported_len = length;
1497 next_tvb = tvb_new_subset(tvb, offset, len, reported_len);
1498 dissect_netbios_payload(next_tvb, pinfo, tree);
1506 dissect_nbss(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1508 struct tcpinfo *tcpinfo = pinfo->private_data;
1516 proto_tree *nbss_tree;
1519 if (check_col(pinfo->cinfo, COL_PROTOCOL))
1520 col_set_str(pinfo->cinfo, COL_PROTOCOL, "NBSS");
1521 if (check_col(pinfo->cinfo, COL_INFO))
1522 col_clear(pinfo->cinfo, COL_INFO);
1524 max_data = tvb_length(tvb);
1526 msg_type = tvb_get_guint8(tvb, offset);
1528 if (pinfo->match_port == TCP_PORT_CIFS) {
1530 * Windows 2000 CIFS clients can dispense completely
1531 * with the NETBIOS encapsulation and directly use CIFS
1532 * over TCP. As would be expected, the framing is
1533 * identical, except that the length is 24 bits instead
1534 * of 17. The only message types used are
1535 * SESSION_MESSAGE and SESSION_KEEP_ALIVE.
1543 * This might be a continuation of an earlier message.
1544 * (Yes, that might be true even if we're doing TCP reassembly,
1545 * as the first TCP segment in the capture might start in the
1546 * middle of an NBNS message.)
1550 * If this isn't reassembled data, check to see whether it
1551 * looks like a continuation of a message.
1552 * (If it is reassembled data, it shouldn't be a continuation,
1553 * as reassembly should've gathered the continuations together
1556 if (!tcpinfo->is_reassembled) {
1559 * Not enough data for an NBSS header; assume
1560 * it's a continuation of a message.
1562 * XXX - if there's not enough data, we should
1563 * attempt to reassemble the data, if the first byte
1564 * is a valid message type.
1570 * We have enough data for an NBSS header.
1571 * Get the flags and length of the message,
1572 * and see if they're sane.
1576 length = tvb_get_ntoh24(tvb, offset + 1);
1578 flags = tvb_get_guint8(tvb, offset + 1);
1579 length = tvb_get_ntohs(tvb, offset + 2);
1580 if (flags & NBSS_FLAGS_E)
1583 if ((flags & (~NBSS_FLAGS_E)) != 0) {
1585 * A bogus flag was set; assume it's a continuation.
1592 case SESSION_MESSAGE:
1594 * This is variable-length.
1595 * All we know is that it shouldn't be zero.
1596 * (XXX - can we get zero-length messages?
1597 * Not with SMB, but perhaps other NetBIOS-based
1598 * protocols have them.)
1604 case SESSION_REQUEST:
1606 * This is variable-length.
1607 * The names are DNS-encoded 32-byte values;
1608 * we need at least 2 bytes (one for each name;
1609 * actually, we should have more for the first
1610 * name, as there's no name preceding it so
1611 * there should be no compression), and we
1612 * shouldn't have more than 128 bytes (actually,
1613 * we shouldn't have that many).
1615 * XXX - actually, MacOS X 10.1 (yes, that's
1616 * redundant, but that's what Apple calls it,
1617 * not MacOS X.1) puts names longer than 16
1618 * characters into session request messages,
1619 * so we can have more than 32 bytes of
1620 * name value, so we can have more than 128
1623 if (length < 2 || length > 256)
1627 case POSITIVE_SESSION_RESPONSE:
1629 * This has no data, so the length must be zero.
1635 case NEGATIVE_SESSION_RESPONSE:
1637 * This has 1 byte of data.
1643 case RETARGET_SESSION_RESPONSE:
1645 * This has 6 bytes of data.
1651 case SESSION_KEEP_ALIVE:
1653 * This has no data, so the length must be zero.
1661 * Unknown message type; assume it's a continuation.
1667 if (check_col(pinfo->cinfo, COL_INFO)) {
1668 col_add_fstr(pinfo->cinfo, COL_INFO,
1669 val_to_str(msg_type, message_types, "Unknown (%02x)"));
1672 while (max_data > 0) {
1673 len = dissect_nbss_packet(tvb, offset, pinfo, tree, max_data,
1683 * It looks like a continuation.
1685 if (check_col(pinfo->cinfo, COL_INFO))
1686 col_add_fstr(pinfo->cinfo, COL_INFO, "NBSS Continuation Message");
1689 ti = proto_tree_add_item(tree, proto_nbss, tvb, 0,
1691 nbss_tree = proto_item_add_subtree(ti, ett_nbss);
1692 proto_tree_add_text(nbss_tree, tvb, 0, max_data,
1693 "Continuation data");
1698 proto_register_nbt(void)
1701 static hf_register_info hf_nbns[] = {
1702 { &hf_nbns_response,
1703 { "Response", "nbns.response",
1704 FT_BOOLEAN, BASE_NONE, NULL, 0x0,
1705 "TRUE if NBNS response", HFILL }},
1707 { "Query", "nbns.query",
1708 FT_BOOLEAN, BASE_NONE, NULL, 0x0,
1709 "TRUE if NBNS query", HFILL }},
1710 { &hf_nbns_transaction_id,
1711 { "Transaction ID", "nbns.id",
1712 FT_UINT16, BASE_HEX, NULL, 0x0,
1713 "Identification of transaction", HFILL }},
1714 { &hf_nbns_count_questions,
1715 { "Questions", "nbns.count.queries",
1716 FT_UINT16, BASE_DEC, NULL, 0x0,
1717 "Number of queries in packet", HFILL }},
1718 { &hf_nbns_count_answers,
1719 { "Answer RRs", "nbns.count.answers",
1720 FT_UINT16, BASE_DEC, NULL, 0x0,
1721 "Number of answers in packet", HFILL }},
1722 { &hf_nbns_count_auth_rr,
1723 { "Authority RRs", "nbns.count.auth_rr",
1724 FT_UINT16, BASE_DEC, NULL, 0x0,
1725 "Number of authoritative records in packet", HFILL }},
1726 { &hf_nbns_count_add_rr,
1727 { "Additional RRs", "nbns.count.add_rr",
1728 FT_UINT16, BASE_DEC, NULL, 0x0,
1729 "Number of additional records in packet", HFILL }}
1732 static hf_register_info hf_nbdgm[] = {
1734 { "Message Type", "nbdgm.type",
1735 FT_UINT8, BASE_DEC, VALS(nbds_msgtype_vals), 0x0,
1736 "NBDGM message type", HFILL }},
1737 { &hf_nbdgm_fragment,
1738 { "More fragments follow", "nbdgm.next",
1739 FT_BOOLEAN, BASE_NONE, TFS(&yesno), 0x0,
1740 "TRUE if more fragments follow", HFILL }},
1742 { "This is first fragment", "nbdgm.first",
1743 FT_BOOLEAN, BASE_NONE, TFS(&yesno), 0x0,
1744 "TRUE if first fragment", HFILL }},
1745 { &hf_nbdgm_node_type,
1746 { "Node Type", "nbdgm.node_type",
1747 FT_UINT8, BASE_DEC, VALS(node_type_vals), 0x0,
1748 "Node type", HFILL }},
1749 { &hf_nbdgm_datagram_id,
1750 { "Datagram ID", "nbdgm.dgram_id",
1751 FT_UINT16, BASE_HEX, NULL, 0x0,
1752 "Datagram identifier", HFILL }},
1754 { "Source IP", "nbdgm.src.ip",
1755 FT_IPv4, BASE_NONE, NULL, 0x0,
1756 "Source IPv4 address", HFILL }},
1757 { &hf_nbdgm_src_port,
1758 { "Source Port", "nbdgm.src.port",
1759 FT_UINT16, BASE_DEC, NULL, 0x0,
1760 "Source port", HFILL }}
1763 static hf_register_info hf_nbss[] = {
1765 { "Message Type", "nbss.type",
1766 FT_UINT8, BASE_DEC, NULL, 0x0,
1767 "NBSS message type", HFILL }},
1769 { "Flags", "nbss.flags",
1770 FT_UINT8, BASE_HEX, NULL, 0x0,
1771 "NBSS message flags", HFILL }}
1773 static gint *ett[] = {
1778 &ett_nbns_name_flags,
1786 module_t *nbss_module;
1788 proto_nbns = proto_register_protocol("NetBIOS Name Service", "NBNS", "nbns");
1789 proto_register_field_array(proto_nbns, hf_nbns, array_length(hf_nbns));
1791 proto_nbdgm = proto_register_protocol("NetBIOS Datagram Service",
1793 proto_register_field_array(proto_nbdgm, hf_nbdgm, array_length(hf_nbdgm));
1795 proto_nbss = proto_register_protocol("NetBIOS Session Service",
1797 proto_register_field_array(proto_nbss, hf_nbss, array_length(hf_nbss));
1799 proto_register_subtree_array(ett, array_length(ett));
1801 nbss_module = prefs_register_protocol(proto_nbss, NULL);
1802 prefs_register_bool_preference(nbss_module, "desegment_nbss_commands",
1803 "Desegment all NBSS packets spanning multiple TCP segments",
1804 "Whether NBSS dissector should desegment all packets spanning multiple TCP segments",
1809 proto_reg_handoff_nbt(void)
1811 dissector_handle_t nbns_handle, nbdgm_handle, nbss_handle;
1813 nbns_handle = create_dissector_handle(dissect_nbns, proto_nbns);
1814 dissector_add("udp.port", UDP_PORT_NBNS, nbns_handle);
1815 nbdgm_handle = create_dissector_handle(dissect_nbdgm, proto_nbdgm);
1816 dissector_add("udp.port", UDP_PORT_NBDGM, nbdgm_handle);
1817 nbss_handle = create_dissector_handle(dissect_nbss, proto_nbss);
1818 dissector_add("tcp.port", TCP_PORT_NBSS, nbss_handle);
1819 dissector_add("tcp.port", TCP_PORT_CIFS, nbss_handle);