2 * Routines for KDP (Kontiki Delivery Protocol) packet disassembly
6 * Copyright (c) 2008 by Kontiki Inc.
7 * Wade Hennessey <wade@kontiki.com>
9 * Wireshark - Network traffic analyzer
10 * By Gerald Combs <gerald@wireshark.org>
11 * Copyright 1999 Gerald Combs
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version 2
16 * of the License, or (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
32 #include <epan/packet.h>
35 #define KDP_PORT 19948
36 #define BUFFER_SIZE 80
37 static int proto_kdp = -1;
38 static gint ett_kdp = -1;
39 static gint ett_kdp_flags = -1;
41 static int hf_kdp_version = -1;
42 static int hf_kdp_headerlen = -1;
43 static int hf_kdp_flags = -1;
44 static int hf_kdp_errors = -1;
45 static int hf_kdp_destflowid = -1;
46 static int hf_kdp_srcflowid = -1;
47 static int hf_kdp_sequence = -1;
48 static int hf_kdp_ack = -1;
49 static int hf_kdp_maxsegmentsize = -1;
50 static int hf_kdp_optionnumber = -1;
51 static int hf_kdp_optionlen = -1;
52 static int hf_kdp_option1 = -1;
53 static int hf_kdp_option2 = -1;
54 static int hf_kdp_fragment = -1;
55 static int hf_kdp_fragtotal = -1;
56 static int hf_kdp_body = -1;
57 static int hf_kdp_xml_body = -1;
59 #define KDP_DROP_FLAG (1 << 0)
60 #define KDP_SYN_FLAG (1 << 1)
61 #define KDP_ACK_FLAG (1 << 2)
62 #define KDP_RST_FLAG (1 << 3)
63 #define KDP_BCST_FLAG (1 << 4)
64 #define KDP_DUP_FLAG (1 << 5)
66 static int hf_kdp_drop_flag = -1;
67 static int hf_kdp_syn_flag = -1;
68 static int hf_kdp_ack_flag = -1;
69 static int hf_kdp_rst_flag = -1;
70 static int hf_kdp_bcst_flag = -1;
71 static int hf_kdp_dup_flag = -1;
73 static void dissect_kdp(tvbuff_t *tvb,
78 guint8 header_len = 0;
79 guint8 packet_flags = 0;
80 guint8 packet_errors = 0;
81 guint32 sequence_number = G_MAXUINT32;
82 guint32 ack_number = G_MAXUINT32;
83 guint32 src_flowid = G_MAXUINT32;
86 col_set_str(pinfo->cinfo, COL_PROTOCOL, "KDP");
87 if (check_col(pinfo->cinfo, COL_INFO)) {
88 col_clear(pinfo->cinfo, COL_INFO);
92 proto_tree *kdp_tree, *flags_tree;
97 ti = proto_tree_add_item(tree, proto_kdp, tvb, 0, -1, FALSE);
98 kdp_tree = proto_item_add_subtree(ti, ett_kdp);
100 version = tvb_get_guint8(tvb, 0);
102 /* Version other than 2 is really SDDP in UDP */
103 proto_tree_add_item(kdp_tree, hf_kdp_version, tvb, 0, 1, FALSE);
104 proto_tree_add_item(kdp_tree, hf_kdp_xml_body, tvb, 0, -1, FALSE);
106 header_len = tvb_get_guint8(tvb, 1) * 4;
107 body_len = tvb_reported_length(tvb);
108 if (header_len > body_len) {
109 body_len = 0; /* malformed packet */
111 body_len = body_len - header_len;
113 packet_flags = tvb_get_guint8(tvb, 2);
114 packet_errors = tvb_get_guint8(tvb, 3);
115 proto_tree_add_item(kdp_tree, hf_kdp_version, tvb, 0, 1, FALSE);
116 proto_tree_add_item(kdp_tree, hf_kdp_headerlen, tvb, 1, 1, FALSE);
117 ti = proto_tree_add_item(kdp_tree, hf_kdp_flags, tvb, 2, 1, FALSE);
118 flags_tree = proto_item_add_subtree(ti, ett_kdp_flags);
120 proto_tree_add_item(flags_tree, hf_kdp_drop_flag, tvb, 2, 1, FALSE);
121 proto_tree_add_item(flags_tree, hf_kdp_syn_flag, tvb, 2, 1, FALSE);
122 proto_tree_add_item(flags_tree, hf_kdp_ack_flag, tvb, 2, 1, FALSE);
123 proto_tree_add_item(flags_tree, hf_kdp_rst_flag, tvb, 2, 1, FALSE);
124 proto_tree_add_item(flags_tree, hf_kdp_bcst_flag, tvb, 2, 1, FALSE);
125 proto_tree_add_item(flags_tree, hf_kdp_dup_flag, tvb, 2, 1, FALSE);
127 proto_tree_add_item(kdp_tree, hf_kdp_errors, tvb, 3, 1, FALSE);
129 if (header_len > 4) {
131 if (packet_flags & KDP_ACK_FLAG) {
132 proto_tree_add_item(kdp_tree, hf_kdp_destflowid, tvb, offset, 4, FALSE);
136 if (packet_flags & (KDP_SYN_FLAG | KDP_BCST_FLAG)) {
137 proto_tree_add_item(kdp_tree, hf_kdp_srcflowid, tvb, offset, 4, FALSE);
138 src_flowid = tvb_get_ntohl(tvb, offset);
142 proto_tree_add_item(kdp_tree, hf_kdp_sequence, tvb, offset, 4, FALSE);
143 sequence_number = tvb_get_ntohl(tvb, offset);
146 if (packet_flags & KDP_ACK_FLAG) {
147 proto_tree_add_item(kdp_tree, hf_kdp_ack, tvb, offset, 4, FALSE);
148 ack_number = tvb_get_ntohl(tvb, offset);
151 if (packet_flags & KDP_SYN_FLAG) {
152 proto_tree_add_item(kdp_tree,
153 hf_kdp_maxsegmentsize, tvb, offset, 4, FALSE);
157 while (offset < ((body_len > 0) ? header_len - 4 : header_len)) {
158 guint8 option_number;
160 option_number = tvb_get_guint8(tvb, offset);
162 proto_tree_add_item(kdp_tree,
163 hf_kdp_optionnumber, tvb, offset, 1, FALSE);
165 if (option_number > 0) {
166 proto_tree_add_item(kdp_tree,
167 hf_kdp_optionlen, tvb, offset, 1, FALSE);
171 switch (option_number) {
175 proto_tree_add_item(kdp_tree, hf_kdp_option1, tvb, offset, 2, FALSE);
179 proto_tree_add_item(kdp_tree, hf_kdp_option2, tvb, offset, 2, FALSE);
182 default: body_len = 0; /* Invalid option - ignore rest of packet */
187 proto_tree_add_item(kdp_tree, hf_kdp_fragment, tvb, offset, 2, FALSE);
190 proto_tree_add_item(kdp_tree, hf_kdp_fragtotal, tvb, offset, 2, FALSE);
193 proto_tree_add_item(kdp_tree, hf_kdp_body, tvb, offset, -1, FALSE);
198 /* Now that we know sequence number and optional ack number, we can
199 print more detailed summary info */
200 if (check_col(pinfo->cinfo, COL_INFO)) {
202 col_add_fstr(pinfo->cinfo, COL_INFO, "SDDP message");
204 char ack_string[BUFFER_SIZE];
205 char seq_num_string[BUFFER_SIZE];
206 char src_flowid_string[BUFFER_SIZE];
208 if (packet_flags & KDP_ACK_FLAG) {
209 g_snprintf(ack_string, sizeof(ack_string), "ACK=%x ", ack_number);
211 ack_string[0] = '\0';
213 if (header_len > 4) {
214 g_snprintf(seq_num_string, sizeof(seq_num_string), "SEQ=%x ", sequence_number);
216 seq_num_string[0] = '\0';
218 if (packet_flags & (KDP_SYN_FLAG | KDP_BCST_FLAG)) {
219 g_snprintf(src_flowid_string, sizeof(src_flowid_string), "SRC_FLOWID=%x ", src_flowid);
221 src_flowid_string[0] = '\0';
223 col_add_fstr(pinfo->cinfo, COL_INFO, "%s%s%s%s%s%s%s%serrors=%d",
224 ((packet_flags & KDP_DROP_FLAG) ? "DROP " : ""),
225 ((packet_flags & KDP_SYN_FLAG) ? "SYN " : ""),
226 ((packet_flags & KDP_RST_FLAG) ? "RST " : ""),
227 ((packet_flags & KDP_BCST_FLAG) ? "BCST " : ""),
228 ((packet_flags & KDP_DUP_FLAG) ? "DUP " : ""),
237 void proto_register_kdp(void) {
239 static hf_register_info hf[] = {
241 {"KDP version", "kdp.version",
242 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}
245 {"KDP header len", "kdp.headerlen",
246 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}
249 {"KDP flags", "kdp.flags",
250 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}
253 {"KDP DROP Flag", "kdp.flags.drop",
254 FT_BOOLEAN, 8, NULL, KDP_DROP_FLAG, NULL, HFILL}
257 {"KDP SYN Flag", "kdp.flags.syn",
258 FT_BOOLEAN, 8, NULL, KDP_SYN_FLAG, NULL, HFILL}
261 {"KDP ACK Flag", "kdp.flags.ack",
262 FT_BOOLEAN, 8, NULL, KDP_ACK_FLAG, NULL, HFILL}
265 {"KDP RST Flag", "kdp.flags.rst",
266 FT_BOOLEAN, 8, NULL, KDP_RST_FLAG, NULL, HFILL}
269 {"KDP BCST Flag", "kdp.flags.bcst",
270 FT_BOOLEAN, 8, NULL, KDP_BCST_FLAG, NULL, HFILL}
273 {"KDP DUP Flag", "kdp.flags.dup",
274 FT_BOOLEAN, 8, NULL, KDP_DUP_FLAG, NULL, HFILL}
277 {"KDP errors", "kdp.errors",
278 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}
280 { &hf_kdp_destflowid,
281 { "DestFlowID", "kdp.destflowid",
282 FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}
285 { "SrcFlowID", "kdp.srcflowid",
286 FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}
289 { "Sequence", "kdp.sequence",
290 FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}
294 FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}
296 { &hf_kdp_maxsegmentsize,
297 { "MaxSegmentSize", "kdp.maxsegmentsize",
298 FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}
300 { &hf_kdp_optionnumber,
301 { "Option Number", "kdp.optionnumber",
302 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}
305 { "Option Len", "kdp.option",
306 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}
309 { "Option1 - Max Window", "kdp.option1",
310 FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}
313 { "Option2 - TCP Fraction", "kdp.option2",
314 FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}
317 { "Fragment", "kdp.fragment",
318 FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}
321 { "FragTotal", "kdp.fragtotal",
322 FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}
325 { "Encrypted Body", "kdp.body",
326 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL}
329 { "XML Body", "kdp.body",
330 FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL}
334 /* Setup protocol subtree array */
335 static gint *ett[] = {
336 &ett_kdp, &ett_kdp_flags
339 proto_kdp = proto_register_protocol("Kontiki Delivery Protocol", /* name */
340 "KDP", /* short name */
342 proto_register_field_array(proto_kdp, hf, array_length(hf));
343 proto_register_subtree_array(ett, array_length(ett));
347 proto_reg_handoff_kdp(void) {
348 dissector_handle_t kdp_handle;
349 kdp_handle = create_dissector_handle(dissect_kdp, proto_kdp);
350 dissector_add("udp.port", KDP_PORT, kdp_handle);