1 /* packet-asap.c
2 * Routines for Aggregate Server Access Protocol (ASAP)
3 * It is hopefully (needs testing) compliant to
4 * RFC 5352
5 * RFC 5354
6 * RFC 5356
7 * https://tools.ietf.org/html/draft-dreibholz-rserpool-asap-hropt-27
8 * https://tools.ietf.org/html/draft-dreibholz-rserpool-delay-26
9 *
10 * Copyright 2008-2021 Thomas Dreibholz <dreibh [AT] iem.uni-due.de>
11 * Copyright 2004-2007 Michael Tüxen <tuexen [AT] fh-muenster.de>
12 *
13 * Wireshark - Network traffic analyzer
14 * By Gerald Combs <gerald@wireshark.org>
15 * Copyright 1998 Gerald Combs
16 *
17 * Copied from README.developer
18 *
19 * SPDX-License-Identifier: GPL-2.0-or-later
20 */
21
22 #include "config.h"
23
24 #include <epan/packet.h>
25 #include <epan/to_str.h>
26 #include <epan/sctpppids.h>
27 #include <epan/stat_tap_ui.h>
28
29 #include <wsutil/str_util.h>
30
31 #include "packet-asap+enrp-common.h"
32
33 void proto_register_asap(void);
34 void proto_reg_handoff_asap(void);
35
36 /* Initialize the protocol and registered fields */
37 static int asap_tap = -1;
38 static int proto_asap = -1;
39 static int hf_cause_code = -1;
40 static int hf_cause_length = -1;
41 static int hf_cause_info = -1;
42 static int hf_cause_padding = -1;
43 static int hf_message_type = -1;
44 static int hf_message_flags = -1;
45 static int hf_message_length = -1;
46 static int hf_parameter_type = -1;
47 static int hf_parameter_length = -1;
48 static int hf_parameter_value = -1;
49 static int hf_parameter_padding = -1;
50 static int hf_parameter_ipv4_address = -1;
51 static int hf_parameter_ipv6_address = -1;
52 static int hf_dccp_port = -1;
53 static int hf_dccp_reserved = -1;
54 static int hf_dccp_service_code = -1;
55 static int hf_sctp_port = -1;
56 static int hf_transport_use = -1;
57 static int hf_tcp_port = -1;
58 static int hf_udp_port = -1;
59 static int hf_udp_reserved = -1;
60 static int hf_udp_lite_port = -1;
61 static int hf_udp_lite_reserved = -1;
62 static int hf_policy_type = -1;
63 static int hf_policy_value = -1;
64 static int hf_policy_weight = -1;
65 static int hf_policy_priority = -1;
66 static int hf_policy_load = -1;
67 static int hf_policy_degradation = -1;
68 static int hf_policy_loaddpf = -1;
69 static int hf_policy_weightdpf = -1;
70 static int hf_policy_distance = -1;
71 static int hf_pool_handle = -1;
72 static int hf_pe_pe_identifier = -1;
73 static int hf_home_enrp_id = -1;
74 static int hf_reg_life = -1;
75 static int hf_server_identifier = -1;
76 static int hf_cookie = -1;
77 static int hf_pe_identifier = -1;
78 static int hf_pe_checksum = -1;
79 static int hf_hropt_items = -1;
80 static int hf_home_enrp_server_bit = -1;
81 static int hf_reject_bit = -1;
82
83 /* Initialize the subtree pointers */
84 static gint ett_asap = -1;
85 static gint ett_asap_parameter = -1;
86 static gint ett_asap_cause = -1;
87 static gint ett_asap_flags = -1;
88
89 static guint64 asap_total_msgs = 0;
90 static guint64 asap_total_bytes = 0;
91
92 static void
93 dissect_parameters(tvbuff_t *, proto_tree *);
94 static void
95 dissect_parameter(tvbuff_t *, proto_tree *);
96 static int
97 dissect_asap(tvbuff_t *, packet_info *, proto_tree *, void *);
98
99 #define ASAP_UDP_PORT 3863
100 #define ASAP_TCP_PORT 3863
101 #define ASAP_SCTP_PORT 3863
102
103 typedef struct _asap_tap_rec_t {
104 guint8 type;
105 guint16 size;
106 const char* type_string;
107 } asap_tap_rec_t;
108
109 /* Dissectors for error causes. This is common for ASAP and ENRP. */
110
111 static void
dissect_unknown_cause(tvbuff_t * cause_tvb,proto_tree * cause_tree,proto_item * cause_item)112 dissect_unknown_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
113 {
114 guint16 code, length, cause_info_length;
115
116 code = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET);
117 length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
118 cause_info_length = length - CAUSE_HEADER_LENGTH;
119 if (cause_info_length > 0)
120 proto_tree_add_item(cause_tree, hf_cause_info, cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, ENC_NA);
121 proto_item_append_text(cause_item, " (code %u and %u byte%s information)", code, cause_info_length, plurality(cause_info_length, "", "s"));
122 }
123
124 static void
dissect_error_cause(tvbuff_t * cause_tvb,proto_tree * parameter_tree)125 dissect_error_cause(tvbuff_t *cause_tvb, proto_tree *parameter_tree)
126 {
127 guint16 code, length, padding_length;
128 proto_item *cause_item;
129 proto_tree *cause_tree;
130 tvbuff_t *parameter_tvb, *message_tvb;
131
132 code = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET);
133 length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
134 padding_length = tvb_reported_length(cause_tvb) - length;
135
136 cause_tree = proto_tree_add_subtree(parameter_tree, cause_tvb, CAUSE_HEADER_OFFSET, -1, ett_asap_cause, &cause_item,
137 val_to_str_const(code, cause_code_values, "Unknown error cause"));
138
139 proto_tree_add_item(cause_tree, hf_cause_code, cause_tvb, CAUSE_CODE_OFFSET, CAUSE_CODE_LENGTH, ENC_BIG_ENDIAN);
140 proto_tree_add_item(cause_tree, hf_cause_length, cause_tvb, CAUSE_LENGTH_OFFSET, CAUSE_LENGTH_LENGTH, ENC_BIG_ENDIAN);
141
142 switch(code) {
143 case UNRECOGNIZED_PARAMETER_CAUSE_CODE:
144 parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
145 dissect_parameter(parameter_tvb, cause_tree);
146 break;
147 case UNRECONGNIZED_MESSAGE_CAUSE_CODE:
148 message_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
149 dissect_asap(message_tvb, NULL, cause_tree, NULL);
150 break;
151 case INVALID_VALUES:
152 parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
153 dissect_parameter(parameter_tvb, cause_tree);
154 break;
155 case NON_UNIQUE_PE_IDENTIFIER:
156 break;
157 case POOLING_POLICY_INCONSISTENT_CAUSE_CODE:
158 parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
159 dissect_parameter(parameter_tvb, cause_tree);
160 break;
161 case LACK_OF_RESOURCES_CAUSE_CODE:
162 break;
163 case INCONSISTENT_TRANSPORT_TYPE_CAUSE_CODE:
164 parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
165 dissect_parameter(parameter_tvb, cause_tree);
166 break;
167 case INCONSISTENT_DATA_CONTROL_CONFIGURATION_CAUSE_CODE:
168 break;
169 case UNKNOWN_POOL_HANDLE:
170 break;
171 case REJECTION_DUE_TO_SECURITY_CAUSE_CODE:
172 break;
173 default:
174 dissect_unknown_cause(cause_tvb, cause_tree, cause_item);
175 break;
176 }
177 if (padding_length > 0)
178 proto_tree_add_item(cause_tree, hf_cause_padding, cause_tvb, CAUSE_HEADER_OFFSET + length, padding_length, ENC_NA);
179 }
180
181 static void
dissect_error_causes(tvbuff_t * error_causes_tvb,proto_tree * parameter_tree)182 dissect_error_causes(tvbuff_t *error_causes_tvb, proto_tree *parameter_tree)
183 {
184 guint16 length, total_length;
185 gint offset;
186 tvbuff_t *error_cause_tvb;
187
188 offset = 0;
189 while(tvb_reported_length_remaining(error_causes_tvb, offset) > 0) {
190 length = tvb_get_ntohs(error_causes_tvb, offset + CAUSE_LENGTH_OFFSET);
191 total_length = ADD_PADDING(length);
192 error_cause_tvb = tvb_new_subset_length(error_causes_tvb, offset , total_length);
193 dissect_error_cause(error_cause_tvb, parameter_tree);
194 offset += total_length;
195 }
196 }
197
198 /* Dissectors for parameters. This is common for ASAP and ENRP. */
199
200 static void
dissect_ipv4_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)201 dissect_ipv4_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
202 {
203 proto_tree_add_item(parameter_tree, hf_parameter_ipv4_address, parameter_tvb, IPV4_ADDRESS_OFFSET, IPV4_ADDRESS_LENGTH, ENC_BIG_ENDIAN);
204 proto_item_append_text(parameter_item, " (%s)", tvb_ip_to_str(wmem_packet_scope(), parameter_tvb, IPV4_ADDRESS_OFFSET));
205 }
206
207 static void
dissect_ipv6_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)208 dissect_ipv6_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
209 {
210 proto_tree_add_item(parameter_tree, hf_parameter_ipv6_address, parameter_tvb, IPV6_ADDRESS_OFFSET, IPV6_ADDRESS_LENGTH, ENC_NA);
211 proto_item_append_text(parameter_item, " (%s)", tvb_ip6_to_str(wmem_packet_scope(), parameter_tvb, IPV6_ADDRESS_OFFSET));
212 }
213
214 static void
dissect_dccp_transport_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)215 dissect_dccp_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
216 {
217 tvbuff_t *parameters_tvb;
218
219 proto_tree_add_item(parameter_tree, hf_dccp_port, parameter_tvb, DCCP_PORT_OFFSET, DCCP_PORT_LENGTH, ENC_BIG_ENDIAN);
220 proto_tree_add_item(parameter_tree, hf_dccp_reserved, parameter_tvb, DCCP_RESERVED_OFFSET, DCCP_RESERVED_LENGTH, ENC_BIG_ENDIAN);
221 proto_tree_add_item(parameter_tree, hf_dccp_service_code, parameter_tvb, DCCP_SERVICE_CODE_OFFSET, DCCP_SERVICE_CODE_LENGTH, ENC_BIG_ENDIAN);
222
223 parameters_tvb = tvb_new_subset_remaining(parameter_tvb, DCCP_ADDRESS_OFFSET);
224 dissect_parameters(parameters_tvb, parameter_tree);
225 }
226
227 static void
dissect_sctp_transport_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)228 dissect_sctp_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
229 {
230 tvbuff_t *parameters_tvb;
231
232 proto_tree_add_item(parameter_tree, hf_sctp_port, parameter_tvb, SCTP_PORT_OFFSET, SCTP_PORT_LENGTH, ENC_BIG_ENDIAN);
233 proto_tree_add_item(parameter_tree, hf_transport_use, parameter_tvb, SCTP_TRANSPORT_USE_OFFSET, SCTP_TRANSPORT_USE_LENGTH, ENC_BIG_ENDIAN);
234
235 parameters_tvb = tvb_new_subset_remaining(parameter_tvb, SCTP_ADDRESS_OFFSET);
236 dissect_parameters(parameters_tvb, parameter_tree);
237 }
238
239 static void
dissect_tcp_transport_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)240 dissect_tcp_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
241 {
242 tvbuff_t *parameters_tvb;
243
244 proto_tree_add_item(parameter_tree, hf_tcp_port, parameter_tvb, TCP_PORT_OFFSET, TCP_PORT_LENGTH, ENC_BIG_ENDIAN);
245 proto_tree_add_item(parameter_tree, hf_transport_use, parameter_tvb, TCP_TRANSPORT_USE_OFFSET, TCP_TRANSPORT_USE_LENGTH, ENC_BIG_ENDIAN);
246
247 parameters_tvb = tvb_new_subset_remaining(parameter_tvb, TCP_ADDRESS_OFFSET);
248 dissect_parameters(parameters_tvb, parameter_tree);
249 }
250
251 static void
dissect_udp_transport_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)252 dissect_udp_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
253 {
254 tvbuff_t *parameters_tvb;
255
256 proto_tree_add_item(parameter_tree, hf_udp_port, parameter_tvb, UDP_PORT_OFFSET, UDP_PORT_LENGTH, ENC_BIG_ENDIAN);
257 proto_tree_add_item(parameter_tree, hf_udp_reserved, parameter_tvb, UDP_RESERVED_OFFSET, UDP_RESERVED_LENGTH, ENC_BIG_ENDIAN);
258
259 parameters_tvb = tvb_new_subset_remaining(parameter_tvb, UDP_ADDRESS_OFFSET);
260 dissect_parameters(parameters_tvb, parameter_tree);
261 }
262
263 static void
dissect_udp_lite_transport_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)264 dissect_udp_lite_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
265 {
266 tvbuff_t *parameters_tvb;
267
268 proto_tree_add_item(parameter_tree, hf_udp_lite_port, parameter_tvb, UDP_LITE_PORT_OFFSET, UDP_LITE_PORT_LENGTH, ENC_BIG_ENDIAN);
269 proto_tree_add_item(parameter_tree, hf_udp_lite_reserved, parameter_tvb, UDP_LITE_RESERVED_OFFSET, UDP_LITE_RESERVED_LENGTH, ENC_BIG_ENDIAN);
270
271 parameters_tvb = tvb_new_subset_remaining(parameter_tvb, UDP_LITE_ADDRESS_OFFSET);
272 dissect_parameters(parameters_tvb, parameter_tree);
273 }
274
275 static void
dissect_pool_member_selection_policy_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)276 dissect_pool_member_selection_policy_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
277 {
278 guint32 type;
279 guint length;
280
281 proto_tree_add_item(parameter_tree, hf_policy_type, parameter_tvb, POLICY_TYPE_OFFSET, POLICY_TYPE_LENGTH, ENC_BIG_ENDIAN);
282 type = tvb_get_ntohl(parameter_tvb, POLICY_TYPE_OFFSET);
283 switch (type) {
284 case RANDOM_POLICY:
285 case ROUND_ROBIN_POLICY:
286 break;
287 case WEIGHTED_RANDOM_POLICY:
288 case WEIGHTED_ROUND_ROBIN_POLICY:
289 proto_tree_add_item(parameter_tree, hf_policy_weight, parameter_tvb, POLICY_WEIGHT_OFFSET, POLICY_WEIGHT_LENGTH, ENC_BIG_ENDIAN);
290 break;
291 case PRIORITY_POLICY:
292 proto_tree_add_item(parameter_tree, hf_policy_priority, parameter_tvb, POLICY_PRIORITY_OFFSET, POLICY_PRIORITY_LENGTH, ENC_BIG_ENDIAN);
293 break;
294 case LEAST_USED_POLICY:
295 case RANDOMIZED_LEAST_USED_POLICY:
296 proto_tree_add_double_format_value(parameter_tree, hf_policy_load, parameter_tvb, POLICY_LOAD_OFFSET, POLICY_LOAD_LENGTH,
297 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff, "%1.2f%%",
298 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff);
299 break;
300 case LEAST_USED_WITH_DEG_POLICY:
301 case PRIORITY_LEAST_USED_POLICY:
302 proto_tree_add_double_format_value(parameter_tree, hf_policy_load, parameter_tvb, POLICY_LOAD_OFFSET, POLICY_LOAD_LENGTH,
303 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff, "%1.2f%%",
304 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff);
305 proto_tree_add_double_format_value(parameter_tree, hf_policy_degradation, parameter_tvb, POLICY_DEGRADATION_OFFSET, POLICY_DEGRADATION_LENGTH,
306 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_DEGRADATION_OFFSET) / (double)0xffffffff, "%1.2f%%",
307 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_DEGRADATION_OFFSET) / (double)0xffffffff);
308 break;
309 case LEAST_USED_DPF_POLICY:
310 proto_tree_add_double_format_value(parameter_tree, hf_policy_load, parameter_tvb, POLICY_LOAD_OFFSET, POLICY_LOAD_LENGTH,
311 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff, "%1.2f%%",
312 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff);
313 proto_tree_add_double_format_value(parameter_tree, hf_policy_loaddpf, parameter_tvb, POLICY_LUDPF_LOADDPF_OFFSET, POLICY_LUDPF_LOADDPF_LENGTH,
314 tvb_get_ntohl(parameter_tvb, POLICY_LUDPF_LOADDPF_OFFSET) / (double)0xffffffff, "%1.5f",
315 tvb_get_ntohl(parameter_tvb, POLICY_LUDPF_LOADDPF_OFFSET) / (double)0xffffffff);
316 proto_tree_add_item(parameter_tree, hf_policy_distance, parameter_tvb, POLICY_LUDPF_DISTANCE_OFFSET, POLICY_LUDPF_DISTANCE_LENGTH, ENC_BIG_ENDIAN);
317 break;
318 case WEIGHTED_RANDOM_DPF_POLICY:
319 proto_tree_add_item(parameter_tree, hf_policy_weight, parameter_tvb, POLICY_WEIGHT_OFFSET, POLICY_WEIGHT_LENGTH, ENC_BIG_ENDIAN);
320 proto_tree_add_double_format_value(parameter_tree, hf_policy_weightdpf, parameter_tvb, POLICY_WRANDDPF_WEIGHTDPF_OFFSET, POLICY_WRANDDPF_WEIGHTDPF_LENGTH,
321 tvb_get_ntohl(parameter_tvb, POLICY_WRANDDPF_WEIGHTDPF_OFFSET) / (double)0xffffffff, "%1.5f",
322 tvb_get_ntohl(parameter_tvb, POLICY_WRANDDPF_WEIGHTDPF_OFFSET) / (double)0xffffffff);
323 proto_tree_add_item(parameter_tree, hf_policy_distance, parameter_tvb, POLICY_WRANDDPF_DISTANCE_OFFSET, POLICY_WRANDDPF_DISTANCE_LENGTH, ENC_BIG_ENDIAN);
324 break;
325 default:
326 length = tvb_reported_length(parameter_tvb) - POLICY_VALUE_OFFSET;
327 if (length > 0) {
328 proto_tree_add_item(parameter_tree, hf_policy_value, parameter_tvb, POLICY_VALUE_OFFSET, length, ENC_NA);
329 }
330 break;
331 }
332 }
333
334 static void
dissect_pool_handle_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)335 dissect_pool_handle_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
336 {
337 guint16 handle_length;
338 proto_item* pi;
339
340 handle_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
341 pi = proto_tree_add_item(parameter_tree, hf_pool_handle, parameter_tvb, POOL_HANDLE_OFFSET, handle_length, ENC_NA);
342
343 proto_item_append_text(pi, " (%s)",
344 tvb_format_text(wmem_packet_scope(), parameter_tvb, POOL_HANDLE_OFFSET, handle_length));
345 }
346
347 static void
dissect_pool_element_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)348 dissect_pool_element_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
349 {
350 tvbuff_t* parameters_tvb;
351
352 proto_tree_add_item(parameter_tree, hf_pe_pe_identifier, parameter_tvb, PE_PE_IDENTIFIER_OFFSET, PE_PE_IDENTIFIER_LENGTH, ENC_BIG_ENDIAN);
353 proto_tree_add_item(parameter_tree, hf_home_enrp_id, parameter_tvb, HOME_ENRP_INDENTIFIER_OFFSET, HOME_ENRP_INDENTIFIER_LENGTH, ENC_BIG_ENDIAN);
354 proto_tree_add_item(parameter_tree, hf_reg_life, parameter_tvb, REGISTRATION_LIFE_OFFSET, REGISTRATION_LIFE_LENGTH, ENC_BIG_ENDIAN);
355
356 parameters_tvb = tvb_new_subset_remaining(parameter_tvb, USER_TRANSPORT_PARAMETER_OFFSET);
357 dissect_parameters(parameters_tvb, parameter_tree);
358 }
359
360 static void
dissect_server_information_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)361 dissect_server_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
362 {
363 tvbuff_t *parameters_tvb;
364
365 proto_tree_add_item(parameter_tree, hf_server_identifier, parameter_tvb, SERVER_ID_OFFSET, SERVER_ID_LENGTH, ENC_BIG_ENDIAN);
366
367 parameters_tvb = tvb_new_subset_remaining(parameter_tvb, SERVER_TRANSPORT_OFFSET);
368 dissect_parameters(parameters_tvb, parameter_tree);
369 }
370
371 static void
dissect_operation_error_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)372 dissect_operation_error_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
373 {
374 tvbuff_t *error_causes_tvb;
375
376 error_causes_tvb = tvb_new_subset_remaining(parameter_tvb, ERROR_CAUSES_OFFSET);
377 dissect_error_causes(error_causes_tvb, parameter_tree);
378 }
379
380 static void
dissect_cookie_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)381 dissect_cookie_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
382 {
383 guint16 cookie_length;
384
385 cookie_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
386 if (cookie_length > 0)
387 proto_tree_add_item(parameter_tree, hf_cookie, parameter_tvb, COOKIE_OFFSET, cookie_length, ENC_NA);
388 proto_item_append_text(parameter_item, " (%u byte%s)", cookie_length, plurality(cookie_length, "", "s"));
389 }
390
391 static void
dissect_pe_identifier_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)392 dissect_pe_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
393 {
394 proto_tree_add_item(parameter_tree, hf_pe_identifier, parameter_tvb, PE_IDENTIFIER_OFFSET, PE_IDENTIFIER_LENGTH, ENC_BIG_ENDIAN);
395 proto_item_append_text(parameter_item, " (0x%x)", tvb_get_ntohl(parameter_tvb, PE_IDENTIFIER_OFFSET));
396 }
397
398 static void
dissect_pe_checksum_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)399 dissect_pe_checksum_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
400 {
401 proto_tree_add_checksum(parameter_tree, parameter_tvb, PE_CHECKSUM_OFFSET, hf_pe_checksum, -1, NULL, NULL, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
402 proto_item_append_text(parameter_item, " (0x%x)", tvb_get_ntohs(parameter_tvb, PE_CHECKSUM_OFFSET));
403 }
404
405 static void
dissect_handle_resolution_option_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)406 dissect_handle_resolution_option_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
407 {
408 proto_tree_add_item(parameter_tree, hf_hropt_items, parameter_tvb, HROPT_ITEMS_OFFSET, HROPT_ITEMS_LENGTH, ENC_BIG_ENDIAN);
409 }
410
411 static void
dissect_unknown_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)412 dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
413 {
414 guint16 type, parameter_value_length;
415
416 type = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
417 parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
418
419 if (parameter_value_length > 0)
420 proto_tree_add_item(parameter_tree, hf_parameter_value, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, ENC_NA);
421
422 proto_item_append_text(parameter_item, " (type %u and %u byte%s value)", type, parameter_value_length, plurality(parameter_value_length, "", "s"));
423 }
424
425 static void
dissect_parameter(tvbuff_t * parameter_tvb,proto_tree * asap_tree)426 dissect_parameter(tvbuff_t *parameter_tvb, proto_tree *asap_tree)
427 {
428 guint16 type, length, padding_length;
429 proto_item *parameter_item;
430 proto_tree *parameter_tree;
431
432 /* extract tag and length from the parameter */
433 type = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
434 length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
435 padding_length = tvb_reported_length(parameter_tvb) - length;
436
437 /* create proto_tree stuff */
438 parameter_tree = proto_tree_add_subtree(asap_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, -1,
439 ett_asap_parameter, ¶meter_item, val_to_str_const(type, parameter_type_values, "Unknown Parameter"));
440
441 /* add tag and length to the asap tree */
442 proto_tree_add_item(parameter_tree, hf_parameter_type, parameter_tvb, PARAMETER_TYPE_OFFSET, PARAMETER_TYPE_LENGTH, ENC_BIG_ENDIAN);
443 proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, ENC_BIG_ENDIAN);
444
445 switch(type) {
446 case IPV4_ADDRESS_PARAMETER_TYPE:
447 dissect_ipv4_parameter(parameter_tvb, parameter_tree, parameter_item);
448 break;
449 case IPV6_ADDRESS_PARAMETER_TYPE:
450 dissect_ipv6_parameter(parameter_tvb, parameter_tree, parameter_item);
451 break;
452 case DCCP_TRANSPORT_PARAMETER_TYPE:
453 dissect_dccp_transport_parameter(parameter_tvb, parameter_tree);
454 break;
455 case SCTP_TRANSPORT_PARAMETER_TYPE:
456 dissect_sctp_transport_parameter(parameter_tvb, parameter_tree);
457 break;
458 case TCP_TRANSPORT_PARAMETER_TYPE:
459 dissect_tcp_transport_parameter(parameter_tvb, parameter_tree);
460 break;
461 case UDP_TRANSPORT_PARAMETER_TYPE:
462 dissect_udp_transport_parameter(parameter_tvb, parameter_tree);
463 break;
464 case UDP_LITE_TRANSPORT_PARAMETER_TYPE:
465 dissect_udp_lite_transport_parameter(parameter_tvb, parameter_tree);
466 break;
467 case POOL_MEMBER_SELECTION_POLICY_PARAMETER_TYPE:
468 dissect_pool_member_selection_policy_parameter(parameter_tvb, parameter_tree);
469 break;
470 case POOL_HANDLE_PARAMETER_TYPE:
471 dissect_pool_handle_parameter(parameter_tvb, parameter_tree);
472 break;
473 case POOL_ELEMENT_PARAMETER_TYPE:
474 dissect_pool_element_parameter(parameter_tvb, parameter_tree);
475 break;
476 case SERVER_INFORMATION_PARAMETER_TYPE:
477 dissect_server_information_parameter(parameter_tvb, parameter_tree);
478 break;
479 case OPERATION_ERROR_PARAMETER_TYPE:
480 dissect_operation_error_parameter(parameter_tvb, parameter_tree);
481 break;
482 case COOKIE_PARAMETER_TYPE:
483 dissect_cookie_parameter(parameter_tvb, parameter_tree, parameter_item);
484 break;
485 case PE_IDENTIFIER_PARAMETER_TYPE:
486 dissect_pe_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
487 break;
488 case PE_CHECKSUM_PARAMETER_TYPE:
489 dissect_pe_checksum_parameter(parameter_tvb, parameter_tree, parameter_item);
490 break;
491 case HANDLE_RESOLUTION_OPTION_PARAMETER_TYPE:
492 dissect_handle_resolution_option_parameter(parameter_tvb, parameter_tree);
493 break;
494 default:
495 dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
496 break;
497 };
498
499 if (padding_length > 0)
500 proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, ENC_NA);
501 }
502
503 static void
dissect_parameters(tvbuff_t * parameters_tvb,proto_tree * tree)504 dissect_parameters(tvbuff_t *parameters_tvb, proto_tree *tree)
505 {
506 gint offset, length, total_length, remaining_length;
507 tvbuff_t *parameter_tvb;
508
509 offset = 0;
510 while((remaining_length = tvb_reported_length_remaining(parameters_tvb, offset)) > 0) {
511 length = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
512 total_length = ADD_PADDING(length);
513 if (remaining_length >= length)
514 total_length = MIN(total_length, remaining_length);
515 /* create a tvb for the parameter including the padding bytes */
516 parameter_tvb = tvb_new_subset_length(parameters_tvb, offset, total_length);
517 dissect_parameter(parameter_tvb, tree);
518 /* get rid of the handled parameter */
519 offset += total_length;
520 }
521 }
522
523 /* Dissectors for messages. This is specific to ASAP */
524
525 #define REGISTRATION_MESSAGE_TYPE 0x01
526 #define DEREGISTRATION_MESSAGE_TYPE 0x02
527 #define REGISTRATION_RESPONSE_MESSAGE_TYPE 0x03
528 #define DEREGISTRATION_RESPONSE_MESSAGE_TYPE 0x04
529 #define HANDLE_RESOLUTION_MESSAGE_TYPE 0x05
530 #define HANDLE_RESOLUTION_RESPONSE_MESSAGE_TYPE 0x06
531 #define ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE 0x07
532 #define ENDPOINT_KEEP_ALIVE_ACK_MESSAGE_TYPE 0x08
533 #define ENDPOINT_UNREACHABLE_MESSAGE_TYPE 0x09
534 #define SERVER_ANNOUNCE_MESSAGE_TYPE 0x0a
535 #define COOKIE_MESSAGE_TYPE 0x0b
536 #define COOKIE_ECHO_MESSAGE_TYPE 0x0c
537 #define BUSINESS_CARD_MESSAGE_TYPE 0x0d
538 #define ERROR_MESSAGE_TYPE 0x0e
539
540 static const value_string message_type_values[] = {
541 { REGISTRATION_MESSAGE_TYPE, "ASAP Registration" },
542 { DEREGISTRATION_MESSAGE_TYPE, "ASAP Deregistration" },
543 { REGISTRATION_RESPONSE_MESSAGE_TYPE, "ASAP Registration Response" },
544 { DEREGISTRATION_RESPONSE_MESSAGE_TYPE, "ASAP Deregistration Response" },
545 { HANDLE_RESOLUTION_MESSAGE_TYPE, "ASAP Handle Resolution" },
546 { HANDLE_RESOLUTION_RESPONSE_MESSAGE_TYPE, "ASAP Handle Resolution Response" },
547 { ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE, "ASAP Endpoint Keep-Alive" },
548 { ENDPOINT_KEEP_ALIVE_ACK_MESSAGE_TYPE, "ASAP Endpoint Keep-Alive Acknowledgement" },
549 { ENDPOINT_UNREACHABLE_MESSAGE_TYPE, "ASAP Endpoint Unreachable" },
550 { SERVER_ANNOUNCE_MESSAGE_TYPE, "ASAP Server Announce" },
551 { COOKIE_MESSAGE_TYPE, "ASAP Cookie" },
552 { COOKIE_ECHO_MESSAGE_TYPE, "ASAP Cookie Echo" },
553 { BUSINESS_CARD_MESSAGE_TYPE, "ASAP Business Card" },
554 { ERROR_MESSAGE_TYPE, "ASAP Error" },
555 { 0, NULL } };
556
557 #define SERVER_IDENTIFIER_OFFSET MESSAGE_VALUE_OFFSET
558 #define SERVER_IDENTIFIER_LENGTH 4
559
560 #define HOME_ENRP_SERVER_BIT_MASK 0x01
561 #define REJECT_BIT_MASK 0x01
562
563 static const true_false_string home_enrp_server_bit_value = {
564 "Want to be new ENRP server",
565 "Do not want to be new ENRP server"
566 };
567
568 static const true_false_string reject_bit_value = {
569 "Rejected",
570 "Accepted"
571 };
572
573 static void
dissect_asap_message(tvbuff_t * message_tvb,packet_info * pinfo,proto_tree * asap_tree)574 dissect_asap_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *asap_tree)
575 {
576 asap_tap_rec_t *tap_rec;
577 tvbuff_t *parameters_tvb;
578 proto_item *flags_item;
579 proto_tree *flags_tree;
580 guint8 type;
581
582 type = tvb_get_guint8(message_tvb, MESSAGE_TYPE_OFFSET);
583 /* pinfo is NULL only if dissect_asap_message is called via dissect_error_cause */
584 if (pinfo) {
585 tap_rec = wmem_new0(pinfo->pool, asap_tap_rec_t);
586 tap_rec->type = type;
587 tap_rec->size = tvb_get_ntohs(message_tvb, MESSAGE_LENGTH_OFFSET);
588 tap_rec->type_string = val_to_str_const(tap_rec->type, message_type_values, "Unknown ASAP type");
589 tap_queue_packet(asap_tap, pinfo, tap_rec);
590
591 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(type, message_type_values, "Unknown ASAP type"));
592 }
593
594 if (asap_tree) {
595 proto_tree_add_item(asap_tree, hf_message_type, message_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, ENC_BIG_ENDIAN);
596 flags_item = proto_tree_add_item(asap_tree, hf_message_flags, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
597 flags_tree = proto_item_add_subtree(flags_item, ett_asap_flags);
598 if (type == REGISTRATION_RESPONSE_MESSAGE_TYPE) {
599 proto_tree_add_item(flags_tree, hf_reject_bit, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
600 }
601 if (type == ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE) {
602 proto_tree_add_item(flags_tree, hf_home_enrp_server_bit, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
603 }
604 proto_tree_add_item(asap_tree, hf_message_length, message_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, ENC_BIG_ENDIAN);
605 if ((type == SERVER_ANNOUNCE_MESSAGE_TYPE) || (type == ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE)) {
606 proto_tree_add_item(asap_tree, hf_server_identifier, message_tvb, SERVER_IDENTIFIER_OFFSET, SERVER_IDENTIFIER_LENGTH, ENC_BIG_ENDIAN);
607 parameters_tvb = tvb_new_subset_remaining(message_tvb, MESSAGE_VALUE_OFFSET + SERVER_IDENTIFIER_LENGTH);
608 } else {
609 parameters_tvb = tvb_new_subset_remaining(message_tvb, MESSAGE_VALUE_OFFSET);
610 }
611 dissect_parameters(parameters_tvb, asap_tree);
612 }
613 }
614
615 static int
dissect_asap(tvbuff_t * message_tvb,packet_info * pinfo,proto_tree * tree,void * data _U_)616 dissect_asap(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
617 {
618 proto_item *asap_item;
619 proto_tree *asap_tree;
620
621 /* pinfo is NULL only if dissect_asap is called from dissect_error_cause */
622 if (pinfo)
623 col_set_str(pinfo->cinfo, COL_PROTOCOL, "ASAP");
624
625 /* create the asap protocol tree */
626 asap_item = proto_tree_add_item(tree, proto_asap, message_tvb, 0, -1, ENC_NA);
627 asap_tree = proto_item_add_subtree(asap_item, ett_asap);
628
629 /* dissect the message */
630 dissect_asap_message(message_tvb, pinfo, asap_tree);
631 return tvb_captured_length(message_tvb);
632 }
633
634 /* TAP STAT INFO */
635 typedef enum
636 {
637 MESSAGE_TYPE_COLUMN = 0,
638 MESSAGES_COLUMN,
639 MESSAGES_SHARE_COLUMN,
640 BYTES_COLUMN,
641 BYTES_SHARE_COLUMN,
642 FIRST_SEEN_COLUMN,
643 LAST_SEEN_COLUMN,
644 INTERVAL_COLUMN,
645 MESSAGE_RATE_COLUMN,
646 BYTE_RATE_COLUMN
647 } asap_stat_columns;
648
649 static stat_tap_table_item asap_stat_fields[] = {
650 { TABLE_ITEM_STRING, TAP_ALIGN_LEFT, "ASAP Message Type", "%-25s" },
651 { TABLE_ITEM_UINT, TAP_ALIGN_RIGHT, "Messages ", "%u" },
652 { TABLE_ITEM_UINT, TAP_ALIGN_RIGHT, "Messages Share (%)" , "%1.3f %%" },
653 { TABLE_ITEM_UINT, TAP_ALIGN_RIGHT, "Bytes (B)", "%u" },
654 { TABLE_ITEM_UINT, TAP_ALIGN_RIGHT, "Bytes Share (%) ", "%1.3f %%" },
655 { TABLE_ITEM_FLOAT, TAP_ALIGN_LEFT, "First Seen (s)", "%1.6f" },
656 { TABLE_ITEM_FLOAT, TAP_ALIGN_LEFT, "Last Seen (s)", "%1.6f" },
657 { TABLE_ITEM_FLOAT, TAP_ALIGN_LEFT, "Interval (s)", "%1.6f" },
658 { TABLE_ITEM_FLOAT, TAP_ALIGN_LEFT, "Message Rate (Msg/s)", "%1.2f" },
659 { TABLE_ITEM_FLOAT, TAP_ALIGN_LEFT, "Byte Rate (B/s)", "%1.2f" }
660 };
661
asap_stat_init(stat_tap_table_ui * new_stat)662 static void asap_stat_init(stat_tap_table_ui* new_stat)
663 {
664 const char *table_name = "ASAP Statistics";
665 int num_fields = sizeof(asap_stat_fields)/sizeof(stat_tap_table_item);
666 stat_tap_table *table;
667 int i = 0;
668 stat_tap_table_item_type items[sizeof(asap_stat_fields)/sizeof(stat_tap_table_item)];
669
670 table = stat_tap_find_table(new_stat, table_name);
671 if (table) {
672 if (new_stat->stat_tap_reset_table_cb) {
673 new_stat->stat_tap_reset_table_cb(table);
674 }
675 return;
676 }
677
678 table = stat_tap_init_table(table_name, num_fields, 0, NULL);
679 stat_tap_add_table(new_stat, table);
680
681 /* Add a row for each value type */
682 while (message_type_values[i].strptr) {
683 items[MESSAGE_TYPE_COLUMN].type = TABLE_ITEM_STRING;
684 items[MESSAGE_TYPE_COLUMN].value.string_value = message_type_values[i].strptr;
685 items[MESSAGES_COLUMN].type = TABLE_ITEM_UINT;
686 items[MESSAGES_COLUMN].value.uint_value = 0;
687 items[MESSAGES_SHARE_COLUMN].type = TABLE_ITEM_NONE;
688 items[MESSAGES_SHARE_COLUMN].value.float_value = -1.0;
689 items[BYTES_COLUMN].type = TABLE_ITEM_UINT;
690 items[BYTES_COLUMN].value.uint_value = 0;
691 items[BYTES_SHARE_COLUMN].type = TABLE_ITEM_NONE;
692 items[BYTES_SHARE_COLUMN].value.float_value = -1.0;
693 items[FIRST_SEEN_COLUMN].type = TABLE_ITEM_NONE;
694 items[FIRST_SEEN_COLUMN].value.float_value = DBL_MAX;
695 items[LAST_SEEN_COLUMN].type = TABLE_ITEM_NONE;
696 items[LAST_SEEN_COLUMN].value.float_value = DBL_MIN;
697 items[INTERVAL_COLUMN].type = TABLE_ITEM_NONE;
698 items[INTERVAL_COLUMN].value.float_value = -1.0;
699 items[MESSAGE_RATE_COLUMN].type = TABLE_ITEM_NONE;
700 items[MESSAGE_RATE_COLUMN].value.float_value = -1.0;
701 items[BYTE_RATE_COLUMN].type = TABLE_ITEM_NONE;
702 items[BYTE_RATE_COLUMN].value.float_value = -1.0;
703 stat_tap_init_table_row(table, i, num_fields, items);
704 i++;
705 }
706 }
707
708 static tap_packet_status
asap_stat_packet(void * tapdata,packet_info * pinfo _U_,epan_dissect_t * edt _U_,const void * data)709 asap_stat_packet(void* tapdata, packet_info* pinfo _U_, epan_dissect_t* edt _U_, const void* data)
710 {
711 stat_data_t* stat_data = (stat_data_t*)tapdata;
712 const asap_tap_rec_t* tap_rec = (const asap_tap_rec_t*)data;
713 stat_tap_table* table;
714 stat_tap_table_item_type* msg_data;
715 gint idx;
716 guint64 messages;
717 guint64 bytes;
718 int i = 0;
719 double firstSeen = -1.0;
720 double lastSeen = -1.0;
721
722 idx = str_to_val_idx(tap_rec->type_string, message_type_values);
723 if (idx < 0)
724 return TAP_PACKET_DONT_REDRAW;
725
726 table = g_array_index(stat_data->stat_tap_data->tables, stat_tap_table*, 0);
727
728 /* Update packets counter */
729 asap_total_msgs++;
730 msg_data = stat_tap_get_field_data(table, idx, MESSAGES_COLUMN);
731 msg_data->value.uint_value++;
732 messages = msg_data->value.uint_value;
733 stat_tap_set_field_data(table, idx, MESSAGES_COLUMN, msg_data);
734
735 /* Update bytes counter */
736 asap_total_bytes += tap_rec->size;
737 msg_data = stat_tap_get_field_data(table, idx, BYTES_COLUMN);
738 msg_data->value.uint_value += tap_rec->size;
739 bytes = msg_data->value.uint_value;
740 stat_tap_set_field_data(table, idx, BYTES_COLUMN, msg_data);
741
742 /* Update messages and bytes share */
743 while (message_type_values[i].strptr) {
744 msg_data = stat_tap_get_field_data(table, i, MESSAGES_COLUMN);
745 const guint m = msg_data->value.uint_value;
746 msg_data = stat_tap_get_field_data(table, i, BYTES_COLUMN);
747 const guint b = msg_data->value.uint_value;
748
749 msg_data = stat_tap_get_field_data(table, i, MESSAGES_SHARE_COLUMN);
750 msg_data->type = TABLE_ITEM_FLOAT;
751 msg_data->value.float_value = 100.0 * m / (double)asap_total_msgs;
752 stat_tap_set_field_data(table, i, MESSAGES_SHARE_COLUMN, msg_data);
753
754 msg_data = stat_tap_get_field_data(table, i, BYTES_SHARE_COLUMN);
755 msg_data->type = TABLE_ITEM_FLOAT;
756 msg_data->value.float_value = 100.0 * b / (double)asap_total_bytes;
757 stat_tap_set_field_data(table, i, BYTES_SHARE_COLUMN, msg_data);
758 i++;
759 }
760
761 /* Update first seen time */
762 if (pinfo->presence_flags & PINFO_HAS_TS) {
763 msg_data = stat_tap_get_field_data(table, idx, FIRST_SEEN_COLUMN);
764 msg_data->type = TABLE_ITEM_FLOAT;
765 msg_data->value.float_value = MIN(msg_data->value.float_value, nstime_to_sec(&pinfo->rel_ts));
766 firstSeen = msg_data->value.float_value;
767 stat_tap_set_field_data(table, idx, FIRST_SEEN_COLUMN, msg_data);
768 }
769
770 /* Update last seen time */
771 if (pinfo->presence_flags & PINFO_HAS_TS) {
772 msg_data = stat_tap_get_field_data(table, idx, LAST_SEEN_COLUMN);
773 msg_data->type = TABLE_ITEM_FLOAT;
774 msg_data->value.float_value = MAX(msg_data->value.float_value, nstime_to_sec(&pinfo->rel_ts));
775 lastSeen = msg_data->value.float_value;
776 stat_tap_set_field_data(table, idx, LAST_SEEN_COLUMN, msg_data);
777 }
778
779 if ((lastSeen - firstSeen) > 0.0) {
780 /* Update interval */
781 msg_data = stat_tap_get_field_data(table, idx, INTERVAL_COLUMN);
782 msg_data->type = TABLE_ITEM_FLOAT;
783 msg_data->value.float_value = lastSeen - firstSeen;
784 stat_tap_set_field_data(table, idx, INTERVAL_COLUMN, msg_data);
785
786 /* Update message rate */
787 msg_data = stat_tap_get_field_data(table, idx, MESSAGE_RATE_COLUMN);
788 msg_data->type = TABLE_ITEM_FLOAT;
789 msg_data->value.float_value = messages / (lastSeen - firstSeen);
790 stat_tap_set_field_data(table, idx, MESSAGE_RATE_COLUMN, msg_data);
791
792 /* Update byte rate */
793 msg_data = stat_tap_get_field_data(table, idx, BYTE_RATE_COLUMN);
794 msg_data->type = TABLE_ITEM_FLOAT;
795 msg_data->value.float_value = bytes / (lastSeen - firstSeen);
796 stat_tap_set_field_data(table, idx, BYTE_RATE_COLUMN, msg_data);
797 }
798
799 return TAP_PACKET_REDRAW;
800 }
801
802 static void
asap_stat_reset(stat_tap_table * table)803 asap_stat_reset(stat_tap_table* table)
804 {
805 guint element;
806 stat_tap_table_item_type* item_data;
807
808 for (element = 0; element < table->num_elements; element++) {
809 item_data = stat_tap_get_field_data(table, element, MESSAGES_COLUMN);
810 item_data->value.uint_value = 0;
811 stat_tap_set_field_data(table, element, MESSAGES_COLUMN, item_data);
812
813 item_data = stat_tap_get_field_data(table, element, MESSAGES_SHARE_COLUMN);
814 item_data->type = TABLE_ITEM_NONE;
815 item_data->value.float_value = -1.0;
816 stat_tap_set_field_data(table, element, MESSAGES_SHARE_COLUMN, item_data);
817
818 item_data = stat_tap_get_field_data(table, element, BYTES_COLUMN);
819 item_data->value.uint_value = 0;
820 stat_tap_set_field_data(table, element, BYTES_COLUMN, item_data);
821
822 item_data = stat_tap_get_field_data(table, element, BYTES_SHARE_COLUMN);
823 item_data->type = TABLE_ITEM_NONE;
824 item_data->value.float_value = -1.0;
825 stat_tap_set_field_data(table, element, BYTES_SHARE_COLUMN, item_data);
826
827 item_data = stat_tap_get_field_data(table, element, FIRST_SEEN_COLUMN);
828 item_data->type = TABLE_ITEM_NONE;
829 item_data->value.float_value = DBL_MAX;
830 stat_tap_set_field_data(table, element, FIRST_SEEN_COLUMN, item_data);
831
832 item_data = stat_tap_get_field_data(table, element, LAST_SEEN_COLUMN);
833 item_data->type = TABLE_ITEM_NONE;
834 item_data->value.float_value = DBL_MIN;
835 stat_tap_set_field_data(table, element, LAST_SEEN_COLUMN, item_data);
836
837 item_data = stat_tap_get_field_data(table, element, INTERVAL_COLUMN);
838 item_data->type = TABLE_ITEM_NONE;
839 item_data->value.float_value = -1.0;
840 stat_tap_set_field_data(table, element, INTERVAL_COLUMN, item_data);
841
842 item_data = stat_tap_get_field_data(table, element, MESSAGE_RATE_COLUMN);
843 item_data->type = TABLE_ITEM_NONE;
844 item_data->value.float_value = -1.0;
845 stat_tap_set_field_data(table, element, MESSAGE_RATE_COLUMN, item_data);
846
847 item_data = stat_tap_get_field_data(table, element, BYTE_RATE_COLUMN);
848 item_data->type = TABLE_ITEM_NONE;
849 item_data->value.float_value = -1.0;
850 stat_tap_set_field_data(table, element, BYTE_RATE_COLUMN, item_data);
851 }
852 asap_total_msgs = 0;
853 asap_total_bytes = 0;
854 }
855
856 /* Register the protocol with Wireshark */
857 void
proto_register_asap(void)858 proto_register_asap(void)
859 {
860
861 /* Setup list of header fields */
862 static hf_register_info hf[] = {
863 { &hf_message_type, { "Type", "asap.message_type", FT_UINT8, BASE_DEC, VALS(message_type_values), 0x0, NULL, HFILL } },
864 { &hf_message_flags, { "Flags", "asap.message_flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } },
865 { &hf_message_length, { "Length", "asap.message_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
866 { &hf_cause_code, { "Cause Code", "asap.cause_code", FT_UINT16, BASE_HEX, VALS(cause_code_values), 0x0, NULL, HFILL } },
867 { &hf_cause_length, { "Cause Length", "asap.cause_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
868 { &hf_cause_info, { "Cause Info", "asap.cause_info", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
869 { &hf_cause_padding, { "Padding", "asap.cause_padding", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
870 { &hf_parameter_type, { "Parameter Type", "asap.parameter_type", FT_UINT16, BASE_HEX, VALS(parameter_type_values), 0x0, NULL, HFILL } },
871 { &hf_parameter_length, { "Parameter Length", "asap.parameter_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
872 { &hf_parameter_value, { "Parameter Value", "asap.parameter_value", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
873 { &hf_parameter_padding, { "Padding", "asap.parameter_padding", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
874 { &hf_parameter_ipv4_address, { "IP Version 4 Address", "asap.ipv4_address", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL } },
875 { &hf_parameter_ipv6_address, { "IP Version 6 Address", "asap.ipv6_address", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL } },
876 { &hf_dccp_port, { "Port", "asap.dccp_transport_port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
877 { &hf_dccp_reserved, { "Reserved", "asap.dccp_transport_reserved", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
878 { &hf_dccp_service_code, { "Service Code", "asap.dccp_transport_service_code", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
879 { &hf_sctp_port, { "Port", "asap.sctp_transport_port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
880 { &hf_transport_use, { "Transport Use", "asap.transport_use", FT_UINT16, BASE_DEC, VALS(transport_use_values), 0x0, NULL, HFILL } },
881 { &hf_tcp_port, { "Port", "asap.tcp_transport_port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
882 { &hf_udp_port, { "Port", "asap.udp_transport_port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
883 { &hf_udp_reserved, { "Reserved", "asap.udp_transport_reserved", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
884 { &hf_udp_lite_port, { "Port", "asap.udp_lite_transport_port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
885 { &hf_udp_lite_reserved, { "Reserved", "asap.udp_lite_transport_reserved", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
886 { &hf_policy_type, { "Policy Type", "asap.pool_member_selection_policy_type", FT_UINT32, BASE_HEX, VALS(policy_type_values), 0x0, NULL, HFILL } },
887 { &hf_policy_weight, { "Policy Weight", "asap.pool_member_selection_policy_weight", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
888 { &hf_policy_priority, { "Policy Priority", "asap.pool_member_selection_policy_priority", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
889 { &hf_policy_load, { "Policy Load", "asap.pool_member_selection_policy_load", FT_DOUBLE, BASE_NONE, NULL, 0x0, NULL, HFILL } },
890 { &hf_policy_degradation, { "Policy Degradation", "asap.pool_member_selection_policy_degradation", FT_DOUBLE, BASE_NONE, NULL, 0x0, NULL, HFILL } },
891 { &hf_policy_loaddpf, { "Policy Load DPF", "asap.pool_member_selection_policy_load_dpf", FT_DOUBLE, BASE_NONE, NULL, 0x0, NULL, HFILL } },
892 { &hf_policy_weightdpf, { "Policy Weight DPF", "asap.pool_member_selection_policy_weight_dpf", FT_DOUBLE, BASE_NONE, NULL, 0x0, NULL, HFILL } },
893 { &hf_policy_distance, { "Policy Distance", "asap.pool_member_selection_policy_distance", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
894 { &hf_policy_value, { "Policy Value", "asap.pool_member_selection_policy_value", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
895 { &hf_pool_handle, { "Pool Handle", "asap.pool_handle_pool_handle", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
896 { &hf_pe_pe_identifier, { "PE Identifier", "asap.pool_element_pe_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
897 { &hf_home_enrp_id, { "Home ENRP Server Identifier", "asap.pool_element_home_enrp_server_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
898 { &hf_reg_life, { "Registration Life", "asap.pool_element_registration_life", FT_INT32, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0, NULL, HFILL } },
899 { &hf_cookie, { "Cookie", "asap.cookie", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
900 { &hf_pe_identifier, { "PE Identifier", "asap.pe_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
901 { &hf_pe_checksum, { "PE Checksum", "asap.pe_checksum", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
902 { &hf_hropt_items, { "Items", "asap.hropt_items", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
903 { &hf_server_identifier, { "Server Identifier", "asap.server_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
904 { &hf_home_enrp_server_bit, { "H Bit", "asap.h_bit", FT_BOOLEAN, 8, TFS(&home_enrp_server_bit_value), HOME_ENRP_SERVER_BIT_MASK, NULL, HFILL } },
905 { &hf_reject_bit, { "R Bit", "asap.r_bit", FT_BOOLEAN, 8, TFS(&reject_bit_value), REJECT_BIT_MASK, NULL, HFILL } },
906 };
907
908 /* Setup protocol subtree array */
909 static gint *ett[] = {
910 &ett_asap,
911 &ett_asap_flags,
912 &ett_asap_parameter,
913 &ett_asap_cause,
914 };
915
916 static tap_param asap_stat_params[] = {
917 { PARAM_FILTER, "filter", "Filter", NULL, TRUE }
918 };
919
920 static stat_tap_table_ui asap_stat_table = {
921 REGISTER_STAT_GROUP_RSERPOOL,
922 "ASAP Statistics",
923 "asap",
924 "asap,stat",
925 asap_stat_init,
926 asap_stat_packet,
927 asap_stat_reset,
928 NULL,
929 NULL,
930 sizeof(asap_stat_fields)/sizeof(stat_tap_table_item), asap_stat_fields,
931 sizeof(asap_stat_params)/sizeof(tap_param), asap_stat_params,
932 NULL,
933 0
934 };
935
936 /* Register the protocol name and description */
937 proto_asap = proto_register_protocol("Aggregate Server Access Protocol", "ASAP", "asap");
938
939 /* Required function calls to register the header fields and subtrees used */
940 proto_register_field_array(proto_asap, hf, array_length(hf));
941 proto_register_subtree_array(ett, array_length(ett));
942 asap_tap = register_tap("asap");
943
944 register_stat_tap_table_ui(&asap_stat_table);
945 }
946
947 void
proto_reg_handoff_asap(void)948 proto_reg_handoff_asap(void)
949 {
950 dissector_handle_t asap_handle;
951
952 asap_handle = create_dissector_handle(dissect_asap, proto_asap);
953 dissector_add_uint("sctp.ppi", ASAP_PAYLOAD_PROTOCOL_ID, asap_handle);
954 dissector_add_uint_with_preference("udp.port", ASAP_UDP_PORT, asap_handle);
955 dissector_add_uint_with_preference("tcp.port", ASAP_TCP_PORT, asap_handle);
956 dissector_add_uint("sctp.port", ASAP_SCTP_PORT, asap_handle);
957 }
958
959 /*
960 * Editor modelines - https://www.wireshark.org/tools/modelines.html
961 *
962 * Local Variables:
963 * c-basic-offset: 2
964 * tab-width: 8
965 * indent-tabs-mode: nil
966 * End:
967 *
968 * ex: set shiftwidth=2 tabstop=8 expandtab:
969 * :indentSize=2:tabSize=8:noTabs=true:
970 */
971