2 * Routines for Aggregate Server Access Protocol
3 * It is hopefully (needs testing) compilant to
4 * http://www.ietf.org/internet-drafts/draft-ietf-rserpool-common-param-02.txt
5 * http://www.ietf.org/internet-drafts/draft-ietf-rserpool-asap-05.txt
7 * Copyright 2002, Michael Tuexen <tuexen [AT] fh-muenster.de>
9 * $Id: packet-asap.c,v 1.11 2003/12/21 05:51:32 jmayer Exp $
11 * Ethereal - Network traffic analyzer
12 * By Gerald Combs <gerald@ethereal.com>
13 * Copyright 1998 Gerald Combs
15 * Copied from README.developer
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version 2
20 * of the License, or (at your option) any later version.
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
36 #include <epan/packet.h>
37 #include "sctpppids.h"
39 /* Initialize the protocol and registered fields */
40 static int proto_asap = -1;
41 static int hf_cause_code = -1;
42 static int hf_cause_length = -1;
43 static int hf_cause_info = -1;
44 static int hf_cause_padding = -1;
45 static int hf_message_type = -1;
46 static int hf_message_flags = -1;
47 static int hf_message_length = -1;
48 static int hf_parameter_type = -1;
49 static int hf_parameter_length = -1;
50 static int hf_parameter_value = -1;
51 static int hf_parameter_padding = -1;
52 static int hf_parameter_ipv4_address = -1;
53 static int hf_parameter_ipv6_address = -1;
54 static int hf_sctp_port = -1;
55 static int hf_sctp_reserved = -1;
56 static int hf_tcp_port = -1;
57 static int hf_tcp_reserved = -1;
58 static int hf_udp_port = -1;
59 static int hf_udp_reserved = -1;
60 static int hf_policy_type = -1;
61 static int hf_policy_value = -1;
62 static int hf_pool_handle = -1;
63 static int hf_pe_pe_identifier = -1;
64 static int hf_home_enrp_id = -1;
65 static int hf_reg_life = -1;
66 static int hf_server_identifier = -1;
67 static int hf_m_bit = -1;
68 static int hf_reserved = -1;
69 static int hf_cookie = -1;
70 static int hf_pe_identifier = -1;
72 /* Initialize the subtree pointers */
73 static gint ett_asap = -1;
74 static gint ett_asap_parameter = -1;
75 static gint ett_asap_cause = -1;
78 dissect_parameters(tvbuff_t *, proto_tree *);
80 #define NETWORK_BYTE_ORDER FALSE
81 #define ADD_PADDING(x) ((((x) + 3) >> 2) << 2)
83 /* Dissectors for error causes */
84 #define CAUSE_CODE_LENGTH 2
85 #define CAUSE_LENGTH_LENGTH 2
86 #define CAUSE_HEADER_LENGTH (CAUSE_CODE_LENGTH + CAUSE_LENGTH_LENGTH)
88 #define CAUSE_HEADER_OFFSET 0
89 #define CAUSE_CODE_OFFSET CAUSE_HEADER_OFFSET
90 #define CAUSE_LENGTH_OFFSET (CAUSE_CODE_OFFSET + CAUSE_CODE_LENGTH)
91 #define CAUSE_INFO_OFFSET (CAUSE_LENGTH_OFFSET + CAUSE_LENGTH_LENGTH)
94 dissect_unknown_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
96 guint16 code, length, cause_info_length;
98 code = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET);
99 length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
100 cause_info_length = length - CAUSE_HEADER_LENGTH;
101 if (cause_info_length > 0)
102 proto_tree_add_bytes(cause_tree, hf_cause_info, cause_tvb, CAUSE_INFO_OFFSET, cause_info_length,
103 tvb_get_ptr(cause_tvb, CAUSE_INFO_OFFSET, cause_info_length));
104 proto_item_append_text(cause_item, " (code %u and %u byte%s information)", code, cause_info_length, plurality(cause_info_length, "", "s"));
107 #define UNRECOGNIZED_PARAMETER_CAUSE_CODE 1
108 #define UNRECONGNIZED_MESSAGE_CAUSE_CODE 2
109 #define INVALID_VALUES 3
110 #define NON_UNIQUE_PE_IDENTIFIER 4
111 #define POOLING_POLICY_INCONSISTENT_CAUSE_CODE 5
112 #define LACK_OF_RESOURCES_CAUSE_CODE 6
114 static const value_string cause_code_values[] = {
115 { UNRECOGNIZED_PARAMETER_CAUSE_CODE, "Unrecognized parameter" },
116 { UNRECONGNIZED_MESSAGE_CAUSE_CODE, "Unrecognized message" },
117 { INVALID_VALUES, "Invalid values" },
118 { NON_UNIQUE_PE_IDENTIFIER, "Non-unique PE identifier" },
119 { POOLING_POLICY_INCONSISTENT_CAUSE_CODE, "Pooling policy inconsistent" },
120 { LACK_OF_RESOURCES_CAUSE_CODE, "Lack of resources" },
124 dissect_error_cause(tvbuff_t *cause_tvb, proto_tree *parameter_tree)
126 guint16 code, length, padding_length;
127 proto_item *cause_item;
128 proto_tree *cause_tree;
130 code = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET);
131 length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
132 padding_length = tvb_length(cause_tvb) - length;
134 cause_item = proto_tree_add_text(parameter_tree, cause_tvb, CAUSE_HEADER_OFFSET, tvb_length(cause_tvb), val_to_str(code, cause_code_values, "Unknown error cause"));
135 cause_tree = proto_item_add_subtree(cause_item, ett_asap_cause);
137 proto_tree_add_item(cause_tree, hf_cause_code, cause_tvb, CAUSE_CODE_OFFSET, CAUSE_CODE_LENGTH, NETWORK_BYTE_ORDER);
138 proto_tree_add_item(cause_tree, hf_cause_length, cause_tvb, CAUSE_LENGTH_OFFSET, CAUSE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
142 dissect_unknown_cause(cause_tvb, cause_tree, cause_item);
145 if (padding_length > 0)
146 proto_tree_add_item(cause_tree, hf_cause_padding, cause_tvb, CAUSE_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
150 dissect_error_causes(tvbuff_t *error_causes_tvb, proto_tree *parameter_tree)
152 guint16 length, total_length;
154 tvbuff_t *error_cause_tvb;
157 while(tvb_reported_length_remaining(error_causes_tvb, offset)) {
158 length = tvb_get_ntohs(error_causes_tvb, offset + CAUSE_LENGTH_OFFSET);
159 total_length = ADD_PADDING(length);
160 error_cause_tvb = tvb_new_subset(error_causes_tvb, offset , total_length, total_length);
161 dissect_error_cause(error_cause_tvb, parameter_tree);
162 offset += total_length;
166 /* Dissectors for parameters */
168 #define PARAMETER_TYPE_LENGTH 2
169 #define PARAMETER_LENGTH_LENGTH 2
170 #define PARAMETER_HEADER_LENGTH (PARAMETER_TYPE_LENGTH + PARAMETER_LENGTH_LENGTH)
172 #define PARAMETER_HEADER_OFFSET 0
173 #define PARAMETER_TYPE_OFFSET PARAMETER_HEADER_OFFSET
174 #define PARAMETER_LENGTH_OFFSET (PARAMETER_TYPE_OFFSET + PARAMETER_TYPE_LENGTH)
175 #define PARAMETER_VALUE_OFFSET (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
177 #define IPV4_ADDRESS_LENGTH 4
178 #define IPV4_ADDRESS_OFFSET PARAMETER_VALUE_OFFSET
181 dissect_ipv4_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
183 proto_tree_add_item(parameter_tree, hf_parameter_ipv4_address, parameter_tvb, IPV4_ADDRESS_OFFSET, IPV4_ADDRESS_LENGTH, NETWORK_BYTE_ORDER);
184 proto_item_append_text(parameter_item, " (%s)", ip_to_str((const guint8 *)tvb_get_ptr(parameter_tvb, IPV4_ADDRESS_OFFSET, IPV4_ADDRESS_LENGTH)));
187 #define IPV6_ADDRESS_LENGTH 16
188 #define IPV6_ADDRESS_OFFSET PARAMETER_VALUE_OFFSET
191 dissect_ipv6_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
193 proto_tree_add_item(parameter_tree, hf_parameter_ipv6_address, parameter_tvb, IPV6_ADDRESS_OFFSET, IPV6_ADDRESS_LENGTH, NETWORK_BYTE_ORDER);
194 proto_item_append_text(parameter_item, " (%s)", ip6_to_str((const struct e_in6_addr *)tvb_get_ptr(parameter_tvb, IPV6_ADDRESS_OFFSET, IPV6_ADDRESS_LENGTH)));
197 #define SCTP_PORT_LENGTH 2
198 #define SCTP_RESERVED_LENGTH 2
199 #define SCTP_PORT_OFFSET PARAMETER_VALUE_OFFSET
200 #define SCTP_RESERVED_OFFSET (SCTP_PORT_OFFSET + SCTP_PORT_LENGTH)
201 #define SCTP_ADDRESS_OFFSET (SCTP_RESERVED_OFFSET + SCTP_RESERVED_LENGTH)
204 dissect_sctp_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
206 tvbuff_t *parameters_tvb;
208 proto_tree_add_item(parameter_tree, hf_sctp_port, parameter_tvb, SCTP_PORT_OFFSET, SCTP_PORT_LENGTH, NETWORK_BYTE_ORDER);
209 proto_tree_add_item(parameter_tree, hf_sctp_reserved, parameter_tvb, SCTP_RESERVED_OFFSET, SCTP_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
211 parameters_tvb = tvb_new_subset(parameter_tvb, SCTP_ADDRESS_OFFSET, -1, -1);
212 dissect_parameters(parameters_tvb, parameter_tree);
215 #define TCP_PORT_LENGTH 2
216 #define TCP_RESERVED_LENGTH 2
217 #define TCP_PORT_OFFSET PARAMETER_VALUE_OFFSET
218 #define TCP_RESERVED_OFFSET (TCP_PORT_OFFSET + TCP_PORT_LENGTH)
219 #define TCP_ADDRESS_OFFSET (TCP_RESERVED_OFFSET + TCP_RESERVED_LENGTH)
222 dissect_tcp_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
224 tvbuff_t *parameters_tvb;
226 proto_tree_add_item(parameter_tree, hf_tcp_port, parameter_tvb, TCP_PORT_OFFSET, TCP_PORT_LENGTH, NETWORK_BYTE_ORDER);
227 proto_tree_add_item(parameter_tree, hf_tcp_reserved, parameter_tvb, TCP_RESERVED_OFFSET, TCP_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
229 parameters_tvb = tvb_new_subset(parameter_tvb, TCP_ADDRESS_OFFSET, -1, -1);
230 dissect_parameters(parameters_tvb, parameter_tree);
233 #define UDP_PORT_LENGTH 2
234 #define UDP_RESERVED_LENGTH 2
235 #define UDP_PORT_OFFSET PARAMETER_VALUE_OFFSET
236 #define UDP_RESERVED_OFFSET (UDP_PORT_OFFSET + UDP_PORT_LENGTH)
237 #define UDP_ADDRESS_OFFSET (UDP_RESERVED_OFFSET + UDP_RESERVED_LENGTH)
240 dissect_udp_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
242 tvbuff_t *parameters_tvb;
244 proto_tree_add_item(parameter_tree, hf_udp_port, parameter_tvb, UDP_PORT_OFFSET, UDP_PORT_LENGTH, NETWORK_BYTE_ORDER);
245 proto_tree_add_item(parameter_tree, hf_udp_reserved, parameter_tvb, UDP_RESERVED_OFFSET, UDP_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
247 parameters_tvb = tvb_new_subset(parameter_tvb, UDP_ADDRESS_OFFSET, -1, -1);
248 dissect_parameters(parameters_tvb, parameter_tree);
251 #define POLICY_TYPE_LENGTH 1
252 #define POLICY_VALUE_LENGTH 3
254 #define POLICY_TYPE_OFFSET PARAMETER_VALUE_OFFSET
255 #define POLICY_VALUE_OFFSET (POLICY_TYPE_OFFSET + POLICY_TYPE_LENGTH)
257 #define ROUND_ROBIN_POLICY 1
258 #define LEAST_USED_POLICY 2
259 #define LEAST_USED_WITH_DEG 3
260 #define WEIGHTED_ROUND_ROBIN 4
262 static const value_string policy_type_values[] = {
263 { ROUND_ROBIN_POLICY, "Round robin" },
264 { LEAST_USED_POLICY, "Least used" },
265 { LEAST_USED_WITH_DEG, "Least used with degradation" },
266 { WEIGHTED_ROUND_ROBIN, "Weighted round robin" },
270 dissect_pool_member_selection_policy_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
272 proto_tree_add_item(parameter_tree, hf_policy_type, parameter_tvb, POLICY_TYPE_OFFSET, POLICY_TYPE_LENGTH, NETWORK_BYTE_ORDER);
273 proto_tree_add_item(parameter_tree, hf_policy_value, parameter_tvb, POLICY_VALUE_OFFSET, POLICY_VALUE_LENGTH, NETWORK_BYTE_ORDER);
276 #define POOL_HANDLE_OFFSET PARAMETER_VALUE_OFFSET
279 dissect_pool_handle_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
281 guint16 handle_length;
283 handle_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
284 proto_tree_add_item(parameter_tree, hf_pool_handle, parameter_tvb, POOL_HANDLE_OFFSET, handle_length, NETWORK_BYTE_ORDER);
287 #define PE_PE_IDENTIFIER_LENGTH 4
288 #define HOME_ENRP_INDENTIFIER_LENGTH 4
289 #define REGISTRATION_LIFE_LENGTH 4
291 #define PE_PE_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
292 #define HOME_ENRP_INDENTIFIER_OFFSET (PE_PE_IDENTIFIER_OFFSET + PE_PE_IDENTIFIER_LENGTH)
293 #define REGISTRATION_LIFE_OFFSET (HOME_ENRP_INDENTIFIER_OFFSET + HOME_ENRP_INDENTIFIER_LENGTH)
294 #define USER_TRANSPORT_PARAMETER_OFFSET (REGISTRATION_LIFE_OFFSET + REGISTRATION_LIFE_LENGTH)
297 dissect_pool_element_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
299 tvbuff_t *parameters_tvb;
301 proto_tree_add_item(parameter_tree, hf_pe_pe_identifier, parameter_tvb, PE_PE_IDENTIFIER_OFFSET, PE_PE_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
302 proto_tree_add_item(parameter_tree, hf_home_enrp_id, parameter_tvb, HOME_ENRP_INDENTIFIER_OFFSET, HOME_ENRP_INDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
303 proto_tree_add_item(parameter_tree, hf_reg_life, parameter_tvb, REGISTRATION_LIFE_OFFSET, REGISTRATION_LIFE_LENGTH, NETWORK_BYTE_ORDER);
305 parameters_tvb = tvb_new_subset(parameter_tvb, USER_TRANSPORT_PARAMETER_OFFSET, -1, -1);
306 dissect_parameters(parameters_tvb, parameter_tree);
309 #define SERVER_ID_LENGTH 4
310 #define RESERVED_LENGTH 4
312 #define SERVER_ID_OFFSET PARAMETER_VALUE_OFFSET
313 #define RESERVED_OFFSET (SERVER_ID_OFFSET + SERVER_ID_LENGTH)
314 #define SERVER_TRANSPORT_OFFSET (RESERVED_OFFSET + RESERVED_LENGTH)
316 #define M_BIT_MASK 0x80000000
317 #define RESERVED_MASK 0x7fffffff
320 dissect_server_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
322 tvbuff_t *parameters_tvb;
324 proto_tree_add_item(parameter_tree, hf_server_identifier, parameter_tvb, SERVER_ID_OFFSET, SERVER_ID_LENGTH, NETWORK_BYTE_ORDER);
325 proto_tree_add_item(parameter_tree, hf_m_bit, parameter_tvb, RESERVED_OFFSET, RESERVED_LENGTH, NETWORK_BYTE_ORDER);
326 proto_tree_add_item(parameter_tree, hf_reserved, parameter_tvb, RESERVED_OFFSET, RESERVED_LENGTH, NETWORK_BYTE_ORDER);
328 parameters_tvb = tvb_new_subset(parameter_tvb, SERVER_TRANSPORT_OFFSET, -1, -1);
329 dissect_parameters(parameters_tvb, parameter_tree);
332 #define ERROR_CAUSES_OFFSET PARAMETER_VALUE_OFFSET
335 dissect_operation_error_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
337 tvbuff_t *error_causes_tvb;
339 error_causes_tvb = tvb_new_subset(parameter_tvb, ERROR_CAUSES_OFFSET, -1,-1);
340 dissect_error_causes(error_causes_tvb, parameter_tree);
343 #define COOKIE_OFFSET PARAMETER_VALUE_OFFSET
346 dissect_cookie_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
348 guint16 cookie_length;
350 cookie_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
351 if (cookie_length > 0)
352 proto_tree_add_item(parameter_tree, hf_cookie, parameter_tvb, COOKIE_OFFSET, cookie_length, NETWORK_BYTE_ORDER);
353 proto_item_append_text(parameter_item, " (%u byte%s)", cookie_length, plurality(cookie_length, "", "s"));
356 #define PE_IDENTIFIER_LENGTH 4
357 #define PE_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
360 dissect_pe_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
362 proto_tree_add_item(parameter_tree, hf_pe_identifier, parameter_tvb, PE_IDENTIFIER_OFFSET, PE_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
363 proto_item_append_text(parameter_item, " (0x%x)", tvb_get_ntohl(parameter_tvb, PE_IDENTIFIER_OFFSET));
367 dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
369 guint16 type, parameter_value_length;
371 type = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
372 parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
374 if (parameter_value_length > 0)
375 proto_tree_add_item(parameter_tree, hf_parameter_value, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, NETWORK_BYTE_ORDER);
377 proto_item_append_text(parameter_item, " (type %u and %u byte%s value)", type, parameter_value_length, plurality(parameter_value_length, "", "s"));
380 #define IPV4_ADDRESS_PARAMETER_TYPE 0x01
381 #define IPV6_ADDRESS_PARAMETER_TYPE 0x02
382 #define SCTP_TRANSPORT_PARAMETER_TYPE 0x03
383 #define TCP_TRANSPORT_PARAMETER_TYPE 0x04
384 #define UDP_TRANSPORT_PARAMETER_TYPE 0x05
385 #define POOL_MEMBER_SELECTION_POLICY_PARAMETER_TYPE 0x06
386 #define POOL_HANDLE_PARAMETER_TYPE 0x07
387 #define POOL_ELEMENT_PARAMETER_TYPE 0x08
388 #define SERVER_INFORMATION_PARAMETER_TYPE 0x09
389 #define OPERATION_ERROR_PARAMETER_TYPE 0x0a
390 #define COOKIE_PARAMETER_TYPE 0x0b
391 #define PE_IDENTIFIER_PARAMETER_TYPE 0x0c
393 static const value_string parameter_type_values[] = {
394 { IPV4_ADDRESS_PARAMETER_TYPE, "IPV4 address" },
395 { IPV6_ADDRESS_PARAMETER_TYPE, "IPV6 address" },
396 { SCTP_TRANSPORT_PARAMETER_TYPE, "SCTP transport address" },
397 { TCP_TRANSPORT_PARAMETER_TYPE, "TCP transport address" },
398 { UDP_TRANSPORT_PARAMETER_TYPE, "UDP transport address" },
399 { POOL_MEMBER_SELECTION_POLICY_PARAMETER_TYPE, "Pool member selection policy" },
400 { POOL_HANDLE_PARAMETER_TYPE, "Pool handle" },
401 { POOL_ELEMENT_PARAMETER_TYPE, "Pool element" },
402 { SERVER_INFORMATION_PARAMETER_TYPE, "Server Information" },
403 { OPERATION_ERROR_PARAMETER_TYPE, "Operation error" },
404 { COOKIE_PARAMETER_TYPE, "Cookie" },
405 { PE_IDENTIFIER_PARAMETER_TYPE, "Pool Element identifier" },
410 dissect_parameter(tvbuff_t *parameter_tvb, proto_tree *asap_tree)
412 guint16 type, length, padding_length;
413 proto_item *parameter_item;
414 proto_tree *parameter_tree;
416 /* extract tag and length from the parameter */
417 type = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
418 length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
419 padding_length = tvb_length(parameter_tvb) - length;
421 /* create proto_tree stuff */
422 parameter_item = proto_tree_add_text(asap_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, tvb_length(parameter_tvb), val_to_str(type, parameter_type_values, "Unknown parameter"));
423 parameter_tree = proto_item_add_subtree(parameter_item, ett_asap_parameter);
425 /* add tag and length to the asap tree */
426 proto_tree_add_item(parameter_tree, hf_parameter_type, parameter_tvb, PARAMETER_TYPE_OFFSET, PARAMETER_TYPE_LENGTH, NETWORK_BYTE_ORDER);
427 proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
430 case IPV4_ADDRESS_PARAMETER_TYPE:
431 dissect_ipv4_parameter(parameter_tvb, parameter_tree, parameter_item);
433 case IPV6_ADDRESS_PARAMETER_TYPE:
434 dissect_ipv6_parameter(parameter_tvb, parameter_tree, parameter_item);
436 case SCTP_TRANSPORT_PARAMETER_TYPE:
437 dissect_sctp_transport_parameter(parameter_tvb, parameter_tree);
439 case TCP_TRANSPORT_PARAMETER_TYPE:
440 dissect_tcp_transport_parameter(parameter_tvb, parameter_tree);
442 case UDP_TRANSPORT_PARAMETER_TYPE:
443 dissect_udp_transport_parameter(parameter_tvb, parameter_tree);
445 case POOL_MEMBER_SELECTION_POLICY_PARAMETER_TYPE:
446 dissect_pool_member_selection_policy_parameter(parameter_tvb, parameter_tree);
448 case POOL_HANDLE_PARAMETER_TYPE:
449 dissect_pool_handle_parameter(parameter_tvb, parameter_tree);
451 case POOL_ELEMENT_PARAMETER_TYPE:
452 dissect_pool_element_parameter(parameter_tvb, parameter_tree);
454 case SERVER_INFORMATION_PARAMETER_TYPE:
455 dissect_server_information_parameter(parameter_tvb, parameter_tree);
457 case OPERATION_ERROR_PARAMETER_TYPE:
458 dissect_operation_error_parameter(parameter_tvb, parameter_tree);
460 case COOKIE_PARAMETER_TYPE:
461 dissect_cookie_parameter(parameter_tvb, parameter_tree, parameter_item);
463 case PE_IDENTIFIER_PARAMETER_TYPE:
464 dissect_pe_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
467 dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
471 if (padding_length > 0)
472 proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
476 dissect_parameters(tvbuff_t *parameters_tvb, proto_tree *tree)
478 gint offset, length, total_length, remaining_length;
479 tvbuff_t *parameter_tvb;
482 while((remaining_length = tvb_length_remaining(parameters_tvb, offset))) {
483 length = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
484 total_length = ADD_PADDING(length);
485 if (remaining_length >= length)
486 total_length = MIN(total_length, remaining_length);
487 /* create a tvb for the parameter including the padding bytes */
488 parameter_tvb = tvb_new_subset(parameters_tvb, offset, total_length, total_length);
489 dissect_parameter(parameter_tvb, tree);
490 /* get rid of the handled parameter */
491 offset += total_length;
495 #define MESSAGE_TYPE_LENGTH 1
496 #define MESSAGE_FLAGS_LENGTH 1
497 #define MESSAGE_LENGTH_LENGTH 2
499 #define MESSAGE_TYPE_OFFSET 0
500 #define MESSAGE_FLAGS_OFFSET (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
501 #define MESSAGE_LENGTH_OFFSET (MESSAGE_FLAGS_OFFSET + MESSAGE_FLAGS_LENGTH)
502 #define MESSAGE_VALUE_OFFSET (MESSAGE_LENGTH_OFFSET + MESSAGE_LENGTH_LENGTH)
504 #define REGISTRATION_MESSAGE_TYPE 0x01
505 #define DEREGISTRATION_MESSAGE_TYPE 0x02
506 #define REGISTRATION_RESPONSE_MESSAGE_TYPE 0x03
507 #define DEREGISTRATION_RESPONSE_MESSAGE_TYPE 0x04
508 #define NAME_RESOLUTION_MESSAGE_TYPE 0x05
509 #define NAME_RESOLUTION_RESPONSE_MESSAGE_TYPE 0x06
510 #define ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE 0x07
511 #define ENDPOINT_KEEP_ALIVE_ACK_MESSAGE_TYPE 0x08
512 #define ENDPOINT_UNREACHABLE_MESSAGE_TYPE 0x09
513 #define SERVER_ANNOUNCE_MESSAGE_TYPE 0x0a
514 #define COOKIE_MESSAGE_TYPE 0x0b
515 #define COOKIE_ECHO_MESSAGE_TYPE 0x0c
516 #define BUSINESS_CARD_MESSAGE_TYPE 0x0d
517 #define PEER_ERROR_MESSAGE_TYPE 0x0e
519 static const value_string message_type_values[] = {
520 { REGISTRATION_MESSAGE_TYPE, "Registration" },
521 { DEREGISTRATION_MESSAGE_TYPE, "Deregistration" },
522 { REGISTRATION_RESPONSE_MESSAGE_TYPE, "Registration response" },
523 { DEREGISTRATION_RESPONSE_MESSAGE_TYPE, "Deregistration response" },
524 { NAME_RESOLUTION_MESSAGE_TYPE, "Name resolution" },
525 { NAME_RESOLUTION_RESPONSE_MESSAGE_TYPE, "Name resolution response" },
526 { ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE, "Endpoint keep alive" },
527 { ENDPOINT_KEEP_ALIVE_ACK_MESSAGE_TYPE, "Endpoint keep alive acknowledgement" },
528 { ENDPOINT_UNREACHABLE_MESSAGE_TYPE, "Endpoint unreachable" },
529 { SERVER_ANNOUNCE_MESSAGE_TYPE, "Server announce" },
530 { COOKIE_MESSAGE_TYPE, "Cookie" },
531 { COOKIE_ECHO_MESSAGE_TYPE, "Cookie echo" },
532 { BUSINESS_CARD_MESSAGE_TYPE, "Business card" },
533 { PEER_ERROR_MESSAGE_TYPE, "Peer error" },
537 dissect_asap_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *asap_tree)
539 tvbuff_t *parameters_tvb;
541 if (check_col(pinfo->cinfo, COL_INFO))
542 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(tvb_get_guint8(message_tvb, MESSAGE_TYPE_OFFSET), message_type_values, "Unknown ASAP type"));
545 proto_tree_add_item(asap_tree, hf_message_type, message_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
546 proto_tree_add_item(asap_tree, hf_message_flags, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, NETWORK_BYTE_ORDER);
547 proto_tree_add_item(asap_tree, hf_message_length, message_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
548 parameters_tvb = tvb_new_subset(message_tvb, MESSAGE_VALUE_OFFSET, -1, -1);
549 dissect_parameters(parameters_tvb, asap_tree);
554 dissect_asap(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree)
556 proto_item *asap_item;
557 proto_tree *asap_tree;
559 /* make entry in the Protocol column on summary display */
560 if (check_col(pinfo->cinfo, COL_PROTOCOL))
561 col_set_str(pinfo->cinfo, COL_PROTOCOL, "ASAP");
563 /* In the interest of speed, if "tree" is NULL, don't do any work not
564 necessary to generate protocol tree items. */
566 /* create the asap protocol tree */
567 asap_item = proto_tree_add_item(tree, proto_asap, message_tvb, 0, -1, FALSE);
568 asap_tree = proto_item_add_subtree(asap_item, ett_asap);
572 /* dissect the message */
573 dissect_asap_message(message_tvb, pinfo, asap_tree);
576 /* Register the protocol with Ethereal */
578 proto_register_asap(void)
581 /* Setup list of header fields */
582 static hf_register_info hf[] = {
583 { &hf_message_type, { "Type", "asap.message_type", FT_UINT8, BASE_DEC, VALS(message_type_values), 0x0, "", HFILL } },
584 { &hf_message_flags, { "Flags", "asap.message_flags", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL } },
585 { &hf_message_length, { "Length", "asap.message_length", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
586 { &hf_cause_code, { "Cause code", "asap.cause.code", FT_UINT16, BASE_HEX, VALS(cause_code_values), 0x0, "", HFILL } },
587 { &hf_cause_length, { "Cause length", "asap.cause.length", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
588 { &hf_cause_info, { "Cause info", "asap.cause.info", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
589 { &hf_cause_padding, { "Padding", "asap.cause.padding", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
590 { &hf_parameter_type, { "Parameter Type", "asap.parameter.type", FT_UINT16, BASE_HEX, VALS(parameter_type_values), 0x0, "", HFILL } },
591 { &hf_parameter_length, { "Parameter length", "asap.parameter.length", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
592 { &hf_parameter_value, { "Parameter value", "asap.parameter.value", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
593 { &hf_parameter_padding, { "Padding", "asap.parameter.padding", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
594 { &hf_parameter_ipv4_address, { "IP Version 4 address", "asap.ipv4_address.ipv4_address", FT_IPv4, BASE_NONE, NULL, 0x0, "", HFILL } },
595 { &hf_parameter_ipv6_address, { "IP Version 6 address", "asap.ipv6_address.ipv6_address", FT_IPv6, BASE_NONE, NULL, 0x0, "", HFILL } },
596 { &hf_sctp_port, { "Port", "asap.sctp_transport.port", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
597 { &hf_sctp_reserved, { "Reserved", "asap.sctp_transport.reserved", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
598 { &hf_tcp_port, { "Port", "asap.tcp_transport.port", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
599 { &hf_tcp_reserved, { "Reserved", "asap.tcp_transport.reserved", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
600 { &hf_udp_port, { "Port", "asap.udp_transport.port", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
601 { &hf_udp_reserved, { "Reserved", "asap.udp_transport.reserved", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
602 { &hf_policy_type, { "Policy type", "asap.pool_member_slection_policy.type", FT_UINT8, BASE_DEC, VALS(policy_type_values), 0x0, "", HFILL } },
603 { &hf_policy_value, { "Policy value", "asap.pool_member_slection_policy.value", FT_INT24, BASE_DEC, NULL, 0x0, "", HFILL } },
604 { &hf_pool_handle, { "Pool handle", "asap.pool_handle.pool_handle", FT_BYTES, BASE_HEX, NULL, 0x0, "", HFILL } },
605 { &hf_pe_pe_identifier, { "PE identifier", "asap.pool_element.pe_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } },
606 { &hf_home_enrp_id, { "Home ENRP server identifier", "asap.pool_element.home_enrp_server_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } },
607 { &hf_reg_life, { "Registration life", "asap.pool_element.registration_life", FT_INT32, BASE_DEC, NULL, 0x0, "", HFILL } },
608 { &hf_server_identifier, { "Server identifier", "asap.server_information.server_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } },
609 { &hf_m_bit, { "M-Bit", "asap.server_information.m_bit", FT_BOOLEAN, 32, NULL, M_BIT_MASK, "", HFILL } },
610 { &hf_reserved, { "Reserved", "asap.server_information.reserved", FT_UINT32, BASE_HEX, NULL, RESERVED_MASK, "", HFILL } },
611 { &hf_cookie, { "Cookie", "asap.cookie.cookie", FT_BYTES, BASE_HEX, NULL, 0x0, "", HFILL } },
612 { &hf_pe_identifier, { "PE identifier", "asap.pe_identifier.pe_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } },
615 /* Setup protocol subtree array */
616 static gint *ett[] = {
622 /* Register the protocol name and description */
623 proto_asap = proto_register_protocol("Aggregate Server Access Protocol", "ASAP", "asap");
625 /* Required function calls to register the header fields and subtrees used */
626 proto_register_field_array(proto_asap, hf, array_length(hf));
627 proto_register_subtree_array(ett, array_length(ett));
632 proto_reg_handoff_asap(void)
634 dissector_handle_t asap_handle;
636 asap_handle = create_dissector_handle(dissect_asap, proto_asap);
637 dissector_add("sctp.ppi", ASAP_PAYLOAD_PROTOCOL_ID, asap_handle);