1 /* packet-ancp.c
2 *
3 * Dissector for ANCP - Access Node Control Protocol
4 *
5 * More info on the protocol can be found on IETF:
6 * https://tools.ietf.org/wg/ancp/
7 * https://tools.ietf.org/html/draft-ietf-ancp-protocol-09
8 * https://tools.ietf.org/html/rfc6320
9 * https://www.iana.org/assignments/ancp/ancp.xhtml
10 *
11 * Copyright 2010, Aniruddha.A (anira@cisco.com)
12 * Uli Heilmeier, 2017; Update to RFC6320; current IANA registry types
13 *
14 * Wireshark - Network traffic analyzer
15 * By Gerald Combs <gerald@wireshark.org>
16 * Copyright 1998 Gerald Combs
17 *
18 * SPDX-License-Identifier: GPL-2.0-or-later
19 */
20
21 #include "config.h"
22
23 #include <epan/packet.h>
24 #include <epan/stats_tree.h>
25 #include "packet-tcp.h"
26
27 #define ANCP_PORT 6068 /* The ANCP TCP port:draft-ietf-ancp-protocol-09.txt */
28
29 #define ANCP_MIN_HDR 4
30 #define ANCP_GSMP_ETHER_TYPE 0x880C
31 #define TECH_TYPE_DSL 0x5
32 #define TECH_TYPE_PON 0x1
33
34 #define ANCP_RESULT_MASK 0xF0
35 #define ANCP_CODE_MASK 0x0FFF
36 #define ANCP_I_FLAG_MASK 0x80
37 #define ANCP_SUBMSG_MASK 0x7FFF
38 #define ADJ_CODE_MASK 0x7F /* excluding MSB M-Flag */
39
40 #define ANCP_MTYPE_ADJ 10
41 #define ANCP_MTYPE_PORT_MGMT 32
42 #define ANCP_MTYPE_PORT_UP 80
43 #define ANCP_MTYPE_PORT_DN 81
44 #define ANCP_MTYPE_ADJ_UPD 85
45 #define ANCP_MTYPE_GEN_RSP 91
46 #define ANCP_MTYPE_PROV 93
47
48 /* Topology Discovery Extensions */
49 #define TLV_DSL_LINE_ATTRIBUTES 0x04
50 #define TLV_DSL_LINE_STATE 0x8F
51 #define TLV_DSL_TYPE 0x91
52
53 /* Port Management Extensions */
54 #define TLV_PING_PARAMS 0x07
55 #define TLV_PING_OPAQUE_DATA 0x08
56 #define TLV_PING_RES_STR 0x09
57
58 #define SKIPPADDING(_ofst, _len) \
59 do { \
60 if ((_len) % 4) \
61 _ofst += (4 - ((_len) % 4)); \
62 } while(0)
63
64 void proto_register_ancp(void);
65 void proto_reg_handoff_ancp(void);
66
67 static int hf_ancp_len = -1;
68 static int hf_ancp_len2 = -1;
69 static int hf_ancp_ver = -1;
70 static int hf_ancp_mtype = -1;
71 static int hf_ancp_timer = -1;
72 static int hf_ancp_adj_code = -1;
73 static int hf_ancp_sender_name = -1;
74 static int hf_ancp_receiver_name = -1;
75 static int hf_ancp_sender_port = -1;
76 static int hf_ancp_receiver_port = -1;
77 static int hf_ancp_p_info = -1;
78 static int hf_ancp_sender_instance = -1;
79 static int hf_ancp_p_id = -1;
80 static int hf_ancp_receiver_instance = -1;
81 static int hf_ancp_tech_type = -1;
82 static int hf_ancp_num_tlvs = -1;
83 static int hf_ancp_tot_len = -1;
84 static int hf_ancp_cap = -1;
85 static int hf_ancp_result = -1;
86 static int hf_ancp_code = -1;
87 static int hf_ancp_trans_id = -1;
88 static int hf_ancp_i_flag = -1;
89 static int hf_ancp_submsg_num = -1;
90 static int hf_ancp_pudm_unused = -1;
91 static int hf_ancp_function = -1;
92 static int hf_ancp_x_function = -1;
93 static int hf_ancp_ext_flags_res = -1;
94 static int hf_ancp_reserved = -1;
95 static int hf_ancp_blk_len = -1;
96 static int hf_ancp_num_ext_tlvs = -1;
97 static int hf_ancp_ext_tlv_type = -1;
98 static int hf_ancp_ext_tlv_len = -1;
99 static int hf_ancp_dsl_line_stlv_type = -1;
100 static int hf_ancp_dsl_line_stlv_len = -1;
101 static int hf_ancp_dsl_line_stlv_value = -1;
102 static int hf_ancp_ext_tlv_value_str = -1;
103 static int hf_ancp_oam_opaque = -1;
104 static int hf_ancp_oam_loopb_cnt = -1;
105 static int hf_ancp_oam_timeout = -1;
106
107 static gint ett_ancp_len = -1;
108 static gint ett_ancp_ver = -1;
109 static gint ett_ancp_mtype = -1;
110 static gint ett_ancp_timer = -1;
111 static gint ett_ancp_adj_code = -1;
112 static gint ett_ancp_sender_name = -1;
113 static gint ett_ancp_receiver_name = -1;
114 static gint ett_ancp_sender_port = -1;
115 static gint ett_ancp_receiver_port = -1;
116 static gint ett_ancp_p_info = -1;
117 static gint ett_ancp_sender_instance = -1;
118 static gint ett_ancp_p_id = -1;
119 static gint ett_ancp_receiver_instance = -1;
120 static gint ett_ancp_tech_type = -1;
121 static gint ett_ancp_num_tlvs = -1;
122 static gint ett_ancp_tot_len = -1;
123 static gint ett_ancp_cap = -1;
124 static gint ett_ancp_result = -1;
125 static gint ett_ancp_code = -1;
126 static gint ett_ancp_trans_id = -1;
127 static gint ett_ancp_i_flag = -1;
128 static gint ett_ancp_submsg_num = -1;
129 static gint ett_ancp_port = -1;
130 static gint ett_ancp_port_sess_num= -1;
131 static gint ett_ancp_evt_seq_num = -1;
132 static gint ett_ancp_label = -1;
133 static gint ett_ancp_reserved = -1;
134 static gint ett_ancp_blk_len = -1;
135 static gint ett_ancp_num_ext_tlvs = -1;
136 static gint ett_ancp_ext_tlv_type = -1;
137 static gint ett_ancp_dsl_line_stlv_type = -1;
138 static gint ett_ancp_dsl_line_stlv_val = -1;
139 static gint ett_ancp_ext_tlv_value_str = -1;
140 static gint ett_ancp_oam_opaque = -1;
141 static gint ett_ancp_oam_loopb_cnt = -1;
142 static gint ett_ancp_oam_timeout = -1;
143
144 static int proto_ancp = -1;
145
146 /* ANCP stats - Tap interface */
147 static const guint8 *st_str_packets = "Total Packets";
148 static const guint8 *st_str_packet_types = "ANCP Packet Types";
149 static const guint8 *st_str_adj_pack_types = "ANCP Adjacency Packet Types";
150
151 static int st_node_packets = -1;
152 static int st_node_packet_types = -1;
153 static int st_node_adj_pack_types = -1;
154 static int ancp_tap = -1;
155
156 struct ancp_tap_t {
157 gint ancp_mtype;
158 gint ancp_adjcode; /* valid for ancp adjacency message only */
159 };
160
161 /* Value Strings */
162 static const value_string mtype_names[] = {
163 { 10, "Adjacency" },
164 { 32, "Port-Management" },
165 { 80, "Port-Up" },
166 { 81, "Port-Down" },
167 { 85, "Adjacency Update" },
168 { 91, "Generic Response" },
169 { 93, "Provisioning" },
170 { 0, NULL }
171 };
172
173 static const value_string adj_code_names[] = {
174 { 1, "Syn" },
175 { 2, "SynAck" },
176 { 3, "Ack" },
177 { 4, "Rstack" },
178 { 0, NULL }
179 };
180
181 static const value_string captype_names[] = {
182 { 1, "Dynamic-Topology-Discovery" },
183 { 2, "Line-Configuration" },
184 { 3, "Transactional-Multicast" },
185 { 4, "OAM" },
186 { 0, NULL }
187 };
188
189 static const value_string resulttype_names[] = {
190 { 0, "Ignore" },
191 { 1, "NAck" },
192 { 2, "AckAll" },
193 { 3, "Success" },
194 { 4, "Failure" },
195 { 0, NULL }
196 };
197
198 static const value_string codetype_names[] = {
199 { 0x000, "No result" },
200 { 0x002, "Invalid request message" },
201 { 0x006, "One or more of the specified ports are down" },
202 { 0x013, "Out of resources" },
203 { 0x051, "Request message type not implemented" },
204 { 0x053, "Malformed message" },
205 { 0x054, "Mandatory TLV missing" },
206 { 0x055, "Invalid TLV contents" },
207 { 0x500, "One or more of the specified ports do not exist" },
208 { 0x501, "Loopback test timed out" },
209 { 0x502, "Reserved" },
210 { 0x503, "DSL access line status showtime" },
211 { 0x504, "DSL access line status idle" },
212 { 0x505, "DSL access line status silent" },
213 { 0x506, "DSL access line status training" },
214 { 0x507, "DSL access line integrity error" },
215 { 0x508, "DSLAM resource not available" },
216 { 0x509, "Invalid test parameter" },
217 { 0, NULL }
218 };
219
220 static const value_string techtype_str[] = {
221 { 0x00, "Not technology dependent" },
222 { 0x01, "PON" },
223 { 0x05, "DSL" },
224 { 0xFF, "Reserved" },
225 { 0, NULL }
226 };
227
228 static const value_string dsl_line_attrs[] = {
229 { 0x91, "DSL-Type" },
230 { 0x81, "Actual-Net-Data-Rate-Upstream" },
231 { 0x82, "Actual-Net-Data-Rate-Downstream" },
232 { 0x83, "Minimum-Net-Data-Rate-Upstream" },
233 { 0x84, "Minimum-Net-Data-Rate-Downstream" },
234 { 0x85, "Attainable-Net-Data-Rate-Upstream" },
235 { 0x86, "Attainable-Net-Data-Rate-Downstream" },
236 { 0x87, "Maximum-Net-Data-Rate-Upstream" },
237 { 0x88, "Maximum-Net-Data-Rate-Downstream" },
238 { 0x89, "Minimum-Net-Low-Power-Data-Rate-Upstream" },
239 { 0x8A, "Minimum-Net-Low-Power-Data-Rate-Downstream" },
240 { 0x8B, "Maximum-Interleaving-Delay-Upstream" },
241 { 0x8C, "Actual-Interleaving-Delay-Upstream" },
242 { 0x8D, "Maximum-Interleaving-Delay-Downstream" },
243 { 0x8E, "Actual-Interleaving-Delay-Downstream" },
244 { 0x8F, "DSL line state" },
245 { 0x90, "Access Loop Encapsulation" },
246 { 0, NULL }
247 };
248
249 static const value_string dsl_line_attr_units[] = {
250 { 0x91, "" },
251 { 0x81, "Kb/sec" },
252 { 0x82, "Kb/sec" },
253 { 0x83, "Kb/sec" },
254 { 0x84, "Kb/sec" },
255 { 0x85, "Kb/sec" },
256 { 0x86, "Kb/sec" },
257 { 0x87, "Kb/sec" },
258 { 0x88, "Kb/sec" },
259 { 0x89, "Kb/sec" },
260 { 0x8A, "Kb/sec" },
261 { 0x8B, "msec" },
262 { 0x8C, "msec" },
263 { 0x8D, "msec" },
264 { 0x8E, "msec" },
265 { 0x8F, "" },
266 { 0x90, "" },
267 { 0, NULL }
268 };
269
270 static const value_string dsl_line_type_names[] = {
271 { 1, "ADSL1" },
272 { 2, "ADSL2" },
273 { 3, "ADSL2+" },
274 { 4, "VDSL1" },
275 { 5, "VDSL2" },
276 { 6, "SDSL" },
277 { 0, NULL }
278 };
279
280 static const value_string dsl_line_state_names[] = {
281 { 1, "Showtime" },
282 { 2, "Idle" },
283 { 3, "Silent" },
284 { 0, NULL }
285 };
286
287 static const value_string function_names[] = {
288 { 0, "Reserved" },
289 { 8, "Configure Connection Service Data" },
290 { 9, "Remote Loopback" },
291 { 0, NULL }
292 };
293
294 static const value_string ext_tlv_types[] = {
295 { 0x0001, "Access-Loop-Circuit-ID" },
296 { 0x0002, "Access-Loop-Remote-ID" },
297 { 0x0003, "Access-Aggregation-Circuit-ID-ASCII" },
298 { 0x0004, "DSL Line Attributes" },
299 { 0x0005, "Service-Profile-Name" },
300 { 0x0006, "Access-Aggregation-Circuit-ID-Binary" },
301 { 0x0007, "OAM-Loopback-Test-Parameters" },
302 { 0x0008, "Opaque-Data" },
303 { 0x0009, "OAM-Loopback-Test-Response-String" },
304 { 0x0011, "Command" },
305 { 0x0013, "Multicast-Service-Profile" },
306 { 0x0015, "Bandwidth-Allocation" },
307 { 0x0016, "Bandwidth-Request" },
308 { 0x0018, "Multicast-Service-Profile-Name" },
309 { 0x0019, "Multicast-Flow" },
310 { 0x0021, "List-Action" },
311 { 0x0022, "Sequence-Number" },
312 { 0x0024, "White-List-CAC" },
313 { 0x0025, "MRepCtl-CAC" },
314 { 0x0081, "Actual-Net-Data-Rate-Upstream" },
315 { 0x0082, "Actual-Net-Data-Rate-Downstream" },
316 { 0x0083, "Minimum-Net-Data-Rate-Upstream" },
317 { 0x0084, "Minimum-Net-Data-Rate-Downstream" },
318 { 0x0085, "Attainable-Net-Data-Rate-Upstream" },
319 { 0x0086, "Attainable-Net-Data-Rate-Downstream" },
320 { 0x0087, "Maximum-Net-Data-Rate-Upstream" },
321 { 0x0088, "Maximum-Net-Data-Rate-Downstream" },
322 { 0x0089, "Minimum-Net-Low-Power-Data-Rate-Upstream" },
323 { 0x008A, "Minimum-Net-Low-Power-Data-Rate-Downstream" },
324 { 0x008B, "Maximum-Interleaving-Delay-Upstream" },
325 { 0x008C, "Actual-Interleaving-Delay-Upstream" },
326 { 0x008D, "Maximum-Interleaving-Delay-Downstream" },
327 { 0x008E, "Actual-Interleaving-Delay-Downstream" },
328 { 0x008F, "DSL-Line-State" },
329 { 0x0090, "Access-Loop-Encapsulation" },
330 { 0x0091, "DSL-Type" },
331 { 0x0092, "Request-Source-IP" },
332 { 0x0093, "Request-Source-MAC" },
333 { 0x0094, "Report-Buffering-Time" },
334 { 0x0095, "Committed-Bandwidth" },
335 { 0x0096, "Request-Source-Device-Id" },
336 { 0x0106, "Status-Info" },
337 { 0x1000, "Target (single access line variant)" },
338 { 0, NULL }
339 };
340 static value_string_ext ext_tlv_types_ext = VALUE_STRING_EXT_INIT(ext_tlv_types);
341
342 static gint
dissect_ancp_tlv(tvbuff_t * tvb,proto_tree * tlv_tree,gint offset)343 dissect_ancp_tlv(tvbuff_t *tvb, proto_tree *tlv_tree, gint offset)
344 {
345 guint16 tlen, ttype;
346 gint16 num_stlvs;
347 proto_item *tti;
348
349 proto_tree_add_item(tlv_tree, hf_ancp_ext_tlv_type, tvb, offset, 2, ENC_BIG_ENDIAN);
350 ttype = tvb_get_ntohs(tvb, offset);
351 offset += 2;
352
353 tti = proto_tree_add_item(tlv_tree, hf_ancp_ext_tlv_len, tvb, offset, 2, ENC_BIG_ENDIAN);
354 tlen = tvb_get_ntohs(tvb, offset);
355 offset += 2;
356
357 /*
358 * Extension Block is common for event message and port
359 * management message, but the TLVs that can appear
360 * are different
361 */
362 switch (ttype) {
363 case TLV_DSL_LINE_ATTRIBUTES:
364 {
365 proto_tree *dsl_tree;
366 guint16 stlvtype, stlvlen;
367 gint val;
368
369 /* Create a DSL Attribute SubTree */
370 dsl_tree = proto_item_add_subtree(tti, ett_ancp_ext_tlv_type);
371 num_stlvs = tlen / 8; /* TODO - better way? */
372 for ( ;num_stlvs; num_stlvs--) {
373 proto_tree_add_item(dsl_tree,
374 hf_ancp_dsl_line_stlv_type, tvb, offset,
375 2, ENC_BIG_ENDIAN);
376 stlvtype = tvb_get_ntohs(tvb, offset);
377 offset += 2;
378 proto_tree_add_item(dsl_tree,
379 hf_ancp_dsl_line_stlv_len, tvb, offset,
380 2, ENC_BIG_ENDIAN);
381 stlvlen = tvb_get_ntohs(tvb, offset);
382 offset += 2; /* Sub TLV Length */
383
384 tti = proto_tree_add_item(dsl_tree,
385 hf_ancp_dsl_line_stlv_value, tvb, offset,
386 stlvlen, ENC_BIG_ENDIAN);
387 val = tvb_get_ntohl(tvb, offset);
388 offset += stlvlen; /* Except loop-encap, rest are 4B */
389
390 switch (stlvtype) {
391 case TLV_DSL_LINE_STATE:
392 proto_item_append_text(tti, " (%s)",
393 val_to_str(val, dsl_line_state_names,
394 "Unknown (0x%02x)"));
395 break;
396 case TLV_DSL_TYPE:
397 proto_item_append_text(tti, " (%s)",
398 val_to_str(val, dsl_line_type_names,
399 "Unknown (0x%02x)"));
400 break;
401
402 default:
403 /* Add Unit */
404 proto_item_append_text(tti, " %s",
405 val_to_str(stlvtype,
406 dsl_line_attr_units,
407 "Unknown (0x%02x)"));
408 break;
409 }
410 SKIPPADDING(offset, stlvlen);
411 }
412 break;
413 }
414 case TLV_PING_OPAQUE_DATA:
415 /* 2 32b values*/
416 proto_tree_add_item(tlv_tree, hf_ancp_oam_opaque,
417 tvb, offset, 4, ENC_BIG_ENDIAN);
418 offset += 4;
419 proto_tree_add_item(tlv_tree, hf_ancp_oam_opaque,
420 tvb, offset, 4, ENC_BIG_ENDIAN);
421 offset += 4;
422 break;
423 case TLV_PING_PARAMS:
424 /* Count (1B) Timeout (1B), 2B empty */
425 proto_tree_add_item(tlv_tree,
426 hf_ancp_oam_loopb_cnt, tvb, offset, 1, ENC_BIG_ENDIAN);
427 offset += 1;
428 proto_tree_add_item(tlv_tree,
429 hf_ancp_oam_timeout, tvb, offset, 1, ENC_BIG_ENDIAN);
430 offset += 1;
431 /* Lets not bother about 2B until IETF WG figures out */
432 offset += 2;
433 break;
434 default:
435 /* Assume TLV value is string - covers ALCID, OAM resp */
436 proto_tree_add_item(tlv_tree, hf_ancp_ext_tlv_value_str,
437 tvb, offset, tlen, ENC_ASCII|ENC_NA);
438 offset += tlen;
439 SKIPPADDING(offset, tlen);
440 break;
441 } /* end switch {ttype} */
442 return offset;
443 }
444
445 static void
dissect_ancp_port_up_dn_mgmt(tvbuff_t * tvb,proto_tree * ancp_tree,gint offset,guint8 mtype)446 dissect_ancp_port_up_dn_mgmt(tvbuff_t *tvb, proto_tree *ancp_tree, gint offset, guint8 mtype)
447 {
448 guint8 tech_type;
449 gint16 num_tlvs;
450 proto_item *sti;
451
452 if (mtype == ANCP_MTYPE_PORT_MGMT) {
453 proto_tree_add_item(ancp_tree, hf_ancp_pudm_unused, tvb, offset, 14, ENC_NA);
454 offset += 14;
455
456 proto_tree_add_item(ancp_tree, hf_ancp_function, tvb, offset, 1, ENC_BIG_ENDIAN);
457 offset += 1;
458
459 proto_tree_add_item(ancp_tree, hf_ancp_x_function, tvb, offset, 1, ENC_BIG_ENDIAN);
460 offset += 1;
461
462 proto_tree_add_item(ancp_tree, hf_ancp_pudm_unused, tvb, offset, 4, ENC_NA);
463 offset += 4;
464 } else {
465 proto_tree_add_item(ancp_tree, hf_ancp_pudm_unused, tvb, offset, 20, ENC_NA);
466 offset += 20;
467 }
468
469 proto_tree_add_item(ancp_tree, hf_ancp_ext_flags_res, tvb, offset, 1, ENC_NA);
470 offset += 1;
471
472 proto_tree_add_item(ancp_tree, hf_ancp_mtype, tvb, offset, 1, ENC_BIG_ENDIAN);
473 offset += 1;
474
475 if (mtype == ANCP_MTYPE_PORT_MGMT) {
476 proto_tree_add_item(ancp_tree, hf_ancp_reserved, tvb, offset, 2, ENC_NA);
477 offset += 2;
478 tech_type = 0;
479 } else {
480 proto_tree_add_item(ancp_tree, hf_ancp_tech_type, tvb, offset, 1, ENC_BIG_ENDIAN);
481 tech_type = tvb_get_guint8(tvb, offset);
482 offset += 1;
483
484 proto_tree_add_item(ancp_tree, hf_ancp_reserved, tvb, offset, 1, ENC_NA);
485 offset += 1;
486 }
487
488 proto_tree_add_item(ancp_tree, hf_ancp_num_ext_tlvs, tvb, offset, 2, ENC_BIG_ENDIAN);
489 num_tlvs = tvb_get_ntohs(tvb, offset);
490 offset += 2;
491
492 sti = proto_tree_add_item(ancp_tree, hf_ancp_blk_len, tvb, offset, 2, ENC_BIG_ENDIAN);
493 offset += 2;
494
495 if (tech_type == TECH_TYPE_DSL || tech_type == TECH_TYPE_PON) {
496 proto_tree *tlv_tree;
497
498 /* Create a TLV sub tree */
499 tlv_tree = proto_item_add_subtree(sti, ett_ancp_len);
500
501 for( ;num_tlvs; num_tlvs--) {
502 offset = dissect_ancp_tlv(tvb, tlv_tree, offset);
503 } /* end for {numtlvs} */
504 } /* end if {DSL} */
505 }
506
507 static void
dissect_ancp_adj_msg(tvbuff_t * tvb,packet_info * pinfo,proto_tree * ancp_tree,gint offset,struct ancp_tap_t * ancp_info)508 dissect_ancp_adj_msg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *ancp_tree,
509 gint offset, struct ancp_tap_t *ancp_info
510 )
511 {
512 proto_item *sti;
513 proto_tree *ancp_cap_tree;
514 guint8 byte, numcaps, adjcode;
515 guint16 tlv_len;
516
517 sti = proto_tree_add_item(ancp_tree, hf_ancp_timer, tvb, offset, 1,
518 ENC_BIG_ENDIAN);
519 offset += 1;
520 proto_item_append_text(sti, " msec");
521
522 sti = proto_tree_add_item(ancp_tree, hf_ancp_adj_code, tvb, offset, 1,
523 ENC_BIG_ENDIAN);
524 byte = tvb_get_guint8(tvb, offset);
525 offset += 1;
526 adjcode = byte & ADJ_CODE_MASK;
527 ancp_info->ancp_adjcode = adjcode; /* stats */
528 proto_item_append_text(sti, " (%s, M Flag %s)",
529 val_to_str(adjcode, adj_code_names, "Unknown (0x%02x)"),
530 (byte >> 7) ? "Set" : "Unset");
531 col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)",
532 val_to_str(adjcode, adj_code_names, "Unknown (0x%02x)"));
533
534 proto_tree_add_item(ancp_tree, hf_ancp_sender_name, tvb, offset, 6, ENC_NA);
535 offset += 6;
536
537 proto_tree_add_item(ancp_tree, hf_ancp_receiver_name, tvb,offset, 6, ENC_NA);
538 offset += 6;
539
540 proto_tree_add_item(ancp_tree, hf_ancp_sender_port, tvb, offset, 4, ENC_BIG_ENDIAN);
541 offset += 4;
542
543 proto_tree_add_item(ancp_tree, hf_ancp_receiver_port, tvb,offset, 4, ENC_BIG_ENDIAN);
544 offset += 4;
545
546 sti = proto_tree_add_item(ancp_tree, hf_ancp_p_info, tvb,
547 offset, 1, ENC_BIG_ENDIAN);
548 byte = tvb_get_guint8(tvb, offset);
549 offset += 1;
550 proto_item_append_text(sti, " (Type = %d, Flag = %d)",
551 byte >> 4, byte & 0x0F);
552
553 proto_tree_add_item(ancp_tree, hf_ancp_sender_instance, tvb, offset, 3, ENC_BIG_ENDIAN);
554 offset += 3;
555
556 proto_tree_add_item(ancp_tree, hf_ancp_p_id, tvb, offset, 1, ENC_BIG_ENDIAN);
557 offset += 1;
558
559 proto_tree_add_item(ancp_tree, hf_ancp_receiver_instance, tvb, offset, 3, ENC_BIG_ENDIAN);
560 offset += 3;
561
562 proto_tree_add_item(ancp_tree, hf_ancp_reserved, tvb, offset, 1, ENC_NA);
563 offset += 1;
564
565 sti = proto_tree_add_item(ancp_tree, hf_ancp_num_tlvs, tvb, offset, 1, ENC_BIG_ENDIAN);
566 numcaps = tvb_get_guint8(tvb, offset);
567 offset += 1;
568
569 /* Start the capability subtree */
570 ancp_cap_tree = proto_item_add_subtree(sti, ett_ancp_tot_len);
571
572 proto_tree_add_item(ancp_cap_tree, hf_ancp_tot_len, tvb, offset, 2, ENC_BIG_ENDIAN);
573 offset += 2;
574
575 for ( ;numcaps; numcaps--) {
576 sti = proto_tree_add_item(ancp_cap_tree, hf_ancp_cap, tvb, offset, 2, ENC_BIG_ENDIAN);
577 offset += 2;
578
579 tlv_len = tvb_get_ntohs(tvb, offset);
580 offset += 2;
581 proto_item_append_text(sti, " (%d bytes)", tlv_len);
582 /* TODO - if there are non boolean caps, validate before use */
583 }
584 }
585
586 static void
ancp_stats_tree_init(stats_tree * st)587 ancp_stats_tree_init(stats_tree *st)
588 {
589 st_node_packets = stats_tree_create_node(st, st_str_packets, 0, STAT_DT_INT, TRUE);
590 st_node_packet_types = stats_tree_create_pivot(st, st_str_packet_types,
591 st_node_packets);
592 st_node_adj_pack_types = stats_tree_create_node(st, st_str_adj_pack_types,
593 st_node_packets, STAT_DT_INT, TRUE);
594 }
595
596 static tap_packet_status
ancp_stats_tree_packet(stats_tree * st,packet_info * pinfo _U_,epan_dissect_t * edt _U_,const void * p)597 ancp_stats_tree_packet(stats_tree* st, packet_info* pinfo _U_,
598 epan_dissect_t* edt _U_ , const void* p)
599 {
600 const struct ancp_tap_t *pi = (const struct ancp_tap_t *) p;
601
602 tick_stat_node(st, st_str_packets, 0, FALSE);
603 stats_tree_tick_pivot(st, st_node_packet_types,
604 val_to_str(pi->ancp_mtype, mtype_names,
605 "Unknown packet type (%d)"));
606 if (pi->ancp_mtype == ANCP_MTYPE_ADJ)
607 stats_tree_tick_pivot(st, st_node_adj_pack_types,
608 val_to_str(pi->ancp_adjcode, adj_code_names,
609 "Unknown Adjacency packet (%d)"));
610 return TAP_PACKET_REDRAW;
611 }
612
613 static int
dissect_ancp_message(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,void * data _U_)614 dissect_ancp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
615 {
616 gint offset;
617 guint8 mtype;
618 struct ancp_tap_t *ancp_info;
619 proto_item *ti;
620 proto_item *sti;
621 proto_item *tti = NULL;
622 proto_tree *ancp_tree;
623 proto_tree *tlv_tree;
624 guint8 byte;
625 guint16 len;
626
627 offset = 0;
628 if (tvb_get_ntohs(tvb, offset) != ANCP_GSMP_ETHER_TYPE)
629 return 0; /* XXX: this dissector is not a heuristic dissector */
630 /* Should do "expert" & dissect rest as "data" */
631 /* (after setting COL_PROTOCOL & etc) ? */
632
633 col_set_str(pinfo->cinfo, COL_PROTOCOL, "ANCP");
634 col_clear(pinfo->cinfo, COL_INFO);
635
636 ancp_info = wmem_new(pinfo->pool, struct ancp_tap_t);
637 ancp_info->ancp_mtype = 0;
638 ancp_info->ancp_adjcode = 0;
639
640 ti = proto_tree_add_item(tree, proto_ancp, tvb, 0, -1, ENC_NA);
641
642 ancp_tree = proto_item_add_subtree(ti, ett_ancp_len);
643
644 offset = 2; /* skip ether type */
645
646 proto_tree_add_item(ancp_tree, hf_ancp_len, tvb, offset, 2, ENC_BIG_ENDIAN);
647 len = tvb_get_ntohs(tvb, offset);
648 offset += 2;
649
650 sti = proto_tree_add_item(ancp_tree, hf_ancp_ver, tvb, offset, 1, ENC_BIG_ENDIAN);
651 byte = tvb_get_guint8(tvb, offset);
652 offset += 1;
653 proto_item_append_text(sti, " (%d.%d)", byte >> 4, byte & 0x0F);
654
655 sti = proto_tree_add_item(ancp_tree, hf_ancp_mtype, tvb, offset, 1, ENC_BIG_ENDIAN);
656 mtype = tvb_get_guint8(tvb, offset); /* ANCP message type */
657 ancp_info->ancp_mtype = mtype; /* stats */
658 offset += 1;
659
660 col_add_fstr(pinfo->cinfo, COL_INFO, "%s Message",
661 val_to_str(mtype, mtype_names, "Unknown (0x%02x)"));
662
663 if (mtype != ANCP_MTYPE_ADJ) {
664 /* Dissect common header */
665 proto_tree_add_item(ancp_tree, hf_ancp_result, tvb, offset, 1,
666 ENC_BIG_ENDIAN); /* treat as 1B, but don't change offset */
667
668 proto_tree_add_item(ancp_tree, hf_ancp_code, tvb, offset, 2,
669 ENC_BIG_ENDIAN);
670 offset += 2;
671
672 proto_tree_add_item(ancp_tree, hf_ancp_p_id, tvb, offset,
673 1, ENC_BIG_ENDIAN);
674 offset += 1;
675
676 proto_tree_add_item(ancp_tree, hf_ancp_trans_id, tvb,
677 offset, 3, ENC_BIG_ENDIAN);
678 offset += 3;
679
680 proto_tree_add_item(ancp_tree, hf_ancp_i_flag, tvb, offset, 1,
681 ENC_BIG_ENDIAN); /* treat as 1B, but don't change offset */
682
683 proto_tree_add_item(ancp_tree, hf_ancp_submsg_num, tvb,
684 offset, 2, ENC_BIG_ENDIAN);
685 offset += 2;
686
687 tti = proto_tree_add_item(ancp_tree, hf_ancp_len2, tvb, offset,
688 2, ENC_BIG_ENDIAN);
689 offset += 2; /* Length */
690 }
691
692 switch(mtype) {
693 case ANCP_MTYPE_ADJ:
694 dissect_ancp_adj_msg(tvb, pinfo, ancp_tree, offset, ancp_info);
695 break;
696 case ANCP_MTYPE_PORT_DN:
697 /* FALL THRU */
698 case ANCP_MTYPE_PORT_MGMT:
699 /* FALL THRU */
700 case ANCP_MTYPE_PORT_UP:
701 dissect_ancp_port_up_dn_mgmt(tvb, ancp_tree, offset, mtype);
702 break;
703 case ANCP_MTYPE_PROV:
704 /* FALL THRU */
705 case ANCP_MTYPE_GEN_RSP:
706 tlv_tree = proto_item_add_subtree(tti, ett_ancp_len);
707
708 while( offset < len + 4) {
709 offset = dissect_ancp_tlv(tvb, tlv_tree, offset);
710 }
711 break;
712 case ANCP_MTYPE_ADJ_UPD:
713 break;
714 default:
715 proto_item_append_text(sti, " (Unknown Message %d)", mtype);
716 break;
717 }
718 tap_queue_packet(ancp_tap, pinfo, ancp_info);
719
720 return tvb_reported_length(tvb);
721 }
722
723 static guint
get_ancp_msg_len(packet_info * pinfo _U_,tvbuff_t * tvb,int offset,void * data _U_)724 get_ancp_msg_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset, void *data _U_)
725 {
726 return (guint)tvb_get_ntohs(tvb, offset + 2) + 4; /* 2B len + 4B hdr */
727 }
728
729 static int
dissect_ancp(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,void * data)730 dissect_ancp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
731 {
732 tcp_dissect_pdus(tvb, pinfo, tree, TRUE, ANCP_MIN_HDR,
733 get_ancp_msg_len, dissect_ancp_message, data);
734
735 return tvb_reported_length(tvb);
736 }
737
738 void
proto_register_ancp(void)739 proto_register_ancp(void)
740 {
741 static hf_register_info hf[] = {
742 { &hf_ancp_len,
743 { "Length", "ancp.len",
744 FT_UINT16, BASE_DEC,
745 NULL, 0x0,
746 NULL, HFILL }
747 },
748 { &hf_ancp_len2,
749 { "Length", "ancp.len2",
750 FT_UINT16, BASE_DEC,
751 NULL, 0x0,
752 NULL, HFILL }
753 },
754 { &hf_ancp_ver,
755 { "Version", "ancp.ver",
756 FT_UINT8, BASE_HEX,
757 NULL, 0x0,
758 NULL, HFILL }
759 },
760 { &hf_ancp_mtype,
761 { "Message Type", "ancp.mtype",
762 FT_UINT8, BASE_DEC,
763 VALS(mtype_names), 0x0,
764 NULL, HFILL }
765 },
766 { &hf_ancp_timer,
767 { "Timer", "ancp.timer",
768 FT_UINT8, BASE_DEC|BASE_UNIT_STRING,
769 &units_milliseconds, 0x0,
770 NULL, HFILL }
771 },
772 { &hf_ancp_adj_code,
773 { "Code", "ancp.adjcode", /* this is diff from code */
774 FT_UINT8, BASE_DEC, /* for Adjacency msg only */
775 NULL, ADJ_CODE_MASK,
776 NULL, HFILL }
777 },
778 { &hf_ancp_sender_name,
779 { "Sender Name", "ancp.sender_name",
780 FT_ETHER, BASE_NONE,
781 NULL, 0x0,
782 NULL, HFILL }
783 },
784 { &hf_ancp_receiver_name,
785 { "Receiver Name", "ancp.receiver_name",
786 FT_ETHER, BASE_NONE,
787 NULL, 0x0,
788 NULL, HFILL }
789 },
790 { &hf_ancp_sender_port,
791 { "Sender Port", "ancp.sender_port",
792 FT_UINT64, BASE_DEC,
793 NULL, 0x0,
794 NULL, HFILL }
795 },
796 { &hf_ancp_receiver_port,
797 { "Receiver Port", "ancp.receiver_port",
798 FT_UINT64, BASE_DEC,
799 NULL, 0x0,
800 NULL, HFILL }
801 },
802 { &hf_ancp_p_info,
803 { "Partition Info", "ancp.partition_info",
804 FT_UINT8, BASE_HEX,
805 NULL, 0x0,
806 NULL, HFILL }
807 },
808 { &hf_ancp_sender_instance,
809 { "Sender Instance", "ancp.sender_instance",
810 FT_UINT24, BASE_DEC,
811 NULL, 0x0,
812 NULL, HFILL }
813 },
814 { &hf_ancp_p_id,
815 { "Partition ID", "ancp.partition_id",
816 FT_UINT8, BASE_DEC,
817 NULL, 0x0,
818 NULL, HFILL }
819 },
820 { &hf_ancp_receiver_instance,
821 { "Receiver Instance", "ancp.receiver_instance",
822 FT_UINT24, BASE_DEC,
823 NULL, 0x0,
824 NULL, HFILL }
825 },
826 { &hf_ancp_tech_type,
827 { "Tech Type", "ancp.tech_type",
828 FT_UINT8, BASE_DEC,
829 VALS(techtype_str), 0x0,
830 NULL, HFILL }
831 },
832 { &hf_ancp_num_tlvs,
833 { "Num TLVs", "ancp.num_tlvs",
834 FT_UINT8, BASE_DEC,
835 NULL, 0x0,
836 NULL, HFILL }
837 },
838 { &hf_ancp_tot_len,
839 { "Length", "ancp.tot_len", /* name just Len to reuse*/
840 FT_UINT16, BASE_DEC,
841 NULL, 0x0,
842 NULL, HFILL }
843 },
844 { &hf_ancp_cap,
845 { "Capability", "ancp.capability",
846 FT_UINT16, BASE_DEC,
847 VALS(captype_names), 0x0,
848 NULL, HFILL }
849 },
850 { &hf_ancp_result,
851 { "Result", "ancp.result",
852 FT_UINT8, BASE_DEC,
853 VALS(resulttype_names), ANCP_RESULT_MASK,
854 NULL, HFILL }
855 },
856 { &hf_ancp_code,
857 { "Code", "ancp.code",
858 FT_UINT16, BASE_HEX,
859 VALS(codetype_names), ANCP_CODE_MASK,
860 NULL, HFILL }
861 },
862 { &hf_ancp_trans_id,
863 { "Transaction ID", "ancp.transaction_id",
864 FT_UINT24, BASE_DEC,
865 NULL, 0x0,
866 NULL, HFILL }
867 },
868 { &hf_ancp_i_flag,
869 { "I Flag", "ancp.i_flag",
870 FT_BOOLEAN, 8,
871 TFS(&tfs_set_notset), ANCP_I_FLAG_MASK,
872 NULL, HFILL }
873 },
874 { &hf_ancp_submsg_num,
875 { "SubMessage Number", "ancp.submessage_number",
876 FT_UINT16, BASE_DEC,
877 NULL, ANCP_SUBMSG_MASK,
878 NULL, HFILL }
879 },
880 { &hf_ancp_pudm_unused,
881 { "Unused Bytes", "ancp.unused",
882 FT_BYTES, BASE_NONE,
883 NULL, 0x0,
884 NULL, HFILL }
885 },
886 { &hf_ancp_function,
887 { "Function", "ancp.function",
888 FT_UINT8, BASE_DEC,
889 VALS(function_names), 0x0,
890 NULL, HFILL }
891 },
892 { &hf_ancp_x_function,
893 { "X-Function", "ancp.x_function",
894 FT_UINT8, BASE_DEC,
895 NULL, 0x0,
896 NULL, HFILL }
897 },
898 { &hf_ancp_ext_flags_res,
899 { "Extension Flags Reserved", "ancp.ext_flags",
900 FT_BYTES, BASE_NONE,
901 NULL, 0x0,
902 NULL, HFILL }
903 },
904 { &hf_ancp_reserved,
905 { "Reserved", "ancp.reserved",
906 FT_BYTES, BASE_NONE,
907 NULL, 0x0,
908 NULL, HFILL }
909 },
910 { &hf_ancp_blk_len,
911 { "Block Length", "ancp.blk_len",
912 FT_UINT16, BASE_DEC,
913 NULL, 0x0,
914 NULL, HFILL }
915 },
916 { &hf_ancp_num_ext_tlvs,
917 { "Num TLVs", "ancp.ext_tlvs.count",
918 FT_UINT16, BASE_DEC,
919 NULL, 0x0,
920 NULL, HFILL }
921 },
922 { &hf_ancp_ext_tlv_type,
923 { "TLV Type", "ancp.ext_tlv.type",
924 FT_UINT16, BASE_DEC|BASE_EXT_STRING,
925 &ext_tlv_types_ext, 0x0,
926 NULL, HFILL }
927 },
928 { &hf_ancp_ext_tlv_len,
929 { "TLV Length", "ancp.ext_tlv.len",
930 FT_UINT16, BASE_DEC,
931 NULL, 0x0,
932 NULL, HFILL }
933 },
934 { &hf_ancp_dsl_line_stlv_type,
935 { "Sub-TLV", "ancp.sub_tlv_type",
936 FT_UINT16, BASE_HEX,
937 VALS(dsl_line_attrs), 0x0,
938 NULL, HFILL }
939 },
940 { &hf_ancp_dsl_line_stlv_len,
941 { "Sub-TLV Length", "ancp.sub_tlv_len",
942 FT_UINT16, BASE_DEC,
943 NULL, 0x0,
944 NULL, HFILL }
945 },
946 { &hf_ancp_dsl_line_stlv_value,
947 { "Value", "ancp.dsl_line_param",
948 FT_UINT32, BASE_DEC,
949 NULL, 0x0,
950 NULL, HFILL }
951 },
952 { &hf_ancp_ext_tlv_value_str,
953 { "Value", "ancp.ext_tlv.value",
954 FT_STRING, BASE_NONE,
955 NULL, 0x0,
956 NULL, HFILL }
957 },
958 { &hf_ancp_oam_opaque,
959 { "Opaque", "ancp.oam.opaque", /* There will be 2 such 32b vals */
960 FT_UINT32, BASE_DEC,
961 NULL, 0x0,
962 NULL, HFILL }
963 },
964 { &hf_ancp_oam_loopb_cnt,
965 { "OAM Loopback Count", "ancp.oam.loopback_count",
966 FT_UINT8, BASE_DEC,
967 NULL, 0x0,
968 NULL, HFILL }
969 },
970 { &hf_ancp_oam_timeout,
971 { "OAM Timeout", "ancp.oam.timeout",
972 FT_UINT8, BASE_DEC,
973 NULL, 0x0,
974 NULL, HFILL }
975 },
976 };
977
978 /* Setup protocol subtree array */
979 static gint *ett[] = {
980 &ett_ancp_len,
981 &ett_ancp_ver,
982 &ett_ancp_mtype,
983 &ett_ancp_timer,
984 &ett_ancp_adj_code,
985 &ett_ancp_sender_name,
986 &ett_ancp_receiver_name,
987 &ett_ancp_sender_port,
988 &ett_ancp_receiver_port,
989 &ett_ancp_p_info,
990 &ett_ancp_sender_instance,
991 &ett_ancp_p_id,
992 &ett_ancp_receiver_instance,
993 &ett_ancp_tech_type,
994 &ett_ancp_num_tlvs,
995 &ett_ancp_tot_len,
996 &ett_ancp_cap,
997 &ett_ancp_result,
998 &ett_ancp_code,
999 &ett_ancp_trans_id,
1000 &ett_ancp_i_flag,
1001 &ett_ancp_submsg_num,
1002 &ett_ancp_port,
1003 &ett_ancp_port_sess_num,
1004 &ett_ancp_evt_seq_num,
1005 &ett_ancp_label,
1006 &ett_ancp_reserved,
1007 &ett_ancp_blk_len,
1008 &ett_ancp_num_ext_tlvs,
1009 &ett_ancp_ext_tlv_type,
1010 &ett_ancp_dsl_line_stlv_type,
1011 &ett_ancp_dsl_line_stlv_val,
1012 &ett_ancp_ext_tlv_value_str,
1013 &ett_ancp_oam_opaque,
1014 &ett_ancp_oam_loopb_cnt,
1015 &ett_ancp_oam_timeout,
1016 };
1017
1018 proto_ancp = proto_register_protocol (
1019 "Access Node Control Protocol",
1020 "ANCP",
1021 "ancp"
1022 );
1023
1024 proto_register_field_array(proto_ancp, hf, array_length(hf));
1025 proto_register_subtree_array(ett, array_length(ett));
1026 ancp_tap = register_tap("ancp");
1027 }
1028
1029 void
proto_reg_handoff_ancp(void)1030 proto_reg_handoff_ancp(void)
1031 {
1032 dissector_handle_t ancp_handle;
1033
1034 ancp_handle = create_dissector_handle(dissect_ancp, proto_ancp);
1035 dissector_add_uint_with_preference("tcp.port", ANCP_PORT, ancp_handle);
1036 stats_tree_register("ancp", "ancp", "ANCP", 0,
1037 ancp_stats_tree_packet, ancp_stats_tree_init, NULL);
1038 }
1039
1040 /*
1041 * Editor modelines - https://www.wireshark.org/tools/modelines.html
1042 *
1043 * Local variables:
1044 * c-basic-offset: 4
1045 * tab-width: 8
1046 * indent-tabs-mode: nil
1047 * End:
1048 *
1049 * vi: set shiftwidth=4 tabstop=8 expandtab:
1050 * :indentSize=4:tabSize=8:noTabs=true:
1051 */
1052