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HACK: pinfo->private_data points to smb_info again
[wireshark-wip.git] / epan / dissectors / packet-pppoe.c
blobce277ba05fb0135840ec2a5eb40b0361e8205ada
1 /* packet-pppoe.c
2 * Routines for PPP Over Ethernet (PPPoE) packet disassembly (RFC2516)
3 * Up to date with http://www.iana.org/assignments/pppoe-parameters (2008-04-30)
4 *
5 * $Id$
6 *
7 * Wireshark - Network traffic analyzer
8 * By Gerald Combs <gerald@wireshark.org>
9 * Copyright 1998 Gerald Combs
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 */
25
26 #include "config.h"
27
28 #include <glib.h>
29 #include <epan/packet.h>
30 #include <epan/strutil.h>
31 #include <epan/etypes.h>
32 #include <epan/prefs.h>
33 #include <epan/expert.h>
34 #include <epan/ppptypes.h>
35
36 static int proto_pppoed = -1;
37
38 /* Common to session and discovery protocols */
39 static gint hf_pppoe_version = -1;
40 static gint hf_pppoe_type = -1;
41 static gint hf_pppoe_code = -1;
42 static gint hf_pppoe_session_id = -1;
43 static gint hf_pppoe_payload_length = -1;
44
45 /* Discovery protocol fields */
46 static gint hf_pppoed_tags = -1;
47 static gint hf_pppoed_tag = -1;
48 static gint hf_pppoed_tag_length = -1;
49 static gint hf_pppoed_tag_length_8 = -1;
50 static gint hf_pppoed_tag_unknown_data = -1;
51 static gint hf_pppoed_tag_service_name = -1;
52 static gint hf_pppoed_tag_ac_name = -1;
53 static gint hf_pppoed_tag_host_uniq = -1;
54 static gint hf_pppoed_tag_ac_cookie = -1;
55 static gint hf_pppoed_tag_vendor_id = -1;
56 static gint hf_pppoed_tag_vendor_unspecified = -1;
57 static gint hf_pppoed_tag_vspec_tags = -1;
58 static gint hf_pppoed_tag_vspec_tag = -1;
59 static gint hf_pppoed_tag_vspec_circuit_id = -1;
60 static gint hf_pppoed_tag_vspec_remote_id = -1;
61 static gint hf_pppoed_tag_vspec_act_data_rate_up = -1;
62 static gint hf_pppoed_tag_vspec_act_data_rate_down = -1;
63 static gint hf_pppoed_tag_vspec_min_data_rate_up = -1;
64 static gint hf_pppoed_tag_vspec_min_data_rate_down = -1;
65 static gint hf_pppoed_tag_vspec_attainable_data_rate_up = -1;
66 static gint hf_pppoed_tag_vspec_attainable_data_rate_down = -1;
67 static gint hf_pppoed_tag_vspec_max_data_rate_up = -1;
68 static gint hf_pppoed_tag_vspec_max_data_rate_down = -1;
69 static gint hf_pppoed_tag_vspec_min_data_rate_up_lp = -1;
70 static gint hf_pppoed_tag_vspec_min_data_rate_down_lp = -1;
71 static gint hf_pppoed_tag_vspec_max_int_delay_up = -1;
72 static gint hf_pppoed_tag_vspec_act_int_delay_up = -1;
73 static gint hf_pppoed_tag_vspec_max_int_delay_down = -1;
74 static gint hf_pppoed_tag_vspec_act_int_delay_down = -1;
75 static gint hf_pppoed_tag_vspec_access_loop_encapsulation = -1;
76 static gint hf_pppoed_tag_vspec_access_loop_encap_data_link = -1;
77 static gint hf_pppoed_tag_vspec_access_loop_encap_encap_1 = -1;
78 static gint hf_pppoed_tag_vspec_access_loop_encap_encap_2 = -1;
79 static gint hf_pppoed_tag_credits = -1;
80 static gint hf_pppoed_tag_credits_fcn = -1;
81 static gint hf_pppoed_tag_credits_bcn = -1;
82 static gint hf_pppoed_tag_metrics = -1;
83 static gint hf_pppoed_tag_metrics_r = -1;
84 static gint hf_pppoed_tag_metrics_rlq = -1;
85 static gint hf_pppoed_tag_metrics_resource = -1;
86 static gint hf_pppoed_tag_metrics_latency = -1;
87 static gint hf_pppoed_tag_metrics_curr_drate = -1;
88 static gint hf_pppoed_tag_metrics_max_drate = -1;
89 static gint hf_pppoed_tag_mdr_units = -1;
90 static gint hf_pppoed_tag_cdr_units = -1;
91 static gint hf_pppoed_tag_seq_num = -1;
92 static gint hf_pppoed_tag_cred_scale = -1;
93 static gint hf_pppoed_tag_relay_session_id = -1;
94 static gint hf_pppoed_tag_hurl = -1;
95 static gint hf_pppoed_tag_motm = -1;
96 static gint hf_pppoed_tag_max_payload = -1;
97 static gint hf_pppoed_tag_ip_route_add = -1;
98 static gint hf_pppoed_tag_service_name_error = -1;
99 static gint hf_pppoed_tag_ac_system_error = -1;
100 static gint hf_pppoed_tag_generic_error = -1;
101
102 /* Session protocol fields */
103 static gint hf_pppoes_tags = -1;
104 /* static gint hf_pppoes_tag = -1; */
105 /* static gint hf_pppoes_tag_credits = -1; */
106 static gint hf_pppoes_tag_credits_fcn = -1;
107 static gint hf_pppoes_tag_credits_bcn = -1;
108
109 /* Session protocol fields */
110
111 static gint ett_pppoed = -1;
112 static gint ett_pppoed_tags = -1;
113 static gint ett_pppoed_tag_vspec_dslf_access_loop_encaps = -1;
114
115 static int proto_pppoes = -1;
116
117 static gint ett_pppoes = -1;
118 static gint ett_pppoes_tags = -1;
119
120 static expert_field ei_pppoe_payload_length = EI_INIT;
121 static expert_field ei_pppoe_tag_length = EI_INIT;
122
123 /* PPPoE parent fields */
124
125 static int proto_pppoe = -1;
126 static gint ett_pppoe = -1;
127
128
129 /* Handle for calling for ppp dissector to handle session data */
130 static dissector_handle_t ppp_handle;
131
132
133 /* Preference for showing discovery tag values and lengths */
134 static gboolean global_pppoe_show_tags_and_lengths = FALSE;
135
136
137 #define PPPOE_CODE_SESSION 0x00
138 #define PPPOE_CODE_PADO 0x07
139 #define PPPOE_CODE_PADI 0x09
140 #define PPPOE_CODE_PADG 0x0a
141 #define PPPOE_CODE_PADC 0x0b
142 #define PPPOE_CODE_PADQ 0x0c
143 #define PPPOE_CODE_PADR 0x19
144 #define PPPOE_CODE_PADS 0x65
145 #define PPPOE_CODE_PADT 0xa7
146 #define PPPOE_CODE_PADM 0xd3
147 #define PPPOE_CODE_PADN 0xd4
148
149 #define PPPOE_TAG_EOL 0x0000
150 #define PPPOE_TAG_SVC_NAME 0x0101
151 #define PPPOE_TAG_AC_NAME 0x0102
152 #define PPPOE_TAG_HOST_UNIQ 0x0103
153 #define PPPOE_TAG_AC_COOKIE 0x0104
154 #define PPPOE_TAG_VENDOR 0x0105
155 #define PPPOE_TAG_CREDITS 0x0106
156 #define PPPOE_TAG_METRICS 0x0107
157 #define PPPOE_TAG_SEQ_NUM 0x0108
158 #define PPPOE_TAG_CRED_SCALE 0x0109
159 #define PPPOE_TAG_RELAY_ID 0x0110
160 #define PPPOE_TAG_HURL 0x0111
161 #define PPPOE_TAG_MOTM 0x0112
162 #define PPPOE_TAG_MAX_PAYLD 0x0120
163 #define PPPOE_TAG_IP_RT_ADD 0x0121
164 #define PPPOE_TAG_SVC_ERR 0x0201
165 #define PPPOE_TAG_AC_ERR 0x0202
166 #define PPPOE_TAG_GENERIC_ERR 0x0203
167
168 #define PPPOE_VENDOR_ID_DSLF 3561
169
170 #define PPPOE_TAG_VSPEC_DSLF_CIRCUIT_ID 0x01
171 #define PPPOE_TAG_VSPEC_DSLF_REMOTE_ID 0x02
172 #define PPPOE_TAG_VSPEC_DSLF_ACT_DATA_RATE_UP 0x81
173 #define PPPOE_TAG_VSPEC_DSLF_ACT_DATA_RATE_DOWN 0x82
174 #define PPPOE_TAG_VSPEC_DSLF_MIN_DATA_RATE_UP 0x83
175 #define PPPOE_TAG_VSPEC_DSLF_MIN_DATA_RATE_DOWN 0x84
176 #define PPPOE_TAG_VSPEC_DSLF_ATTAINABLE_DATA_RATE_UP 0x85
177 #define PPPOE_TAG_VSPEC_DSLF_ATTAINABLE_DATA_RATE_DOWN 0x86
178 #define PPPOE_TAG_VSPEC_DSLF_MAX_DATA_RATE_UP 0x87
179 #define PPPOE_TAG_VSPEC_DSLF_MAX_DATA_RATE_DOWN 0x88
180 #define PPPOE_TAG_VSPEC_DSLF_MIN_DATA_RATE_UP_LP 0x89
181 #define PPPOE_TAG_VSPEC_DSLF_MIN_DATA_RATE_DOWN_LP 0x8a
182 #define PPPOE_TAG_VSPEC_DSLF_MAX_INT_DELAY_UP 0x8b
183 #define PPPOE_TAG_VSPEC_DSLF_ACT_INT_DELAY_UP 0x8c
184 #define PPPOE_TAG_VSPEC_DSLF_MAX_INT_DELAY_DOWN 0x8d
185 #define PPPOE_TAG_VSPEC_DSLF_ACT_INT_DELAY_DOWN 0x8e
186 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAPSULATION 0x90
187
188 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_DATA_LINK_ATM 0x00
189 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_DATA_LINK_ETH 0x01
190
191 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_1_NA 0x00
192 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_1_UNTAGGED_ETH 0x01
193 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_1_SINLE_TAGGED_ETH 0x02
194
195 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_NA 0x00
196 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_PPPOA_LLC 0x01
197 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_PPPOA_NULL 0x02
198 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_IPOA_LLC 0x03
199 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_IPOA_NULL 0x04
200 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_ETH_OVER_AAL5_LLC_WITH_FCS 0x05
201 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_ETH_OVER_AAL5_LLC_WITHOUT_FCS 0x06
202 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_ETH_OVER_AAL5_NULL_WITH_FCS 0x07
203 #define PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_ETH_OVER_AAL5_NULL_WITHOUT_FCS 0x08
204
205 #define PPPOE_CDR_MASK 0x06
206 #define PPPOE_MDR_MASK 0x18
207 #define PPPOE_RCV_ONLY_MASK 0x01
208
209 #define PPPOE_SCALE_KBPS 0x00
210 #define PPPOE_SCALE_MBPS 0x01
211 #define PPPOE_SCALE_GBPS 0x02
212 #define PPPOE_SCALE_TBPS 0x03
213
214
215 static const value_string code_vals[] = {
216 {PPPOE_CODE_SESSION, "Session Data" },
217 {PPPOE_CODE_PADO, "Active Discovery Offer (PADO)" },
218 {PPPOE_CODE_PADI, "Active Discovery Initiation (PADI)" },
219 {PPPOE_CODE_PADG, "Active Discovery Session-Grant (PADG)" },
220 {PPPOE_CODE_PADC, "Active Discovery Session-Credit Resp.(PADC)" },
221 {PPPOE_CODE_PADQ, "Active Discovery Quality (PADQ)" },
222 {PPPOE_CODE_PADR, "Active Discovery Request (PADR)" },
223 {PPPOE_CODE_PADS, "Active Discovery Session-confirmation (PADS)"},
224 {PPPOE_CODE_PADT, "Active Discovery Terminate (PADT)" },
225 {PPPOE_CODE_PADM, "Active Discovery Message (PADM)" },
226 {PPPOE_CODE_PADN, "Active Discovery Network (PADN)" },
227 {0, NULL }
228 };
229
230
231 static const value_string tag_vals[] = {
232 {PPPOE_TAG_EOL, "End-Of-List" },
233 {PPPOE_TAG_SVC_NAME, "Service-Name" },
234 {PPPOE_TAG_AC_NAME, "AC-Name" },
235 {PPPOE_TAG_HOST_UNIQ, "Host-Uniq" },
236 {PPPOE_TAG_AC_COOKIE, "AC-Cookie" },
237 {PPPOE_TAG_VENDOR, "Vendor-Specific" },
238 {PPPOE_TAG_CREDITS, "Credits" },
239 {PPPOE_TAG_METRICS, "Metrics" },
240 {PPPOE_TAG_SEQ_NUM, "Sequence Number" },
241 {PPPOE_TAG_CRED_SCALE, "Credit Scale Factor"},
242 {PPPOE_TAG_RELAY_ID, "Relay-Session-Id" },
243 {PPPOE_TAG_HURL, "HURL" },
244 {PPPOE_TAG_MOTM, "MOTM" },
245 {PPPOE_TAG_MAX_PAYLD, "PPP-Max-Payload" },
246 {PPPOE_TAG_IP_RT_ADD, "IP Route Add" },
247 {PPPOE_TAG_SVC_ERR, "Service-Name-Error"},
248 {PPPOE_TAG_AC_ERR, "AC-System-Error" },
249 {PPPOE_TAG_GENERIC_ERR,"Generic-Error" },
250 {0, NULL }
251 };
252
253 static const value_string vspec_tag_vals[] = {
254 {PPPOE_TAG_VSPEC_DSLF_CIRCUIT_ID, "Circuit-ID" },
255 {PPPOE_TAG_VSPEC_DSLF_REMOTE_ID, "Remote-ID" },
256 {PPPOE_TAG_VSPEC_DSLF_ACT_DATA_RATE_UP, "Actual-Data-Rate-Up" },
257 {PPPOE_TAG_VSPEC_DSLF_ACT_DATA_RATE_DOWN, "Actual-Data-Rate-Down" },
258 {PPPOE_TAG_VSPEC_DSLF_MIN_DATA_RATE_UP, "Min-Data-Rate-Up" },
259 {PPPOE_TAG_VSPEC_DSLF_MIN_DATA_RATE_DOWN, "Min-Data-Rate-Down" },
260 {PPPOE_TAG_VSPEC_DSLF_ATTAINABLE_DATA_RATE_UP, "Attainable-Data-Rate-Up" },
261 {PPPOE_TAG_VSPEC_DSLF_ATTAINABLE_DATA_RATE_DOWN, "Attainable-Data-Rate-Down" },
262 {PPPOE_TAG_VSPEC_DSLF_MAX_DATA_RATE_UP, "Max-Data-Rate-Up" },
263 {PPPOE_TAG_VSPEC_DSLF_MAX_DATA_RATE_DOWN, "Max-Data-Rate-Down" },
264 {PPPOE_TAG_VSPEC_DSLF_MIN_DATA_RATE_UP_LP, "Min-Data-Rate-Up-Low-Power" },
265 {PPPOE_TAG_VSPEC_DSLF_MIN_DATA_RATE_DOWN_LP, "Min-Data-Rate-Down-Low-Power" },
266 {PPPOE_TAG_VSPEC_DSLF_MAX_INT_DELAY_UP, "Max-Interleaving-Delay-Up" },
267 {PPPOE_TAG_VSPEC_DSLF_ACT_INT_DELAY_UP, "Actual-Interleaving-Delay-Up" },
268 {PPPOE_TAG_VSPEC_DSLF_MAX_INT_DELAY_DOWN, "Max-Interleaving-Delay-Down" },
269 {PPPOE_TAG_VSPEC_DSLF_ACT_INT_DELAY_DOWN, "Actual-Interleaving-Delay-Down"},
270 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAPSULATION, "Access-Loop-Encapsulation" },
271 {0, NULL }
272 };
273
274 static const value_string vspec_tag_dslf_access_loop_encap_data_link_vals[] = {
275 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_DATA_LINK_ATM, "ATM AAL5"},
276 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_DATA_LINK_ETH, "Ethernet"},
277 {0, NULL }
278 };
279
280 static const value_string vspec_tag_dslf_access_loop_encap_encap_1_vals[] = {
281 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_1_NA, "NA" },
282 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_1_UNTAGGED_ETH, "Untagged Ethernet" },
283 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_1_SINLE_TAGGED_ETH, "Single-tagged Ethernet"},
284 {0, NULL }
285 };
286
287 static const value_string vspec_tag_dslf_access_loop_encap_encap_2_vals[] = {
288 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_NA, "NA" },
289 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_PPPOA_LLC, "PPPoA LLC" },
290 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_PPPOA_NULL, "PPPoA Null" },
291 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_IPOA_LLC, "IPoA LLC" },
292 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_IPOA_NULL, "IPoA Null" },
293 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_ETH_OVER_AAL5_LLC_WITH_FCS, "Ethernet over AAL5 LLC w FCS" },
294 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_ETH_OVER_AAL5_LLC_WITHOUT_FCS, "Ethernet over AAL5 LLC w/o FCS" },
295 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_ETH_OVER_AAL5_NULL_WITH_FCS, "Ethernet over AAL5 Null w FCS" },
296 {PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAP_ENCAPS_2_ETH_OVER_AAL5_NULL_WITHOUT_FCS,"Ethernet over AAL5 Null w/o FCS"},
297 {0, NULL }
298 };
299
300 static const value_string datarate_scale_vals[] = {
301 {PPPOE_SCALE_KBPS, "kilobits per second"},
302 {PPPOE_SCALE_MBPS, "megabits per second"},
303 {PPPOE_SCALE_GBPS, "gigabits per second"},
304 {PPPOE_SCALE_TBPS, "terabits per second"},
305 {0, NULL }
306 };
307
308
309 #define CASE_VSPEC_DSLF_TAG_UINT(tag_name, relation, length, hf_var) case tag_name: \
310 if (!(poe_tag_length relation length)) { \
311 expert_add_info_format(pinfo, pppoe_tree, &ei_pppoe_tag_length, \
312 "%s: Wrong length: %u (expected %s %d)", \
313 val_to_str_const(poe_tag, vspec_tag_vals, "Unknown"), poe_tag_length, #relation, length); \
314 } else { \
315 proto_tree_add_item(pppoe_tree, hf_var, tvb, \
316 tagstart+2, poe_tag_length, ENC_BIG_ENDIAN); \
317 } \
318 break;
319
320 #define CASE_VSPEC_DSLF_TAG_STRING(tag_name, relation, length, hf_var) case tag_name: \
321 if (!(poe_tag_length relation length)) { \
322 expert_add_info_format(pinfo, pppoe_tree, &ei_pppoe_tag_length, \
323 "%s: Wrong length: %u (expected %s %d)", \
324 val_to_str_const(poe_tag, vspec_tag_vals, "Unknown"), poe_tag_length, #relation, length); \
325 } else { \
326 proto_tree_add_item(pppoe_tree, hf_var, tvb, \
327 tagstart+2, poe_tag_length, ENC_ASCII|ENC_NA); \
328 } \
329 break;
330
331 /* Dissect Vendor-Specific Tags introduced by the DSLF */
332 static void
333 dissect_pppoe_subtags_dslf(tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree,
334 int payload_length)
335 {
336 guint8 poe_tag;
337 guint8 poe_tag_length;
338 int tagstart;
339
340 proto_tree *pppoe_tree, *ti, *encaps_tree;
341
342 /* Start Decoding Here. */
343 if (tree)
344 {
345 /* Create tags subtree */
346 ti = proto_tree_add_item(tree, hf_pppoed_tag_vspec_tags, tvb, offset, payload_length, ENC_NA);
347 pppoe_tree = proto_item_add_subtree(ti, ett_pppoed_tags);
348
349 tagstart = offset;
350
351 /* Loop until all data seen or End-Of-List tag found */
352 while (tagstart <= offset + payload_length-2)
353 {
354 poe_tag = tvb_get_guint8(tvb, tagstart);
355 poe_tag_length = tvb_get_guint8(tvb, tagstart + 1);
356
357 /* Tag value and data length */
358 if (global_pppoe_show_tags_and_lengths)
359 {
360 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_vspec_tag, tvb, tagstart, 1, ENC_BIG_ENDIAN);
361 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_length_8, tvb, tagstart+1, 1, ENC_BIG_ENDIAN);
362 }
363
364 /* Show tag data */
365 switch (poe_tag)
366 {
367 CASE_VSPEC_DSLF_TAG_STRING(PPPOE_TAG_VSPEC_DSLF_CIRCUIT_ID, <=, 63,
368 hf_pppoed_tag_vspec_circuit_id)
369 CASE_VSPEC_DSLF_TAG_STRING(PPPOE_TAG_VSPEC_DSLF_REMOTE_ID, <=, 63,
370 hf_pppoed_tag_vspec_remote_id)
371 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_ACT_DATA_RATE_UP, ==, 4,
372 hf_pppoed_tag_vspec_act_data_rate_up)
373 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_ACT_DATA_RATE_DOWN, ==, 4,
374 hf_pppoed_tag_vspec_act_data_rate_down)
375 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_MIN_DATA_RATE_UP, ==, 4,
376 hf_pppoed_tag_vspec_min_data_rate_up)
377 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_MIN_DATA_RATE_DOWN, ==, 4,
378 hf_pppoed_tag_vspec_min_data_rate_down)
379 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_ATTAINABLE_DATA_RATE_UP, ==, 4,
380 hf_pppoed_tag_vspec_attainable_data_rate_up)
381 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_ATTAINABLE_DATA_RATE_DOWN, ==, 4,
382 hf_pppoed_tag_vspec_attainable_data_rate_down)
383 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_MAX_DATA_RATE_UP, ==, 4,
384 hf_pppoed_tag_vspec_max_data_rate_up)
385 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_MAX_DATA_RATE_DOWN, ==, 4,
386 hf_pppoed_tag_vspec_max_data_rate_down)
387 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_MIN_DATA_RATE_UP_LP, ==, 4,
388 hf_pppoed_tag_vspec_min_data_rate_up_lp)
389 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_MIN_DATA_RATE_DOWN_LP, ==, 4,
390 hf_pppoed_tag_vspec_min_data_rate_down_lp)
391 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_MAX_INT_DELAY_UP, ==, 4,
392 hf_pppoed_tag_vspec_max_int_delay_up)
393 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_ACT_INT_DELAY_UP, ==, 4,
394 hf_pppoed_tag_vspec_act_int_delay_up)
395 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_MAX_INT_DELAY_DOWN, ==, 4,
396 hf_pppoed_tag_vspec_max_int_delay_down)
397 CASE_VSPEC_DSLF_TAG_UINT(PPPOE_TAG_VSPEC_DSLF_ACT_INT_DELAY_DOWN, ==, 4,
398 hf_pppoed_tag_vspec_act_int_delay_down)
399 case PPPOE_TAG_VSPEC_DSLF_ACCESS_LOOP_ENCAPSULATION:
400 ti = proto_tree_add_item(pppoe_tree, hf_pppoed_tag_vspec_access_loop_encapsulation, tvb,
401 tagstart+2, 3, ENC_NA);
402 if (poe_tag_length != 3) {
403 expert_add_info_format(pinfo, ti, &ei_pppoe_tag_length, "%s: Wrong length: %u (expected 3)", val_to_str_const(poe_tag, vspec_tag_vals, "Unknown"), poe_tag_length);
404 }
405 encaps_tree = proto_item_add_subtree(ti, ett_pppoed_tag_vspec_dslf_access_loop_encaps);
406 proto_tree_add_item(encaps_tree, hf_pppoed_tag_vspec_access_loop_encap_data_link,
407 tvb, tagstart+2, 1, ENC_BIG_ENDIAN);
408 proto_tree_add_item(encaps_tree, hf_pppoed_tag_vspec_access_loop_encap_encap_1,
409 tvb, tagstart+3, 1, ENC_BIG_ENDIAN);
410 proto_tree_add_item(encaps_tree, hf_pppoed_tag_vspec_access_loop_encap_encap_2,
411 tvb, tagstart+4, 1, ENC_BIG_ENDIAN);
412
413 break;
414 default:
415 if (poe_tag_length > 0 )
416 {
417 /* Presumably unknown tag;
418 show tag value if we didn't do it above */
419 if (!global_pppoe_show_tags_and_lengths)
420 {
421 proto_tree_add_item(pppoe_tree, hf_pppoed_tag, tvb, tagstart, 1, ENC_BIG_ENDIAN);
422 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_length_8, tvb, tagstart+1, 1, ENC_BIG_ENDIAN);
423 }
424 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_unknown_data, tvb,
425 tagstart+1, poe_tag_length, ENC_NA);
426 }
427 }
428
429 tagstart += (2 + poe_tag_length);
430 }
431 }
432 }
433
434
435 /* Dissect discovery protocol tags */
436 static void
437 dissect_pppoe_tags(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *tree,
438 int payload_length)
439 {
440 guint16 poe_tag;
441 guint16 poe_tag_length;
442 int tagstart;
443 guint16 poe_rsv = 0;
444
445 proto_tree *pppoe_tree;
446 proto_item *ti;
447 proto_item *pppoe_tree_tag_length_item = NULL;
448 proto_item *item;
449
450 /* Start Decoding Here. */
451 if (tree)
452 {
453 /* Create tags subtree */
454 ti = proto_tree_add_item(tree, hf_pppoed_tags, tvb, offset, payload_length-6, ENC_NA);
455 pppoe_tree = proto_item_add_subtree(ti, ett_pppoed_tags);
456
457 tagstart = offset;
458
459 /* Loop until all data seen or End-Of-List tag found */
460 while (tagstart <= payload_length-2)
461 {
462 poe_tag = tvb_get_ntohs(tvb, tagstart);
463 poe_tag_length = tvb_get_ntohs(tvb, tagstart + 2);
464
465 /* Tag value and data length */
466 if (global_pppoe_show_tags_and_lengths)
467 {
468 proto_tree_add_item(pppoe_tree, hf_pppoed_tag, tvb, tagstart, 2, ENC_BIG_ENDIAN);
469 pppoe_tree_tag_length_item =
470 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_length, tvb, tagstart+2, 2, ENC_BIG_ENDIAN);
471 }
472
473 /* Show tag data */
474 switch (poe_tag)
475 {
476 case PPPOE_TAG_SVC_NAME:
477 if (poe_tag_length > 0)
478 {
479 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_service_name, tvb,
480 tagstart+4, poe_tag_length, ENC_ASCII|ENC_NA);
481 }
482 break;
483 case PPPOE_TAG_AC_NAME:
484 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_ac_name, tvb,
485 tagstart+4, poe_tag_length, ENC_ASCII|ENC_NA);
486 /* Show AC-Name in info column */
487 col_append_fstr(pinfo->cinfo, COL_INFO, " AC-Name='%s'",
488 tvb_get_string(wmem_packet_scope(), tvb, tagstart+4, poe_tag_length));
489 break;
490 case PPPOE_TAG_HOST_UNIQ:
491 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_host_uniq, tvb,
492 tagstart+4, poe_tag_length, ENC_NA);
493 break;
494 case PPPOE_TAG_AC_COOKIE:
495 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_ac_cookie, tvb,
496 tagstart+4, poe_tag_length, ENC_NA);
497 break;
498 case PPPOE_TAG_VENDOR:
499 if (poe_tag_length >= 4)
500 {
501 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_vendor_id, tvb,
502 tagstart+4, 4, ENC_BIG_ENDIAN);
503 }
504 if (poe_tag_length > 4)
505 {
506 guint32 vendor_id = tvb_get_ntohl(tvb, tagstart+4);
507 switch (vendor_id)
508 {
509 case PPPOE_VENDOR_ID_DSLF:
510 dissect_pppoe_subtags_dslf(tvb,pinfo,tagstart+4+4,pppoe_tree,poe_tag_length-4);
511 break;
512 default:
513 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_vendor_unspecified, tvb,
514 tagstart+4+4, poe_tag_length-4, ENC_NA);
515
516 }
517 }
518 break;
519 case PPPOE_TAG_CREDITS:
520 if (poe_tag_length == 4)
521 {
522 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_credits_fcn, tvb,
523 tagstart+4, 2, ENC_BIG_ENDIAN);
524 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_credits_bcn, tvb,
525 tagstart+6, 2, ENC_BIG_ENDIAN);
526 } else {
527 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_credits, tvb,
528 tagstart+4, poe_tag_length, ENC_NA);
529 }
530 break;
531 case PPPOE_TAG_METRICS:
532 if (poe_tag_length == 10)
533 {
534 poe_rsv = tvb_get_ntohs(tvb, tagstart+4);
535
536 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_mdr_units, tvb,
537 tagstart+4, 2, ENC_BIG_ENDIAN);
538 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_cdr_units, tvb,
539 tagstart+4, 2, ENC_BIG_ENDIAN);
540 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_metrics_r, tvb,
541 tagstart+4, 2, ENC_BIG_ENDIAN);
542 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_metrics_rlq, tvb,
543 tagstart+6, 1, ENC_BIG_ENDIAN);
544 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_metrics_resource, tvb,
545 tagstart+7, 1, ENC_BIG_ENDIAN);
546 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_metrics_latency, tvb,
547 tagstart+8, 2, ENC_BIG_ENDIAN);
548
549 /* CDR */
550 ti = proto_tree_add_item(pppoe_tree, hf_pppoed_tag_metrics_curr_drate, tvb,
551 tagstart+10, 2, ENC_BIG_ENDIAN);
552
553 switch ((poe_rsv & PPPOE_CDR_MASK) >> 1)
554 {
555 case (PPPOE_SCALE_KBPS):
556 proto_item_append_text(ti, " kbps");
557 break;
558 case (PPPOE_SCALE_MBPS):
559 proto_item_append_text(ti, " mbps");
560 break;
561 case (PPPOE_SCALE_GBPS):
562 proto_item_append_text(ti, " gbps");
563 break;
564 case (PPPOE_SCALE_TBPS):
565 proto_item_append_text(ti, " tbps");
566 break;
567 }
568
569 /* MDR */
570 ti = proto_tree_add_item(pppoe_tree, hf_pppoed_tag_metrics_max_drate, tvb,
571 tagstart+12, 2, ENC_BIG_ENDIAN);
572
573 switch ((poe_rsv & PPPOE_MDR_MASK) >> 3)
574 {
575 case (PPPOE_SCALE_KBPS):
576 proto_item_append_text(ti, " kbps");
577 break;
578 case (PPPOE_SCALE_MBPS):
579 proto_item_append_text(ti, " mbps");
580 break;
581 case (PPPOE_SCALE_GBPS):
582 proto_item_append_text(ti, " gbps");
583 break;
584 case (PPPOE_SCALE_TBPS):
585 proto_item_append_text(ti, " tbps");
586 break;
587 }
588
589 } else {
590 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_metrics, tvb,
591 tagstart+4, poe_tag_length, ENC_NA);
592 }
593 break;
594 case PPPOE_TAG_SEQ_NUM:
595 if (poe_tag_length == 2) {
596 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_seq_num, tvb,
597 tagstart+4, poe_tag_length, ENC_BIG_ENDIAN);
598 } else {
599 if (global_pppoe_show_tags_and_lengths) {
600 proto_item_append_text(pppoe_tree_tag_length_item, " [Wrong: should be 2]");
601 item = pppoe_tree_tag_length_item;
602 } else {
603 item = proto_tree_add_text(pppoe_tree, tvb, tagstart+4, poe_tag_length,
604 "%s: Wrong length: %u (expected 2)",
605 proto_registrar_get_name(hf_pppoed_tag_seq_num),
606 poe_tag_length);
607 }
608 expert_add_info_format(pinfo, item, &ei_pppoe_tag_length, "Sequence Number tag: Wrong length: %u (expected 2)", poe_tag_length);
609 }
610 break;
611 case PPPOE_TAG_CRED_SCALE:
612 if (poe_tag_length == 2) {
613 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_cred_scale, tvb,
614 tagstart+4, poe_tag_length, ENC_BIG_ENDIAN);
615 } else {
616 if (global_pppoe_show_tags_and_lengths) {
617 proto_item_append_text(pppoe_tree_tag_length_item, " [Wrong: should be 2]");
618 item = pppoe_tree_tag_length_item;
619 } else {
620 item = proto_tree_add_text(pppoe_tree, tvb, tagstart+4, poe_tag_length,
621 "%s: Wrong length: %u (expected 2)",
622 proto_registrar_get_name(hf_pppoed_tag_cred_scale),
623 poe_tag_length);
624 }
625 expert_add_info_format(pinfo, item, &ei_pppoe_tag_length, "Credit Scale Factor tag: Wrong length: %u (expected 2)", poe_tag_length);
626 }
627 break;
628 case PPPOE_TAG_RELAY_ID:
629 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_relay_session_id, tvb,
630 tagstart+4, poe_tag_length, ENC_NA);
631 break;
632 case PPPOE_TAG_HURL:
633 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_hurl, tvb,
634 tagstart+4, poe_tag_length, ENC_NA);
635 break;
636 case PPPOE_TAG_MOTM:
637 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_motm, tvb,
638 tagstart+4, poe_tag_length, ENC_NA);
639 break;
640 case PPPOE_TAG_MAX_PAYLD:
641 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_max_payload, tvb,
642 tagstart+4, poe_tag_length, ENC_NA);
643 break;
644 case PPPOE_TAG_IP_RT_ADD:
645 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_ip_route_add, tvb,
646 tagstart+4, poe_tag_length, ENC_NA);
647 break;
648
649 /* These error tag values should be interpreted as a utf-8 unterminated
650 strings. */
651 case PPPOE_TAG_SVC_ERR:
652 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_service_name_error, tvb,
653 tagstart+4, poe_tag_length, ENC_ASCII|ENC_NA);
654 break;
655 case PPPOE_TAG_AC_ERR:
656 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_ac_system_error, tvb,
657 tagstart+4, poe_tag_length, ENC_ASCII|ENC_NA);
658 break;
659 case PPPOE_TAG_GENERIC_ERR:
660 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_generic_error, tvb,
661 tagstart+4, poe_tag_length, ENC_ASCII|ENC_NA);
662 break;
663
664 /* Get out if see end-of-list tag */
665 case PPPOE_TAG_EOL:
666 return;
667
668 default:
669 if (poe_tag_length > 0 )
670 {
671 /* Presumably unknown tag;
672 show tag value if we didn't
673 do it above */
674 if (!global_pppoe_show_tags_and_lengths)
675 {
676 proto_tree_add_item(pppoe_tree, hf_pppoed_tag, tvb, tagstart, 2, ENC_BIG_ENDIAN);
677 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_length, tvb, tagstart+2, 2, ENC_BIG_ENDIAN);
678 }
679 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_unknown_data, tvb,
680 tagstart+2, poe_tag_length, ENC_NA);
681 }
682 }
683
684 tagstart += (4 + poe_tag_length);
685 }
686 }
687 }
688
689
690 /* Discovery protocol, i.e. PPP session not yet established */
691 static void dissect_pppoed(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
692 {
693 guint8 pppoe_code;
694 guint16 reported_payload_length;
695
696 proto_tree *pppoe_tree = NULL;
697 proto_item *ti;
698
699 col_set_str(pinfo->cinfo, COL_PROTOCOL, "PPPoED");
700 col_clear(pinfo->cinfo, COL_INFO);
701
702 /* Start Decoding Here. */
703 pppoe_code = tvb_get_guint8(tvb, 1);
704
705 col_append_str(pinfo->cinfo, COL_INFO, val_to_str_const(pppoe_code, code_vals, "Unknown"));
706
707 /* Read length of payload */
708 reported_payload_length = tvb_get_ntohs(tvb, 4);
709
710 if (tree)
711 {
712 ti = proto_tree_add_item(tree, proto_pppoed, tvb, 0, reported_payload_length+6, ENC_NA);
713 pppoe_tree = proto_item_add_subtree(ti, ett_pppoed);
714
715 /* Dissect fixed fields */
716 proto_tree_add_item(pppoe_tree, hf_pppoe_version, tvb, 0, 1, ENC_BIG_ENDIAN);
717 proto_tree_add_item(pppoe_tree, hf_pppoe_type, tvb, 0, 1, ENC_BIG_ENDIAN);
718 proto_tree_add_item(pppoe_tree, hf_pppoe_code, tvb, 1, 1, ENC_BIG_ENDIAN);
719 proto_tree_add_item(pppoe_tree, hf_pppoe_session_id, tvb, 2, 2, ENC_BIG_ENDIAN);
720 proto_tree_add_item(pppoe_tree, hf_pppoe_payload_length, tvb, 4, 2, ENC_BIG_ENDIAN);
721 }
722
723 /* Now dissect any tags */
724 if (reported_payload_length > 0)
725 {
726 dissect_pppoe_tags(tvb, pinfo, 6, pppoe_tree, 6+reported_payload_length);
727 }
728
729 }
730
731 void proto_register_pppoed(void)
732 {
733 static hf_register_info hf[] =
734 {
735 /* Discovery tag fields */
736 { &hf_pppoed_tags,
737 { "PPPoE Tags", "pppoed.tags", FT_NONE, BASE_NONE,
738 NULL, 0x0, NULL, HFILL
739 }
740 },
741 { &hf_pppoed_tag,
742 { "Tag", "pppoed.tag", FT_UINT16, BASE_HEX,
743 VALS(tag_vals), 0x0, NULL, HFILL
744 }
745 },
746 { &hf_pppoed_tag_length,
747 { "Tag Length", "pppoed.tag_length", FT_UINT16, BASE_DEC,
748 NULL, 0x0, NULL, HFILL
749 }
750 },
751 { &hf_pppoed_tag_length_8,
752 { "Tag Length", "pppoed.tag_length_8", FT_UINT8, BASE_DEC,
753 NULL, 0x0, NULL, HFILL
754 }
755 },
756 { &hf_pppoed_tag_unknown_data,
757 { "Unknown Data", "pppoed.tag.unknown_data", FT_BYTES, BASE_NONE,
758 NULL, 0x0, NULL, HFILL
759 }
760 },
761 { &hf_pppoed_tag_service_name,
762 { "Service-Name", "pppoed.tags.service_name", FT_STRING, BASE_NONE,
763 NULL, 0x0, NULL, HFILL
764 }
765 },
766 { &hf_pppoed_tag_ac_name,
767 { "AC-Name", "pppoed.tags.ac_name", FT_STRING, BASE_NONE,
768 NULL, 0x0, NULL, HFILL
769 }
770 },
771 { &hf_pppoed_tag_host_uniq,
772 { "Host-Uniq", "pppoed.tags.host_uniq", FT_BYTES, BASE_NONE,
773 NULL, 0x0, NULL, HFILL
774 }
775 },
776 { &hf_pppoed_tag_ac_cookie,
777 { "AC-Cookie", "pppoed.tags.ac_cookie", FT_BYTES, BASE_NONE,
778 NULL, 0x0, NULL, HFILL
779 }
780 },
781 { &hf_pppoed_tag_vendor_id,
782 { "Vendor id", "pppoed.tags.vendor_id", FT_UINT32, BASE_DEC,
783 NULL, 0x0, NULL, HFILL
784 }
785 },
786 { &hf_pppoed_tag_vendor_unspecified,
787 { "Vendor unspecified", "pppoed.tags.vendor_unspecified", FT_BYTES, BASE_NONE,
788 NULL, 0x0, NULL, HFILL
789 }
790 },
791 { &hf_pppoed_tag_vspec_tags,
792 { "Vendor Specific PPPoE Tags", "pppoed.tags.vendorspecific.tags", FT_NONE, BASE_NONE,
793 NULL, 0x0, NULL, HFILL
794 }
795 },
796 { &hf_pppoed_tag_vspec_tag,
797 { "Tag", "pppoed.tags.vendorspecific.tag", FT_UINT8, BASE_HEX,
798 VALS(vspec_tag_vals), 0x0, NULL, HFILL
799 }
800 },
801 { &hf_pppoed_tag_vspec_circuit_id,
802 { "Circuit ID", "pppoed.tags.circuit_id", FT_STRING, BASE_NONE,
803 NULL, 0x0, NULL, HFILL
804 }
805 },
806 { &hf_pppoed_tag_vspec_remote_id,
807 { "Remote ID", "pppoed.tags.remote_id", FT_STRING, BASE_NONE,
808 NULL, 0x0, NULL, HFILL
809 }
810 },
811 { &hf_pppoed_tag_vspec_act_data_rate_up,
812 { "Actual Data Rate Upstream", "pppoed.tags.act_data_rate_up", FT_UINT32, BASE_DEC,
813 NULL, 0x0, NULL, HFILL
814 }
815 },
816 { &hf_pppoed_tag_vspec_act_data_rate_down,
817 { "Actual Data Rate Downstream", "pppoed.tags.act_data_rate_down", FT_UINT32, BASE_DEC,
818 NULL, 0x0, NULL, HFILL
819 }
820 },
821 { &hf_pppoed_tag_vspec_min_data_rate_up,
822 { "Minimum Data Rate Upstream", "pppoed.tags.min_data_rate_up", FT_UINT32, BASE_DEC,
823 NULL, 0x0, NULL, HFILL
824 }
825 },
826 { &hf_pppoed_tag_vspec_min_data_rate_down,
827 { "Minimum Data Rate Downstream", "pppoed.tags.min_data_rate_down", FT_UINT32, BASE_DEC,
828 NULL, 0x0, NULL, HFILL
829 }
830 },
831 { &hf_pppoed_tag_vspec_attainable_data_rate_up,
832 { "Attainable DataRate Upstream", "pppoed.tags.attainable_data_rate_up", FT_UINT32, BASE_DEC,
833 NULL, 0x0, NULL, HFILL
834 }
835 },
836 { &hf_pppoed_tag_vspec_attainable_data_rate_down,
837 { "Attainable DataRate Downstream", "pppoed.tags.attainable_data_rate_down", FT_UINT32, BASE_DEC,
838 NULL, 0x0, NULL, HFILL
839 }
840 },
841 { &hf_pppoed_tag_vspec_max_data_rate_up,
842 { "Maximum Data Rate Upstream", "pppoed.tags.max_data_rate_up", FT_UINT32, BASE_DEC,
843 NULL, 0x0, NULL, HFILL
844 }
845 },
846 { &hf_pppoed_tag_vspec_max_data_rate_down,
847 { "Maximum Data Rate Downstream", "pppoed.tags.max_data_rate_down", FT_UINT32, BASE_DEC,
848 NULL, 0x0, NULL, HFILL
849 }
850 },
851 { &hf_pppoed_tag_vspec_min_data_rate_up_lp,
852 { "Min DataRate Upstream in low power state", "pppoed.tags.min_data_rate_up_lp", FT_UINT32, BASE_DEC,
853 NULL, 0x0, NULL, HFILL
854 }
855 },
856 { &hf_pppoed_tag_vspec_min_data_rate_down_lp,
857 { "Minimum Data Rate Downstream in low power state", "pppoed.tags.min_data_rate_down_lp", FT_UINT32, BASE_DEC,
858 NULL, 0x0, NULL, HFILL
859 }
860 },
861 { &hf_pppoed_tag_vspec_max_int_delay_up,
862 { "Max Interleaving Delay Upstream", "pppoed.tags.max_int_delay_up", FT_UINT32, BASE_DEC,
863 NULL, 0x0, NULL, HFILL
864 }
865 },
866 { &hf_pppoed_tag_vspec_act_int_delay_up,
867 { "Actual Interleaving Delay Upstream", "pppoed.tags.act_int_delay_up", FT_UINT32, BASE_DEC,
868 NULL, 0x0, NULL, HFILL
869 }
870 },
871 { &hf_pppoed_tag_vspec_max_int_delay_down,
872 { "Maximum Interleaving Delay Downstream", "pppoed.tags.max_int_delay_down", FT_UINT32, BASE_DEC,
873 NULL, 0x0, NULL, HFILL
874 }
875 },
876 { &hf_pppoed_tag_vspec_act_int_delay_down,
877 { "Actual Interleaving Delay Downstream", "pppoed.tags.act_int_delay_down", FT_UINT32, BASE_DEC,
878 NULL, 0x0, NULL, HFILL
879 }
880 },
881 { &hf_pppoed_tag_vspec_access_loop_encapsulation,
882 { "Access-Loop-Encapsulation", "pppoed.tags.access_loop_encap", FT_NONE, BASE_NONE,
883 NULL, 0x0, NULL, HFILL
884 }
885 },
886 { &hf_pppoed_tag_vspec_access_loop_encap_data_link,
887 { "Data link", "pppoed.tags.access_loop_encap.data_link", FT_UINT8, BASE_HEX,
888 VALS(vspec_tag_dslf_access_loop_encap_data_link_vals), 0x0, NULL, HFILL
889 }
890 },
891 { &hf_pppoed_tag_vspec_access_loop_encap_encap_1,
892 { "Encaps 1", "pppoed.tags.access_loop_encap.encap_1", FT_UINT8, BASE_HEX,
893 VALS(vspec_tag_dslf_access_loop_encap_encap_1_vals), 0x0, NULL, HFILL
894 }
895 },
896 { &hf_pppoed_tag_vspec_access_loop_encap_encap_2,
897 { "Encaps 1", "pppoed.tags.access_loop_encap.encap_2", FT_UINT8, BASE_HEX,
898 VALS(vspec_tag_dslf_access_loop_encap_encap_2_vals), 0x0, NULL, HFILL
899 }
900 },
901 { &hf_pppoed_tag_credits,
902 { "Credits", "pppoed.tags.credits", FT_BYTES, BASE_NONE,
903 NULL, 0x0, NULL, HFILL
904 }
905 },
906 { &hf_pppoed_tag_credits_fcn,
907 { "FCN", "pppoed.tags.credits.fcn", FT_UINT16, BASE_DEC,
908 NULL, 0x0, NULL, HFILL
909 }
910 },
911 { &hf_pppoed_tag_credits_bcn,
912 { "BCN", "pppoed.tags.credits.bcn", FT_UINT16, BASE_DEC,
913 NULL, 0x0, NULL, HFILL
914 }
915 },
916 { &hf_pppoed_tag_metrics,
917 { "Metrics", "pppoed.tags.metrics", FT_BYTES, BASE_NONE,
918 NULL, 0x0, NULL, HFILL
919 }
920 },
921 { &hf_pppoed_tag_metrics_r,
922 { "Receive Only", "pppoed.tags.metrics.r", FT_BOOLEAN, 16,
923 NULL, PPPOE_RCV_ONLY_MASK, NULL, HFILL
924 }
925 },
926 { &hf_pppoed_tag_mdr_units,
927 { "MDR Units", "pppoed.tags.metrics.mdr_units", FT_UINT16, BASE_HEX,
928 VALS(datarate_scale_vals), PPPOE_MDR_MASK, NULL, HFILL
929 }
930 },
931 { &hf_pppoed_tag_cdr_units,
932 { "CDR Units", "pppoed.tags.metrics.cdr_units", FT_UINT16, BASE_HEX,
933 VALS(datarate_scale_vals), PPPOE_CDR_MASK, NULL, HFILL
934 }
935 },
936 { &hf_pppoed_tag_metrics_rlq,
937 { "Relative Link Quality", "pppoed.tags.metrics.rlq", FT_UINT8, BASE_DEC,
938 NULL, 0x0, NULL, HFILL
939 }
940 },
941 { &hf_pppoed_tag_metrics_resource,
942 { "Resource", "pppoed.tags.metrics.resource", FT_UINT8, BASE_DEC,
943 NULL, 0x0, NULL, HFILL
944 }
945 },
946 { &hf_pppoed_tag_metrics_latency,
947 { "Latency", "pppoed.tags.metrics.latency", FT_UINT16, BASE_DEC,
948 NULL, 0x0, NULL, HFILL
949 }
950 },
951 { &hf_pppoed_tag_metrics_curr_drate,
952 { "Curr. datarate", "pppoed.tags.metrics.curr_drate", FT_UINT16, BASE_DEC,
953 NULL, 0x0, NULL, HFILL
954 }
955 },
956 { &hf_pppoed_tag_metrics_max_drate,
957 { "Max. datarate", "pppoed.tags.metrics.max_drate", FT_UINT16, BASE_DEC,
958 NULL, 0x0, NULL, HFILL
959 }
960 },
961 { &hf_pppoed_tag_seq_num,
962 { "Sequence Number", "pppoed.tags.seq_num", FT_UINT16, BASE_HEX,
963 NULL, 0x0, NULL, HFILL
964 }
965 },
966 { &hf_pppoed_tag_cred_scale,
967 { "Credit Scale Factor", "pppoed.tags.credit_scale", FT_UINT16, BASE_DEC,
968 NULL, 0x0, NULL, HFILL
969 }
970 },
971 { &hf_pppoed_tag_relay_session_id,
972 { "Relay-Session-Id", "pppoed.tags.relay_session_id", FT_BYTES, BASE_NONE,
973 NULL, 0x0, NULL, HFILL
974 }
975 },
976 { &hf_pppoed_tag_hurl,
977 { "HURL", "pppoed.tags.hurl", FT_BYTES, BASE_NONE,
978 NULL, 0x0, NULL, HFILL
979 }
980 },
981 { &hf_pppoed_tag_motm,
982 { "MOTM", "pppoed.tags.motm", FT_BYTES, BASE_NONE,
983 NULL, 0x0, NULL, HFILL
984 }
985 },
986 { &hf_pppoed_tag_max_payload,
987 { "PPP-Max-Payload", "pppoed.tags.max_payload", FT_BYTES, BASE_NONE,
988 NULL, 0x0, NULL, HFILL
989 }
990 },
991 { &hf_pppoed_tag_ip_route_add,
992 { "IP Route Add", "pppoed.tags.ip_route_add", FT_BYTES, BASE_NONE,
993 NULL, 0x0, NULL, HFILL
994 }
995 },
996 { &hf_pppoed_tag_service_name_error,
997 { "Service-Name-Error", "pppoed.tags.service_name_error", FT_STRING, BASE_NONE,
998 NULL, 0x0, NULL, HFILL
999 }
1000 },
1001 { &hf_pppoed_tag_ac_system_error,
1002 { "AC-System-Error", "pppoed.tags.ac_system_error", FT_STRING, BASE_NONE,
1003 NULL, 0x0, NULL, HFILL
1004 }
1005 },
1006 { &hf_pppoed_tag_generic_error,
1007 { "Generic-Error", "pppoed.tags.generic_error", FT_STRING, BASE_NONE,
1008 NULL, 0x0, NULL, HFILL
1009 }
1010 }
1011 };
1012
1013 static gint *ett[] = {
1014 &ett_pppoed,
1015 &ett_pppoed_tags,
1016 &ett_pppoed_tag_vspec_dslf_access_loop_encaps
1017 };
1018
1019 module_t *pppoed_module;
1020
1021 /* Register protocol and fields */
1022 proto_pppoed = proto_register_protocol("PPP-over-Ethernet Discovery",
1023 "PPPoED", "pppoed");
1024 proto_register_subtree_array(ett, array_length(ett));
1025 proto_register_field_array(proto_pppoed, hf, array_length(hf));
1026
1027 /* Preference setting */
1028 pppoed_module = prefs_register_protocol(proto_pppoed, NULL);
1029 prefs_register_bool_preference(pppoed_module, "show_tags_and_lengths",
1030 "Show tag values and lengths",
1031 "Show values of tags and lengths of data fields",
1032 &global_pppoe_show_tags_and_lengths);
1033 }
1034
1035 void proto_reg_handoff_pppoed(void)
1036 {
1037 dissector_handle_t pppoed_handle;
1038
1039 pppoed_handle = create_dissector_handle(dissect_pppoed, proto_pppoed);
1040 dissector_add_uint("ethertype", ETHERTYPE_PPPOED, pppoed_handle);
1041 }
1042
1043
1044 /* Session protocol, i.e. PPP session established */
1045 static void dissect_pppoes(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1046 {
1047 guint8 pppoe_code;
1048 guint16 reported_payload_length;
1049 guint16 poe_tag_length;
1050 gint actual_payload_length;
1051 gint length, reported_length;
1052 gint credit_offset = 0, tagstart = 0;
1053 guint16 cp_code;
1054
1055 proto_tree *pppoe_tree;
1056 proto_item *ti = NULL;
1057 tvbuff_t *next_tvb;
1058
1059 col_set_str(pinfo->cinfo, COL_PROTOCOL, "PPPoES");
1060 col_clear(pinfo->cinfo, COL_INFO);
1061
1062 /* Start Decoding Here. */
1063 pppoe_code = tvb_get_guint8(tvb, 1);
1064
1065 col_set_str(pinfo->cinfo, COL_INFO,
1066 val_to_str_const(pppoe_code, code_vals, "Unknown"));
1067
1068 reported_payload_length = tvb_get_ntohs(tvb, 4);
1069 actual_payload_length = tvb_reported_length_remaining(tvb, 6);
1070
1071 if (tree)
1072 {
1073 ti = proto_tree_add_item(tree, proto_pppoes, tvb, 0, 6, ENC_NA);
1074 pppoe_tree = proto_item_add_subtree(ti, ett_pppoe);
1075
1076 proto_tree_add_item(pppoe_tree, hf_pppoe_version, tvb, 0, 1, ENC_BIG_ENDIAN);
1077 proto_tree_add_item(pppoe_tree, hf_pppoe_type, tvb, 0, 1, ENC_BIG_ENDIAN);
1078 proto_tree_add_item(pppoe_tree, hf_pppoe_code, tvb, 1, 1, ENC_BIG_ENDIAN);
1079 proto_tree_add_item(pppoe_tree, hf_pppoe_session_id, tvb, 2, 2, ENC_BIG_ENDIAN);
1080 ti = proto_tree_add_item(pppoe_tree, hf_pppoe_payload_length, tvb, 4, 2, ENC_BIG_ENDIAN);
1081
1082
1083 if (PPPOE_TAG_CREDITS == tvb_get_ntohs(tvb, 6))
1084 {
1085 tagstart = 6;
1086 poe_tag_length = tvb_get_ntohs(tvb, tagstart + 2);
1087
1088 /* Create tags subtree */
1089 ti = proto_tree_add_item(pppoe_tree, hf_pppoes_tags, tvb, tagstart, 8, ENC_NA);
1090 pppoe_tree = proto_item_add_subtree(ti, ett_pppoes_tags);
1091
1092 /* Show tag data */
1093 if (poe_tag_length == 4)
1094 {
1095 proto_tree_add_item(pppoe_tree, hf_pppoes_tag_credits_fcn, tvb,
1096 tagstart+4, 2, ENC_BIG_ENDIAN);
1097 proto_tree_add_item(pppoe_tree, hf_pppoes_tag_credits_bcn, tvb,
1098 tagstart+6, 2, ENC_BIG_ENDIAN);
1099 } else {
1100 proto_tree_add_item(pppoe_tree, hf_pppoed_tag_credits, tvb,
1101 tagstart+4, poe_tag_length, ENC_NA);
1102 }
1103
1104 credit_offset = 8;
1105 }
1106 }
1107
1108 /*
1109 * The only reason why the payload length from the header
1110 * should differ from the remaining data in the packet
1111 * would be if the total packet length, including Ethernet
1112 * CRC, were < 64 bytes, so that padding was required.
1113 *
1114 * That means that you have 14 bytes of Ethernet header,
1115 * 4 bytes of FCS, and fewer than 46 bytes of PPPoE packet.
1116 *
1117 * If that's not the case, we report a difference between
1118 * the payload length in the packet, and the amount of
1119 * data following the PPPoE header, as an error.
1120 */
1121 if (tvb_reported_length(tvb) > 46) {
1122 /*
1123 * Be forgiving about a possible trailing FCS.
1124 *
1125 * XXX - this dissector currently doesn't know
1126 * whether any extra data past the end of the PPP
1127 * payload is an FCS or not.
1128 *
1129 * If we know that we have an FCS, or that we don't
1130 * have an FCS, we should have been handed a tvbuff
1131 * without the FCS, and we should just do the strict
1132 * length check.
1133 *
1134 * If we don't know whether we have an FCS, then:
1135 *
1136 * if this isn't over Ethernet - the "E" in "PPPoE"
1137 * nonwithstanding, it can also run on top of 802.11,
1138 * for example - there's no trailer, so any data
1139 * past the payload length is either an FCS or
1140 * bogus;
1141 *
1142 * if this is over Ethernet, there shouldn't be
1143 * a trailer, as the packet is long enough not to
1144 * require a trailer, as per the above;
1145 *
1146 * so perhaps we should assume that if we have exactly
1147 * 4 bytes of extra information, it's an FCS, otherwise
1148 * it's not.
1149 *
1150 * Perhaps we need to have a routine to call to
1151 * do all the length checking, etc., and call it
1152 * from here and from other dissectors where the
1153 * protocol has a length field, or have a way to
1154 * tell the dissector that called us which field
1155 * has the length field and have *that* dissector
1156 * do the length checking and add the expert info
1157 * to the length field, *after* it does all the
1158 * FCS heuristics.
1159 */
1160
1161 /* retrieve the control protocol code if it's there */
1162 cp_code = tvb_get_ntohs(tvb, 6);
1163 /*
1164 * The session payload length expressly does not include pad bytes
1165 * when LCP or IPCP are present, so avoid the spurious error message
1166 */
1167 if ((cp_code != PPP_LCP) && (cp_code != PPP_IPCP) &&
1168 (reported_payload_length != actual_payload_length) &&
1169 ((reported_payload_length + 4) != actual_payload_length)) {
1170 proto_item_append_text(ti, " [incorrect, should be %u]",
1171 actual_payload_length);
1172 expert_add_info_format(pinfo, ti, &ei_pppoe_payload_length, "Possible bad payload length %u != %u", reported_payload_length, actual_payload_length);
1173 }
1174 }
1175
1176 /*
1177 * Construct a tvbuff containing the PPP packet.
1178 */
1179 length = tvb_length_remaining(tvb, 6);
1180 reported_length = tvb_reported_length_remaining(tvb, 6);
1181 DISSECTOR_ASSERT(length >= 0);
1182 DISSECTOR_ASSERT(reported_length >= 0);
1183 if (length > reported_length)
1184 length = reported_length;
1185 if ((guint)length > reported_payload_length)
1186 length = reported_payload_length;
1187 if ((guint)reported_length > reported_payload_length)
1188 reported_length = reported_payload_length;
1189 next_tvb = tvb_new_subset(tvb,(6 + credit_offset),
1190 (length - credit_offset),
1191 (reported_length - credit_offset));
1192 call_dissector(ppp_handle,next_tvb,pinfo,tree);
1193 }
1194
1195 void proto_register_pppoes(void)
1196 {
1197
1198 static hf_register_info hf[] =
1199 {
1200 { &hf_pppoes_tags,
1201 { "PPPoE Tags", "pppoes.tags", FT_NONE, BASE_NONE,
1202 NULL, 0x0, NULL, HFILL
1203 }
1204 },
1205 #if 0
1206 { &hf_pppoes_tag,
1207 { "Tag", "pppoes.tag", FT_UINT16, BASE_HEX,
1208 VALS(tag_vals), 0x0, NULL, HFILL
1209 }
1210 },
1211 #endif
1212 #if 0
1213 { &hf_pppoes_tag_credits,
1214 { "Credits", "pppoes.tags.credits", FT_BYTES, BASE_NONE,
1215 NULL, 0x0, NULL, HFILL
1216 }
1217 },
1218 #endif
1219 { &hf_pppoes_tag_credits_fcn,
1220 { "FCN", "pppoes.tags.credits.fcn", FT_UINT16, BASE_DEC,
1221 NULL, 0x0, NULL, HFILL
1222 }
1223 },
1224 { &hf_pppoes_tag_credits_bcn,
1225 { "BCN", "pppoes.tags.credits.bcn", FT_UINT16, BASE_DEC,
1226 NULL, 0x0, NULL, HFILL
1227 }
1228 }
1229 };
1230
1231 static gint *ett[] = {
1232 &ett_pppoes,
1233 &ett_pppoes_tags
1234 };
1235
1236 /* Register protocol */
1237 proto_pppoes = proto_register_protocol("PPP-over-Ethernet Session", "PPPoES", "pppoes");
1238
1239 proto_register_subtree_array(ett, array_length(ett));
1240 proto_register_field_array(proto_pppoes, hf, array_length(hf));
1241 }
1242
1243 void proto_register_pppoe(void)
1244 {
1245 static hf_register_info hf[] =
1246 {
1247 /* These fields common to discovery and session protocols */
1248 { &hf_pppoe_version,
1249 { "Version", "pppoe.version", FT_UINT8, BASE_DEC,
1250 NULL, 0xf0, NULL, HFILL
1251 }
1252 },
1253 { &hf_pppoe_type,
1254 { "Type", "pppoe.type", FT_UINT8, BASE_DEC,
1255 NULL, 0x0f, NULL, HFILL
1256 }
1257 },
1258 { &hf_pppoe_code,
1259 { "Code", "pppoe.code", FT_UINT8, BASE_HEX,
1260 VALS(code_vals), 0x0, NULL, HFILL
1261 }
1262 },
1263 { &hf_pppoe_session_id,
1264 { "Session ID", "pppoe.session_id", FT_UINT16, BASE_HEX,
1265 NULL, 0x0, NULL, HFILL
1266 }
1267 },
1268 { &hf_pppoe_payload_length,
1269 { "Payload Length", "pppoe.payload_length", FT_UINT16, BASE_DEC,
1270 NULL, 0x0, NULL, HFILL
1271 }
1272 }
1273 };
1274
1275 static gint *ett[] = {
1276 &ett_pppoe
1277 };
1278
1279 static ei_register_info ei[] = {
1280 { &ei_pppoe_tag_length, { "pppoed.tag_length.invalid", PI_MALFORMED, PI_WARN, "Wrong length", EXPFILL }},
1281 { &ei_pppoe_payload_length, { "pppoe.payload_length.bad", PI_MALFORMED, PI_WARN, "Possible bad payload length", EXPFILL }},
1282 };
1283
1284 expert_module_t* expert_pppoe;
1285
1286 /* Register protocol */
1287 proto_pppoe = proto_register_protocol("PPP-over-Ethernet", "PPPoE", "pppoe");
1288
1289 proto_register_subtree_array(ett, array_length(ett));
1290 proto_register_field_array(proto_pppoe, hf, array_length(hf));
1291 expert_pppoe = expert_register_protocol(proto_pppoe);
1292 expert_register_field_array(expert_pppoe, ei, array_length(ei));
1293
1294 }
1295
1296 void proto_reg_handoff_pppoes(void)
1297 {
1298 dissector_handle_t pppoes_handle =
1299 create_dissector_handle(dissect_pppoes, proto_pppoes);
1300 dissector_add_uint("ethertype", ETHERTYPE_PPPOES, pppoes_handle);
1301 dissector_add_uint("wtap_encap", WTAP_ENCAP_PPP_ETHER, pppoes_handle);
1302
1303 /* Get a handle for the PPP dissector */
1304 ppp_handle = find_dissector("ppp");
1305 }