2 * Routines for IAPP dissection
3 * Copyright 2002, Alfred Arnold <aarnold@elsa.de>
5 * $Id: packet-iapp.c,v 1.6 2002/08/28 21:00:16 jmayer Exp $
7 * Ethereal - Network traffic analyzer
8 * By Gerald Combs <gerald@ethereal.com>
9 * Copyright 1998 Gerald Combs
11 * is a dissector file; if you just copied this from README.developer,
12 * don't bother with the "Copied from" - you don't even need to put
13 * in a "Copied from" if you copied an existing dissector, especially
14 * if the bulk of the code in the new dissector is your code)
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License
18 * as published by the Free Software Foundation; either version 2
19 * of the License, or (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
42 #include <epan/packet.h>
45 /* Initialize the protocol and registered fields */
46 static int proto_iapp = -1;
47 static int hf_iapp_version = -1;
48 static int hf_iapp_type = -1;
50 /* Initialize the subtree pointers */
51 static gint ett_iapp = -1;
52 static gint ett_iapp_pdu = -1;
53 static gint ett_iapp_cap = -1;
54 static gint ett_iapp_auth = -1;
56 #define UDP_PORT_IAPP 2313
58 #define IAPP_ANNOUNCE_REQUEST 0
59 #define IAPP_ANNOUNCE_RESPONSE 1
60 #define IAPP_HANDOVER_REQUEST 2
61 #define IAPP_HANDOVER_RESPONSE 3
63 #define IAPP_PDU_SSID 0
64 #define IAPP_PDU_BSSID 1
65 #define IAPP_PDU_OLDBSSID 2
66 #define IAPP_PDU_MSADDR 3
67 #define IAPP_PDU_CAPABILITY 4
68 #define IAPP_PDU_ANNOUNCEINT 5
69 #define IAPP_PDU_HOTIMEOUT 6
70 #define IAPP_PDU_MESSAGEID 7
71 #define IAPP_PDU_PHYTYPE 0x10
72 #define IAPP_PDU_REGDOMAIN 0x11
73 #define IAPP_PDU_CHANNEL 0x12
74 #define IAPP_PDU_BEACONINT 0x13
75 #define IAPP_PDU_OUIIDENT 0x80
76 #define IAPP_PDU_AUTHINFO 0x81
78 #define IAPP_CAP_FORWARDING 0x40
79 #define IAPP_CAP_WEP 0x20
81 #define IAPP_PHY_PROP 0x00
82 #define IAPP_PHY_FHSS 0x01
83 #define IAPP_PHY_DSSS 0x02
84 #define IAPP_PHY_IR 0x03
85 #define IAPP_PHY_OFDM 0x04
87 #define IAPP_DOM_FCC 0x10
88 #define IAPP_DOM_IC 0x20
89 #define IAPP_DOM_ETSI 0x30
90 #define IAPP_DOM_SPAIN 0x31
91 #define IAPP_DOM_FRANCE 0x32
92 #define IAPP_DOM_MKK 0x40
94 #define IAPP_AUTH_STATUS 0x01
95 #define IAPP_AUTH_USERNAME 0x02
96 #define IAPP_AUTH_PROVNAME 0x03
97 #define IAPP_AUTH_RXPKTS 0x04
98 #define IAPP_AUTH_TXPKTS 0x05
99 #define IAPP_AUTH_RXBYTES 0x06
100 #define IAPP_AUTH_TXBYTES 0x07
101 #define IAPP_AUTH_LOGINTIME 0x08
102 #define IAPP_AUTH_TIMELIMIT 0x09
103 #define IAPP_AUTH_VOLLIMIT 0x0a
104 #define IAPP_AUTH_ACCCYCLE 0x0b
105 #define IAPP_AUTH_RXGWORDS 0x0c
106 #define IAPP_AUTH_TXGWORDS 0x0d
107 #define IAPP_AUTH_IPADDR 0x0e
108 #define IAPP_AUTH_TRAILER 0xff
111 typedef struct _e_iapphdr {
116 typedef struct _e_pduhdr {
122 static value_string iapp_vals[] = {
123 {IAPP_ANNOUNCE_REQUEST, "Announce Request"},
124 {IAPP_ANNOUNCE_RESPONSE, "Announce Response"},
125 {IAPP_HANDOVER_REQUEST, "Handover Request"},
126 {IAPP_HANDOVER_RESPONSE, "Handover Response"},
129 static value_string iapp_pdu_type_vals[] = {
130 {IAPP_PDU_SSID, "Network Name"},
131 {IAPP_PDU_BSSID, "BSSID"},
132 {IAPP_PDU_OLDBSSID, "Old BSSID"},
133 {IAPP_PDU_MSADDR, "Mobile Station Address"},
134 {IAPP_PDU_CAPABILITY, "Capabilities"},
135 {IAPP_PDU_ANNOUNCEINT, "Announce Interval"},
136 {IAPP_PDU_HOTIMEOUT, "Handover Timeout"},
137 {IAPP_PDU_MESSAGEID, "Message ID"},
138 {IAPP_PDU_PHYTYPE, "PHY Type"},
139 {IAPP_PDU_REGDOMAIN, "Regulatory Domain"},
140 {IAPP_PDU_CHANNEL, "Radio Channel"},
141 {IAPP_PDU_BEACONINT, "Beacon Interval"},
142 {IAPP_PDU_OUIIDENT, "OUI Identifier"},
143 {IAPP_PDU_AUTHINFO, "ELSA Authentication Info"},
146 static value_string iapp_cap_vals[] = {
147 {IAPP_CAP_FORWARDING, "Forwarding"},
148 {IAPP_CAP_WEP, "WEP"},
151 static value_string iapp_phy_vals[] = {
152 {IAPP_PHY_PROP, "Proprietary"},
153 {IAPP_PHY_FHSS, "FHSS"},
154 {IAPP_PHY_DSSS, "DSSS"},
155 {IAPP_PHY_IR, "Infrared"},
156 {IAPP_PHY_OFDM, "OFDM"},
159 static value_string iapp_dom_vals[] = {
160 {IAPP_DOM_FCC, "FCC (USA)"},
161 {IAPP_DOM_IC, "IC (Canada)"},
162 {IAPP_DOM_ETSI, "ETSI (Europe)"},
163 {IAPP_DOM_SPAIN, "Spain"},
164 {IAPP_DOM_FRANCE, "France"},
165 {IAPP_DOM_MKK, "MKK (Japan)"},
168 static value_string iapp_auth_type_vals[] = {
169 {IAPP_AUTH_STATUS, "Status"},
170 {IAPP_AUTH_USERNAME, "User Name"},
171 {IAPP_AUTH_PROVNAME, "Provider Name"},
172 {IAPP_AUTH_RXPKTS, "Received Packets"},
173 {IAPP_AUTH_TXPKTS, "Transmitted Packets"},
174 {IAPP_AUTH_RXBYTES, "Received Octets"},
175 {IAPP_AUTH_TXBYTES, "Transmitted Octets"},
176 {IAPP_AUTH_LOGINTIME, "Session Time"},
177 {IAPP_AUTH_TIMELIMIT, "Time Limit"},
178 {IAPP_AUTH_VOLLIMIT, "Volume Limit"},
179 {IAPP_AUTH_ACCCYCLE, "Accounting Cycle"},
180 {IAPP_AUTH_TRAILER, "Authenticator"},
181 {IAPP_AUTH_RXGWORDS, "Received Gigawords"},
182 {IAPP_AUTH_TXGWORDS, "Transmitted Gigawords"},
183 {IAPP_AUTH_IPADDR, "Client IP Address"},
187 static gchar textbuffer[2000];
190 iaconvertbufftostr(gchar *dest, tvbuff_t *tvb, int offset, int length)
192 /*converts the raw buffer into printable text */
195 const guint8 *pd = tvb_get_ptr(tvb, offset, length);
200 for (i=0; i < (guint32)length; i++)
202 if( isalnum((int)pd[i])||ispunct((int)pd[i])
203 ||((int)pd[i]==' ')) {
204 dest[totlen]=(gchar)pd[i];
209 sprintf(&(dest[totlen]), "\\%03o", pd[i]);
210 totlen=totlen+strlen(&(dest[totlen]));
218 /* dissect a capability bit field */
220 static void dissect_caps(proto_item *pitem, tvbuff_t *tvb, int offset)
223 int bit, val, z, thisbit;
224 gchar *strval, bitval[20];
226 captree = proto_item_add_subtree(pitem, ett_iapp_cap);
227 val = tvb_get_guint8(tvb, offset + 3);
230 for (bit = 7; bit >= 0; bit--)
232 strval = match_strval(1 << bit, iapp_cap_vals);
235 thisbit = (val & (1 << bit)) ? 1 : 0;
236 for (z = 0; z < 7; z++)
238 bitval[z] = thisbit + '0';
241 proto_tree_add_text(captree, tvb, offset + 3, 1, "%s %s: %s",
242 bitval, strval, thisbit ? "Yes" : "No");
248 authval_to_str(int type, int len, tvbuff_t *tvb, int offset)
254 run += sprintf(run, "Value: ");
258 case IAPP_AUTH_STATUS:
259 strcpy(textbuffer, tvb_get_guint8(tvb, offset + 3) ? "Authenticated" : "Not authenticated");
261 case IAPP_AUTH_USERNAME:
262 case IAPP_AUTH_PROVNAME:
263 iaconvertbufftostr(run, tvb, offset + 3, len);
265 case IAPP_AUTH_RXPKTS:
266 case IAPP_AUTH_TXPKTS:
267 case IAPP_AUTH_RXBYTES:
268 case IAPP_AUTH_TXBYTES:
269 case IAPP_AUTH_RXGWORDS:
270 case IAPP_AUTH_TXGWORDS:
271 case IAPP_AUTH_VOLLIMIT:
272 val = tvb_get_ntohl(tvb, offset + 3);
273 run += sprintf(run, "%d", val);
275 case IAPP_AUTH_LOGINTIME:
276 case IAPP_AUTH_TIMELIMIT:
277 case IAPP_AUTH_ACCCYCLE:
278 val = tvb_get_ntohl(tvb, offset + 3);
279 run += sprintf(run, "%d seconds", val);
281 case IAPP_AUTH_IPADDR:
282 run += sprintf(run, "%d.%d.%d.%d",
283 tvb_get_guint8(tvb, offset + 3),
284 tvb_get_guint8(tvb, offset + 4),
285 tvb_get_guint8(tvb, offset + 5),
286 tvb_get_guint8(tvb, offset + 6));
288 case IAPP_AUTH_TRAILER:
289 for (z = 0; z < len; z++)
290 run += sprintf(run, " %02x", tvb_get_guint8(tvb, offset + 3 + z));
297 /* dissect authentication info */
299 static void dissect_authinfo(proto_item *pitem, tvbuff_t *tvb, int offset, int sumlen)
301 proto_tree *authtree;
303 gchar *authstrval, *valstr;
306 authtree = proto_item_add_subtree(pitem, ett_iapp_auth);
310 tvb_memcpy(tvb, (guint8 *)&pduhdr, offset, sizeof(e_pduhdr));
311 len = (((int)pduhdr.pdu_len_h) << 8) + pduhdr.pdu_len_l;
313 authstrval = val_to_str(pduhdr.pdu_type, iapp_auth_type_vals,
315 valstr = authval_to_str(pduhdr.pdu_type, len, tvb, offset);
316 proto_tree_add_text(authtree, tvb, offset, len + 3, "%s(%d) %s",
317 authstrval, pduhdr.pdu_type, valstr);
324 /* get displayable values of PDU contents */
326 static int is_fhss = 0;
329 pduval_to_str(int type, int len, tvbuff_t *tvb, int offset)
337 run += sprintf(run, "Value: ");
342 iaconvertbufftostr(run, tvb, offset + 3, len);
345 case IAPP_PDU_OLDBSSID:
346 case IAPP_PDU_MSADDR:
347 mac = tvb_get_ptr(tvb, offset + 3, len);
348 for (z = 0; z < len; z++)
349 run += sprintf(run, "%s%02x", z ? ":" : "", mac[z]);
351 case IAPP_PDU_CAPABILITY:
355 val = tvb_get_guint8(tvb, offset + 3);
356 run += sprintf(run, "%02x (", val);
357 for (mask = 0x80; mask; mask >>= 1)
360 strval = match_strval(mask, iapp_cap_vals);
364 run += sprintf(run, " ");
365 run += sprintf(run, strval);
368 run += sprintf(run, ")");
371 case IAPP_PDU_ANNOUNCEINT:
372 val = tvb_get_ntohs(tvb, offset + 3);
373 run += sprintf(run, "%d seconds", val);
375 case IAPP_PDU_HOTIMEOUT:
376 case IAPP_PDU_BEACONINT:
377 val = tvb_get_ntohs(tvb, offset + 3);
378 run += sprintf(run, "%d Kus", val);
380 case IAPP_PDU_MESSAGEID:
381 val = tvb_get_ntohs(tvb, offset + 3);
382 run += sprintf(run, "%d", val);
384 case IAPP_PDU_PHYTYPE:
385 val = tvb_get_guint8(tvb, offset + 3);
386 strval = val_to_str(val, iapp_phy_vals, "Unknown");
387 run += sprintf(run, strval);
388 is_fhss = (val == IAPP_PHY_FHSS);
390 case IAPP_PDU_REGDOMAIN:
391 val = tvb_get_guint8(tvb, offset + 3);
392 strval = val_to_str(val, iapp_dom_vals, "Unknown");
393 run += sprintf(run, strval);
395 case IAPP_PDU_CHANNEL:
396 val = tvb_get_guint8(tvb, offset + 3);
398 run += sprintf(run, "Pattern set %d, sequence %d",
399 ((val >> 6) & 3) + 1, (val & 31) + 1);
401 run += sprintf(run, "%d", val);
403 case IAPP_PDU_OUIIDENT:
404 for (val = z = 0; z < 3; z++)
405 val = (val << 8) | tvb_get_guint8(tvb, offset + 3 + z);
406 strval = val_to_str(val, oui_vals, "Unknown");
407 run += sprintf(run, strval);
414 /* code to dissect a list of PDUs */
417 dissect_pdus(tvbuff_t *tvb, int offset, proto_tree *pdutree, int pdulen)
421 gchar *pdustrval, *valstr;
426 proto_tree_add_text(pdutree, tvb, offset, 0, "No PDUs found");
432 tvb_memcpy(tvb, (guint8 *)&pduhdr, offset, sizeof(e_pduhdr));
433 len = (((int)pduhdr.pdu_len_h) << 8) + pduhdr.pdu_len_l;
435 pdustrval = val_to_str(pduhdr.pdu_type, iapp_pdu_type_vals,
437 valstr = pduval_to_str(pduhdr.pdu_type, len, tvb, offset);
438 ti = proto_tree_add_text(pdutree, tvb, offset, len + 3, "%s(%d) %s",
439 pdustrval, pduhdr.pdu_type, valstr);
441 if (pduhdr.pdu_type == IAPP_PDU_CAPABILITY)
442 dissect_caps(ti, tvb, offset);
444 if (pduhdr.pdu_type == IAPP_PDU_AUTHINFO)
445 dissect_authinfo(ti, tvb, offset + 3, len);
452 /* code to dissect an IAPP packet */
454 dissect_iapp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
456 proto_item *ti, *pdutf;
457 proto_tree *iapp_tree, *pdutree;
463 if (check_col(pinfo->cinfo, COL_PROTOCOL))
464 col_set_str(pinfo->cinfo, COL_PROTOCOL, "IAPP");
466 if (check_col(pinfo->cinfo, COL_INFO))
467 col_clear(pinfo->cinfo, COL_INFO);
469 tvb_memcpy(tvb, (guint8 *)&ih, 0, sizeof(e_iapphdr));
471 ia_version = (int)ih.ia_version;
472 ia_type = (int)ih.ia_type;
473 codestrval = val_to_str(ia_type, iapp_vals, "Unknown Packet");
474 if (check_col(pinfo->cinfo, COL_INFO))
476 col_add_fstr(pinfo->cinfo, COL_INFO, "%s(%d) (version=%d)",
477 codestrval, ia_type, ia_version);
482 ti = proto_tree_add_item(tree, proto_iapp, tvb, 0, -1, FALSE);
483 iapp_tree = proto_item_add_subtree(ti, ett_iapp);
485 /* common header for all IAPP frames */
487 proto_tree_add_uint(iapp_tree, hf_iapp_version, tvb, 0, 1,
489 proto_tree_add_uint_format(iapp_tree, hf_iapp_type, tvb, 1, 1,
490 ih.ia_type, "Type: %s(%d)", codestrval, ia_type);
492 pdutf = proto_tree_add_text(iapp_tree, tvb, 2, -1,
493 "Protocol data units");
494 pdutree = proto_item_add_subtree(pdutf, ett_iapp_pdu);
498 dissect_pdus(tvb, 2, pdutree,
499 tvb_length_remaining(tvb, 2));
505 /* Register the protocol with Ethereal */
507 /* this format is require because a script is used to build the C function
508 that calls all the protocol registration.
512 proto_register_iapp(void)
515 /* Setup list of header fields See Section 1.6.1 for details*/
516 static hf_register_info hf[] = {
518 { "Version", "iapp.version", FT_UINT8, BASE_DEC, NULL, 0x00, "", HFILL }
521 { "type", "iapp.type", FT_UINT8, BASE_DEC, NULL, 0x00, "", HFILL }
525 /* Setup protocol subtree array */
526 static gint *ett[] = {
533 /* Register the protocol name and description */
534 proto_iapp = proto_register_protocol("Inter-Access-Point Protocol",
537 /* Required function calls to register the header fields and subtrees used */
538 proto_register_field_array(proto_iapp, hf, array_length(hf));
539 proto_register_subtree_array(ett, array_length(ett));
543 /* If this dissector uses sub-dissector registration add a registration routine.
544 This format is required because a script is used to find these routines and
545 create the code that calls these routines.
548 proto_reg_handoff_iapp(void)
550 dissector_handle_t iapp_handle;
552 iapp_handle = create_dissector_handle(dissect_iapp, proto_iapp);
553 dissector_add("udp.port", UDP_PORT_IAPP, iapp_handle);