Disconnect hostapd from building in base
[dragonfly.git] / contrib / hostapd / src / rsn_supp / wpa_ie.c
CommitLineData
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1/*
2 * wpa_supplicant - WPA/RSN IE and KDE processing
3 * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
4 *
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5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
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7 */
8
9#include "includes.h"
10
11#include "common.h"
12#include "wpa.h"
13#include "pmksa_cache.h"
4781064b 14#include "common/ieee802_11_defs.h"
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15#include "wpa_i.h"
16#include "wpa_ie.h"
17
18
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19/**
20 * wpa_parse_wpa_ie - Parse WPA/RSN IE
21 * @wpa_ie: Pointer to WPA or RSN IE
22 * @wpa_ie_len: Length of the WPA/RSN IE
23 * @data: Pointer to data area for parsing results
24 * Returns: 0 on success, -1 on failure
25 *
26 * Parse the contents of WPA or RSN IE and write the parsed data into data.
27 */
28int wpa_parse_wpa_ie(const u8 *wpa_ie, size_t wpa_ie_len,
29 struct wpa_ie_data *data)
30{
31 if (wpa_ie_len >= 1 && wpa_ie[0] == WLAN_EID_RSN)
32 return wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, data);
33 else
34 return wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, data);
35}
36
37
38static int wpa_gen_wpa_ie_wpa(u8 *wpa_ie, size_t wpa_ie_len,
39 int pairwise_cipher, int group_cipher,
40 int key_mgmt)
41{
42 u8 *pos;
43 struct wpa_ie_hdr *hdr;
4781064b 44 u32 suite;
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45
46 if (wpa_ie_len < sizeof(*hdr) + WPA_SELECTOR_LEN +
47 2 + WPA_SELECTOR_LEN + 2 + WPA_SELECTOR_LEN)
48 return -1;
49
50 hdr = (struct wpa_ie_hdr *) wpa_ie;
51 hdr->elem_id = WLAN_EID_VENDOR_SPECIFIC;
52 RSN_SELECTOR_PUT(hdr->oui, WPA_OUI_TYPE);
53 WPA_PUT_LE16(hdr->version, WPA_VERSION);
54 pos = (u8 *) (hdr + 1);
55
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56 suite = wpa_cipher_to_suite(WPA_PROTO_WPA, group_cipher);
57 if (suite == 0) {
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58 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
59 group_cipher);
60 return -1;
61 }
4781064b 62 RSN_SELECTOR_PUT(pos, suite);
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63 pos += WPA_SELECTOR_LEN;
64
65 *pos++ = 1;
66 *pos++ = 0;
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67 suite = wpa_cipher_to_suite(WPA_PROTO_WPA, pairwise_cipher);
68 if (suite == 0 ||
69 (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
70 pairwise_cipher != WPA_CIPHER_NONE)) {
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71 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
72 pairwise_cipher);
73 return -1;
74 }
4781064b 75 RSN_SELECTOR_PUT(pos, suite);
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76 pos += WPA_SELECTOR_LEN;
77
78 *pos++ = 1;
79 *pos++ = 0;
80 if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
81 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
82 } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
83 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
84 } else if (key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
85 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_NONE);
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86 } else if (key_mgmt == WPA_KEY_MGMT_CCKM) {
87 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_CCKM);
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88 } else {
89 wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
90 key_mgmt);
91 return -1;
92 }
93 pos += WPA_SELECTOR_LEN;
94
95 /* WPA Capabilities; use defaults, so no need to include it */
96
97 hdr->len = (pos - wpa_ie) - 2;
98
99 WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len);
100
101 return pos - wpa_ie;
102}
103
104
105static int wpa_gen_wpa_ie_rsn(u8 *rsn_ie, size_t rsn_ie_len,
106 int pairwise_cipher, int group_cipher,
107 int key_mgmt, int mgmt_group_cipher,
108 struct wpa_sm *sm)
109{
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110 u8 *pos;
111 struct rsn_ie_hdr *hdr;
112 u16 capab;
4781064b 113 u32 suite;
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114
115 if (rsn_ie_len < sizeof(*hdr) + RSN_SELECTOR_LEN +
116 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN + 2 +
117 (sm->cur_pmksa ? 2 + PMKID_LEN : 0)) {
118 wpa_printf(MSG_DEBUG, "RSN: Too short IE buffer (%lu bytes)",
119 (unsigned long) rsn_ie_len);
120 return -1;
121 }
122
123 hdr = (struct rsn_ie_hdr *) rsn_ie;
124 hdr->elem_id = WLAN_EID_RSN;
125 WPA_PUT_LE16(hdr->version, RSN_VERSION);
126 pos = (u8 *) (hdr + 1);
127
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128 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher);
129 if (suite == 0) {
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130 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
131 group_cipher);
132 return -1;
133 }
4781064b 134 RSN_SELECTOR_PUT(pos, suite);
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135 pos += RSN_SELECTOR_LEN;
136
137 *pos++ = 1;
138 *pos++ = 0;
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139 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher);
140 if (suite == 0 ||
141 (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
142 pairwise_cipher != WPA_CIPHER_NONE)) {
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143 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
144 pairwise_cipher);
145 return -1;
146 }
4781064b 147 RSN_SELECTOR_PUT(pos, suite);
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148 pos += RSN_SELECTOR_LEN;
149
150 *pos++ = 1;
151 *pos++ = 0;
152 if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
153 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X);
154 } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
155 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X);
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156 } else if (key_mgmt == WPA_KEY_MGMT_CCKM) {
157 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_CCKM);
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158#ifdef CONFIG_IEEE80211R
159 } else if (key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) {
160 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
161 } else if (key_mgmt == WPA_KEY_MGMT_FT_PSK) {
162 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
163#endif /* CONFIG_IEEE80211R */
164#ifdef CONFIG_IEEE80211W
165 } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SHA256) {
166 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SHA256);
167 } else if (key_mgmt == WPA_KEY_MGMT_PSK_SHA256) {
168 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_SHA256);
169#endif /* CONFIG_IEEE80211W */
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170#ifdef CONFIG_SAE
171 } else if (key_mgmt == WPA_KEY_MGMT_SAE) {
172 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE);
173 } else if (key_mgmt == WPA_KEY_MGMT_FT_SAE) {
174 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_SAE);
175#endif /* CONFIG_SAE */
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176 } else {
177 wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
178 key_mgmt);
179 return -1;
180 }
181 pos += RSN_SELECTOR_LEN;
182
183 /* RSN Capabilities */
184 capab = 0;
185#ifdef CONFIG_IEEE80211W
4781064b 186 if (sm->mfp)
a875087d 187 capab |= WPA_CAPABILITY_MFPC;
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188 if (sm->mfp == 2)
189 capab |= WPA_CAPABILITY_MFPR;
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190#endif /* CONFIG_IEEE80211W */
191 WPA_PUT_LE16(pos, capab);
192 pos += 2;
193
194 if (sm->cur_pmksa) {
195 /* PMKID Count (2 octets, little endian) */
196 *pos++ = 1;
197 *pos++ = 0;
198 /* PMKID */
199 os_memcpy(pos, sm->cur_pmksa->pmkid, PMKID_LEN);
200 pos += PMKID_LEN;
201 }
202
203#ifdef CONFIG_IEEE80211W
204 if (mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) {
205 if (!sm->cur_pmksa) {
206 /* PMKID Count */
207 WPA_PUT_LE16(pos, 0);
208 pos += 2;
209 }
210
211 /* Management Group Cipher Suite */
212 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
213 pos += RSN_SELECTOR_LEN;
214 }
215#endif /* CONFIG_IEEE80211W */
216
217 hdr->len = (pos - rsn_ie) - 2;
218
219 WPA_ASSERT((size_t) (pos - rsn_ie) <= rsn_ie_len);
220
221 return pos - rsn_ie;
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222}
223
224
225/**
226 * wpa_gen_wpa_ie - Generate WPA/RSN IE based on current security policy
227 * @sm: Pointer to WPA state machine data from wpa_sm_init()
228 * @wpa_ie: Pointer to memory area for the generated WPA/RSN IE
229 * @wpa_ie_len: Maximum length of the generated WPA/RSN IE
230 * Returns: Length of the generated WPA/RSN IE or -1 on failure
231 */
232int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len)
233{
234 if (sm->proto == WPA_PROTO_RSN)
235 return wpa_gen_wpa_ie_rsn(wpa_ie, wpa_ie_len,
236 sm->pairwise_cipher,
237 sm->group_cipher,
238 sm->key_mgmt, sm->mgmt_group_cipher,
239 sm);
240 else
241 return wpa_gen_wpa_ie_wpa(wpa_ie, wpa_ie_len,
242 sm->pairwise_cipher,
243 sm->group_cipher,
244 sm->key_mgmt);
245}
246
247
248/**
249 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs
250 * @pos: Pointer to the IE header
251 * @end: Pointer to the end of the Key Data buffer
252 * @ie: Pointer to parsed IE data
253 * Returns: 0 on success, 1 if end mark is found, -1 on failure
254 */
255static int wpa_parse_generic(const u8 *pos, const u8 *end,
256 struct wpa_eapol_ie_parse *ie)
257{
258 if (pos[1] == 0)
259 return 1;
260
261 if (pos[1] >= 6 &&
262 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE &&
263 pos[2 + WPA_SELECTOR_LEN] == 1 &&
264 pos[2 + WPA_SELECTOR_LEN + 1] == 0) {
265 ie->wpa_ie = pos;
266 ie->wpa_ie_len = pos[1] + 2;
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267 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key",
268 ie->wpa_ie, ie->wpa_ie_len);
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269 return 0;
270 }
271
272 if (pos + 1 + RSN_SELECTOR_LEN < end &&
273 pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN &&
274 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) {
275 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN;
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276 wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key",
277 pos, pos[1] + 2);
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278 return 0;
279 }
280
281 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
282 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) {
283 ie->gtk = pos + 2 + RSN_SELECTOR_LEN;
284 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN;
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285 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key",
286 pos, pos[1] + 2);
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287 return 0;
288 }
289
290 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
291 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) {
292 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN;
293 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN;
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294 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key",
295 pos, pos[1] + 2);
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296 return 0;
297 }
298
299#ifdef CONFIG_PEERKEY
300 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
301 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_SMK) {
302 ie->smk = pos + 2 + RSN_SELECTOR_LEN;
303 ie->smk_len = pos[1] - RSN_SELECTOR_LEN;
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304 wpa_hexdump_key(MSG_DEBUG, "WPA: SMK in EAPOL-Key",
305 pos, pos[1] + 2);
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306 return 0;
307 }
308
309 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
310 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_NONCE) {
311 ie->nonce = pos + 2 + RSN_SELECTOR_LEN;
312 ie->nonce_len = pos[1] - RSN_SELECTOR_LEN;
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313 wpa_hexdump(MSG_DEBUG, "WPA: Nonce in EAPOL-Key",
314 pos, pos[1] + 2);
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315 return 0;
316 }
317
318 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
319 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_LIFETIME) {
320 ie->lifetime = pos + 2 + RSN_SELECTOR_LEN;
321 ie->lifetime_len = pos[1] - RSN_SELECTOR_LEN;
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322 wpa_hexdump(MSG_DEBUG, "WPA: Lifetime in EAPOL-Key",
323 pos, pos[1] + 2);
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324 return 0;
325 }
326
327 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
328 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_ERROR) {
329 ie->error = pos + 2 + RSN_SELECTOR_LEN;
330 ie->error_len = pos[1] - RSN_SELECTOR_LEN;
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331 wpa_hexdump(MSG_DEBUG, "WPA: Error in EAPOL-Key",
332 pos, pos[1] + 2);
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333 return 0;
334 }
335#endif /* CONFIG_PEERKEY */
336
337#ifdef CONFIG_IEEE80211W
338 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
339 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) {
340 ie->igtk = pos + 2 + RSN_SELECTOR_LEN;
341 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN;
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342 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key",
343 pos, pos[1] + 2);
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344 return 0;
345 }
346#endif /* CONFIG_IEEE80211W */
347
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348#ifdef CONFIG_P2P
349 if (pos[1] >= RSN_SELECTOR_LEN + 1 &&
350 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) {
351 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN;
352 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key",
353 ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN);
354 return 0;
355 }
356
357 if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 &&
358 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) {
359 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN;
360 wpa_hexdump(MSG_DEBUG,
361 "WPA: IP Address Allocation in EAPOL-Key",
362 ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN);
363 return 0;
364 }
365#endif /* CONFIG_P2P */
366
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367 return 0;
368}
369
370
371/**
372 * wpa_supplicant_parse_ies - Parse EAPOL-Key Key Data IEs
373 * @buf: Pointer to the Key Data buffer
374 * @len: Key Data Length
375 * @ie: Pointer to parsed IE data
376 * Returns: 0 on success, -1 on failure
377 */
378int wpa_supplicant_parse_ies(const u8 *buf, size_t len,
379 struct wpa_eapol_ie_parse *ie)
380{
381 const u8 *pos, *end;
382 int ret = 0;
383
384 os_memset(ie, 0, sizeof(*ie));
385 for (pos = buf, end = pos + len; pos + 1 < end; pos += 2 + pos[1]) {
386 if (pos[0] == 0xdd &&
387 ((pos == buf + len - 1) || pos[1] == 0)) {
388 /* Ignore padding */
389 break;
390 }
391 if (pos + 2 + pos[1] > end) {
392 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data "
393 "underflow (ie=%d len=%d pos=%d)",
394 pos[0], pos[1], (int) (pos - buf));
395 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data",
396 buf, len);
397 ret = -1;
398 break;
399 }
400 if (*pos == WLAN_EID_RSN) {
401 ie->rsn_ie = pos;
402 ie->rsn_ie_len = pos[1] + 2;
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403 wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key",
404 ie->rsn_ie, ie->rsn_ie_len);
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405 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) {
406 ie->mdie = pos;
407 ie->mdie_len = pos[1] + 2;
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408 wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key",
409 ie->mdie, ie->mdie_len);
410 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) {
411 ie->ftie = pos;
412 ie->ftie_len = pos[1] + 2;
413 wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key",
414 ie->ftie, ie->ftie_len);
415 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) {
416 if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) {
417 ie->reassoc_deadline = pos;
418 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline "
419 "in EAPOL-Key",
420 ie->reassoc_deadline, pos[1] + 2);
421 } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) {
422 ie->key_lifetime = pos;
423 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime "
424 "in EAPOL-Key",
425 ie->key_lifetime, pos[1] + 2);
426 } else {
427 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized "
428 "EAPOL-Key Key Data IE",
429 pos, 2 + pos[1]);
430 }
431 } else if (*pos == WLAN_EID_LINK_ID) {
432 if (pos[1] >= 18) {
433 ie->lnkid = pos;
434 ie->lnkid_len = pos[1] + 2;
435 }
436 } else if (*pos == WLAN_EID_EXT_CAPAB) {
437 ie->ext_capab = pos;
438 ie->ext_capab_len = pos[1] + 2;
439 } else if (*pos == WLAN_EID_SUPP_RATES) {
440 ie->supp_rates = pos;
441 ie->supp_rates_len = pos[1] + 2;
442 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) {
443 ie->ext_supp_rates = pos;
444 ie->ext_supp_rates_len = pos[1] + 2;
445 } else if (*pos == WLAN_EID_HT_CAP) {
446 ie->ht_capabilities = pos + 2;
447 ie->ht_capabilities_len = pos[1];
448 } else if (*pos == WLAN_EID_VHT_AID) {
449 if (pos[1] >= 2)
450 ie->aid = WPA_GET_LE16(pos + 2);
451 } else if (*pos == WLAN_EID_VHT_CAP) {
452 ie->vht_capabilities = pos + 2;
453 ie->vht_capabilities_len = pos[1];
454 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) {
455 ie->qosinfo = pos[2];
456 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) {
457 ie->supp_channels = pos + 2;
458 ie->supp_channels_len = pos[1];
459 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) {
460 ie->supp_oper_classes = pos + 2;
461 ie->supp_oper_classes_len = pos[1];
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462 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) {
463 ret = wpa_parse_generic(pos, end, ie);
464 if (ret < 0)
465 break;
466 if (ret > 0) {
467 ret = 0;
468 break;
469 }
470 } else {
471 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key "
472 "Key Data IE", pos, 2 + pos[1]);
473 }
474 }
475
476 return ret;
477}