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1/*
2 * BSS list
3 * Copyright (c) 2010, 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 "utils/includes.h"
10
11#include "utils/common.h"
327f7160 12#include "common/defs.h"
2e479416 13#include "common/ieee802_11_defs.h"
b50111fb 14#include "common/ieee802_11_common.h"
53650bca 15#include "crypto/sha1.h"
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16#include "wlantest.h"
17
18
57f7d03f 19struct wlantest_bss * bss_find(struct wlantest *wt, const u8 *bssid)
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20{
21 struct wlantest_bss *bss;
22
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23 dl_list_for_each(bss, &wt->bss, struct wlantest_bss, list) {
24 if (os_memcmp(bss->bssid, bssid, ETH_ALEN) == 0)
25 return bss;
26 }
27
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28 return NULL;
29}
30
31
32struct wlantest_bss * bss_get(struct wlantest *wt, const u8 *bssid)
33{
34 struct wlantest_bss *bss;
35
36 if (bssid[0] & 0x01)
37 return NULL; /* Skip group addressed frames */
38
39 bss = bss_find(wt, bssid);
40 if (bss)
41 return bss;
42
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43 bss = os_zalloc(sizeof(*bss));
44 if (bss == NULL)
45 return NULL;
422ef7d2 46 dl_list_init(&bss->sta);
53650bca 47 dl_list_init(&bss->pmk);
b39f5834 48 dl_list_init(&bss->tdls);
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49 os_memcpy(bss->bssid, bssid, ETH_ALEN);
50 dl_list_add(&wt->bss, &bss->list);
51 wpa_printf(MSG_DEBUG, "Discovered new BSS - " MACSTR,
52 MAC2STR(bss->bssid));
53 return bss;
54}
55
56
d06df64d 57void pmk_deinit(struct wlantest_pmk *pmk)
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58{
59 dl_list_del(&pmk->list);
60 os_free(pmk);
61}
62
63
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64void tdls_deinit(struct wlantest_tdls *tdls)
65{
66 dl_list_del(&tdls->list);
67 os_free(tdls);
68}
69
70
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71void bss_deinit(struct wlantest_bss *bss)
72{
422ef7d2 73 struct wlantest_sta *sta, *n;
53650bca 74 struct wlantest_pmk *pmk, *np;
b39f5834 75 struct wlantest_tdls *tdls, *nt;
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76 dl_list_for_each_safe(sta, n, &bss->sta, struct wlantest_sta, list)
77 sta_deinit(sta);
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78 dl_list_for_each_safe(pmk, np, &bss->pmk, struct wlantest_pmk, list)
79 pmk_deinit(pmk);
b39f5834 80 dl_list_for_each_safe(tdls, nt, &bss->tdls, struct wlantest_tdls, list)
0d2e395d 81 tdls_deinit(tdls);
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82 dl_list_del(&bss->list);
83 os_free(bss);
84}
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85
86
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87int bss_add_pmk_from_passphrase(struct wlantest_bss *bss,
88 const char *passphrase)
89{
90 struct wlantest_pmk *pmk;
91
92 pmk = os_zalloc(sizeof(*pmk));
93 if (pmk == NULL)
94 return -1;
add11058 95 if (pbkdf2_sha1(passphrase, bss->ssid, bss->ssid_len, 4096,
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96 pmk->pmk, sizeof(pmk->pmk)) < 0) {
97 os_free(pmk);
98 return -1;
99 }
100
101 wpa_printf(MSG_INFO, "Add possible PMK for BSSID " MACSTR
102 " based on passphrase '%s'",
103 MAC2STR(bss->bssid), passphrase);
104 wpa_hexdump(MSG_DEBUG, "Possible PMK", pmk->pmk, sizeof(pmk->pmk));
105 dl_list_add(&bss->pmk, &pmk->list);
106
107 return 0;
108}
109
110
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111static void bss_add_pmk(struct wlantest *wt, struct wlantest_bss *bss)
112{
113 struct wlantest_passphrase *p;
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114
115 dl_list_for_each(p, &wt->passphrase, struct wlantest_passphrase, list)
116 {
117 if (!is_zero_ether_addr(p->bssid) &&
118 os_memcmp(p->bssid, bss->bssid, ETH_ALEN) != 0)
119 continue;
120 if (p->ssid_len &&
121 (p->ssid_len != bss->ssid_len ||
122 os_memcmp(p->ssid, bss->ssid, p->ssid_len) != 0))
123 continue;
124
221519de 125 if (bss_add_pmk_from_passphrase(bss, p->passphrase) < 0)
53650bca 126 break;
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127 }
128}
129
130
131void bss_update(struct wlantest *wt, struct wlantest_bss *bss,
132 struct ieee802_11_elems *elems)
b50111fb 133{
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134 struct wpa_ie_data data;
135 int update = 0;
136
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137 if (bss->capab_info != bss->prev_capab_info)
138 update = 1;
139
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140 if (elems->ssid == NULL || elems->ssid_len > 32) {
141 wpa_printf(MSG_INFO, "Invalid or missing SSID in a Beacon "
142 "frame for " MACSTR, MAC2STR(bss->bssid));
143 bss->parse_error_reported = 1;
144 return;
145 }
146
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147 if (bss->ssid_len != elems->ssid_len ||
148 os_memcmp(bss->ssid, elems->ssid, bss->ssid_len) != 0) {
149 wpa_printf(MSG_DEBUG, "Store SSID '%s' for BSSID " MACSTR,
150 wpa_ssid_txt(elems->ssid, elems->ssid_len),
151 MAC2STR(bss->bssid));
152 os_memcpy(bss->ssid, elems->ssid, elems->ssid_len);
153 bss->ssid_len = elems->ssid_len;
154 bss_add_pmk(wt, bss);
155 }
156
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157
158 if (elems->rsn_ie == NULL) {
159 if (bss->rsnie[0]) {
160 wpa_printf(MSG_INFO, "BSS " MACSTR " - RSN IE removed",
161 MAC2STR(bss->bssid));
162 bss->rsnie[0] = 0;
327f7160 163 update = 1;
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164 }
165 } else {
166 if (bss->rsnie[0] == 0 ||
167 os_memcmp(bss->rsnie, elems->rsn_ie - 2,
168 elems->rsn_ie_len + 2) != 0) {
169 wpa_printf(MSG_INFO, "BSS " MACSTR " - RSN IE "
170 "stored", MAC2STR(bss->bssid));
171 wpa_hexdump(MSG_DEBUG, "RSN IE", elems->rsn_ie - 2,
172 elems->rsn_ie_len + 2);
327f7160 173 update = 1;
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174 }
175 os_memcpy(bss->rsnie, elems->rsn_ie - 2,
176 elems->rsn_ie_len + 2);
177 }
178
179 if (elems->wpa_ie == NULL) {
180 if (bss->wpaie[0]) {
181 wpa_printf(MSG_INFO, "BSS " MACSTR " - WPA IE removed",
182 MAC2STR(bss->bssid));
183 bss->wpaie[0] = 0;
327f7160 184 update = 1;
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185 }
186 } else {
187 if (bss->wpaie[0] == 0 ||
188 os_memcmp(bss->wpaie, elems->wpa_ie - 2,
189 elems->wpa_ie_len + 2) != 0) {
190 wpa_printf(MSG_INFO, "BSS " MACSTR " - WPA IE "
191 "stored", MAC2STR(bss->bssid));
192 wpa_hexdump(MSG_DEBUG, "WPA IE", elems->wpa_ie - 2,
193 elems->wpa_ie_len + 2);
327f7160 194 update = 1;
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195 }
196 os_memcpy(bss->wpaie, elems->wpa_ie - 2,
197 elems->wpa_ie_len + 2);
198 }
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199
200 if (!update)
201 return;
202
2e479416 203 bss->prev_capab_info = bss->capab_info;
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204 bss->proto = 0;
205 bss->pairwise_cipher = 0;
206 bss->group_cipher = 0;
207 bss->key_mgmt = 0;
208 bss->rsn_capab = 0;
209 bss->mgmt_group_cipher = 0;
210
211 if (bss->wpaie[0]) {
212 if (wpa_parse_wpa_ie_wpa(bss->wpaie, 2 + bss->wpaie[1], &data)
213 < 0) {
214 wpa_printf(MSG_INFO, "Failed to parse WPA IE from "
215 MACSTR, MAC2STR(bss->bssid));
216 } else {
217 bss->proto |= data.proto;
218 bss->pairwise_cipher |= data.pairwise_cipher;
219 bss->group_cipher |= data.group_cipher;
220 bss->key_mgmt |= data.key_mgmt;
221 bss->rsn_capab = data.capabilities;
222 bss->mgmt_group_cipher |= data.mgmt_group_cipher;
223 }
224 }
225
226 if (bss->rsnie[0]) {
227 if (wpa_parse_wpa_ie_rsn(bss->rsnie, 2 + bss->rsnie[1], &data)
228 < 0) {
229 wpa_printf(MSG_INFO, "Failed to parse RSN IE from "
230 MACSTR, MAC2STR(bss->bssid));
231 } else {
232 bss->proto |= data.proto;
233 bss->pairwise_cipher |= data.pairwise_cipher;
234 bss->group_cipher |= data.group_cipher;
235 bss->key_mgmt |= data.key_mgmt;
236 bss->rsn_capab = data.capabilities;
237 bss->mgmt_group_cipher |= data.mgmt_group_cipher;
238 }
239 }
240
241 if (!(bss->proto & WPA_PROTO_RSN) ||
242 !(bss->rsn_capab & WPA_CAPABILITY_MFPC))
243 bss->mgmt_group_cipher = 0;
244
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245 if (!bss->wpaie[0] && !bss->rsnie[0] &&
246 (bss->capab_info & WLAN_CAPABILITY_PRIVACY))
247 bss->group_cipher = WPA_CIPHER_WEP40;
248
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249 wpa_printf(MSG_INFO, "BSS " MACSTR
250 " proto=%s%s%s"
251 "pairwise=%s%s%s%s"
252 "group=%s%s%s%s%s%s"
253 "mgmt_group_cipher=%s"
254 "key_mgmt=%s%s%s%s%s%s%s%s"
255 "rsn_capab=%s%s%s%s%s",
256 MAC2STR(bss->bssid),
257 bss->proto == 0 ? "OPEN " : "",
258 bss->proto & WPA_PROTO_WPA ? "WPA " : "",
259 bss->proto & WPA_PROTO_RSN ? "WPA2 " : "",
260 bss->pairwise_cipher == 0 ? "N/A " : "",
261 bss->pairwise_cipher & WPA_CIPHER_NONE ? "NONE " : "",
262 bss->pairwise_cipher & WPA_CIPHER_TKIP ? "TKIP " : "",
263 bss->pairwise_cipher & WPA_CIPHER_CCMP ? "CCMP " : "",
264 bss->group_cipher == 0 ? "N/A " : "",
265 bss->group_cipher & WPA_CIPHER_NONE ? "NONE " : "",
266 bss->group_cipher & WPA_CIPHER_WEP40 ? "WEP40 " : "",
267 bss->group_cipher & WPA_CIPHER_WEP104 ? "WEP104 " : "",
268 bss->group_cipher & WPA_CIPHER_TKIP ? "TKIP " : "",
269 bss->group_cipher & WPA_CIPHER_CCMP ? "CCMP " : "",
270 bss->mgmt_group_cipher & WPA_CIPHER_AES_128_CMAC ? "BIP " :
271 "N/A ",
272 bss->key_mgmt == 0 ? "N/A " : "",
273 bss->key_mgmt & WPA_KEY_MGMT_IEEE8021X ? "EAP " : "",
274 bss->key_mgmt & WPA_KEY_MGMT_PSK ? "PSK " : "",
275 bss->key_mgmt & WPA_KEY_MGMT_WPA_NONE ? "WPA-NONE " : "",
276 bss->key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X ? "FT-EAP " : "",
277 bss->key_mgmt & WPA_KEY_MGMT_FT_PSK ? "FT-PSK " : "",
278 bss->key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256 ?
279 "EAP-SHA256 " : "",
280 bss->key_mgmt & WPA_KEY_MGMT_PSK_SHA256 ?
281 "PSK-SHA256 " : "",
282 bss->rsn_capab & WPA_CAPABILITY_PREAUTH ? "PREAUTH " : "",
283 bss->rsn_capab & WPA_CAPABILITY_NO_PAIRWISE ?
284 "NO_PAIRWISE " : "",
285 bss->rsn_capab & WPA_CAPABILITY_MFPR ? "MFPR " : "",
286 bss->rsn_capab & WPA_CAPABILITY_MFPC ? "MFPC " : "",
287 bss->rsn_capab & WPA_CAPABILITY_PEERKEY_ENABLED ?
288 "PEERKEY " : "");
b50111fb 289}
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290
291
292void bss_flush(struct wlantest *wt)
293{
294 struct wlantest_bss *bss, *n;
295 dl_list_for_each_safe(bss, n, &wt->bss, struct wlantest_bss, list)
296 bss_deinit(bss);
297}