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d84d3893 JM |
1 | /* |
2 | * BSS list | |
3 | * Copyright (c) 2010, Jouni Malinen <j@w1.fi> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * Alternatively, this software may be distributed under the terms of BSD | |
10 | * license. | |
11 | * | |
12 | * See README and COPYING for more details. | |
13 | */ | |
14 | ||
15 | #include "utils/includes.h" | |
16 | ||
17 | #include "utils/common.h" | |
327f7160 | 18 | #include "common/defs.h" |
b50111fb | 19 | #include "common/ieee802_11_common.h" |
53650bca | 20 | #include "crypto/sha1.h" |
d84d3893 JM |
21 | #include "wlantest.h" |
22 | ||
23 | ||
24 | struct wlantest_bss * bss_get(struct wlantest *wt, const u8 *bssid) | |
25 | { | |
26 | struct wlantest_bss *bss; | |
27 | ||
28 | if (bssid[0] & 0x01) | |
29 | return NULL; /* Skip group addressed frames */ | |
30 | ||
31 | dl_list_for_each(bss, &wt->bss, struct wlantest_bss, list) { | |
32 | if (os_memcmp(bss->bssid, bssid, ETH_ALEN) == 0) | |
33 | return bss; | |
34 | } | |
35 | ||
36 | bss = os_zalloc(sizeof(*bss)); | |
37 | if (bss == NULL) | |
38 | return NULL; | |
422ef7d2 | 39 | dl_list_init(&bss->sta); |
53650bca | 40 | dl_list_init(&bss->pmk); |
d84d3893 JM |
41 | os_memcpy(bss->bssid, bssid, ETH_ALEN); |
42 | dl_list_add(&wt->bss, &bss->list); | |
43 | wpa_printf(MSG_DEBUG, "Discovered new BSS - " MACSTR, | |
44 | MAC2STR(bss->bssid)); | |
45 | return bss; | |
46 | } | |
47 | ||
48 | ||
d06df64d | 49 | void pmk_deinit(struct wlantest_pmk *pmk) |
53650bca JM |
50 | { |
51 | dl_list_del(&pmk->list); | |
52 | os_free(pmk); | |
53 | } | |
54 | ||
55 | ||
d84d3893 JM |
56 | void bss_deinit(struct wlantest_bss *bss) |
57 | { | |
422ef7d2 | 58 | struct wlantest_sta *sta, *n; |
53650bca | 59 | struct wlantest_pmk *pmk, *np; |
422ef7d2 JM |
60 | dl_list_for_each_safe(sta, n, &bss->sta, struct wlantest_sta, list) |
61 | sta_deinit(sta); | |
53650bca JM |
62 | dl_list_for_each_safe(pmk, np, &bss->pmk, struct wlantest_pmk, list) |
63 | pmk_deinit(pmk); | |
d84d3893 JM |
64 | dl_list_del(&bss->list); |
65 | os_free(bss); | |
66 | } | |
b50111fb JM |
67 | |
68 | ||
53650bca JM |
69 | static void bss_add_pmk(struct wlantest *wt, struct wlantest_bss *bss) |
70 | { | |
71 | struct wlantest_passphrase *p; | |
72 | struct wlantest_pmk *pmk; | |
73 | ||
74 | dl_list_for_each(p, &wt->passphrase, struct wlantest_passphrase, list) | |
75 | { | |
76 | if (!is_zero_ether_addr(p->bssid) && | |
77 | os_memcmp(p->bssid, bss->bssid, ETH_ALEN) != 0) | |
78 | continue; | |
79 | if (p->ssid_len && | |
80 | (p->ssid_len != bss->ssid_len || | |
81 | os_memcmp(p->ssid, bss->ssid, p->ssid_len) != 0)) | |
82 | continue; | |
83 | ||
84 | pmk = os_zalloc(sizeof(*pmk)); | |
85 | if (pmk == NULL) | |
86 | break; | |
87 | if (pbkdf2_sha1(p->passphrase, (char *) bss->ssid, | |
88 | bss->ssid_len, 4096, | |
89 | pmk->pmk, sizeof(pmk->pmk)) < 0) { | |
90 | os_free(pmk); | |
91 | continue; | |
92 | } | |
93 | ||
94 | wpa_printf(MSG_INFO, "Add possible PMK for BSSID " MACSTR | |
95 | " based on passphrase '%s'", | |
96 | MAC2STR(bss->bssid), p->passphrase); | |
97 | wpa_hexdump(MSG_DEBUG, "Possible PMK", | |
98 | pmk->pmk, sizeof(pmk->pmk)); | |
99 | dl_list_add(&bss->pmk, &pmk->list); | |
100 | } | |
101 | } | |
102 | ||
103 | ||
104 | void bss_update(struct wlantest *wt, struct wlantest_bss *bss, | |
105 | struct ieee802_11_elems *elems) | |
b50111fb | 106 | { |
327f7160 JM |
107 | struct wpa_ie_data data; |
108 | int update = 0; | |
109 | ||
b50111fb JM |
110 | if (elems->ssid == NULL || elems->ssid_len > 32) { |
111 | wpa_printf(MSG_INFO, "Invalid or missing SSID in a Beacon " | |
112 | "frame for " MACSTR, MAC2STR(bss->bssid)); | |
113 | bss->parse_error_reported = 1; | |
114 | return; | |
115 | } | |
116 | ||
53650bca JM |
117 | if (bss->ssid_len != elems->ssid_len || |
118 | os_memcmp(bss->ssid, elems->ssid, bss->ssid_len) != 0) { | |
119 | wpa_printf(MSG_DEBUG, "Store SSID '%s' for BSSID " MACSTR, | |
120 | wpa_ssid_txt(elems->ssid, elems->ssid_len), | |
121 | MAC2STR(bss->bssid)); | |
122 | os_memcpy(bss->ssid, elems->ssid, elems->ssid_len); | |
123 | bss->ssid_len = elems->ssid_len; | |
124 | bss_add_pmk(wt, bss); | |
125 | } | |
126 | ||
b50111fb JM |
127 | |
128 | if (elems->rsn_ie == NULL) { | |
129 | if (bss->rsnie[0]) { | |
130 | wpa_printf(MSG_INFO, "BSS " MACSTR " - RSN IE removed", | |
131 | MAC2STR(bss->bssid)); | |
132 | bss->rsnie[0] = 0; | |
327f7160 | 133 | update = 1; |
b50111fb JM |
134 | } |
135 | } else { | |
136 | if (bss->rsnie[0] == 0 || | |
137 | os_memcmp(bss->rsnie, elems->rsn_ie - 2, | |
138 | elems->rsn_ie_len + 2) != 0) { | |
139 | wpa_printf(MSG_INFO, "BSS " MACSTR " - RSN IE " | |
140 | "stored", MAC2STR(bss->bssid)); | |
141 | wpa_hexdump(MSG_DEBUG, "RSN IE", elems->rsn_ie - 2, | |
142 | elems->rsn_ie_len + 2); | |
327f7160 | 143 | update = 1; |
b50111fb JM |
144 | } |
145 | os_memcpy(bss->rsnie, elems->rsn_ie - 2, | |
146 | elems->rsn_ie_len + 2); | |
147 | } | |
148 | ||
149 | if (elems->wpa_ie == NULL) { | |
150 | if (bss->wpaie[0]) { | |
151 | wpa_printf(MSG_INFO, "BSS " MACSTR " - WPA IE removed", | |
152 | MAC2STR(bss->bssid)); | |
153 | bss->wpaie[0] = 0; | |
327f7160 | 154 | update = 1; |
b50111fb JM |
155 | } |
156 | } else { | |
157 | if (bss->wpaie[0] == 0 || | |
158 | os_memcmp(bss->wpaie, elems->wpa_ie - 2, | |
159 | elems->wpa_ie_len + 2) != 0) { | |
160 | wpa_printf(MSG_INFO, "BSS " MACSTR " - WPA IE " | |
161 | "stored", MAC2STR(bss->bssid)); | |
162 | wpa_hexdump(MSG_DEBUG, "WPA IE", elems->wpa_ie - 2, | |
163 | elems->wpa_ie_len + 2); | |
327f7160 | 164 | update = 1; |
b50111fb JM |
165 | } |
166 | os_memcpy(bss->wpaie, elems->wpa_ie - 2, | |
167 | elems->wpa_ie_len + 2); | |
168 | } | |
327f7160 JM |
169 | |
170 | if (!update) | |
171 | return; | |
172 | ||
173 | bss->proto = 0; | |
174 | bss->pairwise_cipher = 0; | |
175 | bss->group_cipher = 0; | |
176 | bss->key_mgmt = 0; | |
177 | bss->rsn_capab = 0; | |
178 | bss->mgmt_group_cipher = 0; | |
179 | ||
180 | if (bss->wpaie[0]) { | |
181 | if (wpa_parse_wpa_ie_wpa(bss->wpaie, 2 + bss->wpaie[1], &data) | |
182 | < 0) { | |
183 | wpa_printf(MSG_INFO, "Failed to parse WPA IE from " | |
184 | MACSTR, MAC2STR(bss->bssid)); | |
185 | } else { | |
186 | bss->proto |= data.proto; | |
187 | bss->pairwise_cipher |= data.pairwise_cipher; | |
188 | bss->group_cipher |= data.group_cipher; | |
189 | bss->key_mgmt |= data.key_mgmt; | |
190 | bss->rsn_capab = data.capabilities; | |
191 | bss->mgmt_group_cipher |= data.mgmt_group_cipher; | |
192 | } | |
193 | } | |
194 | ||
195 | if (bss->rsnie[0]) { | |
196 | if (wpa_parse_wpa_ie_rsn(bss->rsnie, 2 + bss->rsnie[1], &data) | |
197 | < 0) { | |
198 | wpa_printf(MSG_INFO, "Failed to parse RSN IE from " | |
199 | MACSTR, MAC2STR(bss->bssid)); | |
200 | } else { | |
201 | bss->proto |= data.proto; | |
202 | bss->pairwise_cipher |= data.pairwise_cipher; | |
203 | bss->group_cipher |= data.group_cipher; | |
204 | bss->key_mgmt |= data.key_mgmt; | |
205 | bss->rsn_capab = data.capabilities; | |
206 | bss->mgmt_group_cipher |= data.mgmt_group_cipher; | |
207 | } | |
208 | } | |
209 | ||
210 | if (!(bss->proto & WPA_PROTO_RSN) || | |
211 | !(bss->rsn_capab & WPA_CAPABILITY_MFPC)) | |
212 | bss->mgmt_group_cipher = 0; | |
213 | ||
214 | wpa_printf(MSG_INFO, "BSS " MACSTR | |
215 | " proto=%s%s%s" | |
216 | "pairwise=%s%s%s%s" | |
217 | "group=%s%s%s%s%s%s" | |
218 | "mgmt_group_cipher=%s" | |
219 | "key_mgmt=%s%s%s%s%s%s%s%s" | |
220 | "rsn_capab=%s%s%s%s%s", | |
221 | MAC2STR(bss->bssid), | |
222 | bss->proto == 0 ? "OPEN " : "", | |
223 | bss->proto & WPA_PROTO_WPA ? "WPA " : "", | |
224 | bss->proto & WPA_PROTO_RSN ? "WPA2 " : "", | |
225 | bss->pairwise_cipher == 0 ? "N/A " : "", | |
226 | bss->pairwise_cipher & WPA_CIPHER_NONE ? "NONE " : "", | |
227 | bss->pairwise_cipher & WPA_CIPHER_TKIP ? "TKIP " : "", | |
228 | bss->pairwise_cipher & WPA_CIPHER_CCMP ? "CCMP " : "", | |
229 | bss->group_cipher == 0 ? "N/A " : "", | |
230 | bss->group_cipher & WPA_CIPHER_NONE ? "NONE " : "", | |
231 | bss->group_cipher & WPA_CIPHER_WEP40 ? "WEP40 " : "", | |
232 | bss->group_cipher & WPA_CIPHER_WEP104 ? "WEP104 " : "", | |
233 | bss->group_cipher & WPA_CIPHER_TKIP ? "TKIP " : "", | |
234 | bss->group_cipher & WPA_CIPHER_CCMP ? "CCMP " : "", | |
235 | bss->mgmt_group_cipher & WPA_CIPHER_AES_128_CMAC ? "BIP " : | |
236 | "N/A ", | |
237 | bss->key_mgmt == 0 ? "N/A " : "", | |
238 | bss->key_mgmt & WPA_KEY_MGMT_IEEE8021X ? "EAP " : "", | |
239 | bss->key_mgmt & WPA_KEY_MGMT_PSK ? "PSK " : "", | |
240 | bss->key_mgmt & WPA_KEY_MGMT_WPA_NONE ? "WPA-NONE " : "", | |
241 | bss->key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X ? "FT-EAP " : "", | |
242 | bss->key_mgmt & WPA_KEY_MGMT_FT_PSK ? "FT-PSK " : "", | |
243 | bss->key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256 ? | |
244 | "EAP-SHA256 " : "", | |
245 | bss->key_mgmt & WPA_KEY_MGMT_PSK_SHA256 ? | |
246 | "PSK-SHA256 " : "", | |
247 | bss->rsn_capab & WPA_CAPABILITY_PREAUTH ? "PREAUTH " : "", | |
248 | bss->rsn_capab & WPA_CAPABILITY_NO_PAIRWISE ? | |
249 | "NO_PAIRWISE " : "", | |
250 | bss->rsn_capab & WPA_CAPABILITY_MFPR ? "MFPR " : "", | |
251 | bss->rsn_capab & WPA_CAPABILITY_MFPC ? "MFPC " : "", | |
252 | bss->rsn_capab & WPA_CAPABILITY_PEERKEY_ENABLED ? | |
253 | "PEERKEY " : ""); | |
b50111fb | 254 | } |
d356bd63 JM |
255 | |
256 | ||
257 | void bss_flush(struct wlantest *wt) | |
258 | { | |
259 | struct wlantest_bss *bss, *n; | |
260 | dl_list_for_each_safe(bss, n, &wt->bss, struct wlantest_bss, list) | |
261 | bss_deinit(bss); | |
262 | } |