1 /*
2 * Copyright (c) 2009, Atheros Communications, Inc.
3 * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10 #include <sys/stat.h>
11
12 #include "common.h"
13 #include "eloop.h"
14 #include "common/ieee802_11_common.h"
15 #include "common/ieee802_11_defs.h"
16 #include "common/gas.h"
17 #include "common/wpa_ctrl.h"
18 #include "rsn_supp/wpa.h"
19 #include "wpa_supplicant_i.h"
20 #include "driver_i.h"
21 #include "config.h"
22 #include "scan.h"
23 #include "bss.h"
24 #include "bssid_ignore.h"
25 #include "gas_query.h"
26 #include "interworking.h"
27 #include "hs20_supplicant.h"
28 #include "base64.h"
29 #include "notify.h"
30
31
hs20_configure_frame_filters(struct wpa_supplicant * wpa_s)32 void hs20_configure_frame_filters(struct wpa_supplicant *wpa_s)
33 {
34 struct wpa_bss *bss = wpa_s->current_bss;
35 const u8 *ie;
36 const u8 *ext_capa;
37 u32 filter = 0;
38
39 if (!bss || !is_hs20_network(wpa_s, wpa_s->current_ssid, bss)) {
40 /* Not configuring frame filtering - BSS is not a Hotspot 2.0
41 * network */
42 return;
43 }
44
45 ie = wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE);
46
47 /* Check if DGAF disabled bit is zero (5th byte in the IE) */
48 if (!ie || ie[1] < 5)
49 wpa_printf(MSG_DEBUG,
50 "Not configuring frame filtering - Can't extract DGAF bit");
51 else if (!(ie[6] & HS20_DGAF_DISABLED))
52 filter |= WPA_DATA_FRAME_FILTER_FLAG_GTK;
53
54 ext_capa = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
55 if (!ext_capa || ext_capa[1] < 2) {
56 wpa_printf(MSG_DEBUG,
57 "Not configuring frame filtering - Can't extract Proxy ARP bit");
58 return;
59 }
60
61 if (wpa_bss_ext_capab(bss, WLAN_EXT_CAPAB_PROXY_ARP))
62 filter |= WPA_DATA_FRAME_FILTER_FLAG_ARP |
63 WPA_DATA_FRAME_FILTER_FLAG_NA;
64
65 wpa_drv_configure_frame_filters(wpa_s, filter);
66 }
67
68
wpas_hs20_add_indication(struct wpabuf * buf,int pps_mo_id,int ap_release)69 void wpas_hs20_add_indication(struct wpabuf *buf, int pps_mo_id, int ap_release)
70 {
71 int release;
72 u8 conf;
73
74 release = (HS20_VERSION >> 4) + 1;
75 if (ap_release > 0 && release > ap_release)
76 release = ap_release;
77 if (release < 2)
78 pps_mo_id = -1;
79
80 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
81 wpabuf_put_u8(buf, pps_mo_id >= 0 ? 7 : 5);
82 wpabuf_put_be24(buf, OUI_WFA);
83 wpabuf_put_u8(buf, HS20_INDICATION_OUI_TYPE);
84 conf = (release - 1) << 4;
85 if (pps_mo_id >= 0)
86 conf |= HS20_PPS_MO_ID_PRESENT;
87 wpabuf_put_u8(buf, conf);
88 if (pps_mo_id >= 0)
89 wpabuf_put_le16(buf, pps_mo_id);
90 }
91
92
wpas_hs20_add_roam_cons_sel(struct wpabuf * buf,const struct wpa_ssid * ssid)93 void wpas_hs20_add_roam_cons_sel(struct wpabuf *buf,
94 const struct wpa_ssid *ssid)
95 {
96 if (!ssid->roaming_consortium_selection ||
97 !ssid->roaming_consortium_selection_len)
98 return;
99
100 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
101 wpabuf_put_u8(buf, 4 + ssid->roaming_consortium_selection_len);
102 wpabuf_put_be24(buf, OUI_WFA);
103 wpabuf_put_u8(buf, HS20_ROAMING_CONS_SEL_OUI_TYPE);
104 wpabuf_put_data(buf, ssid->roaming_consortium_selection,
105 ssid->roaming_consortium_selection_len);
106 }
107
108
get_hs20_version(struct wpa_bss * bss)109 int get_hs20_version(struct wpa_bss *bss)
110 {
111 const u8 *ie;
112
113 if (!bss)
114 return 0;
115
116 ie = wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE);
117 if (!ie || ie[1] < 5)
118 return 0;
119
120 return ((ie[6] >> 4) & 0x0f) + 1;
121 }
122
123
is_hs20_network(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid,struct wpa_bss * bss)124 int is_hs20_network(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
125 struct wpa_bss *bss)
126 {
127 if (!wpa_s->conf->hs20 || !ssid)
128 return 0;
129
130 if (ssid->parent_cred)
131 return 1;
132
133 if (bss && !wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE))
134 return 0;
135
136 /*
137 * This may catch some non-Hotspot 2.0 cases, but it is safer to do that
138 * than cause Hotspot 2.0 connections without indication element getting
139 * added. Non-Hotspot 2.0 APs should ignore the unknown vendor element.
140 */
141
142 if (!(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X))
143 return 0;
144 if (!(ssid->pairwise_cipher & WPA_CIPHER_CCMP))
145 return 0;
146 if (ssid->proto != WPA_PROTO_RSN)
147 return 0;
148
149 return 1;
150 }
151
152
hs20_get_pps_mo_id(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid)153 int hs20_get_pps_mo_id(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
154 {
155 struct wpa_cred *cred;
156
157 if (ssid == NULL)
158 return 0;
159
160 if (ssid->update_identifier)
161 return ssid->update_identifier;
162
163 if (ssid->parent_cred == NULL)
164 return 0;
165
166 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
167 if (ssid->parent_cred == cred)
168 return cred->update_identifier;
169 }
170
171 return 0;
172 }
173
174
hs20_put_anqp_req(u32 stypes,const u8 * payload,size_t payload_len,struct wpabuf * buf)175 void hs20_put_anqp_req(u32 stypes, const u8 *payload, size_t payload_len,
176 struct wpabuf *buf)
177 {
178 u8 *len_pos;
179
180 if (buf == NULL)
181 return;
182
183 len_pos = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
184 wpabuf_put_be24(buf, OUI_WFA);
185 wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
186 if (stypes == BIT(HS20_STYPE_NAI_HOME_REALM_QUERY)) {
187 wpabuf_put_u8(buf, HS20_STYPE_NAI_HOME_REALM_QUERY);
188 wpabuf_put_u8(buf, 0); /* Reserved */
189 if (payload)
190 wpabuf_put_data(buf, payload, payload_len);
191 } else {
192 u8 i;
193 wpabuf_put_u8(buf, HS20_STYPE_QUERY_LIST);
194 wpabuf_put_u8(buf, 0); /* Reserved */
195 for (i = 0; i < 32; i++) {
196 if (stypes & BIT(i))
197 wpabuf_put_u8(buf, i);
198 }
199 }
200 gas_anqp_set_element_len(buf, len_pos);
201
202 gas_anqp_set_len(buf);
203 }
204
205
hs20_build_anqp_req(u32 stypes,const u8 * payload,size_t payload_len)206 static struct wpabuf * hs20_build_anqp_req(u32 stypes, const u8 *payload,
207 size_t payload_len)
208 {
209 struct wpabuf *buf;
210
211 buf = gas_anqp_build_initial_req(0, 100 + payload_len);
212 if (buf == NULL)
213 return NULL;
214
215 hs20_put_anqp_req(stypes, payload, payload_len, buf);
216
217 return buf;
218 }
219
220
hs20_anqp_send_req(struct wpa_supplicant * wpa_s,const u8 * dst,u32 stypes,const u8 * payload,size_t payload_len)221 int hs20_anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, u32 stypes,
222 const u8 *payload, size_t payload_len)
223 {
224 struct wpabuf *buf;
225 int ret = 0;
226 int freq;
227 struct wpa_bss *bss;
228 int res;
229
230 bss = wpa_bss_get_bssid(wpa_s, dst);
231 if (!bss) {
232 wpa_printf(MSG_WARNING,
233 "ANQP: Cannot send query to unknown BSS "
234 MACSTR, MAC2STR(dst));
235 return -1;
236 }
237
238 wpa_bss_anqp_unshare_alloc(bss);
239 freq = bss->freq;
240
241 wpa_printf(MSG_DEBUG, "HS20: ANQP Query Request to " MACSTR " for "
242 "subtypes 0x%x", MAC2STR(dst), stypes);
243
244 buf = hs20_build_anqp_req(stypes, payload, payload_len);
245 if (buf == NULL)
246 return -1;
247
248 res = gas_query_req(wpa_s->gas, dst, freq, 0, 0, buf, anqp_resp_cb,
249 wpa_s);
250 if (res < 0) {
251 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
252 wpabuf_free(buf);
253 return -1;
254 } else
255 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
256 "%u", res);
257
258 return ret;
259 }
260
261
hs20_parse_rx_hs20_anqp_resp(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,const u8 * sa,const u8 * data,size_t slen,u8 dialog_token)262 void hs20_parse_rx_hs20_anqp_resp(struct wpa_supplicant *wpa_s,
263 struct wpa_bss *bss, const u8 *sa,
264 const u8 *data, size_t slen, u8 dialog_token)
265 {
266 const u8 *pos = data;
267 u8 subtype;
268 struct wpa_bss_anqp *anqp = NULL;
269
270 if (slen < 2)
271 return;
272
273 if (bss)
274 anqp = bss->anqp;
275
276 subtype = *pos++;
277 slen--;
278
279 pos++; /* Reserved */
280 slen--;
281
282 switch (subtype) {
283 case HS20_STYPE_CAPABILITY_LIST:
284 wpa_msg(wpa_s, MSG_INFO, RX_HS20_ANQP MACSTR
285 " HS Capability List", MAC2STR(sa));
286 wpa_hexdump_ascii(MSG_DEBUG, "HS Capability List", pos, slen);
287 if (anqp) {
288 wpabuf_free(anqp->hs20_capability_list);
289 anqp->hs20_capability_list =
290 wpabuf_alloc_copy(pos, slen);
291 }
292 break;
293 case HS20_STYPE_OPERATOR_FRIENDLY_NAME:
294 wpa_msg(wpa_s, MSG_INFO, RX_HS20_ANQP MACSTR
295 " Operator Friendly Name", MAC2STR(sa));
296 wpa_hexdump_ascii(MSG_DEBUG, "oper friendly name", pos, slen);
297 if (anqp) {
298 wpabuf_free(anqp->hs20_operator_friendly_name);
299 anqp->hs20_operator_friendly_name =
300 wpabuf_alloc_copy(pos, slen);
301 }
302 break;
303 case HS20_STYPE_WAN_METRICS:
304 wpa_hexdump(MSG_DEBUG, "WAN Metrics", pos, slen);
305 if (slen < 13) {
306 wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short WAN "
307 "Metrics value from " MACSTR, MAC2STR(sa));
308 break;
309 }
310 wpa_msg(wpa_s, MSG_INFO, RX_HS20_ANQP MACSTR
311 " WAN Metrics %02x:%u:%u:%u:%u:%u", MAC2STR(sa),
312 pos[0], WPA_GET_LE32(pos + 1), WPA_GET_LE32(pos + 5),
313 pos[9], pos[10], WPA_GET_LE16(pos + 11));
314 if (anqp) {
315 wpabuf_free(anqp->hs20_wan_metrics);
316 anqp->hs20_wan_metrics = wpabuf_alloc_copy(pos, slen);
317 }
318 break;
319 case HS20_STYPE_CONNECTION_CAPABILITY:
320 wpa_msg(wpa_s, MSG_INFO, RX_HS20_ANQP MACSTR
321 " Connection Capability", MAC2STR(sa));
322 wpa_hexdump_ascii(MSG_DEBUG, "conn capability", pos, slen);
323 if (anqp) {
324 wpabuf_free(anqp->hs20_connection_capability);
325 anqp->hs20_connection_capability =
326 wpabuf_alloc_copy(pos, slen);
327 }
328 break;
329 case HS20_STYPE_OPERATING_CLASS:
330 wpa_msg(wpa_s, MSG_INFO, RX_HS20_ANQP MACSTR
331 " Operating Class", MAC2STR(sa));
332 wpa_hexdump_ascii(MSG_DEBUG, "Operating Class", pos, slen);
333 if (anqp) {
334 wpabuf_free(anqp->hs20_operating_class);
335 anqp->hs20_operating_class =
336 wpabuf_alloc_copy(pos, slen);
337 }
338 break;
339 default:
340 wpa_printf(MSG_DEBUG, "HS20: Unsupported subtype %u", subtype);
341 break;
342 }
343 }
344
345
hs20_rx_deauth_imminent_notice(struct wpa_supplicant * wpa_s,u8 code,u16 reauth_delay,const char * url)346 void hs20_rx_deauth_imminent_notice(struct wpa_supplicant *wpa_s, u8 code,
347 u16 reauth_delay, const char *url)
348 {
349 if (!wpa_sm_pmf_enabled(wpa_s->wpa)) {
350 wpa_printf(MSG_DEBUG, "HS 2.0: Ignore deauthentication imminent notice since PMF was not enabled");
351 return;
352 }
353
354 wpa_msg(wpa_s, MSG_INFO, HS20_DEAUTH_IMMINENT_NOTICE "%u %u %s",
355 code, reauth_delay, url);
356
357 if (code == HS20_DEAUTH_REASON_CODE_BSS) {
358 wpa_printf(MSG_DEBUG, "HS 2.0: Add BSS to ignore list");
359 wpa_bssid_ignore_add(wpa_s, wpa_s->bssid);
360 /* TODO: For now, disable full ESS since some drivers may not
361 * support disabling per BSS. */
362 if (wpa_s->current_ssid) {
363 struct os_reltime now;
364 os_get_reltime(&now);
365 if (now.sec + reauth_delay <=
366 wpa_s->current_ssid->disabled_until.sec)
367 return;
368 wpa_printf(MSG_DEBUG, "HS 2.0: Disable network for %u seconds (BSS)",
369 reauth_delay);
370 wpa_s->current_ssid->disabled_until.sec =
371 now.sec + reauth_delay;
372 }
373 }
374
375 if (code == HS20_DEAUTH_REASON_CODE_ESS && wpa_s->current_ssid) {
376 struct os_reltime now;
377 os_get_reltime(&now);
378 if (now.sec + reauth_delay <=
379 wpa_s->current_ssid->disabled_until.sec)
380 return;
381 wpa_printf(MSG_DEBUG, "HS 2.0: Disable network for %u seconds",
382 reauth_delay);
383 wpa_s->current_ssid->disabled_until.sec =
384 now.sec + reauth_delay;
385 }
386 }
387
388
hs20_rx_t_c_acceptance(struct wpa_supplicant * wpa_s,const char * url)389 void hs20_rx_t_c_acceptance(struct wpa_supplicant *wpa_s, const char *url)
390 {
391 if (!wpa_sm_pmf_enabled(wpa_s->wpa)) {
392 wpa_printf(MSG_DEBUG,
393 "HS 2.0: Ignore Terms and Conditions Acceptance since PMF was not enabled");
394 return;
395 }
396
397 wpas_notify_hs20_t_c_acceptance(wpa_s, url);
398 }
399