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