Disconnect hostapd from building in base
[dragonfly.git] / contrib / hostapd / src / p2p / p2p_build.c
1 /*
2  * P2P - IE builder
3  * Copyright (c) 2009-2010, Atheros Communications
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
11 #include "common.h"
12 #include "common/ieee802_11_defs.h"
13 #include "wps/wps_i.h"
14 #include "p2p_i.h"
15
16
17 void p2p_buf_add_action_hdr(struct wpabuf *buf, u8 subtype, u8 dialog_token)
18 {
19         wpabuf_put_u8(buf, WLAN_ACTION_VENDOR_SPECIFIC);
20         wpabuf_put_be24(buf, OUI_WFA);
21         wpabuf_put_u8(buf, P2P_OUI_TYPE);
22
23         wpabuf_put_u8(buf, subtype); /* OUI Subtype */
24         wpabuf_put_u8(buf, dialog_token);
25         wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", dialog_token);
26 }
27
28
29 void p2p_buf_add_public_action_hdr(struct wpabuf *buf, u8 subtype,
30                                    u8 dialog_token)
31 {
32         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
33         wpabuf_put_u8(buf, WLAN_PA_VENDOR_SPECIFIC);
34         wpabuf_put_be24(buf, OUI_WFA);
35         wpabuf_put_u8(buf, P2P_OUI_TYPE);
36
37         wpabuf_put_u8(buf, subtype); /* OUI Subtype */
38         wpabuf_put_u8(buf, dialog_token);
39         wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", dialog_token);
40 }
41
42
43 u8 * p2p_buf_add_ie_hdr(struct wpabuf *buf)
44 {
45         u8 *len;
46
47         /* P2P IE header */
48         wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
49         len = wpabuf_put(buf, 1); /* IE length to be filled */
50         wpabuf_put_be24(buf, OUI_WFA);
51         wpabuf_put_u8(buf, P2P_OUI_TYPE);
52         wpa_printf(MSG_DEBUG, "P2P: * P2P IE header");
53         return len;
54 }
55
56
57 void p2p_buf_update_ie_hdr(struct wpabuf *buf, u8 *len)
58 {
59         /* Update P2P IE Length */
60         *len = (u8 *) wpabuf_put(buf, 0) - len - 1;
61 }
62
63
64 void p2p_buf_add_capability(struct wpabuf *buf, u8 dev_capab, u8 group_capab)
65 {
66         /* P2P Capability */
67         wpabuf_put_u8(buf, P2P_ATTR_CAPABILITY);
68         wpabuf_put_le16(buf, 2);
69         wpabuf_put_u8(buf, dev_capab); /* Device Capabilities */
70         wpabuf_put_u8(buf, group_capab); /* Group Capabilities */
71         wpa_printf(MSG_DEBUG, "P2P: * Capability dev=%02x group=%02x",
72                    dev_capab, group_capab);
73 }
74
75
76 void p2p_buf_add_go_intent(struct wpabuf *buf, u8 go_intent)
77 {
78         /* Group Owner Intent */
79         wpabuf_put_u8(buf, P2P_ATTR_GROUP_OWNER_INTENT);
80         wpabuf_put_le16(buf, 1);
81         wpabuf_put_u8(buf, go_intent);
82         wpa_printf(MSG_DEBUG, "P2P: * GO Intent: Intent %u Tie breaker %u",
83                    go_intent >> 1, go_intent & 0x01);
84 }
85
86
87 void p2p_buf_add_listen_channel(struct wpabuf *buf, const char *country,
88                                 u8 reg_class, u8 channel)
89 {
90         /* Listen Channel */
91         wpabuf_put_u8(buf, P2P_ATTR_LISTEN_CHANNEL);
92         wpabuf_put_le16(buf, 5);
93         wpabuf_put_data(buf, country, 3);
94         wpabuf_put_u8(buf, reg_class); /* Regulatory Class */
95         wpabuf_put_u8(buf, channel); /* Channel Number */
96         wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: Regulatory Class %u "
97                    "Channel %u", reg_class, channel);
98 }
99
100
101 void p2p_buf_add_operating_channel(struct wpabuf *buf, const char *country,
102                                    u8 reg_class, u8 channel)
103 {
104         /* Operating Channel */
105         wpabuf_put_u8(buf, P2P_ATTR_OPERATING_CHANNEL);
106         wpabuf_put_le16(buf, 5);
107         wpabuf_put_data(buf, country, 3);
108         wpabuf_put_u8(buf, reg_class); /* Regulatory Class */
109         wpabuf_put_u8(buf, channel); /* Channel Number */
110         wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: Regulatory Class %u "
111                    "Channel %u", reg_class, channel);
112 }
113
114
115 void p2p_buf_add_channel_list(struct wpabuf *buf, const char *country,
116                               struct p2p_channels *chan)
117 {
118         u8 *len;
119         size_t i;
120
121         /* Channel List */
122         wpabuf_put_u8(buf, P2P_ATTR_CHANNEL_LIST);
123         len = wpabuf_put(buf, 2); /* IE length to be filled */
124         wpabuf_put_data(buf, country, 3); /* Country String */
125
126         for (i = 0; i < chan->reg_classes; i++) {
127                 struct p2p_reg_class *c = &chan->reg_class[i];
128                 wpabuf_put_u8(buf, c->reg_class);
129                 wpabuf_put_u8(buf, c->channels);
130                 wpabuf_put_data(buf, c->channel, c->channels);
131         }
132
133         /* Update attribute length */
134         WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2);
135         wpa_hexdump(MSG_DEBUG, "P2P: * Channel List",
136                     len + 2, (u8 *) wpabuf_put(buf, 0) - len - 2);
137 }
138
139
140 void p2p_buf_add_status(struct wpabuf *buf, u8 status)
141 {
142         /* Status */
143         wpabuf_put_u8(buf, P2P_ATTR_STATUS);
144         wpabuf_put_le16(buf, 1);
145         wpabuf_put_u8(buf, status);
146         wpa_printf(MSG_DEBUG, "P2P: * Status: %d", status);
147 }
148
149
150 void p2p_buf_add_device_info(struct wpabuf *buf, struct p2p_data *p2p,
151                              struct p2p_device *peer)
152 {
153         u8 *len;
154         u16 methods;
155         size_t nlen, i;
156
157         /* P2P Device Info */
158         wpabuf_put_u8(buf, P2P_ATTR_DEVICE_INFO);
159         len = wpabuf_put(buf, 2); /* IE length to be filled */
160
161         /* P2P Device address */
162         wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN);
163
164         /* Config Methods */
165         methods = 0;
166         if (peer && peer->wps_method != WPS_NOT_READY) {
167                 if (peer->wps_method == WPS_PBC)
168                         methods |= WPS_CONFIG_PUSHBUTTON;
169                 else if (peer->wps_method == WPS_PIN_DISPLAY ||
170                          peer->wps_method == WPS_PIN_KEYPAD)
171                         methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
172         } else if (p2p->cfg->config_methods) {
173                 methods |= p2p->cfg->config_methods &
174                         (WPS_CONFIG_PUSHBUTTON | WPS_CONFIG_DISPLAY |
175                          WPS_CONFIG_KEYPAD);
176         } else {
177                 methods |= WPS_CONFIG_PUSHBUTTON;
178                 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
179         }
180         wpabuf_put_be16(buf, methods);
181
182         /* Primary Device Type */
183         wpabuf_put_data(buf, p2p->cfg->pri_dev_type,
184                         sizeof(p2p->cfg->pri_dev_type));
185
186         /* Number of Secondary Device Types */
187         wpabuf_put_u8(buf, p2p->cfg->num_sec_dev_types);
188
189         /* Secondary Device Type List */
190         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++)
191                 wpabuf_put_data(buf, p2p->cfg->sec_dev_type[i],
192                                 WPS_DEV_TYPE_LEN);
193
194         /* Device Name */
195         nlen = p2p->cfg->dev_name ? os_strlen(p2p->cfg->dev_name) : 0;
196         wpabuf_put_be16(buf, ATTR_DEV_NAME);
197         wpabuf_put_be16(buf, nlen);
198         wpabuf_put_data(buf, p2p->cfg->dev_name, nlen);
199
200         /* Update attribute length */
201         WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2);
202         wpa_printf(MSG_DEBUG, "P2P: * Device Info");
203 }
204
205
206 void p2p_buf_add_device_id(struct wpabuf *buf, const u8 *dev_addr)
207 {
208         /* P2P Device ID */
209         wpabuf_put_u8(buf, P2P_ATTR_DEVICE_ID);
210         wpabuf_put_le16(buf, ETH_ALEN);
211         wpabuf_put_data(buf, dev_addr, ETH_ALEN);
212         wpa_printf(MSG_DEBUG, "P2P: * Device ID: " MACSTR, MAC2STR(dev_addr));
213 }
214
215
216 void p2p_buf_add_config_timeout(struct wpabuf *buf, u8 go_timeout,
217                                 u8 client_timeout)
218 {
219         /* Configuration Timeout */
220         wpabuf_put_u8(buf, P2P_ATTR_CONFIGURATION_TIMEOUT);
221         wpabuf_put_le16(buf, 2);
222         wpabuf_put_u8(buf, go_timeout);
223         wpabuf_put_u8(buf, client_timeout);
224         wpa_printf(MSG_DEBUG, "P2P: * Configuration Timeout: GO %d (*10ms)  "
225                    "client %d (*10ms)", go_timeout, client_timeout);
226 }
227
228
229 void p2p_buf_add_intended_addr(struct wpabuf *buf, const u8 *interface_addr)
230 {
231         /* Intended P2P Interface Address */
232         wpabuf_put_u8(buf, P2P_ATTR_INTENDED_INTERFACE_ADDR);
233         wpabuf_put_le16(buf, ETH_ALEN);
234         wpabuf_put_data(buf, interface_addr, ETH_ALEN);
235         wpa_printf(MSG_DEBUG, "P2P: * Intended P2P Interface Address " MACSTR,
236                    MAC2STR(interface_addr));
237 }
238
239
240 void p2p_buf_add_group_bssid(struct wpabuf *buf, const u8 *bssid)
241 {
242         /* P2P Group BSSID */
243         wpabuf_put_u8(buf, P2P_ATTR_GROUP_BSSID);
244         wpabuf_put_le16(buf, ETH_ALEN);
245         wpabuf_put_data(buf, bssid, ETH_ALEN);
246         wpa_printf(MSG_DEBUG, "P2P: * P2P Group BSSID " MACSTR,
247                    MAC2STR(bssid));
248 }
249
250
251 void p2p_buf_add_group_id(struct wpabuf *buf, const u8 *dev_addr,
252                           const u8 *ssid, size_t ssid_len)
253 {
254         /* P2P Group ID */
255         wpabuf_put_u8(buf, P2P_ATTR_GROUP_ID);
256         wpabuf_put_le16(buf, ETH_ALEN + ssid_len);
257         wpabuf_put_data(buf, dev_addr, ETH_ALEN);
258         wpabuf_put_data(buf, ssid, ssid_len);
259         wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID " MACSTR,
260                    MAC2STR(dev_addr));
261         wpa_hexdump_ascii(MSG_DEBUG, "P2P: P2P Group ID SSID", ssid, ssid_len);
262 }
263
264
265 void p2p_buf_add_invitation_flags(struct wpabuf *buf, u8 flags)
266 {
267         /* Invitation Flags */
268         wpabuf_put_u8(buf, P2P_ATTR_INVITATION_FLAGS);
269         wpabuf_put_le16(buf, 1);
270         wpabuf_put_u8(buf, flags);
271         wpa_printf(MSG_DEBUG, "P2P: * Invitation Flags: bitmap 0x%x", flags);
272 }
273
274
275 static void p2p_buf_add_noa_desc(struct wpabuf *buf, struct p2p_noa_desc *desc)
276 {
277         if (desc == NULL)
278                 return;
279
280         wpabuf_put_u8(buf, desc->count_type);
281         wpabuf_put_le32(buf, desc->duration);
282         wpabuf_put_le32(buf, desc->interval);
283         wpabuf_put_le32(buf, desc->start_time);
284 }
285
286
287 void p2p_buf_add_noa(struct wpabuf *buf, u8 noa_index, u8 opp_ps, u8 ctwindow,
288                      struct p2p_noa_desc *desc1, struct p2p_noa_desc *desc2)
289 {
290         /* Notice of Absence */
291         wpabuf_put_u8(buf, P2P_ATTR_NOTICE_OF_ABSENCE);
292         wpabuf_put_le16(buf, 2 + (desc1 ? 13 : 0) + (desc2 ? 13 : 0));
293         wpabuf_put_u8(buf, noa_index);
294         wpabuf_put_u8(buf, (opp_ps ? 0x80 : 0) | (ctwindow & 0x7f));
295         p2p_buf_add_noa_desc(buf, desc1);
296         p2p_buf_add_noa_desc(buf, desc2);
297         wpa_printf(MSG_DEBUG, "P2P: * Notice of Absence");
298 }
299
300
301 void p2p_buf_add_ext_listen_timing(struct wpabuf *buf, u16 period,
302                                    u16 interval)
303 {
304         /* Extended Listen Timing */
305         wpabuf_put_u8(buf, P2P_ATTR_EXT_LISTEN_TIMING);
306         wpabuf_put_le16(buf, 4);
307         wpabuf_put_le16(buf, period);
308         wpabuf_put_le16(buf, interval);
309         wpa_printf(MSG_DEBUG, "P2P: * Extended Listen Timing (period %u msec  "
310                    "interval %u msec)", period, interval);
311 }
312
313
314 void p2p_buf_add_p2p_interface(struct wpabuf *buf, struct p2p_data *p2p)
315 {
316         /* P2P Interface */
317         wpabuf_put_u8(buf, P2P_ATTR_INTERFACE);
318         wpabuf_put_le16(buf, ETH_ALEN + 1 + ETH_ALEN);
319         /* P2P Device address */
320         wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN);
321         /*
322          * FIX: Fetch interface address list from driver. Do not include
323          * the P2P Device address if it is never used as interface address.
324          */
325         /* P2P Interface Address Count */
326         wpabuf_put_u8(buf, 1);
327         wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN);
328 }
329
330
331 void p2p_buf_add_oob_go_neg_channel(struct wpabuf *buf, const char *country,
332                                     u8 oper_class, u8 channel,
333                                     enum p2p_role_indication role)
334 {
335         /* OOB Group Owner Negotiation Channel */
336         wpabuf_put_u8(buf, P2P_ATTR_OOB_GO_NEG_CHANNEL);
337         wpabuf_put_le16(buf, 6);
338         wpabuf_put_data(buf, country, 3);
339         wpabuf_put_u8(buf, oper_class); /* Operating Class */
340         wpabuf_put_u8(buf, channel); /* Channel Number */
341         wpabuf_put_u8(buf, (u8) role); /* Role indication */
342         wpa_printf(MSG_DEBUG, "P2P: * OOB GO Negotiation Channel: Operating "
343                    "Class %u Channel %u Role %d",
344                    oper_class, channel, role);
345 }
346
347
348 static int p2p_add_wps_string(struct wpabuf *buf, enum wps_attribute attr,
349                               const char *val)
350 {
351         size_t len;
352
353         len = val ? os_strlen(val) : 0;
354         if (wpabuf_tailroom(buf) < 4 + len)
355                 return -1;
356         wpabuf_put_be16(buf, attr);
357 #ifndef CONFIG_WPS_STRICT
358         if (len == 0) {
359                 /*
360                  * Some deployed WPS implementations fail to parse zeor-length
361                  * attributes. As a workaround, send a space character if the
362                  * device attribute string is empty.
363                  */
364                 if (wpabuf_tailroom(buf) < 3)
365                         return -1;
366                 wpabuf_put_be16(buf, 1);
367                 wpabuf_put_u8(buf, ' ');
368                 return 0;
369         }
370 #endif /* CONFIG_WPS_STRICT */
371         wpabuf_put_be16(buf, len);
372         if (val)
373                 wpabuf_put_data(buf, val, len);
374         return 0;
375 }
376
377
378 int p2p_build_wps_ie(struct p2p_data *p2p, struct wpabuf *buf, int pw_id,
379                      int all_attr)
380 {
381         u8 *len;
382         int i;
383
384         if (wpabuf_tailroom(buf) < 6)
385                 return -1;
386         wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
387         len = wpabuf_put(buf, 1);
388         wpabuf_put_be32(buf, WPS_DEV_OUI_WFA);
389
390         if (wps_build_version(buf) < 0)
391                 return -1;
392
393         if (all_attr) {
394                 if (wpabuf_tailroom(buf) < 5)
395                         return -1;
396                 wpabuf_put_be16(buf, ATTR_WPS_STATE);
397                 wpabuf_put_be16(buf, 1);
398                 wpabuf_put_u8(buf, WPS_STATE_NOT_CONFIGURED);
399         }
400
401         if (pw_id >= 0) {
402                 if (wpabuf_tailroom(buf) < 6)
403                         return -1;
404                 /* Device Password ID */
405                 wpabuf_put_be16(buf, ATTR_DEV_PASSWORD_ID);
406                 wpabuf_put_be16(buf, 2);
407                 wpa_printf(MSG_DEBUG, "P2P: WPS IE Device Password ID: %d",
408                            pw_id);
409                 wpabuf_put_be16(buf, pw_id);
410         }
411
412         if (all_attr) {
413                 if (wpabuf_tailroom(buf) < 5)
414                         return -1;
415                 wpabuf_put_be16(buf, ATTR_RESPONSE_TYPE);
416                 wpabuf_put_be16(buf, 1);
417                 wpabuf_put_u8(buf, WPS_RESP_ENROLLEE_INFO);
418
419                 if (wps_build_uuid_e(buf, p2p->cfg->uuid) < 0 ||
420                     p2p_add_wps_string(buf, ATTR_MANUFACTURER,
421                                        p2p->cfg->manufacturer) < 0 ||
422                     p2p_add_wps_string(buf, ATTR_MODEL_NAME,
423                                        p2p->cfg->model_name) < 0 ||
424                     p2p_add_wps_string(buf, ATTR_MODEL_NUMBER,
425                                        p2p->cfg->model_number) < 0 ||
426                     p2p_add_wps_string(buf, ATTR_SERIAL_NUMBER,
427                                        p2p->cfg->serial_number) < 0)
428                         return -1;
429
430                 if (wpabuf_tailroom(buf) < 4 + WPS_DEV_TYPE_LEN)
431                         return -1;
432                 wpabuf_put_be16(buf, ATTR_PRIMARY_DEV_TYPE);
433                 wpabuf_put_be16(buf, WPS_DEV_TYPE_LEN);
434                 wpabuf_put_data(buf, p2p->cfg->pri_dev_type, WPS_DEV_TYPE_LEN);
435
436                 if (p2p_add_wps_string(buf, ATTR_DEV_NAME, p2p->cfg->dev_name)
437                     < 0)
438                         return -1;
439
440                 if (wpabuf_tailroom(buf) < 6)
441                         return -1;
442                 wpabuf_put_be16(buf, ATTR_CONFIG_METHODS);
443                 wpabuf_put_be16(buf, 2);
444                 wpabuf_put_be16(buf, p2p->cfg->config_methods);
445         }
446
447         if (wps_build_wfa_ext(buf, 0, NULL, 0) < 0)
448                 return -1;
449
450         if (all_attr && p2p->cfg->num_sec_dev_types) {
451                 if (wpabuf_tailroom(buf) <
452                     4 + WPS_DEV_TYPE_LEN * p2p->cfg->num_sec_dev_types)
453                         return -1;
454                 wpabuf_put_be16(buf, ATTR_SECONDARY_DEV_TYPE_LIST);
455                 wpabuf_put_be16(buf, WPS_DEV_TYPE_LEN *
456                                 p2p->cfg->num_sec_dev_types);
457                 wpabuf_put_data(buf, p2p->cfg->sec_dev_type,
458                                 WPS_DEV_TYPE_LEN *
459                                 p2p->cfg->num_sec_dev_types);
460         }
461
462         /* Add the WPS vendor extensions */
463         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
464                 if (p2p->wps_vendor_ext[i] == NULL)
465                         break;
466                 if (wpabuf_tailroom(buf) <
467                     4 + wpabuf_len(p2p->wps_vendor_ext[i]))
468                         continue;
469                 wpabuf_put_be16(buf, ATTR_VENDOR_EXT);
470                 wpabuf_put_be16(buf, wpabuf_len(p2p->wps_vendor_ext[i]));
471                 wpabuf_put_buf(buf, p2p->wps_vendor_ext[i]);
472         }
473
474         p2p_buf_update_ie_hdr(buf, len);
475
476         return 0;
477 }