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1 /*
2  * Wi-Fi Protected Setup - device attributes
3  * Copyright (c) 2008, 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 "includes.h"
16 
17 #include "common.h"
18 #include "wps_i.h"
19 #include "wps_dev_attr.h"
20 
21 
wps_build_manufacturer(struct wps_device_data * dev,struct wpabuf * msg)22 static int wps_build_manufacturer(struct wps_device_data *dev,
23 				  struct wpabuf *msg)
24 {
25 	size_t len;
26 	wpa_printf(MSG_DEBUG, "WPS:  * Manufacturer");
27 	wpabuf_put_be16(msg, ATTR_MANUFACTURER);
28 	len = dev->manufacturer ? os_strlen(dev->manufacturer) : 0;
29 	if (len == 0) {
30 		/*
31 		 * Some deployed WPS implementations fail to parse zero-length
32 		 * attributes. As a workaround, send a null character if the
33 		 * device attribute string is empty.
34 		 */
35 		wpabuf_put_be16(msg, 1);
36 		wpabuf_put_u8(msg, '\0');
37 	} else {
38 		wpabuf_put_be16(msg, len);
39 		wpabuf_put_data(msg, dev->manufacturer, len);
40 	}
41 	return 0;
42 }
43 
44 
wps_build_model_name(struct wps_device_data * dev,struct wpabuf * msg)45 static int wps_build_model_name(struct wps_device_data *dev,
46 				struct wpabuf *msg)
47 {
48 	size_t len;
49 	wpa_printf(MSG_DEBUG, "WPS:  * Model Name");
50 	wpabuf_put_be16(msg, ATTR_MODEL_NAME);
51 	len = dev->model_name ? os_strlen(dev->model_name) : 0;
52 	if (len == 0) {
53 		/*
54 		 * Some deployed WPS implementations fail to parse zero-length
55 		 * attributes. As a workaround, send a null character if the
56 		 * device attribute string is empty.
57 		 */
58 		wpabuf_put_be16(msg, 1);
59 		wpabuf_put_u8(msg, '\0');
60 	} else {
61 		wpabuf_put_be16(msg, len);
62 		wpabuf_put_data(msg, dev->model_name, len);
63 	}
64 	return 0;
65 }
66 
67 
wps_build_model_number(struct wps_device_data * dev,struct wpabuf * msg)68 static int wps_build_model_number(struct wps_device_data *dev,
69 				  struct wpabuf *msg)
70 {
71 	size_t len;
72 	wpa_printf(MSG_DEBUG, "WPS:  * Model Number");
73 	wpabuf_put_be16(msg, ATTR_MODEL_NUMBER);
74 	len = dev->model_number ? os_strlen(dev->model_number) : 0;
75 	if (len == 0) {
76 		/*
77 		 * Some deployed WPS implementations fail to parse zero-length
78 		 * attributes. As a workaround, send a null character if the
79 		 * device attribute string is empty.
80 		 */
81 		wpabuf_put_be16(msg, 1);
82 		wpabuf_put_u8(msg, '\0');
83 	} else {
84 		wpabuf_put_be16(msg, len);
85 		wpabuf_put_data(msg, dev->model_number, len);
86 	}
87 	return 0;
88 }
89 
90 
wps_build_serial_number(struct wps_device_data * dev,struct wpabuf * msg)91 static int wps_build_serial_number(struct wps_device_data *dev,
92 				   struct wpabuf *msg)
93 {
94 	size_t len;
95 	wpa_printf(MSG_DEBUG, "WPS:  * Serial Number");
96 	wpabuf_put_be16(msg, ATTR_SERIAL_NUMBER);
97 	len = dev->serial_number ? os_strlen(dev->serial_number) : 0;
98 	if (len == 0) {
99 		/*
100 		 * Some deployed WPS implementations fail to parse zero-length
101 		 * attributes. As a workaround, send a null character if the
102 		 * device attribute string is empty.
103 		 */
104 		wpabuf_put_be16(msg, 1);
105 		wpabuf_put_u8(msg, '\0');
106 	} else {
107 		wpabuf_put_be16(msg, len);
108 		wpabuf_put_data(msg, dev->serial_number, len);
109 	}
110 	return 0;
111 }
112 
113 
wps_build_primary_dev_type(struct wps_device_data * dev,struct wpabuf * msg)114 int wps_build_primary_dev_type(struct wps_device_data *dev, struct wpabuf *msg)
115 {
116 	struct wps_dev_type *d;
117 	wpa_printf(MSG_DEBUG, "WPS:  * Primary Device Type");
118 	wpabuf_put_be16(msg, ATTR_PRIMARY_DEV_TYPE);
119 	wpabuf_put_be16(msg, sizeof(*d));
120 	d = wpabuf_put(msg, sizeof(*d));
121 	WPA_PUT_BE16(d->categ_id, dev->categ);
122 	WPA_PUT_BE32(d->oui, dev->oui);
123 	WPA_PUT_BE16(d->sub_categ_id, dev->sub_categ);
124 	return 0;
125 }
126 
127 
wps_build_dev_name(struct wps_device_data * dev,struct wpabuf * msg)128 static int wps_build_dev_name(struct wps_device_data *dev, struct wpabuf *msg)
129 {
130 	size_t len;
131 	wpa_printf(MSG_DEBUG, "WPS:  * Device Name");
132 	wpabuf_put_be16(msg, ATTR_DEV_NAME);
133 	len = dev->device_name ? os_strlen(dev->device_name) : 0;
134 	if (len == 0) {
135 		/*
136 		 * Some deployed WPS implementations fail to parse zero-length
137 		 * attributes. As a workaround, send a null character if the
138 		 * device attribute string is empty.
139 		 */
140 		wpabuf_put_be16(msg, 1);
141 		wpabuf_put_u8(msg, '\0');
142 	} else {
143 		wpabuf_put_be16(msg, len);
144 		wpabuf_put_data(msg, dev->device_name, len);
145 	}
146 	return 0;
147 }
148 
149 
wps_build_device_attrs(struct wps_device_data * dev,struct wpabuf * msg)150 int wps_build_device_attrs(struct wps_device_data *dev, struct wpabuf *msg)
151 {
152 	if (wps_build_manufacturer(dev, msg) ||
153 	    wps_build_model_name(dev, msg) ||
154 	    wps_build_model_number(dev, msg) ||
155 	    wps_build_serial_number(dev, msg) ||
156 	    wps_build_primary_dev_type(dev, msg) ||
157 	    wps_build_dev_name(dev, msg))
158 		return -1;
159 	return 0;
160 }
161 
162 
wps_build_os_version(struct wps_device_data * dev,struct wpabuf * msg)163 int wps_build_os_version(struct wps_device_data *dev, struct wpabuf *msg)
164 {
165 	wpa_printf(MSG_DEBUG, "WPS:  * OS Version");
166 	wpabuf_put_be16(msg, ATTR_OS_VERSION);
167 	wpabuf_put_be16(msg, 4);
168 	wpabuf_put_be32(msg, 0x80000000 | dev->os_version);
169 	return 0;
170 }
171 
172 
wps_build_rf_bands(struct wps_device_data * dev,struct wpabuf * msg)173 int wps_build_rf_bands(struct wps_device_data *dev, struct wpabuf *msg)
174 {
175 	wpa_printf(MSG_DEBUG, "WPS:  * RF Bands (%x)", dev->rf_bands);
176 	wpabuf_put_be16(msg, ATTR_RF_BANDS);
177 	wpabuf_put_be16(msg, 1);
178 	wpabuf_put_u8(msg, dev->rf_bands);
179 	return 0;
180 }
181 
182 
wps_process_manufacturer(struct wps_device_data * dev,const u8 * str,size_t str_len)183 static int wps_process_manufacturer(struct wps_device_data *dev, const u8 *str,
184 				    size_t str_len)
185 {
186 	if (str == NULL) {
187 		wpa_printf(MSG_DEBUG, "WPS: No Manufacturer received");
188 		return -1;
189 	}
190 
191 	wpa_hexdump_ascii(MSG_DEBUG, "WPS: Manufacturer", str, str_len);
192 
193 	os_free(dev->manufacturer);
194 	dev->manufacturer = os_malloc(str_len + 1);
195 	if (dev->manufacturer == NULL)
196 		return -1;
197 	os_memcpy(dev->manufacturer, str, str_len);
198 	dev->manufacturer[str_len] = '\0';
199 
200 	return 0;
201 }
202 
203 
wps_process_model_name(struct wps_device_data * dev,const u8 * str,size_t str_len)204 static int wps_process_model_name(struct wps_device_data *dev, const u8 *str,
205 				  size_t str_len)
206 {
207 	if (str == NULL) {
208 		wpa_printf(MSG_DEBUG, "WPS: No Model Name received");
209 		return -1;
210 	}
211 
212 	wpa_hexdump_ascii(MSG_DEBUG, "WPS: Model Name", str, str_len);
213 
214 	os_free(dev->model_name);
215 	dev->model_name = os_malloc(str_len + 1);
216 	if (dev->model_name == NULL)
217 		return -1;
218 	os_memcpy(dev->model_name, str, str_len);
219 	dev->model_name[str_len] = '\0';
220 
221 	return 0;
222 }
223 
224 
wps_process_model_number(struct wps_device_data * dev,const u8 * str,size_t str_len)225 static int wps_process_model_number(struct wps_device_data *dev, const u8 *str,
226 				    size_t str_len)
227 {
228 	if (str == NULL) {
229 		wpa_printf(MSG_DEBUG, "WPS: No Model Number received");
230 		return -1;
231 	}
232 
233 	wpa_hexdump_ascii(MSG_DEBUG, "WPS: Model Number", str, str_len);
234 
235 	os_free(dev->model_number);
236 	dev->model_number = os_malloc(str_len + 1);
237 	if (dev->model_number == NULL)
238 		return -1;
239 	os_memcpy(dev->model_number, str, str_len);
240 	dev->model_number[str_len] = '\0';
241 
242 	return 0;
243 }
244 
245 
wps_process_serial_number(struct wps_device_data * dev,const u8 * str,size_t str_len)246 static int wps_process_serial_number(struct wps_device_data *dev,
247 				     const u8 *str, size_t str_len)
248 {
249 	if (str == NULL) {
250 		wpa_printf(MSG_DEBUG, "WPS: No Serial Number received");
251 		return -1;
252 	}
253 
254 	wpa_hexdump_ascii(MSG_DEBUG, "WPS: Serial Number", str, str_len);
255 
256 	os_free(dev->serial_number);
257 	dev->serial_number = os_malloc(str_len + 1);
258 	if (dev->serial_number == NULL)
259 		return -1;
260 	os_memcpy(dev->serial_number, str, str_len);
261 	dev->serial_number[str_len] = '\0';
262 
263 	return 0;
264 }
265 
266 
wps_process_dev_name(struct wps_device_data * dev,const u8 * str,size_t str_len)267 static int wps_process_dev_name(struct wps_device_data *dev, const u8 *str,
268 				size_t str_len)
269 {
270 	if (str == NULL) {
271 		wpa_printf(MSG_DEBUG, "WPS: No Device Name received");
272 		return -1;
273 	}
274 
275 	wpa_hexdump_ascii(MSG_DEBUG, "WPS: Device Name", str, str_len);
276 
277 	os_free(dev->device_name);
278 	dev->device_name = os_malloc(str_len + 1);
279 	if (dev->device_name == NULL)
280 		return -1;
281 	os_memcpy(dev->device_name, str, str_len);
282 	dev->device_name[str_len] = '\0';
283 
284 	return 0;
285 }
286 
287 
wps_process_primary_dev_type(struct wps_device_data * dev,const u8 * dev_type)288 static int wps_process_primary_dev_type(struct wps_device_data *dev,
289 					const u8 *dev_type)
290 {
291 	struct wps_dev_type *d;
292 
293 	if (dev_type == NULL) {
294 		wpa_printf(MSG_DEBUG, "WPS: No Primary Device Type received");
295 		return -1;
296 	}
297 
298 	d = (struct wps_dev_type *) dev_type;
299 	dev->categ = WPA_GET_BE16(d->categ_id);
300 	dev->oui = WPA_GET_BE32(d->oui);
301 	dev->sub_categ = WPA_GET_BE16(d->sub_categ_id);
302 
303 	wpa_printf(MSG_DEBUG, "WPS: Primary Device Type: category %d "
304 		   "OUI %08x sub-category %d",
305 		   dev->categ, dev->oui, dev->sub_categ);
306 
307 	return 0;
308 }
309 
310 
wps_process_device_attrs(struct wps_device_data * dev,struct wps_parse_attr * attr)311 int wps_process_device_attrs(struct wps_device_data *dev,
312 			     struct wps_parse_attr *attr)
313 {
314 	if (wps_process_manufacturer(dev, attr->manufacturer,
315 				     attr->manufacturer_len) ||
316 	    wps_process_model_name(dev, attr->model_name,
317 				   attr->model_name_len) ||
318 	    wps_process_model_number(dev, attr->model_number,
319 				     attr->model_number_len) ||
320 	    wps_process_serial_number(dev, attr->serial_number,
321 				      attr->serial_number_len) ||
322 	    wps_process_primary_dev_type(dev, attr->primary_dev_type) ||
323 	    wps_process_dev_name(dev, attr->dev_name, attr->dev_name_len))
324 		return -1;
325 	return 0;
326 }
327 
328 
wps_process_os_version(struct wps_device_data * dev,const u8 * ver)329 int wps_process_os_version(struct wps_device_data *dev, const u8 *ver)
330 {
331 	if (ver == NULL) {
332 		wpa_printf(MSG_DEBUG, "WPS: No OS Version received");
333 		return -1;
334 	}
335 
336 	dev->os_version = WPA_GET_BE32(ver);
337 	wpa_printf(MSG_DEBUG, "WPS: OS Version %08x", dev->os_version);
338 
339 	return 0;
340 }
341 
342 
wps_process_rf_bands(struct wps_device_data * dev,const u8 * bands)343 int wps_process_rf_bands(struct wps_device_data *dev, const u8 *bands)
344 {
345 	if (bands == NULL) {
346 		wpa_printf(MSG_DEBUG, "WPS: No RF Bands received");
347 		return -1;
348 	}
349 
350 	dev->rf_bands = *bands;
351 	wpa_printf(MSG_DEBUG, "WPS: Enrollee RF Bands 0x%x", dev->rf_bands);
352 
353 	return 0;
354 }
355 
356 
wps_device_data_dup(struct wps_device_data * dst,const struct wps_device_data * src)357 void wps_device_data_dup(struct wps_device_data *dst,
358 			 const struct wps_device_data *src)
359 {
360 	if (src->device_name)
361 		dst->device_name = os_strdup(src->device_name);
362 	if (src->manufacturer)
363 		dst->manufacturer = os_strdup(src->manufacturer);
364 	if (src->model_name)
365 		dst->model_name = os_strdup(src->model_name);
366 	if (src->model_number)
367 		dst->model_number = os_strdup(src->model_number);
368 	if (src->serial_number)
369 		dst->serial_number = os_strdup(src->serial_number);
370 	dst->categ = src->categ;
371 	dst->oui = src->oui;
372 	dst->sub_categ = src->sub_categ;
373 	dst->os_version = src->os_version;
374 	dst->rf_bands = src->rf_bands;
375 }
376 
377 
wps_device_data_free(struct wps_device_data * dev)378 void wps_device_data_free(struct wps_device_data *dev)
379 {
380 	os_free(dev->device_name);
381 	dev->device_name = NULL;
382 	os_free(dev->manufacturer);
383 	dev->manufacturer = NULL;
384 	os_free(dev->model_name);
385 	dev->model_name = NULL;
386 	os_free(dev->model_number);
387 	dev->model_number = NULL;
388 	os_free(dev->serial_number);
389 	dev->serial_number = NULL;
390 }
391