2  * P2P - generic helper functions
18  * p2p_random - Generate random string for SSID and passphrase
21  * Returns: 0 on success, -1 on failure
24  * 'A'-'Z', 'a'-'z', '0'-'9'.
30 	u8 letters = 'Z' - 'A' + 1;  in p2p_random()
34 		return -1;  in p2p_random()
35 	/* Character set: 'A'-'Z', 'a'-'z', '0'-'9' */  in p2p_random()
36 	for (i = 0; i < len; i++) {  in p2p_random()
42 			buf[i] = 'a' + (val - letters);  in p2p_random()
44 			buf[i] = '0' + (val - 2 * letters);  in p2p_random()
47 	return 0;  in p2p_random()
52  * p2p_channel_to_freq - Convert channel info to frequency
54  * @channel: Channel number
55  * Returns: Frequency in MHz or -1 if the specified channel is unknown
57 int p2p_channel_to_freq(int op_class, int channel)  in p2p_channel_to_freq()  argument
59 	return ieee80211_chan_to_freq(NULL, op_class, channel);  in p2p_channel_to_freq()
64  * p2p_freq_to_channel - Convert frequency into channel info
66  * @channel: Buffer for returning channel number
67  * Returns: 0 on success, -1 if the specified frequency is unknown
69 int p2p_freq_to_channel(unsigned int freq, u8 *op_class, u8 *channel)  in p2p_freq_to_channel()  argument
71 	if (ieee80211_freq_to_channel_ext(freq, 0, 0, op_class, channel) ==  in p2p_freq_to_channel()
73 		return -1;  in p2p_freq_to_channel()
75 	return 0;  in p2p_freq_to_channel()
85 	res->reg_class = a->reg_class;  in p2p_reg_class_intersect()
87 	for (i = 0; i < a->channels; i++) {  in p2p_reg_class_intersect()
88 		for (j = 0; j < b->channels; j++) {  in p2p_reg_class_intersect()
89 			if (a->channel[i] != b->channel[j])  in p2p_reg_class_intersect()
91 			res->channel[res->channels] = a->channel[i];  in p2p_reg_class_intersect()
92 			res->channels++;  in p2p_reg_class_intersect()
93 			if (res->channels == P2P_MAX_REG_CLASS_CHANNELS)  in p2p_reg_class_intersect()
101  * p2p_channels_intersect - Intersection of supported channel lists
117 	os_memset(res, 0, sizeof(*res));  in p2p_channels_intersect()
119 	for (i = 0; i < a->reg_classes; i++) {  in p2p_channels_intersect()
120 		const struct p2p_reg_class *a_reg = &a->reg_class[i];  in p2p_channels_intersect()
121 		for (j = 0; j < b->reg_classes; j++) {  in p2p_channels_intersect()
122 			const struct p2p_reg_class *b_reg = &b->reg_class[j];  in p2p_channels_intersect()
123 			if (a_reg->reg_class != b_reg->reg_class)  in p2p_channels_intersect()
127 				&res->reg_class[res->reg_classes]);  in p2p_channels_intersect()
128 			if (res->reg_class[res->reg_classes].channels) {  in p2p_channels_intersect()
129 				res->reg_classes++;  in p2p_channels_intersect()
130 				if (res->reg_classes == P2P_MAX_REG_CLASSES)  in p2p_channels_intersect()
143 	for (i = 0; i < b_cl->channels; i++) {  in p2p_op_class_union()
144 		for (j = 0; j < cl->channels; j++) {  in p2p_op_class_union()
145 			if (b_cl->channel[i] == cl->channel[j])  in p2p_op_class_union()
148 		if (j == cl->channels) {  in p2p_op_class_union()
149 			if (cl->channels == P2P_MAX_REG_CLASS_CHANNELS)  in p2p_op_class_union()
151 			cl->channel[cl->channels++] = b_cl->channel[i];  in p2p_op_class_union()
158  * p2p_channels_union_inplace - Inplace union of channel lists
159  * @res: Input data and place for returning union of the channel sets
167 	for (i = 0; i < res->reg_classes; i++) {  in p2p_channels_union_inplace()
168 		struct p2p_reg_class *cl = &res->reg_class[i];  in p2p_channels_union_inplace()
169 		for (j = 0; j < b->reg_classes; j++) {  in p2p_channels_union_inplace()
170 			const struct p2p_reg_class *b_cl = &b->reg_class[j];  in p2p_channels_union_inplace()
171 			if (cl->reg_class != b_cl->reg_class)  in p2p_channels_union_inplace()
177 	for (j = 0; j < b->reg_classes; j++) {  in p2p_channels_union_inplace()
178 		const struct p2p_reg_class *b_cl = &b->reg_class[j];  in p2p_channels_union_inplace()
180 		for (i = 0; i < res->reg_classes; i++) {  in p2p_channels_union_inplace()
181 			struct p2p_reg_class *cl = &res->reg_class[i];  in p2p_channels_union_inplace()
182 			if (cl->reg_class == b_cl->reg_class)  in p2p_channels_union_inplace()
186 		if (i == res->reg_classes) {  in p2p_channels_union_inplace()
187 			if (res->reg_classes == P2P_MAX_REG_CLASSES)  in p2p_channels_union_inplace()
189 			os_memcpy(&res->reg_class[res->reg_classes++],  in p2p_channels_union_inplace()
197  * p2p_channels_union - Union of channel lists
219 	o = 0;  in p2p_channels_remove_freqs()
220 	while (o < chan->reg_classes) {  in p2p_channels_remove_freqs()
221 		struct p2p_reg_class *op = &chan->reg_class[o];  in p2p_channels_remove_freqs()
223 		c = 0;  in p2p_channels_remove_freqs()
224 		while (c < op->channels) {  in p2p_channels_remove_freqs()
225 			int freq = p2p_channel_to_freq(op->reg_class,  in p2p_channels_remove_freqs()
226 						       op->channel[c]);  in p2p_channels_remove_freqs()
227 			if (freq > 0 && freq_range_list_includes(list, freq)) {  in p2p_channels_remove_freqs()
228 				op->channels--;  in p2p_channels_remove_freqs()
229 				os_memmove(&op->channel[c],  in p2p_channels_remove_freqs()
230 					   &op->channel[c + 1],  in p2p_channels_remove_freqs()
231 					   op->channels - c);  in p2p_channels_remove_freqs()
236 		if (op->channels == 0) {  in p2p_channels_remove_freqs()
237 			chan->reg_classes--;  in p2p_channels_remove_freqs()
238 			os_memmove(&chan->reg_class[o], &chan->reg_class[o + 1],  in p2p_channels_remove_freqs()
239 				   (chan->reg_classes - o) *  in p2p_channels_remove_freqs()
248  * p2p_channels_includes - Check whether a channel is included in the list
250  * @reg_class: Regulatory class of the channel to search
251  * @channel: Channel number of the channel to search
252  * Returns: 1 if channel was found or 0 if not
255 			  u8 channel)  in p2p_channels_includes()  argument
258 	for (i = 0; i < channels->reg_classes; i++) {  in p2p_channels_includes()
259 		const struct p2p_reg_class *reg = &channels->reg_class[i];  in p2p_channels_includes()
260 		if (reg->reg_class != reg_class)  in p2p_channels_includes()
262 		for (j = 0; j < reg->channels; j++) {  in p2p_channels_includes()
263 			if (reg->channel[j] == channel)  in p2p_channels_includes()
267 	return 0;  in p2p_channels_includes()
275 	for (i = 0; i < channels->reg_classes; i++) {  in p2p_channels_includes_freq()
276 		const struct p2p_reg_class *reg = &channels->reg_class[i];  in p2p_channels_includes_freq()
277 		for (j = 0; j < reg->channels; j++) {  in p2p_channels_includes_freq()
278 			if (p2p_channel_to_freq(reg->reg_class,  in p2p_channels_includes_freq()
279 						reg->channel[j]) == (int) freq)  in p2p_channels_includes_freq()
283 	return 0;  in p2p_channels_includes_freq()
290 	if (p2p_freq_to_channel(freq, &op_reg_class, &op_channel) < 0)  in p2p_supported_freq()
291 		return 0;  in p2p_supported_freq()
292 	return p2p_channels_includes(&p2p->cfg->channels, op_reg_class,  in p2p_supported_freq()
300 	if (p2p_freq_to_channel(freq, &op_reg_class, &op_channel) < 0)  in p2p_supported_freq_go()
301 		return 0;  in p2p_supported_freq_go()
302 	return p2p_channels_includes(&p2p->cfg->channels, op_reg_class,  in p2p_supported_freq_go()
304 		!freq_range_list_includes(&p2p->no_go_freq, freq);  in p2p_supported_freq_go()
311 	if (p2p_freq_to_channel(freq, &op_reg_class, &op_channel) < 0)  in p2p_supported_freq_cli()
312 		return 0;  in p2p_supported_freq_cli()
313 	return p2p_channels_includes(&p2p->cfg->channels, op_reg_class,  in p2p_supported_freq_cli()
315 		p2p_channels_includes(&p2p->cfg->cli_channels, op_reg_class,  in p2p_supported_freq_cli()
324 	int freq = 0;  in p2p_get_pref_freq()
326 		channels : &p2p->cfg->channels;  in p2p_get_pref_freq()
329 		return 0;  in p2p_get_pref_freq()
331 	for (i = 0; p2p->cfg->pref_chan && i < p2p->cfg->num_pref_chan; i++) {  in p2p_get_pref_freq()
332 		freq = p2p_channel_to_freq(p2p->cfg->pref_chan[i].op_class,  in p2p_get_pref_freq()
333 					   p2p->cfg->pref_chan[i].chan);  in p2p_get_pref_freq()
337 	return 0;  in p2p_get_pref_freq()
351 	for (i = 0; i < chan->reg_classes; i++) {  in p2p_channels_dump()
353 		c = &chan->reg_class[i];  in p2p_channels_dump()
354 		ret = os_snprintf(pos, end - pos, " %u:", c->reg_class);  in p2p_channels_dump()
355 		if (os_snprintf_error(end - pos, ret))  in p2p_channels_dump()
359 		for (j = 0; j < c->channels; j++) {  in p2p_channels_dump()
360 			ret = os_snprintf(pos, end - pos, "%s%u",  in p2p_channels_dump()
361 					  j == 0 ? "" : ",",  in p2p_channels_dump()
362 					  c->channel[j]);  in p2p_channels_dump()
363 			if (os_snprintf_error(end - pos, ret))  in p2p_channels_dump()
368 	*pos = '\0';  in p2p_channels_dump()
377 	if (os_get_random((u8 *) &r, sizeof(r)) < 0)  in p2p_channel_pick_random()
378 		r = 0;  in p2p_channel_pick_random()
389 	for (j = 0; classes == NULL || classes[j]; j++) {  in p2p_channel_select()
390 		for (i = 0; i < chans->reg_classes; i++) {  in p2p_channel_select()
391 			struct p2p_reg_class *c = &chans->reg_class[i];  in p2p_channel_select()
393 			if (c->channels == 0)  in p2p_channel_select()
396 			if (classes == NULL || c->reg_class == classes[j]) {  in p2p_channel_select()
401 				*op_class = c->reg_class;  in p2p_channel_select()
403 					c->channel, c->channels);  in p2p_channel_select()
404 				return 0;  in p2p_channel_select()
411 	return -1;  in p2p_channel_select()
421 	unsigned int num_channels = 0;  in p2p_channel_random_social()
425 	 * channel is not allowed by p2p_channels_includes() rules. However, it  in p2p_channel_random_social()
427 	 * here for social channel selection unless explicitly disallowed in the  in p2p_channel_random_social()
446 	if (num_channels == 0)  in p2p_channel_random_social()
447 		return -1;  in p2p_channel_random_social()
455 	return 0;  in p2p_channel_random_social()
464 	if (!channels || max_len == 0)  in p2p_channels_to_freqs()
465 		return 0;  in p2p_channels_to_freqs()
467 	for (i = 0, idx = 0; i < channels->reg_classes; i++) {  in p2p_channels_to_freqs()
468 		const struct p2p_reg_class *c = &channels->reg_class[i];  in p2p_channels_to_freqs()
473 		for (j = 0; j < c->channels; j++) {  in p2p_channels_to_freqs()
479 			freq = p2p_channel_to_freq(c->reg_class,  in p2p_channels_to_freqs()
480 						   c->channel[j]);  in p2p_channels_to_freqs()
481 			if (freq < 0)  in p2p_channels_to_freqs()
484 			for (k = 0; k < idx; k++) {  in p2p_channels_to_freqs()
495 	freq_list[idx] = 0;  in p2p_channels_to_freqs()
511 	for (i = 0, j = 0; i < src->reg_classes; i++) {  in p2p_copy_channels()
512 		if (is_6ghz_op_class(src->reg_class[i].reg_class))  in p2p_copy_channels()
514 		os_memcpy(&dst->reg_class[j], &src->reg_class[i],  in p2p_copy_channels()
518 	dst->reg_classes = j;  in p2p_copy_channels()
526 	for (i = 0; i < size; i++) {  in p2p_remove_6ghz_channels()
528 			wpa_printf(MSG_DEBUG, "P2P: Remove 6 GHz channel %d",  in p2p_remove_6ghz_channels()
530 			size--;  in p2p_remove_6ghz_channels()
532 				   (size - i) * sizeof(pref_freq_list[0]));  in p2p_remove_6ghz_channels()
533 			i--;  in p2p_remove_6ghz_channels()
541  * p2p_pref_freq_allowed - Based on the flags set, check if the preferred
543  * @freq_list: Weighted preferred channel list
549 	if (freq_list->flag & WEIGHTED_PCL_EXCLUDE)  in p2p_pref_freq_allowed()
551 	if (!(freq_list->flag & WEIGHTED_PCL_CLI) && !go)  in p2p_pref_freq_allowed()
553 	if (!(freq_list->flag & WEIGHTED_PCL_GO) && go)  in p2p_pref_freq_allowed()
559 static int p2p_check_pref_channel(int channel, u8 op_class,  in p2p_check_pref_channel()  argument
565 	/* If the channel is present in the preferred channel list, check if it  in p2p_check_pref_channel()
568 	for (i = 0; i < num_channels; i++) {  in p2p_check_pref_channel()
569 		if (p2p_channel_to_freq(op_class, channel) !=  in p2p_check_pref_channel()
573 			return -1;  in p2p_check_pref_channel()
577 	return 0;  in p2p_check_pref_channel()
588 	os_memset(res, 0, sizeof(*res));  in p2p_pref_channel_filter()
590 	for (i = 0; i < p2p_chan->reg_classes; i++) {  in p2p_pref_channel_filter()
591 		const struct p2p_reg_class *reg = &p2p_chan->reg_class[i];  in p2p_pref_channel_filter()
592 		struct p2p_reg_class *res_reg = &res->reg_class[i];  in p2p_pref_channel_filter()
594 		if (num_channels > 0) {  in p2p_pref_channel_filter()
595 			for (j = 0; j < reg->channels; j++) {  in p2p_pref_channel_filter()
596 				if (p2p_check_pref_channel(reg->channel[j],  in p2p_pref_channel_filter()
597 							   reg->reg_class,  in p2p_pref_channel_filter()
600 							   go) < 0)  in p2p_pref_channel_filter()
603 				res_reg->channel[res_reg->channels++] =  in p2p_pref_channel_filter()
604 					reg->channel[j];  in p2p_pref_channel_filter()
608 		if (res_reg->channels == 0)  in p2p_pref_channel_filter()
610 		res->reg_classes++;  in p2p_pref_channel_filter()
611 		res_reg->reg_class = reg->reg_class;  in p2p_pref_channel_filter()