1 // SPDX-License-Identifier: GPL-2.0
2 /* /proc routines for Host AP driver */
3 
4 #include <linux/types.h>
5 #include <linux/proc_fs.h>
6 #include <linux/export.h>
7 #include <net/lib80211.h>
8 
9 #include "hostap_wlan.h"
10 #include "hostap.h"
11 
12 #define PROC_LIMIT (PAGE_SIZE - 80)
13 
14 #if !defined(PRISM2_NO_PROCFS_DEBUG) && defined(CONFIG_PROC_FS)
15 static int prism2_debug_proc_show(struct seq_file *m, void *v)
16 {
17 	local_info_t *local = m->private;
18 	int i;
19 
20 	seq_printf(m, "next_txfid=%d next_alloc=%d\n",
21 		   local->next_txfid, local->next_alloc);
22 	for (i = 0; i < PRISM2_TXFID_COUNT; i++)
23 		seq_printf(m, "FID: tx=%04X intransmit=%04X\n",
24 			   local->txfid[i], local->intransmitfid[i]);
25 	seq_printf(m, "FW TX rate control: %d\n", local->fw_tx_rate_control);
26 	seq_printf(m, "beacon_int=%d\n", local->beacon_int);
27 	seq_printf(m, "dtim_period=%d\n", local->dtim_period);
28 	seq_printf(m, "wds_max_connections=%d\n", local->wds_max_connections);
29 	seq_printf(m, "dev_enabled=%d\n", local->dev_enabled);
30 	seq_printf(m, "sw_tick_stuck=%d\n", local->sw_tick_stuck);
31 	for (i = 0; i < WEP_KEYS; i++) {
32 		if (local->crypt_info.crypt[i] &&
33 		    local->crypt_info.crypt[i]->ops) {
34 			seq_printf(m, "crypt[%d]=%s\n", i,
35 				   local->crypt_info.crypt[i]->ops->name);
36 		}
37 	}
38 	seq_printf(m, "pri_only=%d\n", local->pri_only);
39 	seq_printf(m, "pci=%d\n", local->func->hw_type == HOSTAP_HW_PCI);
40 	seq_printf(m, "sram_type=%d\n", local->sram_type);
41 	seq_printf(m, "no_pri=%d\n", local->no_pri);
42 
43 	return 0;
44 }
45 #endif
46 
47 #ifdef CONFIG_PROC_FS
48 static int prism2_stats_proc_show(struct seq_file *m, void *v)
49 {
50 	local_info_t *local = m->private;
51 	struct comm_tallies_sums *sums = &local->comm_tallies;
52 
53 	seq_printf(m, "TxUnicastFrames=%u\n", sums->tx_unicast_frames);
54 	seq_printf(m, "TxMulticastframes=%u\n", sums->tx_multicast_frames);
55 	seq_printf(m, "TxFragments=%u\n", sums->tx_fragments);
56 	seq_printf(m, "TxUnicastOctets=%u\n", sums->tx_unicast_octets);
57 	seq_printf(m, "TxMulticastOctets=%u\n", sums->tx_multicast_octets);
58 	seq_printf(m, "TxDeferredTransmissions=%u\n",
59 		   sums->tx_deferred_transmissions);
60 	seq_printf(m, "TxSingleRetryFrames=%u\n", sums->tx_single_retry_frames);
61 	seq_printf(m, "TxMultipleRetryFrames=%u\n",
62 		   sums->tx_multiple_retry_frames);
63 	seq_printf(m, "TxRetryLimitExceeded=%u\n",
64 		   sums->tx_retry_limit_exceeded);
65 	seq_printf(m, "TxDiscards=%u\n", sums->tx_discards);
66 	seq_printf(m, "RxUnicastFrames=%u\n", sums->rx_unicast_frames);
67 	seq_printf(m, "RxMulticastFrames=%u\n", sums->rx_multicast_frames);
68 	seq_printf(m, "RxFragments=%u\n", sums->rx_fragments);
69 	seq_printf(m, "RxUnicastOctets=%u\n", sums->rx_unicast_octets);
70 	seq_printf(m, "RxMulticastOctets=%u\n", sums->rx_multicast_octets);
71 	seq_printf(m, "RxFCSErrors=%u\n", sums->rx_fcs_errors);
72 	seq_printf(m, "RxDiscardsNoBuffer=%u\n", sums->rx_discards_no_buffer);
73 	seq_printf(m, "TxDiscardsWrongSA=%u\n", sums->tx_discards_wrong_sa);
74 	seq_printf(m, "RxDiscardsWEPUndecryptable=%u\n",
75 		   sums->rx_discards_wep_undecryptable);
76 	seq_printf(m, "RxMessageInMsgFragments=%u\n",
77 		   sums->rx_message_in_msg_fragments);
78 	seq_printf(m, "RxMessageInBadMsgFragments=%u\n",
79 		   sums->rx_message_in_bad_msg_fragments);
80 	/* FIX: this may grow too long for one page(?) */
81 
82 	return 0;
83 }
84 #endif
85 
86 static int prism2_wds_proc_show(struct seq_file *m, void *v)
87 {
88 	struct list_head *ptr = v;
89 	struct hostap_interface *iface;
90 
91 	iface = list_entry(ptr, struct hostap_interface, list);
92 	if (iface->type == HOSTAP_INTERFACE_WDS)
93 		seq_printf(m, "%s\t%pM\n",
94 			   iface->dev->name, iface->u.wds.remote_addr);
95 	return 0;
96 }
97 
98 static void *prism2_wds_proc_start(struct seq_file *m, loff_t *_pos)
99 {
100 	local_info_t *local = PDE_DATA(file_inode(m->file));
101 	read_lock_bh(&local->iface_lock);
102 	return seq_list_start(&local->hostap_interfaces, *_pos);
103 }
104 
105 static void *prism2_wds_proc_next(struct seq_file *m, void *v, loff_t *_pos)
106 {
107 	local_info_t *local = PDE_DATA(file_inode(m->file));
108 	return seq_list_next(v, &local->hostap_interfaces, _pos);
109 }
110 
111 static void prism2_wds_proc_stop(struct seq_file *m, void *v)
112 {
113 	local_info_t *local = PDE_DATA(file_inode(m->file));
114 	read_unlock_bh(&local->iface_lock);
115 }
116 
117 static const struct seq_operations prism2_wds_proc_seqops = {
118 	.start	= prism2_wds_proc_start,
119 	.next	= prism2_wds_proc_next,
120 	.stop	= prism2_wds_proc_stop,
121 	.show	= prism2_wds_proc_show,
122 };
123 
124 static int prism2_bss_list_proc_show(struct seq_file *m, void *v)
125 {
126 	local_info_t *local = PDE_DATA(file_inode(m->file));
127 	struct list_head *ptr = v;
128 	struct hostap_bss_info *bss;
129 
130 	if (ptr == &local->bss_list) {
131 		seq_printf(m, "#BSSID\tlast_update\tcount\tcapab_info\tSSID(txt)\t"
132 			   "SSID(hex)\tWPA IE\n");
133 		return 0;
134 	}
135 
136 	bss = list_entry(ptr, struct hostap_bss_info, list);
137 	seq_printf(m, "%pM\t%lu\t%u\t0x%x\t",
138 		   bss->bssid, bss->last_update,
139 		   bss->count, bss->capab_info);
140 
141 	seq_printf(m, "%*pE", (int)bss->ssid_len, bss->ssid);
142 
143 	seq_putc(m, '\t');
144 	seq_printf(m, "%*phN", (int)bss->ssid_len, bss->ssid);
145 	seq_putc(m, '\t');
146 	seq_printf(m, "%*phN", (int)bss->wpa_ie_len, bss->wpa_ie);
147 	seq_putc(m, '\n');
148 	return 0;
149 }
150 
151 static void *prism2_bss_list_proc_start(struct seq_file *m, loff_t *_pos)
152 {
153 	local_info_t *local = PDE_DATA(file_inode(m->file));
154 	spin_lock_bh(&local->lock);
155 	return seq_list_start_head(&local->bss_list, *_pos);
156 }
157 
158 static void *prism2_bss_list_proc_next(struct seq_file *m, void *v, loff_t *_pos)
159 {
160 	local_info_t *local = PDE_DATA(file_inode(m->file));
161 	return seq_list_next(v, &local->bss_list, _pos);
162 }
163 
164 static void prism2_bss_list_proc_stop(struct seq_file *m, void *v)
165 {
166 	local_info_t *local = PDE_DATA(file_inode(m->file));
167 	spin_unlock_bh(&local->lock);
168 }
169 
170 static const struct seq_operations prism2_bss_list_proc_seqops = {
171 	.start	= prism2_bss_list_proc_start,
172 	.next	= prism2_bss_list_proc_next,
173 	.stop	= prism2_bss_list_proc_stop,
174 	.show	= prism2_bss_list_proc_show,
175 };
176 
177 #ifdef CONFIG_PROC_FS
178 static int prism2_crypt_proc_show(struct seq_file *m, void *v)
179 {
180 	local_info_t *local = m->private;
181 	int i;
182 
183 	seq_printf(m, "tx_keyidx=%d\n", local->crypt_info.tx_keyidx);
184 	for (i = 0; i < WEP_KEYS; i++) {
185 		if (local->crypt_info.crypt[i] &&
186 		    local->crypt_info.crypt[i]->ops &&
187 		    local->crypt_info.crypt[i]->ops->print_stats) {
188 			local->crypt_info.crypt[i]->ops->print_stats(
189 				m, local->crypt_info.crypt[i]->priv);
190 		}
191 	}
192 	return 0;
193 }
194 #endif
195 
196 static ssize_t prism2_pda_proc_read(struct file *file, char __user *buf,
197 				    size_t count, loff_t *_pos)
198 {
199 	local_info_t *local = PDE_DATA(file_inode(file));
200 	size_t off;
201 
202 	if (local->pda == NULL || *_pos >= PRISM2_PDA_SIZE)
203 		return 0;
204 
205 	off = *_pos;
206 	if (count > PRISM2_PDA_SIZE - off)
207 		count = PRISM2_PDA_SIZE - off;
208 	if (copy_to_user(buf, local->pda + off, count) != 0)
209 		return -EFAULT;
210 	*_pos += count;
211 	return count;
212 }
213 
214 static const struct file_operations prism2_pda_proc_fops = {
215 	.read		= prism2_pda_proc_read,
216 	.llseek		= generic_file_llseek,
217 };
218 
219 
220 static ssize_t prism2_aux_dump_proc_no_read(struct file *file, char __user *buf,
221 					    size_t bufsize, loff_t *_pos)
222 {
223 	return 0;
224 }
225 
226 static const struct file_operations prism2_aux_dump_proc_fops = {
227 	.read		= prism2_aux_dump_proc_no_read,
228 };
229 
230 
231 #ifdef PRISM2_IO_DEBUG
232 static int prism2_io_debug_proc_read(char *page, char **start, off_t off,
233 				     int count, int *eof, void *data)
234 {
235 	local_info_t *local = (local_info_t *) data;
236 	int head = local->io_debug_head;
237 	int start_bytes, left, copy, copied;
238 
239 	if (off + count > PRISM2_IO_DEBUG_SIZE * 4) {
240 		*eof = 1;
241 		if (off >= PRISM2_IO_DEBUG_SIZE * 4)
242 			return 0;
243 		count = PRISM2_IO_DEBUG_SIZE * 4 - off;
244 	}
245 
246 	copied = 0;
247 	start_bytes = (PRISM2_IO_DEBUG_SIZE - head) * 4;
248 	left = count;
249 
250 	if (off < start_bytes) {
251 		copy = start_bytes - off;
252 		if (copy > count)
253 			copy = count;
254 		memcpy(page, ((u8 *) &local->io_debug[head]) + off, copy);
255 		left -= copy;
256 		if (left > 0)
257 			memcpy(&page[copy], local->io_debug, left);
258 	} else {
259 		memcpy(page, ((u8 *) local->io_debug) + (off - start_bytes),
260 		       left);
261 	}
262 
263 	*start = page;
264 
265 	return count;
266 }
267 #endif /* PRISM2_IO_DEBUG */
268 
269 
270 #ifndef PRISM2_NO_STATION_MODES
271 static int prism2_scan_results_proc_show(struct seq_file *m, void *v)
272 {
273 	local_info_t *local = PDE_DATA(file_inode(m->file));
274 	unsigned long entry;
275 	int i, len;
276 	struct hfa384x_hostscan_result *scanres;
277 	u8 *p;
278 
279 	if (v == SEQ_START_TOKEN) {
280 		seq_printf(m,
281 			   "CHID ANL SL BcnInt Capab Rate BSSID ATIM SupRates SSID\n");
282 		return 0;
283 	}
284 
285 	entry = (unsigned long)v - 2;
286 	scanres = &local->last_scan_results[entry];
287 
288 	seq_printf(m, "%d %d %d %d 0x%02x %d %pM %d ",
289 		   le16_to_cpu(scanres->chid),
290 		   (s16) le16_to_cpu(scanres->anl),
291 		   (s16) le16_to_cpu(scanres->sl),
292 		   le16_to_cpu(scanres->beacon_interval),
293 		   le16_to_cpu(scanres->capability),
294 		   le16_to_cpu(scanres->rate),
295 		   scanres->bssid,
296 		   le16_to_cpu(scanres->atim));
297 
298 	p = scanres->sup_rates;
299 	for (i = 0; i < sizeof(scanres->sup_rates); i++) {
300 		if (p[i] == 0)
301 			break;
302 		seq_printf(m, "<%02x>", p[i]);
303 	}
304 	seq_putc(m, ' ');
305 
306 	p = scanres->ssid;
307 	len = le16_to_cpu(scanres->ssid_len);
308 	if (len > 32)
309 		len = 32;
310 	for (i = 0; i < len; i++) {
311 		unsigned char c = p[i];
312 		if (c >= 32 && c < 127)
313 			seq_putc(m, c);
314 		else
315 			seq_printf(m, "<%02x>", c);
316 	}
317 	seq_putc(m, '\n');
318 	return 0;
319 }
320 
321 static void *prism2_scan_results_proc_start(struct seq_file *m, loff_t *_pos)
322 {
323 	local_info_t *local = PDE_DATA(file_inode(m->file));
324 	spin_lock_bh(&local->lock);
325 
326 	/* We have a header (pos 0) + N results to show (pos 1...N) */
327 	if (*_pos > local->last_scan_results_count)
328 		return NULL;
329 	return (void *)(unsigned long)(*_pos + 1); /* 0 would be EOF */
330 }
331 
332 static void *prism2_scan_results_proc_next(struct seq_file *m, void *v, loff_t *_pos)
333 {
334 	local_info_t *local = PDE_DATA(file_inode(m->file));
335 
336 	++*_pos;
337 	if (*_pos > local->last_scan_results_count)
338 		return NULL;
339 	return (void *)(unsigned long)(*_pos + 1); /* 0 would be EOF */
340 }
341 
342 static void prism2_scan_results_proc_stop(struct seq_file *m, void *v)
343 {
344 	local_info_t *local = PDE_DATA(file_inode(m->file));
345 	spin_unlock_bh(&local->lock);
346 }
347 
348 static const struct seq_operations prism2_scan_results_proc_seqops = {
349 	.start	= prism2_scan_results_proc_start,
350 	.next	= prism2_scan_results_proc_next,
351 	.stop	= prism2_scan_results_proc_stop,
352 	.show	= prism2_scan_results_proc_show,
353 };
354 #endif /* PRISM2_NO_STATION_MODES */
355 
356 
357 void hostap_init_proc(local_info_t *local)
358 {
359 	local->proc = NULL;
360 
361 	if (hostap_proc == NULL) {
362 		printk(KERN_WARNING "%s: hostap proc directory not created\n",
363 		       local->dev->name);
364 		return;
365 	}
366 
367 	local->proc = proc_mkdir(local->ddev->name, hostap_proc);
368 	if (local->proc == NULL) {
369 		printk(KERN_INFO "/proc/net/hostap/%s creation failed\n",
370 		       local->ddev->name);
371 		return;
372 	}
373 
374 #ifndef PRISM2_NO_PROCFS_DEBUG
375 	proc_create_single_data("debug", 0, local->proc,
376 			prism2_debug_proc_show, local);
377 #endif /* PRISM2_NO_PROCFS_DEBUG */
378 	proc_create_single_data("stats", 0, local->proc, prism2_stats_proc_show,
379 			local);
380 	proc_create_seq_data("wds", 0, local->proc,
381 			&prism2_wds_proc_seqops, local);
382 	proc_create_data("pda", 0, local->proc,
383 			 &prism2_pda_proc_fops, local);
384 	proc_create_data("aux_dump", 0, local->proc,
385 			 local->func->read_aux_fops ?: &prism2_aux_dump_proc_fops,
386 			 local);
387 	proc_create_seq_data("bss_list", 0, local->proc,
388 			&prism2_bss_list_proc_seqops, local);
389 	proc_create_single_data("crypt", 0, local->proc, prism2_crypt_proc_show,
390 		local);
391 #ifdef PRISM2_IO_DEBUG
392 	proc_create_single_data("io_debug", 0, local->proc,
393 			prism2_debug_proc_show, local);
394 #endif /* PRISM2_IO_DEBUG */
395 #ifndef PRISM2_NO_STATION_MODES
396 	proc_create_seq_data("scan_results", 0, local->proc,
397 			&prism2_scan_results_proc_seqops, local);
398 #endif /* PRISM2_NO_STATION_MODES */
399 }
400 
401 
402 void hostap_remove_proc(local_info_t *local)
403 {
404 	proc_remove(local->proc);
405 }
406 
407 
408 EXPORT_SYMBOL(hostap_init_proc);
409 EXPORT_SYMBOL(hostap_remove_proc);
410