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 	__acquires(&local->lock)
153 {
154 	local_info_t *local = PDE_DATA(file_inode(m->file));
155 	spin_lock_bh(&local->lock);
156 	return seq_list_start_head(&local->bss_list, *_pos);
157 }
158 
159 static void *prism2_bss_list_proc_next(struct seq_file *m, void *v, loff_t *_pos)
160 {
161 	local_info_t *local = PDE_DATA(file_inode(m->file));
162 	return seq_list_next(v, &local->bss_list, _pos);
163 }
164 
165 static void prism2_bss_list_proc_stop(struct seq_file *m, void *v)
166 	__releases(&local->lock)
167 {
168 	local_info_t *local = PDE_DATA(file_inode(m->file));
169 	spin_unlock_bh(&local->lock);
170 }
171 
172 static const struct seq_operations prism2_bss_list_proc_seqops = {
173 	.start	= prism2_bss_list_proc_start,
174 	.next	= prism2_bss_list_proc_next,
175 	.stop	= prism2_bss_list_proc_stop,
176 	.show	= prism2_bss_list_proc_show,
177 };
178 
179 #ifdef CONFIG_PROC_FS
180 static int prism2_crypt_proc_show(struct seq_file *m, void *v)
181 {
182 	local_info_t *local = m->private;
183 	int i;
184 
185 	seq_printf(m, "tx_keyidx=%d\n", local->crypt_info.tx_keyidx);
186 	for (i = 0; i < WEP_KEYS; i++) {
187 		if (local->crypt_info.crypt[i] &&
188 		    local->crypt_info.crypt[i]->ops &&
189 		    local->crypt_info.crypt[i]->ops->print_stats) {
190 			local->crypt_info.crypt[i]->ops->print_stats(
191 				m, local->crypt_info.crypt[i]->priv);
192 		}
193 	}
194 	return 0;
195 }
196 #endif
197 
198 static ssize_t prism2_pda_proc_read(struct file *file, char __user *buf,
199 				    size_t count, loff_t *_pos)
200 {
201 	local_info_t *local = PDE_DATA(file_inode(file));
202 	size_t off;
203 
204 	if (local->pda == NULL || *_pos >= PRISM2_PDA_SIZE)
205 		return 0;
206 
207 	off = *_pos;
208 	if (count > PRISM2_PDA_SIZE - off)
209 		count = PRISM2_PDA_SIZE - off;
210 	if (copy_to_user(buf, local->pda + off, count) != 0)
211 		return -EFAULT;
212 	*_pos += count;
213 	return count;
214 }
215 
216 static const struct proc_ops prism2_pda_proc_ops = {
217 	.proc_read	= prism2_pda_proc_read,
218 	.proc_lseek	= generic_file_llseek,
219 };
220 
221 
222 static ssize_t prism2_aux_dump_proc_no_read(struct file *file, char __user *buf,
223 					    size_t bufsize, loff_t *_pos)
224 {
225 	return 0;
226 }
227 
228 static const struct proc_ops prism2_aux_dump_proc_ops = {
229 	.proc_read	= prism2_aux_dump_proc_no_read,
230 };
231 
232 
233 #ifdef PRISM2_IO_DEBUG
234 static int prism2_io_debug_proc_read(char *page, char **start, off_t off,
235 				     int count, int *eof, void *data)
236 {
237 	local_info_t *local = (local_info_t *) data;
238 	int head = local->io_debug_head;
239 	int start_bytes, left, copy;
240 
241 	if (off + count > PRISM2_IO_DEBUG_SIZE * 4) {
242 		*eof = 1;
243 		if (off >= PRISM2_IO_DEBUG_SIZE * 4)
244 			return 0;
245 		count = PRISM2_IO_DEBUG_SIZE * 4 - off;
246 	}
247 
248 	start_bytes = (PRISM2_IO_DEBUG_SIZE - head) * 4;
249 	left = count;
250 
251 	if (off < start_bytes) {
252 		copy = start_bytes - off;
253 		if (copy > count)
254 			copy = count;
255 		memcpy(page, ((u8 *) &local->io_debug[head]) + off, copy);
256 		left -= copy;
257 		if (left > 0)
258 			memcpy(&page[copy], local->io_debug, left);
259 	} else {
260 		memcpy(page, ((u8 *) local->io_debug) + (off - start_bytes),
261 		       left);
262 	}
263 
264 	*start = page;
265 
266 	return count;
267 }
268 #endif /* PRISM2_IO_DEBUG */
269 
270 
271 #ifndef PRISM2_NO_STATION_MODES
272 static int prism2_scan_results_proc_show(struct seq_file *m, void *v)
273 {
274 	local_info_t *local = PDE_DATA(file_inode(m->file));
275 	unsigned long entry;
276 	int i, len;
277 	struct hfa384x_hostscan_result *scanres;
278 	u8 *p;
279 
280 	if (v == SEQ_START_TOKEN) {
281 		seq_printf(m,
282 			   "CHID ANL SL BcnInt Capab Rate BSSID ATIM SupRates SSID\n");
283 		return 0;
284 	}
285 
286 	entry = (unsigned long)v - 2;
287 	scanres = &local->last_scan_results[entry];
288 
289 	seq_printf(m, "%d %d %d %d 0x%02x %d %pM %d ",
290 		   le16_to_cpu(scanres->chid),
291 		   (s16) le16_to_cpu(scanres->anl),
292 		   (s16) le16_to_cpu(scanres->sl),
293 		   le16_to_cpu(scanres->beacon_interval),
294 		   le16_to_cpu(scanres->capability),
295 		   le16_to_cpu(scanres->rate),
296 		   scanres->bssid,
297 		   le16_to_cpu(scanres->atim));
298 
299 	p = scanres->sup_rates;
300 	for (i = 0; i < sizeof(scanres->sup_rates); i++) {
301 		if (p[i] == 0)
302 			break;
303 		seq_printf(m, "<%02x>", p[i]);
304 	}
305 	seq_putc(m, ' ');
306 
307 	p = scanres->ssid;
308 	len = le16_to_cpu(scanres->ssid_len);
309 	if (len > 32)
310 		len = 32;
311 	for (i = 0; i < len; i++) {
312 		unsigned char c = p[i];
313 		if (c >= 32 && c < 127)
314 			seq_putc(m, c);
315 		else
316 			seq_printf(m, "<%02x>", c);
317 	}
318 	seq_putc(m, '\n');
319 	return 0;
320 }
321 
322 static void *prism2_scan_results_proc_start(struct seq_file *m, loff_t *_pos)
323 {
324 	local_info_t *local = PDE_DATA(file_inode(m->file));
325 	spin_lock_bh(&local->lock);
326 
327 	/* We have a header (pos 0) + N results to show (pos 1...N) */
328 	if (*_pos > local->last_scan_results_count)
329 		return NULL;
330 	return (void *)(unsigned long)(*_pos + 1); /* 0 would be EOF */
331 }
332 
333 static void *prism2_scan_results_proc_next(struct seq_file *m, void *v, loff_t *_pos)
334 {
335 	local_info_t *local = PDE_DATA(file_inode(m->file));
336 
337 	++*_pos;
338 	if (*_pos > local->last_scan_results_count)
339 		return NULL;
340 	return (void *)(unsigned long)(*_pos + 1); /* 0 would be EOF */
341 }
342 
343 static void prism2_scan_results_proc_stop(struct seq_file *m, void *v)
344 {
345 	local_info_t *local = PDE_DATA(file_inode(m->file));
346 	spin_unlock_bh(&local->lock);
347 }
348 
349 static const struct seq_operations prism2_scan_results_proc_seqops = {
350 	.start	= prism2_scan_results_proc_start,
351 	.next	= prism2_scan_results_proc_next,
352 	.stop	= prism2_scan_results_proc_stop,
353 	.show	= prism2_scan_results_proc_show,
354 };
355 #endif /* PRISM2_NO_STATION_MODES */
356 
357 
358 void hostap_init_proc(local_info_t *local)
359 {
360 	local->proc = NULL;
361 
362 	if (hostap_proc == NULL) {
363 		printk(KERN_WARNING "%s: hostap proc directory not created\n",
364 		       local->dev->name);
365 		return;
366 	}
367 
368 	local->proc = proc_mkdir(local->ddev->name, hostap_proc);
369 	if (local->proc == NULL) {
370 		printk(KERN_INFO "/proc/net/hostap/%s creation failed\n",
371 		       local->ddev->name);
372 		return;
373 	}
374 
375 #ifndef PRISM2_NO_PROCFS_DEBUG
376 	proc_create_single_data("debug", 0, local->proc,
377 			prism2_debug_proc_show, local);
378 #endif /* PRISM2_NO_PROCFS_DEBUG */
379 	proc_create_single_data("stats", 0, local->proc, prism2_stats_proc_show,
380 			local);
381 	proc_create_seq_data("wds", 0, local->proc,
382 			&prism2_wds_proc_seqops, local);
383 	proc_create_data("pda", 0, local->proc,
384 			 &prism2_pda_proc_ops, local);
385 	proc_create_data("aux_dump", 0, local->proc,
386 			 local->func->read_aux_proc_ops ?: &prism2_aux_dump_proc_ops,
387 			 local);
388 	proc_create_seq_data("bss_list", 0, local->proc,
389 			&prism2_bss_list_proc_seqops, local);
390 	proc_create_single_data("crypt", 0, local->proc, prism2_crypt_proc_show,
391 		local);
392 #ifdef PRISM2_IO_DEBUG
393 	proc_create_single_data("io_debug", 0, local->proc,
394 			prism2_debug_proc_show, local);
395 #endif /* PRISM2_IO_DEBUG */
396 #ifndef PRISM2_NO_STATION_MODES
397 	proc_create_seq_data("scan_results", 0, local->proc,
398 			&prism2_scan_results_proc_seqops, local);
399 #endif /* PRISM2_NO_STATION_MODES */
400 }
401 
402 
403 void hostap_remove_proc(local_info_t *local)
404 {
405 	proc_remove(local->proc);
406 }
407 
408 
409 EXPORT_SYMBOL(hostap_init_proc);
410 EXPORT_SYMBOL(hostap_remove_proc);
411