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;
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 	start_bytes = (PRISM2_IO_DEBUG_SIZE - head) * 4;
247 	left = count;
248 
249 	if (off < start_bytes) {
250 		copy = start_bytes - off;
251 		if (copy > count)
252 			copy = count;
253 		memcpy(page, ((u8 *) &local->io_debug[head]) + off, copy);
254 		left -= copy;
255 		if (left > 0)
256 			memcpy(&page[copy], local->io_debug, left);
257 	} else {
258 		memcpy(page, ((u8 *) local->io_debug) + (off - start_bytes),
259 		       left);
260 	}
261 
262 	*start = page;
263 
264 	return count;
265 }
266 #endif /* PRISM2_IO_DEBUG */
267 
268 
269 #ifndef PRISM2_NO_STATION_MODES
270 static int prism2_scan_results_proc_show(struct seq_file *m, void *v)
271 {
272 	local_info_t *local = PDE_DATA(file_inode(m->file));
273 	unsigned long entry;
274 	int i, len;
275 	struct hfa384x_hostscan_result *scanres;
276 	u8 *p;
277 
278 	if (v == SEQ_START_TOKEN) {
279 		seq_printf(m,
280 			   "CHID ANL SL BcnInt Capab Rate BSSID ATIM SupRates SSID\n");
281 		return 0;
282 	}
283 
284 	entry = (unsigned long)v - 2;
285 	scanres = &local->last_scan_results[entry];
286 
287 	seq_printf(m, "%d %d %d %d 0x%02x %d %pM %d ",
288 		   le16_to_cpu(scanres->chid),
289 		   (s16) le16_to_cpu(scanres->anl),
290 		   (s16) le16_to_cpu(scanres->sl),
291 		   le16_to_cpu(scanres->beacon_interval),
292 		   le16_to_cpu(scanres->capability),
293 		   le16_to_cpu(scanres->rate),
294 		   scanres->bssid,
295 		   le16_to_cpu(scanres->atim));
296 
297 	p = scanres->sup_rates;
298 	for (i = 0; i < sizeof(scanres->sup_rates); i++) {
299 		if (p[i] == 0)
300 			break;
301 		seq_printf(m, "<%02x>", p[i]);
302 	}
303 	seq_putc(m, ' ');
304 
305 	p = scanres->ssid;
306 	len = le16_to_cpu(scanres->ssid_len);
307 	if (len > 32)
308 		len = 32;
309 	for (i = 0; i < len; i++) {
310 		unsigned char c = p[i];
311 		if (c >= 32 && c < 127)
312 			seq_putc(m, c);
313 		else
314 			seq_printf(m, "<%02x>", c);
315 	}
316 	seq_putc(m, '\n');
317 	return 0;
318 }
319 
320 static void *prism2_scan_results_proc_start(struct seq_file *m, loff_t *_pos)
321 {
322 	local_info_t *local = PDE_DATA(file_inode(m->file));
323 	spin_lock_bh(&local->lock);
324 
325 	/* We have a header (pos 0) + N results to show (pos 1...N) */
326 	if (*_pos > local->last_scan_results_count)
327 		return NULL;
328 	return (void *)(unsigned long)(*_pos + 1); /* 0 would be EOF */
329 }
330 
331 static void *prism2_scan_results_proc_next(struct seq_file *m, void *v, loff_t *_pos)
332 {
333 	local_info_t *local = PDE_DATA(file_inode(m->file));
334 
335 	++*_pos;
336 	if (*_pos > local->last_scan_results_count)
337 		return NULL;
338 	return (void *)(unsigned long)(*_pos + 1); /* 0 would be EOF */
339 }
340 
341 static void prism2_scan_results_proc_stop(struct seq_file *m, void *v)
342 {
343 	local_info_t *local = PDE_DATA(file_inode(m->file));
344 	spin_unlock_bh(&local->lock);
345 }
346 
347 static const struct seq_operations prism2_scan_results_proc_seqops = {
348 	.start	= prism2_scan_results_proc_start,
349 	.next	= prism2_scan_results_proc_next,
350 	.stop	= prism2_scan_results_proc_stop,
351 	.show	= prism2_scan_results_proc_show,
352 };
353 #endif /* PRISM2_NO_STATION_MODES */
354 
355 
356 void hostap_init_proc(local_info_t *local)
357 {
358 	local->proc = NULL;
359 
360 	if (hostap_proc == NULL) {
361 		printk(KERN_WARNING "%s: hostap proc directory not created\n",
362 		       local->dev->name);
363 		return;
364 	}
365 
366 	local->proc = proc_mkdir(local->ddev->name, hostap_proc);
367 	if (local->proc == NULL) {
368 		printk(KERN_INFO "/proc/net/hostap/%s creation failed\n",
369 		       local->ddev->name);
370 		return;
371 	}
372 
373 #ifndef PRISM2_NO_PROCFS_DEBUG
374 	proc_create_single_data("debug", 0, local->proc,
375 			prism2_debug_proc_show, local);
376 #endif /* PRISM2_NO_PROCFS_DEBUG */
377 	proc_create_single_data("stats", 0, local->proc, prism2_stats_proc_show,
378 			local);
379 	proc_create_seq_data("wds", 0, local->proc,
380 			&prism2_wds_proc_seqops, local);
381 	proc_create_data("pda", 0, local->proc,
382 			 &prism2_pda_proc_fops, local);
383 	proc_create_data("aux_dump", 0, local->proc,
384 			 local->func->read_aux_fops ?: &prism2_aux_dump_proc_fops,
385 			 local);
386 	proc_create_seq_data("bss_list", 0, local->proc,
387 			&prism2_bss_list_proc_seqops, local);
388 	proc_create_single_data("crypt", 0, local->proc, prism2_crypt_proc_show,
389 		local);
390 #ifdef PRISM2_IO_DEBUG
391 	proc_create_single_data("io_debug", 0, local->proc,
392 			prism2_debug_proc_show, local);
393 #endif /* PRISM2_IO_DEBUG */
394 #ifndef PRISM2_NO_STATION_MODES
395 	proc_create_seq_data("scan_results", 0, local->proc,
396 			&prism2_scan_results_proc_seqops, local);
397 #endif /* PRISM2_NO_STATION_MODES */
398 }
399 
400 
401 void hostap_remove_proc(local_info_t *local)
402 {
403 	proc_remove(local->proc);
404 }
405 
406 
407 EXPORT_SYMBOL(hostap_init_proc);
408 EXPORT_SYMBOL(hostap_remove_proc);
409