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)
15static 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
48static 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
86static 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
98static 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
105static 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
111static 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
117static 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
124static 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
151static 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
159static 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
165static 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
172static 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
180static 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
198static 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
216static const struct proc_ops prism2_pda_proc_ops = {
217	.proc_read	= prism2_pda_proc_read,
218	.proc_lseek	= generic_file_llseek,
219};
220
221
222static 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
228static 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
234static 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
272static 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
322static 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
333static 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
343static 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
349static 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
358void 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
403void hostap_remove_proc(local_info_t *local)
404{
405	proc_remove(local->proc);
406}
407
408
409EXPORT_SYMBOL(hostap_init_proc);
410EXPORT_SYMBOL(hostap_remove_proc);
411