[mirror_ubuntu-artful-kernel.git] / net / mac80211 / debugfs_key.c

/*
 * Copyright 2003-2005	Devicescape Software, Inc.
 * Copyright (c) 2006	Jiri Benc <jbenc@suse.cz>
 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kobject.h>
#include "ieee80211_i.h"
#include "ieee80211_key.h"
#include "debugfs.h"
#include "debugfs_key.h"

#define KEY_READ(name, buflen, format_string)				\
static ssize_t key_##name##_read(struct file *file,			\
				 char __user *userbuf,			\
				 size_t count, loff_t *ppos)		\
{									\
	char buf[buflen];						\
	struct ieee80211_key *key = file->private_data;			\
	int res = scnprintf(buf, buflen, format_string, key->name);	\
	return simple_read_from_buffer(userbuf, count, ppos, buf, res);	\
}
#define KEY_READ_D(name) KEY_READ(name, 20, "%d\n")

#define KEY_OPS(name)							\
static const struct file_operations key_ ##name## _ops = {		\
	.read = key_##name##_read,					\
	.open = mac80211_open_file_generic,				\
}

#define KEY_FILE(name, format)						\
		 KEY_READ_##format(name)				\
		 KEY_OPS(name)

KEY_FILE(keylen, D);
KEY_FILE(force_sw_encrypt, D);
KEY_FILE(keyidx, D);
KEY_FILE(hw_key_idx, D);
KEY_FILE(tx_rx_count, D);

static ssize_t key_algorithm_read(struct file *file,
				  char __user *userbuf,
				  size_t count, loff_t *ppos)
{
	char *alg;
	struct ieee80211_key *key = file->private_data;

	switch (key->alg) {
	case ALG_WEP:
		alg = "WEP\n";
		break;
	case ALG_TKIP:
		alg = "TKIP\n";
		break;
	case ALG_CCMP:
		alg = "CCMP\n";
		break;
	default:
		return 0;
	}
	return simple_read_from_buffer(userbuf, count, ppos, alg, strlen(alg));
}
KEY_OPS(algorithm);

static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
				size_t count, loff_t *ppos)
{
	const u8 *tpn;
	char buf[20];
	int len;
	struct ieee80211_key *key = file->private_data;

	switch (key->alg) {
	case ALG_WEP:
		len = scnprintf(buf, sizeof(buf), "\n");
		break;
	case ALG_TKIP:
		len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
				key->u.tkip.iv32,
				key->u.tkip.iv16);
		break;
	case ALG_CCMP:
		tpn = key->u.ccmp.tx_pn;
		len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
				tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]);
		break;
	default:
		return 0;
	}
	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
}
KEY_OPS(tx_spec);

static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
				size_t count, loff_t *ppos)
{
	struct ieee80211_key *key = file->private_data;
	char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf;
	int i, len;
	const u8 *rpn;

	switch (key->alg) {
	case ALG_WEP:
		len = scnprintf(buf, sizeof(buf), "\n");
		break;
	case ALG_TKIP:
		for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
			p += scnprintf(p, sizeof(buf)+buf-p,
				       "%08x %04x\n",
				       key->u.tkip.iv32_rx[i],
				       key->u.tkip.iv16_rx[i]);
		len = p - buf;
		break;
	case ALG_CCMP:
		for (i = 0; i < NUM_RX_DATA_QUEUES; i++) {
			rpn = key->u.ccmp.rx_pn[i];
			p += scnprintf(p, sizeof(buf)+buf-p,
				       "%02x%02x%02x%02x%02x%02x\n",
				       rpn[0], rpn[1], rpn[2],
				       rpn[3], rpn[4], rpn[5]);
		}
		len = p - buf;
		break;
	default:
		return 0;
	}
	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
}
KEY_OPS(rx_spec);

static ssize_t key_replays_read(struct file *file, char __user *userbuf,
				size_t count, loff_t *ppos)
{
	struct ieee80211_key *key = file->private_data;
	char buf[20];
	int len;

	if (key->alg != ALG_CCMP)
		return 0;
	len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
}
KEY_OPS(replays);

static ssize_t key_key_read(struct file *file, char __user *userbuf,
			    size_t count, loff_t *ppos)
{
	struct ieee80211_key *key = file->private_data;
	int i, res, bufsize = 2*key->keylen+2;
	char *buf = kmalloc(bufsize, GFP_KERNEL);
	char *p = buf;

	for (i = 0; i < key->keylen; i++)
		p += scnprintf(p, bufsize+buf-p, "%02x", key->key[i]);
	p += scnprintf(p, bufsize+buf-p, "\n");
	res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	kfree(buf);
	return res;
}
KEY_OPS(key);

#define DEBUGFS_ADD(name) \
	key->debugfs.name = debugfs_create_file(#name, 0400,\
				key->debugfs.dir, key, &key_##name##_ops);

void ieee80211_debugfs_key_add(struct ieee80211_local *local,
			       struct ieee80211_key *key)
{
	static int keycount;
	char buf[20];

	if (!local->debugfs.keys)
		return;

	sprintf(buf, "%d", keycount);
	keycount++;
	key->debugfs.dir = debugfs_create_dir(buf,
					local->debugfs.keys);

	if (!key->debugfs.dir)
		return;

	DEBUGFS_ADD(keylen);
	DEBUGFS_ADD(force_sw_encrypt);
	DEBUGFS_ADD(keyidx);
	DEBUGFS_ADD(hw_key_idx);
	DEBUGFS_ADD(tx_rx_count);
	DEBUGFS_ADD(algorithm);
	DEBUGFS_ADD(tx_spec);
	DEBUGFS_ADD(rx_spec);
	DEBUGFS_ADD(replays);
	DEBUGFS_ADD(key);
};

#define DEBUGFS_DEL(name) \
	debugfs_remove(key->debugfs.name); key->debugfs.name = NULL;

void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
{
	if (!key)
		return;

	DEBUGFS_DEL(keylen);
	DEBUGFS_DEL(force_sw_encrypt);
	DEBUGFS_DEL(keyidx);
	DEBUGFS_DEL(hw_key_idx);
	DEBUGFS_DEL(tx_rx_count);
	DEBUGFS_DEL(algorithm);
	DEBUGFS_DEL(tx_spec);
	DEBUGFS_DEL(rx_spec);
	DEBUGFS_DEL(replays);
	DEBUGFS_DEL(key);

	debugfs_remove(key->debugfs.stalink);
	key->debugfs.stalink = NULL;
	debugfs_remove(key->debugfs.dir);
	key->debugfs.dir = NULL;
}
void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata)
{
	char buf[50];

	if (!sdata->debugfsdir)
		return;

	sprintf(buf, "../keys/%d", sdata->default_key->keyidx);
	sdata->debugfs.default_key =
		debugfs_create_symlink("default_key", sdata->debugfsdir, buf);
}
void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
{
	if (!sdata)
		return;

	debugfs_remove(sdata->debugfs.default_key);
	sdata->debugfs.default_key = NULL;
}
void ieee80211_debugfs_key_sta_link(struct ieee80211_key *key,
				    struct sta_info *sta)
{
	char buf[50];

	if (!key->debugfs.dir)
		return;

	sprintf(buf, "../../stations/" MAC_FMT, MAC_ARG(sta->addr));
	key->debugfs.stalink =
		debugfs_create_symlink("station", key->debugfs.dir, buf);
}

void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
				   struct sta_info *sta)
{
	debugfs_remove(key->debugfs.stalink);
	key->debugfs.stalink = NULL;
}
Commit	Line	Data
e9f207f0 JB	1	/*
	2	* Copyright 2003-2005 Devicescape Software, Inc.
	3	* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
	4	* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
	11	#include <linux/kobject.h>
	12	#include "ieee80211_i.h"
	13	#include "ieee80211_key.h"
	14	#include "debugfs.h"
	15	#include "debugfs_key.h"
	16
	17	#define KEY_READ(name, buflen, format_string) \
	18	static ssize_t key_##name##_read(struct file *file, \
	19	char __user *userbuf, \
	20	size_t count, loff_t *ppos) \
	21	{ \
	22	char buf[buflen]; \
	23	struct ieee80211_key *key = file->private_data; \
	24	int res = scnprintf(buf, buflen, format_string, key->name); \
	25	return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
	26	}
	27	#define KEY_READ_D(name) KEY_READ(name, 20, "%d\n")
	28
	29	#define KEY_OPS(name) \
	30	static const struct file_operations key_ ##name## _ops = { \
	31	.read = key_##name##_read, \
	32	.open = mac80211_open_file_generic, \
	33	}
	34
	35	#define KEY_FILE(name, format) \
	36	KEY_READ_##format(name) \
	37	KEY_OPS(name)
	38
	39	KEY_FILE(keylen, D);
	40	KEY_FILE(force_sw_encrypt, D);
	41	KEY_FILE(keyidx, D);
	42	KEY_FILE(hw_key_idx, D);
	43	KEY_FILE(tx_rx_count, D);
	44
	45	static ssize_t key_algorithm_read(struct file *file,
	46	char __user *userbuf,
	47	size_t count, loff_t *ppos)
	48	{
	49	char *alg;
	50	struct ieee80211_key *key = file->private_data;
	51
	52	switch (key->alg) {
	53	case ALG_WEP:
	54	alg = "WEP\n";
	55	break;
	56	case ALG_TKIP:
	57	alg = "TKIP\n";
	58	break;
	59	case ALG_CCMP:
	60	alg = "CCMP\n";
	61	break;
	62	default:
	63	return 0;
	64	}
65	return simple_read_from_buffer(userbuf, count, ppos, alg, strlen(alg));
66	}
67	KEY_OPS(algorithm);
68
69	static ssize_t key_tx_spec_read(struct file file, char __user userbuf,
70	size_t count, loff_t *ppos)
71	{
72	const u8 *tpn;
73	char buf[20];
74	int len;
75	struct ieee80211_key *key = file->private_data;
76
77	switch (key->alg) {
78	case ALG_WEP:
79	len = scnprintf(buf, sizeof(buf), "\n");
50339a67	80	break;
e9f207f0 JB	81	case ALG_TKIP:
	82	len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
	83	key->u.tkip.iv32,
	84	key->u.tkip.iv16);
50339a67	85	break;
e9f207f0 JB	86	case ALG_CCMP:
	87	tpn = key->u.ccmp.tx_pn;
	88	len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
	89	tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]);
50339a67	90	break;
e9f207f0 JB	91	default:
	92	return 0;
	93	}
	94	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
	95	}
	96	KEY_OPS(tx_spec);
	97
	98	static ssize_t key_rx_spec_read(struct file file, char __user userbuf,
	99	size_t count, loff_t *ppos)
	100	{
	101	struct ieee80211_key *key = file->private_data;
	102	char buf[14NUM_RX_DATA_QUEUES+1], p = buf;
	103	int i, len;
	104	const u8 *rpn;
	105
	106	switch (key->alg) {
	107	case ALG_WEP:
	108	len = scnprintf(buf, sizeof(buf), "\n");
50339a67	109	break;
e9f207f0 JB	110	case ALG_TKIP:
	111	for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
	112	p += scnprintf(p, sizeof(buf)+buf-p,
	113	"%08x %04x\n",
	114	key->u.tkip.iv32_rx[i],
	115	key->u.tkip.iv16_rx[i]);
	116	len = p - buf;
50339a67	117	break;
e9f207f0 JB	118	case ALG_CCMP:
	119	for (i = 0; i < NUM_RX_DATA_QUEUES; i++) {
	120	rpn = key->u.ccmp.rx_pn[i];
	121	p += scnprintf(p, sizeof(buf)+buf-p,
	122	"%02x%02x%02x%02x%02x%02x\n",
	123	rpn[0], rpn[1], rpn[2],
	124	rpn[3], rpn[4], rpn[5]);
	125	}
	126	len = p - buf;
50339a67	127	break;
e9f207f0 JB	128	default:
	129	return 0;
	130	}
	131	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
	132	}
	133	KEY_OPS(rx_spec);
	134
	135	static ssize_t key_replays_read(struct file file, char __user userbuf,
	136	size_t count, loff_t *ppos)
	137	{
	138	struct ieee80211_key *key = file->private_data;
	139	char buf[20];
	140	int len;
	141
	142	if (key->alg != ALG_CCMP)
	143	return 0;
	144	len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
	145	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
	146	}
	147	KEY_OPS(replays);
	148
	149	static ssize_t key_key_read(struct file file, char __user userbuf,
	150	size_t count, loff_t *ppos)
	151	{
	152	struct ieee80211_key *key = file->private_data;
	153	int i, res, bufsize = 2*key->keylen+2;
	154	char *buf = kmalloc(bufsize, GFP_KERNEL);
	155	char *p = buf;
	156
	157	for (i = 0; i < key->keylen; i++)
	158	p += scnprintf(p, bufsize+buf-p, "%02x", key->key[i]);
	159	p += scnprintf(p, bufsize+buf-p, "\n");
	160	res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	161	kfree(buf);
	162	return res;
	163	}
	164	KEY_OPS(key);
	165
	166	#define DEBUGFS_ADD(name) \
	167	key->debugfs.name = debugfs_create_file(#name, 0400,\
	168	key->debugfs.dir, key, &key_##name##_ops);
	169
	170	void ieee80211_debugfs_key_add(struct ieee80211_local *local,
	171	struct ieee80211_key *key)
	172	{
50339a67	173	static int keycount;
e9f207f0 JB	174	char buf[20];
	175
	176	if (!local->debugfs.keys)
	177	return;
	178
50339a67 JB	179	sprintf(buf, "%d", keycount);
50339a67 JB	180	keycount++;
e9f207f0 JB	181	key->debugfs.dir = debugfs_create_dir(buf,
	182	local->debugfs.keys);
	183
	184	if (!key->debugfs.dir)
	185	return;
	186
	187	DEBUGFS_ADD(keylen);
	188	DEBUGFS_ADD(force_sw_encrypt);
	189	DEBUGFS_ADD(keyidx);
	190	DEBUGFS_ADD(hw_key_idx);
	191	DEBUGFS_ADD(tx_rx_count);
	192	DEBUGFS_ADD(algorithm);
	193	DEBUGFS_ADD(tx_spec);
	194	DEBUGFS_ADD(rx_spec);
	195	DEBUGFS_ADD(replays);
	196	DEBUGFS_ADD(key);
	197	};
	198
	199	#define DEBUGFS_DEL(name) \
	200	debugfs_remove(key->debugfs.name); key->debugfs.name = NULL;
	201
	202	void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
	203	{
	204	if (!key)
	205	return;
	206
	207	DEBUGFS_DEL(keylen);
	208	DEBUGFS_DEL(force_sw_encrypt);
	209	DEBUGFS_DEL(keyidx);
	210	DEBUGFS_DEL(hw_key_idx);
	211	DEBUGFS_DEL(tx_rx_count);
	212	DEBUGFS_DEL(algorithm);
	213	DEBUGFS_DEL(tx_spec);
	214	DEBUGFS_DEL(rx_spec);
	215	DEBUGFS_DEL(replays);
	216	DEBUGFS_DEL(key);
	217
	218	debugfs_remove(key->debugfs.stalink);
	219	key->debugfs.stalink = NULL;
	220	debugfs_remove(key->debugfs.dir);
	221	key->debugfs.dir = NULL;
	222	}
	223	void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata)
	224	{
	225	char buf[50];
	226
	227	if (!sdata->debugfsdir)
	228	return;
	229
	230	sprintf(buf, "../keys/%d", sdata->default_key->keyidx);
	231	sdata->debugfs.default_key =
	232	debugfs_create_symlink("default_key", sdata->debugfsdir, buf);
	233	}
	234	void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
	235	{
	236	if (!sdata)
	237	return;
	238
	239	debugfs_remove(sdata->debugfs.default_key);
	240	sdata->debugfs.default_key = NULL;
	241	}
	242	void ieee80211_debugfs_key_sta_link(struct ieee80211_key *key,
	243	struct sta_info *sta)
	244	{
245	char buf[50];
246
247	if (!key->debugfs.dir)
248	return;
249
50339a67	250	sprintf(buf, "../../stations/" MAC_FMT, MAC_ARG(sta->addr));
e9f207f0 JB	251	key->debugfs.stalink =
	252	debugfs_create_symlink("station", key->debugfs.dir, buf);
	253	}
	254
	255	void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
	256	struct sta_info *sta)
	257	{
	258	debugfs_remove(key->debugfs.stalink);
	259	key->debugfs.stalink = NULL;
	260	}