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* Copyright 2003-2005 Devicescape Software, Inc.
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* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
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* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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#include <linux/kobject.h>
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#include "ieee80211_i.h"
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#include "ieee80211_key.h"
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#include "debugfs_key.h"
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#define KEY_READ(name, buflen, format_string) \
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static ssize_t key_##name##_read(struct file *file, \
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char __user *userbuf, \
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size_t count, loff_t *ppos) \
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struct ieee80211_key *key = file->private_data; \
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int res = scnprintf(buf, buflen, format_string, key->name); \
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return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
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#define KEY_READ_D(name) KEY_READ(name, 20, "%d\n")
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#define KEY_OPS(name) \
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static const struct file_operations key_ ##name## _ops = { \
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.read = key_##name##_read, \
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.open = mac80211_open_file_generic, \
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#define KEY_FILE(name, format) \
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KEY_READ_##format(name) \
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KEY_FILE(force_sw_encrypt, D);
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KEY_FILE(hw_key_idx, D);
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KEY_FILE(tx_rx_count, D);
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static ssize_t key_algorithm_read(struct file *file,
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size_t count, loff_t *ppos)
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struct ieee80211_key *key = file->private_data;
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return simple_read_from_buffer(userbuf, count, ppos, alg, strlen(alg));
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static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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struct ieee80211_key *key = file->private_data;
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len = scnprintf(buf, sizeof(buf), "\n");
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len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
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tpn = key->u.ccmp.tx_pn;
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len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
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tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]);
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return simple_read_from_buffer(userbuf, count, ppos, buf, len);
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static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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struct ieee80211_key *key = file->private_data;
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char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf;
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len = scnprintf(buf, sizeof(buf), "\n");
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for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
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p += scnprintf(p, sizeof(buf)+buf-p,
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key->u.tkip.iv32_rx[i],
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key->u.tkip.iv16_rx[i]);
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for (i = 0; i < NUM_RX_DATA_QUEUES; i++) {
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rpn = key->u.ccmp.rx_pn[i];
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p += scnprintf(p, sizeof(buf)+buf-p,
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"%02x%02x%02x%02x%02x%02x\n",
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rpn[0], rpn[1], rpn[2],
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rpn[3], rpn[4], rpn[5]);
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return simple_read_from_buffer(userbuf, count, ppos, buf, len);
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static ssize_t key_replays_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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struct ieee80211_key *key = file->private_data;
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if (key->alg != ALG_CCMP)
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len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
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return simple_read_from_buffer(userbuf, count, ppos, buf, len);
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static ssize_t key_key_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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struct ieee80211_key *key = file->private_data;
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int i, res, bufsize = 2*key->keylen+2;
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char *buf = kmalloc(bufsize, GFP_KERNEL);
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for (i = 0; i < key->keylen; i++)
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p += scnprintf(p, bufsize+buf-p, "%02x", key->key[i]);
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p += scnprintf(p, bufsize+buf-p, "\n");
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res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
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#define DEBUGFS_ADD(name) \
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key->debugfs.name = debugfs_create_file(#name, 0400,\
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key->debugfs.dir, key, &key_##name##_ops);
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void ieee80211_debugfs_key_add(struct ieee80211_local *local,
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struct ieee80211_key *key)
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if (!local->debugfs.keys)
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sprintf(buf, "%d", key->keyidx);
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key->debugfs.dir = debugfs_create_dir(buf,
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local->debugfs.keys);
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if (!key->debugfs.dir)
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DEBUGFS_ADD(force_sw_encrypt);
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DEBUGFS_ADD(hw_key_idx);
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DEBUGFS_ADD(tx_rx_count);
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DEBUGFS_ADD(algorithm);
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DEBUGFS_ADD(tx_spec);
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DEBUGFS_ADD(rx_spec);
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DEBUGFS_ADD(replays);
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#define DEBUGFS_DEL(name) \
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debugfs_remove(key->debugfs.name); key->debugfs.name = NULL;
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void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
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DEBUGFS_DEL(force_sw_encrypt);
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DEBUGFS_DEL(hw_key_idx);
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DEBUGFS_DEL(tx_rx_count);
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DEBUGFS_DEL(algorithm);
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DEBUGFS_DEL(tx_spec);
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DEBUGFS_DEL(rx_spec);
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DEBUGFS_DEL(replays);
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debugfs_remove(key->debugfs.stalink);
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key->debugfs.stalink = NULL;
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debugfs_remove(key->debugfs.dir);
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key->debugfs.dir = NULL;
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void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata)
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if (!sdata->debugfsdir)
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sprintf(buf, "../keys/%d", sdata->default_key->keyidx);
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sdata->debugfs.default_key =
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debugfs_create_symlink("default_key", sdata->debugfsdir, buf);
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void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
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debugfs_remove(sdata->debugfs.default_key);
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sdata->debugfs.default_key = NULL;
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void ieee80211_debugfs_key_sta_link(struct ieee80211_key *key,
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struct sta_info *sta)
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if (!key->debugfs.dir)
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sprintf(buf, "../sta/" MAC_FMT, MAC_ARG(sta->addr));
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key->debugfs.stalink =
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debugfs_create_symlink("station", key->debugfs.dir, buf);
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void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
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struct sta_info *sta)
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debugfs_remove(key->debugfs.stalink);
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key->debugfs.stalink = NULL;