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root/net/mac80211/debugfs_key.c

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DEFINITIONS

This source file includes following definitions.
  1. key_algorithm_read
  2. key_tx_spec_read
  3. key_rx_spec_read
  4. key_replays_read
  5. key_key_read
  6. ieee80211_debugfs_key_add
  7. ieee80211_debugfs_key_remove
  8. ieee80211_debugfs_key_add_default
  9. ieee80211_debugfs_key_remove_default
  10. ieee80211_debugfs_key_sta_del

/*
 * 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 "key.h"
#include "debugfs.h"
#include "debugfs_key.h"

#define KEY_READ(name, prop, 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->prop);     \
        return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
}
#define KEY_READ_D(name) KEY_READ(name, name, 20, "%d\n")
#define KEY_READ_X(name) KEY_READ(name, name, 20, "0x%x\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)

#define KEY_CONF_READ(name, buflen, format_string)                      \
        KEY_READ(conf_##name, conf.name, buflen, format_string)
#define KEY_CONF_READ_D(name) KEY_CONF_READ(name, 20, "%d\n")

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

#define KEY_CONF_FILE(name, format)                                     \
                 KEY_CONF_READ_##format(name)                           \
                 KEY_CONF_OPS(name)

KEY_CONF_FILE(keylen, D);
KEY_CONF_FILE(keyidx, D);
KEY_CONF_FILE(hw_key_idx, D);
KEY_FILE(flags, X);
KEY_FILE(tx_rx_count, D);
KEY_READ(ifindex, sdata->dev->ifindex, 20, "%d\n");
KEY_OPS(ifindex);

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->conf.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->conf.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.tx.iv32,
                                key->u.tkip.tx.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->conf.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.rx[i].iv32,
                                       key->u.tkip.rx[i].iv16);
                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->conf.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->conf.keylen + 2;
        char *buf = kmalloc(bufsize, GFP_KERNEL);
        char *p = buf;

        for (i = 0; i < key->conf.keylen; i++)
                p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.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_key *key)
  {
        static int keycount;
        char buf[50];
        DECLARE_MAC_BUF(mac);
        struct sta_info *sta;

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

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

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

        rcu_read_lock();
        sta = rcu_dereference(key->sta);
        if (sta)
                sprintf(buf, "../../stations/%s",
                        print_mac(mac, sta->sta.addr));
        rcu_read_unlock();

        /* using sta as a boolean is fine outside RCU lock */
        if (sta)
                key->debugfs.stalink =
                        debugfs_create_symlink("station", key->debugfs.dir, buf);

        DEBUGFS_ADD(keylen);
        DEBUGFS_ADD(flags);
        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);
        DEBUGFS_ADD(ifindex);
};

#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(flags);
        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_DEL(ifindex);

        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];
        struct ieee80211_key *key;

        if (!sdata->debugfsdir)
                return;

        /* this is running under the key lock */

        key = sdata->default_key;
        if (key) {
                sprintf(buf, "../keys/%d", key->debugfs.cnt);
                sdata->common_debugfs.default_key =
                        debugfs_create_symlink("default_key",
                                               sdata->debugfsdir, buf);
        } else
                ieee80211_debugfs_key_remove_default(sdata);
}

void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
{
        if (!sdata)
                return;

        debugfs_remove(sdata->common_debugfs.default_key);
        sdata->common_debugfs.default_key = NULL;
}

void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
                                   struct sta_info *sta)
{
        debugfs_remove(key->debugfs.stalink);
        key->debugfs.stalink = NULL;
}

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