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linux/net/mac80211/debugfs_netdev.c
Johannes Berg ce3edf6d0b mac80211: clean up eapol frame handling/port control 
This cleans up the eapol frame handling and some related code in the
receive and transmit paths. After this patch
 * EAPOL frames addressed to us or the EAPOL group address are
   always accepted regardless of whether they are encrypted or not
 * other frames from a station are dropped if PAE is enabled and
   the station is not authorized
 * unencrypted frames (except the EAPOL frames above) are dropped if
   drop_unencrypted is enabled
 * some superfluous code that eth_type_trans handles anyway is gone
 * port control is done for transmitted packets

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:59:45 -08:00

417 lines
12 KiB
C
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/*
* 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/kernel.h>
#include <linux/device.h>
#include <linux/if.h>
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <linux/notifier.h>
#include <net/mac80211.h>
#include <net/cfg80211.h>
#include "ieee80211_i.h"
#include "ieee80211_rate.h"
#include "debugfs.h"
#include "debugfs_netdev.h"
static ssize_t ieee80211_if_read(
struct ieee80211_sub_if_data *sdata,
char __user *userbuf,
size_t count, loff_t *ppos,
ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int))
{
char buf[70];
ssize_t ret = -EINVAL;
read_lock(&dev_base_lock);
if (sdata->dev->reg_state == NETREG_REGISTERED) {
ret = (*format)(sdata, buf, sizeof(buf));
ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
}
read_unlock(&dev_base_lock);
return ret;
}
#define IEEE80211_IF_FMT(name, field, format_string) \
static ssize_t ieee80211_if_fmt_##name( \
const struct ieee80211_sub_if_data *sdata, char *buf, \
int buflen) \
{ \
return scnprintf(buf, buflen, format_string, sdata->field); \
}
#define IEEE80211_IF_FMT_DEC(name, field) \
IEEE80211_IF_FMT(name, field, "%d\n")
#define IEEE80211_IF_FMT_HEX(name, field) \
IEEE80211_IF_FMT(name, field, "%#x\n")
#define IEEE80211_IF_FMT_SIZE(name, field) \
IEEE80211_IF_FMT(name, field, "%zd\n")
#define IEEE80211_IF_FMT_ATOMIC(name, field) \
static ssize_t ieee80211_if_fmt_##name( \
const struct ieee80211_sub_if_data *sdata, \
char *buf, int buflen) \
{ \
return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
}
#define IEEE80211_IF_FMT_MAC(name, field) \
static ssize_t ieee80211_if_fmt_##name( \
const struct ieee80211_sub_if_data *sdata, char *buf, \
int buflen) \
{ \
DECLARE_MAC_BUF(mac); \
return scnprintf(buf, buflen, "%s\n", print_mac(mac, sdata->field));\
}
#define __IEEE80211_IF_FILE(name) \
static ssize_t ieee80211_if_read_##name(struct file *file, \
char __user *userbuf, \
size_t count, loff_t *ppos) \
{ \
return ieee80211_if_read(file->private_data, \
userbuf, count, ppos, \
ieee80211_if_fmt_##name); \
} \
static const struct file_operations name##_ops = { \
.read = ieee80211_if_read_##name, \
.open = mac80211_open_file_generic, \
}
#define IEEE80211_IF_FILE(name, field, format) \
IEEE80211_IF_FMT_##format(name, field) \
__IEEE80211_IF_FILE(name)
/* common attributes */
IEEE80211_IF_FILE(channel_use, channel_use, DEC);
IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
IEEE80211_IF_FILE(ieee802_1x_pac, ieee802_1x_pac, DEC);
/* STA/IBSS attributes */
IEEE80211_IF_FILE(state, u.sta.state, DEC);
IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
static ssize_t ieee80211_if_fmt_flags(
const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
{
return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
sdata->u.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
sdata->flags & IEEE80211_SDATA_USE_PROTECTION ? "CTS prot\n" : "");
}
__IEEE80211_IF_FILE(flags);
/* AP attributes */
IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
IEEE80211_IF_FILE(dtim_period, u.ap.dtim_period, DEC);
IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC);
IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, DEC);
static ssize_t ieee80211_if_fmt_num_buffered_multicast(
const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
{
return scnprintf(buf, buflen, "%u\n",
skb_queue_len(&sdata->u.ap.ps_bc_buf));
}
__IEEE80211_IF_FILE(num_buffered_multicast);
static ssize_t ieee80211_if_fmt_beacon_head_len(
const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
{
if (sdata->u.ap.beacon_head)
return scnprintf(buf, buflen, "%d\n",
sdata->u.ap.beacon_head_len);
return scnprintf(buf, buflen, "\n");
}
__IEEE80211_IF_FILE(beacon_head_len);
static ssize_t ieee80211_if_fmt_beacon_tail_len(
const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
{
if (sdata->u.ap.beacon_tail)
return scnprintf(buf, buflen, "%d\n",
sdata->u.ap.beacon_tail_len);
return scnprintf(buf, buflen, "\n");
}
__IEEE80211_IF_FILE(beacon_tail_len);
/* WDS attributes */
IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
#define DEBUGFS_ADD(name, type)\
sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
sdata->debugfsdir, sdata, &name##_ops);
static void add_sta_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_ADD(channel_use, sta);
DEBUGFS_ADD(drop_unencrypted, sta);
DEBUGFS_ADD(ieee802_1x_pac, sta);
DEBUGFS_ADD(state, sta);
DEBUGFS_ADD(bssid, sta);
DEBUGFS_ADD(prev_bssid, sta);
DEBUGFS_ADD(ssid_len, sta);
DEBUGFS_ADD(aid, sta);
DEBUGFS_ADD(ap_capab, sta);
DEBUGFS_ADD(capab, sta);
DEBUGFS_ADD(extra_ie_len, sta);
DEBUGFS_ADD(auth_tries, sta);
DEBUGFS_ADD(assoc_tries, sta);
DEBUGFS_ADD(auth_algs, sta);
DEBUGFS_ADD(auth_alg, sta);
DEBUGFS_ADD(auth_transaction, sta);
DEBUGFS_ADD(flags, sta);
}
static void add_ap_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_ADD(channel_use, ap);
DEBUGFS_ADD(drop_unencrypted, ap);
DEBUGFS_ADD(ieee802_1x_pac, ap);
DEBUGFS_ADD(num_sta_ps, ap);
DEBUGFS_ADD(dtim_period, ap);
DEBUGFS_ADD(dtim_count, ap);
DEBUGFS_ADD(num_beacons, ap);
DEBUGFS_ADD(force_unicast_rateidx, ap);
DEBUGFS_ADD(max_ratectrl_rateidx, ap);
DEBUGFS_ADD(num_buffered_multicast, ap);
DEBUGFS_ADD(beacon_head_len, ap);
DEBUGFS_ADD(beacon_tail_len, ap);
}
static void add_wds_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_ADD(channel_use, wds);
DEBUGFS_ADD(drop_unencrypted, wds);
DEBUGFS_ADD(ieee802_1x_pac, wds);
DEBUGFS_ADD(peer, wds);
}
static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_ADD(channel_use, vlan);
DEBUGFS_ADD(drop_unencrypted, vlan);
DEBUGFS_ADD(ieee802_1x_pac, vlan);
}
static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
{
}
static void add_files(struct ieee80211_sub_if_data *sdata)
{
if (!sdata->debugfsdir)
return;
switch (sdata->type) {
case IEEE80211_IF_TYPE_STA:
case IEEE80211_IF_TYPE_IBSS:
add_sta_files(sdata);
break;
case IEEE80211_IF_TYPE_AP:
add_ap_files(sdata);
break;
case IEEE80211_IF_TYPE_WDS:
add_wds_files(sdata);
break;
case IEEE80211_IF_TYPE_MNTR:
add_monitor_files(sdata);
break;
case IEEE80211_IF_TYPE_VLAN:
add_vlan_files(sdata);
break;
default:
break;
}
}
#define DEBUGFS_DEL(name, type) \
do { \
debugfs_remove(sdata->debugfs.type.name); \
sdata->debugfs.type.name = NULL; \
} while (0)
static void del_sta_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_DEL(channel_use, sta);
DEBUGFS_DEL(drop_unencrypted, sta);
DEBUGFS_DEL(ieee802_1x_pac, sta);
DEBUGFS_DEL(state, sta);
DEBUGFS_DEL(bssid, sta);
DEBUGFS_DEL(prev_bssid, sta);
DEBUGFS_DEL(ssid_len, sta);
DEBUGFS_DEL(aid, sta);
DEBUGFS_DEL(ap_capab, sta);
DEBUGFS_DEL(capab, sta);
DEBUGFS_DEL(extra_ie_len, sta);
DEBUGFS_DEL(auth_tries, sta);
DEBUGFS_DEL(assoc_tries, sta);
DEBUGFS_DEL(auth_algs, sta);
DEBUGFS_DEL(auth_alg, sta);
DEBUGFS_DEL(auth_transaction, sta);
DEBUGFS_DEL(flags, sta);
}
static void del_ap_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_DEL(channel_use, ap);
DEBUGFS_DEL(drop_unencrypted, ap);
DEBUGFS_DEL(ieee802_1x_pac, ap);
DEBUGFS_DEL(num_sta_ps, ap);
DEBUGFS_DEL(dtim_period, ap);
DEBUGFS_DEL(dtim_count, ap);
DEBUGFS_DEL(num_beacons, ap);
DEBUGFS_DEL(force_unicast_rateidx, ap);
DEBUGFS_DEL(max_ratectrl_rateidx, ap);
DEBUGFS_DEL(num_buffered_multicast, ap);
DEBUGFS_DEL(beacon_head_len, ap);
DEBUGFS_DEL(beacon_tail_len, ap);
}
static void del_wds_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_DEL(channel_use, wds);
DEBUGFS_DEL(drop_unencrypted, wds);
DEBUGFS_DEL(ieee802_1x_pac, wds);
DEBUGFS_DEL(peer, wds);
}
static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_DEL(channel_use, vlan);
DEBUGFS_DEL(drop_unencrypted, vlan);
DEBUGFS_DEL(ieee802_1x_pac, vlan);
}
static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
{
}
static void del_files(struct ieee80211_sub_if_data *sdata, int type)
{
if (!sdata->debugfsdir)
return;
switch (type) {
case IEEE80211_IF_TYPE_STA:
case IEEE80211_IF_TYPE_IBSS:
del_sta_files(sdata);
break;
case IEEE80211_IF_TYPE_AP:
del_ap_files(sdata);
break;
case IEEE80211_IF_TYPE_WDS:
del_wds_files(sdata);
break;
case IEEE80211_IF_TYPE_MNTR:
del_monitor_files(sdata);
break;
case IEEE80211_IF_TYPE_VLAN:
del_vlan_files(sdata);
break;
default:
break;
}
}
static int notif_registered;
void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
{
char buf[10+IFNAMSIZ];
if (!notif_registered)
return;
sprintf(buf, "netdev:%s", sdata->dev->name);
sdata->debugfsdir = debugfs_create_dir(buf,
sdata->local->hw.wiphy->debugfsdir);
}
void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
{
del_files(sdata, sdata->type);
debugfs_remove(sdata->debugfsdir);
sdata->debugfsdir = NULL;
}
void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata,
int oldtype)
{
del_files(sdata, oldtype);
add_files(sdata);
}
static int netdev_notify(struct notifier_block * nb,
unsigned long state,
void *ndev)
{
struct net_device *dev = ndev;
struct dentry *dir;
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
char buf[10+IFNAMSIZ];
if (state != NETDEV_CHANGENAME)
return 0;
if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
return 0;
if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
return 0;
sprintf(buf, "netdev:%s", dev->name);
dir = sdata->debugfsdir;
if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
"dir to %s\n", buf);
return 0;
}
static struct notifier_block mac80211_debugfs_netdev_notifier = {
.notifier_call = netdev_notify,
};
void ieee80211_debugfs_netdev_init(void)
{
int err;
err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
if (err) {
printk(KERN_ERR
"mac80211: failed to install netdev notifier,"
" disabling per-netdev debugfs!\n");
} else
notif_registered = 1;
}
void ieee80211_debugfs_netdev_exit(void)
{
unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
notif_registered = 0;
}
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