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linux/net/mac80211/cfg.c

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/*
* mac80211 configuration hooks for cfg80211
*
* Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
*
* This file is GPLv2 as found in COPYING.
*/
#include <linux/ieee80211.h>
#include <linux/nl80211.h>
#include <linux/rtnetlink.h>
[NET]: Make the device list and device lookups per namespace. This patch makes most of the generic device layer network namespace safe. This patch makes dev_base_head a network namespace variable, and then it picks up a few associated variables. The functions: dev_getbyhwaddr dev_getfirsthwbytype dev_get_by_flags dev_get_by_name __dev_get_by_name dev_get_by_index __dev_get_by_index dev_ioctl dev_ethtool dev_load wireless_process_ioctl were modified to take a network namespace argument, and deal with it. vlan_ioctl_set and brioctl_set were modified so their hooks will receive a network namespace argument. So basically anthing in the core of the network stack that was affected to by the change of dev_base was modified to handle multiple network namespaces. The rest of the network stack was simply modified to explicitly use &init_net the initial network namespace. This can be fixed when those components of the network stack are modified to handle multiple network namespaces. For now the ifindex generator is left global. Fundametally ifindex numbers are per namespace, or else we will have corner case problems with migration when we get that far. At the same time there are assumptions in the network stack that the ifindex of a network device won't change. Making the ifindex number global seems a good compromise until the network stack can cope with ifindex changes when you change namespaces, and the like. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-09-17 11:56:21 -07:00
#include <net/net_namespace.h>
#include <net/cfg80211.h>
#include "ieee80211_i.h"
#include "cfg.h"
static enum ieee80211_if_types
nl80211_type_to_mac80211_type(enum nl80211_iftype type)
{
switch (type) {
case NL80211_IFTYPE_UNSPECIFIED:
return IEEE80211_IF_TYPE_STA;
case NL80211_IFTYPE_ADHOC:
return IEEE80211_IF_TYPE_IBSS;
case NL80211_IFTYPE_STATION:
return IEEE80211_IF_TYPE_STA;
case NL80211_IFTYPE_MONITOR:
return IEEE80211_IF_TYPE_MNTR;
default:
return IEEE80211_IF_TYPE_INVALID;
}
}
static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
enum nl80211_iftype type)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
enum ieee80211_if_types itype;
if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
return -ENODEV;
itype = nl80211_type_to_mac80211_type(type);
if (itype == IEEE80211_IF_TYPE_INVALID)
return -EINVAL;
return ieee80211_if_add(local->mdev, name, NULL, itype);
}
static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
struct net_device *dev;
char *name;
if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
return -ENODEV;
/* we're under RTNL */
dev = __dev_get_by_index(&init_net, ifindex);
if (!dev)
return 0;
name = dev->name;
return ieee80211_if_remove(local->mdev, name, -1);
}
static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
enum nl80211_iftype type)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
struct net_device *dev;
enum ieee80211_if_types itype;
struct ieee80211_sub_if_data *sdata;
if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
return -ENODEV;
/* we're under RTNL */
dev = __dev_get_by_index(&init_net, ifindex);
if (!dev)
return -ENODEV;
if (netif_running(dev))
return -EBUSY;
itype = nl80211_type_to_mac80211_type(type);
if (itype == IEEE80211_IF_TYPE_INVALID)
return -EINVAL;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (sdata->type == IEEE80211_IF_TYPE_VLAN)
return -EOPNOTSUPP;
ieee80211_if_reinit(dev);
ieee80211_if_set_type(dev, itype);
return 0;
}
static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
u8 key_idx, u8 *mac_addr,
struct key_params *params)
{
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta = NULL;
enum ieee80211_key_alg alg;
int ret;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
switch (params->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
alg = ALG_WEP;
break;
case WLAN_CIPHER_SUITE_TKIP:
alg = ALG_TKIP;
break;
case WLAN_CIPHER_SUITE_CCMP:
alg = ALG_CCMP;
break;
default:
return -EINVAL;
}
if (mac_addr) {
sta = sta_info_get(sdata->local, mac_addr);
if (!sta)
return -ENOENT;
}
ret = 0;
if (!ieee80211_key_alloc(sdata, sta, alg, key_idx,
params->key_len, params->key))
ret = -ENOMEM;
if (sta)
sta_info_put(sta);
return ret;
}
static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
u8 key_idx, u8 *mac_addr)
{
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta;
int ret;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (mac_addr) {
sta = sta_info_get(sdata->local, mac_addr);
if (!sta)
return -ENOENT;
ret = 0;
if (sta->key)
ieee80211_key_free(sta->key);
else
ret = -ENOENT;
sta_info_put(sta);
return ret;
}
if (!sdata->keys[key_idx])
return -ENOENT;
ieee80211_key_free(sdata->keys[key_idx]);
return 0;
}
static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
u8 key_idx, u8 *mac_addr, void *cookie,
void (*callback)(void *cookie,
struct key_params *params))
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct sta_info *sta = NULL;
u8 seq[6] = {0};
struct key_params params;
struct ieee80211_key *key;
u32 iv32;
u16 iv16;
int err = -ENOENT;
if (mac_addr) {
sta = sta_info_get(sdata->local, mac_addr);
if (!sta)
goto out;
key = sta->key;
} else
key = sdata->keys[key_idx];
if (!key)
goto out;
memset(&params, 0, sizeof(params));
switch (key->conf.alg) {
case ALG_TKIP:
params.cipher = WLAN_CIPHER_SUITE_TKIP;
iv32 = key->u.tkip.iv32;
iv16 = key->u.tkip.iv16;
if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
sdata->local->ops->get_tkip_seq)
sdata->local->ops->get_tkip_seq(
local_to_hw(sdata->local),
key->conf.hw_key_idx,
&iv32, &iv16);
seq[0] = iv16 & 0xff;
seq[1] = (iv16 >> 8) & 0xff;
seq[2] = iv32 & 0xff;
seq[3] = (iv32 >> 8) & 0xff;
seq[4] = (iv32 >> 16) & 0xff;
seq[5] = (iv32 >> 24) & 0xff;
params.seq = seq;
params.seq_len = 6;
break;
case ALG_CCMP:
params.cipher = WLAN_CIPHER_SUITE_CCMP;
seq[0] = key->u.ccmp.tx_pn[5];
seq[1] = key->u.ccmp.tx_pn[4];
seq[2] = key->u.ccmp.tx_pn[3];
seq[3] = key->u.ccmp.tx_pn[2];
seq[4] = key->u.ccmp.tx_pn[1];
seq[5] = key->u.ccmp.tx_pn[0];
params.seq = seq;
params.seq_len = 6;
break;
case ALG_WEP:
if (key->conf.keylen == 5)
params.cipher = WLAN_CIPHER_SUITE_WEP40;
else
params.cipher = WLAN_CIPHER_SUITE_WEP104;
break;
}
params.key = key->conf.key;
params.key_len = key->conf.keylen;
callback(cookie, &params);
err = 0;
out:
if (sta)
sta_info_put(sta);
return err;
}
static int ieee80211_config_default_key(struct wiphy *wiphy,
struct net_device *dev,
u8 key_idx)
{
struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
ieee80211_set_default_key(sdata, key_idx);
return 0;
}
struct cfg80211_ops mac80211_config_ops = {
.add_virtual_intf = ieee80211_add_iface,
.del_virtual_intf = ieee80211_del_iface,
.change_virtual_intf = ieee80211_change_iface,
.add_key = ieee80211_add_key,
.del_key = ieee80211_del_key,
.get_key = ieee80211_get_key,
.set_default_key = ieee80211_config_default_key,
};