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linux/net/wireless/nl80211.c
Juuso Oikarinen d6dc1a3863 cfg80211: Add connection quality monitoring support to nl80211 
Add support for basic configuration of a connection quality monitoring to the
nl80211 interface, and basic support for notifying about triggered monitoring
events.

Via this interface a user-space connection manager may configure and receive
pre-warning events of deteriorating WLAN connection quality, and start
preparing for roaming in advance, before the connection is already lost.

An example usage of such a trigger is starting scanning for nearby AP's in
an attempt to find one with better connection quality, and associate to it
before the connection characteristics of the existing connection become too bad
or the association is even lost, leading in a prolonged delay in connectivity.

The interface currently supports only RSSI, but it could be later extended
to include other parameters, such as signal-to-noise ratio, if need for that
arises.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-03-24 16:02:37 -04:00

6040 lines
137 KiB
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/*
* This is the new netlink-based wireless configuration interface.
*
* Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
*/
#include <linux/if.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/list.h>
#include <linux/if_ether.h>
#include <linux/ieee80211.h>
#include <linux/nl80211.h>
#include <linux/rtnetlink.h>
#include <linux/netlink.h>
#include <linux/etherdevice.h>
#include <net/net_namespace.h>
#include <net/genetlink.h>
#include <net/cfg80211.h>
#include <net/sock.h>
#include "core.h"
#include "nl80211.h"
#include "reg.h"
/* the netlink family */
static struct genl_family nl80211_fam = {
.id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
.name = "nl80211", /* have users key off the name instead */
.hdrsize = 0, /* no private header */
.version = 1, /* no particular meaning now */
.maxattr = NL80211_ATTR_MAX,
.netnsok = true,
};
/* internal helper: get rdev and dev */
static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
struct cfg80211_registered_device **rdev,
struct net_device **dev)
{
struct nlattr **attrs = info->attrs;
int ifindex;
if (!attrs[NL80211_ATTR_IFINDEX])
return -EINVAL;
ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
*dev = dev_get_by_index(genl_info_net(info), ifindex);
if (!*dev)
return -ENODEV;
*rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
if (IS_ERR(*rdev)) {
dev_put(*dev);
return PTR_ERR(*rdev);
}
return 0;
}
/* policy for the attributes */
static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
.len = 20-1 },
[NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
[NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
[NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
[NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
[NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
[NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
[NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
[NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
[NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
[NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
[NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
[NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
.len = WLAN_MAX_KEY_LEN },
[NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
[NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
[NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
[NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
[NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
[NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
[NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
.len = IEEE80211_MAX_DATA_LEN },
[NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
.len = IEEE80211_MAX_DATA_LEN },
[NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
[NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
[NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
[NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
.len = NL80211_MAX_SUPP_RATES },
[NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
[NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
[NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
.len = IEEE80211_MAX_MESH_ID_LEN },
[NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
[NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
[NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
[NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
[NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
[NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
[NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
.len = NL80211_MAX_SUPP_RATES },
[NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
[NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
.len = NL80211_HT_CAPABILITY_LEN },
[NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
[NL80211_ATTR_IE] = { .type = NLA_BINARY,
.len = IEEE80211_MAX_DATA_LEN },
[NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
[NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
[NL80211_ATTR_SSID] = { .type = NLA_BINARY,
.len = IEEE80211_MAX_SSID_LEN },
[NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
[NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
[NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
[NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
[NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
[NL80211_ATTR_STA_FLAGS2] = {
.len = sizeof(struct nl80211_sta_flag_update),
},
[NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
[NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
[NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
[NL80211_ATTR_PID] = { .type = NLA_U32 },
[NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
[NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
.len = WLAN_PMKID_LEN },
[NL80211_ATTR_DURATION] = { .type = NLA_U32 },
[NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
[NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
[NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
.len = IEEE80211_MAX_DATA_LEN },
[NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
[NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
[NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
};
/* policy for the attributes */
static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
[NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
[NL80211_KEY_IDX] = { .type = NLA_U8 },
[NL80211_KEY_CIPHER] = { .type = NLA_U32 },
[NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
[NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
[NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
};
/* ifidx get helper */
static int nl80211_get_ifidx(struct netlink_callback *cb)
{
int res;
res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
nl80211_fam.attrbuf, nl80211_fam.maxattr,
nl80211_policy);
if (res)
return res;
if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
return -EINVAL;
res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
if (!res)
return -EINVAL;
return res;
}
/* IE validation */
static bool is_valid_ie_attr(const struct nlattr *attr)
{
const u8 *pos;
int len;
if (!attr)
return true;
pos = nla_data(attr);
len = nla_len(attr);
while (len) {
u8 elemlen;
if (len < 2)
return false;
len -= 2;
elemlen = pos[1];
if (elemlen > len)
return false;
len -= elemlen;
pos += 2 + elemlen;
}
return true;
}
/* message building helper */
static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
int flags, u8 cmd)
{
/* since there is no private header just add the generic one */
return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
}
static int nl80211_msg_put_channel(struct sk_buff *msg,
struct ieee80211_channel *chan)
{
NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
chan->center_freq);
if (chan->flags & IEEE80211_CHAN_DISABLED)
NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
if (chan->flags & IEEE80211_CHAN_NO_IBSS)
NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
if (chan->flags & IEEE80211_CHAN_RADAR)
NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
DBM_TO_MBM(chan->max_power));
return 0;
nla_put_failure:
return -ENOBUFS;
}
/* netlink command implementations */
struct key_parse {
struct key_params p;
int idx;
bool def, defmgmt;
};
static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
{
struct nlattr *tb[NL80211_KEY_MAX + 1];
int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
nl80211_key_policy);
if (err)
return err;
k->def = !!tb[NL80211_KEY_DEFAULT];
k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
if (tb[NL80211_KEY_IDX])
k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
if (tb[NL80211_KEY_DATA]) {
k->p.key = nla_data(tb[NL80211_KEY_DATA]);
k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
}
if (tb[NL80211_KEY_SEQ]) {
k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
}
if (tb[NL80211_KEY_CIPHER])
k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
return 0;
}
static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
{
if (info->attrs[NL80211_ATTR_KEY_DATA]) {
k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
}
if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
}
if (info->attrs[NL80211_ATTR_KEY_IDX])
k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
if (info->attrs[NL80211_ATTR_KEY_CIPHER])
k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
return 0;
}
static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
{
int err;
memset(k, 0, sizeof(*k));
k->idx = -1;
if (info->attrs[NL80211_ATTR_KEY])
err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
else
err = nl80211_parse_key_old(info, k);
if (err)
return err;
if (k->def && k->defmgmt)
return -EINVAL;
if (k->idx != -1) {
if (k->defmgmt) {
if (k->idx < 4 || k->idx > 5)
return -EINVAL;
} else if (k->def) {
if (k->idx < 0 || k->idx > 3)
return -EINVAL;
} else {
if (k->idx < 0 || k->idx > 5)
return -EINVAL;
}
}
return 0;
}
static struct cfg80211_cached_keys *
nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
struct nlattr *keys)
{
struct key_parse parse;
struct nlattr *key;
struct cfg80211_cached_keys *result;
int rem, err, def = 0;
result = kzalloc(sizeof(*result), GFP_KERNEL);
if (!result)
return ERR_PTR(-ENOMEM);
result->def = -1;
result->defmgmt = -1;
nla_for_each_nested(key, keys, rem) {
memset(&parse, 0, sizeof(parse));
parse.idx = -1;
err = nl80211_parse_key_new(key, &parse);
if (err)
goto error;
err = -EINVAL;
if (!parse.p.key)
goto error;
if (parse.idx < 0 || parse.idx > 4)
goto error;
if (parse.def) {
if (def)
goto error;
def = 1;
result->def = parse.idx;
} else if (parse.defmgmt)
goto error;
err = cfg80211_validate_key_settings(rdev, &parse.p,
parse.idx, NULL);
if (err)
goto error;
result->params[parse.idx].cipher = parse.p.cipher;
result->params[parse.idx].key_len = parse.p.key_len;
result->params[parse.idx].key = result->data[parse.idx];
memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
}
return result;
error:
kfree(result);
return ERR_PTR(err);
}
static int nl80211_key_allowed(struct wireless_dev *wdev)
{
ASSERT_WDEV_LOCK(wdev);
if (!netif_running(wdev->netdev))
return -ENETDOWN;
switch (wdev->iftype) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_AP_VLAN:
break;
case NL80211_IFTYPE_ADHOC:
if (!wdev->current_bss)
return -ENOLINK;
break;
case NL80211_IFTYPE_STATION:
if (wdev->sme_state != CFG80211_SME_CONNECTED)
return -ENOLINK;
break;
default:
return -EINVAL;
}
return 0;
}
static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
struct cfg80211_registered_device *dev)
{
void *hdr;
struct nlattr *nl_bands, *nl_band;
struct nlattr *nl_freqs, *nl_freq;
struct nlattr *nl_rates, *nl_rate;
struct nlattr *nl_modes;
struct nlattr *nl_cmds;
enum ieee80211_band band;
struct ieee80211_channel *chan;
struct ieee80211_rate *rate;
int i;
u16 ifmodes = dev->wiphy.interface_modes;
hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
if (!hdr)
return -1;
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
cfg80211_rdev_list_generation);
NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
dev->wiphy.retry_short);
NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
dev->wiphy.retry_long);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
dev->wiphy.frag_threshold);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
dev->wiphy.rts_threshold);
NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
dev->wiphy.coverage_class);
NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
dev->wiphy.max_scan_ssids);
NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
dev->wiphy.max_scan_ie_len);
NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
sizeof(u32) * dev->wiphy.n_cipher_suites,
dev->wiphy.cipher_suites);
NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
dev->wiphy.max_num_pmkids);
nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
if (!nl_modes)
goto nla_put_failure;
i = 0;
while (ifmodes) {
if (ifmodes & 1)
NLA_PUT_FLAG(msg, i);
ifmodes >>= 1;
i++;
}
nla_nest_end(msg, nl_modes);
nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
if (!nl_bands)
goto nla_put_failure;
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
if (!dev->wiphy.bands[band])
continue;
nl_band = nla_nest_start(msg, band);
if (!nl_band)
goto nla_put_failure;
/* add HT info */
if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
&dev->wiphy.bands[band]->ht_cap.mcs);
NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
dev->wiphy.bands[band]->ht_cap.cap);
NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
dev->wiphy.bands[band]->ht_cap.ampdu_factor);
NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
dev->wiphy.bands[band]->ht_cap.ampdu_density);
}
/* add frequencies */
nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
if (!nl_freqs)
goto nla_put_failure;
for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
nl_freq = nla_nest_start(msg, i);
if (!nl_freq)
goto nla_put_failure;
chan = &dev->wiphy.bands[band]->channels[i];
if (nl80211_msg_put_channel(msg, chan))
goto nla_put_failure;
nla_nest_end(msg, nl_freq);
}
nla_nest_end(msg, nl_freqs);
/* add bitrates */
nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
if (!nl_rates)
goto nla_put_failure;
for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
nl_rate = nla_nest_start(msg, i);
if (!nl_rate)
goto nla_put_failure;
rate = &dev->wiphy.bands[band]->bitrates[i];
NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
rate->bitrate);
if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
NLA_PUT_FLAG(msg,
NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
nla_nest_end(msg, nl_rate);
}
nla_nest_end(msg, nl_rates);
nla_nest_end(msg, nl_band);
}
nla_nest_end(msg, nl_bands);
nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
if (!nl_cmds)
goto nla_put_failure;
i = 0;
#define CMD(op, n) \
do { \
if (dev->ops->op) { \
i++; \
NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
} \
} while (0)
CMD(add_virtual_intf, NEW_INTERFACE);
CMD(change_virtual_intf, SET_INTERFACE);
CMD(add_key, NEW_KEY);
CMD(add_beacon, NEW_BEACON);
CMD(add_station, NEW_STATION);
CMD(add_mpath, NEW_MPATH);
CMD(set_mesh_params, SET_MESH_PARAMS);
CMD(change_bss, SET_BSS);
CMD(auth, AUTHENTICATE);
CMD(assoc, ASSOCIATE);
CMD(deauth, DEAUTHENTICATE);
CMD(disassoc, DISASSOCIATE);
CMD(join_ibss, JOIN_IBSS);
CMD(set_pmksa, SET_PMKSA);
CMD(del_pmksa, DEL_PMKSA);
CMD(flush_pmksa, FLUSH_PMKSA);
CMD(remain_on_channel, REMAIN_ON_CHANNEL);
CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
CMD(action, ACTION);
if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
i++;
NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
}
#undef CMD
if (dev->ops->connect || dev->ops->auth) {
i++;
NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
}
if (dev->ops->disconnect || dev->ops->deauth) {
i++;
NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
}
nla_nest_end(msg, nl_cmds);
return genlmsg_end(msg, hdr);
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
{
int idx = 0;
int start = cb->args[0];
struct cfg80211_registered_device *dev;
mutex_lock(&cfg80211_mutex);
list_for_each_entry(dev, &cfg80211_rdev_list, list) {
if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
continue;
if (++idx <= start)
continue;
if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
dev) < 0) {
idx--;
break;
}
}
mutex_unlock(&cfg80211_mutex);
cb->args[0] = idx;
return skb->len;
}
static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *msg;
struct cfg80211_registered_device *dev;
dev = cfg80211_get_dev_from_info(info);
if (IS_ERR(dev))
return PTR_ERR(dev);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
goto out_err;
if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
goto out_free;
cfg80211_unlock_rdev(dev);
return genlmsg_reply(msg, info);
out_free:
nlmsg_free(msg);
out_err:
cfg80211_unlock_rdev(dev);
return -ENOBUFS;
}
static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
[NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
[NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
[NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
[NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
[NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
};
static int parse_txq_params(struct nlattr *tb[],
struct ieee80211_txq_params *txq_params)
{
if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
!tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
!tb[NL80211_TXQ_ATTR_AIFS])
return -EINVAL;
txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
return 0;
}
static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int result = 0, rem_txq_params = 0;
struct nlattr *nl_txq_params;
u32 changed;
u8 retry_short = 0, retry_long = 0;
u32 frag_threshold = 0, rts_threshold = 0;
u8 coverage_class = 0;
rtnl_lock();
mutex_lock(&cfg80211_mutex);
rdev = __cfg80211_rdev_from_info(info);
if (IS_ERR(rdev)) {
mutex_unlock(&cfg80211_mutex);
result = PTR_ERR(rdev);
goto unlock;
}
mutex_lock(&rdev->mtx);
if (info->attrs[NL80211_ATTR_WIPHY_NAME])
result = cfg80211_dev_rename(
rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
mutex_unlock(&cfg80211_mutex);
if (result)
goto bad_res;
if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
struct ieee80211_txq_params txq_params;
struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
if (!rdev->ops->set_txq_params) {
result = -EOPNOTSUPP;
goto bad_res;
}
nla_for_each_nested(nl_txq_params,
info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
rem_txq_params) {
nla_parse(tb, NL80211_TXQ_ATTR_MAX,
nla_data(nl_txq_params),
nla_len(nl_txq_params),
txq_params_policy);
result = parse_txq_params(tb, &txq_params);
if (result)
goto bad_res;
result = rdev->ops->set_txq_params(&rdev->wiphy,
&txq_params);
if (result)
goto bad_res;
}
}
if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
u32 freq;
result = -EINVAL;
if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
channel_type = nla_get_u32(info->attrs[
NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
if (channel_type != NL80211_CHAN_NO_HT &&
channel_type != NL80211_CHAN_HT20 &&
channel_type != NL80211_CHAN_HT40PLUS &&
channel_type != NL80211_CHAN_HT40MINUS)
goto bad_res;
}
freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
mutex_lock(&rdev->devlist_mtx);
result = rdev_set_freq(rdev, NULL, freq, channel_type);
mutex_unlock(&rdev->devlist_mtx);
if (result)
goto bad_res;
}
changed = 0;
if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
retry_short = nla_get_u8(
info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
if (retry_short == 0) {
result = -EINVAL;
goto bad_res;
}
changed |= WIPHY_PARAM_RETRY_SHORT;
}
if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
retry_long = nla_get_u8(
info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
if (retry_long == 0) {
result = -EINVAL;
goto bad_res;
}
changed |= WIPHY_PARAM_RETRY_LONG;
}
if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
frag_threshold = nla_get_u32(
info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
if (frag_threshold < 256) {
result = -EINVAL;
goto bad_res;
}
if (frag_threshold != (u32) -1) {
/*
* Fragments (apart from the last one) are required to
* have even length. Make the fragmentation code
* simpler by stripping LSB should someone try to use
* odd threshold value.
*/
frag_threshold &= ~0x1;
}
changed |= WIPHY_PARAM_FRAG_THRESHOLD;
}
if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
rts_threshold = nla_get_u32(
info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
changed |= WIPHY_PARAM_RTS_THRESHOLD;
}
if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
coverage_class = nla_get_u8(
info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
changed |= WIPHY_PARAM_COVERAGE_CLASS;
}
if (changed) {
u8 old_retry_short, old_retry_long;
u32 old_frag_threshold, old_rts_threshold;
u8 old_coverage_class;
if (!rdev->ops->set_wiphy_params) {
result = -EOPNOTSUPP;
goto bad_res;
}
old_retry_short = rdev->wiphy.retry_short;
old_retry_long = rdev->wiphy.retry_long;
old_frag_threshold = rdev->wiphy.frag_threshold;
old_rts_threshold = rdev->wiphy.rts_threshold;
old_coverage_class = rdev->wiphy.coverage_class;
if (changed & WIPHY_PARAM_RETRY_SHORT)
rdev->wiphy.retry_short = retry_short;
if (changed & WIPHY_PARAM_RETRY_LONG)
rdev->wiphy.retry_long = retry_long;
if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
rdev->wiphy.frag_threshold = frag_threshold;
if (changed & WIPHY_PARAM_RTS_THRESHOLD)
rdev->wiphy.rts_threshold = rts_threshold;
if (changed & WIPHY_PARAM_COVERAGE_CLASS)
rdev->wiphy.coverage_class = coverage_class;
result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
if (result) {
rdev->wiphy.retry_short = old_retry_short;
rdev->wiphy.retry_long = old_retry_long;
rdev->wiphy.frag_threshold = old_frag_threshold;
rdev->wiphy.rts_threshold = old_rts_threshold;
rdev->wiphy.coverage_class = old_coverage_class;
}
}
bad_res:
mutex_unlock(&rdev->mtx);
unlock:
rtnl_unlock();
return result;
}
static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
struct cfg80211_registered_device *rdev,
struct net_device *dev)
{
void *hdr;
hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
if (!hdr)
return -1;
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
rdev->devlist_generation ^
(cfg80211_rdev_list_generation << 2));
return genlmsg_end(msg, hdr);
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
{
int wp_idx = 0;
int if_idx = 0;
int wp_start = cb->args[0];
int if_start = cb->args[1];
struct cfg80211_registered_device *rdev;
struct wireless_dev *wdev;
mutex_lock(&cfg80211_mutex);
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
continue;
if (wp_idx < wp_start) {
wp_idx++;
continue;
}
if_idx = 0;
mutex_lock(&rdev->devlist_mtx);
list_for_each_entry(wdev, &rdev->netdev_list, list) {
if (if_idx < if_start) {
if_idx++;
continue;
}
if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
rdev, wdev->netdev) < 0) {
mutex_unlock(&rdev->devlist_mtx);
goto out;
}
if_idx++;
}
mutex_unlock(&rdev->devlist_mtx);
wp_idx++;
}
out:
mutex_unlock(&cfg80211_mutex);
cb->args[0] = wp_idx;
cb->args[1] = if_idx;
return skb->len;
}
static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *msg;
struct cfg80211_registered_device *dev;
struct net_device *netdev;
int err;
err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
if (err)
return err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
goto out_err;
if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
dev, netdev) < 0)
goto out_free;
dev_put(netdev);
cfg80211_unlock_rdev(dev);
return genlmsg_reply(msg, info);
out_free:
nlmsg_free(msg);
out_err:
dev_put(netdev);
cfg80211_unlock_rdev(dev);
return -ENOBUFS;
}
static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
[NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
[NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
[NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
[NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
[NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
};
static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
{
struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
int flag;
*mntrflags = 0;
if (!nla)
return -EINVAL;
if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
nla, mntr_flags_policy))
return -EINVAL;
for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
if (flags[flag])
*mntrflags |= (1<<flag);
return 0;
}
static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u8 use_4addr,
enum nl80211_iftype iftype)
{
if (!use_4addr) {
if (netdev && netdev->br_port)
return -EBUSY;
return 0;
}
switch (iftype) {
case NL80211_IFTYPE_AP_VLAN:
if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
return 0;
break;
case NL80211_IFTYPE_STATION:
if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
return 0;
break;
default:
break;
}
return -EOPNOTSUPP;
}
static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct vif_params params;
int err;
enum nl80211_iftype otype, ntype;
struct net_device *dev;
u32 _flags, *flags = NULL;
bool change = false;
memset(&params, 0, sizeof(params));
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
otype = ntype = dev->ieee80211_ptr->iftype;
if (info->attrs[NL80211_ATTR_IFTYPE]) {
ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
if (otype != ntype)
change = true;
if (ntype > NL80211_IFTYPE_MAX) {
err = -EINVAL;
goto unlock;
}
}
if (info->attrs[NL80211_ATTR_MESH_ID]) {
if (ntype != NL80211_IFTYPE_MESH_POINT) {
err = -EINVAL;
goto unlock;
}
params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
change = true;
}
if (info->attrs[NL80211_ATTR_4ADDR]) {
params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
change = true;
err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
if (err)
goto unlock;
} else {
params.use_4addr = -1;
}
if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
if (ntype != NL80211_IFTYPE_MONITOR) {
err = -EINVAL;
goto unlock;
}
err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
&_flags);
if (err)
goto unlock;
flags = &_flags;
change = true;
}
if (change)
err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
else
err = 0;
if (!err && params.use_4addr != -1)
dev->ieee80211_ptr->use_4addr = params.use_4addr;
unlock:
dev_put(dev);
cfg80211_unlock_rdev(rdev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct vif_params params;
int err;
enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
u32 flags;
memset(&params, 0, sizeof(params));
if (!info->attrs[NL80211_ATTR_IFNAME])
return -EINVAL;
if (info->attrs[NL80211_ATTR_IFTYPE]) {
type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
if (type > NL80211_IFTYPE_MAX)
return -EINVAL;
}
rtnl_lock();
rdev = cfg80211_get_dev_from_info(info);
if (IS_ERR(rdev)) {
err = PTR_ERR(rdev);
goto unlock_rtnl;
}
if (!rdev->ops->add_virtual_intf ||
!(rdev->wiphy.interface_modes & (1 << type))) {
err = -EOPNOTSUPP;
goto unlock;
}
if (type == NL80211_IFTYPE_MESH_POINT &&
info->attrs[NL80211_ATTR_MESH_ID]) {
params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
}
if (info->attrs[NL80211_ATTR_4ADDR]) {
params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
if (err)
goto unlock;
}
err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
&flags);
err = rdev->ops->add_virtual_intf(&rdev->wiphy,
nla_data(info->attrs[NL80211_ATTR_IFNAME]),
type, err ? NULL : &flags, &params);
unlock:
cfg80211_unlock_rdev(rdev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->del_virtual_intf) {
err = -EOPNOTSUPP;
goto out;
}
err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
struct get_key_cookie {
struct sk_buff *msg;
int error;
int idx;
};
static void get_key_callback(void *c, struct key_params *params)
{
struct nlattr *key;
struct get_key_cookie *cookie = c;
if (params->key)
NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
params->key_len, params->key);
if (params->seq)
NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
params->seq_len, params->seq);
if (params->cipher)
NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
params->cipher);
key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
if (!key)
goto nla_put_failure;
if (params->key)
NLA_PUT(cookie->msg, NL80211_KEY_DATA,
params->key_len, params->key);
if (params->seq)
NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
params->seq_len, params->seq);
if (params->cipher)
NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
params->cipher);
NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
nla_nest_end(cookie->msg, key);
return;
nla_put_failure:
cookie->error = 1;
}
static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
u8 key_idx = 0;
u8 *mac_addr = NULL;
struct get_key_cookie cookie = {
.error = 0,
};
void *hdr;
struct sk_buff *msg;
if (info->attrs[NL80211_ATTR_KEY_IDX])
key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
if (key_idx > 5)
return -EINVAL;
if (info->attrs[NL80211_ATTR_MAC])
mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->get_key) {
err = -EOPNOTSUPP;
goto out;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
err = -ENOMEM;
goto out;
}
hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
NL80211_CMD_NEW_KEY);
if (IS_ERR(hdr)) {
err = PTR_ERR(hdr);
goto free_msg;
}
cookie.msg = msg;
cookie.idx = key_idx;
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
if (mac_addr)
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
&cookie, get_key_callback);
if (err)
goto free_msg;
if (cookie.error)
goto nla_put_failure;
genlmsg_end(msg, hdr);
err = genlmsg_reply(msg, info);
goto out;
nla_put_failure:
err = -ENOBUFS;
free_msg:
nlmsg_free(msg);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct key_parse key;
int err;
struct net_device *dev;
int (*func)(struct wiphy *wiphy, struct net_device *netdev,
u8 key_index);
err = nl80211_parse_key(info, &key);
if (err)
return err;
if (key.idx < 0)
return -EINVAL;
/* only support setting default key */
if (!key.def && !key.defmgmt)
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (key.def)
func = rdev->ops->set_default_key;
else
func = rdev->ops->set_default_mgmt_key;
if (!func) {
err = -EOPNOTSUPP;
goto out;
}
wdev_lock(dev->ieee80211_ptr);
err = nl80211_key_allowed(dev->ieee80211_ptr);
if (!err)
err = func(&rdev->wiphy, dev, key.idx);
#ifdef CONFIG_CFG80211_WEXT
if (!err) {
if (func == rdev->ops->set_default_key)
dev->ieee80211_ptr->wext.default_key = key.idx;
else
dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
}
#endif
wdev_unlock(dev->ieee80211_ptr);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
struct key_parse key;
u8 *mac_addr = NULL;
err = nl80211_parse_key(info, &key);
if (err)
return err;
if (!key.p.key)
return -EINVAL;
if (info->attrs[NL80211_ATTR_MAC])
mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->add_key) {
err = -EOPNOTSUPP;
goto out;
}
if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
err = -EINVAL;
goto out;
}
wdev_lock(dev->ieee80211_ptr);
err = nl80211_key_allowed(dev->ieee80211_ptr);
if (!err)
err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
mac_addr, &key.p);
wdev_unlock(dev->ieee80211_ptr);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
u8 *mac_addr = NULL;
struct key_parse key;
err = nl80211_parse_key(info, &key);
if (err)
return err;
if (info->attrs[NL80211_ATTR_MAC])
mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->del_key) {
err = -EOPNOTSUPP;
goto out;
}
wdev_lock(dev->ieee80211_ptr);
err = nl80211_key_allowed(dev->ieee80211_ptr);
if (!err)
err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
#ifdef CONFIG_CFG80211_WEXT
if (!err) {
if (key.idx == dev->ieee80211_ptr->wext.default_key)
dev->ieee80211_ptr->wext.default_key = -1;
else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
dev->ieee80211_ptr->wext.default_mgmt_key = -1;
}
#endif
wdev_unlock(dev->ieee80211_ptr);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
{
int (*call)(struct wiphy *wiphy, struct net_device *dev,
struct beacon_parameters *info);
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
struct beacon_parameters params;
int haveinfo = 0;
if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
err = -EOPNOTSUPP;
goto out;
}
switch (info->genlhdr->cmd) {
case NL80211_CMD_NEW_BEACON:
/* these are required for NEW_BEACON */
if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
!info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
!info->attrs[NL80211_ATTR_BEACON_HEAD]) {
err = -EINVAL;
goto out;
}
call = rdev->ops->add_beacon;
break;
case NL80211_CMD_SET_BEACON:
call = rdev->ops->set_beacon;
break;
default:
WARN_ON(1);
err = -EOPNOTSUPP;
goto out;
}
if (!call) {
err = -EOPNOTSUPP;
goto out;
}
memset(&params, 0, sizeof(params));
if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
params.interval =
nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
haveinfo = 1;
}
if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
params.dtim_period =
nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
haveinfo = 1;
}
if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
params.head_len =
nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
haveinfo = 1;
}
if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
params.tail_len =
nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
haveinfo = 1;
}
if (!haveinfo) {
err = -EINVAL;
goto out;
}
err = call(&rdev->wiphy, dev, &params);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->del_beacon) {
err = -EOPNOTSUPP;
goto out;
}
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
err = -EOPNOTSUPP;
goto out;
}
err = rdev->ops->del_beacon(&rdev->wiphy, dev);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
[NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
[NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
[NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
[NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
};
static int parse_station_flags(struct genl_info *info,
struct station_parameters *params)
{
struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
struct nlattr *nla;
int flag;
/*
* Try parsing the new attribute first so userspace
* can specify both for older kernels.
*/
nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
if (nla) {
struct nl80211_sta_flag_update *sta_flags;
sta_flags = nla_data(nla);
params->sta_flags_mask = sta_flags->mask;
params->sta_flags_set = sta_flags->set;
if ((params->sta_flags_mask |
params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
return -EINVAL;
return 0;
}
/* if present, parse the old attribute */
nla = info->attrs[NL80211_ATTR_STA_FLAGS];
if (!nla)
return 0;
if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
nla, sta_flags_policy))
return -EINVAL;
params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
params->sta_flags_mask &= ~1;
for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
if (flags[flag])
params->sta_flags_set |= (1<<flag);
return 0;
}
static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
int flags, struct net_device *dev,
const u8 *mac_addr, struct station_info *sinfo)
{
void *hdr;
struct nlattr *sinfoattr, *txrate;
u16 bitrate;
hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
if (!hdr)
return -1;
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
if (!sinfoattr)
goto nla_put_failure;
if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
sinfo->inactive_time);
if (sinfo->filled & STATION_INFO_RX_BYTES)
NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
sinfo->rx_bytes);
if (sinfo->filled & STATION_INFO_TX_BYTES)
NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
sinfo->tx_bytes);
if (sinfo->filled & STATION_INFO_LLID)
NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
sinfo->llid);
if (sinfo->filled & STATION_INFO_PLID)
NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
sinfo->plid);
if (sinfo->filled & STATION_INFO_PLINK_STATE)
NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
sinfo->plink_state);
if (sinfo->filled & STATION_INFO_SIGNAL)
NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
sinfo->signal);
if (sinfo->filled & STATION_INFO_TX_BITRATE) {
txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
if (!txrate)
goto nla_put_failure;
/* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
if (bitrate > 0)
NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
sinfo->txrate.mcs);
if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
nla_nest_end(msg, txrate);
}
if (sinfo->filled & STATION_INFO_RX_PACKETS)
NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
sinfo->rx_packets);
if (sinfo->filled & STATION_INFO_TX_PACKETS)
NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
sinfo->tx_packets);
nla_nest_end(msg, sinfoattr);
return genlmsg_end(msg, hdr);
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int nl80211_dump_station(struct sk_buff *skb,
struct netlink_callback *cb)
{
struct station_info sinfo;
struct cfg80211_registered_device *dev;
struct net_device *netdev;
u8 mac_addr[ETH_ALEN];
int ifidx = cb->args[0];
int sta_idx = cb->args[1];
int err;
if (!ifidx)
ifidx = nl80211_get_ifidx(cb);
if (ifidx < 0)
return ifidx;
rtnl_lock();
netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
if (!netdev) {
err = -ENODEV;
goto out_rtnl;
}
dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
if (IS_ERR(dev)) {
err = PTR_ERR(dev);
goto out_rtnl;
}
if (!dev->ops->dump_station) {
err = -EOPNOTSUPP;
goto out_err;
}
while (1) {
err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
mac_addr, &sinfo);
if (err == -ENOENT)
break;
if (err)
goto out_err;
if (nl80211_send_station(skb,
NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
netdev, mac_addr,
&sinfo) < 0)
goto out;
sta_idx++;
}
out:
cb->args[1] = sta_idx;
err = skb->len;
out_err:
cfg80211_unlock_rdev(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
struct station_info sinfo;
struct sk_buff *msg;
u8 *mac_addr = NULL;
memset(&sinfo, 0, sizeof(sinfo));
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
if (!rdev->ops->get_station) {
err = -EOPNOTSUPP;
goto out;
}
err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
if (err)
goto out;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
goto out;
if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
dev, mac_addr, &sinfo) < 0)
goto out_free;
err = genlmsg_reply(msg, info);
goto out;
out_free:
nlmsg_free(msg);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
/*
* Get vlan interface making sure it is running and on the right wiphy.
*/
static int get_vlan(struct genl_info *info,
struct cfg80211_registered_device *rdev,
struct net_device **vlan)
{
struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
*vlan = NULL;
if (vlanattr) {
*vlan = dev_get_by_index(genl_info_net(info),
nla_get_u32(vlanattr));
if (!*vlan)
return -ENODEV;
if (!(*vlan)->ieee80211_ptr)
return -EINVAL;
if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
return -EINVAL;
if (!netif_running(*vlan))
return -ENETDOWN;
}
return 0;
}
static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
struct station_parameters params;
u8 *mac_addr = NULL;
memset(&params, 0, sizeof(params));
params.listen_interval = -1;
if (info->attrs[NL80211_ATTR_STA_AID])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
params.supported_rates =
nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
params.supported_rates_len =
nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
}
if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
params.listen_interval =
nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
params.ht_capa =
nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
if (parse_station_flags(info, &params))
return -EINVAL;
if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
params.plink_action =
nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
err = get_vlan(info, rdev, &params.vlan);
if (err)
goto out;
/* validate settings */
err = 0;
switch (dev->ieee80211_ptr->iftype) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_AP_VLAN:
/* disallow mesh-specific things */
if (params.plink_action)
err = -EINVAL;
break;
case NL80211_IFTYPE_STATION:
/* disallow everything but AUTHORIZED flag */
if (params.plink_action)
err = -EINVAL;
if (params.vlan)
err = -EINVAL;
if (params.supported_rates)
err = -EINVAL;
if (params.ht_capa)
err = -EINVAL;
if (params.listen_interval >= 0)
err = -EINVAL;
if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
err = -EINVAL;
break;
case NL80211_IFTYPE_MESH_POINT:
/* disallow things mesh doesn't support */
if (params.vlan)
err = -EINVAL;
if (params.ht_capa)
err = -EINVAL;
if (params.listen_interval >= 0)
err = -EINVAL;
if (params.supported_rates)
err = -EINVAL;
if (params.sta_flags_mask)
err = -EINVAL;
break;
default:
err = -EINVAL;
}
if (err)
goto out;
if (!rdev->ops->change_station) {
err = -EOPNOTSUPP;
goto out;
}
err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
out:
if (params.vlan)
dev_put(params.vlan);
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
struct station_parameters params;
u8 *mac_addr = NULL;
memset(&params, 0, sizeof(params));
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_STA_AID])
return -EINVAL;
mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
params.supported_rates =
nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
params.supported_rates_len =
nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
params.listen_interval =
nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
if (!params.aid || params.aid > IEEE80211_MAX_AID)
return -EINVAL;
if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
params.ht_capa =
nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
if (parse_station_flags(info, &params))
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
err = -EINVAL;
goto out;
}
err = get_vlan(info, rdev, &params.vlan);
if (err)
goto out;
/* validate settings */
err = 0;
if (!rdev->ops->add_station) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
out:
if (params.vlan)
dev_put(params.vlan);
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
u8 *mac_addr = NULL;
if (info->attrs[NL80211_ATTR_MAC])
mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
err = -EINVAL;
goto out;
}
if (!rdev->ops->del_station) {
err = -EOPNOTSUPP;
goto out;
}
err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
int flags, struct net_device *dev,
u8 *dst, u8 *next_hop,
struct mpath_info *pinfo)
{
void *hdr;
struct nlattr *pinfoattr;
hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
if (!hdr)
return -1;
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
if (!pinfoattr)
goto nla_put_failure;
if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
pinfo->frame_qlen);
if (pinfo->filled & MPATH_INFO_SN)
NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
pinfo->sn);
if (pinfo->filled & MPATH_INFO_METRIC)
NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
pinfo->metric);
if (pinfo->filled & MPATH_INFO_EXPTIME)
NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
pinfo->exptime);
if (pinfo->filled & MPATH_INFO_FLAGS)
NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
pinfo->flags);
if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
pinfo->discovery_timeout);
if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
pinfo->discovery_retries);
nla_nest_end(msg, pinfoattr);
return genlmsg_end(msg, hdr);
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int nl80211_dump_mpath(struct sk_buff *skb,
struct netlink_callback *cb)
{
struct mpath_info pinfo;
struct cfg80211_registered_device *dev;
struct net_device *netdev;
u8 dst[ETH_ALEN];
u8 next_hop[ETH_ALEN];
int ifidx = cb->args[0];
int path_idx = cb->args[1];
int err;
if (!ifidx)
ifidx = nl80211_get_ifidx(cb);
if (ifidx < 0)
return ifidx;
rtnl_lock();
netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
if (!netdev) {
err = -ENODEV;
goto out_rtnl;
}
dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
if (IS_ERR(dev)) {
err = PTR_ERR(dev);
goto out_rtnl;
}
if (!dev->ops->dump_mpath) {
err = -EOPNOTSUPP;
goto out_err;
}
if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
err = -EOPNOTSUPP;
goto out_err;
}
while (1) {
err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
dst, next_hop, &pinfo);
if (err == -ENOENT)
break;
if (err)
goto out_err;
if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
netdev, dst, next_hop,
&pinfo) < 0)
goto out;
path_idx++;
}
out:
cb->args[1] = path_idx;
err = skb->len;
out_err:
cfg80211_unlock_rdev(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
struct mpath_info pinfo;
struct sk_buff *msg;
u8 *dst = NULL;
u8 next_hop[ETH_ALEN];
memset(&pinfo, 0, sizeof(pinfo));
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
if (!rdev->ops->get_mpath) {
err = -EOPNOTSUPP;
goto out;
}
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
err = -EOPNOTSUPP;
goto out;
}
err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
if (err)
goto out;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
goto out;
if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
dev, dst, next_hop, &pinfo) < 0)
goto out_free;
err = genlmsg_reply(msg, info);
goto out;
out_free:
nlmsg_free(msg);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
u8 *dst = NULL;
u8 *next_hop = NULL;
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
return -EINVAL;
dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
if (!rdev->ops->change_mpath) {
err = -EOPNOTSUPP;
goto out;
}
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
u8 *dst = NULL;
u8 *next_hop = NULL;
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
return -EINVAL;
dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
if (!rdev->ops->add_mpath) {
err = -EOPNOTSUPP;
goto out;
}
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
u8 *dst = NULL;
if (info->attrs[NL80211_ATTR_MAC])
dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
if (!rdev->ops->del_mpath) {
err = -EOPNOTSUPP;
goto out;
}
err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
struct bss_parameters params;
memset(&params, 0, sizeof(params));
/* default to not changing parameters */
params.use_cts_prot = -1;
params.use_short_preamble = -1;
params.use_short_slot_time = -1;
if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
params.use_cts_prot =
nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
params.use_short_preamble =
nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
params.use_short_slot_time =
nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
params.basic_rates =
nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
params.basic_rates_len =
nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
}
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
if (!rdev->ops->change_bss) {
err = -EOPNOTSUPP;
goto out;
}
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
err = -EOPNOTSUPP;
goto out;
}
err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
[NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
[NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
[NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
[NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
[NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
};
static int parse_reg_rule(struct nlattr *tb[],
struct ieee80211_reg_rule *reg_rule)
{
struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
return -EINVAL;
if (!tb[NL80211_ATTR_FREQ_RANGE_START])
return -EINVAL;
if (!tb[NL80211_ATTR_FREQ_RANGE_END])
return -EINVAL;
if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
return -EINVAL;
if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
return -EINVAL;
reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
freq_range->start_freq_khz =
nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
freq_range->end_freq_khz =
nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
freq_range->max_bandwidth_khz =
nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
power_rule->max_eirp =
nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
power_rule->max_antenna_gain =
nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
return 0;
}
static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
{
int r;
char *data = NULL;
/*
* You should only get this when cfg80211 hasn't yet initialized
* completely when built-in to the kernel right between the time
* window between nl80211_init() and regulatory_init(), if that is
* even possible.
*/
mutex_lock(&cfg80211_mutex);
if (unlikely(!cfg80211_regdomain)) {
mutex_unlock(&cfg80211_mutex);
return -EINPROGRESS;
}
mutex_unlock(&cfg80211_mutex);
if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
return -EINVAL;
data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
r = regulatory_hint_user(data);
return r;
}
static int nl80211_get_mesh_params(struct sk_buff *skb,
struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct mesh_config cur_params;
int err;
struct net_device *dev;
void *hdr;
struct nlattr *pinfoattr;
struct sk_buff *msg;
rtnl_lock();
/* Look up our device */
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
if (!rdev->ops->get_mesh_params) {
err = -EOPNOTSUPP;
goto out;
}
/* Get the mesh params */
err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
if (err)
goto out;
/* Draw up a netlink message to send back */
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
err = -ENOBUFS;
goto out;
}
hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
NL80211_CMD_GET_MESH_PARAMS);
if (!hdr)
goto nla_put_failure;
pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
if (!pinfoattr)
goto nla_put_failure;
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
cur_params.dot11MeshRetryTimeout);
NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
cur_params.dot11MeshConfirmTimeout);
NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
cur_params.dot11MeshHoldingTimeout);
NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
cur_params.dot11MeshMaxPeerLinks);
NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
cur_params.dot11MeshMaxRetries);
NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
cur_params.dot11MeshTTL);
NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
cur_params.auto_open_plinks);
NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
cur_params.dot11MeshHWMPmaxPREQretries);
NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
cur_params.path_refresh_time);
NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
cur_params.min_discovery_timeout);
NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
cur_params.dot11MeshHWMPactivePathTimeout);
NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
cur_params.dot11MeshHWMPpreqMinInterval);
NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
cur_params.dot11MeshHWMPnetDiameterTraversalTime);
NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
cur_params.dot11MeshHWMPRootMode);
nla_nest_end(msg, pinfoattr);
genlmsg_end(msg, hdr);
err = genlmsg_reply(msg, info);
goto out;
nla_put_failure:
genlmsg_cancel(msg, hdr);
err = -EMSGSIZE;
out:
/* Cleanup */
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
#define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
do {\
if (table[attr_num]) {\
cfg.param = nla_fn(table[attr_num]); \
mask |= (1 << (attr_num - 1)); \
} \
} while (0);\
static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
[NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
[NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
[NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
[NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
[NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
[NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
[NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
[NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
[NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
[NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
[NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
[NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
[NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
};
static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
{
int err;
u32 mask;
struct cfg80211_registered_device *rdev;
struct net_device *dev;
struct mesh_config cfg;
struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
struct nlattr *parent_attr;
parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
if (!parent_attr)
return -EINVAL;
if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
parent_attr, nl80211_meshconf_params_policy))
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
if (!rdev->ops->set_mesh_params) {
err = -EOPNOTSUPP;
goto out;
}
/* This makes sure that there aren't more than 32 mesh config
* parameters (otherwise our bitfield scheme would not work.) */
BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
/* Fill in the params struct */
mask = 0;
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
mask, NL80211_MESHCONF_TTL, nla_get_u8);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
nla_get_u8);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
nla_get_u16);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
nla_get_u32);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
nla_get_u16);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
dot11MeshHWMPnetDiameterTraversalTime,
mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
nla_get_u16);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
dot11MeshHWMPRootMode, mask,
NL80211_MESHCONF_HWMP_ROOTMODE,
nla_get_u8);
/* Apply changes */
err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
out:
/* cleanup */
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
#undef FILL_IN_MESH_PARAM_IF_SET
static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *msg;
void *hdr = NULL;
struct nlattr *nl_reg_rules;
unsigned int i;
int err = -EINVAL;
mutex_lock(&cfg80211_mutex);
if (!cfg80211_regdomain)
goto out;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
err = -ENOBUFS;
goto out;
}
hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
NL80211_CMD_GET_REG);
if (!hdr)
goto nla_put_failure;
NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
cfg80211_regdomain->alpha2);
nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
if (!nl_reg_rules)
goto nla_put_failure;
for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
struct nlattr *nl_reg_rule;
const struct ieee80211_reg_rule *reg_rule;
const struct ieee80211_freq_range *freq_range;
const struct ieee80211_power_rule *power_rule;
reg_rule = &cfg80211_regdomain->reg_rules[i];
freq_range = &reg_rule->freq_range;
power_rule = &reg_rule->power_rule;
nl_reg_rule = nla_nest_start(msg, i);
if (!nl_reg_rule)
goto nla_put_failure;
NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
reg_rule->flags);
NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
freq_range->start_freq_khz);
NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
freq_range->end_freq_khz);
NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
freq_range->max_bandwidth_khz);
NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
power_rule->max_antenna_gain);
NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
power_rule->max_eirp);
nla_nest_end(msg, nl_reg_rule);
}
nla_nest_end(msg, nl_reg_rules);
genlmsg_end(msg, hdr);
err = genlmsg_reply(msg, info);
goto out;
nla_put_failure:
genlmsg_cancel(msg, hdr);
err = -EMSGSIZE;
out:
mutex_unlock(&cfg80211_mutex);
return err;
}
static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
struct nlattr *nl_reg_rule;
char *alpha2 = NULL;
int rem_reg_rules = 0, r = 0;
u32 num_rules = 0, rule_idx = 0, size_of_regd;
struct ieee80211_regdomain *rd = NULL;
if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_REG_RULES])
return -EINVAL;
alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
rem_reg_rules) {
num_rules++;
if (num_rules > NL80211_MAX_SUPP_REG_RULES)
return -EINVAL;
}
mutex_lock(&cfg80211_mutex);
if (!reg_is_valid_request(alpha2)) {
r = -EINVAL;
goto bad_reg;
}
size_of_regd = sizeof(struct ieee80211_regdomain) +
(num_rules * sizeof(struct ieee80211_reg_rule));
rd = kzalloc(size_of_regd, GFP_KERNEL);
if (!rd) {
r = -ENOMEM;
goto bad_reg;
}
rd->n_reg_rules = num_rules;
rd->alpha2[0] = alpha2[0];
rd->alpha2[1] = alpha2[1];
nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
rem_reg_rules) {
nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
nla_data(nl_reg_rule), nla_len(nl_reg_rule),
reg_rule_policy);
r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
if (r)
goto bad_reg;
rule_idx++;
if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
r = -EINVAL;
goto bad_reg;
}
}
BUG_ON(rule_idx != num_rules);
r = set_regdom(rd);
mutex_unlock(&cfg80211_mutex);
return r;
bad_reg:
mutex_unlock(&cfg80211_mutex);
kfree(rd);
return r;
}
static int validate_scan_freqs(struct nlattr *freqs)
{
struct nlattr *attr1, *attr2;
int n_channels = 0, tmp1, tmp2;
nla_for_each_nested(attr1, freqs, tmp1) {
n_channels++;
/*
* Some hardware has a limited channel list for
* scanning, and it is pretty much nonsensical
* to scan for a channel twice, so disallow that
* and don't require drivers to check that the
* channel list they get isn't longer than what
* they can scan, as long as they can scan all
* the channels they registered at once.
*/
nla_for_each_nested(attr2, freqs, tmp2)
if (attr1 != attr2 &&
nla_get_u32(attr1) == nla_get_u32(attr2))
return 0;
}
return n_channels;
}
static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
struct cfg80211_scan_request *request;
struct cfg80211_ssid *ssid;
struct ieee80211_channel *channel;
struct nlattr *attr;
struct wiphy *wiphy;
int err, tmp, n_ssids = 0, n_channels, i;
enum ieee80211_band band;
size_t ie_len;
if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
wiphy = &rdev->wiphy;
if (!rdev->ops->scan) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
if (rdev->scan_req) {
err = -EBUSY;
goto out;
}
if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
n_channels = validate_scan_freqs(
info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
if (!n_channels) {
err = -EINVAL;
goto out;
}
} else {
n_channels = 0;
for (band = 0; band < IEEE80211_NUM_BANDS; band++)
if (wiphy->bands[band])
n_channels += wiphy->bands[band]->n_channels;
}
if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
n_ssids++;
if (n_ssids > wiphy->max_scan_ssids) {
err = -EINVAL;
goto out;
}
if (info->attrs[NL80211_ATTR_IE])
ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
else
ie_len = 0;
if (ie_len > wiphy->max_scan_ie_len) {
err = -EINVAL;
goto out;
}
request = kzalloc(sizeof(*request)
+ sizeof(*ssid) * n_ssids
+ sizeof(channel) * n_channels
+ ie_len, GFP_KERNEL);
if (!request) {
err = -ENOMEM;
goto out;
}
if (n_ssids)
request->ssids = (void *)&request->channels[n_channels];
request->n_ssids = n_ssids;
if (ie_len) {
if (request->ssids)
request->ie = (void *)(request->ssids + n_ssids);
else
request->ie = (void *)(request->channels + n_channels);
}
i = 0;
if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
/* user specified, bail out if channel not found */
nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
struct ieee80211_channel *chan;
chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
if (!chan) {
err = -EINVAL;
goto out_free;
}
/* ignore disabled channels */
if (chan->flags & IEEE80211_CHAN_DISABLED)
continue;
request->channels[i] = chan;
i++;
}
} else {
/* all channels */
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
int j;
if (!wiphy->bands[band])
continue;
for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
struct ieee80211_channel *chan;
chan = &wiphy->bands[band]->channels[j];
if (chan->flags & IEEE80211_CHAN_DISABLED)
continue;
request->channels[i] = chan;
i++;
}
}
}
if (!i) {
err = -EINVAL;
goto out_free;
}
request->n_channels = i;
i = 0;
if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
err = -EINVAL;
goto out_free;
}
memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
request->ssids[i].ssid_len = nla_len(attr);
i++;
}
}
if (info->attrs[NL80211_ATTR_IE]) {
request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
memcpy((void *)request->ie,
nla_data(info->attrs[NL80211_ATTR_IE]),
request->ie_len);
}
request->dev = dev;
request->wiphy = &rdev->wiphy;
rdev->scan_req = request;
err = rdev->ops->scan(&rdev->wiphy, dev, request);
if (!err) {
nl80211_send_scan_start(rdev, dev);
dev_hold(dev);
}
out_free:
if (err) {
rdev->scan_req = NULL;
kfree(request);
}
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
struct cfg80211_internal_bss *intbss)
{
struct cfg80211_bss *res = &intbss->pub;
void *hdr;
struct nlattr *bss;
int i;
ASSERT_WDEV_LOCK(wdev);
hdr = nl80211hdr_put(msg, pid, seq, flags,
NL80211_CMD_NEW_SCAN_RESULTS);
if (!hdr)
return -1;
NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
bss = nla_nest_start(msg, NL80211_ATTR_BSS);
if (!bss)
goto nla_put_failure;
if (!is_zero_ether_addr(res->bssid))
NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
if (res->information_elements && res->len_information_elements)
NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
res->len_information_elements,
res->information_elements);
if (res->beacon_ies && res->len_beacon_ies &&
res->beacon_ies != res->information_elements)
NLA_PUT(msg, NL80211_BSS_BEACON_IES,
res->len_beacon_ies, res->beacon_ies);
if (res->tsf)
NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
if (res->beacon_interval)
NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
jiffies_to_msecs(jiffies - intbss->ts));
switch (rdev->wiphy.signal_type) {
case CFG80211_SIGNAL_TYPE_MBM:
NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
break;
case CFG80211_SIGNAL_TYPE_UNSPEC:
NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
break;
default:
break;
}
switch (wdev->iftype) {
case NL80211_IFTYPE_STATION:
if (intbss == wdev->current_bss)
NLA_PUT_U32(msg, NL80211_BSS_STATUS,
NL80211_BSS_STATUS_ASSOCIATED);
else for (i = 0; i < MAX_AUTH_BSSES; i++) {
if (intbss != wdev->auth_bsses[i])
continue;
NLA_PUT_U32(msg, NL80211_BSS_STATUS,
NL80211_BSS_STATUS_AUTHENTICATED);
break;
}
break;
case NL80211_IFTYPE_ADHOC:
if (intbss == wdev->current_bss)
NLA_PUT_U32(msg, NL80211_BSS_STATUS,
NL80211_BSS_STATUS_IBSS_JOINED);
break;
default:
break;
}
nla_nest_end(msg, bss);
return genlmsg_end(msg, hdr);
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int nl80211_dump_scan(struct sk_buff *skb,
struct netlink_callback *cb)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
struct cfg80211_internal_bss *scan;
struct wireless_dev *wdev;
int ifidx = cb->args[0];
int start = cb->args[1], idx = 0;
int err;
if (!ifidx)
ifidx = nl80211_get_ifidx(cb);
if (ifidx < 0)
return ifidx;
cb->args[0] = ifidx;
dev = dev_get_by_index(sock_net(skb->sk), ifidx);
if (!dev)
return -ENODEV;
rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
if (IS_ERR(rdev)) {
err = PTR_ERR(rdev);
goto out_put_netdev;
}
wdev = dev->ieee80211_ptr;
wdev_lock(wdev);
spin_lock_bh(&rdev->bss_lock);
cfg80211_bss_expire(rdev);
list_for_each_entry(scan, &rdev->bss_list, list) {
if (++idx <= start)
continue;
if (nl80211_send_bss(skb,
NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
rdev, wdev, scan) < 0) {
idx--;
goto out;
}
}
out:
spin_unlock_bh(&rdev->bss_lock);
wdev_unlock(wdev);
cb->args[1] = idx;
err = skb->len;
cfg80211_unlock_rdev(rdev);
out_put_netdev:
dev_put(dev);
return err;
}
static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
int flags, struct net_device *dev,
struct survey_info *survey)
{
void *hdr;
struct nlattr *infoattr;
/* Survey without a channel doesn't make sense */
if (!survey->channel)
return -EINVAL;
hdr = nl80211hdr_put(msg, pid, seq, flags,
NL80211_CMD_NEW_SURVEY_RESULTS);
if (!hdr)
return -ENOMEM;
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
if (!infoattr)
goto nla_put_failure;
NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
survey->channel->center_freq);
if (survey->filled & SURVEY_INFO_NOISE_DBM)
NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
survey->noise);
nla_nest_end(msg, infoattr);
return genlmsg_end(msg, hdr);
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int nl80211_dump_survey(struct sk_buff *skb,
struct netlink_callback *cb)
{
struct survey_info survey;
struct cfg80211_registered_device *dev;
struct net_device *netdev;
int ifidx = cb->args[0];
int survey_idx = cb->args[1];
int res;
if (!ifidx)
ifidx = nl80211_get_ifidx(cb);
if (ifidx < 0)
return ifidx;
cb->args[0] = ifidx;
rtnl_lock();
netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
if (!netdev) {
res = -ENODEV;
goto out_rtnl;
}
dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
if (IS_ERR(dev)) {
res = PTR_ERR(dev);
goto out_rtnl;
}
if (!dev->ops->dump_survey) {
res = -EOPNOTSUPP;
goto out_err;
}
while (1) {
res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
&survey);
if (res == -ENOENT)
break;
if (res)
goto out_err;
if (nl80211_send_survey(skb,
NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
netdev,
&survey) < 0)
goto out;
survey_idx++;
}
out:
cb->args[1] = survey_idx;
res = skb->len;
out_err:
cfg80211_unlock_rdev(dev);
out_rtnl:
rtnl_unlock();
return res;
}
static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
{
return auth_type <= NL80211_AUTHTYPE_MAX;
}
static bool nl80211_valid_wpa_versions(u32 wpa_versions)
{
return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
NL80211_WPA_VERSION_2));
}
static bool nl80211_valid_akm_suite(u32 akm)
{
return akm == WLAN_AKM_SUITE_8021X ||
akm == WLAN_AKM_SUITE_PSK;
}
static bool nl80211_valid_cipher_suite(u32 cipher)
{
return cipher == WLAN_CIPHER_SUITE_WEP40 ||
cipher == WLAN_CIPHER_SUITE_WEP104 ||
cipher == WLAN_CIPHER_SUITE_TKIP ||
cipher == WLAN_CIPHER_SUITE_CCMP ||
cipher == WLAN_CIPHER_SUITE_AES_CMAC;
}
static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
struct ieee80211_channel *chan;
const u8 *bssid, *ssid, *ie = NULL;
int err, ssid_len, ie_len = 0;
enum nl80211_auth_type auth_type;
struct key_parse key;
if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
return -EINVAL;
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_SSID])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
return -EINVAL;
err = nl80211_parse_key(info, &key);
if (err)
return err;
if (key.idx >= 0) {
if (!key.p.key || !key.p.key_len)
return -EINVAL;
if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
key.p.key_len != WLAN_KEY_LEN_WEP40) &&
(key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
key.p.key_len != WLAN_KEY_LEN_WEP104))
return -EINVAL;
if (key.idx > 4)
return -EINVAL;
} else {
key.p.key_len = 0;
key.p.key = NULL;
}
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->auth) {
err = -EOPNOTSUPP;
goto out;
}
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
chan = ieee80211_get_channel(&rdev->wiphy,
nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
err = -EINVAL;
goto out;
}
ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
if (info->attrs[NL80211_ATTR_IE]) {
ie = nla_data(info->attrs[NL80211_ATTR_IE]);
ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
}
auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
if (!nl80211_valid_auth_type(auth_type)) {
err = -EINVAL;
goto out;
}
err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
ssid, ssid_len, ie, ie_len,
key.p.key, key.p.key_len, key.idx);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_crypto_settings(struct genl_info *info,
struct cfg80211_crypto_settings *settings,
int cipher_limit)
{
memset(settings, 0, sizeof(*settings));
settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
void *data;
int len, i;
data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
settings->n_ciphers_pairwise = len / sizeof(u32);
if (len % sizeof(u32))
return -EINVAL;
if (settings->n_ciphers_pairwise > cipher_limit)
return -EINVAL;
memcpy(settings->ciphers_pairwise, data, len);
for (i = 0; i < settings->n_ciphers_pairwise; i++)
if (!nl80211_valid_cipher_suite(
settings->ciphers_pairwise[i]))
return -EINVAL;
}
if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
settings->cipher_group =
nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
if (!nl80211_valid_cipher_suite(settings->cipher_group))
return -EINVAL;
}
if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
settings->wpa_versions =
nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
if (!nl80211_valid_wpa_versions(settings->wpa_versions))
return -EINVAL;
}
if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
void *data;
int len, i;
data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
settings->n_akm_suites = len / sizeof(u32);
if (len % sizeof(u32))
return -EINVAL;
memcpy(settings->akm_suites, data, len);
for (i = 0; i < settings->n_ciphers_pairwise; i++)
if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
return -EINVAL;
}
return 0;
}
static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
struct wireless_dev *wdev;
struct cfg80211_crypto_settings crypto;
struct ieee80211_channel *chan, *fixedchan;
const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
int err, ssid_len, ie_len = 0;
bool use_mfp = false;
if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
return -EINVAL;
if (!info->attrs[NL80211_ATTR_MAC] ||
!info->attrs[NL80211_ATTR_SSID] ||
!info->attrs[NL80211_ATTR_WIPHY_FREQ])
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->assoc) {
err = -EOPNOTSUPP;
goto out;
}
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
chan = ieee80211_get_channel(&rdev->wiphy,
nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
err = -EINVAL;
goto out;
}
mutex_lock(&rdev->devlist_mtx);
wdev = dev->ieee80211_ptr;
fixedchan = rdev_fixed_channel(rdev, wdev);
if (fixedchan && chan != fixedchan) {
err = -EBUSY;
mutex_unlock(&rdev->devlist_mtx);
goto out;
}
mutex_unlock(&rdev->devlist_mtx);
ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
if (info->attrs[NL80211_ATTR_IE]) {
ie = nla_data(info->attrs[NL80211_ATTR_IE]);
ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
}
if (info->attrs[NL80211_ATTR_USE_MFP]) {
enum nl80211_mfp mfp =
nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
if (mfp == NL80211_MFP_REQUIRED)
use_mfp = true;
else if (mfp != NL80211_MFP_NO) {
err = -EINVAL;
goto out;
}
}
if (info->attrs[NL80211_ATTR_PREV_BSSID])
prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
err = nl80211_crypto_settings(info, &crypto, 1);
if (!err)
err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
ssid, ssid_len, ie, ie_len, use_mfp,
&crypto);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
const u8 *ie = NULL, *bssid;
int err, ie_len = 0;
u16 reason_code;
if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
return -EINVAL;
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_REASON_CODE])
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->deauth) {
err = -EOPNOTSUPP;
goto out;
}
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
if (reason_code == 0) {
/* Reason Code 0 is reserved */
err = -EINVAL;
goto out;
}
if (info->attrs[NL80211_ATTR_IE]) {
ie = nla_data(info->attrs[NL80211_ATTR_IE]);
ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
}
err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
const u8 *ie = NULL, *bssid;
int err, ie_len = 0;
u16 reason_code;
if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
return -EINVAL;
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_REASON_CODE])
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->disassoc) {
err = -EOPNOTSUPP;
goto out;
}
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
if (reason_code == 0) {
/* Reason Code 0 is reserved */
err = -EINVAL;
goto out;
}
if (info->attrs[NL80211_ATTR_IE]) {
ie = nla_data(info->attrs[NL80211_ATTR_IE]);
ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
}
err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
struct cfg80211_ibss_params ibss;
struct wiphy *wiphy;
struct cfg80211_cached_keys *connkeys = NULL;
int err;
memset(&ibss, 0, sizeof(ibss));
if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
return -EINVAL;
if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
!info->attrs[NL80211_ATTR_SSID] ||
!nla_len(info->attrs[NL80211_ATTR_SSID]))
return -EINVAL;
ibss.beacon_interval = 100;
if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
ibss.beacon_interval =
nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
return -EINVAL;
}
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->join_ibss) {
err = -EOPNOTSUPP;
goto out;
}
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
wiphy = &rdev->wiphy;
if (info->attrs[NL80211_ATTR_MAC])
ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
if (info->attrs[NL80211_ATTR_IE]) {
ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
}
ibss.channel = ieee80211_get_channel(wiphy,
nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
if (!ibss.channel ||
ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
err = -EINVAL;
goto out;
}
ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
connkeys = nl80211_parse_connkeys(rdev,
info->attrs[NL80211_ATTR_KEYS]);
if (IS_ERR(connkeys)) {
err = PTR_ERR(connkeys);
connkeys = NULL;
goto out;
}
}
err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
if (err)
kfree(connkeys);
rtnl_unlock();
return err;
}
static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
int err;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->leave_ibss) {
err = -EOPNOTSUPP;
goto out;
}
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
err = cfg80211_leave_ibss(rdev, dev, false);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
#ifdef CONFIG_NL80211_TESTMODE
static struct genl_multicast_group nl80211_testmode_mcgrp = {
.name = "testmode",
};
static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
if (!info->attrs[NL80211_ATTR_TESTDATA])
return -EINVAL;
rtnl_lock();
rdev = cfg80211_get_dev_from_info(info);
if (IS_ERR(rdev)) {
err = PTR_ERR(rdev);
goto unlock_rtnl;
}
err = -EOPNOTSUPP;
if (rdev->ops->testmode_cmd) {
rdev->testmode_info = info;
err = rdev->ops->testmode_cmd(&rdev->wiphy,
nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
rdev->testmode_info = NULL;
}
cfg80211_unlock_rdev(rdev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static struct sk_buff *
__cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
int approxlen, u32 pid, u32 seq, gfp_t gfp)
{
struct sk_buff *skb;
void *hdr;
struct nlattr *data;
skb = nlmsg_new(approxlen + 100, gfp);
if (!skb)
return NULL;
hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
if (!hdr) {
kfree_skb(skb);
return NULL;
}
NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
((void **)skb->cb)[0] = rdev;
((void **)skb->cb)[1] = hdr;
((void **)skb->cb)[2] = data;
return skb;
nla_put_failure:
kfree_skb(skb);
return NULL;
}
struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
int approxlen)
{
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
if (WARN_ON(!rdev->testmode_info))
return NULL;
return __cfg80211_testmode_alloc_skb(rdev, approxlen,
rdev->testmode_info->snd_pid,
rdev->testmode_info->snd_seq,
GFP_KERNEL);
}
EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
int cfg80211_testmode_reply(struct sk_buff *skb)
{
struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
void *hdr = ((void **)skb->cb)[1];
struct nlattr *data = ((void **)skb->cb)[2];
if (WARN_ON(!rdev->testmode_info)) {
kfree_skb(skb);
return -EINVAL;
}
nla_nest_end(skb, data);
genlmsg_end(skb, hdr);
return genlmsg_reply(skb, rdev->testmode_info);
}
EXPORT_SYMBOL(cfg80211_testmode_reply);
struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
int approxlen, gfp_t gfp)
{
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
}
EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
{
void *hdr = ((void **)skb->cb)[1];
struct nlattr *data = ((void **)skb->cb)[2];
nla_nest_end(skb, data);
genlmsg_end(skb, hdr);
genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
}
EXPORT_SYMBOL(cfg80211_testmode_event);
#endif
static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
struct cfg80211_connect_params connect;
struct wiphy *wiphy;
struct cfg80211_cached_keys *connkeys = NULL;
int err;
memset(&connect, 0, sizeof(connect));
if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
return -EINVAL;
if (!info->attrs[NL80211_ATTR_SSID] ||
!nla_len(info->attrs[NL80211_ATTR_SSID]))
return -EINVAL;
if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
connect.auth_type =
nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
if (!nl80211_valid_auth_type(connect.auth_type))
return -EINVAL;
} else
connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
err = nl80211_crypto_settings(info, &connect.crypto,
NL80211_MAX_NR_CIPHER_SUITES);
if (err)
return err;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
wiphy = &rdev->wiphy;
if (info->attrs[NL80211_ATTR_MAC])
connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
if (info->attrs[NL80211_ATTR_IE]) {
connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
}
if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
connect.channel =
ieee80211_get_channel(wiphy,
nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
if (!connect.channel ||
connect.channel->flags & IEEE80211_CHAN_DISABLED) {
err = -EINVAL;
goto out;
}
}
if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
connkeys = nl80211_parse_connkeys(rdev,
info->attrs[NL80211_ATTR_KEYS]);
if (IS_ERR(connkeys)) {
err = PTR_ERR(connkeys);
connkeys = NULL;
goto out;
}
}
err = cfg80211_connect(rdev, dev, &connect, connkeys);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
if (err)
kfree(connkeys);
rtnl_unlock();
return err;
}
static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
int err;
u16 reason;
if (!info->attrs[NL80211_ATTR_REASON_CODE])
reason = WLAN_REASON_DEAUTH_LEAVING;
else
reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
if (reason == 0)
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
err = cfg80211_disconnect(rdev, dev, reason, true);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net *net;
int err;
u32 pid;
if (!info->attrs[NL80211_ATTR_PID])
return -EINVAL;
pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
rtnl_lock();
rdev = cfg80211_get_dev_from_info(info);
if (IS_ERR(rdev)) {
err = PTR_ERR(rdev);
goto out_rtnl;
}
net = get_net_ns_by_pid(pid);
if (IS_ERR(net)) {
err = PTR_ERR(net);
goto out;
}
err = 0;
/* check if anything to do */
if (net_eq(wiphy_net(&rdev->wiphy), net))
goto out_put_net;
err = cfg80211_switch_netns(rdev, net);
out_put_net:
put_net(net);
out:
cfg80211_unlock_rdev(rdev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_pmksa *pmksa) = NULL;
int err;
struct net_device *dev;
struct cfg80211_pmksa pmksa;
memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
if (!info->attrs[NL80211_ATTR_PMKID])
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
err = -EOPNOTSUPP;
goto out;
}
switch (info->genlhdr->cmd) {
case NL80211_CMD_SET_PMKSA:
rdev_ops = rdev->ops->set_pmksa;
break;
case NL80211_CMD_DEL_PMKSA:
rdev_ops = rdev->ops->del_pmksa;
break;
default:
WARN_ON(1);
break;
}
if (!rdev_ops) {
err = -EOPNOTSUPP;
goto out;
}
err = rdev_ops(&rdev->wiphy, dev, &pmksa);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto out_rtnl;
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
err = -EOPNOTSUPP;
goto out;
}
if (!rdev->ops->flush_pmksa) {
err = -EOPNOTSUPP;
goto out;
}
err = rdev->ops->flush_pmksa(&rdev->wiphy, dev);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
out_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_remain_on_channel(struct sk_buff *skb,
struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
struct ieee80211_channel *chan;
struct sk_buff *msg;
void *hdr;
u64 cookie;
enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
u32 freq, duration;
int err;
if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
!info->attrs[NL80211_ATTR_DURATION])
return -EINVAL;
duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
/*
* We should be on that channel for at least one jiffie,
* and more than 5 seconds seems excessive.
*/
if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->remain_on_channel) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
channel_type = nla_get_u32(
info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
if (channel_type != NL80211_CHAN_NO_HT &&
channel_type != NL80211_CHAN_HT20 &&
channel_type != NL80211_CHAN_HT40PLUS &&
channel_type != NL80211_CHAN_HT40MINUS)
err = -EINVAL;
goto out;
}
freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
chan = rdev_freq_to_chan(rdev, freq, channel_type);
if (chan == NULL) {
err = -EINVAL;
goto out;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
err = -ENOMEM;
goto out;
}
hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
NL80211_CMD_REMAIN_ON_CHANNEL);
if (IS_ERR(hdr)) {
err = PTR_ERR(hdr);
goto free_msg;
}
err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
channel_type, duration, &cookie);
if (err)
goto free_msg;
NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
genlmsg_end(msg, hdr);
err = genlmsg_reply(msg, info);
goto out;
nla_put_failure:
err = -ENOBUFS;
free_msg:
nlmsg_free(msg);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
u64 cookie;
int err;
if (!info->attrs[NL80211_ATTR_COOKIE])
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->cancel_remain_on_channel) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
u8 *rates, u8 rates_len)
{
u8 i;
u32 mask = 0;
for (i = 0; i < rates_len; i++) {
int rate = (rates[i] & 0x7f) * 5;
int ridx;
for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
struct ieee80211_rate *srate =
&sband->bitrates[ridx];
if (rate == srate->bitrate) {
mask |= 1 << ridx;
break;
}
}
if (ridx == sband->n_bitrates)
return 0; /* rate not found */
}
return mask;
}
static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
[NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
.len = NL80211_MAX_SUPP_RATES },
};
static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
struct genl_info *info)
{
struct nlattr *tb[NL80211_TXRATE_MAX + 1];
struct cfg80211_registered_device *rdev;
struct cfg80211_bitrate_mask mask;
int err, rem, i;
struct net_device *dev;
struct nlattr *tx_rates;
struct ieee80211_supported_band *sband;
if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->set_bitrate_mask) {
err = -EOPNOTSUPP;
goto unlock;
}
memset(&mask, 0, sizeof(mask));
/* Default to all rates enabled */
for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
sband = rdev->wiphy.bands[i];
mask.control[i].legacy =
sband ? (1 << sband->n_bitrates) - 1 : 0;
}
/*
* The nested attribute uses enum nl80211_band as the index. This maps
* directly to the enum ieee80211_band values used in cfg80211.
*/
nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
{
enum ieee80211_band band = nla_type(tx_rates);
if (band < 0 || band >= IEEE80211_NUM_BANDS) {
err = -EINVAL;
goto unlock;
}
sband = rdev->wiphy.bands[band];
if (sband == NULL) {
err = -EINVAL;
goto unlock;
}
nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
nla_len(tx_rates), nl80211_txattr_policy);
if (tb[NL80211_TXRATE_LEGACY]) {
mask.control[band].legacy = rateset_to_mask(
sband,
nla_data(tb[NL80211_TXRATE_LEGACY]),
nla_len(tb[NL80211_TXRATE_LEGACY]));
if (mask.control[band].legacy == 0) {
err = -EINVAL;
goto unlock;
}
}
}
err = rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
unlock:
dev_put(dev);
cfg80211_unlock_rdev(rdev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_register_action(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
int err;
if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
return -EINVAL;
if (nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]) < 1)
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
err = -EOPNOTSUPP;
goto out;
}
/* not much point in registering if we can't reply */
if (!rdev->ops->action) {
err = -EOPNOTSUPP;
goto out;
}
err = cfg80211_mlme_register_action(dev->ieee80211_ptr, info->snd_pid,
nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_action(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
struct ieee80211_channel *chan;
enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
u32 freq;
int err;
void *hdr;
u64 cookie;
struct sk_buff *msg;
if (!info->attrs[NL80211_ATTR_FRAME] ||
!info->attrs[NL80211_ATTR_WIPHY_FREQ])
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
if (!rdev->ops->action) {
err = -EOPNOTSUPP;
goto out;
}
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
err = -EOPNOTSUPP;
goto out;
}
if (!netif_running(dev)) {
err = -ENETDOWN;
goto out;
}
if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
channel_type = nla_get_u32(
info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
if (channel_type != NL80211_CHAN_NO_HT &&
channel_type != NL80211_CHAN_HT20 &&
channel_type != NL80211_CHAN_HT40PLUS &&
channel_type != NL80211_CHAN_HT40MINUS)
err = -EINVAL;
goto out;
}
freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
chan = rdev_freq_to_chan(rdev, freq, channel_type);
if (chan == NULL) {
err = -EINVAL;
goto out;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
err = -ENOMEM;
goto out;
}
hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
NL80211_CMD_ACTION);
if (IS_ERR(hdr)) {
err = PTR_ERR(hdr);
goto free_msg;
}
err = cfg80211_mlme_action(rdev, dev, chan, channel_type,
nla_data(info->attrs[NL80211_ATTR_FRAME]),
nla_len(info->attrs[NL80211_ATTR_FRAME]),
&cookie);
if (err)
goto free_msg;
NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
genlmsg_end(msg, hdr);
err = genlmsg_reply(msg, info);
goto out;
nla_put_failure:
err = -ENOBUFS;
free_msg:
nlmsg_free(msg);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct wireless_dev *wdev;
struct net_device *dev;
u8 ps_state;
bool state;
int err;
if (!info->attrs[NL80211_ATTR_PS_STATE]) {
err = -EINVAL;
goto out;
}
ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED) {
err = -EINVAL;
goto out;
}
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rdev;
wdev = dev->ieee80211_ptr;
if (!rdev->ops->set_power_mgmt) {
err = -EOPNOTSUPP;
goto unlock_rdev;
}
state = (ps_state == NL80211_PS_ENABLED) ? true : false;
if (state == wdev->ps)
goto unlock_rdev;
wdev->ps = state;
if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, wdev->ps,
wdev->ps_timeout))
/* assume this means it's off */
wdev->ps = false;
unlock_rdev:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
rtnl_unlock();
out:
return err;
}
static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
enum nl80211_ps_state ps_state;
struct wireless_dev *wdev;
struct net_device *dev;
struct sk_buff *msg;
void *hdr;
int err;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rtnl;
wdev = dev->ieee80211_ptr;
if (!rdev->ops->set_power_mgmt) {
err = -EOPNOTSUPP;
goto out;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
err = -ENOMEM;
goto out;
}
hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
NL80211_CMD_GET_POWER_SAVE);
if (!hdr) {
err = -ENOMEM;
goto free_msg;
}
if (wdev->ps)
ps_state = NL80211_PS_ENABLED;
else
ps_state = NL80211_PS_DISABLED;
NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
genlmsg_end(msg, hdr);
err = genlmsg_reply(msg, info);
goto out;
nla_put_failure:
err = -ENOBUFS;
free_msg:
nlmsg_free(msg);
out:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
unlock_rtnl:
rtnl_unlock();
return err;
}
static struct nla_policy
nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
[NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
[NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
};
static int nl80211_set_cqm_rssi(struct genl_info *info,
s32 threshold, u32 hysteresis)
{
struct cfg80211_registered_device *rdev;
struct wireless_dev *wdev;
struct net_device *dev;
int err;
if (threshold > 0)
return -EINVAL;
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
if (err)
goto unlock_rdev;
wdev = dev->ieee80211_ptr;
if (!rdev->ops->set_cqm_rssi_config) {
err = -EOPNOTSUPP;
goto unlock_rdev;
}
if (wdev->iftype != NL80211_IFTYPE_STATION) {
err = -EOPNOTSUPP;
goto unlock_rdev;
}
err = rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
threshold, hysteresis);
unlock_rdev:
cfg80211_unlock_rdev(rdev);
dev_put(dev);
rtnl_unlock();
return err;
}
static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
struct nlattr *cqm;
int err;
cqm = info->attrs[NL80211_ATTR_CQM];
if (!cqm) {
err = -EINVAL;
goto out;
}
err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
nl80211_attr_cqm_policy);
if (err)
goto out;
if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
s32 threshold;
u32 hysteresis;
threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
} else
err = -EINVAL;
out:
return err;
}
static struct genl_ops nl80211_ops[] = {
{
.cmd = NL80211_CMD_GET_WIPHY,
.doit = nl80211_get_wiphy,
.dumpit = nl80211_dump_wiphy,
.policy = nl80211_policy,
/* can be retrieved by unprivileged users */
},
{
.cmd = NL80211_CMD_SET_WIPHY,
.doit = nl80211_set_wiphy,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_GET_INTERFACE,
.doit = nl80211_get_interface,
.dumpit = nl80211_dump_interface,
.policy = nl80211_policy,
/* can be retrieved by unprivileged users */
},
{
.cmd = NL80211_CMD_SET_INTERFACE,
.doit = nl80211_set_interface,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_NEW_INTERFACE,
.doit = nl80211_new_interface,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_DEL_INTERFACE,
.doit = nl80211_del_interface,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_GET_KEY,
.doit = nl80211_get_key,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_SET_KEY,
.doit = nl80211_set_key,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_NEW_KEY,
.doit = nl80211_new_key,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_DEL_KEY,
.doit = nl80211_del_key,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_SET_BEACON,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
.doit = nl80211_addset_beacon,
},
{
.cmd = NL80211_CMD_NEW_BEACON,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
.doit = nl80211_addset_beacon,
},
{
.cmd = NL80211_CMD_DEL_BEACON,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
.doit = nl80211_del_beacon,
},
{
.cmd = NL80211_CMD_GET_STATION,
.doit = nl80211_get_station,
.dumpit = nl80211_dump_station,
.policy = nl80211_policy,
},
{
.cmd = NL80211_CMD_SET_STATION,
.doit = nl80211_set_station,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_NEW_STATION,
.doit = nl80211_new_station,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_DEL_STATION,
.doit = nl80211_del_station,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_GET_MPATH,
.doit = nl80211_get_mpath,
.dumpit = nl80211_dump_mpath,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_SET_MPATH,
.doit = nl80211_set_mpath,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_NEW_MPATH,
.doit = nl80211_new_mpath,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_DEL_MPATH,
.doit = nl80211_del_mpath,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_SET_BSS,
.doit = nl80211_set_bss,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_GET_REG,
.doit = nl80211_get_reg,
.policy = nl80211_policy,
/* can be retrieved by unprivileged users */
},
{
.cmd = NL80211_CMD_SET_REG,
.doit = nl80211_set_reg,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_REQ_SET_REG,
.doit = nl80211_req_set_reg,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_GET_MESH_PARAMS,
.doit = nl80211_get_mesh_params,
.policy = nl80211_policy,
/* can be retrieved by unprivileged users */
},
{
.cmd = NL80211_CMD_SET_MESH_PARAMS,
.doit = nl80211_set_mesh_params,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_TRIGGER_SCAN,
.doit = nl80211_trigger_scan,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_GET_SCAN,
.policy = nl80211_policy,
.dumpit = nl80211_dump_scan,
},
{
.cmd = NL80211_CMD_AUTHENTICATE,
.doit = nl80211_authenticate,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_ASSOCIATE,
.doit = nl80211_associate,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_DEAUTHENTICATE,
.doit = nl80211_deauthenticate,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_DISASSOCIATE,
.doit = nl80211_disassociate,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_JOIN_IBSS,
.doit = nl80211_join_ibss,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_LEAVE_IBSS,
.doit = nl80211_leave_ibss,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
#ifdef CONFIG_NL80211_TESTMODE
{
.cmd = NL80211_CMD_TESTMODE,
.doit = nl80211_testmode_do,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
#endif
{
.cmd = NL80211_CMD_CONNECT,
.doit = nl80211_connect,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_DISCONNECT,
.doit = nl80211_disconnect,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_SET_WIPHY_NETNS,
.doit = nl80211_wiphy_netns,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_GET_SURVEY,
.policy = nl80211_policy,
.dumpit = nl80211_dump_survey,
},
{
.cmd = NL80211_CMD_SET_PMKSA,
.doit = nl80211_setdel_pmksa,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_DEL_PMKSA,
.doit = nl80211_setdel_pmksa,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_FLUSH_PMKSA,
.doit = nl80211_flush_pmksa,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
.doit = nl80211_remain_on_channel,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
.doit = nl80211_cancel_remain_on_channel,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
.doit = nl80211_set_tx_bitrate_mask,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_REGISTER_ACTION,
.doit = nl80211_register_action,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_ACTION,
.doit = nl80211_action,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_SET_POWER_SAVE,
.doit = nl80211_set_power_save,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = NL80211_CMD_GET_POWER_SAVE,
.doit = nl80211_get_power_save,
.policy = nl80211_policy,
/* can be retrieved by unprivileged users */
},
{
.cmd = NL80211_CMD_SET_CQM,
.doit = nl80211_set_cqm,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
};
static struct genl_multicast_group nl80211_mlme_mcgrp = {
.name = "mlme",
};
/* multicast groups */
static struct genl_multicast_group nl80211_config_mcgrp = {
.name = "config",
};
static struct genl_multicast_group nl80211_scan_mcgrp = {
.name = "scan",
};
static struct genl_multicast_group nl80211_regulatory_mcgrp = {
.name = "regulatory",
};
/* notification functions */
void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
{
struct sk_buff *msg;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_config_mcgrp.id, GFP_KERNEL);
}
static int nl80211_add_scan_req(struct sk_buff *msg,
struct cfg80211_registered_device *rdev)
{
struct cfg80211_scan_request *req = rdev->scan_req;
struct nlattr *nest;
int i;
ASSERT_RDEV_LOCK(rdev);
if (WARN_ON(!req))
return 0;
nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
if (!nest)
goto nla_put_failure;
for (i = 0; i < req->n_ssids; i++)
NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
nla_nest_end(msg, nest);
nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
if (!nest)
goto nla_put_failure;
for (i = 0; i < req->n_channels; i++)
NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
nla_nest_end(msg, nest);
if (req->ie)
NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
return 0;
nla_put_failure:
return -ENOBUFS;
}
static int nl80211_send_scan_msg(struct sk_buff *msg,
struct cfg80211_registered_device *rdev,
struct net_device *netdev,
u32 pid, u32 seq, int flags,
u32 cmd)
{
void *hdr;
hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
if (!hdr)
return -1;
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
/* ignore errors and send incomplete event anyway */
nl80211_add_scan_req(msg, rdev);
return genlmsg_end(msg, hdr);
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
struct net_device *netdev)
{
struct sk_buff *msg;
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!msg)
return;
if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
NL80211_CMD_TRIGGER_SCAN) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_scan_mcgrp.id, GFP_KERNEL);
}
void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
struct net_device *netdev)
{
struct sk_buff *msg;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_scan_mcgrp.id, GFP_KERNEL);
}
void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
struct net_device *netdev)
{
struct sk_buff *msg;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
NL80211_CMD_SCAN_ABORTED) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_scan_mcgrp.id, GFP_KERNEL);
}
/*
* This can happen on global regulatory changes or device specific settings
* based on custom world regulatory domains.
*/
void nl80211_send_reg_change_event(struct regulatory_request *request)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
if (!hdr) {
nlmsg_free(msg);
return;
}
/* Userspace can always count this one always being set */
NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
NL80211_REGDOM_TYPE_WORLD);
else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
NL80211_REGDOM_TYPE_CUSTOM_WORLD);
else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
request->intersect)
NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
NL80211_REGDOM_TYPE_INTERSECTION);
else {
NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
NL80211_REGDOM_TYPE_COUNTRY);
NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
}
if (wiphy_idx_valid(request->wiphy_idx))
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
rcu_read_lock();
genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
GFP_ATOMIC);
rcu_read_unlock();
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
struct net_device *netdev,
const u8 *buf, size_t len,
enum nl80211_commands cmd, gfp_t gfp)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
if (!hdr) {
nlmsg_free(msg);
return;
}
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_mlme_mcgrp.id, gfp);
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *buf,
size_t len, gfp_t gfp)
{
nl80211_send_mlme_event(rdev, netdev, buf, len,
NL80211_CMD_AUTHENTICATE, gfp);
}
void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *buf,
size_t len, gfp_t gfp)
{
nl80211_send_mlme_event(rdev, netdev, buf, len,
NL80211_CMD_ASSOCIATE, gfp);
}
void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *buf,
size_t len, gfp_t gfp)
{
nl80211_send_mlme_event(rdev, netdev, buf, len,
NL80211_CMD_DEAUTHENTICATE, gfp);
}
void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *buf,
size_t len, gfp_t gfp)
{
nl80211_send_mlme_event(rdev, netdev, buf, len,
NL80211_CMD_DISASSOCIATE, gfp);
}
static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
struct net_device *netdev, int cmd,
const u8 *addr, gfp_t gfp)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
if (!hdr) {
nlmsg_free(msg);
return;
}
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_mlme_mcgrp.id, gfp);
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *addr,
gfp_t gfp)
{
nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
addr, gfp);
}
void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *addr,
gfp_t gfp)
{
nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
addr, gfp);
}
void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *bssid,
const u8 *req_ie, size_t req_ie_len,
const u8 *resp_ie, size_t resp_ie_len,
u16 status, gfp_t gfp)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
if (!hdr) {
nlmsg_free(msg);
return;
}
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
if (bssid)
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
if (req_ie)
NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
if (resp_ie)
NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_mlme_mcgrp.id, gfp);
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *bssid,
const u8 *req_ie, size_t req_ie_len,
const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
if (!hdr) {
nlmsg_free(msg);
return;
}
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
if (req_ie)
NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
if (resp_ie)
NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_mlme_mcgrp.id, gfp);
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u16 reason,
const u8 *ie, size_t ie_len, bool from_ap)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
if (!hdr) {
nlmsg_free(msg);
return;
}
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
if (from_ap && reason)
NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
if (from_ap)
NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
if (ie)
NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_mlme_mcgrp.id, GFP_KERNEL);
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *bssid,
gfp_t gfp)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
if (!hdr) {
nlmsg_free(msg);
return;
}
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_mlme_mcgrp.id, gfp);
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *addr,
enum nl80211_key_type key_type, int key_id,
const u8 *tsc, gfp_t gfp)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
if (!hdr) {
nlmsg_free(msg);
return;
}
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
if (addr)
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
if (tsc)
NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_mlme_mcgrp.id, gfp);
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
struct ieee80211_channel *channel_before,
struct ieee80211_channel *channel_after)
{
struct sk_buff *msg;
void *hdr;
struct nlattr *nl_freq;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
if (!hdr) {
nlmsg_free(msg);
return;
}
/*
* Since we are applying the beacon hint to a wiphy we know its
* wiphy_idx is valid
*/
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
/* Before */
nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
if (!nl_freq)
goto nla_put_failure;
if (nl80211_msg_put_channel(msg, channel_before))
goto nla_put_failure;
nla_nest_end(msg, nl_freq);
/* After */
nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
if (!nl_freq)
goto nla_put_failure;
if (nl80211_msg_put_channel(msg, channel_after))
goto nla_put_failure;
nla_nest_end(msg, nl_freq);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
rcu_read_lock();
genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
GFP_ATOMIC);
rcu_read_unlock();
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
static void nl80211_send_remain_on_chan_event(
int cmd, struct cfg80211_registered_device *rdev,
struct net_device *netdev, u64 cookie,
struct ieee80211_channel *chan,
enum nl80211_channel_type channel_type,
unsigned int duration, gfp_t gfp)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
if (!hdr) {
nlmsg_free(msg);
return;
}
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_mlme_mcgrp.id, gfp);
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u64 cookie,
struct ieee80211_channel *chan,
enum nl80211_channel_type channel_type,
unsigned int duration, gfp_t gfp)
{
nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
rdev, netdev, cookie, chan,
channel_type, duration, gfp);
}
void nl80211_send_remain_on_channel_cancel(
struct cfg80211_registered_device *rdev, struct net_device *netdev,
u64 cookie, struct ieee80211_channel *chan,
enum nl80211_channel_type channel_type, gfp_t gfp)
{
nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
rdev, netdev, cookie, chan,
channel_type, 0, gfp);
}
void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
struct net_device *dev, const u8 *mac_addr,
struct station_info *sinfo, gfp_t gfp)
{
struct sk_buff *msg;
msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
if (!msg)
return;
if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_mlme_mcgrp.id, gfp);
}
int nl80211_send_action(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u32 nlpid,
int freq, const u8 *buf, size_t len, gfp_t gfp)
{
struct sk_buff *msg;
void *hdr;
int err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return -ENOMEM;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION);
if (!hdr) {
nlmsg_free(msg);
return -ENOMEM;
}
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
err = genlmsg_end(msg, hdr);
if (err < 0) {
nlmsg_free(msg);
return err;
}
err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
if (err < 0)
return err;
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
return -ENOBUFS;
}
void nl80211_send_action_tx_status(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u64 cookie,
const u8 *buf, size_t len, bool ack,
gfp_t gfp)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION_TX_STATUS);
if (!hdr) {
nlmsg_free(msg);
return;
}
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
if (ack)
NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
void
nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
struct net_device *netdev,
enum nl80211_cqm_rssi_threshold_event rssi_event,
gfp_t gfp)
{
struct sk_buff *msg;
struct nlattr *pinfoattr;
void *hdr;
msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
if (!hdr) {
nlmsg_free(msg);
return;
}
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
if (!pinfoattr)
goto nla_put_failure;
NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
rssi_event);
nla_nest_end(msg, pinfoattr);
if (genlmsg_end(msg, hdr) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_mlme_mcgrp.id, gfp);
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
static int nl80211_netlink_notify(struct notifier_block * nb,
unsigned long state,
void *_notify)
{
struct netlink_notify *notify = _notify;
struct cfg80211_registered_device *rdev;
struct wireless_dev *wdev;
if (state != NETLINK_URELEASE)
return NOTIFY_DONE;
rcu_read_lock();
list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
cfg80211_mlme_unregister_actions(wdev, notify->pid);
rcu_read_unlock();
return NOTIFY_DONE;
}
static struct notifier_block nl80211_netlink_notifier = {
.notifier_call = nl80211_netlink_notify,
};
/* initialisation/exit functions */
int nl80211_init(void)
{
int err;
err = genl_register_family_with_ops(&nl80211_fam,
nl80211_ops, ARRAY_SIZE(nl80211_ops));
if (err)
return err;
err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
if (err)
goto err_out;
err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
if (err)
goto err_out;
err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
if (err)
goto err_out;
err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
if (err)
goto err_out;
#ifdef CONFIG_NL80211_TESTMODE
err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
if (err)
goto err_out;
#endif
err = netlink_register_notifier(&nl80211_netlink_notifier);
if (err)
goto err_out;
return 0;
err_out:
genl_unregister_family(&nl80211_fam);
return err;
}
void nl80211_exit(void)
{
netlink_unregister_notifier(&nl80211_netlink_notifier);
genl_unregister_family(&nl80211_fam);
}
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