blob: ca3c92a0a14f26898c5e07a137a54393e1279fdd [file] [log] [blame]
/*
* This is the new netlink-based wireless configuration interface.
*
* Copyright 2006-2009 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 struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
[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_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 },
};
/* policy for the attributes */
static struct nla_policy
nl80211_key_policy[NL80211_KEY_MAX + 1] __read_mostly = {
[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 },
};
/* 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_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);
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);
if (dev->wiphy.netnsok) {
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;
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 (changed) {
u8 old_retry_short, old_retry_long;
u32 old_frag_threshold, old_rts_threshold;
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;
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;
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;
}
}
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_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_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;
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]);
}
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_WIRELESS_EXT
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_WIRELESS_EXT
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 u16 nl80211_calculate_bitrate(struct rate_info *rate)
{
int modulation, streams, bitrate;
if (!(rate->flags & RATE_INFO_FLAGS_MCS))
return rate->legacy;
/* the formula below does only work for MCS values smaller than 32 */
if (rate->mcs >= 32)
return 0;
modulation = rate->mcs & 7;
streams = (rate->mcs >> 3) + 1;
bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
13500000 : 6500000;
if (modulation < 4)
bitrate *= (modulation + 1);
else if (modulation == 4)
bitrate *= (modulation + 2);
else
bitrate *= (modulation + 3);
bitrate *= streams;
if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
bitrate = (bitrate / 9) * 10;
/* do NOT round down here */
return (bitrate + 50000) / 100000;
}
static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
int flags, struct net_device *dev,
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;
/* nl80211_calculate_bitrate will return 0 for mcs >= 32 */
bitrate = nl80211_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) {
err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
nl80211_fam.attrbuf, nl80211_fam.maxattr,
nl80211_policy);
if (err)
return err;
if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
return -EINVAL;
ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
if (!ifidx)
return -EINVAL;
}
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 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;
}
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;
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]);
if (info->attrs[NL80211_ATTR_STA_AID]) {
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;
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:
/* all ok but must have AID */
if (!params.aid)
err = -EINVAL;
break;
case NL80211_IFTYPE_MESH_POINT:
/* disallow things mesh doesn't support */
if (params.vlan)
err = -EINVAL;
if (params.aid)
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->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 &&
dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
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_DSN)
NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
pinfo->dsn);
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) {
err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
nl80211_fam.attrbuf, nl80211_fam.maxattr,
nl80211_policy);
if (err)
return err;
if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
return -EINVAL;
ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
if (!ifidx)
return -EINVAL;
}
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]);
#ifdef CONFIG_WIRELESS_OLD_REGULATORY
/* We ignore world regdom requests with the old regdom setup */
if (is_world_regdom(data))
return -EINVAL;
#endif
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_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 struct nla_policy
nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
[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);