nl80211.c 72.5 KB
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/*
 * This is the new netlink-based wireless configuration interface.
 *
 * Copyright 2006, 2007	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>
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#include <linux/etherdevice.h>
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#include <net/genetlink.h>
#include <net/cfg80211.h>
#include "core.h"
#include "nl80211.h"
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#include "reg.h"
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/* 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,
};

/* internal helper: get drv and dev */
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static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
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				       struct cfg80211_registered_device **drv,
				       struct net_device **dev)
{
	int ifindex;

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	if (!attrs[NL80211_ATTR_IFINDEX])
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		return -EINVAL;

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	ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
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	*dev = dev_get_by_index(&init_net, ifindex);
	if (!*dev)
		return -ENODEV;

	*drv = cfg80211_get_dev_from_ifindex(ifindex);
	if (IS_ERR(*drv)) {
		dev_put(*dev);
		return PTR_ERR(*drv);
	}

	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 = BUS_ID_SIZE-1 },
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	[NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
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	[NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
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	[NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
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	[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
	[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
	[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
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	[NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },

	[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 },
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	[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 },
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	[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 },
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	[NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
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	[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
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	[NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
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	[NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
				.len = IEEE80211_MAX_MESH_ID_LEN },
	[NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
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	[NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
	[NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },

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	[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 },
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	[NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
					   .len = NL80211_MAX_SUPP_RATES },
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	[NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },

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	[NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
					 .len = NL80211_HT_CAPABILITY_LEN },
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	[NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
	[NL80211_ATTR_IE] = { .type = NLA_BINARY,
			      .len = IEEE80211_MAX_DATA_LEN },
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	[NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
	[NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
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};

/* 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);
}

/* netlink command implementations */

static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			      struct cfg80211_registered_device *dev)
{
	void *hdr;
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	struct nlattr *nl_bands, *nl_band;
	struct nlattr *nl_freqs, *nl_freq;
	struct nlattr *nl_rates, *nl_rate;
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	struct nlattr *nl_modes;
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	struct nlattr *nl_cmds;
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	enum ieee80211_band band;
	struct ieee80211_channel *chan;
	struct ieee80211_rate *rate;
	int i;
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	u16 ifmodes = dev->wiphy.interface_modes;
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	hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
	if (!hdr)
		return -1;

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	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
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	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
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	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
		   dev->wiphy.max_scan_ssids);
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	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);

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	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;

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		/* 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);
		}

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		/* 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];
			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);

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			NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
				    DBM_TO_MBM(chan->max_power));
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			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);

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	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(set_mgmt_extra_ie, SET_MGMT_EXTRA_IE);

#undef CMD
	nla_nest_end(msg, nl_cmds);

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	return genlmsg_end(msg, hdr);

 nla_put_failure:
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	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
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}

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;

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	mutex_lock(&cfg80211_mutex);
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	list_for_each_entry(dev, &cfg80211_drv_list, list) {
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		if (++idx <= start)
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			continue;
		if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
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				       dev) < 0) {
			idx--;
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			break;
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		}
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	}
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	mutex_unlock(&cfg80211_mutex);
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	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_GOODSIZE, 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_put_dev(dev);

	return genlmsg_unicast(msg, info->snd_pid);

 out_free:
	nlmsg_free(msg);
 out_err:
	cfg80211_put_dev(dev);
	return -ENOBUFS;
}

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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;
}

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static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
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	int result = 0, rem_txq_params = 0;
	struct nlattr *nl_txq_params;
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	rdev = cfg80211_get_dev_from_info(info);
	if (IS_ERR(rdev))
		return PTR_ERR(rdev);

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	if (info->attrs[NL80211_ATTR_WIPHY_NAME]) {
		result = cfg80211_dev_rename(
			rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
		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;
		}
	}
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	if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
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		enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
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		struct ieee80211_channel *chan;
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		struct ieee80211_sta_ht_cap *ht_cap;
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		u32 freq, sec_freq;

		if (!rdev->ops->set_channel) {
			result = -EOPNOTSUPP;
			goto bad_res;
		}

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		result = -EINVAL;

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		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)
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				goto bad_res;
		}

		freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
		chan = ieee80211_get_channel(&rdev->wiphy, freq);
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		/* Primary channel not allowed */
		if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
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			goto bad_res;
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		if (channel_type == NL80211_CHAN_HT40MINUS)
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			sec_freq = freq - 20;
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		else if (channel_type == NL80211_CHAN_HT40PLUS)
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			sec_freq = freq + 20;
		else
			sec_freq = 0;

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		ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;

		/* no HT capabilities */
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		if (channel_type != NL80211_CHAN_NO_HT &&
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		    !ht_cap->ht_supported)
			goto bad_res;

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		if (sec_freq) {
			struct ieee80211_channel *schan;
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			/* no 40 MHz capabilities */
			if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
			    (ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT))
				goto bad_res;

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			schan = ieee80211_get_channel(&rdev->wiphy, sec_freq);
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			/* Secondary channel not allowed */
			if (!schan || schan->flags & IEEE80211_CHAN_DISABLED)
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				goto bad_res;
		}

		result = rdev->ops->set_channel(&rdev->wiphy, chan,
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						channel_type);
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		if (result)
			goto bad_res;
	}


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 bad_res:
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	cfg80211_put_dev(rdev);
	return result;
}


static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			      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_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
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	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
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	return genlmsg_end(msg, hdr);

 nla_put_failure:
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	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
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}

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 *dev;
	struct wireless_dev *wdev;

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	mutex_lock(&cfg80211_mutex);
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	list_for_each_entry(dev, &cfg80211_drv_list, list) {
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		if (wp_idx < wp_start) {
			wp_idx++;
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			continue;
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		}
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		if_idx = 0;

		mutex_lock(&dev->devlist_mtx);
		list_for_each_entry(wdev, &dev->netdev_list, list) {
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			if (if_idx < if_start) {
				if_idx++;
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				continue;
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			}
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			if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
					       cb->nlh->nlmsg_seq, NLM_F_MULTI,
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					       wdev->netdev) < 0) {
				mutex_unlock(&dev->devlist_mtx);
				goto out;
			}
			if_idx++;
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		}
		mutex_unlock(&dev->devlist_mtx);
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		wp_idx++;
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	}
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 out:
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	mutex_unlock(&cfg80211_mutex);
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	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;

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	err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
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	if (err)
		return err;

	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
	if (!msg)
		goto out_err;

	if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, netdev) < 0)
		goto out_free;

	dev_put(netdev);
	cfg80211_put_dev(dev);

	return genlmsg_unicast(msg, info->snd_pid);

 out_free:
	nlmsg_free(msg);
 out_err:
	dev_put(netdev);
	cfg80211_put_dev(dev);
	return -ENOBUFS;
}

565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593
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;
}

594 595 596
static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
597
	struct vif_params params;
598 599 600
	int err, ifindex;
	enum nl80211_iftype type;
	struct net_device *dev;
601
	u32 _flags, *flags = NULL;
602

603 604
	memset(&params, 0, sizeof(params));

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	rtnl_lock();

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607
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
608
	if (err)
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		goto unlock_rtnl;

611
	ifindex = dev->ifindex;
612
	type = dev->ieee80211_ptr->iftype;
613 614
	dev_put(dev);

615 616 617 618 619 620 621
	err = -EINVAL;
	if (info->attrs[NL80211_ATTR_IFTYPE]) {
		type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
		if (type > NL80211_IFTYPE_MAX)
			goto unlock;
	}

622 623
	if (!drv->ops->change_virtual_intf ||
	    !(drv->wiphy.interface_modes & (1 << type))) {
624 625 626 627
		err = -EOPNOTSUPP;
		goto unlock;
	}

628 629 630 631 632
	if (info->attrs[NL80211_ATTR_MESH_ID]) {
		if (type != NL80211_IFTYPE_MESH_POINT) {
			err = -EINVAL;
			goto unlock;
		}
633 634 635 636
		params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
		params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
	}

637 638 639 640 641 642 643 644 645 646
	if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
		if (type != NL80211_IFTYPE_MONITOR) {
			err = -EINVAL;
			goto unlock;
		}
		err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
					  &_flags);
		if (!err)
			flags = &_flags;
	}
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648
	err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
649
					    type, flags, &params);
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	dev = __dev_get_by_index(&init_net, ifindex);
	WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type));

654 655
 unlock:
	cfg80211_put_dev(drv);
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 unlock_rtnl:
	rtnl_unlock();
658 659 660 661 662 663
	return err;
}

static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
664
	struct vif_params params;
665 666
	int err;
	enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
667
	u32 flags;
668

669 670
	memset(&params, 0, sizeof(params));

671 672 673 674 675 676 677 678 679
	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;
	}

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	rtnl_lock();

682
	drv = cfg80211_get_dev_from_info(info);
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	if (IS_ERR(drv)) {
		err = PTR_ERR(drv);
		goto unlock_rtnl;
	}
687

688 689
	if (!drv->ops->add_virtual_intf ||
	    !(drv->wiphy.interface_modes & (1 << type))) {
690 691 692 693
		err = -EOPNOTSUPP;
		goto unlock;
	}

694 695 696 697 698 699
	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]);
	}

700 701 702
	err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
				  info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
				  &flags);
703
	err = drv->ops->add_virtual_intf(&drv->wiphy,
704
		nla_data(info->attrs[NL80211_ATTR_IFNAME]),
705 706
		type, err ? NULL : &flags, &params);

707 708
 unlock:
	cfg80211_put_dev(drv);
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 unlock_rtnl:
	rtnl_unlock();
711 712 713 714 715 716 717 718 719
	return err;
}

static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int ifindex, err;
	struct net_device *dev;

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	rtnl_lock();

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	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
723
	if (err)
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		goto unlock_rtnl;
725 726 727 728 729 730 731 732 733 734 735 736
	ifindex = dev->ifindex;
	dev_put(dev);

	if (!drv->ops->del_virtual_intf) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);

 out:
	cfg80211_put_dev(drv);
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 unlock_rtnl:
	rtnl_unlock();
739 740 741
	return err;
}

742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783
struct get_key_cookie {
	struct sk_buff *msg;
	int error;
};

static void get_key_callback(void *c, struct key_params *params)
{
	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);

	return;
 nla_put_failure:
	cookie->error = 1;
}

static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	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]);

784
	if (key_idx > 5)
785 786 787 788 789
		return -EINVAL;

	if (info->attrs[NL80211_ATTR_MAC])
		mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

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	rtnl_lock();

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	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
793
	if (err)
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		goto unlock_rtnl;
795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840

	if (!drv->ops->get_key) {
		err = -EOPNOTSUPP;
		goto out;
	}

	msg = nlmsg_new(NLMSG_GOODSIZE, 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 out;
	}

	cookie.msg = msg;

	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 = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
				&cookie, get_key_callback);

	if (err)
		goto out;

	if (cookie.error)
		goto nla_put_failure;

	genlmsg_end(msg, hdr);
	err = genlmsg_unicast(msg, info->snd_pid);
	goto out;

 nla_put_failure:
	err = -ENOBUFS;
	nlmsg_free(msg);
 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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841 842 843
 unlock_rtnl:
	rtnl_unlock();

844 845 846 847 848 849 850 851 852
	return err;
}

static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;
	u8 key_idx;
853 854
	int (*func)(struct wiphy *wiphy, struct net_device *netdev,
		    u8 key_index);
855 856 857 858 859 860

	if (!info->attrs[NL80211_ATTR_KEY_IDX])
		return -EINVAL;

	key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);

861 862 863 864
	if (info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]) {
		if (key_idx < 4 || key_idx > 5)
			return -EINVAL;
	} else if (key_idx > 3)
865 866 867
		return -EINVAL;

	/* currently only support setting default key */
868 869
	if (!info->attrs[NL80211_ATTR_KEY_DEFAULT] &&
	    !info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT])
870 871
		return -EINVAL;

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	rtnl_lock();

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	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
875
	if (err)
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		goto unlock_rtnl;
877

878 879 880 881 882 883
	if (info->attrs[NL80211_ATTR_KEY_DEFAULT])
		func = drv->ops->set_default_key;
	else
		func = drv->ops->set_default_mgmt_key;

	if (!func) {
884 885 886 887
		err = -EOPNOTSUPP;
		goto out;
	}

888
	err = func(&drv->wiphy, dev, key_idx);
889 890 891 892

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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 unlock_rtnl:
	rtnl_unlock();

897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926
	return err;
}

static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;
	struct key_params params;
	u8 key_idx = 0;
	u8 *mac_addr = NULL;

	memset(&params, 0, sizeof(params));

	if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
		return -EINVAL;

	if (info->attrs[NL80211_ATTR_KEY_DATA]) {
		params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
		params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
	}

	if (info->attrs[NL80211_ATTR_KEY_IDX])
		key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);

	params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);

	if (info->attrs[NL80211_ATTR_MAC])
		mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

927
	if (key_idx > 5)
928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957
		return -EINVAL;

	/*
	 * Disallow pairwise keys with non-zero index unless it's WEP
	 * (because current deployments use pairwise WEP keys with
	 * non-zero indizes but 802.11i clearly specifies to use zero)
	 */
	if (mac_addr && key_idx &&
	    params.cipher != WLAN_CIPHER_SUITE_WEP40 &&
	    params.cipher != WLAN_CIPHER_SUITE_WEP104)
		return -EINVAL;

	/* TODO: add definitions for the lengths to linux/ieee80211.h */
	switch (params.cipher) {
	case WLAN_CIPHER_SUITE_WEP40:
		if (params.key_len != 5)
			return -EINVAL;
		break;
	case WLAN_CIPHER_SUITE_TKIP:
		if (params.key_len != 32)
			return -EINVAL;
		break;
	case WLAN_CIPHER_SUITE_CCMP:
		if (params.key_len != 16)
			return -EINVAL;
		break;
	case WLAN_CIPHER_SUITE_WEP104:
		if (params.key_len != 13)
			return -EINVAL;
		break;
958 959 960 961
	case WLAN_CIPHER_SUITE_AES_CMAC:
		if (params.key_len != 16)
			return -EINVAL;
		break;
962 963 964 965
	default:
		return -EINVAL;
	}

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	rtnl_lock();

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	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
969
	if (err)
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		goto unlock_rtnl;
971 972 973 974 975 976 977 978 979 980 981

	if (!drv->ops->add_key) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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 unlock_rtnl:
	rtnl_unlock();

985 986 987 988 989 990 991 992 993 994 995 996 997 998
	return err;
}

static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;
	u8 key_idx = 0;
	u8 *mac_addr = NULL;

	if (info->attrs[NL80211_ATTR_KEY_IDX])
		key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);

999
	if (key_idx > 5)
1000 1001 1002 1003 1004
		return -EINVAL;

	if (info->attrs[NL80211_ATTR_MAC])
		mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

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	rtnl_lock();

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	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1008
	if (err)
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		goto unlock_rtnl;
1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020

	if (!drv->ops->del_key) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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 unlock_rtnl:
	rtnl_unlock();

1025 1026 1027
	return err;
}

1028 1029 1030 1031 1032 1033 1034 1035 1036 1037
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 *drv;
	int err;
	struct net_device *dev;
	struct beacon_parameters params;
	int haveinfo = 0;

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	rtnl_lock();

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	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1041
	if (err)
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		goto unlock_rtnl;
1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107

	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 = drv->ops->add_beacon;
		break;
	case NL80211_CMD_SET_BEACON:
		call = drv->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(&drv->wiphy, dev, &params);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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1108 1109 1110
 unlock_rtnl:
	rtnl_unlock();

1111 1112 1113 1114 1115 1116 1117 1118 1119
	return err;
}

static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;

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	rtnl_lock();

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1122
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1123
	if (err)
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		goto unlock_rtnl;
1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135

	if (!drv->ops->del_beacon) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->del_beacon(&drv->wiphy, dev);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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1136 1137 1138
 unlock_rtnl:
	rtnl_unlock();

1139 1140 1141
	return err;
}

1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170
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 },
};

static int parse_station_flags(struct nlattr *nla, u32 *staflags)
{
	struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
	int flag;

	*staflags = 0;

	if (!nla)
		return 0;

	if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
			     nla, sta_flags_policy))
		return -EINVAL;

	*staflags = STATION_FLAG_CHANGED;

	for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
		if (flags[flag])
			*staflags |= (1<<flag);

	return 0;
}

1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203
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;
}

1204 1205
static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
				int flags, struct net_device *dev,
1206
				u8 *mac_addr, struct station_info *sinfo)
1207 1208
{
	void *hdr;
1209 1210
	struct nlattr *sinfoattr, *txrate;
	u16 bitrate;
1211 1212 1213 1214 1215 1216 1217 1218

	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);

1219 1220
	sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
	if (!sinfoattr)
1221
		goto nla_put_failure;
1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239
	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);
1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251
	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);
1252

1253 1254 1255 1256 1257 1258 1259 1260 1261 1262
		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);
	}
1263 1264 1265 1266 1267 1268
	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);
1269
	nla_nest_end(msg, sinfoattr);
1270 1271 1272 1273

	return genlmsg_end(msg, hdr);

 nla_put_failure:
1274 1275
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
1276 1277
}

1278
static int nl80211_dump_station(struct sk_buff *skb,
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1279
				struct netlink_callback *cb)
1280 1281 1282
{
	struct station_info sinfo;
	struct cfg80211_registered_device *dev;
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1283
	struct net_device *netdev;
1284
	u8 mac_addr[ETH_ALEN];
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1285 1286
	int ifidx = cb->args[0];
	int sta_idx = cb->args[1];
1287 1288
	int err;

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1289 1290 1291 1292 1293 1294
	if (!ifidx) {
		err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
				  nl80211_fam.attrbuf, nl80211_fam.maxattr,
				  nl80211_policy);
		if (err)
			return err;
1295

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1296 1297
		if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
			return -EINVAL;
1298

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1299 1300 1301
		ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
		if (!ifidx)
			return -EINVAL;
1302 1303
	}

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	rtnl_lock();

	netdev = __dev_get_by_index(&init_net, ifidx);
	if (!netdev) {
		err = -ENODEV;
		goto out_rtnl;
	}
1311

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1312 1313 1314
	dev = cfg80211_get_dev_from_ifindex(ifidx);
	if (IS_ERR(dev)) {
		err = PTR_ERR(dev);
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		goto out_rtnl;
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1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328
	}

	if (!dev->ops->dump_station) {
		err = -ENOSYS;
		goto out_err;
	}

	while (1) {
		err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
					     mac_addr, &sinfo);
		if (err == -ENOENT)
			break;
		if (err)
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1329
			goto out_err;
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1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346

		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_put_dev(dev);
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1347 1348
 out_rtnl:
	rtnl_unlock();
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1349 1350

	return err;
1351
}
1352

1353 1354
static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
{
1355 1356 1357
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;
1358
	struct station_info sinfo;
1359 1360 1361
	struct sk_buff *msg;
	u8 *mac_addr = NULL;

1362
	memset(&sinfo, 0, sizeof(sinfo));
1363 1364 1365 1366 1367 1368

	if (!info->attrs[NL80211_ATTR_MAC])
		return -EINVAL;

	mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

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1369 1370
	rtnl_lock();

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1371
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1372
	if (err)
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		goto out_rtnl;
1374 1375 1376 1377 1378 1379

	if (!drv->ops->get_station) {
		err = -EOPNOTSUPP;
		goto out;
	}

1380 1381 1382 1383
	err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
	if (err)
		goto out;

1384 1385 1386 1387 1388
	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
	if (!msg)
		goto out;

	if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1389
				 dev, mac_addr, &sinfo) < 0)
1390 1391 1392 1393 1394 1395 1396 1397 1398 1399
		goto out_free;

	err = genlmsg_unicast(msg, info->snd_pid);
	goto out;

 out_free:
	nlmsg_free(msg);
 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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1400 1401 1402
 out_rtnl:
	rtnl_unlock();

1403
	return err;
1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457
}

/*
 * Get vlan interface making sure it is on the right wiphy.
 */
static int get_vlan(struct nlattr *vlanattr,
		    struct cfg80211_registered_device *rdev,
		    struct net_device **vlan)
{
	*vlan = NULL;

	if (vlanattr) {
		*vlan = dev_get_by_index(&init_net, 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 *drv;
	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]);

1458 1459 1460 1461
	if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
		params.ht_capa =
			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);

1462 1463 1464 1465
	if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
				&params.station_flags))
		return -EINVAL;

1466 1467 1468 1469
	if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
		params.plink_action =
		    nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);

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1470 1471
	rtnl_lock();

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1472
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1473
	if (err)
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		goto out_rtnl;
1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491

	err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
	if (err)
		goto out;

	if (!drv->ops->change_station) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);

 out:
	if (params.vlan)
		dev_put(params.vlan);
	cfg80211_put_dev(drv);
	dev_put(dev);
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1492 1493 1494
 out_rtnl:
	rtnl_unlock();

1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526
	return err;
}

static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	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_AID])
		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]);
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1527
	params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1528 1529 1530
	if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
		params.ht_capa =
			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1531 1532 1533 1534 1535

	if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
				&params.station_flags))
		return -EINVAL;

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1536 1537
	rtnl_lock();

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1538
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1539
	if (err)
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1540
		goto out_rtnl;
1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557

	err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
	if (err)
		goto out;

	if (!drv->ops->add_station) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);

 out:
	if (params.vlan)
		dev_put(params.vlan);
	cfg80211_put_dev(drv);
	dev_put(dev);
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1558 1559 1560
 out_rtnl:
	rtnl_unlock();

1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573
	return err;
}

static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	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]);

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1574 1575
	rtnl_lock();

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1576
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1577
	if (err)
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1578
		goto out_rtnl;
1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589

	if (!drv->ops->del_station) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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1590 1591 1592
 out_rtnl:
	rtnl_unlock();

1593 1594 1595
	return err;
}

1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641
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);

	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:
1642 1643
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
1644 1645 1646
}

static int nl80211_dump_mpath(struct sk_buff *skb,
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1647
			      struct netlink_callback *cb)
1648 1649 1650
{
	struct mpath_info pinfo;
	struct cfg80211_registered_device *dev;
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1651
	struct net_device *netdev;
1652 1653
	u8 dst[ETH_ALEN];
	u8 next_hop[ETH_ALEN];
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1654 1655
	int ifidx = cb->args[0];
	int path_idx = cb->args[1];
1656 1657
	int err;

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1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672
	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;
	}

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1673 1674 1675 1676 1677 1678 1679
	rtnl_lock();

	netdev = __dev_get_by_index(&init_net, ifidx);
	if (!netdev) {
		err = -ENODEV;
		goto out_rtnl;
	}
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1680 1681 1682 1683

	dev = cfg80211_get_dev_from_ifindex(ifidx);
	if (IS_ERR(dev)) {
		err = PTR_ERR(dev);
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1684
		goto out_rtnl;
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1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695
	}

	if (!dev->ops->dump_mpath) {
		err = -ENOSYS;
		goto out_err;
	}

	while (1) {
		err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
					   dst, next_hop, &pinfo);
		if (err == -ENOENT)
1696
			break;
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1697
		if (err)
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1698
			goto out_err;
1699

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1700 1701 1702 1703 1704
		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;
1705

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1706
		path_idx++;
1707 1708 1709
	}


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1710 1711 1712 1713 1714
 out:
	cb->args[1] = path_idx;
	err = skb->len;
 out_err:
	cfg80211_put_dev(dev);
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1715 1716
 out_rtnl:
	rtnl_unlock();
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1717 1718

	return err;
1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737
}

static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	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]);

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1738 1739
	rtnl_lock();

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1740
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1741
	if (err)
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1742
		goto out_rtnl;
1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768

	if (!drv->ops->get_mpath) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
	if (err)
		goto out;

	msg = nlmsg_new(NLMSG_GOODSIZE, 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_unicast(msg, info->snd_pid);
	goto out;

 out_free:
	nlmsg_free(msg);
 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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1769 1770 1771
 out_rtnl:
	rtnl_unlock();

1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791
	return err;
}

static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	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]);

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	rtnl_lock();

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	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1795
	if (err)
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1796
		goto out_rtnl;
1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807

	if (!drv->ops->change_mpath) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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1808 1809 1810
 out_rtnl:
	rtnl_unlock();

1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829
	return err;
}
static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	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]);

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	rtnl_lock();

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1832
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1833
	if (err)
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1834
		goto out_rtnl;
1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845

	if (!drv->ops->add_mpath) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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1846 1847 1848
 out_rtnl:
	rtnl_unlock();

1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861
	return err;
}

static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;
	u8 *dst = NULL;

	if (info->attrs[NL80211_ATTR_MAC])
		dst = nla_data(info->attrs[NL80211_ATTR_MAC]);

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1862 1863
	rtnl_lock();

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1864
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1865
	if (err)
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		goto out_rtnl;
1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877

	if (!drv->ops->del_mpath) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->del_mpath(&drv->wiphy, dev, dst);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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1878 1879 1880
 out_rtnl:
	rtnl_unlock();

1881 1882 1883
	return err;
}

1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905
static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	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]);
1906 1907 1908 1909 1910 1911
	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]);
	}
1912

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1913 1914
	rtnl_lock();

1915 1916
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
	if (err)
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1917
		goto out_rtnl;
1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928

	if (!drv->ops->change_bss) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->change_bss(&drv->wiphy, dev, &params);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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1929 1930 1931
 out_rtnl:
	rtnl_unlock();

1932 1933 1934
	return err;
}

1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985
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;

1986 1987 1988 1989 1990 1991 1992 1993
	/*
	 * 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)) {
1994 1995
		mutex_unlock(&cfg80211_mutex);
		return -EINPROGRESS;
1996
	}
1997
	mutex_unlock(&cfg80211_mutex);
1998

1999 2000
	if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
		return -EINVAL;
2001 2002 2003 2004 2005

	data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);

#ifdef CONFIG_WIRELESS_OLD_REGULATORY
	/* We ignore world regdom requests with the old regdom setup */
2006 2007
	if (is_world_regdom(data))
		return -EINVAL;
2008
#endif
2009 2010 2011

	r = regulatory_hint_user(data);

2012 2013 2014
	return r;
}

2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
static int nl80211_get_mesh_params(struct sk_buff *skb,
	struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	struct mesh_config cur_params;
	int err;
	struct net_device *dev;
	void *hdr;
	struct nlattr *pinfoattr;
	struct sk_buff *msg;

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	rtnl_lock();

2028 2029 2030
	/* Look up our device */
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
	if (err)
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		goto out_rtnl;
2032

2033 2034 2035 2036 2037
	if (!drv->ops->get_mesh_params) {
		err = -EOPNOTSUPP;
		goto out;
	}

2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087
	/* Get the mesh params */
	err = drv->ops->get_mesh_params(&drv->wiphy, dev, &cur_params);
	if (err)
		goto out;

	/* Draw up a netlink message to send back */
	msg = nlmsg_new(NLMSG_GOODSIZE, 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_unicast(msg, info->snd_pid);
	goto out;

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2088
 nla_put_failure:
2089 2090
	genlmsg_cancel(msg, hdr);
	err = -EMSGSIZE;
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2091
 out:
2092 2093 2094
	/* Cleanup */
	cfg80211_put_dev(drv);
	dev_put(dev);
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2095 2096 2097
 out_rtnl:
	rtnl_unlock();

2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143
	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 *drv;
	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;

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2144 2145
	rtnl_lock();

2146 2147
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
	if (err)
J
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2148
		goto out_rtnl;
2149

2150 2151 2152 2153 2154
	if (!drv->ops->set_mesh_params) {
		err = -EOPNOTSUPP;
		goto out;
	}

2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196
	/* 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);

	/* Apply changes */
	err = drv->ops->set_mesh_params(&drv->wiphy, dev, &cfg, mask);

2197
 out:
2198 2199 2200
	/* cleanup */
	cfg80211_put_dev(drv);
	dev_put(dev);
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2201 2202 2203
 out_rtnl:
	rtnl_unlock();

2204 2205 2206 2207 2208
	return err;
}

#undef FILL_IN_MESH_PARAM_IF_SET

2209 2210 2211 2212 2213 2214 2215 2216
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;

2217
	mutex_lock(&cfg80211_mutex);
2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279

	if (!cfg80211_regdomain)
		goto out;

	msg = nlmsg_new(NLMSG_GOODSIZE, 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_unicast(msg, info->snd_pid);
	goto out;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
	err = -EMSGSIZE;
out:
2280
	mutex_unlock(&cfg80211_mutex);
2281 2282 2283
	return err;
}

2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338
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)
			goto bad_reg;
	}

	if (!reg_is_valid_request(alpha2))
		return -EINVAL;

	size_of_regd = sizeof(struct ieee80211_regdomain) +
		(num_rules * sizeof(struct ieee80211_reg_rule));

	rd = kzalloc(size_of_regd, GFP_KERNEL);
	if (!rd)
		return -ENOMEM;

	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)
			goto bad_reg;
	}

	BUG_ON(rule_idx != num_rules);

2339
	mutex_lock(&cfg80211_mutex);
2340
	r = set_regdom(rd);
2341
	mutex_unlock(&cfg80211_mutex);
2342 2343
	return r;

2344
 bad_reg:
2345 2346 2347 2348
	kfree(rd);
	return -EINVAL;
}

2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369
static int nl80211_set_mgmt_extra_ie(struct sk_buff *skb,
				     struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;
	struct mgmt_extra_ie_params params;

	memset(&params, 0, sizeof(params));

	if (!info->attrs[NL80211_ATTR_MGMT_SUBTYPE])
		return -EINVAL;
	params.subtype = nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
	if (params.subtype > 15)
		return -EINVAL; /* FC Subtype field is 4 bits (0..15) */

	if (info->attrs[NL80211_ATTR_IE]) {
		params.ies = nla_data(info->attrs[NL80211_ATTR_IE]);
		params.ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
	}

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2370 2371
	rtnl_lock();

2372 2373
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
	if (err)
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2374
		goto out_rtnl;
2375

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2376
	if (drv->ops->set_mgmt_extra_ie)
2377
		err = drv->ops->set_mgmt_extra_ie(&drv->wiphy, dev, &params);
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2378
	else
2379 2380 2381 2382
		err = -EOPNOTSUPP;

	cfg80211_put_dev(drv);
	dev_put(dev);
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2383 2384 2385
 out_rtnl:
	rtnl_unlock();

2386 2387 2388
	return err;
}

2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399
static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	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 = 0, i;
	enum ieee80211_band band;
2400
	size_t ie_len;
2401

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2402 2403
	rtnl_lock();

2404 2405
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
	if (err)
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2406
		goto out_rtnl;
2407 2408 2409 2410 2411 2412 2413 2414 2415 2416

	wiphy = &drv->wiphy;

	if (!drv->ops->scan) {
		err = -EOPNOTSUPP;
		goto out;
	}

	if (drv->scan_req) {
		err = -EBUSY;
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		goto out;
2418 2419 2420 2421 2422 2423 2424
	}

	if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
		nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp)
			n_channels++;
		if (!n_channels) {
			err = -EINVAL;
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			goto out;
2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438
		}
	} else {
		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;
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		goto out;
2440 2441
	}

2442 2443 2444 2445 2446
	if (info->attrs[NL80211_ATTR_IE])
		ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
	else
		ie_len = 0;

2447 2448
	request = kzalloc(sizeof(*request)
			+ sizeof(*ssid) * n_ssids
2449 2450
			+ sizeof(channel) * n_channels
			+ ie_len, GFP_KERNEL);
2451 2452
	if (!request) {
		err = -ENOMEM;
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2453
		goto out;
2454 2455 2456 2457 2458 2459 2460
	}

	request->channels = (void *)((char *)request + sizeof(*request));
	request->n_channels = n_channels;
	if (n_ssids)
		request->ssids = (void *)(request->channels + n_channels);
	request->n_ssids = n_ssids;
2461 2462 2463 2464 2465 2466
	if (ie_len) {
		if (request->ssids)
			request->ie = (void *)(request->ssids + n_ssids);
		else
			request->ie = (void *)(request->channels + n_channels);
	}
2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506

	if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
		/* user specified, bail out if channel not found */
		request->n_channels = n_channels;
		i = 0;
		nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
			request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
			if (!request->channels[i]) {
				err = -EINVAL;
				goto out_free;
			}
			i++;
		}
	} else {
		/* all channels */
		i = 0;
		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++) {
				request->channels[i] = &wiphy->bands[band]->channels[j];
				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++;
		}
	}

2507 2508 2509 2510 2511 2512
	if (info->attrs[NL80211_ATTR_IE]) {
		request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
		memcpy(request->ie, nla_data(info->attrs[NL80211_ATTR_IE]),
		       request->ie_len);
	}

2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526
	request->ifidx = dev->ifindex;
	request->wiphy = &drv->wiphy;

	drv->scan_req = request;
	err = drv->ops->scan(&drv->wiphy, dev, request);

 out_free:
	if (err) {
		drv->scan_req = NULL;
		kfree(request);
	}
 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
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2527 2528 2529
 out_rtnl:
	rtnl_unlock();

2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565
	return err;
}

static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			    struct cfg80211_registered_device *rdev,
			    struct net_device *dev,
			    struct cfg80211_bss *res)
{
	void *hdr;
	struct nlattr *bss;

	hdr = nl80211hdr_put(msg, pid, seq, flags,
			     NL80211_CMD_NEW_SCAN_RESULTS);
	if (!hdr)
		return -1;

	NLA_PUT_U32(msg, NL80211_ATTR_SCAN_GENERATION,
		    rdev->bss_generation);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->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->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);

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2566
	switch (rdev->wiphy.signal_type) {
2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648
	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;
	}

	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 *dev;
	struct net_device *netdev;
	struct cfg80211_internal_bss *scan;
	int ifidx = cb->args[0];
	int start = cb->args[1], idx = 0;
	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;
		cb->args[0] = ifidx;
	}

	netdev = dev_get_by_index(&init_net, ifidx);
	if (!netdev)
		return -ENODEV;

	dev = cfg80211_get_dev_from_ifindex(ifidx);
	if (IS_ERR(dev)) {
		err = PTR_ERR(dev);
		goto out_put_netdev;
	}

	spin_lock_bh(&dev->bss_lock);
	cfg80211_bss_expire(dev);

	list_for_each_entry(scan, &dev->bss_list, list) {
		if (++idx <= start)
			continue;
		if (nl80211_send_bss(skb,
				NETLINK_CB(cb->skb).pid,
				cb->nlh->nlmsg_seq, NLM_F_MULTI,
				dev, netdev, &scan->pub) < 0) {
			idx--;
			goto out;
		}
	}

 out:
	spin_unlock_bh(&dev->bss_lock);

	cb->args[1] = idx;
	err = skb->len;
	cfg80211_put_dev(dev);
 out_put_netdev:
	dev_put(netdev);

	return err;
}

2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685
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,
2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709
		.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,
2710 2711
		.flags = GENL_ADMIN_PERM,
	},
2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729
	{
		.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,
	},
2730 2731 2732
	{
		.cmd = NL80211_CMD_GET_STATION,
		.doit = nl80211_get_station,
2733
		.dumpit = nl80211_dump_station,
2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751
		.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,
2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776
		.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,
2777 2778 2779 2780 2781 2782
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_SET_BSS,
		.doit = nl80211_set_bss,
		.policy = nl80211_policy,
2783 2784
		.flags = GENL_ADMIN_PERM,
	},
2785 2786 2787 2788 2789 2790
	{
		.cmd = NL80211_CMD_GET_REG,
		.doit = nl80211_get_reg,
		.policy = nl80211_policy,
		/* can be retrieved by unprivileged users */
	},
2791 2792 2793 2794 2795 2796 2797 2798 2799 2800
	{
		.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,
2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812
		.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,
2813 2814 2815 2816 2817 2818
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_SET_MGMT_EXTRA_IE,
		.doit = nl80211_set_mgmt_extra_ie,
		.policy = nl80211_policy,
2819 2820
		.flags = GENL_ADMIN_PERM,
	},
2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831
	{
		.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,
	},
2832
};
2833 2834 2835
static struct genl_multicast_group nl80211_mlme_mcgrp = {
	.name = "mlme",
};
2836 2837 2838 2839 2840

/* multicast groups */
static struct genl_multicast_group nl80211_config_mcgrp = {
	.name = "config",
};
2841 2842 2843
static struct genl_multicast_group nl80211_scan_mcgrp = {
	.name = "scan",
};
2844 2845 2846
static struct genl_multicast_group nl80211_regulatory_mcgrp = {
	.name = "regulatory",
};
2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865

/* notification functions */

void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
{
	struct sk_buff *msg;

	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
	if (!msg)
		return;

	if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
		nlmsg_free(msg);
		return;
	}

	genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
}

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static int nl80211_send_scan_donemsg(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;

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	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
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	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);

	/* XXX: we should probably bounce back the request? */

	return genlmsg_end(msg, hdr);

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
}

void nl80211_send_scan_done(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_donemsg(msg, rdev, netdev, 0, 0, 0,
				      NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
		nlmsg_free(msg);
		return;
	}

	genlmsg_multicast(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_GOODSIZE, GFP_KERNEL);
	if (!msg)
		return;

	if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
				      NL80211_CMD_SCAN_ABORTED) < 0) {
		nlmsg_free(msg);
		return;
	}

	genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
}

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/*
 * 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_GOODSIZE, 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;
	}

	genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_KERNEL);

	return;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
	nlmsg_free(msg);
}

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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)
{
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
	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(msg, 0, nl80211_mlme_mcgrp.id, GFP_KERNEL);
	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)
{
	nl80211_send_mlme_event(rdev, netdev, buf, len,
				NL80211_CMD_AUTHENTICATE);
}

void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
			   struct net_device *netdev, const u8 *buf,
			   size_t len)
{
	nl80211_send_mlme_event(rdev, netdev, buf, len, NL80211_CMD_ASSOCIATE);
}

void nl80211_send_rx_deauth(struct cfg80211_registered_device *rdev,
			    struct net_device *netdev, const u8 *buf,
			    size_t len)
{
	nl80211_send_mlme_event(rdev, netdev, buf, len,
				NL80211_CMD_DEAUTHENTICATE);
}

void nl80211_send_rx_disassoc(struct cfg80211_registered_device *rdev,
			      struct net_device *netdev, const u8 *buf,
			      size_t len)
{
	nl80211_send_mlme_event(rdev, netdev, buf, len,
				NL80211_CMD_DISASSOCIATE);
}

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/* initialisation/exit functions */

int nl80211_init(void)
{
	int err, i;

	err = genl_register_family(&nl80211_fam);
	if (err)
		return err;

	for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
		err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
		if (err)
			goto err_out;
	}

	err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
	if (err)
		goto err_out;

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	err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
	if (err)
		goto err_out;

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	err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
	if (err)
		goto err_out;

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	err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
	if (err)
		goto err_out;

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	return 0;
 err_out:
	genl_unregister_family(&nl80211_fam);
	return err;
}

void nl80211_exit(void)
{
	genl_unregister_family(&nl80211_fam);
}