nl80211.c 113.3 KB
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/*
 * This is the new netlink-based wireless configuration interface.
 *
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 * Copyright 2006-2009	Johannes Berg <johannes@sipsolutions.net>
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 */

#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/net_namespace.h>
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#include <net/genetlink.h>
#include <net/cfg80211.h>
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#include <net/sock.h>
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#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,
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	.netnsok = true,
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};

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/* internal helper: get rdev and dev */
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static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
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				       struct cfg80211_registered_device **rdev,
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				       struct net_device **dev)
{
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	struct nlattr **attrs = info->attrs;
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	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(genl_info_net(info), ifindex);
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	if (!*dev)
		return -ENODEV;

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	*rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
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	if (IS_ERR(*rdev)) {
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		dev_put(*dev);
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		return PTR_ERR(*rdev);
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	}

	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,
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				      .len = 20-1 },
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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_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
	[NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
	[NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
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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 },
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	[NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
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	[NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
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	[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_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
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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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	[NL80211_ATTR_SSID] = { .type = NLA_BINARY,
				.len = IEEE80211_MAX_SSID_LEN },
	[NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
	[NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
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	[NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
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	[NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
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	[NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
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	[NL80211_ATTR_STA_FLAGS2] = {
		.len = sizeof(struct nl80211_sta_flag_update),
	},
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	[NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
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	[NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
	[NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
	[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
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	[NL80211_ATTR_PID] = { .type = NLA_U32 },
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};

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/* policy for the attributes */
static struct nla_policy
nl80211_key_policy[NL80211_KEY_MAX + 1] __read_mostly = {
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	[NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
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	[NL80211_KEY_IDX] = { .type = NLA_U8 },
	[NL80211_KEY_CIPHER] = { .type = NLA_U32 },
	[NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
	[NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
	[NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
};

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/* IE validation */
static bool is_valid_ie_attr(const struct nlattr *attr)
{
	const u8 *pos;
	int len;

	if (!attr)
		return true;

	pos = nla_data(attr);
	len = nla_len(attr);

	while (len) {
		u8 elemlen;

		if (len < 2)
			return false;
		len -= 2;

		elemlen = pos[1];
		if (elemlen > len)
			return false;

		len -= elemlen;
		pos += 2 + elemlen;
	}

	return true;
}

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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);
}

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static int nl80211_msg_put_channel(struct sk_buff *msg,
				   struct ieee80211_channel *chan)
{
	NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
		    chan->center_freq);

	if (chan->flags & IEEE80211_CHAN_DISABLED)
		NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
	if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
		NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
		NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
	if (chan->flags & IEEE80211_CHAN_RADAR)
		NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);

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

	return 0;

 nla_put_failure:
	return -ENOBUFS;
}

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/* netlink command implementations */

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struct key_parse {
	struct key_params p;
	int idx;
	bool def, defmgmt;
};

static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
{
	struct nlattr *tb[NL80211_KEY_MAX + 1];
	int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
				   nl80211_key_policy);
	if (err)
		return err;

	k->def = !!tb[NL80211_KEY_DEFAULT];
	k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];

	if (tb[NL80211_KEY_IDX])
		k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);

	if (tb[NL80211_KEY_DATA]) {
		k->p.key = nla_data(tb[NL80211_KEY_DATA]);
		k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
	}

	if (tb[NL80211_KEY_SEQ]) {
		k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
		k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
	}

	if (tb[NL80211_KEY_CIPHER])
		k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);

	return 0;
}

static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
{
	if (info->attrs[NL80211_ATTR_KEY_DATA]) {
		k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
		k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
	}

	if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
		k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
		k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
	}

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

	if (info->attrs[NL80211_ATTR_KEY_CIPHER])
		k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);

	k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
	k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];

	return 0;
}

static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
{
	int err;

	memset(k, 0, sizeof(*k));
	k->idx = -1;

	if (info->attrs[NL80211_ATTR_KEY])
		err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
	else
		err = nl80211_parse_key_old(info, k);

	if (err)
		return err;

	if (k->def && k->defmgmt)
		return -EINVAL;

	if (k->idx != -1) {
		if (k->defmgmt) {
			if (k->idx < 4 || k->idx > 5)
				return -EINVAL;
		} else if (k->def) {
			if (k->idx < 0 || k->idx > 3)
				return -EINVAL;
		} else {
			if (k->idx < 0 || k->idx > 5)
				return -EINVAL;
		}
	}

	return 0;
}

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static struct cfg80211_cached_keys *
nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
		       struct nlattr *keys)
{
	struct key_parse parse;
	struct nlattr *key;
	struct cfg80211_cached_keys *result;
	int rem, err, def = 0;

	result = kzalloc(sizeof(*result), GFP_KERNEL);
	if (!result)
		return ERR_PTR(-ENOMEM);

	result->def = -1;
	result->defmgmt = -1;

	nla_for_each_nested(key, keys, rem) {
		memset(&parse, 0, sizeof(parse));
		parse.idx = -1;

		err = nl80211_parse_key_new(key, &parse);
		if (err)
			goto error;
		err = -EINVAL;
		if (!parse.p.key)
			goto error;
		if (parse.idx < 0 || parse.idx > 4)
			goto error;
		if (parse.def) {
			if (def)
				goto error;
			def = 1;
			result->def = parse.idx;
		} else if (parse.defmgmt)
			goto error;
		err = cfg80211_validate_key_settings(rdev, &parse.p,
						     parse.idx, NULL);
		if (err)
			goto error;
		result->params[parse.idx].cipher = parse.p.cipher;
		result->params[parse.idx].key_len = parse.p.key_len;
		result->params[parse.idx].key = result->data[parse.idx];
		memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
	}

	return result;
 error:
	kfree(result);
	return ERR_PTR(err);
}

static int nl80211_key_allowed(struct wireless_dev *wdev)
{
	ASSERT_WDEV_LOCK(wdev);

	if (!netif_running(wdev->netdev))
		return -ENETDOWN;

	switch (wdev->iftype) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_AP_VLAN:
		break;
	case NL80211_IFTYPE_ADHOC:
		if (!wdev->current_bss)
			return -ENOLINK;
		break;
	case NL80211_IFTYPE_STATION:
		if (wdev->sme_state != CFG80211_SME_CONNECTED)
			return -ENOLINK;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

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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);
409
	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
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	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
		    cfg80211_rdev_list_generation);

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	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
		   dev->wiphy.retry_short);
	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
		   dev->wiphy.retry_long);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
		    dev->wiphy.frag_threshold);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
		    dev->wiphy.rts_threshold);

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	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
		   dev->wiphy.max_scan_ssids);
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	NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
		    dev->wiphy.max_scan_ie_len);
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	NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
		sizeof(u32) * dev->wiphy.n_cipher_suites,
		dev->wiphy.cipher_suites);

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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];
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			if (nl80211_msg_put_channel(msg, chan))
				goto nla_put_failure;
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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);
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	CMD(auth, AUTHENTICATE);
	CMD(assoc, ASSOCIATE);
	CMD(deauth, DEAUTHENTICATE);
	CMD(disassoc, DISASSOCIATE);
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	CMD(join_ibss, JOIN_IBSS);
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	if (dev->wiphy.netnsok) {
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
	}
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#undef CMD
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	if (dev->ops->connect || dev->ops->auth) {
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		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
	}

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	if (dev->ops->disconnect || dev->ops->deauth) {
S
Samuel Ortiz 已提交
556 557 558 559
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
	}

560 561
	nla_nest_end(msg, nl_cmds);

562 563 564
	return genlmsg_end(msg, hdr);

 nla_put_failure:
565 566
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
567 568 569 570 571 572 573 574
}

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;

575
	mutex_lock(&cfg80211_mutex);
576
	list_for_each_entry(dev, &cfg80211_rdev_list, list) {
577 578
		if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
			continue;
579
		if (++idx <= start)
580 581 582
			continue;
		if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
583 584
				       dev) < 0) {
			idx--;
585
			break;
586
		}
587
	}
588
	mutex_unlock(&cfg80211_mutex);
589 590 591 592 593 594 595 596 597 598 599 600 601 602 603

	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);

604
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
605 606 607 608 609 610
	if (!msg)
		goto out_err;

	if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
		goto out_free;

611
	cfg80211_unlock_rdev(dev);
612

J
Johannes Berg 已提交
613
	return genlmsg_reply(msg, info);
614 615 616 617

 out_free:
	nlmsg_free(msg);
 out_err:
618
	cfg80211_unlock_rdev(dev);
619 620 621
	return -ENOBUFS;
}

622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646
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;
}

647 648 649
static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
650 651
	int result = 0, rem_txq_params = 0;
	struct nlattr *nl_txq_params;
652 653 654
	u32 changed;
	u8 retry_short = 0, retry_long = 0;
	u32 frag_threshold = 0, rts_threshold = 0;
655

656
	rtnl_lock();
657

658 659
	mutex_lock(&cfg80211_mutex);

660
	rdev = __cfg80211_rdev_from_info(info);
661
	if (IS_ERR(rdev)) {
662
		mutex_unlock(&cfg80211_mutex);
663 664 665 666 667 668 669
		result = PTR_ERR(rdev);
		goto unlock;
	}

	mutex_lock(&rdev->mtx);

	if (info->attrs[NL80211_ATTR_WIPHY_NAME])
670 671
		result = cfg80211_dev_rename(
			rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
672 673 674 675 676

	mutex_unlock(&cfg80211_mutex);

	if (result)
		goto bad_res;
677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703

	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;
		}
	}
704

705
	if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
S
Sujith 已提交
706
		enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
707
		u32 freq;
708

709 710
		result = -EINVAL;

S
Sujith 已提交
711 712 713 714 715 716 717
		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)
718 719 720 721
				goto bad_res;
		}

		freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
722

723
		mutex_lock(&rdev->devlist_mtx);
724
		result = rdev_set_freq(rdev, NULL, freq, channel_type);
725
		mutex_unlock(&rdev->devlist_mtx);
726 727 728 729
		if (result)
			goto bad_res;
	}

730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807
	changed = 0;

	if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
		retry_short = nla_get_u8(
			info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
		if (retry_short == 0) {
			result = -EINVAL;
			goto bad_res;
		}
		changed |= WIPHY_PARAM_RETRY_SHORT;
	}

	if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
		retry_long = nla_get_u8(
			info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
		if (retry_long == 0) {
			result = -EINVAL;
			goto bad_res;
		}
		changed |= WIPHY_PARAM_RETRY_LONG;
	}

	if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
		frag_threshold = nla_get_u32(
			info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
		if (frag_threshold < 256) {
			result = -EINVAL;
			goto bad_res;
		}
		if (frag_threshold != (u32) -1) {
			/*
			 * Fragments (apart from the last one) are required to
			 * have even length. Make the fragmentation code
			 * simpler by stripping LSB should someone try to use
			 * odd threshold value.
			 */
			frag_threshold &= ~0x1;
		}
		changed |= WIPHY_PARAM_FRAG_THRESHOLD;
	}

	if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
		rts_threshold = nla_get_u32(
			info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
		changed |= WIPHY_PARAM_RTS_THRESHOLD;
	}

	if (changed) {
		u8 old_retry_short, old_retry_long;
		u32 old_frag_threshold, old_rts_threshold;

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

		old_retry_short = rdev->wiphy.retry_short;
		old_retry_long = rdev->wiphy.retry_long;
		old_frag_threshold = rdev->wiphy.frag_threshold;
		old_rts_threshold = rdev->wiphy.rts_threshold;

		if (changed & WIPHY_PARAM_RETRY_SHORT)
			rdev->wiphy.retry_short = retry_short;
		if (changed & WIPHY_PARAM_RETRY_LONG)
			rdev->wiphy.retry_long = retry_long;
		if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
			rdev->wiphy.frag_threshold = frag_threshold;
		if (changed & WIPHY_PARAM_RTS_THRESHOLD)
			rdev->wiphy.rts_threshold = rts_threshold;

		result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
		if (result) {
			rdev->wiphy.retry_short = old_retry_short;
			rdev->wiphy.retry_long = old_retry_long;
			rdev->wiphy.frag_threshold = old_frag_threshold;
			rdev->wiphy.rts_threshold = old_rts_threshold;
		}
	}
808

809
 bad_res:
810 811 812
	mutex_unlock(&rdev->mtx);
 unlock:
	rtnl_unlock();
813 814 815 816 817
	return result;
}


static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
818
			      struct cfg80211_registered_device *rdev,
819 820 821 822 823 824 825 826 827
			      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);
828
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
829
	NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
J
Johannes Berg 已提交
830
	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
831 832 833 834 835

	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
		    rdev->devlist_generation ^
			(cfg80211_rdev_list_generation << 2));

836 837 838
	return genlmsg_end(msg, hdr);

 nla_put_failure:
839 840
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
841 842 843 844 845 846 847 848
}

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];
849
	struct cfg80211_registered_device *rdev;
850 851
	struct wireless_dev *wdev;

852
	mutex_lock(&cfg80211_mutex);
853 854
	list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
		if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
855
			continue;
J
Johannes Berg 已提交
856 857
		if (wp_idx < wp_start) {
			wp_idx++;
858
			continue;
J
Johannes Berg 已提交
859
		}
860 861
		if_idx = 0;

862 863
		mutex_lock(&rdev->devlist_mtx);
		list_for_each_entry(wdev, &rdev->netdev_list, list) {
J
Johannes Berg 已提交
864 865
			if (if_idx < if_start) {
				if_idx++;
866
				continue;
J
Johannes Berg 已提交
867
			}
868 869
			if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
					       cb->nlh->nlmsg_seq, NLM_F_MULTI,
870 871
					       rdev, wdev->netdev) < 0) {
				mutex_unlock(&rdev->devlist_mtx);
J
Johannes Berg 已提交
872 873 874
				goto out;
			}
			if_idx++;
875
		}
876
		mutex_unlock(&rdev->devlist_mtx);
J
Johannes Berg 已提交
877 878

		wp_idx++;
879
	}
J
Johannes Berg 已提交
880
 out:
881
	mutex_unlock(&cfg80211_mutex);
882 883 884 885 886 887 888 889 890 891 892 893 894 895

	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;

896
	err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
897 898 899
	if (err)
		return err;

900
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
901 902 903
	if (!msg)
		goto out_err;

904 905
	if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
			       dev, netdev) < 0)
906 907 908
		goto out_free;

	dev_put(netdev);
909
	cfg80211_unlock_rdev(dev);
910

J
Johannes Berg 已提交
911
	return genlmsg_reply(msg, info);
912 913 914 915 916

 out_free:
	nlmsg_free(msg);
 out_err:
	dev_put(netdev);
917
	cfg80211_unlock_rdev(dev);
918 919 920
	return -ENOBUFS;
}

921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
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;
}

950 951
static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
{
952
	struct cfg80211_registered_device *rdev;
953
	struct vif_params params;
954
	int err;
J
Johannes Berg 已提交
955
	enum nl80211_iftype otype, ntype;
956
	struct net_device *dev;
957
	u32 _flags, *flags = NULL;
958
	bool change = false;
959

960 961
	memset(&params, 0, sizeof(params));

J
Johannes Berg 已提交
962 963
	rtnl_lock();

964
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
965
	if (err)
J
Johannes Berg 已提交
966 967
		goto unlock_rtnl;

J
Johannes Berg 已提交
968
	otype = ntype = dev->ieee80211_ptr->iftype;
969

970
	if (info->attrs[NL80211_ATTR_IFTYPE]) {
971
		ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
J
Johannes Berg 已提交
972
		if (otype != ntype)
973
			change = true;
J
Johannes Berg 已提交
974
		if (ntype > NL80211_IFTYPE_MAX) {
975
			err = -EINVAL;
976
			goto unlock;
977
		}
978 979
	}

980
	if (info->attrs[NL80211_ATTR_MESH_ID]) {
J
Johannes Berg 已提交
981
		if (ntype != NL80211_IFTYPE_MESH_POINT) {
982 983 984
			err = -EINVAL;
			goto unlock;
		}
985 986
		params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
		params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
987
		change = true;
988 989
	}

990
	if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
J
Johannes Berg 已提交
991
		if (ntype != NL80211_IFTYPE_MONITOR) {
992 993 994 995 996
			err = -EINVAL;
			goto unlock;
		}
		err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
					  &_flags);
997 998 999 1000 1001
		if (err)
			goto unlock;

		flags = &_flags;
		change = true;
1002
	}
J
Johannes Berg 已提交
1003

1004
	if (change)
1005
		err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1006 1007
	else
		err = 0;
J
Johannes Berg 已提交
1008

1009
 unlock:
1010
	dev_put(dev);
1011
	cfg80211_unlock_rdev(rdev);
J
Johannes Berg 已提交
1012 1013
 unlock_rtnl:
	rtnl_unlock();
1014 1015 1016 1017 1018
	return err;
}

static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
{
1019
	struct cfg80211_registered_device *rdev;
1020
	struct vif_params params;
1021 1022
	int err;
	enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1023
	u32 flags;
1024

1025 1026
	memset(&params, 0, sizeof(params));

1027 1028 1029 1030 1031 1032 1033 1034 1035
	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;
	}

J
Johannes Berg 已提交
1036 1037
	rtnl_lock();

1038 1039 1040
	rdev = cfg80211_get_dev_from_info(info);
	if (IS_ERR(rdev)) {
		err = PTR_ERR(rdev);
J
Johannes Berg 已提交
1041 1042
		goto unlock_rtnl;
	}
1043

1044 1045
	if (!rdev->ops->add_virtual_intf ||
	    !(rdev->wiphy.interface_modes & (1 << type))) {
1046 1047 1048 1049
		err = -EOPNOTSUPP;
		goto unlock;
	}

1050 1051 1052 1053 1054 1055
	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]);
	}

1056 1057 1058
	err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
				  info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
				  &flags);
1059
	err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1060
		nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1061 1062
		type, err ? NULL : &flags, &params);

1063
 unlock:
1064
	cfg80211_unlock_rdev(rdev);
J
Johannes Berg 已提交
1065 1066
 unlock_rtnl:
	rtnl_unlock();
1067 1068 1069 1070 1071
	return err;
}

static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
{
1072
	struct cfg80211_registered_device *rdev;
1073
	int err;
1074 1075
	struct net_device *dev;

J
Johannes Berg 已提交
1076 1077
	rtnl_lock();

1078
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1079
	if (err)
J
Johannes Berg 已提交
1080
		goto unlock_rtnl;
1081

1082
	if (!rdev->ops->del_virtual_intf) {
1083 1084 1085 1086
		err = -EOPNOTSUPP;
		goto out;
	}

1087
	err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1088 1089

 out:
1090
	cfg80211_unlock_rdev(rdev);
1091
	dev_put(dev);
J
Johannes Berg 已提交
1092 1093
 unlock_rtnl:
	rtnl_unlock();
1094 1095 1096
	return err;
}

1097 1098 1099
struct get_key_cookie {
	struct sk_buff *msg;
	int error;
1100
	int idx;
1101 1102 1103 1104
};

static void get_key_callback(void *c, struct key_params *params)
{
1105
	struct nlattr *key;
1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119
	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);

1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139
	key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
	if (!key)
		goto nla_put_failure;

	if (params->key)
		NLA_PUT(cookie->msg, NL80211_KEY_DATA,
			params->key_len, params->key);

	if (params->seq)
		NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
			params->seq_len, params->seq);

	if (params->cipher)
		NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
			    params->cipher);

	NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);

	nla_nest_end(cookie->msg, key);

1140 1141 1142 1143 1144 1145 1146
	return;
 nla_put_failure:
	cookie->error = 1;
}

static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
{
1147
	struct cfg80211_registered_device *rdev;
1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160
	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]);

1161
	if (key_idx > 5)
1162 1163 1164 1165 1166
		return -EINVAL;

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

J
Johannes Berg 已提交
1167 1168
	rtnl_lock();

1169
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1170
	if (err)
J
Johannes Berg 已提交
1171
		goto unlock_rtnl;
1172

1173
	if (!rdev->ops->get_key) {
1174 1175 1176 1177
		err = -EOPNOTSUPP;
		goto out;
	}

1178
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1179 1180 1181 1182 1183 1184 1185 1186 1187 1188
	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);
N
Niko Jokinen 已提交
1189
		goto free_msg;
1190 1191 1192
	}

	cookie.msg = msg;
1193
	cookie.idx = key_idx;
1194 1195 1196 1197 1198 1199

	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);

1200
	err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1201 1202 1203
				&cookie, get_key_callback);

	if (err)
N
Niko Jokinen 已提交
1204
		goto free_msg;
1205 1206 1207 1208 1209

	if (cookie.error)
		goto nla_put_failure;

	genlmsg_end(msg, hdr);
J
Johannes Berg 已提交
1210
	err = genlmsg_reply(msg, info);
1211 1212 1213 1214
	goto out;

 nla_put_failure:
	err = -ENOBUFS;
N
Niko Jokinen 已提交
1215
 free_msg:
1216 1217
	nlmsg_free(msg);
 out:
1218
	cfg80211_unlock_rdev(rdev);
1219
	dev_put(dev);
J
Johannes Berg 已提交
1220 1221 1222
 unlock_rtnl:
	rtnl_unlock();

1223 1224 1225 1226 1227
	return err;
}

static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
{
1228
	struct cfg80211_registered_device *rdev;
1229
	struct key_parse key;
1230 1231
	int err;
	struct net_device *dev;
1232 1233
	int (*func)(struct wiphy *wiphy, struct net_device *netdev,
		    u8 key_index);
1234

1235 1236 1237
	err = nl80211_parse_key(info, &key);
	if (err)
		return err;
1238

1239
	if (key.idx < 0)
1240 1241
		return -EINVAL;

1242 1243
	/* only support setting default key */
	if (!key.def && !key.defmgmt)
1244 1245
		return -EINVAL;

J
Johannes Berg 已提交
1246 1247
	rtnl_lock();

1248
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1249
	if (err)
J
Johannes Berg 已提交
1250
		goto unlock_rtnl;
1251

1252
	if (key.def)
1253
		func = rdev->ops->set_default_key;
1254
	else
1255
		func = rdev->ops->set_default_mgmt_key;
1256 1257

	if (!func) {
1258 1259 1260 1261
		err = -EOPNOTSUPP;
		goto out;
	}

J
Johannes Berg 已提交
1262 1263 1264 1265 1266
	wdev_lock(dev->ieee80211_ptr);
	err = nl80211_key_allowed(dev->ieee80211_ptr);
	if (!err)
		err = func(&rdev->wiphy, dev, key.idx);

1267 1268
#ifdef CONFIG_WIRELESS_EXT
	if (!err) {
1269
		if (func == rdev->ops->set_default_key)
1270
			dev->ieee80211_ptr->wext.default_key = key.idx;
1271
		else
1272
			dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1273 1274
	}
#endif
J
Johannes Berg 已提交
1275
	wdev_unlock(dev->ieee80211_ptr);
1276 1277

 out:
1278
	cfg80211_unlock_rdev(rdev);
1279
	dev_put(dev);
J
Johannes Berg 已提交
1280 1281 1282 1283

 unlock_rtnl:
	rtnl_unlock();

1284 1285 1286 1287 1288
	return err;
}

static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
{
1289
	struct cfg80211_registered_device *rdev;
J
Johannes Berg 已提交
1290
	int err;
1291
	struct net_device *dev;
1292
	struct key_parse key;
1293 1294
	u8 *mac_addr = NULL;

1295 1296 1297
	err = nl80211_parse_key(info, &key);
	if (err)
		return err;
1298

1299
	if (!key.p.key)
1300 1301 1302 1303 1304
		return -EINVAL;

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

J
Johannes Berg 已提交
1305 1306
	rtnl_lock();

1307
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1308
	if (err)
J
Johannes Berg 已提交
1309
		goto unlock_rtnl;
1310

J
Johannes Berg 已提交
1311 1312
	if (!rdev->ops->add_key) {
		err = -EOPNOTSUPP;
1313 1314 1315
		goto out;
	}

J
Johannes Berg 已提交
1316 1317
	if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
		err = -EINVAL;
1318 1319 1320
		goto out;
	}

J
Johannes Berg 已提交
1321 1322 1323 1324 1325 1326
	wdev_lock(dev->ieee80211_ptr);
	err = nl80211_key_allowed(dev->ieee80211_ptr);
	if (!err)
		err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
					 mac_addr, &key.p);
	wdev_unlock(dev->ieee80211_ptr);
1327 1328

 out:
1329
	cfg80211_unlock_rdev(rdev);
1330
	dev_put(dev);
J
Johannes Berg 已提交
1331 1332 1333
 unlock_rtnl:
	rtnl_unlock();

1334 1335 1336 1337 1338
	return err;
}

static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
{
1339
	struct cfg80211_registered_device *rdev;
1340 1341 1342
	int err;
	struct net_device *dev;
	u8 *mac_addr = NULL;
1343
	struct key_parse key;
1344

1345 1346 1347
	err = nl80211_parse_key(info, &key);
	if (err)
		return err;
1348 1349 1350 1351

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

J
Johannes Berg 已提交
1352 1353
	rtnl_lock();

1354
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1355
	if (err)
J
Johannes Berg 已提交
1356
		goto unlock_rtnl;
1357

1358
	if (!rdev->ops->del_key) {
1359 1360 1361 1362
		err = -EOPNOTSUPP;
		goto out;
	}

J
Johannes Berg 已提交
1363 1364 1365 1366
	wdev_lock(dev->ieee80211_ptr);
	err = nl80211_key_allowed(dev->ieee80211_ptr);
	if (!err)
		err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1367

1368 1369
#ifdef CONFIG_WIRELESS_EXT
	if (!err) {
1370
		if (key.idx == dev->ieee80211_ptr->wext.default_key)
1371
			dev->ieee80211_ptr->wext.default_key = -1;
1372
		else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1373 1374 1375
			dev->ieee80211_ptr->wext.default_mgmt_key = -1;
	}
#endif
J
Johannes Berg 已提交
1376
	wdev_unlock(dev->ieee80211_ptr);
1377

1378
 out:
1379
	cfg80211_unlock_rdev(rdev);
1380
	dev_put(dev);
J
Johannes Berg 已提交
1381 1382 1383 1384

 unlock_rtnl:
	rtnl_unlock();

1385 1386 1387
	return err;
}

1388 1389 1390 1391
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);
1392
	struct cfg80211_registered_device *rdev;
1393 1394 1395 1396 1397
	int err;
	struct net_device *dev;
	struct beacon_parameters params;
	int haveinfo = 0;

1398 1399 1400
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
		return -EINVAL;

J
Johannes Berg 已提交
1401 1402
	rtnl_lock();

1403
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1404
	if (err)
J
Johannes Berg 已提交
1405
		goto unlock_rtnl;
1406

1407 1408 1409 1410 1411
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
		err = -EOPNOTSUPP;
		goto out;
	}

1412 1413 1414 1415 1416 1417 1418 1419 1420 1421
	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;
		}

1422
		call = rdev->ops->add_beacon;
1423 1424
		break;
	case NL80211_CMD_SET_BEACON:
1425
		call = rdev->ops->set_beacon;
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 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470
		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;
	}

1471
	err = call(&rdev->wiphy, dev, &params);
1472 1473

 out:
1474
	cfg80211_unlock_rdev(rdev);
1475
	dev_put(dev);
J
Johannes Berg 已提交
1476 1477 1478
 unlock_rtnl:
	rtnl_unlock();

1479 1480 1481 1482 1483
	return err;
}

static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
{
1484
	struct cfg80211_registered_device *rdev;
1485 1486 1487
	int err;
	struct net_device *dev;

J
Johannes Berg 已提交
1488 1489
	rtnl_lock();

1490
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1491
	if (err)
J
Johannes Berg 已提交
1492
		goto unlock_rtnl;
1493

1494
	if (!rdev->ops->del_beacon) {
1495 1496 1497 1498
		err = -EOPNOTSUPP;
		goto out;
	}

1499 1500 1501 1502
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
		err = -EOPNOTSUPP;
		goto out;
	}
1503
	err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1504 1505

 out:
1506
	cfg80211_unlock_rdev(rdev);
1507
	dev_put(dev);
J
Johannes Berg 已提交
1508 1509 1510
 unlock_rtnl:
	rtnl_unlock();

1511 1512 1513
	return err;
}

1514 1515 1516 1517
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 },
1518
	[NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1519 1520
};

1521 1522
static int parse_station_flags(struct genl_info *info,
			       struct station_parameters *params)
1523 1524
{
	struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1525
	struct nlattr *nla;
1526 1527
	int flag;

1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545
	/*
	 * Try parsing the new attribute first so userspace
	 * can specify both for older kernels.
	 */
	nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
	if (nla) {
		struct nl80211_sta_flag_update *sta_flags;

		sta_flags = nla_data(nla);
		params->sta_flags_mask = sta_flags->mask;
		params->sta_flags_set = sta_flags->set;
		if ((params->sta_flags_mask |
		     params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
			return -EINVAL;
		return 0;
	}

	/* if present, parse the old attribute */
1546

1547
	nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1548 1549 1550 1551 1552 1553 1554
	if (!nla)
		return 0;

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

1555 1556
	params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
	params->sta_flags_mask &= ~1;
1557 1558 1559

	for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
		if (flags[flag])
1560
			params->sta_flags_set |= (1<<flag);
1561 1562 1563 1564

	return 0;
}

1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597
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;
}

1598 1599
static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
				int flags, struct net_device *dev,
1600
				u8 *mac_addr, struct station_info *sinfo)
1601 1602
{
	void *hdr;
1603 1604
	struct nlattr *sinfoattr, *txrate;
	u16 bitrate;
1605 1606 1607 1608 1609 1610 1611 1612

	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);

1613 1614
	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);

1615 1616
	sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
	if (!sinfoattr)
1617
		goto nla_put_failure;
1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635
	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);
1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647
	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);
1648

1649 1650 1651 1652 1653 1654 1655 1656 1657 1658
		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);
	}
1659 1660 1661 1662 1663 1664
	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);
1665
	nla_nest_end(msg, sinfoattr);
1666 1667 1668 1669

	return genlmsg_end(msg, hdr);

 nla_put_failure:
1670 1671
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
1672 1673
}

1674
static int nl80211_dump_station(struct sk_buff *skb,
J
Johannes Berg 已提交
1675
				struct netlink_callback *cb)
1676 1677 1678
{
	struct station_info sinfo;
	struct cfg80211_registered_device *dev;
J
Johannes Berg 已提交
1679
	struct net_device *netdev;
1680
	u8 mac_addr[ETH_ALEN];
J
Johannes Berg 已提交
1681 1682
	int ifidx = cb->args[0];
	int sta_idx = cb->args[1];
1683 1684
	int err;

J
Johannes Berg 已提交
1685 1686 1687 1688 1689 1690
	if (!ifidx) {
		err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
				  nl80211_fam.attrbuf, nl80211_fam.maxattr,
				  nl80211_policy);
		if (err)
			return err;
1691

J
Johannes Berg 已提交
1692 1693
		if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
			return -EINVAL;
1694

J
Johannes Berg 已提交
1695 1696 1697
		ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
		if (!ifidx)
			return -EINVAL;
1698 1699
	}

J
Johannes Berg 已提交
1700 1701
	rtnl_lock();

1702
	netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
J
Johannes Berg 已提交
1703 1704 1705 1706
	if (!netdev) {
		err = -ENODEV;
		goto out_rtnl;
	}
1707

1708
	dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
J
Johannes Berg 已提交
1709 1710
	if (IS_ERR(dev)) {
		err = PTR_ERR(dev);
J
Johannes Berg 已提交
1711
		goto out_rtnl;
J
Johannes Berg 已提交
1712 1713 1714
	}

	if (!dev->ops->dump_station) {
1715
		err = -EOPNOTSUPP;
J
Johannes Berg 已提交
1716 1717 1718 1719 1720 1721 1722 1723 1724
		goto out_err;
	}

	while (1) {
		err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
					     mac_addr, &sinfo);
		if (err == -ENOENT)
			break;
		if (err)
J
Johannes Berg 已提交
1725
			goto out_err;
J
Johannes Berg 已提交
1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741

		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:
1742
	cfg80211_unlock_rdev(dev);
J
Johannes Berg 已提交
1743 1744
 out_rtnl:
	rtnl_unlock();
J
Johannes Berg 已提交
1745 1746

	return err;
1747
}
1748

1749 1750
static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
{
1751
	struct cfg80211_registered_device *rdev;
1752 1753
	int err;
	struct net_device *dev;
1754
	struct station_info sinfo;
1755 1756 1757
	struct sk_buff *msg;
	u8 *mac_addr = NULL;

1758
	memset(&sinfo, 0, sizeof(sinfo));
1759 1760 1761 1762 1763 1764

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

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

J
Johannes Berg 已提交
1765 1766
	rtnl_lock();

1767
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1768
	if (err)
J
Johannes Berg 已提交
1769
		goto out_rtnl;
1770

1771
	if (!rdev->ops->get_station) {
1772 1773 1774 1775
		err = -EOPNOTSUPP;
		goto out;
	}

1776
	err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1777 1778 1779
	if (err)
		goto out;

1780
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1781 1782 1783 1784
	if (!msg)
		goto out;

	if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1785
				 dev, mac_addr, &sinfo) < 0)
1786 1787
		goto out_free;

J
Johannes Berg 已提交
1788
	err = genlmsg_reply(msg, info);
1789 1790 1791 1792 1793
	goto out;

 out_free:
	nlmsg_free(msg);
 out:
1794
	cfg80211_unlock_rdev(rdev);
1795
	dev_put(dev);
J
Johannes Berg 已提交
1796 1797 1798
 out_rtnl:
	rtnl_unlock();

1799
	return err;
1800 1801 1802 1803 1804
}

/*
 * Get vlan interface making sure it is on the right wiphy.
 */
1805
static int get_vlan(struct genl_info *info,
1806 1807 1808
		    struct cfg80211_registered_device *rdev,
		    struct net_device **vlan)
{
1809
	struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1810 1811 1812
	*vlan = NULL;

	if (vlanattr) {
1813 1814
		*vlan = dev_get_by_index(genl_info_net(info),
					 nla_get_u32(vlanattr));
1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826
		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)
{
1827
	struct cfg80211_registered_device *rdev;
1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855
	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]);

1856 1857 1858 1859
	if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
		params.ht_capa =
			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);

1860
	if (parse_station_flags(info, &params))
1861 1862
		return -EINVAL;

1863 1864 1865 1866
	if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
		params.plink_action =
		    nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);

J
Johannes Berg 已提交
1867 1868
	rtnl_lock();

1869
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1870
	if (err)
J
Johannes Berg 已提交
1871
		goto out_rtnl;
1872

1873
	err = get_vlan(info, rdev, &params.vlan);
1874
	if (err)
1875
		goto out;
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916

	/* validate settings */
	err = 0;

	switch (dev->ieee80211_ptr->iftype) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_AP_VLAN:
		/* disallow mesh-specific things */
		if (params.plink_action)
			err = -EINVAL;
		break;
	case NL80211_IFTYPE_STATION:
		/* disallow everything but AUTHORIZED flag */
		if (params.plink_action)
			err = -EINVAL;
		if (params.vlan)
			err = -EINVAL;
		if (params.supported_rates)
			err = -EINVAL;
		if (params.ht_capa)
			err = -EINVAL;
		if (params.listen_interval >= 0)
			err = -EINVAL;
		if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
			err = -EINVAL;
		break;
	case NL80211_IFTYPE_MESH_POINT:
		/* disallow things mesh doesn't support */
		if (params.vlan)
			err = -EINVAL;
		if (params.ht_capa)
			err = -EINVAL;
		if (params.listen_interval >= 0)
			err = -EINVAL;
		if (params.supported_rates)
			err = -EINVAL;
		if (params.sta_flags_mask)
			err = -EINVAL;
		break;
	default:
		err = -EINVAL;
1917 1918
	}

1919 1920 1921
	if (err)
		goto out;

1922
	if (!rdev->ops->change_station) {
1923 1924 1925 1926
		err = -EOPNOTSUPP;
		goto out;
	}

1927
	err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
1928 1929 1930 1931

 out:
	if (params.vlan)
		dev_put(params.vlan);
1932
	cfg80211_unlock_rdev(rdev);
1933
	dev_put(dev);
J
Johannes Berg 已提交
1934 1935 1936
 out_rtnl:
	rtnl_unlock();

1937 1938 1939 1940 1941
	return err;
}

static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
{
1942
	struct cfg80211_registered_device *rdev;
1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965
	int err;
	struct net_device *dev;
	struct station_parameters params;
	u8 *mac_addr = NULL;

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

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

	if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
		return -EINVAL;

	if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
		return -EINVAL;

	mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
	params.supported_rates =
		nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
	params.supported_rates_len =
		nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
	params.listen_interval =
		nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1966

1967 1968 1969 1970 1971
	if (info->attrs[NL80211_ATTR_STA_AID]) {
		params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
		if (!params.aid || params.aid > IEEE80211_MAX_AID)
			return -EINVAL;
	}
1972

1973 1974 1975
	if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
		params.ht_capa =
			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1976

1977
	if (parse_station_flags(info, &params))
1978 1979
		return -EINVAL;

J
Johannes Berg 已提交
1980 1981
	rtnl_lock();

1982
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1983
	if (err)
J
Johannes Berg 已提交
1984
		goto out_rtnl;
1985

1986
	err = get_vlan(info, rdev, &params.vlan);
1987
	if (err)
1988
		goto out;
1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016

	/* validate settings */
	err = 0;

	switch (dev->ieee80211_ptr->iftype) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_AP_VLAN:
		/* all ok but must have AID */
		if (!params.aid)
			err = -EINVAL;
		break;
	case NL80211_IFTYPE_MESH_POINT:
		/* disallow things mesh doesn't support */
		if (params.vlan)
			err = -EINVAL;
		if (params.aid)
			err = -EINVAL;
		if (params.ht_capa)
			err = -EINVAL;
		if (params.listen_interval >= 0)
			err = -EINVAL;
		if (params.supported_rates)
			err = -EINVAL;
		if (params.sta_flags_mask)
			err = -EINVAL;
		break;
	default:
		err = -EINVAL;
2017 2018
	}

2019 2020 2021
	if (err)
		goto out;

2022
	if (!rdev->ops->add_station) {
2023 2024 2025 2026
		err = -EOPNOTSUPP;
		goto out;
	}

2027 2028 2029 2030 2031
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

2032
	err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2033 2034 2035 2036

 out:
	if (params.vlan)
		dev_put(params.vlan);
2037
	cfg80211_unlock_rdev(rdev);
2038
	dev_put(dev);
J
Johannes Berg 已提交
2039 2040 2041
 out_rtnl:
	rtnl_unlock();

2042 2043 2044 2045 2046
	return err;
}

static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
{
2047
	struct cfg80211_registered_device *rdev;
2048 2049 2050 2051 2052 2053 2054
	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]);

J
Johannes Berg 已提交
2055 2056
	rtnl_lock();

2057
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2058
	if (err)
J
Johannes Berg 已提交
2059
		goto out_rtnl;
2060

2061
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2062 2063
	    dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
	    dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2064 2065 2066 2067
		err = -EINVAL;
		goto out;
	}

2068
	if (!rdev->ops->del_station) {
2069 2070 2071 2072
		err = -EOPNOTSUPP;
		goto out;
	}

2073
	err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2074 2075

 out:
2076
	cfg80211_unlock_rdev(rdev);
2077
	dev_put(dev);
J
Johannes Berg 已提交
2078 2079 2080
 out_rtnl:
	rtnl_unlock();

2081 2082 2083
	return err;
}

2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099
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);

2100 2101
	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);

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
	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:
2132 2133
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
2134 2135 2136
}

static int nl80211_dump_mpath(struct sk_buff *skb,
J
Johannes Berg 已提交
2137
			      struct netlink_callback *cb)
2138 2139 2140
{
	struct mpath_info pinfo;
	struct cfg80211_registered_device *dev;
J
Johannes Berg 已提交
2141
	struct net_device *netdev;
2142 2143
	u8 dst[ETH_ALEN];
	u8 next_hop[ETH_ALEN];
J
Johannes Berg 已提交
2144 2145
	int ifidx = cb->args[0];
	int path_idx = cb->args[1];
2146 2147
	int err;

J
Johannes Berg 已提交
2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162
	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;
	}

J
Johannes Berg 已提交
2163 2164
	rtnl_lock();

2165
	netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
J
Johannes Berg 已提交
2166 2167 2168 2169
	if (!netdev) {
		err = -ENODEV;
		goto out_rtnl;
	}
J
Johannes Berg 已提交
2170

2171
	dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
J
Johannes Berg 已提交
2172 2173
	if (IS_ERR(dev)) {
		err = PTR_ERR(dev);
J
Johannes Berg 已提交
2174
		goto out_rtnl;
J
Johannes Berg 已提交
2175 2176 2177
	}

	if (!dev->ops->dump_mpath) {
2178
		err = -EOPNOTSUPP;
J
Johannes Berg 已提交
2179 2180 2181
		goto out_err;
	}

2182 2183
	if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
		err = -EOPNOTSUPP;
2184
		goto out_err;
2185 2186
	}

J
Johannes Berg 已提交
2187 2188 2189 2190
	while (1) {
		err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
					   dst, next_hop, &pinfo);
		if (err == -ENOENT)
2191
			break;
J
Johannes Berg 已提交
2192
		if (err)
J
Johannes Berg 已提交
2193
			goto out_err;
2194

J
Johannes Berg 已提交
2195 2196 2197 2198 2199
		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;
2200

J
Johannes Berg 已提交
2201
		path_idx++;
2202 2203 2204
	}


J
Johannes Berg 已提交
2205 2206 2207 2208
 out:
	cb->args[1] = path_idx;
	err = skb->len;
 out_err:
2209
	cfg80211_unlock_rdev(dev);
J
Johannes Berg 已提交
2210 2211
 out_rtnl:
	rtnl_unlock();
J
Johannes Berg 已提交
2212 2213

	return err;
2214 2215 2216 2217
}

static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
{
2218
	struct cfg80211_registered_device *rdev;
2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232
	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]);

J
Johannes Berg 已提交
2233 2234
	rtnl_lock();

2235
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2236
	if (err)
J
Johannes Berg 已提交
2237
		goto out_rtnl;
2238

2239
	if (!rdev->ops->get_mpath) {
2240 2241 2242 2243
		err = -EOPNOTSUPP;
		goto out;
	}

2244 2245 2246 2247 2248
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
		err = -EOPNOTSUPP;
		goto out;
	}

2249
	err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2250 2251 2252
	if (err)
		goto out;

2253
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2254 2255 2256 2257 2258 2259 2260
	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;

J
Johannes Berg 已提交
2261
	err = genlmsg_reply(msg, info);
2262 2263 2264 2265 2266
	goto out;

 out_free:
	nlmsg_free(msg);
 out:
2267
	cfg80211_unlock_rdev(rdev);
2268
	dev_put(dev);
J
Johannes Berg 已提交
2269 2270 2271
 out_rtnl:
	rtnl_unlock();

2272 2273 2274 2275 2276
	return err;
}

static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
{
2277
	struct cfg80211_registered_device *rdev;
2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291
	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]);

J
Johannes Berg 已提交
2292 2293
	rtnl_lock();

2294
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2295
	if (err)
J
Johannes Berg 已提交
2296
		goto out_rtnl;
2297

2298
	if (!rdev->ops->change_mpath) {
2299 2300 2301 2302
		err = -EOPNOTSUPP;
		goto out;
	}

2303 2304 2305 2306 2307
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
		err = -EOPNOTSUPP;
		goto out;
	}

2308 2309 2310 2311 2312
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

2313
	err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2314 2315

 out:
2316
	cfg80211_unlock_rdev(rdev);
2317
	dev_put(dev);
J
Johannes Berg 已提交
2318 2319 2320
 out_rtnl:
	rtnl_unlock();

2321 2322 2323 2324
	return err;
}
static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
{
2325
	struct cfg80211_registered_device *rdev;
2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339
	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]);

J
Johannes Berg 已提交
2340 2341
	rtnl_lock();

2342
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2343
	if (err)
J
Johannes Berg 已提交
2344
		goto out_rtnl;
2345

2346
	if (!rdev->ops->add_mpath) {
2347 2348 2349 2350
		err = -EOPNOTSUPP;
		goto out;
	}

2351 2352 2353 2354 2355
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
		err = -EOPNOTSUPP;
		goto out;
	}

2356 2357 2358 2359 2360
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

2361
	err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2362 2363

 out:
2364
	cfg80211_unlock_rdev(rdev);
2365
	dev_put(dev);
J
Johannes Berg 已提交
2366 2367 2368
 out_rtnl:
	rtnl_unlock();

2369 2370 2371 2372 2373
	return err;
}

static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
{
2374
	struct cfg80211_registered_device *rdev;
2375 2376 2377 2378 2379 2380 2381
	int err;
	struct net_device *dev;
	u8 *dst = NULL;

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

J
Johannes Berg 已提交
2382 2383
	rtnl_lock();

2384
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2385
	if (err)
J
Johannes Berg 已提交
2386
		goto out_rtnl;
2387

2388
	if (!rdev->ops->del_mpath) {
2389 2390 2391 2392
		err = -EOPNOTSUPP;
		goto out;
	}

2393
	err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2394 2395

 out:
2396
	cfg80211_unlock_rdev(rdev);
2397
	dev_put(dev);
J
Johannes Berg 已提交
2398 2399 2400
 out_rtnl:
	rtnl_unlock();

2401 2402 2403
	return err;
}

2404 2405
static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
{
2406
	struct cfg80211_registered_device *rdev;
2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425
	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]);
2426 2427 2428 2429 2430 2431
	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]);
	}
2432

J
Johannes Berg 已提交
2433 2434
	rtnl_lock();

2435
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2436
	if (err)
J
Johannes Berg 已提交
2437
		goto out_rtnl;
2438

2439
	if (!rdev->ops->change_bss) {
2440 2441 2442 2443
		err = -EOPNOTSUPP;
		goto out;
	}

2444 2445 2446 2447 2448
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
		err = -EOPNOTSUPP;
		goto out;
	}

2449
	err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2450 2451

 out:
2452
	cfg80211_unlock_rdev(rdev);
2453
	dev_put(dev);
J
Johannes Berg 已提交
2454 2455 2456
 out_rtnl:
	rtnl_unlock();

2457 2458 2459
	return err;
}

2460 2461 2462 2463 2464 2465 2466 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 2507 2508 2509 2510
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;

2511 2512 2513 2514 2515 2516 2517 2518
	/*
	 * 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)) {
2519 2520
		mutex_unlock(&cfg80211_mutex);
		return -EINPROGRESS;
2521
	}
2522
	mutex_unlock(&cfg80211_mutex);
2523

2524 2525
	if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
		return -EINVAL;
2526 2527 2528 2529 2530

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

#ifdef CONFIG_WIRELESS_OLD_REGULATORY
	/* We ignore world regdom requests with the old regdom setup */
2531 2532
	if (is_world_regdom(data))
		return -EINVAL;
2533
#endif
2534 2535 2536

	r = regulatory_hint_user(data);

2537 2538 2539
	return r;
}

2540 2541 2542
static int nl80211_get_mesh_params(struct sk_buff *skb,
	struct genl_info *info)
{
2543
	struct cfg80211_registered_device *rdev;
2544 2545 2546 2547 2548 2549 2550
	struct mesh_config cur_params;
	int err;
	struct net_device *dev;
	void *hdr;
	struct nlattr *pinfoattr;
	struct sk_buff *msg;

J
Johannes Berg 已提交
2551 2552
	rtnl_lock();

2553
	/* Look up our device */
2554
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2555
	if (err)
J
Johannes Berg 已提交
2556
		goto out_rtnl;
2557

2558
	if (!rdev->ops->get_mesh_params) {
2559 2560 2561 2562
		err = -EOPNOTSUPP;
		goto out;
	}

2563
	/* Get the mesh params */
2564
	err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2565 2566 2567 2568
	if (err)
		goto out;

	/* Draw up a netlink message to send back */
2569
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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
	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);
J
Johannes Berg 已提交
2610
	err = genlmsg_reply(msg, info);
2611 2612
	goto out;

J
Johannes Berg 已提交
2613
 nla_put_failure:
2614 2615
	genlmsg_cancel(msg, hdr);
	err = -EMSGSIZE;
J
Johannes Berg 已提交
2616
 out:
2617
	/* Cleanup */
2618
	cfg80211_unlock_rdev(rdev);
2619
	dev_put(dev);
J
Johannes Berg 已提交
2620 2621 2622
 out_rtnl:
	rtnl_unlock();

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 2649 2650 2651 2652 2653 2654 2655
	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;
2656
	struct cfg80211_registered_device *rdev;
2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668
	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;

J
Johannes Berg 已提交
2669 2670
	rtnl_lock();

2671
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2672
	if (err)
J
Johannes Berg 已提交
2673
		goto out_rtnl;
2674

2675
	if (!rdev->ops->set_mesh_params) {
2676 2677 2678 2679
		err = -EOPNOTSUPP;
		goto out;
	}

2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719
	/* 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 */
2720
	err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2721

2722
 out:
2723
	/* cleanup */
2724
	cfg80211_unlock_rdev(rdev);
2725
	dev_put(dev);
J
Johannes Berg 已提交
2726 2727 2728
 out_rtnl:
	rtnl_unlock();

2729 2730 2731 2732 2733
	return err;
}

#undef FILL_IN_MESH_PARAM_IF_SET

2734 2735 2736 2737 2738 2739 2740 2741
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;

2742
	mutex_lock(&cfg80211_mutex);
2743 2744 2745 2746

	if (!cfg80211_regdomain)
		goto out;

2747
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2748 2749 2750 2751 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 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797
	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);
J
Johannes Berg 已提交
2798
	err = genlmsg_reply(msg, info);
2799 2800 2801 2802 2803 2804
	goto out;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
	err = -EMSGSIZE;
out:
2805
	mutex_unlock(&cfg80211_mutex);
2806 2807 2808
	return err;
}

2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829
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)
2830
			return -EINVAL;
2831 2832
	}

2833 2834
	mutex_lock(&cfg80211_mutex);

2835 2836 2837 2838
	if (!reg_is_valid_request(alpha2)) {
		r = -EINVAL;
		goto bad_reg;
	}
2839 2840 2841 2842 2843

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

	rd = kzalloc(size_of_regd, GFP_KERNEL);
2844 2845 2846 2847
	if (!rd) {
		r = -ENOMEM;
		goto bad_reg;
	}
2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863

	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++;

2864 2865
		if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
			r = -EINVAL;
2866
			goto bad_reg;
2867
		}
2868 2869 2870 2871 2872
	}

	BUG_ON(rule_idx != num_rules);

	r = set_regdom(rd);
2873

2874
	mutex_unlock(&cfg80211_mutex);
2875

2876 2877
	return r;

2878
 bad_reg:
2879
	mutex_unlock(&cfg80211_mutex);
2880
	kfree(rd);
2881
	return r;
2882 2883
}

2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908
static int validate_scan_freqs(struct nlattr *freqs)
{
	struct nlattr *attr1, *attr2;
	int n_channels = 0, tmp1, tmp2;

	nla_for_each_nested(attr1, freqs, tmp1) {
		n_channels++;
		/*
		 * Some hardware has a limited channel list for
		 * scanning, and it is pretty much nonsensical
		 * to scan for a channel twice, so disallow that
		 * and don't require drivers to check that the
		 * channel list they get isn't longer than what
		 * they can scan, as long as they can scan all
		 * the channels they registered at once.
		 */
		nla_for_each_nested(attr2, freqs, tmp2)
			if (attr1 != attr2 &&
			    nla_get_u32(attr1) == nla_get_u32(attr2))
				return 0;
	}

	return n_channels;
}

2909 2910
static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
{
2911
	struct cfg80211_registered_device *rdev;
2912 2913 2914 2915 2916 2917
	struct net_device *dev;
	struct cfg80211_scan_request *request;
	struct cfg80211_ssid *ssid;
	struct ieee80211_channel *channel;
	struct nlattr *attr;
	struct wiphy *wiphy;
2918
	int err, tmp, n_ssids = 0, n_channels, i;
2919
	enum ieee80211_band band;
2920
	size_t ie_len;
2921

2922 2923 2924
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

J
Johannes Berg 已提交
2925 2926
	rtnl_lock();

2927
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2928
	if (err)
J
Johannes Berg 已提交
2929
		goto out_rtnl;
2930

2931
	wiphy = &rdev->wiphy;
2932

2933
	if (!rdev->ops->scan) {
2934 2935 2936 2937
		err = -EOPNOTSUPP;
		goto out;
	}

2938 2939 2940 2941 2942
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

2943
	if (rdev->scan_req) {
2944
		err = -EBUSY;
J
Johannes Berg 已提交
2945
		goto out;
2946 2947 2948
	}

	if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2949 2950
		n_channels = validate_scan_freqs(
				info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2951 2952
		if (!n_channels) {
			err = -EINVAL;
J
Johannes Berg 已提交
2953
			goto out;
2954 2955
		}
	} else {
2956 2957
		n_channels = 0;

2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968
		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;
J
Johannes Berg 已提交
2969
		goto out;
2970 2971
	}

2972 2973 2974 2975 2976
	if (info->attrs[NL80211_ATTR_IE])
		ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
	else
		ie_len = 0;

2977 2978 2979 2980 2981
	if (ie_len > wiphy->max_scan_ie_len) {
		err = -EINVAL;
		goto out;
	}

2982 2983
	request = kzalloc(sizeof(*request)
			+ sizeof(*ssid) * n_ssids
2984 2985
			+ sizeof(channel) * n_channels
			+ ie_len, GFP_KERNEL);
2986 2987
	if (!request) {
		err = -ENOMEM;
J
Johannes Berg 已提交
2988
		goto out;
2989 2990 2991 2992
	}

	request->n_channels = n_channels;
	if (n_ssids)
2993
		request->ssids = (void *)&request->channels[n_channels];
2994
	request->n_ssids = n_ssids;
2995 2996 2997 2998 2999 3000
	if (ie_len) {
		if (request->ssids)
			request->ie = (void *)(request->ssids + n_ssids);
		else
			request->ie = (void *)(request->channels + n_channels);
	}
3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040

	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++;
		}
	}

3041 3042
	if (info->attrs[NL80211_ATTR_IE]) {
		request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3043 3044
		memcpy((void *)request->ie,
		       nla_data(info->attrs[NL80211_ATTR_IE]),
3045 3046 3047
		       request->ie_len);
	}

3048
	request->dev = dev;
3049
	request->wiphy = &rdev->wiphy;
3050

3051 3052
	rdev->scan_req = request;
	err = rdev->ops->scan(&rdev->wiphy, dev, request);
3053

3054
	if (!err) {
3055
		nl80211_send_scan_start(rdev, dev);
3056 3057
		dev_hold(dev);
	}
3058

3059 3060
 out_free:
	if (err) {
3061
		rdev->scan_req = NULL;
3062 3063 3064
		kfree(request);
	}
 out:
3065
	cfg80211_unlock_rdev(rdev);
3066
	dev_put(dev);
J
Johannes Berg 已提交
3067 3068 3069
 out_rtnl:
	rtnl_unlock();

3070 3071 3072 3073 3074
	return err;
}

static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			    struct cfg80211_registered_device *rdev,
J
Johannes Berg 已提交
3075 3076
			    struct wireless_dev *wdev,
			    struct cfg80211_internal_bss *intbss)
3077
{
J
Johannes Berg 已提交
3078
	struct cfg80211_bss *res = &intbss->pub;
3079 3080
	void *hdr;
	struct nlattr *bss;
J
Johannes Berg 已提交
3081 3082 3083
	int i;

	ASSERT_WDEV_LOCK(wdev);
3084 3085 3086 3087 3088 3089

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

3090
	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
J
Johannes Berg 已提交
3091
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108

	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);

J
Johannes Berg 已提交
3109
	switch (rdev->wiphy.signal_type) {
3110 3111 3112 3113 3114 3115 3116 3117 3118 3119
	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;
	}

J
Johannes Berg 已提交
3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141
	switch (wdev->iftype) {
	case NL80211_IFTYPE_STATION:
		if (intbss == wdev->current_bss)
			NLA_PUT_U32(msg, NL80211_BSS_STATUS,
				    NL80211_BSS_STATUS_ASSOCIATED);
		else for (i = 0; i < MAX_AUTH_BSSES; i++) {
			if (intbss != wdev->auth_bsses[i])
				continue;
			NLA_PUT_U32(msg, NL80211_BSS_STATUS,
				    NL80211_BSS_STATUS_AUTHENTICATED);
			break;
		}
		break;
	case NL80211_IFTYPE_ADHOC:
		if (intbss == wdev->current_bss)
			NLA_PUT_U32(msg, NL80211_BSS_STATUS,
				    NL80211_BSS_STATUS_IBSS_JOINED);
		break;
	default:
		break;
	}

3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153
	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)
{
J
Johannes Berg 已提交
3154 3155
	struct cfg80211_registered_device *rdev;
	struct net_device *dev;
3156
	struct cfg80211_internal_bss *scan;
J
Johannes Berg 已提交
3157
	struct wireless_dev *wdev;
3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177
	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;
	}

3178
	dev = dev_get_by_index(sock_net(skb->sk), ifidx);
J
Johannes Berg 已提交
3179
	if (!dev)
3180 3181
		return -ENODEV;

3182
	rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
J
Johannes Berg 已提交
3183 3184
	if (IS_ERR(rdev)) {
		err = PTR_ERR(rdev);
3185 3186 3187
		goto out_put_netdev;
	}

J
Johannes Berg 已提交
3188
	wdev = dev->ieee80211_ptr;
3189

J
Johannes Berg 已提交
3190 3191 3192 3193 3194
	wdev_lock(wdev);
	spin_lock_bh(&rdev->bss_lock);
	cfg80211_bss_expire(rdev);

	list_for_each_entry(scan, &rdev->bss_list, list) {
3195 3196 3197 3198 3199
		if (++idx <= start)
			continue;
		if (nl80211_send_bss(skb,
				NETLINK_CB(cb->skb).pid,
				cb->nlh->nlmsg_seq, NLM_F_MULTI,
J
Johannes Berg 已提交
3200
				rdev, wdev, scan) < 0) {
3201 3202 3203 3204 3205 3206
			idx--;
			goto out;
		}
	}

 out:
J
Johannes Berg 已提交
3207 3208
	spin_unlock_bh(&rdev->bss_lock);
	wdev_unlock(wdev);
3209 3210 3211

	cb->args[1] = idx;
	err = skb->len;
J
Johannes Berg 已提交
3212
	cfg80211_unlock_rdev(rdev);
3213
 out_put_netdev:
J
Johannes Berg 已提交
3214
	dev_put(dev);
3215 3216 3217 3218

	return err;
}

3219 3220
static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
{
S
Samuel Ortiz 已提交
3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242
	return auth_type <= NL80211_AUTHTYPE_MAX;
}

static bool nl80211_valid_wpa_versions(u32 wpa_versions)
{
	return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
				  NL80211_WPA_VERSION_2));
}

static bool nl80211_valid_akm_suite(u32 akm)
{
	return akm == WLAN_AKM_SUITE_8021X ||
		akm == WLAN_AKM_SUITE_PSK;
}

static bool nl80211_valid_cipher_suite(u32 cipher)
{
	return cipher == WLAN_CIPHER_SUITE_WEP40 ||
		cipher == WLAN_CIPHER_SUITE_WEP104 ||
		cipher == WLAN_CIPHER_SUITE_TKIP ||
		cipher == WLAN_CIPHER_SUITE_CCMP ||
		cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3243 3244
}

S
Samuel Ortiz 已提交
3245

3246 3247
static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
{
3248
	struct cfg80211_registered_device *rdev;
3249
	struct net_device *dev;
J
Johannes Berg 已提交
3250 3251 3252 3253
	struct ieee80211_channel *chan;
	const u8 *bssid, *ssid, *ie = NULL;
	int err, ssid_len, ie_len = 0;
	enum nl80211_auth_type auth_type;
J
Johannes Berg 已提交
3254
	struct key_parse key;
3255

3256 3257 3258 3259 3260 3261
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

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

3262 3263 3264
	if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
		return -EINVAL;

J
Johannes Berg 已提交
3265 3266 3267 3268 3269 3270
	if (!info->attrs[NL80211_ATTR_SSID])
		return -EINVAL;

	if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
		return -EINVAL;

J
Johannes Berg 已提交
3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289
	err = nl80211_parse_key(info, &key);
	if (err)
		return err;

	if (key.idx >= 0) {
		if (!key.p.key || !key.p.key_len)
			return -EINVAL;
		if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
		     key.p.key_len != WLAN_KEY_LEN_WEP40) &&
		    (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
		     key.p.key_len != WLAN_KEY_LEN_WEP104))
			return -EINVAL;
		if (key.idx > 4)
			return -EINVAL;
	} else {
		key.p.key_len = 0;
		key.p.key = NULL;
	}

3290 3291
	rtnl_lock();

3292
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3293 3294 3295
	if (err)
		goto unlock_rtnl;

3296
	if (!rdev->ops->auth) {
3297 3298 3299 3300
		err = -EOPNOTSUPP;
		goto out;
	}

3301 3302 3303 3304 3305
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

3306 3307 3308 3309 3310
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

J
Johannes Berg 已提交
3311
	bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3312
	chan = ieee80211_get_channel(&rdev->wiphy,
J
Johannes Berg 已提交
3313 3314 3315 3316
		nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
	if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
		err = -EINVAL;
		goto out;
3317 3318
	}

J
Johannes Berg 已提交
3319 3320
	ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
	ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3321 3322

	if (info->attrs[NL80211_ATTR_IE]) {
J
Johannes Berg 已提交
3323 3324
		ie = nla_data(info->attrs[NL80211_ATTR_IE]);
		ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3325 3326
	}

J
Johannes Berg 已提交
3327 3328
	auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
	if (!nl80211_valid_auth_type(auth_type)) {
3329 3330
		err = -EINVAL;
		goto out;
3331 3332
	}

3333
	err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
J
Johannes Berg 已提交
3334 3335
				 ssid, ssid_len, ie, ie_len,
				 key.p.key, key.p.key_len, key.idx);
3336 3337

out:
3338
	cfg80211_unlock_rdev(rdev);
3339 3340 3341 3342 3343 3344
	dev_put(dev);
unlock_rtnl:
	rtnl_unlock();
	return err;
}

S
Samuel Ortiz 已提交
3345
static int nl80211_crypto_settings(struct genl_info *info,
3346 3347
				   struct cfg80211_crypto_settings *settings,
				   int cipher_limit)
S
Samuel Ortiz 已提交
3348
{
3349 3350
	memset(settings, 0, sizeof(*settings));

S
Samuel Ortiz 已提交
3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363
	settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];

	if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
		void *data;
		int len, i;

		data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
		len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
		settings->n_ciphers_pairwise = len / sizeof(u32);

		if (len % sizeof(u32))
			return -EINVAL;

3364
		if (settings->n_ciphers_pairwise > cipher_limit)
S
Samuel Ortiz 已提交
3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409
			return -EINVAL;

		memcpy(settings->ciphers_pairwise, data, len);

		for (i = 0; i < settings->n_ciphers_pairwise; i++)
			if (!nl80211_valid_cipher_suite(
					settings->ciphers_pairwise[i]))
				return -EINVAL;
	}

	if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
		settings->cipher_group =
			nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
		if (!nl80211_valid_cipher_suite(settings->cipher_group))
			return -EINVAL;
	}

	if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
		settings->wpa_versions =
			nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
		if (!nl80211_valid_wpa_versions(settings->wpa_versions))
			return -EINVAL;
	}

	if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
		void *data;
		int len, i;

		data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
		len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
		settings->n_akm_suites = len / sizeof(u32);

		if (len % sizeof(u32))
			return -EINVAL;

		memcpy(settings->akm_suites, data, len);

		for (i = 0; i < settings->n_ciphers_pairwise; i++)
			if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
				return -EINVAL;
	}

	return 0;
}

3410 3411
static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
{
J
Johannes Berg 已提交
3412
	struct cfg80211_registered_device *rdev;
3413
	struct net_device *dev;
J
Johannes Berg 已提交
3414
	struct cfg80211_crypto_settings crypto;
3415
	struct ieee80211_channel *chan, *fixedchan;
3416
	const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
J
Johannes Berg 已提交
3417 3418
	int err, ssid_len, ie_len = 0;
	bool use_mfp = false;
3419

3420 3421 3422 3423
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

	if (!info->attrs[NL80211_ATTR_MAC] ||
J
Johannes Berg 已提交
3424 3425
	    !info->attrs[NL80211_ATTR_SSID] ||
	    !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3426 3427
		return -EINVAL;

3428 3429
	rtnl_lock();

3430
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3431 3432 3433
	if (err)
		goto unlock_rtnl;

J
Johannes Berg 已提交
3434
	if (!rdev->ops->assoc) {
3435 3436 3437 3438
		err = -EOPNOTSUPP;
		goto out;
	}

3439 3440 3441 3442 3443
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

3444 3445 3446 3447 3448
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

J
Johannes Berg 已提交
3449
	bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3450

J
Johannes Berg 已提交
3451 3452 3453 3454 3455
	chan = ieee80211_get_channel(&rdev->wiphy,
		nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
	if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
		err = -EINVAL;
		goto out;
3456 3457
	}

3458 3459 3460 3461 3462 3463 3464 3465 3466
	mutex_lock(&rdev->devlist_mtx);
	fixedchan = rdev_fixed_channel(rdev, NULL);
	if (fixedchan && chan != fixedchan) {
		err = -EBUSY;
		mutex_unlock(&rdev->devlist_mtx);
		goto out;
	}
	mutex_unlock(&rdev->devlist_mtx);

J
Johannes Berg 已提交
3467 3468
	ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
	ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3469 3470

	if (info->attrs[NL80211_ATTR_IE]) {
J
Johannes Berg 已提交
3471 3472
		ie = nla_data(info->attrs[NL80211_ATTR_IE]);
		ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3473 3474
	}

3475
	if (info->attrs[NL80211_ATTR_USE_MFP]) {
3476
		enum nl80211_mfp mfp =
3477
			nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3478
		if (mfp == NL80211_MFP_REQUIRED)
J
Johannes Berg 已提交
3479
			use_mfp = true;
3480
		else if (mfp != NL80211_MFP_NO) {
3481 3482 3483 3484 3485
			err = -EINVAL;
			goto out;
		}
	}

3486 3487 3488
	if (info->attrs[NL80211_ATTR_PREV_BSSID])
		prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);

3489
	err = nl80211_crypto_settings(info, &crypto, 1);
S
Samuel Ortiz 已提交
3490
	if (!err)
3491 3492
		err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
					  ssid, ssid_len, ie, ie_len, use_mfp,
J
Johannes Berg 已提交
3493
					  &crypto);
3494 3495

out:
3496
	cfg80211_unlock_rdev(rdev);
3497 3498 3499 3500 3501 3502 3503 3504
	dev_put(dev);
unlock_rtnl:
	rtnl_unlock();
	return err;
}

static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
{
3505
	struct cfg80211_registered_device *rdev;
3506
	struct net_device *dev;
J
Johannes Berg 已提交
3507 3508 3509
	const u8 *ie = NULL, *bssid;
	int err, ie_len = 0;
	u16 reason_code;
3510

3511 3512 3513 3514 3515 3516 3517 3518 3519
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

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

	if (!info->attrs[NL80211_ATTR_REASON_CODE])
		return -EINVAL;

3520 3521
	rtnl_lock();

3522
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3523 3524 3525
	if (err)
		goto unlock_rtnl;

3526
	if (!rdev->ops->deauth) {
3527 3528 3529 3530
		err = -EOPNOTSUPP;
		goto out;
	}

3531 3532 3533 3534 3535
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

3536 3537 3538 3539 3540
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

J
Johannes Berg 已提交
3541
	bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3542

J
Johannes Berg 已提交
3543 3544
	reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
	if (reason_code == 0) {
3545 3546 3547
		/* Reason Code 0 is reserved */
		err = -EINVAL;
		goto out;
3548
	}
3549 3550

	if (info->attrs[NL80211_ATTR_IE]) {
J
Johannes Berg 已提交
3551 3552
		ie = nla_data(info->attrs[NL80211_ATTR_IE]);
		ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3553 3554
	}

3555
	err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code);
3556 3557

out:
3558
	cfg80211_unlock_rdev(rdev);
3559 3560 3561 3562 3563 3564 3565 3566
	dev_put(dev);
unlock_rtnl:
	rtnl_unlock();
	return err;
}

static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
{
3567
	struct cfg80211_registered_device *rdev;
3568
	struct net_device *dev;
J
Johannes Berg 已提交
3569 3570 3571
	const u8 *ie = NULL, *bssid;
	int err, ie_len = 0;
	u16 reason_code;
3572

3573 3574 3575 3576 3577 3578 3579 3580 3581
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

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

	if (!info->attrs[NL80211_ATTR_REASON_CODE])
		return -EINVAL;

3582 3583
	rtnl_lock();

3584
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3585 3586 3587
	if (err)
		goto unlock_rtnl;

3588
	if (!rdev->ops->disassoc) {
3589 3590 3591 3592
		err = -EOPNOTSUPP;
		goto out;
	}

3593 3594 3595 3596 3597
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

3598 3599 3600 3601 3602
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

J
Johannes Berg 已提交
3603
	bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3604

J
Johannes Berg 已提交
3605 3606
	reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
	if (reason_code == 0) {
3607 3608 3609
		/* Reason Code 0 is reserved */
		err = -EINVAL;
		goto out;
3610
	}
3611 3612

	if (info->attrs[NL80211_ATTR_IE]) {
J
Johannes Berg 已提交
3613 3614
		ie = nla_data(info->attrs[NL80211_ATTR_IE]);
		ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3615 3616
	}

3617
	err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code);
3618 3619

out:
3620
	cfg80211_unlock_rdev(rdev);
3621 3622 3623 3624 3625 3626
	dev_put(dev);
unlock_rtnl:
	rtnl_unlock();
	return err;
}

J
Johannes Berg 已提交
3627 3628
static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
{
3629
	struct cfg80211_registered_device *rdev;
J
Johannes Berg 已提交
3630 3631 3632
	struct net_device *dev;
	struct cfg80211_ibss_params ibss;
	struct wiphy *wiphy;
J
Johannes Berg 已提交
3633
	struct cfg80211_cached_keys *connkeys = NULL;
J
Johannes Berg 已提交
3634 3635
	int err;

3636 3637
	memset(&ibss, 0, sizeof(ibss));

J
Johannes Berg 已提交
3638 3639 3640 3641 3642 3643 3644 3645
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

	if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
	    !info->attrs[NL80211_ATTR_SSID] ||
	    !nla_len(info->attrs[NL80211_ATTR_SSID]))
		return -EINVAL;

3646 3647 3648 3649 3650 3651 3652 3653 3654
	ibss.beacon_interval = 100;

	if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
		ibss.beacon_interval =
			nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
		if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
			return -EINVAL;
	}

J
Johannes Berg 已提交
3655 3656
	rtnl_lock();

3657
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
J
Johannes Berg 已提交
3658 3659 3660
	if (err)
		goto unlock_rtnl;

3661
	if (!rdev->ops->join_ibss) {
J
Johannes Berg 已提交
3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675
		err = -EOPNOTSUPP;
		goto out;
	}

	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
		err = -EOPNOTSUPP;
		goto out;
	}

	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

3676
	wiphy = &rdev->wiphy;
J
Johannes Berg 已提交
3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697

	if (info->attrs[NL80211_ATTR_MAC])
		ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
	ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
	ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);

	if (info->attrs[NL80211_ATTR_IE]) {
		ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
		ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
	}

	ibss.channel = ieee80211_get_channel(wiphy,
		nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
	if (!ibss.channel ||
	    ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
	    ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
		err = -EINVAL;
		goto out;
	}

	ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
J
Johannes Berg 已提交
3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708
	ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];

	if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
		connkeys = nl80211_parse_connkeys(rdev,
					info->attrs[NL80211_ATTR_KEYS]);
		if (IS_ERR(connkeys)) {
			err = PTR_ERR(connkeys);
			connkeys = NULL;
			goto out;
		}
	}
J
Johannes Berg 已提交
3709

J
Johannes Berg 已提交
3710
	err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
J
Johannes Berg 已提交
3711 3712

out:
3713
	cfg80211_unlock_rdev(rdev);
J
Johannes Berg 已提交
3714 3715
	dev_put(dev);
unlock_rtnl:
J
Johannes Berg 已提交
3716 3717
	if (err)
		kfree(connkeys);
J
Johannes Berg 已提交
3718 3719 3720 3721 3722 3723
	rtnl_unlock();
	return err;
}

static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
{
3724
	struct cfg80211_registered_device *rdev;
J
Johannes Berg 已提交
3725 3726 3727 3728 3729
	struct net_device *dev;
	int err;

	rtnl_lock();

3730
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
J
Johannes Berg 已提交
3731 3732 3733
	if (err)
		goto unlock_rtnl;

3734
	if (!rdev->ops->leave_ibss) {
J
Johannes Berg 已提交
3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748
		err = -EOPNOTSUPP;
		goto out;
	}

	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
		err = -EOPNOTSUPP;
		goto out;
	}

	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

3749
	err = cfg80211_leave_ibss(rdev, dev, false);
J
Johannes Berg 已提交
3750 3751

out:
3752
	cfg80211_unlock_rdev(rdev);
J
Johannes Berg 已提交
3753 3754 3755 3756 3757 3758
	dev_put(dev);
unlock_rtnl:
	rtnl_unlock();
	return err;
}

3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788
#ifdef CONFIG_NL80211_TESTMODE
static struct genl_multicast_group nl80211_testmode_mcgrp = {
	.name = "testmode",
};

static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
	int err;

	if (!info->attrs[NL80211_ATTR_TESTDATA])
		return -EINVAL;

	rtnl_lock();

	rdev = cfg80211_get_dev_from_info(info);
	if (IS_ERR(rdev)) {
		err = PTR_ERR(rdev);
		goto unlock_rtnl;
	}

	err = -EOPNOTSUPP;
	if (rdev->ops->testmode_cmd) {
		rdev->testmode_info = info;
		err = rdev->ops->testmode_cmd(&rdev->wiphy,
				nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
				nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
		rdev->testmode_info = NULL;
	}

3789
	cfg80211_unlock_rdev(rdev);
3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880

 unlock_rtnl:
	rtnl_unlock();
	return err;
}

static struct sk_buff *
__cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
			      int approxlen, u32 pid, u32 seq, gfp_t gfp)
{
	struct sk_buff *skb;
	void *hdr;
	struct nlattr *data;

	skb = nlmsg_new(approxlen + 100, gfp);
	if (!skb)
		return NULL;

	hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
	if (!hdr) {
		kfree_skb(skb);
		return NULL;
	}

	NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);

	((void **)skb->cb)[0] = rdev;
	((void **)skb->cb)[1] = hdr;
	((void **)skb->cb)[2] = data;

	return skb;

 nla_put_failure:
	kfree_skb(skb);
	return NULL;
}

struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
						  int approxlen)
{
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);

	if (WARN_ON(!rdev->testmode_info))
		return NULL;

	return __cfg80211_testmode_alloc_skb(rdev, approxlen,
				rdev->testmode_info->snd_pid,
				rdev->testmode_info->snd_seq,
				GFP_KERNEL);
}
EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);

int cfg80211_testmode_reply(struct sk_buff *skb)
{
	struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
	void *hdr = ((void **)skb->cb)[1];
	struct nlattr *data = ((void **)skb->cb)[2];

	if (WARN_ON(!rdev->testmode_info)) {
		kfree_skb(skb);
		return -EINVAL;
	}

	nla_nest_end(skb, data);
	genlmsg_end(skb, hdr);
	return genlmsg_reply(skb, rdev->testmode_info);
}
EXPORT_SYMBOL(cfg80211_testmode_reply);

struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
						  int approxlen, gfp_t gfp)
{
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);

	return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
}
EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);

void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
{
	void *hdr = ((void **)skb->cb)[1];
	struct nlattr *data = ((void **)skb->cb)[2];

	nla_nest_end(skb, data);
	genlmsg_end(skb, hdr);
	genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
}
EXPORT_SYMBOL(cfg80211_testmode_event);
#endif

S
Samuel Ortiz 已提交
3881 3882
static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
{
3883
	struct cfg80211_registered_device *rdev;
S
Samuel Ortiz 已提交
3884 3885 3886
	struct net_device *dev;
	struct cfg80211_connect_params connect;
	struct wiphy *wiphy;
J
Johannes Berg 已提交
3887
	struct cfg80211_cached_keys *connkeys = NULL;
S
Samuel Ortiz 已提交
3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908
	int err;

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

	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

	if (!info->attrs[NL80211_ATTR_SSID] ||
	    !nla_len(info->attrs[NL80211_ATTR_SSID]))
		return -EINVAL;

	if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
		connect.auth_type =
			nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
		if (!nl80211_valid_auth_type(connect.auth_type))
			return -EINVAL;
	} else
		connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;

	connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];

3909 3910
	err = nl80211_crypto_settings(info, &connect.crypto,
				      NL80211_MAX_NR_CIPHER_SUITES);
S
Samuel Ortiz 已提交
3911 3912 3913 3914
	if (err)
		return err;
	rtnl_lock();

3915
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
S
Samuel Ortiz 已提交
3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928
	if (err)
		goto unlock_rtnl;

	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

3929
	wiphy = &rdev->wiphy;
S
Samuel Ortiz 已提交
3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951

	if (info->attrs[NL80211_ATTR_MAC])
		connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
	connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
	connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);

	if (info->attrs[NL80211_ATTR_IE]) {
		connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
		connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
	}

	if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
		connect.channel =
			ieee80211_get_channel(wiphy,
			    nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
		if (!connect.channel ||
		    connect.channel->flags & IEEE80211_CHAN_DISABLED) {
			err = -EINVAL;
			goto out;
		}
	}

J
Johannes Berg 已提交
3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962
	if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
		connkeys = nl80211_parse_connkeys(rdev,
					info->attrs[NL80211_ATTR_KEYS]);
		if (IS_ERR(connkeys)) {
			err = PTR_ERR(connkeys);
			connkeys = NULL;
			goto out;
		}
	}

	err = cfg80211_connect(rdev, dev, &connect, connkeys);
S
Samuel Ortiz 已提交
3963 3964

out:
3965
	cfg80211_unlock_rdev(rdev);
S
Samuel Ortiz 已提交
3966 3967
	dev_put(dev);
unlock_rtnl:
J
Johannes Berg 已提交
3968 3969
	if (err)
		kfree(connkeys);
S
Samuel Ortiz 已提交
3970 3971 3972 3973 3974 3975
	rtnl_unlock();
	return err;
}

static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
{
3976
	struct cfg80211_registered_device *rdev;
S
Samuel Ortiz 已提交
3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990
	struct net_device *dev;
	int err;
	u16 reason;

	if (!info->attrs[NL80211_ATTR_REASON_CODE])
		reason = WLAN_REASON_DEAUTH_LEAVING;
	else
		reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);

	if (reason == 0)
		return -EINVAL;

	rtnl_lock();

3991
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
S
Samuel Ortiz 已提交
3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004
	if (err)
		goto unlock_rtnl;

	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

4005
	err = cfg80211_disconnect(rdev, dev, reason, true);
S
Samuel Ortiz 已提交
4006 4007

out:
4008
	cfg80211_unlock_rdev(rdev);
S
Samuel Ortiz 已提交
4009 4010 4011 4012 4013 4014
	dev_put(dev);
unlock_rtnl:
	rtnl_unlock();
	return err;
}

4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055
static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
	struct net *net;
	int err;
	u32 pid;

	if (!info->attrs[NL80211_ATTR_PID])
		return -EINVAL;

	pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);

	rtnl_lock();

	rdev = cfg80211_get_dev_from_info(info);
	if (IS_ERR(rdev)) {
		err = PTR_ERR(rdev);
		goto out;
	}

	net = get_net_ns_by_pid(pid);
	if (IS_ERR(net)) {
		err = PTR_ERR(net);
		goto out;
	}

	err = 0;

	/* check if anything to do */
	if (net_eq(wiphy_net(&rdev->wiphy), net))
		goto out_put_net;

	err = cfg80211_switch_netns(rdev, net);
 out_put_net:
	put_net(net);
 out:
	cfg80211_unlock_rdev(rdev);
	rtnl_unlock();
	return err;
}

4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092
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,
4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116
		.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,
4117 4118
		.flags = GENL_ADMIN_PERM,
	},
4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136
	{
		.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,
	},
4137 4138 4139
	{
		.cmd = NL80211_CMD_GET_STATION,
		.doit = nl80211_get_station,
4140
		.dumpit = nl80211_dump_station,
4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158
		.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,
4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183
		.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,
4184 4185 4186 4187 4188 4189
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_SET_BSS,
		.doit = nl80211_set_bss,
		.policy = nl80211_policy,
4190 4191
		.flags = GENL_ADMIN_PERM,
	},
4192 4193 4194 4195 4196 4197
	{
		.cmd = NL80211_CMD_GET_REG,
		.doit = nl80211_get_reg,
		.policy = nl80211_policy,
		/* can be retrieved by unprivileged users */
	},
4198 4199 4200 4201 4202 4203 4204 4205 4206 4207
	{
		.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,
4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219
		.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,
4220 4221
		.flags = GENL_ADMIN_PERM,
	},
4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232
	{
		.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,
	},
4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256
	{
		.cmd = NL80211_CMD_AUTHENTICATE,
		.doit = nl80211_authenticate,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_ASSOCIATE,
		.doit = nl80211_associate,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_DEAUTHENTICATE,
		.doit = nl80211_deauthenticate,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_DISASSOCIATE,
		.doit = nl80211_disassociate,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
J
Johannes Berg 已提交
4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268
	{
		.cmd = NL80211_CMD_JOIN_IBSS,
		.doit = nl80211_join_ibss,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_LEAVE_IBSS,
		.doit = nl80211_leave_ibss,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
4269 4270 4271 4272 4273 4274 4275 4276
#ifdef CONFIG_NL80211_TESTMODE
	{
		.cmd = NL80211_CMD_TESTMODE,
		.doit = nl80211_testmode_do,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
#endif
S
Samuel Ortiz 已提交
4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288
	{
		.cmd = NL80211_CMD_CONNECT,
		.doit = nl80211_connect,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_DISCONNECT,
		.doit = nl80211_disconnect,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
4289 4290 4291 4292 4293 4294
	{
		.cmd = NL80211_CMD_SET_WIPHY_NETNS,
		.doit = nl80211_wiphy_netns,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
4295
};
4296 4297 4298
static struct genl_multicast_group nl80211_mlme_mcgrp = {
	.name = "mlme",
};
4299 4300 4301 4302 4303

/* multicast groups */
static struct genl_multicast_group nl80211_config_mcgrp = {
	.name = "config",
};
4304 4305 4306
static struct genl_multicast_group nl80211_scan_mcgrp = {
	.name = "scan",
};
4307 4308 4309
static struct genl_multicast_group nl80211_regulatory_mcgrp = {
	.name = "regulatory",
};
4310 4311 4312 4313 4314 4315 4316

/* notification functions */

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

4317
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4318 4319 4320 4321 4322 4323 4324 4325
	if (!msg)
		return;

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

4326 4327
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_config_mcgrp.id, GFP_KERNEL);
4328 4329
}

4330 4331 4332 4333 4334 4335 4336
static int nl80211_add_scan_req(struct sk_buff *msg,
				struct cfg80211_registered_device *rdev)
{
	struct cfg80211_scan_request *req = rdev->scan_req;
	struct nlattr *nest;
	int i;

J
Johannes Berg 已提交
4337 4338
	ASSERT_RDEV_LOCK(rdev);

4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363
	if (WARN_ON(!req))
		return 0;

	nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
	if (!nest)
		goto nla_put_failure;
	for (i = 0; i < req->n_ssids; i++)
		NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
	nla_nest_end(msg, nest);

	nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
	if (!nest)
		goto nla_put_failure;
	for (i = 0; i < req->n_channels; i++)
		NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
	nla_nest_end(msg, nest);

	if (req->ie)
		NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);

	return 0;
 nla_put_failure:
	return -ENOBUFS;
}

4364 4365 4366 4367 4368
static int nl80211_send_scan_msg(struct sk_buff *msg,
				 struct cfg80211_registered_device *rdev,
				 struct net_device *netdev,
				 u32 pid, u32 seq, int flags,
				 u32 cmd)
4369 4370 4371 4372 4373 4374 4375
{
	void *hdr;

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

4376
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4377 4378
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);

4379 4380
	/* ignore errors and send incomplete event anyway */
	nl80211_add_scan_req(msg, rdev);
4381 4382 4383 4384 4385 4386 4387 4388

	return genlmsg_end(msg, hdr);

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

4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403
void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
			     struct net_device *netdev)
{
	struct sk_buff *msg;

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

	if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
				  NL80211_CMD_TRIGGER_SCAN) < 0) {
		nlmsg_free(msg);
		return;
	}

4404 4405
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_scan_mcgrp.id, GFP_KERNEL);
4406 4407
}

4408 4409 4410 4411 4412
void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
			    struct net_device *netdev)
{
	struct sk_buff *msg;

4413
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4414 4415 4416
	if (!msg)
		return;

4417 4418
	if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
				  NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
4419 4420 4421 4422
		nlmsg_free(msg);
		return;
	}

4423 4424
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_scan_mcgrp.id, GFP_KERNEL);
4425 4426 4427 4428 4429 4430 4431
}

void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
			       struct net_device *netdev)
{
	struct sk_buff *msg;

4432
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4433 4434 4435
	if (!msg)
		return;

4436 4437
	if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
				  NL80211_CMD_SCAN_ABORTED) < 0) {
4438 4439 4440 4441
		nlmsg_free(msg);
		return;
	}

4442 4443
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_scan_mcgrp.id, GFP_KERNEL);
4444 4445
}

4446 4447 4448 4449 4450 4451 4452 4453 4454
/*
 * 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;

4455
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491
	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;
	}

4492
	rcu_read_lock();
4493
	genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
4494 4495
				GFP_ATOMIC);
	rcu_read_unlock();
4496 4497 4498 4499 4500 4501 4502 4503

	return;

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

4504 4505 4506
static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
				    struct net_device *netdev,
				    const u8 *buf, size_t len,
4507
				    enum nl80211_commands cmd, gfp_t gfp)
4508 4509 4510 4511
{
	struct sk_buff *msg;
	void *hdr;

4512
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530
	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;
	}

4531 4532
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
4533 4534 4535 4536 4537 4538 4539 4540
	return;

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

void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
4541 4542
			  struct net_device *netdev, const u8 *buf,
			  size_t len, gfp_t gfp)
4543 4544
{
	nl80211_send_mlme_event(rdev, netdev, buf, len,
4545
				NL80211_CMD_AUTHENTICATE, gfp);
4546 4547 4548 4549
}

void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
			   struct net_device *netdev, const u8 *buf,
4550
			   size_t len, gfp_t gfp)
4551
{
4552 4553
	nl80211_send_mlme_event(rdev, netdev, buf, len,
				NL80211_CMD_ASSOCIATE, gfp);
4554 4555
}

4556
void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
4557 4558
			 struct net_device *netdev, const u8 *buf,
			 size_t len, gfp_t gfp)
4559 4560
{
	nl80211_send_mlme_event(rdev, netdev, buf, len,
4561
				NL80211_CMD_DEAUTHENTICATE, gfp);
4562 4563
}

4564 4565
void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
			   struct net_device *netdev, const u8 *buf,
4566
			   size_t len, gfp_t gfp)
4567 4568
{
	nl80211_send_mlme_event(rdev, netdev, buf, len,
4569
				NL80211_CMD_DISASSOCIATE, gfp);
4570 4571
}

4572 4573
static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
				      struct net_device *netdev, int cmd,
4574
				      const u8 *addr, gfp_t gfp)
4575 4576 4577 4578
{
	struct sk_buff *msg;
	void *hdr;

4579
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

4599 4600
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
4601 4602 4603 4604 4605 4606 4607 4608
	return;

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

void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
4609 4610
			       struct net_device *netdev, const u8 *addr,
			       gfp_t gfp)
4611 4612
{
	nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
4613
				  addr, gfp);
4614 4615 4616
}

void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
4617 4618
				struct net_device *netdev, const u8 *addr,
				gfp_t gfp)
4619
{
4620 4621
	nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
				  addr, gfp);
4622 4623
}

S
Samuel Ortiz 已提交
4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657
void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
				 struct net_device *netdev, const u8 *bssid,
				 const u8 *req_ie, size_t req_ie_len,
				 const u8 *resp_ie, size_t resp_ie_len,
				 u16 status, gfp_t gfp)
{
	struct sk_buff *msg;
	void *hdr;

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

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	if (bssid)
		NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
	NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
	if (req_ie)
		NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
	if (resp_ie)
		NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

4658 4659
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
S
Samuel Ortiz 已提交
4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698
	return;

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

}

void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
			 struct net_device *netdev, const u8 *bssid,
			 const u8 *req_ie, size_t req_ie_len,
			 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
{
	struct sk_buff *msg;
	void *hdr;

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

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
	if (req_ie)
		NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
	if (resp_ie)
		NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

4699 4700
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
S
Samuel Ortiz 已提交
4701 4702 4703 4704 4705 4706 4707 4708 4709 4710
	return;

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

}

void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
			       struct net_device *netdev, u16 reason,
J
Johannes Berg 已提交
4711
			       const u8 *ie, size_t ie_len, bool from_ap)
S
Samuel Ortiz 已提交
4712 4713 4714 4715
{
	struct sk_buff *msg;
	void *hdr;

J
Johannes Berg 已提交
4716
	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
S
Samuel Ortiz 已提交
4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	if (from_ap && reason)
		NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
	if (from_ap)
		NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
	if (ie)
		NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

4740 4741
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, GFP_KERNEL);
S
Samuel Ortiz 已提交
4742 4743 4744 4745 4746 4747 4748 4749
	return;

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

}

J
Johannes Berg 已提交
4750 4751 4752 4753 4754 4755 4756
void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
			     struct net_device *netdev, const u8 *bssid,
			     gfp_t gfp)
{
	struct sk_buff *msg;
	void *hdr;

4757
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
J
Johannes Berg 已提交
4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

4776 4777
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
J
Johannes Berg 已提交
4778 4779 4780 4781 4782 4783 4784
	return;

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

4785 4786 4787
void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
				 struct net_device *netdev, const u8 *addr,
				 enum nl80211_key_type key_type, int key_id,
4788
				 const u8 *tsc, gfp_t gfp)
4789 4790 4791 4792
{
	struct sk_buff *msg;
	void *hdr;

4793
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	if (addr)
		NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
	NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
	NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
	if (tsc)
		NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

4817 4818
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
4819 4820 4821 4822 4823 4824 4825
	return;

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

4826 4827 4828 4829 4830 4831 4832 4833
void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
				    struct ieee80211_channel *channel_before,
				    struct ieee80211_channel *channel_after)
{
	struct sk_buff *msg;
	void *hdr;
	struct nlattr *nl_freq;

4834
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	/*
	 * Since we are applying the beacon hint to a wiphy we know its
	 * wiphy_idx is valid
	 */
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));

	/* Before */
	nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
	if (!nl_freq)
		goto nla_put_failure;
	if (nl80211_msg_put_channel(msg, channel_before))
		goto nla_put_failure;
	nla_nest_end(msg, nl_freq);

	/* After */
	nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
	if (!nl_freq)
		goto nla_put_failure;
	if (nl80211_msg_put_channel(msg, channel_after))
		goto nla_put_failure;
	nla_nest_end(msg, nl_freq);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

4871 4872 4873 4874
	rcu_read_lock();
	genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
				GFP_ATOMIC);
	rcu_read_unlock();
4875 4876 4877 4878 4879 4880 4881 4882

	return;

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

4883 4884 4885 4886
/* initialisation/exit functions */

int nl80211_init(void)
{
4887
	int err;
4888

4889 4890
	err = genl_register_family_with_ops(&nl80211_fam,
		nl80211_ops, ARRAY_SIZE(nl80211_ops));
4891 4892 4893 4894 4895 4896 4897
	if (err)
		return err;

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

4898 4899 4900 4901
	err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
	if (err)
		goto err_out;

4902 4903 4904 4905
	err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
	if (err)
		goto err_out;

4906 4907 4908 4909
	err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
	if (err)
		goto err_out;

4910 4911 4912 4913 4914 4915
#ifdef CONFIG_NL80211_TESTMODE
	err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
	if (err)
		goto err_out;
#endif

4916 4917 4918 4919 4920 4921 4922 4923 4924 4925
	return 0;
 err_out:
	genl_unregister_family(&nl80211_fam);
	return err;
}

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