linux/net/mac80211/ibss.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * IBSS mode implementation
 * Copyright 2003-2008, Jouni Malinen <[email protected]>
 * Copyright 2004, Instant802 Networks, Inc.
 * Copyright 2005, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <[email protected]>
 * Copyright 2007, Michael Wu <[email protected]>
 * Copyright 2009, Johannes Berg <[email protected]>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 * Copyright(c) 2016 Intel Deutschland GmbH
 * Copyright(c) 2018-2024 Intel Corporation
 */

#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/if_ether.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <net/mac80211.h>

#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"

#define IEEE80211_SCAN_INTERVAL …
#define IEEE80211_IBSS_JOIN_TIMEOUT …

#define IEEE80211_IBSS_MERGE_INTERVAL …
#define IEEE80211_IBSS_INACTIVITY_LIMIT …
#define IEEE80211_IBSS_RSN_INACTIVITY_LIMIT …

#define IEEE80211_IBSS_MAX_STA_ENTRIES …

static struct beacon_data *
ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata,
			   const int beacon_int, const u32 basic_rates,
			   const u16 capability, u64 tsf,
			   struct cfg80211_chan_def *chandef,
			   bool *have_higher_than_11mbit,
			   struct cfg80211_csa_settings *csa_settings)
{ … }

static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
				      const u8 *bssid, const int beacon_int,
				      struct cfg80211_chan_def *req_chandef,
				      const u32 basic_rates,
				      const u16 capability, u64 tsf,
				      bool creator)
{ … }

static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
				    struct ieee80211_bss *bss)
{ … }

int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
			      struct cfg80211_csa_settings *csa_settings,
			      u64 *changed)
{ … }

int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed)
{ … }

void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata)
{ … }

static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta)
	__acquires(RCU)
{ … }

static struct sta_info *
ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid,
		       const u8 *addr, u32 supp_rates)
	__acquires(RCU)
{ … }

static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
{ … }

static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata)
{ … }

static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy,
					       struct wiphy_work *work)
{ … }

static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata)
{ … }

static bool
ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata,
				  struct ieee802_11_elems *elems,
				  bool beacon)
{ … }

static void
ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata,
				struct ieee80211_mgmt *mgmt, size_t len,
				struct ieee80211_rx_status *rx_status,
				struct ieee802_11_elems *elems)
{ … }

static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata,
					  struct ieee80211_mgmt *mgmt,
					  size_t len)
{ … }

static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata,
					struct ieee80211_mgmt *mgmt,
					size_t len)
{ … }

static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata,
				      struct ieee80211_mgmt *mgmt, size_t len,
				      struct ieee80211_rx_status *rx_status,
				      struct ieee802_11_elems *elems,
				      struct ieee80211_channel *channel)
{ … }

static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
				  struct ieee80211_mgmt *mgmt, size_t len,
				  struct ieee80211_rx_status *rx_status,
				  struct ieee802_11_elems *elems)
{ … }

void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
			      const u8 *bssid, const u8 *addr,
			      u32 supp_rates)
{ … }

static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata)
{ … }

/*
 * This function is called with state == IEEE80211_IBSS_MLME_JOINED
 */

static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata)
{ … }

static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
{ … }

static unsigned int ibss_setup_channels(struct wiphy *wiphy,
					struct ieee80211_channel **channels,
					unsigned int channels_max,
					u32 center_freq, u32 width)
{ … }

static unsigned int
ieee80211_ibss_setup_scan_channels(struct wiphy *wiphy,
				   const struct cfg80211_chan_def *chandef,
				   struct ieee80211_channel **channels,
				   unsigned int channels_max)
{ … }

/*
 * This function is called with state == IEEE80211_IBSS_MLME_SEARCH
 */

static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata)
{ … }

static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
					struct sk_buff *req)
{ … }

static
void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata,
				    struct ieee80211_mgmt *mgmt, size_t len,
				    struct ieee80211_rx_status *rx_status)
{ … }

void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
				   struct sk_buff *skb)
{ … }

void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata)
{ … }

static void ieee80211_ibss_timer(struct timer_list *t)
{ … }

void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata)
{ … }

/* scan finished notification */
void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local)
{ … }

int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
			struct cfg80211_ibss_params *params)
{ … }

int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
{ … }