4219 lines
119 KiB
C
4219 lines
119 KiB
C
/*
|
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* BSS client mode implementation
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* Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
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* Copyright 2004, Instant802 Networks, Inc.
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* Copyright 2005, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* TODO:
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* order BSS list by RSSI(?) ("quality of AP")
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* scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
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* SSID)
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*/
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#include <linux/delay.h>
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#include <linux/if_ether.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/wireless.h>
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#include <linux/random.h>
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#include <linux/etherdevice.h>
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#include <linux/rtnetlink.h>
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#include <net/iw_handler.h>
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#include <asm/types.h>
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#include <net/mac80211.h>
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#include "ieee80211_i.h"
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#include "ieee80211_rate.h"
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#include "ieee80211_led.h"
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#include "mesh.h"
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#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
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#define IEEE80211_AUTH_MAX_TRIES 3
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#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
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#define IEEE80211_ASSOC_MAX_TRIES 3
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#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
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#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
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#define IEEE80211_PROBE_INTERVAL (60 * HZ)
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#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
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#define IEEE80211_SCAN_INTERVAL (2 * HZ)
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#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
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#define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
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#define IEEE80211_PROBE_DELAY (HZ / 33)
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#define IEEE80211_CHANNEL_TIME (HZ / 33)
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#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
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#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
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#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
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#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
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#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
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#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
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#define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
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#define ERP_INFO_USE_PROTECTION BIT(1)
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/* mgmt header + 1 byte action code */
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#define IEEE80211_MIN_ACTION_SIZE (24 + 1)
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#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
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#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
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#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
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#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
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#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
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/* next values represent the buffer size for A-MPDU frame.
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* According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
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#define IEEE80211_MIN_AMPDU_BUF 0x8
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#define IEEE80211_MAX_AMPDU_BUF 0x40
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static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
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u8 *ssid, size_t ssid_len);
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static struct ieee80211_sta_bss *
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ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
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u8 *ssid, u8 ssid_len);
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static void ieee80211_rx_bss_put(struct net_device *dev,
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struct ieee80211_sta_bss *bss);
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static int ieee80211_sta_find_ibss(struct net_device *dev,
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struct ieee80211_if_sta *ifsta);
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static int ieee80211_sta_wep_configured(struct net_device *dev);
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static int ieee80211_sta_start_scan(struct net_device *dev,
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u8 *ssid, size_t ssid_len);
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static int ieee80211_sta_config_auth(struct net_device *dev,
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struct ieee80211_if_sta *ifsta);
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void ieee802_11_parse_elems(u8 *start, size_t len,
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struct ieee802_11_elems *elems)
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{
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size_t left = len;
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u8 *pos = start;
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memset(elems, 0, sizeof(*elems));
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while (left >= 2) {
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u8 id, elen;
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id = *pos++;
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elen = *pos++;
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left -= 2;
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if (elen > left)
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return;
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switch (id) {
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case WLAN_EID_SSID:
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elems->ssid = pos;
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elems->ssid_len = elen;
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break;
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case WLAN_EID_SUPP_RATES:
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elems->supp_rates = pos;
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elems->supp_rates_len = elen;
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break;
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case WLAN_EID_FH_PARAMS:
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elems->fh_params = pos;
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elems->fh_params_len = elen;
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break;
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case WLAN_EID_DS_PARAMS:
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elems->ds_params = pos;
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elems->ds_params_len = elen;
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break;
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case WLAN_EID_CF_PARAMS:
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elems->cf_params = pos;
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elems->cf_params_len = elen;
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break;
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case WLAN_EID_TIM:
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elems->tim = pos;
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elems->tim_len = elen;
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break;
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case WLAN_EID_IBSS_PARAMS:
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elems->ibss_params = pos;
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elems->ibss_params_len = elen;
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break;
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case WLAN_EID_CHALLENGE:
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elems->challenge = pos;
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elems->challenge_len = elen;
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break;
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case WLAN_EID_WPA:
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if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
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pos[2] == 0xf2) {
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/* Microsoft OUI (00:50:F2) */
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if (pos[3] == 1) {
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/* OUI Type 1 - WPA IE */
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elems->wpa = pos;
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elems->wpa_len = elen;
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} else if (elen >= 5 && pos[3] == 2) {
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if (pos[4] == 0) {
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elems->wmm_info = pos;
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elems->wmm_info_len = elen;
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} else if (pos[4] == 1) {
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elems->wmm_param = pos;
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elems->wmm_param_len = elen;
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}
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}
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}
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break;
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case WLAN_EID_RSN:
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elems->rsn = pos;
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elems->rsn_len = elen;
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break;
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case WLAN_EID_ERP_INFO:
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elems->erp_info = pos;
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elems->erp_info_len = elen;
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break;
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case WLAN_EID_EXT_SUPP_RATES:
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elems->ext_supp_rates = pos;
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elems->ext_supp_rates_len = elen;
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break;
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case WLAN_EID_HT_CAPABILITY:
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elems->ht_cap_elem = pos;
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elems->ht_cap_elem_len = elen;
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break;
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case WLAN_EID_HT_EXTRA_INFO:
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elems->ht_info_elem = pos;
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elems->ht_info_elem_len = elen;
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break;
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case WLAN_EID_MESH_ID:
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elems->mesh_id = pos;
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elems->mesh_id_len = elen;
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break;
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case WLAN_EID_MESH_CONFIG:
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elems->mesh_config = pos;
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elems->mesh_config_len = elen;
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break;
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case WLAN_EID_PEER_LINK:
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elems->peer_link = pos;
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elems->peer_link_len = elen;
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break;
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case WLAN_EID_PREQ:
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elems->preq = pos;
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elems->preq_len = elen;
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break;
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case WLAN_EID_PREP:
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elems->prep = pos;
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elems->prep_len = elen;
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break;
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case WLAN_EID_PERR:
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elems->perr = pos;
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elems->perr_len = elen;
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break;
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default:
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break;
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}
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left -= elen;
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pos += elen;
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}
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}
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static int ecw2cw(int ecw)
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{
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return (1 << ecw) - 1;
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}
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static void ieee80211_sta_def_wmm_params(struct net_device *dev,
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struct ieee80211_sta_bss *bss,
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int ibss)
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{
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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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struct ieee80211_local *local = sdata->local;
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int i, have_higher_than_11mbit = 0;
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/* cf. IEEE 802.11 9.2.12 */
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for (i = 0; i < bss->supp_rates_len; i++)
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if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
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have_higher_than_11mbit = 1;
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if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
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have_higher_than_11mbit)
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sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
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else
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sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
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if (local->ops->conf_tx) {
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struct ieee80211_tx_queue_params qparam;
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int i;
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memset(&qparam, 0, sizeof(qparam));
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qparam.aifs = 2;
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if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
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!(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
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qparam.cw_min = 31;
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else
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qparam.cw_min = 15;
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qparam.cw_max = 1023;
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qparam.txop = 0;
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for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
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local->ops->conf_tx(local_to_hw(local),
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i + IEEE80211_TX_QUEUE_DATA0,
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&qparam);
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if (ibss) {
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/* IBSS uses different parameters for Beacon sending */
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qparam.cw_min++;
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qparam.cw_min *= 2;
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qparam.cw_min--;
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local->ops->conf_tx(local_to_hw(local),
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IEEE80211_TX_QUEUE_BEACON, &qparam);
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}
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}
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}
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static void ieee80211_sta_wmm_params(struct net_device *dev,
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struct ieee80211_if_sta *ifsta,
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u8 *wmm_param, size_t wmm_param_len)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct ieee80211_tx_queue_params params;
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size_t left;
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int count;
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u8 *pos;
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if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
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return;
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count = wmm_param[6] & 0x0f;
|
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if (count == ifsta->wmm_last_param_set)
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return;
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ifsta->wmm_last_param_set = count;
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pos = wmm_param + 8;
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left = wmm_param_len - 8;
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||
|
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memset(¶ms, 0, sizeof(params));
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||
|
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if (!local->ops->conf_tx)
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return;
|
||
|
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local->wmm_acm = 0;
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for (; left >= 4; left -= 4, pos += 4) {
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int aci = (pos[0] >> 5) & 0x03;
|
||
int acm = (pos[0] >> 4) & 0x01;
|
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int queue;
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||
|
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switch (aci) {
|
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case 1:
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queue = IEEE80211_TX_QUEUE_DATA3;
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if (acm) {
|
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local->wmm_acm |= BIT(0) | BIT(3);
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||
}
|
||
break;
|
||
case 2:
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||
queue = IEEE80211_TX_QUEUE_DATA1;
|
||
if (acm) {
|
||
local->wmm_acm |= BIT(4) | BIT(5);
|
||
}
|
||
break;
|
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case 3:
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queue = IEEE80211_TX_QUEUE_DATA0;
|
||
if (acm) {
|
||
local->wmm_acm |= BIT(6) | BIT(7);
|
||
}
|
||
break;
|
||
case 0:
|
||
default:
|
||
queue = IEEE80211_TX_QUEUE_DATA2;
|
||
if (acm) {
|
||
local->wmm_acm |= BIT(1) | BIT(2);
|
||
}
|
||
break;
|
||
}
|
||
|
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params.aifs = pos[0] & 0x0f;
|
||
params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
|
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params.cw_min = ecw2cw(pos[1] & 0x0f);
|
||
params.txop = pos[2] | (pos[3] << 8);
|
||
#ifdef CONFIG_MAC80211_DEBUG
|
||
printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
|
||
"cWmin=%d cWmax=%d txop=%d\n",
|
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dev->name, queue, aci, acm, params.aifs, params.cw_min,
|
||
params.cw_max, params.txop);
|
||
#endif
|
||
/* TODO: handle ACM (block TX, fallback to next lowest allowed
|
||
* AC for now) */
|
||
if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
|
||
printk(KERN_DEBUG "%s: failed to set TX queue "
|
||
"parameters for queue %d\n", dev->name, queue);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
|
||
u8 erp_value)
|
||
{
|
||
struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
|
||
bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
|
||
DECLARE_MAC_BUF(mac);
|
||
u32 changed = 0;
|
||
|
||
if (use_protection != bss_conf->use_cts_prot) {
|
||
if (net_ratelimit()) {
|
||
printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
|
||
"%s)\n",
|
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sdata->dev->name,
|
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use_protection ? "enabled" : "disabled",
|
||
print_mac(mac, ifsta->bssid));
|
||
}
|
||
bss_conf->use_cts_prot = use_protection;
|
||
changed |= BSS_CHANGED_ERP_CTS_PROT;
|
||
}
|
||
|
||
if (preamble_mode != bss_conf->use_short_preamble) {
|
||
if (net_ratelimit()) {
|
||
printk(KERN_DEBUG "%s: switched to %s barker preamble"
|
||
" (BSSID=%s)\n",
|
||
sdata->dev->name,
|
||
(preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
|
||
"short" : "long",
|
||
print_mac(mac, ifsta->bssid));
|
||
}
|
||
bss_conf->use_short_preamble = preamble_mode;
|
||
changed |= BSS_CHANGED_ERP_PREAMBLE;
|
||
}
|
||
|
||
return changed;
|
||
}
|
||
|
||
int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
|
||
struct ieee80211_ht_info *ht_info)
|
||
{
|
||
|
||
if (ht_info == NULL)
|
||
return -EINVAL;
|
||
|
||
memset(ht_info, 0, sizeof(*ht_info));
|
||
|
||
if (ht_cap_ie) {
|
||
u8 ampdu_info = ht_cap_ie->ampdu_params_info;
|
||
|
||
ht_info->ht_supported = 1;
|
||
ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
|
||
ht_info->ampdu_factor =
|
||
ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
|
||
ht_info->ampdu_density =
|
||
(ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
|
||
memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
|
||
} else
|
||
ht_info->ht_supported = 0;
|
||
|
||
return 0;
|
||
}
|
||
|
||
int ieee80211_ht_addt_info_ie_to_ht_bss_info(
|
||
struct ieee80211_ht_addt_info *ht_add_info_ie,
|
||
struct ieee80211_ht_bss_info *bss_info)
|
||
{
|
||
if (bss_info == NULL)
|
||
return -EINVAL;
|
||
|
||
memset(bss_info, 0, sizeof(*bss_info));
|
||
|
||
if (ht_add_info_ie) {
|
||
u16 op_mode;
|
||
op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
|
||
|
||
bss_info->primary_channel = ht_add_info_ie->control_chan;
|
||
bss_info->bss_cap = ht_add_info_ie->ht_param;
|
||
bss_info->bss_op_mode = (u8)(op_mode & 0xff);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void ieee80211_sta_send_associnfo(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
char *buf;
|
||
size_t len;
|
||
int i;
|
||
union iwreq_data wrqu;
|
||
|
||
if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
|
||
return;
|
||
|
||
buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
|
||
ifsta->assocresp_ies_len), GFP_KERNEL);
|
||
if (!buf)
|
||
return;
|
||
|
||
len = sprintf(buf, "ASSOCINFO(");
|
||
if (ifsta->assocreq_ies) {
|
||
len += sprintf(buf + len, "ReqIEs=");
|
||
for (i = 0; i < ifsta->assocreq_ies_len; i++) {
|
||
len += sprintf(buf + len, "%02x",
|
||
ifsta->assocreq_ies[i]);
|
||
}
|
||
}
|
||
if (ifsta->assocresp_ies) {
|
||
if (ifsta->assocreq_ies)
|
||
len += sprintf(buf + len, " ");
|
||
len += sprintf(buf + len, "RespIEs=");
|
||
for (i = 0; i < ifsta->assocresp_ies_len; i++) {
|
||
len += sprintf(buf + len, "%02x",
|
||
ifsta->assocresp_ies[i]);
|
||
}
|
||
}
|
||
len += sprintf(buf + len, ")");
|
||
|
||
if (len > IW_CUSTOM_MAX) {
|
||
len = sprintf(buf, "ASSOCRESPIE=");
|
||
for (i = 0; i < ifsta->assocresp_ies_len; i++) {
|
||
len += sprintf(buf + len, "%02x",
|
||
ifsta->assocresp_ies[i]);
|
||
}
|
||
}
|
||
|
||
memset(&wrqu, 0, sizeof(wrqu));
|
||
wrqu.data.length = len;
|
||
wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
|
||
|
||
kfree(buf);
|
||
}
|
||
|
||
|
||
static void ieee80211_set_associated(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta,
|
||
bool assoc)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_local *local = sdata->local;
|
||
union iwreq_data wrqu;
|
||
u32 changed = BSS_CHANGED_ASSOC;
|
||
|
||
if (assoc) {
|
||
struct ieee80211_sta_bss *bss;
|
||
|
||
ifsta->flags |= IEEE80211_STA_ASSOCIATED;
|
||
|
||
if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
|
||
return;
|
||
|
||
bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
|
||
local->hw.conf.channel->center_freq,
|
||
ifsta->ssid, ifsta->ssid_len);
|
||
if (bss) {
|
||
if (bss->has_erp_value)
|
||
changed |= ieee80211_handle_erp_ie(
|
||
sdata, bss->erp_value);
|
||
ieee80211_rx_bss_put(dev, bss);
|
||
}
|
||
|
||
netif_carrier_on(dev);
|
||
ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
|
||
memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
|
||
memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
|
||
ieee80211_sta_send_associnfo(dev, ifsta);
|
||
} else {
|
||
ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
|
||
ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
|
||
netif_carrier_off(dev);
|
||
ieee80211_reset_erp_info(dev);
|
||
memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
|
||
}
|
||
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
|
||
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
|
||
ifsta->last_probe = jiffies;
|
||
ieee80211_led_assoc(local, assoc);
|
||
|
||
sdata->bss_conf.assoc = assoc;
|
||
ieee80211_bss_info_change_notify(sdata, changed);
|
||
}
|
||
|
||
static void ieee80211_set_disassoc(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta, int deauth)
|
||
{
|
||
if (deauth)
|
||
ifsta->auth_tries = 0;
|
||
ifsta->assoc_tries = 0;
|
||
ieee80211_set_associated(dev, ifsta, 0);
|
||
}
|
||
|
||
void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
|
||
int encrypt)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata;
|
||
struct ieee80211_tx_packet_data *pkt_data;
|
||
|
||
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
skb->dev = sdata->local->mdev;
|
||
skb_set_mac_header(skb, 0);
|
||
skb_set_network_header(skb, 0);
|
||
skb_set_transport_header(skb, 0);
|
||
|
||
pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
|
||
memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
|
||
pkt_data->ifindex = sdata->dev->ifindex;
|
||
if (!encrypt)
|
||
pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
|
||
|
||
dev_queue_xmit(skb);
|
||
}
|
||
|
||
|
||
static void ieee80211_send_auth(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta,
|
||
int transaction, u8 *extra, size_t extra_len,
|
||
int encrypt)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *mgmt;
|
||
|
||
skb = dev_alloc_skb(local->hw.extra_tx_headroom +
|
||
sizeof(*mgmt) + 6 + extra_len);
|
||
if (!skb) {
|
||
printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
|
||
"frame\n", dev->name);
|
||
return;
|
||
}
|
||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||
|
||
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
|
||
memset(mgmt, 0, 24 + 6);
|
||
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
|
||
IEEE80211_STYPE_AUTH);
|
||
if (encrypt)
|
||
mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
|
||
memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
|
||
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
|
||
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
|
||
mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
|
||
mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
|
||
ifsta->auth_transaction = transaction + 1;
|
||
mgmt->u.auth.status_code = cpu_to_le16(0);
|
||
if (extra)
|
||
memcpy(skb_put(skb, extra_len), extra, extra_len);
|
||
|
||
ieee80211_sta_tx(dev, skb, encrypt);
|
||
}
|
||
|
||
|
||
static void ieee80211_authenticate(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
DECLARE_MAC_BUF(mac);
|
||
|
||
ifsta->auth_tries++;
|
||
if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
|
||
printk(KERN_DEBUG "%s: authentication with AP %s"
|
||
" timed out\n",
|
||
dev->name, print_mac(mac, ifsta->bssid));
|
||
ifsta->state = IEEE80211_DISABLED;
|
||
return;
|
||
}
|
||
|
||
ifsta->state = IEEE80211_AUTHENTICATE;
|
||
printk(KERN_DEBUG "%s: authenticate with AP %s\n",
|
||
dev->name, print_mac(mac, ifsta->bssid));
|
||
|
||
ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
|
||
|
||
mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
|
||
}
|
||
|
||
|
||
static void ieee80211_send_assoc(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *mgmt;
|
||
u8 *pos, *ies;
|
||
int i, len;
|
||
u16 capab;
|
||
struct ieee80211_sta_bss *bss;
|
||
int wmm = 0;
|
||
struct ieee80211_supported_band *sband;
|
||
|
||
skb = dev_alloc_skb(local->hw.extra_tx_headroom +
|
||
sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
|
||
ifsta->ssid_len);
|
||
if (!skb) {
|
||
printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
|
||
"frame\n", dev->name);
|
||
return;
|
||
}
|
||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||
|
||
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
||
|
||
capab = ifsta->capab;
|
||
|
||
if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
|
||
if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
|
||
capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
|
||
if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
|
||
capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
|
||
}
|
||
|
||
bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
|
||
local->hw.conf.channel->center_freq,
|
||
ifsta->ssid, ifsta->ssid_len);
|
||
if (bss) {
|
||
if (bss->capability & WLAN_CAPABILITY_PRIVACY)
|
||
capab |= WLAN_CAPABILITY_PRIVACY;
|
||
if (bss->wmm_ie) {
|
||
wmm = 1;
|
||
}
|
||
ieee80211_rx_bss_put(dev, bss);
|
||
}
|
||
|
||
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
||
memset(mgmt, 0, 24);
|
||
memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
|
||
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
|
||
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
|
||
|
||
if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
|
||
skb_put(skb, 10);
|
||
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
|
||
IEEE80211_STYPE_REASSOC_REQ);
|
||
mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
|
||
mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
|
||
memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
|
||
ETH_ALEN);
|
||
} else {
|
||
skb_put(skb, 4);
|
||
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
|
||
IEEE80211_STYPE_ASSOC_REQ);
|
||
mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
|
||
mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
|
||
}
|
||
|
||
/* SSID */
|
||
ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
|
||
*pos++ = WLAN_EID_SSID;
|
||
*pos++ = ifsta->ssid_len;
|
||
memcpy(pos, ifsta->ssid, ifsta->ssid_len);
|
||
|
||
len = sband->n_bitrates;
|
||
if (len > 8)
|
||
len = 8;
|
||
pos = skb_put(skb, len + 2);
|
||
*pos++ = WLAN_EID_SUPP_RATES;
|
||
*pos++ = len;
|
||
for (i = 0; i < len; i++) {
|
||
int rate = sband->bitrates[i].bitrate;
|
||
*pos++ = (u8) (rate / 5);
|
||
}
|
||
|
||
if (sband->n_bitrates > len) {
|
||
pos = skb_put(skb, sband->n_bitrates - len + 2);
|
||
*pos++ = WLAN_EID_EXT_SUPP_RATES;
|
||
*pos++ = sband->n_bitrates - len;
|
||
for (i = len; i < sband->n_bitrates; i++) {
|
||
int rate = sband->bitrates[i].bitrate;
|
||
*pos++ = (u8) (rate / 5);
|
||
}
|
||
}
|
||
|
||
if (ifsta->extra_ie) {
|
||
pos = skb_put(skb, ifsta->extra_ie_len);
|
||
memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
|
||
}
|
||
|
||
if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
|
||
pos = skb_put(skb, 9);
|
||
*pos++ = WLAN_EID_VENDOR_SPECIFIC;
|
||
*pos++ = 7; /* len */
|
||
*pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
|
||
*pos++ = 0x50;
|
||
*pos++ = 0xf2;
|
||
*pos++ = 2; /* WME */
|
||
*pos++ = 0; /* WME info */
|
||
*pos++ = 1; /* WME ver */
|
||
*pos++ = 0;
|
||
}
|
||
/* wmm support is a must to HT */
|
||
if (wmm && sband->ht_info.ht_supported) {
|
||
__le16 tmp = cpu_to_le16(sband->ht_info.cap);
|
||
pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
|
||
*pos++ = WLAN_EID_HT_CAPABILITY;
|
||
*pos++ = sizeof(struct ieee80211_ht_cap);
|
||
memset(pos, 0, sizeof(struct ieee80211_ht_cap));
|
||
memcpy(pos, &tmp, sizeof(u16));
|
||
pos += sizeof(u16);
|
||
/* TODO: needs a define here for << 2 */
|
||
*pos++ = sband->ht_info.ampdu_factor |
|
||
(sband->ht_info.ampdu_density << 2);
|
||
memcpy(pos, sband->ht_info.supp_mcs_set, 16);
|
||
}
|
||
|
||
kfree(ifsta->assocreq_ies);
|
||
ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
|
||
ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
|
||
if (ifsta->assocreq_ies)
|
||
memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
|
||
|
||
ieee80211_sta_tx(dev, skb, 0);
|
||
}
|
||
|
||
|
||
static void ieee80211_send_deauth(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta, u16 reason)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *mgmt;
|
||
|
||
skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
|
||
if (!skb) {
|
||
printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
|
||
"frame\n", dev->name);
|
||
return;
|
||
}
|
||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||
|
||
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
||
memset(mgmt, 0, 24);
|
||
memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
|
||
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
|
||
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
|
||
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
|
||
IEEE80211_STYPE_DEAUTH);
|
||
skb_put(skb, 2);
|
||
mgmt->u.deauth.reason_code = cpu_to_le16(reason);
|
||
|
||
ieee80211_sta_tx(dev, skb, 0);
|
||
}
|
||
|
||
|
||
static void ieee80211_send_disassoc(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta, u16 reason)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *mgmt;
|
||
|
||
skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
|
||
if (!skb) {
|
||
printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
|
||
"frame\n", dev->name);
|
||
return;
|
||
}
|
||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||
|
||
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
||
memset(mgmt, 0, 24);
|
||
memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
|
||
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
|
||
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
|
||
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
|
||
IEEE80211_STYPE_DISASSOC);
|
||
skb_put(skb, 2);
|
||
mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
|
||
|
||
ieee80211_sta_tx(dev, skb, 0);
|
||
}
|
||
|
||
|
||
static int ieee80211_privacy_mismatch(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sta_bss *bss;
|
||
int bss_privacy;
|
||
int wep_privacy;
|
||
int privacy_invoked;
|
||
|
||
if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
|
||
return 0;
|
||
|
||
bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
|
||
local->hw.conf.channel->center_freq,
|
||
ifsta->ssid, ifsta->ssid_len);
|
||
if (!bss)
|
||
return 0;
|
||
|
||
bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
|
||
wep_privacy = !!ieee80211_sta_wep_configured(dev);
|
||
privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
|
||
|
||
ieee80211_rx_bss_put(dev, bss);
|
||
|
||
if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
|
||
return 0;
|
||
|
||
return 1;
|
||
}
|
||
|
||
|
||
static void ieee80211_associate(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
DECLARE_MAC_BUF(mac);
|
||
|
||
ifsta->assoc_tries++;
|
||
if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
|
||
printk(KERN_DEBUG "%s: association with AP %s"
|
||
" timed out\n",
|
||
dev->name, print_mac(mac, ifsta->bssid));
|
||
ifsta->state = IEEE80211_DISABLED;
|
||
return;
|
||
}
|
||
|
||
ifsta->state = IEEE80211_ASSOCIATE;
|
||
printk(KERN_DEBUG "%s: associate with AP %s\n",
|
||
dev->name, print_mac(mac, ifsta->bssid));
|
||
if (ieee80211_privacy_mismatch(dev, ifsta)) {
|
||
printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
|
||
"mixed-cell disabled - abort association\n", dev->name);
|
||
ifsta->state = IEEE80211_DISABLED;
|
||
return;
|
||
}
|
||
|
||
ieee80211_send_assoc(dev, ifsta);
|
||
|
||
mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
|
||
}
|
||
|
||
|
||
static void ieee80211_associated(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct sta_info *sta;
|
||
int disassoc;
|
||
DECLARE_MAC_BUF(mac);
|
||
|
||
/* TODO: start monitoring current AP signal quality and number of
|
||
* missed beacons. Scan other channels every now and then and search
|
||
* for better APs. */
|
||
/* TODO: remove expired BSSes */
|
||
|
||
ifsta->state = IEEE80211_ASSOCIATED;
|
||
|
||
rcu_read_lock();
|
||
|
||
sta = sta_info_get(local, ifsta->bssid);
|
||
if (!sta) {
|
||
printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
|
||
dev->name, print_mac(mac, ifsta->bssid));
|
||
disassoc = 1;
|
||
} else {
|
||
disassoc = 0;
|
||
if (time_after(jiffies,
|
||
sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
|
||
if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
|
||
printk(KERN_DEBUG "%s: No ProbeResp from "
|
||
"current AP %s - assume out of "
|
||
"range\n",
|
||
dev->name, print_mac(mac, ifsta->bssid));
|
||
disassoc = 1;
|
||
sta_info_unlink(&sta);
|
||
} else
|
||
ieee80211_send_probe_req(dev, ifsta->bssid,
|
||
local->scan_ssid,
|
||
local->scan_ssid_len);
|
||
ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
|
||
} else {
|
||
ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
|
||
if (time_after(jiffies, ifsta->last_probe +
|
||
IEEE80211_PROBE_INTERVAL)) {
|
||
ifsta->last_probe = jiffies;
|
||
ieee80211_send_probe_req(dev, ifsta->bssid,
|
||
ifsta->ssid,
|
||
ifsta->ssid_len);
|
||
}
|
||
}
|
||
}
|
||
|
||
rcu_read_unlock();
|
||
|
||
if (disassoc && sta) {
|
||
synchronize_rcu();
|
||
rtnl_lock();
|
||
sta_info_destroy(sta);
|
||
rtnl_unlock();
|
||
}
|
||
|
||
if (disassoc) {
|
||
ifsta->state = IEEE80211_DISABLED;
|
||
ieee80211_set_associated(dev, ifsta, 0);
|
||
} else {
|
||
mod_timer(&ifsta->timer, jiffies +
|
||
IEEE80211_MONITORING_INTERVAL);
|
||
}
|
||
}
|
||
|
||
|
||
static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
|
||
u8 *ssid, size_t ssid_len)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_supported_band *sband;
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *mgmt;
|
||
u8 *pos, *supp_rates, *esupp_rates = NULL;
|
||
int i;
|
||
|
||
skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
|
||
if (!skb) {
|
||
printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
|
||
"request\n", dev->name);
|
||
return;
|
||
}
|
||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||
|
||
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
||
memset(mgmt, 0, 24);
|
||
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
|
||
IEEE80211_STYPE_PROBE_REQ);
|
||
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
|
||
if (dst) {
|
||
memcpy(mgmt->da, dst, ETH_ALEN);
|
||
memcpy(mgmt->bssid, dst, ETH_ALEN);
|
||
} else {
|
||
memset(mgmt->da, 0xff, ETH_ALEN);
|
||
memset(mgmt->bssid, 0xff, ETH_ALEN);
|
||
}
|
||
pos = skb_put(skb, 2 + ssid_len);
|
||
*pos++ = WLAN_EID_SSID;
|
||
*pos++ = ssid_len;
|
||
memcpy(pos, ssid, ssid_len);
|
||
|
||
supp_rates = skb_put(skb, 2);
|
||
supp_rates[0] = WLAN_EID_SUPP_RATES;
|
||
supp_rates[1] = 0;
|
||
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
||
|
||
for (i = 0; i < sband->n_bitrates; i++) {
|
||
struct ieee80211_rate *rate = &sband->bitrates[i];
|
||
if (esupp_rates) {
|
||
pos = skb_put(skb, 1);
|
||
esupp_rates[1]++;
|
||
} else if (supp_rates[1] == 8) {
|
||
esupp_rates = skb_put(skb, 3);
|
||
esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
|
||
esupp_rates[1] = 1;
|
||
pos = &esupp_rates[2];
|
||
} else {
|
||
pos = skb_put(skb, 1);
|
||
supp_rates[1]++;
|
||
}
|
||
*pos = rate->bitrate / 5;
|
||
}
|
||
|
||
ieee80211_sta_tx(dev, skb, 0);
|
||
}
|
||
|
||
|
||
static int ieee80211_sta_wep_configured(struct net_device *dev)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
if (!sdata || !sdata->default_key ||
|
||
sdata->default_key->conf.alg != ALG_WEP)
|
||
return 0;
|
||
return 1;
|
||
}
|
||
|
||
|
||
static void ieee80211_auth_completed(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
printk(KERN_DEBUG "%s: authenticated\n", dev->name);
|
||
ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
|
||
ieee80211_associate(dev, ifsta);
|
||
}
|
||
|
||
|
||
static void ieee80211_auth_challenge(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len)
|
||
{
|
||
u8 *pos;
|
||
struct ieee802_11_elems elems;
|
||
|
||
printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
|
||
pos = mgmt->u.auth.variable;
|
||
ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
||
if (!elems.challenge) {
|
||
printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
|
||
"frame\n", dev->name);
|
||
return;
|
||
}
|
||
ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
|
||
elems.challenge_len + 2, 1);
|
||
}
|
||
|
||
static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
|
||
u8 dialog_token, u16 status, u16 policy,
|
||
u16 buf_size, u16 timeout)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *mgmt;
|
||
u16 capab;
|
||
|
||
skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
|
||
sizeof(mgmt->u.action.u.addba_resp));
|
||
if (!skb) {
|
||
printk(KERN_DEBUG "%s: failed to allocate buffer "
|
||
"for addba resp frame\n", dev->name);
|
||
return;
|
||
}
|
||
|
||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
||
memset(mgmt, 0, 24);
|
||
memcpy(mgmt->da, da, ETH_ALEN);
|
||
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
|
||
if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
|
||
memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
|
||
else
|
||
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
|
||
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
|
||
IEEE80211_STYPE_ACTION);
|
||
|
||
skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
|
||
mgmt->u.action.category = WLAN_CATEGORY_BACK;
|
||
mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
|
||
mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
|
||
|
||
capab = (u16)(policy << 1); /* bit 1 aggregation policy */
|
||
capab |= (u16)(tid << 2); /* bit 5:2 TID number */
|
||
capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
|
||
|
||
mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
|
||
mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
|
||
mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
|
||
|
||
ieee80211_sta_tx(dev, skb, 0);
|
||
|
||
return;
|
||
}
|
||
|
||
void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
|
||
u16 tid, u8 dialog_token, u16 start_seq_num,
|
||
u16 agg_size, u16 timeout)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *mgmt;
|
||
u16 capab;
|
||
|
||
skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
|
||
sizeof(mgmt->u.action.u.addba_req));
|
||
|
||
|
||
if (!skb) {
|
||
printk(KERN_ERR "%s: failed to allocate buffer "
|
||
"for addba request frame\n", dev->name);
|
||
return;
|
||
}
|
||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
||
memset(mgmt, 0, 24);
|
||
memcpy(mgmt->da, da, ETH_ALEN);
|
||
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
|
||
if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
|
||
memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
|
||
else
|
||
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
|
||
|
||
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
|
||
IEEE80211_STYPE_ACTION);
|
||
|
||
skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
|
||
|
||
mgmt->u.action.category = WLAN_CATEGORY_BACK;
|
||
mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
|
||
|
||
mgmt->u.action.u.addba_req.dialog_token = dialog_token;
|
||
capab = (u16)(1 << 1); /* bit 1 aggregation policy */
|
||
capab |= (u16)(tid << 2); /* bit 5:2 TID number */
|
||
capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
|
||
|
||
mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
|
||
|
||
mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
|
||
mgmt->u.action.u.addba_req.start_seq_num =
|
||
cpu_to_le16(start_seq_num << 4);
|
||
|
||
ieee80211_sta_tx(dev, skb, 0);
|
||
}
|
||
|
||
static void ieee80211_sta_process_addba_request(struct net_device *dev,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_hw *hw = &local->hw;
|
||
struct ieee80211_conf *conf = &hw->conf;
|
||
struct sta_info *sta;
|
||
struct tid_ampdu_rx *tid_agg_rx;
|
||
u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
|
||
u8 dialog_token;
|
||
int ret = -EOPNOTSUPP;
|
||
DECLARE_MAC_BUF(mac);
|
||
|
||
rcu_read_lock();
|
||
|
||
sta = sta_info_get(local, mgmt->sa);
|
||
if (!sta) {
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
|
||
/* extract session parameters from addba request frame */
|
||
dialog_token = mgmt->u.action.u.addba_req.dialog_token;
|
||
timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
|
||
start_seq_num =
|
||
le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
|
||
|
||
capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
|
||
ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
|
||
tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
|
||
buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
|
||
|
||
status = WLAN_STATUS_REQUEST_DECLINED;
|
||
|
||
/* sanity check for incoming parameters:
|
||
* check if configuration can support the BA policy
|
||
* and if buffer size does not exceeds max value */
|
||
if (((ba_policy != 1)
|
||
&& (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
|
||
|| (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
|
||
status = WLAN_STATUS_INVALID_QOS_PARAM;
|
||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
if (net_ratelimit())
|
||
printk(KERN_DEBUG "AddBA Req with bad params from "
|
||
"%s on tid %u. policy %d, buffer size %d\n",
|
||
print_mac(mac, mgmt->sa), tid, ba_policy,
|
||
buf_size);
|
||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||
goto end_no_lock;
|
||
}
|
||
/* determine default buffer size */
|
||
if (buf_size == 0) {
|
||
struct ieee80211_supported_band *sband;
|
||
|
||
sband = local->hw.wiphy->bands[conf->channel->band];
|
||
buf_size = IEEE80211_MIN_AMPDU_BUF;
|
||
buf_size = buf_size << sband->ht_info.ampdu_factor;
|
||
}
|
||
|
||
|
||
/* examine state machine */
|
||
spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
|
||
|
||
if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
|
||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
if (net_ratelimit())
|
||
printk(KERN_DEBUG "unexpected AddBA Req from "
|
||
"%s on tid %u\n",
|
||
print_mac(mac, mgmt->sa), tid);
|
||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||
goto end;
|
||
}
|
||
|
||
/* prepare A-MPDU MLME for Rx aggregation */
|
||
sta->ampdu_mlme.tid_rx[tid] =
|
||
kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
|
||
if (!sta->ampdu_mlme.tid_rx[tid]) {
|
||
if (net_ratelimit())
|
||
printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
|
||
tid);
|
||
goto end;
|
||
}
|
||
/* rx timer */
|
||
sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
|
||
sta_rx_agg_session_timer_expired;
|
||
sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
|
||
(unsigned long)&sta->timer_to_tid[tid];
|
||
init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
|
||
|
||
tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
|
||
|
||
/* prepare reordering buffer */
|
||
tid_agg_rx->reorder_buf =
|
||
kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
|
||
if (!tid_agg_rx->reorder_buf) {
|
||
if (net_ratelimit())
|
||
printk(KERN_ERR "can not allocate reordering buffer "
|
||
"to tid %d\n", tid);
|
||
kfree(sta->ampdu_mlme.tid_rx[tid]);
|
||
goto end;
|
||
}
|
||
memset(tid_agg_rx->reorder_buf, 0,
|
||
buf_size * sizeof(struct sk_buf *));
|
||
|
||
if (local->ops->ampdu_action)
|
||
ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
|
||
sta->addr, tid, &start_seq_num);
|
||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
|
||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||
|
||
if (ret) {
|
||
kfree(tid_agg_rx->reorder_buf);
|
||
kfree(tid_agg_rx);
|
||
sta->ampdu_mlme.tid_rx[tid] = NULL;
|
||
goto end;
|
||
}
|
||
|
||
/* change state and send addba resp */
|
||
sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
|
||
tid_agg_rx->dialog_token = dialog_token;
|
||
tid_agg_rx->ssn = start_seq_num;
|
||
tid_agg_rx->head_seq_num = start_seq_num;
|
||
tid_agg_rx->buf_size = buf_size;
|
||
tid_agg_rx->timeout = timeout;
|
||
tid_agg_rx->stored_mpdu_num = 0;
|
||
status = WLAN_STATUS_SUCCESS;
|
||
end:
|
||
spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
|
||
|
||
end_no_lock:
|
||
ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
|
||
dialog_token, status, 1, buf_size, timeout);
|
||
rcu_read_unlock();
|
||
}
|
||
|
||
static void ieee80211_sta_process_addba_resp(struct net_device *dev,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_hw *hw = &local->hw;
|
||
struct sta_info *sta;
|
||
u16 capab;
|
||
u16 tid;
|
||
u8 *state;
|
||
|
||
rcu_read_lock();
|
||
|
||
sta = sta_info_get(local, mgmt->sa);
|
||
if (!sta) {
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
|
||
capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
|
||
tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
|
||
|
||
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
||
|
||
spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
|
||
|
||
if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
|
||
spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
|
||
printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
|
||
"%d\n", *state);
|
||
goto addba_resp_exit;
|
||
}
|
||
|
||
if (mgmt->u.action.u.addba_resp.dialog_token !=
|
||
sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
|
||
spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
|
||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
|
||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||
goto addba_resp_exit;
|
||
}
|
||
|
||
del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
|
||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
|
||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||
if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
|
||
== WLAN_STATUS_SUCCESS) {
|
||
if (*state & HT_ADDBA_RECEIVED_MSK)
|
||
printk(KERN_DEBUG "double addBA response\n");
|
||
|
||
*state |= HT_ADDBA_RECEIVED_MSK;
|
||
sta->ampdu_mlme.addba_req_num[tid] = 0;
|
||
|
||
if (*state == HT_AGG_STATE_OPERATIONAL) {
|
||
printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
|
||
ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
|
||
}
|
||
|
||
spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
|
||
printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
|
||
} else {
|
||
printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
|
||
|
||
sta->ampdu_mlme.addba_req_num[tid]++;
|
||
/* this will allow the state check in stop_BA_session */
|
||
*state = HT_AGG_STATE_OPERATIONAL;
|
||
spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
|
||
ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
|
||
WLAN_BACK_INITIATOR);
|
||
}
|
||
|
||
addba_resp_exit:
|
||
rcu_read_unlock();
|
||
}
|
||
|
||
void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
|
||
u16 initiator, u16 reason_code)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *mgmt;
|
||
u16 params;
|
||
|
||
skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
|
||
sizeof(mgmt->u.action.u.delba));
|
||
|
||
if (!skb) {
|
||
printk(KERN_ERR "%s: failed to allocate buffer "
|
||
"for delba frame\n", dev->name);
|
||
return;
|
||
}
|
||
|
||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
||
memset(mgmt, 0, 24);
|
||
memcpy(mgmt->da, da, ETH_ALEN);
|
||
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
|
||
if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
|
||
memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
|
||
else
|
||
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
|
||
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
|
||
IEEE80211_STYPE_ACTION);
|
||
|
||
skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
|
||
|
||
mgmt->u.action.category = WLAN_CATEGORY_BACK;
|
||
mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
|
||
params = (u16)(initiator << 11); /* bit 11 initiator */
|
||
params |= (u16)(tid << 12); /* bit 15:12 TID number */
|
||
|
||
mgmt->u.action.u.delba.params = cpu_to_le16(params);
|
||
mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
|
||
|
||
ieee80211_sta_tx(dev, skb, 0);
|
||
}
|
||
|
||
void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
|
||
u16 initiator, u16 reason)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_hw *hw = &local->hw;
|
||
struct sta_info *sta;
|
||
int ret, i;
|
||
|
||
rcu_read_lock();
|
||
|
||
sta = sta_info_get(local, ra);
|
||
if (!sta) {
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
|
||
/* check if TID is in operational state */
|
||
spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
|
||
if (sta->ampdu_mlme.tid_state_rx[tid]
|
||
!= HT_AGG_STATE_OPERATIONAL) {
|
||
spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
sta->ampdu_mlme.tid_state_rx[tid] =
|
||
HT_AGG_STATE_REQ_STOP_BA_MSK |
|
||
(initiator << HT_AGG_STATE_INITIATOR_SHIFT);
|
||
spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
|
||
|
||
/* stop HW Rx aggregation. ampdu_action existence
|
||
* already verified in session init so we add the BUG_ON */
|
||
BUG_ON(!local->ops->ampdu_action);
|
||
|
||
ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
|
||
ra, tid, NULL);
|
||
if (ret)
|
||
printk(KERN_DEBUG "HW problem - can not stop rx "
|
||
"aggergation for tid %d\n", tid);
|
||
|
||
/* shutdown timer has not expired */
|
||
if (initiator != WLAN_BACK_TIMER)
|
||
del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
|
||
|
||
/* check if this is a self generated aggregation halt */
|
||
if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
|
||
ieee80211_send_delba(dev, ra, tid, 0, reason);
|
||
|
||
/* free the reordering buffer */
|
||
for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
|
||
if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
|
||
/* release the reordered frames */
|
||
dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
|
||
sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
|
||
sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
|
||
}
|
||
}
|
||
/* free resources */
|
||
kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
|
||
kfree(sta->ampdu_mlme.tid_rx[tid]);
|
||
sta->ampdu_mlme.tid_rx[tid] = NULL;
|
||
sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
|
||
|
||
rcu_read_unlock();
|
||
}
|
||
|
||
|
||
static void ieee80211_sta_process_delba(struct net_device *dev,
|
||
struct ieee80211_mgmt *mgmt, size_t len)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct sta_info *sta;
|
||
u16 tid, params;
|
||
u16 initiator;
|
||
DECLARE_MAC_BUF(mac);
|
||
|
||
rcu_read_lock();
|
||
|
||
sta = sta_info_get(local, mgmt->sa);
|
||
if (!sta) {
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
|
||
params = le16_to_cpu(mgmt->u.action.u.delba.params);
|
||
tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
|
||
initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
|
||
|
||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
if (net_ratelimit())
|
||
printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
|
||
print_mac(mac, mgmt->sa),
|
||
initiator ? "initiator" : "recipient", tid,
|
||
mgmt->u.action.u.delba.reason_code);
|
||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||
|
||
if (initiator == WLAN_BACK_INITIATOR)
|
||
ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
|
||
WLAN_BACK_INITIATOR, 0);
|
||
else { /* WLAN_BACK_RECIPIENT */
|
||
spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
|
||
sta->ampdu_mlme.tid_state_tx[tid] =
|
||
HT_AGG_STATE_OPERATIONAL;
|
||
spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
|
||
ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
|
||
WLAN_BACK_RECIPIENT);
|
||
}
|
||
rcu_read_unlock();
|
||
}
|
||
|
||
/*
|
||
* After sending add Block Ack request we activated a timer until
|
||
* add Block Ack response will arrive from the recipient.
|
||
* If this timer expires sta_addba_resp_timer_expired will be executed.
|
||
*/
|
||
void sta_addba_resp_timer_expired(unsigned long data)
|
||
{
|
||
/* not an elegant detour, but there is no choice as the timer passes
|
||
* only one argument, and both sta_info and TID are needed, so init
|
||
* flow in sta_info_create gives the TID as data, while the timer_to_id
|
||
* array gives the sta through container_of */
|
||
u16 tid = *(int *)data;
|
||
struct sta_info *temp_sta = container_of((void *)data,
|
||
struct sta_info, timer_to_tid[tid]);
|
||
|
||
struct ieee80211_local *local = temp_sta->local;
|
||
struct ieee80211_hw *hw = &local->hw;
|
||
struct sta_info *sta;
|
||
u8 *state;
|
||
|
||
rcu_read_lock();
|
||
|
||
sta = sta_info_get(local, temp_sta->addr);
|
||
if (!sta) {
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
|
||
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
||
/* check if the TID waits for addBA response */
|
||
spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
|
||
if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
|
||
spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
|
||
*state = HT_AGG_STATE_IDLE;
|
||
printk(KERN_DEBUG "timer expired on tid %d but we are not "
|
||
"expecting addBA response there", tid);
|
||
goto timer_expired_exit;
|
||
}
|
||
|
||
printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
|
||
|
||
/* go through the state check in stop_BA_session */
|
||
*state = HT_AGG_STATE_OPERATIONAL;
|
||
spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
|
||
ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
|
||
WLAN_BACK_INITIATOR);
|
||
|
||
timer_expired_exit:
|
||
rcu_read_unlock();
|
||
}
|
||
|
||
/*
|
||
* After accepting the AddBA Request we activated a timer,
|
||
* resetting it after each frame that arrives from the originator.
|
||
* if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
|
||
*/
|
||
void sta_rx_agg_session_timer_expired(unsigned long data)
|
||
{
|
||
/* not an elegant detour, but there is no choice as the timer passes
|
||
* only one argument, and verious sta_info are needed here, so init
|
||
* flow in sta_info_create gives the TID as data, while the timer_to_id
|
||
* array gives the sta through container_of */
|
||
u8 *ptid = (u8 *)data;
|
||
u8 *timer_to_id = ptid - *ptid;
|
||
struct sta_info *sta = container_of(timer_to_id, struct sta_info,
|
||
timer_to_tid[0]);
|
||
|
||
printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
|
||
ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
|
||
(u16)*ptid, WLAN_BACK_TIMER,
|
||
WLAN_REASON_QSTA_TIMEOUT);
|
||
}
|
||
|
||
void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
int i;
|
||
|
||
for (i = 0; i < STA_TID_NUM; i++) {
|
||
ieee80211_stop_tx_ba_session(&local->hw, addr, i,
|
||
WLAN_BACK_INITIATOR);
|
||
ieee80211_sta_stop_rx_ba_session(dev, addr, i,
|
||
WLAN_BACK_RECIPIENT,
|
||
WLAN_REASON_QSTA_LEAVE_QBSS);
|
||
}
|
||
}
|
||
|
||
static void ieee80211_rx_mgmt_auth(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
u16 auth_alg, auth_transaction, status_code;
|
||
DECLARE_MAC_BUF(mac);
|
||
|
||
if (ifsta->state != IEEE80211_AUTHENTICATE &&
|
||
sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
|
||
printk(KERN_DEBUG "%s: authentication frame received from "
|
||
"%s, but not in authenticate state - ignored\n",
|
||
dev->name, print_mac(mac, mgmt->sa));
|
||
return;
|
||
}
|
||
|
||
if (len < 24 + 6) {
|
||
printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
|
||
"received from %s - ignored\n",
|
||
dev->name, len, print_mac(mac, mgmt->sa));
|
||
return;
|
||
}
|
||
|
||
if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
|
||
memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
|
||
printk(KERN_DEBUG "%s: authentication frame received from "
|
||
"unknown AP (SA=%s BSSID=%s) - "
|
||
"ignored\n", dev->name, print_mac(mac, mgmt->sa),
|
||
print_mac(mac, mgmt->bssid));
|
||
return;
|
||
}
|
||
|
||
if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
|
||
memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
|
||
printk(KERN_DEBUG "%s: authentication frame received from "
|
||
"unknown BSSID (SA=%s BSSID=%s) - "
|
||
"ignored\n", dev->name, print_mac(mac, mgmt->sa),
|
||
print_mac(mac, mgmt->bssid));
|
||
return;
|
||
}
|
||
|
||
auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
|
||
auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
|
||
status_code = le16_to_cpu(mgmt->u.auth.status_code);
|
||
|
||
printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
|
||
"transaction=%d status=%d)\n",
|
||
dev->name, print_mac(mac, mgmt->sa), auth_alg,
|
||
auth_transaction, status_code);
|
||
|
||
if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
|
||
/* IEEE 802.11 standard does not require authentication in IBSS
|
||
* networks and most implementations do not seem to use it.
|
||
* However, try to reply to authentication attempts if someone
|
||
* has actually implemented this.
|
||
* TODO: Could implement shared key authentication. */
|
||
if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
|
||
printk(KERN_DEBUG "%s: unexpected IBSS authentication "
|
||
"frame (alg=%d transaction=%d)\n",
|
||
dev->name, auth_alg, auth_transaction);
|
||
return;
|
||
}
|
||
ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
|
||
}
|
||
|
||
if (auth_alg != ifsta->auth_alg ||
|
||
auth_transaction != ifsta->auth_transaction) {
|
||
printk(KERN_DEBUG "%s: unexpected authentication frame "
|
||
"(alg=%d transaction=%d)\n",
|
||
dev->name, auth_alg, auth_transaction);
|
||
return;
|
||
}
|
||
|
||
if (status_code != WLAN_STATUS_SUCCESS) {
|
||
printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
|
||
"code=%d)\n", dev->name, ifsta->auth_alg, status_code);
|
||
if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
|
||
u8 algs[3];
|
||
const int num_algs = ARRAY_SIZE(algs);
|
||
int i, pos;
|
||
algs[0] = algs[1] = algs[2] = 0xff;
|
||
if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
|
||
algs[0] = WLAN_AUTH_OPEN;
|
||
if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
|
||
algs[1] = WLAN_AUTH_SHARED_KEY;
|
||
if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
|
||
algs[2] = WLAN_AUTH_LEAP;
|
||
if (ifsta->auth_alg == WLAN_AUTH_OPEN)
|
||
pos = 0;
|
||
else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
|
||
pos = 1;
|
||
else
|
||
pos = 2;
|
||
for (i = 0; i < num_algs; i++) {
|
||
pos++;
|
||
if (pos >= num_algs)
|
||
pos = 0;
|
||
if (algs[pos] == ifsta->auth_alg ||
|
||
algs[pos] == 0xff)
|
||
continue;
|
||
if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
|
||
!ieee80211_sta_wep_configured(dev))
|
||
continue;
|
||
ifsta->auth_alg = algs[pos];
|
||
printk(KERN_DEBUG "%s: set auth_alg=%d for "
|
||
"next try\n",
|
||
dev->name, ifsta->auth_alg);
|
||
break;
|
||
}
|
||
}
|
||
return;
|
||
}
|
||
|
||
switch (ifsta->auth_alg) {
|
||
case WLAN_AUTH_OPEN:
|
||
case WLAN_AUTH_LEAP:
|
||
ieee80211_auth_completed(dev, ifsta);
|
||
break;
|
||
case WLAN_AUTH_SHARED_KEY:
|
||
if (ifsta->auth_transaction == 4)
|
||
ieee80211_auth_completed(dev, ifsta);
|
||
else
|
||
ieee80211_auth_challenge(dev, ifsta, mgmt, len);
|
||
break;
|
||
}
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len)
|
||
{
|
||
u16 reason_code;
|
||
DECLARE_MAC_BUF(mac);
|
||
|
||
if (len < 24 + 2) {
|
||
printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
|
||
"received from %s - ignored\n",
|
||
dev->name, len, print_mac(mac, mgmt->sa));
|
||
return;
|
||
}
|
||
|
||
if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
|
||
printk(KERN_DEBUG "%s: deauthentication frame received from "
|
||
"unknown AP (SA=%s BSSID=%s) - "
|
||
"ignored\n", dev->name, print_mac(mac, mgmt->sa),
|
||
print_mac(mac, mgmt->bssid));
|
||
return;
|
||
}
|
||
|
||
reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
|
||
|
||
printk(KERN_DEBUG "%s: RX deauthentication from %s"
|
||
" (reason=%d)\n",
|
||
dev->name, print_mac(mac, mgmt->sa), reason_code);
|
||
|
||
if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
|
||
printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
|
||
}
|
||
|
||
if (ifsta->state == IEEE80211_AUTHENTICATE ||
|
||
ifsta->state == IEEE80211_ASSOCIATE ||
|
||
ifsta->state == IEEE80211_ASSOCIATED) {
|
||
ifsta->state = IEEE80211_AUTHENTICATE;
|
||
mod_timer(&ifsta->timer, jiffies +
|
||
IEEE80211_RETRY_AUTH_INTERVAL);
|
||
}
|
||
|
||
ieee80211_set_disassoc(dev, ifsta, 1);
|
||
ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len)
|
||
{
|
||
u16 reason_code;
|
||
DECLARE_MAC_BUF(mac);
|
||
|
||
if (len < 24 + 2) {
|
||
printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
|
||
"received from %s - ignored\n",
|
||
dev->name, len, print_mac(mac, mgmt->sa));
|
||
return;
|
||
}
|
||
|
||
if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
|
||
printk(KERN_DEBUG "%s: disassociation frame received from "
|
||
"unknown AP (SA=%s BSSID=%s) - "
|
||
"ignored\n", dev->name, print_mac(mac, mgmt->sa),
|
||
print_mac(mac, mgmt->bssid));
|
||
return;
|
||
}
|
||
|
||
reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
|
||
|
||
printk(KERN_DEBUG "%s: RX disassociation from %s"
|
||
" (reason=%d)\n",
|
||
dev->name, print_mac(mac, mgmt->sa), reason_code);
|
||
|
||
if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
|
||
printk(KERN_DEBUG "%s: disassociated\n", dev->name);
|
||
|
||
if (ifsta->state == IEEE80211_ASSOCIATED) {
|
||
ifsta->state = IEEE80211_ASSOCIATE;
|
||
mod_timer(&ifsta->timer, jiffies +
|
||
IEEE80211_RETRY_AUTH_INTERVAL);
|
||
}
|
||
|
||
ieee80211_set_disassoc(dev, ifsta, 0);
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len,
|
||
int reassoc)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct net_device *dev = sdata->dev;
|
||
struct ieee80211_supported_band *sband;
|
||
struct sta_info *sta;
|
||
u64 rates, basic_rates;
|
||
u16 capab_info, status_code, aid;
|
||
struct ieee802_11_elems elems;
|
||
struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
|
||
u8 *pos;
|
||
int i, j;
|
||
DECLARE_MAC_BUF(mac);
|
||
bool have_higher_than_11mbit = false;
|
||
|
||
/* AssocResp and ReassocResp have identical structure, so process both
|
||
* of them in this function. */
|
||
|
||
if (ifsta->state != IEEE80211_ASSOCIATE) {
|
||
printk(KERN_DEBUG "%s: association frame received from "
|
||
"%s, but not in associate state - ignored\n",
|
||
dev->name, print_mac(mac, mgmt->sa));
|
||
return;
|
||
}
|
||
|
||
if (len < 24 + 6) {
|
||
printk(KERN_DEBUG "%s: too short (%zd) association frame "
|
||
"received from %s - ignored\n",
|
||
dev->name, len, print_mac(mac, mgmt->sa));
|
||
return;
|
||
}
|
||
|
||
if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
|
||
printk(KERN_DEBUG "%s: association frame received from "
|
||
"unknown AP (SA=%s BSSID=%s) - "
|
||
"ignored\n", dev->name, print_mac(mac, mgmt->sa),
|
||
print_mac(mac, mgmt->bssid));
|
||
return;
|
||
}
|
||
|
||
capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
|
||
status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
|
||
aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
|
||
|
||
printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
|
||
"status=%d aid=%d)\n",
|
||
dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
|
||
capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
|
||
|
||
if (status_code != WLAN_STATUS_SUCCESS) {
|
||
printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
|
||
dev->name, status_code);
|
||
/* if this was a reassociation, ensure we try a "full"
|
||
* association next time. This works around some broken APs
|
||
* which do not correctly reject reassociation requests. */
|
||
ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
|
||
return;
|
||
}
|
||
|
||
if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
|
||
printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
|
||
"set\n", dev->name, aid);
|
||
aid &= ~(BIT(15) | BIT(14));
|
||
|
||
pos = mgmt->u.assoc_resp.variable;
|
||
ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
||
|
||
if (!elems.supp_rates) {
|
||
printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
|
||
dev->name);
|
||
return;
|
||
}
|
||
|
||
printk(KERN_DEBUG "%s: associated\n", dev->name);
|
||
ifsta->aid = aid;
|
||
ifsta->ap_capab = capab_info;
|
||
|
||
kfree(ifsta->assocresp_ies);
|
||
ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
|
||
ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
|
||
if (ifsta->assocresp_ies)
|
||
memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
|
||
|
||
rcu_read_lock();
|
||
|
||
/* Add STA entry for the AP */
|
||
sta = sta_info_get(local, ifsta->bssid);
|
||
if (!sta) {
|
||
struct ieee80211_sta_bss *bss;
|
||
int err;
|
||
|
||
sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
|
||
if (!sta) {
|
||
printk(KERN_DEBUG "%s: failed to alloc STA entry for"
|
||
" the AP\n", dev->name);
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
|
||
local->hw.conf.channel->center_freq,
|
||
ifsta->ssid, ifsta->ssid_len);
|
||
if (bss) {
|
||
sta->last_rssi = bss->rssi;
|
||
sta->last_signal = bss->signal;
|
||
sta->last_noise = bss->noise;
|
||
ieee80211_rx_bss_put(dev, bss);
|
||
}
|
||
|
||
err = sta_info_insert(sta);
|
||
if (err) {
|
||
printk(KERN_DEBUG "%s: failed to insert STA entry for"
|
||
" the AP (error %d)\n", dev->name, err);
|
||
sta_info_destroy(sta);
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* FIXME: Do we really need to update the sta_info's information here?
|
||
* We already know about the AP (we found it in our list) so it
|
||
* should already be filled with the right info, no?
|
||
* As is stands, all this is racy because typically we assume
|
||
* the information that is filled in here (except flags) doesn't
|
||
* change while a STA structure is alive. As such, it should move
|
||
* to between the sta_info_alloc() and sta_info_insert() above.
|
||
*/
|
||
|
||
sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
|
||
WLAN_STA_AUTHORIZED;
|
||
|
||
rates = 0;
|
||
basic_rates = 0;
|
||
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
||
|
||
for (i = 0; i < elems.supp_rates_len; i++) {
|
||
int rate = (elems.supp_rates[i] & 0x7f) * 5;
|
||
|
||
if (rate > 110)
|
||
have_higher_than_11mbit = true;
|
||
|
||
for (j = 0; j < sband->n_bitrates; j++) {
|
||
if (sband->bitrates[j].bitrate == rate)
|
||
rates |= BIT(j);
|
||
if (elems.supp_rates[i] & 0x80)
|
||
basic_rates |= BIT(j);
|
||
}
|
||
}
|
||
|
||
for (i = 0; i < elems.ext_supp_rates_len; i++) {
|
||
int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
|
||
|
||
if (rate > 110)
|
||
have_higher_than_11mbit = true;
|
||
|
||
for (j = 0; j < sband->n_bitrates; j++) {
|
||
if (sband->bitrates[j].bitrate == rate)
|
||
rates |= BIT(j);
|
||
if (elems.ext_supp_rates[i] & 0x80)
|
||
basic_rates |= BIT(j);
|
||
}
|
||
}
|
||
|
||
sta->supp_rates[local->hw.conf.channel->band] = rates;
|
||
sdata->basic_rates = basic_rates;
|
||
|
||
/* cf. IEEE 802.11 9.2.12 */
|
||
if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
|
||
have_higher_than_11mbit)
|
||
sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
|
||
else
|
||
sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
|
||
|
||
if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
|
||
local->ops->conf_ht) {
|
||
struct ieee80211_ht_bss_info bss_info;
|
||
|
||
ieee80211_ht_cap_ie_to_ht_info(
|
||
(struct ieee80211_ht_cap *)
|
||
elems.ht_cap_elem, &sta->ht_info);
|
||
ieee80211_ht_addt_info_ie_to_ht_bss_info(
|
||
(struct ieee80211_ht_addt_info *)
|
||
elems.ht_info_elem, &bss_info);
|
||
ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
|
||
}
|
||
|
||
rate_control_rate_init(sta, local);
|
||
|
||
if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
|
||
sta->flags |= WLAN_STA_WME;
|
||
rcu_read_unlock();
|
||
ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
|
||
elems.wmm_param_len);
|
||
} else
|
||
rcu_read_unlock();
|
||
|
||
/* set AID, ieee80211_set_associated() will tell the driver */
|
||
bss_conf->aid = aid;
|
||
ieee80211_set_associated(dev, ifsta, 1);
|
||
|
||
ieee80211_associated(dev, ifsta);
|
||
}
|
||
|
||
|
||
/* Caller must hold local->sta_bss_lock */
|
||
static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
|
||
struct ieee80211_sta_bss *bss)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
u8 hash_idx;
|
||
|
||
if (bss_mesh_cfg(bss))
|
||
hash_idx = mesh_id_hash(bss_mesh_id(bss),
|
||
bss_mesh_id_len(bss));
|
||
else
|
||
hash_idx = STA_HASH(bss->bssid);
|
||
|
||
bss->hnext = local->sta_bss_hash[hash_idx];
|
||
local->sta_bss_hash[hash_idx] = bss;
|
||
}
|
||
|
||
|
||
/* Caller must hold local->sta_bss_lock */
|
||
static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
|
||
struct ieee80211_sta_bss *bss)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sta_bss *b, *prev = NULL;
|
||
b = local->sta_bss_hash[STA_HASH(bss->bssid)];
|
||
while (b) {
|
||
if (b == bss) {
|
||
if (!prev)
|
||
local->sta_bss_hash[STA_HASH(bss->bssid)] =
|
||
bss->hnext;
|
||
else
|
||
prev->hnext = bss->hnext;
|
||
break;
|
||
}
|
||
prev = b;
|
||
b = b->hnext;
|
||
}
|
||
}
|
||
|
||
|
||
static struct ieee80211_sta_bss *
|
||
ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
|
||
u8 *ssid, u8 ssid_len)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sta_bss *bss;
|
||
|
||
bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
|
||
if (!bss)
|
||
return NULL;
|
||
atomic_inc(&bss->users);
|
||
atomic_inc(&bss->users);
|
||
memcpy(bss->bssid, bssid, ETH_ALEN);
|
||
bss->freq = freq;
|
||
if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
|
||
memcpy(bss->ssid, ssid, ssid_len);
|
||
bss->ssid_len = ssid_len;
|
||
}
|
||
|
||
spin_lock_bh(&local->sta_bss_lock);
|
||
/* TODO: order by RSSI? */
|
||
list_add_tail(&bss->list, &local->sta_bss_list);
|
||
__ieee80211_rx_bss_hash_add(dev, bss);
|
||
spin_unlock_bh(&local->sta_bss_lock);
|
||
return bss;
|
||
}
|
||
|
||
static struct ieee80211_sta_bss *
|
||
ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
|
||
u8 *ssid, u8 ssid_len)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sta_bss *bss;
|
||
|
||
spin_lock_bh(&local->sta_bss_lock);
|
||
bss = local->sta_bss_hash[STA_HASH(bssid)];
|
||
while (bss) {
|
||
if (!bss_mesh_cfg(bss) &&
|
||
!memcmp(bss->bssid, bssid, ETH_ALEN) &&
|
||
bss->freq == freq &&
|
||
bss->ssid_len == ssid_len &&
|
||
(ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
|
||
atomic_inc(&bss->users);
|
||
break;
|
||
}
|
||
bss = bss->hnext;
|
||
}
|
||
spin_unlock_bh(&local->sta_bss_lock);
|
||
return bss;
|
||
}
|
||
|
||
#ifdef CONFIG_MAC80211_MESH
|
||
static struct ieee80211_sta_bss *
|
||
ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
|
||
u8 *mesh_cfg, int freq)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sta_bss *bss;
|
||
|
||
spin_lock_bh(&local->sta_bss_lock);
|
||
bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
|
||
while (bss) {
|
||
if (bss_mesh_cfg(bss) &&
|
||
!memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
|
||
bss->freq == freq &&
|
||
mesh_id_len == bss->mesh_id_len &&
|
||
(mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
|
||
mesh_id_len))) {
|
||
atomic_inc(&bss->users);
|
||
break;
|
||
}
|
||
bss = bss->hnext;
|
||
}
|
||
spin_unlock_bh(&local->sta_bss_lock);
|
||
return bss;
|
||
}
|
||
|
||
static struct ieee80211_sta_bss *
|
||
ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
|
||
u8 *mesh_cfg, int freq)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sta_bss *bss;
|
||
|
||
bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
|
||
if (!bss)
|
||
return NULL;
|
||
|
||
bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
|
||
if (!bss->mesh_cfg) {
|
||
kfree(bss);
|
||
return NULL;
|
||
}
|
||
|
||
if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
|
||
bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
|
||
if (!bss->mesh_id) {
|
||
kfree(bss->mesh_cfg);
|
||
kfree(bss);
|
||
return NULL;
|
||
}
|
||
memcpy(bss->mesh_id, mesh_id, mesh_id_len);
|
||
}
|
||
|
||
atomic_inc(&bss->users);
|
||
atomic_inc(&bss->users);
|
||
memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
|
||
bss->mesh_id_len = mesh_id_len;
|
||
bss->freq = freq;
|
||
spin_lock_bh(&local->sta_bss_lock);
|
||
/* TODO: order by RSSI? */
|
||
list_add_tail(&bss->list, &local->sta_bss_list);
|
||
__ieee80211_rx_bss_hash_add(dev, bss);
|
||
spin_unlock_bh(&local->sta_bss_lock);
|
||
return bss;
|
||
}
|
||
#endif
|
||
|
||
static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
|
||
{
|
||
kfree(bss->wpa_ie);
|
||
kfree(bss->rsn_ie);
|
||
kfree(bss->wmm_ie);
|
||
kfree(bss->ht_ie);
|
||
kfree(bss_mesh_id(bss));
|
||
kfree(bss_mesh_cfg(bss));
|
||
kfree(bss);
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_bss_put(struct net_device *dev,
|
||
struct ieee80211_sta_bss *bss)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
if (!atomic_dec_and_test(&bss->users))
|
||
return;
|
||
|
||
spin_lock_bh(&local->sta_bss_lock);
|
||
__ieee80211_rx_bss_hash_del(dev, bss);
|
||
list_del(&bss->list);
|
||
spin_unlock_bh(&local->sta_bss_lock);
|
||
ieee80211_rx_bss_free(bss);
|
||
}
|
||
|
||
|
||
void ieee80211_rx_bss_list_init(struct net_device *dev)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
spin_lock_init(&local->sta_bss_lock);
|
||
INIT_LIST_HEAD(&local->sta_bss_list);
|
||
}
|
||
|
||
|
||
void ieee80211_rx_bss_list_deinit(struct net_device *dev)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sta_bss *bss, *tmp;
|
||
|
||
list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
|
||
ieee80211_rx_bss_put(dev, bss);
|
||
}
|
||
|
||
|
||
static int ieee80211_sta_join_ibss(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_sta_bss *bss)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
int res, rates, i, j;
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *mgmt;
|
||
struct ieee80211_tx_control control;
|
||
struct rate_selection ratesel;
|
||
u8 *pos;
|
||
struct ieee80211_sub_if_data *sdata;
|
||
struct ieee80211_supported_band *sband;
|
||
|
||
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
||
|
||
/* Remove possible STA entries from other IBSS networks. */
|
||
sta_info_flush(local, NULL);
|
||
|
||
if (local->ops->reset_tsf) {
|
||
/* Reset own TSF to allow time synchronization work. */
|
||
local->ops->reset_tsf(local_to_hw(local));
|
||
}
|
||
memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
|
||
res = ieee80211_if_config(dev);
|
||
if (res)
|
||
return res;
|
||
|
||
local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
|
||
|
||
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
sdata->drop_unencrypted = bss->capability &
|
||
WLAN_CAPABILITY_PRIVACY ? 1 : 0;
|
||
|
||
res = ieee80211_set_freq(local, bss->freq);
|
||
|
||
if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
|
||
printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
|
||
"%d MHz\n", dev->name, local->oper_channel->center_freq);
|
||
return -1;
|
||
}
|
||
|
||
/* Set beacon template */
|
||
skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
|
||
do {
|
||
if (!skb)
|
||
break;
|
||
|
||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||
|
||
mgmt = (struct ieee80211_mgmt *)
|
||
skb_put(skb, 24 + sizeof(mgmt->u.beacon));
|
||
memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
|
||
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
|
||
IEEE80211_STYPE_BEACON);
|
||
memset(mgmt->da, 0xff, ETH_ALEN);
|
||
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
|
||
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
|
||
mgmt->u.beacon.beacon_int =
|
||
cpu_to_le16(local->hw.conf.beacon_int);
|
||
mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
|
||
|
||
pos = skb_put(skb, 2 + ifsta->ssid_len);
|
||
*pos++ = WLAN_EID_SSID;
|
||
*pos++ = ifsta->ssid_len;
|
||
memcpy(pos, ifsta->ssid, ifsta->ssid_len);
|
||
|
||
rates = bss->supp_rates_len;
|
||
if (rates > 8)
|
||
rates = 8;
|
||
pos = skb_put(skb, 2 + rates);
|
||
*pos++ = WLAN_EID_SUPP_RATES;
|
||
*pos++ = rates;
|
||
memcpy(pos, bss->supp_rates, rates);
|
||
|
||
if (bss->band == IEEE80211_BAND_2GHZ) {
|
||
pos = skb_put(skb, 2 + 1);
|
||
*pos++ = WLAN_EID_DS_PARAMS;
|
||
*pos++ = 1;
|
||
*pos++ = ieee80211_frequency_to_channel(bss->freq);
|
||
}
|
||
|
||
pos = skb_put(skb, 2 + 2);
|
||
*pos++ = WLAN_EID_IBSS_PARAMS;
|
||
*pos++ = 2;
|
||
/* FIX: set ATIM window based on scan results */
|
||
*pos++ = 0;
|
||
*pos++ = 0;
|
||
|
||
if (bss->supp_rates_len > 8) {
|
||
rates = bss->supp_rates_len - 8;
|
||
pos = skb_put(skb, 2 + rates);
|
||
*pos++ = WLAN_EID_EXT_SUPP_RATES;
|
||
*pos++ = rates;
|
||
memcpy(pos, &bss->supp_rates[8], rates);
|
||
}
|
||
|
||
memset(&control, 0, sizeof(control));
|
||
rate_control_get_rate(dev, sband, skb, &ratesel);
|
||
if (!ratesel.rate) {
|
||
printk(KERN_DEBUG "%s: Failed to determine TX rate "
|
||
"for IBSS beacon\n", dev->name);
|
||
break;
|
||
}
|
||
control.vif = &sdata->vif;
|
||
control.tx_rate = ratesel.rate;
|
||
if (sdata->bss_conf.use_short_preamble &&
|
||
ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
|
||
control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
|
||
control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
|
||
control.flags |= IEEE80211_TXCTL_NO_ACK;
|
||
control.retry_limit = 1;
|
||
|
||
ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
|
||
if (ifsta->probe_resp) {
|
||
mgmt = (struct ieee80211_mgmt *)
|
||
ifsta->probe_resp->data;
|
||
mgmt->frame_control =
|
||
IEEE80211_FC(IEEE80211_FTYPE_MGMT,
|
||
IEEE80211_STYPE_PROBE_RESP);
|
||
} else {
|
||
printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
|
||
"template for IBSS\n", dev->name);
|
||
}
|
||
|
||
if (local->ops->beacon_update &&
|
||
local->ops->beacon_update(local_to_hw(local),
|
||
skb, &control) == 0) {
|
||
printk(KERN_DEBUG "%s: Configured IBSS beacon "
|
||
"template\n", dev->name);
|
||
skb = NULL;
|
||
}
|
||
|
||
rates = 0;
|
||
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
||
for (i = 0; i < bss->supp_rates_len; i++) {
|
||
int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
|
||
for (j = 0; j < sband->n_bitrates; j++)
|
||
if (sband->bitrates[j].bitrate == bitrate)
|
||
rates |= BIT(j);
|
||
}
|
||
ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
|
||
|
||
ieee80211_sta_def_wmm_params(dev, bss, 1);
|
||
} while (0);
|
||
|
||
if (skb) {
|
||
printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
|
||
"template\n", dev->name);
|
||
dev_kfree_skb(skb);
|
||
}
|
||
|
||
ifsta->state = IEEE80211_IBSS_JOINED;
|
||
mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
|
||
|
||
ieee80211_rx_bss_put(dev, bss);
|
||
|
||
return res;
|
||
}
|
||
|
||
u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
|
||
struct ieee802_11_elems *elems,
|
||
enum ieee80211_band band)
|
||
{
|
||
struct ieee80211_supported_band *sband;
|
||
struct ieee80211_rate *bitrates;
|
||
size_t num_rates;
|
||
u64 supp_rates;
|
||
int i, j;
|
||
sband = local->hw.wiphy->bands[band];
|
||
|
||
if (!sband) {
|
||
WARN_ON(1);
|
||
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
||
}
|
||
|
||
bitrates = sband->bitrates;
|
||
num_rates = sband->n_bitrates;
|
||
supp_rates = 0;
|
||
for (i = 0; i < elems->supp_rates_len +
|
||
elems->ext_supp_rates_len; i++) {
|
||
u8 rate = 0;
|
||
int own_rate;
|
||
if (i < elems->supp_rates_len)
|
||
rate = elems->supp_rates[i];
|
||
else if (elems->ext_supp_rates)
|
||
rate = elems->ext_supp_rates
|
||
[i - elems->supp_rates_len];
|
||
own_rate = 5 * (rate & 0x7f);
|
||
for (j = 0; j < num_rates; j++)
|
||
if (bitrates[j].bitrate == own_rate)
|
||
supp_rates |= BIT(j);
|
||
}
|
||
return supp_rates;
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_bss_info(struct net_device *dev,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len,
|
||
struct ieee80211_rx_status *rx_status,
|
||
int beacon)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee802_11_elems elems;
|
||
size_t baselen;
|
||
int freq, clen;
|
||
struct ieee80211_sta_bss *bss;
|
||
struct sta_info *sta;
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
u64 beacon_timestamp, rx_timestamp;
|
||
struct ieee80211_channel *channel;
|
||
DECLARE_MAC_BUF(mac);
|
||
DECLARE_MAC_BUF(mac2);
|
||
|
||
if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
|
||
return; /* ignore ProbeResp to foreign address */
|
||
|
||
#if 0
|
||
printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
|
||
dev->name, beacon ? "Beacon" : "Probe Response",
|
||
print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
|
||
#endif
|
||
|
||
baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
|
||
if (baselen > len)
|
||
return;
|
||
|
||
beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
|
||
ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
|
||
|
||
if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
|
||
elems.mesh_config && mesh_matches_local(&elems, dev)) {
|
||
u64 rates = ieee80211_sta_get_rates(local, &elems,
|
||
rx_status->band);
|
||
|
||
mesh_neighbour_update(mgmt->sa, rates, dev,
|
||
mesh_peer_accepts_plinks(&elems, dev));
|
||
}
|
||
|
||
rcu_read_lock();
|
||
|
||
if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
|
||
memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
|
||
(sta = sta_info_get(local, mgmt->sa))) {
|
||
u64 prev_rates;
|
||
u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
|
||
rx_status->band);
|
||
|
||
prev_rates = sta->supp_rates[rx_status->band];
|
||
sta->supp_rates[rx_status->band] &= supp_rates;
|
||
if (sta->supp_rates[rx_status->band] == 0) {
|
||
/* No matching rates - this should not really happen.
|
||
* Make sure that at least one rate is marked
|
||
* supported to avoid issues with TX rate ctrl. */
|
||
sta->supp_rates[rx_status->band] =
|
||
sdata->u.sta.supp_rates_bits[rx_status->band];
|
||
}
|
||
if (sta->supp_rates[rx_status->band] != prev_rates) {
|
||
printk(KERN_DEBUG "%s: updated supp_rates set for "
|
||
"%s based on beacon info (0x%llx & 0x%llx -> "
|
||
"0x%llx)\n",
|
||
dev->name, print_mac(mac, sta->addr),
|
||
(unsigned long long) prev_rates,
|
||
(unsigned long long) supp_rates,
|
||
(unsigned long long) sta->supp_rates[rx_status->band]);
|
||
}
|
||
}
|
||
|
||
rcu_read_unlock();
|
||
|
||
if (elems.ds_params && elems.ds_params_len == 1)
|
||
freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
|
||
else
|
||
freq = rx_status->freq;
|
||
|
||
channel = ieee80211_get_channel(local->hw.wiphy, freq);
|
||
|
||
if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
|
||
return;
|
||
|
||
#ifdef CONFIG_MAC80211_MESH
|
||
if (elems.mesh_config)
|
||
bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
|
||
elems.mesh_id_len, elems.mesh_config, freq);
|
||
else
|
||
#endif
|
||
bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
|
||
elems.ssid, elems.ssid_len);
|
||
if (!bss) {
|
||
#ifdef CONFIG_MAC80211_MESH
|
||
if (elems.mesh_config)
|
||
bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
|
||
elems.mesh_id_len, elems.mesh_config, freq);
|
||
else
|
||
#endif
|
||
bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
|
||
elems.ssid, elems.ssid_len);
|
||
if (!bss)
|
||
return;
|
||
} else {
|
||
#if 0
|
||
/* TODO: order by RSSI? */
|
||
spin_lock_bh(&local->sta_bss_lock);
|
||
list_move_tail(&bss->list, &local->sta_bss_list);
|
||
spin_unlock_bh(&local->sta_bss_lock);
|
||
#endif
|
||
}
|
||
|
||
bss->band = rx_status->band;
|
||
|
||
if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
|
||
bss->probe_resp && beacon) {
|
||
/* STA mode:
|
||
* Do not allow beacon to override data from Probe Response. */
|
||
ieee80211_rx_bss_put(dev, bss);
|
||
return;
|
||
}
|
||
|
||
/* save the ERP value so that it is available at association time */
|
||
if (elems.erp_info && elems.erp_info_len >= 1) {
|
||
bss->erp_value = elems.erp_info[0];
|
||
bss->has_erp_value = 1;
|
||
}
|
||
|
||
bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
|
||
bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
|
||
|
||
bss->supp_rates_len = 0;
|
||
if (elems.supp_rates) {
|
||
clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
|
||
if (clen > elems.supp_rates_len)
|
||
clen = elems.supp_rates_len;
|
||
memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
|
||
clen);
|
||
bss->supp_rates_len += clen;
|
||
}
|
||
if (elems.ext_supp_rates) {
|
||
clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
|
||
if (clen > elems.ext_supp_rates_len)
|
||
clen = elems.ext_supp_rates_len;
|
||
memcpy(&bss->supp_rates[bss->supp_rates_len],
|
||
elems.ext_supp_rates, clen);
|
||
bss->supp_rates_len += clen;
|
||
}
|
||
|
||
if (elems.wpa &&
|
||
(!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
|
||
memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
|
||
kfree(bss->wpa_ie);
|
||
bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
|
||
if (bss->wpa_ie) {
|
||
memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
|
||
bss->wpa_ie_len = elems.wpa_len + 2;
|
||
} else
|
||
bss->wpa_ie_len = 0;
|
||
} else if (!elems.wpa && bss->wpa_ie) {
|
||
kfree(bss->wpa_ie);
|
||
bss->wpa_ie = NULL;
|
||
bss->wpa_ie_len = 0;
|
||
}
|
||
|
||
if (elems.rsn &&
|
||
(!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
|
||
memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
|
||
kfree(bss->rsn_ie);
|
||
bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
|
||
if (bss->rsn_ie) {
|
||
memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
|
||
bss->rsn_ie_len = elems.rsn_len + 2;
|
||
} else
|
||
bss->rsn_ie_len = 0;
|
||
} else if (!elems.rsn && bss->rsn_ie) {
|
||
kfree(bss->rsn_ie);
|
||
bss->rsn_ie = NULL;
|
||
bss->rsn_ie_len = 0;
|
||
}
|
||
|
||
if (elems.wmm_param &&
|
||
(!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
|
||
memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
|
||
kfree(bss->wmm_ie);
|
||
bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
|
||
if (bss->wmm_ie) {
|
||
memcpy(bss->wmm_ie, elems.wmm_param - 2,
|
||
elems.wmm_param_len + 2);
|
||
bss->wmm_ie_len = elems.wmm_param_len + 2;
|
||
} else
|
||
bss->wmm_ie_len = 0;
|
||
} else if (!elems.wmm_param && bss->wmm_ie) {
|
||
kfree(bss->wmm_ie);
|
||
bss->wmm_ie = NULL;
|
||
bss->wmm_ie_len = 0;
|
||
}
|
||
if (elems.ht_cap_elem &&
|
||
(!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
|
||
memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
|
||
kfree(bss->ht_ie);
|
||
bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
|
||
if (bss->ht_ie) {
|
||
memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
|
||
elems.ht_cap_elem_len + 2);
|
||
bss->ht_ie_len = elems.ht_cap_elem_len + 2;
|
||
} else
|
||
bss->ht_ie_len = 0;
|
||
} else if (!elems.ht_cap_elem && bss->ht_ie) {
|
||
kfree(bss->ht_ie);
|
||
bss->ht_ie = NULL;
|
||
bss->ht_ie_len = 0;
|
||
}
|
||
|
||
bss->timestamp = beacon_timestamp;
|
||
bss->last_update = jiffies;
|
||
bss->rssi = rx_status->ssi;
|
||
bss->signal = rx_status->signal;
|
||
bss->noise = rx_status->noise;
|
||
if (!beacon)
|
||
bss->probe_resp++;
|
||
|
||
/* check if we need to merge IBSS */
|
||
if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
|
||
!local->sta_sw_scanning && !local->sta_hw_scanning &&
|
||
bss->capability & WLAN_CAPABILITY_IBSS &&
|
||
bss->freq == local->oper_channel->center_freq &&
|
||
elems.ssid_len == sdata->u.sta.ssid_len &&
|
||
memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
|
||
if (rx_status->flag & RX_FLAG_TSFT) {
|
||
/* in order for correct IBSS merging we need mactime
|
||
*
|
||
* since mactime is defined as the time the first data
|
||
* symbol of the frame hits the PHY, and the timestamp
|
||
* of the beacon is defined as "the time that the data
|
||
* symbol containing the first bit of the timestamp is
|
||
* transmitted to the PHY plus the transmitting STA’s
|
||
* delays through its local PHY from the MAC-PHY
|
||
* interface to its interface with the WM"
|
||
* (802.11 11.1.2) - equals the time this bit arrives at
|
||
* the receiver - we have to take into account the
|
||
* offset between the two.
|
||
* e.g: at 1 MBit that means mactime is 192 usec earlier
|
||
* (=24 bytes * 8 usecs/byte) than the beacon timestamp.
|
||
*/
|
||
int rate = local->hw.wiphy->bands[rx_status->band]->
|
||
bitrates[rx_status->rate_idx].bitrate;
|
||
rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
|
||
} else if (local && local->ops && local->ops->get_tsf)
|
||
/* second best option: get current TSF */
|
||
rx_timestamp = local->ops->get_tsf(local_to_hw(local));
|
||
else
|
||
/* can't merge without knowing the TSF */
|
||
rx_timestamp = -1LLU;
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG "RX beacon SA=%s BSSID="
|
||
"%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
|
||
print_mac(mac, mgmt->sa),
|
||
print_mac(mac2, mgmt->bssid),
|
||
(unsigned long long)rx_timestamp,
|
||
(unsigned long long)beacon_timestamp,
|
||
(unsigned long long)(rx_timestamp - beacon_timestamp),
|
||
jiffies);
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
if (beacon_timestamp > rx_timestamp) {
|
||
#ifndef CONFIG_MAC80211_IBSS_DEBUG
|
||
if (net_ratelimit())
|
||
#endif
|
||
printk(KERN_DEBUG "%s: beacon TSF higher than "
|
||
"local TSF - IBSS merge with BSSID %s\n",
|
||
dev->name, print_mac(mac, mgmt->bssid));
|
||
ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
|
||
ieee80211_ibss_add_sta(dev, NULL,
|
||
mgmt->bssid, mgmt->sa);
|
||
}
|
||
}
|
||
|
||
ieee80211_rx_bss_put(dev, bss);
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len,
|
||
struct ieee80211_rx_status *rx_status)
|
||
{
|
||
ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len,
|
||
struct ieee80211_rx_status *rx_status)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata;
|
||
struct ieee80211_if_sta *ifsta;
|
||
size_t baselen;
|
||
struct ieee802_11_elems elems;
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_conf *conf = &local->hw.conf;
|
||
u32 changed = 0;
|
||
|
||
ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
|
||
|
||
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
|
||
return;
|
||
ifsta = &sdata->u.sta;
|
||
|
||
if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
|
||
memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
|
||
return;
|
||
|
||
/* Process beacon from the current BSS */
|
||
baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
|
||
if (baselen > len)
|
||
return;
|
||
|
||
ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
|
||
|
||
if (elems.erp_info && elems.erp_info_len >= 1)
|
||
changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
|
||
|
||
if (elems.ht_cap_elem && elems.ht_info_elem &&
|
||
elems.wmm_param && local->ops->conf_ht &&
|
||
conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
|
||
struct ieee80211_ht_bss_info bss_info;
|
||
|
||
ieee80211_ht_addt_info_ie_to_ht_bss_info(
|
||
(struct ieee80211_ht_addt_info *)
|
||
elems.ht_info_elem, &bss_info);
|
||
/* check if AP changed bss inforamation */
|
||
if ((conf->ht_bss_conf.primary_channel !=
|
||
bss_info.primary_channel) ||
|
||
(conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
|
||
(conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
|
||
ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
|
||
&bss_info);
|
||
}
|
||
|
||
if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
|
||
ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
|
||
elems.wmm_param_len);
|
||
}
|
||
|
||
ieee80211_bss_info_change_notify(sdata, changed);
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len,
|
||
struct ieee80211_rx_status *rx_status)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
int tx_last_beacon;
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *resp;
|
||
u8 *pos, *end;
|
||
DECLARE_MAC_BUF(mac);
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
DECLARE_MAC_BUF(mac2);
|
||
DECLARE_MAC_BUF(mac3);
|
||
#endif
|
||
|
||
if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
|
||
ifsta->state != IEEE80211_IBSS_JOINED ||
|
||
len < 24 + 2 || !ifsta->probe_resp)
|
||
return;
|
||
|
||
if (local->ops->tx_last_beacon)
|
||
tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
|
||
else
|
||
tx_last_beacon = 1;
|
||
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
|
||
"%s (tx_last_beacon=%d)\n",
|
||
dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
|
||
print_mac(mac3, mgmt->bssid), tx_last_beacon);
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
|
||
if (!tx_last_beacon)
|
||
return;
|
||
|
||
if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
|
||
memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
|
||
return;
|
||
|
||
end = ((u8 *) mgmt) + len;
|
||
pos = mgmt->u.probe_req.variable;
|
||
if (pos[0] != WLAN_EID_SSID ||
|
||
pos + 2 + pos[1] > end) {
|
||
if (net_ratelimit()) {
|
||
printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
|
||
"from %s\n",
|
||
dev->name, print_mac(mac, mgmt->sa));
|
||
}
|
||
return;
|
||
}
|
||
if (pos[1] != 0 &&
|
||
(pos[1] != ifsta->ssid_len ||
|
||
memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
|
||
/* Ignore ProbeReq for foreign SSID */
|
||
return;
|
||
}
|
||
|
||
/* Reply with ProbeResp */
|
||
skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
|
||
if (!skb)
|
||
return;
|
||
|
||
resp = (struct ieee80211_mgmt *) skb->data;
|
||
memcpy(resp->da, mgmt->sa, ETH_ALEN);
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
|
||
dev->name, print_mac(mac, resp->da));
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
ieee80211_sta_tx(dev, skb, 0);
|
||
}
|
||
|
||
static void ieee80211_rx_mgmt_action(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len,
|
||
struct ieee80211_rx_status *rx_status)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
|
||
if (len < IEEE80211_MIN_ACTION_SIZE)
|
||
return;
|
||
|
||
switch (mgmt->u.action.category) {
|
||
case WLAN_CATEGORY_BACK:
|
||
switch (mgmt->u.action.u.addba_req.action_code) {
|
||
case WLAN_ACTION_ADDBA_REQ:
|
||
if (len < (IEEE80211_MIN_ACTION_SIZE +
|
||
sizeof(mgmt->u.action.u.addba_req)))
|
||
break;
|
||
ieee80211_sta_process_addba_request(dev, mgmt, len);
|
||
break;
|
||
case WLAN_ACTION_ADDBA_RESP:
|
||
if (len < (IEEE80211_MIN_ACTION_SIZE +
|
||
sizeof(mgmt->u.action.u.addba_resp)))
|
||
break;
|
||
ieee80211_sta_process_addba_resp(dev, mgmt, len);
|
||
break;
|
||
case WLAN_ACTION_DELBA:
|
||
if (len < (IEEE80211_MIN_ACTION_SIZE +
|
||
sizeof(mgmt->u.action.u.delba)))
|
||
break;
|
||
ieee80211_sta_process_delba(dev, mgmt, len);
|
||
break;
|
||
default:
|
||
if (net_ratelimit())
|
||
printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
|
||
dev->name);
|
||
break;
|
||
}
|
||
break;
|
||
case PLINK_CATEGORY:
|
||
if (ieee80211_vif_is_mesh(&sdata->vif))
|
||
mesh_rx_plink_frame(dev, mgmt, len, rx_status);
|
||
break;
|
||
case MESH_PATH_SEL_CATEGORY:
|
||
if (ieee80211_vif_is_mesh(&sdata->vif))
|
||
mesh_rx_path_sel_frame(dev, mgmt, len);
|
||
break;
|
||
default:
|
||
if (net_ratelimit())
|
||
printk(KERN_DEBUG "%s: Rx unknown action frame - "
|
||
"category=%d\n", dev->name, mgmt->u.action.category);
|
||
break;
|
||
}
|
||
}
|
||
|
||
void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
|
||
struct ieee80211_rx_status *rx_status)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sub_if_data *sdata;
|
||
struct ieee80211_if_sta *ifsta;
|
||
struct ieee80211_mgmt *mgmt;
|
||
u16 fc;
|
||
|
||
if (skb->len < 24)
|
||
goto fail;
|
||
|
||
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
ifsta = &sdata->u.sta;
|
||
|
||
mgmt = (struct ieee80211_mgmt *) skb->data;
|
||
fc = le16_to_cpu(mgmt->frame_control);
|
||
|
||
switch (fc & IEEE80211_FCTL_STYPE) {
|
||
case IEEE80211_STYPE_PROBE_REQ:
|
||
case IEEE80211_STYPE_PROBE_RESP:
|
||
case IEEE80211_STYPE_BEACON:
|
||
case IEEE80211_STYPE_ACTION:
|
||
memcpy(skb->cb, rx_status, sizeof(*rx_status));
|
||
case IEEE80211_STYPE_AUTH:
|
||
case IEEE80211_STYPE_ASSOC_RESP:
|
||
case IEEE80211_STYPE_REASSOC_RESP:
|
||
case IEEE80211_STYPE_DEAUTH:
|
||
case IEEE80211_STYPE_DISASSOC:
|
||
skb_queue_tail(&ifsta->skb_queue, skb);
|
||
queue_work(local->hw.workqueue, &ifsta->work);
|
||
return;
|
||
default:
|
||
printk(KERN_DEBUG "%s: received unknown management frame - "
|
||
"stype=%d\n", dev->name,
|
||
(fc & IEEE80211_FCTL_STYPE) >> 4);
|
||
break;
|
||
}
|
||
|
||
fail:
|
||
kfree_skb(skb);
|
||
}
|
||
|
||
|
||
static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
|
||
struct sk_buff *skb)
|
||
{
|
||
struct ieee80211_rx_status *rx_status;
|
||
struct ieee80211_sub_if_data *sdata;
|
||
struct ieee80211_if_sta *ifsta;
|
||
struct ieee80211_mgmt *mgmt;
|
||
u16 fc;
|
||
|
||
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
ifsta = &sdata->u.sta;
|
||
|
||
rx_status = (struct ieee80211_rx_status *) skb->cb;
|
||
mgmt = (struct ieee80211_mgmt *) skb->data;
|
||
fc = le16_to_cpu(mgmt->frame_control);
|
||
|
||
switch (fc & IEEE80211_FCTL_STYPE) {
|
||
case IEEE80211_STYPE_PROBE_REQ:
|
||
ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
|
||
rx_status);
|
||
break;
|
||
case IEEE80211_STYPE_PROBE_RESP:
|
||
ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
|
||
break;
|
||
case IEEE80211_STYPE_BEACON:
|
||
ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
|
||
break;
|
||
case IEEE80211_STYPE_AUTH:
|
||
ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
|
||
break;
|
||
case IEEE80211_STYPE_ASSOC_RESP:
|
||
ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
|
||
break;
|
||
case IEEE80211_STYPE_REASSOC_RESP:
|
||
ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
|
||
break;
|
||
case IEEE80211_STYPE_DEAUTH:
|
||
ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
|
||
break;
|
||
case IEEE80211_STYPE_DISASSOC:
|
||
ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
|
||
break;
|
||
case IEEE80211_STYPE_ACTION:
|
||
ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
|
||
break;
|
||
}
|
||
|
||
kfree_skb(skb);
|
||
}
|
||
|
||
|
||
ieee80211_rx_result
|
||
ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
|
||
struct ieee80211_rx_status *rx_status)
|
||
{
|
||
struct ieee80211_mgmt *mgmt;
|
||
u16 fc;
|
||
|
||
if (skb->len < 2)
|
||
return RX_DROP_UNUSABLE;
|
||
|
||
mgmt = (struct ieee80211_mgmt *) skb->data;
|
||
fc = le16_to_cpu(mgmt->frame_control);
|
||
|
||
if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
|
||
return RX_CONTINUE;
|
||
|
||
if (skb->len < 24)
|
||
return RX_DROP_MONITOR;
|
||
|
||
if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
|
||
if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
|
||
ieee80211_rx_mgmt_probe_resp(dev, mgmt,
|
||
skb->len, rx_status);
|
||
dev_kfree_skb(skb);
|
||
return RX_QUEUED;
|
||
} else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
|
||
ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
|
||
rx_status);
|
||
dev_kfree_skb(skb);
|
||
return RX_QUEUED;
|
||
}
|
||
}
|
||
return RX_CONTINUE;
|
||
}
|
||
|
||
|
||
static int ieee80211_sta_active_ibss(struct net_device *dev)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
int active = 0;
|
||
struct sta_info *sta;
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
|
||
rcu_read_lock();
|
||
|
||
list_for_each_entry_rcu(sta, &local->sta_list, list) {
|
||
if (sta->sdata == sdata &&
|
||
time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
|
||
jiffies)) {
|
||
active++;
|
||
break;
|
||
}
|
||
}
|
||
|
||
rcu_read_unlock();
|
||
|
||
return active;
|
||
}
|
||
|
||
|
||
static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct sta_info *sta, *tmp;
|
||
LIST_HEAD(tmp_list);
|
||
DECLARE_MAC_BUF(mac);
|
||
unsigned long flags;
|
||
|
||
spin_lock_irqsave(&local->sta_lock, flags);
|
||
list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
|
||
if (time_after(jiffies, sta->last_rx + exp_time)) {
|
||
printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
|
||
dev->name, print_mac(mac, sta->addr));
|
||
sta_info_unlink(&sta);
|
||
if (sta)
|
||
list_add(&sta->list, &tmp_list);
|
||
}
|
||
spin_unlock_irqrestore(&local->sta_lock, flags);
|
||
|
||
synchronize_rcu();
|
||
|
||
rtnl_lock();
|
||
list_for_each_entry_safe(sta, tmp, &tmp_list, list)
|
||
sta_info_destroy(sta);
|
||
rtnl_unlock();
|
||
}
|
||
|
||
|
||
static void ieee80211_sta_merge_ibss(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
|
||
|
||
ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
|
||
if (ieee80211_sta_active_ibss(dev))
|
||
return;
|
||
|
||
printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
|
||
"IBSS networks with same SSID (merge)\n", dev->name);
|
||
ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
|
||
}
|
||
|
||
|
||
#ifdef CONFIG_MAC80211_MESH
|
||
static void ieee80211_mesh_housekeeping(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
bool free_plinks;
|
||
|
||
ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
|
||
mesh_path_expire(dev);
|
||
|
||
free_plinks = mesh_plink_availables(sdata);
|
||
if (free_plinks != sdata->u.sta.accepting_plinks)
|
||
ieee80211_if_config_beacon(dev);
|
||
|
||
mod_timer(&ifsta->timer, jiffies +
|
||
IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
|
||
}
|
||
|
||
|
||
void ieee80211_start_mesh(struct net_device *dev)
|
||
{
|
||
struct ieee80211_if_sta *ifsta;
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
ifsta = &sdata->u.sta;
|
||
ifsta->state = IEEE80211_MESH_UP;
|
||
ieee80211_sta_timer((unsigned long)sdata);
|
||
}
|
||
#endif
|
||
|
||
|
||
void ieee80211_sta_timer(unsigned long data)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata =
|
||
(struct ieee80211_sub_if_data *) data;
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
struct ieee80211_local *local = wdev_priv(&sdata->wdev);
|
||
|
||
set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
|
||
queue_work(local->hw.workqueue, &ifsta->work);
|
||
}
|
||
|
||
void ieee80211_sta_work(struct work_struct *work)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata =
|
||
container_of(work, struct ieee80211_sub_if_data, u.sta.work);
|
||
struct net_device *dev = sdata->dev;
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_if_sta *ifsta;
|
||
struct sk_buff *skb;
|
||
|
||
if (!netif_running(dev))
|
||
return;
|
||
|
||
if (local->sta_sw_scanning || local->sta_hw_scanning)
|
||
return;
|
||
|
||
if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
|
||
sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
|
||
sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
|
||
printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
|
||
"(type=%d)\n", dev->name, sdata->vif.type);
|
||
return;
|
||
}
|
||
ifsta = &sdata->u.sta;
|
||
|
||
while ((skb = skb_dequeue(&ifsta->skb_queue)))
|
||
ieee80211_sta_rx_queued_mgmt(dev, skb);
|
||
|
||
#ifdef CONFIG_MAC80211_MESH
|
||
if (ifsta->preq_queue_len &&
|
||
time_after(jiffies,
|
||
ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
|
||
mesh_path_start_discovery(dev);
|
||
#endif
|
||
|
||
if (ifsta->state != IEEE80211_AUTHENTICATE &&
|
||
ifsta->state != IEEE80211_ASSOCIATE &&
|
||
test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
|
||
if (ifsta->scan_ssid_len)
|
||
ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
|
||
else
|
||
ieee80211_sta_start_scan(dev, NULL, 0);
|
||
return;
|
||
}
|
||
|
||
if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
|
||
if (ieee80211_sta_config_auth(dev, ifsta))
|
||
return;
|
||
clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
|
||
} else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
|
||
return;
|
||
|
||
switch (ifsta->state) {
|
||
case IEEE80211_DISABLED:
|
||
break;
|
||
case IEEE80211_AUTHENTICATE:
|
||
ieee80211_authenticate(dev, ifsta);
|
||
break;
|
||
case IEEE80211_ASSOCIATE:
|
||
ieee80211_associate(dev, ifsta);
|
||
break;
|
||
case IEEE80211_ASSOCIATED:
|
||
ieee80211_associated(dev, ifsta);
|
||
break;
|
||
case IEEE80211_IBSS_SEARCH:
|
||
ieee80211_sta_find_ibss(dev, ifsta);
|
||
break;
|
||
case IEEE80211_IBSS_JOINED:
|
||
ieee80211_sta_merge_ibss(dev, ifsta);
|
||
break;
|
||
#ifdef CONFIG_MAC80211_MESH
|
||
case IEEE80211_MESH_UP:
|
||
ieee80211_mesh_housekeeping(dev, ifsta);
|
||
break;
|
||
#endif
|
||
default:
|
||
printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
|
||
ifsta->state);
|
||
break;
|
||
}
|
||
|
||
if (ieee80211_privacy_mismatch(dev, ifsta)) {
|
||
printk(KERN_DEBUG "%s: privacy configuration mismatch and "
|
||
"mixed-cell disabled - disassociate\n", dev->name);
|
||
|
||
ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
|
||
ieee80211_set_disassoc(dev, ifsta, 0);
|
||
}
|
||
}
|
||
|
||
|
||
static void ieee80211_sta_reset_auth(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
|
||
if (local->ops->reset_tsf) {
|
||
/* Reset own TSF to allow time synchronization work. */
|
||
local->ops->reset_tsf(local_to_hw(local));
|
||
}
|
||
|
||
ifsta->wmm_last_param_set = -1; /* allow any WMM update */
|
||
|
||
|
||
if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
|
||
ifsta->auth_alg = WLAN_AUTH_OPEN;
|
||
else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
|
||
ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
|
||
else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
|
||
ifsta->auth_alg = WLAN_AUTH_LEAP;
|
||
else
|
||
ifsta->auth_alg = WLAN_AUTH_OPEN;
|
||
printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
|
||
ifsta->auth_alg);
|
||
ifsta->auth_transaction = -1;
|
||
ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
|
||
ifsta->auth_tries = ifsta->assoc_tries = 0;
|
||
netif_carrier_off(dev);
|
||
}
|
||
|
||
|
||
void ieee80211_sta_req_auth(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
|
||
if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
|
||
return;
|
||
|
||
if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
|
||
IEEE80211_STA_AUTO_BSSID_SEL)) &&
|
||
(ifsta->flags & (IEEE80211_STA_SSID_SET |
|
||
IEEE80211_STA_AUTO_SSID_SEL))) {
|
||
set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
|
||
queue_work(local->hw.workqueue, &ifsta->work);
|
||
}
|
||
}
|
||
|
||
static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
|
||
const char *ssid, int ssid_len)
|
||
{
|
||
int tmp, hidden_ssid;
|
||
|
||
if (ssid_len == ifsta->ssid_len &&
|
||
!memcmp(ifsta->ssid, ssid, ssid_len))
|
||
return 1;
|
||
|
||
if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
|
||
return 0;
|
||
|
||
hidden_ssid = 1;
|
||
tmp = ssid_len;
|
||
while (tmp--) {
|
||
if (ssid[tmp] != '\0') {
|
||
hidden_ssid = 0;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (hidden_ssid && ifsta->ssid_len == ssid_len)
|
||
return 1;
|
||
|
||
if (ssid_len == 1 && ssid[0] == ' ')
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int ieee80211_sta_config_auth(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_sta_bss *bss, *selected = NULL;
|
||
int top_rssi = 0, freq;
|
||
|
||
if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
|
||
IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
|
||
ifsta->state = IEEE80211_AUTHENTICATE;
|
||
ieee80211_sta_reset_auth(dev, ifsta);
|
||
return 0;
|
||
}
|
||
|
||
spin_lock_bh(&local->sta_bss_lock);
|
||
freq = local->oper_channel->center_freq;
|
||
list_for_each_entry(bss, &local->sta_bss_list, list) {
|
||
if (!(bss->capability & WLAN_CAPABILITY_ESS))
|
||
continue;
|
||
|
||
if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
|
||
!!sdata->default_key)
|
||
continue;
|
||
|
||
if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
|
||
bss->freq != freq)
|
||
continue;
|
||
|
||
if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
|
||
memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
|
||
continue;
|
||
|
||
if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
|
||
!ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
|
||
continue;
|
||
|
||
if (!selected || top_rssi < bss->rssi) {
|
||
selected = bss;
|
||
top_rssi = bss->rssi;
|
||
}
|
||
}
|
||
if (selected)
|
||
atomic_inc(&selected->users);
|
||
spin_unlock_bh(&local->sta_bss_lock);
|
||
|
||
if (selected) {
|
||
ieee80211_set_freq(local, selected->freq);
|
||
if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
|
||
ieee80211_sta_set_ssid(dev, selected->ssid,
|
||
selected->ssid_len);
|
||
ieee80211_sta_set_bssid(dev, selected->bssid);
|
||
ieee80211_sta_def_wmm_params(dev, selected, 0);
|
||
ieee80211_rx_bss_put(dev, selected);
|
||
ifsta->state = IEEE80211_AUTHENTICATE;
|
||
ieee80211_sta_reset_auth(dev, ifsta);
|
||
return 0;
|
||
} else {
|
||
if (ifsta->state != IEEE80211_AUTHENTICATE) {
|
||
if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
|
||
ieee80211_sta_start_scan(dev, NULL, 0);
|
||
else
|
||
ieee80211_sta_start_scan(dev, ifsta->ssid,
|
||
ifsta->ssid_len);
|
||
ifsta->state = IEEE80211_AUTHENTICATE;
|
||
set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
|
||
} else
|
||
ifsta->state = IEEE80211_DISABLED;
|
||
}
|
||
return -1;
|
||
}
|
||
|
||
|
||
static int ieee80211_sta_create_ibss(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sta_bss *bss;
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_supported_band *sband;
|
||
u8 bssid[ETH_ALEN], *pos;
|
||
int i;
|
||
DECLARE_MAC_BUF(mac);
|
||
|
||
#if 0
|
||
/* Easier testing, use fixed BSSID. */
|
||
memset(bssid, 0xfe, ETH_ALEN);
|
||
#else
|
||
/* Generate random, not broadcast, locally administered BSSID. Mix in
|
||
* own MAC address to make sure that devices that do not have proper
|
||
* random number generator get different BSSID. */
|
||
get_random_bytes(bssid, ETH_ALEN);
|
||
for (i = 0; i < ETH_ALEN; i++)
|
||
bssid[i] ^= dev->dev_addr[i];
|
||
bssid[0] &= ~0x01;
|
||
bssid[0] |= 0x02;
|
||
#endif
|
||
|
||
printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
|
||
dev->name, print_mac(mac, bssid));
|
||
|
||
bss = ieee80211_rx_bss_add(dev, bssid,
|
||
local->hw.conf.channel->center_freq,
|
||
sdata->u.sta.ssid, sdata->u.sta.ssid_len);
|
||
if (!bss)
|
||
return -ENOMEM;
|
||
|
||
bss->band = local->hw.conf.channel->band;
|
||
sband = local->hw.wiphy->bands[bss->band];
|
||
|
||
if (local->hw.conf.beacon_int == 0)
|
||
local->hw.conf.beacon_int = 10000;
|
||
bss->beacon_int = local->hw.conf.beacon_int;
|
||
bss->last_update = jiffies;
|
||
bss->capability = WLAN_CAPABILITY_IBSS;
|
||
if (sdata->default_key) {
|
||
bss->capability |= WLAN_CAPABILITY_PRIVACY;
|
||
} else
|
||
sdata->drop_unencrypted = 0;
|
||
bss->supp_rates_len = sband->n_bitrates;
|
||
pos = bss->supp_rates;
|
||
for (i = 0; i < sband->n_bitrates; i++) {
|
||
int rate = sband->bitrates[i].bitrate;
|
||
*pos++ = (u8) (rate / 5);
|
||
}
|
||
|
||
return ieee80211_sta_join_ibss(dev, ifsta, bss);
|
||
}
|
||
|
||
|
||
static int ieee80211_sta_find_ibss(struct net_device *dev,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sta_bss *bss;
|
||
int found = 0;
|
||
u8 bssid[ETH_ALEN];
|
||
int active_ibss;
|
||
DECLARE_MAC_BUF(mac);
|
||
DECLARE_MAC_BUF(mac2);
|
||
|
||
if (ifsta->ssid_len == 0)
|
||
return -EINVAL;
|
||
|
||
active_ibss = ieee80211_sta_active_ibss(dev);
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
|
||
dev->name, active_ibss);
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
spin_lock_bh(&local->sta_bss_lock);
|
||
list_for_each_entry(bss, &local->sta_bss_list, list) {
|
||
if (ifsta->ssid_len != bss->ssid_len ||
|
||
memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
|
||
|| !(bss->capability & WLAN_CAPABILITY_IBSS))
|
||
continue;
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG " bssid=%s found\n",
|
||
print_mac(mac, bss->bssid));
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
memcpy(bssid, bss->bssid, ETH_ALEN);
|
||
found = 1;
|
||
if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
|
||
break;
|
||
}
|
||
spin_unlock_bh(&local->sta_bss_lock);
|
||
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG " sta_find_ibss: selected %s current "
|
||
"%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
|
||
(bss = ieee80211_rx_bss_get(dev, bssid,
|
||
local->hw.conf.channel->center_freq,
|
||
ifsta->ssid, ifsta->ssid_len))) {
|
||
printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
|
||
" based on configured SSID\n",
|
||
dev->name, print_mac(mac, bssid));
|
||
return ieee80211_sta_join_ibss(dev, ifsta, bss);
|
||
}
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG " did not try to join ibss\n");
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
|
||
/* Selected IBSS not found in current scan results - try to scan */
|
||
if (ifsta->state == IEEE80211_IBSS_JOINED &&
|
||
!ieee80211_sta_active_ibss(dev)) {
|
||
mod_timer(&ifsta->timer, jiffies +
|
||
IEEE80211_IBSS_MERGE_INTERVAL);
|
||
} else if (time_after(jiffies, local->last_scan_completed +
|
||
IEEE80211_SCAN_INTERVAL)) {
|
||
printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
|
||
"join\n", dev->name);
|
||
return ieee80211_sta_req_scan(dev, ifsta->ssid,
|
||
ifsta->ssid_len);
|
||
} else if (ifsta->state != IEEE80211_IBSS_JOINED) {
|
||
int interval = IEEE80211_SCAN_INTERVAL;
|
||
|
||
if (time_after(jiffies, ifsta->ibss_join_req +
|
||
IEEE80211_IBSS_JOIN_TIMEOUT)) {
|
||
if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
|
||
(!(local->oper_channel->flags &
|
||
IEEE80211_CHAN_NO_IBSS)))
|
||
return ieee80211_sta_create_ibss(dev, ifsta);
|
||
if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
|
||
printk(KERN_DEBUG "%s: IBSS not allowed on"
|
||
" %d MHz\n", dev->name,
|
||
local->hw.conf.channel->center_freq);
|
||
}
|
||
|
||
/* No IBSS found - decrease scan interval and continue
|
||
* scanning. */
|
||
interval = IEEE80211_SCAN_INTERVAL_SLOW;
|
||
}
|
||
|
||
ifsta->state = IEEE80211_IBSS_SEARCH;
|
||
mod_timer(&ifsta->timer, jiffies + interval);
|
||
return 0;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_if_sta *ifsta;
|
||
|
||
if (len > IEEE80211_MAX_SSID_LEN)
|
||
return -EINVAL;
|
||
|
||
ifsta = &sdata->u.sta;
|
||
|
||
if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
|
||
ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
|
||
memcpy(ifsta->ssid, ssid, len);
|
||
memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
|
||
ifsta->ssid_len = len;
|
||
|
||
if (len)
|
||
ifsta->flags |= IEEE80211_STA_SSID_SET;
|
||
else
|
||
ifsta->flags &= ~IEEE80211_STA_SSID_SET;
|
||
if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
|
||
!(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
|
||
ifsta->ibss_join_req = jiffies;
|
||
ifsta->state = IEEE80211_IBSS_SEARCH;
|
||
return ieee80211_sta_find_ibss(dev, ifsta);
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
|
||
int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
|
||
*len = ifsta->ssid_len;
|
||
return 0;
|
||
}
|
||
|
||
|
||
int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata;
|
||
struct ieee80211_if_sta *ifsta;
|
||
int res;
|
||
|
||
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
ifsta = &sdata->u.sta;
|
||
|
||
if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
|
||
memcpy(ifsta->bssid, bssid, ETH_ALEN);
|
||
res = ieee80211_if_config(dev);
|
||
if (res) {
|
||
printk(KERN_DEBUG "%s: Failed to config new BSSID to "
|
||
"the low-level driver\n", dev->name);
|
||
return res;
|
||
}
|
||
}
|
||
|
||
if (is_valid_ether_addr(bssid))
|
||
ifsta->flags |= IEEE80211_STA_BSSID_SET;
|
||
else
|
||
ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
static void ieee80211_send_nullfunc(struct ieee80211_local *local,
|
||
struct ieee80211_sub_if_data *sdata,
|
||
int powersave)
|
||
{
|
||
struct sk_buff *skb;
|
||
struct ieee80211_hdr *nullfunc;
|
||
u16 fc;
|
||
|
||
skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
|
||
if (!skb) {
|
||
printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
|
||
"frame\n", sdata->dev->name);
|
||
return;
|
||
}
|
||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||
|
||
nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
|
||
memset(nullfunc, 0, 24);
|
||
fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
|
||
IEEE80211_FCTL_TODS;
|
||
if (powersave)
|
||
fc |= IEEE80211_FCTL_PM;
|
||
nullfunc->frame_control = cpu_to_le16(fc);
|
||
memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
|
||
memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
|
||
memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
|
||
|
||
ieee80211_sta_tx(sdata->dev, skb, 0);
|
||
}
|
||
|
||
|
||
static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
|
||
{
|
||
if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
|
||
ieee80211_vif_is_mesh(&sdata->vif))
|
||
ieee80211_sta_timer((unsigned long)sdata);
|
||
}
|
||
|
||
void ieee80211_scan_completed(struct ieee80211_hw *hw)
|
||
{
|
||
struct ieee80211_local *local = hw_to_local(hw);
|
||
struct net_device *dev = local->scan_dev;
|
||
struct ieee80211_sub_if_data *sdata;
|
||
union iwreq_data wrqu;
|
||
|
||
local->last_scan_completed = jiffies;
|
||
memset(&wrqu, 0, sizeof(wrqu));
|
||
wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
|
||
|
||
if (local->sta_hw_scanning) {
|
||
local->sta_hw_scanning = 0;
|
||
if (ieee80211_hw_config(local))
|
||
printk(KERN_DEBUG "%s: failed to restore operational "
|
||
"channel after scan\n", dev->name);
|
||
/* Restart STA timer for HW scan case */
|
||
rcu_read_lock();
|
||
list_for_each_entry_rcu(sdata, &local->interfaces, list)
|
||
ieee80211_restart_sta_timer(sdata);
|
||
rcu_read_unlock();
|
||
|
||
goto done;
|
||
}
|
||
|
||
local->sta_sw_scanning = 0;
|
||
if (ieee80211_hw_config(local))
|
||
printk(KERN_DEBUG "%s: failed to restore operational "
|
||
"channel after scan\n", dev->name);
|
||
|
||
|
||
netif_tx_lock_bh(local->mdev);
|
||
local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
|
||
local->ops->configure_filter(local_to_hw(local),
|
||
FIF_BCN_PRBRESP_PROMISC,
|
||
&local->filter_flags,
|
||
local->mdev->mc_count,
|
||
local->mdev->mc_list);
|
||
|
||
netif_tx_unlock_bh(local->mdev);
|
||
|
||
rcu_read_lock();
|
||
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
||
|
||
/* No need to wake the master device. */
|
||
if (sdata->dev == local->mdev)
|
||
continue;
|
||
|
||
/* Tell AP we're back */
|
||
if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
|
||
sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
|
||
ieee80211_send_nullfunc(local, sdata, 0);
|
||
|
||
ieee80211_restart_sta_timer(sdata);
|
||
|
||
netif_wake_queue(sdata->dev);
|
||
}
|
||
rcu_read_unlock();
|
||
|
||
done:
|
||
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
|
||
(!ifsta->state == IEEE80211_IBSS_JOINED &&
|
||
!ieee80211_sta_active_ibss(dev)))
|
||
ieee80211_sta_find_ibss(dev, ifsta);
|
||
}
|
||
}
|
||
EXPORT_SYMBOL(ieee80211_scan_completed);
|
||
|
||
void ieee80211_sta_scan_work(struct work_struct *work)
|
||
{
|
||
struct ieee80211_local *local =
|
||
container_of(work, struct ieee80211_local, scan_work.work);
|
||
struct net_device *dev = local->scan_dev;
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_supported_band *sband;
|
||
struct ieee80211_channel *chan;
|
||
int skip;
|
||
unsigned long next_delay = 0;
|
||
|
||
if (!local->sta_sw_scanning)
|
||
return;
|
||
|
||
switch (local->scan_state) {
|
||
case SCAN_SET_CHANNEL:
|
||
/*
|
||
* Get current scan band. scan_band may be IEEE80211_NUM_BANDS
|
||
* after we successfully scanned the last channel of the last
|
||
* band (and the last band is supported by the hw)
|
||
*/
|
||
if (local->scan_band < IEEE80211_NUM_BANDS)
|
||
sband = local->hw.wiphy->bands[local->scan_band];
|
||
else
|
||
sband = NULL;
|
||
|
||
/*
|
||
* If we are at an unsupported band and have more bands
|
||
* left to scan, advance to the next supported one.
|
||
*/
|
||
while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
|
||
local->scan_band++;
|
||
sband = local->hw.wiphy->bands[local->scan_band];
|
||
local->scan_channel_idx = 0;
|
||
}
|
||
|
||
/* if no more bands/channels left, complete scan */
|
||
if (!sband || local->scan_channel_idx >= sband->n_channels) {
|
||
ieee80211_scan_completed(local_to_hw(local));
|
||
return;
|
||
}
|
||
skip = 0;
|
||
chan = &sband->channels[local->scan_channel_idx];
|
||
|
||
if (chan->flags & IEEE80211_CHAN_DISABLED ||
|
||
(sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
|
||
chan->flags & IEEE80211_CHAN_NO_IBSS))
|
||
skip = 1;
|
||
|
||
if (!skip) {
|
||
local->scan_channel = chan;
|
||
if (ieee80211_hw_config(local)) {
|
||
printk(KERN_DEBUG "%s: failed to set freq to "
|
||
"%d MHz for scan\n", dev->name,
|
||
chan->center_freq);
|
||
skip = 1;
|
||
}
|
||
}
|
||
|
||
/* advance state machine to next channel/band */
|
||
local->scan_channel_idx++;
|
||
if (local->scan_channel_idx >= sband->n_channels) {
|
||
/*
|
||
* scan_band may end up == IEEE80211_NUM_BANDS, but
|
||
* we'll catch that case above and complete the scan
|
||
* if that is the case.
|
||
*/
|
||
local->scan_band++;
|
||
local->scan_channel_idx = 0;
|
||
}
|
||
|
||
if (skip)
|
||
break;
|
||
|
||
next_delay = IEEE80211_PROBE_DELAY +
|
||
usecs_to_jiffies(local->hw.channel_change_time);
|
||
local->scan_state = SCAN_SEND_PROBE;
|
||
break;
|
||
case SCAN_SEND_PROBE:
|
||
next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
|
||
local->scan_state = SCAN_SET_CHANNEL;
|
||
|
||
if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
|
||
break;
|
||
ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
|
||
local->scan_ssid_len);
|
||
next_delay = IEEE80211_CHANNEL_TIME;
|
||
break;
|
||
}
|
||
|
||
if (local->sta_sw_scanning)
|
||
queue_delayed_work(local->hw.workqueue, &local->scan_work,
|
||
next_delay);
|
||
}
|
||
|
||
|
||
static int ieee80211_sta_start_scan(struct net_device *dev,
|
||
u8 *ssid, size_t ssid_len)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct ieee80211_sub_if_data *sdata;
|
||
|
||
if (ssid_len > IEEE80211_MAX_SSID_LEN)
|
||
return -EINVAL;
|
||
|
||
/* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
|
||
* BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
|
||
* BSSID: MACAddress
|
||
* SSID
|
||
* ScanType: ACTIVE, PASSIVE
|
||
* ProbeDelay: delay (in microseconds) to be used prior to transmitting
|
||
* a Probe frame during active scanning
|
||
* ChannelList
|
||
* MinChannelTime (>= ProbeDelay), in TU
|
||
* MaxChannelTime: (>= MinChannelTime), in TU
|
||
*/
|
||
|
||
/* MLME-SCAN.confirm
|
||
* BSSDescriptionSet
|
||
* ResultCode: SUCCESS, INVALID_PARAMETERS
|
||
*/
|
||
|
||
if (local->sta_sw_scanning || local->sta_hw_scanning) {
|
||
if (local->scan_dev == dev)
|
||
return 0;
|
||
return -EBUSY;
|
||
}
|
||
|
||
if (local->ops->hw_scan) {
|
||
int rc = local->ops->hw_scan(local_to_hw(local),
|
||
ssid, ssid_len);
|
||
if (!rc) {
|
||
local->sta_hw_scanning = 1;
|
||
local->scan_dev = dev;
|
||
}
|
||
return rc;
|
||
}
|
||
|
||
local->sta_sw_scanning = 1;
|
||
|
||
rcu_read_lock();
|
||
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
||
|
||
/* Don't stop the master interface, otherwise we can't transmit
|
||
* probes! */
|
||
if (sdata->dev == local->mdev)
|
||
continue;
|
||
|
||
netif_stop_queue(sdata->dev);
|
||
if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
|
||
(sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
|
||
ieee80211_send_nullfunc(local, sdata, 1);
|
||
}
|
||
rcu_read_unlock();
|
||
|
||
if (ssid) {
|
||
local->scan_ssid_len = ssid_len;
|
||
memcpy(local->scan_ssid, ssid, ssid_len);
|
||
} else
|
||
local->scan_ssid_len = 0;
|
||
local->scan_state = SCAN_SET_CHANNEL;
|
||
local->scan_channel_idx = 0;
|
||
local->scan_band = IEEE80211_BAND_2GHZ;
|
||
local->scan_dev = dev;
|
||
|
||
netif_tx_lock_bh(local->mdev);
|
||
local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
|
||
local->ops->configure_filter(local_to_hw(local),
|
||
FIF_BCN_PRBRESP_PROMISC,
|
||
&local->filter_flags,
|
||
local->mdev->mc_count,
|
||
local->mdev->mc_list);
|
||
netif_tx_unlock_bh(local->mdev);
|
||
|
||
/* TODO: start scan as soon as all nullfunc frames are ACKed */
|
||
queue_delayed_work(local->hw.workqueue, &local->scan_work,
|
||
IEEE80211_CHANNEL_TIME);
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
|
||
if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
|
||
return ieee80211_sta_start_scan(dev, ssid, ssid_len);
|
||
|
||
if (local->sta_sw_scanning || local->sta_hw_scanning) {
|
||
if (local->scan_dev == dev)
|
||
return 0;
|
||
return -EBUSY;
|
||
}
|
||
|
||
ifsta->scan_ssid_len = ssid_len;
|
||
if (ssid_len)
|
||
memcpy(ifsta->scan_ssid, ssid, ssid_len);
|
||
set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
|
||
queue_work(local->hw.workqueue, &ifsta->work);
|
||
return 0;
|
||
}
|
||
|
||
static char *
|
||
ieee80211_sta_scan_result(struct net_device *dev,
|
||
struct ieee80211_sta_bss *bss,
|
||
char *current_ev, char *end_buf)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct iw_event iwe;
|
||
|
||
if (time_after(jiffies,
|
||
bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
|
||
return current_ev;
|
||
|
||
memset(&iwe, 0, sizeof(iwe));
|
||
iwe.cmd = SIOCGIWAP;
|
||
iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
|
||
memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
|
||
current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
|
||
IW_EV_ADDR_LEN);
|
||
|
||
memset(&iwe, 0, sizeof(iwe));
|
||
iwe.cmd = SIOCGIWESSID;
|
||
if (bss_mesh_cfg(bss)) {
|
||
iwe.u.data.length = bss_mesh_id_len(bss);
|
||
iwe.u.data.flags = 1;
|
||
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
|
||
bss_mesh_id(bss));
|
||
} else {
|
||
iwe.u.data.length = bss->ssid_len;
|
||
iwe.u.data.flags = 1;
|
||
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
|
||
bss->ssid);
|
||
}
|
||
|
||
if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
|
||
|| bss_mesh_cfg(bss)) {
|
||
memset(&iwe, 0, sizeof(iwe));
|
||
iwe.cmd = SIOCGIWMODE;
|
||
if (bss_mesh_cfg(bss))
|
||
iwe.u.mode = IW_MODE_MESH;
|
||
else if (bss->capability & WLAN_CAPABILITY_ESS)
|
||
iwe.u.mode = IW_MODE_MASTER;
|
||
else
|
||
iwe.u.mode = IW_MODE_ADHOC;
|
||
current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
|
||
IW_EV_UINT_LEN);
|
||
}
|
||
|
||
memset(&iwe, 0, sizeof(iwe));
|
||
iwe.cmd = SIOCGIWFREQ;
|
||
iwe.u.freq.m = bss->freq;
|
||
iwe.u.freq.e = 6;
|
||
current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
|
||
IW_EV_FREQ_LEN);
|
||
|
||
memset(&iwe, 0, sizeof(iwe));
|
||
iwe.cmd = SIOCGIWFREQ;
|
||
iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
|
||
iwe.u.freq.e = 0;
|
||
current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
|
||
IW_EV_FREQ_LEN);
|
||
|
||
memset(&iwe, 0, sizeof(iwe));
|
||
iwe.cmd = IWEVQUAL;
|
||
iwe.u.qual.qual = bss->signal;
|
||
iwe.u.qual.level = bss->rssi;
|
||
iwe.u.qual.noise = bss->noise;
|
||
iwe.u.qual.updated = local->wstats_flags;
|
||
current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
|
||
IW_EV_QUAL_LEN);
|
||
|
||
memset(&iwe, 0, sizeof(iwe));
|
||
iwe.cmd = SIOCGIWENCODE;
|
||
if (bss->capability & WLAN_CAPABILITY_PRIVACY)
|
||
iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
|
||
else
|
||
iwe.u.data.flags = IW_ENCODE_DISABLED;
|
||
iwe.u.data.length = 0;
|
||
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
|
||
|
||
if (bss && bss->wpa_ie) {
|
||
memset(&iwe, 0, sizeof(iwe));
|
||
iwe.cmd = IWEVGENIE;
|
||
iwe.u.data.length = bss->wpa_ie_len;
|
||
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
|
||
bss->wpa_ie);
|
||
}
|
||
|
||
if (bss && bss->rsn_ie) {
|
||
memset(&iwe, 0, sizeof(iwe));
|
||
iwe.cmd = IWEVGENIE;
|
||
iwe.u.data.length = bss->rsn_ie_len;
|
||
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
|
||
bss->rsn_ie);
|
||
}
|
||
|
||
if (bss && bss->supp_rates_len > 0) {
|
||
/* display all supported rates in readable format */
|
||
char *p = current_ev + IW_EV_LCP_LEN;
|
||
int i;
|
||
|
||
memset(&iwe, 0, sizeof(iwe));
|
||
iwe.cmd = SIOCGIWRATE;
|
||
/* Those two flags are ignored... */
|
||
iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
|
||
|
||
for (i = 0; i < bss->supp_rates_len; i++) {
|
||
iwe.u.bitrate.value = ((bss->supp_rates[i] &
|
||
0x7f) * 500000);
|
||
p = iwe_stream_add_value(current_ev, p,
|
||
end_buf, &iwe, IW_EV_PARAM_LEN);
|
||
}
|
||
current_ev = p;
|
||
}
|
||
|
||
if (bss) {
|
||
char *buf;
|
||
buf = kmalloc(30, GFP_ATOMIC);
|
||
if (buf) {
|
||
memset(&iwe, 0, sizeof(iwe));
|
||
iwe.cmd = IWEVCUSTOM;
|
||
sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
|
||
iwe.u.data.length = strlen(buf);
|
||
current_ev = iwe_stream_add_point(current_ev, end_buf,
|
||
&iwe, buf);
|
||
kfree(buf);
|
||
}
|
||
}
|
||
|
||
if (bss_mesh_cfg(bss)) {
|
||
char *buf;
|
||
u8 *cfg = bss_mesh_cfg(bss);
|
||
buf = kmalloc(50, GFP_ATOMIC);
|
||
if (buf) {
|
||
memset(&iwe, 0, sizeof(iwe));
|
||
iwe.cmd = IWEVCUSTOM;
|
||
sprintf(buf, "Mesh network (version %d)", cfg[0]);
|
||
iwe.u.data.length = strlen(buf);
|
||
current_ev = iwe_stream_add_point(current_ev, end_buf,
|
||
&iwe, buf);
|
||
sprintf(buf, "Path Selection Protocol ID: "
|
||
"0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
|
||
cfg[4]);
|
||
iwe.u.data.length = strlen(buf);
|
||
current_ev = iwe_stream_add_point(current_ev, end_buf,
|
||
&iwe, buf);
|
||
sprintf(buf, "Path Selection Metric ID: "
|
||
"0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
|
||
cfg[8]);
|
||
iwe.u.data.length = strlen(buf);
|
||
current_ev = iwe_stream_add_point(current_ev, end_buf,
|
||
&iwe, buf);
|
||
sprintf(buf, "Congestion Control Mode ID: "
|
||
"0x%02X%02X%02X%02X", cfg[9], cfg[10],
|
||
cfg[11], cfg[12]);
|
||
iwe.u.data.length = strlen(buf);
|
||
current_ev = iwe_stream_add_point(current_ev, end_buf,
|
||
&iwe, buf);
|
||
sprintf(buf, "Channel Precedence: "
|
||
"0x%02X%02X%02X%02X", cfg[13], cfg[14],
|
||
cfg[15], cfg[16]);
|
||
iwe.u.data.length = strlen(buf);
|
||
current_ev = iwe_stream_add_point(current_ev, end_buf,
|
||
&iwe, buf);
|
||
kfree(buf);
|
||
}
|
||
}
|
||
|
||
return current_ev;
|
||
}
|
||
|
||
|
||
int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
char *current_ev = buf;
|
||
char *end_buf = buf + len;
|
||
struct ieee80211_sta_bss *bss;
|
||
|
||
spin_lock_bh(&local->sta_bss_lock);
|
||
list_for_each_entry(bss, &local->sta_bss_list, list) {
|
||
if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
|
||
spin_unlock_bh(&local->sta_bss_lock);
|
||
return -E2BIG;
|
||
}
|
||
current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
|
||
end_buf);
|
||
}
|
||
spin_unlock_bh(&local->sta_bss_lock);
|
||
return current_ev - buf;
|
||
}
|
||
|
||
|
||
int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
kfree(ifsta->extra_ie);
|
||
if (len == 0) {
|
||
ifsta->extra_ie = NULL;
|
||
ifsta->extra_ie_len = 0;
|
||
return 0;
|
||
}
|
||
ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
|
||
if (!ifsta->extra_ie) {
|
||
ifsta->extra_ie_len = 0;
|
||
return -ENOMEM;
|
||
}
|
||
memcpy(ifsta->extra_ie, ie, len);
|
||
ifsta->extra_ie_len = len;
|
||
return 0;
|
||
}
|
||
|
||
|
||
struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
|
||
struct sk_buff *skb, u8 *bssid,
|
||
u8 *addr)
|
||
{
|
||
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
||
struct sta_info *sta;
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
DECLARE_MAC_BUF(mac);
|
||
|
||
/* TODO: Could consider removing the least recently used entry and
|
||
* allow new one to be added. */
|
||
if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
|
||
if (net_ratelimit()) {
|
||
printk(KERN_DEBUG "%s: No room for a new IBSS STA "
|
||
"entry %s\n", dev->name, print_mac(mac, addr));
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
|
||
wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
|
||
|
||
sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
|
||
if (!sta)
|
||
return NULL;
|
||
|
||
sta->flags |= WLAN_STA_AUTHORIZED;
|
||
|
||
sta->supp_rates[local->hw.conf.channel->band] =
|
||
sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
|
||
|
||
rate_control_rate_init(sta, local);
|
||
|
||
if (sta_info_insert(sta)) {
|
||
sta_info_destroy(sta);
|
||
return NULL;
|
||
}
|
||
|
||
return sta;
|
||
}
|
||
|
||
|
||
int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
|
||
printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
|
||
dev->name, reason);
|
||
|
||
if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
|
||
sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
|
||
return -EINVAL;
|
||
|
||
ieee80211_send_deauth(dev, ifsta, reason);
|
||
ieee80211_set_disassoc(dev, ifsta, 1);
|
||
return 0;
|
||
}
|
||
|
||
|
||
int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
|
||
printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
|
||
dev->name, reason);
|
||
|
||
if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
|
||
return -EINVAL;
|
||
|
||
if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
|
||
return -1;
|
||
|
||
ieee80211_send_disassoc(dev, ifsta, reason);
|
||
ieee80211_set_disassoc(dev, ifsta, 0);
|
||
return 0;
|
||
}
|