![Joe Perches](/assets/img/avatar_default.png)
This is nicer than the MAC_FMT stuff. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
3157 lines
86 KiB
C
3157 lines
86 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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* BSS table: use <BSSID,SSID> as the key to support multi-SSID APs
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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 <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 "hostapd_ioctl.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_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_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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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);
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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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/* Parsed Information Elements */
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struct ieee802_11_elems {
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/* pointers to IEs */
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u8 *ssid;
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u8 *supp_rates;
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u8 *fh_params;
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u8 *ds_params;
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u8 *cf_params;
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u8 *tim;
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u8 *ibss_params;
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u8 *challenge;
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u8 *wpa;
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u8 *rsn;
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u8 *erp_info;
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u8 *ext_supp_rates;
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u8 *wmm_info;
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u8 *wmm_param;
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/* length of them, respectively */
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u8 ssid_len;
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u8 supp_rates_len;
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u8 fh_params_len;
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u8 ds_params_len;
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u8 cf_params_len;
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u8 tim_len;
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u8 ibss_params_len;
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u8 challenge_len;
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u8 wpa_len;
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u8 rsn_len;
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u8 erp_info_len;
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u8 ext_supp_rates_len;
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u8 wmm_info_len;
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u8 wmm_param_len;
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};
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typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
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static ParseRes 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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int unknown = 0;
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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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#if 0
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if (net_ratelimit())
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printk(KERN_DEBUG "IEEE 802.11 element parse "
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"failed (id=%d elen=%d left=%d)\n",
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id, elen, left);
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#endif
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return ParseFailed;
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}
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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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default:
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#if 0
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printk(KERN_DEBUG "IEEE 802.11 element parse ignored "
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"unknown element (id=%d elen=%d)\n",
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id, elen);
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#endif
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unknown++;
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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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/* Do not trigger error if left == 1 as Apple Airport base stations
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* send AssocResps that are one spurious byte too long. */
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return unknown ? ParseUnknown : ParseOK;
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}
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static int ecw2cw(int ecw)
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{
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int cw = 1;
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while (ecw > 0) {
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cw <<= 1;
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ecw--;
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}
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return cw - 1;
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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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memset(¶ms, 0, sizeof(params));
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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;
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int acm = (pos[0] >> 4) & 0x01;
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int queue;
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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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}
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break;
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case 2:
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queue = IEEE80211_TX_QUEUE_DATA1;
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if (acm) {
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local->wmm_acm |= BIT(4) | BIT(5);
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}
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break;
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case 3:
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queue = IEEE80211_TX_QUEUE_DATA0;
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if (acm) {
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local->wmm_acm |= BIT(6) | BIT(7);
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}
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break;
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case 0:
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default:
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queue = IEEE80211_TX_QUEUE_DATA2;
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if (acm) {
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local->wmm_acm |= BIT(1) | BIT(2);
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}
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break;
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}
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params.aifs = pos[0] & 0x0f;
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params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
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params.cw_min = ecw2cw(pos[1] & 0x0f);
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/* TXOP is in units of 32 usec; burst_time in 0.1 ms */
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params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
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printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
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"cWmin=%d cWmax=%d burst=%d\n",
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dev->name, queue, aci, acm, params.aifs, params.cw_min,
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params.cw_max, params.burst_time);
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/* TODO: handle ACM (block TX, fallback to next lowest allowed
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* AC for now) */
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if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
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printk(KERN_DEBUG "%s: failed to set TX queue "
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"parameters for queue %d\n", dev->name, queue);
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}
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}
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}
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static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
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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_if_sta *ifsta = &sdata->u.sta;
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int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
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int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
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u8 changes = 0;
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DECLARE_MAC_BUF(mac);
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if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) {
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if (net_ratelimit()) {
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printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
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"%s)\n",
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dev->name,
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use_protection ? "enabled" : "disabled",
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print_mac(mac, ifsta->bssid));
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}
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if (use_protection)
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sdata->flags |= IEEE80211_SDATA_USE_PROTECTION;
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else
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sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION;
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changes |= IEEE80211_ERP_CHANGE_PROTECTION;
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}
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if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) {
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if (net_ratelimit()) {
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printk(KERN_DEBUG "%s: switched to %s barker preamble"
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" (BSSID=%s)\n",
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dev->name,
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(preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
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"short" : "long",
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print_mac(mac, ifsta->bssid));
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}
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if (preamble_mode)
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sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE;
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else
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sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE;
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changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
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}
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if (changes)
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ieee80211_erp_info_change_notify(dev, changes);
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}
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static void ieee80211_sta_send_associnfo(struct net_device *dev,
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struct ieee80211_if_sta *ifsta)
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{
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char *buf;
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size_t len;
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int i;
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union iwreq_data wrqu;
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if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
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return;
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buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
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ifsta->assocresp_ies_len), GFP_KERNEL);
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if (!buf)
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return;
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len = sprintf(buf, "ASSOCINFO(");
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if (ifsta->assocreq_ies) {
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len += sprintf(buf + len, "ReqIEs=");
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for (i = 0; i < ifsta->assocreq_ies_len; i++) {
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len += sprintf(buf + len, "%02x",
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ifsta->assocreq_ies[i]);
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}
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}
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if (ifsta->assocresp_ies) {
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if (ifsta->assocreq_ies)
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len += sprintf(buf + len, " ");
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len += sprintf(buf + len, "RespIEs=");
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for (i = 0; i < ifsta->assocresp_ies_len; i++) {
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len += sprintf(buf + len, "%02x",
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ifsta->assocresp_ies[i]);
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}
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}
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len += sprintf(buf + len, ")");
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if (len > IW_CUSTOM_MAX) {
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len = sprintf(buf, "ASSOCRESPIE=");
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for (i = 0; i < ifsta->assocresp_ies_len; i++) {
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len += sprintf(buf + len, "%02x",
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ifsta->assocresp_ies[i]);
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}
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}
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memset(&wrqu, 0, sizeof(wrqu));
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wrqu.data.length = len;
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wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
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kfree(buf);
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}
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static void ieee80211_set_associated(struct net_device *dev,
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struct ieee80211_if_sta *ifsta,
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unsigned int assoc)
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{
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union iwreq_data wrqu;
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if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc)
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return;
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if (assoc) {
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struct ieee80211_sub_if_data *sdata;
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struct ieee80211_sta_bss *bss;
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ifsta->flags |= IEEE80211_STA_ASSOCIATED;
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sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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if (sdata->type != IEEE80211_IF_TYPE_STA)
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return;
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bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
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if (bss) {
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if (bss->has_erp_value)
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ieee80211_handle_erp_ie(dev, bss->erp_value);
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ieee80211_rx_bss_put(dev, bss);
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}
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netif_carrier_on(dev);
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ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
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memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
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memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
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ieee80211_sta_send_associnfo(dev, ifsta);
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} else {
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ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
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netif_carrier_off(dev);
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ieee80211_reset_erp_info(dev);
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memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
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}
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wrqu.ap_addr.sa_family = ARPHRD_ETHER;
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wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
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ifsta->last_probe = jiffies;
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}
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static void ieee80211_set_disassoc(struct net_device *dev,
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struct ieee80211_if_sta *ifsta, int deauth)
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{
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if (deauth)
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ifsta->auth_tries = 0;
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ifsta->assoc_tries = 0;
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ieee80211_set_associated(dev, ifsta, 0);
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}
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static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
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int encrypt)
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{
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struct ieee80211_sub_if_data *sdata;
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struct ieee80211_tx_packet_data *pkt_data;
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sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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skb->dev = sdata->local->mdev;
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skb_set_mac_header(skb, 0);
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skb_set_network_header(skb, 0);
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skb_set_transport_header(skb, 0);
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pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
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memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
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pkt_data->ifindex = sdata->dev->ifindex;
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if (sdata->type == IEEE80211_IF_TYPE_MGMT)
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|
pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
|
|
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 ieee80211_hw_mode *mode;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_mgmt *mgmt;
|
|
u8 *pos, *ies;
|
|
int i, len;
|
|
u16 capab;
|
|
struct ieee80211_sta_bss *bss;
|
|
int wmm = 0;
|
|
|
|
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);
|
|
|
|
mode = local->oper_hw_mode;
|
|
capab = ifsta->capab;
|
|
if (mode->mode == MODE_IEEE80211G) {
|
|
capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
|
|
WLAN_CAPABILITY_SHORT_PREAMBLE;
|
|
}
|
|
bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
|
|
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 = mode->num_rates;
|
|
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 = mode->rates[i].rate;
|
|
*pos++ = (u8) (rate / 5);
|
|
}
|
|
|
|
if (mode->num_rates > len) {
|
|
pos = skb_put(skb, mode->num_rates - len + 2);
|
|
*pos++ = WLAN_EID_EXT_SUPP_RATES;
|
|
*pos++ = mode->num_rates - len;
|
|
for (i = len; i < mode->num_rates; i++) {
|
|
int rate = mode->rates[i].rate;
|
|
*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;
|
|
}
|
|
|
|
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_sta_bss *bss;
|
|
int res = 0;
|
|
|
|
if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL) ||
|
|
ifsta->key_management_enabled)
|
|
return 0;
|
|
|
|
bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
|
|
if (!bss)
|
|
return 0;
|
|
|
|
if (ieee80211_sta_wep_configured(dev) !=
|
|
!!(bss->capability & WLAN_CAPABILITY_PRIVACY))
|
|
res = 1;
|
|
|
|
ieee80211_rx_bss_put(dev, bss);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
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;
|
|
|
|
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_free(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);
|
|
}
|
|
}
|
|
sta_info_put(sta);
|
|
}
|
|
if (disassoc) {
|
|
union iwreq_data wrqu;
|
|
memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
|
|
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
|
|
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
|
|
mod_timer(&ifsta->timer, jiffies +
|
|
IEEE80211_MONITORING_INTERVAL + 30 * HZ);
|
|
} 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_hw_mode *mode;
|
|
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;
|
|
mode = local->oper_hw_mode;
|
|
for (i = 0; i < mode->num_rates; i++) {
|
|
struct ieee80211_rate *rate = &mode->rates[i];
|
|
if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
|
|
continue;
|
|
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->rate / 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;
|
|
if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
|
|
== ParseFailed) {
|
|
printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n",
|
|
dev->name);
|
|
return;
|
|
}
|
|
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_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->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->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->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->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 net_device *dev,
|
|
struct ieee80211_if_sta *ifsta,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len,
|
|
int reassoc)
|
|
{
|
|
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
|
struct ieee80211_hw_mode *mode;
|
|
struct sta_info *sta;
|
|
u32 rates;
|
|
u16 capab_info, status_code, aid;
|
|
struct ieee802_11_elems elems;
|
|
u8 *pos;
|
|
int i, j;
|
|
DECLARE_MAC_BUF(mac);
|
|
|
|
/* 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);
|
|
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));
|
|
|
|
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, aid);
|
|
|
|
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;
|
|
}
|
|
|
|
pos = mgmt->u.assoc_resp.variable;
|
|
if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
|
|
== ParseFailed) {
|
|
printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
|
|
dev->name);
|
|
return;
|
|
}
|
|
|
|
if (!elems.supp_rates) {
|
|
printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
|
|
dev->name);
|
|
return;
|
|
}
|
|
|
|
/* it probably doesn't, but if the frame includes an ERP value then
|
|
* update our stored copy */
|
|
if (elems.erp_info && elems.erp_info_len >= 1) {
|
|
struct ieee80211_sta_bss *bss
|
|
= ieee80211_rx_bss_get(dev, ifsta->bssid);
|
|
if (bss) {
|
|
bss->erp_value = elems.erp_info[0];
|
|
bss->has_erp_value = 1;
|
|
ieee80211_rx_bss_put(dev, bss);
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
ieee80211_set_associated(dev, ifsta, 1);
|
|
|
|
/* Add STA entry for the AP */
|
|
sta = sta_info_get(local, ifsta->bssid);
|
|
if (!sta) {
|
|
struct ieee80211_sta_bss *bss;
|
|
sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
|
|
if (!sta) {
|
|
printk(KERN_DEBUG "%s: failed to add STA entry for the"
|
|
" AP\n", dev->name);
|
|
return;
|
|
}
|
|
bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
|
|
if (bss) {
|
|
sta->last_rssi = bss->rssi;
|
|
sta->last_signal = bss->signal;
|
|
sta->last_noise = bss->noise;
|
|
ieee80211_rx_bss_put(dev, bss);
|
|
}
|
|
}
|
|
|
|
sta->dev = dev;
|
|
sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
|
|
|
|
rates = 0;
|
|
mode = local->oper_hw_mode;
|
|
for (i = 0; i < elems.supp_rates_len; i++) {
|
|
int rate = (elems.supp_rates[i] & 0x7f) * 5;
|
|
for (j = 0; j < mode->num_rates; j++)
|
|
if (mode->rates[j].rate == rate)
|
|
rates |= BIT(j);
|
|
}
|
|
for (i = 0; i < elems.ext_supp_rates_len; i++) {
|
|
int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
|
|
for (j = 0; j < mode->num_rates; j++)
|
|
if (mode->rates[j].rate == rate)
|
|
rates |= BIT(j);
|
|
}
|
|
sta->supp_rates = rates;
|
|
|
|
rate_control_rate_init(sta, local);
|
|
|
|
if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
|
|
sta->flags |= WLAN_STA_WME;
|
|
ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
|
|
elems.wmm_param_len);
|
|
}
|
|
|
|
|
|
sta_info_put(sta);
|
|
|
|
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);
|
|
bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
|
|
local->sta_bss_hash[STA_HASH(bss->bssid)] = 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)
|
|
{
|
|
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);
|
|
|
|
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)
|
|
{
|
|
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 (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
|
|
atomic_inc(&bss->users);
|
|
break;
|
|
}
|
|
bss = bss->hnext;
|
|
}
|
|
spin_unlock_bh(&local->sta_bss_lock);
|
|
return bss;
|
|
}
|
|
|
|
|
|
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);
|
|
}
|
|
|
|
|
|
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 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 channel, invalid = 0, clen;
|
|
struct ieee80211_sta_bss *bss;
|
|
struct sta_info *sta;
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
u64 timestamp;
|
|
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;
|
|
|
|
timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
|
|
|
|
if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
|
|
memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
|
|
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
|
static unsigned long last_tsf_debug = 0;
|
|
u64 tsf;
|
|
if (local->ops->get_tsf)
|
|
tsf = local->ops->get_tsf(local_to_hw(local));
|
|
else
|
|
tsf = -1LLU;
|
|
if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
|
|
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)tsf,
|
|
(unsigned long long)timestamp,
|
|
(unsigned long long)(tsf - timestamp),
|
|
jiffies);
|
|
last_tsf_debug = jiffies;
|
|
}
|
|
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
|
}
|
|
|
|
if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
|
|
&elems) == ParseFailed)
|
|
invalid = 1;
|
|
|
|
if (sdata->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))) {
|
|
struct ieee80211_hw_mode *mode;
|
|
struct ieee80211_rate *rates;
|
|
size_t num_rates;
|
|
u32 supp_rates, prev_rates;
|
|
int i, j;
|
|
|
|
mode = local->sta_scanning ?
|
|
local->scan_hw_mode : local->oper_hw_mode;
|
|
rates = mode->rates;
|
|
num_rates = mode->num_rates;
|
|
|
|
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 (rates[j].rate == own_rate)
|
|
supp_rates |= BIT(j);
|
|
}
|
|
|
|
prev_rates = sta->supp_rates;
|
|
sta->supp_rates &= supp_rates;
|
|
if (sta->supp_rates == 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 = sdata->u.sta.supp_rates_bits;
|
|
}
|
|
if (sta->supp_rates != prev_rates) {
|
|
printk(KERN_DEBUG "%s: updated supp_rates set for "
|
|
"%s based on beacon info (0x%x & 0x%x -> "
|
|
"0x%x)\n",
|
|
dev->name, print_mac(mac, sta->addr), prev_rates,
|
|
supp_rates, sta->supp_rates);
|
|
}
|
|
sta_info_put(sta);
|
|
}
|
|
|
|
if (!elems.ssid)
|
|
return;
|
|
|
|
if (elems.ds_params && elems.ds_params_len == 1)
|
|
channel = elems.ds_params[0];
|
|
else
|
|
channel = rx_status->channel;
|
|
|
|
bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
|
|
if (!bss) {
|
|
bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
|
|
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
|
|
}
|
|
|
|
if (bss->probe_resp && beacon) {
|
|
/* 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);
|
|
if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
|
|
memcpy(bss->ssid, elems.ssid, elems.ssid_len);
|
|
bss->ssid_len = elems.ssid_len;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
|
|
bss->hw_mode = rx_status->phymode;
|
|
bss->channel = channel;
|
|
bss->freq = rx_status->freq;
|
|
if (channel != rx_status->channel &&
|
|
(bss->hw_mode == MODE_IEEE80211G ||
|
|
bss->hw_mode == MODE_IEEE80211B) &&
|
|
channel >= 1 && channel <= 14) {
|
|
static const int freq_list[] = {
|
|
2412, 2417, 2422, 2427, 2432, 2437, 2442,
|
|
2447, 2452, 2457, 2462, 2467, 2472, 2484
|
|
};
|
|
/* IEEE 802.11g/b mode can receive packets from neighboring
|
|
* channels, so map the channel into frequency. */
|
|
bss->freq = freq_list[channel - 1];
|
|
}
|
|
bss->timestamp = 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++;
|
|
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;
|
|
|
|
ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
|
|
|
|
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
if (sdata->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;
|
|
|
|
if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
|
|
&elems) == ParseFailed)
|
|
return;
|
|
|
|
if (elems.erp_info && elems.erp_info_len >= 1)
|
|
ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
|
|
|
|
if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
|
|
ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
|
|
elems.wmm_param_len);
|
|
}
|
|
}
|
|
|
|
|
|
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->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);
|
|
}
|
|
|
|
|
|
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:
|
|
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(dev, ifsta, mgmt, skb->len, 0);
|
|
break;
|
|
case IEEE80211_STYPE_REASSOC_RESP:
|
|
ieee80211_rx_mgmt_assoc_resp(dev, 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;
|
|
}
|
|
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
|
|
void 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 < 24) {
|
|
dev_kfree_skb(skb);
|
|
return;
|
|
}
|
|
|
|
mgmt = (struct ieee80211_mgmt *) skb->data;
|
|
fc = le16_to_cpu(mgmt->frame_control);
|
|
|
|
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);
|
|
} else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
|
|
ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
|
|
rx_status);
|
|
}
|
|
}
|
|
|
|
dev_kfree_skb(skb);
|
|
}
|
|
|
|
|
|
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;
|
|
|
|
read_lock_bh(&local->sta_lock);
|
|
list_for_each_entry(sta, &local->sta_list, list) {
|
|
if (sta->dev == dev &&
|
|
time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
|
|
jiffies)) {
|
|
active++;
|
|
break;
|
|
}
|
|
}
|
|
read_unlock_bh(&local->sta_lock);
|
|
|
|
return active;
|
|
}
|
|
|
|
|
|
static void ieee80211_sta_expire(struct net_device *dev)
|
|
{
|
|
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
|
struct sta_info *sta, *tmp;
|
|
LIST_HEAD(tmp_list);
|
|
DECLARE_MAC_BUF(mac);
|
|
|
|
write_lock_bh(&local->sta_lock);
|
|
list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
|
|
if (time_after(jiffies, sta->last_rx +
|
|
IEEE80211_IBSS_INACTIVITY_LIMIT)) {
|
|
printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
|
|
dev->name, print_mac(mac, sta->addr));
|
|
__sta_info_get(sta);
|
|
sta_info_remove(sta);
|
|
list_add(&sta->list, &tmp_list);
|
|
}
|
|
write_unlock_bh(&local->sta_lock);
|
|
|
|
list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
|
|
sta_info_free(sta);
|
|
sta_info_put(sta);
|
|
}
|
|
}
|
|
|
|
|
|
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);
|
|
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);
|
|
}
|
|
|
|
|
|
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_scanning)
|
|
return;
|
|
|
|
if (sdata->type != IEEE80211_IF_TYPE_STA &&
|
|
sdata->type != IEEE80211_IF_TYPE_IBSS) {
|
|
printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
|
|
"(type=%d)\n", dev->name, sdata->type);
|
|
return;
|
|
}
|
|
ifsta = &sdata->u.sta;
|
|
|
|
while ((skb = skb_dequeue(&ifsta->skb_queue)))
|
|
ieee80211_sta_rx_queued_mgmt(dev, skb);
|
|
|
|
if (ifsta->state != IEEE80211_AUTHENTICATE &&
|
|
ifsta->state != IEEE80211_ASSOCIATE &&
|
|
test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
|
|
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;
|
|
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->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 (!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->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_channel(local, -1, 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_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_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 ieee80211_rate *rate;
|
|
struct ieee80211_hw_mode *mode;
|
|
struct rate_control_extra extra;
|
|
u8 *pos;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
/* 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_channel(local, -1, bss->freq);
|
|
|
|
if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
|
|
printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
|
|
"(%d MHz)\n", dev->name, local->hw.conf.channel,
|
|
local->hw.conf.freq);
|
|
return -1;
|
|
}
|
|
|
|
/* Set beacon template based on scan results */
|
|
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);
|
|
|
|
pos = skb_put(skb, 2 + 1);
|
|
*pos++ = WLAN_EID_DS_PARAMS;
|
|
*pos++ = 1;
|
|
*pos++ = bss->channel;
|
|
|
|
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));
|
|
memset(&extra, 0, sizeof(extra));
|
|
extra.mode = local->oper_hw_mode;
|
|
rate = rate_control_get_rate(local, dev, skb, &extra);
|
|
if (!rate) {
|
|
printk(KERN_DEBUG "%s: Failed to determine TX rate "
|
|
"for IBSS beacon\n", dev->name);
|
|
break;
|
|
}
|
|
control.tx_rate =
|
|
((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) &&
|
|
(rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
|
|
rate->val2 : rate->val;
|
|
control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
|
|
control.power_level = local->hw.conf.power_level;
|
|
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 based on scan results\n", dev->name);
|
|
skb = NULL;
|
|
}
|
|
|
|
rates = 0;
|
|
mode = local->oper_hw_mode;
|
|
for (i = 0; i < bss->supp_rates_len; i++) {
|
|
int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
|
|
for (j = 0; j < mode->num_rates; j++)
|
|
if (mode->rates[j].rate == bitrate)
|
|
rates |= BIT(j);
|
|
}
|
|
ifsta->supp_rates_bits = rates;
|
|
} 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;
|
|
}
|
|
|
|
|
|
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;
|
|
struct ieee80211_hw_mode *mode;
|
|
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);
|
|
if (!bss)
|
|
return -ENOMEM;
|
|
|
|
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
mode = local->oper_hw_mode;
|
|
|
|
if (local->hw.conf.beacon_int == 0)
|
|
local->hw.conf.beacon_int = 100;
|
|
bss->beacon_int = local->hw.conf.beacon_int;
|
|
bss->hw_mode = local->hw.conf.phymode;
|
|
bss->channel = local->hw.conf.channel;
|
|
bss->freq = local->hw.conf.freq;
|
|
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 = mode->num_rates;
|
|
pos = bss->supp_rates;
|
|
for (i = 0; i < mode->num_rates; i++) {
|
|
int rate = mode->rates[i].rate;
|
|
*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))) {
|
|
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->flag & IEEE80211_CHAN_W_IBSS)
|
|
return ieee80211_sta_create_ibss(dev, ifsta);
|
|
if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
|
|
printk(KERN_DEBUG "%s: IBSS not allowed on the"
|
|
" configured channel %d (%d MHz)\n",
|
|
dev->name, local->hw.conf.channel,
|
|
local->hw.conf.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;
|
|
struct ieee80211_if_sta *ifsta;
|
|
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
|
|
|
|
if (len > IEEE80211_MAX_SSID_LEN)
|
|
return -EINVAL;
|
|
|
|
/* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
|
|
* not defined. */
|
|
if (local->ops->conf_tx) {
|
|
struct ieee80211_tx_queue_params qparam;
|
|
int i;
|
|
|
|
memset(&qparam, 0, sizeof(qparam));
|
|
/* TODO: are these ok defaults for all hw_modes? */
|
|
qparam.aifs = 2;
|
|
qparam.cw_min =
|
|
local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
|
|
qparam.cw_max = 1023;
|
|
qparam.burst_time = 0;
|
|
for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
|
|
{
|
|
local->ops->conf_tx(local_to_hw(local),
|
|
i + IEEE80211_TX_QUEUE_DATA0,
|
|
&qparam);
|
|
}
|
|
/* IBSS uses different parameters for Beacon sending */
|
|
qparam.cw_min++;
|
|
qparam.cw_min *= 2;
|
|
qparam.cw_min--;
|
|
local->ops->conf_tx(local_to_hw(local),
|
|
IEEE80211_TX_QUEUE_BEACON, &qparam);
|
|
}
|
|
|
|
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
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->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);
|
|
}
|
|
|
|
|
|
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;
|
|
wmb();
|
|
local->sta_scanning = 0;
|
|
|
|
if (ieee80211_hw_config(local))
|
|
printk(KERN_DEBUG "%s: failed to restore operational"
|
|
"channel after scan\n", dev->name);
|
|
|
|
if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
|
|
ieee80211_if_config(dev))
|
|
printk(KERN_DEBUG "%s: failed to restore operational"
|
|
"BSSID after scan\n", dev->name);
|
|
|
|
memset(&wrqu, 0, sizeof(wrqu));
|
|
wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
|
|
|
|
read_lock(&local->sub_if_lock);
|
|
list_for_each_entry(sdata, &local->sub_if_list, list) {
|
|
|
|
/* No need to wake the master device. */
|
|
if (sdata->dev == local->mdev)
|
|
continue;
|
|
|
|
if (sdata->type == IEEE80211_IF_TYPE_STA) {
|
|
if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
|
|
ieee80211_send_nullfunc(local, sdata, 0);
|
|
ieee80211_sta_timer((unsigned long)sdata);
|
|
}
|
|
|
|
netif_wake_queue(sdata->dev);
|
|
}
|
|
read_unlock(&local->sub_if_lock);
|
|
|
|
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
if (sdata->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_hw_mode *mode;
|
|
struct ieee80211_channel *chan;
|
|
int skip;
|
|
unsigned long next_delay = 0;
|
|
|
|
if (!local->sta_scanning)
|
|
return;
|
|
|
|
switch (local->scan_state) {
|
|
case SCAN_SET_CHANNEL:
|
|
mode = local->scan_hw_mode;
|
|
if (local->scan_hw_mode->list.next == &local->modes_list &&
|
|
local->scan_channel_idx >= mode->num_channels) {
|
|
ieee80211_scan_completed(local_to_hw(local));
|
|
return;
|
|
}
|
|
skip = !(local->enabled_modes & (1 << mode->mode));
|
|
chan = &mode->channels[local->scan_channel_idx];
|
|
if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
|
|
(sdata->type == IEEE80211_IF_TYPE_IBSS &&
|
|
!(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
|
|
(local->hw_modes & local->enabled_modes &
|
|
(1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
|
|
skip = 1;
|
|
|
|
if (!skip) {
|
|
#if 0
|
|
printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
|
|
dev->name, chan->chan, chan->freq);
|
|
#endif
|
|
|
|
local->scan_channel = chan;
|
|
if (ieee80211_hw_config(local)) {
|
|
printk(KERN_DEBUG "%s: failed to set channel "
|
|
"%d (%d MHz) for scan\n", dev->name,
|
|
chan->chan, chan->freq);
|
|
skip = 1;
|
|
}
|
|
}
|
|
|
|
local->scan_channel_idx++;
|
|
if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
|
|
if (local->scan_hw_mode->list.next != &local->modes_list) {
|
|
local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
|
|
struct ieee80211_hw_mode,
|
|
list);
|
|
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:
|
|
if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
|
|
ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
|
|
local->scan_ssid_len);
|
|
next_delay = IEEE80211_CHANNEL_TIME;
|
|
} else
|
|
next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
|
|
local->scan_state = SCAN_SET_CHANNEL;
|
|
break;
|
|
}
|
|
|
|
if (local->sta_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_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_scanning = 1;
|
|
local->scan_dev = dev;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
local->sta_scanning = 1;
|
|
|
|
read_lock(&local->sub_if_lock);
|
|
list_for_each_entry(sdata, &local->sub_if_list, 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->type == IEEE80211_IF_TYPE_STA &&
|
|
(sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
|
|
ieee80211_send_nullfunc(local, sdata, 1);
|
|
}
|
|
read_unlock(&local->sub_if_lock);
|
|
|
|
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_hw_mode = list_entry(local->modes_list.next,
|
|
struct ieee80211_hw_mode,
|
|
list);
|
|
local->scan_channel_idx = 0;
|
|
local->scan_dev = dev;
|
|
|
|
if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
|
|
ieee80211_if_config(dev))
|
|
printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
|
|
dev->name);
|
|
|
|
/* 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->type != IEEE80211_IF_TYPE_STA)
|
|
return ieee80211_sta_start_scan(dev, ssid, ssid_len);
|
|
|
|
if (local->sta_scanning) {
|
|
if (local->scan_dev == dev)
|
|
return 0;
|
|
return -EBUSY;
|
|
}
|
|
|
|
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;
|
|
|
|
if (!(local->enabled_modes & (1 << bss->hw_mode)))
|
|
return current_ev;
|
|
|
|
if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
|
|
!bss->wpa_ie && !bss->rsn_ie)
|
|
return current_ev;
|
|
|
|
if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
|
|
(local->scan_ssid_len != bss->ssid_len ||
|
|
memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
|
|
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;
|
|
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)) {
|
|
memset(&iwe, 0, sizeof(iwe));
|
|
iwe.cmd = SIOCGIWMODE;
|
|
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->channel;
|
|
iwe.u.freq.e = 0;
|
|
current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
|
|
IW_EV_FREQ_LEN);
|
|
iwe.u.freq.m = bss->freq * 100000;
|
|
iwe.u.freq.e = 1;
|
|
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);
|
|
}
|
|
}
|
|
|
|
do {
|
|
char *buf;
|
|
|
|
if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
|
|
break;
|
|
|
|
buf = kmalloc(100, GFP_ATOMIC);
|
|
if (!buf)
|
|
break;
|
|
|
|
memset(&iwe, 0, sizeof(iwe));
|
|
iwe.cmd = IWEVCUSTOM;
|
|
sprintf(buf, "bcn_int=%d", bss->beacon_int);
|
|
iwe.u.data.length = strlen(buf);
|
|
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
|
|
buf);
|
|
|
|
memset(&iwe, 0, sizeof(iwe));
|
|
iwe.cmd = IWEVCUSTOM;
|
|
sprintf(buf, "capab=0x%04x", bss->capability);
|
|
iwe.u.data.length = strlen(buf);
|
|
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
|
|
buf);
|
|
|
|
kfree(buf);
|
|
break;
|
|
} while (0);
|
|
|
|
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",
|
|
local->mdev->name, print_mac(mac, addr), dev->name);
|
|
|
|
sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
|
|
if (!sta)
|
|
return NULL;
|
|
|
|
sta->supp_rates = sdata->u.sta.supp_rates_bits;
|
|
|
|
rate_control_rate_init(sta, local);
|
|
|
|
return sta; /* caller will call sta_info_put() */
|
|
}
|
|
|
|
|
|
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->type != IEEE80211_IF_TYPE_STA &&
|
|
sdata->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->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;
|
|
}
|