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hostapd/wpa_supplicant/mlme.c

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/*
* WPA Supplicant - Client mode MLME
* Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
* Copyright (c) 2004, Instant802 Networks, Inc.
* Copyright (c) 2005-2006, Devicescape Software, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#include "common.h"
#include "eloop.h"
#include "config_ssid.h"
#include "wpa_supplicant_i.h"
#include "wpa.h"
#include "drivers/driver.h"
#include "ieee802_11_defs.h"
#include "mlme.h"
/* Timeouts and intervals in milliseconds */
#define IEEE80211_AUTH_TIMEOUT (200)
#define IEEE80211_AUTH_MAX_TRIES 3
#define IEEE80211_ASSOC_TIMEOUT (200)
#define IEEE80211_ASSOC_MAX_TRIES 3
#define IEEE80211_MONITORING_INTERVAL (2000)
#define IEEE80211_PROBE_INTERVAL (60000)
#define IEEE80211_RETRY_AUTH_INTERVAL (1000)
#define IEEE80211_SCAN_INTERVAL (2000)
#define IEEE80211_SCAN_INTERVAL_SLOW (15000)
#define IEEE80211_IBSS_JOIN_TIMEOUT (20000)
#define IEEE80211_PROBE_DELAY (33)
#define IEEE80211_CHANNEL_TIME (33)
#define IEEE80211_PASSIVE_CHANNEL_TIME (200)
#define IEEE80211_SCAN_RESULT_EXPIRE (10000)
#define IEEE80211_IBSS_MERGE_INTERVAL (30000)
#define IEEE80211_IBSS_INACTIVITY_LIMIT (60000)
#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
#define IEEE80211_FC(type, stype) host_to_le16((type << 2) | (stype << 4))
struct ieee80211_sta_bss {
struct ieee80211_sta_bss *next;
struct ieee80211_sta_bss *hnext;
u8 bssid[ETH_ALEN];
u8 ssid[MAX_SSID_LEN];
size_t ssid_len;
u16 capability; /* host byte order */
int hw_mode;
int channel;
int freq;
int rssi;
u8 *ie;
size_t ie_len;
u8 *wpa_ie;
size_t wpa_ie_len;
u8 *rsn_ie;
size_t rsn_ie_len;
u8 *wmm_ie;
size_t wmm_ie_len;
u8 *mdie;
size_t mdie_len;
#define IEEE80211_MAX_SUPP_RATES 32
u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
size_t supp_rates_len;
int beacon_int;
u64 timestamp;
int probe_resp;
struct os_time last_update;
};
static void ieee80211_send_probe_req(struct wpa_supplicant *wpa_s,
const u8 *dst,
const u8 *ssid, size_t ssid_len);
static struct ieee80211_sta_bss *
ieee80211_bss_get(struct wpa_supplicant *wpa_s, const u8 *bssid);
static int ieee80211_sta_find_ibss(struct wpa_supplicant *wpa_s);
static int ieee80211_sta_wep_configured(struct wpa_supplicant *wpa_s);
static void ieee80211_sta_timer(void *eloop_ctx, void *timeout_ctx);
static void ieee80211_sta_scan_timer(void *eloop_ctx, void *timeout_ctx);
/* Parsed Information Elements */
struct ieee802_11_elems {
u8 *ssid;
u8 ssid_len;
u8 *supp_rates;
u8 supp_rates_len;
u8 *fh_params;
u8 fh_params_len;
u8 *ds_params;
u8 ds_params_len;
u8 *cf_params;
u8 cf_params_len;
u8 *tim;
u8 tim_len;
u8 *ibss_params;
u8 ibss_params_len;
u8 *challenge;
u8 challenge_len;
u8 *wpa;
u8 wpa_len;
u8 *rsn;
u8 rsn_len;
u8 *erp_info;
u8 erp_info_len;
u8 *ext_supp_rates;
u8 ext_supp_rates_len;
u8 *wmm_info;
u8 wmm_info_len;
u8 *wmm_param;
u8 wmm_param_len;
u8 *mdie;
u8 mdie_len;
u8 *ftie;
u8 ftie_len;
u8 *assoc_comeback;
u8 assoc_comeback_len;
};
typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
static ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
struct ieee802_11_elems *elems)
{
size_t left = len;
u8 *pos = start;
int unknown = 0;
os_memset(elems, 0, sizeof(*elems));
while (left >= 2) {
u8 id, elen;
id = *pos++;
elen = *pos++;
left -= 2;
if (elen > left) {
#if 0
wpa_printf(MSG_MSGDUMP, "MLME: IEEE 802.11 element "
"parse failed (id=%d elen=%d left=%d)",
id, elen, left);
#endif
return ParseFailed;
}
switch (id) {
case WLAN_EID_SSID:
elems->ssid = pos;
elems->ssid_len = elen;
break;
case WLAN_EID_SUPP_RATES:
elems->supp_rates = pos;
elems->supp_rates_len = elen;
break;
case WLAN_EID_FH_PARAMS:
elems->fh_params = pos;
elems->fh_params_len = elen;
break;
case WLAN_EID_DS_PARAMS:
elems->ds_params = pos;
elems->ds_params_len = elen;
break;
case WLAN_EID_CF_PARAMS:
elems->cf_params = pos;
elems->cf_params_len = elen;
break;
case WLAN_EID_TIM:
elems->tim = pos;
elems->tim_len = elen;
break;
case WLAN_EID_IBSS_PARAMS:
elems->ibss_params = pos;
elems->ibss_params_len = elen;
break;
case WLAN_EID_CHALLENGE:
elems->challenge = pos;
elems->challenge_len = elen;
break;
case WLAN_EID_VENDOR_SPECIFIC:
if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
pos[2] == 0xf2) {
/* Microsoft OUI (00:50:F2) */
if (pos[3] == 1) {
/* OUI Type 1 - WPA IE */
elems->wpa = pos;
elems->wpa_len = elen;
} else if (elen >= 5 && pos[3] == 2) {
if (pos[4] == 0) {
elems->wmm_info = pos;
elems->wmm_info_len = elen;
} else if (pos[4] == 1) {
elems->wmm_param = pos;
elems->wmm_param_len = elen;
}
}
}
break;
case WLAN_EID_RSN:
elems->rsn = pos;
elems->rsn_len = elen;
break;
case WLAN_EID_ERP_INFO:
elems->erp_info = pos;
elems->erp_info_len = elen;
break;
case WLAN_EID_EXT_SUPP_RATES:
elems->ext_supp_rates = pos;
elems->ext_supp_rates_len = elen;
break;
case WLAN_EID_MOBILITY_DOMAIN:
elems->mdie = pos;
elems->mdie_len = elen;
break;
case WLAN_EID_FAST_BSS_TRANSITION:
elems->ftie = pos;
elems->ftie_len = elen;
break;
case WLAN_EID_ASSOC_COMEBACK_TIME:
elems->assoc_comeback = pos;
elems->assoc_comeback_len = elen;
break;
default:
#if 0
wpa_printf(MSG_MSGDUMP "MLME: IEEE 802.11 element "
"parse ignored unknown element (id=%d "
"elen=%d)", id, elen);
#endif
unknown++;
break;
}
left -= elen;
pos += elen;
}
if (left)
return ParseFailed;
return unknown ? ParseUnknown : ParseOK;
}
static int ieee80211_sta_set_channel(struct wpa_supplicant *wpa_s,
wpa_hw_mode phymode, int chan,
int freq)
{
size_t i;
struct wpa_hw_modes *mode;
for (i = 0; i < wpa_s->mlme.num_modes; i++) {
mode = &wpa_s->mlme.modes[i];
if (mode->mode == phymode) {
wpa_s->mlme.curr_rates = mode->rates;
wpa_s->mlme.num_curr_rates = mode->num_rates;
break;
}
}
return wpa_drv_set_channel(wpa_s, phymode, chan, freq);
}
#if 0 /* FIX */
static int ecw2cw(int ecw)
{
int cw = 1;
while (ecw > 0) {
cw <<= 1;
ecw--;
}
return cw - 1;
}
#endif
static void ieee80211_sta_wmm_params(struct wpa_supplicant *wpa_s,
u8 *wmm_param, size_t wmm_param_len)
{
size_t left;
int count;
u8 *pos;
if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
return;
count = wmm_param[6] & 0x0f;
if (count == wpa_s->mlme.wmm_last_param_set)
return;
wpa_s->mlme.wmm_last_param_set = count;
pos = wmm_param + 8;
left = wmm_param_len - 8;
#if 0 /* FIX */
wmm_acm = 0;
for (; left >= 4; left -= 4, pos += 4) {
int aci = (pos[0] >> 5) & 0x03;
int acm = (pos[0] >> 4) & 0x01;
int queue;
switch (aci) {
case 1:
queue = IEEE80211_TX_QUEUE_DATA3;
if (acm)
wmm_acm |= BIT(1) | BIT(2);
break;
case 2:
queue = IEEE80211_TX_QUEUE_DATA1;
if (acm)
wmm_acm |= BIT(4) | BIT(5);
break;
case 3:
queue = IEEE80211_TX_QUEUE_DATA0;
if (acm)
wmm_acm |= BIT(6) | BIT(7);
break;
case 0:
default:
queue = IEEE80211_TX_QUEUE_DATA2;
if (acm)
wpa_s->mlme.wmm_acm |= BIT(0) | BIT(3);
break;
}
params.aifs = pos[0] & 0x0f;
params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
params.cw_min = ecw2cw(pos[1] & 0x0f);
/* TXOP is in units of 32 usec; burst_time in 0.1 ms */
params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
wpa_printf(MSG_DEBUG, "MLME: WMM queue=%d aci=%d acm=%d "
"aifs=%d cWmin=%d cWmax=%d burst=%d",
queue, aci, acm, params.aifs, params.cw_min,
params.cw_max, params.burst_time);
/* TODO: handle ACM (block TX, fallback to next lowest allowed
* AC for now) */
if (local->hw->conf_tx(local->mdev, queue, &params)) {
wpa_printf(MSG_DEBUG, "MLME: failed to set TX queue "
"parameters for queue %d", queue);
}
}
#endif
}
static void ieee80211_set_associated(struct wpa_supplicant *wpa_s, int assoc)
{
if (wpa_s->mlme.associated == assoc && !assoc)
return;
wpa_s->mlme.associated = assoc;
if (assoc) {
union wpa_event_data data;
os_memset(&data, 0, sizeof(data));
wpa_s->mlme.prev_bssid_set = 1;
os_memcpy(wpa_s->mlme.prev_bssid, wpa_s->bssid, ETH_ALEN);
data.assoc_info.req_ies = wpa_s->mlme.assocreq_ies;
data.assoc_info.req_ies_len = wpa_s->mlme.assocreq_ies_len;
data.assoc_info.resp_ies = wpa_s->mlme.assocresp_ies;
data.assoc_info.resp_ies_len = wpa_s->mlme.assocresp_ies_len;
wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data);
} else {
wpa_supplicant_event(wpa_s, EVENT_DISASSOC, NULL);
}
os_get_time(&wpa_s->mlme.last_probe);
}
static int ieee80211_sta_tx(struct wpa_supplicant *wpa_s, const u8 *buf,
size_t len)
{
return wpa_drv_send_mlme(wpa_s, buf, len);
}
static void ieee80211_send_auth(struct wpa_supplicant *wpa_s,
int transaction, u8 *extra, size_t extra_len,
int encrypt)
{
u8 *buf;
size_t len;
struct ieee80211_mgmt *mgmt;
buf = os_malloc(sizeof(*mgmt) + 6 + extra_len);
if (buf == NULL) {
wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
"auth frame");
return;
}
mgmt = (struct ieee80211_mgmt *) buf;
len = 24 + 6;
os_memset(mgmt, 0, 24 + 6);
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_AUTH);
if (encrypt)
mgmt->frame_control |= host_to_le16(WLAN_FC_ISWEP);
os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
mgmt->u.auth.auth_alg = host_to_le16(wpa_s->mlme.auth_alg);
mgmt->u.auth.auth_transaction = host_to_le16(transaction);
wpa_s->mlme.auth_transaction = transaction + 1;
mgmt->u.auth.status_code = host_to_le16(0);
if (extra) {
os_memcpy(buf + len, extra, extra_len);
len += extra_len;
}
ieee80211_sta_tx(wpa_s, buf, len);
os_free(buf);
}
static void ieee80211_reschedule_timer(struct wpa_supplicant *wpa_s, int ms)
{
eloop_cancel_timeout(ieee80211_sta_timer, wpa_s, NULL);
eloop_register_timeout(ms / 1000, 1000 * (ms % 1000),
ieee80211_sta_timer, wpa_s, NULL);
}
static void ieee80211_authenticate(struct wpa_supplicant *wpa_s)
{
u8 *extra;
size_t extra_len;
wpa_s->mlme.auth_tries++;
if (wpa_s->mlme.auth_tries > IEEE80211_AUTH_MAX_TRIES) {
wpa_printf(MSG_DEBUG, "MLME: authentication with AP " MACSTR
" timed out", MAC2STR(wpa_s->bssid));
return;
}
wpa_s->mlme.state = IEEE80211_AUTHENTICATE;
wpa_printf(MSG_DEBUG, "MLME: authenticate with AP " MACSTR,
MAC2STR(wpa_s->bssid));
extra = NULL;
extra_len = 0;
#ifdef CONFIG_IEEE80211R
if ((wpa_s->mlme.key_mgmt == KEY_MGMT_FT_802_1X ||
wpa_s->mlme.key_mgmt == KEY_MGMT_FT_PSK) &&
wpa_s->mlme.ft_ies) {
struct ieee80211_sta_bss *bss;
struct rsn_mdie *mdie = NULL;
bss = ieee80211_bss_get(wpa_s, wpa_s->bssid);
if (bss && bss->mdie_len >= 2 + sizeof(*mdie))
mdie = (struct rsn_mdie *) (bss->mdie + 2);
if (mdie &&
os_memcmp(mdie->mobility_domain, wpa_s->mlme.current_md,
MOBILITY_DOMAIN_ID_LEN) == 0) {
wpa_printf(MSG_DEBUG, "MLME: Trying to use FT "
"over-the-air");
wpa_s->mlme.auth_alg = WLAN_AUTH_FT;
extra = wpa_s->mlme.ft_ies;
extra_len = wpa_s->mlme.ft_ies_len;
}
}
#endif /* CONFIG_IEEE80211R */
ieee80211_send_auth(wpa_s, 1, extra, extra_len, 0);
ieee80211_reschedule_timer(wpa_s, IEEE80211_AUTH_TIMEOUT);
}
static void ieee80211_send_assoc(struct wpa_supplicant *wpa_s)
{
struct ieee80211_mgmt *mgmt;
u8 *pos, *ies, *buf;
int i, len;
u16 capab;
struct ieee80211_sta_bss *bss;
int wmm = 0;
size_t blen, buflen;
if (wpa_s->mlme.curr_rates == NULL) {
wpa_printf(MSG_DEBUG, "MLME: curr_rates not set for assoc");
return;
}
buflen = sizeof(*mgmt) + 200 + wpa_s->mlme.extra_ie_len +
wpa_s->mlme.ssid_len;
#ifdef CONFIG_IEEE80211R
if (wpa_s->mlme.ft_ies)
buflen += wpa_s->mlme.ft_ies_len;
#endif /* CONFIG_IEEE80211R */
buf = os_malloc(buflen);
if (buf == NULL) {
wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
"assoc frame");
return;
}
blen = 0;
capab = wpa_s->mlme.capab;
if (wpa_s->mlme.phymode == WPA_MODE_IEEE80211G) {
capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
WLAN_CAPABILITY_SHORT_PREAMBLE;
}
bss = ieee80211_bss_get(wpa_s, wpa_s->bssid);
if (bss) {
if (bss->capability & WLAN_CAPABILITY_PRIVACY)
capab |= WLAN_CAPABILITY_PRIVACY;
if (bss->wmm_ie) {
wmm = 1;
}
}
mgmt = (struct ieee80211_mgmt *) buf;
blen += 24;
os_memset(mgmt, 0, 24);
os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
if (wpa_s->mlme.prev_bssid_set) {
blen += 10;
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_REASSOC_REQ);
mgmt->u.reassoc_req.capab_info = host_to_le16(capab);
mgmt->u.reassoc_req.listen_interval = host_to_le16(1);
os_memcpy(mgmt->u.reassoc_req.current_ap,
wpa_s->mlme.prev_bssid,
ETH_ALEN);
} else {
blen += 4;
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_ASSOC_REQ);
mgmt->u.assoc_req.capab_info = host_to_le16(capab);
mgmt->u.assoc_req.listen_interval = host_to_le16(1);
}
/* SSID */
ies = pos = buf + blen;
blen += 2 + wpa_s->mlme.ssid_len;
*pos++ = WLAN_EID_SSID;
*pos++ = wpa_s->mlme.ssid_len;
os_memcpy(pos, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len);
len = wpa_s->mlme.num_curr_rates;
if (len > 8)
len = 8;
pos = buf + blen;
blen += len + 2;
*pos++ = WLAN_EID_SUPP_RATES;
*pos++ = len;
for (i = 0; i < len; i++) {
int rate = wpa_s->mlme.curr_rates[i].rate;
*pos++ = (u8) (rate / 5);
}
if (wpa_s->mlme.num_curr_rates > len) {
pos = buf + blen;
blen += wpa_s->mlme.num_curr_rates - len + 2;
*pos++ = WLAN_EID_EXT_SUPP_RATES;
*pos++ = wpa_s->mlme.num_curr_rates - len;
for (i = len; i < wpa_s->mlme.num_curr_rates; i++) {
int rate = wpa_s->mlme.curr_rates[i].rate;
*pos++ = (u8) (rate / 5);
}
}
if (wpa_s->mlme.extra_ie && wpa_s->mlme.auth_alg != WLAN_AUTH_FT) {
pos = buf + blen;
blen += wpa_s->mlme.extra_ie_len;
os_memcpy(pos, wpa_s->mlme.extra_ie, wpa_s->mlme.extra_ie_len);
}
#ifdef CONFIG_IEEE80211R
if ((wpa_s->mlme.key_mgmt == KEY_MGMT_FT_802_1X ||
wpa_s->mlme.key_mgmt == KEY_MGMT_FT_PSK) &&
wpa_s->mlme.auth_alg != WLAN_AUTH_FT &&
bss && bss->mdie &&
bss->mdie_len >= 2 + sizeof(struct rsn_mdie) &&
bss->mdie[1] >= sizeof(struct rsn_mdie)) {
pos = buf + blen;
blen += 2 + sizeof(struct rsn_mdie);
*pos++ = WLAN_EID_MOBILITY_DOMAIN;
*pos++ = sizeof(struct rsn_mdie);
os_memcpy(pos, bss->mdie + 2, MOBILITY_DOMAIN_ID_LEN);
pos += MOBILITY_DOMAIN_ID_LEN;
*pos++ = 0; /* FIX: copy from the target AP's MDIE */
}
if ((wpa_s->mlme.key_mgmt == KEY_MGMT_FT_802_1X ||
wpa_s->mlme.key_mgmt == KEY_MGMT_FT_PSK) &&
wpa_s->mlme.auth_alg == WLAN_AUTH_FT && wpa_s->mlme.ft_ies) {
pos = buf + blen;
os_memcpy(pos, wpa_s->mlme.ft_ies, wpa_s->mlme.ft_ies_len);
pos += wpa_s->mlme.ft_ies_len;
blen += wpa_s->mlme.ft_ies_len;
}
#endif /* CONFIG_IEEE80211R */
if (wmm && wpa_s->mlme.wmm_enabled) {
pos = buf + blen;
blen += 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;
}
os_free(wpa_s->mlme.assocreq_ies);
wpa_s->mlme.assocreq_ies_len = (buf + blen) - ies;
wpa_s->mlme.assocreq_ies = os_malloc(wpa_s->mlme.assocreq_ies_len);
if (wpa_s->mlme.assocreq_ies) {
os_memcpy(wpa_s->mlme.assocreq_ies, ies,
wpa_s->mlme.assocreq_ies_len);
}
ieee80211_sta_tx(wpa_s, buf, blen);
os_free(buf);
}
static void ieee80211_send_deauth(struct wpa_supplicant *wpa_s, u16 reason)
{
u8 *buf;
size_t len;
struct ieee80211_mgmt *mgmt;
buf = os_zalloc(sizeof(*mgmt));
if (buf == NULL) {
wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
"deauth frame");
return;
}
mgmt = (struct ieee80211_mgmt *) buf;
len = 24;
os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_DEAUTH);
len += 2;
mgmt->u.deauth.reason_code = host_to_le16(reason);
ieee80211_sta_tx(wpa_s, buf, len);
os_free(buf);
}
static void ieee80211_send_disassoc(struct wpa_supplicant *wpa_s, u16 reason)
{
u8 *buf;
size_t len;
struct ieee80211_mgmt *mgmt;
buf = os_zalloc(sizeof(*mgmt));
if (buf == NULL) {
wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
"disassoc frame");
return;
}
mgmt = (struct ieee80211_mgmt *) buf;
len = 24;
os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_DISASSOC);
len += 2;
mgmt->u.disassoc.reason_code = host_to_le16(reason);
ieee80211_sta_tx(wpa_s, buf, len);
os_free(buf);
}
static int ieee80211_privacy_mismatch(struct wpa_supplicant *wpa_s)
{
struct ieee80211_sta_bss *bss;
int res = 0;
if (wpa_s->mlme.mixed_cell ||
wpa_s->mlme.key_mgmt != KEY_MGMT_NONE)
return 0;
bss = ieee80211_bss_get(wpa_s, wpa_s->bssid);
if (bss == NULL)
return 0;
if (ieee80211_sta_wep_configured(wpa_s) !=
!!(bss->capability & WLAN_CAPABILITY_PRIVACY))
res = 1;
return res;
}
static void ieee80211_associate(struct wpa_supplicant *wpa_s)
{
wpa_s->mlme.assoc_tries++;
if (wpa_s->mlme.assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
wpa_printf(MSG_DEBUG, "MLME: association with AP " MACSTR
" timed out", MAC2STR(wpa_s->bssid));
return;
}
wpa_s->mlme.state = IEEE80211_ASSOCIATE;
wpa_printf(MSG_DEBUG, "MLME: associate with AP " MACSTR,
MAC2STR(wpa_s->bssid));
if (ieee80211_privacy_mismatch(wpa_s)) {
wpa_printf(MSG_DEBUG, "MLME: mismatch in privacy "
"configuration and mixed-cell disabled - abort "
"association");
return;
}
ieee80211_send_assoc(wpa_s);
ieee80211_reschedule_timer(wpa_s, IEEE80211_ASSOC_TIMEOUT);
}
static void ieee80211_associated(struct wpa_supplicant *wpa_s)
{
int disassoc;
/* 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 */
wpa_s->mlme.state = IEEE80211_ASSOCIATED;
#if 0 /* FIX */
sta = sta_info_get(local, wpa_s->bssid);
if (sta == NULL) {
wpa_printf(MSG_DEBUG "MLME: No STA entry for own AP " MACSTR,
MAC2STR(wpa_s->bssid));
disassoc = 1;
} else {
disassoc = 0;
if (time_after(jiffies,
sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
if (wpa_s->mlme.probereq_poll) {
wpa_printf(MSG_DEBUG "MLME: No ProbeResp from "
"current AP " MACSTR " - assume "
"out of range",
MAC2STR(wpa_s->bssid));
disassoc = 1;
} else {
ieee80211_send_probe_req(
wpa_s->bssid,
wpa_s->mlme.scan_ssid,
wpa_s->mlme.scan_ssid_len);
wpa_s->mlme.probereq_poll = 1;
}
} else {
wpa_s->mlme.probereq_poll = 0;
if (time_after(jiffies, wpa_s->mlme.last_probe +
IEEE80211_PROBE_INTERVAL)) {
wpa_s->mlme.last_probe = jiffies;
ieee80211_send_probe_req(wpa_s->bssid,
wpa_s->mlme.ssid,
wpa_s->mlme.ssid_len);
}
}
sta_info_release(local, sta);
}
#else
disassoc = 0;
#endif
if (disassoc) {
wpa_supplicant_event(wpa_s, EVENT_DISASSOC, NULL);
ieee80211_reschedule_timer(wpa_s,
IEEE80211_MONITORING_INTERVAL +
30000);
} else {
ieee80211_reschedule_timer(wpa_s,
IEEE80211_MONITORING_INTERVAL);
}
}
static void ieee80211_send_probe_req(struct wpa_supplicant *wpa_s,
const u8 *dst,
const u8 *ssid, size_t ssid_len)
{
u8 *buf;
size_t len;
struct ieee80211_mgmt *mgmt;
u8 *pos, *supp_rates;
u8 *esupp_rates = NULL;
int i;
buf = os_malloc(sizeof(*mgmt) + 200 + wpa_s->mlme.extra_probe_ie_len);
if (buf == NULL) {
wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
"probe request");
return;
}
mgmt = (struct ieee80211_mgmt *) buf;
len = 24;
os_memset(mgmt, 0, 24);
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_PROBE_REQ);
os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
if (dst) {
os_memcpy(mgmt->da, dst, ETH_ALEN);
os_memcpy(mgmt->bssid, dst, ETH_ALEN);
} else {
os_memset(mgmt->da, 0xff, ETH_ALEN);
os_memset(mgmt->bssid, 0xff, ETH_ALEN);
}
pos = buf + len;
len += 2 + ssid_len;
*pos++ = WLAN_EID_SSID;
*pos++ = ssid_len;
os_memcpy(pos, ssid, ssid_len);
supp_rates = buf + len;
len += 2;
supp_rates[0] = WLAN_EID_SUPP_RATES;
supp_rates[1] = 0;
for (i = 0; i < wpa_s->mlme.num_curr_rates; i++) {
struct wpa_rate_data *rate = &wpa_s->mlme.curr_rates[i];
if (esupp_rates) {
pos = buf + len;
len++;
esupp_rates[1]++;
} else if (supp_rates[1] == 8) {
esupp_rates = pos;
esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
esupp_rates[1] = 1;
pos = &esupp_rates[2];
len += 3;
} else {
pos = buf + len;
len++;
supp_rates[1]++;
}
*pos++ = rate->rate / 5;
}
if (wpa_s->mlme.extra_probe_ie) {
os_memcpy(pos, wpa_s->mlme.extra_probe_ie,
wpa_s->mlme.extra_probe_ie_len);
len += wpa_s->mlme.extra_probe_ie_len;
}
ieee80211_sta_tx(wpa_s, buf, len);
os_free(buf);
}
static int ieee80211_sta_wep_configured(struct wpa_supplicant *wpa_s)
{
#if 0 /* FIX */
if (sdata == NULL || sdata->default_key == NULL ||
sdata->default_key->alg != ALG_WEP)
return 0;
return 1;
#else
return 0;
#endif
}
static void ieee80211_auth_completed(struct wpa_supplicant *wpa_s)
{
wpa_printf(MSG_DEBUG, "MLME: authenticated");
wpa_s->mlme.authenticated = 1;
ieee80211_associate(wpa_s);
}
static void ieee80211_auth_challenge(struct wpa_supplicant *wpa_s,
struct ieee80211_mgmt *mgmt,
size_t len,
struct ieee80211_rx_status *rx_status)
{
u8 *pos;
struct ieee802_11_elems elems;
wpa_printf(MSG_DEBUG, "MLME: replying to auth challenge");
pos = mgmt->u.auth.variable;
if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
== ParseFailed) {
wpa_printf(MSG_DEBUG, "MLME: failed to parse Auth(challenge)");
return;
}
if (elems.challenge == NULL) {
wpa_printf(MSG_DEBUG, "MLME: no challenge IE in shared key "
"auth frame");
return;
}
ieee80211_send_auth(wpa_s, 3, elems.challenge - 2,
elems.challenge_len + 2, 1);
}
static void ieee80211_rx_mgmt_auth(struct wpa_supplicant *wpa_s,
struct ieee80211_mgmt *mgmt,
size_t len,
struct ieee80211_rx_status *rx_status)
{
struct wpa_ssid *ssid = wpa_s->current_ssid;
u16 auth_alg, auth_transaction, status_code;
int adhoc;
adhoc = ssid && ssid->mode == 1;
if (wpa_s->mlme.state != IEEE80211_AUTHENTICATE && !adhoc) {
wpa_printf(MSG_DEBUG, "MLME: authentication frame received "
"from " MACSTR ", but not in authenticate state - "
"ignored", MAC2STR(mgmt->sa));
return;
}
if (len < 24 + 6) {
wpa_printf(MSG_DEBUG, "MLME: too short (%lu) authentication "
"frame received from " MACSTR " - ignored",
(unsigned long) len, MAC2STR(mgmt->sa));
return;
}
if (!adhoc && os_memcmp(wpa_s->bssid, mgmt->sa, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "MLME: authentication frame received "
"from unknown AP (SA=" MACSTR " BSSID=" MACSTR
") - ignored",
MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
return;
}
if (adhoc && os_memcmp(wpa_s->bssid, mgmt->bssid, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "MLME: authentication frame received "
"from unknown BSSID (SA=" MACSTR " BSSID=" MACSTR
") - ignored",
MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
return;
}
auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
status_code = le_to_host16(mgmt->u.auth.status_code);
wpa_printf(MSG_DEBUG, "MLME: RX authentication from " MACSTR
" (alg=%d transaction=%d status=%d)",
MAC2STR(mgmt->sa), auth_alg, auth_transaction, status_code);
if (adhoc) {
/* 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) {
wpa_printf(MSG_DEBUG, "MLME: unexpected IBSS "
"authentication frame (alg=%d "
"transaction=%d)",
auth_alg, auth_transaction);
return;
}
ieee80211_send_auth(wpa_s, 2, NULL, 0, 0);
}
if (auth_alg != wpa_s->mlme.auth_alg ||
auth_transaction != wpa_s->mlme.auth_transaction) {
wpa_printf(MSG_DEBUG, "MLME: unexpected authentication frame "
"(alg=%d transaction=%d)",
auth_alg, auth_transaction);
return;
}
if (status_code != WLAN_STATUS_SUCCESS) {
wpa_printf(MSG_DEBUG, "MLME: AP denied authentication "
"(auth_alg=%d code=%d)", wpa_s->mlme.auth_alg,
status_code);
if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
const int num_algs = 3;
u8 algs[num_algs];
int i, pos;
algs[0] = algs[1] = algs[2] = 0xff;
if (wpa_s->mlme.auth_algs & IEEE80211_AUTH_ALG_OPEN)
algs[0] = WLAN_AUTH_OPEN;
if (wpa_s->mlme.auth_algs &
IEEE80211_AUTH_ALG_SHARED_KEY)
algs[1] = WLAN_AUTH_SHARED_KEY;
if (wpa_s->mlme.auth_algs & IEEE80211_AUTH_ALG_LEAP)
algs[2] = WLAN_AUTH_LEAP;
if (wpa_s->mlme.auth_alg == WLAN_AUTH_OPEN)
pos = 0;
else if (wpa_s->mlme.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] == wpa_s->mlme.auth_alg ||
algs[pos] == 0xff)
continue;
if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
!ieee80211_sta_wep_configured(wpa_s))
continue;
wpa_s->mlme.auth_alg = algs[pos];
wpa_printf(MSG_DEBUG, "MLME: set auth_alg=%d "
"for next try",
wpa_s->mlme.auth_alg);
break;
}
}
return;
}
switch (wpa_s->mlme.auth_alg) {
case WLAN_AUTH_OPEN:
case WLAN_AUTH_LEAP:
ieee80211_auth_completed(wpa_s);
break;
case WLAN_AUTH_SHARED_KEY:
if (wpa_s->mlme.auth_transaction == 4)
ieee80211_auth_completed(wpa_s);
else
ieee80211_auth_challenge(wpa_s, mgmt, len,
rx_status);
break;
#ifdef CONFIG_IEEE80211R
case WLAN_AUTH_FT:
{
union wpa_event_data data;
os_memset(&data, 0, sizeof(data));
data.ft_ies.ies = mgmt->u.auth.variable;
data.ft_ies.ies_len = len -
(mgmt->u.auth.variable - (u8 *) mgmt);
os_memcpy(data.ft_ies.target_ap, wpa_s->bssid, ETH_ALEN);
wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &data);
ieee80211_auth_completed(wpa_s);
break;
}
#endif /* CONFIG_IEEE80211R */
}
}
static void ieee80211_rx_mgmt_deauth(struct wpa_supplicant *wpa_s,
struct ieee80211_mgmt *mgmt,
size_t len,
struct ieee80211_rx_status *rx_status)
{
u16 reason_code;
if (len < 24 + 2) {
wpa_printf(MSG_DEBUG, "MLME: too short (%lu) deauthentication "
"frame received from " MACSTR " - ignored",
(unsigned long) len, MAC2STR(mgmt->sa));
return;
}
if (os_memcmp(wpa_s->bssid, mgmt->sa, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "MLME: deauthentication frame received "
"from unknown AP (SA=" MACSTR " BSSID=" MACSTR
") - ignored",
MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
return;
}
reason_code = le_to_host16(mgmt->u.deauth.reason_code);
wpa_printf(MSG_DEBUG, "MLME: RX deauthentication from " MACSTR
" (reason=%d)", MAC2STR(mgmt->sa), reason_code);
if (wpa_s->mlme.authenticated)
wpa_printf(MSG_DEBUG, "MLME: deauthenticated");
if (wpa_s->mlme.state == IEEE80211_AUTHENTICATE ||
wpa_s->mlme.state == IEEE80211_ASSOCIATE ||
wpa_s->mlme.state == IEEE80211_ASSOCIATED) {
wpa_s->mlme.state = IEEE80211_AUTHENTICATE;
ieee80211_reschedule_timer(wpa_s,
IEEE80211_RETRY_AUTH_INTERVAL);
}
ieee80211_set_associated(wpa_s, 0);
wpa_s->mlme.authenticated = 0;
}
static void ieee80211_rx_mgmt_disassoc(struct wpa_supplicant *wpa_s,
struct ieee80211_mgmt *mgmt,
size_t len,
struct ieee80211_rx_status *rx_status)
{
u16 reason_code;
if (len < 24 + 2) {
wpa_printf(MSG_DEBUG, "MLME: too short (%lu) disassociation "
"frame received from " MACSTR " - ignored",
(unsigned long) len, MAC2STR(mgmt->sa));
return;
}
if (os_memcmp(wpa_s->bssid, mgmt->sa, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "MLME: disassociation frame received "
"from unknown AP (SA=" MACSTR " BSSID=" MACSTR
") - ignored",
MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
return;
}
reason_code = le_to_host16(mgmt->u.disassoc.reason_code);
wpa_printf(MSG_DEBUG, "MLME: RX disassociation from " MACSTR
" (reason=%d)", MAC2STR(mgmt->sa), reason_code);
if (wpa_s->mlme.associated)
wpa_printf(MSG_DEBUG, "MLME: disassociated");
if (wpa_s->mlme.state == IEEE80211_ASSOCIATED) {
wpa_s->mlme.state = IEEE80211_ASSOCIATE;
ieee80211_reschedule_timer(wpa_s,
IEEE80211_RETRY_AUTH_INTERVAL);
}
ieee80211_set_associated(wpa_s, 0);
}
static int ieee80211_ft_assoc_resp(struct wpa_supplicant *wpa_s,
struct ieee802_11_elems *elems)
{
#ifdef CONFIG_IEEE80211R
const u8 *mobility_domain = NULL;
const u8 *r0kh_id = NULL;
size_t r0kh_id_len = 0;
const u8 *r1kh_id = NULL;
struct rsn_ftie *hdr;
const u8 *pos, *end;
if (elems->mdie && elems->mdie_len >= MOBILITY_DOMAIN_ID_LEN)
mobility_domain = elems->mdie;
if (elems->ftie && elems->ftie_len >= sizeof(struct rsn_ftie)) {
end = elems->ftie + elems->ftie_len;
hdr = (struct rsn_ftie *) elems->ftie;
pos = (const u8 *) (hdr + 1);
while (pos + 1 < end) {
if (pos + 2 + pos[1] > end)
break;
if (pos[0] == FTIE_SUBELEM_R1KH_ID &&
pos[1] == FT_R1KH_ID_LEN)
r1kh_id = pos + 2;
else if (pos[0] == FTIE_SUBELEM_R0KH_ID &&
pos[1] >= 1 && pos[1] <= FT_R0KH_ID_MAX_LEN) {
r0kh_id = pos + 2;
r0kh_id_len = pos[1];
}
pos += 2 + pos[1];
}
}
return wpa_sm_set_ft_params(wpa_s->wpa, mobility_domain, r0kh_id,
r0kh_id_len, r1kh_id);
#else /* CONFIG_IEEE80211R */
return 0;
#endif /* CONFIG_IEEE80211R */
}
static void ieee80211_rx_mgmt_assoc_resp(struct wpa_supplicant *wpa_s,
struct ieee80211_mgmt *mgmt,
size_t len,
struct ieee80211_rx_status *rx_status,
int reassoc)
{
u8 rates[32];
size_t rates_len;
u16 capab_info, status_code, aid;
struct ieee802_11_elems elems;
u8 *pos;
/* AssocResp and ReassocResp have identical structure, so process both
* of them in this function. */
if (wpa_s->mlme.state != IEEE80211_ASSOCIATE) {
wpa_printf(MSG_DEBUG, "MLME: association frame received from "
MACSTR ", but not in associate state - ignored",
MAC2STR(mgmt->sa));
return;
}
if (len < 24 + 6) {
wpa_printf(MSG_DEBUG, "MLME: too short (%lu) association "
"frame received from " MACSTR " - ignored",
(unsigned long) len, MAC2STR(mgmt->sa));
return;
}
if (os_memcmp(wpa_s->bssid, mgmt->sa, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "MLME: association frame received from "
"unknown AP (SA=" MACSTR " BSSID=" MACSTR ") - "
"ignored", MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
return;
}
capab_info = le_to_host16(mgmt->u.assoc_resp.capab_info);
status_code = le_to_host16(mgmt->u.assoc_resp.status_code);
aid = le_to_host16(mgmt->u.assoc_resp.aid);
if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
wpa_printf(MSG_DEBUG, "MLME: invalid aid value %d; bits 15:14 "
"not set", aid);
aid &= ~(BIT(15) | BIT(14));
wpa_printf(MSG_DEBUG, "MLME: RX %sssocResp from " MACSTR
" (capab=0x%x status=%d aid=%d)",
reassoc ? "Rea" : "A", MAC2STR(mgmt->sa),
capab_info, status_code, aid);
pos = mgmt->u.assoc_resp.variable;
if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
== ParseFailed) {
wpa_printf(MSG_DEBUG, "MLME: failed to parse AssocResp");
return;
}
if (status_code != WLAN_STATUS_SUCCESS) {
wpa_printf(MSG_DEBUG, "MLME: AP denied association (code=%d)",
status_code);
#ifdef CONFIG_IEEE80211W
if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
elems.assoc_comeback && elems.assoc_comeback_len == 4) {
u32 tu, ms;
tu = WPA_GET_LE32(elems.assoc_comeback);
ms = tu * 1024 / 1000;
wpa_printf(MSG_DEBUG, "MLME: AP rejected association "
"temporarily; comeback duration %u TU "
"(%u ms)", tu, ms);
if (ms > IEEE80211_ASSOC_TIMEOUT) {
wpa_printf(MSG_DEBUG, "MLME: Update timer "
"based on comeback duration");
ieee80211_reschedule_timer(wpa_s, ms);
}
}
#endif /* CONFIG_IEEE80211W */
return;
}
if (elems.supp_rates == NULL) {
wpa_printf(MSG_DEBUG, "MLME: no SuppRates element in "
"AssocResp");
return;
}
if (wpa_s->mlme.auth_alg == WLAN_AUTH_FT) {
if (!reassoc) {
wpa_printf(MSG_DEBUG, "MLME: AP tried to use "
"association, not reassociation, response "
"with FT");
return;
}
if (wpa_ft_validate_reassoc_resp(
wpa_s->wpa, pos, len - (pos - (u8 *) mgmt),
mgmt->sa) < 0) {
wpa_printf(MSG_DEBUG, "MLME: FT validation of Reassoc"
"Resp failed");
return;
}
} else if (ieee80211_ft_assoc_resp(wpa_s, &elems) < 0)
return;
wpa_printf(MSG_DEBUG, "MLME: associated");
wpa_s->mlme.aid = aid;
wpa_s->mlme.ap_capab = capab_info;
os_free(wpa_s->mlme.assocresp_ies);
wpa_s->mlme.assocresp_ies_len = len - (pos - (u8 *) mgmt);
wpa_s->mlme.assocresp_ies = os_malloc(wpa_s->mlme.assocresp_ies_len);
if (wpa_s->mlme.assocresp_ies) {
os_memcpy(wpa_s->mlme.assocresp_ies, pos,
wpa_s->mlme.assocresp_ies_len);
}
ieee80211_set_associated(wpa_s, 1);
rates_len = elems.supp_rates_len;
if (rates_len > sizeof(rates))
rates_len = sizeof(rates);
os_memcpy(rates, elems.supp_rates, rates_len);
if (elems.ext_supp_rates) {
size_t _len = elems.ext_supp_rates_len;
if (_len > sizeof(rates) - rates_len)
_len = sizeof(rates) - rates_len;
os_memcpy(rates + rates_len, elems.ext_supp_rates, _len);
rates_len += _len;
}
if (wpa_drv_set_bssid(wpa_s, wpa_s->bssid) < 0) {
wpa_printf(MSG_DEBUG, "MLME: failed to set BSSID for the "
"netstack");
}
if (wpa_drv_set_ssid(wpa_s, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len) <
0) {
wpa_printf(MSG_DEBUG, "MLME: failed to set SSID for the "
"netstack");
}
/* Remove STA entry before adding a new one just in case to avoid
* problems with existing configuration (e.g., keys). */
wpa_drv_mlme_remove_sta(wpa_s, wpa_s->bssid);
if (wpa_drv_mlme_add_sta(wpa_s, wpa_s->bssid, rates, rates_len) < 0) {
wpa_printf(MSG_DEBUG, "MLME: failed to add STA entry to the "
"netstack");
}
#if 0 /* FIX? */
sta->assoc_ap = 1;
if (elems.wmm_param && wpa_s->mlme.wmm_enabled) {
sta->flags |= WLAN_STA_WME;
ieee80211_sta_wmm_params(wpa_s, elems.wmm_param,
elems.wmm_param_len);
}
#endif
ieee80211_associated(wpa_s);
}
/* Caller must hold local->sta_bss_lock */
static void __ieee80211_bss_hash_add(struct wpa_supplicant *wpa_s,
struct ieee80211_sta_bss *bss)
{
bss->hnext = wpa_s->mlme.sta_bss_hash[STA_HASH(bss->bssid)];
wpa_s->mlme.sta_bss_hash[STA_HASH(bss->bssid)] = bss;
}
/* Caller must hold local->sta_bss_lock */
static void __ieee80211_bss_hash_del(struct wpa_supplicant *wpa_s,
struct ieee80211_sta_bss *bss)
{
struct ieee80211_sta_bss *b, *prev = NULL;
b = wpa_s->mlme.sta_bss_hash[STA_HASH(bss->bssid)];
while (b) {
if (b == bss) {
if (prev == NULL) {
wpa_s->mlme.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_bss_add(struct wpa_supplicant *wpa_s, const u8 *bssid)
{
struct ieee80211_sta_bss *bss;
bss = os_zalloc(sizeof(*bss));
if (bss == NULL)
return NULL;
os_memcpy(bss->bssid, bssid, ETH_ALEN);
/* TODO: order by RSSI? */
bss->next = wpa_s->mlme.sta_bss_list;
wpa_s->mlme.sta_bss_list = bss;
__ieee80211_bss_hash_add(wpa_s, bss);
return bss;
}
static struct ieee80211_sta_bss *
ieee80211_bss_get(struct wpa_supplicant *wpa_s, const u8 *bssid)
{
struct ieee80211_sta_bss *bss;
bss = wpa_s->mlme.sta_bss_hash[STA_HASH(bssid)];
while (bss) {
if (os_memcmp(bss->bssid, bssid, ETH_ALEN) == 0)
break;
bss = bss->hnext;
}
return bss;
}
static void ieee80211_bss_free(struct wpa_supplicant *wpa_s,
struct ieee80211_sta_bss *bss)
{
__ieee80211_bss_hash_del(wpa_s, bss);
os_free(bss->ie);
os_free(bss->wpa_ie);
os_free(bss->rsn_ie);
os_free(bss->wmm_ie);
os_free(bss->mdie);
os_free(bss);
}
static void ieee80211_bss_list_deinit(struct wpa_supplicant *wpa_s)
{
struct ieee80211_sta_bss *bss, *prev;
bss = wpa_s->mlme.sta_bss_list;
wpa_s->mlme.sta_bss_list = NULL;
while (bss) {
prev = bss;
bss = bss->next;
ieee80211_bss_free(wpa_s, prev);
}
}
static void ieee80211_bss_info(struct wpa_supplicant *wpa_s,
struct ieee80211_mgmt *mgmt,
size_t len,
struct ieee80211_rx_status *rx_status,
int beacon)
{
struct ieee802_11_elems elems;
size_t baselen;
int channel, invalid = 0, clen;
struct ieee80211_sta_bss *bss;
u64 timestamp;
u8 *pos, *ie_pos;
size_t ie_len;
if (!beacon && os_memcmp(mgmt->da, wpa_s->own_addr, ETH_ALEN))
return; /* ignore ProbeResp to foreign address */
#if 0
wpa_printf(MSG_MSGDUMP, "MLME: RX %s from " MACSTR " to " MACSTR,
beacon ? "Beacon" : "Probe Response",
MAC2STR(mgmt->sa), MAC2STR(mgmt->da));
#endif
baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
if (baselen > len)
return;
pos = mgmt->u.beacon.timestamp;
timestamp = WPA_GET_LE64(pos);
#if 0 /* FIX */
if (local->conf.mode == IW_MODE_ADHOC && beacon &&
os_memcmp(mgmt->bssid, local->bssid, ETH_ALEN) == 0) {
#ifdef IEEE80211_IBSS_DEBUG
static unsigned long last_tsf_debug = 0;
u64 tsf;
if (local->hw->get_tsf)
tsf = local->hw->get_tsf(local->mdev);
else
tsf = -1LLU;
if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
wpa_printf(MSG_DEBUG, "RX beacon SA=" MACSTR " BSSID="
MACSTR " TSF=0x%llx BCN=0x%llx diff=%lld "
"@%ld",
MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid),
tsf, timestamp, tsf - timestamp, jiffies);
last_tsf_debug = jiffies;
}
#endif /* IEEE80211_IBSS_DEBUG */
}
#endif
ie_pos = mgmt->u.beacon.variable;
ie_len = len - baselen;
if (ieee802_11_parse_elems(ie_pos, ie_len, &elems) == ParseFailed)
invalid = 1;
#if 0 /* FIX */
if (local->conf.mode == IW_MODE_ADHOC && elems.supp_rates &&
os_memcmp(mgmt->bssid, local->bssid, ETH_ALEN) == 0 &&
(sta = sta_info_get(local, mgmt->sa))) {
struct ieee80211_rate *rates;
size_t num_rates;
u32 supp_rates, prev_rates;
int i, j, oper_mode;
rates = local->curr_rates;
num_rates = local->num_curr_rates;
oper_mode = wpa_s->mlme.sta_scanning ?
local->scan_oper_phymode : local->conf.phymode;
for (i = 0; i < local->hw->num_modes; i++) {
struct ieee80211_hw_modes *mode = &local->hw->modes[i];
if (oper_mode == mode->mode) {
rates = mode->rates;
num_rates = mode->num_rates;
break;
}
}
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);
if (oper_mode == MODE_ATHEROS_TURBO)
own_rate *= 2;
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 = wpa_s->mlme.supp_rates_bits;
}
if (sta->supp_rates != prev_rates) {
wpa_printf(MSG_DEBUG, "MLME: updated supp_rates set "
"for " MACSTR " based on beacon info "
"(0x%x & 0x%x -> 0x%x)",
MAC2STR(sta->addr), prev_rates,
supp_rates, sta->supp_rates);
}
sta_info_release(local, sta);
}
#endif
if (elems.ssid == NULL)
return;
if (elems.ds_params && elems.ds_params_len == 1)
channel = elems.ds_params[0];
else
channel = rx_status->channel;
bss = ieee80211_bss_get(wpa_s, mgmt->bssid);
if (bss == NULL) {
bss = ieee80211_bss_add(wpa_s, mgmt->bssid);
if (bss == NULL)
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. */
return;
}
bss->beacon_int = le_to_host16(mgmt->u.beacon.beacon_int);
bss->capability = le_to_host16(mgmt->u.beacon.capab_info);
if (bss->ie == NULL || bss->ie_len < ie_len) {
os_free(bss->ie);
bss->ie = os_malloc(ie_len);
}
if (bss->ie) {
os_memcpy(bss->ie, ie_pos, ie_len);
bss->ie_len = ie_len;
}
if (elems.ssid && elems.ssid_len <= MAX_SSID_LEN) {
os_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;
os_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;
os_memcpy(&bss->supp_rates[bss->supp_rates_len],
elems.ext_supp_rates, clen);
bss->supp_rates_len += clen;
}
if (elems.wpa &&
(bss->wpa_ie == NULL || bss->wpa_ie_len != elems.wpa_len ||
os_memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
os_free(bss->wpa_ie);
bss->wpa_ie = os_malloc(elems.wpa_len + 2);
if (bss->wpa_ie) {
os_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) {
os_free(bss->wpa_ie);
bss->wpa_ie = NULL;
bss->wpa_ie_len = 0;
}
if (elems.rsn &&
(bss->rsn_ie == NULL || bss->rsn_ie_len != elems.rsn_len ||
os_memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
os_free(bss->rsn_ie);
bss->rsn_ie = os_malloc(elems.rsn_len + 2);
if (bss->rsn_ie) {
os_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) {
os_free(bss->rsn_ie);
bss->rsn_ie = NULL;
bss->rsn_ie_len = 0;
}
if (elems.wmm_param &&
(bss->wmm_ie == NULL || bss->wmm_ie_len != elems.wmm_param_len ||
os_memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
os_free(bss->wmm_ie);
bss->wmm_ie = os_malloc(elems.wmm_param_len + 2);
if (bss->wmm_ie) {
os_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) {
os_free(bss->wmm_ie);
bss->wmm_ie = NULL;
bss->wmm_ie_len = 0;
}
#ifdef CONFIG_IEEE80211R
if (elems.mdie &&
(bss->mdie == NULL || bss->mdie_len != elems.mdie_len ||
os_memcmp(bss->mdie, elems.mdie, elems.mdie_len))) {
os_free(bss->mdie);
bss->mdie = os_malloc(elems.mdie_len + 2);
if (bss->mdie) {
os_memcpy(bss->mdie, elems.mdie - 2,
elems.mdie_len + 2);
bss->mdie_len = elems.mdie_len + 2;
} else
bss->mdie_len = 0;
} else if (!elems.mdie && bss->mdie) {
os_free(bss->mdie);
bss->mdie = NULL;
bss->mdie_len = 0;
}
#endif /* CONFIG_IEEE80211R */
bss->hw_mode = wpa_s->mlme.phymode;
bss->channel = channel;
bss->freq = wpa_s->mlme.freq;
if (channel != wpa_s->mlme.channel &&
(wpa_s->mlme.phymode == WPA_MODE_IEEE80211G ||
wpa_s->mlme.phymode == WPA_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;
os_get_time(&bss->last_update);
bss->rssi = rx_status->ssi;
if (!beacon)
bss->probe_resp++;
}
static void ieee80211_rx_mgmt_probe_resp(struct wpa_supplicant *wpa_s,
struct ieee80211_mgmt *mgmt,
size_t len,
struct ieee80211_rx_status *rx_status)
{
ieee80211_bss_info(wpa_s, mgmt, len, rx_status, 0);
}
static void ieee80211_rx_mgmt_beacon(struct wpa_supplicant *wpa_s,
struct ieee80211_mgmt *mgmt,
size_t len,
struct ieee80211_rx_status *rx_status)
{
int use_protection;
size_t baselen;
struct ieee802_11_elems elems;
ieee80211_bss_info(wpa_s, mgmt, len, rx_status, 1);
if (!wpa_s->mlme.associated ||
os_memcmp(wpa_s->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;
use_protection = 0;
if (elems.erp_info && elems.erp_info_len >= 1) {
use_protection =
(elems.erp_info[0] & ERP_INFO_USE_PROTECTION) != 0;
}
if (use_protection != !!wpa_s->mlme.use_protection) {
wpa_printf(MSG_DEBUG, "MLME: CTS protection %s (BSSID=" MACSTR
")",
use_protection ? "enabled" : "disabled",
MAC2STR(wpa_s->bssid));
wpa_s->mlme.use_protection = use_protection ? 1 : 0;
wpa_s->mlme.cts_protect_erp_frames = use_protection;
}
if (elems.wmm_param && wpa_s->mlme.wmm_enabled) {
ieee80211_sta_wmm_params(wpa_s, elems.wmm_param,
elems.wmm_param_len);
}
}
static void ieee80211_rx_mgmt_probe_req(struct wpa_supplicant *wpa_s,
struct ieee80211_mgmt *mgmt,
size_t len,
struct ieee80211_rx_status *rx_status)
{
int tx_last_beacon, adhoc;
#if 0 /* FIX */
struct ieee80211_mgmt *resp;
#endif
u8 *pos, *end;
struct wpa_ssid *ssid = wpa_s->current_ssid;
adhoc = ssid && ssid->mode == 1;
if (!adhoc || wpa_s->mlme.state != IEEE80211_IBSS_JOINED ||
len < 24 + 2 || wpa_s->mlme.probe_resp == NULL)
return;
#if 0 /* FIX */
if (local->hw->tx_last_beacon)
tx_last_beacon = local->hw->tx_last_beacon(local->mdev);
else
#endif
tx_last_beacon = 1;
#ifdef IEEE80211_IBSS_DEBUG
wpa_printf(MSG_DEBUG, "MLME: RX ProbeReq SA=" MACSTR " DA=" MACSTR
" BSSID=" MACSTR " (tx_last_beacon=%d)",
MAC2STR(mgmt->sa), MAC2STR(mgmt->da),
MAC2STR(mgmt->bssid), tx_last_beacon);
#endif /* IEEE80211_IBSS_DEBUG */
if (!tx_last_beacon)
return;
if (os_memcmp(mgmt->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
os_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) {
wpa_printf(MSG_DEBUG, "MLME: Invalid SSID IE in ProbeReq from "
MACSTR, MAC2STR(mgmt->sa));
return;
}
if (pos[1] != 0 &&
(pos[1] != wpa_s->mlme.ssid_len ||
os_memcmp(pos + 2, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len) != 0))
{
/* Ignore ProbeReq for foreign SSID */
return;
}
#if 0 /* FIX */
/* Reply with ProbeResp */
skb = skb_copy(wpa_s->mlme.probe_resp, GFP_ATOMIC);
if (skb == NULL)
return;
resp = (struct ieee80211_mgmt *) skb->data;
os_memcpy(resp->da, mgmt->sa, ETH_ALEN);
#ifdef IEEE80211_IBSS_DEBUG
wpa_printf(MSG_DEBUG, "MLME: Sending ProbeResp to " MACSTR,
MAC2STR(resp->da));
#endif /* IEEE80211_IBSS_DEBUG */
ieee80211_sta_tx(wpa_s, skb, 0, 1);
#endif
}
#ifdef CONFIG_IEEE80211R
static void ieee80211_rx_mgmt_ft_action(struct wpa_supplicant *wpa_s,
struct ieee80211_mgmt *mgmt,
size_t len,
struct ieee80211_rx_status *rx_status)
{
union wpa_event_data data;
u16 status;
u8 *sta_addr, *target_ap_addr;
if (len < 24 + 1 + sizeof(mgmt->u.action.u.ft_action_resp)) {
wpa_printf(MSG_DEBUG, "MLME: Too short FT Action frame");
return;
}
/*
* Only FT Action Response is needed for now since reservation
* protocol is not supported.
*/
if (mgmt->u.action.u.ft_action_resp.action != 2) {
wpa_printf(MSG_DEBUG, "MLME: Unexpected FT Action %d",
mgmt->u.action.u.ft_action_resp.action);
return;
}
status = le_to_host16(mgmt->u.action.u.ft_action_resp.status_code);
sta_addr = mgmt->u.action.u.ft_action_resp.sta_addr;
target_ap_addr = mgmt->u.action.u.ft_action_resp.target_ap_addr;
wpa_printf(MSG_DEBUG, "MLME: Received FT Action Response: STA " MACSTR
" TargetAP " MACSTR " Status Code %d",
MAC2STR(sta_addr), MAC2STR(target_ap_addr), status);
if (os_memcmp(sta_addr, wpa_s->own_addr, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "MLME: Foreign STA Address " MACSTR
" in FT Action Response", MAC2STR(sta_addr));
return;
}
if (status) {
wpa_printf(MSG_DEBUG, "MLME: FT Action Response indicates "
"failure (status code %d)", status);
/* TODO: report error to FT code(?) */
return;
}
os_memset(&data, 0, sizeof(data));
data.ft_ies.ies = mgmt->u.action.u.ft_action_resp.variable;
data.ft_ies.ies_len = len - (mgmt->u.action.u.ft_action_resp.variable -
(u8 *) mgmt);
data.ft_ies.ft_action = 1;
os_memcpy(data.ft_ies.target_ap, target_ap_addr, ETH_ALEN);
wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &data);
/* TODO: should only re-associate, if EVENT_FT_RESPONSE was processed
* successfully */
wpa_s->mlme.prev_bssid_set = 1;
wpa_s->mlme.auth_alg = WLAN_AUTH_FT;
os_memcpy(wpa_s->mlme.prev_bssid, wpa_s->bssid, ETH_ALEN);
os_memcpy(wpa_s->bssid, target_ap_addr, ETH_ALEN);
ieee80211_associate(wpa_s);
}
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211W
/* MLME-PING.response */
static int ieee80211_sta_send_ping_resp(struct wpa_supplicant *wpa_s,
const u8 *addr, const u8 *trans_id)
{
struct ieee80211_mgmt *mgmt;
int res;
size_t len;
mgmt = os_zalloc(sizeof(*mgmt));
if (mgmt == NULL) {
wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
"ping action frame");
return -1;
}
len = 24;
os_memcpy(mgmt->da, addr, ETH_ALEN);
os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_ACTION);
mgmt->u.action.category = WLAN_ACTION_PING;
mgmt->u.action.u.ping_resp.action = WLAN_PING_RESPONSE;
os_memcpy(mgmt->u.action.u.ping_resp.trans_id, trans_id,
WLAN_PING_TRANS_ID_LEN);
len += 1 + sizeof(mgmt->u.action.u.ping_resp);
res = ieee80211_sta_tx(wpa_s, (u8 *) mgmt, len);
os_free(mgmt);
return res;
}
static void ieee80211_rx_mgmt_ping_action(
struct wpa_supplicant *wpa_s, struct ieee80211_mgmt *mgmt, size_t len,
struct ieee80211_rx_status *rx_status)
{
if (len < 24 + 1 + sizeof(mgmt->u.action.u.ping_req)) {
wpa_printf(MSG_DEBUG, "MLME: Too short Ping Action frame");
return;
}
if (mgmt->u.action.u.ping_req.action != WLAN_PING_REQUEST) {
wpa_printf(MSG_DEBUG, "MLME: Unexpected Ping Action %d",
mgmt->u.action.u.ping_req.action);
return;
}
if (os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "MLME: Ignore ping from unknown source "
MACSTR, MAC2STR(mgmt->sa));
return;
}
if (wpa_s->mlme.state == IEEE80211_ASSOCIATE) {
wpa_printf(MSG_DEBUG, "MLME: Ignore ping request during "
"association process");
return;
}
wpa_printf(MSG_DEBUG, "MLME: Replying to ping request");
ieee80211_sta_send_ping_resp(wpa_s, mgmt->sa,
mgmt->u.action.u.ping_req.trans_id);
}
#endif /* CONFIG_IEEE80211W */
static void ieee80211_rx_mgmt_action(struct wpa_supplicant *wpa_s,
struct ieee80211_mgmt *mgmt,
size_t len,
struct ieee80211_rx_status *rx_status)
{
wpa_printf(MSG_DEBUG, "MLME: received Action frame");
if (len < 25)
return;
switch (mgmt->u.action.category) {
#ifdef CONFIG_IEEE80211R
case WLAN_ACTION_FT:
ieee80211_rx_mgmt_ft_action(wpa_s, mgmt, len, rx_status);
break;
#endif /* CONFIG_IEEE80211R */
case WLAN_ACTION_PING:
ieee80211_rx_mgmt_ping_action(wpa_s, mgmt, len, rx_status);
break;
#ifdef CONFIG_IEEE80211W
#endif /* CONFIG_IEEE80211W */
default:
wpa_printf(MSG_DEBUG, "MLME: unknown Action Category %d",
mgmt->u.action.category);
break;
}
}
static void ieee80211_sta_rx_mgmt(struct wpa_supplicant *wpa_s,
const u8 *buf, size_t len,
struct ieee80211_rx_status *rx_status)
{
struct ieee80211_mgmt *mgmt;
u16 fc;
if (len < 24)
return;
mgmt = (struct ieee80211_mgmt *) buf;
fc = le_to_host16(mgmt->frame_control);
switch (WLAN_FC_GET_STYPE(fc)) {
case WLAN_FC_STYPE_PROBE_REQ:
ieee80211_rx_mgmt_probe_req(wpa_s, mgmt, len, rx_status);
break;
case WLAN_FC_STYPE_PROBE_RESP:
ieee80211_rx_mgmt_probe_resp(wpa_s, mgmt, len, rx_status);
break;
case WLAN_FC_STYPE_BEACON:
ieee80211_rx_mgmt_beacon(wpa_s, mgmt, len, rx_status);
break;
case WLAN_FC_STYPE_AUTH:
ieee80211_rx_mgmt_auth(wpa_s, mgmt, len, rx_status);
break;
case WLAN_FC_STYPE_ASSOC_RESP:
ieee80211_rx_mgmt_assoc_resp(wpa_s, mgmt, len, rx_status, 0);
break;
case WLAN_FC_STYPE_REASSOC_RESP:
ieee80211_rx_mgmt_assoc_resp(wpa_s, mgmt, len, rx_status, 1);
break;
case WLAN_FC_STYPE_DEAUTH:
ieee80211_rx_mgmt_deauth(wpa_s, mgmt, len, rx_status);
break;
case WLAN_FC_STYPE_DISASSOC:
ieee80211_rx_mgmt_disassoc(wpa_s, mgmt, len, rx_status);
break;
case WLAN_FC_STYPE_ACTION:
ieee80211_rx_mgmt_action(wpa_s, mgmt, len, rx_status);
break;
default:
wpa_printf(MSG_DEBUG, "MLME: received unknown management "
"frame - stype=%d", WLAN_FC_GET_STYPE(fc));
break;
}
}
static void ieee80211_sta_rx_scan(struct wpa_supplicant *wpa_s,
const u8 *buf, size_t len,
struct ieee80211_rx_status *rx_status)
{
struct ieee80211_mgmt *mgmt;
u16 fc;
if (len < 24)
return;
mgmt = (struct ieee80211_mgmt *) buf;
fc = le_to_host16(mgmt->frame_control);
if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT) {
if (WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_PROBE_RESP) {
ieee80211_rx_mgmt_probe_resp(wpa_s, mgmt,
len, rx_status);
} else if (WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON) {
ieee80211_rx_mgmt_beacon(wpa_s, mgmt, len, rx_status);
}
}
}
static int ieee80211_sta_active_ibss(struct wpa_supplicant *wpa_s)
{
int active = 0;
#if 0 /* FIX */
list_for_each(ptr, &local->sta_list) {
sta = list_entry(ptr, struct sta_info, list);
if (sta->dev == dev &&
time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
jiffies)) {
active++;
break;
}
}
#endif
return active;
}
static void ieee80211_sta_expire(struct wpa_supplicant *wpa_s)
{
#if 0 /* FIX */
list_for_each_safe(ptr, n, &local->sta_list) {
sta = list_entry(ptr, struct sta_info, list);
if (time_after(jiffies, sta->last_rx +
IEEE80211_IBSS_INACTIVITY_LIMIT)) {
wpa_printf(MSG_DEBUG, "MLME: expiring inactive STA "
MACSTR, MAC2STR(sta->addr));
sta_info_free(local, sta, 1);
}
}
#endif
}
static void ieee80211_sta_merge_ibss(struct wpa_supplicant *wpa_s)
{
ieee80211_reschedule_timer(wpa_s, IEEE80211_IBSS_MERGE_INTERVAL);
ieee80211_sta_expire(wpa_s);
if (ieee80211_sta_active_ibss(wpa_s))
return;
wpa_printf(MSG_DEBUG, "MLME: No active IBSS STAs - trying to scan for "
"other IBSS networks with same SSID (merge)");
ieee80211_sta_req_scan(wpa_s, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len);
}
static void ieee80211_sta_timer(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
switch (wpa_s->mlme.state) {
case IEEE80211_DISABLED:
break;
case IEEE80211_AUTHENTICATE:
ieee80211_authenticate(wpa_s);
break;
case IEEE80211_ASSOCIATE:
ieee80211_associate(wpa_s);
break;
case IEEE80211_ASSOCIATED:
ieee80211_associated(wpa_s);
break;
case IEEE80211_IBSS_SEARCH:
ieee80211_sta_find_ibss(wpa_s);
break;
case IEEE80211_IBSS_JOINED:
ieee80211_sta_merge_ibss(wpa_s);
break;
default:
wpa_printf(MSG_DEBUG, "ieee80211_sta_timer: Unknown state %d",
wpa_s->mlme.state);
break;
}
if (ieee80211_privacy_mismatch(wpa_s)) {
wpa_printf(MSG_DEBUG, "MLME: privacy configuration mismatch "
"and mixed-cell disabled - disassociate");
ieee80211_send_disassoc(wpa_s, WLAN_REASON_UNSPECIFIED);
ieee80211_set_associated(wpa_s, 0);
}
}
static void ieee80211_sta_new_auth(struct wpa_supplicant *wpa_s)
{
struct wpa_ssid *ssid = wpa_s->current_ssid;
if (ssid && ssid->mode != 0)
return;
#if 0 /* FIX */
if (local->hw->reset_tsf) {
/* Reset own TSF to allow time synchronization work. */
local->hw->reset_tsf(local->mdev);
}
#endif
wpa_s->mlme.wmm_last_param_set = -1; /* allow any WMM update */
if (wpa_s->mlme.auth_algs & IEEE80211_AUTH_ALG_OPEN)
wpa_s->mlme.auth_alg = WLAN_AUTH_OPEN;
else if (wpa_s->mlme.auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
wpa_s->mlme.auth_alg = WLAN_AUTH_SHARED_KEY;
else if (wpa_s->mlme.auth_algs & IEEE80211_AUTH_ALG_LEAP)
wpa_s->mlme.auth_alg = WLAN_AUTH_LEAP;
else
wpa_s->mlme.auth_alg = WLAN_AUTH_OPEN;
wpa_printf(MSG_DEBUG, "MLME: Initial auth_alg=%d",
wpa_s->mlme.auth_alg);
wpa_s->mlme.auth_transaction = -1;
wpa_s->mlme.auth_tries = wpa_s->mlme.assoc_tries = 0;
ieee80211_authenticate(wpa_s);
}
static int ieee80211_ibss_allowed(struct wpa_supplicant *wpa_s)
{
#if 0 /* FIX */
int m, c;
for (m = 0; m < local->hw->num_modes; m++) {
struct ieee80211_hw_modes *mode = &local->hw->modes[m];
if (mode->mode != local->conf.phymode)
continue;
for (c = 0; c < mode->num_channels; c++) {
struct ieee80211_channel *chan = &mode->channels[c];
if (chan->flag & IEEE80211_CHAN_W_SCAN &&
chan->chan == local->conf.channel) {
if (chan->flag & IEEE80211_CHAN_W_IBSS)
return 1;
break;
}
}
}
#endif
return 0;
}
static int ieee80211_sta_join_ibss(struct wpa_supplicant *wpa_s,
struct ieee80211_sta_bss *bss)
{
int res = 0, rates, done = 0;
struct ieee80211_mgmt *mgmt;
#if 0 /* FIX */
struct ieee80211_tx_control control;
struct ieee80211_rate *rate;
struct rate_control_extra extra;
#endif
u8 *pos, *buf;
size_t len;
/* Remove possible STA entries from other IBSS networks. */
#if 0 /* FIX */
sta_info_flush(local, NULL);
if (local->hw->reset_tsf) {
/* Reset own TSF to allow time synchronization work. */
local->hw->reset_tsf(local->mdev);
}
#endif
os_memcpy(wpa_s->bssid, bss->bssid, ETH_ALEN);
#if 0 /* FIX */
local->conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
sdata->drop_unencrypted = bss->capability &
host_to_le16(WLAN_CAPABILITY_PRIVACY) ? 1 : 0;
#endif
#if 0 /* FIX */
os_memset(&rq, 0, sizeof(rq));
rq.m = bss->freq * 100000;
rq.e = 1;
res = ieee80211_ioctl_siwfreq(wpa_s, NULL, &rq, NULL);
#endif
if (!ieee80211_ibss_allowed(wpa_s)) {
#if 0 /* FIX */
wpa_printf(MSG_DEBUG, "MLME: IBSS not allowed on channel %d "
"(%d MHz)", local->conf.channel,
local->conf.freq);
#endif
return -1;
}
/* Set beacon template based on scan results */
buf = os_malloc(400);
len = 0;
do {
if (buf == NULL)
break;
mgmt = (struct ieee80211_mgmt *) buf;
len += 24 + sizeof(mgmt->u.beacon);
os_memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_BEACON);
os_memset(mgmt->da, 0xff, ETH_ALEN);
os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
#if 0 /* FIX */
mgmt->u.beacon.beacon_int =
host_to_le16(local->conf.beacon_int);
#endif
mgmt->u.beacon.capab_info = host_to_le16(bss->capability);
pos = buf + len;
len += 2 + wpa_s->mlme.ssid_len;
*pos++ = WLAN_EID_SSID;
*pos++ = wpa_s->mlme.ssid_len;
os_memcpy(pos, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len);
rates = bss->supp_rates_len;
if (rates > 8)
rates = 8;
pos = buf + len;
len += 2 + rates;
*pos++ = WLAN_EID_SUPP_RATES;
*pos++ = rates;
os_memcpy(pos, bss->supp_rates, rates);
pos = buf + len;
len += 2 + 1;
*pos++ = WLAN_EID_DS_PARAMS;
*pos++ = 1;
*pos++ = bss->channel;
pos = buf + len;
len += 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 = buf + len;
len += 2 + rates;
*pos++ = WLAN_EID_EXT_SUPP_RATES;
*pos++ = rates;
os_memcpy(pos, &bss->supp_rates[8], rates);
}
#if 0 /* FIX */
os_memset(&control, 0, sizeof(control));
control.pkt_type = PKT_PROBE_RESP;
os_memset(&extra, 0, sizeof(extra));
extra.endidx = local->num_curr_rates;
rate = rate_control_get_rate(wpa_s, skb, &extra);
if (rate == NULL) {
wpa_printf(MSG_DEBUG, "MLME: Failed to determine TX "
"rate for IBSS beacon");
break;
}
control.tx_rate = (wpa_s->mlme.short_preamble &&
(rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
rate->val2 : rate->val;
control.antenna_sel = local->conf.antenna_sel;
control.power_level = local->conf.power_level;
control.no_ack = 1;
control.retry_limit = 1;
control.rts_cts_duration = 0;
#endif
#if 0 /* FIX */
wpa_s->mlme.probe_resp = skb_copy(skb, GFP_ATOMIC);
if (wpa_s->mlme.probe_resp) {
mgmt = (struct ieee80211_mgmt *)
wpa_s->mlme.probe_resp->data;
mgmt->frame_control =
IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_PROBE_RESP);
} else {
wpa_printf(MSG_DEBUG, "MLME: Could not allocate "
"ProbeResp template for IBSS");
}
if (local->hw->beacon_update &&
local->hw->beacon_update(wpa_s, skb, &control) == 0) {
wpa_printf(MSG_DEBUG, "MLME: Configured IBSS beacon "
"template based on scan results");
skb = NULL;
}
rates = 0;
for (i = 0; i < bss->supp_rates_len; i++) {
int rate = (bss->supp_rates[i] & 0x7f) * 5;
if (local->conf.phymode == MODE_ATHEROS_TURBO)
rate *= 2;
for (j = 0; j < local->num_curr_rates; j++)
if (local->curr_rates[j].rate == rate)
rates |= BIT(j);
}
wpa_s->mlme.supp_rates_bits = rates;
#endif
done = 1;
} while (0);
os_free(buf);
if (!done) {
wpa_printf(MSG_DEBUG, "MLME: Failed to configure IBSS beacon "
"template");
}
wpa_s->mlme.state = IEEE80211_IBSS_JOINED;
ieee80211_reschedule_timer(wpa_s, IEEE80211_IBSS_MERGE_INTERVAL);
return res;
}
#if 0 /* FIX */
static int ieee80211_sta_create_ibss(struct wpa_supplicant *wpa_s)
{
struct ieee80211_sta_bss *bss;
u8 bssid[ETH_ALEN], *pos;
int i;
#if 0
/* Easier testing, use fixed BSSID. */
os_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. */
os_get_random(bssid, ETH_ALEN);
for (i = 0; i < ETH_ALEN; i++)
bssid[i] ^= wpa_s->own_addr[i];
bssid[0] &= ~0x01;
bssid[0] |= 0x02;
#endif
wpa_printf(MSG_DEBUG, "MLME: Creating new IBSS network, BSSID "
MACSTR "", MAC2STR(bssid));
bss = ieee80211_bss_add(wpa_s, bssid);
if (bss == NULL)
return -ENOMEM;
#if 0 /* FIX */
if (local->conf.beacon_int == 0)
local->conf.beacon_int = 100;
bss->beacon_int = local->conf.beacon_int;
bss->hw_mode = local->conf.phymode;
bss->channel = local->conf.channel;
bss->freq = local->conf.freq;
#endif
os_get_time(&bss->last_update);
bss->capability = host_to_le16(WLAN_CAPABILITY_IBSS);
#if 0 /* FIX */
if (sdata->default_key) {
bss->capability |= host_to_le16(WLAN_CAPABILITY_PRIVACY);
} else
sdata->drop_unencrypted = 0;
bss->supp_rates_len = local->num_curr_rates;
#endif
pos = bss->supp_rates;
#if 0 /* FIX */
for (i = 0; i < local->num_curr_rates; i++) {
int rate = local->curr_rates[i].rate;
if (local->conf.phymode == MODE_ATHEROS_TURBO)
rate /= 2;
*pos++ = (u8) (rate / 5);
}
#endif
return ieee80211_sta_join_ibss(wpa_s, bss);
}
#endif
static int ieee80211_sta_find_ibss(struct wpa_supplicant *wpa_s)
{
struct ieee80211_sta_bss *bss;
int found = 0;
u8 bssid[ETH_ALEN];
int active_ibss;
struct os_time now;
if (wpa_s->mlme.ssid_len == 0)
return -EINVAL;
active_ibss = ieee80211_sta_active_ibss(wpa_s);
#ifdef IEEE80211_IBSS_DEBUG
wpa_printf(MSG_DEBUG, "MLME: sta_find_ibss (active_ibss=%d)",
active_ibss);
#endif /* IEEE80211_IBSS_DEBUG */
for (bss = wpa_s->mlme.sta_bss_list; bss; bss = bss->next) {
if (wpa_s->mlme.ssid_len != bss->ssid_len ||
os_memcmp(wpa_s->mlme.ssid, bss->ssid, bss->ssid_len) != 0
|| !(bss->capability & WLAN_CAPABILITY_IBSS))
continue;
#ifdef IEEE80211_IBSS_DEBUG
wpa_printf(MSG_DEBUG, " bssid=" MACSTR " found",
MAC2STR(bss->bssid));
#endif /* IEEE80211_IBSS_DEBUG */
os_memcpy(bssid, bss->bssid, ETH_ALEN);
found = 1;
if (active_ibss ||
os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)
break;
}
#ifdef IEEE80211_IBSS_DEBUG
wpa_printf(MSG_DEBUG, " sta_find_ibss: selected " MACSTR " current "
MACSTR, MAC2STR(bssid), MAC2STR(wpa_s->bssid));
#endif /* IEEE80211_IBSS_DEBUG */
if (found && os_memcmp(wpa_s->bssid, bssid, ETH_ALEN) != 0 &&
(bss = ieee80211_bss_get(wpa_s, bssid))) {
wpa_printf(MSG_DEBUG, "MLME: Selected IBSS BSSID " MACSTR
" based on configured SSID",
MAC2STR(bssid));
return ieee80211_sta_join_ibss(wpa_s, bss);
}
#ifdef IEEE80211_IBSS_DEBUG
wpa_printf(MSG_DEBUG, " did not try to join ibss");
#endif /* IEEE80211_IBSS_DEBUG */
/* Selected IBSS not found in current scan results - try to scan */
os_get_time(&now);
#if 0 /* FIX */
if (wpa_s->mlme.state == IEEE80211_IBSS_JOINED &&
!ieee80211_sta_active_ibss(wpa_s)) {
ieee80211_reschedule_timer(wpa_s,
IEEE80211_IBSS_MERGE_INTERVAL);
} else if (time_after(jiffies, wpa_s->mlme.last_scan_completed +
IEEE80211_SCAN_INTERVAL)) {
wpa_printf(MSG_DEBUG, "MLME: Trigger new scan to find an IBSS "
"to join");
return ieee80211_sta_req_scan(wpa_s->mlme.ssid,
wpa_s->mlme.ssid_len);
} else if (wpa_s->mlme.state != IEEE80211_IBSS_JOINED) {
int interval = IEEE80211_SCAN_INTERVAL;
if (time_after(jiffies, wpa_s->mlme.ibss_join_req +
IEEE80211_IBSS_JOIN_TIMEOUT)) {
if (wpa_s->mlme.create_ibss &&
ieee80211_ibss_allowed(wpa_s))
return ieee80211_sta_create_ibss(wpa_s);
if (wpa_s->mlme.create_ibss) {
wpa_printf(MSG_DEBUG, "MLME: IBSS not allowed "
"on the configured channel %d "
"(%d MHz)",
local->conf.channel,
local->conf.freq);
}
/* No IBSS found - decrease scan interval and continue
* scanning. */
interval = IEEE80211_SCAN_INTERVAL_SLOW;
}
wpa_s->mlme.state = IEEE80211_IBSS_SEARCH;
ieee80211_reschedule_timer(wpa_s, interval);
return 0;
}
#endif
return 0;
}
int ieee80211_sta_get_ssid(struct wpa_supplicant *wpa_s, u8 *ssid,
size_t *len)
{
os_memcpy(ssid, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len);
*len = wpa_s->mlme.ssid_len;
return 0;
}
int ieee80211_sta_associate(struct wpa_supplicant *wpa_s,
struct wpa_driver_associate_params *params)
{
struct ieee80211_sta_bss *bss;
wpa_s->mlme.bssid_set = 0;
wpa_s->mlme.freq = params->freq;
if (params->bssid) {
os_memcpy(wpa_s->bssid, params->bssid, ETH_ALEN);
if (!is_zero_ether_addr(params->bssid))
wpa_s->mlme.bssid_set = 1;
bss = ieee80211_bss_get(wpa_s, wpa_s->bssid);
if (bss) {
wpa_s->mlme.phymode = bss->hw_mode;
wpa_s->mlme.channel = bss->channel;
wpa_s->mlme.freq = bss->freq;
}
}
#if 0 /* FIX */
/* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
* not defined. */
if (local->hw->conf_tx) {
struct ieee80211_tx_queue_params qparam;
int i;
os_memset(&qparam, 0, sizeof(qparam));
/* TODO: are these ok defaults for all hw_modes? */
qparam.aifs = 2;
qparam.cw_min =
local->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->hw->conf_tx(wpa_s, i + IEEE80211_TX_QUEUE_DATA0,
&qparam);
}
/* IBSS uses different parameters for Beacon sending */
qparam.cw_min++;
qparam.cw_min *= 2;
qparam.cw_min--;
local->hw->conf_tx(wpa_s, IEEE80211_TX_QUEUE_BEACON, &qparam);
}
#endif
if (wpa_s->mlme.ssid_len != params->ssid_len ||
os_memcmp(wpa_s->mlme.ssid, params->ssid, params->ssid_len) != 0)
wpa_s->mlme.prev_bssid_set = 0;
os_memcpy(wpa_s->mlme.ssid, params->ssid, params->ssid_len);
os_memset(wpa_s->mlme.ssid + params->ssid_len, 0,
MAX_SSID_LEN - params->ssid_len);
wpa_s->mlme.ssid_len = params->ssid_len;
wpa_s->mlme.ssid_set = 1;
os_free(wpa_s->mlme.extra_ie);
if (params->wpa_ie == NULL || params->wpa_ie_len == 0) {
wpa_s->mlme.extra_ie = NULL;
wpa_s->mlme.extra_ie_len = 0;
} else {
wpa_s->mlme.extra_ie = os_malloc(params->wpa_ie_len);
if (wpa_s->mlme.extra_ie == NULL) {
wpa_s->mlme.extra_ie_len = 0;
return -1;
}
os_memcpy(wpa_s->mlme.extra_ie, params->wpa_ie,
params->wpa_ie_len);
wpa_s->mlme.extra_ie_len = params->wpa_ie_len;
}
wpa_s->mlme.key_mgmt = params->key_mgmt_suite;
ieee80211_sta_set_channel(wpa_s, wpa_s->mlme.phymode,
wpa_s->mlme.channel, wpa_s->mlme.freq);
if (params->mode == 1 && !wpa_s->mlme.bssid_set) {
os_get_time(&wpa_s->mlme.ibss_join_req);
wpa_s->mlme.state = IEEE80211_IBSS_SEARCH;
return ieee80211_sta_find_ibss(wpa_s);
}
if (wpa_s->mlme.bssid_set)
ieee80211_sta_new_auth(wpa_s);
return 0;
}
static void ieee80211_sta_save_oper_chan(struct wpa_supplicant *wpa_s)
{
wpa_s->mlme.scan_oper_channel = wpa_s->mlme.channel;
wpa_s->mlme.scan_oper_freq = wpa_s->mlme.freq;
wpa_s->mlme.scan_oper_phymode = wpa_s->mlme.phymode;
}
static int ieee80211_sta_restore_oper_chan(struct wpa_supplicant *wpa_s)
{
wpa_s->mlme.channel = wpa_s->mlme.scan_oper_channel;
wpa_s->mlme.freq = wpa_s->mlme.scan_oper_freq;
wpa_s->mlme.phymode = wpa_s->mlme.scan_oper_phymode;
if (wpa_s->mlme.freq == 0)
return 0;
return ieee80211_sta_set_channel(wpa_s, wpa_s->mlme.phymode,
wpa_s->mlme.channel,
wpa_s->mlme.freq);
}
static int ieee80211_active_scan(struct wpa_supplicant *wpa_s)
{
size_t m;
int c;
for (m = 0; m < wpa_s->mlme.num_modes; m++) {
struct wpa_hw_modes *mode = &wpa_s->mlme.modes[m];
if ((int) mode->mode != (int) wpa_s->mlme.phymode)
continue;
for (c = 0; c < mode->num_channels; c++) {
struct wpa_channel_data *chan = &mode->channels[c];
if (chan->flag & WPA_CHAN_W_SCAN &&
chan->chan == wpa_s->mlme.channel) {
if (chan->flag & WPA_CHAN_W_ACTIVE_SCAN)
return 1;
break;
}
}
}
return 0;
}
static void ieee80211_sta_scan_timer(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
struct wpa_hw_modes *mode;
struct wpa_channel_data *chan;
int skip = 0;
int timeout = 0;
struct wpa_ssid *ssid = wpa_s->current_ssid;
int adhoc;
if (!wpa_s->mlme.sta_scanning || wpa_s->mlme.modes == NULL)
return;
adhoc = ssid && ssid->mode == 1;
switch (wpa_s->mlme.scan_state) {
case SCAN_SET_CHANNEL:
mode = &wpa_s->mlme.modes[wpa_s->mlme.scan_hw_mode_idx];
if (wpa_s->mlme.scan_hw_mode_idx >=
(int) wpa_s->mlme.num_modes ||
(wpa_s->mlme.scan_hw_mode_idx + 1 ==
(int) wpa_s->mlme.num_modes
&& wpa_s->mlme.scan_channel_idx >= mode->num_channels)) {
if (ieee80211_sta_restore_oper_chan(wpa_s)) {
wpa_printf(MSG_DEBUG, "MLME: failed to "
"restore operational channel after "
"scan");
}
wpa_printf(MSG_DEBUG, "MLME: scan completed");
wpa_s->mlme.sta_scanning = 0;
os_get_time(&wpa_s->mlme.last_scan_completed);
wpa_supplicant_event(wpa_s, EVENT_SCAN_RESULTS, NULL);
if (adhoc) {
if (!wpa_s->mlme.bssid_set ||
(wpa_s->mlme.state ==
IEEE80211_IBSS_JOINED &&
!ieee80211_sta_active_ibss(wpa_s)))
ieee80211_sta_find_ibss(wpa_s);
}
return;
}
skip = !(wpa_s->mlme.hw_modes & (1 << mode->mode));
chan = &mode->channels[wpa_s->mlme.scan_channel_idx];
if (!(chan->flag & WPA_CHAN_W_SCAN) ||
(adhoc && !(chan->flag & WPA_CHAN_W_IBSS)) ||
(wpa_s->mlme.hw_modes & (1 << WPA_MODE_IEEE80211G) &&
mode->mode == WPA_MODE_IEEE80211B &&
wpa_s->mlme.scan_skip_11b))
skip = 1;
if (!skip) {
wpa_printf(MSG_MSGDUMP,
"MLME: scan channel %d (%d MHz)",
chan->chan, chan->freq);
wpa_s->mlme.channel = chan->chan;
wpa_s->mlme.freq = chan->freq;
wpa_s->mlme.phymode = mode->mode;
if (ieee80211_sta_set_channel(wpa_s, mode->mode,
chan->chan, chan->freq))
{
wpa_printf(MSG_DEBUG, "MLME: failed to set "
"channel %d (%d MHz) for scan",
chan->chan, chan->freq);
skip = 1;
}
}
wpa_s->mlme.scan_channel_idx++;
if (wpa_s->mlme.scan_channel_idx >=
wpa_s->mlme.modes[wpa_s->mlme.scan_hw_mode_idx].
num_channels) {
wpa_s->mlme.scan_hw_mode_idx++;
wpa_s->mlme.scan_channel_idx = 0;
}
if (skip) {
timeout = 0;
break;
}
timeout = IEEE80211_PROBE_DELAY;
wpa_s->mlme.scan_state = SCAN_SEND_PROBE;
break;
case SCAN_SEND_PROBE:
if (ieee80211_active_scan(wpa_s)) {
ieee80211_send_probe_req(wpa_s, NULL,
wpa_s->mlme.scan_ssid,
wpa_s->mlme.scan_ssid_len);
timeout = IEEE80211_CHANNEL_TIME;
} else {
timeout = IEEE80211_PASSIVE_CHANNEL_TIME;
}
wpa_s->mlme.scan_state = SCAN_SET_CHANNEL;
break;
}
eloop_register_timeout(timeout / 1000, 1000 * (timeout % 1000),
ieee80211_sta_scan_timer, wpa_s, NULL);
}
int ieee80211_sta_req_scan(struct wpa_supplicant *wpa_s, const u8 *ssid,
size_t ssid_len)
{
if (ssid_len > MAX_SSID_LEN)
return -1;
/* 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
*/
/* TODO: if assoc, move to power save mode for the duration of the
* scan */
if (wpa_s->mlme.sta_scanning)
return -1;
wpa_printf(MSG_DEBUG, "MLME: starting scan");
ieee80211_sta_save_oper_chan(wpa_s);
wpa_s->mlme.sta_scanning = 1;
/* TODO: stop TX queue? */
if (ssid) {
wpa_s->mlme.scan_ssid_len = ssid_len;
os_memcpy(wpa_s->mlme.scan_ssid, ssid, ssid_len);
} else
wpa_s->mlme.scan_ssid_len = 0;
wpa_s->mlme.scan_skip_11b = 1; /* FIX: clear this is 11g is not
* supported */
wpa_s->mlme.scan_state = SCAN_SET_CHANNEL;
wpa_s->mlme.scan_hw_mode_idx = 0;
wpa_s->mlme.scan_channel_idx = 0;
eloop_register_timeout(0, 1, ieee80211_sta_scan_timer, wpa_s, NULL);
return 0;
}
struct wpa_scan_results *
ieee80211_sta_get_scan_results(struct wpa_supplicant *wpa_s)
{
size_t ap_num = 0;
struct wpa_scan_results *res;
struct wpa_scan_res *r;
struct ieee80211_sta_bss *bss;
res = os_zalloc(sizeof(*res));
for (bss = wpa_s->mlme.sta_bss_list; bss; bss = bss->next)
ap_num++;
res->res = os_zalloc(ap_num * sizeof(struct wpa_scan_res *));
if (res->res == NULL) {
os_free(res);
return NULL;
}
for (bss = wpa_s->mlme.sta_bss_list; bss; bss = bss->next) {
r = os_zalloc(sizeof(*r) + bss->ie_len);
if (r == NULL)
break;
os_memcpy(r->bssid, bss->bssid, ETH_ALEN);
r->freq = bss->freq;
r->beacon_int = bss->beacon_int;
r->caps = bss->capability;
r->level = bss->rssi;
r->tsf = bss->timestamp;
if (bss->ie) {
r->ie_len = bss->ie_len;
os_memcpy(r + 1, bss->ie, bss->ie_len);
}
res->res[res->num++] = r;
}
return res;
}
#if 0 /* FIX */
struct sta_info * ieee80211_ibss_add_sta(struct wpa_supplicant *wpa_s,
struct sk_buff *skb, u8 *bssid,
u8 *addr)
{
struct ieee80211_local *local = dev->priv;
struct list_head *ptr;
struct sta_info *sta;
struct wpa_supplicant *sta_dev = NULL;
/* 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()) {
wpa_printf(MSG_DEBUG, "MLME: No room for a new IBSS "
"STA entry " MACSTR, MAC2STR(addr));
}
return NULL;
}
spin_lock_bh(&local->sub_if_lock);
list_for_each(ptr, &local->sub_if_list) {
sdata = list_entry(ptr, struct ieee80211_sub_if_data, list);
if (sdata->type == IEEE80211_SUB_IF_TYPE_STA &&
os_memcmp(bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
sta_dev = sdata->dev;
break;
}
}
spin_unlock_bh(&local->sub_if_lock);
if (sta_dev == NULL)
return NULL;
wpa_printf(MSG_DEBUG, "MLME: Adding new IBSS station " MACSTR
" (dev=%s)", MAC2STR(addr), sta_dev->name);
sta = sta_info_add(wpa_s, addr);
if (sta == NULL) {
return NULL;
}
sta->dev = sta_dev;
sta->supp_rates = wpa_s->mlme.supp_rates_bits;
rate_control_rate_init(local, sta);
return sta; /* caller will call sta_info_release() */
}
#endif
int ieee80211_sta_deauthenticate(struct wpa_supplicant *wpa_s, u16 reason)
{
wpa_printf(MSG_DEBUG, "MLME: deauthenticate(reason=%d)", reason);
ieee80211_send_deauth(wpa_s, reason);
ieee80211_set_associated(wpa_s, 0);
return 0;
}
int ieee80211_sta_disassociate(struct wpa_supplicant *wpa_s, u16 reason)
{
wpa_printf(MSG_DEBUG, "MLME: disassociate(reason=%d)", reason);
if (!wpa_s->mlme.associated)
return -1;
ieee80211_send_disassoc(wpa_s, reason);
ieee80211_set_associated(wpa_s, 0);
return 0;
}
void ieee80211_sta_rx(struct wpa_supplicant *wpa_s, const u8 *buf, size_t len,
struct ieee80211_rx_status *rx_status)
{
struct ieee80211_mgmt *mgmt;
u16 fc;
const u8 *pos;
/* wpa_hexdump(MSG_MSGDUMP, "MLME: Received frame", buf, len); */
if (wpa_s->mlme.sta_scanning) {
ieee80211_sta_rx_scan(wpa_s, buf, len, rx_status);
return;
}
if (len < 24)
return;
mgmt = (struct ieee80211_mgmt *) buf;
fc = le_to_host16(mgmt->frame_control);
if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT)
ieee80211_sta_rx_mgmt(wpa_s, buf, len, rx_status);
else if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_DATA) {
if ((fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) !=
WLAN_FC_FROMDS)
return;
/* mgmt->sa is actually BSSID for FromDS data frames */
if (os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0)
return;
/* Skip IEEE 802.11 and LLC headers */
pos = buf + 24 + 6;
if (WPA_GET_BE16(pos) != ETH_P_EAPOL)
return;
pos += 2;
/* mgmt->bssid is actually BSSID for SA data frames */
wpa_supplicant_rx_eapol(wpa_s, mgmt->bssid,
pos, buf + len - pos);
}
}
void ieee80211_sta_free_hw_features(struct wpa_hw_modes *hw_features,
size_t num_hw_features)
{
size_t i;
if (hw_features == NULL)
return;
for (i = 0; i < num_hw_features; i++) {
os_free(hw_features[i].channels);
os_free(hw_features[i].rates);
}
os_free(hw_features);
}
int ieee80211_sta_init(struct wpa_supplicant *wpa_s)
{
u16 num_modes, flags;
wpa_s->mlme.modes = wpa_drv_get_hw_feature_data(wpa_s, &num_modes,
&flags);
if (wpa_s->mlme.modes == NULL) {
wpa_printf(MSG_ERROR, "MLME: Failed to read supported "
"channels and rates from the driver");
return -1;
}
wpa_s->mlme.num_modes = num_modes;
wpa_s->mlme.hw_modes = 1 << WPA_MODE_IEEE80211A;
wpa_s->mlme.hw_modes |= 1 << WPA_MODE_IEEE80211B;
wpa_s->mlme.hw_modes |= 1 << WPA_MODE_IEEE80211G;
return 0;
}
void ieee80211_sta_deinit(struct wpa_supplicant *wpa_s)
{
eloop_cancel_timeout(ieee80211_sta_timer, wpa_s, NULL);
eloop_cancel_timeout(ieee80211_sta_scan_timer, wpa_s, NULL);
os_free(wpa_s->mlme.extra_ie);
wpa_s->mlme.extra_ie = NULL;
os_free(wpa_s->mlme.extra_probe_ie);
wpa_s->mlme.extra_probe_ie = NULL;
os_free(wpa_s->mlme.assocreq_ies);
wpa_s->mlme.assocreq_ies = NULL;
os_free(wpa_s->mlme.assocresp_ies);
wpa_s->mlme.assocresp_ies = NULL;
ieee80211_bss_list_deinit(wpa_s);
ieee80211_sta_free_hw_features(wpa_s->mlme.modes,
wpa_s->mlme.num_modes);
#ifdef CONFIG_IEEE80211R
os_free(wpa_s->mlme.ft_ies);
wpa_s->mlme.ft_ies = NULL;
wpa_s->mlme.ft_ies_len = 0;
#endif /* CONFIG_IEEE80211R */
}
#ifdef CONFIG_IEEE80211R
int ieee80211_sta_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
const u8 *ies, size_t ies_len)
{
if (md == NULL) {
wpa_printf(MSG_DEBUG, "MLME: Clear FT mobility domain");
os_memset(wpa_s->mlme.current_md, 0, MOBILITY_DOMAIN_ID_LEN);
} else {
wpa_printf(MSG_DEBUG, "MLME: Update FT IEs for MD " MACSTR,
MAC2STR(md));
os_memcpy(wpa_s->mlme.current_md, md, MOBILITY_DOMAIN_ID_LEN);
}
wpa_hexdump(MSG_DEBUG, "MLME: FT IEs", ies, ies_len);
os_free(wpa_s->mlme.ft_ies);
wpa_s->mlme.ft_ies = os_malloc(ies_len);
if (wpa_s->mlme.ft_ies == NULL)
return -1;
os_memcpy(wpa_s->mlme.ft_ies, ies, ies_len);
wpa_s->mlme.ft_ies_len = ies_len;
return 0;
}
int ieee80211_sta_send_ft_action(struct wpa_supplicant *wpa_s, u8 action,
const u8 *target_ap,
const u8 *ies, size_t ies_len)
{
u8 *buf;
size_t len;
struct ieee80211_mgmt *mgmt;
int res;
/*
* Action frame payload:
* Category[1] = 6 (Fast BSS Transition)
* Action[1] = 1 (Fast BSS Transition Request)
* STA Address
* Target AP Address
* FT IEs
*/
buf = os_zalloc(sizeof(*mgmt) + ies_len);
if (buf == NULL) {
wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
"FT action frame");
return -1;
}
mgmt = (struct ieee80211_mgmt *) buf;
len = 24;
os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_ACTION);
mgmt->u.action.category = WLAN_ACTION_FT;
mgmt->u.action.u.ft_action_req.action = action;
os_memcpy(mgmt->u.action.u.ft_action_req.sta_addr, wpa_s->own_addr,
ETH_ALEN);
os_memcpy(mgmt->u.action.u.ft_action_req.target_ap_addr, target_ap,
ETH_ALEN);
os_memcpy(mgmt->u.action.u.ft_action_req.variable, ies, ies_len);
len += 1 + sizeof(mgmt->u.action.u.ft_action_req) + ies_len;
wpa_printf(MSG_DEBUG, "MLME: Send FT Action Frame: Action=%d "
"Target AP=" MACSTR " body_len=%d",
action, MAC2STR(target_ap), ies_len);
res = ieee80211_sta_tx(wpa_s, buf, len);
os_free(buf);
return res;
}
#endif /* CONFIG_IEEE80211R */
int ieee80211_sta_set_probe_req_ie(struct wpa_supplicant *wpa_s, const u8 *ies,
size_t ies_len)
{
os_free(wpa_s->mlme.extra_probe_ie);
wpa_s->mlme.extra_probe_ie = NULL;
wpa_s->mlme.extra_probe_ie_len = 0;
if (ies == NULL)
return 0;
wpa_s->mlme.extra_probe_ie = os_malloc(ies_len);
if (wpa_s->mlme.extra_probe_ie == NULL)
return -1;
os_memcpy(wpa_s->mlme.extra_probe_ie, ies, ies_len);
wpa_s->mlme.extra_probe_ie_len = ies_len;
return 0;
}
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