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hostap/wpa_supplicant/mlme.c
Jouni Malinen ed843aaa33 WMM-AC: Fix hostapd processing of ADDTS Request and add test code 
Calculate the estimated medium time using integer variables since there
is no real need to use floating point arithmetics here. In addition,
make sure there is no division by zero regardless of how invalid the
request from the station is. Reject invalid parameters and refuse
requests that would take most of the bandwidth by themselves.

Add test code into wpa_supplicant mlme.c to allow WMM-AC negotiation to
be tested with driver_test.
2009-03-06 20:15:00 +02:00

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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 "ieee802_11_common.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);
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);
}
static int ecw2cw(int ecw)
{
int cw = 1;
while (ecw > 0) {
cw <<= 1;
ecw--;
}
return cw - 1;
}
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;
u8 wmm_acm;
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;
wmm_acm = 0;
for (; left >= 4; left -= 4, pos += 4) {
int aci = (pos[0] >> 5) & 0x03;
int acm = (pos[0] >> 4) & 0x01;
int aifs, cw_max, cw_min, burst_time;
switch (aci) {
case 1: /* AC_BK */
if (acm)
wmm_acm |= BIT(1) | BIT(2); /* BK/- */
break;
case 2: /* AC_VI */
if (acm)
wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
break;
case 3: /* AC_VO */
if (acm)
wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
break;
case 0: /* AC_BE */
default:
if (acm)
wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
break;
}
aifs = pos[0] & 0x0f;
cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
cw_min = ecw2cw(pos[1] & 0x0f);
/* TXOP is in units of 32 usec; burst_time in 0.1 ms */
burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
wpa_printf(MSG_DEBUG, "MLME: WMM aci=%d acm=%d aifs=%d "
"cWmin=%d cWmax=%d burst=%d",
aci, acm, aifs, cw_min, cw_max, burst_time);
/* TODO: driver configuration */
}
}
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; /* WMM */
*pos++ = 0; /* WMM info */
*pos++ = 1; /* WMM 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, 0)
== 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_tx_addts(struct wpa_supplicant *wpa_s)
{
struct wpabuf *buf;
struct ieee80211_mgmt *mgmt;
struct wmm_tspec_element *tspec;
size_t alen;
int tid, up;
wpa_printf(MSG_DEBUG, "MLME: Send ADDTS Request for Voice TSPEC");
mgmt = NULL;
alen = mgmt->u.action.u.wmm_action.variable - (u8 *) mgmt;
buf = wpabuf_alloc(alen + sizeof(*tspec));
if (buf == NULL)
return;
mgmt = wpabuf_put(buf, alen);
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_WMM;
mgmt->u.action.u.wmm_action.action_code = WMM_ACTION_CODE_ADDTS_REQ;
mgmt->u.action.u.wmm_action.dialog_token = 1;
mgmt->u.action.u.wmm_action.status_code = 0;
tspec = wpabuf_put(buf, sizeof(*tspec));
tspec->eid = WLAN_EID_VENDOR_SPECIFIC;
tspec->length = sizeof(*tspec) - 2;
tspec->oui[0] = 0x00;
tspec->oui[1] = 0x50;
tspec->oui[2] = 0xf2;
tspec->oui_type = 2;
tspec->oui_subtype = 2;
tspec->version = 1;
tid = 1;
up = 6; /* Voice */
tspec->ts_info[0] = (tid << 1) |
(WMM_TSPEC_DIRECTION_BI_DIRECTIONAL << 5) |
BIT(7);
tspec->ts_info[1] = up << 3;
tspec->nominal_msdu_size = host_to_le16(1530);
tspec->mean_data_rate = host_to_le32(128000); /* bits per second */
tspec->minimum_phy_rate = host_to_le32(6000000);
tspec->surplus_bandwidth_allowance = host_to_le16(0x3000); /* 150% */
ieee80211_sta_tx(wpa_s, wpabuf_head(buf), wpabuf_len(buf));
wpabuf_free(buf);
}
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, 0)
== 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.timeout_int && elems.timeout_int_len == 5 &&
elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
u32 tu, ms;
tu = WPA_GET_LE32(elems.timeout_int + 1);
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 (elems.wmm && wpa_s->mlme.wmm_enabled)
ieee80211_sta_wmm_params(wpa_s, elems.wmm, elems.wmm_len);
ieee80211_associated(wpa_s);
if (os_strcmp(wpa_s->driver->name, "test") == 0 &&
elems.wmm && wpa_s->mlme.wmm_enabled) {
/* Test WMM-AC - send ADDTS for WMM TSPEC */
ieee80211_tx_addts(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, 0) == 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_ie &&
(bss->wpa_ie == NULL || bss->wpa_ie_len != elems.wpa_ie_len ||
os_memcmp(bss->wpa_ie, elems.wpa_ie, elems.wpa_ie_len))) {
os_free(bss->wpa_ie);
bss->wpa_ie = os_malloc(elems.wpa_ie_len + 2);
if (bss->wpa_ie) {
os_memcpy(bss->wpa_ie, elems.wpa_ie - 2,
elems.wpa_ie_len + 2);
bss->wpa_ie_len = elems.wpa_ie_len + 2;
} else
bss->wpa_ie_len = 0;
} else if (!elems.wpa_ie && bss->wpa_ie) {
os_free(bss->wpa_ie);
bss->wpa_ie = NULL;
bss->wpa_ie_len = 0;
}
if (elems.rsn_ie &&
(bss->rsn_ie == NULL || bss->rsn_ie_len != elems.rsn_ie_len ||
os_memcmp(bss->rsn_ie, elems.rsn_ie, elems.rsn_ie_len))) {
os_free(bss->rsn_ie);
bss->rsn_ie = os_malloc(elems.rsn_ie_len + 2);
if (bss->rsn_ie) {
os_memcpy(bss->rsn_ie, elems.rsn_ie - 2,
elems.rsn_ie_len + 2);
bss->rsn_ie_len = elems.rsn_ie_len + 2;
} else
bss->rsn_ie_len = 0;
} else if (!elems.rsn_ie && bss->rsn_ie) {
os_free(bss->rsn_ie);
bss->rsn_ie = NULL;
bss->rsn_ie_len = 0;
}
if (elems.wmm &&
(bss->wmm_ie == NULL || bss->wmm_ie_len != elems.wmm_len ||
os_memcmp(bss->wmm_ie, elems.wmm, elems.wmm_len))) {
os_free(bss->wmm_ie);
bss->wmm_ie = os_malloc(elems.wmm_len + 2);
if (bss->wmm_ie) {
os_memcpy(bss->wmm_ie, elems.wmm - 2,
elems.wmm_len + 2);
bss->wmm_ie_len = elems.wmm_len + 2;
} else
bss->wmm_ie_len = 0;
} else if (!elems.wmm && 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, 0) == 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 && wpa_s->mlme.wmm_enabled) {
ieee80211_sta_wmm_params(wpa_s, elems.wmm,
elems.wmm_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-SAQuery.response */
static int ieee80211_sta_send_sa_query_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 "
"SA Query 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_SA_QUERY;
mgmt->u.action.u.sa_query_resp.action = WLAN_SA_QUERY_RESPONSE;
os_memcpy(mgmt->u.action.u.sa_query_resp.trans_id, trans_id,
WLAN_SA_QUERY_TR_ID_LEN);
len += 1 + sizeof(mgmt->u.action.u.sa_query_resp);
res = ieee80211_sta_tx(wpa_s, (u8 *) mgmt, len);
os_free(mgmt);
return res;
}
static void ieee80211_rx_mgmt_sa_query_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.sa_query_req)) {
wpa_printf(MSG_DEBUG, "MLME: Too short SA Query Action frame");
return;
}
if (mgmt->u.action.u.sa_query_req.action != WLAN_SA_QUERY_REQUEST) {
wpa_printf(MSG_DEBUG, "MLME: Unexpected SA Query Action %d",
mgmt->u.action.u.sa_query_req.action);
return;
}
if (os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "MLME: Ignore SA Query from unknown "
"source " MACSTR, MAC2STR(mgmt->sa));
return;
}
if (wpa_s->mlme.state == IEEE80211_ASSOCIATE) {
wpa_printf(MSG_DEBUG, "MLME: Ignore SA query request during "
"association process");
return;
}
wpa_printf(MSG_DEBUG, "MLME: Replying to SA Query request");
ieee80211_sta_send_sa_query_resp(wpa_s, mgmt->sa, mgmt->u.action.u.
sa_query_req.trans_id);
}
#endif /* CONFIG_IEEE80211W */
static void dump_tspec(struct wmm_tspec_element *tspec)
{
int up, psb, dir, tid;
u16 val;
up = (tspec->ts_info[1] >> 3) & 0x07;
psb = (tspec->ts_info[1] >> 2) & 0x01;
dir = (tspec->ts_info[0] >> 5) & 0x03;
tid = (tspec->ts_info[0] >> 1) & 0x0f;
wpa_printf(MSG_DEBUG, "WMM: TS Info: UP=%d PSB=%d Direction=%d TID=%d",
up, psb, dir, tid);
val = le_to_host16(tspec->nominal_msdu_size);
wpa_printf(MSG_DEBUG, "WMM: Nominal MSDU Size: %d%s",
val & 0x7fff, val & 0x8000 ? " (fixed)" : "");
wpa_printf(MSG_DEBUG, "WMM: Mean Data Rate: %u bps",
le_to_host32(tspec->mean_data_rate));
wpa_printf(MSG_DEBUG, "WMM: Minimum PHY Rate: %u bps",
le_to_host32(tspec->minimum_phy_rate));
val = le_to_host16(tspec->surplus_bandwidth_allowance);
wpa_printf(MSG_DEBUG, "WMM: Surplus Bandwidth Allowance: %u.%04u",
val >> 13, 10000 * (val & 0x1fff) / 0x2000);
val = le_to_host16(tspec->medium_time);
wpa_printf(MSG_DEBUG, "WMM: Medium Time: %u (= %u usec/sec)",
val, 32 * val);
}
static int is_wmm_tspec(const u8 *ie, size_t len)
{
const struct wmm_tspec_element *tspec;
if (len < sizeof(*tspec))
return 0;
tspec = (const struct wmm_tspec_element *) ie;
if (tspec->eid != WLAN_EID_VENDOR_SPECIFIC ||
tspec->length < sizeof(*tspec) - 2 ||
tspec->oui[0] != 0x00 || tspec->oui[1] != 0x50 ||
tspec->oui[2] != 0xf2 || tspec->oui_type != 2 ||
tspec->oui_subtype != 2 || tspec->version != 1)
return 0;
return 1;
}
static void ieee80211_rx_addts_resp(
struct wpa_supplicant *wpa_s, struct ieee80211_mgmt *mgmt, size_t len,
size_t var_len)
{
struct wmm_tspec_element *tspec;
wpa_printf(MSG_DEBUG, "WMM: Received ADDTS Response");
wpa_hexdump(MSG_MSGDUMP, "WMM: ADDTS Response IE(s)",
mgmt->u.action.u.wmm_action.variable, var_len);
if (!is_wmm_tspec(mgmt->u.action.u.wmm_action.variable, var_len))
return;
tspec = (struct wmm_tspec_element *)
mgmt->u.action.u.wmm_action.variable;
dump_tspec(tspec);
}
static void ieee80211_rx_delts(
struct wpa_supplicant *wpa_s, struct ieee80211_mgmt *mgmt, size_t len,
size_t var_len)
{
struct wmm_tspec_element *tspec;
wpa_printf(MSG_DEBUG, "WMM: Received DELTS");
wpa_hexdump(MSG_MSGDUMP, "WMM: DELTS IE(s)",
mgmt->u.action.u.wmm_action.variable, var_len);
if (!is_wmm_tspec(mgmt->u.action.u.wmm_action.variable, var_len))
return;
tspec = (struct wmm_tspec_element *)
mgmt->u.action.u.wmm_action.variable;
dump_tspec(tspec);
}
static void ieee80211_rx_mgmt_wmm_action(
struct wpa_supplicant *wpa_s, struct ieee80211_mgmt *mgmt, size_t len,
struct ieee80211_rx_status *rx_status)
{
size_t alen;
alen = mgmt->u.action.u.wmm_action.variable - (u8 *) mgmt;
if (len < alen) {
wpa_printf(MSG_DEBUG, "WMM: Received Action frame too short");
return;
}
wpa_printf(MSG_DEBUG, "WMM: Received Action frame: Action Code %d, "
"Dialog Token %d, Status Code %d",
mgmt->u.action.u.wmm_action.action_code,
mgmt->u.action.u.wmm_action.dialog_token,
mgmt->u.action.u.wmm_action.status_code);
switch (mgmt->u.action.u.wmm_action.action_code) {
case WMM_ACTION_CODE_ADDTS_RESP:
ieee80211_rx_addts_resp(wpa_s, mgmt, len, len - alen);
break;
case WMM_ACTION_CODE_DELTS:
ieee80211_rx_delts(wpa_s, mgmt, len, len - alen);
break;
default:
wpa_printf(MSG_DEBUG, "WMM: Unsupported Action Code %d",
mgmt->u.action.u.wmm_action.action_code);
break;
}
}
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 */
#ifdef CONFIG_IEEE80211W
case WLAN_ACTION_SA_QUERY:
ieee80211_rx_mgmt_sa_query_action(wpa_s, mgmt, len, rx_status);
break;
#endif /* CONFIG_IEEE80211W */
case WLAN_ACTION_WMM:
ieee80211_rx_mgmt_wmm_action(wpa_s, mgmt, len, rx_status);
break;
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;
wpa_s->mlme.wmm_enabled = 1;
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=%lu",
action, MAC2STR(target_ap), (unsigned long) 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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