/* Copyright (C) 2006, Red Hat, Inc. */
#include <linux/bitops.h>
#include <net/ieee80211.h>
#include "assoc.h"
#include "join.h"
#include "decl.h"
#include "hostcmd.h"
#include "host.h"
static const u8 bssid_any[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
static const u8 bssid_off[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static int assoc_helper_essid(wlan_private *priv,
struct assoc_request * assoc_req)
{
wlan_adapter *adapter = priv->adapter;
int ret = 0;
int i;
lbs_deb_enter(LBS_DEB_ASSOC);
lbs_deb_assoc("New SSID requested: %s\n", assoc_req->ssid.ssid);
if (assoc_req->mode == IW_MODE_INFRA) {
if (adapter->prescan) {
libertas_send_specific_SSID_scan(priv, &assoc_req->ssid, 1);
}
i = libertas_find_SSID_in_list(adapter, &assoc_req->ssid,
NULL, IW_MODE_INFRA);
if (i >= 0) {
lbs_deb_assoc(
"SSID found in scan list ... associating...\n");
ret = wlan_associate(priv, &adapter->scantable[i]);
if (ret == 0) {
memcpy(&assoc_req->bssid,
&adapter->scantable[i].macaddress,
ETH_ALEN);
}
} else {
lbs_deb_assoc("SSID '%s' not found; cannot associate\n",
assoc_req->ssid.ssid);
}
} else if (assoc_req->mode == IW_MODE_ADHOC) {
/* Scan for the network, do not save previous results. Stale
* scan data will cause us to join a non-existant adhoc network
*/
libertas_send_specific_SSID_scan(priv, &assoc_req->ssid, 0);
/* Search for the requested SSID in the scan table */
i = libertas_find_SSID_in_list(adapter, &assoc_req->ssid, NULL,
IW_MODE_ADHOC);
if (i >= 0) {
lbs_deb_assoc("SSID found at %d in List, so join\n", ret);
libertas_join_adhoc_network(priv, &adapter->scantable[i]);
} else {
/* else send START command */
lbs_deb_assoc("SSID not found in list, so creating adhoc"
" with SSID '%s'\n", assoc_req->ssid.ssid);
libertas_start_adhoc_network(priv, &assoc_req->ssid);
}
memcpy(&assoc_req->bssid, &adapter->current_addr, ETH_ALEN);
}
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_bssid(wlan_private *priv,
struct assoc_request * assoc_req)
{
wlan_adapter *adapter = priv->adapter;
int i, ret = 0;
lbs_deb_enter_args(LBS_DEB_ASSOC, "BSSID" MAC_FMT "\n",
MAC_ARG(assoc_req->bssid));
/* Search for index position in list for requested MAC */
i = libertas_find_BSSID_in_list(adapter, assoc_req->bssid,
assoc_req->mode);
if (i < 0) {
lbs_deb_assoc("ASSOC: WAP: BSSID " MAC_FMT " not found, "
"cannot associate.\n", MAC_ARG(assoc_req->bssid));
goto out;
}
if (assoc_req->mode == IW_MODE_INFRA) {
ret = wlan_associate(priv, &adapter->scantable[i]);
lbs_deb_assoc("ASSOC: return from wlan_associate(bssd) was %d\n", ret);
} else if (assoc_req->mode == IW_MODE_ADHOC) {
libertas_join_adhoc_network(priv, &adapter->scantable[i]);
}
memcpy(&assoc_req->ssid, &adapter->scantable[i].ssid,
sizeof(struct WLAN_802_11_SSID));
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_associate(wlan_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0, done = 0;
/* If we're given and 'any' BSSID, try associating based on SSID */
if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
if (memcmp(bssid_any, assoc_req->bssid, ETH_ALEN)
&& memcmp(bssid_off, assoc_req->bssid, ETH_ALEN)) {
ret = assoc_helper_bssid(priv, assoc_req);
done = 1;
if (ret) {
lbs_deb_assoc("ASSOC: bssid: ret = %d\n", ret);
}
}
}
if (!done && test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
ret = assoc_helper_essid(priv, assoc_req);
if (ret) {
lbs_deb_assoc("ASSOC: bssid: ret = %d\n", ret);
}
}
return ret;
}
static int assoc_helper_mode(wlan_private *priv,
struct assoc_request * assoc_req)
{
wlan_adapter *adapter = priv->adapter;
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
if (assoc_req->mode == adapter->mode)
goto done;
if (assoc_req->mode == IW_MODE_INFRA) {
if (adapter->psstate != PS_STATE_FULL_POWER)
libertas_ps_wakeup(priv, cmd_option_waitforrsp);
adapter->psmode = wlan802_11powermodecam;
}
adapter->mode = assoc_req->mode;
ret = libertas_prepare_and_send_command(priv,
cmd_802_11_snmp_mib,
0, cmd_option_waitforrsp,
OID_802_11_INFRASTRUCTURE_MODE,
(void *) (size_t) assoc_req->mode);
done:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_wep_keys(wlan_private *priv,
struct assoc_request * assoc_req)
{
wlan_adapter *adapter = priv->adapter;
int i;
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
/* Set or remove WEP keys */
if ( assoc_req->wep_keys[0].len
|| assoc_req->wep_keys[1].len
|| assoc_req->wep_keys[2].len
|| assoc_req->wep_keys[3].len) {
ret = libertas_prepare_and_send_command(priv,
cmd_802_11_set_wep,
cmd_act_add,
cmd_option_waitforrsp,
0, assoc_req);
} else {
ret = libertas_prepare_and_send_command(priv,
cmd_802_11_set_wep,
cmd_act_remove,
cmd_option_waitforrsp,
0, NULL);
}
if (ret)
goto out;
/* enable/disable the MAC's WEP packet filter */
if (assoc_req->secinfo.wep_enabled)
adapter->currentpacketfilter |= cmd_act_mac_wep_enable;
else
adapter->currentpacketfilter &= ~cmd_act_mac_wep_enable;
ret = libertas_set_mac_packet_filter(priv);
if (ret)
goto out;
mutex_lock(&adapter->lock);
/* Copy WEP keys into adapter wep key fields */
for (i = 0; i < 4; i++) {
memcpy(&adapter->wep_keys[i], &assoc_req->wep_keys[i],
sizeof(struct WLAN_802_11_KEY));
}
adapter->wep_tx_keyidx = assoc_req->wep_tx_keyidx;
mutex_unlock(&adapter->lock);
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_secinfo(wlan_private *priv,
struct assoc_request * assoc_req)
{
wlan_adapter *adapter = priv->adapter;
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
memcpy(&adapter->secinfo, &assoc_req->secinfo,
sizeof(struct wlan_802_11_security));
ret = libertas_set_mac_packet_filter(priv);
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_wpa_keys(wlan_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
/* enable/Disable RSN */
ret = libertas_prepare_and_send_command(priv,
cmd_802_11_enable_rsn,
cmd_act_set,
cmd_option_waitforrsp,
0, assoc_req);
if (ret)
goto out;
ret = libertas_prepare_and_send_command(priv,
cmd_802_11_key_material,
cmd_act_set,
cmd_option_waitforrsp,
0, assoc_req);
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_wpa_ie(wlan_private *priv,
struct assoc_request * assoc_req)
{
wlan_adapter *adapter = priv->adapter;
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) {
memcpy(&adapter->wpa_ie, &assoc_req->wpa_ie, assoc_req->wpa_ie_len);
adapter->wpa_ie_len = assoc_req->wpa_ie_len;
} else {
memset(&adapter->wpa_ie, 0, MAX_WPA_IE_LEN);
adapter->wpa_ie_len = 0;
}
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int should_deauth_infrastructure(wlan_adapter *adapter,
struct assoc_request * assoc_req)
{
if (adapter->connect_status != libertas_connected)
return 0;
if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
lbs_deb_assoc("Deauthenticating due to new SSID in "
" configuration request.\n");
return 1;
}
if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
if (adapter->secinfo.auth_mode != assoc_req->secinfo.auth_mode) {
lbs_deb_assoc("Deauthenticating due to updated security "
"info in configuration request.\n");
return 1;
}
}
if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
lbs_deb_assoc("Deauthenticating due to new BSSID in "
" configuration request.\n");
return 1;
}
/* FIXME: deal with 'auto' mode somehow */
if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
if (assoc_req->mode != IW_MODE_INFRA)
return 1;
}
return 0;
}
static int should_stop_adhoc(wlan_adapter *adapter,
struct assoc_request * assoc_req)
{
if (adapter->connect_status != libertas_connected)
return 0;
if (adapter->curbssparams.ssid.ssidlength != assoc_req->ssid.ssidlength)
return 1;
if (memcmp(adapter->curbssparams.ssid.ssid, assoc_req->ssid.ssid,
adapter->curbssparams.ssid.ssidlength))
return 1;
/* FIXME: deal with 'auto' mode somehow */
if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
if (assoc_req->mode != IW_MODE_ADHOC)
return 1;
}
return 0;
}
void libertas_association_worker(struct work_struct *work)
{
wlan_private *priv = container_of(work, wlan_private, assoc_work.work);
wlan_adapter *adapter = priv->adapter;
struct assoc_request * assoc_req = NULL;
int ret = 0;
int find_any_ssid = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
mutex_lock(&adapter->lock);
assoc_req = adapter->assoc_req;
adapter->assoc_req = NULL;
mutex_unlock(&adapter->lock);
if (!assoc_req)
goto done;
lbs_deb_assoc("ASSOC: starting new association request: flags = 0x%lX\n",
assoc_req->flags);
/* If 'any' SSID was specified, find an SSID to associate with */
if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)
&& !assoc_req->ssid.ssidlength)
find_any_ssid = 1;
/* But don't use 'any' SSID if there's a valid locked BSSID to use */
if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
if (memcmp(&assoc_req->bssid, bssid_any, ETH_ALEN)
&& memcmp(&assoc_req->bssid, bssid_off, ETH_ALEN))
find_any_ssid = 0;
}
if (find_any_ssid) {
u8 new_mode;
ret = libertas_find_best_network_SSID(priv, &assoc_req->ssid,
assoc_req->mode, &new_mode);
if (ret) {
lbs_deb_assoc("Could not find best network\n");
ret = -ENETUNREACH;
goto out;
}
/* Ensure we switch to the mode of the AP */
if (assoc_req->mode == IW_MODE_AUTO) {
set_bit(ASSOC_FLAG_MODE, &assoc_req->flags);
assoc_req->mode = new_mode;
}
}
/*
* Check if the attributes being changing require deauthentication
* from the currently associated infrastructure access point.
*/
if (adapter->mode == IW_MODE_INFRA) {
if (should_deauth_infrastructure(adapter, assoc_req)) {
ret = libertas_send_deauthentication(priv);
if (ret) {
lbs_deb_assoc("Deauthentication due to new "
"configuration request failed: %d\n",
ret);
}
}
} else if (adapter->mode == IW_MODE_ADHOC) {
if (should_stop_adhoc(adapter, assoc_req)) {
ret = libertas_stop_adhoc_network(priv);
if (ret) {
lbs_deb_assoc("Teardown of AdHoc network due to "
"new configuration request failed: %d\n",
ret);
}
}
}
/* Send the various configuration bits to the firmware */
if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
ret = assoc_helper_mode(priv, assoc_req);
if (ret) {
lbs_deb_assoc("ASSOC(:%d) mode: ret = %d\n", __LINE__, ret);
goto out;
}
}
if ( test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)
|| test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) {
ret = assoc_helper_wep_keys(priv, assoc_req);
if (ret) {
lbs_deb_assoc("ASSOC(:%d) wep_keys: ret = %d\n", __LINE__, ret);
goto out;
}
}
if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
ret = assoc_helper_secinfo(priv, assoc_req);
if (ret) {
lbs_deb_assoc("ASSOC(:%d) secinfo: ret = %d\n", __LINE__, ret);
goto out;
}
}
if (test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
ret = assoc_helper_wpa_ie(priv, assoc_req);
if (ret) {
lbs_deb_assoc("ASSOC(:%d) wpa_ie: ret = %d\n", __LINE__, ret);
goto out;
}
}
if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)
|| test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
ret = assoc_helper_wpa_keys(priv, assoc_req);
if (ret) {
lbs_deb_assoc("ASSOC(:%d) wpa_keys: ret = %d\n", __LINE__, ret);
goto out;
}
}
/* SSID/BSSID should be the _last_ config option set, because they
* trigger the association attempt.
*/
if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)
|| test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
int success = 1;
ret = assoc_helper_associate(priv, assoc_req);
if (ret) {
lbs_deb_assoc("ASSOC: association attempt unsuccessful: %d\n",
ret);
success = 0;
}
if (adapter->connect_status != libertas_connected) {
lbs_deb_assoc("ASSOC: assoication attempt unsuccessful, "
"not connected.\n");
success = 0;
}
if (success) {
lbs_deb_assoc("ASSOC: association attempt successful. "
"Associated to '%s' (" MAC_FMT ")\n",
assoc_req->ssid.ssid, MAC_ARG(assoc_req->bssid));
libertas_prepare_and_send_command(priv,
cmd_802_11_rssi,
0, cmd_option_waitforrsp, 0, NULL);
libertas_prepare_and_send_command(priv,
cmd_802_11_get_log,
0, cmd_option_waitforrsp, 0, NULL);
} else {
ret = -1;
}
}
out:
if (ret) {
lbs_deb_assoc("ASSOC: reconfiguration attempt unsuccessful: %d\n",
ret);
}
kfree(assoc_req);
done:
lbs_deb_leave(LBS_DEB_ASSOC);
}
/*
* Caller MUST hold any necessary locks
*/
struct assoc_request * wlan_get_association_request(wlan_adapter *adapter)
{
struct assoc_request * assoc_req;
if (!adapter->assoc_req) {
adapter->assoc_req = kzalloc(sizeof(struct assoc_request), GFP_KERNEL);
if (!adapter->assoc_req) {
lbs_pr_info("Not enough memory to allocate association"
" request!\n");
return NULL;
}
}
/* Copy current configuration attributes to the association request,
* but don't overwrite any that are already set.
*/
assoc_req = adapter->assoc_req;
if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
memcpy(&assoc_req->ssid, adapter->curbssparams.ssid.ssid,
adapter->curbssparams.ssid.ssidlength);
}
if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
assoc_req->channel = adapter->curbssparams.channel;
if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags))
assoc_req->mode = adapter->mode;
if (!test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
memcpy(&assoc_req->bssid, adapter->curbssparams.bssid,
ETH_ALEN);
}
if (!test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)) {
int i;
for (i = 0; i < 4; i++) {
memcpy(&assoc_req->wep_keys[i], &adapter->wep_keys[i],
sizeof(struct WLAN_802_11_KEY));
}
}
if (!test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags))
assoc_req->wep_tx_keyidx = adapter->wep_tx_keyidx;
if (!test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
memcpy(&assoc_req->wpa_mcast_key, &adapter->wpa_mcast_key,
sizeof(struct WLAN_802_11_KEY));
}
if (!test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
memcpy(&assoc_req->wpa_unicast_key, &adapter->wpa_unicast_key,
sizeof(struct WLAN_802_11_KEY));
}
if (!test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
memcpy(&assoc_req->secinfo, &adapter->secinfo,
sizeof(struct wlan_802_11_security));
}
if (!test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
memcpy(&assoc_req->wpa_ie, &adapter->wpa_ie,
MAX_WPA_IE_LEN);
assoc_req->wpa_ie_len = adapter->wpa_ie_len;
}
return assoc_req;
}
