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OpenCloudOS-Kernel/drivers/net/wireless/libertas/assoc.c

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/* Copyright (C) 2006, Red Hat, Inc. */
#include <linux/bitops.h>
#include <net/ieee80211.h>
#include <linux/etherdevice.h>
#include "assoc.h"
#include "join.h"
#include "decl.h"
#include "hostcmd.h"
#include "host.h"
#include "cmd.h"
static const u8 bssid_any[ETH_ALEN] __attribute__ ((aligned (2))) =
{ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
static const u8 bssid_off[ETH_ALEN] __attribute__ ((aligned (2))) =
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static int assoc_helper_essid(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
struct bss_descriptor * bss;
int channel = -1;
lbs_deb_enter(LBS_DEB_ASSOC);
/* FIXME: take channel into account when picking SSIDs if a channel
* is set.
*/
if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
channel = assoc_req->channel;
lbs_deb_assoc("SSID '%s' requested\n",
escape_essid(assoc_req->ssid, assoc_req->ssid_len));
if (assoc_req->mode == IW_MODE_INFRA) {
lbs_send_specific_ssid_scan(priv, assoc_req->ssid,
assoc_req->ssid_len, 0);
bss = lbs_find_ssid_in_list(priv, assoc_req->ssid,
assoc_req->ssid_len, NULL, IW_MODE_INFRA, channel);
if (bss != NULL) {
memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
ret = lbs_associate(priv, assoc_req);
} else {
lbs_deb_assoc("SSID not found; cannot associate\n");
}
} 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
*/
lbs_send_specific_ssid_scan(priv, assoc_req->ssid,
assoc_req->ssid_len, 1);
/* Search for the requested SSID in the scan table */
bss = lbs_find_ssid_in_list(priv, assoc_req->ssid,
assoc_req->ssid_len, NULL, IW_MODE_ADHOC, channel);
if (bss != NULL) {
lbs_deb_assoc("SSID found, will join\n");
memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
lbs_join_adhoc_network(priv, assoc_req);
} else {
/* else send START command */
lbs_deb_assoc("SSID not found, creating adhoc network\n");
memcpy(&assoc_req->bss.ssid, &assoc_req->ssid,
IW_ESSID_MAX_SIZE);
assoc_req->bss.ssid_len = assoc_req->ssid_len;
lbs_start_adhoc_network(priv, assoc_req);
}
}
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_bssid(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
struct bss_descriptor * bss;
DECLARE_MAC_BUF(mac);
lbs_deb_enter_args(LBS_DEB_ASSOC, "BSSID %s",
print_mac(mac, assoc_req->bssid));
/* Search for index position in list for requested MAC */
bss = lbs_find_bssid_in_list(priv, assoc_req->bssid,
assoc_req->mode);
if (bss == NULL) {
lbs_deb_assoc("ASSOC: WAP: BSSID %s not found, "
"cannot associate.\n", print_mac(mac, assoc_req->bssid));
goto out;
}
memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
if (assoc_req->mode == IW_MODE_INFRA) {
ret = lbs_associate(priv, assoc_req);
lbs_deb_assoc("ASSOC: lbs_associate(bssid) returned %d\n", ret);
} else if (assoc_req->mode == IW_MODE_ADHOC) {
lbs_join_adhoc_network(priv, assoc_req);
}
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_associate(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0, done = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
/* If we're given and 'any' BSSID, try associating based on SSID */
if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
if (compare_ether_addr(bssid_any, assoc_req->bssid)
&& compare_ether_addr(bssid_off, assoc_req->bssid)) {
ret = assoc_helper_bssid(priv, assoc_req);
done = 1;
}
}
if (!done && test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
ret = assoc_helper_essid(priv, assoc_req);
}
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_mode(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
if (assoc_req->mode == priv->mode)
goto done;
if (assoc_req->mode == IW_MODE_INFRA) {
if (priv->psstate != PS_STATE_FULL_POWER)
lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
priv->psmode = LBS802_11POWERMODECAM;
}
priv->mode = assoc_req->mode;
ret = lbs_prepare_and_send_command(priv,
CMD_802_11_SNMP_MIB,
0, CMD_OPTION_WAITFORRSP,
OID_802_11_INFRASTRUCTURE_MODE,
/* Shoot me now */ (void *) (size_t) assoc_req->mode);
done:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
int lbs_update_channel(struct lbs_private *priv)
{
int ret;
/* the channel in f/w could be out of sync; get the current channel */
lbs_deb_enter(LBS_DEB_ASSOC);
ret = lbs_get_channel(priv);
if (ret > 0) {
priv->curbssparams.channel = ret;
ret = 0;
}
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_channel(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
ret = lbs_update_channel(priv);
if (ret) {
lbs_deb_assoc("ASSOC: channel: error getting channel.\n");
goto done;
}
if (assoc_req->channel == priv->curbssparams.channel)
goto done;
if (priv->mesh_dev) {
/* Change mesh channel first; 21.p21 firmware won't let
you change channel otherwise (even though it'll return
an error to this */
lbs_mesh_config(priv, 0, assoc_req->channel);
}
lbs_deb_assoc("ASSOC: channel: %d -> %d\n",
priv->curbssparams.channel, assoc_req->channel);
ret = lbs_set_channel(priv, assoc_req->channel);
if (ret < 0)
lbs_deb_assoc("ASSOC: channel: error setting channel.\n");
/* FIXME: shouldn't need to grab the channel _again_ after setting
* it since the firmware is supposed to return the new channel, but
* whatever... */
ret = lbs_update_channel(priv);
if (ret) {
lbs_deb_assoc("ASSOC: channel: error getting channel.\n");
goto done;
}
if (assoc_req->channel != priv->curbssparams.channel) {
lbs_deb_assoc("ASSOC: channel: failed to update channel to %d\n",
assoc_req->channel);
goto restore_mesh;
}
if ( assoc_req->secinfo.wep_enabled
&& (assoc_req->wep_keys[0].len
|| assoc_req->wep_keys[1].len
|| assoc_req->wep_keys[2].len
|| assoc_req->wep_keys[3].len)) {
/* Make sure WEP keys are re-sent to firmware */
set_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags);
}
/* Must restart/rejoin adhoc networks after channel change */
set_bit(ASSOC_FLAG_SSID, &assoc_req->flags);
restore_mesh:
if (priv->mesh_dev)
lbs_mesh_config(priv, 1, priv->curbssparams.channel);
done:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_wep_keys(struct lbs_private *priv,
struct assoc_request *assoc_req)
{
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 = lbs_cmd_802_11_set_wep(priv, CMD_ACT_ADD, assoc_req);
else
ret = lbs_cmd_802_11_set_wep(priv, CMD_ACT_REMOVE, assoc_req);
if (ret)
goto out;
/* enable/disable the MAC's WEP packet filter */
if (assoc_req->secinfo.wep_enabled)
priv->currentpacketfilter |= CMD_ACT_MAC_WEP_ENABLE;
else
priv->currentpacketfilter &= ~CMD_ACT_MAC_WEP_ENABLE;
ret = lbs_set_mac_packet_filter(priv);
if (ret)
goto out;
mutex_lock(&priv->lock);
/* Copy WEP keys into priv wep key fields */
for (i = 0; i < 4; i++) {
memcpy(&priv->wep_keys[i], &assoc_req->wep_keys[i],
sizeof(struct enc_key));
}
priv->wep_tx_keyidx = assoc_req->wep_tx_keyidx;
mutex_unlock(&priv->lock);
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_secinfo(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
uint16_t do_wpa;
uint16_t rsn = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
memcpy(&priv->secinfo, &assoc_req->secinfo,
sizeof(struct lbs_802_11_security));
ret = lbs_set_mac_packet_filter(priv);
if (ret)
goto out;
/* If RSN is already enabled, don't try to enable it again, since
* ENABLE_RSN resets internal state machines and will clobber the
* 4-way WPA handshake.
*/
/* Get RSN enabled/disabled */
ret = lbs_cmd_802_11_enable_rsn(priv, CMD_ACT_GET, &rsn);
if (ret) {
lbs_deb_assoc("Failed to get RSN status: %d\n", ret);
goto out;
}
/* Don't re-enable RSN if it's already enabled */
do_wpa = assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled;
if (do_wpa == rsn)
goto out;
/* Set RSN enabled/disabled */
ret = lbs_cmd_802_11_enable_rsn(priv, CMD_ACT_SET, &do_wpa);
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_wpa_keys(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
unsigned int flags = assoc_req->flags;
lbs_deb_enter(LBS_DEB_ASSOC);
/* Work around older firmware bug where WPA unicast and multicast
* keys must be set independently. Seen in SDIO parts with firmware
* version 5.0.11p0.
*/
if (test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
clear_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags);
ret = lbs_prepare_and_send_command(priv,
CMD_802_11_KEY_MATERIAL,
CMD_ACT_SET,
CMD_OPTION_WAITFORRSP,
0, assoc_req);
assoc_req->flags = flags;
}
if (ret)
goto out;
if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
clear_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags);
ret = lbs_prepare_and_send_command(priv,
CMD_802_11_KEY_MATERIAL,
CMD_ACT_SET,
CMD_OPTION_WAITFORRSP,
0, assoc_req);
assoc_req->flags = flags;
}
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int assoc_helper_wpa_ie(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
lbs_deb_enter(LBS_DEB_ASSOC);
if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) {
memcpy(&priv->wpa_ie, &assoc_req->wpa_ie, assoc_req->wpa_ie_len);
priv->wpa_ie_len = assoc_req->wpa_ie_len;
} else {
memset(&priv->wpa_ie, 0, MAX_WPA_IE_LEN);
priv->wpa_ie_len = 0;
}
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int should_deauth_infrastructure(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
int ret = 0;
if (priv->connect_status != LBS_CONNECTED)
return 0;
lbs_deb_enter(LBS_DEB_ASSOC);
if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
lbs_deb_assoc("Deauthenticating due to new SSID\n");
ret = 1;
goto out;
}
if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
if (priv->secinfo.auth_mode != assoc_req->secinfo.auth_mode) {
lbs_deb_assoc("Deauthenticating due to new security\n");
ret = 1;
goto out;
}
}
if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
lbs_deb_assoc("Deauthenticating due to new BSSID\n");
ret = 1;
goto out;
}
if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
lbs_deb_assoc("Deauthenticating due to channel switch\n");
ret = 1;
goto out;
}
/* FIXME: deal with 'auto' mode somehow */
if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
if (assoc_req->mode != IW_MODE_INFRA) {
lbs_deb_assoc("Deauthenticating due to leaving "
"infra mode\n");
ret = 1;
goto out;
}
}
out:
lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
return ret;
}
static int should_stop_adhoc(struct lbs_private *priv,
struct assoc_request * assoc_req)
{
lbs_deb_enter(LBS_DEB_ASSOC);
if (priv->connect_status != LBS_CONNECTED)
return 0;
if (lbs_ssid_cmp(priv->curbssparams.ssid,
priv->curbssparams.ssid_len,
assoc_req->ssid, assoc_req->ssid_len) != 0)
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;
}
if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
if (assoc_req->channel != priv->curbssparams.channel)
return 1;
}
lbs_deb_leave(LBS_DEB_ASSOC);
return 0;
}
void lbs_association_worker(struct work_struct *work)
{
struct lbs_private *priv = container_of(work, struct lbs_private,
assoc_work.work);
struct assoc_request * assoc_req = NULL;
int ret = 0;
int find_any_ssid = 0;
DECLARE_MAC_BUF(mac);
lbs_deb_enter(LBS_DEB_ASSOC);
mutex_lock(&priv->lock);
assoc_req = priv->pending_assoc_req;
priv->pending_assoc_req = NULL;
priv->in_progress_assoc_req = assoc_req;
mutex_unlock(&priv->lock);
if (!assoc_req)
goto done;
lbs_deb_assoc(
"Association Request:\n"
" flags: 0x%08lx\n"
" SSID: '%s'\n"
" chann: %d\n"
" band: %d\n"
" mode: %d\n"
" BSSID: %s\n"
" secinfo: %s%s%s\n"
" auth_mode: %d\n",
assoc_req->flags,
escape_essid(assoc_req->ssid, assoc_req->ssid_len),
assoc_req->channel, assoc_req->band, assoc_req->mode,
print_mac(mac, assoc_req->bssid),
assoc_req->secinfo.WPAenabled ? " WPA" : "",
assoc_req->secinfo.WPA2enabled ? " WPA2" : "",
assoc_req->secinfo.wep_enabled ? " WEP" : "",
assoc_req->secinfo.auth_mode);
/* If 'any' SSID was specified, find an SSID to associate with */
if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)
&& !assoc_req->ssid_len)
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 (compare_ether_addr(assoc_req->bssid, bssid_any)
&& compare_ether_addr(assoc_req->bssid, bssid_off))
find_any_ssid = 0;
}
if (find_any_ssid) {
u8 new_mode;
ret = lbs_find_best_network_ssid(priv, assoc_req->ssid,
&assoc_req->ssid_len, 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 (priv->mode == IW_MODE_INFRA) {
if (should_deauth_infrastructure(priv, assoc_req)) {
ret = lbs_send_deauthentication(priv);
if (ret) {
lbs_deb_assoc("Deauthentication due to new "
"configuration request failed: %d\n",
ret);
}
}
} else if (priv->mode == IW_MODE_ADHOC) {
if (should_stop_adhoc(priv, assoc_req)) {
ret = lbs_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)
goto out;
}
if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
ret = assoc_helper_channel(priv, assoc_req);
if (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)
goto out;
}
if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
ret = assoc_helper_secinfo(priv, assoc_req);
if (ret)
goto out;
}
if (test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
ret = assoc_helper_wpa_ie(priv, assoc_req);
if (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)
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 unsuccessful: %d\n",
ret);
success = 0;
}
if (priv->connect_status != LBS_CONNECTED) {
lbs_deb_assoc("ASSOC: association unsuccessful, "
"not connected\n");
success = 0;
}
if (success) {
lbs_deb_assoc("associated to %s\n",
print_mac(mac, priv->curbssparams.bssid));
lbs_prepare_and_send_command(priv,
CMD_802_11_RSSI,
0, CMD_OPTION_WAITFORRSP, 0, NULL);
lbs_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);
}
mutex_lock(&priv->lock);
priv->in_progress_assoc_req = NULL;
mutex_unlock(&priv->lock);
kfree(assoc_req);
done:
lbs_deb_leave(LBS_DEB_ASSOC);
}
/*
* Caller MUST hold any necessary locks
*/
struct assoc_request *lbs_get_association_request(struct lbs_private *priv)
{
struct assoc_request * assoc_req;
lbs_deb_enter(LBS_DEB_ASSOC);
if (!priv->pending_assoc_req) {
priv->pending_assoc_req = kzalloc(sizeof(struct assoc_request),
GFP_KERNEL);
if (!priv->pending_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 = priv->pending_assoc_req;
if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
memcpy(&assoc_req->ssid, &priv->curbssparams.ssid,
IW_ESSID_MAX_SIZE);
assoc_req->ssid_len = priv->curbssparams.ssid_len;
}
if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
assoc_req->channel = priv->curbssparams.channel;
if (!test_bit(ASSOC_FLAG_BAND, &assoc_req->flags))
assoc_req->band = priv->curbssparams.band;
if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags))
assoc_req->mode = priv->mode;
if (!test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
memcpy(&assoc_req->bssid, priv->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], &priv->wep_keys[i],
sizeof(struct enc_key));
}
}
if (!test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags))
assoc_req->wep_tx_keyidx = priv->wep_tx_keyidx;
if (!test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
memcpy(&assoc_req->wpa_mcast_key, &priv->wpa_mcast_key,
sizeof(struct enc_key));
}
if (!test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
memcpy(&assoc_req->wpa_unicast_key, &priv->wpa_unicast_key,
sizeof(struct enc_key));
}
if (!test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
memcpy(&assoc_req->secinfo, &priv->secinfo,
sizeof(struct lbs_802_11_security));
}
if (!test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
memcpy(&assoc_req->wpa_ie, &priv->wpa_ie,
MAX_WPA_IE_LEN);
assoc_req->wpa_ie_len = priv->wpa_ie_len;
}
lbs_deb_leave(LBS_DEB_ASSOC);
return assoc_req;
}
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