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[PATCH] wireless/atmel: add IWENCODEEXT, IWAUTH, and association even…
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…t support

This patch allows the Atmel driver to work correctly with wpa_supplicant
and other programs that require some conformance with WEXT-18.  It
should not affect current behavior of the driver.  The patch does four
things:

1) Implements SIOCSIWENCODEEXT, SIOCGIWENCODEEXT, SIOCSIWAUTH, and
SIOCGIWAUTH calls for unencrypted and WEP operation

2) Accepts zero-filled addresses for SIOCSIWAP, which are legal and
should turn off any previous forced WAP address

3) Sends association and de-association events to userspace at most of
the appropriate times

4) Fixes erroneous order of CIPHER_SUITE_WEP_* arguments in one location
which are actually unused anyway

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
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Dan Williams authored and Jeff Garzik committed Jan 12, 2006
1 parent c213460 commit 9a6301c
Showing 1 changed file with 223 additions and 4 deletions.
227 changes: 223 additions & 4 deletions drivers/net/wireless/atmel.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1407,6 +1407,17 @@ static int atmel_close(struct net_device *dev)
{
struct atmel_private *priv = netdev_priv(dev);

/* Send event to userspace that we are disassociating */
if (priv->station_state == STATION_STATE_READY) {
union iwreq_data wrqu;

wrqu.data.length = 0;
wrqu.data.flags = 0;
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
}

atmel_enter_state(priv, STATION_STATE_DOWN);

if (priv->bus_type == BUS_TYPE_PCCARD)
Expand Down Expand Up @@ -1780,10 +1791,10 @@ static int atmel_set_encode(struct net_device *dev,
priv->wep_is_on = 1;
priv->exclude_unencrypted = 1;
if (priv->wep_key_len[index] > 5) {
priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
priv->encryption_level = 2;
} else {
priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
priv->encryption_level = 1;
}
}
Expand Down Expand Up @@ -1853,6 +1864,181 @@ static int atmel_get_encode(struct net_device *dev,
return 0;
}

static int atmel_set_encodeext(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
struct iw_point *encoding = &wrqu->encoding;
struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
int idx, key_len;

/* Determine and validate the key index */
idx = encoding->flags & IW_ENCODE_INDEX;
if (idx) {
if (idx < 1 || idx > WEP_KEYS)
return -EINVAL;
idx--;
} else
idx = priv->default_key;

if ((encoding->flags & IW_ENCODE_DISABLED) ||
ext->alg == IW_ENCODE_ALG_NONE) {
priv->wep_is_on = 0;
priv->encryption_level = 0;
priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
}

if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY)
priv->default_key = idx;

/* Set the requested key */
switch (ext->alg) {
case IW_ENCODE_ALG_NONE:
break;
case IW_ENCODE_ALG_WEP:
if (ext->key_len > 5) {
priv->wep_key_len[idx] = 13;
priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
priv->encryption_level = 2;
} else if (ext->key_len > 0) {
priv->wep_key_len[idx] = 5;
priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
priv->encryption_level = 1;
} else {
return -EINVAL;
}
priv->wep_is_on = 1;
memset(priv->wep_keys[idx], 0, 13);
key_len = min ((int)ext->key_len, priv->wep_key_len[idx]);
memcpy(priv->wep_keys[idx], ext->key, key_len);
break;
default:
return -EINVAL;
}

return -EINPROGRESS;
}

static int atmel_get_encodeext(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
struct iw_point *encoding = &wrqu->encoding;
struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
int idx, max_key_len;

max_key_len = encoding->length - sizeof(*ext);
if (max_key_len < 0)
return -EINVAL;

idx = encoding->flags & IW_ENCODE_INDEX;
if (idx) {
if (idx < 1 || idx > WEP_KEYS)
return -EINVAL;
idx--;
} else
idx = priv->default_key;

encoding->flags = idx + 1;
memset(ext, 0, sizeof(*ext));

if (!priv->wep_is_on) {
ext->alg = IW_ENCODE_ALG_NONE;
ext->key_len = 0;
encoding->flags |= IW_ENCODE_DISABLED;
} else {
if (priv->encryption_level > 0)
ext->alg = IW_ENCODE_ALG_WEP;
else
return -EINVAL;

ext->key_len = priv->wep_key_len[idx];
memcpy(ext->key, priv->wep_keys[idx], ext->key_len);
encoding->flags |= IW_ENCODE_ENABLED;
}

return 0;
}

static int atmel_set_auth(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
struct iw_param *param = &wrqu->param;

switch (param->flags & IW_AUTH_INDEX) {
case IW_AUTH_WPA_VERSION:
case IW_AUTH_CIPHER_PAIRWISE:
case IW_AUTH_CIPHER_GROUP:
case IW_AUTH_KEY_MGMT:
case IW_AUTH_RX_UNENCRYPTED_EAPOL:
case IW_AUTH_PRIVACY_INVOKED:
/*
* atmel does not use these parameters
*/
break;

case IW_AUTH_DROP_UNENCRYPTED:
priv->exclude_unencrypted = param->value ? 1 : 0;
break;

case IW_AUTH_80211_AUTH_ALG: {
if (param->value & IW_AUTH_ALG_SHARED_KEY) {
priv->exclude_unencrypted = 1;
} else if (param->value & IW_AUTH_ALG_OPEN_SYSTEM) {
priv->exclude_unencrypted = 0;
} else
return -EINVAL;
break;
}

case IW_AUTH_WPA_ENABLED:
/* Silently accept disable of WPA */
if (param->value > 0)
return -EOPNOTSUPP;
break;

default:
return -EOPNOTSUPP;
}
return -EINPROGRESS;
}

static int atmel_get_auth(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
struct iw_param *param = &wrqu->param;

switch (param->flags & IW_AUTH_INDEX) {
case IW_AUTH_DROP_UNENCRYPTED:
param->value = priv->exclude_unencrypted;
break;

case IW_AUTH_80211_AUTH_ALG:
if (priv->exclude_unencrypted == 1)
param->value = IW_AUTH_ALG_SHARED_KEY;
else
param->value = IW_AUTH_ALG_OPEN_SYSTEM;
break;

case IW_AUTH_WPA_ENABLED:
param->value = 0;
break;

default:
return -EOPNOTSUPP;
}
return 0;
}


static int atmel_get_name(struct net_device *dev,
struct iw_request_info *info,
char *cwrq,
Expand Down Expand Up @@ -2289,13 +2475,15 @@ static int atmel_set_wap(struct net_device *dev,
{
struct atmel_private *priv = netdev_priv(dev);
int i;
static const u8 bcast[] = { 255, 255, 255, 255, 255, 255 };
static const u8 any[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
static const u8 off[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
unsigned long flags;

if (awrq->sa_family != ARPHRD_ETHER)
return -EINVAL;

if (memcmp(bcast, awrq->sa_data, 6) == 0) {
if (!memcmp(any, awrq->sa_data, 6) ||
!memcmp(off, awrq->sa_data, 6)) {
del_timer_sync(&priv->management_timer);
spin_lock_irqsave(&priv->irqlock, flags);
atmel_scan(priv, 1);
Expand Down Expand Up @@ -2378,6 +2566,15 @@ static const iw_handler atmel_handler[] =
(iw_handler) atmel_get_encode, /* SIOCGIWENCODE */
(iw_handler) atmel_set_power, /* SIOCSIWPOWER */
(iw_handler) atmel_get_power, /* SIOCGIWPOWER */
(iw_handler) NULL, /* -- hole -- */
(iw_handler) NULL, /* -- hole -- */
(iw_handler) NULL, /* SIOCSIWGENIE */
(iw_handler) NULL, /* SIOCGIWGENIE */
(iw_handler) atmel_set_auth, /* SIOCSIWAUTH */
(iw_handler) atmel_get_auth, /* SIOCGIWAUTH */
(iw_handler) atmel_set_encodeext, /* SIOCSIWENCODEEXT */
(iw_handler) atmel_get_encodeext, /* SIOCGIWENCODEEXT */
(iw_handler) NULL, /* SIOCSIWPMKSA */
};

static const iw_handler atmel_private_handler[] =
Expand Down Expand Up @@ -2924,6 +3121,8 @@ static void associate(struct atmel_private *priv, u16 frame_len, u16 subtype)
u16 ass_id = le16_to_cpu(ass_resp->ass_id);
u16 rates_len = ass_resp->length > 4 ? 4 : ass_resp->length;

union iwreq_data wrqu;

if (frame_len < 8 + rates_len)
return;

Expand Down Expand Up @@ -2954,6 +3153,14 @@ static void associate(struct atmel_private *priv, u16 frame_len, u16 subtype)
priv->station_is_associated = 1;
priv->station_was_associated = 1;
atmel_enter_state(priv, STATION_STATE_READY);

/* Send association event to userspace */
wrqu.data.length = 0;
wrqu.data.flags = 0;
memcpy(wrqu.ap_addr.sa_data, priv->CurrentBSSID, ETH_ALEN);
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);

return;
}

Expand Down Expand Up @@ -3632,6 +3839,7 @@ static int reset_atmel_card(struct net_device *dev)

struct atmel_private *priv = netdev_priv(dev);
u8 configuration;
int old_state = priv->station_state;

/* data to add to the firmware names, in priority order
this implemenents firmware versioning */
Expand Down Expand Up @@ -3792,6 +4000,17 @@ static int reset_atmel_card(struct net_device *dev)
else
build_wep_mib(priv);

if (old_state == STATION_STATE_READY)
{
union iwreq_data wrqu;

wrqu.data.length = 0;
wrqu.data.flags = 0;
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
}

return 1;
}

Expand Down

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