atmel.c

LINUX 2.6.17.4的源码

	 * New version of iwconfig properly set the IW_ENCODE_NOKEY flag
	 * when no key is present (only change flags), but older versions
	 * don't do it. - Jean II */
	if (dwrq->length > 0) {
		int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
		int current_index = priv->default_key;
		/* Check the size of the key */
		if (dwrq->length > 13) {
			return -EINVAL;
		}
		/* Check the index (none -> use current) */
		if (index < 0 || index >= 4)
			index = current_index;
		else
			priv->default_key = index;
		/* Set the length */
		if (dwrq->length > 5)
			priv->wep_key_len[index] = 13;
		else
			if (dwrq->length > 0)
				priv->wep_key_len[index] = 5;
			else
				/* Disable the key */
				priv->wep_key_len[index] = 0;
		/* Check if the key is not marked as invalid */
		if(!(dwrq->flags & IW_ENCODE_NOKEY)) {
			/* Cleanup */
			memset(priv->wep_keys[index], 0, 13);
			/* Copy the key in the driver */
			memcpy(priv->wep_keys[index], extra, dwrq->length);
		}
		/* WE specify that if a valid key is set, encryption
		 * should be enabled (user may turn it off later)
		 * This is also how "iwconfig ethX key on" works */
		if (index == current_index &&
		    priv->wep_key_len[index] > 0) {
			priv->wep_is_on = 1;
			priv->exclude_unencrypted = 1;
			if (priv->wep_key_len[index] > 5) {
				priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
				priv->encryption_level = 2;
			} else {
				priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
				priv->encryption_level = 1;
			}
		}
	} else {
		/* Do we want to just set the transmit key index ? */
		int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
		if (index >= 0 && index < 4) {
			priv->default_key = index;
		} else
			/* Don't complain if only change the mode */
			if (!dwrq->flags & IW_ENCODE_MODE) {
				return -EINVAL;
			}
	}
	/* Read the flags */
	if (dwrq->flags & IW_ENCODE_DISABLED) {
		priv->wep_is_on = 0;
		priv->encryption_level = 0;
		priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
	} else {
		priv->wep_is_on = 1;
		if (priv->wep_key_len[priv->default_key] > 5) {
			priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
			priv->encryption_level = 2;
		} else {
			priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
			priv->encryption_level = 1;
		}
	}
	if (dwrq->flags & IW_ENCODE_RESTRICTED)
		priv->exclude_unencrypted = 1;
	if(dwrq->flags & IW_ENCODE_OPEN)
		priv->exclude_unencrypted = 0;

	return -EINPROGRESS;		/* Call commit handler */
}

static int atmel_get_encode(struct net_device *dev,
			    struct iw_request_info *info,
			    struct iw_point *dwrq,
			    char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;

	if (!priv->wep_is_on)
		dwrq->flags = IW_ENCODE_DISABLED;
	else {
		if (priv->exclude_unencrypted)
			dwrq->flags = IW_ENCODE_RESTRICTED;
		else
			dwrq->flags = IW_ENCODE_OPEN;
	}
		/* Which key do we want ? -1 -> tx index */
	if (index < 0 || index >= 4)
		index = priv->default_key;
	dwrq->flags |= index + 1;
	/* Copy the key to the user buffer */
	dwrq->length = priv->wep_key_len[index];
	if (dwrq->length > 16) {
		dwrq->length=0;
	} else {
		memset(extra, 0, 16);
		memcpy(extra, priv->wep_keys[index], dwrq->length);
	}

	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, alg = ext->alg, set_key = 1;

	/* 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)
	    alg = IW_ENCODE_ALG_NONE;

	if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
		priv->default_key = idx;
		set_key = ext->key_len > 0 ? 1 : 0;
	}

	if (set_key) {
		/* Set the requested key first */
		switch (alg) {
		case IW_ENCODE_ALG_NONE:
			priv->wep_is_on = 0;
			priv->encryption_level = 0;
			priv->pairwise_cipher_suite = CIPHER_SUITE_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,
			  char *extra)
{
	strcpy(cwrq, "IEEE 802.11-DS");
	return 0;
}

static int atmel_set_rate(struct net_device *dev,
			  struct iw_request_info *info,
			  struct iw_param *vwrq,
			  char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	if (vwrq->fixed == 0) {
		priv->tx_rate = 3;
		priv->auto_tx_rate = 1;
	} else {
		priv->auto_tx_rate = 0;

		/* Which type of value ? */
		if ((vwrq->value < 4) && (vwrq->value >= 0)) {
			/* Setting by rate index */
			priv->tx_rate = vwrq->value;
		} else {
		/* Setting by frequency value */
			switch (vwrq->value) {
			case  1000000: priv->tx_rate = 0; break;
			case  2000000: priv->tx_rate = 1; break;
			case  5500000: priv->tx_rate = 2; break;
			case 11000000: priv->tx_rate = 3; break;
			default: return -EINVAL;
			}
		}
	}

	return -EINPROGRESS;
}

static int atmel_set_mode(struct net_device *dev,
			  struct iw_request_info *info,
			  __u32 *uwrq,
			  char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	if (*uwrq != IW_MODE_ADHOC && *uwrq != IW_MODE_INFRA)
		return -EINVAL;

	priv->operating_mode = *uwrq;
	return -EINPROGRESS;
}

static int atmel_get_mode(struct net_device *dev,
			  struct iw_request_info *info,
			  __u32 *uwrq,
			  char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	*uwrq = priv->operating_mode;
	return 0;
}

static int atmel_get_rate(struct net_device *dev,
			 struct iw_request_info *info,
			 struct iw_param *vwrq,
			 char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	if (priv->auto_tx_rate) {
		vwrq->fixed = 0;
		vwrq->value = 11000000;
	} else {
		vwrq->fixed = 1;
		switch(priv->tx_rate) {
		case 0: vwrq->value =  1000000; break;
		case 1: vwrq->value =  2000000; break;
		case 2: vwrq->value =  5500000; break;
		case 3: vwrq->value = 11000000; break;
		}
	}
	return 0;
}

static int atmel_set_power(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_param *vwrq,
			   char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	priv->power_mode = vwrq->disabled ? 0 : 1;
	return -EINPROGRESS;
}

static int atmel_get_power(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_param *vwrq,
			   char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	vwrq->disabled = priv->power_mode ? 0 : 1;
	vwrq->flags = IW_POWER_ON;
	return 0;
}

static int atmel_set_retry(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_param *vwrq,
			   char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	if (!vwrq->disabled && (vwrq->flags & IW_RETRY_LIMIT)) {
		if (vwrq->flags & IW_RETRY_MAX)
			priv->long_retry = vwrq->value;
		else if (vwrq->flags & IW_RETRY_MIN)
			priv->short_retry = vwrq->value;
		else {
			/* No modifier : set both */
			priv->long_retry = vwrq->value;
			priv->short_retry = vwrq->value;
		}
		return -EINPROGRESS;
	}

	return -EINVAL;
}

static int atmel_get_retry(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_para