hostap_ioctl.c

IEEE 802.11a/b/g linux2.4/2.6 驱动程序源代码

		}
		data->length = val;
		memcpy(essid, ssid + 2, IW_ESSID_MAX_SIZE);
	}

	return 0;
}


static int prism2_ioctl_giwrange(struct net_device *dev,
				 struct iw_request_info *info,
				 struct iw_point *data, char *extra)
{
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;
	struct iw_range *range = (struct iw_range *) extra;
	u8 rates[10];
	u16 val;
	int i, len, over2;

	data->length = sizeof(struct iw_range);
	memset(range, 0, sizeof(struct iw_range));

	/* TODO: could fill num_txpower and txpower array with
	 * something; however, there are 128 different values.. */

	range->txpower_capa = IW_TXPOW_DBM;

	if (local->iw_mode == IW_MODE_INFRA || local->iw_mode == IW_MODE_ADHOC)
	{
		range->min_pmp = 1 * 1024;
		range->max_pmp = 65535 * 1024;
		range->min_pmt = 1 * 1024;
		range->max_pmt = 1000 * 1024;
		range->pmp_flags = IW_POWER_PERIOD;
		range->pmt_flags = IW_POWER_TIMEOUT;
		range->pm_capa = IW_POWER_PERIOD | IW_POWER_TIMEOUT |
			IW_POWER_UNICAST_R | IW_POWER_ALL_R;
	}

	range->we_version_compiled = WIRELESS_EXT;
	range->we_version_source = 18;

	range->retry_capa = IW_RETRY_LIMIT;
	range->retry_flags = IW_RETRY_LIMIT;
	range->min_retry = 0;
	range->max_retry = 255;

	range->num_channels = FREQ_COUNT;

	val = 0;
	for (i = 0; i < FREQ_COUNT; i++) {
		if (local->channel_mask & (1 << i)) {
			range->freq[val].i = i + 1;
			range->freq[val].m = freq_list[i] * 100000;
			range->freq[val].e = 1;
			val++;
		}
		if (val == IW_MAX_FREQUENCIES)
			break;
	}
	range->num_frequency = val;

	if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1)) {
		range->max_qual.qual = 70; /* what is correct max? This was not
					    * documented exactly. At least
					    * 69 has been observed. */
		range->max_qual.level = 0; /* dB */
		range->max_qual.noise = 0; /* dB */

		/* What would be suitable values for "average/typical" qual? */
		range->avg_qual.qual = 20;
		range->avg_qual.level = -60;
		range->avg_qual.noise = -95;
	} else {
		range->max_qual.qual = 92; /* 0 .. 92 */
		range->max_qual.level = 154; /* 27 .. 154 */
		range->max_qual.noise = 154; /* 27 .. 154 */
	}
	range->sensitivity = 3;

	range->max_encoding_tokens = WEP_KEYS;
	range->num_encoding_sizes = 2;
	range->encoding_size[0] = 5;
	range->encoding_size[1] = 13;

	over2 = 0;
	len = prism2_get_datarates(dev, rates);
	range->num_bitrates = 0;
	for (i = 0; i < len; i++) {
		if (range->num_bitrates < IW_MAX_BITRATES) {
			range->bitrate[range->num_bitrates] =
				rates[i] * 500000;
			range->num_bitrates++;
		}
		if (rates[i] == 0x0b || rates[i] == 0x16)
			over2 = 1;
	}
	/* estimated maximum TCP throughput values (bps) */
	range->throughput = over2 ? 5500000 : 1500000;

	range->min_rts = 0;
	range->max_rts = 2347;
	range->min_frag = 256;
	range->max_frag = 2346;

#if WIRELESS_EXT > 16
	/* Event capability (kernel + driver) */
	range->event_capa[0] = (IW_EVENT_CAPA_K_0 |
				IW_EVENT_CAPA_MASK(SIOCGIWTHRSPY) |
				IW_EVENT_CAPA_MASK(SIOCGIWAP) |
				IW_EVENT_CAPA_MASK(SIOCGIWSCAN));
	range->event_capa[1] = IW_EVENT_CAPA_K_1;
	range->event_capa[4] = (IW_EVENT_CAPA_MASK(IWEVTXDROP) |
				IW_EVENT_CAPA_MASK(IWEVCUSTOM) |
				IW_EVENT_CAPA_MASK(IWEVREGISTERED) |
				IW_EVENT_CAPA_MASK(IWEVEXPIRED));
#endif /* WIRELESS_EXT > 16 */

#if WIRELESS_EXT > 17
	range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 |
		IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
#endif /* WIRELESS_EXT > 17 */

	return 0;
}


static int hostap_monitor_mode_enable(local_info_t *local)
{
	struct net_device *dev = local->dev;

	printk(KERN_DEBUG "Enabling monitor mode\n");
	hostap_monitor_set_type(local);

	if (hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE,
			    HFA384X_PORTTYPE_PSEUDO_IBSS)) {
		printk(KERN_DEBUG "Port type setting for monitor mode "
		       "failed\n");
		return -EOPNOTSUPP;
	}

	/* Host decrypt is needed to get the IV and ICV fields;
	 * however, monitor mode seems to remove WEP flag from frame
	 * control field */
	if (hostap_set_word(dev, HFA384X_RID_CNFWEPFLAGS,
			    HFA384X_WEPFLAGS_HOSTENCRYPT |
			    HFA384X_WEPFLAGS_HOSTDECRYPT)) {
		printk(KERN_DEBUG "WEP flags setting failed\n");
		return -EOPNOTSUPP;
	}

	if (local->func->reset_port(dev) ||
	    local->func->cmd(dev, HFA384X_CMDCODE_TEST |
			     (HFA384X_TEST_MONITOR << 8),
			     0, NULL, NULL)) {
		printk(KERN_DEBUG "Setting monitor mode failed\n");
		return -EOPNOTSUPP;
	}

	return 0;
}


static int hostap_monitor_mode_disable(local_info_t *local)
{
	struct net_device *dev = local->ddev;

	if (dev == NULL)
		return -1;

	printk(KERN_DEBUG "%s: Disabling monitor mode\n", dev->name);
	dev->type = ARPHRD_ETHER;
	dev->hard_header_parse = local->saved_eth_header_parse;
	if (local->func->cmd(dev, HFA384X_CMDCODE_TEST |
			     (HFA384X_TEST_STOP << 8),
			     0, NULL, NULL))
		return -1;
	return hostap_set_encryption(local);
}


static int prism2_ioctl_siwmode(struct net_device *dev,
				struct iw_request_info *info,
				__u32 *mode, char *extra)
{
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;
	int double_reset = 0;

	if (*mode != IW_MODE_ADHOC && *mode != IW_MODE_INFRA &&
	    *mode != IW_MODE_MASTER && *mode != IW_MODE_REPEAT &&
	    *mode != IW_MODE_MONITOR)
		return -EOPNOTSUPP;

#ifdef PRISM2_NO_STATION_MODES
	if (*mode == IW_MODE_ADHOC || *mode == IW_MODE_INFRA)
		return -EOPNOTSUPP;
#endif /* PRISM2_NO_STATION_MODES */

	if (*mode == local->iw_mode)
		return 0;

	if (*mode == IW_MODE_MASTER && local->essid[0] == '\0') {
		printk(KERN_WARNING "%s: empty SSID not allowed in Master "
		       "mode\n", dev->name);
		return -EINVAL;
	}

	if (local->iw_mode == IW_MODE_MONITOR)
		hostap_monitor_mode_disable(local);

	if ((local->iw_mode == IW_MODE_ADHOC ||
	     local->iw_mode == IW_MODE_MONITOR) && *mode == IW_MODE_MASTER) {
		/* There seems to be a firmware bug in at least STA f/w v1.5.6
		 * that leaves beacon frames to use IBSS type when moving from
		 * IBSS to Host AP mode. Doing double Port0 reset seems to be
		 * enough to workaround this. */
		double_reset = 1;
	}

	printk(KERN_DEBUG "prism2: %s: operating mode changed "
	       "%d -> %d\n", dev->name, local->iw_mode, *mode);
	local->iw_mode = *mode;

	if (local->iw_mode == IW_MODE_MONITOR)
		hostap_monitor_mode_enable(local);
	else if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
		 !local->fw_encrypt_ok) {
		printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
		       "a workaround for firmware bug in Host AP mode WEP\n",
		       dev->name);
		local->host_encrypt = 1;
	}

	if (hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE,
			    hostap_get_porttype(local)))
		return -EOPNOTSUPP;

	if (local->func->reset_port(dev))
		return -EINVAL;
	if (double_reset && local->func->reset_port(dev))
		return -EINVAL;

	if (local->iw_mode != IW_MODE_INFRA && local->iw_mode != IW_MODE_ADHOC)
	{
		/* netif_carrier is used only in client modes for now, so make
		 * sure carrier is on when moving to non-client modes. */
		netif_carrier_on(local->dev);
		netif_carrier_on(local->ddev);
	}
	return 0;
}


static int prism2_ioctl_giwmode(struct net_device *dev,
				struct iw_request_info *info,
				__u32 *mode, char *extra)
{
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;

	switch (iface->type) {
	case HOSTAP_INTERFACE_STA:
		*mode = IW_MODE_INFRA;
		break;
	case HOSTAP_INTERFACE_WDS:
		*mode = IW_MODE_REPEAT;
		break;
	default:
		*mode = local->iw_mode;
		break;
	}
	return 0;
}


static int prism2_ioctl_siwpower(struct net_device *dev,
				 struct iw_request_info *info,
				 struct iw_param *wrq, char *extra)
{
#ifdef PRISM2_NO_STATION_MODES
	return -EOPNOTSUPP;
#else /* PRISM2_NO_STATION_MODES */
	int ret = 0;

	if (wrq->disabled)
		return hostap_set_word(dev, HFA384X_RID_CNFPMENABLED, 0);

	switch (wrq->flags & IW_POWER_MODE) {
	case IW_POWER_UNICAST_R:
		ret = hostap_set_word(dev, HFA384X_RID_CNFMULTICASTRECEIVE, 0);
		if (ret)
			return ret;
		ret = hostap_set_word(dev, HFA384X_RID_CNFPMENABLED, 1);
		if (ret)
			return ret;
		break;
	case IW_POWER_ALL_R:
		ret = hostap_set_word(dev, HFA384X_RID_CNFMULTICASTRECEIVE, 1);
		if (ret)
			return ret;
		ret = hostap_set_word(dev, HFA384X_RID_CNFPMENABLED, 1);
		if (ret)
			return ret;
		break;
	case IW_POWER_ON:
		break;
	default:
		return -EINVAL;
	}

	if (wrq->flags & IW_POWER_TIMEOUT) {
		ret = hostap_set_word(dev, HFA384X_RID_CNFPMENABLED, 1);
		if (ret)
			return ret;
		ret = hostap_set_word(dev, HFA384X_RID_CNFPMHOLDOVERDURATION,
				      wrq->value / 1024);
		if (ret)
			return ret;
	}
	if (wrq->flags & IW_POWER_PERIOD) {
		ret = hostap_set_word(dev, HFA384X_RID_CNFPMENABLED, 1);
		if (ret)
			return ret;
		ret = hostap_set_word(dev, HFA384X_RID_CNFMAXSLEEPDURATION,
				      wrq->value / 1024);
		if (ret)
			return ret;
	}

	return ret;
#endif /* PRISM2_NO_STATION_MODES */
}


static int prism2_ioctl_giwpower(struct net_device *dev,
				 struct iw_request_info *info,
				 struct iw_param *rrq, char *extra)
{
#ifdef PRISM2_NO_STATION_MODES
	return -EOPNOTSUPP;
#else /* PRISM2_NO_STATION_MODES */
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;
	u16 enable, mcast;

	if (local->func->get_rid(dev, HFA384X_RID_CNFPMENABLED, &enable, 2, 1)
	    < 0)
		return -EINVAL;

	if (!__le16_to_cpu(enable)) {
		rrq->disabled = 1;
		return 0;
	}

	rrq->disabled = 0;

	if ((rrq->flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
		u16 timeout;
		if (local->func->get_rid(dev,
					 HFA384X_RID_CNFPMHOLDOVERDURATION,
					 &timeout, 2, 1) < 0)
			return -EINVAL;

		rrq->flags = IW_POWER_TIMEOUT;
		rrq->value = __le16_to_cpu(timeout) * 1024;
	} else {
		u16 period;
		if (local->func->get_rid(dev, HFA384X_RID_CNFMAXSLEEPDURATION,
					 &period, 2, 1) < 0)
			return -EINVAL;

		rrq->flags = IW_POWER_PERIOD;
		rrq->value = __le16_to_cpu(period) * 1024;
	}

	if (local->func->get_rid(dev, HFA384X_RID_CNFMULTICASTRECEIVE, &mcast,
				 2, 1) < 0)
		return -EINVAL;

	if (__le16_to_cpu(mcast))
		rrq->flags |= IW_POWER_ALL_R;
	else
		rrq->flags |= IW_POWER_UNICAST_R;

	return 0;
#endif /* PRISM2_NO_STATION_MODES */
}


static int prism2_ioctl_siwretry(struct net_device *dev,
				 struct iw_request_info *info,
				 struct iw_param *rrq, char *extra)
{
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;

	if (rrq->disabled)
		return -EINVAL;

	/* setting retry limits is not supported with the current station
	 * firmware code; simulate this with alternative retry count for now */
	if (rrq->flags == IW_RETRY_LIMIT) {
		if (rrq->value < 0) {
			/* disable manual retry count setting and use firmware
			 * defaults */
			local->manual_retry_count = -1;
			local->tx_control &= ~HFA384X_TX_CTRL_ALT_RTRY;
		} else {
			if (hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
					    rrq->value)) {
				printk(KERN_DEBUG "%s: Alternate retry count "
				       "setting to %d failed\n",
				       dev->name, rrq->value);
				return -EOPNOTSUPP;
			}

			local->manual_retry_count = rrq->value;
			local->tx_control |= HFA384X_TX_CTRL_ALT_RTRY;
		}
		return 0;
	}

	return -EOPNOTSUPP;

#if 0
	/* what could be done, if firmware would support this.. */

	if (rrq->flags & IW_RETRY_LIMIT) {
		if (rrq->flags & IW_RETRY_MAX)
			HFA384X_RID_LONGRETRYLIMIT = rrq->value;
		else if (rrq->flags & IW_RETRY_MIN)
			HFA384X_RID_SHORTRETRYLIMIT = rrq->value;
		else {
			HFA384X_RID_LONGRETRYLIMIT = rrq->value;
			HFA384X_RID_SHORTRETRYLIMIT = rrq->value;
		}

	}

	if (rrq->flags & IW_RETRY_LIFETIME) {
		HFA384X_RID_MAXTRANSMITLIFETIME = rrq->value / 1024;
	}

	return 0;
#endif /* 0 */
}

static int prism2_ioctl_giwretry(struct net_device *dev,
				 struct iw_request_info *info,
				 struct iw_param *rrq, char *extra)
{
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;
	u16 shortretry, longretry, lifetime, altretry;

	if (local->func->get_rid(dev, HFA384X_RID_SHORTRETRYLIMIT, &shortretry,
				 2, 1) < 0 ||
	    local->func->get_rid(dev, HFA384X_RID_LONGRETRYLIMIT, &longretry,
				 2, 1) < 0 ||
	    local->func->get_rid(dev, HFA384X_RID_MAXTRANSMITLIFETIME,
				 &lifetime, 2, 1) < 0)
		return -EINVAL;

	le16_to_cpus(&shortretry);
	le16_to_cpus(&longretry);
	le16_to_cpus(&lifetime);