hostap.c

IEEE 802.11a/b/g linux2.4/2.6 驱动程序源代码

	netif_device_attach(dev);
	netif_start_queue(dev);

	return 0;
}


#ifdef HAVE_SET_MAC_ADDR
static int prism2_set_mac_address(struct net_device *dev, void *p)
{
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;
	struct list_head *ptr;
	struct sockaddr *addr = p;

	if (local->func->set_rid(dev, HFA384X_RID_CNFOWNMACADDR, addr->sa_data,
				 ETH_ALEN) < 0 || local->func->reset_port(dev))
		return -EINVAL;

	read_lock_bh(&local->iface_lock);
	list_for_each(ptr, &local->hostap_interfaces) {
		iface = list_entry(ptr, struct hostap_interface, list);
		memcpy(iface->dev->dev_addr, addr->sa_data, ETH_ALEN);
	}
	memcpy(local->dev->dev_addr, addr->sa_data, ETH_ALEN);
	read_unlock_bh(&local->iface_lock);

	return 0;
}
#endif /* HAVE_SET_MAC_ADDR */


/* TODO: to be further implemented as soon as Prism2 fully supports
 *       GroupAddresses and correct documentation is available */
void hostap_set_multicast_list_queue(void *data)
{
	struct net_device *dev = (struct net_device *) data;
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;

	if (hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
			    local->is_promisc)) {
		printk(KERN_INFO "%s: %sabling promiscuous mode failed\n",
		       dev->name, local->is_promisc ? "en" : "dis");
	}

#ifndef NEW_MODULE_CODE
	MOD_DEC_USE_COUNT;
#endif
}


static void hostap_set_multicast_list(struct net_device *dev)
{
#if 0
	/* FIX: promiscuous mode seems to be causing a lot of problems with
	 * some station firmware versions (FCSErr frames, invalid MACPort, etc.
	 * corrupted incoming frames). This code is now commented out while the
	 * problems are investigated. */
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;

	if ((dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) {
		local->is_promisc = 1;
	} else {
		local->is_promisc = 0;
	}

	PRISM2_SCHEDULE_TASK(&local->set_multicast_list_queue);
#endif
}


static int prism2_change_mtu(struct net_device *dev, int new_mtu)
{
	if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU)
		return -EINVAL;

	dev->mtu = new_mtu;
	return 0;
}


#ifdef HAVE_TX_TIMEOUT
static void prism2_tx_timeout(struct net_device *dev)
{
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;
	struct hfa384x_regs regs;

	printk(KERN_WARNING "%s Tx timed out! Resetting card\n", dev->name);
	netif_stop_queue(local->dev);

	local->func->read_regs(dev, &regs);
	printk(KERN_DEBUG "%s: CMD=%04x EVSTAT=%04x "
	       "OFFSET0=%04x OFFSET1=%04x SWSUPPORT0=%04x\n",
	       dev->name, regs.cmd, regs.evstat, regs.offset0, regs.offset1,
	       regs.swsupport0);

	local->func->schedule_reset(local);
}
#endif /* HAVE_TX_TIMEOUT */


void hostap_setup_dev(struct net_device *dev, local_info_t *local,
		      int main_dev)
{
	struct hostap_interface *iface = dev->priv;

	ether_setup(dev);

	/* kernel callbacks */
	dev->get_stats = hostap_get_stats;
#if WIRELESS_EXT > 16
	if (iface) {
		/* Currently, we point to the proper spy_data only on
		 * the main_dev. This could be fixed. Jean II */
		iface->wireless_data.spy_data = &iface->spy_data;
		dev->wireless_data = &iface->wireless_data;
	}
#else /* WIRELESS_EXT > 16 */
	if (main_dev || (iface && iface->type == HOSTAP_INTERFACE_MAIN))
		dev->get_wireless_stats =  hostap_get_wireless_stats;
#endif /* WIRELESS_EXT > 16 */
	dev->wireless_handlers =
		(struct iw_handler_def *) &hostap_iw_handler_def;
	dev->do_ioctl = hostap_ioctl;
	dev->open = prism2_open;
	dev->stop = prism2_close;
	dev->hard_start_xmit = hostap_data_start_xmit;
	dev->set_mac_address = prism2_set_mac_address;
	dev->set_multicast_list = hostap_set_multicast_list;
	dev->change_mtu = prism2_change_mtu;
	dev->tx_timeout = prism2_tx_timeout;
	dev->watchdog_timeo = TX_TIMEOUT;

	dev->mtu = local->mtu;
	if (!main_dev) {
		/* use main radio device queue */
		dev->tx_queue_len = 0;
	}

	netif_stop_queue(dev);
}


static int hostap_enable_hostapd(local_info_t *local, int rtnl_locked)
{
	struct net_device *dev = local->dev;

	if (local->apdev)
		return -EEXIST;

	printk(KERN_DEBUG "%s: enabling hostapd mode\n", dev->name);

	local->apdev = hostap_add_interface(local, HOSTAP_INTERFACE_AP,
					    rtnl_locked, local->ddev->name,
					    "ap");
	if (local->apdev == NULL)
		return -ENOMEM;

	local->apdev->hard_start_xmit = hostap_mgmt_start_xmit;
	local->apdev->type = ARPHRD_IEEE80211;
	local->apdev->hard_header_parse = hostap_80211_header_parse;

	return 0;
}


static int hostap_disable_hostapd(local_info_t *local, int rtnl_locked)
{
	struct net_device *dev = local->dev;

	printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);

	hostap_remove_interface(local->apdev, rtnl_locked, 1);
	local->apdev = NULL;

	return 0;
}


static int hostap_enable_hostapd_sta(local_info_t *local, int rtnl_locked)
{
	struct net_device *dev = local->dev;

	if (local->stadev)
		return -EEXIST;

	printk(KERN_DEBUG "%s: enabling hostapd STA mode\n", dev->name);

	local->stadev = hostap_add_interface(local, HOSTAP_INTERFACE_STA,
					     rtnl_locked, local->ddev->name,
					     "sta");
	if (local->stadev == NULL)
		return -ENOMEM;

	return 0;
}


static int hostap_disable_hostapd_sta(local_info_t *local, int rtnl_locked)
{
	struct net_device *dev = local->dev;

	printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);

	hostap_remove_interface(local->stadev, rtnl_locked, 1);
	local->stadev = NULL;

	return 0;
}


int hostap_set_hostapd(local_info_t *local, int val, int rtnl_locked)
{
	int ret;

	if (val < 0 || val > 1)
		return -EINVAL;

	if (local->hostapd == val)
		return 0;

	if (val) {
		ret = hostap_enable_hostapd(local, rtnl_locked);
		if (ret == 0)
			local->hostapd = 1;
	} else {
		local->hostapd = 0;
		ret = hostap_disable_hostapd(local, rtnl_locked);
		if (ret != 0)
			local->hostapd = 1;
	}

	return ret;
}


int hostap_set_hostapd_sta(local_info_t *local, int val, int rtnl_locked)
{
	int ret;

	if (val < 0 || val > 1)
		return -EINVAL;

	if (local->hostapd_sta == val)
		return 0;

	if (val) {
		ret = hostap_enable_hostapd_sta(local, rtnl_locked);
		if (ret == 0)
			local->hostapd_sta = 1;
	} else {
		local->hostapd_sta = 0;
		ret = hostap_disable_hostapd_sta(local, rtnl_locked);
		if (ret != 0)
			local->hostapd_sta = 1;
	}


	return ret;
}


int prism2_update_comms_qual(struct net_device *dev)
{
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;
	int ret = 0;
	struct hfa384x_comms_quality sq;

	if (!local->sta_fw_ver)
		ret = -1;
	else if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1)) {
		if (local->func->get_rid(local->dev,
					 HFA384X_RID_DBMCOMMSQUALITY,
					 &sq, sizeof(sq), 1) >= 0) {
			local->comms_qual = (s16) le16_to_cpu(sq.comm_qual);
			local->avg_signal = (s16) le16_to_cpu(sq.signal_level);
			local->avg_noise = (s16) le16_to_cpu(sq.noise_level);
			local->last_comms_qual_update = jiffies;
		} else
			ret = -1;
	} else {
		if (local->func->get_rid(local->dev, HFA384X_RID_COMMSQUALITY,
					 &sq, sizeof(sq), 1) >= 0) {
			local->comms_qual = le16_to_cpu(sq.comm_qual);
			local->avg_signal = HFA384X_LEVEL_TO_dBm(
				le16_to_cpu(sq.signal_level));
			local->avg_noise = HFA384X_LEVEL_TO_dBm(
				le16_to_cpu(sq.noise_level));
			local->last_comms_qual_update = jiffies;
		} else
			ret = -1;
	}

	return ret;
}


int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u8 stype,
			 u8 *body, size_t bodylen)
{
	struct sk_buff *skb;
	struct hostap_ieee80211_mgmt *mgmt;
	struct hostap_skb_tx_data *meta;
	struct net_device *dev = local->dev;

	skb = dev_alloc_skb(IEEE80211_MGMT_HDR_LEN + bodylen);
	if (skb == NULL)
		return -ENOMEM;

	mgmt = (struct hostap_ieee80211_mgmt *)
		skb_put(skb, IEEE80211_MGMT_HDR_LEN);
	memset(mgmt, 0, IEEE80211_MGMT_HDR_LEN);
	mgmt->frame_control =
		cpu_to_le16((WLAN_FC_TYPE_MGMT << 2) | (stype << 4));
	memcpy(mgmt->da, dst, ETH_ALEN);
	memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
	memcpy(mgmt->bssid, dst, ETH_ALEN);
	if (body)
		memcpy(skb_put(skb, bodylen), body, bodylen);

	meta = (struct hostap_skb_tx_data *) skb->cb;
	memset(meta, 0, sizeof(*meta));
	meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
	meta->iface = dev->priv;

	skb->dev = dev;
	skb->mac.raw = skb->nh.raw = skb->data;
	dev_queue_xmit(skb);

	return 0;
}


int prism2_sta_deauth(local_info_t *local, u16 reason)
{
	union iwreq_data wrqu;
	int ret;

	if (local->iw_mode != IW_MODE_INFRA ||
	    memcmp(local->bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0 ||
	    memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
		return 0;

	reason = cpu_to_le16(reason);
	ret = prism2_sta_send_mgmt(local, local->bssid, WLAN_FC_STYPE_DEAUTH,
				   (u8 *) &reason, 2);
	memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
	wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
	return ret;
}


struct proc_dir_entry *hostap_proc;

static int __init hostap_init(void)
{
	hostap_crypto_init();

	if (proc_net != NULL) {
		hostap_proc = proc_mkdir("hostap", proc_net);
		if (!hostap_proc)
			printk(KERN_WARNING "Failed to mkdir "
			       "/proc/net/hostap\n");
	} else
		hostap_proc = NULL;

	return 0;
}


static void __exit hostap_exit(void)
{
	if (hostap_proc != NULL) {
		hostap_proc = NULL;
		remove_proc_entry("hostap", proc_net);
	}

	hostap_crypto_deinit();
}


EXPORT_SYMBOL(hostap_set_word);
EXPORT_SYMBOL(hostap_set_string);
EXPORT_SYMBOL(hostap_get_porttype);
EXPORT_SYMBOL(hostap_set_encryption);
EXPORT_SYMBOL(hostap_set_antsel);
EXPORT_SYMBOL(hostap_set_roaming);
EXPORT_SYMBOL(hostap_set_auth_algs);
EXPORT_SYMBOL(hostap_dump_rx_header);
EXPORT_SYMBOL(hostap_dump_tx_header);
EXPORT_SYMBOL(hostap_80211_header_parse);
EXPORT_SYMBOL(hostap_80211_prism_header_parse);
EXPORT_SYMBOL(hostap_80211_get_hdrlen);
EXPORT_SYMBOL(hostap_get_stats);
EXPORT_SYMBOL(hostap_setup_dev);
EXPORT_SYMBOL(hostap_proc);
EXPORT_SYMBOL(hostap_set_multicast_list_queue);
EXPORT_SYMBOL(hostap_set_hostapd);
EXPORT_SYMBOL(hostap_set_hostapd_sta);
EXPORT_SYMBOL(hostap_add_interface);
EXPORT_SYMBOL(hostap_remove_interface);
EXPORT_SYMBOL(prism2_update_comms_qual);

module_init(hostap_init);
module_exit(hostap_exit);