hostap_main.c

linux内核源码

	       fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
	       __le16_to_cpu(tx->duration_id), __le16_to_cpu(tx->seq_ctrl),
	       __le16_to_cpu(tx->data_len),
	       fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
	       fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");

	printk(KERN_DEBUG "   A1=%s A2=%s A3=%s A4=%s\n",
	       print_mac(mac, tx->addr1), print_mac(mac2, tx->addr2),
	       print_mac(mac3, tx->addr3), print_mac(mac4, tx->addr4));

	printk(KERN_DEBUG "   dst=%s src=%s len=%d\n",
	       print_mac(mac, tx->dst_addr), print_mac(mac2, tx->src_addr),
	       __be16_to_cpu(tx->len));
}


int hostap_80211_header_parse(const struct sk_buff *skb, unsigned char *haddr)
{
	struct hostap_interface *iface = netdev_priv(skb->dev);
	local_info_t *local = iface->local;

	if (local->monitor_type == PRISM2_MONITOR_PRISM ||
	    local->monitor_type == PRISM2_MONITOR_CAPHDR) {
		const unsigned char *mac = skb_mac_header(skb);

		if (*(u32 *)mac == LWNG_CAP_DID_BASE) {
			memcpy(haddr,
			       mac + sizeof(struct linux_wlan_ng_prism_hdr) + 10,
			       ETH_ALEN); /* addr2 */
		} else { /* (*(u32 *)mac == htonl(LWNG_CAPHDR_VERSION)) */
			memcpy(haddr,
			       mac + sizeof(struct linux_wlan_ng_cap_hdr) + 10,
			       ETH_ALEN); /* addr2 */
		}
	} else
		memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */

	return ETH_ALEN;
}


int hostap_80211_get_hdrlen(u16 fc)
{
	int hdrlen = 24;

	switch (WLAN_FC_GET_TYPE(fc)) {
	case IEEE80211_FTYPE_DATA:
		if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
			hdrlen = 30; /* Addr4 */
		break;
	case IEEE80211_FTYPE_CTL:
		switch (WLAN_FC_GET_STYPE(fc)) {
		case IEEE80211_STYPE_CTS:
		case IEEE80211_STYPE_ACK:
			hdrlen = 10;
			break;
		default:
			hdrlen = 16;
			break;
		}
		break;
	}

	return hdrlen;
}


struct net_device_stats *hostap_get_stats(struct net_device *dev)
{
	struct hostap_interface *iface;
	iface = netdev_priv(dev);
	return &iface->stats;
}


static int prism2_close(struct net_device *dev)
{
	struct hostap_interface *iface;
	local_info_t *local;

	PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);

	iface = netdev_priv(dev);
	local = iface->local;

	if (dev == local->ddev) {
		prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
	}
#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
	if (!local->hostapd && dev == local->dev &&
	    (!local->func->card_present || local->func->card_present(local)) &&
	    local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
		hostap_deauth_all_stas(dev, local->ap, 1);
#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */

	if (dev == local->dev) {
		local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
	}

	if (netif_running(dev)) {
		netif_stop_queue(dev);
		netif_device_detach(dev);
	}

	flush_scheduled_work();

	module_put(local->hw_module);

	local->num_dev_open--;

	if (dev != local->dev && local->dev->flags & IFF_UP &&
	    local->master_dev_auto_open && local->num_dev_open == 1) {
		/* Close master radio interface automatically if it was also
		 * opened automatically and we are now closing the last
		 * remaining non-master device. */
		dev_close(local->dev);
	}

	return 0;
}


static int prism2_open(struct net_device *dev)
{
	struct hostap_interface *iface;
	local_info_t *local;

	PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);

	iface = netdev_priv(dev);
	local = iface->local;

	if (local->no_pri) {
		printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
		       "f/w\n", dev->name);
		return 1;
	}

	if ((local->func->card_present && !local->func->card_present(local)) ||
	    local->hw_downloading)
		return -ENODEV;

	if (!try_module_get(local->hw_module))
		return -ENODEV;
	local->num_dev_open++;

	if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
		printk(KERN_WARNING "%s: could not enable MAC port\n",
		       dev->name);
		prism2_close(dev);
		return 1;
	}
	if (!local->dev_enabled)
		prism2_callback(local, PRISM2_CALLBACK_ENABLE);
	local->dev_enabled = 1;

	if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
		/* Master radio interface is needed for all operation, so open
		 * it automatically when any virtual net_device is opened. */
		local->master_dev_auto_open = 1;
		dev_open(local->dev);
	}

	netif_device_attach(dev);
	netif_start_queue(dev);

	return 0;
}


static int prism2_set_mac_address(struct net_device *dev, void *p)
{
	struct hostap_interface *iface;
	local_info_t *local;
	struct list_head *ptr;
	struct sockaddr *addr = p;

	iface = netdev_priv(dev);
	local = iface->local;

	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;
}


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

	iface = netdev_priv(dev);
	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");
	}
}


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;
	local_info_t *local;

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

	schedule_work(&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;
}


static void prism2_tx_timeout(struct net_device *dev)
{
	struct hostap_interface *iface;
	local_info_t *local;
	struct hfa384x_regs regs;

	iface = netdev_priv(dev);
	local = iface->local;

	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);
}

const struct header_ops hostap_80211_ops = {
	.create		= eth_header,
	.rebuild	= eth_rebuild_header,
	.cache		= eth_header_cache,
	.cache_update	= eth_header_cache_update,

	.parse		= hostap_80211_header_parse,
};
EXPORT_SYMBOL(hostap_80211_ops);

void hostap_setup_dev(struct net_device *dev, local_info_t *local,
		      int type)
{
	struct hostap_interface *iface;

	iface = netdev_priv(dev);
	ether_setup(dev);

	/* kernel callbacks */
	dev->get_stats = hostap_get_stats;
	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;
	}
	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->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;

	if (type == HOSTAP_INTERFACE_AP) {
		dev->hard_start_xmit = hostap_mgmt_start_xmit;
		dev->type = ARPHRD_IEEE80211;
		dev->header_ops = &hostap_80211_ops;
	} else {
		dev->hard_start_xmit = hostap_data_start_xmit;
	}

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

	SET_ETHTOOL_OPS(dev, &prism2_ethtool_ops);

	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;

	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;
	local_info_t *local;
	int ret = 0;
	struct hfa384x_comms_quality sq;

	iface = netdev_priv(dev);
	local = iface->local;
	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, u16 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(IEEE80211_FTYPE_MGMT | stype);
	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 = netdev_priv(dev);

	skb->dev = dev;
	skb_reset_mac_header(skb);
	skb_reset_network_header(skb);
	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, IEEE80211_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)
{
	if (init_net.proc_net != NULL) {
		hostap_proc = proc_mkdir("hostap", init_net.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", init_net.proc_net);
	}
}


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_get_hdrlen);
EXPORT_SYMBOL(hostap_get_stats);
EXPORT_SYMBOL(hostap_setup_dev);
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);