Commit 3f552bbf authored by James Ketrenos's avatar James Ketrenos Committed by Jeff Garzik
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[PATCH] ieee82011: Added ieee80211_tx_frame to convert generic 802.11 data frames, and callbacks 



tree 40adc78b623ae70d56074934ec6334eb4f0ae6a5
parent db43d847bcebaa3df6414e26d0008eb21690e8cf
author James Ketrenos <jketreno@linux.intel.com> 1124445938 -0500
committer James Ketrenos <jketreno@linux.intel.com> 1127313102 -0500

Added ieee80211_tx_frame to convert generic 802.11 data frames into
txbs for transmission.

Added several purpose specific callbacks (handle_assoc, handle_auth,
etc.) which the driver can register with for being notified on
reception of variouf frame elements.

Signed-off-by: default avatarJames Ketrenos <jketreno@linux.intel.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@pobox.com>
parent 3cdd00c5

include/net/ieee80211.h

+23 −0
Original line number Diff line number Diff line
@@ -769,6 +769,27 @@ struct ieee80211_device { 
	int (*hard_start_xmit) (struct ieee80211_txb * txb,

				struct net_device * dev);

	int (*reset_port) (struct net_device * dev);

	int (*is_queue_full) (struct net_device * dev, int pri);



	/* Typical STA methods */

	int (*handle_auth) (struct net_device * dev,

			    struct ieee80211_auth * auth);

	int (*handle_disassoc) (struct net_device * dev,

				struct ieee80211_disassoc * assoc);

	int (*handle_beacon) (struct net_device * dev,

			      struct ieee80211_beacon * beacon,

			      struct ieee80211_network * network);

	int (*handle_probe_response) (struct net_device * dev,

				      struct ieee80211_probe_response * resp,

				      struct ieee80211_network * network);

	int (*handle_assoc_response) (struct net_device * dev,

				      struct ieee80211_assoc_response * resp,

				      struct ieee80211_network * network);



	/* Typical AP methods */

	int (*handle_assoc_request) (struct net_device * dev);

	int (*handle_reassoc_request) (struct net_device * dev,

				       struct ieee80211_reassoc_request * req);



	/* This must be the last item so that it points to the data

	 * allocated beyond this structure by alloc_ieee80211 */
@@ -877,6 +898,8 @@ extern int ieee80211_set_encryption(struct ieee80211_device *ieee); 
/* ieee80211_tx.c */

extern int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev);

extern void ieee80211_txb_free(struct ieee80211_txb *);

extern int ieee80211_tx_frame(struct ieee80211_device *ieee,

			      struct ieee80211_hdr *frame, int len);



/* ieee80211_rx.c */

extern int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,

net/ieee80211/ieee80211_rx.c

+43 −15
Original line number Diff line number Diff line
@@ -1029,12 +1029,18 @@ static inline void update_network(struct ieee80211_network *dst, 
	/* dst->last_associate is not overwritten */

}



static inline int is_beacon(int fc)

{

	return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);

}



static inline void ieee80211_process_probe_response(struct ieee80211_device

						    *ieee, struct

						    ieee80211_probe_response

						    *beacon, struct ieee80211_rx_stats

						    *stats)

{

	struct net_device *dev = ieee->dev;

	struct ieee80211_network network;

	struct ieee80211_network *target;

	struct ieee80211_network *oldest = NULL;
@@ -1070,11 +1076,10 @@ static inline void ieee80211_process_probe_response(struct ieee80211_device 
				     escape_essid(info_element->data,

						  info_element->len),

				     MAC_ARG(beacon->header.addr3),

				     WLAN_FC_GET_STYPE(le16_to_cpu

				     is_beacon(le16_to_cpu

					       (beacon->header.

							frame_ctl)) ==

				     IEEE80211_STYPE_PROBE_RESP ?

				     "PROBE RESPONSE" : "BEACON");

						frame_ctl)) ?

				     "BEACON" : "PROBE RESPONSE");

		return;

	}
@@ -1123,11 +1128,10 @@ static inline void ieee80211_process_probe_response(struct ieee80211_device 
				     escape_essid(network.ssid,

						  network.ssid_len),

				     MAC_ARG(network.bssid),

				     WLAN_FC_GET_STYPE(le16_to_cpu

				     is_beacon(le16_to_cpu

					       (beacon->header.

							frame_ctl)) ==

				     IEEE80211_STYPE_PROBE_RESP ?

				     "PROBE RESPONSE" : "BEACON");

						frame_ctl)) ?

				     "BEACON" : "PROBE RESPONSE");

#endif

		memcpy(target, &network, sizeof(*target));

		list_add_tail(&target->list, &ieee->network_list);
@@ -1136,15 +1140,22 @@ static inline void ieee80211_process_probe_response(struct ieee80211_device 
				     escape_essid(target->ssid,

						  target->ssid_len),

				     MAC_ARG(target->bssid),

				     WLAN_FC_GET_STYPE(le16_to_cpu

				     is_beacon(le16_to_cpu

					       (beacon->header.

							frame_ctl)) ==

				     IEEE80211_STYPE_PROBE_RESP ?

				     "PROBE RESPONSE" : "BEACON");

						frame_ctl)) ?

				     "BEACON" : "PROBE RESPONSE");

		update_network(target, &network);

	}



	spin_unlock_irqrestore(&ieee->lock, flags);



	if (is_beacon(le16_to_cpu(beacon->header.frame_ctl))) {

		if (ieee->handle_beacon != NULL)

			ieee->handle_beacon(dev, beacon, &network);

	} else {

		if (ieee->handle_probe_response != NULL)

			ieee->handle_probe_response(dev, beacon, &network);

	}

}



void ieee80211_rx_mgt(struct ieee80211_device *ieee,
@@ -1185,6 +1196,23 @@ void ieee80211_rx_mgt(struct ieee80211_device *ieee, 
						  ieee80211_probe_response *)

						 header, stats);

		break;

	case IEEE80211_STYPE_AUTH:



		IEEE80211_DEBUG_MGMT("recieved auth (%d)\n",

				     WLAN_FC_GET_STYPE(le16_to_cpu

						       (header->frame_ctl)));



		if (ieee->handle_auth != NULL)

			ieee->handle_auth(ieee->dev,

					  (struct ieee80211_auth *)header);

		break;



	case IEEE80211_STYPE_DISASSOC:

		if (ieee->handle_disassoc != NULL)

			ieee->handle_disassoc(ieee->dev,

					      (struct ieee80211_disassoc *)

					      header);

		break;



	default:

		IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",

net/ieee80211/ieee80211_tx.c

+64 −0
Original line number Diff line number Diff line
@@ -459,7 +459,71 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev) 
	netif_stop_queue(dev);

	stats->tx_errors++;

	return 1;

}



/* Incoming 802.11 strucure is converted to a TXB

 * a block of 802.11 fragment packets (stored as skbs) */

int ieee80211_tx_frame(struct ieee80211_device *ieee,

		       struct ieee80211_hdr *frame, int len)

{

	struct ieee80211_txb *txb = NULL;

	unsigned long flags;

	struct net_device_stats *stats = &ieee->stats;

	struct sk_buff *skb_frag;



	spin_lock_irqsave(&ieee->lock, flags);



	/* If there is no driver handler to take the TXB, dont' bother

	 * creating it... */

	if (!ieee->hard_start_xmit) {

		printk(KERN_WARNING "%s: No xmit handler.\n", ieee->dev->name);

		goto success;

	}



	if (unlikely(len < 24)) {

		printk(KERN_WARNING "%s: skb too small (%d).\n",

		       ieee->dev->name, len);

		goto success;

	}



	/* When we allocate the TXB we allocate enough space for the reserve

	 * and full fragment bytes (bytes_per_frag doesn't include prefix,

	 * postfix, header, FCS, etc.) */

	txb = ieee80211_alloc_txb(1, len, GFP_ATOMIC);

	if (unlikely(!txb)) {

		printk(KERN_WARNING "%s: Could not allocate TXB\n",

		       ieee->dev->name);

		goto failed;

	}

	txb->encrypted = 0;

	txb->payload_size = len;



	skb_frag = txb->fragments[0];



	memcpy(skb_put(skb_frag, len), frame, len);



	if (ieee->config &

	    (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))

		skb_put(skb_frag, 4);



      success:

	spin_unlock_irqrestore(&ieee->lock, flags);



	if (txb) {

		if ((*ieee->hard_start_xmit) (txb, ieee->dev) == 0) {

			stats->tx_packets++;

			stats->tx_bytes += txb->payload_size;

			return 0;

		}

		ieee80211_txb_free(txb);

	}

	return 0;



      failed:

	spin_unlock_irqrestore(&ieee->lock, flags);

	stats->tx_errors++;

	return 1;

}



EXPORT_SYMBOL(ieee80211_tx_frame);

EXPORT_SYMBOL(ieee80211_txb_free);

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