X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fnet%2Fwireless%2Fipw2200.c;h=94172558cd03a879440d88e749f9aabb2ebf6c56;hb=d685b8c226727bf5db907c7241f55461e7f1f008;hp=11730448a8210c50d61aef5619f523f04d43a1d0;hpb=c6c33a779dfe7aa8254be4da08c217914f1390a0;p=karo-tx-linux.git

diff --git a/drivers/net/wireless/ipw2200.c b/drivers/net/wireless/ipw2200.c
index 11730448a821..94172558cd03 100644
--- a/drivers/net/wireless/ipw2200.c
+++ b/drivers/net/wireless/ipw2200.c
@@ -65,6 +65,11 @@ static const char ipw_modes[] = {
 };
 static int antenna = CFG_SYS_ANTENNA_BOTH;
 
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+static int rtap_iface = 0;     /* def: 0 -- do not create rtap interface */
+#endif
+
+
 #ifdef CONFIG_IPW_QOS
 static int qos_enable = 0;
 static int qos_burst_enable = 0;
@@ -1272,6 +1277,105 @@ static ssize_t show_cmd_log(struct device *d,
 
 static DEVICE_ATTR(cmd_log, S_IRUGO, show_cmd_log, NULL);
 
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+static void ipw_prom_free(struct ipw_priv *priv);
+static int ipw_prom_alloc(struct ipw_priv *priv);
+static ssize_t store_rtap_iface(struct device *d,
+			 struct device_attribute *attr,
+			 const char *buf, size_t count)
+{
+	struct ipw_priv *priv = dev_get_drvdata(d);
+	int rc = 0;
+
+	if (count < 1)
+		return -EINVAL;
+
+	switch (buf[0]) {
+	case '0':
+		if (!rtap_iface)
+			return count;
+
+		if (netif_running(priv->prom_net_dev)) {
+			IPW_WARNING("Interface is up.  Cannot unregister.\n");
+			return count;
+		}
+
+		ipw_prom_free(priv);
+		rtap_iface = 0;
+		break;
+
+	case '1':
+		if (rtap_iface)
+			return count;
+
+		rc = ipw_prom_alloc(priv);
+		if (!rc)
+			rtap_iface = 1;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	if (rc) {
+		IPW_ERROR("Failed to register promiscuous network "
+			  "device (error %d).\n", rc);
+	}
+
+	return count;
+}
+
+static ssize_t show_rtap_iface(struct device *d,
+			struct device_attribute *attr,
+			char *buf)
+{
+	struct ipw_priv *priv = dev_get_drvdata(d);
+	if (rtap_iface)
+		return sprintf(buf, "%s", priv->prom_net_dev->name);
+	else {
+		buf[0] = '-';
+		buf[1] = '1';
+		buf[2] = '\0';
+		return 3;
+	}
+}
+
+static DEVICE_ATTR(rtap_iface, S_IWUSR | S_IRUSR, show_rtap_iface,
+		   store_rtap_iface);
+
+static ssize_t store_rtap_filter(struct device *d,
+			 struct device_attribute *attr,
+			 const char *buf, size_t count)
+{
+	struct ipw_priv *priv = dev_get_drvdata(d);
+
+	if (!priv->prom_priv) {
+		IPW_ERROR("Attempting to set filter without "
+			  "rtap_iface enabled.\n");
+		return -EPERM;
+	}
+
+	priv->prom_priv->filter = simple_strtol(buf, NULL, 0);
+
+	IPW_DEBUG_INFO("Setting rtap filter to " BIT_FMT16 "\n",
+		       BIT_ARG16(priv->prom_priv->filter));
+
+	return count;
+}
+
+static ssize_t show_rtap_filter(struct device *d,
+			struct device_attribute *attr,
+			char *buf)
+{
+	struct ipw_priv *priv = dev_get_drvdata(d);
+	return sprintf(buf, "0x%04X",
+		       priv->prom_priv ? priv->prom_priv->filter : 0);
+}
+
+static DEVICE_ATTR(rtap_filter, S_IWUSR | S_IRUSR, show_rtap_filter,
+		   store_rtap_filter);
+#endif
+
 static ssize_t show_scan_age(struct device *d, struct device_attribute *attr,
 			     char *buf)
 {
@@ -2028,16 +2132,11 @@ static int ipw_send_host_complete(struct ipw_priv *priv)
 	return ipw_send_cmd_simple(priv, IPW_CMD_HOST_COMPLETE);
 }
 
-static int ipw_send_system_config(struct ipw_priv *priv,
-				  struct ipw_sys_config *config)
+static int ipw_send_system_config(struct ipw_priv *priv)
 {
-	if (!priv || !config) {
-		IPW_ERROR("Invalid args\n");
-		return -1;
-	}
-
-	return ipw_send_cmd_pdu(priv, IPW_CMD_SYSTEM_CONFIG, sizeof(*config),
-				config);
+	return ipw_send_cmd_pdu(priv, IPW_CMD_SYSTEM_CONFIG,
+				sizeof(priv->sys_config),
+				&priv->sys_config);
 }
 
 static int ipw_send_ssid(struct ipw_priv *priv, u8 * ssid, int len)
@@ -3704,7 +3803,17 @@ static void ipw_bg_disassociate(void *data)
 static void ipw_system_config(void *data)
 {
 	struct ipw_priv *priv = data;
-	ipw_send_system_config(priv, &priv->sys_config);
+
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+	if (priv->prom_net_dev && netif_running(priv->prom_net_dev)) {
+		priv->sys_config.accept_all_data_frames = 1;
+		priv->sys_config.accept_non_directed_frames = 1;
+		priv->sys_config.accept_all_mgmt_bcpr = 1;
+		priv->sys_config.accept_all_mgmt_frames = 1;
+	}
+#endif
+
+	ipw_send_system_config(priv);
 }
 
 struct ipw_status_code {
@@ -7138,7 +7247,7 @@ static int ipw_associate_network(struct ipw_priv *priv,
 	else
 		priv->sys_config.answer_broadcast_ssid_probe = 0;
 
-	err = ipw_send_system_config(priv, &priv->sys_config);
+	err = ipw_send_system_config(priv);
 	if (err) {
 		IPW_DEBUG_HC("Attempt to send sys config command failed.\n");
 		return err;
@@ -7454,15 +7563,7 @@ static void ipw_handle_data_packet_monitor(struct ipw_priv *priv,
 	/* Magic struct that slots into the radiotap header -- no reason
 	 * to build this manually element by element, we can write it much
 	 * more efficiently than we can parse it. ORDER MATTERS HERE */
-	struct ipw_rt_hdr {
-		struct ieee80211_radiotap_header rt_hdr;
-		u8 rt_flags;	/* radiotap packet flags */
-		u8 rt_rate;	/* rate in 500kb/s */
-		u16 rt_channel;	/* channel in mhz */
-		u16 rt_chbitmask;	/* channel bitfield */
-		s8 rt_dbmsignal;	/* signal in dbM, kluged to signed */
-		u8 rt_antenna;	/* antenna number */
-	} *ipw_rt;
+	struct ipw_rt_hdr *ipw_rt;
 
 	short len = le16_to_cpu(pkt->u.frame.length);
 
@@ -7516,9 +7617,11 @@ static void ipw_handle_data_packet_monitor(struct ipw_priv *priv,
 	/* Big bitfield of all the fields we provide in radiotap */
 	ipw_rt->rt_hdr.it_present =
 	    ((1 << IEEE80211_RADIOTAP_FLAGS) |
+	     (1 << IEEE80211_RADIOTAP_TSFT) |
 	     (1 << IEEE80211_RADIOTAP_RATE) |
 	     (1 << IEEE80211_RADIOTAP_CHANNEL) |
 	     (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
+	     (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
 	     (1 << IEEE80211_RADIOTAP_ANTENNA));
 
 	/* Zero the flags, we'll add to them as we go */
@@ -7604,6 +7707,220 @@ static void ipw_handle_data_packet_monitor(struct ipw_priv *priv,
 }
 #endif
 
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+#define ieee80211_is_probe_response(fc) \
+   ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT && \
+    (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP )
+
+#define ieee80211_is_management(fc) \
+   ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
+
+#define ieee80211_is_control(fc) \
+   ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
+
+#define ieee80211_is_data(fc) \
+   ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)
+
+#define ieee80211_is_assoc_request(fc) \
+   ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ)
+
+#define ieee80211_is_reassoc_request(fc) \
+   ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
+
+static void ipw_handle_promiscuous_rx(struct ipw_priv *priv,
+				      struct ipw_rx_mem_buffer *rxb,
+				      struct ieee80211_rx_stats *stats)
+{
+	struct ipw_rx_packet *pkt = (struct ipw_rx_packet *)rxb->skb->data;
+	struct ipw_rx_frame *frame = &pkt->u.frame;
+	struct ipw_rt_hdr *ipw_rt;
+
+	/* First cache any information we need before we overwrite
+	 * the information provided in the skb from the hardware */
+	struct ieee80211_hdr *hdr;
+	u16 channel = frame->received_channel;
+	u8 phy_flags = frame->antennaAndPhy;
+	s8 signal = frame->rssi_dbm - IPW_RSSI_TO_DBM;
+	s8 noise = frame->noise;
+	u8 rate = frame->rate;
+	short len = le16_to_cpu(pkt->u.frame.length);
+	u64 tsf = 0;
+	struct sk_buff *skb;
+	int hdr_only = 0;
+	u16 filter = priv->prom_priv->filter;
+
+	/* If the filter is set to not include Rx frames then return */
+	if (filter & IPW_PROM_NO_RX)
+		return;
+
+	if (!noise)
+		noise = priv->last_noise;
+
+	/* We received data from the HW, so stop the watchdog */
+	priv->prom_net_dev->trans_start = jiffies;
+
+	if (unlikely((len + IPW_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
+		priv->prom_priv->ieee->stats.rx_errors++;
+		IPW_DEBUG_DROP("Corruption detected! Oh no!\n");
+		return;
+	}
+
+	/* We only process data packets if the interface is open */
+	if (unlikely(!netif_running(priv->prom_net_dev))) {
+		priv->prom_priv->ieee->stats.rx_dropped++;
+		IPW_DEBUG_DROP("Dropping packet while interface is not up.\n");
+		return;
+	}
+
+	/* Libpcap 0.9.3+ can handle variable length radiotap, so we'll use
+	 * that now */
+	if (len > IPW_RX_BUF_SIZE - sizeof(struct ipw_rt_hdr)) {
+		/* FIXME: Should alloc bigger skb instead */
+		priv->prom_priv->ieee->stats.rx_dropped++;
+		IPW_DEBUG_DROP("Dropping too large packet in monitor\n");
+		return;
+	}
+
+	hdr = (void *)rxb->skb->data + IPW_RX_FRAME_SIZE;
+	if (ieee80211_is_management(hdr->frame_ctl)) {
+		if (filter & IPW_PROM_NO_MGMT)
+			return;
+		if (filter & IPW_PROM_MGMT_HEADER_ONLY)
+			hdr_only = 1;
+	} else if (ieee80211_is_control(hdr->frame_ctl)) {
+		if (filter & IPW_PROM_NO_CTL)
+			return;
+		if (filter & IPW_PROM_CTL_HEADER_ONLY)
+			hdr_only = 1;
+	} else if (ieee80211_is_data(hdr->frame_ctl)) {
+		if (filter & IPW_PROM_NO_DATA)
+			return;
+		if (filter & IPW_PROM_DATA_HEADER_ONLY)
+			hdr_only = 1;
+	}
+
+	/* Copy the SKB since this is for the promiscuous side */
+	skb = skb_copy(rxb->skb, GFP_ATOMIC);
+	if (skb == NULL) {
+		IPW_ERROR("skb_clone failed for promiscuous copy.\n");
+		return;
+	}
+
+	/* copy the frame data to write after where the radiotap header goes */
+	ipw_rt = (void *)skb->data;
+
+	if (hdr_only)
+		len = ieee80211_get_hdrlen(hdr->frame_ctl);
+
+	memcpy(ipw_rt->payload, hdr, len);
+
+	/* Zero the radiotap static buffer  ...  We only need to zero the bytes
+	 * NOT part of our real header, saves a little time.
+	 *
+	 * No longer necessary since we fill in all our data.  Purge before
+	 * merging patch officially.
+	 * memset(rxb->skb->data + sizeof(struct ipw_rt_hdr), 0,
+	 *        IEEE80211_RADIOTAP_HDRLEN - sizeof(struct ipw_rt_hdr));
+	 */
+
+	ipw_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
+	ipw_rt->rt_hdr.it_pad = 0;	/* always good to zero */
+	ipw_rt->rt_hdr.it_len = sizeof(*ipw_rt);	/* total header+data */
+
+	/* Set the size of the skb to the size of the frame */
+	skb_put(skb, ipw_rt->rt_hdr.it_len + len);
+
+	/* Big bitfield of all the fields we provide in radiotap */
+	ipw_rt->rt_hdr.it_present =
+	    ((1 << IEEE80211_RADIOTAP_FLAGS) |
+	     (1 << IEEE80211_RADIOTAP_TSFT) |
+	     (1 << IEEE80211_RADIOTAP_RATE) |
+	     (1 << IEEE80211_RADIOTAP_CHANNEL) |
+	     (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
+	     (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
+	     (1 << IEEE80211_RADIOTAP_ANTENNA));
+
+	/* Zero the flags, we'll add to them as we go */
+	ipw_rt->rt_flags = 0;
+
+	ipw_rt->rt_tsf = tsf;
+
+	/* Convert to DBM */
+	ipw_rt->rt_dbmsignal = signal;
+	ipw_rt->rt_dbmnoise = noise;
+
+	/* Convert the channel data and set the flags */
+	ipw_rt->rt_channel = cpu_to_le16(ieee80211chan2mhz(channel));
+	if (channel > 14) {	/* 802.11a */
+		ipw_rt->rt_chbitmask =
+		    cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
+	} else if (phy_flags & (1 << 5)) {	/* 802.11b */
+		ipw_rt->rt_chbitmask =
+		    cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
+	} else {		/* 802.11g */
+		ipw_rt->rt_chbitmask =
+		    (IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ);
+	}
+
+	/* set the rate in multiples of 500k/s */
+	switch (rate) {
+	case IPW_TX_RATE_1MB:
+		ipw_rt->rt_rate = 2;
+		break;
+	case IPW_TX_RATE_2MB:
+		ipw_rt->rt_rate = 4;
+		break;
+	case IPW_TX_RATE_5MB:
+		ipw_rt->rt_rate = 10;
+		break;
+	case IPW_TX_RATE_6MB:
+		ipw_rt->rt_rate = 12;
+		break;
+	case IPW_TX_RATE_9MB:
+		ipw_rt->rt_rate = 18;
+		break;
+	case IPW_TX_RATE_11MB:
+		ipw_rt->rt_rate = 22;
+		break;
+	case IPW_TX_RATE_12MB:
+		ipw_rt->rt_rate = 24;
+		break;
+	case IPW_TX_RATE_18MB:
+		ipw_rt->rt_rate = 36;
+		break;
+	case IPW_TX_RATE_24MB:
+		ipw_rt->rt_rate = 48;
+		break;
+	case IPW_TX_RATE_36MB:
+		ipw_rt->rt_rate = 72;
+		break;
+	case IPW_TX_RATE_48MB:
+		ipw_rt->rt_rate = 96;
+		break;
+	case IPW_TX_RATE_54MB:
+		ipw_rt->rt_rate = 108;
+		break;
+	default:
+		ipw_rt->rt_rate = 0;
+		break;
+	}
+
+	/* antenna number */
+	ipw_rt->rt_antenna = (phy_flags & 3);
+
+	/* set the preamble flag if we have it */
+	if (phy_flags & (1 << 6))
+		ipw_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
+
+	IPW_DEBUG_RX("Rx packet of %d bytes.\n", skb->len);
+
+	if (!ieee80211_rx(priv->prom_priv->ieee, skb, stats)) {
+		priv->prom_priv->ieee->stats.rx_errors++;
+		dev_kfree_skb_any(skb);
+	}
+}
+#endif
+
 static int is_network_packet(struct ipw_priv *priv,
 				    struct ieee80211_hdr_4addr *header)
 {
@@ -7830,15 +8147,21 @@ static void ipw_rx(struct ipw_priv *priv)
 
 				priv->rx_packets++;
 
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+	if (priv->prom_net_dev && netif_running(priv->prom_net_dev))
+		ipw_handle_promiscuous_rx(priv, rxb, &stats);
+#endif
+
 #ifdef CONFIG_IPW2200_MONITOR
 				if (priv->ieee->iw_mode == IW_MODE_MONITOR) {
 #ifdef CONFIG_IEEE80211_RADIOTAP
-					ipw_handle_data_packet_monitor(priv,
-								       rxb,
-								       &stats);
+
+                ipw_handle_data_packet_monitor(priv,
+					       rxb,
+					       &stats);
 #else
-					ipw_handle_data_packet(priv, rxb,
-							       &stats);
+		ipw_handle_data_packet(priv, rxb,
+				       &stats);
 #endif
 					break;
 				}
@@ -9880,6 +10203,88 @@ static int ipw_net_is_queue_full(struct net_device *dev, int pri)
 	return 0;
 }
 
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+static void ipw_handle_promiscuous_tx(struct ipw_priv *priv,
+				      struct ieee80211_txb *txb)
+{
+	struct ieee80211_rx_stats dummystats;
+	struct ieee80211_hdr *hdr;
+	u8 n;
+	u16 filter = priv->prom_priv->filter;
+	int hdr_only = 0;
+
+	if (filter & IPW_PROM_NO_TX)
+		return;
+
+	memset(&dummystats, 0, sizeof(dummystats));
+
+	/* Filtering of fragment chains is done agains the first fragment */
+	hdr = (void *)txb->fragments[0]->data;
+	if (ieee80211_is_management(hdr->frame_ctl)) {
+		if (filter & IPW_PROM_NO_MGMT)
+			return;
+		if (filter & IPW_PROM_MGMT_HEADER_ONLY)
+			hdr_only = 1;
+	} else if (ieee80211_is_control(hdr->frame_ctl)) {
+		if (filter & IPW_PROM_NO_CTL)
+			return;
+		if (filter & IPW_PROM_CTL_HEADER_ONLY)
+			hdr_only = 1;
+	} else if (ieee80211_is_data(hdr->frame_ctl)) {
+		if (filter & IPW_PROM_NO_DATA)
+			return;
+		if (filter & IPW_PROM_DATA_HEADER_ONLY)
+			hdr_only = 1;
+	}
+
+	for(n=0; n<txb->nr_frags; ++n) {
+		struct sk_buff *src = txb->fragments[n];
+		struct sk_buff *dst;
+		struct ieee80211_radiotap_header *rt_hdr;
+		int len;
+
+		if (hdr_only) {
+			hdr = (void *)src->data;
+			len = ieee80211_get_hdrlen(hdr->frame_ctl);
+		} else
+			len = src->len;
+
+		dst = alloc_skb(
+			len + IEEE80211_RADIOTAP_HDRLEN, GFP_ATOMIC);
+		if (!dst) continue;
+
+		rt_hdr = (void *)skb_put(dst, sizeof(*rt_hdr));
+
+		rt_hdr->it_version = PKTHDR_RADIOTAP_VERSION;
+		rt_hdr->it_pad = 0;
+		rt_hdr->it_present = 0; /* after all, it's just an idea */
+		rt_hdr->it_present |=  (1 << IEEE80211_RADIOTAP_CHANNEL);
+
+		*(u16*)skb_put(dst, sizeof(u16)) = cpu_to_le16(
+			ieee80211chan2mhz(priv->channel));
+		if (priv->channel > 14) 	/* 802.11a */
+			*(u16*)skb_put(dst, sizeof(u16)) =
+				cpu_to_le16(IEEE80211_CHAN_OFDM |
+					     IEEE80211_CHAN_5GHZ);
+		else if (priv->ieee->mode == IEEE_B) /* 802.11b */
+			*(u16*)skb_put(dst, sizeof(u16)) =
+				cpu_to_le16(IEEE80211_CHAN_CCK |
+					     IEEE80211_CHAN_2GHZ);
+		else 		/* 802.11g */
+			*(u16*)skb_put(dst, sizeof(u16)) =
+				cpu_to_le16(IEEE80211_CHAN_OFDM |
+				 IEEE80211_CHAN_2GHZ);
+
+		rt_hdr->it_len = dst->len;
+
+		memcpy(skb_put(dst, len), src->data, len);
+
+		if (!ieee80211_rx(priv->prom_priv->ieee, dst, &dummystats))
+			dev_kfree_skb_any(dst);
+	}
+}
+#endif
+
 static int ipw_net_hard_start_xmit(struct ieee80211_txb *txb,
 				   struct net_device *dev, int pri)
 {
@@ -9897,6 +10302,11 @@ static int ipw_net_hard_start_xmit(struct ieee80211_txb *txb,
 		goto fail_unlock;
 	}
 
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+	if (rtap_iface && netif_running(priv->prom_net_dev))
+		ipw_handle_promiscuous_tx(priv, txb);
+#endif
+
 	ret = ipw_tx_skb(priv, txb, pri);
 	if (ret == NETDEV_TX_OK)
 		__ipw_led_activity_on(priv);
@@ -10344,12 +10754,21 @@ static int ipw_config(struct ipw_priv *priv)
 			    |= CFG_BT_COEXISTENCE_OOB;
 	}
 
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+	if (priv->prom_net_dev && netif_running(priv->prom_net_dev)) {
+		priv->sys_config.accept_all_data_frames = 1;
+		priv->sys_config.accept_non_directed_frames = 1;
+		priv->sys_config.accept_all_mgmt_bcpr = 1;
+		priv->sys_config.accept_all_mgmt_frames = 1;
+	}
+#endif
+
 	if (priv->ieee->iw_mode == IW_MODE_ADHOC)
 		priv->sys_config.answer_broadcast_ssid_probe = 1;
 	else
 		priv->sys_config.answer_broadcast_ssid_probe = 0;
 
-	if (ipw_send_system_config(priv, &priv->sys_config))
+	if (ipw_send_system_config(priv))
 		goto error;
 
 	init_supported_rates(priv, &priv->rates);
@@ -10887,6 +11306,10 @@ static struct attribute *ipw_sysfs_entries[] = {
 	&dev_attr_led.attr,
 	&dev_attr_speed_scan.attr,
 	&dev_attr_net_stats.attr,
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+	&dev_attr_rtap_iface.attr,
+	&dev_attr_rtap_filter.attr,
+#endif
 	NULL
 };
 
@@ -10895,6 +11318,109 @@ static struct attribute_group ipw_attribute_group = {
 	.attrs = ipw_sysfs_entries,
 };
 
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+static int ipw_prom_open(struct net_device *dev)
+{
+	struct ipw_prom_priv *prom_priv = ieee80211_priv(dev);
+	struct ipw_priv *priv = prom_priv->priv;
+
+	IPW_DEBUG_INFO("prom dev->open\n");
+	netif_carrier_off(dev);
+	netif_stop_queue(dev);
+
+	if (priv->ieee->iw_mode != IW_MODE_MONITOR) {
+		priv->sys_config.accept_all_data_frames = 1;
+		priv->sys_config.accept_non_directed_frames = 1;
+		priv->sys_config.accept_all_mgmt_bcpr = 1;
+		priv->sys_config.accept_all_mgmt_frames = 1;
+
+		ipw_send_system_config(priv);
+	}
+
+	return 0;
+}
+
+static int ipw_prom_stop(struct net_device *dev)
+{
+	struct ipw_prom_priv *prom_priv = ieee80211_priv(dev);
+	struct ipw_priv *priv = prom_priv->priv;
+
+	IPW_DEBUG_INFO("prom dev->stop\n");
+
+	if (priv->ieee->iw_mode != IW_MODE_MONITOR) {
+		priv->sys_config.accept_all_data_frames = 0;
+		priv->sys_config.accept_non_directed_frames = 0;
+		priv->sys_config.accept_all_mgmt_bcpr = 0;
+		priv->sys_config.accept_all_mgmt_frames = 0;
+
+		ipw_send_system_config(priv);
+	}
+
+	return 0;
+}
+
+static int ipw_prom_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	IPW_DEBUG_INFO("prom dev->xmit\n");
+	netif_stop_queue(dev);
+	return -EOPNOTSUPP;
+}
+
+static struct net_device_stats *ipw_prom_get_stats(struct net_device *dev)
+{
+	struct ipw_prom_priv *prom_priv = ieee80211_priv(dev);
+	return &prom_priv->ieee->stats;
+}
+
+static int ipw_prom_alloc(struct ipw_priv *priv)
+{
+	int rc = 0;
+
+	if (priv->prom_net_dev)
+		return -EPERM;
+
+	priv->prom_net_dev = alloc_ieee80211(sizeof(struct ipw_prom_priv));
+	if (priv->prom_net_dev == NULL)
+		return -ENOMEM;
+
+	priv->prom_priv = ieee80211_priv(priv->prom_net_dev);
+	priv->prom_priv->ieee = netdev_priv(priv->prom_net_dev);
+	priv->prom_priv->priv = priv;
+
+	strcpy(priv->prom_net_dev->name, "rtap%d");
+
+	priv->prom_net_dev->type = ARPHRD_IEEE80211_RADIOTAP;
+	priv->prom_net_dev->open = ipw_prom_open;
+	priv->prom_net_dev->stop = ipw_prom_stop;
+	priv->prom_net_dev->get_stats = ipw_prom_get_stats;
+	priv->prom_net_dev->hard_start_xmit = ipw_prom_hard_start_xmit;
+
+	priv->prom_priv->ieee->iw_mode = IW_MODE_MONITOR;
+
+	rc = register_netdev(priv->prom_net_dev);
+	if (rc) {
+		free_ieee80211(priv->prom_net_dev);
+		priv->prom_net_dev = NULL;
+		return rc;
+	}
+
+	return 0;
+}
+
+static void ipw_prom_free(struct ipw_priv *priv)
+{
+	if (!priv->prom_net_dev)
+		return;
+
+	unregister_netdev(priv->prom_net_dev);
+	free_ieee80211(priv->prom_net_dev);
+
+	priv->prom_net_dev = NULL;
+}
+
+#endif
+
+
 static int ipw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	int err = 0;
@@ -11025,6 +11551,18 @@ static int ipw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto out_remove_sysfs;
 	}
 
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+	if (rtap_iface) {
+	        err = ipw_prom_alloc(priv);
+		if (err) {
+			IPW_ERROR("Failed to register promiscuous network "
+				  "device (error %d).\n", err);
+			unregister_netdev(priv->net_dev);
+			goto out_remove_sysfs;
+		}
+	}
+#endif
+
 	printk(KERN_INFO DRV_NAME ": Detected geography %s (%d 802.11bg "
 	       "channels, %d 802.11a channels)\n",
 	       priv->ieee->geo.name, priv->ieee->geo.bg_channels,
@@ -11104,6 +11642,10 @@ static void ipw_pci_remove(struct pci_dev *pdev)
 		priv->error = NULL;
 	}
 
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+	ipw_prom_free(priv);
+#endif
+
 	free_irq(pdev->irq, priv);
 	iounmap(priv->hw_base);
 	pci_release_regions(pdev);
@@ -11228,6 +11770,11 @@ MODULE_PARM_DESC(debug, "debug output mask");
 module_param(channel, int, 0444);
 MODULE_PARM_DESC(channel, "channel to limit associate to (default 0 [ANY])");
 
+#ifdef CONFIG_IPW2200_PROMISCUOUS
+module_param(rtap_iface, int, 0444);
+MODULE_PARM_DESC(rtap_iface, "create the rtap interface (1 - create, default 0)");
+#endif
+
 #ifdef CONFIG_IPW_QOS
 module_param(qos_enable, int, 0444);
 MODULE_PARM_DESC(qos_enable, "enable all QoS functionalitis");