litmus-rt.git - The LITMUS^RT kernel.

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author	Mauro Carvalho Chehab <mchehab@redhat.com>	2009-06-29 10:35:05 -0400
committer	Mauro Carvalho Chehab <mchehab@redhat.com>	2009-07-05 13:30:05 -0400
commit	02e7804b2135ff941b8846f5820cf48fbfdadd54 (patch)
tree	58d3e596946d4c6b1bae23465f5d9b80e893d300 /drivers/media/video
parent	6934e6fface7b7d5fe7e578c3f43cbe8f23af2d4 (diff)

V4L/DVB (12138): em28xx: add support for Silvercrest Webcam

This webcam uses a em2710 chipset, that identifies itself as em2820, plus a mt9v011 sensor, and a DY-301P lens. It needs a few different initializations than a normal em28xx device. Thanks to Hans de Goede <hdegoede@redhat.com> and Douglas Landgraf <dougsland@redhat.com> for providing the acces for the webcam during this weekend, I could make a patch for it while returning back from FISL/Fudcom LATAM 2009. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Diffstat (limited to 'drivers/media/video')

-rw-r--r--

drivers/media/video/em28xx/Kconfig

-rw-r--r--

drivers/media/video/em28xx/em28xx-cards.c

-rw-r--r--

drivers/media/video/em28xx/em28xx-core.c

-rw-r--r--

drivers/media/video/em28xx/em28xx.h

4 files changed, 68 insertions, 7 deletions


diff --git a/drivers/media/video/em28xx/Kconfig b/drivers/media/video/em28xx/Kconfig index 16a5af30e9d1..6524b493e033 100644 --- a/drivers/media/video/em28xx/Kconfig +++ b/drivers/media/video/em28xx/Kconfig
@@ -8,6 +8,8 @@ config VIDEO_EM28XX
8	select VIDEO_SAA711X if VIDEO_HELPER_CHIPS_AUTO	8	select VIDEO_SAA711X if VIDEO_HELPER_CHIPS_AUTO
9	select VIDEO_TVP5150 if VIDEO_HELPER_CHIPS_AUTO	9	select VIDEO_TVP5150 if VIDEO_HELPER_CHIPS_AUTO
10	select VIDEO_MSP3400 if VIDEO_HELPER_CHIPS_AUTO	10	select VIDEO_MSP3400 if VIDEO_HELPER_CHIPS_AUTO
		11	select VIDEO_MT9V011 if VIDEO_HELPER_CHIPS_AUTO
		12
11	---help---	13	---help---
12	This is a video4linux driver for Empia 28xx based TV cards.	14	This is a video4linux driver for Empia 28xx based TV cards.
13		15


diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c index c43fdb9bc888..bd9b637c7ea5 100644 --- a/drivers/media/video/em28xx/em28xx-cards.c +++ b/drivers/media/video/em28xx/em28xx-cards.c
@@ -191,6 +191,13 @@ static struct em28xx_reg_seq terratec_av350_unmute_gpio[] = {
191	{EM28XX_R08_GPIO, 0xff, 0xff, 10},	191	{EM28XX_R08_GPIO, 0xff, 0xff, 10},
192	{ -1, -1, -1, -1},	192	{ -1, -1, -1, -1},
193	};	193	};
		194
		195	static struct em28xx_reg_seq silvercrest_reg_seq[] = {
		196	{EM28XX_R08_GPIO, 0xff, 0xff, 10},
		197	{EM28XX_R08_GPIO, 0x01, 0xf7, 10},
		198	{ -1, -1, -1, -1},
		199	};
		200
194	/*	201	/*
195	* Board definitions	202	* Board definitions
196	*/	203	*/
@@ -438,6 +445,18 @@ struct em28xx_board em28xx_boards[] = {
438	.amux = EM28XX_AMUX_VIDEO,	445	.amux = EM28XX_AMUX_VIDEO,
439	} },	446	} },
440	},	447	},
		448	[EM2820_BOARD_SILVERCREST_WEBCAM] = {
		449	.name = "Silvercrest Webcam 1.3mpix",
		450	.tuner_type = TUNER_ABSENT,
		451	.is_27xx = 1,
		452	.decoder = EM28XX_MT9V011,
		453	.input = { {
		454	.type = EM28XX_VMUX_COMPOSITE1,
		455	.vmux = 0,
		456	.amux = EM28XX_AMUX_VIDEO,
		457	.gpio = silvercrest_reg_seq,
		458	} },
		459	},
441	[EM2821_BOARD_SUPERCOMP_USB_2] = {	460	[EM2821_BOARD_SUPERCOMP_USB_2] = {
442	.name = "Supercomp USB 2.0 TV",	461	.name = "Supercomp USB 2.0 TV",
443	.valid = EM28XX_BOARD_NOT_VALIDATED,	462	.valid = EM28XX_BOARD_NOT_VALIDATED,
@@ -1639,6 +1658,11 @@ static unsigned short tvp5150_addrs[] = {
1639	I2C_CLIENT_END	1658	I2C_CLIENT_END
1640	};	1659	};
1641		1660
		1661	static unsigned short mt9v011_addrs[] = {
		1662	0xba >> 1,
		1663	I2C_CLIENT_END
		1664	};
		1665
1642	static unsigned short msp3400_addrs[] = {	1666	static unsigned short msp3400_addrs[] = {
1643	0x80 >> 1,	1667	0x80 >> 1,
1644	0x88 >> 1,	1668	0x88 >> 1,
@@ -1706,7 +1730,10 @@ void em28xx_pre_card_setup(struct em28xx *dev)
1706	em28xx_info("chip ID is em2750\n");	1730	em28xx_info("chip ID is em2750\n");
1707	break;	1731	break;
1708	case CHIP_ID_EM2820:	1732	case CHIP_ID_EM2820:
1709	em28xx_info("chip ID is em2820\n");	1733	if (dev->board.is_27xx)
		1734	em28xx_info("chip is em2710\n");
		1735	else
		1736	em28xx_info("chip ID is em2820\n");
1710	break;	1737	break;
1711	case CHIP_ID_EM2840:	1738	case CHIP_ID_EM2840:
1712	em28xx_info("chip ID is em2840\n");	1739	em28xx_info("chip ID is em2840\n");
@@ -2158,6 +2185,10 @@ void em28xx_card_setup(struct em28xx *dev)
2158	before probing the i2c bus. */	2185	before probing the i2c bus. */
2159	em28xx_set_mode(dev, EM28XX_ANALOG_MODE);	2186	em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2160	break;	2187	break;
		2188	case EM2820_BOARD_SILVERCREST_WEBCAM:
		2189	/* FIXME: need to document the registers bellow */
		2190	em28xx_write_reg(dev, 0x0d, 0x42);
		2191	em28xx_write_reg(dev, 0x13, 0x08);
2161	}	2192	}
2162		2193
2163	if (dev->board.has_snapshot_button)	2194	if (dev->board.has_snapshot_button)
@@ -2189,6 +2220,10 @@ void em28xx_card_setup(struct em28xx *dev)
2189	v4l2_i2c_new_probed_subdev(&dev->v4l2_dev, &dev->i2c_adap,	2220	v4l2_i2c_new_probed_subdev(&dev->v4l2_dev, &dev->i2c_adap,
2190	"tvp5150", "tvp5150", tvp5150_addrs);	2221	"tvp5150", "tvp5150", tvp5150_addrs);
2191		2222
		2223	if (dev->board.decoder == EM28XX_MT9V011)
		2224	v4l2_i2c_new_probed_subdev(&dev->v4l2_dev, &dev->i2c_adap,
		2225	"mt9v011", "mt9v011", mt9v011_addrs);
		2226
2192	if (dev->board.adecoder == EM28XX_TVAUDIO)	2227	if (dev->board.adecoder == EM28XX_TVAUDIO)
2193	v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap,	2228	v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap,
2194	"tvaudio", "tvaudio", dev->board.tvaudio_addr);	2229	"tvaudio", "tvaudio", dev->board.tvaudio_addr);


diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c index c8d7ce8fbd36..dda2721ee5b0 100644 --- a/drivers/media/video/em28xx/em28xx-core.c +++ b/drivers/media/video/em28xx/em28xx-core.c
@@ -648,17 +648,29 @@ int em28xx_capture_start(struct em28xx *dev, int start)
648	int em28xx_set_outfmt(struct em28xx *dev)	648	int em28xx_set_outfmt(struct em28xx *dev)
649	{	649	{
650	int ret;	650	int ret;
		651	int vinmode, vinctl, outfmt;
		652
		653	outfmt = dev->format->reg;
		654
		655	if (dev->board.is_27xx) {
		656	vinmode = 0x0d;
		657	vinctl = 0x00;
		658	outfmt = 0x24;
		659	} else {
		660	vinmode = 0x10;
		661	vinctl = 0x11;
		662	}
651		663
652	ret = em28xx_write_reg_bits(dev, EM28XX_R27_OUTFMT,	664	ret = em28xx_write_reg_bits(dev, EM28XX_R27_OUTFMT,
653	dev->format->reg \| 0x20, 0x3f);	665	outfmt \| 0x20, 0xff);
654	if (ret < 0)	666	if (ret < 0)
655	return ret;	667	return ret;
656		668
657	ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, 0x10);	669	ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, vinmode);
658	if (ret < 0)	670	if (ret < 0)
659	return ret;	671	return ret;
660		672
661	return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, 0x11);	673	return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctl);
662	}	674	}
663		675
664	static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,	676	static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,
@@ -695,13 +707,19 @@ static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v)
695	{	707	{
696	u8 mode;	708	u8 mode;
697	/* the em2800 scaler only supports scaling down to 50% */	709	/* the em2800 scaler only supports scaling down to 50% */
698	if (dev->board.is_em2800)	710
		711	if (dev->board.is_27xx) {
		712	/* FIXME: Don't use the scaler yet */
		713	mode = 0;
		714	} else if (dev->board.is_em2800) {
699	mode = (v ? 0x20 : 0x00) \| (h ? 0x10 : 0x00);	715	mode = (v ? 0x20 : 0x00) \| (h ? 0x10 : 0x00);
700	else {	716	} else {
701	u8 buf[2];	717	u8 buf[2];
		718
702	buf[0] = h;	719	buf[0] = h;
703	buf[1] = h >> 8;	720	buf[1] = h >> 8;
704	em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2);	721	em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2);
		722
705	buf[0] = v;	723	buf[0] = v;
706	buf[1] = v >> 8;	724	buf[1] = v >> 8;
707	em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2);	725	em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2);
@@ -720,8 +738,11 @@ int em28xx_resolution_set(struct em28xx *dev)
720	height = norm_maxh(dev) >> 1;	738	height = norm_maxh(dev) >> 1;
721		739
722	em28xx_set_outfmt(dev);	740	em28xx_set_outfmt(dev);
		741
		742
723	em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2);	743	em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2);
724	em28xx_capture_area_set(dev, 0, 0, width >> 2, height >> 2);	744	em28xx_capture_area_set(dev, 0, 0, width >> 2, height >> 2);
		745
725	return em28xx_scaler_set(dev, dev->hscale, dev->vscale);	746	return em28xx_scaler_set(dev, dev->hscale, dev->vscale);
726	}	747	}
727		748


diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h index 813ce45c2f99..d90fef463764 100644 --- a/drivers/media/video/em28xx/em28xx.h +++ b/drivers/media/video/em28xx/em28xx.h
@@ -107,6 +107,7 @@
107	#define EM2860_BOARD_TERRATEC_AV350 68	107	#define EM2860_BOARD_TERRATEC_AV350 68
108	#define EM2882_BOARD_KWORLD_ATSC_315U 69	108	#define EM2882_BOARD_KWORLD_ATSC_315U 69
109	#define EM2882_BOARD_EVGA_INDTUBE 70	109	#define EM2882_BOARD_EVGA_INDTUBE 70
		110	#define EM2820_BOARD_SILVERCREST_WEBCAM 71
110		111
111	/* Limits minimum and default number of buffers */	112	/* Limits minimum and default number of buffers */
112	#define EM28XX_MIN_BUF 4	113	#define EM28XX_MIN_BUF 4
@@ -360,6 +361,7 @@ enum em28xx_decoder {
360	EM28XX_NODECODER,	361	EM28XX_NODECODER,
361	EM28XX_TVP5150,	362	EM28XX_TVP5150,
362	EM28XX_SAA711X,	363	EM28XX_SAA711X,
		364	EM28XX_MT9V011,
363	};	365	};
364		366
365	enum em28xx_adecoder {	367	enum em28xx_adecoder {
@@ -388,6 +390,7 @@ struct em28xx_board {
388	unsigned int max_range_640_480:1;	390	unsigned int max_range_640_480:1;
389	unsigned int has_dvb:1;	391	unsigned int has_dvb:1;
390	unsigned int has_snapshot_button:1;	392	unsigned int has_snapshot_button:1;
		393	unsigned int is_27xx:1;
391	unsigned int valid:1;	394	unsigned int valid:1;
392		395
393	unsigned char xclk, i2c_speed;	396	unsigned char xclk, i2c_speed;

/* * Copyright 2002-2005, Instant802 Networks, Inc. * Copyright 2005-2006, Devicescape Software, Inc. * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/skbuff.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/rcupdate.h> #include <net/mac80211.h> #include <net/ieee80211_radiotap.h> #include "ieee80211_i.h" #include "led.h" #include "mesh.h" #include "wep.h" #include "wpa.h" #include "tkip.h" #include "wme.h" static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw, struct tid_ampdu_rx *tid_agg_rx, struct sk_buff *skb, u16 mpdu_seq_num, int bar_req); /* * monitor mode reception * * This function cleans up the SKB, i.e. it removes all the stuff * only useful for monitoring. */ static struct sk_buff *remove_monitor_info(struct ieee80211_local *local, struct sk_buff *skb, int rtap_len) { skb_pull(skb, rtap_len); if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) { if (likely(skb->len > FCS_LEN)) skb_trim(skb, skb->len - FCS_LEN); else { /* driver bug */ WARN_ON(1); dev_kfree_skb(skb); skb = NULL; } } return skb; } static inline int should_drop_frame(struct ieee80211_rx_status *status, struct sk_buff *skb, int present_fcs_len, int radiotap_len) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) return 1; if (unlikely(skb->len < 16 + present_fcs_len + radiotap_len)) return 1; if (ieee80211_is_ctl(hdr->frame_control) && !ieee80211_is_pspoll(hdr->frame_control) && !ieee80211_is_back_req(hdr->frame_control)) return 1; return 0; } static int ieee80211_rx_radiotap_len(struct ieee80211_local *local, struct ieee80211_rx_status *status) { int len; /* always present fields */ len = sizeof(struct ieee80211_radiotap_header) + 9; if (status->flag & RX_FLAG_TSFT) len += 8; if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) len += 1; if (local->hw.flags & IEEE80211_HW_NOISE_DBM) len += 1; if (len & 1) /* padding for RX_FLAGS if necessary */ len++; /* make sure radiotap starts at a naturally aligned address */ if (len % 8) len = roundup(len, 8); return len; } /* * ieee80211_add_rx_radiotap_header - add radiotap header * * add a radiotap header containing all the fields which the hardware provided. */ static void ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, struct sk_buff *skb, struct ieee80211_rx_status *status, struct ieee80211_rate *rate, int rtap_len) { struct ieee80211_radiotap_header *rthdr; unsigned char *pos; rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); memset(rthdr, 0, rtap_len); /* radiotap header, set always present flags */ rthdr->it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | (1 << IEEE80211_RADIOTAP_CHANNEL) | (1 << IEEE80211_RADIOTAP_ANTENNA) | (1 << IEEE80211_RADIOTAP_RX_FLAGS)); rthdr->it_len = cpu_to_le16(rtap_len); pos = (unsigned char *)(rthdr+1); /* the order of the following fields is important */ /* IEEE80211_RADIOTAP_TSFT */ if (status->flag & RX_FLAG_TSFT) { *(__le64 *)pos = cpu_to_le64(status->mactime); rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); pos += 8; } /* IEEE80211_RADIOTAP_FLAGS */ if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) *pos |= IEEE80211_RADIOTAP_F_FCS; if (status->flag & RX_FLAG_SHORTPRE) *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; pos++; /* IEEE80211_RADIOTAP_RATE */ if (status->flag & RX_FLAG_HT) { /* * TODO: add following information into radiotap header once * suitable fields are defined for it: * - MCS index (status->rate_idx) * - HT40 (status->flag & RX_FLAG_40MHZ) * - short-GI (status->flag & RX_FLAG_SHORT_GI) */ *pos = 0; } else { rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); *pos = rate->bitrate / 5; } pos++; /* IEEE80211_RADIOTAP_CHANNEL */ *(__le16 *)pos = cpu_to_le16(status->freq); pos += 2; if (status->band == IEEE80211_BAND_5GHZ) *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ); else if (rate->flags & IEEE80211_RATE_ERP_G) *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ); else *(__le16 *)pos = cpu_to_le16(IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ); pos += 2; /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) { *pos = status->signal; rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); pos++; } /* IEEE80211_RADIOTAP_DBM_ANTNOISE */ if (local->hw.flags & IEEE80211_HW_NOISE_DBM) { *pos = status->noise; rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTNOISE); pos++; } /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ /* IEEE80211_RADIOTAP_ANTENNA */ *pos = status->antenna; pos++; /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ /* IEEE80211_RADIOTAP_RX_FLAGS */ /* ensure 2 byte alignment for the 2 byte field as required */ if ((pos - (unsigned char *)rthdr) & 1) pos++; /* FIXME: when radiotap gets a 'bad PLCP' flag use it here */ if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) *(__le16 *)pos |= cpu_to_le16(IEEE80211_RADIOTAP_F_RX_BADFCS); pos += 2; } /* * This function copies a received frame to all monitor interfaces and * returns a cleaned-up SKB that no longer includes the FCS nor the * radiotap header the driver might have added. */ static struct sk_buff * ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, struct ieee80211_rx_status *status, struct ieee80211_rate *rate) { struct ieee80211_sub_if_data *sdata; int needed_headroom = 0; struct sk_buff *skb, *skb2; struct net_device *prev_dev = NULL; int present_fcs_len = 0; int rtap_len = 0; /* * First, we may need to make a copy of the skb because * (1) we need to modify it for radiotap (if not present), and * (2) the other RX handlers will modify the skb we got. * * We don't need to, of course, if we aren't going to return * the SKB because it has a bad FCS/PLCP checksum. */ if (status->flag & RX_FLAG_RADIOTAP) rtap_len = ieee80211_get_radiotap_len(origskb->data); else /* room for the radiotap header based on driver features */ needed_headroom = ieee80211_rx_radiotap_len(local, status); if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) present_fcs_len = FCS_LEN; if (!local->monitors) { if (should_drop_frame(status, origskb, present_fcs_len, rtap_len)) { dev_kfree_skb(origskb); return NULL; } return remove_monitor_info(local, origskb, rtap_len); } if (should_drop_frame(status, origskb, present_fcs_len, rtap_len)) { /* only need to expand headroom if necessary */ skb = origskb; origskb = NULL; /* * This shouldn't trigger often because most devices have an * RX header they pull before we get here, and that should * be big enough for our radiotap information. We should * probably export the length to drivers so that we can have * them allocate enough headroom to start with. */ if (skb_headroom(skb) < needed_headroom && pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { dev_kfree_skb(skb); return NULL; } } else { /* * Need to make a copy and possibly remove radiotap header * and FCS from the original. */ skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); origskb = remove_monitor_info(local, origskb, rtap_len); if (!skb) return origskb; } /* if necessary, prepend radiotap information */ if (!(status->flag & RX_FLAG_RADIOTAP)) ieee80211_add_rx_radiotap_header(local, skb, status, rate, needed_headroom); skb_reset_mac_header(skb); skb->ip_summed = CHECKSUM_UNNECESSARY; skb->pkt_type = PACKET_OTHERHOST; skb->protocol = htons(ETH_P_802_2); list_for_each_entry_rcu(sdata, &local->interfaces, list) { if (!netif_running(sdata->dev)) continue; if (sdata->vif.type != NL80211_IFTYPE_MONITOR) continue; if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) continue; if (prev_dev) { skb2 = skb_clone(skb, GFP_ATOMIC); if (skb2) { skb2->dev = prev_dev; netif_rx(skb2); } } prev_dev = sdata->dev; sdata->dev->stats.rx_packets++; sdata->dev->stats.rx_bytes += skb->len; } if (prev_dev) { skb->dev = prev_dev; netif_rx(skb); } else dev_kfree_skb(skb); return origskb; } static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; int tid; /* does the frame have a qos control field? */ if (ieee80211_is_data_qos(hdr->frame_control)) { u8 *qc = ieee80211_get_qos_ctl(hdr); /* frame has qos control */ tid = *qc & IEEE80211_QOS_CTL_TID_MASK; if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT) rx->flags |= IEEE80211_RX_AMSDU; else rx->flags &= ~IEEE80211_RX_AMSDU; } else { /* * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): * * Sequence numbers for management frames, QoS data * frames with a broadcast/multicast address in the * Address 1 field, and all non-QoS data frames sent * by QoS STAs are assigned using an additional single * modulo-4096 counter, [...] * * We also use that counter for non-QoS STAs. */ tid = NUM_RX_DATA_QUEUES - 1; } rx->queue = tid; /* Set skb->priority to 1d tag if highest order bit of TID is not set. * For now, set skb->priority to 0 for other cases. */ rx->skb->priority = (tid > 7) ? 0 : tid; } /** * DOC: Packet alignment * * Drivers always need to pass packets that are aligned to two-byte boundaries * to the stack. * * Additionally, should, if possible, align the payload data in a way that * guarantees that the contained IP header is aligned to a four-byte * boundary. In the case of regular frames, this simply means aligning the * payload to a four-byte boundary (because either the IP header is directly * contained, or IV/RFC1042 headers that have a length divisible by four are * in front of it). * * With A-MSDU frames, however, the payload data address must yield two modulo * four because there are 14-byte 802.3 headers within the A-MSDU frames that * push the IP header further back to a multiple of four again. Thankfully, the * specs were sane enough this time around to require padding each A-MSDU * subframe to a length that is a multiple of four. * * Padding like Atheros hardware adds which is inbetween the 802.11 header and * the payload is not supported, the driver is required to move the 802.11 * header to be directly in front of the payload in that case. */ static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; int hdrlen; #ifndef CONFIG_MAC80211_DEBUG_PACKET_ALIGNMENT return; #endif if (WARN_ONCE((unsigned long)rx->skb->data & 1, "unaligned packet at 0x%p\n", rx->skb->data)) return; if (!ieee80211_is_data_present(hdr->frame_control)) return; hdrlen = ieee80211_hdrlen(hdr->frame_control); if (rx->flags & IEEE80211_RX_AMSDU) hdrlen += ETH_HLEN; WARN_ONCE(((unsigned long)(rx->skb->data + hdrlen)) & 3, "unaligned IP payload at 0x%p\n", rx->skb->data + hdrlen); } /* rx handlers */ static ieee80211_rx_result debug_noinline ieee80211_rx_h_passive_scan(struct ieee80211_rx_data *rx) { struct ieee80211_local *local = rx->local; struct sk_buff *skb = rx->skb; if (unlikely(local->hw_scanning)) return ieee80211_scan_rx(rx->sdata, skb, rx->status); if (unlikely(local->sw_scanning)) { /* drop all the other packets during a software scan anyway */ if (ieee80211_scan_rx(rx->sdata, skb, rx->status) != RX_QUEUED) dev_kfree_skb(skb); return RX_QUEUED; } if (unlikely(rx->flags & IEEE80211_RX_IN_SCAN)) { /* scanning finished during invoking of handlers */ I802_DEBUG_INC(local->rx_handlers_drop_passive_scan); return RX_DROP_UNUSABLE; } return RX_CONTINUE; } static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; if (skb->len < 24 || is_multicast_ether_addr(hdr->addr1)) return 0; return ieee80211_is_robust_mgmt_frame(hdr); } static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; if (skb->len < 24 || !is_multicast_ether_addr(hdr->addr1)) return 0; return ieee80211_is_robust_mgmt_frame(hdr); } /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) { struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; struct ieee80211_mmie *mmie; if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) return -1; if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) hdr)) return -1; /* not a robust management frame */ mmie = (struct ieee80211_mmie *) (skb->data + skb->len - sizeof(*mmie)); if (mmie->element_id != WLAN_EID_MMIE || mmie->length != sizeof(*mmie) - 2) return -1; return le16_to_cpu(mmie->key_id); } static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); if (ieee80211_is_data(hdr->frame_control)) { if (!ieee80211_has_a4(hdr->frame_control)) return RX_DROP_MONITOR; if (memcmp(hdr->addr4, rx->dev->dev_addr, ETH_ALEN) == 0) return RX_DROP_MONITOR; } /* If there is not an established peer link and this is not a peer link * establisment frame, beacon or probe, drop the frame. */ if (!rx->sta || sta_plink_state(rx->sta) != PLINK_ESTAB) { struct ieee80211_mgmt *mgmt; if (!ieee80211_is_mgmt(hdr->frame_control)) return RX_DROP_MONITOR; if (ieee80211_is_action(hdr->frame_control)) { mgmt = (struct ieee80211_mgmt *)hdr; if (mgmt->u.action.category != PLINK_CATEGORY) return RX_DROP_MONITOR; return RX_CONTINUE; } if (ieee80211_is_probe_req(hdr->frame_control) || ieee80211_is_probe_resp(hdr->frame_control) || ieee80211_is_beacon(hdr->frame_control)) return RX_CONTINUE; return RX_DROP_MONITOR; } #define msh_h_get(h, l) ((struct ieee80211s_hdr *) ((u8 *)h + l)) if (ieee80211_is_data(hdr->frame_control) && is_multicast_ether_addr(hdr->addr1) && mesh_rmc_check(hdr->addr4, msh_h_get(hdr, hdrlen), rx->sdata)) return RX_DROP_MONITOR; #undef msh_h_get return RX_CONTINUE; } static ieee80211_rx_result debug_noinline ieee80211_rx_h_check(struct ieee80211_rx_data *rx) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */ if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) { if (unlikely(ieee80211_has_retry(hdr->frame_control) && rx->sta->last_seq_ctrl[rx->queue] == hdr->seq_ctrl)) { if (rx->flags & IEEE80211_RX_RA_MATCH) { rx->local->dot11FrameDuplicateCount++; rx->sta->num_duplicates++; } return RX_DROP_MONITOR; } else rx->sta->last_seq_ctrl[rx->queue] = hdr->seq_ctrl; } if (unlikely(rx->skb->len < 16)) { I802_DEBUG_INC(rx->local->rx_handlers_drop_short); return RX_DROP_MONITOR; } /* Drop disallowed frame classes based on STA auth/assoc state; * IEEE 802.11, Chap 5.5. * * mac80211 filters only based on association state, i.e. it drops * Class 3 frames from not associated stations. hostapd sends * deauth/disassoc frames when needed. In addition, hostapd is * responsible for filtering on both auth and assoc states. */ if (ieee80211_vif_is_mesh(&rx->sdata->vif)) return ieee80211_rx_mesh_check(rx); if (unlikely((ieee80211_is_data(hdr->frame_control) || ieee80211_is_pspoll(hdr->frame_control)) && rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && (!rx->sta || !test_sta_flags(rx->sta, WLAN_STA_ASSOC)))) { if ((!ieee80211_has_fromds(hdr->frame_control) && !ieee80211_has_tods(hdr->frame_control) && ieee80211_is_data(hdr->frame_control)) || !(rx->flags & IEEE80211_RX_RA_MATCH)) { /* Drop IBSS frames and frames for other hosts * silently. */ return RX_DROP_MONITOR; } return RX_DROP_MONITOR; } return RX_CONTINUE; } static ieee80211_rx_result debug_noinline ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; int keyidx; int hdrlen; ieee80211_rx_result result = RX_DROP_UNUSABLE; struct ieee80211_key *stakey = NULL; int mmie_keyidx = -1; /* * Key selection 101 * * There are four types of keys: * - GTK (group keys) * - IGTK (group keys for management frames) * - PTK (pairwise keys) * - STK (station-to-station pairwise keys) * * When selecting a key, we have to distinguish between multicast * (including broadcast) and unicast frames, the latter can only * use PTKs and STKs while the former always use GTKs and IGTKs. * Unless, of course, actual WEP keys ("pre-RSNA") are used, then * unicast frames can also use key indices like GTKs. Hence, if we * don't have a PTK/STK we check the key index for a WEP key. * * Note that in a regular BSS, multicast frames are sent by the * AP only, associated stations unicast the frame to the AP first * which then multicasts it on their behalf. * * There is also a slight problem in IBSS mode: GTKs are negotiated * with each station, that is something we don't currently handle. * The spec seems to expect that one negotiates the same key with * every station but there's no such requirement; VLANs could be * possible. */ if (!ieee80211_has_protected(hdr->frame_control)) { if (!ieee80211_is_mgmt(hdr->frame_control) || rx->sta == NULL || !test_sta_flags(rx->sta, WLAN_STA_MFP)) return RX_CONTINUE; mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); if (mmie_keyidx < 0) return RX_CONTINUE; } /* * No point in finding a key and decrypting if the frame is neither * addressed to us nor a multicast frame. */ if (!(rx->flags & IEEE80211_RX_RA_MATCH)) return RX_CONTINUE; if (rx->sta) stakey = rcu_dereference(rx->sta->key); if (!is_multicast_ether_addr(hdr->addr1) && stakey) { rx->key = stakey; } else if (mmie_keyidx >= 0) { /* Broadcast/multicast robust management frame / BIP */ if ((rx->status->flag & RX_FLAG_DECRYPTED) && (rx->status->flag & RX_FLAG_IV_STRIPPED)) return RX_CONTINUE; if (mmie_keyidx < NUM_DEFAULT_KEYS || mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) return RX_DROP_MONITOR; /* unexpected BIP keyidx */ rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); } else { /* * The device doesn't give us the IV so we won't be * able to look up the key. That's ok though, we * don't need to decrypt the frame, we just won't * be able to keep statistics accurate. * Except for key threshold notifications, should * we somehow allow the driver to tell us which key * the hardware used if this flag is set? */ if ((rx->status->flag & RX_FLAG_DECRYPTED) && (rx->status->flag & RX_FLAG_IV_STRIPPED)) return RX_CONTINUE; hdrlen = ieee80211_hdrlen(hdr->frame_control); if (rx->skb->len < 8 + hdrlen) return RX_DROP_UNUSABLE; /* TODO: count this? */ /* * no need to call ieee80211_wep_get_keyidx, * it verifies a bunch of things we've done already */ keyidx = rx->skb->data[hdrlen + 3] >> 6; rx->key = rcu_dereference(rx->sdata->keys[keyidx]); /* * RSNA-protected unicast frames should always be sent with * pairwise or station-to-station keys, but for WEP we allow * using a key index as well. */ if (rx->key && rx->key->conf.alg != ALG_WEP && !is_multicast_ether_addr(hdr->addr1)) rx->key = NULL; } if (rx->key) { rx->key->tx_rx_count++; /* TODO: add threshold stuff again */ } else { return RX_DROP_MONITOR; } /* Check for weak IVs if possible */ if (rx->sta && rx->key->conf.alg == ALG_WEP && ieee80211_is_data(hdr->frame_control) && (!(rx->status->flag & RX_FLAG_IV_STRIPPED) || !(rx->status->flag & RX_FLAG_DECRYPTED)) && ieee80211_wep_is_weak_iv(rx->skb, rx->key)) rx->sta->wep_weak_iv_count++; switch (rx->key->conf.alg) { case ALG_WEP: result = ieee80211_crypto_wep_decrypt(rx); break; case ALG_TKIP: result = ieee80211_crypto_tkip_decrypt(rx); break; case ALG_CCMP: result = ieee80211_crypto_ccmp_decrypt(rx); break; case ALG_AES_CMAC: result = ieee80211_crypto_aes_cmac_decrypt(rx); break; } /* either the frame has been decrypted or will be dropped */ rx->status->flag |= RX_FLAG_DECRYPTED; return result; } static ieee80211_rx_result debug_noinline ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) { struct ieee80211_local *local; struct ieee80211_hdr *hdr; struct sk_buff *skb; local = rx->local; skb = rx->skb; hdr = (struct ieee80211_hdr *) skb->data; if (!local->pspolling) return RX_CONTINUE; if (!ieee80211_has_fromds(hdr->frame_control)) /* this is not from AP */ return RX_CONTINUE; if (!ieee80211_is_data(hdr->frame_control)) return RX_CONTINUE; if (!ieee80211_has_moredata(hdr->frame_control)) { /* AP has no more frames buffered for us */ local->pspolling = false; return RX_CONTINUE; } /* more data bit is set, let's request a new frame from the AP */ ieee80211_send_pspoll(local, rx->sdata); return RX_CONTINUE; } static void ap_sta_ps_start(struct sta_info *sta) { struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; atomic_inc(&sdata->bss->num_sta_ps); set_and_clear_sta_flags(sta, WLAN_STA_PS, WLAN_STA_PSPOLL); if (local->ops->sta_notify) local->ops->sta_notify(local_to_hw(local), &sdata->vif, STA_NOTIFY_SLEEP, &sta->sta); #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG printk(KERN_DEBUG "%s: STA %pM aid %d enters power save mode\n", sdata->dev->name, sta->sta.addr, sta->sta.aid); #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ } static int ap_sta_ps_end(struct sta_info *sta) { struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; struct sk_buff *skb; int sent = 0; atomic_dec(&sdata->bss->num_sta_ps); clear_sta_flags(sta, WLAN_STA_PS | WLAN_STA_PSPOLL); if (local->ops->sta_notify) local->ops->sta_notify(local_to_hw(local), &sdata->vif, STA_NOTIFY_AWAKE, &sta->sta); if (!skb_queue_empty(&sta->ps_tx_buf)) sta_info_clear_tim_bit(sta); #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG printk(KERN_DEBUG "%s: STA %pM aid %d exits power save mode\n", sdata->dev->name, sta->sta.addr, sta->sta.aid); #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ /* Send all buffered frames to the station */ while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { sent++; skb->requeue = 1; dev_queue_xmit(skb); } while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { local->total_ps_buffered--; sent++; #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG printk(KERN_DEBUG "%s: STA %pM aid %d send PS frame " "since STA not sleeping anymore\n", sdata->dev->name, sta->sta.addr, sta->sta.aid); #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ skb->requeue = 1; dev_queue_xmit(skb); } return sent; } static ieee80211_rx_result debug_noinline ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) { struct sta_info *sta = rx->sta; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; if (!sta) return RX_CONTINUE; /* Update last_rx only for IBSS packets which are for the current * BSSID to avoid keeping the current IBSS network alive in cases where * other STAs are using different BSSID. */ if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, NL80211_IFTYPE_ADHOC); if (compare_ether_addr(bssid, rx->sdata->u.ibss.bssid) == 0) sta->last_rx = jiffies; } else if (!is_multicast_ether_addr(hdr->addr1) || rx->sdata->vif.type == NL80211_IFTYPE_STATION) { /* Update last_rx only for unicast frames in order to prevent * the Probe Request frames (the only broadcast frames from a * STA in infrastructure mode) from keeping a connection alive. * Mesh beacons will update last_rx when if they are found to * match the current local configuration when processed. */ sta->last_rx = jiffies; } if (!(rx->flags & IEEE80211_RX_RA_MATCH)) return RX_CONTINUE; sta->rx_fragments++; sta->rx_bytes += rx->skb->len; sta->last_signal = rx->status->signal; sta->last_qual = rx->status->qual; sta->last_noise = rx->status->noise; /* * Change STA power saving mode only at the end of a frame * exchange sequence. */ if (!ieee80211_has_morefrags(hdr->frame_control) && (rx->sdata->vif.type == NL80211_IFTYPE_AP || rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) { if (test_sta_flags(sta, WLAN_STA_PS)) { /* * Ignore doze->wake transitions that are * indicated by non-data frames, the standard * is unclear here, but for example going to * PS mode and then scanning would cause a * doze->wake transition for the probe request, * and that is clearly undesirable. */ if (ieee80211_is_data(hdr->frame_control) && !ieee80211_has_pm(hdr->frame_control)) rx->sent_ps_buffered += ap_sta_ps_end(sta); } else { if (ieee80211_has_pm(hdr->frame_control)) ap_sta_ps_start(sta); } } /* Drop data::nullfunc frames silently, since they are used only to * control station power saving mode. */ if (ieee80211_is_nullfunc(hdr->frame_control)) { I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); /* Update counter and free packet here to avoid counting this * as a dropped packed. */ sta->rx_packets++; dev_kfree_skb(rx->skb); return RX_QUEUED; } return RX_CONTINUE; } /* ieee80211_rx_h_sta_process */ static inline struct ieee80211_fragment_entry * ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, unsigned int frag, unsigned int seq, int rx_queue, struct sk_buff **skb) { struct ieee80211_fragment_entry *entry; int idx; idx = sdata->fragment_next; entry = &sdata->fragments[sdata->fragment_next++]; if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) sdata->fragment_next = 0; if (!skb_queue_empty(&entry->skb_list)) { #ifdef CONFIG_MAC80211_VERBOSE_DEBUG struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) entry->skb_list.next->data; printk(KERN_DEBUG "%s: RX reassembly removed oldest " "fragment entry (idx=%d age=%lu seq=%d last_frag=%d " "addr1=%pM addr2=%pM\n", sdata->dev->name, idx, jiffies - entry->first_frag_time, entry->seq, entry->last_frag, hdr->addr1, hdr->addr2); #endif __skb_queue_purge(&entry->skb_list); } __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ *skb = NULL; entry->first_frag_time = jiffies; entry->seq = seq; entry->rx_queue = rx_queue; entry->last_frag = frag; entry->ccmp = 0; entry->extra_len = 0; return entry; } static inline struct ieee80211_fragment_entry * ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, unsigned int frag, unsigned int seq, int rx_queue, struct ieee80211_hdr *hdr) { struct ieee80211_fragment_entry *entry; int i, idx; idx = sdata->fragment_next; for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { struct ieee80211_hdr *f_hdr; idx--; if (idx < 0) idx = IEEE80211_FRAGMENT_MAX - 1; entry = &sdata->fragments[idx]; if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || entry->rx_queue != rx_queue || entry->last_frag + 1 != frag) continue; f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; /* * Check ftype and addresses are equal, else check next fragment */ if (((hdr->frame_control ^ f_hdr->frame_control) & cpu_to_le16(IEEE80211_FCTL_FTYPE)) || compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 || compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0) continue; if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { __skb_queue_purge(&entry->skb_list); continue; } return entry; } return NULL; } static ieee80211_rx_result debug_noinline ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) { struct ieee80211_hdr *hdr; u16 sc; __le16 fc; unsigned int frag, seq; struct ieee80211_fragment_entry *entry; struct sk_buff *skb; hdr = (struct ieee80211_hdr *)rx->skb->data; fc = hdr->frame_control; sc = le16_to_cpu(hdr->seq_ctrl); frag = sc & IEEE80211_SCTL_FRAG; if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || (rx->skb)->len < 24 || is_multicast_ether_addr(hdr->addr1))) { /* not fragmented */ goto out; } I802_DEBUG_INC(rx->local->rx_handlers_fragments); seq = (sc & IEEE80211_SCTL_SEQ) >> 4; if (frag == 0) { /* This is the first fragment of a new frame. */ entry = ieee80211_reassemble_add(rx->sdata, frag, seq, rx->queue, &(rx->skb)); if (rx->key && rx->key->conf.alg == ALG_CCMP && ieee80211_has_protected(fc)) { /* Store CCMP PN so that we can verify that the next * fragment has a sequential PN value. */ entry->ccmp = 1; memcpy(entry->last_pn, rx->key->u.ccmp.rx_pn[rx->queue], CCMP_PN_LEN); } return RX_QUEUED; } /* This is a fragment for a frame that should already be pending in * fragment cache. Add this fragment to the end of the pending entry. */ entry = ieee80211_reassemble_find(rx->sdata, frag, seq, rx->queue, hdr); if (!entry) { I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); return RX_DROP_MONITOR; } /* Verify that MPDUs within one MSDU have sequential PN values. * (IEEE 802.11i, 8.3.3.4.5) */ if (entry->ccmp) { int i; u8 pn[CCMP_PN_LEN], *rpn; if (!rx->key || rx->key->conf.alg != ALG_CCMP) return RX_DROP_UNUSABLE; memcpy(pn, entry->last_pn, CCMP_PN_LEN); for (i = CCMP_PN_LEN - 1; i >= 0; i--) { pn[i]++; if (pn[i]) break; } rpn = rx->key->u.ccmp.rx_pn[rx->queue]; if (memcmp(pn, rpn, CCMP_PN_LEN)) return RX_DROP_UNUSABLE; memcpy(entry->last_pn, pn, CCMP_PN_LEN); } skb_pull(rx->skb, ieee80211_hdrlen(fc)); __skb_queue_tail(&entry->skb_list, rx->skb); entry->last_frag = frag; entry->extra_len += rx->skb->len; if (ieee80211_has_morefrags(fc)) { rx->skb = NULL; return RX_QUEUED; } rx->skb = __skb_dequeue(&entry->skb_list); if (skb_tailroom(rx->skb) < entry->extra_len) { I802_DEBUG_INC(rx->local->rx_expand_skb_head2); if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, GFP_ATOMIC))) { I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); __skb_queue_purge(&entry->skb_list); return RX_DROP_UNUSABLE; } } while ((skb = __skb_dequeue(&entry->skb_list))) { memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); dev_kfree_skb(skb); } /* Complete frame has been reassembled - process it now */ rx->flags |= IEEE80211_RX_FRAGMENTED; out: if (rx->sta) rx->sta->rx_packets++; if (is_multicast_ether_addr(hdr->addr1)) rx->local->dot11MulticastReceivedFrameCount++; else ieee80211_led_rx(rx->local); return RX_CONTINUE; } static ieee80211_rx_result debug_noinline ieee80211_rx_h_ps_poll(struct ieee80211_rx_data *rx) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); struct sk_buff *skb; int no_pending_pkts; __le16 fc = ((struct ieee80211_hdr *)rx->skb->data)->frame_control; if (likely(!rx->sta || !ieee80211_is_pspoll(fc) || !(rx->flags & IEEE80211_RX_RA_MATCH))) return RX_CONTINUE; if ((sdata->vif.type != NL80211_IFTYPE_AP) && (sdata->vif.type != NL80211_IFTYPE_AP_VLAN)) return RX_DROP_UNUSABLE; skb = skb_dequeue(&rx->sta->tx_filtered); if (!skb) { skb = skb_dequeue(&rx->sta->ps_tx_buf); if (skb) rx->local->total_ps_buffered--; } no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) && skb_queue_empty(&rx->sta->ps_tx_buf); if (skb) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; /* * Tell TX path to send one frame even though the STA may * still remain is PS mode after this frame exchange. */ set_sta_flags(rx->sta, WLAN_STA_PSPOLL); #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG printk(KERN_DEBUG "STA %pM aid %d: PS Poll (entries after %d)\n", rx->sta->sta.addr, rx->sta->sta.aid, skb_queue_len(&rx->sta->ps_tx_buf)); #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ /* Use MoreData flag to indicate whether there are more * buffered frames for this STA */ if (no_pending_pkts) hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA); else hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); dev_queue_xmit(skb); if (no_pending_pkts) sta_info_clear_tim_bit(rx->sta); #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG } else if (!rx->sent_ps_buffered) { /* * FIXME: This can be the result of a race condition between * us expiring a frame and the station polling for it. * Should we send it a null-func frame indicating we * have nothing buffered for it? */ printk(KERN_DEBUG "%s: STA %pM sent PS Poll even " "though there are no buffered frames for it\n", rx->dev->name, rx->sta->sta.addr); #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ } /* Free PS Poll skb here instead of returning RX_DROP that would * count as an dropped frame. */ dev_kfree_skb(rx->skb); return RX_QUEUED; } static ieee80211_rx_result debug_noinline ieee80211_rx_h_remove_qos_control(struct ieee80211_rx_data *rx) { u8 *data = rx->skb->data; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)data; if (!ieee80211_is_data_qos(hdr->frame_control)) return RX_CONTINUE; /* remove the qos control field, update frame type and meta-data */ memmove(data + IEEE80211_QOS_CTL_LEN, data, ieee80211_hdrlen(hdr->frame_control) - IEEE80211_QOS_CTL_LEN); hdr = (struct ieee80211_hdr *)skb_pull(rx->skb, IEEE80211_QOS_CTL_LEN); /* change frame type to non QOS */ hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA); return RX_CONTINUE; } static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) { if (unlikely(!rx->sta || !test_sta_flags(rx->sta, WLAN_STA_AUTHORIZED))) return -EACCES; return 0; } static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) { /* * Pass through unencrypted frames if the hardware has * decrypted them already. */ if (rx->status->flag & RX_FLAG_DECRYPTED) return 0; /* Drop unencrypted frames if key is set. */ if (unlikely(!ieee80211_has_protected(fc) && !ieee80211_is_nullfunc(fc) && (!ieee80211_is_mgmt(fc) || (ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && rx->sta && test_sta_flags(rx->sta, WLAN_STA_MFP))) && (rx->key || rx->sdata->drop_unencrypted))) return -EACCES; /* BIP does not use Protected field, so need to check MMIE */ if (unlikely(rx->sta && test_sta_flags(rx->sta, WLAN_STA_MFP) && ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && ieee80211_get_mmie_keyidx(rx->skb) < 0 && (rx->key || rx->sdata->drop_unencrypted))) return -EACCES; return 0; } static int ieee80211_data_to_8023(struct ieee80211_rx_data *rx) { struct net_device *dev = rx->dev; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; u16 hdrlen, ethertype; u8 *payload; u8 dst[ETH_ALEN]; u8 src[ETH_ALEN] __aligned(2); struct sk_buff *skb = rx->skb; struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) return -1; hdrlen = ieee80211_hdrlen(hdr->frame_control); /* convert IEEE 802.11 header + possible LLC headers into Ethernet * header * IEEE 802.11 address fields: * ToDS FromDS Addr1 Addr2 Addr3 Addr4 * 0 0 DA SA BSSID n/a * 0 1 DA BSSID SA n/a * 1 0 BSSID SA DA n/a * 1 1 RA TA DA SA */ memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN); memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN); switch (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { case cpu_to_le16(IEEE80211_FCTL_TODS): if (unlikely(sdata->vif.type != NL80211_IFTYPE_AP && sdata->vif.type != NL80211_IFTYPE_AP_VLAN)) return -1; break; case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): if (unlikely(sdata->vif.type != NL80211_IFTYPE_WDS && sdata->vif.type != NL80211_IFTYPE_MESH_POINT)) return -1; if (ieee80211_vif_is_mesh(&sdata->vif)) { struct ieee80211s_hdr *meshdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); hdrlen += ieee80211_get_mesh_hdrlen(meshdr); if (meshdr->flags & MESH_FLAGS_AE_A5_A6) { memcpy(dst, meshdr->eaddr1, ETH_ALEN); memcpy(src, meshdr->eaddr2, ETH_ALEN); } } break; case cpu_to_le16(IEEE80211_FCTL_FROMDS): if (sdata->vif.type != NL80211_IFTYPE_STATION || (is_multicast_ether_addr(dst) && !compare_ether_addr(src, dev->dev_addr))) return -1; break; case cpu_to_le16(0): if (sdata->vif.type != NL80211_IFTYPE_ADHOC) return -1; break; } if (unlikely(skb->len - hdrlen < 8)) return -1; payload = skb->data + hdrlen; ethertype = (payload[6] << 8) | payload[7]; if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || compare_ether_addr(payload, bridge_tunnel_header) == 0)) { /* remove RFC1042 or Bridge-Tunnel encapsulation and * replace EtherType */ skb_pull(skb, hdrlen + 6); memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); } else { struct ethhdr *ehdr; __be16 len; skb_pull(skb, hdrlen); len = htons(skb->len); ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); memcpy(ehdr->h_dest, dst, ETH_ALEN); memcpy(ehdr->h_source, src, ETH_ALEN); ehdr->h_proto = len; } return 0; } /* * requires that rx->skb is a frame with ethernet header */ static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) { static const u8 pae_group_addr[ETH_ALEN] __aligned(2) = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; /* * Allow EAPOL frames to us/the PAE group address regardless * of whether the frame was encrypted or not. */ if (ehdr->h_proto == htons(ETH_P_PAE) && (compare_ether_addr(ehdr->h_dest, rx->dev->dev_addr) == 0 || compare_ether_addr(ehdr->h_dest, pae_group_addr) == 0)) return true; if (ieee80211_802_1x_port_control(rx) || ieee80211_drop_unencrypted(rx, fc)) return false; return true; } /* * requires that rx->skb is a frame with ethernet header */ static void ieee80211_deliver_skb(struct ieee80211_rx_data *rx) { struct net_device *dev = rx->dev; struct ieee80211_local *local = rx->local; struct sk_buff *skb, *xmit_skb; struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; struct sta_info *dsta; skb = rx->skb; xmit_skb = NULL; if ((sdata->vif.type == NL80211_IFTYPE_AP || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && (rx->flags & IEEE80211_RX_RA_MATCH)) { if (is_multicast_ether_addr(ehdr->h_dest)) { /* * send multicast frames both to higher layers in * local net stack and back to the wireless medium */ xmit_skb = skb_copy(skb, GFP_ATOMIC); if (!xmit_skb && net_ratelimit()) printk(KERN_DEBUG "%s: failed to clone " "multicast frame\n", dev->name); } else { dsta = sta_info_get(local, skb->data); if (dsta && dsta->sdata->dev == dev) { /* * The destination station is associated to * this AP (in this VLAN), so send the frame * directly to it and do not pass it to local * net stack. */ xmit_skb = skb; skb = NULL; } } } if (skb) { int align __maybe_unused; #if defined(CONFIG_MAC80211_DEBUG_PACKET_ALIGNMENT) || !defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) /* * 'align' will only take the values 0 or 2 here * since all frames are required to be aligned * to 2-byte boundaries when being passed to * mac80211. That also explains the __skb_push() * below. */ align = (unsigned long)skb->data & 4; if (align) { if (WARN_ON(skb_headroom(skb) < 3)) { dev_kfree_skb(skb); skb = NULL; } else { u8 *data = skb->data; size_t len = skb->len; u8 *new = __skb_push(skb, align); memmove(new, data, len); __skb_trim(skb, len); } } #endif if (skb) { /* deliver to local stack */ skb->protocol = eth_type_trans(skb, dev); memset(skb->cb, 0, sizeof(skb->cb)); netif_rx(skb); } } if (xmit_skb) { /* send to wireless media */ xmit_skb->protocol = htons(ETH_P_802_3); skb_reset_network_header(xmit_skb); skb_reset_mac_header(xmit_skb); dev_queue_xmit(xmit_skb); } } static ieee80211_rx_result debug_noinline ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) { struct net_device *dev = rx->dev; struct ieee80211_local *local = rx->local; u16 ethertype; u8 *payload; struct sk_buff *skb = rx->skb, *frame = NULL; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; __le16 fc = hdr->frame_control; const struct ethhdr *eth; int remaining, err; u8 dst[ETH_ALEN]; u8 src[ETH_ALEN]; if (unlikely(!ieee80211_is_data(fc))) return RX_CONTINUE; if (unlikely(!ieee80211_is_data_present(fc))) return RX_DROP_MONITOR; if (!(rx->flags & IEEE80211_RX_AMSDU)) return RX_CONTINUE; err = ieee80211_data_to_8023(rx); if (unlikely(err)) return RX_DROP_UNUSABLE; skb->dev = dev; dev->stats.rx_packets++; dev->stats.rx_bytes += skb->len; /* skip the wrapping header */ eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr)); if (!eth) return RX_DROP_UNUSABLE; while (skb != frame) { u8 padding; __be16 len = eth->h_proto; unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len); remaining = skb->len; memcpy(dst, eth->h_dest, ETH_ALEN); memcpy(src, eth->h_source, ETH_ALEN); padding = ((4 - subframe_len) & 0x3); /* the last MSDU has no padding */ if (subframe_len > remaining) return RX_DROP_UNUSABLE; skb_pull(skb, sizeof(struct ethhdr)); /* if last subframe reuse skb */ if (remaining <= subframe_len + padding) frame = skb; else { /* * Allocate and reserve two bytes more for payload * alignment since sizeof(struct ethhdr) is 14. */ frame = dev_alloc_skb( ALIGN(local->hw.extra_tx_headroom, 4) + subframe_len + 2); if (frame == NULL) return RX_DROP_UNUSABLE; skb_reserve(frame, ALIGN(local->hw.extra_tx_headroom, 4) + sizeof(struct ethhdr) + 2); memcpy(skb_put(frame, ntohs(len)), skb->data, ntohs(len)); eth = (struct ethhdr *) skb_pull(skb, ntohs(len) + padding); if (!eth) { dev_kfree_skb(frame); return RX_DROP_UNUSABLE; } } skb_reset_network_header(frame); frame->dev = dev; frame->priority = skb->priority; rx->skb = frame; payload = frame->data; ethertype = (payload[6] << 8) | payload[7]; if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || compare_ether_addr(payload, bridge_tunnel_header) == 0)) { /* remove RFC1042 or Bridge-Tunnel * encapsulation and replace EtherType */ skb_pull(frame, 6); memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); } else { memcpy(skb_push(frame, sizeof(__be16)), &len, sizeof(__be16)); memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); } if (!ieee80211_frame_allowed(rx, fc)) { if (skb == frame) /* last frame */ return RX_DROP_UNUSABLE; dev_kfree_skb(frame); continue; } ieee80211_deliver_skb(rx); } return RX_QUEUED; } #ifdef CONFIG_MAC80211_MESH static ieee80211_rx_result ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) { struct ieee80211_hdr *hdr; struct ieee80211s_hdr *mesh_hdr; unsigned int hdrlen; struct sk_buff *skb = rx->skb, *fwd_skb; hdr = (struct ieee80211_hdr *) skb->data; hdrlen = ieee80211_hdrlen(hdr->frame_control); mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); if (!ieee80211_is_data(hdr->frame_control)) return RX_CONTINUE; if (!mesh_hdr->ttl) /* illegal frame */ return RX_DROP_MONITOR; if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6){ struct ieee80211_sub_if_data *sdata; struct mesh_path *mppath; sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); rcu_read_lock(); mppath = mpp_path_lookup(mesh_hdr->eaddr2, sdata); if (!mppath) { mpp_path_add(mesh_hdr->eaddr2, hdr->addr4, sdata); } else { spin_lock_bh(&mppath->state_lock); mppath->exp_time = jiffies; if (compare_ether_addr(mppath->mpp, hdr->addr4) != 0) memcpy(mppath->mpp, hdr->addr4, ETH_ALEN); spin_unlock_bh(&mppath->state_lock); } rcu_read_unlock(); } if (compare_ether_addr(rx->dev->dev_addr, hdr->addr3) == 0) return RX_CONTINUE; mesh_hdr->ttl--; if (rx->flags & IEEE80211_RX_RA_MATCH) { if (!mesh_hdr->ttl) IEEE80211_IFSTA_MESH_CTR_INC(&rx->sdata->u.mesh, dropped_frames_ttl); else { struct ieee80211_hdr *fwd_hdr; fwd_skb = skb_copy(skb, GFP_ATOMIC); if (!fwd_skb && net_ratelimit()) printk(KERN_DEBUG "%s: failed to clone mesh frame\n", rx->dev->name); fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; /* * Save TA to addr1 to send TA a path error if a * suitable next hop is not found */ memcpy(fwd_hdr->addr1, fwd_hdr->addr2, ETH_ALEN); memcpy(fwd_hdr->addr2, rx->dev->dev_addr, ETH_ALEN); fwd_skb->dev = rx->local->mdev; fwd_skb->iif = rx->dev->ifindex; dev_queue_xmit(fwd_skb); } } if (is_multicast_ether_addr(hdr->addr3) || rx->dev->flags & IFF_PROMISC) return RX_CONTINUE; else return RX_DROP_MONITOR; } #endif static ieee80211_rx_result debug_noinline ieee80211_rx_h_data(struct ieee80211_rx_data *rx) { struct net_device *dev = rx->dev; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; __le16 fc = hdr->frame_control; int err; if (unlikely(!ieee80211_is_data(hdr->frame_control))) return RX_CONTINUE; if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) return RX_DROP_MONITOR; err = ieee80211_data_to_8023(rx); if (unlikely(err)) return RX_DROP_UNUSABLE; if (!ieee80211_frame_allowed(rx, fc)) return RX_DROP_MONITOR; rx->skb->dev = dev; dev->stats.rx_packets++; dev->stats.rx_bytes += rx->skb->len; ieee80211_deliver_skb(rx); return RX_QUEUED; } static ieee80211_rx_result debug_noinline ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx) { struct ieee80211_local *local = rx->local; struct ieee80211_hw *hw = &local->hw; struct sk_buff *skb = rx->skb; struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; struct tid_ampdu_rx *tid_agg_rx; u16 start_seq_num; u16 tid; if (likely(!ieee80211_is_ctl(bar->frame_control))) return RX_CONTINUE; if (ieee80211_is_back_req(bar->frame_control)) { if (!rx->sta) return RX_CONTINUE; tid = le16_to_cpu(bar->control) >> 12; if (rx->sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_OPERATIONAL) return RX_CONTINUE; tid_agg_rx = rx->sta->ampdu_mlme.tid_rx[tid]; start_seq_num = le16_to_cpu(bar->start_seq_num) >> 4; /* reset session timer */ if (tid_agg_rx->timeout) mod_timer(&tid_agg_rx->session_timer, TU_TO_EXP_TIME(tid_agg_rx->timeout)); /* manage reordering buffer according to requested */ /* sequence number */ rcu_read_lock(); ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, NULL, start_seq_num, 1); rcu_read_unlock(); return RX_DROP_UNUSABLE; } return RX_CONTINUE; } static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len) { struct ieee80211_local *local = sdata->local; struct sk_buff *skb; struct ieee80211_mgmt *resp; if (compare_ether_addr(mgmt->da, sdata->dev->dev_addr) != 0) { /* Not to own unicast address */ return; } if (compare_ether_addr(mgmt->sa, sdata->u.mgd.bssid) != 0 || compare_ether_addr(mgmt->bssid, sdata->u.mgd.bssid) != 0) { /* Not from the current AP. */ return; } if (sdata->u.mgd.state == IEEE80211_STA_MLME_ASSOCIATE) { /* Association in progress; ignore SA Query */ return; } if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { /* Too short SA Query request frame */ return; } skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); if (skb == NULL) return; skb_reserve(skb, local->hw.extra_tx_headroom); resp = (struct ieee80211_mgmt *) skb_put(skb, 24); memset(resp, 0, 24); memcpy(resp->da, mgmt->sa, ETH_ALEN); memcpy(resp->sa, sdata->dev->dev_addr, ETH_ALEN); memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION); skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); resp->u.action.category = WLAN_CATEGORY_SA_QUERY; resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; memcpy(resp->u.action.u.sa_query.trans_id, mgmt->u.action.u.sa_query.trans_id, WLAN_SA_QUERY_TR_ID_LEN); ieee80211_tx_skb(sdata, skb, 1); } static ieee80211_rx_result debug_noinline ieee80211_rx_h_action(struct ieee80211_rx_data *rx) { struct ieee80211_local *local = rx->local; struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; struct ieee80211_bss *bss; int len = rx->skb->len; if (!ieee80211_is_action(mgmt->frame_control)) return RX_CONTINUE; if (!rx->sta) return RX_DROP_MONITOR; if (!(rx->flags & IEEE80211_RX_RA_MATCH)) return RX_DROP_MONITOR; if (ieee80211_drop_unencrypted(rx, mgmt->frame_control)) return RX_DROP_MONITOR; /* all categories we currently handle have action_code */ if (len < IEEE80211_MIN_ACTION_SIZE + 1) return RX_DROP_MONITOR; switch (mgmt->u.action.category) { case WLAN_CATEGORY_BACK: /* * The aggregation code is not prepared to handle * anything but STA/AP due to the BSSID handling; * IBSS could work in the code but isn't supported * by drivers or the standard. */ if (sdata->vif.type != NL80211_IFTYPE_STATION && sdata->vif.type != NL80211_IFTYPE_AP_VLAN && sdata->vif.type != NL80211_IFTYPE_AP) return RX_DROP_MONITOR; switch (mgmt->u.action.u.addba_req.action_code) { case WLAN_ACTION_ADDBA_REQ: if (len < (IEEE80211_MIN_ACTION_SIZE + sizeof(mgmt->u.action.u.addba_req))) return RX_DROP_MONITOR; ieee80211_process_addba_request(local, rx->sta, mgmt, len); break; case WLAN_ACTION_ADDBA_RESP: if (len < (IEEE80211_MIN_ACTION_SIZE + sizeof(mgmt->u.action.u.addba_resp))) return RX_DROP_MONITOR; ieee80211_process_addba_resp(local, rx->sta, mgmt, len); break; case WLAN_ACTION_DELBA: if (len < (IEEE80211_MIN_ACTION_SIZE + sizeof(mgmt->u.action.u.delba))) return RX_DROP_MONITOR; ieee80211_process_delba(sdata, rx->sta, mgmt, len); break; } break; case WLAN_CATEGORY_SPECTRUM_MGMT: if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ) return RX_DROP_MONITOR; if (sdata->vif.type != NL80211_IFTYPE_STATION) return RX_DROP_MONITOR; switch (mgmt->u.action.u.measurement.action_code) { case WLAN_ACTION_SPCT_MSR_REQ: if (len < (IEEE80211_MIN_ACTION_SIZE + sizeof(mgmt->u.action.u.measurement))) return RX_DROP_MONITOR; ieee80211_process_measurement_req(sdata, mgmt, len); break; case WLAN_ACTION_SPCT_CHL_SWITCH: if (len < (IEEE80211_MIN_ACTION_SIZE + sizeof(mgmt->u.action.u.chan_switch))) return RX_DROP_MONITOR; if (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN)) return RX_DROP_MONITOR; bss = ieee80211_rx_bss_get(local, sdata->u.mgd.bssid, local->hw.conf.channel->center_freq, sdata->u.mgd.ssid, sdata->u.mgd.ssid_len); if (!bss) return RX_DROP_MONITOR; ieee80211_process_chanswitch(sdata, &mgmt->u.action.u.chan_switch.sw_elem, bss); ieee80211_rx_bss_put(local, bss); break; } break; case WLAN_CATEGORY_SA_QUERY: if (len < (IEEE80211_MIN_ACTION_SIZE + sizeof(mgmt->u.action.u.sa_query))) return RX_DROP_MONITOR; switch (mgmt->u.action.u.sa_query.action) { case WLAN_ACTION_SA_QUERY_REQUEST: if (sdata->vif.type != NL80211_IFTYPE_STATION) return RX_DROP_MONITOR; ieee80211_process_sa_query_req(sdata, mgmt, len); break; case WLAN_ACTION_SA_QUERY_RESPONSE: /* * SA Query response is currently only used in AP mode * and it is processed in user space. */ return RX_CONTINUE; } break; default: return RX_CONTINUE; } rx->sta->rx_packets++; dev_kfree_skb(rx->skb); return RX_QUEUED; } static ieee80211_rx_result debug_noinline ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; if (!(rx->flags & IEEE80211_RX_RA_MATCH)) return RX_DROP_MONITOR; if (ieee80211_drop_unencrypted(rx, mgmt->frame_control)) return RX_DROP_MONITOR; if (ieee80211_vif_is_mesh(&sdata->vif)) return ieee80211_mesh_rx_mgmt(sdata, rx->skb, rx->status); if (sdata->vif.type != NL80211_IFTYPE_STATION && sdata->vif.type != NL80211_IFTYPE_ADHOC) return RX_DROP_MONITOR; if (sdata->vif.type == NL80211_IFTYPE_STATION) { if (sdata->flags & IEEE80211_SDATA_USERSPACE_MLME) return RX_DROP_MONITOR; return ieee80211_sta_rx_mgmt(sdata, rx->skb, rx->status); } return ieee80211_ibss_rx_mgmt(sdata, rx->skb, rx->status); } static void ieee80211_rx_michael_mic_report(struct net_device *dev, struct ieee80211_hdr *hdr, struct ieee80211_rx_data *rx) { int keyidx; unsigned int hdrlen; hdrlen = ieee80211_hdrlen(hdr->frame_control); if (rx->skb->len >= hdrlen + 4) keyidx = rx->skb->data[hdrlen + 3] >> 6; else keyidx = -1; if (!rx->sta) { /* * Some hardware seem to generate incorrect Michael MIC * reports; ignore them to avoid triggering countermeasures. */ goto ignore; } if (!ieee80211_has_protected(hdr->frame_control)) goto ignore; if (rx->sdata->vif.type == NL80211_IFTYPE_AP && keyidx) { /* * APs with pairwise keys should never receive Michael MIC * errors for non-zero keyidx because these are reserved for * group keys and only the AP is sending real multicast * frames in the BSS. */ goto ignore; } if (!ieee80211_is_data(hdr->frame_control) && !ieee80211_is_auth(hdr->frame_control)) goto ignore; mac80211_ev_michael_mic_failure(rx->sdata, keyidx, hdr); ignore: dev_kfree_skb(rx->skb); rx->skb = NULL; } /* TODO: use IEEE80211_RX_FRAGMENTED */ static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx) { struct ieee80211_sub_if_data *sdata; struct ieee80211_local *local = rx->local; struct ieee80211_rtap_hdr { struct ieee80211_radiotap_header hdr; u8 flags; u8 rate; __le16 chan_freq; __le16 chan_flags; } __attribute__ ((packed)) *rthdr; struct sk_buff *skb = rx->skb, *skb2; struct net_device *prev_dev = NULL; struct ieee80211_rx_status *status = rx->status; if (rx->flags & IEEE80211_RX_CMNTR_REPORTED) goto out_free_skb; if (skb_headroom(skb) < sizeof(*rthdr) && pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC)) goto out_free_skb; rthdr = (void *)skb_push(skb, sizeof(*rthdr)); memset(rthdr, 0, sizeof(*rthdr)); rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); rthdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | (1 << IEEE80211_RADIOTAP_RATE) | (1 << IEEE80211_RADIOTAP_CHANNEL)); rthdr->rate = rx->rate->bitrate / 5; rthdr->chan_freq = cpu_to_le16(status->freq); if (status->band == IEEE80211_BAND_5GHZ) rthdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ); else rthdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ); skb_set_mac_header(skb, 0); skb->ip_summed = CHECKSUM_UNNECESSARY; skb->pkt_type = PACKET_OTHERHOST; skb->protocol = htons(ETH_P_802_2); list_for_each_entry_rcu(sdata, &local->interfaces, list) { if (!netif_running(sdata->dev)) continue; if (sdata->vif.type != NL80211_IFTYPE_MONITOR || !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) continue; if (prev_dev) { skb2 = skb_clone(skb, GFP_ATOMIC); if (skb2) { skb2->dev = prev_dev; netif_rx(skb2); } } prev_dev = sdata->dev; sdata->dev->stats.rx_packets++; sdata->dev->stats.rx_bytes += skb->len; } if (prev_dev) { skb->dev = prev_dev; netif_rx(skb); skb = NULL; } else goto out_free_skb; rx->flags |= IEEE80211_RX_CMNTR_REPORTED; return; out_free_skb: dev_kfree_skb(skb); } static void ieee80211_invoke_rx_handlers(struct ieee80211_sub_if_data *sdata, struct ieee80211_rx_data *rx, struct sk_buff *skb) { ieee80211_rx_result res = RX_DROP_MONITOR; rx->skb = skb; rx->sdata = sdata; rx->dev = sdata->dev; #define CALL_RXH(rxh) \ do { \ res = rxh(rx); \ if (res != RX_CONTINUE) \ goto rxh_done; \ } while (0); CALL_RXH(ieee80211_rx_h_passive_scan) CALL_RXH(ieee80211_rx_h_check) CALL_RXH(ieee80211_rx_h_decrypt) CALL_RXH(ieee80211_rx_h_check_more_data) CALL_RXH(ieee80211_rx_h_sta_process) CALL_RXH(ieee80211_rx_h_defragment) CALL_RXH(ieee80211_rx_h_ps_poll) CALL_RXH(ieee80211_rx_h_michael_mic_verify) /* must be after MMIC verify so header is counted in MPDU mic */ CALL_RXH(ieee80211_rx_h_remove_qos_control) CALL_RXH(ieee80211_rx_h_amsdu) #ifdef CONFIG_MAC80211_MESH if (ieee80211_vif_is_mesh(&sdata->vif)) CALL_RXH(ieee80211_rx_h_mesh_fwding); #endif CALL_RXH(ieee80211_rx_h_data) CALL_RXH(ieee80211_rx_h_ctrl) CALL_RXH(ieee80211_rx_h_action) CALL_RXH(ieee80211_rx_h_mgmt) #undef CALL_RXH rxh_done: switch (res) { case RX_DROP_MONITOR: I802_DEBUG_INC(sdata->local->rx_handlers_drop); if (rx->sta) rx->sta->rx_dropped++; /* fall through */ case RX_CONTINUE: ieee80211_rx_cooked_monitor(rx); break; case RX_DROP_UNUSABLE: I802_DEBUG_INC(sdata->local->rx_handlers_drop); if (rx->sta) rx->sta->rx_dropped++; dev_kfree_skb(rx->skb); break; case RX_QUEUED: I802_DEBUG_INC(sdata->local->rx_handlers_queued); break; } } /* main receive path */ static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata, struct ieee80211_rx_data *rx, struct ieee80211_hdr *hdr) { u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, sdata->vif.type); int multicast = is_multicast_ether_addr(hdr->addr1); switch (sdata->vif.type) { case NL80211_IFTYPE_STATION: if (!bssid) return 0; if (!ieee80211_bssid_match(bssid, sdata->u.mgd.bssid)) { if (!(rx->flags & IEEE80211_RX_IN_SCAN)) return 0; rx->flags &= ~IEEE80211_RX_RA_MATCH; } else if (!multicast && compare_ether_addr(sdata->dev->dev_addr, hdr->addr1) != 0) { if (!(sdata->dev->flags & IFF_PROMISC)) return 0; rx->flags &= ~IEEE80211_RX_RA_MATCH; } break; case NL80211_IFTYPE_ADHOC: if (!bssid) return 0; if (ieee80211_is_beacon(hdr->frame_control)) { return 1; } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { if (!(rx->flags & IEEE80211_RX_IN_SCAN)) return 0; rx->flags &= ~IEEE80211_RX_RA_MATCH; } else if (!multicast && compare_ether_addr(sdata->dev->dev_addr, hdr->addr1) != 0) { if (!(sdata->dev->flags & IFF_PROMISC)) return 0; rx->flags &= ~IEEE80211_RX_RA_MATCH; } else if (!rx->sta) { int rate_idx; if (rx->status->flag & RX_FLAG_HT) rate_idx = 0; /* TODO: HT rates */ else rate_idx = rx->status->rate_idx; rx->sta = ieee80211_ibss_add_sta(sdata, bssid, hdr->addr2, BIT(rate_idx)); } break; case NL80211_IFTYPE_MESH_POINT: if (!multicast && compare_ether_addr(sdata->dev->dev_addr, hdr->addr1) != 0) { if (!(sdata->dev->flags & IFF_PROMISC)) return 0; rx->flags &= ~IEEE80211_RX_RA_MATCH; } break; case NL80211_IFTYPE_AP_VLAN: case NL80211_IFTYPE_AP: if (!bssid) { if (compare_ether_addr(sdata->dev->dev_addr, hdr->addr1)) return 0; } else if (!ieee80211_bssid_match(bssid, sdata->dev->dev_addr)) { if (!(rx->flags & IEEE80211_RX_IN_SCAN)) return 0; rx->flags &= ~IEEE80211_RX_RA_MATCH; } break; case NL80211_IFTYPE_WDS: if (bssid || !ieee80211_is_data(hdr->frame_control)) return 0; if (compare_ether_addr(sdata->u.wds.remote_addr, hdr->addr2)) return 0; break; case NL80211_IFTYPE_MONITOR: /* take everything */ break; case NL80211_IFTYPE_UNSPECIFIED: case __NL80211_IFTYPE_AFTER_LAST: /* should never get here */ WARN_ON(1); break; } return 1; } /* * This is the actual Rx frames handler. as it blongs to Rx path it must * be called with rcu_read_lock protection. */ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, struct sk_buff *skb, struct ieee80211_rx_status *status, struct ieee80211_rate *rate) { struct ieee80211_local *local = hw_to_local(hw); struct ieee80211_sub_if_data *sdata; struct ieee80211_hdr *hdr; struct ieee80211_rx_data rx; int prepares; struct ieee80211_sub_if_data *prev = NULL; struct sk_buff *skb_new; hdr = (struct ieee80211_hdr *)skb->data; memset(&rx, 0, sizeof(rx)); rx.skb = skb; rx.local = local; rx.status = status; rx.rate = rate; if (ieee80211_is_data(hdr->frame_control) || ieee80211_is_mgmt(hdr->frame_control)) local->dot11ReceivedFragmentCount++; rx.sta = sta_info_get(local, hdr->addr2); if (rx.sta) { rx.sdata = rx.sta->sdata; rx.dev = rx.sta->sdata->dev; } if ((status->flag & RX_FLAG_MMIC_ERROR)) { ieee80211_rx_michael_mic_report(local->mdev, hdr, &rx); return; } if (unlikely(local->sw_scanning || local->hw_scanning)) rx.flags |= IEEE80211_RX_IN_SCAN; ieee80211_parse_qos(&rx); ieee80211_verify_alignment(&rx); skb = rx.skb; list_for_each_entry_rcu(sdata, &local->interfaces, list) { if (!netif_running(sdata->dev)) continue; if (sdata->vif.type == NL80211_IFTYPE_MONITOR) continue; rx.flags |= IEEE80211_RX_RA_MATCH; prepares = prepare_for_handlers(sdata, &rx, hdr); if (!prepares) continue; /* * frame is destined for this interface, but if it's not * also for the previous one we handle that after the * loop to avoid copying the SKB once too much */ if (!prev) { prev = sdata; continue; } /* * frame was destined for the previous interface * so invoke RX handlers for it */ skb_new = skb_copy(skb, GFP_ATOMIC); if (!skb_new) { if (net_ratelimit()) printk(KERN_DEBUG "%s: failed to copy " "multicast frame for %s\n", wiphy_name(local->hw.wiphy), prev->dev->name); continue; } ieee80211_invoke_rx_handlers(prev, &rx, skb_new); prev = sdata; } if (prev) ieee80211_invoke_rx_handlers(prev, &rx, skb); else dev_kfree_skb(skb); } #define SEQ_MODULO 0x1000 #define SEQ_MASK 0xfff static inline int seq_less(u16 sq1, u16 sq2) { return ((sq1 - sq2) & SEQ_MASK) > (SEQ_MODULO >> 1); } static inline u16 seq_inc(u16 sq) { return (sq + 1) & SEQ_MASK; } static inline u16 seq_sub(u16 sq1, u16 sq2) { return (sq1 - sq2) & SEQ_MASK; } /* * As it function blongs to Rx path it must be called with * the proper rcu_read_lock protection for its flow. */ static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw, struct tid_ampdu_rx *tid_agg_rx, struct sk_buff *skb, u16 mpdu_seq_num, int bar_req) { struct ieee80211_local *local = hw_to_local(hw); struct ieee80211_rx_status status; u16 head_seq_num, buf_size; int index; struct ieee80211_supported_band *sband; struct ieee80211_rate *rate; buf_size = tid_agg_rx->buf_size; head_seq_num = tid_agg_rx->head_seq_num; /* frame with out of date sequence number */ if (seq_less(mpdu_seq_num, head_seq_num)) { dev_kfree_skb(skb); return 1; } /* if frame sequence number exceeds our buffering window size or * block Ack Request arrived - release stored frames */ if ((!seq_less(mpdu_seq_num, head_seq_num + buf_size)) || (bar_req)) { /* new head to the ordering buffer */ if (bar_req) head_seq_num = mpdu_seq_num; else head_seq_num = seq_inc(seq_sub(mpdu_seq_num, buf_size)); /* release stored frames up to new head to stack */ while (seq_less(tid_agg_rx->head_seq_num, head_seq_num)) { index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) % tid_agg_rx->buf_size; if (tid_agg_rx->reorder_buf[index]) { /* release the reordered frames to stack */ memcpy(&status, tid_agg_rx->reorder_buf[index]->cb, sizeof(status)); sband = local->hw.wiphy->bands[status.band]; if (status.flag & RX_FLAG_HT) { /* TODO: HT rates */ rate = sband->bitrates; } else { rate = &sband->bitrates [status.rate_idx]; } __ieee80211_rx_handle_packet(hw, tid_agg_rx->reorder_buf[index], &status, rate); tid_agg_rx->stored_mpdu_num--; tid_agg_rx->reorder_buf[index] = NULL; } tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num); } if (bar_req) return 1; } /* now the new frame is always in the range of the reordering */ /* buffer window */ index = seq_sub(mpdu_seq_num, tid_agg_rx->ssn) % tid_agg_rx->buf_size; /* check if we already stored this frame */ if (tid_agg_rx->reorder_buf[index]) { dev_kfree_skb(skb); return 1; } /* if arrived mpdu is in the right order and nothing else stored */ /* release it immediately */ if (mpdu_seq_num == tid_agg_rx->head_seq_num && tid_agg_rx->stored_mpdu_num == 0) { tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num); return 0; } /* put the frame in the reordering buffer */ tid_agg_rx->reorder_buf[index] = skb; tid_agg_rx->stored_mpdu_num++; /* release the buffer until next missing frame */ index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) % tid_agg_rx->buf_size; while (tid_agg_rx->reorder_buf[index]) { /* release the reordered frame back to stack */ memcpy(&status, tid_agg_rx->reorder_buf[index]->cb, sizeof(status)); sband = local->hw.wiphy->bands[status.band]; if (status.flag & RX_FLAG_HT) rate = sband->bitrates; /* TODO: HT rates */ else rate = &sband->bitrates[status.rate_idx]; __ieee80211_rx_handle_packet(hw, tid_agg_rx->reorder_buf[index], &status, rate); tid_agg_rx->stored_mpdu_num--; tid_agg_rx->reorder_buf[index] = NULL; tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num); index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn) % tid_agg_rx->buf_size; } return 1; } static u8 ieee80211_rx_reorder_ampdu(struct ieee80211_local *local, struct sk_buff *skb) { struct ieee80211_hw *hw = &local->hw; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; struct sta_info *sta; struct tid_ampdu_rx *tid_agg_rx; u16 sc; u16 mpdu_seq_num; u8 ret = 0; int tid; sta = sta_info_get(local, hdr->addr2); if (!sta) return ret; /* filter the QoS data rx stream according to * STA/TID and check if this STA/TID is on aggregation */ if (!ieee80211_is_data_qos(hdr->frame_control)) goto end_reorder; tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_OPERATIONAL) goto end_reorder; tid_agg_rx = sta->ampdu_mlme.tid_rx[tid]; /* qos null data frames are excluded */ if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) goto end_reorder; /* new un-ordered ampdu frame - process it */ /* reset session timer */ if (tid_agg_rx->timeout) mod_timer(&tid_agg_rx->session_timer, TU_TO_EXP_TIME(tid_agg_rx->timeout)); /* if this mpdu is fragmented - terminate rx aggregation session */ sc = le16_to_cpu(hdr->seq_ctrl); if (sc & IEEE80211_SCTL_FRAG) { ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->sta.addr, tid, 0, WLAN_REASON_QSTA_REQUIRE_SETUP); ret = 1; goto end_reorder; } /* according to mpdu sequence number deal with reordering buffer */ mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; ret = ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb, mpdu_seq_num, 0); end_reorder: return ret; } /* * This is the receive path handler. It is called by a low level driver when an * 802.11 MPDU is received from the hardware. */ void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, struct ieee80211_rx_status *status) { struct ieee80211_local *local = hw_to_local(hw); struct ieee80211_rate *rate = NULL; struct ieee80211_supported_band *sband; if (status->band < 0 || status->band >= IEEE80211_NUM_BANDS) { WARN_ON(1); return; } sband = local->hw.wiphy->bands[status->band]; if (!sband) { WARN_ON(1); return; } if (status->flag & RX_FLAG_HT) { /* rate_idx is MCS index */ if (WARN_ON(status->rate_idx < 0 || status->rate_idx >= 76)) return; /* HT rates are not in the table - use the highest legacy rate * for now since other parts of mac80211 may not yet be fully * MCS aware. */ rate = &sband->bitrates[sband->n_bitrates - 1]; } else { if (WARN_ON(status->rate_idx < 0 || status->rate_idx >= sband->n_bitrates)) return; rate = &sband->bitrates[status->rate_idx]; } /* * key references and virtual interfaces are protected using RCU * and this requires that we are in a read-side RCU section during * receive processing */ rcu_read_lock(); /* * Frames with failed FCS/PLCP checksum are not returned, * all other frames are returned without radiotap header * if it was previously present. * Also, frames with less than 16 bytes are dropped. */ skb = ieee80211_rx_monitor(local, skb, status, rate); if (!skb) { rcu_read_unlock(); return; } if (!ieee80211_rx_reorder_ampdu(local, skb)) __ieee80211_rx_handle_packet(hw, skb, status, rate); rcu_read_unlock(); } EXPORT_SYMBOL(__ieee80211_rx); /* This is a version of the rx handler that can be called from hard irq * context. Post the skb on the queue and schedule the tasklet */ void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb, struct ieee80211_rx_status *status) { struct ieee80211_local *local = hw_to_local(hw); BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); skb->dev = local->mdev; /* copy status into skb->cb for use by tasklet */ memcpy(skb->cb, status, sizeof(*status)); skb->pkt_type = IEEE80211_RX_MSG; skb_queue_tail(&local->skb_queue, skb); tasklet_schedule(&local->tasklet); } EXPORT_SYMBOL(ieee80211_rx_irqsafe);


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