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-rw-r--r--drivers/net/wireless/mac80211_hwsim.c33
-rw-r--r--include/net/mac80211.h12
-rw-r--r--net/mac80211/rx.c71
3 files changed, 103 insertions, 13 deletions
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index ce522aa..c242f5a 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -751,7 +751,11 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
continue;
}
- nskb = skb_copy(skb, GFP_ATOMIC);
+ /*
+ * reserve some space for our vendor and the normal
+ * radiotap header, since we're copying anyway
+ */
+ nskb = skb_copy_expand(skb, 64, 0, GFP_ATOMIC);
if (nskb == NULL)
continue;
@@ -769,6 +773,33 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
(data->tsf_offset - data2->tsf_offset) +
24 * 8 * 10 / txrate->bitrate);
+#if 0
+ /*
+ * Don't enable this code by default as the OUI 00:00:00
+ * is registered to Xerox so we shouldn't use it here, it
+ * might find its way into pcap files.
+ * Note that this code requires the headroom in the SKB
+ * that was allocated earlier.
+ */
+ rx_status.vendor_radiotap_oui[0] = 0x00;
+ rx_status.vendor_radiotap_oui[1] = 0x00;
+ rx_status.vendor_radiotap_oui[2] = 0x00;
+ rx_status.vendor_radiotap_subns = 127;
+ /*
+ * Radiotap vendor namespaces can (and should) also be
+ * split into fields by using the standard radiotap
+ * presence bitmap mechanism. Use just BIT(0) here for
+ * the presence bitmap.
+ */
+ rx_status.vendor_radiotap_bitmap = BIT(0);
+ /* We have 8 bytes of (dummy) data */
+ rx_status.vendor_radiotap_len = 8;
+ /* For testing, also require it to be aligned */
+ rx_status.vendor_radiotap_align = 8;
+ /* push the data */
+ memcpy(skb_push(nskb, 8), "ABCDEFGH", 8);
+#endif
+
memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
ieee80211_rx_irqsafe(data2->hw, nskb);
}
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index b484a65..dd08fbb 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -789,12 +789,21 @@ enum mac80211_rx_flags {
* @ampdu_reference: A-MPDU reference number, must be a different value for
* each A-MPDU but the same for each subframe within one A-MPDU
* @ampdu_delimiter_crc: A-MPDU delimiter CRC
+ * @vendor_radiotap_bitmap: radiotap vendor namespace presence bitmap
+ * @vendor_radiotap_len: radiotap vendor namespace length
+ * @vendor_radiotap_align: radiotap vendor namespace alignment. Note
+ * that the actual data must be at the start of the SKB data
+ * already.
+ * @vendor_radiotap_oui: radiotap vendor namespace OUI
+ * @vendor_radiotap_subns: radiotap vendor sub namespace
*/
struct ieee80211_rx_status {
u64 mactime;
u32 device_timestamp;
u32 ampdu_reference;
u32 flag;
+ u32 vendor_radiotap_bitmap;
+ u16 vendor_radiotap_len;
u16 freq;
u8 rate_idx;
u8 rx_flags;
@@ -802,6 +811,9 @@ struct ieee80211_rx_status {
u8 antenna;
s8 signal;
u8 ampdu_delimiter_crc;
+ u8 vendor_radiotap_align;
+ u8 vendor_radiotap_oui[3];
+ u8 vendor_radiotap_subns;
};
/**
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 8480bbf..ec15a492 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -40,6 +40,8 @@
static struct sk_buff *remove_monitor_info(struct ieee80211_local *local,
struct sk_buff *skb)
{
+ struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+
if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) {
if (likely(skb->len > FCS_LEN))
__pskb_trim(skb, skb->len - FCS_LEN);
@@ -51,6 +53,9 @@ static struct sk_buff *remove_monitor_info(struct ieee80211_local *local,
}
}
+ if (status->vendor_radiotap_len)
+ __pskb_pull(skb, status->vendor_radiotap_len);
+
return skb;
}
@@ -73,32 +78,48 @@ static inline int should_drop_frame(struct sk_buff *skb, int present_fcs_len)
}
static int
-ieee80211_rx_radiotap_len(struct ieee80211_local *local,
- struct ieee80211_rx_status *status)
+ieee80211_rx_radiotap_space(struct ieee80211_local *local,
+ struct ieee80211_rx_status *status)
{
int len;
/* always present fields */
len = sizeof(struct ieee80211_radiotap_header) + 9;
- if (ieee80211_have_rx_timestamp(status))
+ /* allocate extra bitmap */
+ if (status->vendor_radiotap_len)
+ len += 4;
+
+ if (ieee80211_have_rx_timestamp(status)) {
+ len = ALIGN(len, 8);
len += 8;
+ }
if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
len += 1;
- if (len & 1) /* padding for RX_FLAGS if necessary */
- len++;
+ /* padding for RX_FLAGS if necessary */
+ len = ALIGN(len, 2);
if (status->flag & RX_FLAG_HT) /* HT info */
len += 3;
if (status->flag & RX_FLAG_AMPDU_DETAILS) {
- /* padding */
- while (len & 3)
- len++;
+ len = ALIGN(len, 4);
len += 8;
}
+ if (status->vendor_radiotap_len) {
+ if (WARN_ON_ONCE(status->vendor_radiotap_align == 0))
+ status->vendor_radiotap_align = 1;
+ /* align standard part of vendor namespace */
+ len = ALIGN(len, 2);
+ /* allocate standard part of vendor namespace */
+ len += 6;
+ /* align vendor-defined part */
+ len = ALIGN(len, status->vendor_radiotap_align);
+ /* vendor-defined part is already in skb */
+ }
+
return len;
}
@@ -132,14 +153,25 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
(1 << IEEE80211_RADIOTAP_CHANNEL) |
(1 << IEEE80211_RADIOTAP_ANTENNA) |
(1 << IEEE80211_RADIOTAP_RX_FLAGS));
- rthdr->it_len = cpu_to_le16(rtap_len);
+ rthdr->it_len = cpu_to_le16(rtap_len + status->vendor_radiotap_len);
pos = (unsigned char *)(rthdr + 1);
+ if (status->vendor_radiotap_len) {
+ rthdr->it_present |=
+ cpu_to_le32(BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE)) |
+ cpu_to_le32(BIT(IEEE80211_RADIOTAP_EXT));
+ put_unaligned_le32(status->vendor_radiotap_bitmap, pos);
+ pos += 4;
+ }
+
/* the order of the following fields is important */
/* IEEE80211_RADIOTAP_TSFT */
if (ieee80211_have_rx_timestamp(status)) {
+ /* padding */
+ while ((pos - (u8 *)rthdr) & 7)
+ *pos++ = 0;
put_unaligned_le64(
ieee80211_calculate_rx_timestamp(local, status,
mpdulen, 0),
@@ -211,7 +243,7 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
/* IEEE80211_RADIOTAP_RX_FLAGS */
/* ensure 2 byte alignment for the 2 byte field as required */
if ((pos - (u8 *)rthdr) & 1)
- pos++;
+ *pos++ = 0;
if (status->flag & RX_FLAG_FAILED_PLCP_CRC)
rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP;
put_unaligned_le16(rx_flags, pos);
@@ -261,6 +293,21 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
*pos++ = 0;
*pos++ = 0;
}
+
+ if (status->vendor_radiotap_len) {
+ /* ensure 2 byte alignment for the vendor field as required */
+ if ((pos - (u8 *)rthdr) & 1)
+ *pos++ = 0;
+ *pos++ = status->vendor_radiotap_oui[0];
+ *pos++ = status->vendor_radiotap_oui[1];
+ *pos++ = status->vendor_radiotap_oui[2];
+ *pos++ = status->vendor_radiotap_subns;
+ put_unaligned_le16(status->vendor_radiotap_len, pos);
+ pos += 2;
+ /* align the actual payload as requested */
+ while ((pos - (u8 *)rthdr) & (status->vendor_radiotap_align - 1))
+ *pos++ = 0;
+ }
}
/*
@@ -289,7 +336,7 @@ ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
*/
/* room for the radiotap header based on driver features */
- needed_headroom = ieee80211_rx_radiotap_len(local, status);
+ needed_headroom = ieee80211_rx_radiotap_space(local, status);
if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
present_fcs_len = FCS_LEN;
@@ -2593,7 +2640,7 @@ static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx,
goto out_free_skb;
/* room for the radiotap header based on driver features */
- needed_headroom = ieee80211_rx_radiotap_len(local, status);
+ needed_headroom = ieee80211_rx_radiotap_space(local, status);
if (skb_headroom(skb) < needed_headroom &&
pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC))
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