Search Linux Wireless

[PATCH] mac80211: check if mesh frame is in RMC after decrypt

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



To check whether a frame is in the RMC, we need access to the mesh
header.  This header is encrypted in encrypted data frames, so make this
check after the frame has been decrypted.

Signed-off-by: Thomas Pedersen <thomas@xxxxxxxxxxx>
---
 net/mac80211/rx.c |   15 ++++++---------
 1 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 1fe26fa..9410b9f 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -476,7 +476,6 @@ 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);
 	char *dev_addr = rx->sdata->vif.addr;
 
 	if (ieee80211_is_data(hdr->frame_control)) {
@@ -524,14 +523,6 @@ ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
 
 	}
 
-#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->addr3, msh_h_get(hdr, hdrlen), rx->sdata))
-		return RX_DROP_MONITOR;
-#undef msh_h_get
-
 	return RX_CONTINUE;
 }
 
@@ -1827,6 +1818,12 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
 	hdrlen = ieee80211_hdrlen(hdr->frame_control);
 	mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
 
+	/* frame is in RMC, don't forward */
+	if (ieee80211_is_data(hdr->frame_control) &&
+	    is_multicast_ether_addr(hdr->addr1) &&
+	    mesh_rmc_check(hdr->addr3, mesh_hdr, rx->sdata))
+		return RX_DROP_MONITOR;
+
 	if (!ieee80211_is_data(hdr->frame_control))
 		return RX_CONTINUE;
 
-- 
1.7.4.1

--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Host AP]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Linux Kernel]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Device Mapper]
  Powered by Linux