From 2157fdd6ae3f760a95c5c50072a1b4ac656eb9f5 Mon Sep 17 00:00:00 2001 From: Thomas Pedersen Date: Thu, 1 Sep 2011 12:32:14 -0700 Subject: [PATCH] mac80211: check if mesh frame is in RMC after decrypt 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 Signed-off-by: Javier Cardona Signed-off-by: John W. Linville --- net/mac80211/rx.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index f45fd2fedc24..d479d48e8d18 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; } @@ -1840,6 +1831,12 @@ 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; -- 2.20.1