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authorThomas Pedersen <thomas@cozybit.com>2011-11-25 05:15:25 +0400
committerJohn W. Linville <linville@tuxdriver.com>2011-11-28 23:44:07 +0400
commit0cfda8519c85eb279166fb55a8553ee66eac9b35 (patch)
tree55f917c9402c0164a76c80b4675ea173562a869f /net/mac80211/mesh_pathtbl.c
parentdca7e9430cb3e492437a5ce891b8b3e315c147ca (diff)
downloadlinux-0cfda8519c85eb279166fb55a8553ee66eac9b35.tar.xz
mac80211: don't initiate path discovery when forwarding frame with unknown DA
We used to initiate a path discovery when receiving a frame for which there is no forwarding information. To cut down on PREQ spam, just send a (gated) PERR in response. Also separate path discovery logic from nexthop querying. This patch means we no longer queue frames when forwarding, so kill the PERR TX stuff in discard_frame(). Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/mesh_pathtbl.c')
-rw-r--r--net/mac80211/mesh_pathtbl.c27
1 files changed, 0 insertions, 27 deletions
diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 4c50d8ade04f..edf167e3b8f3 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -973,38 +973,11 @@ int mesh_path_send_to_gates(struct mesh_path *mpath)
* @skb: frame to discard
* @sdata: network subif the frame was to be sent through
*
- * If the frame was being forwarded from another MP, a PERR frame will be sent
- * to the precursor. The precursor's address (i.e. the previous hop) was saved
- * in addr1 of the frame-to-be-forwarded, and would only be overwritten once
- * the destination is successfully resolved.
- *
* Locking: the function must me called within a rcu_read_lock region
*/
void mesh_path_discard_frame(struct sk_buff *skb,
struct ieee80211_sub_if_data *sdata)
{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- struct mesh_path *mpath;
- u32 sn = 0;
- __le16 reason = cpu_to_le16(WLAN_REASON_MESH_PATH_NOFORWARD);
-
- if (memcmp(hdr->addr4, sdata->vif.addr, ETH_ALEN) != 0) {
- u8 *ra, *da;
-
- da = hdr->addr3;
- ra = hdr->addr2;
- rcu_read_lock();
- mpath = mesh_path_lookup(da, sdata);
- if (mpath) {
- spin_lock_bh(&mpath->state_lock);
- sn = ++mpath->sn;
- spin_unlock_bh(&mpath->state_lock);
- }
- rcu_read_unlock();
- mesh_path_error_tx(sdata->u.mesh.mshcfg.element_ttl, da,
- cpu_to_le32(sn), reason, ra, sdata);
- }
-
kfree_skb(skb);
sdata->u.mesh.mshstats.dropped_frames_no_route++;
}