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mac80211: don't initiate path discovery when forwarding frame with unknown DA

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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>
This commit is contained in:
Thomas Pedersen
2011-11-24 17:15:25 -08:00
committed by John W. Linville
parent dca7e9430c
commit 0cfda8519c
5 changed files with 79 additions and 77 deletions
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14
net/mac80211/rx.c
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@@ -1899,6 +1899,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
struct ieee80211_local *local = rx->local;
struct ieee80211_sub_if_data *sdata = rx->sdata;
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
__le16 reason = cpu_to_le16(WLAN_REASON_MESH_PATH_NOFORWARD);
u16 q;
hdr = (struct ieee80211_hdr *) skb->data;
@@ -1985,13 +1986,14 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
fwded_mcast);
memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
} else {
int err;
err = mesh_nexthop_lookup(fwd_skb, sdata);
/* Failed to immediately resolve next hop:
* fwded frame was dropped or will be added
* later to the pending skb queue. */
if (err)
if (mesh_nexthop_lookup(fwd_skb, sdata)) {
/* can't resolve next hop, send a PERR */
mesh_path_error_tx(sdata->u.mesh.mshcfg.element_ttl,
fwd_hdr->addr3, 0, reason,
fwd_hdr->addr2, sdata);
sdata->u.mesh.mshstats.dropped_frames_no_route++;
return RX_DROP_MONITOR;
}
IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.mesh,
fwded_unicast);