From 7e3c88660b5b90f437cf466b1805089ccb764ee3 Mon Sep 17 00:00:00 2001
From: Thomas Pedersen <thomas@cozybit.com>
Date: Thu, 24 Nov 2011 17:15:21 -0800
Subject: [PATCH] mac80211: failed forwarded mesh frame addressing
Don't write the TA until next hop is actually known, since we might need
the original TA for sending a PERR. Previously we would send a PERR to
ourself if path resolution for a forwarded frame failed.
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
net/mac80211/mesh_hwmp.c | 5 +++--
net/mac80211/mesh_pathtbl.c | 6 ++++--
net/mac80211/rx.c | 8 +-------
3 files changed, 8 insertions(+), 11 deletions(-)
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index ce3db2735d7c3..1b13135d7f35d 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -1029,9 +1029,10 @@ int mesh_nexthop_lookup(struct sk_buff *skb,
PREQ_Q_F_START | PREQ_Q_F_REFRESH);
}
next_hop = rcu_dereference(mpath->next_hop);
- if (next_hop)
+ if (next_hop) {
memcpy(hdr->addr1, next_hop->sta.addr, ETH_ALEN);
- else
+ memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
+ } else
err = -ENOENT;
} else {
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 7bd2a76aef0ec..4c50d8ade04f7 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -221,6 +221,7 @@ void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta)
while ((skb = __skb_dequeue(&mpath->frame_queue)) != NULL) {
hdr = (struct ieee80211_hdr *) skb->data;
memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
+ memcpy(hdr->addr2, mpath->sdata->vif.addr, ETH_ALEN);
__skb_queue_tail(&tmpq, skb);
}
@@ -264,6 +265,7 @@ static void prepare_for_gate(struct sk_buff *skb, char *dst_addr,
next_hop = rcu_dereference(gate_mpath->next_hop)->sta.addr;
memcpy(hdr->addr1, next_hop, ETH_ALEN);
rcu_read_unlock();
+ memcpy(hdr->addr2, gate_mpath->sdata->vif.addr, ETH_ALEN);
memcpy(hdr->addr3, dst_addr, ETH_ALEN);
}
@@ -990,7 +992,7 @@ void mesh_path_discard_frame(struct sk_buff *skb,
u8 *ra, *da;
da = hdr->addr3;
- ra = hdr->addr1;
+ ra = hdr->addr2;
rcu_read_lock();
mpath = mesh_path_lookup(da, sdata);
if (mpath) {
@@ -999,7 +1001,7 @@ void mesh_path_discard_frame(struct sk_buff *skb,
spin_unlock_bh(&mpath->state_lock);
}
rcu_read_unlock();
- mesh_path_error_tx(sdata->u.mesh.mshcfg.element_ttl, skb->data,
+ mesh_path_error_tx(sdata->u.mesh.mshcfg.element_ttl, da,
cpu_to_le32(sn), reason, ra, sdata);
}
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 4eafbfd891d55..60798d6d53cf9 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1974,7 +1974,6 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
goto out;
fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data;
- memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
info = IEEE80211_SKB_CB(fwd_skb);
memset(info, 0, sizeof(*info));
info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
@@ -1983,14 +1982,9 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
if (is_multicast_ether_addr(fwd_hdr->addr1)) {
IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.mesh,
fwded_mcast);
+ memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
} else {
int err;
- /*
- * Save TA to addr1 to send TA a path error if a
- * suitable next hop is not found
- */
- memcpy(fwd_hdr->addr1, fwd_hdr->addr2,
- ETH_ALEN);
err = mesh_nexthop_lookup(fwd_skb, sdata);
/* Failed to immediately resolve next hop:
* fwded frame was dropped or will be added
--
2.30.2