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mac80211: fix switched HWMP frame addresses 

HWMP originator and target addresses were switched on the air but also
on reception, which is why path selection still worked.

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 17:15:22 -08:00 коммит произвёл John W. Linville
Родитель 7e3c88660b
Коммит 3c26f1f68e
1 изменённых файлов: 11 добавлений и 19 удалений
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30
net/mac80211/mesh_hwmp.c
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@ -393,15 +393,13 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
orig_metric = PREQ_IE_METRIC(hwmp_ie);
break;
case MPATH_PREP:
/* Originator here refers to the MP that was the destination in
* the Path Request. The draft refers to that MP as the
* destination address, even though usually it is the origin of
* the PREP frame. We divert from the nomenclature in the draft
/* Originator here refers to the MP that was the target in the
* Path Request. We divert from the nomenclature in the draft
* so that we can easily use a single function to gather path
* information from both PREQ and PREP frames.
*/
orig_addr = PREP_IE_ORIG_ADDR(hwmp_ie);
orig_sn = PREP_IE_ORIG_SN(hwmp_ie);
orig_addr = PREP_IE_TARGET_ADDR(hwmp_ie);
orig_sn = PREP_IE_TARGET_SN(hwmp_ie);
orig_lifetime = PREP_IE_LIFETIME(hwmp_ie);
orig_metric = PREP_IE_METRIC(hwmp_ie);
break;
@ -562,9 +560,9 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
ttl = ifmsh->mshcfg.element_ttl;
if (ttl != 0) {
mhwmp_dbg("replying to the PREQ");
mesh_path_sel_frame_tx(MPATH_PREP, 0, target_addr,
cpu_to_le32(target_sn), 0, orig_addr,
cpu_to_le32(orig_sn), mgmt->sa, 0, ttl,
mesh_path_sel_frame_tx(MPATH_PREP, 0, orig_addr,
cpu_to_le32(orig_sn), 0, target_addr,
cpu_to_le32(target_sn), mgmt->sa, 0, ttl,
cpu_to_le32(lifetime), cpu_to_le32(metric),
0, sdata);
} else
@ -618,14 +616,8 @@ static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
mhwmp_dbg("received PREP from %pM", PREP_IE_ORIG_ADDR(prep_elem));
/* Note that we divert from the draft nomenclature and denominate
* destination to what the draft refers to as origininator. So in this
* function destnation refers to the final destination of the PREP,
* which corresponds with the originator of the PREQ which this PREP
* replies
*/
target_addr = PREP_IE_TARGET_ADDR(prep_elem);
if (memcmp(target_addr, sdata->vif.addr, ETH_ALEN) == 0)
orig_addr = PREP_IE_ORIG_ADDR(prep_elem);
if (memcmp(orig_addr, sdata->vif.addr, ETH_ALEN) == 0)
/* destination, no forwarding required */
return;
@ -636,7 +628,7 @@ static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
}
rcu_read_lock();
mpath = mesh_path_lookup(target_addr, sdata);
mpath = mesh_path_lookup(orig_addr, sdata);
if (mpath)
spin_lock_bh(&mpath->state_lock);
else
@ -651,7 +643,7 @@ static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
flags = PREP_IE_FLAGS(prep_elem);
lifetime = PREP_IE_LIFETIME(prep_elem);
hopcount = PREP_IE_HOPCOUNT(prep_elem) + 1;
orig_addr = PREP_IE_ORIG_ADDR(prep_elem);
target_addr = PREP_IE_TARGET_ADDR(prep_elem);
target_sn = PREP_IE_TARGET_SN(prep_elem);
orig_sn = PREP_IE_ORIG_SN(prep_elem);