mac80211: mesh process the target only subfield for mesh hwmp
This patch does the following: - Remove unnecessary flags field used by PERR element - Use the per target flags defined in <linux/ieee80211.h> - Process the target only subfield based on case E2 of IEEE802.11-2012 13.10.9.3 Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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d51c2ea370
Коммит
932e628da2
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@ -19,15 +19,6 @@
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#define MAX_PREQ_QUEUE_LEN 64
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/* Destination only */
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#define MP_F_DO 0x1
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/* Reply and forward */
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#define MP_F_RF 0x2
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/* Unknown Sequence Number */
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#define MP_F_USN 0x01
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/* Reason code Present */
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#define MP_F_RCODE 0x02
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static void mesh_queue_preq(struct mesh_path *, u8);
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static inline u32 u32_field_get(const u8 *preq_elem, int offset, bool ae)
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@ -285,15 +276,10 @@ int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
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*pos++ = ttl;
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/* number of destinations */
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*pos++ = 1;
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/*
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* flags bit, bit 1 is unset if we know the sequence number and
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* bit 2 is set if we have a reason code
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/* Flags field has AE bit only as defined in
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* sec 8.4.2.117 IEEE802.11-2012
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*/
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*pos = 0;
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if (!target_sn)
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*pos |= MP_F_USN;
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if (target_rcode)
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*pos |= MP_F_RCODE;
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pos++;
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memcpy(pos, target, ETH_ALEN);
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pos += ETH_ALEN;
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@ -596,15 +582,13 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
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SN_LT(mpath->sn, target_sn)) {
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mpath->sn = target_sn;
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mpath->flags |= MESH_PATH_SN_VALID;
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} else if ((!(target_flags & MP_F_DO)) &&
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} else if ((!(target_flags & IEEE80211_PREQ_TO_FLAG)) &&
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(mpath->flags & MESH_PATH_ACTIVE)) {
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reply = true;
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target_metric = mpath->metric;
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target_sn = mpath->sn;
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if (target_flags & MP_F_RF)
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target_flags |= MP_F_DO;
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else
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forward = false;
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/* Case E2 of sec 13.10.9.3 IEEE 802.11-2012*/
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target_flags |= IEEE80211_PREQ_TO_FLAG;
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}
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}
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rcu_read_unlock();
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@ -1003,7 +987,7 @@ void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata)
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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struct mesh_preq_queue *preq_node;
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struct mesh_path *mpath;
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u8 ttl, target_flags;
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u8 ttl, target_flags = 0;
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const u8 *da;
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u32 lifetime;
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@ -1062,9 +1046,9 @@ void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata)
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}
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if (preq_node->flags & PREQ_Q_F_REFRESH)
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target_flags = MP_F_DO;
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target_flags |= IEEE80211_PREQ_TO_FLAG;
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else
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target_flags = MP_F_RF;
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target_flags &= ~IEEE80211_PREQ_TO_FLAG;
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spin_unlock_bh(&mpath->state_lock);
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da = (mpath->is_root) ? mpath->rann_snd_addr : broadcast_addr;
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