path: root/net/mac80211/mesh_hwmp.c
diff options
authorMarco Porsch <>2013-01-30 18:14:08 +0100
committerJohannes Berg <>2013-02-04 18:57:47 +0100
commit3f52b7e328c526fa7a592af9bf5772c591ed38a4 (patch)
tree1bcf93b87c99c3be6c9020a41b28114130f4c251 /net/mac80211/mesh_hwmp.c
parent0532d4f154b87da6361ab90d12f35142d5119dc1 (diff)
mac80211: mesh power save basics
Add routines to - maintain a PS mode for each peer and a non-peer PS mode - indicate own PS mode in transmitted frames - track neighbor STAs power modes - buffer frames when neighbors are in PS mode - add TIM and Awake Window IE to beacons - release frames in Mesh Peer Service Periods Add local_pm to sta_info to represent the link-specific power mode at this station towards the remote station. When a peer link is established, use the default power mode stored in mesh config. Update the PS status if the peering status of a neighbor changes. Maintain a mesh power mode for non-peer mesh STAs. Set the non-peer power mode to active mode during peering. Authenticated mesh peering is currently not working when either node is configured to be in power save mode. Indicate the current power mode in transmitted frames. Use QoS Nulls to indicate mesh power mode transitions. For performance reasons, calls to the function setting the frame flags are placed in HWMP routing routines, as there the STA pointer is already available. Add peer_pm to sta_info to represent the peer's link-specific power mode towards the local station. Add nonpeer_pm to represent the peer's power mode towards all non-peer stations. Track power modes based on received frames. Add the ps_data structure to ieee80211_if_mesh (for TIM map, PS neighbor counter and group-addressed frame buffer). Set WLAN_STA_PS flag for STA in PS mode to use the unicast frame buffering routines in the tx path. Update num_sta_ps to buffer and release group-addressed frames after DTIM beacons. Announce the awake window duration in beacons if in light or deep sleep mode towards any peer or non-peer. Create a TIM IE similarly to AP mode and add it to mesh beacons. Parse received Awake Window IEs and check TIM IEs for buffered frames. Release frames towards peers in mesh Peer Service Periods. Use the corresponding trigger frames and monitor the MPSP status. Append a QoS Null as trigger frame if neccessary to properly end the MPSP. Currently, in HT channels MPSPs behave imperfectly and show large delay spikes and frame losses. Signed-off-by: Marco Porsch <> Signed-off-by: Ivan Bezyazychnyy <> Signed-off-by: Mike Krinkin <> Signed-off-by: Max Filippov <> Signed-off-by: Johannes Berg <>
Diffstat (limited to 'net/mac80211/mesh_hwmp.c')
1 files changed, 7 insertions, 0 deletions
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 6b4603a90031..f0dd8742ed42 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -205,6 +205,7 @@ static void prepare_frame_for_deferred_tx(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb)
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
skb_set_mac_header(skb, 0);
skb_set_network_header(skb, 0);
@@ -217,6 +218,7 @@ static void prepare_frame_for_deferred_tx(struct ieee80211_sub_if_data *sdata,
info->control.vif = &sdata->vif;
ieee80211_set_qos_hdr(sdata, skb);
+ ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
@@ -1080,6 +1082,10 @@ int mesh_nexthop_resolve(struct sk_buff *skb,
u8 *target_addr = hdr->addr3;
int err = 0;
+ /* Nulls are only sent to peers for PS and should be pre-addressed */
+ if (ieee80211_is_qos_nullfunc(hdr->frame_control))
+ return 0;
err = mesh_nexthop_lookup(skb, sdata);
if (!err)
@@ -1151,6 +1157,7 @@ int mesh_nexthop_lookup(struct sk_buff *skb,
if (next_hop) {
memcpy(hdr->addr1, next_hop->sta.addr, ETH_ALEN);
memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
+ ieee80211_mps_set_frame_flags(sdata, next_hop, hdr);
err = 0;