From ebceec860fc370b2f4c23e95c51daa932e047913 Mon Sep 17 00:00:00 2001 From: Michael Braun Date: Tue, 22 Nov 2016 11:52:18 +0100 Subject: mac80211: multicast to unicast conversion Add the ability for an AP (and associated VLANs) to perform multicast-to-unicast conversion for ARP, IPv4 and IPv6 frames (possibly within 802.1Q). If enabled, such frames are to be sent to each station separately, with the DA replaced by their own MAC address rather than the group address. Note that this may break certain expectations of the receiver, such as the ability to drop unicast IP packets received within multicast L2 frames, or the ability to not send ICMP destination unreachable messages for packets received in L2 multicast (which is required, but the receiver can't tell the difference if this new option is enabled.) This also doesn't implement the 802.11 DMS (directed multicast service). Signed-off-by: Michael Braun [use true/false, rename label to the correct "multicast", use __be16 for ethertype and network order for constants] Signed-off-by: Johannes Berg --- net/mac80211/ieee80211_i.h | 1 + 1 file changed, 1 insertion(+) (limited to 'net/mac80211/ieee80211_i.h') diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index d37a577f63a1..a3af14e3e64d 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -297,6 +297,7 @@ struct ieee80211_if_ap { driver_smps_mode; /* smps mode request */ struct work_struct request_smps_work; + bool multicast_to_unicast; }; struct ieee80211_if_wds { -- cgit v1.2.3 From 76f43b4c0a9337af22827d78de4f2b8fd5328489 Mon Sep 17 00:00:00 2001 From: Masashi Honma Date: Thu, 8 Dec 2016 10:15:50 +0900 Subject: mac80211: Remove invalid flag operations in mesh TSF synchronization mesh_sync_offset_adjust_tbtt() implements Extensible synchronization framework ([1] 13.13.2 Extensible synchronization framework). It shall not operate the flag "TBTT Adjusting subfield" ([1] 8.4.2.100.8 Mesh Capability), since it is used only for MBCA ([1] 13.13.4 Mesh beacon collision avoidance, see 13.13.4.4.3 TBTT scanning and adjustment procedures for detail). So this patch remove the flag operations. [1] IEEE Std 802.11 2012 Signed-off-by: Masashi Honma [remove adjusting_tbtt entirely, since it's now unused] Signed-off-by: Johannes Berg --- net/mac80211/ieee80211_i.h | 1 - net/mac80211/mesh.c | 3 --- net/mac80211/mesh_sync.c | 11 ----------- 3 files changed, 15 deletions(-) (limited to 'net/mac80211/ieee80211_i.h') diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index a3af14e3e64d..03e3230479f3 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -689,7 +689,6 @@ struct ieee80211_if_mesh { const struct ieee80211_mesh_sync_ops *sync_ops; s64 sync_offset_clockdrift_max; spinlock_t sync_offset_lock; - bool adjusting_tbtt; /* mesh power save */ enum nl80211_mesh_power_mode nonpeer_pm; int ps_peers_light_sleep; diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c index 42120d965263..b9628374dcbd 100644 --- a/net/mac80211/mesh.c +++ b/net/mac80211/mesh.c @@ -279,8 +279,6 @@ int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ *pos |= ifmsh->ps_peers_deep_sleep ? IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; - *pos++ |= ifmsh->adjusting_tbtt ? - IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00; *pos++ = 0x00; return 0; @@ -850,7 +848,6 @@ int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) ifmsh->mesh_cc_id = 0; /* Disabled */ /* register sync ops from extensible synchronization framework */ ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); - ifmsh->adjusting_tbtt = false; ifmsh->sync_offset_clockdrift_max = 0; set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); ieee80211_mesh_root_setup(ifmsh); diff --git a/net/mac80211/mesh_sync.c b/net/mac80211/mesh_sync.c index faca22cd02b5..75608c07dc7b 100644 --- a/net/mac80211/mesh_sync.c +++ b/net/mac80211/mesh_sync.c @@ -123,7 +123,6 @@ static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, */ if (elems->mesh_config && mesh_peer_tbtt_adjusting(elems)) { - clear_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN); msync_dbg(sdata, "STA %pM : is adjusting TBTT\n", sta->sta.addr); goto no_sync; @@ -172,11 +171,9 @@ static void mesh_sync_offset_adjust_tbtt(struct ieee80211_sub_if_data *sdata, struct beacon_data *beacon) { struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; - u8 cap; WARN_ON(ifmsh->mesh_sp_id != IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET); WARN_ON(!rcu_read_lock_held()); - cap = beacon->meshconf->meshconf_cap; spin_lock_bh(&ifmsh->sync_offset_lock); @@ -190,21 +187,13 @@ static void mesh_sync_offset_adjust_tbtt(struct ieee80211_sub_if_data *sdata, "TBTT : kicking off TBTT adjustment with clockdrift_max=%lld\n", ifmsh->sync_offset_clockdrift_max); set_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags); - - ifmsh->adjusting_tbtt = true; } else { msync_dbg(sdata, "TBTT : max clockdrift=%lld; too small to adjust\n", (long long)ifmsh->sync_offset_clockdrift_max); ifmsh->sync_offset_clockdrift_max = 0; - - ifmsh->adjusting_tbtt = false; } spin_unlock_bh(&ifmsh->sync_offset_lock); - - beacon->meshconf->meshconf_cap = ifmsh->adjusting_tbtt ? - IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING | cap : - ~IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING & cap; } static const struct sync_method sync_methods[] = { -- cgit v1.2.3 From 445cd452fe5187e676eef02c917c9e5f837c749e Mon Sep 17 00:00:00 2001 From: Masashi Honma Date: Thu, 8 Dec 2016 10:15:51 +0900 Subject: mac80211: Use appropriate name for functions and messages These functions drifts TSF timers, not TBTT. Signed-off-by: Masashi Honma Signed-off-by: Johannes Berg --- net/mac80211/ieee80211_i.h | 4 ++-- net/mac80211/mesh.c | 2 +- net/mac80211/mesh.h | 2 +- net/mac80211/mesh_sync.c | 16 ++++++++-------- net/mac80211/tx.c | 2 +- 5 files changed, 13 insertions(+), 13 deletions(-) (limited to 'net/mac80211/ieee80211_i.h') diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 03e3230479f3..e5d73118d08f 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -625,8 +625,8 @@ struct ieee80211_mesh_sync_ops { struct ieee80211_rx_status *rx_status); /* should be called with beacon_data under RCU read lock */ - void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata, - struct beacon_data *beacon); + void (*adjust_tsf)(struct ieee80211_sub_if_data *sdata, + struct beacon_data *beacon); /* add other framework functions here */ }; diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c index b9628374dcbd..cc2a63bd233f 100644 --- a/net/mac80211/mesh.c +++ b/net/mac80211/mesh.c @@ -1346,7 +1346,7 @@ void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) ieee80211_mesh_rootpath(sdata); if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) - mesh_sync_adjust_tbtt(sdata); + mesh_sync_adjust_tsf(sdata); if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) mesh_bss_info_changed(sdata); diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h index 26b9ccbe1fce..7e5f271e3c30 100644 --- a/net/mac80211/mesh.h +++ b/net/mac80211/mesh.h @@ -341,7 +341,7 @@ static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata) } void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata); -void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata); +void mesh_sync_adjust_tsf(struct ieee80211_sub_if_data *sdata); void ieee80211s_stop(void); #else static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata) diff --git a/net/mac80211/mesh_sync.c b/net/mac80211/mesh_sync.c index 75608c07dc7b..a435f094a82e 100644 --- a/net/mac80211/mesh_sync.c +++ b/net/mac80211/mesh_sync.c @@ -12,7 +12,7 @@ #include "mesh.h" #include "driver-ops.h" -/* This is not in the standard. It represents a tolerable tbtt drift below +/* This is not in the standard. It represents a tolerable tsf drift below * which we do no TSF adjustment. */ #define TOFFSET_MINIMUM_ADJUSTMENT 10 @@ -46,7 +46,7 @@ static bool mesh_peer_tbtt_adjusting(struct ieee802_11_elems *ie) IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING) != 0; } -void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata) +void mesh_sync_adjust_tsf(struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; @@ -57,12 +57,12 @@ void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata) spin_lock_bh(&ifmsh->sync_offset_lock); if (ifmsh->sync_offset_clockdrift_max < beacon_int_fraction) { - msync_dbg(sdata, "TBTT : max clockdrift=%lld; adjusting\n", + msync_dbg(sdata, "TSF : max clockdrift=%lld; adjusting\n", (long long) ifmsh->sync_offset_clockdrift_max); tsfdelta = -ifmsh->sync_offset_clockdrift_max; ifmsh->sync_offset_clockdrift_max = 0; } else { - msync_dbg(sdata, "TBTT : max clockdrift=%lld; adjusting by %llu\n", + msync_dbg(sdata, "TSF : max clockdrift=%lld; adjusting by %llu\n", (long long) ifmsh->sync_offset_clockdrift_max, (unsigned long long) beacon_int_fraction); tsfdelta = -beacon_int_fraction; @@ -167,7 +167,7 @@ no_sync: rcu_read_unlock(); } -static void mesh_sync_offset_adjust_tbtt(struct ieee80211_sub_if_data *sdata, +static void mesh_sync_offset_adjust_tsf(struct ieee80211_sub_if_data *sdata, struct beacon_data *beacon) { struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; @@ -184,12 +184,12 @@ static void mesh_sync_offset_adjust_tbtt(struct ieee80211_sub_if_data *sdata, * the tsf adjustment to the mesh tasklet */ msync_dbg(sdata, - "TBTT : kicking off TBTT adjustment with clockdrift_max=%lld\n", + "TSF : kicking off TSF adjustment with clockdrift_max=%lld\n", ifmsh->sync_offset_clockdrift_max); set_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags); } else { msync_dbg(sdata, - "TBTT : max clockdrift=%lld; too small to adjust\n", + "TSF : max clockdrift=%lld; too small to adjust\n", (long long)ifmsh->sync_offset_clockdrift_max); ifmsh->sync_offset_clockdrift_max = 0; } @@ -201,7 +201,7 @@ static const struct sync_method sync_methods[] = { .method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET, .ops = { .rx_bcn_presp = &mesh_sync_offset_rx_bcn_presp, - .adjust_tbtt = &mesh_sync_offset_adjust_tbtt, + .adjust_tsf = &mesh_sync_offset_adjust_tsf, } }, }; diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index a39c0f07021b..058652d000d9 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -4196,7 +4196,7 @@ __ieee80211_beacon_get(struct ieee80211_hw *hw, } if (ifmsh->sync_ops) - ifmsh->sync_ops->adjust_tbtt(sdata, beacon); + ifmsh->sync_ops->adjust_tsf(sdata, beacon); skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + -- cgit v1.2.3