diff options
Diffstat (limited to 'net/mac80211/rx.c')
| -rw-r--r-- | net/mac80211/rx.c | 141 |
1 files changed, 124 insertions, 17 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 60d093f40f1d..dc27becb9b71 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -4,6 +4,7 @@ * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> * Copyright 2013-2014 Intel Mobile Communications GmbH + * Copyright(c) 2015 - 2016 Intel Deutschland GmbH * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -18,6 +19,7 @@ #include <linux/etherdevice.h> #include <linux/rcupdate.h> #include <linux/export.h> +#include <linux/bitops.h> #include <net/mac80211.h> #include <net/ieee80211_radiotap.h> #include <asm/unaligned.h> @@ -122,7 +124,8 @@ static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len, hdr = (void *)(skb->data + rtap_vendor_space); if (status->flag & (RX_FLAG_FAILED_FCS_CRC | - RX_FLAG_FAILED_PLCP_CRC)) + RX_FLAG_FAILED_PLCP_CRC | + RX_FLAG_ONLY_MONITOR)) return true; if (unlikely(skb->len < 16 + present_fcs_len + rtap_vendor_space)) @@ -507,7 +510,7 @@ ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, return NULL; } - if (!local->monitors) { + if (!local->monitors || (status->flag & RX_FLAG_SKIP_MONITOR)) { if (should_drop_frame(origskb, present_fcs_len, rtap_vendor_space)) { dev_kfree_skb(origskb); @@ -797,6 +800,26 @@ static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) return RX_CONTINUE; } +static inline bool ieee80211_rx_reorder_ready(struct tid_ampdu_rx *tid_agg_rx, + int index) +{ + struct sk_buff_head *frames = &tid_agg_rx->reorder_buf[index]; + struct sk_buff *tail = skb_peek_tail(frames); + struct ieee80211_rx_status *status; + + if (tid_agg_rx->reorder_buf_filtered & BIT_ULL(index)) + return true; + + if (!tail) + return false; + + status = IEEE80211_SKB_RXCB(tail); + if (status->flag & RX_FLAG_AMSDU_MORE) + return false; + + return true; +} + static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, struct tid_ampdu_rx *tid_agg_rx, int index, @@ -811,7 +834,7 @@ static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, if (skb_queue_empty(skb_list)) goto no_frame; - if (!ieee80211_rx_reorder_ready(skb_list)) { + if (!ieee80211_rx_reorder_ready(tid_agg_rx, index)) { __skb_queue_purge(skb_list); goto no_frame; } @@ -825,6 +848,7 @@ static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, } no_frame: + tid_agg_rx->reorder_buf_filtered &= ~BIT_ULL(index); tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); } @@ -865,7 +889,7 @@ static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, /* release the buffer until next missing frame */ index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; - if (!ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index]) && + if (!ieee80211_rx_reorder_ready(tid_agg_rx, index) && tid_agg_rx->stored_mpdu_num) { /* * No buffers ready to be released, but check whether any @@ -874,8 +898,7 @@ static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, int skipped = 1; for (j = (index + 1) % tid_agg_rx->buf_size; j != index; j = (j + 1) % tid_agg_rx->buf_size) { - if (!ieee80211_rx_reorder_ready( - &tid_agg_rx->reorder_buf[j])) { + if (!ieee80211_rx_reorder_ready(tid_agg_rx, j)) { skipped++; continue; } @@ -902,8 +925,7 @@ static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, skipped) & IEEE80211_SN_MASK; skipped = 0; } - } else while (ieee80211_rx_reorder_ready( - &tid_agg_rx->reorder_buf[index])) { + } else while (ieee80211_rx_reorder_ready(tid_agg_rx, index)) { ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, frames); index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; @@ -914,8 +936,7 @@ static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, for (; j != (index - 1) % tid_agg_rx->buf_size; j = (j + 1) % tid_agg_rx->buf_size) { - if (ieee80211_rx_reorder_ready( - &tid_agg_rx->reorder_buf[j])) + if (ieee80211_rx_reorder_ready(tid_agg_rx, j)) break; } @@ -986,7 +1007,7 @@ static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata index = mpdu_seq_num % tid_agg_rx->buf_size; /* check if we already stored this frame */ - if (ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index])) { + if (ieee80211_rx_reorder_ready(tid_agg_rx, index)) { dev_kfree_skb(skb); goto out; } @@ -1099,6 +1120,9 @@ ieee80211_rx_h_check_dup(struct ieee80211_rx_data *rx) struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); + if (status->flag & RX_FLAG_DUP_VALIDATED) + return RX_CONTINUE; + /* * Drop duplicate 802.11 retransmissions * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") @@ -2217,9 +2241,6 @@ ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) skb->dev = dev; __skb_queue_head_init(&frame_list); - if (skb_linearize(skb)) - return RX_DROP_UNUSABLE; - ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, rx->sdata->vif.type, rx->local->hw.extra_tx_headroom, true); @@ -2249,7 +2270,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) struct ieee80211_local *local = rx->local; struct ieee80211_sub_if_data *sdata = rx->sdata; struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; - u16 q, hdrlen; + u16 ac, q, hdrlen; hdr = (struct ieee80211_hdr *) skb->data; hdrlen = ieee80211_hdrlen(hdr->frame_control); @@ -2308,6 +2329,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) spin_lock_bh(&mppath->state_lock); if (!ether_addr_equal(mppath->mpp, mpp_addr)) memcpy(mppath->mpp, mpp_addr, ETH_ALEN); + mppath->exp_time = jiffies; spin_unlock_bh(&mppath->state_lock); } rcu_read_unlock(); @@ -2318,7 +2340,8 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) ether_addr_equal(sdata->vif.addr, hdr->addr3)) return RX_CONTINUE; - q = ieee80211_select_queue_80211(sdata, skb, hdr); + ac = ieee80211_select_queue_80211(sdata, skb, hdr); + q = sdata->vif.hw_queue[ac]; if (ieee80211_queue_stopped(&local->hw, q)) { IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); return RX_DROP_MONITOR; @@ -2756,6 +2779,11 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx) opmode, status->band); goto handled; } + case WLAN_VHT_ACTION_GROUPID_MGMT: { + if (len < IEEE80211_MIN_ACTION_SIZE + 25) + goto invalid; + goto queue; + } default: break; } @@ -3091,7 +3119,7 @@ static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, false); - skb_set_mac_header(skb, 0); + skb_reset_mac_header(skb); skb->ip_summed = CHECKSUM_UNNECESSARY; skb->pkt_type = PACKET_OTHERHOST; skb->protocol = htons(ETH_P_802_2); @@ -3293,6 +3321,85 @@ void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) ieee80211_rx_handlers(&rx, &frames); } +void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta *pubsta, u8 tid, + u16 ssn, u64 filtered, + u16 received_mpdus) +{ + struct sta_info *sta; + struct tid_ampdu_rx *tid_agg_rx; + struct sk_buff_head frames; + struct ieee80211_rx_data rx = { + /* This is OK -- must be QoS data frame */ + .security_idx = tid, + .seqno_idx = tid, + }; + int i, diff; + + if (WARN_ON(!pubsta || tid >= IEEE80211_NUM_TIDS)) + return; + + __skb_queue_head_init(&frames); + + sta = container_of(pubsta, struct sta_info, sta); + + rx.sta = sta; + rx.sdata = sta->sdata; + rx.local = sta->local; + + rcu_read_lock(); + tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); + if (!tid_agg_rx) + goto out; + + spin_lock_bh(&tid_agg_rx->reorder_lock); + + if (received_mpdus >= IEEE80211_SN_MODULO >> 1) { + int release; + + /* release all frames in the reorder buffer */ + release = (tid_agg_rx->head_seq_num + tid_agg_rx->buf_size) % + IEEE80211_SN_MODULO; + ieee80211_release_reorder_frames(sta->sdata, tid_agg_rx, + release, &frames); + /* update ssn to match received ssn */ + tid_agg_rx->head_seq_num = ssn; + } else { + ieee80211_release_reorder_frames(sta->sdata, tid_agg_rx, ssn, + &frames); + } + + /* handle the case that received ssn is behind the mac ssn. + * it can be tid_agg_rx->buf_size behind and still be valid */ + diff = (tid_agg_rx->head_seq_num - ssn) & IEEE80211_SN_MASK; + if (diff >= tid_agg_rx->buf_size) { + tid_agg_rx->reorder_buf_filtered = 0; + goto release; + } + filtered = filtered >> diff; + ssn += diff; + + /* update bitmap */ + for (i = 0; i < tid_agg_rx->buf_size; i++) { + int index = (ssn + i) % tid_agg_rx->buf_size; + + tid_agg_rx->reorder_buf_filtered &= ~BIT_ULL(index); + if (filtered & BIT_ULL(i)) + tid_agg_rx->reorder_buf_filtered |= BIT_ULL(index); + } + + /* now process also frames that the filter marking released */ + ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); + +release: + spin_unlock_bh(&tid_agg_rx->reorder_lock); + + ieee80211_rx_handlers(&rx, &frames); + + out: + rcu_read_unlock(); +} +EXPORT_SYMBOL(ieee80211_mark_rx_ba_filtered_frames); + /* main receive path */ static bool ieee80211_accept_frame(struct ieee80211_rx_data *rx) |