73 lines
2.1 KiB
Diff
73 lines
2.1 KiB
Diff
From: Michael Braun <michael-dev@fami-braun.de>
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Date: Sat, 15 Oct 2016 13:28:19 +0200
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Subject: [PATCH] mac80211: fix A-MSDU outer SA/DA
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According to IEEE 802.11-2012 section 8.3.2 table 8-19, the outer SA/DA
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of A-MSDU frames need to be changed depending on FromDS/ToDS values.
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Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
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[use ether_addr_copy and add alignment annotations]
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Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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---
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--- a/include/net/mac80211.h
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+++ b/include/net/mac80211.h
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@@ -1438,7 +1438,7 @@ enum ieee80211_vif_flags {
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struct ieee80211_vif {
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enum nl80211_iftype type;
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struct ieee80211_bss_conf bss_conf;
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- u8 addr[ETH_ALEN];
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+ u8 addr[ETH_ALEN] __aligned(2);
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bool p2p;
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bool csa_active;
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bool mu_mimo_owner;
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--- a/net/mac80211/ieee80211_i.h
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+++ b/net/mac80211/ieee80211_i.h
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@@ -443,7 +443,7 @@ struct ieee80211_if_managed {
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struct ieee80211_mgd_auth_data *auth_data;
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struct ieee80211_mgd_assoc_data *assoc_data;
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- u8 bssid[ETH_ALEN];
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+ u8 bssid[ETH_ALEN] __aligned(2);
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u16 aid;
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--- a/net/mac80211/tx.c
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+++ b/net/mac80211/tx.c
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@@ -3074,6 +3074,7 @@ static bool ieee80211_amsdu_prepare_head
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int subframe_len = skb->len - hdr_len;
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void *data;
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u8 *qc, *h_80211_src, *h_80211_dst;
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+ const u8 *bssid;
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if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
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return false;
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@@ -3097,6 +3098,28 @@ static bool ieee80211_amsdu_prepare_head
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ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
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ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
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+ /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
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+ * fields needs to be changed to BSSID for A-MSDU frames depending
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+ * on FromDS/ToDS values.
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+ */
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+ switch (sdata->vif.type) {
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+ case NL80211_IFTYPE_STATION:
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+ bssid = sdata->u.mgd.bssid;
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+ break;
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+ case NL80211_IFTYPE_AP:
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+ case NL80211_IFTYPE_AP_VLAN:
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+ bssid = sdata->vif.addr;
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+ break;
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+ default:
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+ bssid = NULL;
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+ }
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+
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+ if (bssid && ieee80211_has_fromds(hdr->frame_control))
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+ ether_addr_copy(h_80211_src, bssid);
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+
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+ if (bssid && ieee80211_has_tods(hdr->frame_control))
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+ ether_addr_copy(h_80211_dst, bssid);
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+
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qc = ieee80211_get_qos_ctl(hdr);
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*qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
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