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wifi: mac80211: add support for SPP A-MSDUs

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If software crypto is used, simply add support for SPP A-MSDUs
(and use it whenever enabled as required by the cfg80211 API).

If hardware crypto is used, leave it up to the driver to set
the NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT flag and then check
sta->spp_amsdu or the IEEE80211_KEY_FLAG_SPP_AMSDU key flag.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Daniel Gabay <daniel.gabay@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240102213313.b8ada4514e2b.I1ac25d5f158165b5a88062a5a5e4c4fbeecf9a5d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2024-01-02 21:35:40 +02:00
parent 2518e89d5b
commit 3b220ed8b2
7 changed files with 44 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/net/mac80211.h
View File

@ -2081,6 +2081,8 @@ static inline bool lockdep_vif_wiphy_mutex_held(struct ieee80211_vif *vif)
* @IEEE80211_KEY_FLAG_GENERATE_MMIE: This flag should be set by the driver
* for a AES_CMAC key to indicate that it requires sequence number
* generation only
* @IEEE80211_KEY_FLAG_SPP_AMSDU: SPP A-MSDUs can be used with this key
* (set by mac80211 from the sta->spp_amsdu flag)
*/
enum ieee80211_key_flags {
IEEE80211_KEY_FLAG_GENERATE_IV_MGMT = BIT(0),
@ -2094,6 +2096,7 @@ enum ieee80211_key_flags {
IEEE80211_KEY_FLAG_PUT_MIC_SPACE = BIT(8),
IEEE80211_KEY_FLAG_NO_AUTO_TX = BIT(9),
IEEE80211_KEY_FLAG_GENERATE_MMIE = BIT(10),
IEEE80211_KEY_FLAG_SPP_AMSDU = BIT(11),
};
/**
@ -2392,6 +2395,7 @@ struct ieee80211_link_sta {
* would be assigned to link[link_id] where link_id is the id assigned
* by the AP.
* @valid_links: bitmap of valid links, or 0 for non-MLO
* @spp_amsdu: indicates whether the STA uses SPP A-MSDU or not.
*/
struct ieee80211_sta {
u8 addr[ETH_ALEN];
@ -2405,6 +2409,7 @@ struct ieee80211_sta {
bool tdls_initiator;
bool mfp;
bool mlo;
bool spp_amsdu;
u8 max_amsdu_subframes;
struct ieee80211_sta_aggregates *cur;

3
net/mac80211/cfg.c
View File

@ -1942,6 +1942,9 @@ static int sta_apply_parameters(struct ieee80211_local *local,
clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
}
if (mask & BIT(NL80211_STA_FLAG_SPP_AMSDU))
sta->sta.spp_amsdu = set & BIT(NL80211_STA_FLAG_SPP_AMSDU);
/* mark TDLS channel switch support, if the AP allows it */
if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
!sdata->deflink.u.mgd.tdls_chan_switch_prohibited &&

1
net/mac80211/ieee80211_i.h
View File

@ -441,6 +441,7 @@ struct ieee80211_mgd_assoc_data {
bool timeout_started;
bool comeback; /* whether the AP has requested association comeback */
bool s1g;
bool spp_amsdu;
unsigned int assoc_link_id;

4
net/mac80211/key.c
View File

@ -925,6 +925,10 @@ int ieee80211_key_link(struct ieee80211_key *key,
*/
key->color = atomic_inc_return(&key_color);
/* keep this flag for easier access later */
if (sta && sta->sta.spp_amsdu)
key->conf.flags |= IEEE80211_KEY_FLAG_SPP_AMSDU;
increment_tailroom_need_count(sdata);
ret = ieee80211_key_replace(sdata, link, sta, pairwise, old_key, key);

5
net/mac80211/main.c
View File

@ -735,8 +735,11 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
}
if (!ops->set_key)
if (!ops->set_key) {
wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
wiphy_ext_feature_set(wiphy,
NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT);
}
wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);

4
net/mac80211/mlme.c
View File

@ -5132,6 +5132,8 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
if (WARN_ON(!sta))
goto out_err;
sta->sta.spp_amsdu = assoc_data->spp_amsdu;
if (ieee80211_vif_is_mld(&sdata->vif)) {
for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
if (!assoc_data->link[link_id].bss)
@ -8216,6 +8218,8 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
assoc_data->wmm = bss->wmm_used &&
(local->hw.queues >= IEEE80211_NUM_ACS);
assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU;
/*
* IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
* We still associate in non-HT mode (11a/b/g) if any one of these

33
net/mac80211/wpa.c
View File

@ -315,7 +315,7 @@ ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx)
* Calculate AAD for CCMP/GCMP, returning qos_tid since we
* need that in CCMP also for b_0.
*/
static u8 ccmp_gcmp_aad(struct sk_buff *skb, u8 *aad)
static u8 ccmp_gcmp_aad(struct sk_buff *skb, u8 *aad, bool spp_amsdu)
{
struct ieee80211_hdr *hdr = (void *)skb->data;
__le16 mask_fc;
@ -340,7 +340,14 @@ static u8 ccmp_gcmp_aad(struct sk_buff *skb, u8 *aad)
len_a += 6;
if (ieee80211_is_data_qos(hdr->frame_control)) {
qos_tid = ieee80211_get_tid(hdr);
qos_tid = *ieee80211_get_qos_ctl(hdr);
if (spp_amsdu)
qos_tid &= IEEE80211_QOS_CTL_TID_MASK |
IEEE80211_QOS_CTL_A_MSDU_PRESENT;
else
qos_tid &= IEEE80211_QOS_CTL_TID_MASK;
mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_ORDER);
len_a += 2;
} else {
@ -369,10 +376,11 @@ static u8 ccmp_gcmp_aad(struct sk_buff *skb, u8 *aad)
return qos_tid;
}
static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *b_0, u8 *aad)
static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *b_0, u8 *aad,
bool spp_amsdu)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
u8 qos_tid = ccmp_gcmp_aad(skb, aad);
u8 qos_tid = ccmp_gcmp_aad(skb, aad, spp_amsdu);
/* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC
* mode authentication are not allowed to collide, yet both are derived
@ -479,7 +487,8 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb,
return 0;
pos += IEEE80211_CCMP_HDR_LEN;
ccmp_special_blocks(skb, pn, b_0, aad);
ccmp_special_blocks(skb, pn, b_0, aad,
key->conf.flags & IEEE80211_KEY_FLAG_SPP_AMSDU);
return ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, b_0, aad, pos, len,
skb_put(skb, mic_len));
}
@ -557,7 +566,8 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx,
u8 aad[2 * AES_BLOCK_SIZE];
u8 b_0[AES_BLOCK_SIZE];
/* hardware didn't decrypt/verify MIC */
ccmp_special_blocks(skb, pn, b_0, aad);
ccmp_special_blocks(skb, pn, b_0, aad,
key->conf.flags & IEEE80211_KEY_FLAG_SPP_AMSDU);
if (ieee80211_aes_ccm_decrypt(
key->u.ccmp.tfm, b_0, aad,
@ -581,7 +591,8 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx,
return RX_CONTINUE;
}
static void gcmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *j_0, u8 *aad)
static void gcmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *j_0, u8 *aad,
bool spp_amsdu)
{
struct ieee80211_hdr *hdr = (void *)skb->data;
@ -591,7 +602,7 @@ static void gcmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *j_0, u8 *aad)
j_0[14] = 0;
j_0[AES_BLOCK_SIZE - 1] = 0x01;
ccmp_gcmp_aad(skb, aad);
ccmp_gcmp_aad(skb, aad, spp_amsdu);
}
static inline void gcmp_pn2hdr(u8 *hdr, const u8 *pn, int key_id)
@ -680,7 +691,8 @@ static int gcmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
return 0;
pos += IEEE80211_GCMP_HDR_LEN;
gcmp_special_blocks(skb, pn, j_0, aad);
gcmp_special_blocks(skb, pn, j_0, aad,
key->conf.flags & IEEE80211_KEY_FLAG_SPP_AMSDU);
return ieee80211_aes_gcm_encrypt(key->u.gcmp.tfm, j_0, aad, pos, len,
skb_put(skb, IEEE80211_GCMP_MIC_LEN));
}
@ -753,7 +765,8 @@ ieee80211_crypto_gcmp_decrypt(struct ieee80211_rx_data *rx)
u8 aad[2 * AES_BLOCK_SIZE];
u8 j_0[AES_BLOCK_SIZE];
/* hardware didn't decrypt/verify MIC */
gcmp_special_blocks(skb, pn, j_0, aad);
gcmp_special_blocks(skb, pn, j_0, aad,
key->conf.flags & IEEE80211_KEY_FLAG_SPP_AMSDU);
if (ieee80211_aes_gcm_decrypt(
key->u.gcmp.tfm, j_0, aad,