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openwrt/package/kernel/mac80211/patches/304-mac80211-add-hdrlen-to-ieee80211_tx_data.patch
Felix Fietkau ad51e09fd1 mac80211: update to wireless-testing 2016-10-08 
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2016-10-13 17:06:03 +02:00

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From: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Date: Fri, 19 Feb 2016 11:01:49 +0100
Subject: [PATCH] mac80211: add hdrlen to ieee80211_tx_data
Add hdrlen to ieee80211_tx_data and use this
when wep/ccmd/tkip. This is preparation for
aligned4 code.
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
---
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -175,6 +175,7 @@ struct ieee80211_tx_data {
struct ieee80211_tx_rate rate;
unsigned int flags;
+ unsigned int hdrlen;
};
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -955,7 +955,7 @@ ieee80211_tx_h_fragment(struct ieee80211
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr = (void *)skb->data;
int frag_threshold = tx->local->hw.wiphy->frag_threshold;
- int hdrlen;
+ int hdrlen = tx->hdrlen;
int fragnum;
/* no matter what happens, tx->skb moves to tx->skbs */
@@ -976,8 +976,6 @@ ieee80211_tx_h_fragment(struct ieee80211
if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
return TX_DROP;
- hdrlen = ieee80211_hdrlen(hdr->frame_control);
-
/* internal error, why isn't DONTFRAG set? */
if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
return TX_DROP;
@@ -1209,6 +1207,8 @@ ieee80211_tx_prepare(struct ieee80211_su
hdr = (struct ieee80211_hdr *) skb->data;
+ tx->hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
if (likely(sta)) {
if (!IS_ERR(sta))
tx->sta = sta;
@@ -3414,6 +3414,7 @@ begin:
tx.local = local;
tx.skb = skb;
tx.sdata = vif_to_sdata(info->control.vif);
+ tx.hdrlen = ieee80211_padded_hdrlen(hw, hdr->frame_control);
if (txq->sta)
tx.sta = container_of(txq->sta, struct sta_info, sta);
@@ -3584,6 +3585,7 @@ ieee80211_build_data_template(struct iee
hdr = (void *)skb->data;
tx.sta = sta_info_get(sdata, hdr->addr1);
tx.skb = skb;
+ tx.hdrlen = ieee80211_padded_hdrlen(&tx.local->hw, hdr->frame_control);
if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
rcu_read_unlock();
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1227,6 +1227,7 @@ void ieee80211_send_auth(struct ieee8021
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb;
struct ieee80211_mgmt *mgmt;
+ unsigned int hdrlen;
int err;
/* 24 + 6 = header + auth_algo + auth_transaction + status_code */
@@ -1251,8 +1252,10 @@ void ieee80211_send_auth(struct ieee8021
memcpy(skb_put(skb, extra_len), extra, extra_len);
if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
+ hdrlen = ieee80211_hdrlen(mgmt->frame_control);
mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
- err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
+ err = ieee80211_wep_encrypt(local, skb, hdrlen, key,
+ key_len, key_idx);
WARN_ON(err);
}
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -89,11 +89,11 @@ static void ieee80211_wep_get_iv(struct
static u8 *ieee80211_wep_add_iv(struct ieee80211_local *local,
struct sk_buff *skb,
+ unsigned int hdrlen,
int keylen, int keyidx)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- unsigned int hdrlen;
u8 *newhdr;
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
@@ -101,7 +101,6 @@ static u8 *ieee80211_wep_add_iv(struct i
if (WARN_ON(skb_headroom(skb) < IEEE80211_WEP_IV_LEN))
return NULL;
- hdrlen = ieee80211_hdrlen(hdr->frame_control);
newhdr = skb_push(skb, IEEE80211_WEP_IV_LEN);
memmove(newhdr, newhdr + IEEE80211_WEP_IV_LEN, hdrlen);
@@ -160,6 +159,7 @@ int ieee80211_wep_encrypt_data(struct cr
*/
int ieee80211_wep_encrypt(struct ieee80211_local *local,
struct sk_buff *skb,
+ unsigned int hdrlen,
const u8 *key, int keylen, int keyidx)
{
u8 *iv;
@@ -169,7 +169,7 @@ int ieee80211_wep_encrypt(struct ieee802
if (WARN_ON(skb_tailroom(skb) < IEEE80211_WEP_ICV_LEN))
return -1;
- iv = ieee80211_wep_add_iv(local, skb, keylen, keyidx);
+ iv = ieee80211_wep_add_iv(local, skb, hdrlen, keylen, keyidx);
if (!iv)
return -1;
@@ -306,13 +306,14 @@ static int wep_encrypt_skb(struct ieee80
struct ieee80211_key_conf *hw_key = info->control.hw_key;
if (!hw_key) {
- if (ieee80211_wep_encrypt(tx->local, skb, tx->key->conf.key,
+ if (ieee80211_wep_encrypt(tx->local, skb, tx->hdrlen,
+ tx->key->conf.key,
tx->key->conf.keylen,
tx->key->conf.keyidx))
return -1;
} else if ((hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
(hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
- if (!ieee80211_wep_add_iv(tx->local, skb,
+ if (!ieee80211_wep_add_iv(tx->local, skb, tx->hdrlen,
tx->key->conf.keylen,
tx->key->conf.keyidx))
return -1;
--- a/net/mac80211/wep.h
+++ b/net/mac80211/wep.h
@@ -22,6 +22,7 @@ int ieee80211_wep_encrypt_data(struct cr
size_t klen, u8 *data, size_t data_len);
int ieee80211_wep_encrypt(struct ieee80211_local *local,
struct sk_buff *skb,
+ unsigned int hdrlen,
const u8 *key, int keylen, int keyidx);
int ieee80211_wep_decrypt_data(struct crypto_cipher *tfm, u8 *rc4key,
size_t klen, u8 *data, size_t data_len);
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -43,7 +43,7 @@ ieee80211_tx_h_michael_mic_add(struct ie
skb->len < 24 || !ieee80211_is_data_present(hdr->frame_control))
return TX_CONTINUE;
- hdrlen = ieee80211_hdrlen(hdr->frame_control);
+ hdrlen = tx->hdrlen;
if (skb->len < hdrlen)
return TX_DROP;
@@ -186,7 +186,6 @@ mic_fail_no_key:
static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct ieee80211_key *key = tx->key;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
unsigned int hdrlen;
@@ -201,7 +200,7 @@ static int tkip_encrypt_skb(struct ieee8
return 0;
}
- hdrlen = ieee80211_hdrlen(hdr->frame_control);
+ hdrlen = tx->hdrlen;
len = skb->len - hdrlen;
if (info->control.hw_key)
@@ -418,7 +417,7 @@ static int ccmp_encrypt_skb(struct ieee8
return 0;
}
- hdrlen = ieee80211_hdrlen(hdr->frame_control);
+ hdrlen = tx->hdrlen;
len = skb->len - hdrlen;
if (info->control.hw_key)
@@ -651,7 +650,7 @@ static int gcmp_encrypt_skb(struct ieee8
return 0;
}
- hdrlen = ieee80211_hdrlen(hdr->frame_control);
+ hdrlen = tx->hdrlen;
len = skb->len - hdrlen;
if (info->control.hw_key)
@@ -791,7 +790,6 @@ static ieee80211_tx_result
ieee80211_crypto_cs_encrypt(struct ieee80211_tx_data *tx,
struct sk_buff *skb)
{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_key *key = tx->key;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
int hdrlen;
@@ -807,8 +805,7 @@ ieee80211_crypto_cs_encrypt(struct ieee8
pskb_expand_head(skb, iv_len, 0, GFP_ATOMIC)))
return TX_DROP;
- hdrlen = ieee80211_hdrlen(hdr->frame_control);
-
+ hdrlen = tx->hdrlen;
pos = skb_push(skb, iv_len);
memmove(pos, pos + iv_len, hdrlen);
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