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Commit a7767f95 authored by Harvey Harrison's avatar Harvey Harrison Committed by John W. Linville
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mac80211: remove trivial rx_data->fc users 

Signed-off-by: default avatarHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent fc32f924
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Showing with 51 additions and 56 deletions
net/mac80211/rx.c
View file @ a7767f95
......@@ -352,9 +352,10 @@ static void ieee80211_parse_qos(struct ieee80211_rx_data *rx)
static void ieee80211_verify_ip_alignment(struct ieee80211_rx_data *rx)
{
#ifdef CONFIG_MAC80211_DEBUG_PACKET_ALIGNMENT
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
int hdrlen;
if (!WLAN_FC_DATA_PRESENT(rx->fc))
if (!ieee80211_is_data_present(hdr->frame_control))
return;
/*
......@@ -376,7 +377,7 @@ static void ieee80211_verify_ip_alignment(struct ieee80211_rx_data *rx)
* header and the payload is not supported, the driver is required
* to move the 802.11 header further back in that case.
*/
hdrlen = ieee80211_get_hdrlen(rx->fc);
hdrlen = ieee80211_hdrlen(hdr->frame_control);
if (rx->flags & IEEE80211_RX_AMSDU)
hdrlen += ETH_HLEN;
WARN_ON_ONCE(((unsigned long)(rx->skb->data + hdrlen)) & 3);
......@@ -415,14 +416,11 @@ ieee80211_rx_h_passive_scan(struct ieee80211_rx_data *rx)
static ieee80211_rx_result
ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
{
int hdrlen = ieee80211_get_hdrlen(rx->fc);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
#define msh_h_get(h, l) ((struct ieee80211s_hdr *) ((u8 *)h + l))
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) {
if (!((rx->fc & IEEE80211_FCTL_FROMDS) &&
(rx->fc & IEEE80211_FCTL_TODS)))
if (ieee80211_is_data(hdr->frame_control)) {
if (!ieee80211_has_a4(hdr->frame_control))
return RX_DROP_MONITOR;
if (memcmp(hdr->addr4, rx->dev->dev_addr, ETH_ALEN) == 0)
return RX_DROP_MONITOR;
......@@ -435,27 +433,30 @@ ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
if (!rx->sta || sta_plink_state(rx->sta) != PLINK_ESTAB) {
struct ieee80211_mgmt *mgmt;
if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)
if (!ieee80211_is_mgmt(hdr->frame_control))
return RX_DROP_MONITOR;
switch (rx->fc & IEEE80211_FCTL_STYPE) {
case IEEE80211_STYPE_ACTION:
if (ieee80211_is_action(hdr->frame_control)) {
mgmt = (struct ieee80211_mgmt *)hdr;
if (mgmt->u.action.category != PLINK_CATEGORY)
return RX_DROP_MONITOR;
/* fall through on else */
case IEEE80211_STYPE_PROBE_REQ:
case IEEE80211_STYPE_PROBE_RESP:
case IEEE80211_STYPE_BEACON:
return RX_CONTINUE;
break;
default:
return RX_DROP_MONITOR;
}
} else if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
is_multicast_ether_addr(hdr->addr1) &&
mesh_rmc_check(hdr->addr4, msh_h_get(hdr, hdrlen), rx->dev))
if (ieee80211_is_probe_req(hdr->frame_control) ||
ieee80211_is_probe_resp(hdr->frame_control) ||
ieee80211_is_beacon(hdr->frame_control))
return RX_CONTINUE;
return RX_DROP_MONITOR;
}
#define msh_h_get(h, l) ((struct ieee80211s_hdr *) ((u8 *)h + l))
if (ieee80211_is_data(hdr->frame_control) &&
is_multicast_ether_addr(hdr->addr1) &&
mesh_rmc_check(hdr->addr4, msh_h_get(hdr, hdrlen), rx->dev))
return RX_DROP_MONITOR;
#undef msh_h_get
......@@ -466,13 +467,11 @@ ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
static ieee80211_rx_result debug_noinline
ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
{
struct ieee80211_hdr *hdr;
hdr = (struct ieee80211_hdr *) rx->skb->data;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
/* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) {
if (unlikely(rx->fc & IEEE80211_FCTL_RETRY &&
if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
rx->sta->last_seq_ctrl[rx->queue] ==
hdr->seq_ctrl)) {
if (rx->flags & IEEE80211_RX_RA_MATCH) {
......@@ -501,15 +500,14 @@ ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
if (ieee80211_vif_is_mesh(&rx->sdata->vif))
return ieee80211_rx_mesh_check(rx);
if (unlikely(((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA ||
((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL &&
(rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)) &&
if (unlikely((ieee80211_is_data(hdr->frame_control) ||
ieee80211_is_pspoll(hdr->frame_control)) &&
rx->sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
(!rx->sta || !test_sta_flags(rx->sta, WLAN_STA_ASSOC)))) {
if ((!(rx->fc & IEEE80211_FCTL_FROMDS) &&
!(rx->fc & IEEE80211_FCTL_TODS) &&
(rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)
|| !(rx->flags & IEEE80211_RX_RA_MATCH)) {
if ((!ieee80211_has_fromds(hdr->frame_control) &&
!ieee80211_has_tods(hdr->frame_control) &&
ieee80211_is_data(hdr->frame_control)) ||
!(rx->flags & IEEE80211_RX_RA_MATCH)) {
/* Drop IBSS frames and frames for other hosts
* silently. */
return RX_DROP_MONITOR;
......@@ -525,7 +523,7 @@ ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
static ieee80211_rx_result debug_noinline
ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
int keyidx;
int hdrlen;
ieee80211_rx_result result = RX_DROP_UNUSABLE;
......@@ -557,7 +555,7 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
* possible.
*/
if (!(rx->fc & IEEE80211_FCTL_PROTECTED))
if (!ieee80211_has_protected(hdr->frame_control))
return RX_CONTINUE;
/*
......@@ -586,7 +584,7 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
(rx->status->flag & RX_FLAG_IV_STRIPPED))
return RX_CONTINUE;
hdrlen = ieee80211_get_hdrlen(rx->fc);
hdrlen = ieee80211_hdrlen(hdr->frame_control);
if (rx->skb->len < 8 + hdrlen)
return RX_DROP_UNUSABLE; /* TODO: count this? */
......@@ -618,7 +616,7 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
/* Check for weak IVs if possible */
if (rx->sta && rx->key->conf.alg == ALG_WEP &&
((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
ieee80211_is_data(hdr->frame_control) &&
(!(rx->status->flag & RX_FLAG_IV_STRIPPED) ||
!(rx->status->flag & RX_FLAG_DECRYPTED)) &&
ieee80211_wep_is_weak_iv(rx->skb, rx->key))
......@@ -710,7 +708,7 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
{
struct sta_info *sta = rx->sta;
struct net_device *dev = rx->dev;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
if (!sta)
return RX_CONTINUE;
......@@ -744,21 +742,20 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
sta->last_qual = rx->status->qual;
sta->last_noise = rx->status->noise;
if (!(rx->fc & IEEE80211_FCTL_MOREFRAGS)) {
if (!ieee80211_has_morefrags(hdr->frame_control)) {
/* Change STA power saving mode only in the end of a frame
* exchange sequence */
if (test_sta_flags(sta, WLAN_STA_PS) &&
!(rx->fc & IEEE80211_FCTL_PM))
!ieee80211_has_pm(hdr->frame_control))
rx->sent_ps_buffered += ap_sta_ps_end(dev, sta);
else if (!test_sta_flags(sta, WLAN_STA_PS) &&
(rx->fc & IEEE80211_FCTL_PM))
ieee80211_has_pm(hdr->frame_control))
ap_sta_ps_start(dev, sta);
}
/* Drop data::nullfunc frames silently, since they are used only to
* control station power saving mode. */
if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
(rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_NULLFUNC) {
if (ieee80211_is_nullfunc(hdr->frame_control)) {
I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
/* Update counter and free packet here to avoid counting this
* as a dropped packed. */
......@@ -1465,15 +1462,15 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx)
struct ieee80211_local *local = rx->local;
struct ieee80211_hw *hw = &local->hw;
struct sk_buff *skb = rx->skb;
struct ieee80211_bar *bar = (struct ieee80211_bar *) skb->data;
struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data;
struct tid_ampdu_rx *tid_agg_rx;
u16 start_seq_num;
u16 tid;
if (likely((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL))
if (likely(!ieee80211_is_ctl(bar->frame_control)))
return RX_CONTINUE;
if ((rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BACK_REQ) {
if (ieee80211_is_back_req(bar->frame_control)) {
if (!rx->sta)
return RX_CONTINUE;
tid = le16_to_cpu(bar->control) >> 12;
......@@ -1527,11 +1524,12 @@ static void ieee80211_rx_michael_mic_report(struct net_device *dev,
struct ieee80211_hdr *hdr,
struct ieee80211_rx_data *rx)
{
int keyidx, hdrlen;
int keyidx;
unsigned int hdrlen;
DECLARE_MAC_BUF(mac);
DECLARE_MAC_BUF(mac2);
hdrlen = ieee80211_get_hdrlen_from_skb(rx->skb);
hdrlen = ieee80211_hdrlen(hdr->frame_control);
if (rx->skb->len >= hdrlen + 4)
keyidx = rx->skb->data[hdrlen + 3] >> 6;
else
......@@ -1545,7 +1543,7 @@ static void ieee80211_rx_michael_mic_report(struct net_device *dev,
goto ignore;
}
if (!(rx->fc & IEEE80211_FCTL_PROTECTED))
if (!ieee80211_has_protected(hdr->frame_control))
goto ignore;
if (rx->sdata->vif.type == IEEE80211_IF_TYPE_AP && keyidx) {
......@@ -1558,9 +1556,8 @@ static void ieee80211_rx_michael_mic_report(struct net_device *dev,
goto ignore;
}
if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
(rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH))
if (!ieee80211_is_data(hdr->frame_control) &&
!ieee80211_is_auth(hdr->frame_control))
goto ignore;
mac80211_ev_michael_mic_failure(rx->dev, keyidx, hdr);
......@@ -1731,8 +1728,7 @@ static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
case IEEE80211_IF_TYPE_IBSS:
if (!bssid)
return 0;
if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT &&
(rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
if (ieee80211_is_beacon(hdr->frame_control)) {
if (!rx->sta)
rx->sta = ieee80211_ibss_add_sta(sdata->dev,
rx->skb, bssid, hdr->addr2,
......@@ -1783,8 +1779,7 @@ static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
return 0;
break;
case IEEE80211_IF_TYPE_WDS:
if (bssid ||
(rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
if (bssid || !ieee80211_is_data(hdr->frame_control))
return 0;
if (compare_ether_addr(sdata->u.wds.remote_addr, hdr->addr2))
return 0;
......
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