[MAC80211]: split up __ieee80211_rx
The really indented part that does the huge switch on the interface
type is a nuisance. Put it into an own function 'prepare_for_handlers'.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Jiri Benc <jbenc@suse.cz>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index f7a1b61..21d4015 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1240,6 +1240,73 @@
/* main receive path */
+static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
+ u8 *bssid, struct ieee80211_txrx_data *rx,
+ struct ieee80211_hdr *hdr)
+{
+ int multicast = is_multicast_ether_addr(hdr->addr1);
+
+ switch (sdata->type) {
+ case IEEE80211_IF_TYPE_STA:
+ if (!bssid)
+ return 0;
+ if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) {
+ if (!rx->u.rx.in_scan)
+ return 0;
+ rx->u.rx.ra_match = 0;
+ } else if (!multicast &&
+ compare_ether_addr(sdata->dev->dev_addr,
+ hdr->addr1) != 0) {
+ if (!sdata->promisc)
+ return 0;
+ rx->u.rx.ra_match = 0;
+ }
+ break;
+ case IEEE80211_IF_TYPE_IBSS:
+ if (!bssid)
+ return 0;
+ if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) {
+ if (!rx->u.rx.in_scan)
+ return 0;
+ rx->u.rx.ra_match = 0;
+ } else if (!multicast &&
+ compare_ether_addr(sdata->dev->dev_addr,
+ hdr->addr1) != 0) {
+ if (!sdata->promisc)
+ return 0;
+ rx->u.rx.ra_match = 0;
+ } else if (!rx->sta)
+ rx->sta = ieee80211_ibss_add_sta(sdata->dev, rx->skb,
+ bssid, hdr->addr2);
+ break;
+ case IEEE80211_IF_TYPE_AP:
+ if (!bssid) {
+ if (compare_ether_addr(sdata->dev->dev_addr,
+ hdr->addr1))
+ return 0;
+ } else if (!ieee80211_bssid_match(bssid,
+ sdata->dev->dev_addr)) {
+ if (!rx->u.rx.in_scan)
+ return 0;
+ rx->u.rx.ra_match = 0;
+ }
+ if (sdata->dev == sdata->local->mdev && !rx->u.rx.in_scan)
+ /* do not receive anything via
+ * master device when not scanning */
+ return 0;
+ break;
+ case IEEE80211_IF_TYPE_WDS:
+ if (bssid ||
+ (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
+ return 0;
+ if (compare_ether_addr(sdata->u.wds.remote_addr, hdr->addr2))
+ return 0;
+ break;
+ }
+
+ return 1;
+}
+
/*
* This is the receive path handler. It is called by a low level driver when an
* 802.11 MPDU is received from the hardware.
@@ -1253,8 +1320,7 @@
struct ieee80211_hdr *hdr;
struct ieee80211_txrx_data rx;
u16 type;
- int multicast;
- int radiotap_len = 0;
+ int radiotap_len = 0, prepres;
struct ieee80211_sub_if_data *prev = NULL;
struct sk_buff *skb_new;
u8 *bssid;
@@ -1274,18 +1340,16 @@
type = rx.fc & IEEE80211_FCTL_FTYPE;
if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT)
local->dot11ReceivedFragmentCount++;
- multicast = is_multicast_ether_addr(hdr->addr1);
- if (skb->len >= 16)
+ if (skb->len >= 16) {
sta = rx.sta = sta_info_get(local, hdr->addr2);
- else
+ if (sta) {
+ rx.dev = rx.sta->dev;
+ rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev);
+ }
+ } else
sta = rx.sta = NULL;
- if (sta) {
- rx.dev = sta->dev;
- rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev);
- }
-
if ((status->flag & RX_FLAG_MMIC_ERROR)) {
ieee80211_rx_michael_mic_report(local->mdev, hdr, sta, &rx);
goto end;
@@ -1301,10 +1365,10 @@
skb_push(skb, radiotap_len);
if (sta && !sta->assoc_ap && !(sta->flags & WLAN_STA_WDS) &&
- !local->iff_promiscs && !multicast) {
+ !local->iff_promiscs && !is_multicast_ether_addr(hdr->addr1)) {
rx.u.rx.ra_match = 1;
ieee80211_invoke_rx_handlers(local, local->rx_handlers, &rx,
- sta);
+ rx.sta);
sta_info_put(sta);
return;
}
@@ -1314,68 +1378,13 @@
read_lock(&local->sub_if_lock);
list_for_each_entry(sdata, &local->sub_if_list, list) {
rx.u.rx.ra_match = 1;
- switch (sdata->type) {
- case IEEE80211_IF_TYPE_STA:
- if (!bssid)
- continue;
- if (!ieee80211_bssid_match(bssid,
- sdata->u.sta.bssid)) {
- if (!rx.u.rx.in_scan)
- continue;
- rx.u.rx.ra_match = 0;
- } else if (!multicast &&
- compare_ether_addr(sdata->dev->dev_addr,
- hdr->addr1) != 0) {
- if (!sdata->promisc)
- continue;
- rx.u.rx.ra_match = 0;
- }
- break;
- case IEEE80211_IF_TYPE_IBSS:
- if (!bssid)
- continue;
- if (!ieee80211_bssid_match(bssid,
- sdata->u.sta.bssid)) {
- if (!rx.u.rx.in_scan)
- continue;
- rx.u.rx.ra_match = 0;
- } else if (!multicast &&
- compare_ether_addr(sdata->dev->dev_addr,
- hdr->addr1) != 0) {
- if (!sdata->promisc)
- continue;
- rx.u.rx.ra_match = 0;
- } else if (!sta)
- sta = rx.sta =
- ieee80211_ibss_add_sta(sdata->dev,
- skb, bssid,
- hdr->addr2);
- break;
- case IEEE80211_IF_TYPE_AP:
- if (!bssid) {
- if (compare_ether_addr(sdata->dev->dev_addr,
- hdr->addr1))
- continue;
- } else if (!ieee80211_bssid_match(bssid,
- sdata->dev->dev_addr)) {
- if (!rx.u.rx.in_scan)
- continue;
- rx.u.rx.ra_match = 0;
- }
- if (sdata->dev == local->mdev && !rx.u.rx.in_scan)
- /* do not receive anything via
- * master device when not scanning */
- continue;
- break;
- case IEEE80211_IF_TYPE_WDS:
- if (bssid ||
- (rx.fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
- continue;
- if (compare_ether_addr(sdata->u.wds.remote_addr,
- hdr->addr2))
- continue;
- break;
- }
+
+ prepres = prepare_for_handlers(sdata, bssid, &rx, hdr);
+ /* prepare_for_handlers can change sta */
+ sta = rx.sta;
+
+ if (!prepres)
+ continue;
if (prev) {
skb_new = skb_copy(skb, GFP_ATOMIC);