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openwrt/package/mac80211/patches/510-mac80211_4addr_vlan.patch
Felix Fietkau 20107c752e mac80211: fix a bug in broadcast handling of wds sta interfaces 
SVN-Revision: 18363
2009-11-11 05:15:41 +00:00

270 lines
8.3 KiB
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--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -208,6 +208,9 @@ struct ieee80211_if_wds {
struct ieee80211_if_vlan {
struct list_head list;
+
+ /* used for all tx if the VLAN is configured to 4-addr mode */
+ struct sta_info *sta;
};
struct mesh_stats {
@@ -457,6 +460,8 @@ struct ieee80211_sub_if_data {
int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
int max_ratectrl_rateidx; /* max TX rateidx for rate control */
+ bool use_4addr; /* use 4-address frames */
+
union {
struct ieee80211_if_ap ap;
struct ieee80211_if_wds wds;
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -36,6 +36,24 @@ static bool nl80211_type_check(enum nl80
}
}
+static bool nl80211_params_check(enum nl80211_iftype type,
+ struct vif_params *params)
+{
+ if (!nl80211_type_check(type))
+ return false;
+
+ if (params->use_4addr > 0) {
+ switch(type) {
+ case NL80211_IFTYPE_AP_VLAN:
+ case NL80211_IFTYPE_STATION:
+ break;
+ default:
+ return false;
+ }
+ }
+ return true;
+}
+
static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
enum nl80211_iftype type, u32 *flags,
struct vif_params *params)
@@ -45,7 +63,7 @@ static int ieee80211_add_iface(struct wi
struct ieee80211_sub_if_data *sdata;
int err;
- if (!nl80211_type_check(type))
+ if (!nl80211_params_check(type, params))
return -EINVAL;
err = ieee80211_if_add(local, name, &dev, type, params);
@@ -75,7 +93,7 @@ static int ieee80211_change_iface(struct
if (netif_running(dev))
return -EBUSY;
- if (!nl80211_type_check(type))
+ if (!nl80211_params_check(type, params))
return -EINVAL;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
@@ -89,6 +107,9 @@ static int ieee80211_change_iface(struct
params->mesh_id_len,
params->mesh_id);
+ if (params->use_4addr >= 0)
+ sdata->use_4addr = !!params->use_4addr;
+
if (sdata->vif.type != NL80211_IFTYPE_MONITOR || !flags)
return 0;
@@ -806,6 +827,13 @@ static int ieee80211_change_station(stru
return -EINVAL;
}
+ if (vlansdata->use_4addr) {
+ if (vlansdata->u.vlan.sta)
+ return -EBUSY;
+
+ rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
+ }
+
sta->sdata = vlansdata;
ieee80211_send_layer2_update(sta);
}
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -489,6 +489,9 @@ static void __sta_info_unlink(struct sta
local->num_sta--;
local->sta_generation++;
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ rcu_assign_pointer(sdata->u.vlan.sta, NULL);
+
if (local->ops->sta_notify) {
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
sdata = container_of(sdata->bss,
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1046,7 +1046,10 @@ ieee80211_tx_prepare(struct ieee80211_su
hdr = (struct ieee80211_hdr *) skb->data;
- tx->sta = sta_info_get(local, hdr->addr1);
+ if ((sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && sdata->use_4addr)
+ tx->sta = rcu_dereference(sdata->u.vlan.sta);
+ if (!tx->sta)
+ tx->sta = sta_info_get(local, hdr->addr1);
if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)) {
@@ -1608,7 +1611,7 @@ netdev_tx_t ieee80211_subif_start_xmit(s
const u8 *encaps_data;
int encaps_len, skip_header_bytes;
int nh_pos, h_pos;
- struct sta_info *sta;
+ struct sta_info *sta = NULL;
u32 sta_flags = 0;
if (unlikely(skb->len < ETH_HLEN)) {
@@ -1625,8 +1628,25 @@ netdev_tx_t ieee80211_subif_start_xmit(s
fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
switch (sdata->vif.type) {
- case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_AP_VLAN:
+ rcu_read_lock();
+ if (sdata->use_4addr)
+ sta = rcu_dereference(sdata->u.vlan.sta);
+ if (sta) {
+ fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
+ /* RA TA DA SA */
+ memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
+ memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN);
+ memcpy(hdr.addr3, skb->data, ETH_ALEN);
+ memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
+ hdrlen = 30;
+ sta_flags = get_sta_flags(sta);
+ }
+ rcu_read_unlock();
+ if (sta)
+ break;
+ /* fall through */
+ case NL80211_IFTYPE_AP:
fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
/* DA BSSID SA */
memcpy(hdr.addr1, skb->data, ETH_ALEN);
@@ -1700,12 +1720,21 @@ netdev_tx_t ieee80211_subif_start_xmit(s
break;
#endif
case NL80211_IFTYPE_STATION:
- fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
- /* BSSID SA DA */
memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
- memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
- memcpy(hdr.addr3, skb->data, ETH_ALEN);
- hdrlen = 24;
+ if (sdata->use_4addr && ethertype != ETH_P_PAE) {
+ fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
+ /* RA TA DA SA */
+ memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN);
+ memcpy(hdr.addr3, skb->data, ETH_ALEN);
+ memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
+ hdrlen = 30;
+ } else {
+ fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
+ /* BSSID SA DA */
+ memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
+ memcpy(hdr.addr3, skb->data, ETH_ALEN);
+ hdrlen = 24;
+ }
break;
case NL80211_IFTYPE_ADHOC:
/* DA SA BSSID */
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -772,6 +772,7 @@ int ieee80211_if_change_type(struct ieee
ieee80211_mandatory_rates(sdata->local,
sdata->local->hw.conf.channel->band);
sdata->drop_unencrypted = 0;
+ sdata->use_4addr = 0;
return 0;
}
@@ -853,6 +854,9 @@ int ieee80211_if_add(struct ieee80211_lo
params->mesh_id_len,
params->mesh_id);
+ if (params && params->use_4addr >= 0)
+ sdata->use_4addr = !!params->use_4addr;
+
mutex_lock(&local->iflist_mtx);
list_add_tail_rcu(&sdata->list, &local->interfaces);
mutex_unlock(&local->iflist_mtx);
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1237,6 +1237,13 @@ __ieee80211_data_to_8023(struct ieee8021
{
struct net_device *dev = rx->dev;
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->use_4addr &&
+ ieee80211_has_a4(hdr->frame_control))
+ return -1;
+ if (sdata->use_4addr && is_multicast_ether_addr(hdr->addr1))
+ return -1;
return ieee80211_data_to_8023(rx->skb, dev->dev_addr, sdata->vif.type);
}
@@ -1285,7 +1292,7 @@ ieee80211_deliver_skb(struct ieee80211_r
if ((sdata->vif.type == NL80211_IFTYPE_AP ||
sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
!(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
- (rx->flags & IEEE80211_RX_RA_MATCH)) {
+ (rx->flags & IEEE80211_RX_RA_MATCH) && !rx->sdata->use_4addr) {
if (is_multicast_ether_addr(ehdr->h_dest)) {
/*
* send multicast frames both to higher layers in
@@ -1590,6 +1597,7 @@ ieee80211_rx_h_data(struct ieee80211_rx_
{
struct net_device *dev = rx->dev;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
__le16 fc = hdr->frame_control;
int err;
@@ -1599,6 +1607,14 @@ ieee80211_rx_h_data(struct ieee80211_rx_
if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
return RX_DROP_MONITOR;
+ /*
+ * Allow the cooked monitor interface of an AP to see 4-addr frames so
+ * that a 4-addr station can be detected and moved into a separate VLAN
+ */
+ if (ieee80211_has_a4(hdr->frame_control) &&
+ sdata->vif.type == NL80211_IFTYPE_AP)
+ return RX_DROP_MONITOR;
+
err = __ieee80211_data_to_8023(rx);
if (unlikely(err))
return RX_DROP_UNUSABLE;
@@ -2039,7 +2055,7 @@ static int prepare_for_handlers(struct i
switch (sdata->vif.type) {
case NL80211_IFTYPE_STATION:
- if (!bssid)
+ if (!bssid && !sdata->use_4addr)
return 0;
if (!multicast &&
compare_ether_addr(sdata->dev->dev_addr, hdr->addr1) != 0) {
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -320,7 +320,9 @@ int ieee80211_data_to_8023(struct sk_buf
break;
case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
if (unlikely(iftype != NL80211_IFTYPE_WDS &&
- iftype != NL80211_IFTYPE_MESH_POINT))
+ iftype != NL80211_IFTYPE_MESH_POINT &&
+ iftype != NL80211_IFTYPE_AP_VLAN &&
+ iftype != NL80211_IFTYPE_STATION))
return -1;
if (iftype == NL80211_IFTYPE_MESH_POINT) {
struct ieee80211s_hdr *meshdr =
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