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-rw-r--r--net/wireless/util.c126
1 files changed, 118 insertions, 8 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 6a750bc..f0536d4 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -544,7 +544,8 @@ EXPORT_SYMBOL(ieee80211_data_from_8023);
void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
const u8 *addr, enum nl80211_iftype iftype,
- const unsigned int extra_headroom)
+ const unsigned int extra_headroom,
+ bool has_80211_header)
{
struct sk_buff *frame = NULL;
u16 ethertype;
@@ -553,14 +554,18 @@ void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
int remaining, err;
u8 dst[ETH_ALEN], src[ETH_ALEN];
- err = ieee80211_data_to_8023(skb, addr, iftype);
- if (err)
- goto out;
+ if (has_80211_header) {
+ err = ieee80211_data_to_8023(skb, addr, iftype);
+ if (err)
+ goto out;
- /* skip the wrapping header */
- eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr));
- if (!eth)
- goto out;
+ /* skip the wrapping header */
+ eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr));
+ if (!eth)
+ goto out;
+ } else {
+ eth = (struct ethhdr *) skb->data;
+ }
while (skb != frame) {
u8 padding;
@@ -803,6 +808,11 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
return -EBUSY;
if (ntype != otype) {
+ err = cfg80211_can_change_interface(rdev, dev->ieee80211_ptr,
+ ntype);
+ if (err)
+ return err;
+
dev->ieee80211_ptr->use_4addr = false;
dev->ieee80211_ptr->mesh_id_up_len = 0;
@@ -896,3 +906,103 @@ u16 cfg80211_calculate_bitrate(struct rate_info *rate)
/* do NOT round down here */
return (bitrate + 50000) / 100000;
}
+
+int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
+ u32 beacon_int)
+{
+ struct wireless_dev *wdev;
+ int res = 0;
+
+ if (!beacon_int)
+ return -EINVAL;
+
+ mutex_lock(&rdev->devlist_mtx);
+
+ list_for_each_entry(wdev, &rdev->netdev_list, list) {
+ if (!wdev->beacon_interval)
+ continue;
+ if (wdev->beacon_interval != beacon_int) {
+ res = -EINVAL;
+ break;
+ }
+ }
+
+ mutex_unlock(&rdev->devlist_mtx);
+
+ return res;
+}
+
+int cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev,
+ enum nl80211_iftype iftype)
+{
+ struct wireless_dev *wdev_iter;
+ int num[NUM_NL80211_IFTYPES];
+ int total = 1;
+ int i, j;
+
+ ASSERT_RTNL();
+
+ /* Always allow software iftypes */
+ if (rdev->wiphy.software_iftypes & BIT(iftype))
+ return 0;
+
+ /*
+ * Drivers will gradually all set this flag, until all
+ * have it we only enforce for those that set it.
+ */
+ if (!(rdev->wiphy.flags & WIPHY_FLAG_ENFORCE_COMBINATIONS))
+ return 0;
+
+ memset(num, 0, sizeof(num));
+
+ num[iftype] = 1;
+
+ mutex_lock(&rdev->devlist_mtx);
+ list_for_each_entry(wdev_iter, &rdev->netdev_list, list) {
+ if (wdev_iter == wdev)
+ continue;
+ if (!netif_running(wdev_iter->netdev))
+ continue;
+
+ if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype))
+ continue;
+
+ num[wdev_iter->iftype]++;
+ total++;
+ }
+ mutex_unlock(&rdev->devlist_mtx);
+
+ for (i = 0; i < rdev->wiphy.n_iface_combinations; i++) {
+ const struct ieee80211_iface_combination *c;
+ struct ieee80211_iface_limit *limits;
+
+ c = &rdev->wiphy.iface_combinations[i];
+
+ limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
+ GFP_KERNEL);
+ if (!limits)
+ return -ENOMEM;
+ if (total > c->max_interfaces)
+ goto cont;
+
+ for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
+ if (rdev->wiphy.software_iftypes & BIT(iftype))
+ continue;
+ for (j = 0; j < c->n_limits; j++) {
+ if (!(limits[j].types & iftype))
+ continue;
+ if (limits[j].max < num[iftype])
+ goto cont;
+ limits[j].max -= num[iftype];
+ }
+ }
+ /* yay, it fits */
+ kfree(limits);
+ return 0;
+ cont:
+ kfree(limits);
+ }
+
+ return -EBUSY;
+}
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