aboutsummaryrefslogtreecommitdiff
path: root/net/ieee80211/ieee80211_tx.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ieee80211/ieee80211_tx.c')
-rw-r--r--net/ieee80211/ieee80211_tx.c88
1 files changed, 70 insertions, 18 deletions
diff --git a/net/ieee80211/ieee80211_tx.c b/net/ieee80211/ieee80211_tx.c
index 8b4332f5339..6a5de1b8445 100644
--- a/net/ieee80211/ieee80211_tx.c
+++ b/net/ieee80211/ieee80211_tx.c
@@ -220,13 +220,43 @@ static struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size,
return txb;
}
+static int ieee80211_classify(struct sk_buff *skb)
+{
+ struct ethhdr *eth;
+ struct iphdr *ip;
+
+ eth = (struct ethhdr *)skb->data;
+ if (eth->h_proto != __constant_htons(ETH_P_IP))
+ return 0;
+
+ ip = skb->nh.iph;
+ switch (ip->tos & 0xfc) {
+ case 0x20:
+ return 2;
+ case 0x40:
+ return 1;
+ case 0x60:
+ return 3;
+ case 0x80:
+ return 4;
+ case 0xa0:
+ return 5;
+ case 0xc0:
+ return 6;
+ case 0xe0:
+ return 7;
+ default:
+ return 0;
+ }
+}
+
/* Incoming skb is converted to a txb which consists of
* a block of 802.11 fragment packets (stored as skbs) */
int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct ieee80211_device *ieee = netdev_priv(dev);
struct ieee80211_txb *txb = NULL;
- struct ieee80211_hdr_3addr *frag_hdr;
+ struct ieee80211_hdr_3addrqos *frag_hdr;
int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size,
rts_required;
unsigned long flags;
@@ -234,9 +264,10 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
int ether_type, encrypt, host_encrypt, host_encrypt_msdu, host_build_iv;
int bytes, fc, hdr_len;
struct sk_buff *skb_frag;
- struct ieee80211_hdr_3addr header = { /* Ensure zero initialized */
+ struct ieee80211_hdr_3addrqos header = {/* Ensure zero initialized */
.duration_id = 0,
- .seq_ctl = 0
+ .seq_ctl = 0,
+ .qos_ctl = 0
};
u8 dest[ETH_ALEN], src[ETH_ALEN];
struct ieee80211_crypt_data *crypt;
@@ -282,12 +313,6 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
memcpy(dest, skb->data, ETH_ALEN);
memcpy(src, skb->data + ETH_ALEN, ETH_ALEN);
- /* Advance the SKB to the start of the payload */
- skb_pull(skb, sizeof(struct ethhdr));
-
- /* Determine total amount of storage required for TXB packets */
- bytes = skb->len + SNAP_SIZE + sizeof(u16);
-
if (host_encrypt || host_build_iv)
fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA |
IEEE80211_FCTL_PROTECTED;
@@ -306,9 +331,23 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
memcpy(header.addr2, src, ETH_ALEN);
memcpy(header.addr3, ieee->bssid, ETH_ALEN);
}
- header.frame_ctl = cpu_to_le16(fc);
hdr_len = IEEE80211_3ADDR_LEN;
+ if (ieee->is_qos_active && ieee->is_qos_active(dev, skb)) {
+ fc |= IEEE80211_STYPE_QOS_DATA;
+ hdr_len += 2;
+
+ skb->priority = ieee80211_classify(skb);
+ header.qos_ctl |= skb->priority & IEEE80211_QCTL_TID;
+ }
+ header.frame_ctl = cpu_to_le16(fc);
+
+ /* Advance the SKB to the start of the payload */
+ skb_pull(skb, sizeof(struct ethhdr));
+
+ /* Determine total amount of storage required for TXB packets */
+ bytes = skb->len + SNAP_SIZE + sizeof(u16);
+
/* Encrypt msdu first on the whole data packet. */
if ((host_encrypt || host_encrypt_msdu) &&
crypt && crypt->ops && crypt->ops->encrypt_msdu) {
@@ -402,7 +441,7 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
if (rts_required) {
skb_frag = txb->fragments[0];
frag_hdr =
- (struct ieee80211_hdr_3addr *)skb_put(skb_frag, hdr_len);
+ (struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len);
/*
* Set header frame_ctl to the RTS.
@@ -433,7 +472,7 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
crypt->ops->extra_mpdu_prefix_len);
frag_hdr =
- (struct ieee80211_hdr_3addr *)skb_put(skb_frag, hdr_len);
+ (struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len);
memcpy(frag_hdr, &header, hdr_len);
/* If this is not the last fragment, then add the MOREFRAGS
@@ -516,7 +555,8 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
/* Incoming 802.11 strucure is converted to a TXB
* a block of 802.11 fragment packets (stored as skbs) */
int ieee80211_tx_frame(struct ieee80211_device *ieee,
- struct ieee80211_hdr *frame, int len)
+ struct ieee80211_hdr *frame, int hdr_len, int total_len,
+ int encrypt_mpdu)
{
struct ieee80211_txb *txb = NULL;
unsigned long flags;
@@ -526,6 +566,9 @@ int ieee80211_tx_frame(struct ieee80211_device *ieee,
spin_lock_irqsave(&ieee->lock, flags);
+ if (encrypt_mpdu && !ieee->sec.encrypt)
+ encrypt_mpdu = 0;
+
/* If there is no driver handler to take the TXB, dont' bother
* creating it... */
if (!ieee->hard_start_xmit) {
@@ -533,32 +576,41 @@ int ieee80211_tx_frame(struct ieee80211_device *ieee,
goto success;
}
- if (unlikely(len < 24)) {
+ if (unlikely(total_len < 24)) {
printk(KERN_WARNING "%s: skb too small (%d).\n",
- ieee->dev->name, len);
+ ieee->dev->name, total_len);
goto success;
}
+ if (encrypt_mpdu)
+ frame->frame_ctl |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+
/* When we allocate the TXB we allocate enough space for the reserve
* and full fragment bytes (bytes_per_frag doesn't include prefix,
* postfix, header, FCS, etc.) */
- txb = ieee80211_alloc_txb(1, len, ieee->tx_headroom, GFP_ATOMIC);
+ txb = ieee80211_alloc_txb(1, total_len, ieee->tx_headroom, GFP_ATOMIC);
if (unlikely(!txb)) {
printk(KERN_WARNING "%s: Could not allocate TXB\n",
ieee->dev->name);
goto failed;
}
txb->encrypted = 0;
- txb->payload_size = len;
+ txb->payload_size = total_len;
skb_frag = txb->fragments[0];
- memcpy(skb_put(skb_frag, len), frame, len);
+ memcpy(skb_put(skb_frag, total_len), frame, total_len);
if (ieee->config &
(CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
skb_put(skb_frag, 4);
+ /* To avoid overcomplicating things, we do the corner-case frame
+ * encryption in software. The only real situation where encryption is
+ * needed here is during software-based shared key authentication. */
+ if (encrypt_mpdu)
+ ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len);
+
success:
spin_unlock_irqrestore(&ieee->lock, flags);
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-25 09:57:17 +0000