******************************************************************************/
#include <linux/compiler.h>
+#include <linux/config.h>
#include <linux/errno.h>
#include <linux/if_arp.h>
#include <linux/in6.h>
`--------------------------------------------------| |------'
Total: 28 non-data bytes `----.----'
|
- .- 'Frame data' expands, if WEP enabled, to <----------'
- |
- V
- ,-----------------------.
-Bytes | 4 | 0-2296 | 4 |
- |-----|-----------|-----|
-Desc. | IV | Encrypted | ICV |
- | | Packet | |
- `-----| |-----'
- `-----.-----'
- |
- .- 'Encrypted Packet' expands to
+ .- 'Frame data' expands to <---------------------------'
|
V
,---------------------------------------------------.
Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP |
| DSAP | SSAP | | | | Packet |
| 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | |
- `----------------------------------------------------
+ `-----------------------------------------| |
+Total: 8 non-data bytes `----.----'
+ |
+ .- 'IP Packet' expands, if WEP enabled, to <--'
+ |
+ V
+ ,-----------------------.
+Bytes | 4 | 0-2296 | 4 |
+ |-----|-----------|-----|
+Desc. | IV | Encrypted | ICV |
+ | | IP Packet | |
+ `-----------------------'
Total: 8 non-data bytes
802.3 Ethernet Data Frame
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_3addrqos *frag_hdr;
+ struct ieee80211_hdr_3addr *frag_hdr;
int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size,
rts_required;
unsigned long flags;
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_3addrqos header = {/* Ensure zero initialized */
+ struct ieee80211_hdr_3addr header = { /* Ensure zero initialized */
.duration_id = 0,
- .seq_ctl = 0,
- .qos_ctl = 0
+ .seq_ctl = 0
};
u8 dest[ETH_ALEN], src[ETH_ALEN];
struct ieee80211_crypt_data *crypt;
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;
memcpy(header.addr2, src, ETH_ALEN);
memcpy(header.addr3, ieee->bssid, ETH_ALEN);
}
- 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);
+ hdr_len = IEEE80211_3ADDR_LEN;
/* Encrypt msdu first on the whole data packet. */
if ((host_encrypt || host_encrypt_msdu) &&
if (rts_required) {
skb_frag = txb->fragments[0];
frag_hdr =
- (struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len);
+ (struct ieee80211_hdr_3addr *)skb_put(skb_frag, hdr_len);
/*
* Set header frame_ctl to the RTS.
crypt->ops->extra_mpdu_prefix_len);
frag_hdr =
- (struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len);
+ (struct ieee80211_hdr_3addr *)skb_put(skb_frag, hdr_len);
memcpy(frag_hdr, &header, hdr_len);
/* If this is not the last fragment, then add the MOREFRAGS
atomic_inc(&crypt->refcnt);
if (crypt->ops->build_iv)
crypt->ops->build_iv(skb_frag, hdr_len,
- ieee->sec.keys[ieee->sec.active_key],
- ieee->sec.key_sizes[ieee->sec.active_key],
- crypt->priv);
+ crypt->priv);
atomic_dec(&crypt->refcnt);
}
/* 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 hdr_len, int total_len,
- int encrypt_mpdu)
+ struct ieee80211_hdr *frame, int len)
{
struct ieee80211_txb *txb = NULL;
unsigned long flags;
struct net_device_stats *stats = &ieee->stats;
struct sk_buff *skb_frag;
int priority = -1;
- int fraglen = total_len;
- int headroom = ieee->tx_headroom;
- struct ieee80211_crypt_data *crypt = ieee->crypt[ieee->tx_keyidx];
spin_lock_irqsave(&ieee->lock, flags);
- if (encrypt_mpdu && (!ieee->sec.encrypt || !crypt))
- encrypt_mpdu = 0;
-
/* If there is no driver handler to take the TXB, dont' bother
* creating it... */
if (!ieee->hard_start_xmit) {
goto success;
}
- if (unlikely(total_len < 24)) {
+ if (unlikely(len < 24)) {
printk(KERN_WARNING "%s: skb too small (%d).\n",
- ieee->dev->name, total_len);
+ ieee->dev->name, len);
goto success;
}
- if (encrypt_mpdu) {
- frame->frame_ctl |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
- fraglen += crypt->ops->extra_mpdu_prefix_len +
- crypt->ops->extra_mpdu_postfix_len;
- headroom += crypt->ops->extra_mpdu_prefix_len;
- }
-
/* 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, fraglen, headroom, GFP_ATOMIC);
+ txb = ieee80211_alloc_txb(1, 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 = fraglen;
+ txb->payload_size = len;
skb_frag = txb->fragments[0];
- memcpy(skb_put(skb_frag, total_len), frame, total_len);
+ memcpy(skb_put(skb_frag, len), frame, 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);
git://git.onelab.eu / linux-2.6.git / blobdiff