static int __init ieee80211_init(void)
{
#ifdef CONFIG_IEEE80211_DEBUG
struct proc_dir_entry *e;
ieee80211_debug_level = debug;
ieee80211_proc = proc_mkdir(DRV_NAME, proc_net);
if (ieee80211_proc == NULL) {
IEEE80211_ERROR("Unable to create " DRV_NAME
" proc directory\n");
return -EIO;
}
e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
ieee80211_proc);
if (!e) {
remove_proc_entry(DRV_NAME, proc_net);
ieee80211_proc = NULL;
return -EIO;
}
e->read_proc = show_debug_level;
e->write_proc = store_debug_level;
e->data = NULL;
#endif /* CONFIG_IEEE80211_DEBUG */
printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
return 0;
}
int ieee80211_debug_init(void)
{
struct proc_dir_entry *e;
ieee80211_debug_level = debug;
ieee80211_proc = create_proc_entry(DRV_NAME, S_IFDIR, init_net.proc_net);
if (ieee80211_proc == NULL) {
IEEE80211_ERROR("Unable to create " DRV_NAME
" proc directory\n");
return -EIO;
}
e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
ieee80211_proc);
if (!e) {
remove_proc_entry(DRV_NAME, init_net.proc_net);
ieee80211_proc = NULL;
return -EIO;
}
e->read_proc = show_debug_level;
e->write_proc = store_debug_level;
e->data = NULL;
return 0;
}
int __init ieee80211_rtl_init(void)
{
struct proc_dir_entry *e;
int retval;
retval = ieee80211_crypto_init();
if (retval)
return retval;
retval = ieee80211_crypto_tkip_init();
if (retval) {
ieee80211_crypto_deinit();
return retval;
}
retval = ieee80211_crypto_ccmp_init();
if (retval) {
ieee80211_crypto_tkip_exit();
ieee80211_crypto_deinit();
return retval;
}
retval = ieee80211_crypto_wep_init();
if (retval) {
ieee80211_crypto_ccmp_exit();
ieee80211_crypto_tkip_exit();
ieee80211_crypto_deinit();
return retval;
}
ieee80211_debug_level = debug;
ieee80211_proc = create_proc_entry(DRV_NAME, S_IFDIR, init_net.proc_net);
if (ieee80211_proc == NULL) {
IEEE80211_ERROR("Unable to create " DRV_NAME
" proc directory\n");
return -EIO;
}
e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
ieee80211_proc);
if (!e) {
remove_proc_entry(DRV_NAME, init_net.proc_net);
ieee80211_proc = NULL;
return -EIO;
}
e->read_proc = show_debug_level;
e->write_proc = store_debug_level;
e->data = NULL;
return 0;
}
int __init ieee80211_debug_init(void)
{
struct proc_dir_entry *e;
ieee80211_debug_level = debug;
ieee80211_proc = proc_mkdir(DRV_NAME, init_net.proc_net);
if (ieee80211_proc == NULL) {
IEEE80211_ERROR("Unable to create " DRV_NAME
" proc directory\n");
return -EIO;
}
e = proc_create("debug_level", S_IRUGO | S_IWUSR,
ieee80211_proc, &fops);
if (!e) {
remove_proc_entry(DRV_NAME, init_net.proc_net);
ieee80211_proc = NULL;
return -EIO;
}
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;
int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size,
rts_required;
unsigned long flags;
struct net_device_stats *stats = &ieee->stats;
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 */
.duration_id = 0,
.seq_ctl = 0,
.qos_ctl = 0
};
u8 dest[ETH_ALEN], src[ETH_ALEN];
struct ieee80211_crypt_data *crypt;
int priority = skb->priority;
int snapped = 0;
if (ieee->is_queue_full && (*ieee->is_queue_full) (dev, priority))
return NETDEV_TX_BUSY;
spin_lock_irqsave(&ieee->lock, flags);
/* If there is no driver handler to take the TXB, dont' bother
* creating it... */
if (!ieee->hard_start_xmit) {
printk(KERN_WARNING "%s: No xmit handler.\n", ieee->dev->name);
goto success;
}
if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) {
printk(KERN_WARNING "%s: skb too small (%d).\n",
ieee->dev->name, skb->len);
goto success;
}
ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto);
crypt = ieee->crypt[ieee->tx_keyidx];
encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) &&
ieee->sec.encrypt;
host_encrypt = ieee->host_encrypt && encrypt && crypt;
host_encrypt_msdu = ieee->host_encrypt_msdu && encrypt && crypt;
host_build_iv = ieee->host_build_iv && encrypt && crypt;
if (!encrypt && ieee->ieee802_1x &&
ieee->drop_unencrypted && ether_type != ETH_P_PAE) {
stats->tx_dropped++;
goto success;
}
/* Save source and destination addresses */
memcpy(dest, skb->data, ETH_ALEN);
memcpy(src, skb->data + ETH_ALEN, ETH_ALEN);
if (host_encrypt || host_build_iv)
fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA |
IEEE80211_FCTL_PROTECTED;
else
fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA;
if (ieee->iw_mode == IW_MODE_INFRA) {
fc |= IEEE80211_FCTL_TODS;
/* To DS: Addr1 = BSSID, Addr2 = SA, Addr3 = DA */
memcpy(header.addr1, ieee->bssid, ETH_ALEN);
memcpy(header.addr2, src, ETH_ALEN);
memcpy(header.addr3, dest, ETH_ALEN);
} else if (ieee->iw_mode == IW_MODE_ADHOC) {
/* not From/To DS: Addr1 = DA, Addr2 = SA, Addr3 = BSSID */
memcpy(header.addr1, dest, ETH_ALEN);
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);
/* Encrypt msdu first on the whole data packet. */
if ((host_encrypt || host_encrypt_msdu) &&
crypt && crypt->ops && crypt->ops->encrypt_msdu) {
int res = 0;
int len = bytes + hdr_len + crypt->ops->extra_msdu_prefix_len +
crypt->ops->extra_msdu_postfix_len;
struct sk_buff *skb_new = dev_alloc_skb(len);
if (unlikely(!skb_new))
goto failed;
skb_reserve(skb_new, crypt->ops->extra_msdu_prefix_len);
memcpy(skb_put(skb_new, hdr_len), &header, hdr_len);
snapped = 1;
ieee80211_copy_snap(skb_put(skb_new, SNAP_SIZE + sizeof(u16)),
ether_type);
memcpy(skb_put(skb_new, skb->len), skb->data, skb->len);
res = crypt->ops->encrypt_msdu(skb_new, hdr_len, crypt->priv);
if (res < 0) {
IEEE80211_ERROR("msdu encryption failed\n");
dev_kfree_skb_any(skb_new);
goto failed;
}
dev_kfree_skb_any(skb);
skb = skb_new;
bytes += crypt->ops->extra_msdu_prefix_len +
crypt->ops->extra_msdu_postfix_len;
skb_pull(skb, hdr_len);
}
if (host_encrypt || ieee->host_open_frag) {
/* Determine fragmentation size based on destination (multicast
* and broadcast are not fragmented) */
if (is_multicast_ether_addr(dest) ||
is_broadcast_ether_addr(dest))
frag_size = MAX_FRAG_THRESHOLD;
else
frag_size = ieee->fts;
/* Determine amount of payload per fragment. Regardless of if
* this stack is providing the full 802.11 header, one will
* eventually be affixed to this fragment -- so we must account
* for it when determining the amount of payload space. */
bytes_per_frag = frag_size - IEEE80211_3ADDR_LEN;
if (ieee->config &
(CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
bytes_per_frag -= IEEE80211_FCS_LEN;
/* Each fragment may need to have room for encryptiong
* pre/postfix */
if (host_encrypt)
bytes_per_frag -= crypt->ops->extra_mpdu_prefix_len +
crypt->ops->extra_mpdu_postfix_len;
/* Number of fragments is the total
* bytes_per_frag / payload_per_fragment */
nr_frags = bytes / bytes_per_frag;
bytes_last_frag = bytes % bytes_per_frag;
if (bytes_last_frag)
nr_frags++;
else
bytes_last_frag = bytes_per_frag;
} else {
nr_frags = 1;
bytes_per_frag = bytes_last_frag = bytes;
frag_size = bytes + IEEE80211_3ADDR_LEN;
}
rts_required = (frag_size > ieee->rts
&& ieee->config & CFG_IEEE80211_RTS);
if (rts_required)
nr_frags++;
/* 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(nr_frags, frag_size,
ieee->tx_headroom, GFP_ATOMIC);
if (unlikely(!txb)) {
printk(KERN_WARNING "%s: Could not allocate TXB\n",
ieee->dev->name);
goto failed;
}
txb->encrypted = encrypt;
if (host_encrypt)
txb->payload_size = frag_size * (nr_frags - 1) +
bytes_last_frag;
else
txb->payload_size = bytes;
if (rts_required) {
skb_frag = txb->fragments[0];
frag_hdr =
(struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len);
/*
* Set header frame_ctl to the RTS.
*/
header.frame_ctl =
cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
memcpy(frag_hdr, &header, hdr_len);
/*
* Restore header frame_ctl to the original data setting.
*/
header.frame_ctl = cpu_to_le16(fc);
if (ieee->config &
(CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
skb_put(skb_frag, 4);
txb->rts_included = 1;
i = 1;
} else
i = 0;
for (; i < nr_frags; i++) {
skb_frag = txb->fragments[i];
if (host_encrypt || host_build_iv)
skb_reserve(skb_frag,
crypt->ops->extra_mpdu_prefix_len);
frag_hdr =
(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
* bit to the frame control */
if (i != nr_frags - 1) {
frag_hdr->frame_ctl =
cpu_to_le16(fc | IEEE80211_FCTL_MOREFRAGS);
bytes = bytes_per_frag;
} else {
/* The last fragment takes the remaining length */
bytes = bytes_last_frag;
}
if (i == 0 && !snapped) {
ieee80211_copy_snap(skb_put
(skb_frag, SNAP_SIZE + sizeof(u16)),
ether_type);
bytes -= SNAP_SIZE + sizeof(u16);
}
memcpy(skb_put(skb_frag, bytes), skb->data, bytes);
/* Advance the SKB... */
skb_pull(skb, bytes);
/* Encryption routine will move the header forward in order
* to insert the IV between the header and the payload */
if (host_encrypt)
ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len);
else if (host_build_iv) {
struct ieee80211_crypt_data *crypt;
crypt = ieee->crypt[ieee->tx_keyidx];
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);
atomic_dec(&crypt->refcnt);
}
if (ieee->config &
(CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
skb_put(skb_frag, 4);
}
success:
spin_unlock_irqrestore(&ieee->lock, flags);
dev_kfree_skb_any(skb);
if (txb) {
int ret = (*ieee->hard_start_xmit) (txb, dev, priority);
if (ret == 0) {
stats->tx_packets++;
stats->tx_bytes += txb->payload_size;
return 0;
}
if (ret == NETDEV_TX_BUSY) {
printk(KERN_ERR "%s: NETDEV_TX_BUSY returned; "
"driver should report queue full via "
"ieee_device->is_queue_full.\n",
ieee->dev->name);
}
ieee80211_txb_free(txb);
}
return 0;
failed:
spin_unlock_irqrestore(&ieee->lock, flags);
netif_stop_queue(dev);
stats->tx_errors++;
return 1;
}
/* 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_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) {
printk(KERN_WARNING "%s: No xmit handler.\n", ieee->dev->name);
goto success;
}
if (unlikely(total_len < 24)) {
printk(KERN_WARNING "%s: skb too small (%d).\n",
ieee->dev->name, total_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);
if (unlikely(!txb)) {
printk(KERN_WARNING "%s: Could not allocate TXB\n",
ieee->dev->name);
goto failed;
}
txb->encrypted = 0;
txb->payload_size = fraglen;
skb_frag = txb->fragments[0];
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);
if (txb) {
if ((*ieee->hard_start_xmit) (txb, ieee->dev, priority) == 0) {
stats->tx_packets++;
stats->tx_bytes += txb->payload_size;
return 0;
}
ieee80211_txb_free(txb);
}
return 0;
failed:
spin_unlock_irqrestore(&ieee->lock, flags);
stats->tx_errors++;
return 1;
}
EXPORT_SYMBOL(ieee80211_tx_frame);
EXPORT_SYMBOL(ieee80211_txb_free);
struct net_device *alloc_ieee80211(int sizeof_priv)
{
struct ieee80211_device *ieee;
struct net_device *dev;
int err;
IEEE80211_DEBUG_INFO("Initializing...\n");
dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
if (!dev) {
IEEE80211_ERROR("Unable to network device.\n");
goto failed;
}
ieee = netdev_priv(dev);
dev->hard_start_xmit = ieee80211_xmit;
dev->change_mtu = ieee80211_change_mtu;
/* Drivers are free to override this if the generic implementation
* does not meet their needs. */
dev->get_stats = ieee80211_generic_get_stats;
ieee->dev = dev;
err = ieee80211_networks_allocate(ieee);
if (err) {
IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", err);
goto failed;
}
ieee80211_networks_initialize(ieee);
/* Default fragmentation threshold is maximum payload size */
ieee->fts = DEFAULT_FTS;
ieee->rts = DEFAULT_FTS;
ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
ieee->open_wep = 1;
/* Default to enabling full open WEP with host based encrypt/decrypt */
ieee->host_encrypt = 1;
ieee->host_decrypt = 1;
ieee->host_mc_decrypt = 1;
/* Host fragementation in Open mode. Default is enabled.
* Note: host fragmentation is always enabled if host encryption
* is enabled. For cards can do hardware encryption, they must do
* hardware fragmentation as well. So we don't need a variable
* like host_enc_frag. */
ieee->host_open_frag = 1;
ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
INIT_LIST_HEAD(&ieee->crypt_deinit_list);
setup_timer(&ieee->crypt_deinit_timer, ieee80211_crypt_deinit_handler,
(unsigned long)ieee);
ieee->crypt_quiesced = 0;
spin_lock_init(&ieee->lock);
ieee->wpa_enabled = 0;
ieee->drop_unencrypted = 0;
ieee->privacy_invoked = 0;
return dev;
failed:
if (dev)
free_netdev(dev);
return NULL;
}
struct net_device *alloc_ieee80211(int sizeof_priv)
{
struct ieee80211_device *ieee;
struct net_device *dev;
int i,err;
IEEE80211_DEBUG_INFO("Initializing...\n");
dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
if (!dev) {
IEEE80211_ERROR("Unable to network device.\n");
goto failed;
}
ieee = netdev_priv(dev);
memset(ieee, 0, sizeof(struct ieee80211_device)+sizeof_priv);
ieee->dev = dev;
err = ieee80211_networks_allocate(ieee);
if (err) {
IEEE80211_ERROR("Unable to allocate beacon storage: %d\n",
err);
goto failed;
}
ieee80211_networks_initialize(ieee);
/* Default fragmentation threshold is maximum payload size */
ieee->fts = DEFAULT_FTS;
ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
ieee->open_wep = 1;
/* Default to enabling full open WEP with host based encrypt/decrypt */
ieee->host_encrypt = 1;
ieee->host_decrypt = 1;
ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
INIT_LIST_HEAD(&ieee->crypt_deinit_list);
init_timer(&ieee->crypt_deinit_timer);
ieee->crypt_deinit_timer.data = (unsigned long)ieee;
ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler;
spin_lock_init(&ieee->lock);
spin_lock_init(&ieee->wpax_suitlist_lock);
spin_lock_init(&ieee->bw_spinlock);
spin_lock_init(&ieee->reorder_spinlock);
atomic_set(&(ieee->atm_chnlop), 0);
atomic_set(&(ieee->atm_swbw), 0);
ieee->wpax_type_set = 0;
ieee->wpa_enabled = 0;
ieee->tkip_countermeasures = 0;
ieee->drop_unencrypted = 0;
ieee->privacy_invoked = 0;
ieee->ieee802_1x = 1;
ieee->raw_tx = 0;
ieee->hwsec_active = 0; //disable hwsec, switch it on when necessary.
ieee80211_softmac_init(ieee);
ieee->pHTInfo = kzalloc(sizeof(RT_HIGH_THROUGHPUT), GFP_KERNEL);
if (ieee->pHTInfo == NULL)
{
IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't alloc memory for HTInfo\n");
return NULL;
}
HTUpdateDefaultSetting(ieee);
HTInitializeHTInfo(ieee); //may move to other place.
TSInitialize(ieee);
for (i = 0; i < IEEE_IBSS_MAC_HASH_SIZE; i++)
INIT_LIST_HEAD(&ieee->ibss_mac_hash[i]);
for (i = 0; i < 17; i++) {
ieee->last_rxseq_num[i] = -1;
ieee->last_rxfrag_num[i] = -1;
ieee->last_packet_time[i] = 0;
}
//These function were added to load crypte module autoly
ieee80211_tkip_null();
ieee80211_wep_null();
ieee80211_ccmp_null();
return dev;
failed:
if (dev)
free_netdev(dev);
return NULL;
}
