/**
* p80211_convert_to_ether - conversion from 802.11 frame to ethernet frame
* @wlandev: pointer to WLAN device
* @skb: pointer to socket buffer
*
* Returns: 0 if conversion succeeded
* CONV_TO_ETHER_FAILED if conversion failed
* CONV_TO_ETHER_SKIPPED if frame is ignored
*/
static int p80211_convert_to_ether(struct wlandevice *wlandev,
struct sk_buff *skb)
{
struct p80211_hdr_a3 *hdr;
hdr = (struct p80211_hdr_a3 *)skb->data;
if (p80211_rx_typedrop(wlandev, le16_to_cpu(hdr->fc)))
return CONV_TO_ETHER_SKIPPED;
/* perform mcast filtering: allow my local address through but reject
* anything else that isn't multicast
*/
if (wlandev->netdev->flags & IFF_ALLMULTI) {
if (!ether_addr_equal_unaligned(wlandev->netdev->dev_addr,
hdr->a1)) {
if (!is_multicast_ether_addr(hdr->a1))
return CONV_TO_ETHER_SKIPPED;
}
}
if (skb_p80211_to_ether(wlandev, wlandev->ethconv, skb) == 0) {
wlandev->netdev->stats.rx_packets++;
wlandev->netdev->stats.rx_bytes += skb->len;
netif_rx_ni(skb);
return 0;
}
netdev_dbg(wlandev->netdev, "%s failed.\n", __func__);
return CONV_TO_ETHER_FAILED;
}
/*----------------------------------------------------------------
* p80211netdev_rx_bh
*
* Deferred processing of all received frames.
*
* Arguments:
* wlandev WLAN network device structure
* skb skbuff containing a full 802.11 frame.
* Returns:
* nothing
* Side effects:
*
----------------------------------------------------------------*/
static void p80211netdev_rx_bh(unsigned long arg)
{
wlandevice_t *wlandev = (wlandevice_t *) arg;
struct sk_buff *skb = NULL;
netdevice_t *dev = wlandev->netdev;
p80211_hdr_a3_t *hdr;
UINT16 fc;
DBFENTER;
/* Let's empty our our queue */
while ( (skb = skb_dequeue(&wlandev->nsd_rxq)) ) {
if (wlandev->state == WLAN_DEVICE_OPEN) {
if (dev->type != ARPHRD_ETHER) {
/* RAW frame; we shouldn't convert it */
// XXX Append the Prism Header here instead.
/* set up various data fields */
skb->dev = dev;
skb_reset_mac_header(skb);
skb->ip_summed = CHECKSUM_NONE;
skb->pkt_type = PACKET_OTHERHOST;
skb->protocol = htons(ETH_P_80211_RAW);
dev->last_rx = jiffies;
wlandev->linux_stats.rx_packets++;
wlandev->linux_stats.rx_bytes += skb->len;
netif_rx_ni(skb);
continue;
} else {
hdr = (p80211_hdr_a3_t *)skb->data;
fc = ieee2host16(hdr->fc);
if (p80211_rx_typedrop(wlandev, fc)) {
dev_kfree_skb(skb);
continue;
}
/* perform mcast filtering */
if (wlandev->netdev->flags & IFF_ALLMULTI) {
/* allow my local address through */
if (memcmp(hdr->a1, wlandev->netdev->dev_addr, WLAN_ADDR_LEN) != 0) {
/* but reject anything else that isn't multicast */
if (!(hdr->a1[0] & 0x01)) {
dev_kfree_skb(skb);
continue;
}
}
}
if ( skb_p80211_to_ether(wlandev, wlandev->ethconv, skb) == 0 ) {
skb->dev->last_rx = jiffies;
wlandev->linux_stats.rx_packets++;
wlandev->linux_stats.rx_bytes += skb->len;
netif_rx_ni(skb);
continue;
}
WLAN_LOG_DEBUG(1, "p80211_to_ether failed.\n");
}
}
dev_kfree_skb(skb);
}
DBFEXIT;
}
