/*----------------------------------------------------------------
* prism2sta_txframe
*
* Takes a frame from p80211 and queues it for transmission.
*
* Arguments:
* wlandev wlan device structure
* pb packet buffer struct. Contains an 802.11
* data frame.
* p80211_hdr points to the 802.11 header for the packet.
* Returns:
* 0 Success and more buffs available
* 1 Success but no more buffs
* 2 Allocation failure
* 4 Buffer full or queue busy
*
* Side effects:
*
* Call context:
* process thread
----------------------------------------------------------------*/
static int prism2sta_txframe(wlandevice_t *wlandev, struct sk_buff *skb,
p80211_hdr_t *p80211_hdr,
p80211_metawep_t *p80211_wep)
{
hfa384x_t *hw = (hfa384x_t *) wlandev->priv;
int result;
/* If necessary, set the 802.11 WEP bit */
if ((wlandev->hostwep & (HOSTWEP_PRIVACYINVOKED | HOSTWEP_ENCRYPT)) ==
HOSTWEP_PRIVACYINVOKED) {
p80211_hdr->a3.fc |= cpu_to_le16(WLAN_SET_FC_ISWEP(1));
}
result = hfa384x_drvr_txframe(hw, skb, p80211_hdr, p80211_wep);
return result;
}
/*----------------------------------------------------------------
* p80211pb_ether_to_80211
*
* Uses the contents of the ether frame and the etherconv setting
* to build the elements of the 802.11 frame.
*
* We don't actually set
* up the frame header here. That's the MAC's job. We're only handling
* conversion of DIXII or 802.3+LLC frames to something that works
* with 802.11.
*
* Note -- 802.11 header is NOT part of the skb. Likewise, the 802.11
* FCS is also not present and will need to be added elsewhere.
*
* Arguments:
* ethconv Conversion type to perform
* skb skbuff containing the ether frame
* p80211_hdr 802.11 header
*
* Returns:
* 0 on success, non-zero otherwise
*
* Call context:
* May be called in interrupt or non-interrupt context
----------------------------------------------------------------*/
int skb_ether_to_p80211(wlandevice_t *wlandev, u32 ethconv,
struct sk_buff *skb, union p80211_hdr *p80211_hdr,
struct p80211_metawep *p80211_wep)
{
u16 fc;
u16 proto;
struct wlan_ethhdr e_hdr;
struct wlan_llc *e_llc;
struct wlan_snap *e_snap;
int foo;
memcpy(&e_hdr, skb->data, sizeof(e_hdr));
if (skb->len <= 0) {
pr_debug("zero-length skb!\n");
return 1;
}
if (ethconv == WLAN_ETHCONV_ENCAP) { /* simplest case */
pr_debug("ENCAP len: %d\n", skb->len);
/* here, we don't care what kind of ether frm. Just stick it */
/* in the 80211 payload */
/* which is to say, leave the skb alone. */
} else {
/* step 1: classify ether frame, DIX or 802.3? */
proto = ntohs(e_hdr.type);
if (proto <= 1500) {
pr_debug("802.3 len: %d\n", skb->len);
/* codes <= 1500 reserved for 802.3 lengths */
/* it's 802.3, pass ether payload unchanged, */
/* trim off ethernet header */
skb_pull(skb, WLAN_ETHHDR_LEN);
/* leave off any PAD octets. */
skb_trim(skb, proto);
} else {
pr_debug("DIXII len: %d\n", skb->len);
/* it's DIXII, time for some conversion */
/* trim off ethernet header */
skb_pull(skb, WLAN_ETHHDR_LEN);
/* tack on SNAP */
e_snap =
(struct wlan_snap *) skb_push(skb,
sizeof(struct wlan_snap));
e_snap->type = htons(proto);
if (ethconv == WLAN_ETHCONV_8021h
&& p80211_stt_findproto(proto)) {
memcpy(e_snap->oui, oui_8021h,
WLAN_IEEE_OUI_LEN);
} else {
memcpy(e_snap->oui, oui_rfc1042,
WLAN_IEEE_OUI_LEN);
}
/* tack on llc */
e_llc =
(struct wlan_llc *) skb_push(skb,
sizeof(struct wlan_llc));
e_llc->dsap = 0xAA; /* SNAP, see IEEE 802 */
e_llc->ssap = 0xAA;
e_llc->ctl = 0x03;
}
}
/* Set up the 802.11 header */
/* It's a data frame */
fc = cpu_to_le16(WLAN_SET_FC_FTYPE(WLAN_FTYPE_DATA) |
WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_DATAONLY));
switch (wlandev->macmode) {
case WLAN_MACMODE_IBSS_STA:
memcpy(p80211_hdr->a3.a1, &e_hdr.daddr, ETH_ALEN);
memcpy(p80211_hdr->a3.a2, wlandev->netdev->dev_addr, ETH_ALEN);
memcpy(p80211_hdr->a3.a3, wlandev->bssid, ETH_ALEN);
break;
case WLAN_MACMODE_ESS_STA:
fc |= cpu_to_le16(WLAN_SET_FC_TODS(1));
memcpy(p80211_hdr->a3.a1, wlandev->bssid, ETH_ALEN);
memcpy(p80211_hdr->a3.a2, wlandev->netdev->dev_addr, ETH_ALEN);
memcpy(p80211_hdr->a3.a3, &e_hdr.daddr, ETH_ALEN);
break;
case WLAN_MACMODE_ESS_AP:
fc |= cpu_to_le16(WLAN_SET_FC_FROMDS(1));
memcpy(p80211_hdr->a3.a1, &e_hdr.daddr, ETH_ALEN);
memcpy(p80211_hdr->a3.a2, wlandev->bssid, ETH_ALEN);
memcpy(p80211_hdr->a3.a3, &e_hdr.saddr, ETH_ALEN);
break;
default:
// printk(KERN_ERR
;
return 1;
break;
}
p80211_wep->data = NULL;
if ((wlandev->hostwep & HOSTWEP_PRIVACYINVOKED)
&& (wlandev->hostwep & HOSTWEP_ENCRYPT)) {
/* XXXX need to pick keynum other than default? */
p80211_wep->data = kmalloc(skb->len, GFP_ATOMIC);
foo = wep_encrypt(wlandev, skb->data, p80211_wep->data,
skb->len,
(wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK),
p80211_wep->iv, p80211_wep->icv);
if (foo) {
// printk(KERN_WARNING
// "Host en-WEP failed, dropping frame (%d).\n",
;
return 2;
}
fc |= cpu_to_le16(WLAN_SET_FC_ISWEP(1));
}
/* skb->nh.raw = skb->data; */
p80211_hdr->a3.fc = fc;
p80211_hdr->a3.dur = 0;
p80211_hdr->a3.seq = 0;
return 0;
}
