/*---------------------------------------------------------------- * 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; }