hostap.c

IEEE 802.11a/b/g linux2.4/2.6 驱动程序源代码

		return HFA384X_PORTTYPE_BSS;
	if (local->iw_mode == IW_MODE_REPEAT)
		return HFA384X_PORTTYPE_WDS;
	if (local->iw_mode == IW_MODE_MONITOR)
		return HFA384X_PORTTYPE_PSEUDO_IBSS;
	return HFA384X_PORTTYPE_HOSTAP;
}


int hostap_set_encryption(local_info_t *local)
{
	u16 val, old_val;
	int i, keylen, len, idx;
	char keybuf[WEP_KEY_LEN + 1];
	enum { NONE, WEP, OTHER } encrypt_type;

	idx = local->tx_keyidx;
	if (local->crypt[idx] == NULL || local->crypt[idx]->ops == NULL)
		encrypt_type = NONE;
	else if (strcmp(local->crypt[idx]->ops->name, "WEP") == 0)
		encrypt_type = WEP;
	else
		encrypt_type = OTHER;

	if (local->func->get_rid(local->dev, HFA384X_RID_CNFWEPFLAGS, &val, 2,
				 1) < 0) {
		printk(KERN_DEBUG "Could not read current WEP flags.\n");
		goto fail;
	}
	le16_to_cpus(&val);
	old_val = val;

	if (encrypt_type != NONE || local->privacy_invoked)
		val |= HFA384X_WEPFLAGS_PRIVACYINVOKED;
	else
		val &= ~HFA384X_WEPFLAGS_PRIVACYINVOKED;

	if (local->open_wep || encrypt_type == NONE ||
	    ((local->ieee_802_1x || local->wpa) && local->host_decrypt))
		val &= ~HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
	else
		val |= HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;

	if ((encrypt_type != NONE || local->privacy_invoked) &&
	    (encrypt_type == OTHER || local->host_encrypt))
		val |= HFA384X_WEPFLAGS_HOSTENCRYPT;
	else
		val &= ~HFA384X_WEPFLAGS_HOSTENCRYPT;
	if ((encrypt_type != NONE || local->privacy_invoked) &&
	    (encrypt_type == OTHER || local->host_decrypt))
		val |= HFA384X_WEPFLAGS_HOSTDECRYPT;
	else
		val &= ~HFA384X_WEPFLAGS_HOSTDECRYPT;

	if (val != old_val &&
	    hostap_set_word(local->dev, HFA384X_RID_CNFWEPFLAGS, val)) {
		printk(KERN_DEBUG "Could not write new WEP flags (0x%x)\n",
		       val);
		goto fail;
	}

	if (encrypt_type != WEP)
		return 0;

	/* 104-bit support seems to require that all the keys are set to the
	 * same keylen */
	keylen = 6; /* first 5 octets */
	len = local->crypt[idx]->ops->get_key(keybuf, sizeof(keybuf),
					      NULL, local->crypt[idx]->priv);
	if (idx >= 0 && idx < WEP_KEYS && len > 5)
		keylen = WEP_KEY_LEN + 1; /* first 13 octets */

	for (i = 0; i < WEP_KEYS; i++) {
		memset(keybuf, 0, sizeof(keybuf));
		if (local->crypt[i]) {
			(void) local->crypt[i]->ops->get_key(
				keybuf, sizeof(keybuf),
				NULL, local->crypt[i]->priv);
		}
		if (local->func->set_rid(local->dev,
					 HFA384X_RID_CNFDEFAULTKEY0 + i,
					 keybuf, keylen)) {
			printk(KERN_DEBUG "Could not set key %d (len=%d)\n",
			       i, keylen);
			goto fail;
		}
	}
	if (hostap_set_word(local->dev, HFA384X_RID_CNFWEPDEFAULTKEYID, idx)) {
		printk(KERN_DEBUG "Could not set default keyid %d\n", idx);
		goto fail;
	}

	return 0;

 fail:
	printk(KERN_DEBUG "%s: encryption setup failed\n", local->dev->name);
	return -1;
}


int hostap_set_antsel(local_info_t *local)
{
	u16 val;
	int ret = 0;

	if (local->antsel_tx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
	    local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
			     HFA386X_CR_TX_CONFIGURE,
			     NULL, &val) == 0) {
		val &= ~(BIT(2) | BIT(1));
		switch (local->antsel_tx) {
		case HOSTAP_ANTSEL_DIVERSITY:
			val |= BIT(1);
			break;
		case HOSTAP_ANTSEL_LOW:
			break;
		case HOSTAP_ANTSEL_HIGH:
			val |= BIT(2);
			break;
		}

		if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
				     HFA386X_CR_TX_CONFIGURE, &val, NULL)) {
			printk(KERN_INFO "%s: setting TX AntSel failed\n",
			       local->dev->name);
			ret = -1;
		}
	}

	if (local->antsel_rx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
	    local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
			     HFA386X_CR_RX_CONFIGURE,
			     NULL, &val) == 0) {
		val &= ~(BIT(1) | BIT(0));
		switch (local->antsel_rx) {
		case HOSTAP_ANTSEL_DIVERSITY:
			break;
		case HOSTAP_ANTSEL_LOW:
			val |= BIT(0);
			break;
		case HOSTAP_ANTSEL_HIGH:
			val |= BIT(0) | BIT(1);
			break;
		}

		if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
				     HFA386X_CR_RX_CONFIGURE, &val, NULL)) {
			printk(KERN_INFO "%s: setting RX AntSel failed\n",
			       local->dev->name);
			ret = -1;
		}
	}

	return ret;
}


int hostap_set_roaming(local_info_t *local)
{
	u16 val;

	switch (local->host_roaming) {
	case 1:
		val = HFA384X_ROAMING_HOST;
		break;
	case 2:
		val = HFA384X_ROAMING_DISABLED;
		break;
	case 0:
	default:
		val = HFA384X_ROAMING_FIRMWARE;
		break;
	}

	return hostap_set_word(local->dev, HFA384X_RID_CNFROAMINGMODE, val);
}


int hostap_set_auth_algs(local_info_t *local)
{
	int val = local->auth_algs;
	/* At least STA f/w v0.6.2 seems to have issues with cnfAuthentication
	 * set to include both Open and Shared Key flags. It tries to use
	 * Shared Key authentication in that case even if WEP keys are not
	 * configured.. STA f/w v0.7.6 is able to handle such configuration,
	 * but it is unknown when this was fixed between 0.6.2 .. 0.7.6. */
	if (local->sta_fw_ver < PRISM2_FW_VER(0,7,0) &&
	    val != PRISM2_AUTH_OPEN && val != PRISM2_AUTH_SHARED_KEY)
		val = PRISM2_AUTH_OPEN;

	if (hostap_set_word(local->dev, HFA384X_RID_CNFAUTHENTICATION, val)) {
		printk(KERN_INFO "%s: cnfAuthentication setting to 0x%x "
		       "failed\n", local->dev->name, local->auth_algs);
		return -EINVAL;
	}

	return 0;
}


void hostap_dump_rx_header(const char *name, const struct hfa384x_rx_frame *rx)
{
	u16 status, fc;

	status = __le16_to_cpu(rx->status);

	printk(KERN_DEBUG "%s: RX status=0x%04x (port=%d, type=%d, "
	       "fcserr=%d) silence=%d signal=%d rate=%d rxflow=%d; "
	       "jiffies=%ld\n",
	       name, status, (status >> 8) & 0x07, status >> 13, status & 1,
	       rx->silence, rx->signal, rx->rate, rx->rxflow, jiffies);

	fc = __le16_to_cpu(rx->frame_control);
	printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
	       "data_len=%d%s%s\n",
	       fc, WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc),
	       __le16_to_cpu(rx->duration_id), __le16_to_cpu(rx->seq_ctrl),
	       __le16_to_cpu(rx->data_len),
	       fc & WLAN_FC_TODS ? " [ToDS]" : "",
	       fc & WLAN_FC_FROMDS ? " [FromDS]" : "");

	printk(KERN_DEBUG "   A1=" MACSTR " A2=" MACSTR " A3=" MACSTR " A4="
	       MACSTR "\n",
	       MAC2STR(rx->addr1), MAC2STR(rx->addr2), MAC2STR(rx->addr3),
	       MAC2STR(rx->addr4));

	printk(KERN_DEBUG "   dst=" MACSTR " src=" MACSTR " len=%d\n",
	       MAC2STR(rx->dst_addr), MAC2STR(rx->src_addr),
	       __be16_to_cpu(rx->len));
}


void hostap_dump_tx_header(const char *name, const struct hfa384x_tx_frame *tx)
{
	u16 fc;

	printk(KERN_DEBUG "%s: TX status=0x%04x retry_count=%d tx_rate=%d "
	       "tx_control=0x%04x; jiffies=%ld\n",
	       name, __le16_to_cpu(tx->status), tx->retry_count, tx->tx_rate,
	       __le16_to_cpu(tx->tx_control), jiffies);

	fc = __le16_to_cpu(tx->frame_control);
	printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
	       "data_len=%d%s%s\n",
	       fc, WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc),
	       __le16_to_cpu(tx->duration_id), __le16_to_cpu(tx->seq_ctrl),
	       __le16_to_cpu(tx->data_len),
	       fc & WLAN_FC_TODS ? " [ToDS]" : "",
	       fc & WLAN_FC_FROMDS ? " [FromDS]" : "");

	printk(KERN_DEBUG "   A1=" MACSTR " A2=" MACSTR " A3=" MACSTR " A4="
	       MACSTR "\n",
	       MAC2STR(tx->addr1), MAC2STR(tx->addr2), MAC2STR(tx->addr3),
	       MAC2STR(tx->addr4));

	printk(KERN_DEBUG "   dst=" MACSTR " src=" MACSTR " len=%d\n",
	       MAC2STR(tx->dst_addr), MAC2STR(tx->src_addr),
	       __be16_to_cpu(tx->len));
}


int hostap_80211_header_parse(struct sk_buff *skb, unsigned char *haddr)
{
	memcpy(haddr, skb->mac.raw + 10, ETH_ALEN); /* addr2 */
	return ETH_ALEN;
}


int hostap_80211_prism_header_parse(struct sk_buff *skb, unsigned char *haddr)
{
	if (*(u32 *)skb->mac.raw == LWNG_CAP_DID_BASE) {
		memcpy(haddr, skb->mac.raw +
		       sizeof(struct linux_wlan_ng_prism_hdr) + 10,
		       ETH_ALEN); /* addr2 */
	} else { /* (*(u32 *)skb->mac.raw == htonl(LWNG_CAPHDR_VERSION)) */
		memcpy(haddr, skb->mac.raw +
		       sizeof(struct linux_wlan_ng_cap_hdr) + 10,
		       ETH_ALEN); /* addr2 */
	}
	return ETH_ALEN;
}


int hostap_80211_get_hdrlen(u16 fc)
{
	int hdrlen = 24;

	switch (WLAN_FC_GET_TYPE(fc)) {
	case WLAN_FC_TYPE_DATA:
		if ((fc & WLAN_FC_FROMDS) && (fc & WLAN_FC_TODS))
			hdrlen = 30; /* Addr4 */
		break;
	case WLAN_FC_TYPE_CTRL:
		switch (WLAN_FC_GET_STYPE(fc)) {
		case WLAN_FC_STYPE_CTS:
		case WLAN_FC_STYPE_ACK:
			hdrlen = 10;
			break;
		default:
			hdrlen = 16;
			break;
		}
		break;
	}

	return hdrlen;
}


struct net_device_stats *hostap_get_stats(struct net_device *dev)
{
	struct hostap_interface *iface = dev->priv;
	return &iface->stats;
}


static int prism2_close(struct net_device *dev)
{
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;

	PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);

	if (dev == local->ddev) {
		prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
	}
#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
	if (!local->hostapd && dev == local->dev &&
	    (!local->func->card_present || local->func->card_present(local)) &&
	    local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
		hostap_deauth_all_stas(dev, local->ap, 1);
#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */

	if (local->func->dev_close && local->func->dev_close(local))
		return 0;

	if (dev == local->dev) {
		local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
	}

	if (netif_running(dev)) {
		netif_stop_queue(dev);
		netif_device_detach(dev);
	}

	flush_scheduled_work();

#ifdef NEW_MODULE_CODE
	module_put(local->hw_module);
#elif MODULE
	__MOD_DEC_USE_COUNT(local->hw_module);
#endif

	local->num_dev_open--;

	if (dev != local->dev && local->dev->flags & IFF_UP &&
	    local->master_dev_auto_open && local->num_dev_open == 1) {
		/* Close master radio interface automatically if it was also
		 * opened automatically and we are now closing the last
		 * remaining non-master device. */
		dev_close(local->dev);
	}

	return 0;
}


static int prism2_open(struct net_device *dev)
{
	struct hostap_interface *iface = dev->priv;
	local_info_t *local = iface->local;

	PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);

	if (local->no_pri) {
		printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
		       "f/w\n", dev->name);
		return 1;
	}

	if ((local->func->card_present && !local->func->card_present(local)) ||
	    local->hw_downloading)
		return -ENODEV;

	if (local->func->dev_open && local->func->dev_open(local))
		return 1;

#ifdef NEW_MODULE_CODE
	if (!try_module_get(local->hw_module))
		return -ENODEV;
#elif MODULE
	__MOD_INC_USE_COUNT(local->hw_module);
#endif
	local->num_dev_open++;

	if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
		printk(KERN_WARNING "%s: could not enable MAC port\n",
		       dev->name);
		prism2_close(dev);
		return 1;
	}
	if (!local->dev_enabled)
		prism2_callback(local, PRISM2_CALLBACK_ENABLE);
	local->dev_enabled = 1;

	if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
		/* Master radio interface is needed for all operation, so open
		 * it automatically when any virtual net_device is opened. */
		local->master_dev_auto_open = 1;
		dev_open(local->dev);
	}