[PATCH] ieee82011: Added WE-18 support to default wireless extension handler

tree 1536f39c18756698d033da72c49300a561be1289
parent 07172d7c9f10ee3d05d6f6489ba6d6ee2628da06
author Liu Hong <hong.liu@intel.com> 1124436225 -0500
committer James Ketrenos <jketreno@linux.intel.com> 1127312664 -0500

Added WE-18 support to default wireless extension handler in ieee80211
subsystem.

Updated patch since last send to account for ieee80211_device parameter
being added to the crypto init method.
Signed-off-by: James Ketrenos <jketreno@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

include/net/ieee80211.h

@@ -447,6 +447,11 @@ struct ieee80211_device;
 #define SEC_LEVEL_2_CKIP	3	/* Level 1 + CKIP */
 #define SEC_LEVEL_3		4	/* Level 2 + CCMP */
 
+#define SEC_ALG_NONE		0
+#define SEC_ALG_WEP		1
+#define SEC_ALG_TKIP		2
+#define SEC_ALG_CCMP		3
+
 #define WEP_KEYS		4
 #define WEP_KEY_LEN		13
 #define SCM_KEY_LEN		32
@@ -456,6 +461,7 @@ struct ieee80211_security {
 	u16 active_key:2,
 	    enabled:1,
 	    auth_mode:2, auth_algo:4, unicast_uses_group:1, encrypt:1;
+	u8 encode_alg[WEP_KEYS];
 	u8 key_sizes[WEP_KEYS];
 	u8 keys[WEP_KEYS][SCM_KEY_LEN];
 	u8 level;
@@ -824,6 +830,14 @@ extern int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
 extern int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
 				   struct iw_request_info *info,
 				   union iwreq_data *wrqu, char *key);
+#if WIRELESS_EXT > 17
+extern int ieee80211_wx_set_encodeext(struct ieee80211_device *ieee,
+				      struct iw_request_info *info,
+				      union iwreq_data *wrqu, char *extra);
+extern int ieee80211_wx_get_encodeext(struct ieee80211_device *ieee,
+				      struct iw_request_info *info,
+				      union iwreq_data *wrqu, char *extra);
+#endif
 
 extern inline void ieee80211_increment_scans(struct ieee80211_device *ieee)
 {

net/ieee80211/ieee80211_wx.c

@@ -422,6 +422,7 @@ int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
 	 * TODO: When WPA is added this is one place that needs to change */
 	sec.flags |= SEC_LEVEL;
 	sec.level = SEC_LEVEL_1;	/* 40 and 104 bit WEP */
+	sec.encode_alg[key] = SEC_ALG_WEP;
 
       done:
 	if (ieee->set_security)
@@ -469,14 +470,6 @@ int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
 		return 0;
 	}
 
-	if (sec->level != SEC_LEVEL_1) {
-		/* only WEP is supported with wireless extensions, so just
-		 * report that encryption is used */
-		erq->length = 0;
-		erq->flags |= IW_ENCODE_ENABLED;
-		return 0;
-	}
-
 	len = sec->key_sizes[key];
 	memcpy(keybuf, sec->keys[key], len);
 
@@ -491,6 +484,235 @@ int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
 	return 0;
 }
 
+#if WIRELESS_EXT > 17
+int ieee80211_wx_set_encodeext(struct ieee80211_device *ieee,
+			       struct iw_request_info *info,
+			       union iwreq_data *wrqu, char *extra)
+{
+	struct net_device *dev = ieee->dev;
+	struct iw_point *encoding = &wrqu->encoding;
+	struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
+	int i, idx, ret = 0;
+	const char *alg, *module;
+	struct ieee80211_crypto_ops *ops;
+	struct ieee80211_crypt_data **crypt;
+
+	struct ieee80211_security sec = {
+		.flags = 0,
+	};
+
+	idx = encoding->flags & IW_ENCODE_INDEX;
+	if (idx) {
+		if (idx < 1 || idx > WEP_KEYS)
+			return -EINVAL;
+		idx--;
+	} else
+		idx = ieee->tx_keyidx;
+
+	if (ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY)
+		crypt = &ieee->crypt[idx];
+	else {
+		if (idx != 0)
+			return -EINVAL;
+		if (ieee->iw_mode == IW_MODE_INFRA)
+			crypt = &ieee->crypt[idx];
+		else
+			return -EINVAL;
+	}
+
+	sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
+	if ((encoding->flags & IW_ENCODE_DISABLED) ||
+	    ext->alg == IW_ENCODE_ALG_NONE) {
+		if (*crypt)
+			ieee80211_crypt_delayed_deinit(ieee, crypt);
+
+		for (i = 0; i < WEP_KEYS; i++)
+			if (ieee->crypt[i] != NULL)
+				break;
+
+		if (i == WEP_KEYS) {
+			sec.enabled = 0;
+			sec.encrypt = 0;
+			sec.level = SEC_LEVEL_0;
+			sec.flags |= SEC_LEVEL;
+		}
+		goto done;
+	}
+
+	sec.enabled = 1;
+	sec.encrypt = 1;
+
+	if (!(ieee->host_encrypt || ieee->host_decrypt))
+		goto skip_host_crypt;
+
+	switch (ext->alg) {
+	case IW_ENCODE_ALG_WEP:
+		alg = "WEP";
+		module = "ieee80211_crypt_wep";
+		break;
+	case IW_ENCODE_ALG_TKIP:
+		alg = "TKIP";
+		module = "ieee80211_crypt_tkip";
+		break;
+	case IW_ENCODE_ALG_CCMP:
+		alg = "CCMP";
+		module = "ieee80211_crypt_ccmp";
+		break;
+	default:
+		IEEE80211_DEBUG_WX("%s: unknown crypto alg %d\n",
+				   dev->name, ext->alg);
+		ret = -EINVAL;
+		goto done;
+	}
+
+	ops = ieee80211_get_crypto_ops(alg);
+	if (ops == NULL) {
+		request_module(module);
+		ops = ieee80211_get_crypto_ops(alg);
+	}
+	if (ops == NULL) {
+		IEEE80211_DEBUG_WX("%s: unknown crypto alg %d\n",
+				   dev->name, ext->alg);
+		ret = -EINVAL;
+		goto done;
+	}
+
+	if (*crypt == NULL || (*crypt)->ops != ops) {
+		struct ieee80211_crypt_data *new_crypt;
+
+		ieee80211_crypt_delayed_deinit(ieee, crypt);
+
+		new_crypt = (struct ieee80211_crypt_data *)
+		    kmalloc(sizeof(*new_crypt), GFP_KERNEL);
+		if (new_crypt == NULL) {
+			ret = -ENOMEM;
+			goto done;
+		}
+		memset(new_crypt, 0, sizeof(struct ieee80211_crypt_data));
+		new_crypt->ops = ops;
+		if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
+			new_crypt->priv = new_crypt->ops->init(ieee, idx);
+		if (new_crypt->priv == NULL) {
+			kfree(new_crypt);
+			ret = -EINVAL;
+			goto done;
+		}
+		*crypt = new_crypt;
+	}
+
+	if (ext->key_len > 0 && (*crypt)->ops->set_key &&
+	    (*crypt)->ops->set_key(ext->key, ext->key_len, ext->rx_seq,
+				   (*crypt)->priv) < 0) {
+		IEEE80211_DEBUG_WX("%s: key setting failed\n", dev->name);
+		ret = -EINVAL;
+		goto done;
+	}
+
+      skip_host_crypt:
+	if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
+		ieee->tx_keyidx = idx;
+		sec.active_key = idx;
+		sec.flags |= SEC_ACTIVE_KEY;
+	}
+
+	if (ext->alg != IW_ENCODE_ALG_NONE) {
+		memcpy(sec.keys[idx], ext->key, ext->key_len);
+		sec.key_sizes[idx] = ext->key_len;
+		sec.flags |= (1 << idx);
+		if (ext->alg == IW_ENCODE_ALG_WEP) {
+			sec.encode_alg[idx] = SEC_ALG_WEP;
+			sec.flags |= SEC_LEVEL;
+			sec.level = SEC_LEVEL_1;
+		} else if (ext->alg == IW_ENCODE_ALG_TKIP) {
+			sec.encode_alg[idx] = SEC_ALG_TKIP;
+			sec.flags |= SEC_LEVEL;
+			sec.level = SEC_LEVEL_2;
+		} else if (ext->alg == IW_ENCODE_ALG_CCMP) {
+			sec.encode_alg[idx] = SEC_ALG_CCMP;
+			sec.flags |= SEC_LEVEL;
+			sec.level = SEC_LEVEL_3;
+		}
+	}
+      done:
+	if (ieee->set_security)
+		ieee->set_security(ieee->dev, &sec);
+
+	/*
+	 * Do not reset port if card is in Managed mode since resetting will
+	 * generate new IEEE 802.11 authentication which may end up in looping
+	 * with IEEE 802.1X. If your hardware requires a reset after WEP
+	 * configuration (for example... Prism2), implement the reset_port in
+	 * the callbacks structures used to initialize the 802.11 stack.
+	 */
+	if (ieee->reset_on_keychange &&
+	    ieee->iw_mode != IW_MODE_INFRA &&
+	    ieee->reset_port && ieee->reset_port(dev)) {
+		IEEE80211_DEBUG_WX("%s: reset_port failed\n", dev->name);
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+int ieee80211_wx_get_encodeext(struct ieee80211_device *ieee,
+			       struct iw_request_info *info,
+			       union iwreq_data *wrqu, char *extra)
+{
+	struct iw_point *encoding = &wrqu->encoding;
+	struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
+	struct ieee80211_security *sec = &ieee->sec;
+	int idx, max_key_len;
+
+	max_key_len = encoding->length - sizeof(*ext);
+	if (max_key_len < 0)
+		return -EINVAL;
+
+	idx = encoding->flags & IW_ENCODE_INDEX;
+	if (idx) {
+		if (idx < 1 || idx > WEP_KEYS)
+			return -EINVAL;
+		idx--;
+	} else
+		idx = ieee->tx_keyidx;
+
+	if (!ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY)
+		if (idx != 0 || ieee->iw_mode != IW_MODE_INFRA)
+			return -EINVAL;
+
+	encoding->flags = idx + 1;
+	memset(ext, 0, sizeof(*ext));
+
+	if (!sec->enabled) {
+		ext->alg = IW_ENCODE_ALG_NONE;
+		ext->key_len = 0;
+		encoding->flags |= IW_ENCODE_DISABLED;
+	} else {
+		if (sec->encode_alg[idx] == SEC_ALG_WEP)
+			ext->alg = IW_ENCODE_ALG_WEP;
+		else if (sec->encode_alg[idx] == SEC_ALG_TKIP)
+			ext->alg = IW_ENCODE_ALG_TKIP;
+		else if (sec->encode_alg[idx] == SEC_ALG_CCMP)
+			ext->alg = IW_ENCODE_ALG_CCMP;
+		else
+			return -EINVAL;
+
+		ext->key_len = sec->key_sizes[idx];
+		memcpy(ext->key, sec->keys[idx], ext->key_len);
+		encoding->flags |= IW_ENCODE_ENABLED;
+		if (ext->key_len &&
+		    (ext->alg == IW_ENCODE_ALG_TKIP ||
+		     ext->alg == IW_ENCODE_ALG_CCMP))
+			ext->ext_flags |= IW_ENCODE_EXT_TX_SEQ_VALID;
+
+	}
+
+	return 0;
+}
+
+EXPORT_SYMBOL(ieee80211_wx_set_encodeext);
+EXPORT_SYMBOL(ieee80211_wx_get_encodeext);
+#endif
+
 EXPORT_SYMBOL(ieee80211_wx_get_scan);
 EXPORT_SYMBOL(ieee80211_wx_set_encode);
 EXPORT_SYMBOL(ieee80211_wx_get_encode);