iwlwifi: default WEP HW encryption

This patch adds HW encryption support in default WEP mode.
When no key mapping key/pairwise key is used. The key is broadcast key
is used as default/global/static key.
This code assumes that group cast key is added after pairwise key.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 119 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c
new file mode 100644
index 000000000000..a48e228e2ffd
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.c
@@ -0,0 +1,119 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
+ *
+ * Portions of this file are derived from the ipw3945 project, as well
+ * as portions of the ieee80211 subsystem header files.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ * James P. Ketrenos <ipw2100-admin@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ *****************************************************************************/
+
+#include <net/mac80211.h>
+
+#include "iwl-eeprom.h"
+#include "iwl-4965.h"
+#include "iwl-core.h"
+#include "iwl-sta.h"
+#include "iwl-io.h"
+#include "iwl-helpers.h"
+
+int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
+{
+        int i, not_empty = 0;
+        u8 buff[sizeof(struct iwl_wep_cmd) +
+                sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
+        struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
+        size_t cmd_size  = sizeof(struct iwl_wep_cmd);
+        struct iwl_host_cmd cmd = {
+                .id = REPLY_WEPKEY,
+                .data = wep_cmd,
+                .meta.flags = CMD_ASYNC,
+        };
+
+        memset(wep_cmd, 0, cmd_size +
+                        (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
+
+        for (i = 0; i < WEP_KEYS_MAX ; i++) {
+                wep_cmd->key[i].key_index = i;
+                if (priv->wep_keys[i].key_size) {
+                        wep_cmd->key[i].key_offset = i;
+                        not_empty = 1;
+                } else {
+                        wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
+                }
+
+                wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
+                memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
+                                priv->wep_keys[i].key_size);
+        }
+
+        wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
+        wep_cmd->num_keys = WEP_KEYS_MAX;
+
+        cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
+
+        cmd.len = cmd_size;
+
+        if (not_empty || send_if_empty)
+                return iwl_send_cmd(priv, &cmd);
+        else
+                return 0;
+}
+
+int iwl_remove_default_wep_key(struct iwl_priv *priv,
+                               struct ieee80211_key_conf *key)
+{
+        int ret;
+        unsigned long flags;
+
+        spin_lock_irqsave(&priv->sta_lock, flags);
+        priv->default_wep_key--;
+        memset(&priv->wep_keys[key->keyidx], 0, sizeof(priv->wep_keys[0]));
+        ret = iwl_send_static_wepkey_cmd(priv, 1);
+        spin_unlock_irqrestore(&priv->sta_lock, flags);
+
+        return ret;
+}
+
+int iwl_set_default_wep_key(struct iwl_priv *priv,
+                            struct ieee80211_key_conf *keyconf)
+{
+        int ret;
+        unsigned long flags;
+
+        keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
+        keyconf->hw_key_idx = keyconf->keyidx;
+        priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
+
+        spin_lock_irqsave(&priv->sta_lock, flags);
+        priv->default_wep_key++;
+
+        priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
+        memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
+                                                        keyconf->keylen);
+
+        ret = iwl_send_static_wepkey_cmd(priv, 0);
+        spin_unlock_irqrestore(&priv->sta_lock, flags);
+
+        return ret;
+}
+