[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>

2 files changed, 244 insertions, 8 deletions

diff --git a/include/net/ieee80211.h b/include/net/ieee80211.h
index c7ab7cd9de13..dfc5d65cc6c1 100644
--- a/include/net/ieee80211.h
+++ b/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)
 {
diff --git a/net/ieee80211/ieee80211_wx.c b/net/ieee80211/ieee80211_wx.c
index 49afea7989d0..db66217699d5 100644
--- a/net/ieee80211/ieee80211_wx.c
+++ b/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);