161 lines
4.7 KiB
Diff
161 lines
4.7 KiB
Diff
Subject: mac80211: support getting key sequence counters via cfg80211
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This implements cfg80211's get_key() to allow retrieving the sequence
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counter for a TKIP or CCMP key from userspace. It also cleans up and
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documents the associated low-level driver interface.
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Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
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---
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include/net/mac80211.h | 14 ++------
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net/mac80211/cfg.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++-
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2 files changed, 89 insertions(+), 10 deletions(-)
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Index: mac80211/net/mac80211/cfg.c
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===================================================================
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--- mac80211.orig/net/mac80211/cfg.c 2007-11-11 15:46:41.497954646 +0100
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+++ mac80211/net/mac80211/cfg.c 2007-11-11 15:46:51.346515884 +0100
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@@ -1,7 +1,7 @@
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/*
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* mac80211 configuration hooks for cfg80211
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*
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- * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
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+ * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
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*
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* This file is GPLv2 as found in COPYING.
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*/
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@@ -180,6 +180,88 @@
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return 0;
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}
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+static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
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+ u8 key_idx, u8 *mac_addr, void *cookie,
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+ void (*callback)(void *cookie,
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+ struct key_params *params))
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+{
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+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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+ struct sta_info *sta = NULL;
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+ u8 seq[6] = {0};
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+ struct key_params params;
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+ struct ieee80211_key *key;
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+ u32 iv32;
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+ u16 iv16;
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+ int err = -ENOENT;
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+
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+ if (mac_addr) {
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+ sta = sta_info_get(sdata->local, mac_addr);
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+ if (!sta)
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+ goto out;
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+
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+ key = sta->key;
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+ } else
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+ key = sdata->keys[key_idx];
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+
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+ if (!key)
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+ goto out;
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+
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+ memset(¶ms, 0, sizeof(params));
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+
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+ switch (key->conf.alg) {
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+ case ALG_TKIP:
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+ params.cipher = WLAN_CIPHER_SUITE_TKIP;
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+
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+ iv32 = key->u.tkip.iv32;
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+ iv16 = key->u.tkip.iv16;
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+
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+ if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
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+ sdata->local->ops->get_tkip_seq)
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+ sdata->local->ops->get_tkip_seq(
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+ local_to_hw(sdata->local),
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+ key->conf.hw_key_idx,
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+ &iv32, &iv16);
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+
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+ seq[0] = iv16 & 0xff;
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+ seq[1] = (iv16 >> 8) & 0xff;
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+ seq[2] = iv32 & 0xff;
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+ seq[3] = (iv32 >> 8) & 0xff;
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+ seq[4] = (iv32 >> 16) & 0xff;
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+ seq[5] = (iv32 >> 24) & 0xff;
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+ params.seq = seq;
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+ params.seq_len = 6;
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+ break;
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+ case ALG_CCMP:
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+ params.cipher = WLAN_CIPHER_SUITE_CCMP;
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+ seq[0] = key->u.ccmp.tx_pn[5];
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+ seq[1] = key->u.ccmp.tx_pn[4];
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+ seq[2] = key->u.ccmp.tx_pn[3];
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+ seq[3] = key->u.ccmp.tx_pn[2];
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+ seq[4] = key->u.ccmp.tx_pn[1];
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+ seq[5] = key->u.ccmp.tx_pn[0];
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+ params.seq = seq;
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+ params.seq_len = 6;
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+ break;
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+ case ALG_WEP:
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+ if (key->conf.keylen == 5)
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+ params.cipher = WLAN_CIPHER_SUITE_WEP40;
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+ else
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+ params.cipher = WLAN_CIPHER_SUITE_WEP104;
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+ break;
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+ }
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+
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+ params.key = key->conf.key;
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+ params.key_len = key->conf.keylen;
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+
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+ callback(cookie, ¶ms);
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+ err = 0;
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+
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+ out:
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+ if (sta)
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+ sta_info_put(sta);
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+ return err;
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+}
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+
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static int ieee80211_config_default_key(struct wiphy *wiphy,
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struct net_device *dev,
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u8 key_idx)
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@@ -198,5 +280,6 @@
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.change_virtual_intf = ieee80211_change_iface,
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.add_key = ieee80211_add_key,
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.del_key = ieee80211_del_key,
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+ .get_key = ieee80211_get_key,
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.set_default_key = ieee80211_config_default_key,
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};
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Index: mac80211/include/net/mac80211.h
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===================================================================
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--- mac80211.orig/include/net/mac80211.h 2007-11-11 15:46:41.377947807 +0100
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+++ mac80211/include/net/mac80211.h 2007-11-11 15:47:08.183475366 +0100
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@@ -598,9 +598,6 @@
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u8 key[0];
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};
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-#define IEEE80211_SEQ_COUNTER_RX 0
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-#define IEEE80211_SEQ_COUNTER_TX 1
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-
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/**
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* enum set_key_cmd - key command
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*
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@@ -947,9 +944,9 @@
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*
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* @get_stats: return low-level statistics
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*
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- * @get_sequence_counter: For devices that have internal sequence counters this
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- * callback allows mac80211 to access the current value of a counter.
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- * This callback seems not well-defined, tell us if you need it.
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+ * @get_tkip_seq: If your device implements TKIP encryption in hardware this
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+ * callback should be provided to read the TKIP transmit IVs (both IV32
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+ * and IV16) for the given key from hardware.
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*
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* @set_rts_threshold: Configuration of RTS threshold (if device needs it)
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*
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@@ -1022,9 +1019,8 @@
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int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len);
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int (*get_stats)(struct ieee80211_hw *hw,
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struct ieee80211_low_level_stats *stats);
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- int (*get_sequence_counter)(struct ieee80211_hw *hw,
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- u8* addr, u8 keyidx, u8 txrx,
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- u32* iv32, u16* iv16);
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+ void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx,
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+ u32 *iv32, u16 *iv16);
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int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);
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int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
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int (*set_retry_limit)(struct ieee80211_hw *hw,
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