This is an interface to set, delete and flush PMKIDs through nl80211.
Main users would be fullmac devices which firmwares are capable of generating
the RSN IEs for the re-association requests, e.g. iwmc3200wifi.
Signed-off-by: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
---
include/linux/ieee80211.h | 2 +
include/linux/nl80211.h | 6 ++
include/net/cfg80211.h | 26 ++++++++++
net/wireless/nl80211.c | 117 +++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 151 insertions(+), 0 deletions(-)
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index afa8e0a..d9724a2 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -1266,6 +1266,8 @@ enum ieee80211_sa_query_action {
#define WLAN_MAX_KEY_LEN 32
+#define WLAN_PMKID_LEN 16
+
/**
* ieee80211_get_qos_ctl - get pointer to qos control bytes
* @hdr: the frame
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 45db17f..3b85d76 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -349,6 +349,10 @@ enum nl80211_commands {
NL80211_CMD_GET_SURVEY,
NL80211_CMD_NEW_SURVEY_RESULTS,
+ NL80211_CMD_SET_PMKSA,
+ NL80211_CMD_DEL_PMKSA,
+ NL80211_CMD_FLUSH_PMKSA,
+
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
@@ -732,6 +736,8 @@ enum nl80211_attrs {
NL80211_ATTR_SURVEY_INFO,
+ NL80211_ATTR_PMKID,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index a6492e9..6211372 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -871,6 +871,19 @@ struct cfg80211_bitrate_mask {
u32 fixed; /* fixed bitrate, 0 == not fixed */
u32 maxrate; /* in kbps, 0 == no limit */
};
+/**
+ * struct cfg80211_pmksa - PMK Security Association
+ *
+ * This structure is passed to the set/del_pmksa() method for PMKSA
+ * caching.
+ *
+ * @bssid: The AP's BSSID.
+ * @pmkid: The PMK material itself.
+ */
+struct cfg80211_pmksa {
+ u8 *bssid;
+ u8 *pmkid;
+};
/**
* struct cfg80211_ops - backend description for wireless configuration
@@ -976,6 +989,13 @@ struct cfg80211_bitrate_mask {
* @dump_survey: get site survey information.
*
* @testmode_cmd: run a test mode command
+ *
+ * @set_pmksa: Cache a PMKID for a BSSID. This is mostly useful for fullmac
+ * devices running firmwares capable of generating the (re) association
+ * RSN IE. It allows for faster roaming between WPA2 BSSIDs.
+ * @del_pmksa: Delete a cached PMKID.
+ * @flush_pmksa: Flush all cached PMKIDs.
+ *
*/
struct cfg80211_ops {
int (*suspend)(struct wiphy *wiphy);
@@ -1097,6 +1117,12 @@ struct cfg80211_ops {
int (*dump_survey)(struct wiphy *wiphy, struct net_device *netdev,
int idx, struct survey_info *info);
+ int (*set_pmksa)(struct wiphy *wiphy, struct net_device *netdev,
+ struct cfg80211_pmksa *pmksa);
+ int (*del_pmksa)(struct wiphy *wiphy, struct net_device *netdev,
+ struct cfg80211_pmksa *pmksa);
+ int (*flush_pmksa)(struct wiphy *wiphy, struct net_device *netdev);
+
/* some temporary stuff to finish wext */
int (*set_power_mgmt)(struct wiphy *wiphy, struct net_device *dev,
bool enabled, int timeout);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 149539a..e3be689 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -139,6 +139,8 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
[NL80211_ATTR_PID] = { .type = NLA_U32 },
[NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
+ [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
+ .len = WLAN_PMKID_LEN },
};
/* policy for the attributes */
@@ -561,6 +563,9 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
CMD(deauth, DEAUTHENTICATE);
CMD(disassoc, DISASSOCIATE);
CMD(join_ibss, JOIN_IBSS);
+ CMD(set_pmksa, SET_PMKSA);
+ CMD(del_pmksa, DEL_PMKSA);
+ CMD(flush_pmksa, FLUSH_PMKSA);
if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
i++;
NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
@@ -4221,6 +4226,99 @@ static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
return err;
}
+static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev;
+ int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
+ struct cfg80211_pmksa *pmksa) = NULL;
+ int err;
+ struct net_device *dev;
+ struct cfg80211_pmksa pmksa;
+
+ memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
+
+ if (!info->attrs[NL80211_ATTR_MAC])
+ return -EINVAL;
+
+ if (!info->attrs[NL80211_ATTR_PMKID])
+ return -EINVAL;
+
+ rtnl_lock();
+
+ err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
+ if (err)
+ goto out_rtnl;
+
+ pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
+ pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
+
+ if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ switch (info->genlhdr->cmd) {
+ case NL80211_CMD_SET_PMKSA:
+ rdev_ops = rdev->ops->set_pmksa;
+ break;
+ case NL80211_CMD_DEL_PMKSA:
+ rdev_ops = rdev->ops->del_pmksa;
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+
+ if (!rdev_ops) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ err = rdev_ops(&rdev->wiphy, dev, &pmksa);
+
+ out:
+ cfg80211_unlock_rdev(rdev);
+ dev_put(dev);
+ out_rtnl:
+ rtnl_unlock();
+
+ return err;
+}
+
+static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev;
+ int err;
+ struct net_device *dev;
+
+ rtnl_lock();
+
+ err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
+ if (err)
+ goto out_rtnl;
+
+ if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (!rdev->ops->flush_pmksa) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ err = rdev->ops->flush_pmksa(&rdev->wiphy, dev);
+
+ out:
+ cfg80211_unlock_rdev(rdev);
+ dev_put(dev);
+ out_rtnl:
+ rtnl_unlock();
+
+ return err;
+
+}
+
static struct genl_ops nl80211_ops[] = {
{
.cmd = NL80211_CMD_GET_WIPHY,
@@ -4465,6 +4563,25 @@ static struct genl_ops nl80211_ops[] = {
.policy = nl80211_policy,
.dumpit = nl80211_dump_survey,
},
+ {
+ .cmd = NL80211_CMD_SET_PMKSA,
+ .doit = nl80211_setdel_pmksa,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = NL80211_CMD_DEL_PMKSA,
+ .doit = nl80211_setdel_pmksa,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = NL80211_CMD_FLUSH_PMKSA,
+ .doit = nl80211_flush_pmksa,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+
};
static struct genl_multicast_group nl80211_mlme_mcgrp = {
.name = "mlme",
--
1.6.3.3
--
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