mac80211: allow changing port control protocol

Some vendor specified mechanisms for 802.1X-style
functionality use a different protocol than EAP
(even if EAP is vendor-extensible). Support this
in mac80211 via the cfg80211 API for it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 7d2bb6f..f648377 100644 (file)
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -509,6 +509,8 @@ struct ieee80211_sub_if_data {
        struct ieee80211_key *default_mgmt_key;
 
        u16 sequence_number;
+       __be16 control_port_protocol;
+       bool control_port_no_encrypt;
 
        struct work_struct work;
        struct sk_buff_head skb_queue;

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 9369710..810e676 100644 (file)
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -855,6 +855,9 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
        sdata->dev->netdev_ops = &ieee80211_dataif_ops;
        sdata->wdev.iftype = type;
 
+       sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
+       sdata->control_port_no_encrypt = false;
+
        /* only monitor differs */
        sdata->dev->type = ARPHRD_ETHER;
 

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 15f0e96..964c267 100644 (file)
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -627,6 +627,9 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
        local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 #endif
 
+       /* mac80211 supports control port protocol changing */
+       local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
+
        if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
                local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
        else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 5282ac1..0cb4296 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2262,6 +2262,9 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
        else
                ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
 
+       sdata->control_port_protocol = req->crypto.control_port_ethertype;
+       sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
+
        ieee80211_add_work(wk);
        return 0;
 }

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 6e5fb16..ac205a3 100644 (file)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1527,7 +1527,7 @@ static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
         * Allow EAPOL frames to us/the PAE group address regardless
         * of whether the frame was encrypted or not.
         */
-       if (ehdr->h_proto == htons(ETH_P_PAE) &&
+       if (ehdr->h_proto == rx->sdata->control_port_protocol &&
            (compare_ether_addr(ehdr->h_dest, rx->sdata->vif.addr) == 0 ||
             compare_ether_addr(ehdr->h_dest, pae_group_addr) == 0))
                return true;

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 31a8903..92764bb 100644 (file)
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -508,6 +508,18 @@ ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
                return ieee80211_tx_h_multicast_ps_buf(tx);
 }
 
+static ieee80211_tx_result debug_noinline
+ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
+{
+       struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
+
+       if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol &&
+                    tx->sdata->control_port_no_encrypt))
+               info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+
+       return TX_CONTINUE;
+}
+
 static ieee80211_tx_result debug_noinline
 ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
 {
@@ -527,7 +539,7 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
        else if ((key = rcu_dereference(tx->sdata->default_key)))
                tx->key = key;
        else if (tx->sdata->drop_unencrypted &&
-                (tx->skb->protocol != cpu_to_be16(ETH_P_PAE)) &&
+                (tx->skb->protocol != tx->sdata->control_port_protocol) &&
                 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
                 (!ieee80211_is_robust_mgmt_frame(hdr) ||
                  (ieee80211_is_action(hdr->frame_control) &&
@@ -1349,6 +1361,7 @@ static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
        CALL_TXH(ieee80211_tx_h_dynamic_ps);
        CALL_TXH(ieee80211_tx_h_check_assoc);
        CALL_TXH(ieee80211_tx_h_ps_buf);
+       CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
        CALL_TXH(ieee80211_tx_h_select_key);
        if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL))
                CALL_TXH(ieee80211_tx_h_rate_ctrl);
@@ -1826,7 +1839,8 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 #endif
        case NL80211_IFTYPE_STATION:
                memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
-               if (sdata->u.mgd.use_4addr && ethertype != ETH_P_PAE) {
+               if (sdata->u.mgd.use_4addr &&
+                   cpu_to_be16(ethertype) != sdata->control_port_protocol) {
                        fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
                        /* RA TA DA SA */
                        memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
@@ -1879,7 +1893,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
        if (!ieee80211_vif_is_mesh(&sdata->vif) &&
                unlikely(!is_multicast_ether_addr(hdr.addr1) &&
                      !(sta_flags & WLAN_STA_AUTHORIZED) &&
-                     !(ethertype == ETH_P_PAE &&
+                     !(cpu_to_be16(ethertype) == sdata->control_port_protocol &&
                       compare_ether_addr(sdata->vif.addr,
                                          skb->data + ETH_ALEN) == 0))) {
 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG