mac80211: update peer link management IE and action frames

Update the length and format of the peer link management action frames.

Signed-off-by: Rui Paulo <rpaulo@gmail.com>
Signed-off-by: Javier Cardona <javier@cozybit.com>
Reviewed-by: Andrey Yurovsky <andrey@cozybit.com>
Tested-by: Brian Cavagnolo <brian@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 7942518..63427d9 100644 (file)
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -553,7 +553,7 @@ static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
                                          struct ieee80211_rx_status *rx_status)
 {
        switch (mgmt->u.action.category) {
-       case PLINK_CATEGORY:
+       case MESH_PLINK_CATEGORY:
                mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
                break;
        case MESH_PATH_SEL_CATEGORY:

diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index 9948107..536d5c0 100644 (file)
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -206,7 +206,7 @@ struct mesh_rmc {
 #define MESH_MAX_MPATHS                1024
 
 /* Pending ANA approval */
-#define PLINK_CATEGORY         30
+#define MESH_PLINK_CATEGORY    30
 #define MESH_PATH_SEL_CATEGORY 32
 
 /* Public interfaces */

diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index 4188752..8a54bc8 100644 (file)
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -18,9 +18,8 @@
 #define mpl_dbg(fmt, args...)  do { (void)(0); } while (0)
 #endif
 
-#define PLINK_GET_FRAME_SUBTYPE(p) (p)
-#define PLINK_GET_LLID(p) (p + 1)
-#define PLINK_GET_PLID(p) (p + 3)
+#define PLINK_GET_LLID(p) (p + 4)
+#define PLINK_GET_PLID(p) (p + 6)
 
 #define mod_plink_timer(s, t) (mod_timer(&s->plink_timer, \
                                jiffies + HZ * t / 1000))
@@ -154,6 +153,7 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
        struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
        struct ieee80211_mgmt *mgmt;
        bool include_plid = false;
+       static const u8 meshpeeringproto[] = { 0x00, 0x0F, 0xAC, 0x2A };
        u8 *pos;
        int ie_len;
 
@@ -171,7 +171,7 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
        memcpy(mgmt->da, da, ETH_ALEN);
        memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
        /* BSSID is left zeroed, wildcard value */
-       mgmt->u.action.category = PLINK_CATEGORY;
+       mgmt->u.action.category = MESH_PLINK_CATEGORY;
        mgmt->u.action.u.plink_action.action_code = action;
 
        if (action == PLINK_CLOSE)
@@ -189,18 +189,18 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
        /* Add Peer Link Management element */
        switch (action) {
        case PLINK_OPEN:
-               ie_len = 3;
+               ie_len = 6;
                break;
        case PLINK_CONFIRM:
-               ie_len = 5;
+               ie_len = 8;
                include_plid = true;
                break;
        case PLINK_CLOSE:
        default:
                if (!plid)
-                       ie_len = 5;
+                       ie_len = 8;
                else {
-                       ie_len = 7;
+                       ie_len = 10;
                        include_plid = true;
                }
                break;
@@ -209,7 +209,8 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
        pos = skb_put(skb, 2 + ie_len);
        *pos++ = WLAN_EID_PEER_LINK;
        *pos++ = ie_len;
-       *pos++ = action;
+       memcpy(pos, meshpeeringproto, sizeof(meshpeeringproto));
+       pos += 4;
        memcpy(pos, &llid, 2);
        if (include_plid) {
                pos += 2;
@@ -419,12 +420,13 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
                return;
        }
 
-       ftype = *((u8 *)PLINK_GET_FRAME_SUBTYPE(elems.peer_link));
+       ftype = mgmt->u.action.u.plink_action.action_code;
        ie_len = elems.peer_link_len;
-       if ((ftype == PLINK_OPEN && ie_len != 3) ||
-           (ftype == PLINK_CONFIRM && ie_len != 5) ||
-           (ftype == PLINK_CLOSE && ie_len != 5 && ie_len != 7)) {
-               mpl_dbg("Mesh plink: incorrect plink ie length\n");
+       if ((ftype == PLINK_OPEN && ie_len != 6) ||
+           (ftype == PLINK_CONFIRM && ie_len != 8) ||
+           (ftype == PLINK_CLOSE && ie_len != 8 && ie_len != 10)) {
+               mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n",
+                   ftype, ie_len);
                return;
        }
 
@@ -436,7 +438,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
         * from the point of view of this host.
         */
        memcpy(&plid, PLINK_GET_LLID(elems.peer_link), 2);
-       if (ftype == PLINK_CONFIRM || (ftype == PLINK_CLOSE && ie_len == 7))
+       if (ftype == PLINK_CONFIRM || (ftype == PLINK_CLOSE && ie_len == 10))
                memcpy(&llid, PLINK_GET_PLID(elems.peer_link), 2);
 
        rcu_read_lock();

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 28316b2..4066570 100644 (file)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -507,7 +507,7 @@ ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
 
                if (ieee80211_is_action(hdr->frame_control)) {
                        mgmt = (struct ieee80211_mgmt *)hdr;
-                       if (mgmt->u.action.category != PLINK_CATEGORY)
+                       if (mgmt->u.action.category != MESH_PLINK_CATEGORY)
                                return RX_DROP_MONITOR;
                        return RX_CONTINUE;
                }