{nl,cfg,mac}80211: let userspace make meshif mesh gate

Allow userspace to set NL80211_MESHCONF_GATE_ANNOUNCEMENTS attribute,
which will advertise this mesh node as being a mesh gate.
NL80211_HWMP_ROOTMODE must be set or this will do nothing.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 20353bb..3769303 100644 (file)
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1864,6 +1864,10 @@ enum nl80211_mntr_flags {
  * @NL80211_MESHCONF_HWMP_RANN_INTERVAL:  The interval of time (in TUs) between
  * root announcements are transmitted.
  *
+ * @NL80211_MESHCONF_GATE_ANNOUNCEMENTS: Advertise that this mesh station has
+ * access to a broader network beyond the MBSS.  This is done via Root
+ * Announcement frames.
+ *
  * @NL80211_MESHCONF_ATTR_MAX: highest possible mesh configuration attribute
  *
  * @__NL80211_MESHCONF_ATTR_AFTER_LAST: internal use
@@ -1886,6 +1890,7 @@ enum nl80211_meshconf_params {
        NL80211_MESHCONF_HWMP_ROOTMODE,
        NL80211_MESHCONF_ELEMENT_TTL,
        NL80211_MESHCONF_HWMP_RANN_INTERVAL,
+       NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
 
        /* keep last */
        __NL80211_MESHCONF_ATTR_AFTER_LAST,

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 4f0d12e..77aa777 100644 (file)
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -756,6 +756,11 @@ struct mesh_config {
        u16 dot11MeshHWMPnetDiameterTraversalTime;
        u8  dot11MeshHWMPRootMode;
        u16 dot11MeshHWMPRannInterval;
+       /* This is missnamed in draft 12.0: dot11MeshGateAnnouncementProtocol
+        * set to true only means that the station will announce others it's a
+        * mesh gate, but not necessarily using the gate announcement protocol.
+        * Still keeping the same nomenclature to be in sync with the spec. */
+       bool  dot11MeshGateAnnouncementProtocol;
 };
 
 /**

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 9995c83..7d17a91 100644 (file)
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1137,6 +1137,10 @@ static int ieee80211_update_mesh_config(struct wiphy *wiphy,
                conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
                ieee80211_mesh_root_setup(ifmsh);
        }
+       if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
+               conf->dot11MeshGateAnnouncementProtocol =
+                       nconf->dot11MeshGateAnnouncementProtocol;
+       }
        if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask)) {
                conf->dot11MeshHWMPRannInterval =
                        nconf->dot11MeshHWMPRannInterval;

diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index bac9443..6e8eab7 100644 (file)
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -372,6 +372,8 @@ IEEE80211_IF_FILE(min_discovery_timeout,
                u.mesh.mshcfg.min_discovery_timeout, DEC);
 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
                u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
+IEEE80211_IF_FILE(dot11MeshGateAnnouncementProtocol,
+               u.mesh.mshcfg.dot11MeshGateAnnouncementProtocol, DEC);
 IEEE80211_IF_FILE(dot11MeshHWMPRannInterval,
                u.mesh.mshcfg.dot11MeshHWMPRannInterval, DEC);
 #endif
@@ -489,6 +491,7 @@ static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
        MESHPARAMS_ADD(min_discovery_timeout);
        MESHPARAMS_ADD(dot11MeshHWMPRootMode);
        MESHPARAMS_ADD(dot11MeshHWMPRannInterval);
+       MESHPARAMS_ADD(dot11MeshGateAnnouncementProtocol);
 #undef MESHPARAMS_ADD
 }
 #endif

diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index ae3de75..fd4f76a 100644 (file)
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -1045,8 +1045,11 @@ mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata)
 {
        struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
        u32 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
+       u8 flags;
 
-       mesh_path_sel_frame_tx(MPATH_RANN, 0, sdata->vif.addr,
+       flags = (ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol)
+                       ? RANN_FLAG_IS_GATE : 0;
+       mesh_path_sel_frame_tx(MPATH_RANN, flags, sdata->vif.addr,
                               cpu_to_le32(++ifmsh->sn),
                               0, NULL, 0, broadcast_addr,
                               0, sdata->u.mesh.mshcfg.element_ttl,

diff --git a/net/wireless/mesh.c b/net/wireless/mesh.c
index b5a39d4..4423e64 100644 (file)
--- a/net/wireless/mesh.c
+++ b/net/wireless/mesh.c
@@ -51,6 +51,7 @@ const struct mesh_config default_mesh_config = {
        .path_refresh_time = MESH_PATH_REFRESH_TIME,
        .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
        .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
+       .dot11MeshGateAnnouncementProtocol = false,
 };
 
 const struct mesh_setup default_mesh_setup = {

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index bbf3d73..57ecfa4 100644 (file)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3037,6 +3037,8 @@ static int nl80211_get_mesh_config(struct sk_buff *skb,
                        cur_params.dot11MeshHWMPRootMode);
        NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
                        cur_params.dot11MeshHWMPRannInterval);
+       NLA_PUT_U8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
+                       cur_params.dot11MeshGateAnnouncementProtocol);
        nla_nest_end(msg, pinfoattr);
        genlmsg_end(msg, hdr);
        return genlmsg_reply(msg, info);
@@ -3066,6 +3068,7 @@ static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_A
        [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
        [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
        [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
+       [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
 };
 
 static const struct nla_policy
@@ -3148,6 +3151,10 @@ do {\
                        dot11MeshHWMPRannInterval, mask,
                        NL80211_MESHCONF_HWMP_RANN_INTERVAL,
                        nla_get_u16);
+       FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
+                       dot11MeshGateAnnouncementProtocol, mask,
+                       NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
+                       nla_get_u8);
        if (mask_out)
                *mask_out = mask;