Mesh update: add base Mesh Gate functionality.

A Mesh Gate should transmit a Mesh Action frame containing
ieee80211_meshgann_ie as its only information element periodically
every ieee80211_mesh_gateint ms. Unless the mesh gate is also configure
as a ROOT, then these frames should not be send.
This is according to 802.11 2012 standard;

* Introduce new SYSCTL net.wlan.mesh.gateint, with 10s default;
* Add two new functions mesh_gatemode_setup and mesh_gatemode_cb. This
  is similar to how HWMP setups up a callout;
* Add two new action handlers mesh_recv_action_meshgate and
  mesh_send_action_meshgate;
* Added ieee80211_add_meshgate to ieee80211_mesh.h;
* Modified mesh_send_action to look similar to hwmp_send_action. This is
  because we need to send out broadcast management frames.
* Introduced a new flag for mesh state IEEE80211_MESHFLAGS_ROOT. This flag
  is now set by HWMP code when a mesh STA is configured as a ROOT. This
  is then checked by mesh_gatemode_cb before scheduling a new callout;
* Added to new field to ieee80211_mesh_state:
    + struct callout                  ms_gatetimer
    + ieee80211_mesh_seq              ms_gateseq;

Approved by:	adrian (mentor)

1 files changed, 4 insertions, 0 deletions

diff --git a/sys/net80211/ieee80211_hwmp.c b/sys/net80211/ieee80211_hwmp.c
index 07b337c..0305199 100644
--- a/sys/net80211/ieee80211_hwmp.c
+++ b/sys/net80211/ieee80211_hwmp.c
@@ -805,19 +805,23 @@ static void
 hwmp_rootmode_setup(struct ieee80211vap *vap)
 {
 	struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
+	struct ieee80211_mesh_state *ms = vap->iv_mesh;
 
 	switch (hs->hs_rootmode) {
 	case IEEE80211_HWMP_ROOTMODE_DISABLED:
 		callout_drain(&hs->hs_roottimer);
+		ms->ms_flags &= ~IEEE80211_MESHFLAGS_ROOT;
 		break;
 	case IEEE80211_HWMP_ROOTMODE_NORMAL:
 	case IEEE80211_HWMP_ROOTMODE_PROACTIVE:
 		callout_reset(&hs->hs_roottimer, ieee80211_hwmp_rootint,
 		    hwmp_rootmode_cb, vap);
+		ms->ms_flags |= IEEE80211_MESHFLAGS_ROOT;
 		break;
 	case IEEE80211_HWMP_ROOTMODE_RANN:
 		callout_reset(&hs->hs_roottimer, ieee80211_hwmp_rannint,
 		    hwmp_rootmode_rann_cb, vap);
+		ms->ms_flags |= IEEE80211_MESHFLAGS_ROOT;
 		break;
 	}
 }