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, 5 insertions, 0 deletions

diff --git a/sys/net80211/ieee80211_mesh.h b/sys/net80211/ieee80211_mesh.h
index 1e14357..4447a3f 100644
--- a/sys/net80211/ieee80211_mesh.h
+++ b/sys/net80211/ieee80211_mesh.h
@@ -502,9 +502,12 @@ struct ieee80211_mesh_state {
 #define IEEE80211_MESHFLAGS_AP		0x01	/* accept peers */
 #define IEEE80211_MESHFLAGS_GATE	0x02	/* mesh gate role */
 #define IEEE80211_MESHFLAGS_FWD		0x04	/* forward packets */
+#define IEEE80211_MESHFLAGS_ROOT	0x08	/* configured as root */
 	uint8_t				ms_flags;
 	struct mtx			ms_rt_lock;
 	struct callout			ms_cleantimer;
+	struct callout			ms_gatetimer;
+	ieee80211_mesh_seq		ms_gateseq;
 	TAILQ_HEAD(, ieee80211_mesh_route)  ms_routes;
 	struct ieee80211_mesh_proto_metric *ms_pmetric;
 	struct ieee80211_mesh_proto_path   *ms_ppath;
@@ -537,6 +540,8 @@ uint8_t *	ieee80211_add_meshconf(uint8_t *, struct ieee80211vap *);
 uint8_t *	ieee80211_add_meshpeer(uint8_t *, uint8_t, uint16_t, uint16_t,
 		    uint16_t);
 uint8_t *	ieee80211_add_meshlmetric(uint8_t *, uint8_t, uint32_t);
+uint8_t *	ieee80211_add_meshgate(uint8_t *,
+		    struct ieee80211_meshgann_ie *);
 
 void		ieee80211_mesh_node_init(struct ieee80211vap *,
 		    struct ieee80211_node *);