Revamp 802.11 action frame handling:

o add a new facility for components to register send+recv handlers
o ieee80211_send_action and ieee80211_recv_action now use the registered
  handlers to dispatch operations
o rev ieee80211_send_action api to enable passing arbitrary data
o rev ieee80211_recv_action api to pass the 802.11 frame header as it may
  be difficult to locate
o update existing IEEE80211_ACTION_CAT_BA and IEEE80211_ACTION_CAT_HT handling
o update mwl for api rev

Reviewed by:	rpaulo
Approved by:	re (kensmith)

1 files changed, 291 insertions, 0 deletions

diff --git a/sys/net80211/ieee80211_action.c b/sys/net80211/ieee80211_action.c
new file mode 100644
index 0000000..a694d25
--- /dev/null
+++ b/sys/net80211/ieee80211_action.c
@@ -0,0 +1,291 @@
+/*-
+ * Copyright (c) 2009 Sam Leffler, Errno Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#ifdef __FreeBSD__
+__FBSDID("$FreeBSD$");
+#endif
+
+/*
+ * IEEE 802.11 send/recv action frame support.
+ */
+
+#include "opt_inet.h"
+#include "opt_wlan.h"
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/systm.h> 
+ 
+#include <sys/socket.h>
+
+#include <net/if.h>
+#include <net/if_media.h>
+#include <net/ethernet.h>
+
+#include <net80211/ieee80211_var.h>
+#include <net80211/ieee80211_action.h>
+
+static int
+send_inval(struct ieee80211_node *ni, int cat, int act, void *sa)
+{
+	return EINVAL;
+}
+
+static ieee80211_send_action_func *ba_send_action[8] = {
+	send_inval, send_inval, send_inval, send_inval,
+	send_inval, send_inval, send_inval, send_inval,
+};
+static ieee80211_send_action_func *ht_send_action[8] = {
+	send_inval, send_inval, send_inval, send_inval,
+	send_inval, send_inval, send_inval, send_inval,
+};
+/* NB: temporary until 802.11s support is added */
+#ifdef IEEE80211_ACTION_CAT_MESHPEERING
+static ieee80211_send_action_func *meshpl_send_action[8] = {
+	send_inval, send_inval, send_inval, send_inval,
+	send_inval, send_inval, send_inval, send_inval,
+};
+static ieee80211_send_action_func *meshlm_send_action[4] = {
+	send_inval, send_inval, send_inval, send_inval,
+};
+static ieee80211_send_action_func *hwmp_send_action[8] = {
+	send_inval, send_inval, send_inval, send_inval,
+	send_inval, send_inval, send_inval, send_inval,
+};
+#endif
+static ieee80211_send_action_func *vendor_send_action[8] = {
+	send_inval, send_inval, send_inval, send_inval,
+	send_inval, send_inval, send_inval, send_inval,
+};
+
+int
+ieee80211_send_action_register(int cat, int act, ieee80211_send_action_func *f)
+{
+#define	N(a)	(sizeof(a) / sizeof(a[0]))
+	switch (cat) {
+	case IEEE80211_ACTION_CAT_BA:
+		if (act >= N(ba_send_action))
+			break;
+		ba_send_action[act] = f;
+		return 0;
+	case IEEE80211_ACTION_CAT_HT:
+		if (act >= N(ht_send_action))
+			break;
+		ht_send_action[act] = f;
+		return 0;
+#ifdef IEEE80211_ACTION_CAT_MESHPEERING
+	case IEEE80211_ACTION_CAT_MESHPEERING:
+		if (act >= N(meshpl_send_action))
+			break;
+		meshpl_send_action[act] = f;
+		return 0;
+	case IEEE80211_ACTION_CAT_MESHLMETRIC:
+		if (act >= N(meshlm_send_action))
+			break;
+		meshlm_send_action[act] = f;
+		return 0;
+	case IEEE80211_ACTION_CAT_MESHPATH:
+		if (act > N(hwmp_send_action))
+			break;
+		hwmp_send_action[act] = f;
+		return 0;
+#endif
+	case IEEE80211_ACTION_CAT_VENDOR:
+		if (act >= N(vendor_send_action))
+			break;
+		vendor_send_action[act] = f;
+		return 0;
+	}
+	return EINVAL;
+#undef N
+}
+
+void
+ieee80211_send_action_unregister(int cat, int act)
+{
+	ieee80211_send_action_register(cat, act, send_inval);
+}
+
+int
+ieee80211_send_action(struct ieee80211_node *ni, int cat, int act, void *sa)
+{
+#define	N(a)	(sizeof(a) / sizeof(a[0]))
+	ieee80211_send_action_func *f = send_inval;
+
+	switch (cat) {
+	case IEEE80211_ACTION_CAT_BA:
+		if (act < N(ba_send_action))
+			f = ba_send_action[act];
+		break;
+	case IEEE80211_ACTION_CAT_HT:
+		if (act < N(ht_send_action))
+			f = ht_send_action[act];
+		break;
+#ifdef IEEE80211_ACTION_CAT_MESHPEERING
+	case IEEE80211_ACTION_CAT_MESHPEERING:
+		if (act < N(meshpl_send_action))
+			f = meshpl_send_action[act];
+		break;
+	case IEEE80211_ACTION_CAT_MESHLMETRIC:
+		if (act < N(meshlm_send_action))
+			f = meshlm_send_action[act];
+		break;
+	case IEEE80211_ACTION_CAT_MESHPATH:
+		if (act < N(hwmp_send_action))
+			f = hwmp_send_action[act];
+		break;
+#endif
+	case IEEE80211_ACTION_CAT_VENDOR:
+		if (act < N(vendor_send_action))
+			f = vendor_send_action[act];
+		break;
+	}
+	return f(ni, cat, act, sa);
+#undef N
+}
+
+static int
+recv_inval(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
+	const uint8_t *frm, const uint8_t *efrm)
+{
+	return EINVAL;
+}
+
+static ieee80211_recv_action_func *ba_recv_action[8] = {
+	recv_inval, recv_inval, recv_inval, recv_inval,
+	recv_inval, recv_inval, recv_inval, recv_inval,
+};
+static ieee80211_recv_action_func *ht_recv_action[8] = {
+	recv_inval, recv_inval, recv_inval, recv_inval,
+	recv_inval, recv_inval, recv_inval, recv_inval,
+};
+#ifdef IEEE80211_ACTION_CAT_MESHPEERING
+static ieee80211_recv_action_func *meshpl_recv_action[8] = {
+	recv_inval, recv_inval, recv_inval, recv_inval,
+	recv_inval, recv_inval, recv_inval, recv_inval,
+};
+static ieee80211_recv_action_func *meshlm_recv_action[4] = {
+	recv_inval, recv_inval, recv_inval, recv_inval,
+};
+static ieee80211_recv_action_func *hwmp_recv_action[8] = {
+	recv_inval, recv_inval, recv_inval, recv_inval,
+	recv_inval, recv_inval, recv_inval, recv_inval,
+};
+#endif
+static ieee80211_recv_action_func *vendor_recv_action[8] = {
+	recv_inval, recv_inval, recv_inval, recv_inval,
+	recv_inval, recv_inval, recv_inval, recv_inval,
+};
+
+int
+ieee80211_recv_action_register(int cat, int act, ieee80211_recv_action_func *f)
+{
+#define	N(a)	(sizeof(a) / sizeof(a[0]))
+	switch (cat) {
+	case IEEE80211_ACTION_CAT_BA:
+		if (act >= N(ba_recv_action))
+			break;
+		ba_recv_action[act] = f;
+		return 0;
+	case IEEE80211_ACTION_CAT_HT:
+		if (act >= N(ht_recv_action))
+			break;
+		ht_recv_action[act] = f;
+		return 0;
+#ifdef IEEE80211_ACTION_CAT_MESHPEERING
+	case IEEE80211_ACTION_CAT_MESHPEERING:
+		if (act >= N(meshpl_recv_action))
+			break;
+		meshpl_recv_action[act] = f;
+		return 0;
+	case IEEE80211_ACTION_CAT_MESHLMETRIC:
+		if (act >= N(meshlm_recv_action))
+			break;
+		meshlm_recv_action[act] = f;
+		return 0;
+	case IEEE80211_ACTION_CAT_MESHPATH:
+		if (act >= N(hwmp_recv_action))
+			break;
+		hwmp_recv_action[act] = f;
+		return 0;
+#endif
+	case IEEE80211_ACTION_CAT_VENDOR:
+		if (act >= N(vendor_recv_action))
+			break;
+		vendor_recv_action[act] = f;
+		return 0;
+	}
+	return EINVAL;
+#undef N
+}
+
+void
+ieee80211_recv_action_unregister(int cat, int act)
+{
+	ieee80211_recv_action_register(cat, act, recv_inval);
+}
+
+int
+ieee80211_recv_action(struct ieee80211_node *ni,
+	const struct ieee80211_frame *wh,
+	const uint8_t *frm, const uint8_t *efrm)
+{
+#define	N(a)	(sizeof(a) / sizeof(a[0]))
+	ieee80211_recv_action_func *f = recv_inval;
+	const struct ieee80211_action *ia =
+	    (const struct ieee80211_action *) frm;
+
+	switch (ia->ia_category) {
+	case IEEE80211_ACTION_CAT_BA:
+		if (ia->ia_action < N(ba_recv_action))
+			f = ba_recv_action[ia->ia_action];
+		break;
+	case IEEE80211_ACTION_CAT_HT:
+		if (ia->ia_action < N(ht_recv_action))
+			f = ht_recv_action[ia->ia_action];
+		break;
+#ifdef IEEE80211_ACTION_CAT_MESHPEERING
+	case IEEE80211_ACTION_CAT_MESHPEERING:
+		if (ia->ia_action < N(meshpl_recv_action))
+			f = meshpl_recv_action[ia->ia_action];
+		break;
+	case IEEE80211_ACTION_CAT_MESHLMETRIC:
+		if (ia->ia_action < N(meshlm_recv_action))
+			f = meshlm_recv_action[ia->ia_action];
+		break;
+	case IEEE80211_ACTION_CAT_MESHPATH:
+		if (ia->ia_action < N(hwmp_recv_action))
+			f = hwmp_recv_action[ia->ia_action];
+		break;
+#endif
+	case IEEE80211_ACTION_CAT_VENDOR:
+		if (ia->ia_action < N(vendor_recv_action))
+			f = vendor_recv_action[ia->ia_action];
+		break;
+	}
+	return f(ni, wh, frm, efrm);
+#undef N
+}