Multi-bss (aka vap) support for 802.11 devices.

Note this includes changes to all drivers and moves some device firmware
loading to use firmware(9) and a separate module (e.g. ral).  Also there
no longer are separate wlan_scan* modules; this functionality is now
bundled into the wlan module.

Supported by:	Hobnob and Marvell
Reviewed by:	many
Obtained from:	Atheros (some bits)

1 files changed, 136 insertions, 0 deletions

diff --git a/sys/net80211/ieee80211_monitor.c b/sys/net80211/ieee80211_monitor.c
new file mode 100644
index 0000000..b1e98eb
--- /dev/null
+++ b/sys/net80211/ieee80211_monitor.c
@@ -0,0 +1,136 @@
+/*-
+ * Copyright (c) 2007-2008 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 Monitor mode support.
+ */
+#include "opt_inet.h"
+#include "opt_wlan.h"
+
+#include <sys/param.h>
+#include <sys/systm.h> 
+#include <sys/mbuf.h>   
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+
+#include <sys/socket.h>
+#include <sys/sockio.h>
+#include <sys/endian.h>
+#include <sys/errno.h>
+#include <sys/proc.h>
+#include <sys/sysctl.h>
+
+#include <net/if.h>
+#include <net/if_media.h>
+#include <net/if_llc.h>
+#include <net/ethernet.h>
+
+#include <net/bpf.h>
+
+#include <net80211/ieee80211_var.h>
+#include <net80211/ieee80211_monitor.h>
+
+static void monitor_vattach(struct ieee80211vap *);
+static int monitor_newstate(struct ieee80211vap *, enum ieee80211_state, int);
+static int monitor_input(struct ieee80211_node *ni, struct mbuf *m,
+	int rssi, int noise, uint32_t rstamp);
+
+void
+ieee80211_monitor_attach(struct ieee80211com *ic)
+{
+	ic->ic_vattach[IEEE80211_M_MONITOR] = monitor_vattach;
+}
+
+void
+ieee80211_monitor_detach(struct ieee80211com *ic)
+{
+}
+
+static void
+monitor_vdetach(struct ieee80211vap *vap)
+{
+}
+
+static void
+monitor_vattach(struct ieee80211vap *vap)
+{
+	vap->iv_newstate = monitor_newstate;
+	vap->iv_input = monitor_input;
+	vap->iv_opdetach = monitor_vdetach;
+}
+
+/*
+ * IEEE80211_M_MONITOR vap state machine handler.
+ */
+static int
+monitor_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
+{
+	struct ieee80211com *ic = vap->iv_ic;
+	enum ieee80211_state ostate;
+
+	IEEE80211_LOCK_ASSERT(ic);
+
+	ostate = vap->iv_state;
+	IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
+	    __func__, ieee80211_state_name[ostate],
+	    ieee80211_state_name[nstate], arg);
+	vap->iv_state = nstate;			/* state transition */
+	if (nstate == IEEE80211_S_RUN) {
+		switch (ostate) {
+		case IEEE80211_S_INIT:
+			ieee80211_create_ibss(vap, ic->ic_curchan);
+			break;
+		default:
+			break;
+		}
+		/*
+		 * NB: this shouldn't be here but many people use
+		 * monitor mode for raw packets; once we switch
+		 * them over to adhoc demo mode remove this.
+		 */
+		ieee80211_node_authorize(vap->iv_bss);
+	}
+	return 0;
+}
+
+/*
+ * Process a received frame in monitor mode.
+ */
+static int
+monitor_input(struct ieee80211_node *ni, struct mbuf *m,
+	int rssi, int noise, uint32_t rstamp)
+{
+	struct ieee80211vap *vap = ni->ni_vap;
+
+	if (bpf_peers_present(vap->iv_rawbpf))
+		bpf_mtap(vap->iv_rawbpf, m);
+	m_freem(m);
+	return -1;
+}