Introduce wtap, the beginnings of a net80211 wlan simulator.

This introduces:

* a basic wtap interface
* a HAL, which implements an abstraction layer for implementing
  different device behavious;
* A visibility plugin, which allows for control over which nodes
  see other nodes (useful for mesh work.)

It doesn't yet implement sta/adhoc/hostap modes but these are quite
feasible to implement.

Monthadar uses it to do 802.11s mesh verification.

The userland tools will be committed in a follow-up commit.

Submitted by:	Monthadar Al Jaberi <monthadar@gmail.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/sys/modules/wtap/Makefile b/sys/modules/wtap/Makefile
new file mode 100644
index 000000000000..b9e8827e23d9
--- /dev/null
+++ b/sys/modules/wtap/Makefile
@@ -0,0 +1,30 @@
+# $FreeBSD$
+
+.PATH:	${.CURDIR}/../../dev/wtap
+
+# Declare Name of kernel module
+KMOD	=  wtap
+
+# Enumerate Source files for kernel module
+SRCS	=  if_wtap_module.c if_wtap.c if_medium.c
+
+.PATH:	${.CURDIR}/../../dev/wtap/wtap_hal
+SRCS	+= hal.c
+
+.PATH:	${.CURDIR}/../../dev/wtap/plugins
+SRCS	+= visibility.c
+
+SRCS	+= opt_global.h
+
+.if defined(KERNBUILDDIR)
+MKDEP=          -include ${KERNBUILDDIR}/opt_global.h
+.else
+CFLAGS+=        -include opt_global.h
+MKDEP=          -include opt_global.h
+
+opt_global.h:
+	echo "#define VIMAGE 1" > ${.TARGET}
+.endif
+
+# Include kernel module makefile
+.include <bsd.kmod.mk>