Make tap build on OSX 10.9, though not in a way that is easy for users. Instead package binaries.

Makefile.mac

@@ -35,18 +35,18 @@ idtool: $(OBJS)
 	$(CXX) $(CXXFLAGS) -o zerotier-idtool idtool.cpp $(OBJS) $(LIBS)
 	$(STRIP) zerotier-idtool
 
-mac-tap: FORCE
+#mac-tap: FORCE
-	cd mac-tap/tuntap ; make tap.kext
+#	cd mac-tap/tuntap ; make tap.kext
 
-install-mac-tap: FORCE
+#install-mac-tap: FORCE
-	mkdir -p /Library/Application\ Support/ZeroTier/One
+#	mkdir -p /Library/Application\ Support/ZeroTier/One
-	rm -rf /Library/Application\ Support/ZeroTier/One/tap.kext
+#	rm -rf /Library/Application\ Support/ZeroTier/One/tap.kext
-	cp -R mac-tap/tuntap/tap.kext /Library/Application\ Support/ZeroTier/One
+#	cp -R mac-tap/tuntap/tap.kext /Library/Application\ Support/ZeroTier/One
-	chown -R root:wheel /Library/Application\ Support/ZeroTier/One/tap.kext
+#	chown -R root:wheel /Library/Application\ Support/ZeroTier/One/tap.kext
 
 clean:
 	rm -rf *.dSYM
 	rm -f $(OBJS) zerotier-*
-	cd mac-tap/tuntap ; make clean
+	cd tap-mac/tuntap ; make clean
 
 FORCE:

ext/bin/tap-mac/tap.kext/Contents/Info.plist

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>English</string>
+	<key>CFBundleExecutable</key>
+	<string>tap</string>
+	<key>CFBundleIdentifier</key>
+	<string>com.zerotier.tap</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>tap</string>
+	<key>CFBundlePackageType</key>
+	<string>KEXT</string>
+	<key>CFBundleShortVersionString</key>
+	<string>20111101</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1.0</string>
+	<key>OSBundleLibraries</key>
+	<dict>
+		<key>com.apple.kpi.mach</key>
+		<string>8.0</string>
+		<key>com.apple.kpi.bsd</key>
+		<string>8.0</string>
+		<key>com.apple.kpi.libkern</key>
+		<string>8.0</string>
+		<key>com.apple.kpi.unsupported</key>
+		<string>8.0</string>
+	</dict>
+</dict>
+</plist>
+

tap-mac/tuntap/README.zerotier-build

@@ -0,0 +1,18 @@
+Building the tap for both x86_64 and i386 requires an older version of the
+Xcode tools than what now ships for Mavericks (10.9). The newer version
+does not support creating i386 kernel images.
+
+These can be obtained from:
+
+https://developer.apple.com/downloads
+
+It requires a bit of a dance to unpack the package and obtain an unpacked
+tree, but once it's there you can change the line in tap/Makefile and
+build for both architectures.
+
+This will go on until i386 is thoroughly legacy, at which point we'll
+probably start just supporting x86_64. But that might be a while. We want
+to support old Macs through their entire useful life.
+
+Since this build is irritating, a pre-built copy is packaged in ext/ and
+is installed by 'make install'. So users shouldn't have to build this.

tap-mac/tuntap/src/tap/Makefile

@@ -19,7 +19,7 @@ BUNDLE_SIGNATURE = ????
 BUNDLE_PACKAGETYPE = KEXT
 BUNDLE_VERSION = $(TAP_KEXT_VERSION)
 
-INCLUDE = -I.. -I/System/Library/Frameworks/Kernel.framework/Headers
+INCLUDE = -I.. -I/System/Library/Frameworks/Kernel.framework/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/Kernel.framework/Headers
 CFLAGS = -Wall -mkernel -force_cpusubtype_ALL \
 	-fno-builtin -fno-stack-protector -arch i386 -arch x86_64 \
 	-DKERNEL -D__APPLE__ -DKERNEL_PRIVATE -DTUNTAP_VERSION=\"$(TUNTAP_VERSION)\" \
@@ -27,7 +27,9 @@ CFLAGS = -Wall -mkernel -force_cpusubtype_ALL \
 CCFLAGS = $(CFLAGS)
 LDFLAGS = -Wall -mkernel -nostdlib -r -lcc_kext -arch i386 -arch x86_64 -Xlinker -kext
 
-CCP = $(shell if [ -f /usr/bin/llvm-g++ ]; then echo llvm-g++; else echo g++; fi)
+#CCP = g++
+CCP = $(HOME)/Code/llvm-g++-Xcode4.6.2/bin/llvm-g++
+
 CC = gcc
 
 all: $(KMOD_BIN) bundle

tap-mac/tuntap/src/tap/tap.h

@@ -34,8 +34,7 @@
 
 #define TAP_IF_COUNT			16	/* max number of tap interfaces */
 
-// ZeroTier default MTU, see Constants.hpp
+#define TAP_MTU				4000
-#define TAP_MTU				2800
 
 #define TAP_LLADDR			tap_lladdr