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ETHER: Add Apple vmnet support when running on macOS

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Base vmnet support covers bridged network interfaces and locally
accessible TAP network connections. These reflect the vmnet bridged
and host behaviors which are leveraged under the covers, but configured
using the original sim_ether commands.  The resulting bridged case
behaves like the Windows network connections do (with direct access
to and from the local LAN as well as the host system) using the natural
interface name.  NAT behaviors are specifically supported using the
original SLiRP code since the vmnet support depends on simulators
primarily getting IPv4 addressing via DHCP, but essentially no simh
simulators actually had OS network code which used DHCP and all
merely used static network address setup.  The vmnet (shared/NAT)
support can't be configured to operate with the same DHCP and static
IP addresses provided by the original SLiRP implementation and to
avoid the need to specifically change hard coded simulator IPv4
addresses before things could work.

- Detect which network interfaces are WiFi (when possible) and thus
  not useful candidates for bridging.
- Cleanly report when running as root is needed.
- Avoid allowing network connections to interfaces which aren't
  actually connected to a network.
- Add support to explicitly set TAP network host side network
  interface's IPv4 address and netmask.  This optional support is
  provided specifically for the Apple vmnet case, but not for other
  platforms using TAP network connections due to the various ways
  that must be handled with external commands.
- Add host system's IPv4 address, netmask, media type and connection
  state to interface descriptions visible via SHOW ETHERNET.
  Some system environments may have a significant number of potential
  network interfaces, most of which aren't interesting to connect
  simulators to.  Knowing which interfaces are actually in useful
  states helps users select the correct device.

The vmnet aspect of this functionality was originally inspired by
Calvin Buckley's pull request to the open-simh repository.  That
solution wouldn't actually operate well certainly for NAT cases due
to the forced DHCP to non-configurable address blocks and the lack
of any way to support static addresses TCP or  UDP port mapping.
This commit is contained in:
Mark Pizzolato
2025-06-06 14:51:46 -10:00
parent fd60c6b0f7
commit 61fe27cb47
7 changed files with 1491 additions and 638 deletions
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346
makefile
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@@ -547,7 +547,7 @@ ifeq (${WIN32},) #*nix Environments (&& cygwin)
OSNAME = OSX
LIBEXT = dylib
ifneq (include,$(findstring include,$(UNSUPPORTED_BUILD)))
INCPATH:=$(shell LANG=C; ${GCC} -x c -v -E /dev/null 2>&1 | grep -A 10 '> search starts here' | grep '^ ' | grep -v 'framework directory' | tr -d '\n')
INCPATH:=$(shell LANG=C; ${GCC} -x c -v -E /dev/null 2>&1 | grep -A 10 '> search starts here' | grep '^ ' | awk '{ print $$1 }' | tr '\n' ' ')
endif
ifeq (incopt,$(shell if ${TEST} -d /opt/local/include; then echo incopt; fi))
INCPATH += /opt/local/include
@@ -946,7 +946,7 @@ ifeq (${WIN32},) #*nix Environments (&& cygwin)
VIDEO_TTF_LDFLAGS += -lSDL2_ttf
VIDEO_FEATURES += with TrueType font support
# Retain support for explicitly supplying a preferred fontfile
ifneq (,$(FONTFILE))
ifneq (,$(and $(FONTFILE))
VIDEO_TTF_OPT += -DFONTFILE=${FONTFILE}
endif
else
@@ -959,81 +959,25 @@ ifeq (${WIN32},) #*nix Environments (&& cygwin)
endif
endif
ifneq (,$(NETWORK_USEFUL))
ifneq (,$(call find_include,pcap))
ifneq (,$(shell grep 'pcap/pcap.h' $(call find_include,pcap) | grep include))
PCAP_H_PATH = $(dir $(call find_include,pcap))pcap/pcap.h
ifeq (Darwin,$(OSTYPE)) # the macOS vmnet framework is only useful when the OS is 10.15 or later
macOSMajor = $(strip $(shell sw_vers 2>/dev/null | grep 'ProductVersion:' 2>/dev/null | awk '{ print $$2 }' | awk -F . '{ print $$1 }'))
macOSMinor = $(strip $(shell sw_vers 2>/dev/null | grep 'ProductVersion:' 2>/dev/null | awk '{ print $$2 }' | awk -F . '{ print $$2 }'))
ifeq (10,$(macOSMajor))
DONT_USE_VMNET = $(shell if ${TEST} $(macOSMinor) -lt 15; then echo DONT_USE_VMNET; fi)
else
PCAP_H_PATH = $(call find_include,pcap)
DONT_USE_VMNET = $(shell if ${TEST} $(macOSMajor) -lt 10; then echo DONT_USE_VMNET; fi)
endif
ifneq (,$(shell grep pcap_compile $(PCAP_H_PATH) | grep const))
BPF_CONST_STRING = -DBPF_CONST_STRING
endif
NETWORK_CCDEFS += -DHAVE_PCAP_NETWORK -I$(dir $(call find_include,pcap)) $(BPF_CONST_STRING)
NETWORK_LAN_FEATURES += PCAP
ifneq (,$(call find_lib,$(PCAPLIB)))
ifneq ($(USE_NETWORK),) # Network support specified on the GNU make command line
NETWORK_CCDEFS += -DUSE_NETWORK
ifeq (,$(findstring Linux,$(OSTYPE))$(findstring Darwin,$(OSTYPE)))
$(info *** Warning ***)
$(info *** Warning *** Directly linking against libpcap is provides no measurable)
$(info *** Warning *** benefits over dynamically linking libpcap.)
$(info *** Warning ***)
$(info *** Warning *** Support for linking this way is currently deprecated and may be removed)
$(info *** Warning *** in the future.)
$(info *** Warning ***)
else
$(info *** Error ***)
$(info *** Error *** Directly linking against libpcap is provides no measurable)
$(info *** Error *** benefits over dynamically linking libpcap.)
$(info *** Error ***)
$(info *** Error *** Support for linking directly has been removed on the $(OSTYPE))
$(info *** Error *** platform.)
$(info *** Error ***)
$(error Retry your build without specifying USE_NETWORK=1)
endif
ifeq (cygwin,$(OSTYPE))
# cygwin has no ldconfig so explicitly specify pcap object library
NETWORK_LDFLAGS = -L$(dir $(call find_lib,$(PCAPLIB))) -Wl,-R,$(dir $(call find_lib,$(PCAPLIB))) -l$(PCAPLIB)
else
NETWORK_LDFLAGS = -l$(PCAPLIB)
endif
$(info using libpcap: $(call find_lib,$(PCAPLIB)) $(call find_include,pcap))
NETWORK_FEATURES = - static networking support using $(OSNAME) provided libpcap components
else # default build uses dynamic libpcap
NETWORK_CCDEFS += -DUSE_SHARED
$(info using libpcap: $(call find_include,pcap))
NETWORK_FEATURES = - dynamic networking support using $(OSNAME) provided libpcap components
endif
else
LIBEXTSAVE := ${LIBEXT}
LIBEXT = a
ifneq (,$(call find_lib,$(PCAPLIB)))
NETWORK_CCDEFS += -DUSE_NETWORK
NETWORK_LDFLAGS := -L$(dir $(call find_lib,$(PCAPLIB))) -l$(PCAPLIB)
NETWORK_FEATURES = - static networking support using $(OSNAME) provided libpcap components
$(info using libpcap: $(call find_lib,$(PCAPLIB)) $(call find_include,pcap))
endif
LIBEXT = $(LIBEXTSAVE)
ifeq (Darwin,$(OSTYPE)$(findstring USE_,$(NETWORK_CCDEFS)))
NETWORK_CCDEFS += -DUSE_SHARED
NETWORK_FEATURES = - dynamic networking support using $(OSNAME) provided libpcap components
$(info using macOS dynamic libpcap: $(call find_include,pcap))
endif
endif
else # pcap desired but pcap.h not found
ifneq (,$(call find_lib,$(PCAPLIB)))
PCAP_LIB_VERSION = $(shell strings $(call find_lib,$(PCAPLIB)) | grep 'libpcap version' | awk '{ print $$3}')
PCAP_LIB_BASE_VERSION = $(firstword $(subst ., ,$(PCAP_LIB_VERSION)))
endif
NEEDED_PKGS += DPKG_PCAP
# On non-Linux platforms, we'll still try to provide deprecated support for libpcap in /usr/local
INCPATHSAVE := ${INCPATH}
ifeq (,$(findstring Linux,$(OSTYPE)))
# Look for package built from tcpdump.org sources with default install target (or cygwin winpcap)
INCPATH += /usr/local/include
PCAP_H_FOUND = $(call find_include,pcap)
endif
ifneq (,$(strip $(PCAP_H_FOUND)))
endif
ifneq (,$(if $(DONT_USE_VMNET),,$(call find_include,vmnet.framework/Headers/vmnet)))
# sim_ether reduces network features to the appropriate minimal set
NETWORK_LAN_FEATURES += VMNET
NETWORK_CCDEFS += -DUSE_SHARED -I slirp -I slirp_glue -I slirp_glue/qemu -DHAVE_VMNET_NETWORK
NETWORK_DEPS += slirp/*.c slirp_glue/*.c
NETWORK_LDFLAGS += -framework vmnet
$(info using vmnet: $(call find_include,vmnet.framework/Headers/vmnet))
else
# Consider other network connections
ifneq (,$(call find_include,pcap))
ifneq (,$(shell grep 'pcap/pcap.h' $(call find_include,pcap) | grep include))
PCAP_H_PATH = $(dir $(call find_include,pcap))pcap/pcap.h
else
@@ -1042,107 +986,181 @@ ifeq (${WIN32},) #*nix Environments (&& cygwin)
ifneq (,$(shell grep pcap_compile $(PCAP_H_PATH) | grep const))
BPF_CONST_STRING = -DBPF_CONST_STRING
endif
LIBEXTSAVE := ${LIBEXT}
# first check if binary - shared objects are available/installed in the linker known search paths
NETWORK_CCDEFS += -DHAVE_PCAP_NETWORK -I$(dir $(call find_include,pcap)) $(BPF_CONST_STRING)
NETWORK_LAN_FEATURES += PCAP
ifneq (,$(call find_lib,$(PCAPLIB)))
NETWORK_CCDEFS = -DUSE_SHARED -I$(dir $(call find_include,pcap)) $(BPF_CONST_STRING)
NETWORK_FEATURES = - dynamic networking support using libpcap components from www.tcpdump.org and locally installed libpcap.${LIBEXT}
$(info using libpcap: $(call find_include,pcap))
ifneq ($(USE_NETWORK),) # Network support specified on the GNU make command line
NETWORK_CCDEFS += -DUSE_NETWORK
ifeq (,$(findstring Linux,$(OSTYPE))$(findstring Darwin,$(OSTYPE)))
$(info *** Warning ***)
$(info *** Warning *** Directly linking against libpcap is provides no measurable)
$(info *** Warning *** benefits over dynamically linking libpcap.)
$(info *** Warning ***)
$(info *** Warning *** Support for linking this way is currently deprecated and may be removed)
$(info *** Warning *** in the future.)
$(info *** Warning ***)
else
$(info *** Error ***)
$(info *** Error *** Directly linking against libpcap is provides no measurable)
$(info *** Error *** benefits over dynamically linking libpcap.)
$(info *** Error ***)
$(info *** Error *** Support for linking directly has been removed on the $(OSTYPE))
$(info *** Error *** platform.)
$(info *** Error ***)
$(error Retry your build without specifying USE_NETWORK=1)
endif
ifeq (cygwin,$(OSTYPE))
# cygwin has no ldconfig so explicitly specify pcap object library
NETWORK_LDFLAGS = -L$(dir $(call find_lib,$(PCAPLIB))) -Wl,-R,$(dir $(call find_lib,$(PCAPLIB))) -l$(PCAPLIB)
else
NETWORK_LDFLAGS = -l$(PCAPLIB)
endif
$(info using libpcap: $(call find_lib,$(PCAPLIB)) $(call find_include,pcap))
NETWORK_FEATURES = - static networking support using $(OSNAME) provided libpcap components
else # default build uses dynamic libpcap
NETWORK_CCDEFS += -DUSE_SHARED
$(info using libpcap: $(call find_include,pcap))
NETWORK_FEATURES = - dynamic networking support using $(OSNAME) provided libpcap components
endif
else
LIBPATH += /usr/local/lib
LIBEXTSAVE := ${LIBEXT}
LIBEXT = a
ifneq (,$(call find_lib,$(PCAPLIB)))
$(info using libpcap: $(call find_lib,$(PCAPLIB)) $(call find_include,pcap))
ifeq (cygwin,$(OSTYPE))
NETWORK_CCDEFS = -DUSE_NETWORK -DHAVE_PCAP_NETWORK -I$(dir $(call find_include,pcap)) $(BPF_CONST_STRING)
NETWORK_LDFLAGS = -L$(dir $(call find_lib,$(PCAPLIB))) -Wl,-R,$(dir $(call find_lib,$(PCAPLIB))) -l$(PCAPLIB)
NETWORK_FEATURES = - static networking support using libpcap components located in the cygwin directories
else
NETWORK_CCDEFS := -DUSE_NETWORK -DHAVE_PCAP_NETWORK -isystem -I$(dir $(call find_include,pcap)) $(BPF_CONST_STRING) $(call find_lib,$(PCAPLIB))
NETWORK_FEATURES = - networking support using libpcap components from www.tcpdump.org
$(info *** Warning ***)
$(info *** Warning *** $(BUILD_SINGLE)Simulator$(BUILD_MULTIPLE) being built with networking support using)
$(info *** Warning *** libpcap components from www.tcpdump.org.)
$(info *** Warning *** Some users have had problems using the www.tcpdump.org libpcap)
$(info *** Warning *** components for simh networking. For best results, with)
$(info *** Warning *** simh networking, it is recommended that you install the)
$(info *** Warning *** libpcap-dev (or libpcap-devel) package from your $(OSNAME) distribution)
$(info *** Warning ***)
$(info *** Warning *** Building with the components manually installed from www.tcpdump.org)
$(info *** Warning *** is officially deprecated. Attempting to do so is unsupported.)
$(info *** Warning ***)
endif
else
$(error using libpcap: $(call find_include,pcap) missing $(PCAPLIB).${LIBEXT})
endif
NETWORK_LAN_FEATURES += PCAP
endif
LIBEXT = $(LIBEXTSAVE)
else
INCPATH = $(INCPATHSAVE)
ifeq (1,$(PCAP_LIB_BASE_VERSION))
$(info using libpcap $(PCAP_LIB_VERSION) without an available pcap.h)
NETWORK_CCDEFS = -DUSE_SHARED -DHAVE_PCAP_NETWORK -DPCAP_LIB_VERSION=$(PCAP_LIB_VERSION)
NETWORK_FEATURES = - dynamic networking support using libpcap components from www.tcpdump.org and locally installed libpcap.${LIBEXT}
NETWORK_LAN_FEATURES += PCAP
NEEDED_PKGS := $(filter-out DPKG_PCAP,$(NEEDED_PKGS))
else
$(info *** Warning ***)
$(info *** Warning *** $(BUILD_SINGLE)Simulator$(BUILD_MULTIPLE) $(BUILD_MULTIPLE_VERB) being built WITHOUT)
$(info *** Warning *** libpcap networking support)
$(info *** Warning ***)
$(info *** Warning *** To build simulator(s) with libpcap networking support you)
$(info *** Warning *** should install the libpcap development components for)
$(info *** Warning *** for your $(OSNAME) system.)
ifeq (,$(or $(findstring Linux,$(OSTYPE)),$(findstring OSX,$(OSNAME))))
$(info *** Warning *** You should read 0readme_ethernet.txt and follow the instructions)
$(info *** Warning *** regarding the needed libpcap development components for your)
$(info *** Warning *** $(OSNAME) platform.)
endif
$(info *** Warning ***)
endif
endif
endif
# Consider other network connections
ifneq (,$(call find_lib,vdeplug))
# libvdeplug requires the use of the OS provided libpcap
ifeq (,$(findstring usr/local,$(NETWORK_CCDEFS)))
ifneq (,$(call find_include,libvdeplug))
# Provide support for vde networking
NETWORK_CCDEFS += -DHAVE_VDE_NETWORK
NETWORK_LAN_FEATURES += VDE
ifeq (,$(findstring USE_NETWORK,$(NETWORK_CCDEFS))$(findstring USE_SHARED,$(NETWORK_CCDEFS)))
NETWORK_CCDEFS += -DUSE_NETWORK
NETWORK_LDFLAGS := -L$(dir $(call find_lib,$(PCAPLIB))) -l$(PCAPLIB)
NETWORK_FEATURES = - static networking support using $(OSNAME) provided libpcap components
$(info using libpcap: $(call find_lib,$(PCAPLIB)) $(call find_include,pcap))
endif
ifeq (Darwin,$(OSTYPE))
NETWORK_LDFLAGS += -lvdeplug -L$(dir $(call find_lib,vdeplug))
LIBEXT = $(LIBEXTSAVE)
ifeq (Darwin,$(OSTYPE)$(findstring USE_,$(NETWORK_CCDEFS)))
NETWORK_CCDEFS +=
NETWORK_FEATURES = - dynamic networking support using $(OSNAME) provided libpcap components
$(info using macOS dynamic libpcap: $(call find_include,pcap))
endif
endif
else # pcap desired but pcap.h not found
ifneq (,$(call find_lib,$(PCAPLIB)))
PCAP_LIB_VERSION = $(shell strings $(call find_lib,$(PCAPLIB)) | grep 'libpcap version' | awk '{ print $$3}')
PCAP_LIB_BASE_VERSION = $(firstword $(subst ., ,$(PCAP_LIB_VERSION)))
endif
NEEDED_PKGS += DPKG_PCAP
# On non-Linux platforms, we'll still try to provide deprecated support for libpcap in /usr/local
INCPATHSAVE := ${INCPATH}
ifeq (,$(findstring Linux,$(OSTYPE)))
# Look for package built from tcpdump.org sources with default install target (or cygwin winpcap)
INCPATH += /usr/local/include
PCAP_H_FOUND = $(call find_include,pcap)
endif
ifneq (,$(strip $(PCAP_H_FOUND)))
ifneq (,$(shell grep 'pcap/pcap.h' $(call find_include,pcap) | grep include))
PCAP_H_PATH = $(dir $(call find_include,pcap))pcap/pcap.h
else
NETWORK_LDFLAGS += -lvdeplug -Wl,-R,$(dir $(call find_lib,vdeplug)) -L$(dir $(call find_lib,vdeplug))
PCAP_H_PATH = $(call find_include,pcap)
endif
ifneq (,$(shell grep pcap_compile $(PCAP_H_PATH) | grep const))
BPF_CONST_STRING = -DBPF_CONST_STRING
endif
LIBEXTSAVE := ${LIBEXT}
# first check if binary - shared objects are available/installed in the linker known search paths
ifneq (,$(call find_lib,$(PCAPLIB)))
NETWORK_CCDEFS = -DUSE_SHARED -I$(dir $(call find_include,pcap)) $(BPF_CONST_STRING)
NETWORK_FEATURES = - dynamic networking support using libpcap components from www.tcpdump.org and locally installed libpcap.${LIBEXT}
$(info using libpcap: $(call find_include,pcap))
else
LIBPATH += /usr/local/lib
LIBEXT = a
ifneq (,$(call find_lib,$(PCAPLIB)))
$(info using libpcap: $(call find_lib,$(PCAPLIB)) $(call find_include,pcap))
ifeq (cygwin,$(OSTYPE))
NETWORK_CCDEFS = -DUSE_NETWORK -DHAVE_PCAP_NETWORK -I$(dir $(call find_include,pcap)) $(BPF_CONST_STRING)
NETWORK_LDFLAGS = -L$(dir $(call find_lib,$(PCAPLIB))) -Wl,-R,$(dir $(call find_lib,$(PCAPLIB))) -l$(PCAPLIB)
NETWORK_FEATURES = - static networking support using libpcap components located in the cygwin directories
else
NETWORK_CCDEFS := -DUSE_NETWORK -DHAVE_PCAP_NETWORK -isystem -I$(dir $(call find_include,pcap)) $(BPF_CONST_STRING) $(call find_lib,$(PCAPLIB))
NETWORK_FEATURES = - networking support using libpcap components from www.tcpdump.org
$(info *** Warning ***)
$(info *** Warning *** $(BUILD_SINGLE)Simulator$(BUILD_MULTIPLE) being built with networking support using)
$(info *** Warning *** libpcap components from www.tcpdump.org.)
$(info *** Warning *** Some users have had problems using the www.tcpdump.org libpcap)
$(info *** Warning *** components for simh networking. For best results, with)
$(info *** Warning *** simh networking, it is recommended that you install the)
$(info *** Warning *** libpcap-dev (or libpcap-devel) package from your $(OSNAME) distribution)
$(info *** Warning ***)
$(info *** Warning *** Building with the components manually installed from www.tcpdump.org)
$(info *** Warning *** is officially deprecated. Attempting to do so is unsupported.)
$(info *** Warning ***)
endif
else
$(error using libpcap: $(call find_include,pcap) missing $(PCAPLIB).${LIBEXT})
endif
NETWORK_LAN_FEATURES += PCAP
endif
LIBEXT = $(LIBEXTSAVE)
else
INCPATH = $(INCPATHSAVE)
ifeq (1,$(PCAP_LIB_BASE_VERSION))
$(info using libpcap $(PCAP_LIB_VERSION) without an available pcap.h)
NETWORK_CCDEFS = -DUSE_SHARED -DHAVE_PCAP_NETWORK -DPCAP_LIB_VERSION=$(PCAP_LIB_VERSION)
NETWORK_FEATURES = - dynamic networking support using libpcap components from www.tcpdump.org and locally installed libpcap.${LIBEXT}
NETWORK_LAN_FEATURES += PCAP
NEEDED_PKGS := $(filter-out DPKG_PCAP,$(NEEDED_PKGS))
else
$(info *** Warning ***)
$(info *** Warning *** $(BUILD_SINGLE)Simulator$(BUILD_MULTIPLE) $(BUILD_MULTIPLE_VERB) being built WITHOUT)
$(info *** Warning *** libpcap networking support)
$(info *** Warning ***)
$(info *** Warning *** To build simulator(s) with libpcap networking support you)
$(info *** Warning *** should install the libpcap development components for)
$(info *** Warning *** for your $(OSNAME) system.)
ifeq (,$(or $(findstring Linux,$(OSTYPE)),$(findstring OSX,$(OSNAME))))
$(info *** Warning *** You should read 0readme_ethernet.txt and follow the instructions)
$(info *** Warning *** regarding the needed libpcap development components for your)
$(info *** Warning *** $(OSNAME) platform.)
endif
$(info *** Warning ***)
endif
endif
endif
ifneq (,$(call find_lib,vdeplug))
# libvdeplug requires the use of the OS provided libpcap
ifeq (,$(findstring usr/local,$(NETWORK_CCDEFS)))
ifneq (,$(call find_include,libvdeplug))
# Provide support for vde networking
NETWORK_CCDEFS += -DHAVE_VDE_NETWORK
NETWORK_LAN_FEATURES += VDE
ifeq (,$(findstring USE_NETWORK,$(NETWORK_CCDEFS))$(findstring USE_SHARED,$(NETWORK_CCDEFS)))
NETWORK_CCDEFS += -DUSE_SHARED
endif
ifeq (Darwin,$(OSTYPE))
NETWORK_LDFLAGS += -lvdeplug -L$(dir $(call find_lib,vdeplug))
else
NETWORK_LDFLAGS += -lvdeplug -Wl,-R,$(dir $(call find_lib,vdeplug)) -L$(dir $(call find_lib,vdeplug))
endif
$(info using libvdeplug: $(call find_lib,vdeplug) $(call find_include,libvdeplug))
endif
else
ifeq (,$(findstring PKG_PCAP, $(NEEDED_PKGS)))
NEEDED_PKGS += DPKG_PCAP
endif
$(info using libvdeplug: $(call find_lib,vdeplug) $(call find_include,libvdeplug))
endif
else
ifeq (,$(findstring PKG_PCAP, $(NEEDED_PKGS)))
NEEDED_PKGS += DPKG_PCAP
NEEDED_PKGS += DPKG_VDE
endif
ifneq (,$(call find_include,linux/if_tun))
# Provide support for Tap networking on Linux
NETWORK_CCDEFS += -DHAVE_TAP_NETWORK
NETWORK_LAN_FEATURES += TAP
ifeq (,$(findstring USE_NETWORK,$(NETWORK_CCDEFS))$(findstring USE_SHARED,$(NETWORK_CCDEFS)))
NETWORK_CCDEFS += -DUSE_NETWORK
endif
endif
else
NEEDED_PKGS += DPKG_VDE
endif
ifneq (,$(call find_include,linux/if_tun))
# Provide support for Tap networking on Linux
NETWORK_CCDEFS += -DHAVE_TAP_NETWORK
NETWORK_LAN_FEATURES += TAP
ifeq (,$(findstring USE_NETWORK,$(NETWORK_CCDEFS))$(findstring USE_SHARED,$(NETWORK_CCDEFS)))
NETWORK_CCDEFS += -DUSE_NETWORK
endif
endif
ifeq (bsdtuntap,$(shell if ${TEST} -e /usr/include/net/if_tun.h -o -e /Library/Extensions/tap.kext -o -e /Applications/Tunnelblick.app/Contents/Resources/tap-notarized.kext; then echo bsdtuntap; fi))
# Provide support for Tap networking on BSD platforms (including OS X)
NETWORK_CCDEFS += -DHAVE_TAP_NETWORK -DHAVE_BSDTUNTAP
NETWORK_LAN_FEATURES += TAP
ifeq (,$(findstring USE_NETWORK,$(NETWORK_CCDEFS))$(findstring USE_SHARED,$(NETWORK_CCDEFS)))
NETWORK_CCDEFS += -DUSE_NETWORK
ifeq (bsdtuntap,$(shell if ${TEST} -e /usr/include/net/if_tun.h -o -e /Library/Extensions/tap.kext -o -e /Applications/Tunnelblick.app/Contents/Resources/tap-notarized.kext; then echo bsdtuntap; fi))
# Provide support for Tap networking on BSD platforms (including OS X)
NETWORK_CCDEFS += -DHAVE_TAP_NETWORK -DHAVE_BSDTUNTAP
NETWORK_LAN_FEATURES += TAP
ifeq (,$(findstring USE_NETWORK,$(NETWORK_CCDEFS))$(findstring USE_SHARED,$(NETWORK_CCDEFS)))
NETWORK_CCDEFS += -DUSE_NETWORK
endif
endif
endif
ifeq (slirp,$(shell if ${TEST} -e slirp_glue/sim_slirp.c; then echo slirp; fi))