RIOT/examples/gnrc_border_router/Makefile.native.conf

# native has a TAP interface towards the host, just add parameters for
# `socket_zep`
ZEP_PORT_BASE ?= 17754
ZEP_PORT_MAX := $(shell expr $(ZEP_PORT_BASE) + $(ZEP_DEVICES) - 1)

CFLAGS += -DSOCKET_ZEP_MAX=$(ZEP_DEVICES)
CFLAGS += -DASYNC_READ_NUMOF=$(shell expr $(ZEP_DEVICES) + 1)
CFLAGS += -DCONFIG_DHCPV6_CLIENT_PFX_LEASE_MAX=$(ZEP_DEVICES)

# Set CFLAGS if not being set via Kconfig
CFLAGS += $(if $(CONFIG_KCONFIG_MODULE_DHCPV6),,-DCONFIG_DHCPV6_CLIENT_PFX_LEASE_MAX=$(ZEP_DEVICES))

# create a new TAP interface if not re-using an existing one
ifneq (1, $(REUSE_TAP))
  FLAGS_EXTRAS += --create-tap
  ifeq (dhcpv6,$(PREFIX_CONF))
    FLAGS_EXTRAS += --use-dhcpv6
  else ifeq (auto_subnets,$(PREFIX_CONF))
    FLAGS_EXTRAS += --use-radvd
  endif
endif

# enable the ZEP dispatcher
FLAGS_EXTRAS += -z $(ZEP_PORT_BASE)

ifneq (, $(ZEP_TOPO_FILE))
  FLAGS_EXTRAS += --topology $(ZEP_TOPO_FILE)
endif

ifeq (1, $(ZEP_MONITOR))
  FLAGS_EXTRAS += --monitor
endif

# Configure terminal parameters
TERMDEPS += host-tools
TERMPROG_FLAGS = $(FLAGS_EXTRAS) $(ELFFILE) $(IPV6_PREFIX)
RIOT_TERMINAL ?= native
TERMPROG ?= sudo $(RIOTTOOLS)/zep_dispatch/start_network.sh $(TERMPROG_FLAGS)

# -z [::1]:$PORT for each ZEP device
TERMFLAGS ?= $(patsubst %,-z [::1]:%, $(shell seq $(ZEP_PORT_BASE) $(ZEP_PORT_MAX)))

# native uses $PORT to specify the TAP interface
PORT ?= $(TAP)