# The MIT License (MIT)
#
# Copyright (C) 2026 Scott Duensing
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
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#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.

# Networking library suite -- the whole of dvxnet (lwIP, the BSD socket
# layer, name lookups, configuration, BASIC functions) built for the host
# and run for real:
#
#   loopback   TCP and UDP through 127.0.0.1 (lwIP's loopback interface)
#   BASIC      the settings / status functions of net.bas, also from a
#              program compiled with the real net.bas and prefs.bas
#   wire       a second process runs another copy of the stack as the
#              "other computer" (DHCP server, DNS server, echo server)
#              at the far end of a socket pair that stands in for the
#              Ethernet cable; the local end is a fake packet driver
#              feeding the real receive ring (fakeDrv.c)
#
# The library's BSD names would clash with the host C library's, so its
# sources and the test are built with netHostNames.h force-included
# (socket -> netHostSocket, ...).  hostFd.c stands in for the DOS file
# descriptor layer (netDos.c), fakeDrv.c for pktDrvDos.c.

include ../dvxtest/dvxtest.mk

.DEFAULT_GOAL := all

NETDIR     = $(DVXTEST_ROOT)/src/libs/kpunch/dvxnet
SEC_DIR    = $(DVXTEST_ROOT)/src/libs/kpunch/crypto
LWIP_DIR   = $(NETDIR)/thirdparty/lwip/src
BINDIR     = $(DVXTEST_BINDIR)/net
NET_TEST   = $(BINDIR)/netTest

# The library's own sources minus the DOS-only ones.
NET_SRCS   = $(filter-out $(NETDIR)/netDos.c $(NETDIR)/netOrder.c $(NETDIR)/pktDrvDos.c,$(wildcard $(NETDIR)/*.c))
LWIP_SRCS  = $(wildcard $(LWIP_DIR)/core/*.c) $(wildcard $(LWIP_DIR)/core/ipv4/*.c) $(LWIP_DIR)/netif/ethernet.c
NET_OBJS   = $(patsubst $(NETDIR)/%.c,$(BINDIR)/net/%.o,$(NET_SRCS))
LWIP_OBJS  = $(patsubst $(LWIP_DIR)/%.c,$(BINDIR)/lwip/%.o,$(LWIP_SRCS))
# The security library's generator (netStackRand)
SEC_OBJS   = $(BINDIR)/sec/security.o $(BINDIR)/sec/secHash.o
HOST_OBJS  = $(BINDIR)/hostFd.o $(BINDIR)/fakeDrv.o
LIBS_A     = $(DVXTEST_ARCHIVES) $(DVXTEST_TASKS_A) $(DVXTEST_BASRT_A)

# Standard names renamed; plain (non-GNU, unfortified) prototypes so the
# library's definitions match the C library's declarations.  lwIP counts
# its pools' use (NET_POOL_STATS, port/lwipopts.h) for the pools case.
NET_INCS   = -I. -I$(NETDIR) -I$(NETDIR)/port -I$(LWIP_DIR)/include -I$(DVXTEST_ROOT)/src/libs/kpunch/dvxshell
NET_CFLAGS = $(DVXTEST_CFLAGS) -DNET_POOL_STATS $(NET_INCS) -I$(DVXTEST_BASICDIR) -DBASIC_INCLUDE_DIR='"$(DVXTEST_ROOT)/src/include/basic"' -U_GNU_SOURCE -D_DEFAULT_SOURCE -U_FORTIFY_SOURCE -include netHostNames.h
DRV_CFLAGS = $(DVXTEST_CFLAGS) -DNET_POOL_STATS $(NET_INCS)

.PHONY: all run clean

all: run

$(BINDIR)/net/%.o: $(NETDIR)/%.c $(DVX_MAKEFILES) netHostNames.h
	@mkdir -p $(dir $@)
	$(HOSTCC) $(NET_CFLAGS) -c -o $@ $<

$(BINDIR)/lwip/%.o: $(LWIP_DIR)/%.c $(DVX_MAKEFILES)
	@mkdir -p $(dir $@)
	$(HOSTCC) $(DRV_CFLAGS) -c -o $@ $<

$(BINDIR)/sec/%.o: $(SEC_DIR)/%.c $(DVX_MAKEFILES)
	@mkdir -p $(dir $@)
	$(HOSTCC) $(DRV_CFLAGS) -c -o $@ $<

$(BINDIR)/hostFd.o: hostFd.c $(DVX_MAKEFILES) netHostNames.h
	@mkdir -p $(BINDIR)
	$(HOSTCC) $(NET_CFLAGS) -c -o $@ $<

$(BINDIR)/fakeDrv.o: fakeDrv.c $(DVX_MAKEFILES)
	@mkdir -p $(BINDIR)
	$(HOSTCC) $(DRV_CFLAGS) -c -o $@ $<

$(NET_TEST): netTest.c $(NET_OBJS) $(LWIP_OBJS) $(SEC_OBJS) $(HOST_OBJS) $(DVX_MAKEFILES) $(LIBS_A) | dvxtest-libs
	@mkdir -p $(BINDIR)
	$(HOSTCC) $(NET_CFLAGS) -o $@ $< $(NET_OBJS) $(LWIP_OBJS) $(SEC_OBJS) $(HOST_OBJS) $(DVXTEST_BASRT_A) $(DVXTEST_LDFLAGS) -Wl,--whole-archive $(DVXTEST_LIBDVX_A) $(DVXTEST_TASKS_A) $(DVXTEST_LIB) -Wl,--no-whole-archive -ldl -lm

-include $(NET_OBJS:.o=.d) $(LWIP_OBJS:.o=.d) $(SEC_OBJS:.o=.d) $(HOST_OBJS:.o=.d) $(NET_TEST).d

run: $(NET_TEST)
	cd $(BINDIR) && ASAN_OPTIONS=detect_leaks=1 ./netTest

clean:
	rm -rf $(BINDIR)
