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# Copyright 1999-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

LUA_COMPAT=( lua5-1 luajit )
PYTHON_COMPAT=( python3_{10..12} )

inherit autotools flag-o-matic linux-info lua-single python-single-r1 systemd tmpfiles verify-sig

DESCRIPTION="High performance Network IDS, IPS and Network Security Monitoring engine"
HOMEPAGE="https://suricata.io/"
SRC_URI="https://www.openinfosecfoundation.org/download/${P}.tar.gz
	verify-sig? ( https://www.openinfosecfoundation.org/download/${P}.tar.gz.sig )"

LICENSE="GPL-2"
SLOT="0/7"
KEYWORDS="~amd64 ~riscv ~x86"
IUSE="+af-packet af-xdp bpf control-socket cuda debug +detection geoip hardened hyperscan lua lz4 nflog +nfqueue redis systemd test"
VERIFY_SIG_OPENPGP_KEY_PATH="/usr/share/openpgp-keys/openinfosecfoundation.org.asc"

RESTRICT="!test? ( test )"

REQUIRED_USE="${PYTHON_REQUIRED_USE}
	af-xdp? ( bpf )
	bpf? ( af-packet )
	lua? ( ${LUA_REQUIRED_USE} )"

RDEPEND="${PYTHON_DEPS}
	acct-group/suricata
	acct-user/suricata
	dev-libs/jansson:=
	dev-libs/libpcre2
	dev-libs/libyaml
	net-libs/libnet:*
	net-libs/libnfnetlink
	dev-libs/nspr
	dev-libs/nss
	$(python_gen_cond_dep '
		dev-python/pyyaml[${PYTHON_USEDEP}]
	')
	>=net-libs/libhtp-0.5.48
	net-libs/libpcap
	sys-apps/file
	sys-libs/libcap-ng
	af-xdp?		( net-libs/xdp-tools )
	bpf?        ( dev-libs/libbpf )
	cuda?       ( dev-util/nvidia-cuda-toolkit )
	geoip?      ( dev-libs/libmaxminddb:= )
	hyperscan?  ( dev-libs/vectorscan:= )
	lua?        ( ${LUA_DEPS} )
	lz4?        ( app-arch/lz4 )
	nflog?      ( net-libs/libnetfilter_log )
	nfqueue?    ( net-libs/libnetfilter_queue )
	redis?      ( dev-libs/hiredis:= )"
DEPEND="${RDEPEND}
	>=dev-build/autoconf-2.69-r5
	virtual/rust"
BDEPEND="verify-sig? ( >=sec-keys/openpgp-keys-oisf-20200807 )"

PATCHES=(
	"${FILESDIR}/${PN}-5.0.1_configure-no-lz4-automagic.patch"
	"${FILESDIR}/${PN}-5.0.7_configure-no-hyperscan-automagic.patch"
	"${FILESDIR}/${PN}-6.0.0_default-config.patch"
	"${FILESDIR}/${PN}-7.0.2_configure-no-sphinx-pdflatex-automagic.patch"
	"${FILESDIR}/${PN}-7.0.5_configure-fortify_source.patch"
)

pkg_pretend() {
	if use af-xdp && use kernel_linux; then
		if kernel_is -lt 4 18; then
			ewarn "Kernel 4.18 or newer is required for AF_XDP"
		fi
	fi

	if use bpf && use kernel_linux; then
		if kernel_is -lt 4 15; then
			ewarn "Kernel 4.15 or newer is necessary to use all XDP features like the CPU redirect map"
		fi

		CONFIG_CHECK="~XDP_SOCKETS"
		ERROR_XDP_SOCKETS="CONFIG_XDP_SOCKETS is not set, making it impossible for Suricata to load XDP programs. "
		ERROR_XDP_SOCKETS+="Other eBPF features should work normally."
		check_extra_config
	fi
}

src_prepare() {
	default
	sed -ie 's/docdir =.*/docdir = ${datarootdir}\/doc\/'${PF}'\//' "${S}/doc/Makefile.am" || die
	eautoreconf
}

src_configure() {
	# Bug #861242
	filter-lto

	local myeconfargs=(
		"--localstatedir=/var" \
		"--runstatedir=/run" \
		"--enable-non-bundled-htp" \
		"--enable-gccmarch-native=no" \
		"--enable-python" \
		$(use_enable af-packet) \
		$(use_enable af-xdp) \
		$(use_enable bpf ebpf) \
		$(use_enable control-socket unix-socket) \
		$(use_enable cuda) \
		$(use_enable detection) \
		$(use_enable geoip) \
		$(use_enable hardened gccprotect) \
		$(use_enable hardened pie) \
		$(use_enable hyperscan) \
		$(use_enable lz4) \
		$(use_enable nflog) \
		$(use_enable nfqueue) \
		$(use_enable redis hiredis) \
		$(use_enable test unittests) \
		"--disable-coccinelle"
	)
	if use lua; then
		if use lua_single_target_luajit; then
			myeconfargs+=( --enable-luajit )
		else
			myeconfargs+=( --enable-lua )
		fi
	fi

	if use debug; then
		myeconfargs+=( $(use_enable debug) )
		# so we can get a backtrace according to "reporting bugs" on upstream web site
		QA_FLAGS_IGNORED="usr/bin/${PN}"
		CFLAGS="-ggdb -O0" econf ${myeconfargs[@]}
	else
		econf ${myeconfargs[@]}
	fi
}

src_install() {
	emake DESTDIR="${D}" install
	python_optimize
	# Bug #878855
	python_fix_shebang "${ED}"/usr/bin/

	if use bpf; then
		rm -f ebpf/Makefile.{am,in} || die
		dodoc -r ebpf/
		keepdir /usr/libexec/suricata/ebpf
	fi

	insinto "/etc/${PN}"
	doins etc/{classification,reference}.config threshold.config suricata.yaml

	keepdir "/var/lib/${PN}/rules" "/var/lib/${PN}/update"
	keepdir "/var/log/${PN}"

	fowners -R ${PN}: "/var/lib/${PN}" "/var/log/${PN}" "/etc/${PN}"
	fperms 750 "/var/lib/${PN}" "/var/log/${PN}" "/etc/${PN}"
	fperms 6750 "/var/lib/${PN}/rules" "/var/lib/${PN}/update"

	newinitd "${FILESDIR}/${PN}.initd" ${PN}
	newconfd "${FILESDIR}/${PN}.confd" ${PN}
	systemd_dounit "${FILESDIR}"/${PN}.service
	newtmpfiles "${FILESDIR}"/${PN}.tmpfiles ${PN}.conf

	insopts -m0644
	insinto /etc/logrotate.d
	newins etc/${PN}.logrotate ${PN}
}

pkg_postinst() {
	tmpfiles_process ${PN}.conf

	elog
	if use systemd; then
		elog "Suricata requires either the mode of operation (e.g. --af-packet) or the interface to listen on (e.g. -i eth0)"
		elog "to be specified on the command line. The provided systemd unit launches Suricata in af-packet mode and relies"
		elog "on file configuration to specify interfaces, should you prefer to run it differently you will have to customise"
		elog "said unit. The simplest way of doing it is to override the Environment=OPTIONS='...' line using a .conf file"
		elog "placed in the directory ${EPREFIX}/etc/systemd/system/suricata.service.d/ ."
		elog "For details, see the section on drop-in directories in systemd.unit(5)."
	else
		elog "The ${PN} init script expects to find the path to the configuration"
		elog "file as well as extra options in /etc/conf.d."
		elog
		elog "To create more than one ${PN} service, simply create a new .yaml file for it"
		elog "then create a symlink to the init script from a link called"
		elog "${PN}.foo - like so"
		elog "   cd /etc/${PN}"
		elog "   ${EDITOR##*/} suricata-foo.yaml"
		elog "   cd /etc/init.d"
		elog "   ln -s ${PN} ${PN}.foo"
		elog "Then edit /etc/conf.d/${PN} and make sure you specify sensible options for foo."
		elog
		elog "You can create as many ${PN}.foo* services as you wish."
	fi

	if use bpf; then
		elog
		elog "eBPF/XDP files must be compiled (using sys-devel/clang[llvm_targets_BPF]) before use"
		elog "because their configuration is hard-coded. You can find the default ones in"
		elog "    ${EPREFIX}/usr/share/doc/${PF}/ebpf"
		elog "and the common location for eBPF bytecode is"
		elog "    ${EPREFIX}/usr/libexec/${PN}"
		elog "For more information, see https://${PN}.readthedocs.io/en/${P}/capture-hardware/ebpf-xdp.html"
	fi

	if use debug; then
		elog
		elog "You have enabled the debug USE flag. Please read this link to report bugs upstream:"
		elog "https://redmine.openinfosecfoundation.org/projects/suricata/wiki/Reporting_Bugs"
		elog "You need to also ensure the FEATURES variable in make.conf contains the"
		elog "'nostrip' option to produce useful core dumps or back traces."
	fi

	elog
	if [[ -z "${REPLACING_VERSIONS}" ]]; then
		elog "To download and install an initial set of rules, run:"
		elog "    suricata-update"
	fi
	elog
}