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Merge commit '23fa869d867cc0c5083a55e6c8baff1dc222d5e9' as 'einat-ebpf'

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bgme 2025-04-21 13:52:45 +08:00
parent aaf389e150 23fa869d86
commit 4449cad239
9 changed files with 794 additions and 0 deletions

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einat-ebpf/.github/workflows/calculate.yml vendored Normal file
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name: Calculating PKG_MIRROR_HASH
on:
workflow_dispatch:
inputs:
target_version:
description: 'Target OpenWrt version. if empty the simple mode will be used.'
required: false
type: string
jobs:
check:
name: Calculating PKG_MIRROR_HASH of XX
runs-on: ubuntu-latest
permissions:
contents: write # To push a branch
steps:
- uses: actions/checkout@v4
with:
ref: ${{ github.ref_name }}
fetch-depth: 0
- uses: muink/openwrt-package-mirror-hash-calculator@main
env:
COMMIT_TOKEN: ${{ secrets.GITHUB_TOKEN }}
MAKEFILE: Makefile
TARGET_VERSION: ${{ inputs.target_version }}

13
einat-ebpf/.prepare.sh Executable file
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VERSION="$1"
CURDIR="$2"
BIN_PATH="$3"
if [ -d "$CURDIR/.git" ]; then
config="$CURDIR/.git/config"
else
config="$(sed "s|^gitdir:\s*|$CURDIR/|;s|$|/config|" "$CURDIR/.git")"
fi
[ -n "$(sed -En '/^\[remote /{h;:top;n;/^\[/b;s,(https?://gitcode\.(com|net)),\1,;T top;H;x;s|\n\s*|: |;p;}' "$config")" ] && {
echo -e "#!/bin/sh\necho $VERSION" > "$BIN_PATH"
}
exit 0

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einat-ebpf/LICENSE Normal file
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

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# SPDX-License-Identifier: GPL-2.0-only
#
# Copyright (C) 2024-2025 Anya Lin <hukk1996@gmail.com>
include $(TOPDIR)/rules.mk
PKG_NAME:=einat-ebpf
PKG_UPSTREAM_VERSION:=0.1.8
PKG_UPSTREAM_GITHASH:=
PKG_VERSION:=$(PKG_UPSTREAM_VERSION)$(if $(PKG_UPSTREAM_GITHASH),~$(call version_abbrev,$(PKG_UPSTREAM_GITHASH)))
PKG_RELEASE:=1
PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_UPSTREAM_VERSION)
PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_SOURCE_SUBDIR)
ifeq ($(PKG_UPSTREAM_GITHASH),)
PKG_SOURCE_URL:=https://codeload.github.com/EHfive/einat-ebpf/tar.gz/refs/tags/v$(PKG_UPSTREAM_VERSION)?
PKG_HASH:=3e47810e852dbad4cffeee1df8d3fea4018e4bda331ffc72f8e9a88f3c73d034
PKG_SOURCE:=$(PKG_SOURCE_SUBDIR).tar.gz
else
PKG_SOURCE_PROTO:=git
PKG_SOURCE_URL:=https://github.com/EHfive/einat-ebpf.git
PKG_SOURCE_VERSION:=$(PKG_UPSTREAM_GITHASH)
PKG_MIRROR_HASH:=6cc83cb1fb80896bb4c3d364d88e6009de0f05cf77373f1f18b1181057b6eff5
PKG_SOURCE:=$(PKG_SOURCE_SUBDIR)-$(PKG_SOURCE_VERSION).tar.gz
endif
PKG_MAINTAINER:=Anya Lin <hukk1996@gmail.com>
PKG_LICENSE:=GPL-2.0-or-later GPL-2.0-only
PKG_LICENSE_FILES:=LICENSE
PKG_BUILD_DEPENDS:=rust/host libbpf #HAS_BPF_TOOLCHAIN:bpf-headers # requires modified kernel
PKG_BUILD_PARALLEL:=1
PKG_BUILD_FLAGS:=no-mips16
PKG_CONFIG_DEPENDS+= \
CONFIG_EINAT_EBPF_IPV6 \
CONFIG_EINAT_EBPF_BACKEND_LIBBPF \
CONFIG_EINAT_EBPF_BINDGEN \
CONFIG_EINAT_EBPF_STATIC \
RUST_PKG_FEATURES:=$(subst $(space),$(comma),$(strip \
$(if $(CONFIG_EINAT_EBPF_IPV6),ipv6) \
$(if $(CONFIG_EINAT_EBPF_BACKEND_LIBBPF),libbpf) \
$(if $(CONFIG_EINAT_EBPF_BINDGEN),bindgen) \
$(if $(CONFIG_EINAT_EBPF_STATIC),static) \
))
#export EINAT_BPF_CFLAGS="-I/usr/include/aarch64-linux-gnu"
include $(INCLUDE_DIR)/bpf.mk
include $(INCLUDE_DIR)/package.mk
include $(TOPDIR)/feeds/packages/lang/rust/rust-package.mk
# Don't ignore Cargo.lock
Build/Compile:=$(call Build/Compile/Cargo,,--locked)
# The LLVM_PATH var is required so that einat's build script finds llvm-strip
TARGET_PATH_PKG:=$(LLVM_PATH):$(TARGET_PATH_PKG)
# Platform-specific features
# $(TOPDIR)/feeds/packages/lang/rust/rust-values.mk
# RUST_ARCH_DEPENDS:=@(aarch64||arm||i386||i686||mips||mipsel||mips64||mips64el||powerpc64||riscv64||x86_64)
EINAT_EBPF_RUST_ARCH_DEPENDS:=@(aarch64||arm||i386||i686||powerpc64||riscv64||x86_64) # Architectures other than x86_64 and aarch64 have not been tested.
define Package/$(PKG_NAME)
SECTION:=net
CATEGORY:=Network
SUBMENU:=Routing and Redirection
TITLE:=eBPF-based Endpoint-Independent NAT
URL:=https://github.com/EHfive/einat-ebpf
# You need enable KERNEL_DEBUG_INFO_BTF and disable KERNEL_DEBUG_INFO_REDUCED
DEPENDS:=$(EINAT_EBPF_RUST_ARCH_DEPENDS) $(BPF_DEPENDS) \
+kmod-sched-core +kmod-sched-bpf \
+EINAT_EBPF_BACKEND_LIBBPF:libbpf \
+@KERNEL_DEBUG_FS +@KERNEL_DEBUG_INFO_BTF
USERID:=einat:einat
PROVIDES:=einat
endef
define Package/$(PKG_NAME)/description
This eBPF application implements an "Endpoint-Independent Mapping" and
"Endpoint-Independent Filtering" NAT(network address translation) on
TC egress and ingress hooks.
endef
define Package/$(PKG_NAME)/config
menu "Features configuration"
depends on PACKAGE_einat-ebpf
config EINAT_EBPF_IPV6
bool "Enable IPV6 NAT66 feature"
default n
help
It would increase load time of eBPF programs to
about 4 times.
config EINAT_EBPF_BACKEND_LIBBPF
bool "Enable libbpf backend"
default y if (aarch64 || x86_64)
default n
help
Add fallback BPF loading backend: "libbpf".
config EINAT_EBPF_BINDGEN
bool "Enable bindgen"
default y if !ARCH_64BIT
default n
help
Bindgen for libbpf headers, required on 32-bit
platforms.
config EINAT_EBPF_STATIC
bool "Enable static compile"
default n
endmenu
endef
define Package/$(PKG_NAME)/conffiles
/etc/config/einat
endef
define Package/$(PKG_NAME)/install
$(CURDIR)/.prepare.sh $(VERSION) $(CURDIR) $(PKG_INSTALL_DIR)/bin/einat
$(INSTALL_DIR) $(1)/usr/bin/
$(INSTALL_BIN) $(PKG_INSTALL_DIR)/bin/einat $(1)/usr/bin/
$(INSTALL_DIR) $(1)/etc/init.d/
$(INSTALL_BIN) $(CURDIR)/files/einat.init $(1)/etc/init.d/einat
$(INSTALL_DIR) $(1)/etc/config/
$(INSTALL_CONF) $(CURDIR)/files/einat.config $(1)/etc/config/einat
$(INSTALL_DIR) $(1)/etc/capabilities/
$(INSTALL_CONF) $(CURDIR)/files/capabilities.json $(1)/etc/capabilities/einat.json
endef
$(eval $(call RustBinPackage,$(PKG_NAME)))
$(eval $(call BuildPackage,$(PKG_NAME)))

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# openwrt-einat-ebpf
eBPF-based Endpoint-Independent NAT
> The [einat-ebpf][] is a eBPF application implements an "Endpoint-Independent Mapping" and "Endpoint-Independent Filtering" NAT(network address translation) on TC egress and ingress hooks.
## Requirements
- Target Linux kernel >= 5.15
- Target Linux kernel has the following kernel configuration enabled
```
CONFIG_BPF_EVENTS=y
CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_INFO_REDUCED=n
CONFIG_DEBUG_INFO_BTF=y
```
- You can install `kmod-ikconfig`, use command `zcat /proc/config.gz | grep -E "(CONFIG_BPF_EVENTS|CONFIG_DEBUG_KERNEL|CONFIG_DEBUG_INFO|CONFIG_DEBUG_INFO_REDUCED|CONFIG_DEBUG_INFO_BTF|CONFIG_BPF_SYSCALL|CONFIG_BPF_JIT)"` to confirm
- If it does not match, you need add the following configuration to the `.config` and rebuild the target kernel
```
CONFIG_KERNEL_BPF_EVENTS=y
CONFIG_KERNEL_DEBUG_KERNEL=y
CONFIG_KERNEL_DEBUG_INFO=y
CONFIG_KERNEL_DEBUG_INFO_REDUCED=n
CONFIG_KERNEL_DEBUG_INFO_BTF=y
```
- Currently are known [immortalwrt][] and [fantastic-rebuild][] is enabled these options
## Releases
You can find the prebuilt-ipks [here](https://fantastic-packages.github.io/packages/) \
And LuCI can be found here [luci-app-einat][]
## Additional Features
Support for enabling additional features at build. Including but not limited to `ipv6, static, ...` \
For details, see [define Package/$(PKG_NAME)/config](https://github.com/muink/openwrt-einat-ebpf/blob/master/Makefile#L89)
## Build
```shell
# Build system setup
# Please refer to [Build system setup](https://openwrt.org/docs/guide-developer/toolchain/install-buildsystem)
sudo apt install libelf-dev zlib1g-dev
# Take the x86_64 platform as an example
tar xjf rebuild-sdk-23.05.3-x86-64_gcc-12.3.0_musl.Linux-x86_64.tar.xz
# Go to the SDK root dir
cd rebuild-sdk-*-x86_64_*
# Install prebuilt llvm-bpf
tar xjf llvm-bpf-*.Linux-x86_64.tar.xz
# First run to generate a .config file
./scripts/feeds update -a
./scripts/feeds install -a
make menuconfig
# Get Makefile
git clone --depth 1 --branch master --single-branch --no-checkout https://github.com/muink/openwrt-einat-ebpf.git package/einat-ebpf
pushd package/einat-ebpf
umask 022
git checkout
popd
# Select the package Network -> Routing and Redirection -> einat-ebpf
make menuconfig
# Start compiling
make package/einat-ebpf/compile V=s BUILD_LOG=y -j$(nproc)
```
[einat-ebpf]: https://github.com/EHfive/einat-ebpf
[luci-app-einat]: https://github.com/muink/luci-app-einat
[immortalwrt]: https://github.com/immortalwrt/immortalwrt
[fantastic-rebuild]: https://github.com/fantastic-packages/rebuild
## License
This project is licensed under the [GPL-2.0](https://www.gnu.org/licenses/gpl-2.0.html)

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{
"ambient": [
"CAP_SYS_ADMIN",
"CAP_NET_ADMIN"
],
"bounding": [
"CAP_SYS_ADMIN",
"CAP_NET_ADMIN"
]
}

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config einat 'config'
option enabled '0'
option bpf_log_level '0'
option nat44 '1'
option ifname 'eth1'
option ports '20000-29999'
option hairpin_enabled '0'
list hairpinif 'lo'
list hairpinif 'br-lan'
list internal_subnets '192.168.0.0/16'
list internal_subnets '172.16.0.0/12'
list internal_subnets '10.0.0.0/8'

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einat-ebpf/files/einat.init Normal file
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#!/bin/sh /etc/rc.common
. "${IPKG_INSTROOT}/lib/functions/network.sh"
START=60
STOP=60
USE_PROCD=1
# einat
CONF=einat
CONFIGSECTION=config
PROG=/usr/bin/einat
config_load "$CONF"
network_find_wan DEF_WAN true
network_find_wan6 DEF_WAN6 true
load_interfaces() {
local n ifname hairpin_enabled hairpinif
config_get ifname "$1" ifname
config_get hairpinif "$1" hairpinif
[ "$hairpin_enabled" = 1 ] && ifname="$ifname $hairpinif"
for n in $ifname; do
interfaces=" $(uci -q show network|grep "device='$n'"|cut -f2 -d'.') $interfaces"
done
}
validate_section_config() {
uci_load_validate "$CONF" "$CONFIGSECTION" "$1" "$2" \
'enabled:bool:0' \
'bpf_log_level:range(0, 5):0' \
'bpf_loader:or("aya", "libbpf")' \
'nat44:bool:1' \
'nat66:bool:0' \
'ifname:network' \
'ports:portrange:20000-29999' \
'internal_ifaces:list(network)' \
'internal_subnets:list(cidr)' \
'hairpin_enabled:bool:0' \
'hairpinif:list(network)'
}
einat_instance() {
procd_open_instance "$CONF"
procd_set_param command "$PROG" \
--bpf-log "$bpf_log_level" \
${bpf_loader:+--bpf-loader "$bpf_loader"} \
-i "$ifname" \
--ports "$ports"
[ "$nat44" = 1 ] && procd_append_param command --nat44
#[ "$nat66" = 1 ] && procd_append_param command --nat66
local subnets internal_iface
for internal_iface in $internal_ifaces; do
network_get_subnets subnets $internal_iface
internal_subnets="${subnets:+$subnets }$internal_subnets"
done
[ -z "$internal_subnets" ] || procd_append_param command --internal $internal_subnets
procd_append_param netdev "$ifname"
if [ "$hairpin_enabled" = 1 -a -n "$hairpinif" ]; then
procd_append_param command --hairpin-if lo $hairpinif
for n in $hairpinif; do
procd_append_param netdev "$n"
done
fi
#procd_set_param capabilities "/etc/capabilities/einat.json"
procd_set_param stdout 1
procd_set_param stderr 1
procd_set_param respawn
procd_open_data
# configure firewall
json_add_array firewall
# IPv4 input (Optional. Relax the localhost firewall)
#json_add_object ''
#json_add_string type rule
#json_add_string target 'ACCEPT'
#json_add_string name "Relax input limits"
#json_add_string family 'ipv4'
#json_add_string proto 'tcp udp'
#json_add_string src "$(fw4 -q device $ifname)"
#json_add_string dest_port "$ports"
#json_close_object
# IPv4 accept forward wan -> lan
json_add_object ''
json_add_string type rule
json_add_string target 'ACCEPT'
json_add_string name "Forward wan 2 lan"
json_add_string family 'ipv4'
json_add_string proto 'tcp udp icmp'
json_add_string src "$(fw4 -q device $ifname)"
json_add_string dest "$(fw4 -q device br-lan)"
json_close_object
# IPv4 disable Masquerade
json_add_object ''
json_add_string type nat
json_add_string target 'ACCEPT'
json_add_string name "Disable Masquerade"
json_add_string family 'ipv4'
json_add_string proto 'tcp udp icmp'
json_add_string src "$(fw4 -q device $ifname)"
json_close_object
json_close_array
procd_close_data
procd_close_instance
}
launcher() {
[ "$2" = 0 ] || { >&2 echo "$(basename $0): section $1 validation failed"; return 1; }
[ "$enabled" = 0 ] && return 0
local error=0
local wanifname
# ifname
case "$nat66$nat44" in
00) network_get_device wanifname "$DEF_WAN";;
01) network_get_device wanifname "$DEF_WAN";;
10) network_get_device wanifname "$DEF_WAN6";;
11) network_get_device wanifname "$DEF_WAN6";;
esac
local ifname="${ifname:-$wanifname}"
[ -z "$ifname" ] && >&2 echo "$(basename $0): section $1 option ifname parsing failed, there may be no network connection" && let error++
# review
[ -n "$EINAT_DEBUG" ] && {
local v ucivv="enabled bpf_log_level bpf_loader nat44 nat66 ifname ports internal_ifaces internal_subnets hairpin_enabled hairpinif"
for v in $ucivv; do eval "echo $1 $v=\'\$$v\'"; done # ash not support ${!v}
}
[ "$error" -gt 0 ] && return 1
einat_instance "$1"
}
service_triggers() {
procd_add_reload_trigger "$CONF" 'network'
local interfaces
load_interfaces $CONFIGSECTION
[ -n "$interfaces" ] && {
procd_add_reload_interface_trigger $interfaces
} || {
for n in $DEF_WAN $DEF_WAN6; do
procd_add_reload_interface_trigger $n
done
}
procd_add_validation validate_section_config
}
start_service() {
validate_section_config "$CONFIGSECTION" launcher
}
reload_service() {
stop
start
}
service_started() { procd_set_config_changed firewall; }
service_stopped() { procd_set_config_changed firewall; }

3
einat-ebpf/test.sh Executable file
View file

@ -0,0 +1,3 @@
#!/bin/sh
einat 2>&1 | grep "$2"