chore/docs: lease building requirement and write build instruction

Makefile

@@ -8,9 +8,9 @@
 # Pin the default clang to a stable version.
 CLANG ?= clang
 STRIP ?= llvm-strip
-OUTPUT ?= dae
 CFLAGS := -O2 -Wall -Werror $(CFLAGS)
 TARGET ?= bpfel,bpfeb
+OUTPUT ?= dae
 
 # Get version from .git.
 date=$(shell git log -1 --format="%cd" --date=short | sed s/-//g)

README.md

@@ -10,15 +10,42 @@ As a successor of [v2rayA](https://github.com/v2rayA/v2rayA), dae abandoned v2ra
 
 ## Usage
 
-Build:
+### Build
+
+**Make Dependencies**
+```
+clang >= 10
+llvm >= 10
+golang >= 1.18
+```
+
+**Build**
 ```shell
 git clone https://github.com/v2rayA/dae.git
 cd dae
 git submodule update --init
-make
+# Minimal dependency build:
+make GOFLAGS="-buildvcs=false" CGO_ENABLED=0
+# Or normally build:
+# make
 ```
 
-Run:
+### Run
+
+**Runtime Dependencies**
+
+Download [geoip.dat](https://github.com/v2ray/geoip/releases/latest) and [geosite.dat](https://github.com/v2fly/domain-list-community/releases/latest) to `/usr/local/share/dae/`.
+
+```
+mkdir -p /usr/local/share/dae/
+pushd /usr/local/share/dae/
+curl -L -o geoip.dat https://github.com/v2ray/geoip/releases/latest/download/geoip.dat
+curl -L -o geosite.dat https://github.com/v2ray/domain-list-community/releases/latest/download/dlc.dat
+popd
+```
+
+**Run**
+
 ```shell
 ./dae run -c example.dae
 ```
@@ -51,8 +78,8 @@ Note that if you bind dae to WAN only, dae only provide network service for loca
 
 1. Check dns upstream and source loop (whether upstream is also a client of us) and remind the user to add sip rule.
 1. Domain routing performance optimization.
-1. Handle the case that nodes do not support UDP by adding `filter: l4proto_out(tcp, udp)`, and filter out those nodes support both TCP and UDP. Thus we can use routing to handle it.
+1. Handle the case that nodes do not support UDP.
-1. Handle the case that nodes do not support IPv6 by adding `filter: ipversion_out(4, 6)`, and filter out those nodes support both IPv4 and IPv6. Thus we can use routing to handle it.
+1. Handle the case that nodes do not support IPv6.
 1. L4Checksum problem. Maybe it is hard to solve.
 1. MACv2 extension extraction.
 1. Log to userspace.

cmd/validate.go

@@ -26,7 +26,6 @@ var (
 				fmt.Println(err)
 				os.Exit(1)
 			}
-			fmt.Println("OK")
 		},
 	}
 )

common/utils.go

@@ -43,8 +43,9 @@ func Ipv6ByteSliceToUint32Array(_ip []byte) (ip [4]uint32) {
 }
 
 func Ipv6Uint32ArrayToByteSlice(_ip [4]uint32) (ip []byte) {
+	ip = make([]byte, 16)
 	for j := 0; j < 4; j++ {
-		ip = binary.LittleEndian.AppendUint32(ip, _ip[j])
+		binary.LittleEndian.PutUint32(ip[j*4:], _ip[j])
 	}
 	return ip
 }

component/control/kern/headers

@@ -1 +1 @@
-Subproject commit 69c6c597560e3c0c445b8b0824e9a6e4e7af7dc1
+Subproject commit 99eb2ebd74b10f2b91c7840c83ad08eec8f50e59

component/control/kern/tproxy.c

@@ -3,17 +3,18 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  * Copyright (c) since 2022, v2rayA Organization <team@v2raya.org>
  */
-#include "headers/if_ether_defs.h"
-#include "headers/pkt_cls_defs.h"
-#include "headers/socket_defs.h"
-#include "headers/bpf_probe_read.h"
-#include "headers/vmlinux.h"
 
 #include <asm-generic/errno-base.h>
 
+#include "headers/if_ether_defs.h"
+#include "headers/pkt_cls_defs.h"
+#include "headers/socket_defs.h"
+#include "headers/vmlinux.h"
+
 // #include <bpf/bpf_core_read.h>
-#include <bpf/bpf_endian.h>
+#include "headers/bpf_probe_read.h"
-#include <bpf/bpf_helpers.h>
+#include "headers/bpf_endian.h"
+#include "headers/bpf_helpers.h"
 
 // #define __DEBUG_ROUTING
 // #define __PRINT_ROUTING_RESULT

go.mod

@@ -1,6 +1,6 @@
 module github.com/v2rayA/dae
 
-go 1.19
+go 1.18
 
 require (
 	github.com/adrg/xdg v0.4.0