From e51774d4d88e2d0bad45d2a4250aad2ac5628098 Mon Sep 17 00:00:00 2001
From: bin456789 <bin456789@gmail.com>
Date: Mon, 21 Aug 2023 23:50:20 +0800
Subject: [PATCH] =?UTF-8?q?core:=20=E5=AE=8C=E6=88=90=20alpine=20=E7=8E=AF?=
 =?UTF-8?q?=E5=A2=83=E7=9A=84=E9=9D=99=E6=80=81ip/ipv6=E9=85=8D=E7=BD=AE?=
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

---
 alpine-network.sh | 93 +++++++++++++++++++++++++++++++++++++++++++++++
 reinstall.sh      | 49 ++++++++++++++++++++++++-
 trans.sh          | 73 ++++++++++++++++++++++++++++++-------
 3 files changed, 200 insertions(+), 15 deletions(-)
 create mode 100644 alpine-network.sh

diff --git a/alpine-network.sh b/alpine-network.sh
new file mode 100644
index 0000000..484bab7
--- /dev/null
+++ b/alpine-network.sh
@@ -0,0 +1,93 @@
+#!/bin/ash
+# shellcheck shell=dash
+
+mac_addr=$1
+ipv4_addr=$2
+ipv4_gateway=$3
+ipv6_addr=$4
+ipv6_gateway=$5
+is_in_china=$6
+
+if $is_in_china; then
+    ipv4_dns1='119.29.29.29'
+    ipv4_dns2='223.5.5.5'
+    ipv6_dns1='2402:4e00::'
+    ipv6_dns2='2400:3200::1'
+else
+    ipv4_dns1='1.1.1.1'
+    ipv4_dns2='8.8.8.8'
+    ipv6_dns1='2606:4700:4700::1111'
+    ipv6_dns2='2001:4860:4860::8888'
+fi
+
+# 检测是否有 dhcpv4
+has_ipv4=false
+dhcpv4=false
+ip -4 addr show scope global | grep inet && dhcpv4=true && has_ipv4=true
+
+# 检测是否有 slaac
+has_ipv6=false
+slaac=false
+for i in $(seq 10 -1 0); do
+    echo waiting slaac for ${i}s
+    ip -6 addr show scope global | grep inet6 && slaac=true && has_ipv6=true && break
+    sleep 1
+done
+
+# 设置静态地址
+# udhcpc不支持dhcpv6，所以如果网络是 dhcpv6，也先设置成静态
+ip link set dev eth0 up
+if ! $has_ipv4 && [ -n "$ipv4_addr" ]; then
+    ip -4 addr add $ipv4_addr dev eth0
+    ip -4 route add default via $ipv4_gateway
+    has_ipv4=true
+fi
+if ! $has_ipv6 && [ -n "$ipv6_addr" ]; then
+    ip -6 addr add $ipv6_addr dev eth0
+    ip -6 route add default via $ipv6_gateway
+    has_ipv6=true
+fi
+
+# 检查 ipv4/ipv6 是否连接联网
+ipv4_has_internet=false
+ipv6_has_internet=false
+for i in $(seq 10); do
+    $has_ipv4 && ipv4_test_complete=false || ipv4_test_complete=true
+    $has_ipv6 && ipv6_test_complete=false || ipv6_test_complete=true
+
+    if ! $ipv4_test_complete && nslookup www.qq.com $ipv4_dns1; then
+        ipv4_has_internet=true
+        ipv4_test_complete=true
+    fi
+    if ! $ipv6_test_complete && nslookup www.qq.com $ipv6_dns1; then
+        ipv6_has_internet=true
+        ipv6_test_complete=true
+    fi
+
+    if $ipv4_test_complete && $ipv6_test_complete; then
+        break
+    fi
+    sleep 1
+done
+
+# 等待 udhcpc 创建 /etc/resolv.conf
+if { $dhcpv4 || $slaac; } && [ ! -e /etc/resolv.conf ]; then
+    sleep 3
+fi
+
+# 如果ipv4/ipv6不联网，则删除该协议的dns
+if $ipv4_has_internet && ! $ipv6_has_internet; then
+    sed -i '/:/d' /etc/resolv.conf
+elif ! $ipv4_has_internet && $ipv6_has_internet; then
+    sed -i '/\./d' /etc/resolv.conf
+fi
+
+# 如果联网了，但没获取到默认 DNS，则添加我们的 DNS
+if $ipv4_has_internet && ! grep '\.' /etc/resolv.conf; then
+    echo "nameserver $ipv4_dns1" >>/etc/resolv.conf
+    echo "nameserver $ipv4_dns2" >>/etc/resolv.conf
+fi
+if $ipv6_has_internet && ! grep ':' /etc/resolv.conf; then
+    echo "nameserver $ipv6_dns1" >>/etc/resolv.conf
+    echo "nameserver $ipv6_dns2" >>/etc/resolv.conf
+fi
diff --git a/reinstall.sh b/reinstall.sh
index 7753d34..b773cbd 100644
--- a/reinstall.sh
+++ b/reinstall.sh
@@ -596,6 +596,28 @@ is_efi() {
     fi
 }
 
+collect_netconf() {
+    if is_in_windows; then
+        # TODO:
+        echo
+    else
+        # TODO: 多网卡 单网卡多IP
+        nic_name=$(ip -o addr show scope global | head -1 | awk '{print $2}')
+        mac_addr=$(ip addr show scope global | grep link/ether | head -1 | awk '{print $2}')
+        ipv4_addr=$(ip -4 addr show scope global | grep inet | head -1 | awk '{print $2}')
+        ipv6_addr=$(ip -6 addr show scope global | grep inet6 | head -1 | awk '{print $2}')
+
+        ipv4_gateway=$(ip -4 route show default dev $nic_name | awk '{print $3}')
+        ipv6_gateway=$(ip -6 route show default dev $nic_name | awk '{print $3}')
+
+        echo 1 $mac_addr
+        echo 2 $ipv4_addr
+        echo 3 $ipv4_gateway
+        echo 4 $ipv6_addr
+        echo 5 $ipv6_gateway
+    fi
+}
+
 install_grub_win() {
     grub_cfg=$1 # /cygdrive/$c/grub.cfg
 
@@ -897,6 +919,7 @@ mod_alpine_initrd() {
 
     # 预先下载脚本
     curl -Lo $tmp_dir/trans.start $confhome/trans.sh
+    curl -Lo $tmp_dir/alpine-network.sh $confhome/alpine-network.sh
 
     # virt 内核添加 ipv6 模块
     if virt_dir=$(ls -d $tmp_dir/lib/modules/*-virt 2>/dev/null); then
@@ -916,23 +939,45 @@ mod_alpine_initrd() {
         fi
     fi
 
-    # hack 运行 trans.start
+    # hack 1 添加 ipv6 模块
+    line_num=$(grep -E -n 'configure_ip\(\)' init | cut -d: -f1)
+    cat <<EOF | sed -i "${line_num}r /dev/stdin" init
+        depmod
+        modprobe ipv6
+EOF
+
+    # hack 2 udhcpc添加 -n 参数，中断静态ipv4时dhcp无限请求
+    # shellcheck disable=SC2016
+    sed -i '/$MOCK udhcpc/s/.*/& -n || true/' init
+
+    # hack 3 网络配置
+    collect_netconf
+    line_num=$(grep -E -n 'MAC_ADDRESS=' init | cut -d: -f1)
+    cat <<EOF | sed -i "${line_num}r /dev/stdin" init
+        source /alpine-network.sh \
+        "$mac_addr" "$ipv4_addr" "$ipv4_gateway" "$ipv6_addr" "$ipv6_gateway" \
+        "$(is_in_china && echo true || echo false)"
+EOF
+
+    # hack 4 运行 trans.start
     # exec /bin/busybox switch_root $switch_root_opts $sysroot $chart_init "$KOPT_init" $KOPT_init_args # 3.17
     # exec              switch_root $switch_root_opts $sysroot $chart_init "$KOPT_init" $KOPT_init_args # 3.18
     line_num=$(grep -E -n '^exec (/bin/busybox )?switch_root' init | cut -d: -f1)
     line_num=$((line_num - 1))
     # 1. alpine arm initramfs 时间问题 要添加 --no-check-certificate
-    # 2. 神奇的 aws t4g arm 会出现bad header错误， 但甲骨文arm就正常，所以只能预先下载
+    # 2. aws t4g arm 如果没设置console=ttyx，在initramfs里面wget https会出现bad header错误，chroot后正常
     # Connecting to raw.githubusercontent.com (185.199.108.133:443)
     # 60C0BB2FFAFF0000:error:0A00009C:SSL routines:ssl3_get_record:http request:ssl/record/ssl3_record.c:345:
     # ssl_client: SSL_connect
     # wget: bad header line: �
     cat <<EOF | sed -i "${line_num}r /dev/stdin" init
+        # echo "wget --no-check-certificate -O- $confhome/trans.sh | /bin/ash" >\$sysroot/etc/local.d/trans.start
         # wget --no-check-certificate -O \$sysroot/etc/local.d/trans.start $confhome/trans.sh
         cp /trans.start \$sysroot/etc/local.d/trans.start
         chmod a+x \$sysroot/etc/local.d/trans.start
         ln -s /etc/init.d/local \$sysroot/etc/runlevels/default/
 EOF
+
     # 重建
     # 注意要用 cpio -H newc 不要用 cpio -c ，不同版本的 -c 作用不一样，很坑
     # -c    Use the old portable (ASCII) archive format
diff --git a/trans.sh b/trans.sh
index eb1583f..c79d399 100644
--- a/trans.sh
+++ b/trans.sh
@@ -219,10 +219,69 @@ install_alpine() {
     rm -f /etc/local.d/trans.start
     rm -f /etc/runlevels/default/local
 
+    # 添加 virt-what 用到的社区仓库
+    add_community_repo
+
+    # 保存默认应用列表
+    if [ ! -e /tmp/world.orig ]; then
+        cp /etc/apk/world /tmp/world.orig
+    fi
+
+    # 如果是 vm 就用 virt 内核
+    apk add virt-what
+    if [ -n "$(virt-what)" ]; then
+        kernel_opt="-k virt"
+    fi
+
     # 网络
-    setup-interfaces -a # 生成 /etc/network/interfaces
+    # 坑1 udhcpc下，ip -4 addr 无法知道是否是 dhcp
+    # 坑2 udhcpc不支持dhcpv6
+    # 坑3 安装 dhcpcd，会强制使用dhcpv6，即使ra m=0，解决方法是配置文件设置auto
     rc-update add networking boot
 
+    # 生成 ipv4 配置
+    if udhcpc -i eth0 -f -q -n; then
+        # 生成dhcpv4配置
+        setup-interfaces -a
+    else
+        # 如果当前有ipv4地址，则会生成静态配置
+        # 如果当前没有ipv4地址，则会生成dhcpv4配置
+        echo | setup-interfaces
+    fi
+
+    # 生成 ipv6 配置
+    apk add ndisc6
+    ra=$(rdisc6 eth0)
+    echo "$ra" | cat -n
+    echo "$ra" | grep 'Autonomous address conf' | grep Yes && is_slaac=true || is_slaac=false
+    echo "$ra" | grep 'Stateful address conf' | grep Yes && is_dhcpv6=true || is_dhcpv6=false
+
+    # 删除临时安装的软件，不然会带到新系统
+    # shellcheck disable=SC2046
+    apk del $(diff /tmp/world.orig /etc/apk/world | grep '^+' | sed '1d' | sed 's/^+//' | xargs)
+
+    if $is_slaac; then
+        echo 'iface eth0 inet6 auto' >>/etc/network/interfaces
+    fi
+
+    if $is_dhcpv6; then
+        apk add dhcpcd
+        echo 'iface eth0 inet6 dhcp' >>/etc/network/interfaces
+    fi
+
+    if ! $is_slaac && ! $is_dhcpv6; then
+        ipv6_addr=$(ip -6 addr show scope global dev eth0 | grep inet6 | head -1 | awk '{print $2}')
+        ipv6_gateway=$(ip -6 route show default dev eth0 | awk '{print $3}')
+        if [ -n "$ipv6_addr" ]; then
+            cat <<EOF >>/etc/network/interfaces
+iface eth0 inet6 static
+    address $ipv6_addr
+    gateway $ipv6_gateway
+EOF
+        fi
+    fi
+    cat -n /etc/network/interfaces
+
     # 设置
     setup-keymap us us
     setup-timezone -i Asia/Shanghai
@@ -242,18 +301,6 @@ install_alpine() {
     # crond | default
     # seedrng | boot
 
-    # 添加 virt-what 用到的社区仓库
-    add_community_repo
-
-    # 如果是 vm 就用 virt 内核
-    cp /etc/apk/world /tmp/world.old
-    apk add virt-what
-    if [ -n "$(virt-what)" ]; then
-        kernel_opt="-k virt"
-    fi
-    # 删除 virt-what 和依赖，不然会带到新系统
-    apk del "$(diff /tmp/world.old /etc/apk/world | grep '^+' | sed '1d' | sed 's/^+//')"
-
     # 重置为官方仓库配置
     true >/etc/apk/repositories
     setup-apkrepos -1