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core: 如果自动获取的 IP 不是重装前的，则使用之前的
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bin456789
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@ -9,6 +9,10 @@ ipv6_addr=$4
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ipv6_gateway=$5
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is_in_china=$6
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DHCP_TIMEOUT=15
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DNS_FILE_TIMEOUT=5
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TEST_TIMEOUT=10
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# 检测是否有网络是通过检测这些 IP 的端口是否开放
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# 因为 debian initrd 没有 nslookup
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# 改成 generate_204？但检测网络时可能 resolv.conf 为空
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@ -63,6 +67,16 @@ get_first_ipv4_addr() {
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fi
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}
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get_first_ipv4_gateway() {
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# debian 11 initrd 没有 xargs awk
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# debian 12 initrd 没有 xargs
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if false; then
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ip -4 route show default dev "$ethx" | head -1 | awk '{print $3}'
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else
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ip -4 route show default dev "$ethx" | head -1 | cut -d' ' -f3
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fi
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}
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remove_netmask() {
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cut -d/ -f1
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}
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@ -77,6 +91,16 @@ get_first_ipv6_addr() {
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fi
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}
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get_first_ipv6_gateway() {
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# debian 11 initrd 没有 xargs awk
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# debian 12 initrd 没有 xargs
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if false; then
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ip -6 route show default dev "$ethx" | head -1 | awk '{print $3}'
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else
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ip -6 route show default dev "$ethx" | head -1 | cut -d' ' -f3
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fi
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}
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is_have_ipv4_addr() {
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ip -4 addr show scope global dev "$ethx" | grep -q inet
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}
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@ -101,6 +125,14 @@ is_have_ipv6() {
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is_have_ipv6_addr && is_have_ipv6_gateway
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}
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is_have_ipv4_dns() {
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[ -f /etc/resolv.conf ] && grep -q '^nameserver .*\.' /etc/resolv.conf
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}
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is_have_ipv6_dns() {
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[ -f /etc/resolv.conf ] && grep -q '^nameserver .*:' /etc/resolv.conf
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}
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add_missing_ipv4_config() {
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if [ -n "$ipv4_addr" ] && [ -n "$ipv4_gateway" ]; then
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if ! is_have_ipv4_addr; then
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@ -157,8 +189,6 @@ is_need_test_ipv6() {
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# debian9 × √ 没有此软件
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# alpine √ × ×
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TIMEOUT=10
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test_by_wget() {
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src=$1
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dst=$2
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@ -171,7 +201,7 @@ test_by_wget() {
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fi
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# tcp 443 通了就算成功，不管 http 是不是 404
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wget -T "$TIMEOUT" \
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wget -T "$TEST_TIMEOUT" \
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--bind-address="$src" \
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--no-check-certificate \
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--max-redirect 0 \
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@ -186,7 +216,7 @@ test_by_nc() {
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# tcp 443 通了就算成功
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nc -z -v \
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-w "$TIMEOUT" \
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-w "$TEST_TIMEOUT" \
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-s "$src" \
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"$dst" 443
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}
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@ -204,9 +234,8 @@ test_connect() {
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}
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test_internet() {
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echo 'Testing Internet Connection...'
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for i in $(seq 10); do
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for i in $(seq 5); do
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echo "Testing Internet Connection. Test $i... "
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if is_need_test_ipv4 && test_connect "$(get_first_ipv4_addr | remove_netmask)" "$ipv4_dns1" >/dev/null 2>&1; then
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echo "IPv4 has internet."
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ipv4_has_internet=true
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@ -243,20 +272,22 @@ if [ -z "$ethx" ]; then
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exit
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fi
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echo "Configuring $ethx ($mac_addr)"
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echo "Configuring $ethx ($mac_addr)..."
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# dhcp v4 /v6
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# 开启 ethx
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ip link set dev "$ethx" up
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sleep 1
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# 开启 dhcpv4/v6
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# debian / kali
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if [ -f /usr/share/debconf/confmodule ]; then
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# shellcheck source=/dev/null
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. /usr/share/debconf/confmodule
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# 开启 ethx + dhcpv4/v6
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ip link set dev "$ethx" up
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sleep 1
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db_progress STEP 1
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# dhcpv4
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# 无需等待写入 dns，在 dhcpv6 等待
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db_progress INFO netcfg/dhcp_progress
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udhcpc -i "$ethx" -f -q -n || true
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db_progress STEP 1
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@ -276,7 +307,7 @@ id-assoc na 0 {
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};
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EOF
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dhcp6c -c /var/lib/netcfg/dhcp6c.conf "$ethx" || true
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sleep 10
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sleep $DHCP_TIMEOUT # 等待获取 ip 和写入 dns
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# kill-all-dhcp
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kill -9 "$(cat /var/run/dhcp6c.pid)" || true
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db_progress STEP 1
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@ -306,50 +337,55 @@ done
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# 由于还没设置静态ip，所以有条目表示有动态地址
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is_have_ipv4_addr && dhcpv4=true || dhcpv4=false
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is_have_ipv6_addr && dhcpv6_or_slaac=true || dhcpv6_or_slaac=false
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should_disable_ra_slaac=false
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# 设置静态地址，或者设置udhcpc无法设置的网关
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# 如果自动获取的 IPv4 地址不是重装前的，则使用之前的
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if $dhcpv4 && [ -n "$ipv4_addr" ] && [ -n "$ipv4_gateway" ] &&
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! [ "$ipv4_addr" = "$(get_first_ipv4_addr)" ]; then
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echo "IPv4 address auto obtained is different from old system."
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dhcpv4=false
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flush_ipv4_config
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fi
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# 如果自动获取的 IPv6 地址不是重装前的，则使用之前的
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if $dhcpv6_or_slaac && [ -n "$ipv6_addr" ] && [ -n "$ipv6_gateway" ] &&
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! [ "$ipv6_addr" = "$(get_first_ipv6_addr)" ]; then
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echo "IPv6 address auto obtained is different from old system."
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dhcpv6_or_slaac=false
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should_disable_ra_slaac=true
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flush_ipv6_config
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fi
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# 设置静态地址，或者设置 debian 9 udhcpc 无法设置的网关
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add_missing_ipv4_config
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add_missing_ipv6_config
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# 检查 ipv4/ipv6 是否连接联网
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ipv4_has_internet=false
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ipv6_has_internet=false
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test_internet
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# 防止自动获取的 IP 无法上网
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# 防止自动获取的 IP 不是重装前的 IP 而造成失联
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if $dhcpv4 && [ -n "$ipv4_addr" ] && [ -n "$ipv4_gateway" ] &&
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{ ! $ipv4_has_internet || ! [ "$ipv4_addr" = "$(get_first_ipv4_addr)" ]; }; then
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echo "IPv4 from DHCPv4 can't access Internet or not matched."
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# 如果 IPv4 无法上网，并且自动获取的网关不是重装前的网关，则改成静态
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if ! $ipv4_has_internet &&
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$dhcpv4 && [ -n "$ipv4_addr" ] && [ -n "$ipv4_gateway" ] &&
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! [ "$ipv4_gateway" = "$(get_first_ipv4_gateway)" ]; then
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echo "IPv4 gateway auto obtained is different from old system."
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dhcpv4=false
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flush_ipv4_config
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add_missing_ipv4_config
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test_internet
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if $ipv4_has_internet; then
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dhcpv4=false
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fi
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fi
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should_disable_ra_slaac=false
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# 防止自动获取的 IP 无法上网
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# 防止自动获取的 IP 不是重装前的 IP 而造成失联
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if $dhcpv6_or_slaac && [ -n "$ipv6_addr" ] && [ -n "$ipv6_gateway" ] &&
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{ ! $ipv6_has_internet || ! [ "$ipv6_addr" = "$(get_first_ipv6_addr)" ]; }; then
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echo "IPv6 from SLAAC/DHCPv6 can't access Internet or not matched."
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# 如果 IPv6 无法上网，并且自动获取的网关不是重装前的网关，则改成静态
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if ! $ipv6_has_internet &&
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$dhcpv6_or_slaac && [ -n "$ipv6_addr" ] && [ -n "$ipv6_gateway" ] &&
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! [ "$ipv6_gateway" = "$(get_first_ipv6_gateway)" ]; then
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echo "IPv6 gateway auto obtained is different from old system."
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dhcpv6_or_slaac=false
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should_disable_ra_slaac=true
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flush_ipv6_config true
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add_missing_ipv6_config
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test_internet
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if $ipv6_has_internet; then
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dhcpv6_or_slaac=false
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should_disable_ra_slaac=true
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fi
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fi
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# 等待 udhcpc 创建 /etc/resolv.conf
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# 好像只有 dhcpv4 会创建 resolv.conf
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if { $dhcpv4 || $dhcpv6_or_slaac; } && [ ! -e /etc/resolv.conf ]; then
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echo "Waiting for /etc/resolv.conf..."
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sleep 5
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fi
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# 要删除不联网协议的ip，因为
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@ -365,11 +401,11 @@ elif ! $ipv4_has_internet && $ipv6_has_internet; then
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fi
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# 如果联网了，但没获取到默认 DNS，则添加我们的 DNS
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if $ipv4_has_internet && ! { [ -e /etc/resolv.conf ] && grep -F '.' /etc/resolv.conf; }; then
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if $ipv4_has_internet && ! { [ -e /etc/resolv.conf ] && is_have_ipv4_dns; }; then
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echo "nameserver $ipv4_dns1" >>/etc/resolv.conf
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echo "nameserver $ipv4_dns2" >>/etc/resolv.conf
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fi
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if $ipv6_has_internet && ! { [ -e /etc/resolv.conf ] && grep -F ':' /etc/resolv.conf; }; then
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if $ipv6_has_internet && ! { [ -e /etc/resolv.conf ] && is_have_ipv6_dns; }; then
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echo "nameserver $ipv6_dns1" >>/etc/resolv.conf
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echo "nameserver $ipv6_dns2" >>/etc/resolv.conf
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fi
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