feat: 动态同步 IPv6 前缀到 nftables

scripts/init.sh

@@ -77,7 +77,7 @@ rm -rf "$CRASHDIR"/starts/shellcrash.openrc
 command -v bash >/dev/null 2>&1 && shtype=bash
 [ -x /bin/ash ] && shtype=ash
 #批量授权
-for file in start.sh starts/bfstart.sh starts/afstart.sh starts/fw_stop.sh menu.sh menus/task_cmd.sh menus/bot_tg.sh; do
+for file in start.sh starts/bfstart.sh starts/afstart.sh starts/fw_stop.sh starts/fw_ipv6_watch.sh menu.sh menus/task_cmd.sh menus/bot_tg.sh; do
     sed -i "s|/bin/sh|/bin/$shtype|" "$CRASHDIR/$file" 2>/dev/null
     chmod +x "$CRASHDIR/$file" 2>/dev/null
 done

scripts/starts/fw_getlanip.sh

@@ -1,34 +1,171 @@
+ipv6_route_prefixes() {
+    awk '
+    function is_global_prefix(value) {
+        return value ~ /^[23][0-9A-Fa-f]*:/ && value ~ /\/[0-9]+$/
+    }
+    $1 == "default" {
+        for (i = 1; i < NF; i++) {
+            if ($i == "from" && is_global_prefix($(i + 1)))
+                print $(i + 1)
+        }
+        next
+    }
+    is_global_prefix($1) {
+        via = 0
+        for (i = 1; i <= NF; i++) {
+            if ($i == "via")
+                via = 1
+        }
+        if (!via)
+            print $1
+    }'
+}
+
+get_lan_ifaces() {
+    ip route show scope link 2>/dev/null |
+        grep -Ev 'default|ppp|wan|utun|iot|peer|docker|podman|virbr|vnet|ovs|vmbr|veth|vmnic|vboxnet|lxcbr|xenbr|vEthernet|wgs|multicast|anycast' |
+        awk '{for(i=1;i<=NF;i++) if($i=="dev") {print $(i+1); break}}' |
+        grep -v '^lo$' |
+        sort -u
+}
+
+get_openwrt_lan_ifaces() {
+    if command -v ubus >/dev/null 2>&1; then
+        ubus -S call network.interface.lan status 2>/dev/null |
+            awk -F '"' '$2 == "l3_device" {print $4}'
+    fi
+    printf '%s\n' $lan_ifaces
+}
+
+get_ipv6_prefixes_openwrt() {
+    ipv6_prefixes=$(
+        for ipv6_iface in $(get_openwrt_lan_ifaces | sort -u); do
+            ip -6 route show dev "$ipv6_iface" 2>/dev/null |
+                grep -v '^default' |
+                ipv6_route_prefixes
+        done
+    )
+    # Some OpenWrt variants do not expose the LAN route through BusyBox ip.
+    # In that case, use netifd's source-specific default route as a fallback.
+    [ -n "$ipv6_prefixes" ] || ipv6_prefixes=$(
+        ip -6 route show default 2>/dev/null | ipv6_route_prefixes
+    )
+    printf '%s\n' "$ipv6_prefixes" | sort -u
+}
+
+get_ipv6_prefixes_linux() {
+    ipv6_prefixes=$(
+        for ipv6_iface in $lan_ifaces; do
+            ip -6 route show dev "$ipv6_iface" 2>/dev/null | grep -v '^default'
+        done | ipv6_route_prefixes | sort -u
+    )
+    # A host may use one interface for both its uplink and LAN, or may not
+    # have an IPv4 LAN route. Fall back to directly connected global routes.
+    [ -n "$ipv6_prefixes" ] || ipv6_prefixes=$(
+        ip -6 route show 2>/dev/null |
+            grep -Ev 'unreachable|prohibit|blackhole|ppp|wan|utun|iot|peer|docker|podman|virbr|vnet|ovs|vmbr|veth|vmnic|vboxnet|lxcbr|xenbr|vEthernet|wgs|multicast|anycast' |
+            ipv6_route_prefixes |
+            sort -u
+    )
+    printf '%s\n' "$ipv6_prefixes"
+}
+
+get_ipv6_prefixes_router() {
+    # Padavan/Asuswrt and other BusyBox based firmware do not consistently
+    # expose route protocol metadata. Only depend on route shape and devices.
+    ipv6_prefixes=$(
+        for ipv6_iface in $lan_ifaces; do
+            ip -6 route show dev "$ipv6_iface" 2>/dev/null |
+                grep -v '^default' |
+                ipv6_route_prefixes
+        done
+    )
+    [ -n "$ipv6_prefixes" ] || ipv6_prefixes=$(
+        ip -6 route show default 2>/dev/null | ipv6_route_prefixes
+    )
+    printf '%s\n' "$ipv6_prefixes" | sort -u
+}
+
+get_ipv6_prefixes_fallback() {
+    # Generic fallback for systems unknown to ShellCrash. Avoid fixed field
+    # positions and route protocol names, which differ across ip variants.
+    ip -6 route show 2>/dev/null | ipv6_route_prefixes | sort -u
+}
+
+get_ipv6_platform() {
+    case "$systype" in
+    mi_snapshot | ng_snapshot)
+        echo openwrt
+        return
+        ;;
+    Padavan | asusrouter)
+        echo router
+        return
+        ;;
+    container)
+        echo linux
+        return
+        ;;
+    esac
+
+    if [ -f /etc/openwrt_release ] || { [ -f /etc/rc.common ] && command -v uci >/dev/null 2>&1; }; then
+        echo openwrt
+    elif [ "$(uname -s 2>/dev/null)" = Linux ]; then
+        echo linux
+    else
+        echo fallback
+    fi
+}
+
+get_ipv6_prefixes() {
+    [ -n "$lan_ifaces" ] || lan_ifaces=$(get_lan_ifaces)
+    case "$(get_ipv6_platform)" in
+    openwrt) get_ipv6_prefixes_openwrt ;;
+    router) get_ipv6_prefixes_router ;;
+    linux) get_ipv6_prefixes_linux ;;
+    *) get_ipv6_prefixes_fallback ;;
+    esac
+}
+
+build_host_ipv6() {
+    host_ipv6="fe80::/10 fd00::/8 $1"
+    [ "$ts_service" = ON ] && host_ipv6="$host_ipv6 fd7a:115c:a1e0::/48"
+    if [ "$wg_service" = ON ]; then
+        [ -f "$CRASHDIR"/configs/gateway.cfg ] && . "$CRASHDIR"/configs/gateway.cfg
+        [ -n "$wg_ipv6" ] && host_ipv6="$host_ipv6 $wg_ipv6"
+    fi
+    # Only pass prefix-shaped values to firewall generators and keep the
+    # result stable so the watcher can compare it cheaply.
+    host_ipv6=$(printf '%s\n' "$host_ipv6" |
+        tr ' ' '\n' |
+        awk '/^[0-9A-Fa-f:]+\/[0-9]+$/ {print}' |
+        sort -u |
+        tr '\n' ' ' |
+        sed 's/ $//')
+}
+
 getlanip() { #获取局域网host地址
     i=1
     while [ "$i" -le "20" ]; do
         #ipv4局域网网段
         host_ipv4=$(ip route show scope link | grep -Ev 'default|wan|utun|iot|peer|docker|podman|virbr|vnet|ovs|vmbr|veth|vmnic|vboxnet|lxcbr|xenbr|vEthernet|wgs|multicast|anycast' | awk '{print $1}')
-        #ipv6局域网网段 - 从IPv4已识别的LAN接口获取全局IPv6前缀
+        #ipv6局域网网段
-        [ "$ipv6_redir" = "ON" ] && {
+        if [ "$ipv6_redir" = "ON" ]; then
-            lan_ifaces=$(ip route show scope link | grep -Ev 'ppp|wan|utun|iot|peer|docker|podman|virbr|vnet|ovs|vmbr|veth|vmnic|vboxnet|lxcbr|xenbr|vEthernet|wgs|multicast|anycast' | awk '{for(i=1;i<=NF;i++) if($i=="dev") {print $(i+1); break}}' | grep -v '^lo$' | sort -u)
+            lan_ifaces=$(get_lan_ifaces)
-            host_ipv6=$(
+            detected_host_ipv6=$(get_ipv6_prefixes)
-                for iface in $lan_ifaces; do
+        fi
-                    ip -6 addr show dev $iface 2>/dev/null
-                done | grep 'scope global' | awk '{print $2}' | tr '\n' ' ' | sed 's/ $//'
-            )
-			[ -z "$host_ipv6" ] && host_ipv6=$(ip -6 route show | grep -Ev 'default|unreachable|fe80::/|wan|ppp|utun|iot|peer|docker|podman|virbr|vnet|ovs|vmbr|veth|vmnic|vboxnet|lxcbr|xenbr|vEthernet|wgs|multicast|anycast' | awk '{print $1}' | tr '\n' ' ' | sed 's/ $//')
-        }
         [ -f "$TMPDIR"/ShellCrash.log ] && break
-        [ -n "$host_ipv4" -a "$ipv6_redir" != "ON" ] && break
+        [ -n "$host_ipv4" ] && [ "$ipv6_redir" != "ON" ] && break
-        [ -n "$host_ipv4" -a -n "$host_ipv6" ] && break
+        [ -n "$host_ipv4" ] && [ -n "$detected_host_ipv6" ] && break
         sleep 1 && i=$((i + 1))
     done
     #Tailscale
-    [ "$ts_service" = ON ] && {
+    [ "$ts_service" = ON ] && ts_host_ipv4=' 100.64.0.0/10'
-        ts_host_ipv4=' 100.64.0.0/10'
-        ts_host_ipv6=' fd7a:115c:a1e0::/48'
-    }
     #Wireguard
-    [ "$wg_service" = ON ] && {
+    if [ "$wg_service" = ON ]; then
         . "$CRASHDIR"/configs/gateway.cfg
-        wg_host_ipv4=' $wg_ipv4'
+        wg_host_ipv4=" $wg_ipv4"
-        [ -n "$wg_ipv6" ] && wg_host_ipv6=' $wg_ipv6'
+    fi
-    }
     #添加自定义ipv4局域网网段
     if [ "$replace_default_host_ipv4" = "ON" ]; then
         host_ipv4="$cust_host_ipv4"
@@ -40,7 +177,7 @@ getlanip() { #获取局域网host地址
         host_ipv4='192.168.0.0/16 10.0.0.0/12 172.16.0.0/12'
         logger "无法获取本地LAN-IPV4网段，请前往流量过滤设置界面设置自定义网段！" 31
     }
-    host_ipv6="fe80::/10 fd00::/8 $host_ipv6$ts_host_ipv6$wg_host_ipv6"
+    build_host_ipv6 "$detected_host_ipv6"
     #获取本机出口IP地址
     local_ipv4=$(ip route 2>&1 | grep -Ev 'utun|iot|docker|linkdown' | grep -Eo 'src.*' | grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | sort -u)
     [ -z "$local_ipv4" ] && local_ipv4=$(ip route 2>&1 | grep -Eo 'src.*' | grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | sort -u)

scripts/starts/fw_ipv6_watch.sh

@@ -0,0 +1,123 @@
+#!/bin/sh
+# Keep the nftables LAN IPv6 prefix set in sync with dynamic prefixes.
+
+[ -z "$CRASHDIR" ] && CRASHDIR=$(
+    cd "$(dirname "$0")"
+    cd ..
+    pwd
+)
+. "$CRASHDIR"/libs/get_config.sh
+. "$CRASHDIR"/starts/fw_getlanip.sh
+
+[ -z "$TMPDIR" ] && TMPDIR=/tmp/ShellCrash
+ipv6_watch_pid="$TMPDIR/ipv6_watch.pid"
+ipv6_watch_fifo="$TMPDIR/ipv6_route_monitor.$$"
+ipv6_nft_family=${SHELLCRASH_NFT_FAMILY:-inet}
+ipv6_nft_table=${SHELLCRASH_NFT_TABLE:-shellcrash}
+ipv6_nft_set=${SHELLCRASH_IPV6_SET:-lan_ip6}
+
+stop_ipv6_watch() {
+    [ -s "$ipv6_watch_pid" ] || return 0
+    ipv6_watch_old_pid=$(cat "$ipv6_watch_pid" 2>/dev/null)
+    case "$ipv6_watch_old_pid" in
+    '' | *[!0-9]*) ;;
+    *)
+        if [ ! -r "/proc/$ipv6_watch_old_pid/cmdline" ] ||
+            tr '\0' ' ' <"/proc/$ipv6_watch_old_pid/cmdline" 2>/dev/null | grep -q 'fw_ipv6_watch.sh'; then
+            kill "$ipv6_watch_old_pid" 2>/dev/null
+        fi
+        ;;
+    esac
+    rm -f "$ipv6_watch_pid"
+}
+
+cleanup_ipv6_watch() {
+    trap - EXIT INT TERM
+    [ -n "$ipv6_monitor_pid" ] && kill "$ipv6_monitor_pid" 2>/dev/null
+    [ -p "$ipv6_watch_fifo" ] && rm -f "$ipv6_watch_fifo"
+    if [ "$(cat "$ipv6_watch_pid" 2>/dev/null)" = "$$" ]; then
+        rm -f "$ipv6_watch_pid"
+    fi
+    exit 0
+}
+
+update_ipv6_set() {
+    lan_ifaces=$(get_lan_ifaces)
+    detected_host_ipv6=$(get_ipv6_prefixes)
+    build_host_ipv6 "$detected_host_ipv6"
+    ipv6_watch_state="$host_ipv6"
+
+    if [ "$ipv6_watch_state" = "$ipv6_watch_last_state" ] &&
+        nft list set "$ipv6_nft_family" "$ipv6_nft_table" "$ipv6_nft_set" >/dev/null 2>&1; then
+        return 0
+    fi
+
+    ipv6_watch_elements=$(echo "$host_ipv6" | sed 's/[[:space:]]\+/, /g')
+    [ -n "$ipv6_watch_elements" ] || return 1
+    nft list set "$ipv6_nft_family" "$ipv6_nft_table" "$ipv6_nft_set" >/dev/null 2>&1 || return 1
+
+    # nft processes a batch atomically, so packets never observe a partially
+    # updated set while an ISP prefix is being replaced.
+    printf 'flush set %s %s %s\nadd element %s %s %s { %s }\n' \
+        "$ipv6_nft_family" "$ipv6_nft_table" "$ipv6_nft_set" \
+        "$ipv6_nft_family" "$ipv6_nft_table" "$ipv6_nft_set" "$ipv6_watch_elements" |
+        nft -f - >/dev/null 2>&1 || return 1
+    ipv6_watch_last_state="$ipv6_watch_state"
+}
+
+run_iproute2_monitor() {
+    rm -f "$ipv6_watch_fifo"
+    mkfifo "$ipv6_watch_fifo" 2>/dev/null || return 1
+    ip -6 monitor route >"$ipv6_watch_fifo" 2>/dev/null &
+    ipv6_monitor_pid=$!
+    while IFS= read -r _ipv6_route_event; do
+        # Coalesce delete/add notifications emitted during renumbering.
+        sleep 1
+        update_ipv6_set
+    done <"$ipv6_watch_fifo"
+    wait "$ipv6_monitor_pid" 2>/dev/null
+    ipv6_monitor_pid=
+    rm -f "$ipv6_watch_fifo"
+    return 1
+}
+
+run_ipv6_watch() {
+    mkdir -p "$TMPDIR"
+    echo $$ >"$ipv6_watch_pid"
+    trap cleanup_ipv6_watch EXIT INT TERM
+    ipv6_watch_last_state=
+    update_ipv6_set
+
+    # Full iproute2 has event monitoring. BusyBox/router variants that do not
+    # support it use a small polling fallback instead.
+    if ip -Version 2>&1 | grep -qi 'iproute2'; then
+        run_iproute2_monitor
+    fi
+    while :; do
+        sleep 30
+        update_ipv6_set
+    done
+}
+
+case "$1" in
+start)
+    mkdir -p "$TMPDIR"
+    stop_ipv6_watch
+    /bin/sh "$0" run >/dev/null 2>&1 &
+    echo $! >"$ipv6_watch_pid"
+    ;;
+stop)
+    stop_ipv6_watch
+    ;;
+run)
+    run_ipv6_watch
+    ;;
+once)
+    ipv6_watch_last_state=
+    update_ipv6_set
+    ;;
+*)
+    echo "Usage: $0 {start|stop|run|once}" >&2
+    exit 1
+    ;;
+esac

scripts/starts/fw_nftables.sh

@@ -2,13 +2,22 @@
 # Copyright (C) Juewuy
 
 RESERVED_IP=$(echo $reserve_ipv4 | sed 's/[[:space:]]\+/, /g')
-RESERVED_IP6=$(echo "$reserve_ipv6 $host_ipv6" | sed 's/[[:space:]]\+/, /g')
+RESERVED_IP6=$(echo "$reserve_ipv6" | sed 's/[[:space:]]\+/, /g')
+
+start_nft_ipv6_set() {
+    HOST_IP6=$(echo "$host_ipv6" | sed 's/[[:space:]]\+/, /g')
+    nft list set inet shellcrash lan_ip6 >/dev/null 2>&1 ||
+        nft add set inet shellcrash lan_ip6 { type ipv6_addr \; flags interval \; auto-merge \; }
+    nft flush set inet shellcrash lan_ip6 2>/dev/null
+    [ -n "$HOST_IP6" ] && nft add element inet shellcrash lan_ip6 { $HOST_IP6 }
+}
 
 add_ip6_route(){
-    #过滤保留地址及本机地址
+    #过滤保留地址及当前局域网地址
     nft add rule inet shellcrash $1 ip6 daddr {$RESERVED_IP6} return
-    #仅代理本机局域网网段流量
+    nft add rule inet shellcrash $1 ip6 daddr @lan_ip6 return
-    nft add rule inet shellcrash $1 ip6 saddr != {$HOST_IP6} return
+    #OUTPUT只包含本机流量，无需依赖动态公网源前缀
+    [ "$1" = 'prerouting' ] && nft add rule inet shellcrash $1 ip6 saddr != @lan_ip6 return
     #绕过CN_IPV6
     [ "$dns_mod" != "fake-ip" -a "$cn_ip_route" = "ON" -a -f "$BINDIR"/cn_ipv6.txt ] && {
         CN_IP6=$(awk '{printf "%s, ",$1}' "$BINDIR"/cn_ipv6.txt)
@@ -83,10 +92,8 @@ start_nft_route() { #nftables-route通用工具
     }
     #局域网ipv6支持
     if [ "$ipv6_redir" = "ON" -a "$1" = 'prerouting' -a "$firewall_area" != 5 ]; then
-        HOST_IP6=$(echo $host_ipv6 | sed 's/[[:space:]]\+/, /g')
         add_ip6_route "$1"
     elif [ "$ipv6_redir" = "ON" -a "$1" = 'output' -a \( "$firewall_area" = 2 -o "$firewall_area" = 3 \) ]; then
-        HOST_IP6="::1, $(echo $host_ipv6 | sed 's/[[:space:]]\+/, /g')"
         add_ip6_route "$1"
     else
         nft add rule inet shellcrash $1 meta nfproto ipv6 return
@@ -106,7 +113,6 @@ start_nft_route() { #nftables-route通用工具
 start_nft_dns() { #nftables-dns
     [ "$1" = 'prerouting' ] && {
         HOST_IP=$(echo $host_ipv4 | sed 's/[[:space:]]\+/, /g')
-        HOST_IP6=$(echo $host_ipv6 | sed 's/[[:space:]]\+/, /g')
     }
     [ "$1" = 'output' ] && HOST_IP="127.0.0.0/8, $(echo $local_ipv4 | sed 's/[[:space:]]\+/, /g')"
     [ "$1" = 'prerouting_vm' ] && HOST_IP="$(echo $vm_ipv4 | sed 's/[[:space:]]\+/, /g')"
@@ -119,7 +125,7 @@ start_nft_dns() { #nftables-dns
     nft add rule inet shellcrash "$1"_dns meta skgid { 453, 7890 } return
     [ "$firewall_area" = 5 ] && nft add rule inet shellcrash "$1"_dns ip saddr $bypass_host return
     nft add rule inet shellcrash "$1"_dns ip saddr != {$HOST_IP} return                              #屏蔽外部请求
-    [ "$1" = 'prerouting' ] && nft add rule inet shellcrash "$1"_dns ip6 saddr != {$HOST_IP6} return #屏蔽外部请求
+    [ "$1" = 'prerouting' ] && nft add rule inet shellcrash "$1"_dns ip6 saddr != @lan_ip6 return #屏蔽外部请求
     #过滤局域网设备
     [ "$1" = 'prerouting' ] && [ -s "$CRASHDIR"/configs/mac ] && {
         MAC=$(awk '{printf "%s, ",$1}' "$CRASHDIR"/configs/mac)
@@ -134,7 +140,6 @@ start_nft_dns() { #nftables-dns
 }
 start_nft_wan() { #nftables公网防火墙
     HOST_IP=$(echo $host_ipv4 | sed 's/[[:space:]]\+/, /g')
-    HOST_IP6=$(echo $host_ipv6 | sed 's/[[:space:]]\+/, /g')
     nft add chain inet shellcrash input { type filter hook input priority -100 \; }
     nft add rule inet shellcrash input iif lo accept #本机请求全放行
     #端口放行
@@ -148,7 +153,7 @@ start_nft_wan() { #nftables公网防火墙
     #端口拦截
     reject_ports="{ $mix_port, $db_port }"
     nft add rule inet shellcrash input ip saddr {$HOST_IP} accept
-    nft add rule inet shellcrash input ip6 saddr {$HOST_IP6} accept
+    nft add rule inet shellcrash input ip6 saddr @lan_ip6 accept
     nft add rule inet shellcrash input tcp dport $reject_ports reject
     nft add rule inet shellcrash input udp dport $reject_ports reject
     #fw4特殊处理
@@ -160,6 +165,7 @@ start_nftables() { #nftables配置总入口
     #初始化nftables
     nft add table inet shellcrash 2>/dev/null
     nft flush table inet shellcrash 2>/dev/null
+    start_nft_ipv6_set
     #公网访问防火墙
     [ "$fw_wan" != OFF ] && [ "$systype" != 'container' ] && start_nft_wan
     #启动DNS劫持

scripts/starts/fw_start.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 # Copyright (C) Juewuy
 
+#停止旧的IPv6前缀监听，避免防火墙重建期间并发更新
+[ -f "$CRASHDIR"/starts/fw_ipv6_watch.sh ] && /bin/sh "$CRASHDIR"/starts/fw_ipv6_watch.sh stop
 #获取局域网host地址
 . "$CRASHDIR"/starts/fw_getlanip.sh && getlanip
 #缺省值
@@ -46,6 +48,9 @@
 #防火墙配置
 [ "$firewall_mod" = 'iptables' ] && . "$CRASHDIR"/starts/fw_iptables.sh && start_iptables
 [ "$firewall_mod" = 'nftables' ] && . "$CRASHDIR"/starts/fw_nftables.sh && start_nftables
+#动态更新nftables中的IPv6局域网前缀集合
+[ "$firewall_mod" = 'nftables' -a "$ipv6_redir" = "ON" ] &&
+    /bin/sh "$CRASHDIR"/starts/fw_ipv6_watch.sh start
 #修复部分虚拟机dns查询失败的问题
 [ "$firewall_area" = 2 -o "$firewall_area" = 3 ] && [ -z "$(grep '127.0.0.1' /etc/resolv.conf 2>/dev/null)" ] && [ "$systype" != 'container' ] && {
     line=$(grep -n 'nameserver' /etc/resolv.conf | awk -F: 'FNR==1{print $1}')

scripts/starts/fw_stop.sh

@@ -5,6 +5,8 @@
 [ -z "$CRASHDIR" ] && CRASHDIR=$( cd $(dirname $0);cd ..;pwd)
 . "$CRASHDIR"/libs/get_config.sh
 . "$CRASHDIR"/libs/check_cmd.sh
+#停止IPv6前缀监听
+[ -f "$CRASHDIR"/starts/fw_ipv6_watch.sh ] && /bin/sh "$CRASHDIR"/starts/fw_ipv6_watch.sh stop
 . "$CRASHDIR"/starts/fw_getlanip.sh && getlanip #获取局域网host地址
 #缺省值
 [ -z "$common_ports" ] && common_ports='ON'
@@ -172,4 +174,3 @@ ckcmd nft && nft delete table inet shellcrash >/dev/null 2>&1
 [ -s /etc/init.d/firewall.bak ] && mv -f /etc/init.d/firewall.bak /etc/init.d/firewall
 #others
 sed -i '/shellcrash-dns-repair/d' /etc/resolv.conf 2>/dev/null
-

tests/test_fw_ipv6_prefix.sh

@@ -0,0 +1,83 @@
+#!/bin/sh
+set -eu
+
+ROOT=$(cd "$(dirname "$0")/.." && pwd)
+. "$ROOT/scripts/starts/fw_getlanip.sh"
+
+assert_equal() {
+    if [ "$1" != "$2" ]; then
+        echo "expected: [$1]" >&2
+        echo "actual:   [$2]" >&2
+        exit 1
+    fi
+}
+
+route_output='default via fe80::1 dev eth0
+default from 240e:1234:5600::/56 via fe80::1 dev pppoe-wan
+2408:8266:501:2443::/64 dev enp2s0 proto kernel
+2606:4700::/48 via fe80::2 dev eth0
+unreachable 240e:1234:5600::/48 dev lo'
+actual=$(printf '%s\n' "$route_output" | ipv6_route_prefixes | sort -u)
+expected='2408:8266:501:2443::/64
+240e:1234:5600::/56'
+assert_equal "$expected" "$actual"
+
+# OpenWrt prefers the LAN assignment over the wider delegated prefix.
+systype=mi_snapshot
+lan_ifaces='br-lan'
+ubus() {
+    printf '%s\n' '{ "l3_device": "br-lan" }'
+}
+ip() {
+    case "$*" in
+    '-6 route show dev br-lan')
+        echo 'default from 240e:1234:5600::/56 via fe80::1 dev br-lan'
+        echo '240e:1234:5600:1::/64 dev br-lan proto static'
+        ;;
+    '-6 route show default') echo 'default from 240e:1234:5600::/56 via fe80::1 dev pppoe-wan' ;;
+    esac
+}
+actual=$(get_ipv6_prefixes)
+assert_equal '240e:1234:5600:1::/64' "$actual"
+
+# OpenWrt falls back to source-specific routes when its LAN route is hidden.
+lan_ifaces=
+ubus() {
+    return 0
+}
+ip() {
+    case "$*" in
+    '-6 route show default') echo 'default from 240e:1234:5600::/56 via fe80::1 dev pppoe-wan' ;;
+    esac
+}
+actual=$(get_ipv6_prefixes)
+assert_equal '240e:1234:5600::/56' "$actual"
+
+# Standard Linux uses the directly connected route on the discovered LAN.
+systype=container
+lan_ifaces='enp2s0'
+ip() {
+    case "$*" in
+    '-6 route show dev enp2s0') echo '2408:8266:501:2443::/64 dev enp2s0 proto kernel metric 256' ;;
+    esac
+}
+actual=$(get_ipv6_prefixes)
+assert_equal '2408:8266:501:2443::/64' "$actual"
+
+# BusyBox based router firmware does not need route protocol metadata.
+systype=Padavan
+lan_ifaces='br0'
+ip() {
+    case "$*" in
+    '-6 route show dev br0') echo '2001:db8:abcd:1::/64 dev br0 metric 256' ;;
+    esac
+}
+actual=$(get_ipv6_prefixes)
+assert_equal '2001:db8:abcd:1::/64' "$actual"
+
+ts_service=ON
+wg_service=OFF
+build_host_ipv6 '2408:8266:501:2443::/64 invalid-value'
+assert_equal '2408:8266:501:2443::/64 fd00::/8 fd7a:115c:a1e0::/48 fe80::/10' "$host_ipv6"
+
+echo 'IPv6 prefix tests passed'

tests/test_fw_nftables_ipv6.sh

@@ -0,0 +1,78 @@
+#!/bin/sh
+set -eu
+
+ROOT=$(cd "$(dirname "$0")/.." && pwd)
+
+reserve_ipv4='0.0.0.0/8 127.0.0.0/8'
+reserve_ipv6='::/128 ::1/128 fe80::/10 ff00::/8'
+host_ipv4='192.168.1.0/24'
+local_ipv4='192.168.1.1'
+host_ipv6='2001:db8:1::/64 fd00::/8 fe80::/10'
+common_ports=OFF
+ports=
+PORTS=
+mix_port=7890
+redir_port=7892
+tproxy_port=7893
+dns_redir_port=1053
+routing_mark=7894
+fwmark=7892
+firewall_area=3
+macfilter_type='黑名单'
+cn_ip_route=OFF
+dns_mod=route
+ipv6_redir=ON
+quic_rj=OFF
+lan_proxy=true
+local_proxy=true
+redir_mod=Tproxy
+tun_statu=false
+vm_redir=OFF
+fw_wan=ON
+fw_wan_ports=
+vms_port=
+sss_port=
+db_port=9090
+systype=linux
+CRASHDIR=/nonexistent
+BINDIR=/nonexistent
+
+nft() {
+    if [ "$1" = list ] && [ "$2" = set ]; then
+        return 1
+    fi
+    printf '%s' "$1"
+    shift
+    printf ' %s' "$@"
+    printf '\n'
+}
+
+modprobe() {
+    return 0
+}
+
+. "$ROOT/scripts/starts/fw_nftables.sh"
+rules=$(start_nftables || :)
+
+require_rule() {
+    if ! printf '%s\n' "$rules" | grep -Fq "$1"; then
+        echo "missing generated rule: $1" >&2
+        exit 1
+    fi
+}
+
+require_rule 'add set inet shellcrash lan_ip6'
+require_rule 'flags interval ; auto-merge'
+require_rule 'add element inet shellcrash lan_ip6'
+require_rule 'add rule inet shellcrash prerouting ip6 daddr @lan_ip6 return'
+require_rule 'add rule inet shellcrash prerouting ip6 saddr != @lan_ip6 return'
+require_rule 'add rule inet shellcrash prerouting_dns ip6 saddr != @lan_ip6 return'
+require_rule 'add rule inet shellcrash input ip6 saddr @lan_ip6 accept'
+require_rule 'add rule inet shellcrash output ip6 daddr @lan_ip6 return'
+
+if printf '%s\n' "$rules" | grep -Fq 'add rule inet shellcrash output ip6 saddr'; then
+    echo 'output must not depend on a dynamic IPv6 source prefix' >&2
+    exit 1
+fi
+
+echo 'nftables IPv6 rule generation tests passed'