Merge remote-tracking branch 'old-repo/master'

README.md

@@ -1,37 +1,41 @@
 
-このプロジェクトは、iptablesのルールを編集するためのスクリプトです。以下が使用方法とライセンス情報です。
+このプロジェクトは、nftablesのルールを編集するためのスクリプトです。以下が使用方法とライセンス情報です。
 
 ---
 
 ### 概要  
-このツールは、`iptables`のルールを編集する際のスクリプトであり、一時ファイルを作成し、エディタでルールを編集する処理を含みます。
+このツールは、`nftables`のルールを編集する際のスクリプトです。
 
 ---
 
 ### 使用方法  
-1. **ルールの編集**  
+**ルールの編集**  
    ```bash
-	ipf 11434:10.1.1.2:11434          # Forward local port 11434 to 10.1.1.2:11434
+   Usage: ipfn [OPTIONS] [RULES]
-	ipf -L                            # List all rules with numbers
-	ipf -d 1                          # Delete rule number 1
-	ipf -d 1 -q                       # Delete rule number 1 (quiet mode)
-	ipf -v                            # Show current iptables rules by iptables-save
-	ipf -e                            # Edit all rules in editor and restore
-   ```
-   ipf -e で一時ファイルが作成され、エディタ（例: `nano`）でルールを編集できます。編集が完了した後、一時ファイルは自動的に削除されます [1]。
 
-2. **バージョン情報の表示**  
+	Rules Format:
-   ```bash
+	80:10.10.100.5:8080   Full (LocalPort:TargetIP:TargetPort)
-	ipf --version     		  # Show version information
+	80:8080               IP defaults to 127.0.0.1
+	11434                 Map same port to 127.0.0.1
+
+	Options:
+	-l, -L                List all rules
+	-d HANDLE/:PORT/all   Delete specific rules or '*' for all
+	-R                    Reset: Clear ALL rules immediately
+	-q                    Quiet mode (No output, Auto-yes)
+	-t [HANDLE]           Test connectivity
+	-f                    Enable IP forward & Bridge tuning / Skip test
+	-v                    Verbose (raw nftables output)
+	-h                    Show this help
    ```
-   これにより、ソフトウェアのバージョンとライセンス情報が表示されます [1]。
+
 
 ---
 
 ### ライセンス  
 MIT License に基づくライセンスです。  
 **権利者**: krasherjoe  
-**日付**: 2025-10-26  
+**日付**: 2026-01-22  
 
 ---
 

ipf

@@ -0,0 +1,236 @@
+#!/bin/bash
+# Name: ipfn
+# Version: 1.2.4
+# Date: 2026-01-22
+# Description: Enhanced for VM/LXD/Docker with bridge-nf tuning and robust forwarding.
+
+if [ "$(id -u)" -ne 0 ]; then
+    exec sudo "$0" "$@"
+fi
+
+TABLE_NAME="ipf_wrapper"
+PROTO="tcp"
+FORCE_FLAG=false
+SKIP_TEST=false
+QUIET_MODE=false
+
+# --- 1. Utility & Core Setup ---
+
+msg() { [[ "$QUIET_MODE" == false ]] && echo -e "$@"; }
+
+init_nft() {
+    nft add table inet ${TABLE_NAME} 2>/dev/null
+    # NAT Chains
+    nft add chain inet ${TABLE_NAME} prerouting { type nat hook prerouting priority -100 \; } 2>/dev/null
+    nft add chain inet ${TABLE_NAME} output { type nat hook output priority -100 \; } 2>/dev/null
+    nft add chain inet ${TABLE_NAME} postrouting { type nat hook postrouting priority 100 \; } 2>/dev/null
+    # Filter Chain (For VM/CT Forwarding)
+    nft add chain inet ${TABLE_NAME} forward { type filter hook forward priority 0 \; policy accept \; } 2>/dev/null
+}
+
+enable_forwarding() {
+    msg "Optimizing kernel parameters for VM/LXD/Docker..."
+    sysctl -w net.ipv4.ip_forward=1 >/dev/null
+    sysctl -w net.ipv6.conf.all.forwarding=1 >/dev/null
+    sysctl -w net.ipv4.conf.all.route_localnet=1 >/dev/null
+    # ブリッジパケットをNetfilterに渡す設定 (存在する場合のみ)
+    sysctl -w net.bridge.bridge-nf-call-iptables=1 2>/dev/null
+    sysctl -w net.bridge.bridge-nf-call-ip6tables=1 2>/dev/null
+    msg "\e[32mForwarding and Bridge-NF enabled.\e[0m"
+}
+
+show_help() {
+    echo "Usage: ipfn [OPTIONS] [RULES]"
+    echo ""
+    echo "Rules Format:"
+    echo "  80:10.10.100.5:8080   Full (LocalPort:TargetIP:TargetPort)"
+    echo "  80:8080               IP defaults to 127.0.0.1"
+    echo "  11434                 Map same port to 127.0.0.1"
+    echo ""
+    echo "Options:"
+    echo "  -l, -L                List all rules"
+    echo "  -d HANDLE/:PORT/all   Delete specific rules or '*' for all"
+    echo "  -R                    Reset: Clear ALL rules immediately"
+    echo "  -q                    Quiet mode (No output, Auto-yes)"
+    echo "  -t [HANDLE]           Test connectivity"
+    echo "  -f                    Enable IP forward & Bridge tuning / Skip test"
+    echo "  -v                    Verbose (raw nftables output)"
+    echo "  -h                    Show this help"
+}
+
+list_rules() {
+    [[ "$QUIET_MODE" == true ]] && return
+    local highlight_uuid=$1
+    init_nft
+    msg "Forwarding Rules (ipfn):"
+    printf "%-10s %-6s %-20s %-20s %-10s\n" "HANDLE" "PROTO" "LOCAL" "TARGET" "UUID"
+    echo "-----------------------------------------------------------------------------------"
+    nft -a list chain inet ${TABLE_NAME} prerouting | grep "dnat" | while read -r line; do
+        handle=$(echo "$line" | grep -o 'handle [0-9]*' | awk '{print $2}')
+        proto=$(echo "$line" | grep -q "udp" && echo "udp" || echo "tcp")
+        target=$(echo "$line" | grep -oE '([0-9.]+|\[[0-9a-fA-F:]+\]):[0-9]+' | head -n 1)
+        lport=$(echo "$line" | grep -o 'dport [0-9]*' | awk '{print $2}')
+        full_uuid=$(echo "$line" | grep -o 'ipf-id:[a-z0-9-]*' | cut -d':' -f2)
+        if [[ -n "$highlight_uuid" && "$full_uuid" == "$highlight_uuid" ]]; then
+            printf "\e[1;36m*%-9s %-6s %-20s %-20s %-10s\e[0m\n" "$handle" "$proto" ":$lport" "$target" "${full_uuid:0:8}"
+        else
+            printf "%-10s %-6s %-20s %-20s %-10s\n" "$handle" "$proto" ":$lport" "$target" "${full_uuid:0:8}"
+        fi
+    done
+}
+
+test_rule_by_port() {
+    [[ "$QUIET_MODE" == true ]] && return
+    local lp=$1
+    echo -n "Testing connectivity to :$lp... "
+    if nc -z -v -w 2 127.0.0.1 "$lp" 2>&1 | grep -iqE "succeeded|connected|open"; then
+        echo -e "\e[32mOK\e[0m"
+    else
+        echo -e "\e[31mFAILED\e[0m"
+    fi
+}
+
+# --- 2. Deletion Logic ---
+
+validate_rule_handle() {
+    nft -a list chain inet ${TABLE_NAME} prerouting | grep "handle $1" | grep -q "dnat"
+}
+
+all_clear() {
+    if [[ "$FORCE_FLAG" == false ]]; then
+        msg "\e[33mWarning: This will delete ALL forwarding rules.\e[0m"
+        read -p "Are you sure? (y/N): " confirm
+        [[ ! "$confirm" =~ ^[yY]$ ]] && exit 0
+    fi
+    nft delete table inet ${TABLE_NAME} 2>/dev/null
+    init_nft
+    msg "All rules cleared successfully."
+    exit 0
+}
+
+parse_delete_targets() {
+    local input=$1
+    local -a final_handles=()
+    [[ "$input" == "*" || "$input" == "all" ]] && all_clear
+    IFS=',' read -r -a parts <<< "$input"
+    for part in "${parts[@]}"; do
+        if [[ "$part" =~ ^:([0-9]+)$ ]]; then
+            local target_port="${BASH_REMATCH[1]}"
+            local found_h=$(nft -a list chain inet ${TABLE_NAME} prerouting | grep "dport $target_port" | grep -o 'handle [0-9]*' | awk '{print $2}')
+            for h in $found_h; do final_handles+=("$h"); done
+        elif [[ "$part" =~ ^([0-9]+)-([0-9]+)$ ]]; then
+            for ((i=${BASH_REMATCH[1]}; i<=${BASH_REMATCH[2]}; i++)); do
+                validate_rule_handle "$i" && final_handles+=("$i")
+            done
+        else
+            validate_rule_handle "$part" && final_handles+=("$part")
+        fi
+    done
+    echo "${final_handles[@]}"
+}
+
+# --- 3. Adding Logic ---
+
+add_rule() {
+    init_nft
+    local raw_input=$1
+    local lp tip tp
+
+    if [[ "$raw_input" =~ ^([0-9]+):([0-9\.]+):([0-9]+)$ ]]; then
+        lp=${BASH_REMATCH[1]}; tip=${BASH_REMATCH[2]}; tp=${BASH_REMATCH[3]}
+    elif [[ "$raw_input" =~ ^([0-9]+):([0-9]+)$ ]]; then
+        lp=${BASH_REMATCH[1]}; tip="127.0.0.1"; tp=${BASH_REMATCH[2]}
+    elif [[ "$raw_input" =~ ^([0-9]+)$ ]]; then
+        lp=${BASH_REMATCH[1]}; tip="127.0.0.1"; tp=${BASH_REMATCH[1]}
+    else
+        msg "\e[31mError: Invalid rule format '$raw_input'\e[0m"; exit 1
+    fi
+
+    local raw_uuid=$(cat /proc/sys/kernel/random/uuid)
+    local uuid="ipf-id:$raw_uuid"
+    local family="ip"; [[ "$tip" =~ : ]] && family="ip6"
+
+    # DNAT
+    nft add rule inet ${TABLE_NAME} prerouting "$PROTO" dport "$lp" dnat $family to "$tip:$tp" comment "\"$uuid\""
+    nft add rule inet ${TABLE_NAME} output "$PROTO" dport "$lp" dnat $family to "$tip:$tp" comment "\"$uuid\""
+    
+    # FORWARD (VM/CT対応)
+    nft add rule inet ${TABLE_NAME} forward $family daddr "$tip" "$PROTO" dport "$tp" ct state new,established,related accept comment "\"$uuid\""
+    nft add rule inet ${TABLE_NAME} forward $family saddr "$tip" "$PROTO" sport "$tp" ct state established,related accept comment "\"$uuid\""
+    nft add rule inet ${TABLE_NAME} forward iifname "lo" accept comment "\"$uuid\""
+    
+    # POSTROUTING (MASQUERADE: 戻りパケットの保証)
+    nft add rule inet ${TABLE_NAME} postrouting $family daddr "$tip" "$PROTO" dport "$tp" masquerade comment "\"$uuid\""
+    
+    list_rules "$raw_uuid"
+    [[ "$SKIP_TEST" == false ]] && { echo ""; test_rule_by_port "$lp"; }
+}
+
+# --- 4. Main Parsing ---
+
+for arg in "$@"; do
+    [[ "$arg" =~ q ]] && QUIET_MODE=true && FORCE_FLAG=true && SKIP_TEST=true
+    [[ "$arg" =~ f ]] && FORCE_FLAG=true && SKIP_TEST=true
+    [[ "$arg" == "-R" ]] && RESET_MODE=true
+done
+
+if [[ "$RESET_MODE" == true ]]; then all_clear; fi
+
+if [[ $# -eq 0 ]]; then list_rules; exit 0; fi
+
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        -h|--help) show_help; exit 0 ;;
+        -v|--verbose) nft list table inet ${TABLE_NAME}; exit 0 ;;
+        -L|-l) list_rules; exit 0 ;;
+        -f)
+            enable_forwarding
+            [[ $# -eq 1 ]] && exit 0 ;;
+        -t*)
+            h_str="${1#-t}"
+            if [[ -z "$h_str" && ( "$2" =~ ^[0-9,-]+$ ) ]]; then h_str="$2"; shift; fi
+            if [[ -z "$h_str" ]]; then
+                count=$(nft list chain inet ${TABLE_NAME} prerouting | grep -c "dnat")
+                if [ "$count" -eq 1 ]; then
+                    h_str=$(nft -a list chain inet ${TABLE_NAME} prerouting | grep "handle" | awk '{print $NF}')
+                else
+                    msg "Error: Multiple rules exist. Specify a handle."; exit 1
+                fi
+            fi
+            lp=$(nft -a list chain inet ${TABLE_NAME} prerouting | grep "handle $h_str" | grep -o 'dport [0-9]*' | awk '{print $2}')
+            [[ -n "$lp" ]] && test_rule_by_port "$lp" || msg "Error: Handle $h_str not found."
+            exit 0 ;;
+        -*[d]*)
+            h_str=$(echo "$1" | sed -E 's/^-q?d?f?//')
+            [[ -z "$h_str" ]] && { h_str="$2"; shift; }
+            handles=($(parse_delete_targets "$h_str"))
+            [[ ${#handles[@]} -eq 0 ]] && { msg "No valid targets."; exit 1; }
+            if [[ "$FORCE_FLAG" == false ]]; then
+                msg "Review rules to delete (Top-level only):"
+                for h in "${handles[@]}"; do
+                    nft -a list chain inet ${TABLE_NAME} prerouting | grep "handle $h" | sed 's/^/  /'
+                done
+                read -p "Delete these rules and their sub-rules? (y/N): " confirm
+                [[ ! "$confirm" =~ ^[yY]$ ]] && exit 0
+            fi
+            for h in "${handles[@]}"; do
+                ri=$(nft -a list chain inet ${TABLE_NAME} prerouting | grep "handle $h")
+                [[ -z "$ri" ]] && continue
+                uuid=$(echo "$ri" | grep -o 'ipf-id:[a-z0-9-]*' | head -n 1)
+                for c in prerouting output forward postrouting; do
+                    nft -a list chain inet ${TABLE_NAME} "$c" | grep "$uuid" | grep -o 'handle [0-9]*' | awk '{print $2}' | while read -r rh; do
+                        nft delete rule inet ${TABLE_NAME} "$c" handle "$rh"
+                    done
+                done
+                msg "Deleted associated with handle $h"
+            done
+            list_rules; exit 0 ;;
+        *)
+            if [[ "$1" =~ ^[0-9] ]]; then
+                add_rule "$1"; exit 0
+            else
+                msg "\e[31mError: Unknown option '$1'\e[0m\n"; show_help; exit 1
+            fi ;;
+    esac
+    shift
+done

ipf1.0.4

@@ -1,395 +0,0 @@
-#!/bin/bash
-
-# sudo権限で実行されているか確認し、そうでなければsudoで再実行
-if [ "$(id -u)" -ne 0 ]; then
-    exec sudo "$0" "$@"
-fi
-
-# グローバル変数
-RULES_FILE="/tmp/iptables_forward_rules"
-QUIET=false
-PROTO="tcp"   # デフォルトプロトコル
-
-# コンテナ環境検出関数
-is_container() {
-    # systemd-detect-virt を使用してコンテナ環境を検出
-    if command -v systemd-detect-virt &> /dev/null; then
-        if systemd-detect-virt --quiet | grep -qE "container|vm"; then
-            return 0  # コンテナまたは仮想マシン環境
-        fi
-    fi
-
-    # lxc-checkconfig を使用して LXC コンテナを検出 (systemd-detect-virt がない場合)
-    if command -v lxc-checkconfig &> /dev/null; then
-        if lxc-checkconfig 2>&1 | grep -q "Running in an LXC container"; then
-            return 0 # LXC コンテナ環境
-        fi
-    fi
-
-    # その他 (LXD など) のコンテナ環境検出方法を追加可能
-
-    return 1 # コンテナ環境ではない
-}
-
-
-# ヘルプ表示
-show_help() {
-    cat << EOF
-Usage: ipf [OPTIONS] [PORT:IP:PORT | -L | -d RULE_NUMBER]
-
-Examples:
-  ipf 11434:10.1.1.2:11434          # Forward local port 11434 to 10.1.1.2:11434
-  ipf -L                            # List all rules with numbers
-  ipf -d 1                          # Delete rule number 1
-  ipf -d 1 -q                       # Delete rule number 1 (quiet mode)
-  ipf -v                            # Show current iptables rules by iptables-save
-  ipf -e                            # Edit all rules in editor and restore
-  ipf -f                            # Enable IP forwarding
-  ipf -t 1                          # Test rule number 1
-  ipf -t 11434:10.10.1.2:11434      # Test rule by specification
-  ipf -p udp 11434:10.1.1.2:11434   # Forward using UDP
-
-Options:
-  -h, --help     Show this help message
-  -L, -l         List all rules
-  -d NUM         Delete rule by number
-  -q             Quiet mode (no output)
-  -v             Show current iptables rules (via iptables-save)
-  -e             Edit all rules in editor and restore
-  -f             Enable IP forwarding and localnet routing
-  -t ARG          Test connectivity for rule number or PORT:IP:PORT
-  -p PROTO        Specify protocol (tcp|udp) for the following rule
-  --version      Show version information
-
-NOTE:
-  All port forwarding is performed using DNAT only.  No MASQUERADE (SNAT) is applied,
-  so the original source IP of the client is preserved.  This ensures that
-  fail2ban logs the correct client IP on the destination server.
-EOF
-}
-
-# バージョン情報を表示
-show_version() {
-    cat << EOF
-ipf ver.1.0.4
-Date: 2025-10-26
-Created by: qwen3/gpt-oss/gemini-2.5-pro and krasherjoe
-
----
-MIT License
-
-Copyright (c) 2025 krasherjoe
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
----
-
-** WARNING / 注意 **
-This script operates with administrative privileges (sudo) to modify your system's
-firewall (iptables) rules. Incorrect use, especially with the -e (edit) option,
-can disrupt your network connectivity or overwrite existing security rules.
-Please use with caution and understand the changes you are making.
-
-このスクリプトは管理者権限(sudo)で動作し、システムのファイアウォール(iptables)ルールを
-直接変更します。特に -e (編集) オプションの誤った使用は、ネットワーク接続を中断させたり、
-既存のセキュリティルールを上書きする危険性があります。
-コンテナ環境ではMASQUERADEを使用するため、クライアントの元のIPアドレスが隠蔽されます。
-これにより、fail2banなどのツールが不正な行為者を正しく識別し、ブロックできなくなる可能性があります。
-セキュリティへの影響を考慮してください。
-内容をよく理解した上で、注意して使用してください。
-EOF
-}
-
-# エラーメッセージを表示
-error() {
-    echo "Error: $*" >&2
-    logger -p user.err "ipf: $*"
-    exit 1
-}
-
-# ルールの保存
-save_rules() {
-    iptables-save > "$RULES_FILE"
-}
-
-# ルールの読み込み
-load_rules() {
-    if [[ -f "$RULES_FILE" ]]; then
-        iptables-restore < "$RULES_FILE"
-    fi
-}
-
-# ルール番号と内容をリスト表示
-list_rules() {
-    local i=1
-    echo "Forwarding rules:"
-    iptables -t nat -L PREROUTING -n -v --line-numbers | grep -E '^[0-9]+' | while read -r line; do
-        echo "$i: $line"
-        ((i++))
-    done
-}
-
-# ルールを削除
-delete_rule() {
-    local num=$1
-    if ! [[ "$num" =~ ^[0-9]+$ ]]; then
-        error "Invalid rule number: $num"
-    fi
-
-    # ユーザーへの表示用に整形されたルール行を取得
-    local rule_line_verbose=$(iptables -t nat -L PREROUTING --line-numbers | grep -E "^$num\s+" | head -n 1)
-    if [[ -z "$rule_line_verbose" ]]; then
-        error "No rule found with number: $num"
-    fi
-
-    # パース用に-nオプションを付けたルール行を取得
-    local rule_line_numeric=$(iptables -t nat -L PREROUTING -n --line-numbers | grep -E "^\s*$num\s+" | head -n 1)
-    if [[ -z "$rule_line_numeric" ]]; then
-        error "Could not find numeric rule for number: $num" # Should not happen
-    fi
-
-    # ルールから詳細を抽出 (sedを使い、より堅牢に)
-    local line_details=$(echo "$rule_line_numeric" | sed -n 's/.*\(tcp\|udp\).*dpt:\([0-9]*\).*to:\([0-9.]*\):\([0-9]*\).*/\1 \2 \3 \4/p')
-    if [[ -z "$line_details" ]]; then
-        error "Could not parse rule details from line: $rule_line_numeric"
-    fi
-    read -r proto local_port target_ip target_port <<< "$line_details"
-
-    # 1. PREROUTING ルールを番号で削除
-    if ! iptables -t nat -D PREROUTING "$num"; then
-        error "Failed to delete PREROUTING rule $num"
-    fi
-
-    # 2. 対応する OUTPUT ルールをすべて削除
-    while iptables -t nat -D OUTPUT -p "$proto" -m "$proto" --dport "$local_port" -j DNAT --to-destination "$target_ip:$target_port" >/dev/null 2>&1; do :; done
-
-    # 3. 対応する FORWARD ルールをすべて削除
-    while iptables -D FORWARD -p "$proto" -m "$proto" -d "$target_ip" --dport "$target_port" -j ACCEPT >/dev/null 2>&1; do :; done
-
-    # 4. 確立済み通信を許可するルールを削除 (存在確認後に削除)
-    if iptables -C FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT 2>/dev/null; then
-        iptables -D FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT >/dev/null 2>&1
-    fi
-
-    if ! $QUIET; then
-        echo "Deleted rule $num: $rule_line_verbose"
-    fi
-}
-
-# ポートフォワーディングルールを追加
-add_rule() {
-    # IPフォワーディングが有効かチェック
-    if [[ $(sysctl -n net.ipv4.ip_forward) -ne 1 ]]; then
-        error "IP forwarding is disabled. Please enable it by running: ipf -f"
-    fi
-
-    local container_env=$(is_container)
-    if [[ $container_env -eq 0 ]]; then
-        echo -e "\e[33mDetected container environment.  MASQUERADE is enabled, which hides the original client IP address.  This will prevent tools like fail2ban from correctly identifying and blocking malicious actors. Consider the security implications.\e[0m" # コンテナ環境であることを示すメッセージ
-    fi
-
-    # 確立済みの通信は許可する (戻りのパケットのため)
-    iptables -I FORWARD 1 -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
-
-    local port_ip_port=$1
-    local local_port=$(echo "$port_ip_port" | cut -d':' -f1)
-    local target_ip=$(echo "$port_ip_port" | cut -d':' -f2)
-    local target_port=$(echo "$port_ip_port" | cut -d':' -f3)
-
-    # IPアドレス検証
-    if ! [[ "$target_ip" =~ ^([0-9]{1,3}\.){3}[0-9]{1,3}$ ]]; then
-        error "Invalid IP address: $target_ip"
-    fi
-
-    # ポート番号検証
-    if ! [[ "$local_port" =~ ^[0-9]+$ ]] || ! [[ "$target_port" =~ ^[0-9]+$ ]]; then
-        error "Invalid port number"
-    fi
-    if (( local_port < 1 || local_port > 65535 || target_port < 1 || target_port > 65535 )); then
-        error "Port number out of range (1-65535)"
-    fi
-
-    # iptablesでルールを追加
-    # 外部からのパケットを対象
-    iptables -t nat -A PREROUTING -p "$PROTO" -m "$PROTO" --dport "$local_port" -j DNAT --to-destination "$target_ip:$target_port"
-    # ローカルで生成されたパケットを対象
-    iptables -t nat -A OUTPUT -p "$PROTO" -m "$PROTO" --dport "$local_port" -j DNAT --to-destination "$target_ip:$target_port"
-
-    if [[ $container_env -eq 0 ]]; then
-        # コンテナ環境ではMASQUERADEを使用
-        iptables -t nat -A POSTROUTING -p "$PROTO" -m "$PROTO" -d "$target_ip" --dport "$target_port" -j MASQUERADE
-    fi
-
-    # 転送されるパケットを許可する
-    iptables -A FORWARD -p "$PROTO" -m "$PROTO" -d "$target_ip" --dport "$target_port" -j ACCEPT
-
-    if ! $QUIET; then
-        echo "Rule added: port $local_port -> $target_ip:$target_port (proto=$PROTO)"
-    fi
-}
-
-# ルールを編集して復元
-edit_rules() {
-    local temp_file
-    temp_file=$(mktemp -t iptables.rules.XXXXXX) || error "Failed to create temporary file"
-    chmod 0600 "$temp_file"
-    trap 'rm -f "$temp_file"' EXIT
-
-    # 現在のルールを一時ファイルに保存
-    iptables-save > "$temp_file"
-
-    # エディタを決定
-    local editor=${EDITOR:-nano}
-    if ! command -v "$editor" > /dev/null; then
-        editor=vi
-    fi
-
-    # nanoで編集
-    if ! "$editor" "$temp_file"; then
-        error "Editor closed without saving or an error occurred."
-    fi
-
-    # 編集後の内容でリストア
-    if iptables-restore < "$temp_file"; then
-        echo "iptables rules restored successfully from your edits."
-        echo "--- Displaying new rules ---"
-        iptables-save
-    else
-        error "Failed to restore iptables rules. Please check for syntax errors in your edits."
-    fi
-}
-
-# 疎通確認用関数
-test_rule() {
-    local arg=$1
-    local local_port target_ip target_port
-
-    if [[ "$arg" =~ ^[0-9]+$ ]]; then
-        # rule number → ルール行を取得
-        local line=$(iptables -t nat -L PREROUTING -n --line-numbers | grep "^$arg ")
-        if [[ -z "$line" ]]; then
-            error "No rule found with number: $arg"
-        fi
-        local_port=$(echo "$line" | awk '{print $8}'|cut -d ':' -f2)
-        target_ip=$(echo "$line" | awk -F: '{print $1}')
-        target_port=$(echo "$line" | awk -F: '{print $2}')
-    else
-        # 文字列形式
-        local_port=$(echo "$arg" | cut -d':' -f1)
-        target_ip=$(echo "$arg" | cut -d':' -f2)
-        target_port=$(echo "$arg" | cut -d':' -f3)
-    fi
-
-    echo "Testing connectivity to local port \"$(tput setaf 3)nc -z -w 5 127.0.0.1 $local_port$(tput sgr0)\""
-    if nc -z -w 5 127.0.0.1 "$local_port" 2>/dev/null; then
-        echo "$(tput setaf 6)Connection successful.$(tput sgr0)"
-    else
-        echo "$(tput setaf 1)Connection failed.$(tput sgr0)"
-    fi
-}
-
-# メイン処理
-main() {
-    # オプション解析
-    while [[ $# -gt 0 ]]; do
-        case "$1" in
-            -h|--help)
-                show_help
-                exit 0
-                ;;
-            -L|-l)
-                list_rules
-                exit 0
-                ;;
-            -v)
-                iptables-save | grep -v '^#' | less -R
-                exit 0
-                ;;
-            -e)
-                edit_rules
-                exit 0
-                ;;
-            -f)
-                if sysctl -w net.ipv4.ip_forward=1 > /dev/null && \
-                   sysctl -w net.ipv4.conf.all.route_localnet=1 > /dev/null && \
-                   sysctl -w net.ipv4.conf.default.route_localnet=1 > /dev/null; then
-                    echo "IP forwarding and localnet routing enabled."
-                else
-                    error "Failed to enable kernel parameters."
-                fi
-                exit 0
-                ;;
-            --version)
-                show_version
-                exit 0
-                ;;
-            -d)
-                if [[ $# -lt 2 ]]; then
-                    error "Missing rule number for -d option"
-                fi
-                delete_rule "$2"
-                exit 0
-                ;;
-            -t)
-                if [[ $# -lt 2 ]]; then
-                    error "Missing argument for -t option"
-                fi
-                test_rule "$2"
-                exit 0
-                ;;
-            -q)
-                QUIET=true
-                shift
-                ;;
-            -p)
-                if [[ $# -lt 2 ]]; then
-                    error "Missing protocol after -p"
-                fi
-                if [[ "$2" != "tcp" && "$2" != "udp" ]]; then
-                    error "Unsupported protocol: $2"
-                fi
-                PROTO="$2"
-                shift 2
-                ;;
-            -*)
-                error "Unknown option: $1"
-                ;;
-            *)
-                break
-                ;;
-        esac
-    done
-
-    # 引数が残っていれば、ルール追加処理
-    if [[ $# -eq 0 ]]; then
-        show_help
-        exit 1
-    fi
-
-    local arg=$1
-
-    # ルール追加処理
-    if [[ "$arg" =~ ^[0-9]+:[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+:[0-9]+$ ]]; then
-        add_rule "$arg"
-    else
-        error "Invalid format. Expected: PORT:IP:PORT or -L or -d RULE_NUMBER"
-    fi
-}
-
-# 実行
-main "$@"