171 lines
6.7 KiB
Bash
Executable file
171 lines
6.7 KiB
Bash
Executable file
#!/bin/bash
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# Name: ipfn
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# Version: 1.0.5
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# Date: 2026-01-22
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# Description: Added asterisk highlight for new handles and forced delete (-df).
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# sudo権限チェック
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if [ "$(id -u)" -ne 0 ]; then
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exec sudo "$0" "$@"
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fi
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TABLE_NAME="ipf_wrapper"
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QUIET=false
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PROTO="tcp"
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FORCE_DELETE=false
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# --- 初期化 ---
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init_nft() {
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nft add table inet ${TABLE_NAME} 2>/dev/null
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nft add chain inet ${TABLE_NAME} prerouting { type nat hook prerouting priority -100 \; } 2>/dev/null
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nft add chain inet ${TABLE_NAME} output { type nat hook output priority -100 \; } 2>/dev/null
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nft add chain inet ${TABLE_NAME} postrouting { type nat hook postrouting priority 100 \; } 2>/dev/null
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nft add chain inet ${TABLE_NAME} forward { type filter hook forward priority 0 \; policy accept \; } 2>/dev/null
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}
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# --- ルール表示 (アスタリスク強調対応) ---
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list_rules() {
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local highlight_uuid=$1
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init_nft
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echo "Forwarding Rules (ipfn):"
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printf "%-10s %-6s %-20s %-20s %-10s\n" "HANDLE" "PROTO" "LOCAL" "TARGET" "UUID"
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echo "-----------------------------------------------------------------------------------"
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nft -a list chain inet ${TABLE_NAME} prerouting | grep "dnat" | while read -r line; do
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handle=$(echo "$line" | grep -o 'handle [0-9]*' | awk '{print $2}')
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proto=$(echo "$line" | grep -q "udp" && echo "udp" || echo "tcp")
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target=$(echo "$line" | grep -oE '[0-9.]*:[0-9]+' | head -n 1)
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lport=$(echo "$line" | grep -o 'dport [0-9]*' | awk '{print $2}')
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full_uuid=$(echo "$line" | grep -o 'ipf-id:[a-z0-9-]*' | cut -d':' -f2)
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short_uuid="${full_uuid:0:8}"
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if [[ -n "$highlight_uuid" && "$full_uuid" == "$highlight_uuid" ]]; then
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# 新規ルールは HANDLE の前に * を付け、シアン太字で表示
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printf "\e[1;36m*%-9s %-6s %-20s %-20s %-10s\e[0m\n" "$handle" "$proto" ":$lport" "$target" "$short_uuid"
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else
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printf "%-10s %-6s %-20s %-20s %-10s\n" "$handle" "$proto" ":$lport" "$target" "$short_uuid"
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fi
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done
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}
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# --- ルール追加 ---
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add_rule() {
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init_nft
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local port_ip_port=$1
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local local_port=$(echo "$port_ip_port" | cut -d':' -f1)
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local target_ip=$(echo "$port_ip_port" | cut -d':' -f2)
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local target_port=$(echo "$port_ip_port" | cut -d':' -f3)
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local raw_uuid=$(cat /proc/sys/kernel/random/uuid)
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local uuid="ipf-id:$raw_uuid"
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local comment="comment \"$uuid\""
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local family="ip"
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[[ "$target_ip" =~ : ]] && family="ip6"
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nft add rule inet ${TABLE_NAME} prerouting "$PROTO" dport "$local_port" dnat $family to "$target_ip:$target_port" "$comment"
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nft add rule inet ${TABLE_NAME} output "$PROTO" dport "$local_port" dnat $family to "$target_ip:$target_port" "$comment"
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nft add rule inet ${TABLE_NAME} forward iifname "lo" accept "$comment"
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nft add rule inet ${TABLE_NAME} forward $family daddr "$target_ip" "$PROTO" dport "$target_port" ct state new,established,related accept "$comment"
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nft add rule inet ${TABLE_NAME} forward $family saddr "$target_ip" "$PROTO" sport "$target_port" ct state established,related accept "$comment"
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nft add rule inet ${TABLE_NAME} postrouting $family daddr "$target_ip" "$PROTO" dport "$target_port" masquerade "$comment"
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if [[ $QUIET == false ]]; then
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echo "ipfn: Rule added."
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echo ""
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list_rules "$raw_uuid"
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fi
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}
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# --- ルール削除 (強制削除フラグ対応) ---
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delete_rule() {
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init_nft
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local handle=$1
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local rule_info=$(nft -a list chain inet ${TABLE_NAME} prerouting | grep "handle $handle")
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if [[ -z "$rule_info" ]]; then
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echo "Error: Rule handle $handle not found."
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exit 1
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fi
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local uuid=$(echo "$rule_info" | grep -o 'ipf-id:[a-z0-9-]*' | head -n 1)
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local lport=$(echo "$rule_info" | grep -o 'dport [0-9]*' | awk '{print $2}')
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local target=$(echo "$rule_info" | grep -oE '[0-9.]*:[0-9]+' | head -n 1)
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local do_delete=false
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if [[ "$FORCE_DELETE" == true ]]; then
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do_delete=true
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else
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echo "About to delete rule group:"
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echo " Handle: $handle"
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echo " Local: :$lport"
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echo " Target: $target"
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echo -n "Are you sure? (y/N): "
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read -r confirm
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[[ "$confirm" =~ ^[yY]$ ]] && do_delete=true
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fi
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if [[ "$do_delete" == true ]]; then
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for chain in prerouting output forward postrouting; do
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nft -a list chain inet ${TABLE_NAME} "$chain" | grep "$uuid" | grep -o 'handle [0-9]*' | awk '{print $2}' | while read -r h; do
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nft delete rule inet ${TABLE_NAME} "$chain" handle "$h"
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done
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done
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echo "ipfn: Rule handle $handle deleted."
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echo ""
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list_rules
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else
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echo "Aborted."
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fi
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}
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# --- メイン処理 ---
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# 引数の前処理 (強制削除フラグの検出)
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TEMP_ARGS=()
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while [[ $# -gt 0 ]]; do
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case "$1" in
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-df) FORCE_DELETE=true; TEMP_ARGS+=("-d") ;;
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-f) # 削除コンテキストでのみ強制フラグとして動作
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FORCE_DELETE=true ;;
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*) TEMP_ARGS+=("$1") ;;
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esac
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shift
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done
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set -- "${TEMP_ARGS[@]}"
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while [[ $# -gt 0 ]]; do
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case "$1" in
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-L|-l) list_rules; exit 0 ;;
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-d) [[ -z "$2" ]] && { echo "Error: Handle required."; exit 1; }
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delete_rule "$2"; exit 0 ;;
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-t) # 疎通確認ロジック (ver 1.0.4と同様)
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local handle=$2
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local rule_line=$(nft -a list chain inet ${TABLE_NAME} prerouting | grep "handle $handle")
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if [[ -z "$rule_line" ]]; then echo "Error: Handle $handle not found."; exit 1; fi
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local lp=$(echo "$rule_line" | grep -o 'dport [0-9]*' | awk '{print $2}')
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echo "Testing :$lp..."
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nc -z -v -w 3 127.0.0.1 "$lp" 2>&1 | grep -E "succeeded|connected" && echo -e "\e[32mSuccess\e[0m" || echo -e "\e[31mFailed\e[0m"
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exit 0 ;;
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-p) PROTO="$2"; shift 2 ;;
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-q) QUIET=true; shift ;;
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-f_sys) # 内部用: 以前の -f (sysctl) は -f_sys またはメインループ外で処理
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sysctl -w net.ipv4.ip_forward=1 >/dev/null
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sysctl -w net.ipv4.conf.all.route_localnet=1 >/dev/null
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echo "Kernel parameters updated."; exit 0 ;;
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-v) nft list table inet ${TABLE_NAME}; exit 0 ;;
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*) break ;;
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esac
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shift
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done
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# 初期設定 (-f 単体で実行された場合などの互換性維持)
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if [[ "$FORCE_DELETE" == true && $# -eq 0 ]]; then
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# -f 単体ならカーネル設定を行う
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sysctl -w net.ipv4.ip_forward=1
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sysctl -w net.ipv4.conf.all.route_localnet=1
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exit 0
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fi
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if [[ -n "$1" ]]; then
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add_rule "$1"
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else
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echo "Usage: ipfn [PORT:IP:PORT | -L | -d HANDLE | -df HANDLE | -t HANDLE]"
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fi
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