-t 拡張
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251
ipfn
Executable file
251
ipfn
Executable file
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#!/bin/bash
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# Name: ipfn
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# Version: 1.2.4
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# Date: 2026-01-22
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# Description: Enhanced for VM/LXD/Docker with bridge-nf tuning and robust forwarding.
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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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PROTO="tcp"
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FORCE_FLAG=false
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SKIP_TEST=false
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QUIET_MODE=false
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# --- 1. Utility & Core Setup ---
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msg() { [[ "$QUIET_MODE" == false ]] && echo -e "$@"; }
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init_nft() {
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nft add table inet ${TABLE_NAME} 2>/dev/null
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# NAT Chains
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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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# Filter Chain (For VM/CT Forwarding)
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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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enable_forwarding() {
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msg "Optimizing kernel parameters for VM/LXD/Docker..."
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sysctl -w net.ipv4.ip_forward=1 >/dev/null
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sysctl -w net.ipv6.conf.all.forwarding=1 >/dev/null
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sysctl -w net.ipv4.conf.all.route_localnet=1 >/dev/null
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# ブリッジパケットをNetfilterに渡す設定 (存在する場合のみ)
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sysctl -w net.bridge.bridge-nf-call-iptables=1 2>/dev/null
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sysctl -w net.bridge.bridge-nf-call-ip6tables=1 2>/dev/null
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msg "\e[32mForwarding and Bridge-NF enabled.\e[0m"
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}
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show_help() {
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echo "Usage: ipfn [OPTIONS] [RULES]"
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echo ""
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echo "Rules Format:"
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echo " 80:10.10.100.5:8080 Full (LocalPort:TargetIP:TargetPort)"
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echo " 80:8080 IP defaults to 127.0.0.1"
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echo " 11434 Map same port to 127.0.0.1"
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echo ""
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echo "Options:"
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echo " -l, -L List all rules"
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echo " -d HANDLE/:PORT/all Delete specific rules or '*' for all"
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echo " -R Reset: Clear ALL rules immediately"
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echo " -q Quiet mode (No output, Auto-yes)"
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echo " -t [HANDLE] Test connectivity"
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echo " -f Enable IP forward & Bridge tuning / Skip test"
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echo " -v Verbose (raw nftables output)"
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echo " -h Show this help"
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}
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list_rules() {
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[[ "$QUIET_MODE" == true ]] && return
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local highlight_uuid=$1
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init_nft
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msg "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.]+|\[[0-9a-fA-F:]+\]):[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 "$line" | grep -o 'ipf-id:[a-z0-9-]*' | cut -d':' -f2)
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if [[ -n "$highlight_uuid" && "$full_uuid" == "$highlight_uuid" ]]; then
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printf "\e[1;36m*%-9s %-6s %-20s %-20s %-10s\e[0m\n" "$handle" "$proto" ":$lport" "$target" "${full_uuid:0:8}"
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else
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printf "%-10s %-6s %-20s %-20s %-10s\n" "$handle" "$proto" ":$lport" "$target" "${full_uuid:0:8}"
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fi
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done
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}
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test_rule_by_port() {
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[[ "$QUIET_MODE" == true ]] && return
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local lp=$1
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echo -n "Testing connectivity to :$lp... "
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if nc -z -v -w 2 127.0.0.1 "$lp" 2>&1 | grep -iqE "succeeded|connected|open"; then
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echo -e "\e[32mOK\e[0m"
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else
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echo -e "\e[31mFAILED\e[0m"
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fi
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}
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# --- 2. Deletion Logic ---
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validate_rule_handle() {
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nft -a list chain inet ${TABLE_NAME} prerouting | grep "handle $1" | grep -q "dnat"
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}
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all_clear() {
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if [[ "$FORCE_FLAG" == false ]]; then
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msg "\e[33mWarning: This will delete ALL forwarding rules.\e[0m"
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read -p "Are you sure? (y/N): " confirm
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[[ ! "$confirm" =~ ^[yY]$ ]] && exit 0
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fi
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nft delete table inet ${TABLE_NAME} 2>/dev/null
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init_nft
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msg "All rules cleared successfully."
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exit 0
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}
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parse_delete_targets() {
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local input=$1
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local -a final_handles=()
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[[ "$input" == "*" || "$input" == "all" ]] && all_clear
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IFS=',' read -r -a parts <<< "$input"
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for part in "${parts[@]}"; do
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if [[ "$part" =~ ^:([0-9]+)$ ]]; then
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local target_port="${BASH_REMATCH[1]}"
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local found_h=$(nft -a list chain inet ${TABLE_NAME} prerouting | grep "dport $target_port" | grep -o 'handle [0-9]*' | awk '{print $2}')
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for h in $found_h; do final_handles+=("$h"); done
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elif [[ "$part" =~ ^([0-9]+)-([0-9]+)$ ]]; then
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for ((i=${BASH_REMATCH[1]}; i<=${BASH_REMATCH[2]}; i++)); do
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validate_rule_handle "$i" && final_handles+=("$i")
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done
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else
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validate_rule_handle "$part" && final_handles+=("$part")
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fi
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done
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echo "${final_handles[@]}"
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}
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# --- 3. Adding Logic ---
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add_rule() {
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init_nft
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local raw_input=$1
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local lp tip tp
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if [[ "$raw_input" =~ ^([0-9]+):([0-9\.]+):([0-9]+)$ ]]; then
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lp=${BASH_REMATCH[1]}; tip=${BASH_REMATCH[2]}; tp=${BASH_REMATCH[3]}
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elif [[ "$raw_input" =~ ^([0-9]+):([0-9]+)$ ]]; then
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lp=${BASH_REMATCH[1]}; tip="127.0.0.1"; tp=${BASH_REMATCH[2]}
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elif [[ "$raw_input" =~ ^([0-9]+)$ ]]; then
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lp=${BASH_REMATCH[1]}; tip="127.0.0.1"; tp=${BASH_REMATCH[1]}
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else
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msg "\e[31mError: Invalid rule format '$raw_input'\e[0m"; exit 1
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fi
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local raw_uuid=$(cat /proc/sys/kernel/random/uuid)
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local uuid="ipf-id:$raw_uuid"
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local family="ip"; [[ "$tip" =~ : ]] && family="ip6"
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# DNAT
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nft add rule inet ${TABLE_NAME} prerouting "$PROTO" dport "$lp" dnat $family to "$tip:$tp" comment "\"$uuid\""
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nft add rule inet ${TABLE_NAME} output "$PROTO" dport "$lp" dnat $family to "$tip:$tp" comment "\"$uuid\""
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# FORWARD (VM/CT対応)
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nft add rule inet ${TABLE_NAME} forward $family daddr "$tip" "$PROTO" dport "$tp" ct state new,established,related accept comment "\"$uuid\""
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nft add rule inet ${TABLE_NAME} forward $family saddr "$tip" "$PROTO" sport "$tp" ct state established,related accept comment "\"$uuid\""
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nft add rule inet ${TABLE_NAME} forward iifname "lo" accept comment "\"$uuid\""
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# POSTROUTING (MASQUERADE: 戻りパケットの保証)
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nft add rule inet ${TABLE_NAME} postrouting $family daddr "$tip" "$PROTO" dport "$tp" masquerade comment "\"$uuid\""
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list_rules "$raw_uuid"
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[[ "$SKIP_TEST" == false ]] && { echo ""; test_rule_by_port "$lp"; }
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}
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# --- 4. Main Parsing ---
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for arg in "$@"; do
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[[ "$arg" =~ q ]] && QUIET_MODE=true && FORCE_FLAG=true && SKIP_TEST=true
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[[ "$arg" =~ f ]] && FORCE_FLAG=true && SKIP_TEST=true
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[[ "$arg" == "-R" ]] && RESET_MODE=true
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done
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if [[ "$RESET_MODE" == true ]]; then all_clear; fi
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if [[ $# -eq 0 ]]; then list_rules; exit 0; fi
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while [[ $# -gt 0 ]]; do
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case "$1" in
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-h|--help) show_help; exit 0 ;;
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-v|--verbose) nft list table inet ${TABLE_NAME}; exit 0 ;;
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-L|-l) list_rules; exit 0 ;;
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-f)
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enable_forwarding
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[[ $# -eq 1 ]] && exit 0 ;;
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-t*)
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h_str="${1#-t}"
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# 引数が空で、次に引数がある場合 (例: -t 80:)
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if [[ -z "$h_str" && -n "$2" ]]; then h_str="$2"; shift; fi
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local target_port=""
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if [[ "$h_str" =~ ^([0-9]+):$ ]]; then
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# パターン: -t 80: (ポート直接指定)
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target_port="${BASH_REMATCH[1]}"
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elif [[ -n "$h_str" ]]; then
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# パターン: -t 33 (ハンドル指定)
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target_port=$(nft -a list chain inet ${TABLE_NAME} prerouting | grep "handle $h_str" | grep -o 'dport [0-9]*' | awk '{print $2}')
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else
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# パターン: -t (引数なし、自動選択)
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count=$(nft list chain inet ${TABLE_NAME} prerouting | grep -c "dnat")
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if [ "$count" -eq 1 ]; then
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target_port=$(nft -a list chain inet ${TABLE_NAME} prerouting | grep "dnat" | grep -o 'dport [0-9]*' | awk '{print $2}')
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else
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msg "Error: Multiple rules exist. Use -t [HANDLE] or -t [PORT]:"; exit 1
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fi
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fi
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if [[ -n "$target_port" ]]; then
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test_rule_by_port "$target_port"
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else
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msg "Error: Could not identify port for test."
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fi
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exit 0 ;;
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-*[d]*)
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h_str=$(echo "$1" | sed -E 's/^-q?d?f?//')
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[[ -z "$h_str" ]] && { h_str="$2"; shift; }
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handles=($(parse_delete_targets "$h_str"))
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[[ ${#handles[@]} -eq 0 ]] && { msg "No valid targets."; exit 1; }
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if [[ "$FORCE_FLAG" == false ]]; then
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msg "Review rules to delete (Top-level only):"
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for h in "${handles[@]}"; do
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nft -a list chain inet ${TABLE_NAME} prerouting | grep "handle $h" | sed 's/^/ /'
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done
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read -p "Delete these rules and their sub-rules? (y/N): " confirm
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[[ ! "$confirm" =~ ^[yY]$ ]] && exit 0
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fi
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for h in "${handles[@]}"; do
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ri=$(nft -a list chain inet ${TABLE_NAME} prerouting | grep "handle $h")
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[[ -z "$ri" ]] && continue
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uuid=$(echo "$ri" | grep -o 'ipf-id:[a-z0-9-]*' | head -n 1)
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for c in prerouting output forward postrouting; do
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nft -a list chain inet ${TABLE_NAME} "$c" | grep "$uuid" | grep -o 'handle [0-9]*' | awk '{print $2}' | while read -r rh; do
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nft delete rule inet ${TABLE_NAME} "$c" handle "$rh"
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done
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done
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msg "Deleted associated with handle $h"
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done
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list_rules; exit 0 ;;
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*)
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if [[ "$1" =~ ^[0-9] ]]; then
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add_rule "$1"; exit 0
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else
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msg "\e[31mError: Unknown option '$1'\e[0m\n"; show_help; exit 1
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fi ;;
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esac
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shift
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done
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