ipfnからipfに改名 1.4.7
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1 changed files with 224 additions and 0 deletions
224
ipfn
Executable file
224
ipfn
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#!/bin/bash
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# Name: ipfn
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# Version: 1.4.6
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# Date: 2026-01-22
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# Description: Restored full help message and kept fixed regex for multi-pattern testing.
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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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VERSION="1.4.6"
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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. Functions ---
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show_help() {
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echo "ipfn version ${VERSION}"
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echo "Usage: ipfn [OPTIONS] [RULES]"
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echo ""
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echo "Options:"
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echo " -l, -L List all forwarding rules"
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echo " -d HANDLE/:PORT/all Delete by handle, port (e.g. :80), or 'all'"
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echo " -R Reset: Clear ALL rules immediately"
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echo " -t [TARGET] Test connectivity (See 'Test Patterns' below)"
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echo " -f Force: No confirmation & Skip test"
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echo " -q Quiet mode: No output (implies -f)"
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echo " -h, --help Show this help message"
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echo ""
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echo "Rules Syntax:"
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echo " LPORT:TIP:TPORT Forward LPORT to TIP:TPORT (e.g. 80:10.0.0.1:80)"
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echo " LPORT:TPORT Forward LPORT to 127.0.0.1:TPORT"
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echo " LPORT Forward LPORT to 127.0.0.1:LPORT"
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echo ""
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echo "Test Patterns (-t):"
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echo " -t 5 Strict test: Verify Handle 5 (Entry -> Exit -> Counter)"
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echo " -t :80 Simple test: Check if Local port :80 is open"
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echo " -t 1.1.1.1:80 Direct test: Check if Target 1.1.1.1:80 is UP"
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echo " -t 80:1.1.1.1:80 Full test: Check both Target UP and Local :80 OPEN"
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echo ""
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echo "Note: New rules are INSERTED at the top (Latest rule takes priority)."
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}
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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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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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get_total_packets() {
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local uuid=$1
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local total=0
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local counts=$(nft list table inet "${TABLE_NAME}" 2>/dev/null | grep "$uuid" | grep -o 'packets [0-9]*' | awk '{print $2}')
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for c in $counts; do total=$((total + c)); done
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echo "$total"
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}
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test_connection() {
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local ip=$1
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local port=$2
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nc -z -v -w 1 "$ip" "$port" >/dev/null 2>&1
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}
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test_strict_handle() {
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local h=$1
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local info=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "handle $h")
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[[ -z "$info" ]] && { echo -e "Handle $h \e[31mNOT FOUND\e[0m"; return; }
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local lp=$(echo "$info" | grep -o 'dport [0-9]*' | awk '{print $2}')
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local target=$(echo "$info" | grep -oE 'to ([0-9.]+|\[[0-9a-fA-F:]+\]):[0-9]+' | awk '{print $2}')
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local tip=$(echo "$target" | cut -d':' -f1 | tr -d '[]')
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local tp=$(echo "$target" | cut -d':' -f2)
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local uuid=$(echo "$info" | grep -o 'ipf-id:[a-z0-9-]*')
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local short_id=$(echo "$uuid" | cut -d':' -f2 | cut -c1-8)
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echo -n "Testing handle $h (Local :$lp -> Target $tip:$tp) [${short_id}]... "
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local count_before=$(get_total_packets "$uuid")
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if test_connection "$tip" "$tp"; then
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nc -z -v -w 1 127.0.0.1 "$lp" >/dev/null 2>&1
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sleep 0.1
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local count_after=$(get_total_packets "$uuid")
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if (( count_after > count_before )); then
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echo -e "\e[32mPASSED (Rule active & Target UP)\e[0m"
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else
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echo -e "\e[33mSKIPPED (Target UP, but blocked by prior rule)\e[0m"
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fi
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else
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nc -z -v -w 1 127.0.0.1 "$lp" >/dev/null 2>&1
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sleep 0.1
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local count_after=$(get_total_packets "$uuid")
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if (( count_after > count_before )); then
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echo -e "\e[33mOFFLINE (Rule matched, but Target Down)\e[0m"
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else
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echo -e "\e[31mFAILED (Target Down & Rule blocked)\e[0m"
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fi
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fi
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}
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list_rules() {
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[[ "$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 2>/dev/null | 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" "${full_uuid:0:8}"
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else
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printf " %-9s %-6s %-20s %-20s %-10s\n" "$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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all_clear() {
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if [[ "$FORCE_FLAG" == false ]]; then
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echo -e "\e[33mWarning: This will delete ALL forwarding rules.\e[0m"
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read -p "Are you sure? (y/N): " confirm
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[[ ! "$confirm" =~ ^[yY]$ ]] && exit 0
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fi
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nft delete table inet "${TABLE_NAME}" 2>/dev/null
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init_nft; msg "All rules cleared successfully."; list_rules; exit 0
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}
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# --- 2. Flag Pre-processing ---
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for arg in "$@"; 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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[[ "$arg" == "-R" ]] && RESET_MODE=true
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[[ "$arg" == "--version" ]] && { echo "ipfn version ${VERSION}"; exit 0; }
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done
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if [[ "$RESET_MODE" == true ]]; then all_clear; fi
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if [[ $# -eq 0 ]]; then list_rules; exit 0; fi
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# --- 3. Main Loop ---
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while [[ $# -gt 0 ]]; do
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case "$1" in
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-h|--help) show_help; exit 0 ;;
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-L|-l) list_rules; exit 0 ;;
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-*[d]*)
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h_str=$(echo "$1" | sed -E 's/^-q?d?f?//')
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[[ -z "$h_str" ]] && { h_str="$2"; shift; }
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if [[ "$h_str" == "all" || "$h_str" == "*" ]]; then all_clear; fi
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handles=()
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IFS=',' read -r -a parts <<< "$h_str"
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for part in "${parts[@]}"; do
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if [[ "$part" =~ ^:([0-9]+)$ ]]; then
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p="${BASH_REMATCH[1]}"
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for h in $(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "dport $p" | grep -o 'handle [0-9]*' | awk '{print $2}'); do handles+=("$h"); done
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else handles+=("$part"); fi
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done
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for h in "${handles[@]}"; do
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uuid=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "handle $h" | grep -o 'ipf-id:[a-z0-9-]*')
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[[ -z "$uuid" ]] && continue
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for c in prerouting output forward postrouting; do
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nft -a list chain inet "${TABLE_NAME}" "$c" 2>/dev/null | 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 handle $h"
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done
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list_rules; exit 0 ;;
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-t*)
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h_str="${1#-t}"; [[ -z "$h_str" && -n "$2" ]] && { h_str="$2"; shift; }
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if [[ "$h_str" =~ ^([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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echo -n "Checking Target $tip:$tp... "
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test_connection "$tip" "$tp" && echo -e "\e[32mUP\e[0m" || echo -e "\e[31mDOWN\e[0m"
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echo -n "Checking Local :$lp... "
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nc -z -v -w 1 127.0.0.1 "$lp" >/dev/null 2>&1 && echo -e "\e[32mOPEN\e[0m" || echo -e "\e[31mCLOSED\e[0m"
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elif [[ "$h_str" =~ ^([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+):([0-9]+)$ ]]; then
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tip=${BASH_REMATCH[1]}; tp=${BASH_REMATCH[2]}
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echo -n "Checking Target $tip:$tp... "
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test_connection "$tip" "$tp" && echo -e "\e[32mUP\e[0m" || echo -e "\e[31mDOWN\e[0m"
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elif [[ "$h_str" =~ ^:([0-9]+)$ || "$h_str" =~ ^([0-9]+):$ ]]; then
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p="${BASH_REMATCH[1]}${BASH_REMATCH[2]}"
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echo -n "Checking Local :$p... "
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nc -z -v -w 1 127.0.0.1 "$p" >/dev/null 2>&1 && echo -e "\e[32mOK\e[0m" || echo -e "\e[31mOFFLINE\e[0m"
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elif [[ "$h_str" =~ ^[0-9]+$ ]]; then
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test_strict_handle "$h_str"
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else
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top_h=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "dnat" | head -n 1 | grep -o 'handle [0-9]*' | awk '{print $2}')
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[[ -n "$top_h" ]] && test_strict_handle "$top_h" || msg "Error: No rules to test."
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fi
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exit 0 ;;
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[0-9]*)
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init_nft; raw="$1"
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if [[ "$raw" =~ ^([0-9]+):([0-9\.]+):([0-9]+)$ ]]; then lp=${BASH_REMATCH[1]}; tip=${BASH_REMATCH[2]}; tp=${BASH_REMATCH[3]}
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elif [[ "$raw" =~ ^([0-9]+):([0-9]+)$ ]]; then lp=${BASH_REMATCH[1]}; tip="127.0.0.1"; tp=${BASH_REMATCH[2]}
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elif [[ "$raw" =~ ^([0-9]+)$ ]]; then lp=${BASH_REMATCH[1]}; tip="127.0.0.1"; tp=${BASH_REMATCH[1]}
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fi
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u_raw=$(cat /proc/sys/kernel/random/uuid); u="ipf-id:$u_raw"; fam="ip"; [[ "$tip" =~ : ]] && fam="ip6"
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nft insert rule inet "${TABLE_NAME}" prerouting "$PROTO" dport "$lp" counter dnat $fam to "$tip:$tp" comment "\"$u\""
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nft insert rule inet "${TABLE_NAME}" output "$PROTO" dport "$lp" counter dnat $fam to "$tip:$tp" comment "\"$u\""
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nft insert rule inet "${TABLE_NAME}" forward $fam daddr "$tip" "$PROTO" dport "$tp" ct state new,established,related accept comment "\"$u\""
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nft insert rule inet "${TABLE_NAME}" forward $fam saddr "$tip" "$PROTO" sport "$tp" ct state established,related accept comment "\"$u\""
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nft insert rule inet "${TABLE_NAME}" forward iifname "lo" accept comment "\"$u\""
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nft insert rule inet "${TABLE_NAME}" postrouting $fam daddr "$tip" "$PROTO" dport "$tp" masquerade comment "\"$u\""
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list_rules "$u_raw"
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if [[ "$SKIP_TEST" == false ]]; then
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new_h=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "$u_raw" | grep -o 'handle [0-9]*' | awk '{print $2}')
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echo ""; test_strict_handle "$new_h"
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fi
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exit 0 ;;
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*) msg "Error: Unknown option '$1'"; exit 1 ;;
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esac
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shift
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done
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