From c0f1226ec5f6fbd98fd5c3d882ab9e4c6ff869e6 Mon Sep 17 00:00:00 2001 From: joe Date: Thu, 22 Jan 2026 20:17:48 +0900 Subject: [PATCH] =?UTF-8?q?ipfn=E3=81=8B=E3=82=89ipf=E3=81=AB=E6=94=B9?= =?UTF-8?q?=E5=90=8D=201.4.7?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ipfn | 224 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 224 insertions(+) create mode 100755 ipfn diff --git a/ipfn b/ipfn new file mode 100755 index 0000000..829ef83 --- /dev/null +++ b/ipfn @@ -0,0 +1,224 @@ +#!/bin/bash +# Name: ipfn +# Version: 1.4.6 +# Date: 2026-01-22 +# Description: Restored full help message and kept fixed regex for multi-pattern testing. + +if [ "$(id -u)" -ne 0 ]; then + exec sudo "$0" "$@" +fi + +TABLE_NAME="ipf_wrapper" +VERSION="1.4.6" +PROTO="tcp" +FORCE_FLAG=false +SKIP_TEST=false +QUIET_MODE=false + +# --- 1. Functions --- + +show_help() { + echo "ipfn version ${VERSION}" + echo "Usage: ipfn [OPTIONS] [RULES]" + echo "" + echo "Options:" + echo " -l, -L List all forwarding rules" + echo " -d HANDLE/:PORT/all Delete by handle, port (e.g. :80), or 'all'" + echo " -R Reset: Clear ALL rules immediately" + echo " -t [TARGET] Test connectivity (See 'Test Patterns' below)" + echo " -f Force: No confirmation & Skip test" + echo " -q Quiet mode: No output (implies -f)" + echo " -h, --help Show this help message" + echo "" + echo "Rules Syntax:" + echo " LPORT:TIP:TPORT Forward LPORT to TIP:TPORT (e.g. 80:10.0.0.1:80)" + echo " LPORT:TPORT Forward LPORT to 127.0.0.1:TPORT" + echo " LPORT Forward LPORT to 127.0.0.1:LPORT" + echo "" + echo "Test Patterns (-t):" + echo " -t 5 Strict test: Verify Handle 5 (Entry -> Exit -> Counter)" + echo " -t :80 Simple test: Check if Local port :80 is open" + echo " -t 1.1.1.1:80 Direct test: Check if Target 1.1.1.1:80 is UP" + echo " -t 80:1.1.1.1:80 Full test: Check both Target UP and Local :80 OPEN" + echo "" + echo "Note: New rules are INSERTED at the top (Latest rule takes priority)." +} + +msg() { [[ "$QUIET_MODE" == false ]] && echo -e "$@"; } + +init_nft() { + nft add table inet "${TABLE_NAME}" 2>/dev/null + 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 "${TABLE_NAME}" postrouting { type nat hook postrouting priority 100 \; } 2>/dev/null + nft add chain inet "${TABLE_NAME}" forward { type filter hook forward priority 0 \; policy accept \; } 2>/dev/null +} + +get_total_packets() { + local uuid=$1 + local total=0 + local counts=$(nft list table inet "${TABLE_NAME}" 2>/dev/null | grep "$uuid" | grep -o 'packets [0-9]*' | awk '{print $2}') + for c in $counts; do total=$((total + c)); done + echo "$total" +} + +test_connection() { + local ip=$1 + local port=$2 + nc -z -v -w 1 "$ip" "$port" >/dev/null 2>&1 +} + +test_strict_handle() { + local h=$1 + local info=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "handle $h") + [[ -z "$info" ]] && { echo -e "Handle $h \e[31mNOT FOUND\e[0m"; return; } + + local lp=$(echo "$info" | grep -o 'dport [0-9]*' | awk '{print $2}') + local target=$(echo "$info" | grep -oE 'to ([0-9.]+|\[[0-9a-fA-F:]+\]):[0-9]+' | awk '{print $2}') + local tip=$(echo "$target" | cut -d':' -f1 | tr -d '[]') + local tp=$(echo "$target" | cut -d':' -f2) + local uuid=$(echo "$info" | grep -o 'ipf-id:[a-z0-9-]*') + local short_id=$(echo "$uuid" | cut -d':' -f2 | cut -c1-8) + + echo -n "Testing handle $h (Local :$lp -> Target $tip:$tp) [${short_id}]... " + local count_before=$(get_total_packets "$uuid") + + if test_connection "$tip" "$tp"; then + nc -z -v -w 1 127.0.0.1 "$lp" >/dev/null 2>&1 + sleep 0.1 + local count_after=$(get_total_packets "$uuid") + if (( count_after > count_before )); then + echo -e "\e[32mPASSED (Rule active & Target UP)\e[0m" + else + echo -e "\e[33mSKIPPED (Target UP, but blocked by prior rule)\e[0m" + fi + else + nc -z -v -w 1 127.0.0.1 "$lp" >/dev/null 2>&1 + sleep 0.1 + local count_after=$(get_total_packets "$uuid") + if (( count_after > count_before )); then + echo -e "\e[33mOFFLINE (Rule matched, but Target Down)\e[0m" + else + echo -e "\e[31mFAILED (Target Down & Rule blocked)\e[0m" + fi + fi +} + +list_rules() { + [[ "$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 2>/dev/null | 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" "${full_uuid:0:8}" + else + printf " %-9s %-6s %-20s %-20s %-10s\n" "$handle" "$proto" ":$lport" "$target" "${full_uuid:0:8}" + fi + done +} + +all_clear() { + if [[ "$FORCE_FLAG" == false ]]; then + echo -e "\e[33mWarning: This will delete ALL forwarding rules.\e[0m" + read -p "Are you sure? (y/N): " confirm + [[ ! "$confirm" =~ ^[yY]$ ]] && exit 0 + fi + nft delete table inet "${TABLE_NAME}" 2>/dev/null + init_nft; msg "All rules cleared successfully."; list_rules; exit 0 +} + +# --- 2. Flag Pre-processing --- + +for arg in "$@"; do + [[ "$arg" =~ q ]] && QUIET_MODE=true && FORCE_FLAG=true && SKIP_TEST=true + [[ "$arg" =~ f ]] && FORCE_FLAG=true && SKIP_TEST=true + [[ "$arg" == "-R" ]] && RESET_MODE=true + [[ "$arg" == "--version" ]] && { echo "ipfn version ${VERSION}"; exit 0; } +done + +if [[ "$RESET_MODE" == true ]]; then all_clear; fi +if [[ $# -eq 0 ]]; then list_rules; exit 0; fi + +# --- 3. Main Loop --- + +while [[ $# -gt 0 ]]; do + case "$1" in + -h|--help) show_help; exit 0 ;; + -L|-l) list_rules; exit 0 ;; + -*[d]*) + h_str=$(echo "$1" | sed -E 's/^-q?d?f?//') + [[ -z "$h_str" ]] && { h_str="$2"; shift; } + if [[ "$h_str" == "all" || "$h_str" == "*" ]]; then all_clear; fi + handles=() + IFS=',' read -r -a parts <<< "$h_str" + for part in "${parts[@]}"; do + if [[ "$part" =~ ^:([0-9]+)$ ]]; then + p="${BASH_REMATCH[1]}" + 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 + else handles+=("$part"); fi + done + for h in "${handles[@]}"; do + uuid=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "handle $h" | grep -o 'ipf-id:[a-z0-9-]*') + [[ -z "$uuid" ]] && continue + for c in prerouting output forward postrouting; do + nft -a list chain inet "${TABLE_NAME}" "$c" 2>/dev/null | grep "$uuid" | grep -o 'handle [0-9]*' | awk '{print $2}' | while read -r rh; do + nft delete rule inet "${TABLE_NAME}" "$c" handle "$rh" + done + done + msg "Deleted handle $h" + done + list_rules; exit 0 ;; + -t*) + h_str="${1#-t}"; [[ -z "$h_str" && -n "$2" ]] && { h_str="$2"; shift; } + if [[ "$h_str" =~ ^([0-9]+):([0-9\.]+):([0-9]+)$ ]]; then + lp=${BASH_REMATCH[1]}; tip=${BASH_REMATCH[2]}; tp=${BASH_REMATCH[3]} + echo -n "Checking Target $tip:$tp... " + test_connection "$tip" "$tp" && echo -e "\e[32mUP\e[0m" || echo -e "\e[31mDOWN\e[0m" + echo -n "Checking Local :$lp... " + nc -z -v -w 1 127.0.0.1 "$lp" >/dev/null 2>&1 && echo -e "\e[32mOPEN\e[0m" || echo -e "\e[31mCLOSED\e[0m" + elif [[ "$h_str" =~ ^([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+):([0-9]+)$ ]]; then + tip=${BASH_REMATCH[1]}; tp=${BASH_REMATCH[2]} + echo -n "Checking Target $tip:$tp... " + test_connection "$tip" "$tp" && echo -e "\e[32mUP\e[0m" || echo -e "\e[31mDOWN\e[0m" + elif [[ "$h_str" =~ ^:([0-9]+)$ || "$h_str" =~ ^([0-9]+):$ ]]; then + p="${BASH_REMATCH[1]}${BASH_REMATCH[2]}" + echo -n "Checking Local :$p... " + nc -z -v -w 1 127.0.0.1 "$p" >/dev/null 2>&1 && echo -e "\e[32mOK\e[0m" || echo -e "\e[31mOFFLINE\e[0m" + elif [[ "$h_str" =~ ^[0-9]+$ ]]; then + test_strict_handle "$h_str" + else + top_h=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "dnat" | head -n 1 | grep -o 'handle [0-9]*' | awk '{print $2}') + [[ -n "$top_h" ]] && test_strict_handle "$top_h" || msg "Error: No rules to test." + fi + exit 0 ;; + [0-9]*) + init_nft; raw="$1" + if [[ "$raw" =~ ^([0-9]+):([0-9\.]+):([0-9]+)$ ]]; then lp=${BASH_REMATCH[1]}; tip=${BASH_REMATCH[2]}; tp=${BASH_REMATCH[3]} + elif [[ "$raw" =~ ^([0-9]+):([0-9]+)$ ]]; then lp=${BASH_REMATCH[1]}; tip="127.0.0.1"; tp=${BASH_REMATCH[2]} + elif [[ "$raw" =~ ^([0-9]+)$ ]]; then lp=${BASH_REMATCH[1]}; tip="127.0.0.1"; tp=${BASH_REMATCH[1]} + fi + u_raw=$(cat /proc/sys/kernel/random/uuid); u="ipf-id:$u_raw"; fam="ip"; [[ "$tip" =~ : ]] && fam="ip6" + nft insert rule inet "${TABLE_NAME}" prerouting "$PROTO" dport "$lp" counter dnat $fam to "$tip:$tp" comment "\"$u\"" + nft insert rule inet "${TABLE_NAME}" output "$PROTO" dport "$lp" counter dnat $fam to "$tip:$tp" comment "\"$u\"" + nft insert rule inet "${TABLE_NAME}" forward $fam daddr "$tip" "$PROTO" dport "$tp" ct state new,established,related accept comment "\"$u\"" + nft insert rule inet "${TABLE_NAME}" forward $fam saddr "$tip" "$PROTO" sport "$tp" ct state established,related accept comment "\"$u\"" + nft insert rule inet "${TABLE_NAME}" forward iifname "lo" accept comment "\"$u\"" + nft insert rule inet "${TABLE_NAME}" postrouting $fam daddr "$tip" "$PROTO" dport "$tp" masquerade comment "\"$u\"" + list_rules "$u_raw" + if [[ "$SKIP_TEST" == false ]]; then + new_h=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "$u_raw" | grep -o 'handle [0-9]*' | awk '{print $2}') + echo ""; test_strict_handle "$new_h" + fi + exit 0 ;; + *) msg "Error: Unknown option '$1'"; exit 1 ;; + esac + shift +done