qwen2.5-coder:14bに指摘され修正
This commit is contained in:
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1 changed files with 143 additions and 138 deletions
281
ipf
281
ipf
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@ -1,74 +1,115 @@
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#!/bin/bash
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# Name: ipf
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# Version: 1.5.9
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# Version: 1.6.1
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# Date: 2026-01-22
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# Description: Full feature set. Includes conflict prevention, fixed -t parsing, and -f logic.
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# Description: Fully-featured nftables wrapper.
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# Refinement: Incorporated Qwen2.5-Coder's feedback with human-readable robustness.
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# Root check
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# -----------------------------------------------------------------------------
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# 1. Root & Environment Check
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# -----------------------------------------------------------------------------
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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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# Global Variables
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# Global Configurations
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TABLE_NAME="ipf"
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VERSION="1.5.9"
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VERSION="1.6.1"
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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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RESET_MODE=false
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# --- 1. Core Functions ---
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# -----------------------------------------------------------------------------
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# 2. Messaging & System Functions
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# -----------------------------------------------------------------------------
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msg() {
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[[ "$QUIET_MODE" == false ]] && echo -e "$@"
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}
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err() {
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# Even in quiet mode, critical errors should be visible but without color codes if requested
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if [[ "$QUIET_MODE" == false ]]; then
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echo -e "\e[31m$@\e[0m" >&2
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else
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echo "$@" >&2
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fi
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}
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enable_forwarding() {
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msg "\e[34m[System]\e[0m Enabling IP forwarding and localnet routing..."
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sysctl -w net.ipv4.ip_forward=1 >/dev/null
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# Enable route_localnet for all interfaces to allow forwarding to 127.0.0.1
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msg "\e[34m[System]\e[0m Enabling IP forwarding..."
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# Qwen's point: Check sysctl success
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if ! sysctl -w net.ipv4.ip_forward=1 >/dev/null 2>&1; then
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err "Critical: Could not enable net.ipv4.ip_forward. Please check your system permissions."
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fi
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# Enable route_localnet for all interfaces (essential for DNAT to 127.0.0.1)
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for dev in /proc/sys/net/ipv4/conf/*/route_localnet; do
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echo 1 > "$dev" 2>/dev/null
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if [[ -f "$dev" ]]; then
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echo 1 > "$dev" 2>/dev/null
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fi
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done
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}
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init_nft() {
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# Create table if it doesn't exist
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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 "${TABLE_NAME}" forward { type filter hook forward priority 0 \; policy accept \; } 2>/dev/null
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# Qwen's point: Reliable chain initialization
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# Prerouting (NAT)
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nft add chain inet "${TABLE_NAME}" prerouting "{ type nat hook prerouting priority -100 ; policy accept ; }" 2>/dev/null
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# Output (NAT for local traffic)
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nft add chain inet "${TABLE_NAME}" output "{ type nat hook output priority -100 ; policy accept ; }" 2>/dev/null
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# Postrouting (Masquerade)
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nft add chain inet "${TABLE_NAME}" postrouting "{ type nat hook postrouting priority 100 ; policy accept ; }" 2>/dev/null
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# Forward (Filter)
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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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# -----------------------------------------------------------------------------
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# 3. Data & Packet Processing
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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 $counts; do
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total=$((total + c))
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done
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# Optimized: One-pass sum of packets for all rules with this UUID
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# We use awk to ensure we always return a number, even if no rules match.
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local total=$(nft list table inet "${TABLE_NAME}" 2>/dev/null | grep "$uuid" | grep -o 'packets [0-9]*' | awk '{sum+=$2} END {print sum+0}')
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echo "$total"
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}
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test_connection() {
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# Crucial: Argument order for nc (options first, then target)
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nc -z -w 1 "$1" "$2" >/dev/null 2>&1
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local target_ip=$1
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local target_port=$2
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# Ensure standard NC argument order: [options] [host] [port]
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nc -z -w 1 "$target_ip" "$target_port" >/dev/null 2>&1
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return $?
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}
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# -----------------------------------------------------------------------------
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# 4. Rule Management Functions
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# -----------------------------------------------------------------------------
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delete_by_handle() {
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local h=$1
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# Find UUID associated with this handle
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local uuid=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "handle $h" | grep -o 'ipf-id:[a-z0-9-]*')
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local uuid=""
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# Qwen's point: Search UUID across ALL chains, not just prerouting
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local search_chains=("prerouting" "output" "forward" "postrouting")
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for sc in "${search_chains[@]}"; do
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uuid=$(nft -a list chain inet "${TABLE_NAME}" "$sc" 2>/dev/null | grep "handle $h" | grep -o 'ipf-id:[a-z0-9-]*' | head -n 1)
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[[ -n "$uuid" ]] && break
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done
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if [[ -z "$uuid" ]]; then
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return 1
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fi
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# Delete rules in all chains that share this UUID
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local chains=("prerouting" "output" "forward" "postrouting")
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for c in "${chains[@]}"; do
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# Delete all rules associated with this UUID in all relevant chains
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for c in "${search_chains[@]}"; do
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nft -a list chain inet "${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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@ -81,7 +122,7 @@ test_strict_handle() {
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local info=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "handle $h")
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if [[ -z "$info" ]]; then
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echo -e "Handle $h \e[31mNOT FOUND\e[0m"
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err "Handle $h not found in table '${TABLE_NAME}'"
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return
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fi
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@ -96,17 +137,17 @@ test_strict_handle() {
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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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# Actual trigger test via localhost
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# Try to trigger the rule via localhost
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nc -z -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 "$uuid")
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if (( count_after > count_before )); then
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echo -e "\e[32mPASSED\e[0m"
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else
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echo -e "\e[33mSKIPPED (Check other rules)\e[0m"
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echo -e "\e[33mSKIPPED (Traffic not hitting rule)\e[0m"
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fi
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else
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echo -e "\e[31mOFFLINE (Target Down)\e[0m"
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echo -e "\e[31mOFFLINE (Target Unreachable)\e[0m"
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fi
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}
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@ -114,7 +155,8 @@ list_rules() {
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[[ "$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 (ipf):"
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msg "Forwarding Rules (Table: ${TABLE_NAME}):"
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printf "%-10s %-6s %-20s %-20s %-10s\n" "HANDLE" "PROTO" "LOCAL" "TARGET" "UUID"
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echo "-----------------------------------------------------------------------------------"
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@ -138,7 +180,7 @@ add_rule() {
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init_nft
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[[ "$FORCE_FLAG" == true ]] && enable_forwarding
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# Parsing
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# Syntax Parsing (LPORT:TIP:TPORT / LPORT:TPORT / LPORT)
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if [[ "$raw" =~ ^([0-9]+):([0-9\.]+):([0-9]+)$ ]]; then
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lp=${BASH_REMATCH[1]}; tip=${BASH_REMATCH[2]}; tp=${BASH_REMATCH[3]}
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elif [[ "$raw" =~ ^([0-9]+):([0-9]+)$ ]]; then
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@ -146,73 +188,64 @@ add_rule() {
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elif [[ "$raw" =~ ^([0-9]+)$ ]]; 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 '$raw'\e[0m"
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err "Error: Invalid rule format '$raw'"
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return 1
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fi
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# --- Conflict Management ---
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# Delete any existing rules using the same local port to prevent shadowing
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local existing_h=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "dport $lp" | grep -o 'handle [0-9]*' | awk '{print $2}')
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for eh in $existing_h; do
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# Find and overwrite existing rules for the same local port
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local existing_rules=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "dport $lp" | grep -o 'handle [0-9]*' | awk '{print $2}')
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for eh in $existing_rules; do
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msg "\e[33mOverwriting existing rule on port :$lp (Handle $eh)...\e[0m"
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delete_by_handle "$eh"
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done
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# UUID Generation
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# Generate Unique ID for the rule set
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local u_raw=$(cat /proc/sys/kernel/random/uuid)
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local u="ipf-id:$u_raw"
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local fam="ip"
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[[ "$tip" =~ : ]] && fam="ip6"
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# Rule Insertion (using insert to stay at the top)
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# 1. PREROUTING: Redirect incoming external packets
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nft insert rule inet "${TABLE_NAME}" prerouting "$PROTO" dport "$lp" counter dnat $fam to "$tip:$tp" comment "\"$u\""
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# 2. OUTPUT: Redirect locally generated packets
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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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# 3. FORWARD: Allow traffic to the target
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nft insert rule inet "${TABLE_NAME}" forward $fam daddr "$tip" "$PROTO" dport "$tp" ct state new,established,related accept comment "\"$u\""
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# 4. FORWARD: Allow return traffic from the target
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nft insert rule inet "${TABLE_NAME}" forward $fam saddr "$tip" "$PROTO" sport "$tp" ct state established,related accept comment "\"$u\""
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# 5. FORWARD: Loopback interface allowance
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nft insert rule inet "${TABLE_NAME}" forward iifname "lo" accept comment "\"$u\""
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# 6. POSTROUTING: Source NAT to ensure target sees local IP
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nft insert rule inet "${TABLE_NAME}" postrouting $fam daddr "$tip" "$PROTO" dport "$tp" masquerade comment "\"$u\""
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list_rules "$u_raw"
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# Auto-test unless forced
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if [[ "$SKIP_TEST" == false && "$FORCE_FLAG" == false ]]; then
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local new_h=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "$u_raw" | grep -o 'handle [0-9]*' | awk '{print $2}')
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local nh=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "$u_raw" | grep -o 'handle [0-9]*' | awk '{print $2}')
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echo ""
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test_strict_handle "$new_h"
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test_strict_handle "$nh"
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fi
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}
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all_clear() {
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if [[ "$FORCE_FLAG" == false ]]; then
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echo -e "\e[33mWarning: This will delete ALL ipf rules.\e[0m"
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read -p "Are you sure? (y/N): " confirm
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echo -e "\e[33mWarning: This will delete ALL rules in table '${TABLE_NAME}'.\e[0m"
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read -p "Confirm removal? (y/N): " confirm
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[[ ! "$confirm" =~ ^[yY]$ ]] && exit 0
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fi
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nft delete table inet "${TABLE_NAME}" 2>/dev/null
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init_nft
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msg "All ipf rules cleared."
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msg "Table '${TABLE_NAME}' has been reset."
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list_rules
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exit 0
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}
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show_help() {
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echo "ipf version ${VERSION}"
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echo "Usage: ipf [OPTIONS] [RULE]"
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echo ""
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echo "Options:"
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echo " -f Kernel: Enable forwarding & route_localnet"
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echo " Global: Acts as 'Force' (Skips confirmation & tests)"
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echo " -l, -L List all forwarding rules"
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echo " -d HANDLE/:PORT/all Delete rule (Add -f to skip confirmation)"
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echo " -R Reset: Clear ALL rules (Add -f to skip confirmation)"
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echo " -t [TARGET] Test connectivity (Handle, :Port, or IP:Port)"
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echo " -y Same as -f (Force/Yes)"
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echo " -q Quiet mode (implies -f)"
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echo " -v, --version Show version"
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echo " -h, --help Show this help message"
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}
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# --- 2. Flag Pre-processing ---
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# -----------------------------------------------------------------------------
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# 5. Argument Parsing (Main Loop)
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# -----------------------------------------------------------------------------
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# Pre-parse flags for Global behavior
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for arg in "$@"; do
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if [[ "$arg" =~ q ]]; then QUIET_MODE=true; FORCE_FLAG=true; SKIP_TEST=true; fi
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if [[ "$arg" =~ f ]]; then FORCE_FLAG=true; SKIP_TEST=true; fi
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@ -223,98 +256,70 @@ 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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-v|--version) echo "ipf version ${VERSION}"; exit 0 ;;
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-f|-y|-q)
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-h|--help)
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echo "ipf version ${VERSION}"
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echo "Usage: ipf [OPTIONS] [RULE]"
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echo "Example: ipf 80:192.168.1.10:8080"
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exit 0 ;;
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-v|--version)
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echo "ipf version ${VERSION}"; exit 0 ;;
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-l|-L)
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list_rules; exit 0 ;;
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-f|-y|-q)
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[[ "$1" == "-f" ]] && enable_forwarding
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shift
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[[ $# -eq 0 ]] && exit 0
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continue
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;;
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shift; [[ $# -eq 0 ]] && exit 0; continue ;;
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-*[d]*)
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# Handle combined flags like -fd or -qd
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h_str=$(echo "$1" | sed -E 's/^-q?d?f?y?//')
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if [[ -z "$h_str" ]]; then
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h_str="$2"
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shift
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fi
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# Support combined flags and comma-separated handles
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target="${1#-d}"
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[[ -z "$target" ]] && { target="$2"; shift; }
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[[ "$target" == "all" ]] && all_clear
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if [[ "$h_str" == "all" || "$h_str" == "*" ]]; then
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all_clear
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fi
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# Collect handles to delete
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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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# Find all handles for this local port
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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 $2}'); do
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handles+=("$h")
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IFS=',' read -r -a parts <<< "$target"
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for p in "${parts[@]}"; do
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if [[ "$p" =~ ^:([0-9]+)$ ]]; then
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# Delete by local port
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port="${BASH_REMATCH[1]}"
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for h in $(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "dport $port" | grep -o 'handle [0-9]*' | awk '{print $2}'); do
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delete_by_handle "$h"
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done
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else
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handles+=("$part")
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# Delete by handle
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if ! delete_by_handle "$p"; then
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err "Error: Handle $p not found."
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fi
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fi
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done
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for h in "${handles[@]}"; do
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if delete_by_handle "$h"; then
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msg "Deleted handle $h"
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else
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msg "\e[31mError: Handle $h not found\e[0m"
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fi
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done
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list_rules
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exit 0
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;;
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list_rules; exit 0 ;;
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-t*)
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h_str="${1#-t}"
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if [[ -z "$h_str" ]]; then
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h_str="$2"
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shift
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fi
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# Support combined or separated test target
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target="${1#-t}"
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[[ -z "$target" ]] && { target="$2"; shift; }
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# Pattern matching for different test types
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if [[ "$h_str" =~ ^([0-9\.]+):([0-9]+)$ ]]; then
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# IP:PORT test
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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 [[ "$h_str" =~ ^:([0-9]+)$ ]]; then
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# :PORT test (local)
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p="${BASH_REMATCH[1]}"
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echo -n "Checking Local :$p... "
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nc -z -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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# Handle test
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test_strict_handle "$h_str"
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if [[ "$target" =~ ^([0-9\.]+):([0-9]+)$ ]]; then
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# External Target IP:PORT test
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ip=${BASH_REMATCH[1]}; port=${BASH_REMATCH[2]}
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echo -n "Checking Target $ip:$port... "
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test_connection "$ip" "$port" && echo -e "\e[32mUP\e[0m" || echo -e "\e[31mDOWN\e[0m"
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elif [[ "$target" =~ ^:([0-9]+)$ ]]; then
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# Local port test
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port="${BASH_REMATCH[1]}"
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echo -n "Checking Local :$port... "
|
||||
nc -z -w 1 127.0.0.1 "$port" >/dev/null 2>&1 && echo -e "\e[32mOK\e[0m" || echo -e "\e[31mOFFLINE\e[0m"
|
||||
elif [[ "$target" =~ ^[0-9]+$ ]]; then
|
||||
# Internal rule test by handle
|
||||
test_strict_handle "$target"
|
||||
else
|
||||
# Default: test the first rule found
|
||||
# Default to testing first available rule
|
||||
top_h=$(nft -a list chain inet "${TABLE_NAME}" prerouting 2>/dev/null | grep "dnat" | head -n 1 | grep -o 'handle [0-9]*' | awk '{print $2}')
|
||||
if [[ -n "$top_h" ]]; then
|
||||
test_strict_handle "$top_h"
|
||||
else
|
||||
msg "\e[31mError: No valid test target found for '$h_str'\e[0m"
|
||||
fi
|
||||
[[ -n "$top_h" ]] && test_strict_handle "$top_h" || err "Error: No valid target to test."
|
||||
fi
|
||||
exit 0
|
||||
;;
|
||||
exit 0 ;;
|
||||
[0-9]*)
|
||||
# Positional argument as a rule
|
||||
add_rule "$1"
|
||||
exit 0
|
||||
;;
|
||||
add_rule "$1"; exit 0 ;;
|
||||
*)
|
||||
msg "\e[31mError: Unknown option '$1'\e[0m"
|
||||
show_help
|
||||
exit 1
|
||||
;;
|
||||
err "Unknown option '$1'. Use --help for usage."; exit 1 ;;
|
||||
esac
|
||||
shift
|
||||
done
|
||||
|
|
|
|||
Loading…
Reference in a new issue