Add clashctl and auto port selection

scripts/port_utils.sh

@@ -0,0 +1,102 @@
+#!/bin/bash
+
+PORT_CHECK_WARNED=${PORT_CHECK_WARNED:-0}
+
+is_port_in_use() {
+	local port="$1"
+	if command -v ss >/dev/null 2>&1; then
+		ss -lnt | awk '{print $4}' | grep -E "(:|\.)${port}$" >/dev/null 2>&1
+		return $?
+	fi
+	if command -v netstat >/dev/null 2>&1; then
+		netstat -lnt | awk '{print $4}' | grep -E "(:|\.)${port}$" >/dev/null 2>&1
+		return $?
+	fi
+	if command -v lsof >/dev/null 2>&1; then
+		lsof -iTCP -sTCP:LISTEN -P -n | awk '{print $9}' | grep -E "(:|\.)${port}$" >/dev/null 2>&1
+		return $?
+	fi
+	if [ "$PORT_CHECK_WARNED" -eq 0 ]; then
+		echo -e "\033[33m[WARN] 未找到端口检测工具，端口冲突检测可能不准确\033[0m" >&2
+		PORT_CHECK_WARNED=1
+	fi
+	return 1
+}
+
+find_available_port() {
+	local start_port=${1:-20000}
+	local end_port=${2:-65000}
+	local port
+
+	if command -v shuf >/dev/null 2>&1; then
+		for _ in {1..50}; do
+			port=$(shuf -i "${start_port}-${end_port}" -n 1)
+			if ! is_port_in_use "$port"; then
+				echo "$port"
+				return 0
+			fi
+		done
+	fi
+
+	for port in $(seq "$start_port" "$end_port"); do
+		if ! is_port_in_use "$port"; then
+			echo "$port"
+			return 0
+		fi
+	done
+
+	return 1
+}
+
+resolve_port_value() {
+	local name="$1"
+	local value="$2"
+	local resolved
+
+	if [ -z "$value" ] || [ "$value" = "auto" ]; then
+		resolved=$(find_available_port)
+		if [ -z "$resolved" ]; then
+			return 1
+		fi
+		echo -e "\033[33m[WARN] ${name} 端口已自动分配为 ${resolved}\033[0m" >&2
+		echo "$resolved"
+		return 0
+	fi
+
+	if [[ "$value" =~ ^[0-9]+$ ]]; then
+		if is_port_in_use "$value"; then
+			resolved=$(find_available_port)
+			if [ -n "$resolved" ]; then
+				echo -e "\033[33m[WARN] ${name} 端口 ${value} 已被占用，已自动切换为 ${resolved}\033[0m" >&2
+				echo "$resolved"
+				return 0
+			fi
+		fi
+	fi
+
+	echo "$value"
+}
+
+resolve_host_port() {
+	local name="$1"
+	local raw="$2"
+	local default_host="$3"
+	local host
+	local port
+
+	if [ "$raw" = "auto" ] || [ -z "$raw" ]; then
+		host="$default_host"
+		port="auto"
+	else
+		if [[ "$raw" == *:* ]]; then
+			host="${raw%:*}"
+			port="${raw##*:}"
+		else
+			host="$default_host"
+			port="$raw"
+		fi
+	fi
+
+	port=$(resolve_port_value "$name" "$port") || return 1
+	echo "${host}:${port}"
+}