feat: TCP BBR one-click script

README.md

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+# TCP BBR 一键开启
+
+一键开启/关闭 TCP BBR 加速，支持交互菜单和命令行模式。
+
+## 一键安装
+
+```
+curl -sL https://cdn.jsdelivr.net/gh/xmg0828888/tcp-bbr@main/bbr.sh -o bbr.sh && chmod +x bbr.sh && ./bbr.sh
+```
+
+## 命令行模式
+
+```bash
+./bbr.sh enable   # 开启 BBR
+./bbr.sh disable  # 关闭 BBR
+./bbr.sh status   # 查看状态
+./bbr.sh          # 交互菜单
+```
+
+## 要求
+
+- Linux 4.9+ 内核
+- root 权限

bbr.sh

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+#!/bin/bash
+# TCP BBR 一键开启脚本
+# https://github.com/xmg0828888/tcp-bbr
+
+RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[0;33m'; NC='\033[0m'
+
+check_root() { [ "$(id -u)" != "0" ] && echo -e "${RED}请使用 root 运行${NC}" && exit 1; }
+check_os() { [ ! -f /etc/os-release ] && echo -e "${RED}不支持的系统${NC}" && exit 1; }
+
+show_status() {
+    echo -e "\n${GREEN}=== TCP BBR 状态 ===${NC}"
+    local algo=$(sysctl -n net.ipv4.tcp_congestion_control 2>/dev/null)
+    local qdisc=$(sysctl -n net.core.default_qdisc 2>/dev/null)
+    local bbr_mod=$(lsmod | grep -c bbr)
+    echo -e "拥塞算法: ${YELLOW}${algo}${NC}"
+    echo -e "队列调度: ${YELLOW}${qdisc}${NC}"
+    if [ "$algo" = "bbr" ] && [ "$bbr_mod" -gt 0 ]; then
+        echo -e "BBR 状态: ${GREEN}✓ 已开启${NC}"
+    else
+        echo -e "BBR 状态: ${RED}✗ 未开启${NC}"
+    fi
+    echo ""
+}
+
+enable_bbr() {
+    echo -e "${GREEN}正在开启 BBR...${NC}"
+    
+    # 写入 sysctl 配置
+    sed -i '/net.core.default_qdisc/d' /etc/sysctl.conf
+    sed -i '/net.ipv4.tcp_congestion_control/d' /etc/sysctl.conf
+    echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
+    echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
+    
+    sysctl -p >/dev/null 2>&1
+    
+    # 验证
+    local algo=$(sysctl -n net.ipv4.tcp_congestion_control 2>/dev/null)
+    if [ "$algo" = "bbr" ]; then
+        echo -e "${GREEN}✓ BBR 开启成功！${NC}"
+    else
+        echo -e "${RED}✗ BBR 开启失败，内核可能不支持${NC}"
+        echo -e "当前内核: $(uname -r)"
+        echo -e "BBR 需要 Linux 4.9+ 内核"
+    fi
+}
+
+disable_bbr() {
+    echo -e "${YELLOW}正在关闭 BBR...${NC}"
+    sed -i '/net.core.default_qdisc/d' /etc/sysctl.conf
+    sed -i '/net.ipv4.tcp_congestion_control/d' /etc/sysctl.conf
+    echo "net.core.default_qdisc=pfifo_fast" >> /etc/sysctl.conf
+    echo "net.ipv4.tcp_congestion_control=cubic" >> /etc/sysctl.conf
+    sysctl -p >/dev/null 2>&1
+    echo -e "${GREEN}✓ 已恢复为 cubic${NC}"
+}
+
+show_menu() {
+    clear
+    echo -e "${GREEN}================================${NC}"
+    echo -e "${GREEN}    TCP BBR 一键管理脚本${NC}"
+    echo -e "${GREEN}================================${NC}"
+    show_status
+    echo "1. 开启 BBR"
+    echo "2. 关闭 BBR"
+    echo "3. 查看状态"
+    echo "0. 退出"
+    echo ""
+    read -p "请选择 [0-3]: " choice
+    case "$choice" in
+        1) enable_bbr; show_status ;;
+        2) disable_bbr; show_status ;;
+        3) show_status ;;
+        0) exit 0 ;;
+        *) echo -e "${RED}无效选择${NC}" ;;
+    esac
+    read -p "按回车继续..." && show_menu
+}
+
+check_root
+check_os
+
+case "${1:-}" in
+    enable)  enable_bbr; show_status ;;
+    disable) disable_bbr; show_status ;;
+    status)  show_status ;;
+    *)       show_menu ;;
+esac