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71 lines
2.8 KiB
71 lines
2.8 KiB
/*
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Copyright (c) 2021 Sogou, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Authors: Liu Kai (liukaidx@sogou-inc.com)
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*/
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#ifndef _WFDNSSERVER_H_
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#define _WFDNSSERVER_H_
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#include "DnsMessage.h" // 引入 DNS 消息相关的头文件
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#include "WFServer.h" // 引入服务器功能的头文件
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#include "WFTaskFactory.h" // 引入任务工厂以创建 DNS 任务
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// 定义一个 dns_process_t 类型，它是一个接受 WFDnsTask 指针并返回 void 的函数对象
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using dns_process_t = std::function<void (WFDnsTask *)>;
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// 定义 WFDnsServer 类型，基于 WFServer 模板类，使用 DnsRequest 和 DnsResponse 作为协议
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using WFDnsServer = WFServer<protocol::DnsRequest, protocol::DnsResponse>;
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// 设置 DNS 服务器的默认参数
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static constexpr struct WFServerParams DNS_SERVER_PARAMS_DEFAULT =
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{
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.transport_type = TT_UDP, // 传输类型为 UDP
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.max_connections = 2000, // 最大连接数
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.peer_response_timeout = 10 * 1000, // 对端响应超时时间
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.receive_timeout = -1, // 接收超时时间，-1 表示不超时
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.keep_alive_timeout = 300 * 1000, // 保持连接的超时时间
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.request_size_limit = (size_t)-1, // 请求大小限制，-1 表示无限制
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.ssl_accept_timeout = 5000, // SSL 接受超时时间
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};
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// WFDnsServer 构造函数的特化模板
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template<> inline
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WFDnsServer::WFServer(dns_process_t proc) :
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WFServerBase(&DNS_SERVER_PARAMS_DEFAULT), // 调用基类构造函数，传入默认参数
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process(std::move(proc)) // 移动构造函数以提高性能
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{
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}
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// 创建新的会话，重写基类方法
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template<> inline
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CommSession *WFDnsServer::new_session(long long seq, CommConnection *conn)
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{
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WFDnsTask *task;
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// 使用任务工厂创建一个新的 DNS 任务
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task = WFServerTaskFactory::create_dns_task(this, this->process);
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// 设置保持连接的超时时间
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task->set_keep_alive(this->params.keep_alive_timeout);
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// 设置接收超时时间
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task->set_receive_timeout(this->params.receive_timeout);
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// 设置请求大小限制
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task->get_req()->set_size_limit(this->params.request_size_limit);
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return task; // 返回创建的任务
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}
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#endif // _WFDNSSERVER_H_
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