c-ares

Daniel Stenberg ❘ Open Source

Overview of c-ares

c-ares is a C library that provides asynchronous capabilities for DNS resolution. Developed by Daniel Stenberg, who is also the creator of cURL, this library is focused on facilitating non-blocking DNS lookups. This feature is particularly beneficial for applications that must maintain high performance and require the ability to handle multiple tasks simultaneously without interruptions. The library enables developers to integrate DNS resolution into their applications seamlessly while managing other tasks concurrently.

Key Features

Asynchronous DNS Resolution: c-ares allows for non-blocking DNS queries, enabling applications to maintain responsiveness without waiting for network operations to complete.
Support for IPv4 and IPv6: The library supports both Internet Protocol versions, ensuring compatibility with modern networking standards.
Multiple Resolver Types: Offers various resolver types including both A and AAAA records, enhancing flexibility in handling different domain queries.
Built-in Parsing: Automatically parses returned DNS data, which simplifies the application development process by reducing the need for manual data handling.
Error Handling: Provides detailed error codes that aid developers in diagnosing issues related to DNS queries.
Cross-Platform Compatibility: Supports multiple operating systems including Windows, MacOS, and Linux environments, making it a versatile choice for developers worldwide.

Installation

The installation process for c-ares is straightforward. Users can choose to build from source or utilize package managers on their respective platforms. Here’s a quick guide on how to get started:

Clone the Repository: git clone https://github.com/c-ares/c-ares.git
Navigate to the Directory: cd c-ares
Build the Library: This can be done using CMake: cmake .
Compile and Install: make && sudo make install

Usage

C-ares provides a simple API that allows developers to initiate DNS lookups with minimal setup. Below is a basic example demonstrating how to use c-ares to resolve a hostname:

#include <ares.h>
#include <stdio.h>

void callback(void *data, int status, int timeouts, struct hostent *host) {
    if (status == ARES_SUCCESS) {
        printf("Resolved IP: %s\n", inet_ntoa(*(struct in_addr *)host->h_addr));
    } else {
        fprintf(stderr, "Error resolving: %d\n", status);
    }
}

int main() {
    ares_channel channel;
    ares_init(&channel);
    
    char *hostname = "www.example.com";
    struct ares_options options;
    options.sock_state = NULL;
    
    ares_gethostbyname(channel, hostname, AF_INET, callback, NULL);
    
    // Process events
    // (Include event loop code here to handle callbacks)
    
    ares_destroy(channel);
}

Performance

C-ares is designed for high efficiency in DNS resolution. Its non-blocking nature allows applications to handle numerous resolutions concurrently without being stalled by any one lookup. This performance-oriented architecture benefits applications like web browsers or servers where multiple hostname lookups are conducted in parallel.

Error Handling and Debugging

Error management within c-ares is robust. When an error occurs during a DNS query, the library returns specific error codes which developers can leverage for detailed diagnostics. The provided error management capabilities facilitate easier debugging and enhance the reliability of applications that utilize the library.

Documentation and Community Support

C-ares comes with comprehensive documentation that covers all aspects of its API along with examples illustrating its usage. The library has an active community contributing to its development through GitHub and mailing lists where users can seek assistance or share improvements.

The c-ares library stands out as a highly performant solution for asynchronous DNS resolution in C programming languages. Its extensive features and ease of use make it ideal for modern applications requiring efficient network operations. Developers looking for a reliable library that minimizes blocking operations while performing DNS queries will find c-ares invaluable.

概述

c-ares 是在由Daniel Stenberg开发类别 Development Open Source 软件。

最新版本是 c-ares 的目前未知。它最初被添加到我们的数据库 2009/10/16 上。

c-ares 在下列操作系统上运行: Windows。

c-ares 已不被评为由我们用户尚未。

下载尚未公布。请新增一个。

保持最新
与UpdateStar免费。

评测

	WPS Office WPS Office：满足您所有需求的多功能办公套件
	Adobe Photoshop 终极照片编辑软件：Adobe Photoshop 评论
	Adobe Flash Player NPAPI Adobe Flash Player NPAPI：多媒体网页浏览的必备软件
	Intel Driver & Support Assistant 轻松让您的英特尔系统保持最新状态
	Microsoft Visual Studio 2010 Tools for Office Runtime Language Pack 使用语言包增强 Microsoft Visual Studio 的功能
	Microsoft Visual Studio 2010 Tools for Office Runtime 使用 Microsoft Visual Studio 2010 运行时提升您的办公工具

最热门的下载

	UpdateStar Premium Edition UpdateStar Premium Edition：管理軟體更新的實用工具 UpdateStar Premium Edition 是一種軟體管理工具，旨在通過確保您的程式是最新的，説明您的 PC 保持最佳狀態。它可以處理從掃描過時軟體到提供個人化推薦，甚至備份您的配置以便在需要時恢復設置的所有事情。仔細查看自動更新功能：此功能會自動掃描您的電腦以查找過時的程式，只需按下即可説明您更新它們。無需再尋找每個應用程式的最新版本。軟體資料庫： UpdateStar …
	Microsoft Edge 发现增强的 Microsoft Edge 浏览器：您的终极 Web 导航工具 Microsoft Edge 仍然是顶级 Web 浏览器，在速度、安全性和与 Microsoft 生态系统的无缝集成之间实现了最佳平衡。它在 Chromium 引擎上重建，提供令人印象深刻的性能，同时保持时尚和用户友好的界面。 Microsoft Edge 的主要功能和优势高速性能：借助基于 Chromium 的引擎，体验快速的网页加载时间，使浏览更流畅、更高效。增强的安全性：使用 …
	Microsoft Visual C++ 2015 Redistributable Package Microsoft Visual C++ 2015 Redistributable Package 是 Microsoft 创建的軟體元件。它為使用者提供了運行使用 Visual Studio 2015 創建的應用程式所需的運行時元件。此可再發行元件組件組件旨在使開發人員能夠更輕鬆地在系統上部署其應用程式，而不必擔心是否已安裝所需的運行時元件。該包包括 Microsoft 基礎類（MFC）、Visual C++ CRT 和標準 C++ 等庫。如果沒有這些庫，使用 …
	Google Chrome Google Chrome 评论：快速、灵活且安全的网络浏览器 Google Chrome 是领先的网络浏览器之一，以其速度、简单性和丰富的功能集而闻名。Chrome 由 Google 开发，利用 Webkit（及其分支 Blink）等开源技术来提供高性能的 HTML 渲染，确保跨设备的无缝浏览体验。 Chrome 的创新用户界面采用简约设计，将标签页放置在窗口顶部，以最大限度地利用 Web 内容的屏幕空间。集成的多功能框结合了地址和搜索功能，可智能区分 URL …
	Microsoft Visual C++ 2010 Redistributable 評論：Microsoft Visual C++ 2010 Redistributable by Microsoft Microsoft Visual C++ 2010 Redistributable 是由 Microsoft 開發的軟體應用程式，它為使用 Microsoft Visual C++ 2010 構建的程式提供運行時元件。在未安裝 Visual C++ 2010 的電腦上執行使用此版本的 Visual …
	Microsoft Update Health Tools Microsoft Update Health Tools 是由 Microsoft Corporation 開發的軟體應用程式，可説明使用者解決和修復與設備上的 Windows Update 相關的問題。作為 Microsoft 對改善 Windows 更新體驗的持續承諾的一部分，更新運行狀況工具旨在簡化診斷和解決更新相關問題的過程。 Microsoft 更新運行狀況工具的一個關鍵功能是它能夠檢測可能阻止 Windows …