Question 1

How to compile c-ares on Windows with Visual Studio?

Accepted Answer

Check the INSTALL.md file for build instructions; typically, use CMake or provided Visual Studio project files. The README links to detailed setup, but you may need to configure paths and dependencies manually.

Question 2

c-ares vs getaddrinfo: which is better for async DNS?

Accepted Answer

c-ares excels in asynchronous, non-blocking queries and parallel resolution, while getaddrinfo is often blocking and system-dependent. Use c-ares for performance-critical apps; getaddrinfo is simpler for basic sync lookups.

Question 3

Does c-ares support DNS over TLS?

Accepted Answer

The README doesn't list DNS over TLS (DoT) support in its RFCs; it focuses on traditional DNS protocols. For encrypted DNS, you might need to implement it externally or use a different library.

Question 4

Is c-ares thread-safe for multi-threaded applications?

Accepted Answer

Yes, c-ares is designed for asynchronous operation and can be used in multi-threaded contexts, but proper initialization and callback handling are required; refer to the API documentation for thread-safety guidelines.

Question 5

How to handle DNS query failures with c-ares callbacks?

Accepted Answer

Use the async callback functions provided by c-ares to check status codes and error messages; the library includes detailed error reporting, but you need to implement retry logic and fallbacks in your application code.

Question 6

Can c-ares be used in embedded Linux systems with limited resources?

Accepted Answer

Yes, c-ares is cross-platform and efficient, but for extremely memory-constrained systems, profile its usage; alternatives like lightweight resolvers might be better if async features aren't needed.

c-ares

What is c-ares?

Overview

Use Cases

Best For

Related Projects

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions