Feature #20018: Get the error codes as Socket::EAI_XXX when getaddrinfo and getnameinfo fail

• Status: Closed
• Assignee: -
• Target version: -

[shioimm (Misaki Shioi)]

Feature for implementing Happy Eyeballs version 2 (RFC 8305) in Socket.tcp.

Probrem

I would like to implement Happy Eyeballs version 2 (RFC 8305) in Socket.tcp.
In HEv2, EAI_ADDRFAMILY and EAI_AGAIN should be ignored when getaddrinfoo returns them in hostname resolution. However, there is currently no way to ask SocketError for errors returned by getaddrinfo

Proposal

I opened a PR to get errors when getaddrinfo and getnameinfo returns them.

https://github.com/ruby/ruby/pull/9018

Todo this,

• I added Socket::ResolutionError as a subclass of SocketError
• I added an attribute of Socket::ResolutionError to get error code via `#error_code
• I replaced SocketError (rb_eSocket) with Socket::ResolutionError (rb_eResolutionError) in rsock_raise_socket_errorbecause this function is only called whengetaddrinfoandgetnameinfo` fail
• I renamed rsock_raise_socket_error to rock_raise_resolution_error for the same reason

In addition, Socket::ResolutionError is a subclass of SocketError, so it does not affect rescue SocketError in source codes.

[mame (Yusuke Endoh)]

• Status changed from Open to Closed

https://github.com/ruby/ruby/pull/9018 was merged. Closing.