René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Localhost DNS lookup fails without network connection","articleBody":"Hi! Thanks again for the lib!\r\n\r\nI mostly use this library on windows to connect to a local server via \"wss://localhost\". This normally works fine, but when **not** connected to a network (network cable unplugged and not connected to wifi), IXWebsockets fails to connect to my server.\r\n\r\nI tracked it down to failing DNS lookup of localhost. Digging into the code, I see `getaddrinfo` is configured not to do lookups when a with only a loopback address available (hint `AI_ADDRCONFIG` is set): https://github.com/machinezone/IXWebSocket/blob/9884c325dd0fa64b2b885b332e98118f60313208/ixwebsocket/IXDNSLookup.cpp#L64\r\n\r\nAs a workaround I tested to remove that flag and my program started working as expected.\r\n\r\nI'm not proficient in winsock etc, so I can't tell if there any specific reason for the flag to be set for the library or can it be removed or made configurable?\r\n\r\nThanks!","author":{"url":"https://github.com/MichelJansson","@type":"Person","name":"MichelJansson"},"datePublished":"2024-08-26T15:45:23.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/524/IXWebSocket/issues/524"}