René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Incorrect returns caused by improper address filter in socket.getfqdn","articleBody":"# Bug report\r\n\r\nWhen getfqdn called with name \"::\", instead of returning gethostname(), it will call gethostbyaddr(\"::\").\r\nThis will raise an exception \"socket.herror: [Errno 1] Unknown host\", which will cause a 30 seconds(timeout) delay and return incorrect result. (Tested only on macOS Ventura 13.0.0.1, Python 3.10.6)\r\nThe solution is to add a filter to the first if statement, in line 792 socket.py, which will be included in my further pull-request.\r\n\r\n```python\r\nimport socket\r\nsocket.getfqdn(\"::\") # This will block 30 seconds and returns \"::\" instead of hostname\r\n```\r\n\r\n# Your environment\r\n\r\n- CPython versions tested on: Python 3.10.6 (main, Aug 11 2022, 13:36:31) [Clang 13.1.6 (clang-1316.0.21.2.5)] on Darwin\r\n- Operating system and architecture: macOS Ventura 13.0.0.1, arm64\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-100375\n* gh-100401\n* gh-100402\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/YuriNek0","@type":"Person","name":"YuriNek0"},"datePublished":"2022-12-20T16:00:07.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/100374/cpython/issues/100374"}