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2abfc759b9
Option cleanups: --get is not upload --form* are post - added several options into ldap, smtp, imap and pop3 - shortened the category descriptions in the list category curl fixes: --create-dirs removed from 'curl' --ftp-create-dirs removed from 'curl' --netrc moved to 'auth' from 'curl' --netrc-file moved to 'auth' from 'curl' --netrc-optional moved to 'auth' from 'curl' --no-buffer moved to 'output' from 'curl' --no-clobber removed from 'curl' --output removed from 'curl' --output-dir removed from 'curl' --remove-on-error removed from 'curl' Add a "global" category: - Made all "global" options set this category Add a "deprecated" category: - Moved the deprecated options to it (maybe they should not be in any category long term) Add a 'timeout' category - Put a number of appropriate options in it Add an 'ldap' category - Put the LDAP related option in there Remove categories "ECH" and "ipfs" - They should not be categories. Had only one single option each. Remove category "misc" - It should not be a category as it is impossible to know when to browse it. --use-ascii moved to ftp and output --xattr moved to output --service-name moved to auth Managen fixes: - errors if an option is given a category name that is not already setup for in code - verifies that options set `scope: global` also is put in category `global´ Closes #14101
29 lines
1006 B
Markdown
29 lines
1006 B
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Long: happy-eyeballs-timeout-ms
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Arg: <ms>
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Help: Time for IPv6 before IPv4
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Added: 7.59.0
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Category: connection timeout
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Multi: single
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See-also:
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- max-time
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- connect-timeout
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Example:
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- --happy-eyeballs-timeout-ms 500 $URL
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---
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# `--happy-eyeballs-timeout-ms`
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Happy Eyeballs is an algorithm that attempts to connect to both IPv4 and IPv6
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addresses for dual-stack hosts, giving IPv6 a head-start of the specified
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number of milliseconds. If the IPv6 address cannot be connected to within that
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time, then a connection attempt is made to the IPv4 address in parallel. The
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first connection to be established is the one that is used.
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The range of suggested useful values is limited. Happy Eyeballs RFC 6555 says
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"It is RECOMMENDED that connection attempts be paced 150-250 ms apart to
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balance human factors against network load." libcurl currently defaults to
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200 ms. Firefox and Chrome currently default to 300 ms.
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