Return to happy-eyeballs-timeout-ms.d CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / curl / docs / cmdline-opts

Annotation of embedaddon/curl/docs/cmdline-opts/happy-eyeballs-timeout-ms.d, revision 1.1.1.1

1.1       misho       1: Long: happy-eyeballs-timeout-ms
                      2: Arg: <milliseconds>
                      3: Help: How long to wait in milliseconds for IPv6 before trying IPv4
                      4: Added: 7.59.0
                      5: ---
                      6: Happy eyeballs is an algorithm that attempts to connect to both IPv4 and IPv6
                      7: addresses for dual-stack hosts, preferring IPv6 first for the number of
                      8: milliseconds. If the IPv6 address cannot be connected to within that time then
                      9: a connection attempt is made to the IPv4 address in parallel. The first
                     10: connection to be established is the one that is used.
                     11: 
                     12: The range of suggested useful values is limited. Happy Eyeballs RFC 6555 says
                     13: "It is RECOMMENDED that connection attempts be paced 150-250 ms apart to
                     14: balance human factors against network load." libcurl currently defaults to
                     15: 200 ms. Firefox and Chrome currently default to 300 ms.
                     16: 
                     17: If this option is used several times, the last one will be used.