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dnsdist: Fix TCP with Fast Open requested but unsupported #5454

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merged 1 commit into from Jun 27, 2017

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rgacogne commented Jun 23, 2017

Short description

If tcpFastOpen is set on a backend, we used to skip the connect() call regardless of MSG_FASTOPEN availability. We then tried to call sendmsg() (without MSG_FASTOPEN) on an unconnected TCP socket, which failed.

Fixes #5452.

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I have:

  • read the CONTRIBUTING.md document
  • compiled and tested this code
  • included documentation (including possible behaviour changes)
  • documented the code
  • added or modified regression test(s)
  • added or modified unit test(s)
dnsdist: Fix TCP with Fast Open requested but unsupported
If `tcpFastOpen` is set on a backend, we used to skip the
`connect()` call regardless of `MSG_FASTOPEN` availability.
We then tried to call `sendmsg()` (without `MSG_FASTOPEN`)
on an unconnected TCP socket, which failed.

@rgacogne rgacogne added this to the dnsdist-1.2.0 milestone Jun 23, 2017

@pieterlexis pieterlexis merged commit df877d5 into PowerDNS:master Jun 27, 2017

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@rgacogne rgacogne deleted the rgacogne:dnsdist-tcp-fastopen-not-available branch Jun 27, 2017

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