[Qemu-devel] [Bug 1075339] Re: linux-user emulation of setsockopt ignores optlen

[Peter Maydell]

Agreed; we would ideally be more careful to return ENOTSUP for options
we don't know we handle correctly. It would be useful if you said which
particular options you were interested in and provided a test case...

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https://bugs.launchpad.net/bugs/1075339

Title:
  linux-user emulation of setsockopt ignores optlen

Status in QEMU:
  New

Bug description:
  setsockopt always treats the argument as a 4-byte int. This breaks
  timeout options (for which it's an 8- or 16-byte timeval structure,
  depending on word size) and possibly other socket options. int is
  probably a safe default, but options whose values are other types need
  special-case conversion code.

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