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Groups > linux.debian.kernel > #85798

Bug#966459: linux: traffic class socket options (both IPv4/IPv6) inconsistent with docs/standards

Cross-posted to 2 groups.

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Hi,

On Tue, Aug 04, 2020 at 08:59:42PM +0200, Thorsten Glaser wrote:
> On Mon, 3 Aug 2020, Thorsten Glaser wrote:
> 
> > keep the code I currently have that compares byte 0 and 3, using
> 
> Actually not. I’ve added some debugging code with…
> 
> static size_t
> cmsg_actual_data_len(const struct cmsghdr *cmsg)
> {
>         union {
>                 const struct cmsghdr *cmsg;
>                 const unsigned char *uc;
>         } ptr[(
>                 /* compile-time assertions */
>                 sizeof(socklen_t) <= sizeof(size_t)
>             ) ? 1 : -1];
>         ptrdiff_t pd;
> 
>         ptr[0].cmsg = cmsg;
>         pd = CMSG_DATA(cmsg) - ptr[0].uc;
>         return ((size_t)cmsg->cmsg_len - (size_t)pd);
> }
> 
> … and dumping the received data on Linux and MidnightBSD
> (the two systems I currently have access) and found varying
> results but if this returns 4 I think I better consume an int.

I see it was forwarded back then to
https://lore.kernel.org/netdev/e67190b7de22fff20fb4c5c084307e0b76001248.camel@decadent.org.uk/
but there was no comment from netdev people.

Should this bug be closed?

Regards,
Salvatore

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Bug#966459: linux: traffic class socket options (both IPv4/IPv6) inconsistent with docs/standards Salvatore Bonaccorso <carnil@debian.org> - 2025-02-20 13:30 +0100
  Processed: Re: Bug#966459: linux: traffic class socket options  (both IPv4/IPv6) inconsistent with docs/standards "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-02-20 13:30 +0100

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