BTW issue open: https://github.com/libuv/libuv/issues/2536
On Wed, 6 Nov 2019 at 13:30, Iñaki Baz Castillo <i...@aliax.net> wrote:
>
> Thanks, will do.
>
> On Wed, 6 Nov 2019 at 01:51, Santiago Gimeno <santiago.gim...@gmail.com>
> wrote:
> >
> > Hi Iñaki,
> >
> > I don't think there is a way right now though I think it might be
> > implemented by extending the uv_udp_send_t structure to hold a
> > "before_send" cb so you can set the option, which in turn could bet unset
> > in the send_cb. (extending the uv_udp_send_t might be possible by using one
> > entry in the reserved field of the uv_req). Of course, this is just an idea
> > which could be bad or simply wrong. I would open an issue in the libuv repo
> > to discuss your use case and possible solutions.
> >
> > Cheers,
> >
> > Santi
> >
> > El mar., 5 nov. 2019 a las 6:18, Iñaki Baz Castillo (<i...@aliax.net>)
> > escribió:
> >>
> >> Hi, just wondering how to deal with this scenario in which I need to
> >> set different DSCP values to UDP packets (actually IP packets) sent on
> >> the same uv_udp_t handle.
> >>
> >> For instance, I send RTP audio and video packets and need to set a
> >> specific DSCP/ToS value **just** for audio packets:
> >>
> >> pseudo-code:
> >> -------------------------------------------------
> >> int tos = 0x60; // CS3 just for audio packets.
> >> uv_os_fd_t fd;
> >>
> >> // Get the real file descriptor from our libuv UDP handle:
> >> uv_fileno((const uv_handle_t*)udpHandle, &fd);
> >>
> >> // Set ToS/DSCP:
> >> if (setsockopt(sock, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)) < 0) {
> >> fprintf(stderr,"Error setting TOS: %s\n", strerror(errno));
> >> }
> >>
> >> // Try to send the packet synchronously:
> >> uv_udp_try_send(....);
> >>
> >> // It fails, so send it asynchronously:
> >> uv_udp_send(....);
> >> --------------------------------------------------
> >>
> >> This is: before sending each packet I need to call setsockopt() with
> >> the corresponding DSCP/ToS value for that packet. However, since I may
> >> need to use uv_udp_send() it may happen that, when libuv finally sends
> >> the RTP audio packet, the socket DSCP setting may has been modified
> >> again due to a new call to setsockopt() for a different packet to be
> >> sent.
> >>
> >> Just wondering if there is a way to tell libuv "please send this
> >> socket option for sending this data no matter when such a data is
> >> actually sent.
> >>
> >> Thanks a lot.
> >>
> >>
> >> --
> >> Iñaki Baz Castillo
> >> <i...@aliax.net>
> >>
> >> --
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> >
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>
>
>
> --
> Iñaki Baz Castillo
> <i...@aliax.net>
--
Iñaki Baz Castillo
<i...@aliax.net>
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