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
<[email protected]>
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