tree fd58a201bef89dd7c3882ee97cd56f10f0010d7d
parent 069967be86bc8f341d23e45fa8c8a967f6d22eea
author Harald Welte <laforge@osmocom.org> 1619552674 +0200
committer Harald Welte <laforge@osmocom.org> 1619553212 +0200

socket: Introduce osmo_sock_set_dscp() to set socket DSCP value

At least on Linux, sockets have a IP_TOS socket option that can be
configured to set the TOS.  However, TOS (of RFC791) was replaced
by the DSCP (of RFC2474) in 1998.

As the DCSP bits are only the upper 6 bits of the TOS bits, let's
introduce a helper to get, mask and set the DSCP values in the TOS
bits.

Related: OS#5136, SYS#5427
Change-Id: Ia4ba389a5b7e3e9d5f17a742a900d6fd68c08e40