IEEE Std 802.11-2012 8.4.2.97 says that if a non-AP STA could not find DHCP neither in the exceptions nor in DHCP ranges, it sets UP to 0
However, cfg80211_classify8021d has the following code
if (qos_map) {
unsigned int i, tmp_dscp = dscp >> 2;
for (i = 0; i < qos_map->num_des; i++) {
if (tmp_dscp == qos_map->dscp_exception[i].dscp) {
ret = qos_map->dscp_exception[i].up;
goto out;
}
}
for (i = 0; i < 8; i++) {
if (tmp_dscp >= qos_map->up[i].low &&
tmp_dscp <= qos_map->up[i].high) {
ret = i;
goto out;
}
}
}
/* The default mapping as defined Section 2.3 in RFC8325: The three
* Most Significant Bits (MSBs) of the DSCP are used as the
* corresponding L2 markings.
*/
ret = dscp >> 5;
As you can see, even in the presence of qos_map, it falls through to the default DSCP mapping, instead of assigning 0
Is this intended? If so, why?
