<p><b>@rfuchs</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/kamailio/kamailio/pull/1442#discussion_r169154987">src/modules/rtpengine/rtpengine.c</a>:</p>
<pre style='color:#555'>> @@ -1675,6 +1677,20 @@ static int build_rtpp_socks() {
                                LM_WARN("Failed enable set MTU discovery socket option\n");
 #endif
 
+                       if((0 <= control_cmd_tos) && (control_cmd_tos < 256)) {
+                               unsigned char tos = control_cmd_tos;
+                               if (pnode->rn_umode == 6) {
+                                       setsockopt(rtpp_socks[pnode->idx], IPPROTO_IPV6,
+                                                       IPV6_TCLASS, &tos,
+                                                       sizeof(tos));
</pre>
<p>Sorry, I guess I should have been more clear. The argument to the IPv6 version IPV6_TCLASS is in fact an int. It's just the IPv4 IP_TOS that takes an unsigned char.</p>

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