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https://issues.apache.org/jira/browse/TS-2995?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alan M. Carroll resolved TS-2995.
---------------------------------
Resolution: Fixed
> Setting client response TOS/DSCP field has no effect
> ----------------------------------------------------
>
> Key: TS-2995
> URL: https://issues.apache.org/jira/browse/TS-2995
> Project: Traffic Server
> Issue Type: Bug
> Reporter: Jack Bates
> Assignee: Jack Bates
> Fix For: 5.1.0
>
>
> {{proxy.config.net.sock_packet_tos_in}} has no effect if
> {{proxy.config.accept_threads}} is not zero.
> If it is zero then {{UnixNetProcessor::accept_internal()}} calls
> {{NetAccept::init_accept_per_thread()}} which eventually calls
> {{NetAccept::acceptFastEvent()}} in which there's code to set the {{SO_MARK}}
> and {{IP_TOS}} socket options.
> But if it's not zero then {{UnixNetProcessor::accept_internal()}} instead
> calls {{NetAccept::init_accept_loop()}} which eventually calls
> {{NetAccept::do_blocking_accept()}}
> One fix is to copy the code to set the {{SO_MARK}} and {{IP_TOS}} socket
> options from {{NetAccept::acceptFastEvent()}} to
> {{NetAccept::do_blocking_accept()}}
> {code}
> --- a/iocore/net/UnixNetAccept.cc
> +++ b/iocore/net/UnixNetAccept.cc
> @@ -275,6 +275,18 @@ NetAccept::do_blocking_accept(EThread * t)
> return -1;
> }
>
> +#if TS_HAS_SO_MARK
> + if (packet_mark != 0) {
> + safe_setsockopt(con.fd, SOL_SOCKET, SO_MARK, reinterpret_cast<char
> *>(&
> + }
> +#endif
> +
> +#if TS_HAS_IP_TOS
> + if (packet_tos != 0) {
> + safe_setsockopt(con.fd, IPPROTO_IP, IP_TOS, reinterpret_cast<char
> *>(&p
> + }
> +#endif
> +
> // Use 'NULL' to Bypass thread allocator
> vc = (UnixNetVConnection *)this->getNetProcessor()->allocate_vc(NULL);
> if (!vc) {
> {code}
> I tested this change and verified that
> {{proxy.config.net.sock_packet_tos_in}} does correctly set the TOS/DSCP field.
> This issue was reported by Jason Strongman on the users list
> http://thread.gmane.org/gmane.comp.apache.trafficserver.user/4141/focus=4202
> {{proxy.config.net.sock_packet_tos_in}} was introduced in TS-1090 and commit
> b77838991531d6cb402618c3d690b83e95b92d63
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