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authorPhil Pennock <pdp@exim.org>2012-06-02 09:10:44 -0400
committerPhil Pennock <pdp@exim.org>2012-06-02 09:10:44 -0400
commit36a3ae5f08725242b1fb4dfecc5617cc9c3e971b (patch)
tree2e84f1bbab7081f841c413c3e4b6021c6d096e51 /doc/doc-docbook
parent9e4f596276eaa20045bdeb4bee2bf31438bfa0d3 (diff)
DSCP: document; hex print; -bI:dscp
Diffstat (limited to 'doc/doc-docbook')
-rw-r--r--doc/doc-docbook/spec.xfpt23
1 files changed, 23 insertions, 0 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 64aac1ae5..15a8f3550 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -2938,6 +2938,7 @@ if this is required. If the &%bi_command%& option is not set, calling Exim with
&%-bi%& is a no-op.
.new
+. // Keep :help first, then the rest in alphabetical order
.vitem &%-bI:help%&
.oindex "&%-bI:help%&"
.cindex "querying exim information"
@@ -2947,6 +2948,12 @@ consumption. This one is not. The &%-bI:help%& option asks Exim for a
synopsis of supported options beginning &`-bI:`&. Use of any of these
options shall cause Exim to exit after producing the requested output.
+.vitem &%-bI:dscp%&
+.oindex "&%-bI:dscp%&"
+.cindex "DSCP" "values"
+This option causes Exim to emit an alphabetically sorted list of all
+recognised DSCP names.
+
.vitem &%-bI:sieve%&
.oindex "&%-bI:sieve%&"
.cindex "Sieve filter" "capabilities"
@@ -22094,6 +22101,22 @@ See the &%search_parents%& option in chapter &<<CHAPdnslookup>>& for more
details.
+.new
+.option dscp smtp string unset
+.cindex "DCSP"
+.cindex "DiffServ"
+This option causes the DSCP value associated with a socket to be set to one
+of a number of fixed strings. The &%-bI:dscp%& option may be used to ask
+Exim which values it knows of. Common values include &`throughput`&,
+&`mincost`&, and on newer systems &`ef`&, &`af41`&, ...
+
+The outbound packets from Exim will be marked with this value in the header
+(for IPv4, the TOS field; for IPv6, the TCLASS field); there is no guarantee
+that these packets will have any effect, not be stripped by networking
+equipment, or do much of anything without cooperation with your Network
+Engineer and those of all network operators between the source and destination.
+.wen
+
.option fallback_hosts smtp "string list" unset
.cindex "fallback" "hosts specified on transport"