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diff --git a/ggo/dccp_recv.m4 b/ggo/dccp_recv.m4
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+++ b/ggo/dccp_recv.m4
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+option "host" i
+"ip or host"
+string default="localhost"
+optional
+details="
+	Both IPv4 and IPv6 addresses are supported.
+"
+
+option "port" p
+"port to connect to"
+int
+default="8000"
+optional
+
+option "ccid" c
+"CCID preference(s) for this connection"
+int
+# restrict the maximum number of times this option can be passed
+optional multiple(-10)
+# currently known CCIDs:
+# - CCID-2 (RFC 4341),
+# - CCID-3 (RFC 4342),
+# - CCID-4 (RFC 5622),
+# - CCID-248 ... CCID-254 are experimental (RFC 4340, 19.5)
+values="2", "3", "4", "248", "249", "250", "251", "252", "253", "254"
+details="
+	When present exactly once, this option mandates the CCID for the
+	sender-receiver connection. If it is passed more than once, it sets
+	a preference list where the order of appearance signifies descending
+	priority. For example, passing 4, 2, 3 creates the preference list
+	(CCID-4, CCID-2, CCID-3), assigning CCID-4 highest preference.
+
+	The request is reconciled with the CCIDs on the server through the
+	'server-priority' mechanism of RFC 4340 6.3.1/10. The server CCIDs
+	can be listed by calling 'para_client si'.
+
+"