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-rw-r--r--Documentation/networking/dccp.txt8
1 files changed, 5 insertions, 3 deletions
diff --git a/Documentation/networking/dccp.txt b/Documentation/networking/dccp.txt
index c45daabd3bfe..74563b38ffd9 100644
--- a/Documentation/networking/dccp.txt
+++ b/Documentation/networking/dccp.txt
@@ -1,7 +1,6 @@
DCCP protocol
============
-Last updated: 10 November 2005
Contents
========
@@ -42,8 +41,11 @@ Socket options
DCCP_SOCKOPT_PACKET_SIZE is used for CCID3 to set default packet size for
calculations.
-DCCP_SOCKOPT_SERVICE sets the service. This is compulsory as per the
-specification. If you don't set it you will get EPROTO.
+DCCP_SOCKOPT_SERVICE sets the service. The specification mandates use of
+service codes (RFC 4340, sec. 8.1.2); if this socket option is not set,
+the socket will fall back to 0 (which means that no meaningful service code
+is present). Connecting sockets set at most one service option; for
+listening sockets, multiple service codes can be specified.
Notes
=====