[DCCP]: Add socket option to query the current MPS

[linux-kernel-docs/linux-2.6.git] / Documentation / networking / dccp.txt

diff --git a/Documentation/networking/dccp.txt b/Documentation/networking/dccp.txt
index 4504cc5..f915718 100644 (file)
--- a/Documentation/networking/dccp.txt
+++ b/Documentation/networking/dccp.txt
@@ -41,6 +41,9 @@ 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.
 
+DCCP_SOCKOPT_GET_CUR_MPS is read-only and retrieves the current maximum packet
+size (application payload size) in bytes, see RFC 4340, section 14.
+
 DCCP_SOCKOPT_SEND_CSCOV and DCCP_SOCKOPT_RECV_CSCOV are used for setting the
 partial checksum coverage (RFC 4340, sec. 9.2). The default is that checksums
 always cover the entire packet and that only fully covered application data is
@@ -112,6 +115,11 @@ tx_qlen = 5
        The size of the transmit buffer in packets. A value of 0 corresponds
        to an unbounded transmit buffer.
 
+sync_ratelimit = 125 ms
+       The timeout between subsequent DCCP-Sync packets sent in response to
+       sequence-invalid packets on the same socket (RFC 4340, 7.5.4). The unit
+       of this parameter is milliseconds; a value of 0 disables rate-limiting.
+
 Notes
 =====