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authorGerrit Renker <gerrit@erg.abdn.ac.uk>2008-09-04 09:30:19 +0400
committerGerrit Renker <gerrit@erg.abdn.ac.uk>2008-09-04 09:45:32 +0400
commit51c7d4fa2675c106a980ddcdbe308b54b5151945 (patch)
tree0c1f2b1a3323582fb8629ba7826e08710271ed49 /Documentation/networking
parent09856c108956c99088ead9267ccbd1dab77f7043 (diff)
downloadlinux-51c7d4fa2675c106a980ddcdbe308b54b5151945.tar.xz
dccp: Implement both feature-local and feature-remote Sequence Window feature
This adds full support for local/remote Sequence Window feature, from which the * sequence-number-validity (W) and * acknowledgment-number-validity (W') windows derive as specified in RFC 4340, 7.5.3. Specifically, the following changes are introduced: * integrated new socket fields into dccp_sk; * updated the update_gsr/gss routines with regard to these fields; * updated handler code: the Sequence Window feature is located at the TX side, so the local feature is meant if the handler-rx flag is false; * the initialisation of `rcv_wnd' in reqsk is removed, since - rcv_wnd is not used by the code anywhere; - sequence number checks are not done in the LISTEN state (cf. 7.5.3); - dccp_check_req checks the Ack number validity more rigorously; * the `struct dccp_minisock' became empty and is now removed. Until the handshake completes with activating negotiated values, the local/remote Sequence-Window values are undefined and thus can not reliably be estimated. This issue is addressed in a separate patch. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Diffstat (limited to 'Documentation/networking')
-rw-r--r--Documentation/networking/dccp.txt3
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/networking/dccp.txt b/Documentation/networking/dccp.txt
index 7a3bb1abb830..b132e4a3cf0f 100644
--- a/Documentation/networking/dccp.txt
+++ b/Documentation/networking/dccp.txt
@@ -141,7 +141,8 @@ rx_ccid = 2
Default CCID for the receiver-sender half-connection; see tx_ccid.
seq_window = 100
- The initial sequence window (sec. 7.5.2).
+ The initial sequence window (sec. 7.5.2) of the sender. This influences
+ the local ackno validity and the remote seqno validity windows (7.5.1).
tx_qlen = 5
The size of the transmit buffer in packets. A value of 0 corresponds