linux/net/dccp
Gerrit Renker 5c7c9451f1 dccp: Basic data structure for feature negotiation
This patch prepares for the new and extended feature-negotiation routines.

The following feature-negotiation data structures are provided:
	* a container for the various (SP or NN) values,
	* symbolic state names to track feature states,
	* an entry struct which holds all current information together,
	* elementary functions to fill in and process these structures.

Entry structs are arranged as FIFO for the following reason: RFC 4340 specifies
that if multiple options of the same type are present, they are processed in the
order of their appearance in the packet; which means that this order needs to be
preserved in the local data structure (the later insertion code also respects
this order).

The struct list_head has been chosen for the following reasons: the most 
frequent operations are
 * add new entry at tail (when receiving Change or setting socket options);
 * delete entry (when Confirm has been received);
 * deep copy of entire list (cloning from listening socket onto request socket).

The NN value has been set to 64 bit, which is a currently sufficient upper limit
(Sequence Window feature has 48 bit).

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
2008-09-04 07:45:26 +02:00
..
ccids dccp ccid-3: Replace lazy BUG_ON with condition 2008-09-04 07:45:25 +02:00
ackvec.c dccp: Fix sparse warnings 2008-06-11 11:19:09 +01:00
ackvec.h
ccid.c
ccid.h
dccp.h tcp: Fix kernel panic when calling tcp_v(4/6)_md5_do_lookup 2008-08-06 23:50:04 -07:00
diag.c
feat.c dccp: Basic data structure for feature negotiation 2008-09-04 07:45:26 +02:00
feat.h dccp: Basic data structure for feature negotiation 2008-09-04 07:45:26 +02:00
input.c dccp: Always generate a Reset in response to option errors 2008-09-04 07:45:24 +02:00
ipv4.c dccp: Fix incorrect length check for ICMPv4 packets 2008-07-26 11:59:10 +01:00
ipv6.c dccp: Add check for truncated ICMPv6 DCCP error packets 2008-07-26 11:59:11 +01:00
ipv6.h
Kconfig
Makefile
minisocks.c tcp: Fix kernel panic when calling tcp_v(4/6)_md5_do_lookup 2008-08-06 23:50:04 -07:00
options.c dccp: Fill in the Data fields for "Option Error" Resets 2008-09-04 07:45:25 +02:00
output.c dccp: Bug-Fix - AWL was never updated 2008-07-26 11:59:10 +01:00
probe.c dccp: Fix sparse warnings 2008-06-11 11:19:09 +01:00
proto.c dccp: Toggle debug output without module unloading 2008-09-04 07:45:25 +02:00
sysctl.c
timer.c dccp: Allow to distinguish original and retransmitted packets 2008-07-26 11:59:09 +01:00