kernel.git/net/dccp/ackvec.h, branch linux-2.6.34.y

dccp: Minimise header option overhead in setting the MPS

2009-03-02T11:07:23Z

This patch resolves a long-standing FIXME to dynamically update the Maximum Packet Size depending on actual options usage. It uses the flags set by the feature-negotiation infrastructure to compute the required header option size. Most options are fixed-size, a notable exception are Ack Vectors (required currently only by CCID-2). These can have any length between 3 and 1020 bytes. As a result of testing, 16 bytes (2 bytes for type/length plus 14 Ack Vector cells) have been found to be sufficient for loss-free situations. There are currently no CCID-specific header options which may appear on data packets, thus it is not necessary to define a corresponding CCID field as suggested in the old comment. Further changes: ---------------- Adjusted the type of 'cur_mps' to match the unsigned return type of the function. Signed-off-by: Gerrit Renker Acked-by: Ian McDonald Signed-off-by: David S. Miller

dccp: Clean up ccid.c after integration of CCID plugins

2009-01-05T05:43:23Z

This patch cleans up after integrating the CCID modules and, in addition, * moves the if/else cases from ccid_delete() into ccid_hc_{tx,rx}_delete(); * removes the 'gfp' argument to ccid_new() - since it is always gfp_any(). Signed-off-by: Gerrit Renker Signed-off-by: David S. Miller

dccp: Lockless integration of CCID congestion-control plugins

2009-01-05T05:42:53Z

Based on Arnaldo's earlier patch, this patch integrates the standardised CCID congestion control plugins (CCID-2 and CCID-3) of DCCP with dccp.ko: * enables a faster connection path by eliminating the need to always go through the CCID registration lock; * updates the implementation to use only a single array whose size equals the number of configured CCIDs instead of the maximum (256); * since the CCIDs are now fixed array elements, synchronization is no longer needed, simplifying use and implementation. CCID-2 is suggested as minimum for a basic DCCP implementation (RFC 4340, 10); CCID-3 is a standards-track CCID supported by RFC 4342 and RFC 5348. Signed-off-by: Gerrit Renker Signed-off-by: David S. Miller

dccp: Set per-connection CCIDs via socket options

2008-11-24T00:02:31Z

With this patch, TX/RX CCIDs can now be changed on a per-connection basis, which overrides the defaults set by the global sysctl variables for TX/RX CCIDs. To make full use of this facility, the remaining patches of this patch set are needed, which track dependencies and activate negotiated feature values. Signed-off-by: Gerrit Renker Signed-off-by: David S. Miller

[ACKVEC]: Reduce length of identifiers

2008-01-28T22:54:51Z

This is reduces the length of the struct ackvec/ackvec_record fields. It is a purely text-based replacement: s#dccpavr_#avr_#g; s#dccpav_#av_#g; and increases readability somewhat. Signed-off-by: Gerrit Renker Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller

[DCCP]: Spelling fixes

2007-12-20T21:59:39Z

Signed-off-by: Joe Perches Signed-off-by: David S. Miller

[DCCP] ackvec: Convert to ktime_t

2007-10-10T23:48:14Z

Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller

[DCCP] ackvec: infrastructure for sending more than one ackvec per packet

2006-12-03T05:30:32Z

Commiter note: This was split from Andrea's original patch, in the process I changed the type of the ackvec index fields to u16 instead of to int and haven't folded dccp_ackvec_parse with dccp_ackvec_check_rcv_ackno. Next patch will actually do the insertion of more than one ackvec per packet, using, initially, up to a max of 2 ackvecs as per Andrea's original patch, then I'll work on support for larger ackvecs, be it using a sysctl or using setsockopt. Signed-off-by: Andrea Bittau Signed-off-by: Arnaldo Carvalho de Melo

[DCCP] ackvec: Remove unused dccpav_ack_ptr field from dccp_ackvec

2006-12-03T05:30:31Z

Commiter note: original patch was splitted. Signed-off-by: Andrea Bittau Signed-off-by: Arnaldo Carvalho de Melo

[DCCP]: Update documentation references.

2006-10-24T23:17:51Z

Updates the references to spec documents throughout the code, taking into account that * the DCCP, CCID 2, and CCID 3 drafts all became RFCs in March this year * RFC 1063 was obsoleted by RFC 1191 * draft-ietf-tcpimpl-pmtud-0x.txt was published as an Informational RFC, RFC 2923 on 2000-09-22. All references verified. Signed-off-by: Gerrit Renker Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller