Widen TCP flags handling.

Widen TCP flags handling from 7 bits (uint8_t) to 12 bits (uint16_t).
The kernel interface remains at 8 bits, which makes no functional
difference now, as none of the higher bits is currently of interest
to the userspace.

Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
TCP flags matching support.

    tcp_flags=flags/mask
        Bitwise  match on TCP flags.  The flags and mask are 16-bit num‐
        bers written in decimal or in hexadecimal prefixed by 0x.   Each
        1-bit  in  mask requires that the corresponding bit in port must
        match.  Each 0-bit in mask causes the corresponding  bit  to  be
        ignored.

        TCP  protocol  currently  defines  9 flag bits, and additional 3
        bits are reserved (must be transmitted as zero), see  RFCs  793,
        3168, and 3540.  The flag bits are, numbering from the least
	significant bit:

        0: FIN No more data from sender.

        1: SYN Synchronize sequence numbers.

        2: RST Reset the connection.

        3: PSH Push function.

        4: ACK Acknowledgement field significant.

        5: URG Urgent pointer field significant.

        6: ECE ECN Echo.

        7: CWR Congestion Windows Reduced.

        8: NS  Nonce Sum.

        9-11:  Reserved.

        12-15: Not matchable, must be zero.

Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
vswitch.xml: Improve documentation for BFD.

This update improves the BFD documentation in a few ways:

   - Demand mode is now supported.

   - Wordsmithing, spelling, etc.

   - Attempt to better explain decay_min_rx, forwarding_if_rx, and
     cpath_down.

   - Break into subgroups for configuration and status, to better explain
     which party sets which fields.

   - Reindents to match the rest of vswitch.xml.

Because of the reindentation, this patch may be easier to view with spacing
changes suppressed.

Signed-off-by: Ben Pfaff <blp@nicira.com>
openflow-1.2.h: Remove redundant definition of OFPST12_GROUP_FEATURES.

Message types are defined in ofp-msgs.h these days.

Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Joe Stringer <joestringer@nicira.com>
Implement OFPT_QUEUE_GET_CONFIG_REQUEST and OFPT_QUEUE_GET_CONFIG_REPLY.

Open vSwitch has never implemented this request and reply, even though they
have been in OpenFlow since version 1.0.  This commit adds an
implementation.

Signed-off: Venkitachalam Gopalakrishnan <gops@vmware.com>
Co-authored-by: Ben Pfaff <blp@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Joe Stringer <joestringer@nicira.com>
vtep: Bring BFD specification in vtep.xml into sync with OVS.

A number of new key-value pairs have been added to the bfd and bfd_status
columns of the OVS schema since the VTEP schema was created. To aid
interoperability between OVS instances and VTEPs, this patch brings
the VTEP schema into line with that of OVS.

CC: Bruce Davie <bdavie@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
include/openflow: Add OpenFlow 1.4 header file

It contains only Set-Async-Config and Role status message definitions.

Signed-off-by: Alexandru Copot <alex.mihai.c@gmail.com>
Cc: Daniel Baluta <dbaluta@ixiacom.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
ofproto: Add support for sending OFPTYPE_ROLE_STATUS messages.

When a controller changes its role to MASTER, the others are marked
as SLAVE. This patch makes it possible to notify the controllers
of this change.

Signed-off-by: Alexandru Copot <alex.mihai.c@gmail.com>
Cc: Daniel Baluta <dbaluta@ixiacom.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
classifier: Rename struct cls_table as cls_subtable.

The naming of the classifier table has been a source of confusion,
since each OpenFlow table is implemented as a classifier, which
consists of multiple (sub)tables.  This name change hopefully makes
classifier related discussion a bit less confusing.

For consistency, relevant field names as well as the function and
variable names have been renamed in similar fashion.

Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
datapath: Simplify vport-netdev-hook compatibility code.

Move compat code to netdev_rx_handler_register() definition.
It also adds type safety for netdev-hook.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>