This is Edition 7.20141001, last updated 2014-10-25, of
The OpenSS7 Installation and Reference Manual, for Version
1.1 release 7.20141001 of the
OpenSS7 package.
Preface
Notice
This package is released and distributed under the AGPL (see GNU Affero General Public License). Please note, however, that there are different licensing terms for the manual pages and
some of the documentation (derived from OpenGroup1
publications and other sources). Consult the permission notices contained in the documentation for
more information.
This manual is released under the FDL (see GNU Free Documentation License) with no
invariant sections, no front-cover texts and no back-cover texts.
Abstract
This manual provides a Installation and Reference Manual for OpenSS7.
Objective
The objective of this manual is to provide a guide for the STREAMS programmer when
developing STREAMS modules, drivers and application programs for OpenSS7.
This guide provides information to developers on the use of the STREAMS mechanism at user and
kernel levels.
STREAMS was incorporated in UNIX System V Release 3 to augment the character input/output
(I/O) mechanism and to support development of communication services.
STREAMS provides developers with integral functions, a set of utility routines, and facilities
that expedite software design and implementation.
Intent
The intent of this manual is to act as an introductory guide to the STREAMS programmer. It
is intended to be read alone and is not intended to replace or supplement the
OpenSS7 manual pages. For a reference for writing code, the manual pages
(see STREAMS(9)) provide a better reference to the programmer.
Although this describes the features of the OpenSS7 package,
OpenSS7 Corporation is under no obligation to provide any software,
system or feature listed herein.
Audience
This manual is intended for a highly technical audience. The reader should already be familiar
with Linux kernel programming, the Linux file system, character devices, driver input
and output, interrupts, software interrupt handling, scheduling, process contexts, multiprocessor
locks, etc.
The guide is intended for network and systems programmers, who use the STREAMS mechanism at
user and kernel levels for Linux and UNIX system communication services.
Readers of the guide are expected to possess prior knowledge of the Linux and UNIX
system, programming, networking, and data communication.
Revision History
Take care that you are working with a current version of this manual: you will not be notified of
updates. To ensure that you are working with a current version, contact the
Author, or check The OpenSS7
Project website for a current version.
A current version of this manual is normally distributed with the OpenSS7
package, openss7-1.1.7.20141001.2
Version Control
Although the author has attempted to ensure that the information in this document is complete and
correct, neither the Author nor OpenSS7 Corporation will take any responsibility in it.
OpenSS7 Corporation is making this documentation available as a reference point for the
industry. While OpenSS7 Corporation believes that these interfaces are well defined in this
release of the document, minor changes may be made prior to products conforming to the interfaces
being made available. OpenSS7 Corporation reserves the right to revise this software and
documentation for any reason, including but not limited to, conformity with standards promulgated by
various agencies, utilization of advances in the state of the technical arts, or the reflection of
changes in the design of any techniques, or procedures embodied, described, or referred to herein.
OpenSS7 Corporation is under no obligation to provide any feature listed herein.
$Log: STREAMS.texi,v $
Revision 1.1.2.3 2011-02-07 02:21:33 brian
- updated manuals
Revision 1.1.2.2 2010-11-28 13:41:16 brian
- documentation updates
Revision 1.1.2.1 2009-06-21 10:40:08 brian
- added files to new distro
ISO 9000 Compliance
Only the TeX, texinfo, or roff source for this manual is controlled. An opaque (printed,
postscript or portable document format) version of this manual is an UNCONTROLLED VERSION.
Disclaimer
OpenSS7 Corporation disclaims all warranties with regard to this documentation
including all implied warranties of merchantability, fitness for a particular purpose,
non-infringement, or title; that the contents of the manual are suitable for any purpose, or that
the implementation of such contents will not infringe on any third party patents, copyrights,
trademarks or other rights. In no event shall OpenSS7 Corporation be liable for any direct,
indirect, special or consequential damages or any damages whatsoever resulting from loss of use,
data or profits, whether in an action or contract, negligence or other tortious action, arising out
of or in connection with any use of this documentation or the performance or implementation of the
contents thereof.
U.S. Government Restricted Rights
If you are licensing this Software on behalf of the U.S. Government ("Government"), the following
provisions apply to you. If the Software is supplied by the Department of Defense ("DoD"), it is
classified as "Commercial Computer Software" under paragraph 252.227-7014 of the DoD Supplement to
the Federal Acquisition Regulations ("DFARS") (or any successor regulations) and the Government is
acquiring only the license rights granted herein (the license rights customarily provided to
non-Government users). If the Software is supplied to any unit or agency of the Government other
than DoD, it is classified as "Restricted Computer Software" and the Government’s rights in the
Software are defined in paragraph 52.227-19 of the Federal Acquisition Regulations ("FAR") (or any
successor regulations) or, in the cases of NASA, in paragraph 18.52.227-86 of the NASA Supplement to
the FAR (or any successor regulations).
Thanks to the subscribers to and sponsors of The OpenSS7 Project.
Without their support, open software like this would not be possible.
As with most open source projects, this project would not have been possible without the valiant
efforts and productive software of the Free Software Foundation,
the Linux Kernel Community, and the open source software
movement at large.
Sponsors
Funding for completion of the OpenSS7 OpenSS7 package was
provided in part by:
It would be difficult for the OpenSS7 Project to attain the conformance and
certifications that it has without the free availability of specifications
documents and standards from standards bodies and industry associations. In
particular, the following:
Of these, ICAO, ISO, IEEE and EIA have made at least some documents publicly
available. ANSI is notably missing from the list: at one time draft documents
were available from ANSI (ATIS), but that was curtailed some years ago.
Telecordia does not release any standards publicly. Hopefully these
organizations will see the light and realize, as the others have, that to remain
current as a standards organization in today’s digital economy requires
providing individuals with free access to documents.
Please send bug reports to bugs@openss7.org using the send-pr script
included in the package, only after reading the BUGS file in the release, or See Problem Reports.
Please send bug reports to bugs@openss7.org using the send-pr script included in the
OpenSS7 package, only after reading the BUGS file in the release, or
See Problem Reports. You can access the
OpenSS7 GNATS database directly via the web, however,
the preferred method for sending new bug reports is via mail with the send-pr script.
These are mailman mailing lists and so have convenient web interfaces for subscribers to
control their settings. See http://www.openss7.org/mailinglist.html.
The openss7 mailing list is for general enquiries, information exchange and announcements
regarding the OpenSS7 Project. This is our original mailing list
and takes the highest amount of traffic.
The openss7-announce mailing list is for announcements related to the
OpenSS7 Project. This list will accept announcements posted by
subscribers. Subscribe to this list if you are interested in announcements from the
OpenSS7 Project, subscribers and sponsors, related to the
OpenSS7 Project or STREAMS, SS7, SIGTRAN or SCTP in general.
The openss7-cvs mailing list is for automatic CVS log reporting. You must get permission of
the owner to subscribe to this list. Subscribers are not allowed to post to this list, this is
merely for distributing notification of changes to the CVS repository.h
The openss7-develop mailing list is for email exchange related to the development projects
under the OpenSS7 Project. This includes development requests,
proposals, requests for comment or proposal. Subscribe to this list if you are interested in
ongoing development details regarding the OpenSS7 Project.
The openss7-test mailing list is for email exchange related to the testing of code under the
OpenSS7 Project. This specifically relates to conformance testing,
verification testing, interoperability testing and beta testing. Subscribe to this list if you are
interested in participating in and receiving ongoing details of test activities under the
OpenSS7 Project.
The openss7-bugs mailing list is specifically tailored to bug tracking. The mailing list
takes a feed from the OpenSS7 GNATS bug tracking
system and accepts posting of responses to bug reports, tracking and resolution. Subscribe to this
list if you are interested in receiving detailed OpenSS7 release code bug tracking
information. This list is not archived; for historical information on problem reports, see our
GNATS databases.
The openss7-updates mailing list provides updates on OpenSS7
Project code releases and ongoing activities. Subscribers are not allowed to post to this list;
this list is for official OpenSS7 Project announcements only.
Subscribe to this list if you are interested in receiving updates concerning official releases and
activities of the OpenSS7 Project.
The openss7-streams mailing list is for email exchange related to the STREAMS
development projects under the OpenSS7 Project. This includes
development requests, proposals, requests for comment or proposal. Subscribe to this list if you
are interested in ongoing development details regarding the OpenSS7
ProjectSTREAMS components.
The linux-streams mailing list is for mail exchange related to Linux Fast-STREAMS or
Linux STREAMS. This includes patches, development requests, proposals, requests for comment
or proposal. Subscribe to this list if you are interested in ongoing development details regarding
the STREAMS for Linux components. This is the the new (September 2006) home of the
linux-streams list formerly of ‘gsyc.escet.urjc.es’.
Spam
To avoid spam being sent to the members of the OpenSS7 mailing list(s), we have blocked mail
from non-subscribers. Please subscribe to the mailing list before attempting to post to them.
(Attempts to post when not subscribed get bounced.)
As an additional measure against spam, subscriber lists for all OpenSS7 mailing lists are not
accessible to non-subscribers; for most lists subscriber lists are only accessible to the list
administrator. This keeps your mailing address from being picked off our website by bulk mailers.
Acceptable Use Policy
It is acceptable to post professional and courteous messages regarding the OpenSS7 package or
any general information or questions concerning STREAMS, SS7, SIGTRAN, SCTP
or telecommunications applications in general.
Large Attachments
The mailing list is blocked from messages of greater than 40k. If you have attachments
(patches, test programs, etc.) and you mail them to the list, it will bounce to the list
administrator. If you are interested in making your patches, test programs, test results or other
large attachments available to the members of the mailing list, state in the message that you would
like them posted and the list administrator will place them in the mail archives.
Quick Start Guide
OpenSS7
Package openss7-1.1.7.20141001 was released under AGPLv3 2014-10-25.
This is the OpenSS7 package. It contains all of the
OpenSS7 Project
release code. This is the only package released by the
OpenSS7 Project.
The package contains all of the former subpackages of the OpenSS7 Master
Package, including:
• Linux Fast-STREAMS
• STREAMS Compatibility Modules
• STREAMS Utilities
• STREAMS Terminals
• STREAMS X/Open Networking Services
• STREAMS X/Open Networking XTI/TLI Library
• STREAMS Sockets
• STREAMS Internet Protocol Drivers
• STREAMS SCTP
• STREAMS Channels and Multiplexing
• STREAMS X.25 and Frame Relay Stack
• STREAMS Open Systems Interconnect (OSI) Stack
• STREAMS ISDN Stack
• STREAMS ATM Stack
• STREAMS SS7 Stack
• STREAMS SIGTRAN Stack
• STREAMS VoiP Stack
Fully deprecated by this release and no longer released by the
OpenSS7 Project are the following former
subpackages of the OpenSS7 Master Package:8
• Linux Native Sockets SCTP
• Internet Performance (the OpenSS7 iperf fork)
• Network Performance (the OpenSS7 netperf fork)
• Dialogic Open System Release 6.1
This distribution is applicable to Linux 2.4, 2.6 and 3.x kernels as was targeted at
ix86, x86_64, ppc and ppc64 architectures, but should build and install
for other architectures as well.
Release
This is the openss7-1.1.7.20141001 package, released 2014-10-25. This
‘1.1.7.20141001’ release, and the latest version, can be obtained from the
download area of The
OpenSS7 Project website using a command such as:
The release is available as an autoconf(1) tarball, src.rpm or dsc, as a
set of binary rpms or debs, or as a yum(8), zypper(8) or
apt(8) repository. See the download page for
the autoconf(1) tarballs, src.rpms, dscs, or repository access instructions.
See the openss7 package
page for tarballs, source and binary packages.
Please see the
NEWS
file for release notes and history of user visible changes for the current version, and the
ChangeLog
file for a more detailed history of implementation changes. The
TODO
file lists features not yet implemented and other outstanding items.
When working from cvs(1) or git(1), please see the
README-cvs,
file (or
see Downloading from CVS).
An abbreviated installation procedure that works for most applications appears below.
This release of the package is published strictly under Version 3 of the Affero GNU Public
License which can be found in the file
COPYING.
Package specific licensing terms (if any) can be found in the file
LICENSES.
Please respect these licensing arrangements. If you are interested in different licensing terms,
please contact the copyright holder, or
OpenSS7 Corporation <sales@openss7.com>.
See
README-alpha
(if it exists) for alpha release information.
Repository Installation
The simplest way of installing the package is to use the OpenSS7 repomd or apt
repositories instead of attempting to build from tarball. When you already have a the repository
set up, the package can be udpated simply with (one of):
If you have not yet set up an installation source for the OpenSS7 repositories, one of the
following commands will establish repository access for RPM-based systems:
When building from source RPM or DSC, the prerequisites for building must be met. Most RPM or DEB
build prerequisites are automatic; however, some prerequisites must still be met manually. When
building from tarball, most prerequisites must be met manually. The configure script will
inform you of most missing prerequisites and the actions that must be performed to meet those
prerequisites.
Prerequisites for building OpenSS7 package are as follows:
Linux distribution, somewhat Linux Standards Base compliant, with a 2.4, 2.6 or 3.x
kernel and the appropriate tool chain for compiling out-of-tree kernel modules. Most recent
Linux distributions are usable out of the box, but some development packages must be
installed. For more information, see Compatibility.
-
A fairly LSB compliant GNU/Linux distribution.10
The package builds and installs kernel modules. When configuring and building the package, it is
necessary to have the kernel development package installed. For the following distributions, use
the following commands:
You also need the same version of gcc(1) compiler with which the kernel was built. If it
is not the default, add ‘CC=kgcc’ on the line after ‘./configure’, for example:
The package builds and installs SNMP agents. When configuring and building the package, it is
necessary to have the net-snmp development packages installed. For the following distributions, use
the following commands:
The package builds and installs Java archives and compiled Java. When configuring and building the
package, it is necessary to have the GNU GCJ Java Compiler front-end and GNU Classpath archives
installed. For the following distributions, use the following commands:
The following commands will download, configure, build, check, install, validate, uninstall and
remove the package:
$> wget http://www.openss7.org/tarballs/openss7-1.1.7.20141001.tar.xz
$> tar -xJvf openss7-1.1.7.20141001.tar.xz
$> mkdir build
$> pushd build
$> ../openss7-1.1.7.20141001/configure --enable-autotest --enable-silent-rules
$> make V=0
$> make check
$> sudo make install
$> sudo make installcheck
$> sudo make uninstall
$> popd
$> sudo rm -rf build
$> rm -rf openss7-1.1.7.20141001
$> rm -f openss7-1.1.7.20141001.tar.xz
If you have problems, try building with the logging targets instead. If the make of a logging
target fails, an automatic problem report will be generated that can be mailed to
The OpenSS7 Project.13 Installation steps using the logging targets proceed as follows:
$> wget http://www.openss7.org/tarballs/openss7-1.1.7.20141001.tar.xz
$> tar -xJvf openss7-1.1.7.20141001.tar.xz
$> mkdir build
$> pushd build
$> ../openss7-1.1.7.20141001/configure --enable-autotest --enable-silent-rules
$> make V=1 compile.log
$> make check.log
$> sudo make install.log
$> sudo make installcheck.log
$> sudo make uninstall.log
$> popd
$> sudo rm -rf build
$> rm -rf openss7-1.1.7.20141001
$> rm -f openss7-1.1.7.20141001.tar.xz
See
README-make
for additional specialized make targets.
The tarball will unpack into the relative subdirectory named after the package name:
openss7-1.1.7.20141001.
The package builds using the GNU autoconf utilities and the configure script. To
build the package, we recommend using a separate build directory as follows:
$> mkdir build
$> cd build
$> ../openss7-1.1.7.20141001/configure
In general, the package configures and builds without adding any special options to the
configure script. For general options to the configure script, see the GNU
INSTALL
file in the distribution:
$> less ../openss7-1.1.7.20141001/INSTALL
For specific options to the configure script, see the
INSTALL-openss7
file in
the distribution, or simply execute the configure script with the --help option like so:
$> ../openss7-1.1.7.20141001/configure --help
After configuring the package, the package can be compiled simply by issuing the ‘make’
command:
$> make V=0
Some specialized makefile targets exists, see the
README-make
file in the distribution or simply invoke the ‘help’ target like so:
$> make help | less
After successfully building the package, the package can be checked by invoking the ‘check’
make target like so:
$> make check
After successfully checking the package, the package can be installed by invoking the ‘install’
make target (as root) like so:
$> sudo make install
The info documentation is automatically installed; however, the text, html and pdf
documentation must be installed separately like so:
$> sudo make install-txt
$> sudo make install-html
$> sudo make install-pdf
The test suites that ship with the package can be invoked after the package has been installed by
invoking the ‘installcheck’ target. This target can either be invoked as root, or as a normal
user, like so:
$> make installcheck
(Note: you must add the --enable-autotest flag to configure, above for the
test suites to be invoked with ‘make installcheck’.)
The package can be cleanly removed (including installed documentation) by invoking the
‘uninstall’ target (as root):
$> sudo make uninstall
Then the build directory and tarball can be simply removed:
More detailed installation instructions can be found in the
Installation,
contained in the distribution in ‘text’, ‘info’, ‘html’ and ‘pdf’
formats:
$> cd ../openss7-1.1.7.20141001
$> less doc/manual/openss7.txt
$> lynx doc/manual/openss7.html
$> info doc/manual/openss7.info
$> xpdf doc/manual/openss7.pdf
The ‘text’ version of the manual is always available in the
MANUAL
file in the release.
The current manual is also always available online from The OpenSS7 Project website at:
This manual documents the design, implementation, installation, operation and future development
schedule of the OpenSS7 package.
1.1 Overview
This manual documents the design, implementation, installation, operation and future development of
the OpenSS7 package.
1.2 Organization of this Manual
This manual is organized (loosely) into several sections as follows:
Introduction.
This introduction
Objectives.
Objectives of the package
Reference.
Contents of the package
Development.
Developing with the package
Porting.
Porting to the package
Conformance.
Conformance of the package
Releases.
Releases of the package
Installation.
Installation of the package
Troubleshooting.
Troubleshooting of the package
1.3 Conventions and Definitions
This manual uses texinfo typographic conventions.
2 Objectives
2.1 Background
STREAMS derives from Dennis Ritchie’s original paper,14 was incorporated into the UNIX® System V Release 3 operating
system, replaced the terminal input-output subsystem, pipes and FIFOs in
UNIX® System V Release 4, and was improved in the USL release of
the UNIX® System V Release 4.2 operating system.
Today, STREAMS is a part of every major branded UNIX® variant,
such as
AIX®,
HP-UX®,
IRIX®,
MacOT®,
OSF/1®,
Solaris®,
SUPER-UX®,
UnixWare®,
UXP/V®,
and including many UNIX-like operating systems and popular embedded RTOS, but with
the notable exception of Berkeley System Distribution releases, variants and offshoots, and
Linux.
2.2 What is STREAMS?
STREAMS is a flexible framework for communication between a user level process and a kernel resident
driver. It encompasses a set of kernel system calls providing a user-kernel interface that is
backward compatible with the traditional character device driver interface, as well as a set of
STREAMS driver and module entry points forming a driver-kernel interface. STREAMS also provides a
rich set of kernel utility functions for the development and implementation of kernel-resident
drivers and modules. STREAMS prompted the specification of the DDI/DKI which is an architecture
independent driver-kernel interface that provides a standardized set of kernel functions (beyond
just STREAMS) for the development of device and software drivers.
STREAMS provides a reconfigurable full-duplex communications path between user level process and
kernel resident driver, termed a Stream. Modules can be inserted in the path between the user
and driver under user level control. Streams can be linked across multiplexers under user control
to form complex (yet reconfigurable) topologies of user level processes and drivers.
Communication of control and data information along a Stream is accomplished by message passing.
There is no direct function call interface between components of a Stream. A Stream exists within
the STREAMS framework inside the kernel and extend from the user-kernel interface to the kernel
driver interface. Each component of a Stream consists of a pair of queues used to pass messages in
the upstream direction to the kernel-user interface; or downstream, the kernel-driver interface.
At the kernel-user end of the Stream is a component called the Stream head. As with all
components of a Stream, the Stream head consists of a queue pair and a specialized set of
procedures. The Stream head procedures are responsible for converting between the system call
interface presented to users and the message passing mechanism within the Stream.
At the kernel-driver end of the Stream is the Stream end. The Stream end also contains a
queue pair and a set of procedures. The Stream end (or simply driver) procedures are responsible
for converting between the message passing mechanism within the Stream and the actions and events of
a hardware (or pseudo-) device.
Intermediate components within the Stream are called Modules. Modules consist of a queue pair
for passing messages upstream and downstream, as well as a set of procedures for processing
messages. Modules can be pushed onto the module stack between the Stream head and Stream end using
a set of standardized input-output control commands.
In support of topologies more complex than these simple linear segments, STREAMS also provides a
specialized Stream end (driver) called a Multiplexing driver. A Multiplexing driver has the
ability to open multiple Streams to its upper interface (multiplexer) as well as linking multiple
Streams beneath its lower interface (multiplexer). Again, a standardized set of input-output
controls provide the user with the ability to configure a Multiplexing driver.
2.3 Why STREAMS?
With the ability to open multiple Streams to a driver, push and pop modules to and from the module
stack on a Stream, and to link any Stream under a multiplexing driver–all under user control using
standardized input-output controls–allows STREAMS to configure complex topologies to form protocol
stacks.
Almost all specialized standard telecommunications software developed since 1990 was developed to
run on STREAMS. This is for several reasons:
Since 1990, STREAMS and the associated DDI/DKI has been, and remains, the only way to incorporate
OEM protocol stacks into mainstream UNIX® system kernels.
The original UNIX System Laboratories (later X/Open then later the OpenGroup)
support for ITU-T developed OSI protocols, makes STREAMS amenable to an open
model for development for ITU-T protocols. (ITU-T, formerly CCITT, is
the International Telecommunications Union – Telephone Sector responsible for international
telephone standards, and original developers of the OSI model.)
As a result, there is a significant body of commercial software implementing telecommunications
protocol stacks that was developed, tested, validated, conformance tested, field verified, to run on
STREAMS: and is still running on STREAMS.
The cost of reimplementation, retesting, revalidation, redoing conformance testing, and field
re-verification, would likely be prohibitive: after all, the point of Linux is reducing cost,
is it not?
2.4 Why STREAMS for Linux?
The Linux kernel was not developed with STREAMS in mind. For TPI/IP networking,
Linux originally followed in the footsteps of the BSD NET2 release. Currently, the
implementation of TCP/IP in the Linux kernel has long departed from the classical
BSD organization and exhibits characteristics unique to the GNU/Linux operating
system. For character device and terminal input-output, Linux follows closely the
SVR 3 pre-STREAMS approach to pipes, FIFOs and terminal subsystem. The terminal subsystem
implementation, too, has become unique to GNU/Linux.
Therefore, from the perspective of TCP/IP networking and Terminal I/O, there
would be little reason to provide STREAMS for Linux. That is, if it were not for the body of
software supporting OSI and telecommunications protocols based solely on STREAMS, for
which Linux has little or no support.
So, the answer to the question, "Why STREAMS for Linux?" is: so that a GNU/Linux platform
can enjoy the same wealth of telecommunications and OSI protocol stacks otherwise only
available to big-iron UNIX®. Without STREAMS, Linux is probably
just another BSD, and probably not a very good one.
2.5 History of STREAMS for Linux
In 2000,
The OpenSS7 Project abandoned using the Linux networking
model for implementation of the Signalling System No. 7 protocol (primarily due to the lack of
support for the full BSD networking model under Linux) and switched to using
STREAMS as the basis for all future development.
Over the span of the next 5 years, (and not surprisingly given the body
of software), almost all Signalling System No. 7 products released on Linux used
STREAMS.
In 2005,
The OpenSS7 Project release (after two years of development) the
streams-0.7a.4 package: a reimplementation of SVR 4.2 STREAMS with compatibility
modules for all major UNIX® releases, called OpenSS7.
OpenSS7 was intended as a POSIX/SUSv3 XSR conforming, high performance,
production grade, implementation, suitable for mainline Linux adoption, and a
better foundation on which to base SIGTRAN, VoIP, ISDN and
SS7 protocol stacks developed under the The OpenSS7
Project, as well as a better foundation for porting commercial UNIX®
OEM implementations to Linux. It is the openss7-1.1.7.20141001
package that contains the documentation you are reading now.
2.6 Why Fast?
In late 2003,
The OpenSS7 Project decided to begin implementation of a
production grade implementation of STREAMS, because of a number of shortcomings of other
Linux STREAMS implementations:
proprietary;
unsuitable for mainline kernel adoption due to coding style or organization;
poorly adapted to distribution production kernels;
is unsuitable for packaging or repeatability;
portability objective unsuitable for mainline kernel adoption;
ports from the same baseline obfuscate the code;
poor performance due to portability or coding style;
code bloat or over sized memory footprint;
redundant debug statements obscuring defects or obfuscating code;
overuse of semaphores;
contain serious races or not suitable for threaded applications;
non-conformance to mainstream UNIX® implementations;
non-conformance to POSIX or any release of the Single UNIX Specification;
limited set of standard drivers or modules;
limited set of diagnostic or administrative utilities;
limited test programs;
poorly documented.
The replacement, named OpenSS7, was to correct all of these difficulties, and,
by the initial ‘streams-0.7a.4’ release, was:
open source;
completely Lindented and follows kernel coding practises;
automatically adapts to production kernels with autoconf;
packages itself into LSB compliant RPMs and DEBs;
designed and implemented specifically for GNU/Linux;
no ports considered;
over twice the performance;
less than one-eighth of the memory footprint;
proper programming by assertion;
proper use of lightweight spin locks;
race free locking strategies and synchronization;
compatible with all mainstream UNIX® implementations;
conforms to POSIX/SUSv3 XSR;
complete set of standard drivers and modules;
complete set of diagnostic and administrative utilities;
integrated set of conformance test suites;
fully documented.
3 Reference
3.1 Files
The following kernel modules are installed by OpenSS7 in the
/lib/modules/3.0.99-1-unx/openss7/directory, with either a ‘.o’ or ‘.ko’ extension.
15
specfs
This kernel module contains the STREAMS Special Shadow Filesystem.
See specfs(5) for more information.
streams
This kernel module contains the STREAMS scheduler, utility functions, and STREAMS Device
Driver Interface/Driver Kernel Interface (DDI/DKI).
See STREAMS(9) for more information.
streams-fifo
This kernel module contains the fifo STREAMS driver.
This is a standard STREAMS driver, but is also used by the conformance and validation test suite.
See fifo(4s) for more information.
streams-sad
This kernel module contains the sad STREAMS driver.
This is the standard STREAMS Administrative Driver.
See sad(4) for more information.
streams-nsdev
This kernel module contains the nsdev STREAMS driver.
This is a OpenSS7 specific driver.
See nsdev(4) for more information.
streams-echo
This kernel module contains the echo STREAMS driver.
This is a standard STREAMS driver, but is also used by the conformance and validation test suite.
See echo(4) for more information.
streams-mux
This kernel module contains the mux STREAMS driver.
This is a standard STREAMS driver< but is also used by the conformance and validation test suite.
See mux(4) for more information.
streams-nuls
This kernel module contains the nuls STREAMS driver.
This is a standard STREAMS module.
See nuls(4) for more information.
streams-pipe
This kernel module contains the pipe STREAMS driver.
This is a standard STREAMS driver.
See pipe(4) for more information.
streams-log
This kernel module contains the log STREAMS driver.
This is a standard STREAMS driver.
See log(4) for more information.
streams-loop
This kernel module contains the loop STREAMS driver.
This is a standard STREAMS driver, but is also used by the conformance and validation test suite.
See loop(4) for more information.
streams-sfx
This kernel module contains the sfx STREAMS driver.
This is a common character device driver for implementing STREAMS FIFOs.
See sfx(4) for more information.
streams-spx
This kernel module contains the spx STREAMS driver.
This is a common character device driver for implementing STREAMS pipes.
See spx(4) for more information.
streams-srvmod
This kernel module contains the srvmod STREAMS module. The srvmod STREAMS
module is a simple buffer module (a module that always defers to its service procedure and then
passes any message along). This module is used for performance testing of the STREAMS
package.
See srvmod(4) for more information.
streams-nullmod
This kernel module contains the nullmod STREAMS module. The nullmod
STREAMS module is a simple null module (a module that always passes messages to the next
module in along the Stream). This module is used for performance testing of the STREAMS
package and is also used by the conformance and validation test suite.
See nullmod(4) for more information.
streams-pipemod
This kernel module contains the pipemod STREAMS module.
This is a standard STREAMS module used with pipes.
See pipemod(4) for more information.
streams-connld
This kernel module contains the connld STREAMS module.
This is a standard STREAMS module.
See connld(4) for more information.
streams-sc
This kernel module contains the sc STREAMS module.
This is a common STREAMS Configuration module.
See sc(4) for more information.
streams-testmod
This kernel module contains the testmod STREAMS module.
This is a OpenSS7 specific test module that is used for conformance and validation
testing of STREAMS.
See testmod(4) for more information.
Additional kernel modules are provided by add-on packages.
3.2 Drivers
The configuration of STREAMS drivers and modules is performed when compiling the
OpenSS7 subsystem. The STREAMS subsystem, core drivers and modules are
part of every OpenSS7 system.
The following lists the core drivers and modules, STREAMS kernel tunable parameters, and
STREAMS configuration information:16
Clone device driver.
This is a standard SVR 4.2 STREAMS driver.
The clone(4) driver is a integral part of STREAMS and is used to create clone
instances of a STREAMS driver.
Echo (loopback) device driver.
This is a commonly implemented STREAMS driver. It is implemented by HP-UX® and
OSF/1®. The echo(4) driver provides a simple FIFO-like device without full
POSIX FIFO semantics. Its primary purpose is for the STREAMS Verification function,
strvf(8), and the test-streams(8) validation test suite.
FIFO (Named Pipe) device driver.
This is a standard SVR 4.2 STREAMS driver.
The fifo(4s) driver provides POSIX-compliant STREAMS-based FIFO device.
Not all implementations of STREAMS provide STREAMS-based FIFOs: some
implementations use the older SVR 3-style FIFOs that are not STREAMS-based.
OpenSS7 provides STREAMS-based FIFOs with the fifo(4s)
driver.
STREAMS log driver.
This is a standard SVR 4.2 STREAMS driver.
The log(4) driver provides a STREAMS capable logger in addition to the BSD
logger present in Linux. The log(4) driver provides additional support for
STREAMS modules and drivers using the strlog(9) kernel level utility.
OpenSS7 also provides the strace(8), strerr(8) and
strclean(8) administrative utility functions and startup scripts for controlling the
log(4) driver.
Loop device driver.
This is a standard SVR 4.2 STREAMS driver.
The loop driver is detailed in the UNIX System V Release 4 Programmer’s Manual – STREAMS.
The loop(4) driver provides capabilities used primarily for validation test programs (see
test-streams(8)) as well as serving as an example driver.
Multiplexing driver.
This is a standard SVR 4.2 STREAMS driver.
The mux driver is detailed in the UNIX System V Release 4 Programmer’s Manual – STREAMS.
The mux(4) driver provides capabilities used primarily for validation test programs (see
test-streams(8) as well as serving as an example multiplexing driver. This
mux(4) driver also provides the minimux capabilities.
Named STREAMS device driver.
This is a OpenSS7 specific driver.
The nsdev(4) driver is a clone(4)-like driver that permits the specification of
major and minor device numbers using the device node name. It provides one of three mechanisms
under OpenSS7 that remove STREAMS driver dependency on statically
allocated device numbers.
Null Stream driver.
This is a standard SVR 4.2 STREAMS driver.
The nuls(4) driver is usually called ‘null’. Linux has its own
SVR3-style /dev/null driver, so it was renamed to ‘nuls’.
STREAMS-based pipe driver.
This is a standard SVR 4.2 STREAMS driver.
However, pipe(4) is not normally implemented as a STREAMS driver, but is implemented
as a system call. OpenSS7 provides pipe(2s) system call emulation
which invokes this driver internal to the kernel.
STREAMS Administrative Driver.
This is a standard SVR 4.2 STREAMS driver.
The sad(4) driver is used by the autopush(8) utility to examine and specify the
autopush lists for STREAMS drivers. Also, it is used to examine and verify the present of
STREAMS modules or drivers in the system.
STREAMS FIFO device driver.
This is commonly implemented STREAMS driver that is used to implement STREAMS FIFOs
(Named Pipes) using a regular character device.
The sfx(4) driver provides a character based device approach to creating FIFOs.
STREAMS pipe device driver.
This is commonly implemented STREAMS driver that is used to implement STREAMS pipes
using a regular character device.
The spx(4) driver provides a character based device approach to creating FIFOs and pipes.
Only UnixWare® and AIX(4) document this device.
Additional drivers are provided by add-on packages.
3.3 Modules
The configuration of STREAMS drivers and modules is performed when compiling the
OpenSS7 subsystem. The STREAMS subsystem, core drivers and modules are
part of every OpenSS7 system.
The following lists the core drivers and modules, STREAMS kernel tunable parameters, and
STREAMS configuration information:17
Pipe module.
This is a standard SVR 4.2 STREAMS module.
The pipemod(4) module can be pushed over a pipe end or FIFO before other modules are
pushed (on either end) to reverse the sense of the M_FLUSH(9) message that traverse the
pipe.
Connection Line Discipline module.
This is a standard SVR 4.2 STREAMS module.
The connld(4) module can be pushed over a pipe end that has been attached to a file system
file using fattach(3) and will then create a new pipe instance on each open(2s)
of the attached file and pass the new remove file pointer to the remove end using
M_PASSFP(9) to be received with I_RECVFD(7). This allows servers to be created
that use pipe(4)s for communication.
STREAMS Configuration module.
This is a commonly implemented STREAMS module.
It is implemented by HP-UX and AIX, and perhaps other Mentat-derived
STREAMS implementations.
The sc(4) modules provides the ability to access STREAMS driver information by name
rather than major device number. It also provides access to the module_info(9) and
module_stat(9) structure information for the named STREAMS module or driver, not
accessible using the sad(4) driver. The sc(4) module is used by the
scls(8) utility.
Buffer module.
This is a standard SVR 4.2 STREAMS module described in the UNIX System V Release 4
Programmer’s Manual – STREAMS.
The srvmod(4) module also has OpenSS7 specific extensions.
The srvmod(4) module is used by the perftest(8) performance test program to test
the effect of additional levels of service procedure pushed over a Stream.
The module also serves as an example of a STREAMS module using service procedures.
Null module.
This is a standard SVR 4.2 STREAMS module described in the UNIX System V Release 4
Programmer’s Manual – STREAMS.
The nullmod(4) module also has OpenSS7 specific extensions.
The nullmod(4) module is used by the perftest(8) performance test program to test
the effect of additional levels of put procedure pushed over a Stream.
The module also serves as an example of a STREAMS module not using service procedures.
Test module.
This is a OpenSS7 specific STREAMS module.
The primary purpose of the testmod(4) modules is to provide the test-streams(8)
validation test program with the capability to pass specific M_ERROR(9) and
M_HANGUP(9) messages to the Stream head for POSIX validation testing.
It also serves as an example of how a STREAMS module can properly process M_IOCTL(9)
and related messages.
Additional modules are provided by add-on packages.
3.4 Libraries
During the installation process of OpenSS7 a subroutine library is built and
installed on your system. For 64-bit systems that support 32-bit compatibility, two versions of
each library are built and installed: one 64-bit native library and one 32-bit compatibility
library. 64-bit native libraries are installed to the /usr/lib64 subdirectory. 32-bit
native and 32-bit compatibility libraries are installed to the /usr/lib subdirectory.
libstreams.so.0.0.1
libstreams.so.0
libstreams.so
Provides a shared object library for use by STREAMS applications programs.
libstreams.a
Provides a static library for use by STREAMS applications programs.
libstreams.la
Provides the libtool definitions for the library.
3.4.1 libstreams Library Routines
The following routines are present in the libstreams libraries. The routines in these
libraries are standard STREAMS interface system calls documented in the System V Release
4.2 Programmer’s Manual – STREAMS. Refer to the associated manual pages for detailed information
on these routines.
To use one of the OpenSS7 libraries you can include the file
sys/stropts.h in you application program source code. On you compiler command line, add the
option ‘-I/usr/include/openss7’ to include the version of sys/stropts.h that is
distributed with OpenSS7.
When linking our program, or performing a final gcc to build your executable, include one
of the following options on your command line:
‘/usr/lib/libstreams.a’
‘-lstreams -static’
Link against the static version of the library.
‘-lstreams’
Link against the shared object version of the library.
‘/usr/lib/libstreams.la’
Use with libtool to link additional convenience libraries against the shared or static
versions of the library.
Failure to link the executable runtime path for libstreams will result in linker-loader
warnings that the functions getpmsg(2s) or putpmsg(2s) are not implemented and
will always fail.18.
System V Init Script for the STREAMS Special Shadow Filesystem.
The specfs(8) init script provides the ability to initialize, configure and mount the
STREAMS Special Shadow Filesystem, specfs(5).
The specfs(8) script provides the RedHat-style init script, whereas the
specfs.sh(8) script provides the Debian-style init script.
System V Init Script for the STREAMS Subsystem.
The streams(8) init script provides the ability to initialize, configure and mount the
STREAMS subsystem, STREAMS(9).
The streams(8) script provides the RedHat-style init script, whereas the
streams.sh(8) script provides the Debian-style init script.
Change Stream configuration.
strchg(1) is a standard SVR 4.2 STREAMS user utility.
strchg(1) is a C-language user program that can be used to alter the configuration of the
Stream associated with the caller’s standard input. The strchg(1) command pushes
modules on the Stream, pops modules off of the Stream, or both. Only the superuser or
owner of the STREAMS device can alter the configuration of that Stream. If another user
attempts to alter the configuration, the strconf(1) command will fail.
strchg(1) is useful from the shell and, when standard input is redirected from an open
file descriptor to the command, can be used to push and pop modules from arbitrary Streams,
not just those associated with STREAMS-based terminal devices.
Query Stream configuration.
strconf(1) is a standard SVR 4.2 STREAMS user utility.
strconf(1) is a C-language user program that can be used to query the configuration of a
Stream. When use without any options, it prints a list of the modules in the Stream
associated with the standard input, as well as the topmost driver. The list is printed with one
name per line, where the first name printed is the topmost module on the Stream and the last
item printed is the name of the topmost driver associated with the Stream.
strconf(1) is useful from the shell and, when standard input is redirected from an open
file descriptor to the command, can be used to query arbitrary Streams, not just the
associated with STREAMS-based terminal devices.
Reset a Stream.
strreset(1) is a standard SVR 4.2 STREAMS user utility.
strreset(1)is a C-language user program that resets an open Stream by generating an
M_FLUSH(9) message to the Stream head. It is used mainly to reset blocked
Streams. Wehn it is impossible to reopen the Stream, issue an I_FLUSH or
equivalent command. This situation may happen with a process sleeping in a module’s close routine,
when signals can not be sent to the process (a zombie process exiting, for example).
Control the autopush module list for a STREAMS device.
autopush(8) is a standard SVR 4.2 STREAMS administrative utility.
autopush(8) is a C-language program that can be used to manipulate and examine which
STREAMS modules are automatically pushed over a device when it is opened. It is also possible
to restrict the ability to push further modules on the Stream without proper privilege.
The autopush(8) utility provides a user program interface to the STREAMS
Administrative Driver (sad(4)).
Name a STREAMS file.
fattach(8) is an OpenSS7 utility. Although OSF/1 documentation mentions an
fattach manual page in section 8, one does not exist.
fattach(8) opens a pipe(4) and attaches one end of the pipe to a file using
fattach(3), and optionally pushes the connld(4) module on the side of the pipe
being attached to the file. The other end of the pipe remains available for use by the shell
program invoking this command.
fattach(8) provides a easy way for shell programs to use STREAMS-based pipes and to
use the facilities of the connld(4) module.
fdetach(8) is a standard SVR 4.2 STREAMS administrative utility.
fdetach(8) is a C-language program that detaches or disassociates a file descriptor for an
open STREAMS device or pipe from its filename in the file system.
Install special files.
insf(8) is the HP-UX way to install special (device) files. This program is not
even partially implemented in OpenSS7. Use streams_mknod(8) and
friends instead.
List STREAMS configuration.
scls(8) is a rather useful AIX administrative utility that is also implemented by
OpenSS7.
scls(8) is a C-language program that can be used to list module and driver names as well
as information and statistics associated with those modules or drivers.
The scls(8) utility provides a user program interface to the STREAMS Configuration
module (sc(4)).
Write STREAMS event trace messages to the standard output.
strace(8) is a standard SVR 4.2 STREAMS administrative utility.
The strace(8) C-language program receives trace event messages from the STREAMS log
driver (log(4)) and writes these messages to the standard output. When run as a daemon,
strace(8) appends these messages to a log file.
Messages that appear in the trace log are intended to report debugging information that assists with
troubleshooting a running STREAMS module or driver.
Make special device nodes for STREAMS.
streams_mknod(8) is a OpenSS7 specific administrative utility.
The streams_mknod(8) C-language program can be used to make (or remove) the special
device nodes under the /dev directory required by openss7-1.1.7.20141001
package modules and drivers. streams_mknod(8) in invoked by the System V startup script,
/etc/init.d/openss7.
Receive error log messages from the STREAMS log(4) driver.
strerr(8) is a standard SVR 4.2 STREAMS administrative utility.
The strerr(8) utility is a C-language program, run as a daemon, that receives error log
messages from the STREAMS log driver (log(4)) and writes these message to a log
file. By default, strerr(8) logs all STREAM error messages from all drivers and
modules.
Messages that appear in the error log are intended to report exceptional conditions that require the
attention of the person who administers your system.
List Stream information.
strinfo(8) is a rather useful AIX administrative utility that is also implemented by
OpenSS7.
The strinfo(8) C-language program can be used to list Stream instance information as
well as information and statistics on a module or driver basis.
The scls(8) utility provides a user program interface to the STREAMS Configuration
module (sc(4)).
This program is not even partially implemented in OpenSS7 yet. User
proc(5) file system and the /proc/streams directory instead. Also, see
scls(8) for driver and module specific information.
The test-streams(8) C-language program is a conformance and validation test program, in the
OpenSS7 Project style, for the
STREAMS(9) subsystem and primarily the sth(4)Stream head.
For the proper way to execute these validation test programs in a conformance and validation test
suite, see Running Test Suites.
4 Development
For development using the OpenSS7 package, See About
This Manual in STREAMS Programmer’s Guide.
4.1 Header Files
Header files are installed, typically, in the /usr/include/openss7 subdirectory. To
use the header files from the package, ‘-I/usr/include/openss7’ must be included in the
gcc command line as a compile option. This is true regardless of whether user space or
kernel space programs are being compiled.
In general, ‘-I’ include directives on the gcc command line should be ordered in the
reverse order of the dependencies between packages. So, for example, if the include files from all
add-on packages are required, the order of these directives would be: ‘-I/usr/include/strss7
-I/usr/include/strsctp -I/usr/include/strinet -I/usr/include/strxnet -I/usr/include/strxns
-I/usr/include/strcompat -I/usr/include/streams’.
Following are the user visible header files provided by the
openss7-1.1.7.20141001 package in directory /usr/include/streams:
strlog.h
This is the primary header file for the strlog(4) driver.
It is normally only included by user space programs when interacting with the log(4) driver.
See log(4) for more information.
stropts.h
This is the primary user header file for the Stream head.
It is normally only included by user space programs when interacting with the Stream head.
See sth(4) for more information.
log.h
This is the primary header file for the log(4) driver.
It is normally only included by user space programs when interacting with the log(4) driver.
See log(4) for more information.
loop.h
This is the primary header file for the loop(4) driver.
It is normally only included by user space programs when interacting with the loop(4) driver.
See loop(4) for more information.
sad.h
This is the primary header file for the sad(4) driver.
It is normally only included by user space programs when interacting with the sad(4) driver.
See sad(4) for more information.
sys/cmn_err.h
This is the system specific kernel header file for the cmn_err(9) utility.
sys/ddi.h
This is the system specific kernel header file for various STREAMS DDI(9) utilities.
It is normal only included by kernel space STREAMS modules and drivers.
See DDI(9) for more information.
sys/debug.h
This is the system specific kernel header file for kernel debugging macros.
It is normal only included by kernel space STREAMS modules and drivers.
sys/dki.h
This is the system specific kernel header file for various STREAMS DKI(9) utilities.
It is normal only included by kernel space STREAMS modules and drivers.
See DKI(9) for more information.
sys/kmem.h
This is the system specific kernel header file for kmem_alloc(9) and related utilities.
It is normal only included by kernel space STREAMS modules and drivers.
See kmem_alloc(9) for more information.
sys/strconf.h
This is the system specific kernel header file for STREAMS driver and module configuration.
It is normal only included by kernel space STREAMS modules and drivers.
sys/strdebug.h
This is the system specific kernel header file for STREAMS driver and module debugging macros.
It is normal only included by kernel space STREAMS modules and drivers.
sys/stream.h
This is the system specific kernel header file for STREAMS drivers and modules.
It is normal only included by kernel space STREAMS modules and drivers.
See STREAMS(9) for more information.
sys/strlog.h
This is the system specific header file for the strlog(4) and strlog(9) facilities.
It is normally only included by kernel space programs when interacting with the log(4) driver.
See log(4) for more information.
sys/stropts.h
This is the system specific user header file for the Stream head.
It is normally only included by user space programs when interacting with the Stream head.
See sth(4) for more information.
sys/stropts32.h
This is the system specific user 32/64-bit header file for the Stream head.
It is normally only included by user space programs when interacting with the Stream head.
See sth(4) for more information.
sys/strsubr.h
This is the system specific kernel header file for STREAMS private definitions.
It is normal only included by kernel space STREAMS modules and drivers.
See STREAMS(9) for more information.
sys/log.h
This is the system specific header file for the log(4) driver.
It is normally only included by kernel space programs when interacting with the log(4) driver.
See log(4) for more information.
sys/loop.h
This is the system specific header file for the loop(4) driver.
It is normally only included by kernel space programs when interacting with the loop(4) driver.
See loop(4) for more information.
sys/sad.h
This is the system specific header file for the sad(4) driver.
It is normally only included by kernel space programs when interacting with the sad(4) driver.
See sad(4) for more information.
sys/sc.h
This is the system specific header file for the sc(4) module.
It is normally only included by user or kernel space programs when interacting with the sc(4) driver.
See sc(4) for more information.
sys/testmod.h
This is the system specific header file for the testmod(4) module.
It is normally only included by user or kernel space programs when interacting with the testmod(4) driver.
See testmod(4) for more information.
4.1.1 User Space Programs
Typical include files for interacting with STREAMS from user space include the
stropts.h header file. Additional header files for interacting with specific drivers or
modules may also be required.
4.1.2 Kernel Space Drivers and Modules
Typical include files for writing STREAMS modules and drivers for kernel space include the
sys/cmn_err.h, sys/kmem.h, sys/dki.h, sys/stream.h, sys/ddi.h,
and sys/strconf.h header files. Additional header files for interacting with specific
drivers or modules may also be required.
4.2 Libraries
Shared or static versions of the libstreams library must be linked when using the
openss7-1.1.7.20141001 package. This library must either be specified on the
gcc command line as a shared library (e.g. ‘-lstreams’) or as a static library (e.g.
‘/usr/lib/libstreams.a’).
If the shared library is linked, include the following options on the gcc command line:
‘-lstreams’
Link to the /usr/lib/libstreams.so shared library.
If the static library is linked, include the following options on the gcc command line:
‘/usr/lib/libstreams.a’
Link to the /usr/lib/libstreams.a static library.
4.3 Kernel Modules
Developing STREAMS kernel modules is similar to user space programs with regard to header
files. /usr/include/openss7 should be placed as an include directory to search in
the gcc command line. The rules for compiling Linux kernel modules should be
followed. In particular, several important intricacies should be considered:
The gcc compiler used to compile the kernel modules must be the same version of compiler
that was used to compile the kernel.
The gcc command line must have the same compile flags that were used to compile the
kernel.
The gcc command line must define several important kernel defines including
‘-DLINUX’, ‘-D__KERNEL__’, as well as the base name of the module.
The gcc command line must include several important include files directly on the command
line such as ‘--include /lib/modules/3.0.99-1-unx/build/include/linux/autoconf.h’ and
maybe even ‘--include
/lib/modules/3.0.99-1-unx/build/include/linux/modversions.h’.19
4.4 Manual Pages
The openss7-1.1.7.20141001 package installs a number of manual pages in the
/usr/share/man directory as follows:
The following manual pages are installed in Section 1 of the manual (in the subdirectory /usr/share/man/man1):
calculate the size of message blocks in a STREAMS message.
5 Porting
OpenSS7 provides a rich set of STREAMS functions, DDI/DKI functions and
utilities based on SVR 4.2 MP for the development of STREAMS modules and drivers.
Although these functions and capabilities provide all of the utilities necessary for the development
of STREAMS modules and drivers, it represents the common set of functions provided by other
STREAMS implementations.
Some other STREAMS implementations provide interfaces, utilities and helper functions specific
to those implementations. Where STREAMS implementations differ the most is in the manner in
which they configure and register STREAMS drivers and modules for interface to the operating
system, including registration functions, device numbering, creation of minor device nodes,
administration and other mechanisms not specified by the System V Release 4 Programmer’s Guide
– STREAMS.
To assist with porting of STREAMS drivers and modules from other STREAMS implementations
and UNIX based operating systems to OpenSS7,
OpenSS7 provides a separate STREAMS Compatibility add-on package,
called strcompat-0.9.2.7,20 that provide source level compatibility
with a wide range of mainstream STREAMS implementations and significant groups of
compatibility and helper functions (such as those from Solaris and Mentat). These
compatibility packages also provide separate demand loadable kernel modules that provide the
additional compatibility functionality with OpenSS7.
In general, when porting to OpenSS7 from another STREAMS implementation,
the following items will need the most attention:
Header Files
The STREAMS and operating system specific header files that must be included by kernel modules
to implement STREAMS drivers or modules are specific to each STREAMS implementation.
Although there are some basic header files to include (sys/stream.h, sys/strconf.h,
sys/ddi.h, sys/cmn_err.h, sys/dki.h, sys/kmem.h), the order in which
these headers are included and the additional operating system specific headers are implementation
specific. See the example drivers and modules for the header files that are necessary for
OpenSS7 STREAMS modules and drivers.
Kernel Module Mechanism
The mechanism for creating, configuring and loading kernel modules is specific to the operating
system implementation. OpenSS7 uses the normal Linux mechanisms for
kernel modules also for STREAMS drivers and modules.
Any of the non-STREAMS DDI/DKI facilities or operating system specific facilities that are
used by the STREAMS driver or module may need to be replaced with the Linux equivalent.
Examples of such facilities include basic locks, read-write locks, semaphores and mutexes, atomic
integers, interrupt suppression, bus access and memory mapping functions.
Binary Modules
When STREAMS drivers or modules are released as binary objects and source code is not
available, it is still possible to convert the binary module for use with
OpenSS7. The facility to convert binary modules for use with
OpenSS7 is not, however, part of the base package and is not part of the
STREAMS Compatibility package. A separate add-on package, the Binary Compatibility
Modules package, strbcm-0.9.2.5 was developed explicitly for this
purpose.21
5.1 Porting from SVR 4.2 MP
When porting from SVR 4.2 MP or a STREAMS implementation based closely on SVR 4.2
MP, such as SUPER-UX, UXP/V, IRIX or many of the real-time operating system
implementations (e.g. VxWorks), it is possible to port directly to
OpenSS7 without using the STREAMS Compatibility package. Event when
porting from AIX, HP-UX and OSF/1 it is possible to avoid using the
compatibility package.
Most pseudo-device drivers and modules should not require any special facilities beyond basic locks
and porting may be straightforward. Where extensive implementation specific DDI/DKI or operating
system functions are required, it is better to use the STREAMS Compatibility package and
modules closest to the specific implementation being ported from.
5.2 Porting from Solaris
When porting from Solaris there are both STREAMS facilities and extensive DDI/DKI
facilities that differ greatly from basic SVR 4.2 MP STREAMS and DDI/DKI functions.
For porting all but the most trivial of STREAMS drivers and modules written specifically for
Solaris, it is better to use the STREAMS Compatibility package and the Solaris
compatibility module provided by that package.22
5.3 Porting from UnixWare
When porting from UnixWare there are extensive operating system facilities that differ
greatly from basic Linux facilities. For the most part these are basic locks, read-write
locks, condition variables, sleep locks, atomic integers, bus access and mapping functions.
Although Linux provides equivalents in most of these categories, the STREAMS
Compatibility package contains a compatibility module for UnixWare that provides source
compatibility with most of these functions. It is recommended that all but the most trivial of
UnixWare drivers and modules use the STREAMS Compatibility package when porting.
5.4 Porting from Mentat
When porting a STREAMS driver or module from a Mentat implementation (such as
AIX, HP-UX, OSF/1, Mac OT) that makes heavy use of the Mentat
‘mi_’ or ‘mps_’ helper functions, it is best to use the OpenSS7 implementations of those
functions available in the STREAMS Compatibility package directly. The STREAMS
Compatibility package provides a Mentat Portable STREAMS compatibility module that provides
implementations of the Mentat functions found in AIX, OSF/1 and Mac
OT.23
6 Conformance
6.1 Standards Compliance
OpenSS7 was designed and implemented to be compliant with as many standards
impinging on STREAMS as possible. There are three areas of standards compliance as follows:
6.1.1 User Interface Compliance
The STREAMS user interface standards are primarily specified by the IEEE and
OpenGroup standards and take the form of the POSIX 2003 and Single UNIX
Specification standards simultaneously released by the OpenGroup in conjunction with
IEEE. The latest POSIX/IEEE/OpenGroup standard provide an XSI extension that
includes the STREAMS user interface. For the most part, the OpenGroup XSI interface is
completely compatible with the user interface described in the System V Release 4
Programmer’s Manual – STREAMS, and where it does not, Stream head options are provided to select
between the default OpenGroup XSI behaviour and the traditional SVR 4 behaviour.
Most of the XSI specifications of the OpenGroup describe the behaviour of the Stream head and
the behaviour of specific STREAMS drivers or modules (such as pipes, FIFOs and terminals).
Also described is the poll(2s) behaviour, generation of signals, and read(2s) and
write(2s) behaviour as it applies to STREAMS character special devices.
User interface compliance of the OpenSS7 is tested with custom validation test
suites that ship with the package. See Conformance Test Programs for more information on
conformance and validation test suites.
6.1.2 Service Interface Compliance
The OpenGroup (now and in previous incarnations) have issued standardized service interface
specifications as part of the Common Application Environment (CAE) specifications. These service
interface specifications usually concern networking interfaces such as the Data Link Provider
Interface (DLPI), the Network Provider Interface (NPI), the Transport Provider
Interface (TPI), the X/Open Transport Interface (XTI) and the Sockets API. Although
these standards impinge upon various networking add-on packages for OpenSS7,
they do not impinge upon the base STREAMS package documented here. See the Installation
and Reference Manual for the appropriate add-on package.
6.1.3 Kernel Interface Compliance
The STREAMS kernel interfaces, DDI/DKI and other facilities available to the STREAMS
driver or module writer has not been subjected to formal standardization. For the most part, the
descriptions that are present in the System V Programmer’s Manual – STREAMS provide the most
definitive ipso facto standard for STREAMS implementation. In addition to this, some
STREAMS implementations have provided some enhancements or restrictions over the SVR 4
descriptions. Perhaps the most extensive embellishments have been provided for the Solaris
implementation of STREAMS.
OpenSS7 has been implemented to provide maximum compatibility over a wide range
of STREAMS implementations based on SVR 4 and provides additional capabilities similar
to those specific embellishments found in implementations such as Solaris through an add-on
STREAMS Compatibility package.
The most delicate areas of compatibility across STREAMS implementations regard, not the use of
STREAMS or DDI/DKI functions from within the STREAMS environment, but the invocation of
STREAMS functions from outside the STREAMS environment. In particular, use of private
locks and synchronization in the face of interrupts and external asynchronous callbacks is where
implementations deviate the greatest. OpenSS7 attempts to address these
differences by providing a greater level of assurance and wider range of calling contexts for each
of the STREAMS facilities.
Kernel interface compliance of the OpenSS7 to SVR 4 specifications is
tested with custom validation test suites, test modules and test drivers that ship with the package.
See Conformance Test Programs for more information on conformance and validation test
suites.
6.2 STREAMS Compatibility
OpenSS7 provides a high degree of compatibility with other STREAMS
implementation as listed below. Through the separate add-on STREAMS Compatibility package,
source level compatibility is also provided.
— SVR 3.2
OpenSS7 provides a degree of operational compatibility with
SVR 3.2
to ease portability and common comprehension. Specific kernel utilities are provided by the
STREAMS Compatibility package to provide full source level compatibility with
SVR 3.2.
— SVR 4.2 ES/MP
OpenSS7 provides a high degree of operational compatibility with
SVR 4.2 ES/MP
to ease portability and common comprehension. Specific kernel utilities are provided by the
STREAMS Compatibility package to provide full source level compatibility with
SVR 4.2 ES/MP.
— Mentat Portable STREAMS
OpenSS7 provides a high degree of operational compatibility with
Mentat Portable STREAMS
to ease portability and common comprehension. Specific kernel utilities are provided by the
STREAMS Compatibility package to provide full source level compatibility with
Mentat Portable STREAMS.
— AIX 5L Version 5.1
OpenSS7 provides a high degree of operational compatibility with
AIX 5L Version 5.1
to ease portability and common comprehension. Specific kernel utilities are provided by the
STREAMS Compatibility package to provide full source level compatibility with
AIX 5L Version 5.1.
— HP-UX 11.0i v2
OpenSS7 provides a high degree of operational compatibility with
HP-UX 11.0i v2
to ease portability and common comprehension. Specific kernel utilities are provided by the
STREAMS Compatibility package to provide full source level compatibility with
HP-UX 11.0i v2.
— OSF/1 1.2/Digital UNIX/True 64
OpenSS7 provides a high degree of operational compatibility with
OSF/1 1.2/Digital UNIX
to ease portability and common comprehension.
— UnixWare 7.1.3 (OpenUnix 8)
OpenSS7 provides a high degree of operational compatibility with
UnixWare 7.1.3 (OpenUnix 8)
to ease portability and common comprehension. Specific kernel utilities are provided by the
STREAMS Compatibility package to provide full source level compatibility with
UnixWare 7.1.3 (OpenUnix 8).
— Solaris 9/SunOS 5.9
OpenSS7 provides a high degree of operational compatibility with
Solaris 9/SunOS 5.9
to ease portability and common comprehension. Specific kernel utilities are provided by the
STREAMS Compatibility package to provide full source level compatibility with
Solaris 9/SunOS 5.9.
— IRIX 6.5.17
OpenSS7 provides a high degree of operational compatibility with
IRIX 6.5.17
to ease portability and common comprehension. Specific kernel utilities are provided by the
STREAMS Compatibility package to provide full source level compatibility with
IRIX 6.5.17.
— Mac OS 9 Open Transport
OpenSS7 provides a high degree of operational compatibility with
Mac OS 9 Open Transport
to ease portability and common comprehension. Specific kernel utilities are provided by the
STREAMS Compatibility package to provide full source level compatibility with
Mac OS 9 Open Transport.
— SUPER-UX
OpenSS7 provides a high degree of operational compatibility with
SUPER-UX
to ease portability and common comprehension.
— UXP/V
OpenSS7 provides a high degree of operational compatibility with
UXP/V
to ease portability and common comprehension.
For additional details,
see About This Manual in STREAMS Programmer’s Guide.
7 Releases
This is the OpenSS7 Release of the OpenSS7 core, tools, drivers and modules that
implement the OpenSS7 SVR 4.2 MP STREAMS utility for Linux.
The following sections provide information on OpenSS7 releases as well as
compatibility information of OpenSS7 release to mainstream UNIX releases of the core, modules and
drivers, as well as Linux kernel compatibility.
7.1 Prerequisites
When building from source RPM or DSC, the prerequisites for building must be met. Most RPM or DEB
build prerequisites are automatic; however, some prerequisites must still be met manually. When
building from tarball, most prerequisites must be met manually. The configure script will
inform you of most missing prerequisites and the actions that must be performed to meet those
prerequisites.
Prerequisites for building OpenSS7 package are as follows:
Linux distribution, somewhat Linux Standards Base compliant, with a 2.4, 2.6 or 3.x
kernel and the appropriate tool chain for compiling out-of-tree kernel modules. Most recent
Linux distributions are usable out of the box, but some development packages must be
installed. For more information, see Compatibility.
-
A fairly LSB compliant GNU/Linux distribution.24
If you need to rebuild the package from sources with modifications, you will need a larger GNU
tool chain as described in See Downloading from CVS.
7.2 Compatibility
This section discusses compatibility with major prerequisites.
7.2.1 GNU/Linux Distributions
OpenSS7 is compatible with the following Linux
distributions:27
CentOS Enterprise Linux 3.4 (centos34) TBD
CentOS Enterprise Linux 4.0 (centos4) TBD
CentOS Enterprise Linux 4.92 (centos49) TBD
CentOS Enterprise Linux 5.0 (centos5)
CentOS Enterprise Linux 5.1 (centos51)
CentOS Enterprise Linux 5.2 (centos52)
CentOS Enterprise Linux 5.3 (centos53)
CentOS Enterprise Linux 5.4 (centos54)
CentOS Enterprise Linux 5.5 (centos55)
CentOS Enterprise Linux 5.6 (centos56)
CentOS Enterprise Linux 5.7 (centos57)
CentOS Enterprise Linux 6.0 (centos60)
CentOS Enterprise Linux 6.1 (centos61)
CentOS Enterprise Linux 6.2 (centos61)
CentOS Enterprise Linux 6.3 (centos61)
CentOS Enterprise Linux 6.4 (centos61)
Debian 3.0r2 Woody (deb3.0) TBD
Debian 3.1r0a Sarge (deb3.1) TBD
Debian 4.0r1 Etch (deb4.0)
Debian 4.0r2 Etch (deb4.0)
Debian 4.0r3 Etch (deb4.0)
Debian 5.0 Lenny (deb5.0)
Debian 6.0 Squeeze (deb6.0)
Debian 7.0 Wheezy (deb7.0)
Fedora Core 1 (FC1) TBD
Fedora Core 2 (FC2) TBD
Fedora Core 3 (FC3) TBD
Fedora Core 4 (FC4) TBD
Fedora Core 5 (FC5) TBD
Fedora Core 6 (FC6) TBD
Fedora 7 (FC7)
Fedora 8 (FC8)
Fedora 9 (FC9)
Fedora 10 (FC10)
Fedora 11 (FC11)
Fedora 12 (FC12)
Fedora 13 (FC13)
Fedora 14 (FC14)
Fedora 15 (FC15)
Gentoo 2006.1 (untested) TBD
Gentoo 2007.1 (untested) TBD
Lineox 4.026 (LEL4) TBD
Lineox 4.053 (LEL4) TBD
Mandrakelinux 9.2 (MDK92) TBD
Mandrakelinux 10.0 (MDK100) TBD
Mandrakelinux 10.1 (MDK101) TBD
Mandriva Linux LE2005 (MDK102) TBD
Mandriva Linux LE2006 (MDK103) TBD
Mandriva One (untested)
Mandriva 2010.2 (MDV2010)
Mandriva Enterprise Server 5.2 (MES52)
Oracle Linux Server 5.4 (OLS5)
Oracle Linux Server 5.5 (OLS5)
Oracle Linux Server 5.6 (OLS5)
Oracle Linux Server 5.7 (OLS5)
Oracle Linux Server 6.0 (OLS6)
Oracle Linux Server 6.1 (OLS6)
Oracle Linux Server 6.2 (OLS6)
Oracle Linux Server 6.3 (OLS6)
Oracle Linux Server 6.4 (OLS6)
PUIAS Linux 5.4 (PUIAS5)
PUIAS Linux 5.5 (PUIAS5)
PUIAS Linux 5.6 (PUIAS5)
PUIAS Linux 5.7 (PUIAS5)
PUIAS Linux 6.0 (PUIAS6)
PUIAS Linux 6.1 (PUIAS6)
PUIAS Linux 6.2 (PUIAS6)
PUIAS Linux 6.3 (PUIAS6)
PUIAS Linux 6.4 (PUIAS6)
RedHat Enterprise Linux 3.0 (EL3) TBD
RedHat Enterprise Linux 4 (EL4) TBD
RedHat Enterprise Linux 5 (EL5)
RedHat Enterprise Linux 5.1 (EL5)
RedHat Enterprise Linux 5.2 (EL5)
RedHat Enterprise Linux 5.3 (EL5)
RedHat Enterprise Linux 5.4 (EL5)
RedHat Enterprise Linux 5.5 (EL5)
RedHat Enterprise Linux 5.6 (EL5)
RedHat Enterprise Linux 5.7 (EL5)
RedHat Enterprise Linux 6 (EL6)
RedHat Enterprise Linux 6.1 (EL6)
RedHat Enterprise Linux 6.2 (EL6)
RedHat Enterprise Linux 6.3 (EL6)
RedHat Enterprise Linux 6.4 (EL6)
RedHat Linux 7.2 (RH7)
RedHat Linux 7.3 (RH7)
RedHat Linux 8.0 (RH8) TBD
RedHat Linux 9 (RH9) TBD
Scientific Linux 5 (SL5)
Scientific Linux 5.1 (SL5)
Scientific Linux 5.2 (SL5)
Scientific Linux 5.3 (SL5)
Scientific Linux 5.4 (SL5)
Scientific Linux 5.5 (SL5)
Scientific Linux 5.6 (SL5)
Scientific Linux 5.7 (SL5)
Scientific Linux 6.0 (SL6)
Scientific Linux 6.1 (SL6)
Scientific Linux 6.2 (SL6)
Scientific Linux 6.3 (SL6)
Scientific Linux 6.4 (SL6)
SuSE 8.0 Professional (SuSE8.0) TBD
SuSE 9.1 Personal (SuSE9.1) TBD
SuSE 9.2 Professional (SuSE9.2) TBD
SuSE OpenSuSE (SuSEOSS) TBD
SuSE 10.0 (SuSE10.0) TBD
SuSE 10.1 (SuSE10.1) TBD
SuSE 10.2 (SuSE10.2) TBD
SuSE 10.3 (SuSE10.3) TBD
SuSE 11.0 (SuSE11.0)
SuSE 11.1 (SuSE11.1)
SuSE 11.2 (SuSE11.2)
SuSE 11.3 (SuSE11.3)
SuSE 11.4 (SuSE11.4)
SLES 9 (SLES9) TBD
SLES 9 SP2 (SLES9) TBD
SLES 9 SP3 (SLES9) TBD
SLES 10 (SLES10)
SLES 10 SP1 (SLES10)
SLES 10 SP2 (SLES10)
SLES 11 (SLES11)
SLES 11 SP1 (SLES11)
SLES 11 SP2 (SLES11)
SLES 11 SP3 (SLES11)
Ubuntu 5.10 (ubu5.10) TBD
Ubuntu 6.03 LTS (ubu6.03) TBD
Ubuntu 6.10 (ubu6.10) TBD
Ubuntu 7.04 (ubu7.04) TBD
Ubuntu 7.10 (ubu7.10)
Ubuntu 8.04 (ubu8.04)
Ubuntu 8.04 LTS (ubu8.04)
Ubuntu 8.10 (ubu8.10)
Ubuntu 9.04 (ubu9.04)
Ubuntu 9.10 (ubu9.10)
Ubuntu 10.04 (ubu10.04)
Ubuntu 10.04.2 LTS (ubu10.04)
Ubuntu 10.04.3 LTS (ubu10.04)
Ubuntu 10.10 (ubu10.10)
Ubuntu 11.04 (ubu11.04)
WhiteBox Enterprise Linux 3.0 (WBEL3) TBD
WhiteBox Enterprise Linux 4 (WBEL4) TBD
When installing from the tarball (see Installing the Tar Ball), this distribution is probably
compatible with a much broader array of distributions than those listed above. These are the
distributions against which the current maintainer creates and tests builds.
7.2.2 Kernel
The OpenSS7 package compiles as Linux kernel modules. It is not
necessary to patch the Linux kernel to build or use the package.28 Nor do you have to
recompile your kernel to build or use the package. OpenSS7 packages use autoconf(1)
scripts to adapt the package source to your existing kernel. The package builds and runs nicely
against production kernels from the distributions listed above. Rather than relying on kernel
versions, the autoconf(1) scripts interrogate the kernel for specific features and
variants to better adapt to distribution production kernels that have had patches applied over the
official kernel.org sources.
7.2.2.1 Compatible Kernels
The OpenSS7 package is compatible with 2.4 kernel series after 2.4.10 and has
been tested up to and including 2.4.33. It has been tested from 2.6.3 up to and including 2.6.38
(with RHEL 6.0, SLES 11.1 and Debian 6.0 patch sets). It has been tested from
3.0 up to and including 3.14. Please note that your mileage may vary if you use a kernel more
recent than 3.2: it is difficult to anticipate changes that kernel developers will make in the
future. Many kernels in the 2.6 and 3.x series now vary widely by release version and if you
encounter problems, try a kernel within the supported series.
SMP Kernels
UP validation testing for kernels is performed on all supported architectures. SMP validation
testing was initially performed on UP machines, as well as on an Intel 3.0GHz Pentium IV 630 with
HyperThreading enabled (2x). Because HyperThreading is not as independent as multiple CPUs, SMP
validation testing was limited. Current releases have been tested on dual 1.8GHz Xeon HP servers
(2x), 3.0GHz Pentium D (2x), dual quad-core SunFire (8x) servers and dual hex-core Xeon servers
(12x).
XEN Kernels
It should be noted that, while the packages will configure, build and install against XEN kernels,
that problems running validation test suites against XEN kernels has been reported. XEN
kernels are explicitly not supported. This may change at some point in the future if someone
really requires running OpenSS7 under a XEN kernel.
7.2.2.2 Linux Kernel Upgrades
The OpenSS7 package compiles as Linux kernel modules. Previously, kernel
modules for each and every installed kernel were required. This is no longer the case. The kernel
modules installed by the OpenSS7 package now support weak updates across a wide
range of kernels in the series. This means that it is normally only necessary to build and install
the OpenSS7 kernel modules for one kernel in a series. This is true for all
supported 2.6 and 3.x kernel distributions (and likely for others as well).
7.2.3 Architectures
The OpenSS7 package compiles and installs on a wide range of architectures.
Although it is believed that the package will work on all architectures supported by the Linux
kernel being used, validation testing has only been performed with the following architectures:
ix86
x86_64
ppc (MPC 860)
ppc64
32-bit compatibility validation testing is performed on all 64-bit architectures supporting 32-bit
compatibility. If you would like to validate an OpenSS7 package on a specific machine architecture,
you are welcome to sponsor the project with a test machine.
7.3 Release Notes
The sections that follow provide information on OpenSS7 releases of the
OpenSS7 package.
Major changes for release openss7-1.1.7.20141001
This is the seventh release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Source code release on GitHub.
Major changes for release openss7-1.1.7.20131209
This is the seventh release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Build corrections for RHEL 6.4.
- Scripts for country boundary, shoreline and rivers database preparation.
- Database for ANSI T1.101 point code assignments.
- Suppress extransous /proc/1/comm error messages when testing for systemd.
- Handle PUIAS to Springdale rename for PUIAS distribution.
Major changes for release openss7-1.1.7.20131123
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Correction to ca-cert handling in RHEL 6 install scriptlet.
- RHEL 6 build changes.
- Set permissions correctly when applying kernel module patch.
- Do not duplicate certs when including ca-cert.
- Avoid conflicting shelll variable in RPM install scriplet.
- Remove /proc/1/comm checks for systemd in module loader.
Major changes for release openss7-1.1.7.20130209
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Corrections to RPM spec file.
Major changes for release openss7-1.1.7.20130129
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Compensate for RHEL6 lack of c_rehash.
- Do not create sysfs nodes: they do not work properly.
- Use no foreground flag in strace.service file.
- More error traces for strerr logger.
- Remove static device names (the do not work either).
- Changes to support weak kernel modules.
- Clean up weak module support.
Major changes for release openss7-1.1.7.20130125
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Better Archlinux install script support.
Major changes for release openss7-1.1.6.20130125
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Remove use of kill_litter_super().
Major changes for release openss7-1.1.3.20130125
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Updates and corrections to weak kernel module builds.
- Repo support and corrections for Archlinux packages.
Major changes for release openss7-1.1.3.20130123
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Additional support for Archlinux.
- Add udev rules for strace and strerr.
- Add system unit files for strace and strerr.
- Add repo support for Archlinux packages.
- Build Archlinux packages better.
Major changes for release openss7-1.1.3.20130121
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Build support for SLES 11.
- Handle certificates better.
- Get configuration files in the right places for SLES 11.
- Support in RPM spec file for certificates on SLES 11.
- Create a new OpenSS7 certificate.
- Repository support for SLES 11.
- RPM spec file reworked for new RPM release.
- Better certificate handling for RHEL.
- Additional build support for RHEL 6 with certificates.
- Certificate support in Archlinux PKGBUILD.
- Build support for RHEL 6.
Major changes for release openss7-1.1.3.20130111
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Build and install support for repository.
- Install SSL certificates.
- Cannot open /dev/log anymore.
- Add support for automake-1.13.
- Support systemd modules-load.d and module patching on Archlinux.
- Full detection and support for systemd installations.
- Changes for sysfs device creation and specfs locking.
- Updates to kernel module descriptions and module aliases.
- Use devname aliases where possible.
Major changes for release openss7-1.1.1.20121229
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Added XMON MIB implementation and active agent.
- Updated GNU build chain to m4-1.4.16, autoconf-2.69, automake-1.12.6, libtool-2.4.2, gettext-0.18.2, flex-2.5.37, bison-2.7, swig-2.0.9, autobuild-5.3, texinfo-4.13a, xz-5.0.4.
- Added documentation for monitoring.
- Added pcapng conversion utilities.
- Added LLDP MIBs.
- Added pcapng library and manual pages.
- Enhanced MIB support.
- Add monitoring and new card support to OPENSS7-MX-MIB.
- Support for Allo cards.
- Updated GNU build chain to m4-1.4.16, autoconf-2.69, automake-1.12.1, libtool-2.4.2, gettext-0.18.1, flex-2.5.35, bison-2.5, swig-2.0.7, autobuild-5.3, texinfo-4.13a, xz-5.0.3.
- Support for Archlinux.
- Support for Slackware.
- Support for 3.0.4-1-lts kernel from Archlinux.
- Support for OpenSS7 Live.
- Support for Debian Wheezy.
- Added (IP) network discovery analyzer.
- Added mxconfig graphical card manager.
Major changes for release openss7-1.1.1.20120725
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Added new OPENSS7-MX-MON-MIB for monitoring (probe).
- Created new X400P-MX driver with full monitoring capabilities to work under Archlinux.
Major changes for release openss7-1.1.1.20120715
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Started new X400P-MX driver to support monitoring and multiple uses of channels with SS7.
- Updates to DS1-EXT-MIB.
- General update of DS0/DS1 MIBS and active agents.
- Corrected bad bug by inspection in pullupmsg().
- Corrected bug in mi_copyin().
- Added BPF driver for tcpdump operation.
Major changes for release openss7-1.1.1.20120708
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Converted X400P-SS7 driver for automatic line detection and monitoring.
Major changes for release openss7-1.1.1.20120618
This is the sixth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Correct statistics structures for SS7 link operation and monitoring.
- Build for Archlinux 3.0.36-1-lts kernel.
- Changes to support 3.0 kernel.
- Updated GNU build chain to m4-1.4.16, autoconf-2.69, automake-1.12.6, libtool-2.4.2, gettext-0.18.2,
flex-2.5.37, bison-2.7, swig-2.0.9, autobuild-5.3, texinfo-4.13a, xz-5.0.4.
This is the fifth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Support for Mandriva Linux Enterprise Server 5.2 (2.6.33.7-server-2mnb).
- Support for Scientific Linux 6.0.
- Support for SuSE Linux Enterprise Server 11 SP1.
- Support for OpernSUSE 11.4.
- Support for Fedora 15.
- Support for Red Hat Enterprise Linux Server 6.0.
Major changes for release openss7-1.1.1.20110111
This is the fourth release of the OpenSS7 package. This is a production grade
release. All existing validation test suites run clean on supported distributions, production
kernels and architectures.
Major features since the last release are as follows:
- Support for RHEL 6.0 Beta 2 (refresh) on a 2.6.32-44.1.el6.x86_64(.debug) kernel. Also added
support for compiling with gcc 4.4.
- Support for CentOS 5.5 on a 2.6.18-194.25.1.el5 kernel.
- Support for Debian Squeeze on a 2.6.32-5 kernel.
- Preparatory support for Debian Wheezy.
Major changes for release openss7-1.1.1.20090908
This the third OpenSS7 Project respin of the OpenSS7 package. This is a
production grade release. All existing validation test suites run clean on supported distributions,
production kernels and architectures.
The OpenSS7 package has undergone significant changes, so follow closely. In
it first incarnation, epoch zero (0), the openss7 package was an add-on package to a now
deprecated version of STREAMS. This changed due to the deprecation of the old versions of STREAMS.
In its second incarnation, epoch one (1), the openss7 package contained Linux Fast-STREAMS
and a number of other sub-packages, each capable of building and installing separately. This
changed due to the increasing maintenance overhead as additional sub-packages were added. In its
latest incarnation, epoch two (2), the OpenSS7 package is a monolithic package
containing Linux Fast-STREAMS and most of the other subpackages in a single build package.
Major feature additions since the last public release are:
- Support for CentOS 5.3 and 2.6.18-128.1.10.el5 kernel.
- Interfaces provided for major scripting languages including Java, Tcl, Perl and Ruby using Swig.
Major packaging changes since the last public release, epoch one (1), are:
- The package only compiles with Linux Fast-STREAMS, which is included.
- Only OpenSS7 Project developed modules, drivers, libraries and utilities have been included.
- Forks of other test utilities such as Iperf and Netperf have been removed.
- Sub-package source and installation sub-directories have all been collapsed into the one
openss7 sub-directory.
- A single tarball, SRPM and DSC generates a simple set of 3 binary RPMs or DEBs.
- The entire package is now released under the Affero GNU Public License Version 3; however,
commercial licensing is also available for the entire package.
Major upgrades from the last public release are:
- Updated build system to swig-1.3.39.
- Updated build system to automake-1.11 with full silent build.
- Excluded deprecated sub-packages as follows:
– sctp-0.2.27
– iperf-2.0.8
– netperf-2.3.7
– osr61-0.9.2.3
- Documentation license for all documentation upgraded to GFDL 1.3 with no Invariant Sections, no
Front-Cover Texts and no Back-Cover Texts, for full Debian policy compatibility.
- Updated build system tool chain to m4-1.4.13, automake-1.10.2, bison-2.4.1,
libtool-2.2.6a, texinfo-4.13a.
- Addition of the following sub-packages:
– stratm-0.9.2.1
This subpackage was then instantly absorbed into the new OpenSS7 package.
- Significant feature updates were made to:
– strchan-0.9.2.4
– strsock-0.9.2.4
– strnsl-0.9.2.4
– sigtran-0.9.2.4
- Significant rework of the strchan sub-package into the strss7, strisdn,
strx25 and striso packages. One single driver now meets the needs of all sub-packages.
- Completion of the strsock package, moves from pre-alpha to beta.
- The strnsl subpackage moves from alpha to production.
- Significant completion of the sigtran package: all components moved back to production.
Major maintenance items since the last public release are:
- Fixed hash races in open and close. This was service affecting under heavy open/close loads. (Bug#
openss7 006.)
- Fixed reference counting imbalance when entering and leaving synchronization queues. (Bug# openss7
005.)
- Fixed reference counting imbalance when syncrhonization queues are used on module. (Bug# openss7
004.)
- Fixed timer reporting in the pstrlog() call resulting in near-epoch invalid timestamps. This was an
annoyance. (Bug# openss7 003.)
- Fixed assurances in untimeout and unbufcall utilities. This could be service affecting on many-way
machines. (Bug# openss7 002.)
- Timer cancellation directly from ICS races removed. This could be service affecting on many-way
machines. (Bug# openss7 002.)
- Corrected removal of SLAP_NO_REAP flag from recent kernels causing timeout problems on many-way
machines under memory pressure. (Bug# openss7 001.)
For complete detail on maintenance items, see
BUGS in the release.
This is a public, stable, production grade release of the package: it deprecates previous
releases. Please upgrade to the current release before reporting bugs.
As with other OpenSS7 releases, this release configures, compiles, installs and builds RPMs and DEBs
for a wide range of Linux 2.4 and 2.6 rpm(8) and dpkg(1) based distributions, and
can be used on production kernels without patching or recompiling the kernel.
This package is publicly released strictly under the GNU Affero General Public License Version
3; however, commercial licensing is available. The release is available as an autoconf(1)
tarball, SRPM, DSC, and a set of binary RPMs and DEBs for popular distributions. See the
package page for the autoconf(1)
tarballs, SRPMs, DSCs and binary RPMs and DEBs. See the
repository page for information concerning network
installation and update sources.
This is the sixth public release of the OpenSS7. See README in the release for
a sub-package listing. Most of the sub-packages in the release are production grade for Linux
Fast-STREAMS. All existing validation test suites run clean on supported distributions and
architectures.
The OpenSS7 is not released as often as the sub-packages. As sub-packages are
released more often, to rebuild the master package with a new sub-package release, simply replace
the directory to which the sub-package belongs with the unpacked sub-package release and then
rebuild the master package. This release provides support for recent distributions and tool chains.
Major features since the last public release are as follows:
- License upgrade to AGPL Version 3.
- Modifications to build under Fedora ‘2.6.22.5-49’ kernel. These changes also support
‘2.6.22.9-91.fc7’ kernel. Modifications to build under Fedora ‘2.6.25-45.fc9’ and
‘2.6.26.5-45.fc9’ kernels.
Documented lib32gcc1 problem on Ubuntu.
Noted problem running under XEN kernels. XEN kernels are not yet supported.
Added MODULE_VERSION to all modules and drivers.
- Ability to strap out major documentation build and installation primarily for embedded targets.
Improvements to common build process for embedded and cross-compile targets.
Cross-compile fixes (strap out AC_FUNC_REALLOC macro when cross-compiling).
Conversion of RPM spec files to common approach for major subpackages.
Build system now builds yum(8) repositories for RPMs and apt-get(8) repositories
for DEBs. Installation documentation has been updated to include details of repository install
sourcesref.
- Higher performance and updated performance papers.
- Updated tool chain to m4-1.4.12, autoconf-2.63 and texinfo-4.13.
Support for flex 2.5.33 in maintainer mode.
- Updated references database for manual pages and roff documents.
- Added the following major sub-packages to the master build (and release):
– strx25-0.9.2.1
- All of the major subpackages that are at production release have maintenance upgrades for new
production kernels, distributions and tool chains. Many of the major subpackages have greatly
expanded documentation and provide additional modules and drivers not previously available in public
releases. Significant feature updates were made to:
– strxns-0.9.2.7
– strinet-0.9.2.7
– strchan-0.9.2.4
– strx25-0.9.2.1
– striso-0.9.2.4
– strss7-0.9a.8
– sigtran-0.9.2.4
Please see the individual NEWS files in each of the subpackages for more information.
This is a public stable production grade release of the package: it deprecates previous
releases. Please upgrade to the current release before reporting bugs.
As with other OpenSS7 releases, this release configures, compiles, installs and builds RPMs and DEBs
for a wide range of Linux 2.4 and 2.6 RPM- and DPKG-based distributions, and can be used on
production kernels without patching or recompiling the kernel.
This package is publicly released under the GNU Affero General Public License Version 3. The
release is available as an autoconf tarball, SRPM, DSC, and set of binary RPMs and DEBs.
See the downloads page for the autoconf
tarballs, SRPMs and DSCs. For tarballs, SRPMs, DSCs and binary RPMs and DEBs, see the
openss7 package page.
This is the fifth public release of the OpenSS7. See
README in the release for a sub-package listing. Most of the
sub-packages in the release are production grade for Linux Fast-STREAMS.
All existing validation test suites run clean on supported distributions and
architectures.
The OpenSS7 is not released as often as the sub-packages.
As sub-packages are released more often, to rebuild the master package with a
new sub-package release, simply replace the directory to which the sub-package
belongs with the unpacked sub-package release and then rebuild the master
package. This release provides support for recent distributions and tool
chains.
Major features since the last public release are as follows:
- Support build on openSUSE 10.2.
- Support build on Fedora 7 and 2.6.21 kernel.
- Support build on CentOS 5.0 (RHEL5).
- Support build on Ubuntu 7.04.
- Updated to gettext 0.16.1.
- Changes to support build on 2.6.20-1.2307.fc5 and 2.6.20-1.2933.fc6 kernel.
- Supports build on Fedora Core 6.
- Support for recent distributions and tool chains.
Major changes for release openss7-0.9.2.E
This is the fourth public release of the OpenSS7. See
README in the release for a sub-package listing. Most of the
sub-packages in the release are production grade for Linux Fast-STREAMS.
All existing validation test suites run clean on supported distributions and
architectures.
It is unlikely that the OpenSS7 will be released as
frequently as before. Sub-packages will be released more often. To rebuild the
master package with a new sub-package release, simply replace the directory to
which the sub-package belongs with the unpacked sub-package release and then
rebuild the master package. This release provides support for recent
distributions and tool chains.
Major features since the last public release are as follows:
- Addition of the osr61 sub-package that contains
Dialogic® Open System Release 6.1 version 239 GPL drivers.
- A few minor corrections to the common build process.
- Support for autoconf 2.61, automake 1.10 and gettext 0.16.
- Support for Ubuntu 6.10 distribution and bug fixes for i386 kernels.
- The package now looks for subpackages with a version number as unpacked by
separate tarball.
Major changes for release openss7-0.9.2.D
This is the fourth public release of the OpenSS7. The
sub-packages have been reorganized for this release. See README in the
release for a sub-package listing. Aside from sub-package reorganization, the
major difference from previous release is that this release no longer contains
LiS. Too many of the sub-packages will not even build against
LiS because of its Stream head deficiencies.
Most of the sub-packages in the release are production grade for Linux
Fast-STREAMS. All existing validation test suites run clean on supported
distributions and architectures. The packages build better Debian/Ubuntu .deb
files.
It is unlikely that the OpenSS7 will be released as
frequently as before. Sub-packages will be released more often. To rebuild
the master package with a new sub-package release, simply replace the
directory to which the sub-package belongs with the unpacked sub-package
release and then rebuild the master package.
The release provides the following enhancements and fixes:
- Added the following sub-packages to the master build (and release):
– strnsl-0.9.2.1
– strbcm-0.9.2.1
– striso-0.9.2.1
– strsock-0.9.2.1
– strtty-0.9.2.1
– strutil-0.9.2.1
- Automated release file generation making for vastly improved and timely text
documentation present in the release directory.
- This release candidate includes the changes made to the strsctp drivers at the
2006 SCTP Interop at the University of British Columbia. This version was
interoperability tested with all implementations present.
- Better support for Ubuntu and recent gcc compilers, including debian
script corrections.
- Support for most recent 2.6.18 kernels (including Fedora Core 5 with inode
diet patchset).
- Now builds 32-bit compatibility libraries and tests them against 64-bit kernel
modules and drivers. The ‘make installcheck’ target will now automatically
test both 64-bit native and 32-bit compatibility versions, one after the other,
on 64-bit platforms.
- Added versions to all library symbols.
- Many documentation updates for all OpenSS7 packages.
- Dropped support for LiS.
- Start assigning majors at major device number 231 instead of major device
number 230. Assign major device number 230 explicitly to the clone device.
Package will now support extended ranges of minor devices on 2.6 kernels under
Linux Fast-STREAMS only. streams now supports expanded addressable
minor device numbers, permitting 2^16 addressable minor devices per major
device number on 2.6 kernels: LiS cannot support this change.
- Better detection of SuSE distributions, release numbers and SLES
distributions: support for additional SuSE distributions on ix86 as well as
x86_64. Added distribution support includes SLES 9, SLES 9 SP2, SLES 9 SP3,
SLES 10, SuSE 10.1.
- Improvide compiler flag generation and optimizations for recent gcc
compilers and some idiosyncratic beahviour for some distributions (primarily
SuSE).
- Optimized compilation is now available also for user level programs in
addition to kernel programs. Added new ‘--with-optimize’ option to
configure to accomplish this.
- Added ‘--disable-devel’ configure option to suppress building
and installing development environment. This feature is for embedded or pure
runtime targets that do not need the development environment (static
libraries, manual pages, documentation).
- Added send-pr script for automatic problem report generation.
- Each package will not build doxygen(1) html documentation with the
‘make doxy’ target. See ‘make help’ or README-make in the
distribution for more information.
Major changes for release openss7-0.9.2.D.rc3
Third release candidate.
- The package will now build doxygen(1) html documentation with the ’doxy’ make
target. See ’make help’ or README-make in the distribution for more
information.
- Now builds 32-bit compatibility libraries and tests them against 64-bit kernel
modules and drivers. The ‘make installcheck’ target will now automatically
test both 64-bit native and 32-bit compatibility versions, one after the other,
on 64-bit platforms.
- Added complete documentation and Installation and Reference Manual for
the OpenSS7 (this manual).
- Added the following sub-packages to the master build (and release):
– strbcm-0.9.2.1
– striso-0.9.2.1
– strsock-0.9.2.1
– strtty-0.9.2.1
– strutil-0.9.2.1
- Automated release file generation making for vastly improved and timely text
documentation present in the release directory.
- Dropped support for LiS.
- Sub-packages will now support extended ranges of minor devices on 2.6 kernels
under Linux Fast-STREAMS only.
- This release candidate provides support for additional SuSE distributions on
ix86 as well as x86_64. Added distribution support includes SLES 9, SLES 9 SP2,
SLES 9 SP3, SLES 10, SuSE 10.1.
- This release candidate includes the changes made to the strsctp drivers at the
2006 SCTP Interop at the University of British Columbia. This version was
interoperability tested with all implementations present.
This was an subscriber release.
Major changes for release openss7-0.9.2.D.rc2
Second release candidate.
This release candidate also contains the results of performance testing of the
new second generation UDP driver (implemented completely in STREAMS instead of
using an internal socket).
This release candidate also contains support for SuSE 10.1.
This was an subscriber release.
Major changes for release openss7-0.9.2.Drc1
First release candidate.
- Release candidate for Mark Fugate.
- Added –enable-devel configure option for embedded targets.
- Added send-pr script for automatic problem report generation.
This was an subscriber release.
Major changes for release openss7-0.9.2.C
Distribution check for entire master package. Trying to get master package
into form where it can be released as a complete package.
This was a public release.
Major changes for release openss7-0.9.2.B
Minor changes for wider release, better master packaging and bug fixes.
This was a public release.
Major changes for release openss7-0.9.2.A
With this release version numbers were changed to reflect an upstream version
only to be consistent with other OpenSS7 package releases. All RPM release
numbers will be -1$(PACKAGE_RPMEXTRA) and all Debian release numbers will be
‘_0’. If you wish to apply patches and release the package, please bump up
the release number and apply a suitable release suffix for your organization.
We leave Debian release number _1 reserved for your use, so you can still bundle
the source in the .dsc file.
Major changes for this release include build against Linux 2.6 kernels and
popular distributions based on the 2.6 kernel as well as wider distribution
support.
This was a public release.
Initial release openss7-0.9.2-1
Initial autoconf/RPM release of the OpenSS7 master package.
This master package contains all other OpenSS7 releases.
7.4 Maturity
The OpenSS7 Project adheres to the following release philosophy:
pre-alpha release
alpha release
beta release
gamma release
production release
unstable release
7.4.1 Pre-Alpha Releases
Pre-alpha releases are releases that have received no testing whatsoever. Code in the release
is not even known to configure or compile. The purpose of a pre-alpha release is to make code and
documentation available for inspection only, and to solicit comments on the design approach or other
characteristics of the software package.
Pre-alpha release packages ship containing warnings recommending that the user not even
execute the contained code.
7.4.2 Alpha Releases
Alpha releases are releases that have received little to no testing, or that have been tested
and contains known bugs or defects that make the package unsuitable even for testing. The purpose
for an alpha release are the same as for the pre-alpha release, with the additional purpose
that it is an early release of partially functional code that has problems that an external
developer might be willing to fix themselves and contribute back to the project.
Alpha release packages ship containing warnings that executing the code can crash machines and
might possibly do damage to systems upon which it is executed.
7.4.3 Beta Releases
Beta releases are releases that have received some testing, but the testing to date is not
exhaustive. Beta release packages do not ship with known defects. All known defects are
resolved before distribution; however, as exhaustive testing has not been performed, unknown
defects may exist. The purpose for a beta release is to provide a baseline for other
organizations to participate in the rigorous testing of the package.
Beta release packages ship containing warnings that the package has not been exhaustively
tested and that the package may cause systems to crash. Suitability of software in this category
for production use is not advised by the project; however, as always, is at the discretion of the
user of the software.
7.4.4 Gamma Releases
Gamma releases are releases that have received exhaustive testing within the project, but
external testing has been minimal. Gamma release packages do not ship with known defects. As
exhaustive internal testing has been performed, unknown defects should be few. Please remember that
there is NO WARRANTY on public release packages.
Gamma release packages typically resolve problems in previous beta releases, and might
not have had full regression testing performed. Suitability of software in this category for
production use is at the discretion of the user of the software. The OpenSS7 Project
recommends that the complete validation test suites provided with the package be performed and pass
on target systems before considering production use.
7.4.5 Production Releases
Production releases are releases that have received exhaustive testing within the project and
validated on specific distributions and architectures. Production release packages do not
ship with known defects. Please remember that there is NO WARRANTY on public release packages.
Production packages ship containing a list of validated distributions and architectures.
Full regression testing of any maintenance changes is performed. Suitability of software in this
category for production use on the specified target distributions and architectures is at the
discretion of the user. It should not be necessary to preform validation tests on the set of
supported target systems before considering production use.
7.4.6 Unstable Releases
Unstable releases are releases that have received extensive testing within the project and
validated on a a wide range of distributions and architectures; however, is has tested unstable and
found to be suffering from critical problems and issues that cannot be resolved. Maintenance of the
package has proved impossible. Unstable release packages ship with known defects (and loud
warnings). Suitability of software in this category for production use is at the discretion of the
user of the software. The OpenSS7 Project recommends that the problems and issues be closely
examined before this software is used even in a non-production environment. Each failing test
scenario should be completely avoided by the application. OpenSS7 beta software is more
stable that software in this category.
7.5 Bugs
7.5.1 Defect Notices
OpenSS7 could contain unknown defects. This is a beta release. Some
defects could be harmful. Validation testing has been performed by the OpenSS7 Project on
this software for only a restricted set of systems. The software might fail to configure or compile
on other systems. The OpenSS7 Project recommends that you do not use this software for
purposes other than validation testing and evaluation, and then only with care. Use at your own
risk. Remember that there is NO WARRANTY.29
This software is beta software. As such, it might crash your kernel. Installation of the
software might mangle your header files or Linux distribution in such a way as to make it unusable.
Crashes could lock your system and rebooting the system might not repair the problem. You can
possibly lose all the data on your system. Because this software might crash your kernel, the
resulting unstable system could possibly destroy computer hardware or peripherals making them
unusable. You might void the warranty on any system on which you run this software. YOU HAVE BEEN
WARNED.
7.5.2 Known Defects
With the exception of packages not originally created by the OpenSS7 Project, the
OpenSS7 Project software does not ship with known bugs in any release stage except
pre-alpha. OpenSS7 had no known bugs at the time of release.
7.5.3 Defect History
This section contains historical bugs that were encountered during development
and their resolutions. This list serves two purposes:
It captures bugs encountered between releases during development that could possibly reoccur (and
the Moon is made of blue cheese). It therefore provides a place for users to look if they encounter
a problem.
It provides a low overhead bug list between releases for developers to use as a TODO list.
Bugs
Some portions of this package are not completely implemented yet, so the bugs for those portions
are still being designed and will not be available until a later date. Most of the package is
complete and for the most part bugs are currently available.
openss7 009. 2010-12-14T07:29:58+0000
Found a bug in msgpullup(9) that caused it to always fail. Strange enough, msgpullup(9) only
attempted after pullupmsg(9) failed in all OpenSS7 drivers and modules.
*fixed* in openss7-1.1.1.20110111
openss7 008. 2010-08-09T17:41:46+0000
The t_alloc(3) function was incorrectly returning a TLOOK error when called when an
outstanding event was pending. Thanks to John Hodgkinson at Boldon James for reporting this bug. A
similar bug was found by inspection for t_bind(3), t_getinfo(3),
t_getprotaddr(3).
*fixed* in openss7-1.1.1.20110111
openss7 007. 2010-06-09T12:13:41+0000
The t_rcv(3) function was not reseting data when the amount of data to be read was exactly
the amount of data available. Thanks to John Hodgkinson at Boldon James for reporting this bug.
*fixed* in openss7-1.1.1.20111011
openss7 006. 2009-08-31T04:04:52+0000
A number of functions in strlookup.c were moving the found item in the hash collision list to
the head of the list; however, a number of these functions were being called with a read lock
instead of a write lock on the corresponding hash table. This caused crashes on kernels checking
for list corruption on SMP machines under heavy open/close loads. The movement of the found entry
to the head of the collision list has dubious performance advantages (as the hash entries are
cached). Therefore, the practice has been removed (actually suppressed). Thanks to Tony Abo at
HiTech for the report leading to this bug.
qattach(9) was taking a reference on a synchronization queue without the reference being
released in qdelete(9). qdelete(9) was fixed to release the reference taken by
setsq(9) in qattach(9). Thanks to Tony Abo at HiTech for identifying and
reporting this bug.
*fixed* in openss7-1.1.1.20090908
openss7 003. 2009-04-17T11:56:06+0000
The strace, strerr daemons and the pstrlog call in the streams library were not initializing ltime
before the call to ctime_r(3) resulting in an epoch timestamp (Jan 1, 1970). Thanks to
Pierre Crepieux for identifying and reporting this bug.
*fixed* in openss7-1.1.1.20090908
openss7 002. 2009-03-26T07:56:40+0000
Untimeout and unbufcall did not wait until the callback returned before returning when there was a
collision between a cancellation of an event and the callback for the event. Linux Fast-STREAMS now
makes this assurance, provided that the cancellation is not being invoked from within the same
thread as the callback (i.e. untimeout called from an ISR interrupting the callback, or, say, from
the callback itself) in which case it returns immediately.
Also, additional timer problems were encountered. Cancelling timers from within an ISR did not have
sufficient list protection (irq suppression) potentially resulting in list corruption or queue
reference counting problem.
*fixed* in openss7-1.1.1.20090908
openss7 001. 2008-12-16T08:17:47+0000
Somewhere about Linux kernel ‘2.6.17’, and during the openss7-0.9.2.D.rc2 master package
release, it was discovered that SLABs no longer supported the SLAB_NO_REAP flag. Unfortunately, the
seinfo_ctor(9) function was assuming that the SLAB_NO_REAP flag was being recognized.
This means that over the span of some several days on system heavily using timers that a slab
corruption would eventually occur resulting in a kernel crash, particularly on x86_64 kernels. The
‘seinfo’ slab functions have been rewritten to not expect the SLAB_NO_REAP feature. There was
also a minor possibility of a strevent structure identifier overlap after an extremely long period
of intensive operation, and that has been fixed as well. Thanks to Angel Diaz for reporting this
bug.
*fixed* in openss7-1.1.1.20090908
strinet 004. 2008-10-24T08:04:16+0000
UDP and RAWIP drivers cannot receive zero-length messages in accordances with UNIX ’98 and XNS 5.2.
Use the UDP2 and RAWIP2 drivers instead if this is important to you as they exhibit full UNIX ’98
XNS 5.2 conformance.
mi_open_link(9) was not returning the assigned device number in devp when sflag was
CLONEOPEN.
*fixed* in strcompat-0.9.2.7.
streams 025. 2008-10-17T05:57:29+0000
‘putnext(q, mp)’ was checking whether procedures had been turned off on queue ‘q’. This
was not correct as it is only the ‘q->q_next’ put procedure that would be executed. It should
only check procedures on ‘q->q_next’.
*fixed* in streams-0.9.2.4
streams 024. 2008-10-11T19:36:41+0000
A list delete corruption bug in the STREAMS driver and module lookup functions (e.g.
__cdrv_lookup) was discovered by the list debugging in the FC9 kernel.
*fixed* in streams-0.9.2.4
streams 023. 2008-10-11T19:36:23+0000
Not really a bug, but newer (2.6.25) kernels no longer permit registration of binary identifiers for
sysctls (i.e. ctl_name). The proc filesystem entries (i.e. procname) are still
permitted and ctl_name should be set to zero for these kernels. Added a check for the
existence of symbol sysctl_check_table(9) to identify when binary registration is
forbidden. Another related problem is that when binary registration of system controls is not
possible, sysctl(2) becomes worthless. Unfortunately, the STREAMS MIB agent was written to
use sysctl(2) and needs to be rewritten to use the /proc/sys filesystem instead ala
sysctl(8).
*fixed* in streams-0.9.2.4
streams 022. 2008-10-07T18:40:25+0000
When overriding 32-bit compatability on input-output controls conflicting from the CDROM block
device with STREAMS input-output controls, the override was not properly passing CDROM input-output
controls through due to a missing break statement in the override loop. This bug affected
pre-2.6.11 kernels, likely manifesting itself in a non-function CDROM device while STREAMS was
loaded. Bug reported and one-line fix provided by Sylvain Chouleur for DGAC.
*fixed* in streams-0.9.2.4
strxns 003. 2008-09-03T06:10:28+0000
Over-restricted settable range of tos in np_ip driver. Thanks to Christophe Nolibos for
reporting this bug.
*fixed* in strxns-0.9.2.7
strnsl 004. 2008-08-20T06:02:09+0000
To permit the xnsl library to be used on systems with the broken libtirpc package, we now place the
file in /etc/netconfig.xnsl instead of /etc/netconfig where the broken libtirpc package for
GNU/Linux expects a broken /etc/netconfig configuration file. The library has been adjusted to
first look for /etc/netconfig.xnsl before looking for /etc/netconfig.
*fixed* in strnsl-0.9.2.4.
strss7 006. 2008-08-17T03:42:23+0000
The xnet library was discovered to contain a thread-safety bug caused by newer behaviour of
pthread_once(3) causing the library to core dump when used on recent implementations of
pthreads (nptl).
The xnet library is no longer normally compiled as part of the strss7 package.
*fixed* in strss7-0.9a.8.
strsock 001. 2008-08-17T03:42:23+0000
The socket, socklib and sockpath libraries were discovered to contain a thread-safety bug caused by
newer behaviour of pthread_once(3) causing the libraries to core dump when used on recent
implementations of pthreads (nptl).
*fixed* in strsock-0.9.2.4.
strnsl 003. 2008-08-17T03:42:23+0000
The xnsl library was discovered to contain a thread-safety bug caused by newer behaviour of
pthread_once(9) causing the library to core dump when used on recent implementations of
pthreads (nptl).
*fixed* in strnsl-0.9.2.4.
strxnet 001. 2008-08-17T03:42:23+0000
The xnet and xnsl libraries were discovered to contain a thread-safety bug caused by newer behaviour
of pthread_once(3) causing the libraries to core dump when used on recent implementations
of pthreads (nptl).
*fixed* in strxnet-0.9.2.12.
strinet 003. 2008-08-02T02:58:49+0000
Some test cases are failing for the TCP driver when SELinux is set for Enforcing. Either the
STREAMS kernel threads kstream/0, etc. need to be permitted or SELinux must be set to Permissive or
Disabled. Conditions were added to the testsuite to expect failures on 30 specific tests when
SELinux is set to Enforcing.
*addressed* in strinet-0.9.2.7
streams 021. 2008-08-01T22:32:08+0000
When flushing queues the backenable bits were not being initialized to zero in
__flushq(9), resulting in back-enabling of bands (or the normal queue) was being performed
depending on the uninitialized values in the backenable bit array. This only affected
I_SETSIG signals for SWRNORM and SWBAND, and the only when flushing
queues. Fix properly initializes the backenable array.
*fixed* in streams-0.9.2.4
streams 020. 2008-07-31T04:59:41+0000
Not really a bug (for STREAMS), but when the streams.ko kernel module is loaded,
the crash(8) debugger will not debug a running kernel because it finds the
runqueues(9) exported function in the streams.ko module instead of the the static
one from the kernel. This has been temporarily renamed by macro to srunqueues(9) (notice
the leading ‘s’) until crash(8) learns to do the right thing and check that the
symbol it looks up comes from the kernel instead of a kernel module.
*workaround* in streams-0.9.2.4
streams 019. 2008-07-25T22:41:47+0000
When M_READ was being issued by the Stream Head downstream an srlock(0) imbalance in
strsendmread(9) was causing soft-lockups on close for recent read-write lock
implementations on CentOS 5.2 for ‘x86_64’.
*fixed* in streams-0.9.2.4
streams 018. 2008-07-25T01:15:26+0000
Previous fix didn’t work too good: returning [EAGAIN] when hung-up on getmsg(2s),
getpmsg(2s), read(2s), readv(2s) instead of 0 and terminal end of file.
This caused a regression on four or five other test cases.
*fixed* in streams-0.9.2.4
strcompat 006. 2008-07-11T13:52:04+0000
lis_alloc_sem() was not setting the supplied count against the created semaphore, but was alway
setting the semaphore to 1 (unlocked).
*fixed* in strcompat-0.9.2.7.
strcompat 005. 2008-05-26T14:06:22+0000
lis_register_strdev() was failing whenever nminor was greater than zero or not an even multiple of
256. This was due to an error in the logic checking for multiple majors. (Thanks to Omer Tunali
for reporting this bug.)
*fixed* in strcompat-0.9.2.7.
streams 017. 2008-04-10T15:17:30+0000
When M_DATA is sent upstream followed by M_HANGUP, read(2s) is returning zero
(0) and not permitting the data associated with the M_DATA to be read. This is a bug per
documentation. read(2s) should operate as normal following a hangup until all data is read
and then return zero (0).
The difficulty is that when waking up from a read sleep or when entering read the hangup condition
was generating an internal [ESTRPIPE] error. This was altered so that [ESTRPIPE] is
only returned during the hangup condition after the read queue has been tested and the caller is
about to sleep on read.
Test cases 3.2.1, 3.5.1 and 3.6.1 in the test-streams test suite executable were altered to validate
the fix for this case and curtail regressions.
*fixed* in streams-0.9.2.4
streams 016. 2007-11-14T17:23:57+0000
Read is blocking when data has been read, O_NONBLOCK and O_NDELAY unset,
RFILL unset, in non-SVR4 mode. This violates POSIX specifications.
Test case 3.1.11.4 in the test-streams test suite executable was generated to validate the fix for
this case and to curtail regressions.
*fixed* in streams-0.9.2.4
streams 015. 2007-11-14T17:19:01+0000
Dynamic allocation of major device numbers is not working on recent 2.6 kernels. Someone slipped
some code in the kernel to have register_chrdev(9) allocate from major 255 down (again).
Changed code to allocate modid according to our own rules and then request the same for a major
device number. This also ensures that module ID and major are the same.
*fixed* in streams-0.9.2.4
strchan 001. 2007-10-15T16:17:08+0000
Removing definition of freezestr(9) and unfreezestr(9) in ch_pmod.c and mx_pmod.c
was causing loss of version information on old 2.4 kernels. Workaround is to use the _SUN versions
as is until it can be fixed in streams or strcompat.
*fixed* in strchan-0.9.2.4
strsctp 007. 2007-07-21T21:06:48-0600
It was discovered that many network devices were claiming to have hardware checksum capability by
setting the NETIF_HW_CSUM flag, but did not support SCTP checksum offload.
*workaround* in strsctp-0.9.2.8
The workaround is to ignore the flag for now. Either Linux network drivers need to start supporting
SCTP checksum when they set the NETIF_HW_CSUM flag, or there needs to be some flag provided
for SCTP. The workaround is to not believe that the driver does SCTP checksum offload when
NETIF_HW_CSUM is set.
strsctp 006. 2007-07-21T21:05:10-0600
It was detected that the XTI_SNDBUF and XTI_RCVBUF options were not being set correctly
(in fact, not being set at all).
*fixed* in strsctp-0.9.2.8
XTI_SNDBUF now limits the maximum available send window. XTI_RCVBUF now alters the
advertized receive window.
openss7 002. 2007-07-21T17:26:01-0600
It was reported that validation test suites for XEN kernels are failing. XEN kernels are,
therefore, not supported. (Thanks to Bryan Shupe at Flying J for reporting this bug.)
*noted* in openss7-0.9.2.G
strcompat 004. 2007-07-21T17:26:01-0600
It was reported that, even with the fix below, validation test suites for XEN kernels are failing.
XEN kernels are, therefore, not supported. (Thanks to Bryan Shupe at Flying J for reporting this
bug.)
*noted* in strcompat-0.9a.7.rc1.
strcompat 003. 2007-07-21T17:22:10-0600
It was reported that paddr_t is already defined in recent XEN kernels, causing compile to fail for
these kernels. (Thanks to Bryan Shupe at Flying J for reporting this bug.)
*fixed* in strcompat-0.9a.7.rc1.
A check was added to the configure script to check for the existence of paddr_t.
strss7 005. 2007-07-21T17:15:02-0600
It was discovered that recent kernel on RHAS4 are defining irq_handler_t but have the old 3 argument
function template for irq handlers. The detection logic assumed that if irq_hander_t existed, that
the newer 2 argument function template for irq handlers were in effect. This caused builds to fail
on these RHAS4 kernels.
*fixed* in strss7-0.9a.8.rc1.
A check was added to the configure script to test whether the irq_handler_t has the newer 2 argument
template.
strcompat 002. 2007-07-21T17:15:02-0600
It was discovered that recent kernel on RHAS4 are defining irq_handler_t but have the old 3 argument
function template for irq handlers. The detection logic assumed that if irq_hander_t existed, that
the newer 2 argument function template for irq handlers were in effect. This caused builds to fail
on these RHAS4 kernels.
*fixed* in strcompat-0.9a.7.rc1.
A check was added to the configure script to test whether the irq_handler_t has the newer 2 argument
template.
openss7 001. 2007-06-27T08:53:51+0000
A report was made by Chris from Sandia that the build process choked on building 32-bit libraries
and applications on an x86_64 system under Ubuntu Fiesty (7.04). While most other distributions
include the gcc 32-bit compatibility libraries for 64-bit architectures with a 32-bit
emulation mode, Ubuntu (and maybe Debian too) does not. The Ubuntu 7.04 package that is missing is
the lib32gcc1 package. There are two workarounds to this difficulty: add the
lib32gcc1 package (with apt), or add the ‘--disable-32bit-libs’ flag to
‘configure’.
*noted* in openss7-0.9.2.G
strnsl 002. 2007-06-20T15:22:19-0600
The libtirpc package for current releases of GNU/Linux including NFS4 has usurped a broken
/etc/netconfig file for use by its broken implementation of TI-RPC. So when strnsl and more
importantly the strinet package installs its /etc/netconfig entries, the libtirpc package breaks.
To avoid this problem, I think that the best approach is to install a libtirpc entry (or a copy of
the broken /etc/netconfig) into the /etc/netconfig.d subdirectory when strnsl installs and restore
it to /etc/netconfig when strnsls removes.
Fixed in the current release: the actual fix involves not calculating the /etc/netconfig file from
the /etc/netconfig.d subdirectory entries when an /etc/netconfig file exists that we have not
generated.
strsctp 005. 2007-05-18T07:06:33+0000
Found the most obnoxious of bugs. When testing on loopback, more than 255 calls were being made to
dupb(9) causing the db_ref field of the data block to wrap to zero, causing an
incorrect reference count.
*fixed* in strsctp-0.9.2.7
streams 014. 2007-05-17T21:48:24+0000
The dupb(9) utility had an obnoxious bug where it permitted the db_ref count to
wrap to zero, causing buffer allocation and freeing problems. This was very difficult to debug.
dupb(9) now fails if the reference count has reached 255. When dupb(9) fails, the
user should check if the reference count has reached 255, and if it has, attempt a deep
copyb(9) instead. At some point it might be useful to have STREAMS do the deep copy
automatically. This was discovered in strsctp loopback tests where message blocks are
rapidly duplicated for retransmission.
*fixed* in streams-0.9.2.3
streams 013. 2007-05-17T21:48:06+0000
The log driver, strace, strerr and strclean utilities had some bugs. The strsctp driver now
makes extensive use of strlog(9) trace and error logging and the log driver and utilities
have been corrected. These facilities are now production grade.
*fixed* in streams-0.9.2.3
streams 012. 2007-04-13T01:47:30+0000
It appears that Ubuntu 6.10 has a rather broken implementation of the LSB
install_init that has been inherited from Debian (a python script, none the less). This
implementation refuses to properly install a disabled service (one with an empty or missing
Default-Start: tag), but, rather invokes updated-rc.d in such a way that the init script is started
at runlevels ‘2 3 4 5’ instead. This was causing problems with the strace and strerr services
which are normally installed disabled.
This uncovered the fact that the Debian-style init scripts were not working anyway. The scripts
have been fixed and the strace and strerr utilities now default to enabled.
*fixed* in streams-0.9.2.3
streams 011. 2007-04-10T10:56:42+0000
The strbcflag flag was never being cleared, causing infinite looping of the scheduler once the
maximum number of buffers was reached. This also revealed a problem that bufcalls were being run
unncecessarily (when strbcwait was set, instead of only when strbcflag was set).
*fixed* in streams-0.9.2.3
streams 010. 2007-04-10T10:55:29+0000
The stream event sequence number was wrapping and becoming larger than the event mask resulting in
inability to cancel buffer callbacks and timeouts.
*fixed* in streams-0.9.2.3
strxns 002. 2007-04-02T13:04:36+0000
Option handling bug in ldltest.
*fixed* in strxns-0.9.2.6
streams 009. 2007-04-02T11:57:35+0000
ldl was using an incorrect MKDEV command, but when the Stream head attempted to redirect the
open to the new (mangled) major device number, it properly returned ENXIO, but did not release a
reference to the module. Need to check code paths for this to see where the reference needed to be
released.
*known bug*
strxns 001. 2007-04-02T11:52:59+0000
ldl was not demand loading for 2.6 kernels due to missing MODULE_ALIAS declarations. Also,
ldl had an incorrect SVR 3 style ‘MKDEV(MAJOR(*devp), i)’ construct in it that was using
Linux utilities instead of Linux Fast-STREAMS utilities, causing the Stream head to attempt to
redirect the major device. Unfortunalely, this was failing. Changed to the correct SVR 4 style
‘makedevice(getmajor(*devp), i)’. (There must still be a bad major redirection path in the
Stream head.)
*fixed* in strxns-0.9.2.6
streams 008. 2007-03-31T05:33:29-0600
When loosening SMP locking, found a bug in the QWANTR handling in getq(9) and back-enabling
in flushq(9) and flushband(9). Both of these were generating false back-enables.
The getq(9) was generating a lot of false back-enables. Whenever getq(9)
found an empty queue it was not only setting QWANTR, but it was back-enabling the queue. The result
is that if service procedures are used exclusively (that is, qi_put(9) always does a
putq(9)), getq(9) would generate a false back-enable for each message. Also, the
enabled queue would generate another false back-enable. Significant performance gains should be
noticed.
*fixed* in streams-0.9.2.3
streams 007. 2007-03-16T17:33:20-0600
Jérémy
Compostella pointed out an error in strallocpmsg(9) where it was always assigining
M_PCPROTO to messages created with I_FDINSERT.
*fixed* in streams-0.9.2.3
streams 006. 2007-03-14T23:48:26-0600
There appears to be an inode lock imbalance that occurred for several clone error paths in stropen.
If the returned major device number does not correspond to a driver, or an snode cannot be acquired
for the new entry and the stream head reparented.
*fixed* in streams-0.9.2.2
strsctp 004. 2007-03-14T17:36:31-0600
Another bug found, a double buffer free in sctp_recv_msg(9) when calling
sctp_rcv_ootb(9). This bug was discovered during verification testing on a high speed SMP
machine.
It appears that V401PE cards were almost loading (configuring, mapping, downloading firmware) but
were failing to configure at the final stage of the process (matching device id to board type).
The device id for the 2155 is supposed to be b4 regardless of E1 or T1, but I just guess that the
card is reporting 34 instead of b4 for E1 (it might be the firmware setting or unsetting the high
bit as was done for the other devices). I changed the sl_x400p.c driver to print error messages
when loading if such mismatches occur and set the device ids to accept 0x3X as an E1 2155 device and
0bX as a T1/J1 2155 device (even though they are all the same).
As it turns out, the V401PE cards have a DS2156 chip instead of a DS2155 chip. The only difference
is the lack of Tx fixed gain control (register 0x7d) and the DS2156 supports a UTOPIA II bus that is
not used on the V401PE. I changed the driver to recognize the DS2156 and skip register 0x7d when it
exists. The DS2156 chip will work for both V401T (D33D) and V401E (D44D) cards.
*fixed* in strss7-0.9a.6
strsctp 003. 2007-03-10T05:59:10-0700
One serious locking problem discovered. sctp_cleanup_read(9) was suppressing IRQs across
calls to putnext(9) when delivering data and acknowledgements. Recent kernels on Fedora
and Ubuntu were complaining about IRQs suppressed across calls to local_bh_enable(9) in
M2PA and that is what lead to the discovery.
*fixed* in strsctp-0.9.2.7
strtty 001. 2007-03-09T15:31:23-0700
The package was installing /dev/ptmx and /dev/pts/n device and removing them when uninstalling.
This caused havoc with Linux’s UNIX’95 pseudo-terminal devices. They have been strapped out until
later.
*fixed* in strtty-0.9.2.2
sigtran 001. 2007-03-08T21:09:59-0700
The inital timeout values associated with a freshly pushed M2PA module were being set to HZ based
values instead of milliseconds. This did not affect the test program (which explicitly sets the
values), but could have affected applications programs on systems where the tick clock is 100 Hz.
*fixed* in sigtran-0.9.2.2
strss7 002. 2007-03-08T21:05:47-0700
Timers were message up (using HZ instead of milliseconds) on the X400P driver. This did not affect
architectures with 1000 HZ or 1024 HZ tick clocks, but 100 HZ systems object.
*fixed* in strss7-0.9a.6
streams 005. 2007-03-07T15:53:06-0700
Demand loading of kernel modules for clone devices opened, for example, as /dev/streams/clone/mux
was requesting module streams-clone-mux and /dev/streams/clone/mux but was not requesting
streams-mux or /dev/streams/mux and the modules were failing to demand load.
*fixed* in streams-0.9.2.2
strss7 001. 2007-03-05T15:58:14-0700
For some reason the package was always building and installing the libxnet texinfo document
which was keeping the RPM from installing after the strxnet package. This was fixed in
doc/manual/Makefile.am with the addition of a ‘WITH_XNET’ conditional.
*fixed* in strss7-0.9a.6
strinet 002. 2007-03-05T01:24:13-0700
RPMs built on 2.4 kernels have using the ‘%dev’ construct for RPM instead of installing devices
using the init scripts. RPM complains loudly because the dev package defines some of the same iBCS
devices (e.g. /dev/ipip) as we are attempting to install. In the meantime, use –force.
Fixed in strinet.spec to never build devices ala rpm for strinet package.
strnsl 001. 2007-03-05T01:21:21-0700
RPMs built on 2.4 kernels install the ‘include strnsl’ line to modules.conf when there
is no such directory installed by any of the rpms. This means that depmod complains
loudly about the missing directory. This was fixed for the current release.
streams 004. 2007-02-26T08:25:09-0700
Jérémy
Compostella pointed out error in clone.c. When an automatic clone minor device was unregistered, it
was unregistering the modid instead of the major number. This was not noticed because all OpenSS7
drivers have the same modid as major number (strconf does this automatically).
*fixed* in streams-0.9.2.2
streams 003. 2007-02-26T08:25:09-0700
Jérémy
Compostella pointed out syntax error in strsched.c that kept synqs from compiling properly.
*fixed* in streams-0.9.2.2
strcompat 001. 2007-01-12T11:40:15-0600
A bug in the mi_copyout(9) function was discovered by inspection. The function should
complete the last stage of a non-TRANSPARENT input-output control operation by returning an
M_IOCACK(9) message, but did not. This was fixed for release 0.9.2.5.
strsctp test-sctp_n -o 9.1 Sun, 29 Oct 2006 16:27:35 -0700
test-sctp_n -o 9.2 Sun, 29 Oct 2006 16:27:35 -0700
When the number of test packets is set to 300, we are crashing on high speed SMP HT box. This seems
to be a locking problem of sorts, or some flow control race condition. For now, the number of test
packets, TEST_PACKETS has been reduced from 300 to 30 to avoid the crash. Again, packet tests at IP
level should reveal this problem.
Note that there does not seem to be a problem with similar TPI tests, so the problem might be NPI
interface related after all.
strsctp test-sctp_n -o 7.1 Sun, 15 Oct 2006 06:22:05 -0600
I notice that when the message size in this test is larger than the receive window size on the
receiver, the receiver aborts the association after its window fills. If the message size is
reduced to just beneath the receive window size, the test case succeeds. So, it looks like we are
not handling zero window probes very well at all. For now I have just reduced the message size as
this is for interface testing not packet testing. Packet tests at IP level should reveal this
problem.
streams 002. 2006-09-24T20:02:00+0000
Discovered asynchronous thread cancellation inconsistencies in libLiS libpLiS by inspection during
documentation. isastream(2s), fattach(2) were not performing proper asynchronous
thread cancellation suppression so that these function contained a cancellation point when the
should not.
*fixed* in streams-0.7a.6.rc3
streams 001. 2006-07-05T21:54:49+0000
Fedora Core 5 reports a rwlock bug during udp module unloading as follows:
BUG: rwlock wrong CPU on CPU#0, rmmod/7515
Call Trace:
{rwlock_bug+100}
{_raw_write_unlock+88}
{:streams:unregister_strnod+211}
{:streams:unregister_clone+64}
{:streams:unregister_strdev+24}
{:streams_udp:udpterminate+26}
{sys_delete_module+406}
{system_call+126}
It appears that unregister_strnod(9) is scheduling while holding a write lock on
cdevsw_lock. This is probably in iput(9) called within cmin_del.
*fixed* in streams-0.7a.6.rc2
There were a number of places where sleeping functions were called with spin-locks held, causing the
CPU awaking from the sleep to sometimes be different from the CPU that took the lock. This was
buggy, so I reworked all of these cdev and fmod sections to handle spin locks properly. FC5/SMP on
HT no longer reports these bugs.
strinet 001.
Several test cases are failing sending messages. ICMP port unreachable errors are resulting. It
appears that the caching of destination addresses is somehow making the receiver think that it is a
connection-oriented stream!
7.6 Schedule
Current Plan
Current Plan
The OpenSS7 package is a mature collection of all of the OpenSS7 STREAMS and
protocol modules that builds all components on a wide range of supported Linux distributions and
kernels. The OpenSS7 package is a builds and validates all components against
a given distribution.
Therefore, the current plan for packaging is largely a maintenance plan. The
OpenSS7 Project intends to release regularly new versions of the
package that build and validate against upcoming releases of the supported Linux Distributions
available from major distributors and upcoming releases of the Linux kernel, both mainline and as
patched by major distributions. This release schedule is approximately every 3 to 6 months. More
recent corrections and support for new distributions and kernels can be obtained by sponsoring the
OpenSS7 Project and obtaining access to the live CVS repository (also
available as a git repository).
Two significant plans for the package include providing cross-compiling support for more
cross-platform development distributions, such as the Denx ELDK. Also, support for real-time
distributions such as Montavista Linux and RT releases of SuSE and RedHat are within the scope of
the development plan.
No additional components are currently planned although development within the existing components
are planned. See the section for the component below, for a current development plan for a specific
component.
STREAMS Current Plan
STREAMS Current Plan
There are not many things left to be done on the production Linux Fast-STREAMS component. As of the
streams-0.9.3 release, performance modifications are complete. The component now exhibits
performance on STREAMS-based pipes and TPI drivers that is significantly (factor of 2 or more)
superior to that experienced by legacy Linux facilities.
Therefore, the current plan for Linux Fast-STREAMS is largely a maintenance plan. Items on the todo
list, below, will be picked up as time permits. The OpenSS7 Project intends to release regularly
new versions of Linux Fast-STREAMS that build and validate against upcoming releases of the
supported Linux Distributions available from major distributors and upcoming releases of the Linux
kernel, both mainline and as patched by major distributors. This release schedule is approximately
every 3 to 6 months. More recent corrections and support for new distributions and kernels can be
obtained by sponsoring the OpenSS7 Project and obtaining access to the live CVS repository (also
available as a git repository).
One development activity in the works for Linux Fast-STREAMS is to provide integral support for more
embedded cross-platform development systems such as the Denx ELDK, as well a existing and emerging
RT kernels such as Montavista and the upcoming SuSE and RedHat RT kernels. This is a significant
undertaking and will only be embarked upon when the OpenSS7 Project is given free access to these RT
kernels and distributions.
COMPAT Current Plan
COMPAT Current Plan
There are not many things left to be done on the production OpenSS7 STREAMS Compatibility Modules
component. The current plan for the component is largely a maintenance plan including support for
current distributions and kernels.
There are currently a large array of Solaris DDI compatibility functions that are not implemented;
however, there have not been many requests for this capability. Perhaps the advent of OpenSolaris
has forstalled porting of many drivers to Linux, but, regardless of the cause, there is just not a
demand. If there are any functions that you need the OpenSS7 Project to support that are not
currently supported in one of the compatibility modules, please request support for them on the
openss7-develop mailing list.
BCM Current Plan
BCM Current Plan
The OpenSS7 Project has made several stabs at making this component available and providing it in a
production grade form. All attempts are currently incomplete. All in all there does not appear to
be sufficient interest in this capability to actually fund the work. Therefore, this component will
remain incomplete until some entity can justify funding the remainder of the development. The
OpenSS7 Project remains committed to the open source model and providing this support runs somewhat
against that. However, if your organization has a pressing need for this capability and can offer
funding for its completion, please contact the project on the openss7 mailing list.
TTY Current Plan
TTY Current Plan
This component is still incomplete. It is missing a fully functional ldterm module. Also,
performance testing of STREAMS-based pipes from the Linux Fast-STREAMS indicates that STREAMS-based
pseudo-terminals could exhibit far superior performance to that exhibited by the legacy Linux (SVR 3
style) pseduo-terminals. To accomplish this requires fully implementing ldterm, creating validation
test suites, and peformance analysis and comparison with legacy Linux mechanisms.
This component is not currently a priority for the OpenSS7 Project, which is focussed on more
telecom-specific protocol stacks and capabilities. Nevertheless, if completion of this component is
important in your industry and your organization is able to fund further development or contribute
the missing items, contact us on the openss7-develop mailing list. Until funding or a mandate
surfaces, this component will likely continue as a proof-of-concept only. It will be maintained in a
compilable and installable state (that is, it will be updated for current Linux distributions and
kernels) on the same basis as other components in the OpenSS7 package.
CHAN Current Plan
CHAN Current Plan
This component, which contains hard-switch or MG capabilities is not currently planned. Of priority
is the production deployment of soft-switch or MGC and Signalling Gateway components from the
SIGTRAN, SS7 and VOIP components. This component will only receive maintenance
releases until those priorities have been sufficiently met (over the course of Summer 2009).
XNS Current Plan
XNS Current Plan
This component is mature and complete and in production release. The current plan is to provide
only maintenance releases supporting more recent Linux distributions, kernels and tool chains as
they evolve. Expect public maintenance releases on a 3 to 6 month cycle.
XNET Current Plan
XNET Current Plan
This component is mature and complete and in production release. The current plan is to provide
only maintenance releases supporting more recent Linux distributions, kernels and tool chains as
they evolve. Expect public maintenance releases on a 3 to 6 month cycle.
NSL Current Plan
NSL Current Plan
Current plans are to just maintain this component for recent distributions, kernels and tool chains.
Although at some point the relation of this component to TI-RPC 2.8 needs to be worked out, when that
will happen is not currently on a schedule. I do not really know how much of a requirement there is
for ONC RPC running over other transports such as ISO transports and SCTP transports, although it
would surely be interesting to run NFS4 over SCTP.
This component is not currently a priority for the OpenSS7 Project, which is focussed on more
telecom-specific protocol stacks and capabilities. Nevertheless, if completion of this component is
important in your industry and your organization is able to fund further development or contribute
the missing items, contact us on the openss7-develop mailing list. Until funding or a mandate
surfaces, this component will likely continue as a proof-of-concept only. It will be maintained in a
compilable and installable component (that is, it will be updated for current Linux distributions and
kernels) on the same basis as other components in the OpenSS7 package.
SOCK Current Plan
SOCK Current Plan
This component is still incomplete. It is missing a fully functional Stream head socket library,
module or driver implementation. Also, performance testing of STREAMS INET drivers indicates that
STREAMS-based networking components could exhibit far superior performance to that exhibited by
legacy Linux sockets. To accomplish this requires fully implementing socklib(3),
sockmod(4) module or socksys(4) driver, creating validation test suites, and
performance analysis and comparison with legacy Linux mechanisms.
This component is not currently a priority for the OpenSS7 project, which is focussed on more
telecom-specific protocol stacks and capabilities. Nevertheless, if completion of this component is
important to your industry and your organization is able to fund further development or contribute
the missing items, contact us on the openss7-develop maling list. Until funding or a mandate
surfaces, this component will likely continue as a proof-of-concept only. It will be maintained ina
compilable and installable component (that is, it will be updated for current Linux distributions and
kernels) on the same basis as other components in the OpenSS7 package.
INET Current Plan
INET Current Plan
This component is mature and complete and in production release. The current plan is to provide
only maintenance releases supporting more recent Linux distributions and kernels as they evolve.
Expect public maintenance releases on a 3 to 6 month cycle.
SCTP Current Plan
SCTP Current Plan
This component is mature and complete and in production release. The current plan is to provide
only maintenance releases supporting more recent Linux distributions, kernels and tool chains as
they evolve. Expect public maintenance releases on a 3 to 6 month cycle.
X25 Current Plan
X25 Current Plan
This component was initially started to provide managment interfaces to platforms using the OpenSS7
protocol stacks (CMIP and CMOT interfaces) using SS7 GDMO and other GDMO. It was considered pulling
some of the old isode package into this component to provide some GDMO facilities.
Since then, it was discovered that these ISO protocols are still very important to a number of
industries on Linux and Linux Fast-STREAMS. These industries are the Aviation and Financial
industries. Closer to the heard of telecommunications is the applications of aircraft to ground
communications for the Aviation industry.
While the OpenSS7 Project’s focus over the Summer of 2009 is going to be soft-switch enabling
protocols, that may change if the Aviation industry steps up to this component with some funding to
complete the work or by contributing changes, improvements or development to this component.
Otherwise, expect this component to receive only maintenance releases over the next 8 months or so.
ISO Current Plan
ISO Current Plan
This component was initially started to provide managment interfaces to platforms using the OpenSS7
protocol stacks (CMIP and CMOT interfaces) using SS7 GDMO and other GDMO. It was considered pulling
some of the old isode package into this component to provide some GDMO facilities.
Since then, it was discovered that these ISO protocols are still very important to a number of
industries on Linux and Linux Fast-STREAMS. These industries are the Aviation and Financial
industries. Closer to the heard of telecommunications is the applications of aircraft to ground
communications for the Aviation industry.
While the OpenSS7 Project’s focus over the Summer of 2009 is going to be soft-switch enabling
protocols, that may change if the Aviation industry steps up to this component with some funding to
complete the work or by contributing changes, improvements or development to this component.
Otherwise, expect this component to receive only maintenance releases over the next 8 months or so.
ISDN Current Plan
ISDN Current Plan
This component is lower down on the priority list. Current focus is on pushing through the
SIGTRAN, SS7 and VOIP components instead. This components sits at about the
same status as the CHAN component. there exists modules and drivers in this component that
have not yet been publicly released and are only available to sponsors of the OpenSS7 Project on the
CVS archive. When the project gets back to this component (sometime 2H2009), the plan will be to move
the private modules and drivers into the public release, place conformance validation test cases
around them and release this component as production grade.
SS7 Current Plan
SS7 Current Plan
The current plan includes the public production release of SCCP, ISUP and TCAP components. MTP3 has
not yet been publicly released and is not currently scheduled. (Implementing the AS-side of M3UA is
taking precedence.) The first public production releases of SCCP, ISUP and TCAP are planned for the
end of July 2009. This will be followed by lab and limitied field trial testing with a lead
customer in August and production deployment in the lead customer’s network in 1Q2009. Expect that
over the next 8 months releases of this component will include major new development and validation
testing as well as including SCCP, ISUP and TCAP components that have nor heretofore been publicly
released.
SIGTRAN Current Plan
SIGTRAN Current Plan
The current plan of the next several months (over the summer of 2009) is to actively move this
component forward. This consists of the following:
Move SIGTRAN modules and drivers that have not yet been publicly released into the public release.
Write test cases for complete AS-side implementations of all of the UAs (including ISUA and TUA).
Perform production testing of the UAs against Tekelec Eagle and Cisco ITP equipment.
Rigorous lab and limited field testing of AS-side components.
Production deployment in customer’s network for 1Q2009.
Note that M2PA is complete. Aside from that, the order of testing and implementation will be M3UA
followed by M2UA or SUA and then TUA, IUA (including V5UA and GR303UA) and ISUA.
Production public releases of the AS side of M3UA can be expected by the end of July 2009.
ATM Current Plan
ATM Current Plan
This component was initially started to provide managment interfaces to platforms using the OpenSS7
protocol stacks (CMIP and CMOT interfaces) using SS7 GDMO and other GDMO. It was considered pulling
some of the old isode package into this component to provide some GDMO facilities.
Since then, it was discovered that these ISO protocols are still very important to a number of
industries on Linux and Linux Fast-STREAMS. These industries are the Aviation and Financial
industries. Closer to the heard of telecommunications is the applications of aircraft to ground
communications for the Aviation industry.
While the OpenSS7 Project’s focus over the Summer of 2009 is going to be soft-switch enabling
protocols, that may change if the Aviation industry steps up to this component with some funding to
complete the work or by contributing changes, improvements or development to this component.
Otherwise, expect this component to receive only maintenance releases over the next 8 months or so.
VOIP Current Plan
VOIP Current Plan
The current plan of the next several months (over the summer of 2009) is to actively move this
component forward. This consists of the following:
Implementation and testing of MGCP (MGC-side) using the MGI and TCP transport from the
INET component.
Implementation and testing of MEGACO/H.248 (MGC-side, binary format) using the MGI and SCTP
transport from the SCTP component.
Implementation of SIP-T and SIP call control using the CCI and TCP transport from the
INET component and later SCTP transport from the SCTP component.
Perform production testing of MEGACO/H.248 and MGCP against the Veraz iGATE, the Cisco 5400 and the
Sonus Media Gateways.
Rigorous lab and limited field testing of the MGC-side components.
Production deployment in customer’s network for 1Q2009.
The order of testing will be MEGACO/H.248 and then SIP-T and SIP followed by MGCP. Production
public releases of the MGC side of MEGACO/H.248 and SIP-T acan be expected by the end of July 2009.
Things to Do
Things to Do
- Packaging.
Get master build package working better. Currently the master build package does not build a master
tarball or RPM distribution, which would be nice, only individual RPMs for subpackages.
- Cross-testing framework.
We have nice autotest test suites that are fine for native builds, but for cross-compile builds, it
would also be nice to cross-test. We can accomplish this nicely within the autoconf framework using
DejaGNU. DejaGNU configured under the STREAMS, but we need a more general autoconf .m4 fragement check
for the existence of DejaGNU, and automake and DejaGNU expect wrappers for the existing test
programs (and integration into the make check-DEJAGNU target). Then we could cross-build the
package and then execute the test scripts on the result on a remote board using DEJAGNU.
- Distributed testing framework.
Because these are mostly communications protocols implemented using STREAMS, it is important to be
able to do consistent distributed testing and validation of the protocol implementations. We can
perform much validation using Ferry-Clip approaches (linking or pushing STREAMS-based pipes beneath
drivers or modules), however, acceptance and performance testing would benefit from a distributed
framework. Perhaps the most direct yet general approach to this is TETware from OpenGroup and is
used for POSIX (and XNS 5.2, by the way) test suites from OpenGroup. Although netperf incorporates
its own client-server subsystem, TETware provides these mechanisms separately. TETware also
provides mechanisms for test case synchronization points between distributed systems that makes
distributed conformance test cases quite possible. Note that TETware does not really require any
external tools but does require network access and installation on the target systems (unlike
DejaGNU that can execute test cases over a serial port if necessary).
- Dynamic configuration.
Automake files (Makefile.am) are too static. The strbcm package needs the list of sources and
objects to be rather dynamic. It would be nice to convert all packages to the same approach. We
could perhaps use strconf-sh to generate Makefile.in fragments at configuration time and then
include them in a far more general main Makefile.am file.
- Merge sub-packages.
I really want to put all these packages back together, it is too time consuming maintaining the
various administrative files for each of seven or so packages.
• streams-0.7a.5
• strcompat-0.9.2.4
• strutil-0.9.2.4
• strxns-0.9.2.4
• strxnet-0.9.2.9
• strinet-0.9.2.4
• strsctp-0.9.2.6
• netperf-2.3.2
The result will be just a streams-0.9.4 release. The only two (STREAMS) packages left will be
strbcm and strss7.
STREAMS Things to Do
STREAMS Things to Do
- Support for RT kernels. This is a little more than just having the STREAMS scheduler run as a
non-RT process kernel thread, which it does now, and which is trivial. (The existing package should
compile and run against these kernels with minor modification in this event.)
More to the point is working the light-weight STREAMS scheduler and service procedures into a
prioritized scheme where service procedures run as real-time, yet pre-emptable tasks. In contrast
to the current scheme, it is likely that the approach would be to either spawn multiple kernel
threads for the STREAMS scheduler at different priorities, or to alter the priority of the STREAMS
scheduler in response to the scheduling of specific queues at specific priorities. A design is not
really possible until the intricacies of upcoming RT kernels are discovered.
TODO:
Provide support for RT kernels.
- Per cpu data:- I am still using the older approach of using cache line aligned arrays for per-cpu
data. This, of course, does not fully utilize NUMA architectures. For NUMA architectures we need
to use the per-cpu utilities provided by the 2.6 and 3.x kernel. I haven’t touched converting this
yet.
Also, there are several NUMA supporting STREAMS utility functions (allocb_node, etc.) that need to
be supported yet.
TODO:
Convert cacheline aligned arrays to NUMA per-cpu data on 2.6 and 3.x kernels. Complete NUMA
supporting STREAMS facilities.
- Provide support for assigning a processor affinity for queue pairs. The current STREAMS scheduler
will schedule a queue enabled as a result of, for example, a put() on the same processor that
performed the action that caused the enable. This has been adequate for event driven systems.
However, for pipelined hard real-time, better processor instruction cache efficiency and concurrency
might be gained by assigning portions of the pipeline to different processors, so that, for example,
when a put is performed to a queue, that the queue will become enabled against the process with
which it has an affinity rather than the enabling processor. This might permit assigning a
different processor affinity to each queue-pair in a pipeline to exploit concurrency in the
pipeline.
TODO:
Add an optional processor affinity to the STREAMS scheduler.
- Split include/sys/streams/stropts.h by architecture. There is conflicting numbering on the
standard STREAMS input-output controls:
System V Release 4 UNIX® vendors use one set and OSF
UNIX® vendors use another. Namely HP-UX, OSF/1.2, AIX,
Mac OpenTransport use OSF numbering, whereas IRIX, Solaris, UnixWare and
others use SVR4 numbering. So, for HPPA, Alpha, PowerPC, we should use the OSF numbering.
I know that it is a fall-back to the SVR4 way of separating architectural differences by UNIX vendor
(if it is HPPA, it must be sold by HP and it must be HP-UX running on it, for example), but even the
Linux kernel is victim to this (many ioctls and some errno numbering is split this way). It is
completely entrenched in GNU autoconf’s config.guess.
TODO:
Split include/sys/streams/stropts.h by processor architecture.
- A similar numbering mismatch occurs for many of the message block types.
TODO:
Split include/sys/streams/streams.h by processor architecture.
- Implement I_EGETSIG(7) and I_ESETSIG(7). These are Solaris enhanced
version of the I_GETSIG(7) and I_SETSIG(7) STREAMS input-output controls.
The difficulty with their implementation is that the entire signal handling setup inside the Stream
head code is geared toward the calling process and needs to be adjusted to be general enough for
any process or process group. Until then, Linux file asynchronous I/O is supported.
PARTLY DONE:
Wrote the manual pages and added them to the build. Placed function skeletons that return
[EOPNOTSUPP] for these functions in the Stream head.
Rather than write offset and padding, why not provide a flag (e.g. SO_SKBUFF) to indicate to the
stream head to allocate an sk_buff with the message block and share buffers between mblk and
sk_buff, then, the sk_buff can be used without allocation in the bottom half. esballoc() and
alloc_skbuff() can be used to set up the message block. dup() could be made aware of the hidden
sk_buff and increment the shared sk_buff count as well. Also, msgpullup() and pullupmsg() could be
made aware of message blocks containing sk_buffs and have them do the appropriate thing.
The other thing that is needed is some way to tell the other end of a loopback connection that the
sk_buff it has received already has an mblk attached to it as above. Then the message block could
be simply passed upstream and one would not need to be esballoc’ed for it.
Another thing is to provide the ability to partial checksum and copy data from user into these
sk_buffs, but setting an SO_CSUM flag along with the SO_SKBUFF flag to indicate the type of checksum
to perform.
The combination of the above three items should provide some serious performance gains for Linux
networking based stream heads.
PARTIALLY DONE:
Item (1) is done and complete. The 2nd generation UDP and RAW drivers are already using it. Item
(2) and (3) remain.
- Had another look at specfs, devfs and udev. It looks like we can create minor device nodes within
/dev (not just /dev/streams) using devfs or udev. Again, this doesn’t do everything that specfs
does. specfs will demand load when an attempt is made to open a non-existent character device.
Nevertheless, we can describe a "streams" class for udev and when a module registers a minor device
node, we can have udev create that device node and provide permissions by adding our files to the
/etc/udev/rules.d and /etc/udev/permissions.d directories.
Therefore, on a udev system, we should make strconf-sh create the necessary rules.d and
permissions.d file entries. register_strnod will be modified to create a udev instance within the
stream class matching the rules.d and permissions.d entry when creating a minor device node within
the specfs.
On a devfs system, register_strdev and register_strnod should perform devfs calls instead of calling
register_chrdev. That way minor device nodes will automatically appear at least once the module is
loaded.
TODO:
rationalize specfs to devfs and udev
- Have the STREAMS subsystem register a panic notifier on 2.6 and 3.x kernels to be able to recover
from panics caused by misbehaving STREAMS modules or drivers.
TODO:
Register panic notifier.
- Kernel objects are another thing. For 2.6 or 3.x kernels, we need to hold our data structures in
the kobject manner so that the /sys file system is usable. This requires another adaptation layer
because 2.4 kernels do this in a completely different way. Much of our /proc file system stuff
needs to move into /sys for 2.6 or 3.x kernels but stay the same for 2.4 kernels.
The /sys file system does not really do much for STREAMS. The /dev/streams specfs file system does
more for us.
SKIPPED.
COMPAT Things to Do
COMPAT Things to Do
- Implement the AIX strtune() command.
*todo*
- I would really really like a set of rmallocmap(), rmalloc(), rmalloc_wait(), rmfree(), rmfreemap()
functions so that drivers could stop using the kmem_cache functions but could acheive similar
effect.
*todo*
- Work in MUTEX_ALLOC(), MUTEX_DESTROY(), MUTEX_LOCK(), MUTEX_MINE(), MUTEX_OWNED(), MUTEX_TRYLOCK(),
MUTEX_UNLOCK() from IRIX into irixcompat.c.
*todo*
- Work in streams_interrupt() and STREAMS_TIMEOUT() from IRIX into irixcompat.c.
*todo*
- Hey, here’s an idea for testing Solaris compatibility: take an OpenSolaris source file for a STREAMS
driver and compile and test it under Linux with no (or minimal) source code modifications!
*todo*
- Write test programs and test suites. There are really not any test programs or test suites
available for the OpenSS7 STREAMS Compatibility Modules package as of strcompat-0.9.2.2.
*todo*
- Not all compatibility functionality is implemented. There are a large number of Sun DDI functions
applicable to STREAMS that have not been fully implemented. Also, the Sun configuration management
mechanism is not yet fully implemented and neither is that for AIX. Also, there is a large group of
SVR 4.2 compatible functions that are not directly STREAMS related but are part of the DDI/DKI and
should be implemented to provide abstraction from Linux internals as well as the ability to link
binary modules.
*moved*
(Note that the ability to link binary modules has been moved to is own strbcm package.)
- Linking of binary modules is not yet supported. This is the place (strcompat) where binary modules
should be permitted to be loaded against Linux Fast-STREAMS, because the binary compatibility
interface modules are defined here. There is the beginnings of an strconf script output to generate
a C-language wrapper file that will link with a binary object file to generate a loadable module
that could load under Linux Fast-STREAMS.
*moved*
(Note that the ability to link binary modules has been moved to is own strbcm package.)
- Documentation. The documentation is trailing a bit. I have thousands of manual pages written,
however, some are sparse or incomplete. Also, the manual and the STREAMS Porting Guide needs a
bunch of work.
*todo*
Did a bunch of work on the manual, however, there is still a lot of work on a STREAMS Porting Guide
to be done.
BCM Things to Do
BCM Things to Do
- Testing. This package is completely untested. One way to test compatibility is to take a set
of frozen binary modules and drivers from the release and place them in a test directory.
- The strbcm package is currently incomplete. The purpose of the package was to move STREAMS binary
compatibility module capabilities outside of the STREAMS release package. As Linux Fast-STREAMS has
become production grade in terms of both performance and conformance, it is no longer necessary to
keep these packages separate and they can be combined once again (or still) with Linux Fast-STREAMS.
This package; however, might has some use still outside of Linux Fast-STREAMS if only because it
provides a separable way of incorporating 3rd party binary modules.
TTY Things to Do
TTY Things to Do
- Testing. This package is completely untested.
*todo*
- Create a library libtty(3) to hold the library functions for use with
this package:
- Create an ldterm(4) Line Discipline for Terminals
STREAMS module. This item remains to be done. Al that is in place
right now is a skeleton module.
*todo*
The openss7 package is currently incomplete.
The purpose of the package was to provide STREAMS terminal capabilities
for Linux Fast-STREAMS. The package will only build and install with Linux
Fast-STREAMS
If someone is interested in this package, a contribution of a working
ldterm(4) module would be good. Also, testing could be performed.
CHAN Things to Do
CHAN Things to Do
- Testing. This package is completely untested.
This remains to be done.
- Actually implement all of the package.
- Copy all of the channel drivers, multiplexers and switching drivers as well as
media gateway drivers from the strss7 package and place it here.
Note that this package should load before the strxns package because it
provides channels that can be used for hdlc links and data links and the
strxns package provides the CDI and DLPI interfaces. It is possible that the
CDI interface should be moved here.
XNS Things to Do
XNS Things to Do
- I want to write a NetFilter pseudo-device driver that will install and control netfilter hooks for
performance testing. It will do things like packet drops, checksum errors, packet duplication,
packet delay, and combinations, for a specified range of addresses and/or protocols. Also a set of
user-space utilities (C language programs) to permit the control of the filters. The purpose is to
be able to do a wide range of performance testing on simulated networks that are simply loop back
devices. This would permit performance test programs (such as netperf) to be used for testing
special network conditions on SCTP (for example), and will also allow for comparison tests.
The strxns package contains several GPL’d modules and drivers originally included in the STREAMS
releases that were removed to this package so that they could be used with Linux Fast-STREAMS.
- Test. Almost none of the modules or drivers in this package have been tested thoroughly against
Linux Fast-STREAMS. One of the primary reasons for this is that The OpenSS7 Project
does not really use any of these modules or drivers.
- This might be a useful place to drop all of the DLPI drivers from the strss7 package, particularly
those for X.25, Frame Relay, and ISDN LAPD and LAPB.
XNET Things to Do
XNET Things to Do
The texinfo manual, libxnet.texi, is incomplete. For the time being, the manual pages,
starting with libxnet(3), are the definitive documentation. It would be nice to also
provide these library manual pages as a printable manual, however, the project has not yet found the
time to complete this manual.
*todo*
There is an XTITRACE option the was associated wtih the XTI library that provided the abilty to
record trace information to a temporary file and then display or print it with an xtitrace
user program. This capability is not yet implemented in this XTI library and remains to be done.
*todo*
Need to remove the following functions: t_sndopt(3), t_sndvopt(3),
t_rcvopt(3) and t_rcvvopt(3); as they are non-standard and non-portable. Instead
use the following functions: t_sndudata(3), t_sndvudata(3), t_rcvudata(3)
and t_rcvvudata(3); because they have precisely the same argument templates as the other.
These functions are described in the OpenGroup documentation as inapplicable to connection-oriented
transports, however, we could relieve that restriction for SCTP. The characteristics to check is if
T_CLTS, okay, T_COTS or T_COTS_ORD, only okay if the tsdu_size is not T_INVALID (as it is for TCP).
(It would be okay to be T_INFINITE as it is for SCTP.)
*todo*
They may have already been removed.
Verify this.
They certainly have to be implemented this way yet.
The XTI/TLI library is now largely in maintenance mode. Not much special development is planned.
- Full ATM Support. This is an item where the XTI implementation is lacking. When we provide full
TPI ATM support under the strss7 package, then this item will be investigated.
*todo*
NSL Things to Do
NSL Things to Do
Fedora 7 has a libtirpc library that uses the /etc/netconfig files. To avoid conflicts, the
installation scripts now avoid overwriting this file. An interesting thing is that the libtirpc
implementation is taken from TI-RPC 2.3 when there is a TI-RPC 2.8 available. In generating an
strrpc package, it should replace this broken libtirpc library with a TI-RPC 2.8 library supporting
STREAMS using this strnsl package.
*todo*
The package still needs to be internationalized.
*todo*
This implementation of the Network Selection facility and Name-to-Address mapping allows direct use
of TI-RPC for Linux. The primary benefit of this is the ability to use TI-RPC code directly without
significant and thus support upper level services such as NFS Version 4. Another amazing
possibility is to not only immediately run NFS Version 4, but also to run it over SCTP. A todo item
is to take the TI-RPC 2.8 release and port it to Linux Fast-STREAMS. This might best be approached
with a separate strrpc package, or addressed directly by this package.
*todo*
The texinfo manual, libxnsl.texi, is incomplete. For the time being, the manual pages,
starting with libxnsl(3), are the definitive documentation. It would be nice to also
provide these library manual pages as a printable manual, however, the project has not yet found the
time to complete this manual.
*todo*
This package is largely untested. A conformance test suite and some test cases need to be written.
*todo*
SOCK Things to Do
SOCK Things to Do
- Testing. This package is completely untested.
*todo*
- Create a socksys(4) Socket System STREAMS driver.
*todo*
- It would be interesting to perform some Netperf and Iperf performance tests against
STREAMS-based network drivers supporting Transport Provider Interface (TPI) and
Sockets using this socket system. Without sockmod(4) and libsocket it was
only possible to use Netperf for performance testing, and then only using the XTI tests.
- Create a sockmod(4) Socket Module STREAMS module.
*todo*
- Move already written code from the stacks or strss7 directories
into the src directory.
*todo*
The openss7 package is currently incomplete.
The purpose of the package was to move STREAMS socket capabilities outside of the
STREAMS release package. As Linux Fast-STREAMS has already shown production grade in terms of
both performance and conformance, it is no longer necessary to keep these packages separate and they
can be combined once again (or still) with Linux Fast-STREAMS.
INET Things to Do
INET Things to Do
- Loop back devices (ticlts, ticots, ticotsord) are currently implemented in the inet(4)
driver using UNIX domain sockets and the XTI over sockets approach. It should be straightforward to
implement these loopback devices directly in STREAMS without involving sockets. These second
generation loopback drivers need to be written yet.
*todo*
- Implement pseudo-connection oriented modes in INET(4) driver as well as udp2(4) and rawip2(4)
drivers. Document use of pseudo-connection oriented modes for UDP and RAWIP. Pseudo-connection
oriented modes permit a connectionless (T_CLTS) provider such as udp to provide the appearance of
connection oriented service. This makes conversion from the Sockets API to XTI API easier.
Note that this is also very applicable to MTP (quasi-associated signalling such as ISUP) and
SCCP protocol class 0 and 1 and TCAP.
*todo*
- It might be worth retrying the netperf(1) performance test on the second generation UDP driver with
this pseudo-connection oriented mode in place. You see, the netperf tests for UDP sockets performs
a connect(3).
*todo*
- Implement pseudo-connectionless modes in INET(4) driver as well as sctp(4) drivers. Document use of
pseudo-connectionless modes for SCTP (not really applicable to TCP). Pseudo-connectionless modes
permit a connection-oriented (T_COTS) provider such as sctp to provide the appearance of
connectionless service. This makes support for the SCTP one-to-many model easier. Also, it
provides a way (t_sndudata(3), t_sndvudata(3)