= Release Notes for ION 3.3.1 =
May 1, 2015
= GENERAL =
The ION (interplanetary overlay network) software is a suite of communication
protocol implementations designed to support mission operation communications
across an end-to-end interplanetary network, which might include on-board
(flight) subnets, in-situ planetary or lunar networks, proximity links, deep
space links, and terrestrial internets. Included in the ION software
distribution are the following packages:
- ici (interplanetary communication infrastructure), a set of libraries
that provide flight-software-compatible support for functions on which
the other packages rely, such as dynamic memory management, non-volatile
storage management, and inter-task communication via shared memory.
The ici libraries are designed to make the porting of IPN software to
multiple operating systems - Linux, VxWorks, Solaris, etc. - as easy as
possible. Ici now includes zco (zero-copy object), a library that
minimizes the copying of application data as it is encapsulated in
multiple layers of protocol structure while traversing the protocol
- bp (bundle protocol), an implementation of the Delay-Tolerant
Networking (DTN) architecture's Bundle Protocol.
- ltp (licklider transmission protocol), a DTN convergence layer protocol
for reliable transmission over links characterized by long or highly
- dgr (datagram retransmission), an alternative implementation of ltp
that is designed for use over the Internet protocol stack. dgr
implements congestion control and is designed for relatively high
- bssp (bundle streaming service protocol), a DTN convergence layer protocol
for reliable transmission of streaming data.
- ams - an implementation of the CCSDS Asynchronous Message Service.
- cfdp - a class-1 (Unacknowledged) implementation of the CCSDS File
- bss - a Bundle Streaming Service (BSS) for disruption-tolerant reliable
data streaming. BSS supports real-time streaming applications by
passing the bundle payloads to the associated application for immediate
display of the most recent data while storing all bundle payloads
received into a database for user-directed playback.
- dtpc (delay-tolerant payload conditioning), an application framework
providing TCP-like support for end-to-end retransmission and data delivery
in transmission order without duplication or omission.
- cgr - Contract graph routing: a method of dynamic routing designed for
space based applications of ION, but still usable for terrestrial
applications. It computes routes using scheduled communication and deals
with time-varying network topology.
- brs - Bundle relay service: provides interconnectivity between networks
that do not allow servers (those behind NAT for example). For more
information, check man brsscla and man brsccla.
= NOTES ON RELEASE 3.3.1 =
- SourceForge Bug #37: The ION tutorial has been updated.
- SourceForge Bug #73: Fixed two bugs introduced by the dynamic generation of
LTP reports. See the SourceForge Bug #47 entry and the ltprc(5) man
page for details on dynamic LTP report generation.
1.) The computation of the segment loss rate (errors per segment) was
incorrect and now uses the following corrected formula:
segmentLossRate = 1.0 - ((1.0 - maxber) ** (maxSegmentSize * 8))
2.) The retransmission limit on the number of times any single report or
checkpoint may be retransmitted is now computed dynamically as a
function of segment loss rate rather than a static number.
- SourceForge Bug #74: Obsolete IPCs are now properly reclaimed when running
under Windows and SVr4.
- ION now tracks the release of semaphores in winion's array of IPC handles
as well as the semaphore tables themselves.
- Previously, the release of obsolete semaphores was not tracked by the winion
daemon, which could be easily saturated given low semaphore limits and
recently-expanded semaphore usage in ION (CGR, ionStartAttendant).
- SourceForge Feature Request #40: The bping ION application has been ported to
Windows. A dtnperf port for Windows is slated for a later release.
- SourceForge Feature Request #42: ION now resolves host names when socket
connections are made rather than resolving them all on ION startup.
- Fixed a memory leak in CFDP that could occur when TargetFFS is defined.
- Several fixes have been applied in response to the successful completion of
CCSDS BP interoperability testing.
- Delay Tolerant Payload Conditioning (DTPC) has been updated for conformance
- The CGR algorithm has been updated to omit downstream contacts that end
before initial contact on route.
- ION no longer requires pdfjam to build man pages into the ION documentation.
= NOTES ON RELEASE 3.3.0 =
- SourceForge Bug #47: ION's LTP implementation now computes limits on
"report" segment generation dynamically, based on block size, segment
size, and anticipated bit error rate. This enables LTP to "try
harder" to complete block transmission when rates of data loss are
high. See the notes below on configuration interface changes.
- SourceForge Bug #54: Fixed bug that could cause multithreaded applications
under VxWorks to refuse bundles with the error message:
"Can't receive: not owner of endpoint."
For this purpose, a thread that will only send (never receive) bundles
can use a BpSAP created by calling bp_open_source rather than bp_open;
in this circumstance, sending and receiving threads may use different
bpSAPs tagged with the same endpoint ID.
IMPORTANT: see the notes below on application interface changes!
- SourceForge Bug #62: Fixed several miscellaneous implementation bugs in the
Contact Graph Routing (CGR) engine dealing with Earliest Transmission
Opportunities (ETO) and Overbooking management (OB).
- SourceForge Bug #63: Removed restrictions on possible CBHE node and
MAX_CBHE_NODE_NBR may now be any unsigned long number (2^64-1).
MAX_CBHE_SERVICE_NBR may now be any unsigned int number (2^32-1).
- SourceForge Bug #65: Removed duct-level support for LTP "green" transmission.
"Green" transmission is now selected on a bundle-by-bundle basis via the
bundle's extended class of service options.
- SourceForge Bug #67: Updated the Previous Hop Node extension block (PHN)
implementation to be compliant with the specification in RFC 6259.
The sending node's EID is now represented by two distinct NULL-terminated
strings (Scheme Name and SSP) rather than one NULL-terminated EID.
- SourceForge Bug #68: Fixed bug where the sockets of links utilizing STCP
could prematurely close if the other side did not respond for several
hours. ION now respects the EHOSTUNREACH errno value and periodically
attempts to reconnect rather than closes the socket.
- SourceForge Bug #70: Fixed bug with ION's uClibC macros that caused ION
compilation to fail in environments that use uClibC.
- SourceForge Feature Request #13: Optimizations have been made to improve
ION's reactive forwarding implementation:
- When a bundle is reforwarded due to expiration of its xmitOverdue timer
ION now considers the possibility that forwarding the bundle back to the
node it received the bundle from may now actually be the optimal route.
- ION now sends Custody Refused signals back to the sending nodes when
forwarding the bundle is not possible, even when custody transfer was
not requested. This enables a mechanism for backtracking the bundle
through the network when forward progress through a route is blocked.
- SourceForge Feature Request #19: ION now supports Bundle-in-Bundle
Encapsulation (bibe) per the draft-irtf-burleigh-bibe Internet Draft.
Bundle-in-Bundle Encapsulation enables the Streamlined Bundle Security
Protocol (SBSP), which omits security destinations from the security
extension blocks, to function in cross-domain solutions by encapsulating
bundles whose destination is the selected security destination.
- SourceForge Feature Request #29: Optimizations have been applied to the ION
test suite to reduce the amount of time needed to initialize each test.
- SourceForge Feature Request #31: ION's public API is now more "const-correct"
which enables better interopability with C++ interfaces.
- SourceForge Feature Request #32: zero-copy-object space allocation has been
enhanced to enable bidirectional flow control on convergence-layer
protocols that back-propagate blocking on buffer space requests.
- SourceForge Feature Request #33: ION now supports probabilistic contacts.
These are contacts with probabilities less than 1.0 that could potentially
be handled by the CGR algorithms to enable the possibility for more
efficient routing decisions to be made by the CGR engine.
- ION now supports the Streamlined Bundle Security Protocol (SBSP) in place
of the Bundle Security Protocol defined in RFC 6257. For details,
- Fixes have been applied to the ION.pdf construction procedure to enable
proper formatting of the appended man pages.
- Man page creation can now be disabled.
Man pages are still built by default.
To disable man page creation, use "./configure --disable-manpages".
**Configuration interface changes**
Because buffer space for "zero-copy objects" in ION has been split into
separate pools for inbound and outbound data, the ionrc command for
managing "occupancy" has been split into two commands, "inbound"
and "outbound". See the ionrc(5) man page for details.
Migrating ION from standard Bundle Security Protocol to the new Streamlined
Bundle Security Protocol has entailed changing some of the ionsecrc
commands: "bsppibrule" is replaced by "bspbibrule", and "bsppcbrule"
is replaced by "bspbcbrule". See the ionsecrc(5) man page for details.
Limits on retransmission in LTP are now computed dynamically to account
for differences in bundle size, segment size, and bit error rate.
For this purpose, the default value for maximum bit error rate at a
given LTP engine is hard-coded to be 10^-6 (one uncorrected flipped
bit per million). This value can be overridden by the new ltprc
command for managing "maxber"; see the ltprc(5) man page for details.
**Application programming interface changes**
Again because of the splitting of ZCO buffer space into two pools, many
of the zco library function prototypes have been changed: in most
cases, an additional ZcoAcct parameter (ZcoInbound or ZcoOutbound)
has been added. Also:
- A new zco_status function has been added, to print a brief report
of the buffer status.
- New zco_extent_too_large and zco_get_aggregate_length functions
have been added to aid in resource management.
- Other new functions include zco_acct, zco_header_text, and
- Passing a negative value of extent length to zco_create or
zco_append_extent indicates that (a) the actual extent length
is the additive inverse of the value provided and (b) it is
asserted that this length does not violate the configured limits
on ZCO buffer space occupancy.
See the zco(3) man page for details of these changes.
Leveraging these upgrades to enable more flexible resource management,
the ionCreateZco and ionAppendZcoExtent function prototypes have
been modified and the ion function library now includes several
new functions that provide better control of "blocking" behavior
in ZCO buffer space allocation: ionStartAttendant,
ionPauseAttendant, ionResumeAttendant, ionStopAttendant,
ionRequestZcoSpace, ionShred. See the ion(3) man page for details
of these changes.
NOTE: The changes made to address SourceForge Bug #54 (described above)
have the potential to BREAK APPLICATIONS!
If your application code currently makes any use of the bundle
address that is returned when bp_send() is called, then YOU MUST
MAKE BOTH OF THE FOLLOWING CHANGES IN YOUR CODE:
1.) Use bp_open_source() with the "detain" flag set to 1 INSTEAD OF
bp_open() to obtain the BpSAP handle that you pass to
2.) Call bp_release() as soon as possible (for example, immediately
after passing the new bundles address to bp_track()) to
end the detention of any bundle created by passing that
detaining BpSAP handle to any invocation of bp_send().
If you need to receive bundles as well as send them, then the BpSAP
handle that you pass to bp_receive() must be a different handle that
is obtained by calling bp_open() in the usual way.
An additional daemon task named "bptransit" has been added to standard
ION operations. bptransit is responsible for presenting to the
forwarding daemon(s) bundles that were received from other nodes
(i.e., that reside in Inbound ZCO space) and are destined for yet
other nodes; in doing so, it migrates these bundles from Inbound
buffer space to Outbound buffer space on the same prioritized
basis as the insertion of locally sourced outbound bundles.
Management of the bptransit daemon is automatic. See the
bptransit(1) man page for details.
= NOTES ON RELEASE 3.2.2 =
- SourceForge Bug #32: Improved Windows support
- MinGW makefiles now build a wider array of ION applications.
- ION-based applications can now be developed in Visual Studio via the new
"winimplib.bat" batch script which creates import libraries suitable for
linking ION DLLs.
- See "BuildingIONonWindowsForUseWithVisualStudio.pdf" for documentation
on how to build ION-based applications in Visual Studio.
- SourceForge Bug #49: ION now sends a "Depleted Storage" custody refusal
signal back to the current custodian when an ION node lacks sufficient
ZCO space to contain a bundle.
- SourceForge Bug #50: ION now behaves more consistently across platforms
when ionadmin is unable to open its designated configuration file.
- The ionadmin application now considers being unable to open its
configuration file to be a serious error and will stop the ION
initialization routines at this point. This gives clearer and more
immediate feedback to the user that an error was encountered that they
must resolve to resume normal ION operation.
- Previously, ionadmin would load a default configuration if it was unable
to open its configuration file EXCEPT under vxWorks 6.3 PowerPC where
ionadmin would cease with a "can't open SDR config file" message.
- SourceForge Bug #51: The "ionconfig" man page has been updated.
Some examples of entries that were obsolete are as follows:
- The pathName parameter should not be encased in quotes. Previously, the
example showed a pathName that was encased in quotes.
- The default config flag is 13, which corresponds to
SDR_IN_DRAM | SDR_REVERSIBLE | SDR_BOUNDED
Previously, the documentation gave an incorrect default config flag of 1.
- The default wmKey is 65281. Previously, this was reported to be 65537.
- SourceForge Bug #52: The "bping" application has been updated for better
compatibility under VxWorks. This was made possible by adding an option
to run bping as a lightweight task with positional runtime arguments.
- SourceForge Bug #53: Fixed bug in command argument parsing in the
"bprecvfile" application under VxWorks. Previously the "a1" argument was
reused for both the "EID" and "maxFiles" fields.
- SourceForge Bug #55: Fixed bugs in the "bpcancel" application.
- The bpcancel application now prints a message when it is unable to
cancel the transmission of a bundle.
- The man page for the bpcancel application has been updated to clarify
that the application attempts to cancel the transmission of a specified
bundle rather than destroy the specified bundle.
- Note that it is not always possible to cancel the transmission of a
bundle for which multiple internal copies exist due to being transmitted
at different times or to different nodes.
- SourceForge Bug #56: ION now builds properly under OSX 10.9.5.
- SourceForge Bug #57: ION now has PARTIAL support for FreeBSD.
- ION now builds properly under FreeBSD 10.
- IMPORTANT NOTE: Several key ION applications have not yet been updated
to run properly in a FreeBSD environment. These
applications will be updated in a later ION release.
These updates may also become available in the short
term in the form of an official ION patch.
- SourceForge Bug #59: Fixed bug in the "dtpcadmin" application where it failed
to accept a valid parameter of zero in the "maxRtx", "aggrSizeLimit", and
- SourceForge Feature Request #18: The "cgrfetch" application now has an option
to list all valid outducts. This should simplify usage by making it
easier to identify an outduct to run the application against.
- SourceForge Feature Request #20: ION has been updated to better support the
CFS environment. CFS can now leverage many standalone ION executables via
an alternative API where the application's "main()" is replaced with a
- SourceForge Feature Request #21: ION now allows users to adjust the maximum
block size that LTP will receive directly into the SDR heap rather than a
temporary file. This allows users to ensure that a bundle's receive-
generate-forward chain can be handled entirely in memory. This often
improves efficiency by alleviating the need to write to a disk medium.
- SourceForge Feature Request #22: ION now has an option to support handling
database reversibility mechanisms in memory rather than files.
- SourceForge Feature Request #23: As a performance optimization, ION now has
better documented support for using pointer de-references rather than
memcpy() when executing read-only database operations.
- SourceForge Feature Request #24: ION’s mechanisms to prevent resource leaks
when ION is killed and restarted rather than shut down cleanly have been
modified to support the CFS environment. Note that this problem occurs
most commonly when transaction reversibility is disabled because task
termination locks the datastore until all tasks are killed. If utilizing
a file on disk for transaction reversibility would be too slow, consider
utilizing the new functionality to support database reversibility
mechanisms in memory (SourceForge Feature Request #22) rather than
disabling transaction reversibility entirely.
- SourceForge Feature Request #26: The CFDP implementation has been updated to
conform to the proposed CFDP V1 specification. Further updates will be
required when the specification revisions are completed and approved by
The interface changes are as follows:
- The function prototypes for the CFDP functions cfdp_put() and
cfdp_preview() have changed to accommodate proposed updates to the CFDP
specification. File offsets and lengths in all CFDP function calls are
now of type uvast (rather than unsigned int), because CFDP can now be
used to send files larger than 4 GB.
See the cfdp(3) man page for details.
- The cfdptest test program has been updated to enable specification of
closure latency and segment metadata.
See the cfdptest(1) man page for details.
- SourceForge Feature Request #27: ION now provides support for the DTN
Metadata Extension Block as specified in RFC 6258.
- SourceForge Feature Request #29: The ION test suite has been revamped to
dynamically detect when ION applications are initialized rather than wait
preset amounts of time for them to initialize. This provides faster
execution of the test suite when applications initialize faster than these
preset times and more reliable execution of the test suite when
applications initialize slower than the preset times.
- The "DTNperf" application now builds properly under sparc architectures.
DTNperf is an external utility that is included with ION in "/contrib".
- Several compilation issues with the "icinm.h" header file implementation have
- Improvements have been made to the TCPCLO.
- The receiveBundles() thread no longer terminates prematurely under
some circumstances when a connection is broken.
- The sending rate is no longer artifically capped at 1 bundle/sec.
- The "ionscript" application has been updated to support dtpcadmin
- ION's collection of man pages was previously included in "ION.pdf" but is now
available as a separate document, "ION-manpages.pdf".
= NOTES ON RELEASE 3.2.1 =
- Feature Request #8: Improvements have been made in how ION infers the node
number of the sending node.
ION now implements the Previous Hop Insertion Block (here called
Previous Hop Node, phn) extension block, which contains the identifying
singleton endpoint of the sending node. Previously, ION utilized
mechanisms for inferring the node number from convergence-layer EIDs,
which could generate false information, especially when multiple nodes
were resident on the same machine.
- Feature Request #14: The stream of "watch" characters that ION generates when
significant bundle events occur can now be redirected in a manner
similar to the way log messages may be redirected.
- Feature Request #15: Per specification, ION's LTP implementation now supports
LTP Authentication as described in RFC 5327.
- Feature Request #16: In preparation for the deployment of delay-tolerant
security key administration (DTKA), ION now includes several new features
dealing with public/private key management in the ION security database.
DTKA itself has been prototyped but is still pending approval for open
- Feature Request #17: A significant overhaul of the Bundle Streaming Service
(BSS) has been implemented to resolve a fundamental incompatibility with
implementing BSS with multicast. The new BSS forwarding implementation
(BSSP) resides at the convergence layer directly under BP so BSS channel
acknowledgments can be disambiguated. Previously, the BSS forwarder
design relied on BP custody transfer to control BSS data forwarding over
reliable and unreliable channels, which was incompatible with multicast
because custody transfer can't distinguish among the multiple identical
copies of a bundle that are forwarded at a multicast branch point.
- Bug #21: The interface for the internal smlist "deletion" callback has been
modified to be more consistent with the interfaces for the "lyst" and
"sdrlist" modules. The API now accepts the address of the element to
delete rather than its content.
- Bug #24: Fixed an error in the implementation of previously-released bugfix
where source or destination CFDP entity IDs could become malformed when
their entityNbrLengths differ.
- Bug #30: Applied various updates to LTP notices to be more compliant with the
RFC 5326 specification.
- LtpExportSessionStart notice is now delivered properly.
- Reception claims in on-the-wire segments now have offsets that are
relative to the report segment lower bound rather than relative to the
start of the block.
- Bug #33: LTP Green segment traffic is no longer terminated prematurely when a
partly-red partly-green block is sent.
- As a Receiver:
Previously, closure of an import session (on reception of report-ACK)
could incorrectly suppress the processing of subsequently received
Green segments for the same session.
- As a Sender:
Previously, processing of an "all-received" Report segment could
incorrectly closes the export session, which should not occur until
the EOB has also been sent.
- Bug #34: The Service Data Aggregation (SDA) in LTP has been updated to be
compliant with the latest specifications. The SDA now properly passes
the client ID to the client data unit length determination callback.
- Bug #36: Fixed specific compilation problems with dtnperf under the
Scientific Linux 5.5 (gcc 4.1.2) operating system.
- Bug #39: Per specification, ION's LTP implementation now rejects LTP
segments that do not contain the proper version number identifier (0b0000).
Previously, ION would process segments regardless of version number.
- Bug #40: Per specification, ION's LTP implementation now rejects LTP blocks
with a session number of 0, as the specifications requires session numbers
chosen by LTP senders to be in the range [1, 2^32-1].
Previously, ION would process such blocks with a cancel segment code 3.
- Bug #41: Added checks in the AMS TCP connection pool implementation to help
detect and guard against data corruption.
- Bug #42: Improvements have been made to the rate control implementation of BP
to better handle cases where the available residual capacity on the
channel to a neighboring node is overstated.
- Bug #43: Per specification, ION's LTP implementation now marks bundles as
"malformed" when there are gaps in the sequence of green data segments.
Previously, ION inserted fill data to saturate the gaps, which could
result in the delivery of a damaged bundle.
- Bug #44: Various man pages have been updated to be more compliant with the
man page specification.
- Bug #45: Added/updated man pages for various parts of the AMS subsystem.
- Bug #46: Fixed bug in ionscript where a bss/ipn mutual exclusion error was
presented when creating a monolithic configuration file and not specifying
existing bss and ipn configuration files as input.
Ionscript now properly outputs a monolithic configuration file that
contains neither a BSS nor an IPN subsection.
- Bug #48: Fixed a contact graph routing bug when recomputing routes wherein
ION could exclude the potentially-optimal route from consideration if it
is the initial contact on any remaining route.
Due to the recent inclusion of CGR Payload Classes, it is no longer
correct to exclude such routes from consideration.
- Patch #5: The Delay Tolerant Network Management Protocol (DTNMP) reference
implementation has been updated to the version that was used for testing
and demonstration earlier in the year.
- ION no longer requires libexpat by default in order to build.
Expat is still required in order to use XML configuration files for AMS.
To build against libexpat, use "./configure --with-expat".
= NOTES ON RELEASE 3.2.0 =
- Issue #364: Added support for Delay Tolerant Payload Conditioning (DTPC).
- DTPC adds (optional) end-to-end functionality similar to terrestrial
transport-layer protocols on top of the Bundle Protocol.
- DTPC offers the following additional enhancements:
- Application data record aggregation into large ADUs.
This reduces the BP overhead by preventing the proliferation of large
numbers of small bundles.
- Elision of redundant application data records.
This optimizes the utilization of low-capacity communication links.
- Feature Request #5: Several bugfixes and performance enhancements have been
applied to the DCCP convergence layer.
- Proper handling for the SIGPIPE signal.
- Usage of keepalives (rather than terminating idle connections) and
improved retry capability with an exponential backoff.
- CCID and Transmission Queue Length are now configurable within ION.
- Support added for the 0.0.0.0 (any) IP address.
- Various other refinements to standardize the DCCP CL with the other
ION convergence layers.
- Feature Request #9: Added support for the DTN Network Monitoring reference
implementation (DTNMP). DTNMP is an API added to ION that is used to produce
and monitor BP, LTP, and ICI instrumentation data.
- Feature Request #11: ION now provides the TTL of each received bundle in order
to accomodate a CCSDS Blue Book service requirement.
- Feature Request #12: Added support for DTNperf.
DTNperf is a utility provided in ION's "contrib" directory that can be used
to invoke performance testing between BP nodes.
- Bug #22: Improved support for the Extended Class Of Service block (ECOS).
ION now uses the "best effort" / "streaming" flag in ECOS to decide between
UDP and TCP transmission.
- Bug #24: Fixed a bug in CFDP where the destination entity ID could become
malformed when the length of the compressed destination entity ID was smaller
than the length of the compressed source entity ID.
- Bug #25: Updated ION to be conformant with several new build warnings
introduced in GCC 4.8.
- Bug #26: Increased the default stack size for the tcpcli and tcpclo processes
to prevent crashes under RTEMS and VxWorks.
- Bug #27: Fixed a memory leak that could arise when sending anonymous bundles
(bundles with a source EID of "dtn:none") while BSP was enabled.
- Bug #28: Fixed bug where reforwarded bundles were sometimes not being
properly purged from the forwarding queue.
- Bug #29: Fixed bug where the ltp_get_notice() operation could return a bad
value in its "data" value if the operation was interrupted.
ltp_get_notice() now properly sets the "data" to zero if interrupted.
- Bug #29: Errors in production of notices in LTP have been corrected.
- An option to limit the length of checkpoint and report serial numbers in LTP
has been added. The default limit is 2 bytes.
- Added generalized service data aggregation to LTP.
- Added controls to help understand and debug CGR routing decisions.
- The CGR routing engine can now dynamically log diagnostic trace messages
by enabling its "trace" flag.
- A new "cgrfetch" utility can used to invoke the creation of JSON
input files that describe the CGR routes that were considered.
These JSON input files can be used in conjunction with the CGR Viewer
web application to produced PDF files that provides illustrated graphs
for all considered routes.
See /contrib/cgr-viewer/Readme.md for more information.
- Added man pages for the Asynchronous Message Service (AMS) subsystem.
= NOTES ON RELEASE 3.1.3 =
- Feature Request #6: LTP screening is now disabled (rather than enabled)
by default. This should eliminate one often mystifying source of apparent
- Bug #23: Updated build configuration to fix build problems due to problems
linking various pthread libraries when using bleeding-edge automake tools.
- Bug #20: Child process of fork() was unable to write to log file if
- Bug #19: Lifetime expiration of fragmentary bundles could cause a crash.
- Bug #18: A cosmetic fix -- an informative log message has been added to
explain an alarming message issued by the ACS system.
- Bug #17: Various "admin" utility program function were broken when the
new restart capability was added.
- Bug #16: Errors in the generation of LTP checkpoint serial numbers have
been fixed. In particular, no more duplicate checkpoint serial numbers.
= NOTES ON RELEASE 3.1.2 =
- Bug #13: Migrated admission control facilities into the ZCO subsystem so that
they can be used outside of the BP subsystem.
- Bug #14: Fixed bug where CFDP headers could be stripped by the ZCO subsystem.
- Bug #15: Fixed various bugs that could affect ION's stability.
- Fixed possible deadlock if the bpcp/bpcpd were terminated via a signal
while in the middle of an SDR transaction.
- Fixed bug in the outducts of several convergence layers and forwarder
daemons that could cause them to not shut down properly due to an
unintended interaction between the erasure of a taskVar semaphore with
their internal looping constructs.
- Feature Request #1: Implemented "payload classes" to enable more
sophisticated contact graph routing functionality.
Extended CGR to compute routes on a per-payload-class basis that respects
the maximum bundle size that can be sent along each route.
The current payload classes are as follows:
- Payloads up to 1024 bytes (1 KB)
- Payloads between 1024 bytes (1 KB) and 1048576 bytes (1 MB)
- Payloads between 1048576 bytes (1 MB) and 1073741824 bytes (1 GB)
- Payloads larger than 1073741824 bytes (1 GB)
- Feature Request #4: Updated SDNV decoder and corresponding APIs to support
up to 64-bit SDNV's on 32-bit systems, allowing for a wider space of possible
- Added uClibc support for ION.
= NOTES ON RELEASE 3.1.1 =
- Bug #9: Fixed several bugs in the TCP convergence layer.
- TCPCLO would not reconnect to its neighbor if the neighbor was unreachable
Fixed by instituting a default keepalive (currently 15 seconds).
- Fixed a TCPCL interoperability bug when an external implementation uses
full-duplex TCP connections where the tcpclo would fail to receive bundles
from this implementation if the TCP connection had ever been previously
- Capped the maximum TCP reconnection timeout to 1 hour down from 24 hours.
- Bug #11: Fixed bug with transaction reversibility enabled where unpredictable
behavior could occur when a transaction reversal was forced and the state of
the SDR and working memory were out of sync.
ION now reinitializes working memory from the SDR to ensure data consistency.
- Bug #12: Fixed a bug in the red-black tree data structure used in LTP by which
sm_rbt_destroy() didn't release the tree's mutex to the OS which could
ultimately lead to consumption of all semaphores on the system and crash the
= NOTES ON RELEASE 3.1.0 =
- Began transitioning to the SourceForge issue tracker for code management.
SourceForge-originated issues are designated as "Bugs" or "Feature Requests".
- Bug #1: Fixed bug where the contact graph routing engine would prefer a
multi-hop route to the source over the "no-hop" loopback connection.
- Bug #2: Fixed bug in contact graph routing engine where erroneous routes
could be selected if route caching was enabled and any "downstream" contact on
a route had an end time earlier than the end time of the first contact on the
- Bug #3: Updated code and configurations to always use the dotted-string
representation of the sender's IP address rather than hostname. This was done
to mitigate problems that can arise due to aliasing and multihoming.
- Bug #7: Fixed bug where ionadmin would duplicate all currently-added contacts
and ranges that were added in the ION configuration files before starting
ION with the 's' command.
- Bug #8: Fixed bug where bundles that expired while in the limbo queue were not
- Bug #10: Updated the ionstart/ionscript/killm scripts with support for the
following ION administrative modules:
- Bundle streaming service (BSS)
- Interplanetary multicast (IMC)
- Aggregate custody signals (ACS)
- Feature Request #2: Added support for bundle age extension blocks to help
accomodate platforms that may not be able to provide a stable clock.
For more information on the bundle age extension, refer to internet draft
- Feature Request #3: Added support for bundle multicast.
- Issue #195: Finished replacement of pthreads-based semaphore "unwedge"
function with simpler platform-specific equivalents, begun in ION 2.4.0.
- Issue #306: Implemented several improvements to congestion forecasting.
- Improved the accuracy of the forecast of maximum storage occupancy
by incorporating estimations based on the rate of data being
transmitted in and out of the internal data heaps.
- ION now raises an alarm if expected peak volume of data is larger than
ION's allocated file storage size.
- Added new utility called "ionwarn" that is used for computing congestion
forecast at an ION node based on contact plan.
- Issue #311: Added a Bundle Streaming Service (BSS) regression test that
does not require the use of "xterm".
- Issue #339: Fixed bug in aggregate custody signals implementation that
prevented successful completion of regression tests on some platforms.
- Issue #349: Optimized the LTP engine to achieve faster data rates by by
substituting red-black trees and hash tables for linked lists where
= NOTES ON RELEASE 3.0.2 =
- Issue #280: Fixed a deadlock scenario when using "ionstart" to start two nodes
nodes in parallel.
- Issue #349: Applied some optimizations to the LTP engine to help it operate
at data rates that can exceed 80Mbps.
- Issue #357: Fixed compilation issues that prevented ION from building properly
on some kfreebsd systems.
- Issue #358: Fixed a bug in computing the CFDP inactivity deadline.
Updated the "cfdprc" man page to expose the parameters for configuring the
CFDP inactivity timeout interval.
- Issue #360: Updated the MinGW port of ION to supply definitions for various
required macros that are no longer supplied by newer versions of MinGW.
- Issue #361: Fixed compilation issues that prevented ION from building properly
on some debian-unstable systems.
- Issue #362: Fixed a bug where transplantation of man pages into ION.pdf could
fail if an obsolete version of man was used, causing compilation to fail. ION
now detects if the required "-l" option for man is supported, and does not
attempt to transplant the man pages if the option is not found.
- Issue #363: Fixed several memory leaks where SDR heap space was allocated but
= NOTES ON RELEASE 3.0.1 =
- *Issue #347: Included a test exercizing the fix for the TCPCL reconnection
bug that was made available in ion-open-source v3.0.0.
- Issue #348: Refreshed the MinGW and RTEMS ports of ION to build properly.
- Issue #352: BPCP, an rcp-like remote copy utility that transfers files via
CFDP, is a new utility now included with ION. It is built and installed by
default and has an interface similar to rcp, with support for local to
remote, remote to local, and remote to remote transfers in recursive and
- Issue #353: Scrubbed various test configurations in the test suite that
produced superfluous messages regarding the bundle security database not
being initialized properly.
- Issue #354: Slightly changed the behavior of "make retest", a directive that
reruns tests that failed on the previous test run.
Previously "make retest" would re-run the entire test suite if issued
immediately following a completely sucessful test run.
"make retest" now returns SUCCESS immediately if issued following a
completely successful test run, a behavior more amenable to automated
- Issue #355: Updated the ION build process to be compatible with the latest
versions of autotools, particularly automake v1.12.
- Issue #356: Enhanced the bptrace application with file-sending capabilities.
- ION has now been ported to the "bionic" libc implementation, the first
step toward porting ION to the Android operating system.
- Starting from this release the ION manual "ION.pdf" will be distributed with
an appendix containing up-to-date man pages for all ION applications.
= NOTES ON RELEASE 3.0.0 =
- Issue #242: Removed unnecessary recursion from the CGR implementation to help
protect against overflows from incorrect configurations.
- Issue #262: ION is now wired with a rudimentary instrumentation framework for
insight into run-time status, including bundle processing statistics and node
state metrics. This is in preparation for standardized network management.
- Issue #302: Implemented red-black trees as an alternative data structure to
linked lists for some performance-sensitive applications. Migrated the BP
timeline to use red-black trees.
- Issue #304: Optimized CGR route computation by developing a new algorithm that
employs Dijkstra's Algorithm.
- Issue #308: Several updates to ION's Payload Integrity Blocks (PIB) and
Payload Confidentiality Blocks (PCB):
- Bundle Security Protocol (BSP) utilities now support PIB and PCB.
- PIB and PCB extension block code has been added.
- Roughly 40 new test cases for PIB, PCB, and BAB combinations have been
- Issue #311: Bundle Streaming Service (BSS) support has been added to ION.
BSS passes "real-time" bundle payloads to an application callback while also
storing the bundle payloads to a database for user-directed playback.
- Issue #314: Standardized spelling of the word "semaphore" throughout the ION
- Issue #322: Improved reliability for custodial retransmissions when the next
custodian is a neighbor by making the following tweaks in libbpP.c:
- Changed the bpDequeue "stewardship accepted" flag to a custodial timeout
interval value (in seconds) that is computed by the CL output daemon,
based on CL-specific knowledge, in the event that the CL protocol is not
reliable and therefore can't accept stewardship of the bundle.
- Added the same custodial timeout interval value to bpHandleXmitSuccess, to
trigger reforwarding of the bundle even when stewardship has been taken
and CL transmission has been nominally successful and reliable, in the
event that the CL transmission ultimately (unexpectedly) does not succeed.
- Issue #325: Fixed a bug that could cause ION to crash when sending bundles for
which the destination endpoint is not a singleton.
- Issue #329: ION now supports sending (rather than just receiving) fragmented
bundles. (NOTE: this entailed several changes to the ZCO API.)
- Issue #339: Aggregate Custody Signals (ACS) have been added to ION.
- ACS is a technology that combines information from various separate
custody signals into a single bundle, which has the potential to save
"ack channel" bandwidth.
- For more information on ACS, see the following document:
- Issue #342: Changed several invocations of lyst_create() to
lyst_create_using(), to ensure that ION's private memory management is always
- Issue #343: Fixed bugs in LTP that could cause crashes at high data loss rates
- Fixed mechanisms for preventing resurrection of closed Import sessions.
- Fixed issue where the same report number could become assigned to two
different reports, resulting in link service daemons crashing.
- Issue #344: Added a "-t <ttl>" command line parameter to set the time-to-live
for bundles sent from the bpsource application. Previously bundles were
hard-coded with lifetimes of 300 seconds, which is now the default if the TTL
is not explicitly specified.
- Issue #345: The ION Deployment Guide is now bundled with ION. It provides
FAQ-style documentation for helping new users familiarize themselves with ION.
- Issue #347: Fixed bug in re-establishing connectivity via TCPCL when a node
shuts down and then restarts.
= NOTES ON RELEASE 2.5.3 =
- Issue #271: Various autotools changes to update how CFDP is built.
- Issue #288: Fixed bug in CFDP implementation where performing a proxy "puts"
operation without supplying a flow label would trigger an assertion failure.
- Issue #290: Fixed bug in CFDP implementation where an internal SDR list was
- Issue #316: Fixed several unresolved symbolic links in the "limbo" subsection
of the test suite.
- Issue #318: Fixed bug in CFDP implementation where an assertion was triggered
when a remote directory listing was performed for a directory that did not
- Issue #323: Fixed bug in BP implementation where an integer overflow in the
congestion forecasting code would cause BP to refuse bundles from local user
applications on 32-bit machines with long, busy contacts.
- Issue #328: Fixed bug in CFDP implementation where internal calculations for
its CFDP Directory Listing Response user messages were one character shorter
than they should be.
- Issue #330: Fixed bug in CFDP implementation where cfdpclock would remove
unsent FDUs that did not contain any actual file data.
- Issue #331: Fixed bug in CFDP implementation where user messages were not
restricted to a maximum of 255 characters in length, as per the CFDP
- Issue #333: Fixed bug in CFDP implementation where originating transaction ID
messages were not wrapped as CFDP user messages as per the CFDP specification,
resulting in messages that contained the wrong type codes.
- Issue #334: Fixed bug in CFDP implementation where the cfdp_put() and
cfdp_get() operations returned "0" as transactionId rather than the actual
CFDP transaction number.
- Issue #338: Modified test suite to use relative times instead of absolute
times wherever possible. This fixes several tests with configurations that
became obsolete after the start of 2012 and ensures better resilience of the
test suite to any kind of absolute time boundaries.
- Issue #340: Several minor updates have been applied to the DCCP implementation
to detect and build DCCP for linux kernels that meet or exceed version 3.2.0,
which puts several key DCCP fixes into the kernel baseline.
- Status reporting support has been added to cfdptest.
= NOTES ON RELEASE 2.5.2 =
- Issue #297: The ION design guide "ION.pdf" now dynamically incorporates the
This feature requires ghostscript, psutils, groff, and groff-base.
If not all are present, ION will build but ION.pdf will not have the latest
ION.pdf is built automatically via the "make" command.
To explicitly build the ION design guide document, use the following command:
- Issue #298+: Fixed build incompatibility between gcc v4.6.1 and later with
valgrind v3.6.1 and earlier. If needed to compile with Valgrind support,
ION will add -Wno-unused-but-set-variable to AM_CFLAGS.
Valgrind inclusion can also be explicitly controlled via the following flags:
./configure --enable-valgrind: Build with Valgrind support
./configure --disable-valgrind: Build without Valgrind support
- Issue #299: ION now prints a warning when given any BAB rule that is not for a
wild-carded EID signifying "all endpoints at the indicated node".
- Issue #300: Fixed several bugs in ipnfw:
- lookupRule() function of libipnfw.c incorrectly used srcServiceNbr
instead of srcNodeNbr.
- Several IPN function calls in ipnadmin.c have been wrapped in
sdr_begin_xn/sdr_exit_xn blocks to protect against assertion failures.
- Before putting a bundle into the Limbo list, ipnfw now searches for
blocked outducts and discards the bundle if none are found.
- Issue #301: Fixed issue where Ctl+C no longer terminated the bpsink and
- Issue #303: Fixed issue where new all-green transmission sessions could be
inhibited by the LTP limit on the total number of export sessions.
Since LTP green is unreliable, LTP green sessions don't need to occupy
resources at the sender for retransmissions, so the sessions need not be
- Issue #307: Fixed overflow bugs in the increaseScalar() and reduceScalar()
Added Scalar to SDNV conversion functions.
- Issue #313: Fixed issue with overlapping bundle source/destination memory
addresses that could cause bundle corruption on 64-bit systems.
- Issue #319: Fixed issue with AMS where the parseSocketSpec() function could
return INADDR_ANY, which isn't an acceptable IP address within AMS.
Now possible to enable AMS debug output via the following configure flag:
./configure --enable-ams-debug: Build with AMS debugging output
- Issue #324: Fixed issue where LTP could accumulate block acquisision files
after the block acquisition had already been completed. This was generally
due to unnecessary retransmitted segments that arrived late. Since the
blocks had already been delivered, the ensuing files were never destroyed.
= NOTES ON RELEASE 2.5.1 =
- Issue #185: ION now supports binding to INADDR_ANY in UDP/TCP ports and link
- Issue #298: Code scrub to remove unused variable warnings that prevent
compilation of ION under the default settings of gcc 4.6.1.
- Issue #310: Fixed broken Windows support. Fixed several minor issues.
= NOTES ON RELEASE 2.5.0 =
- Issue #189/#250/#252: ION shutdown utility added.
- Issue #196: The congestion checking subroutines have been implemented more
- Issue #265: The "bpdriver" application now allows users to set the TTL value
dynamically via a the "t<ttl>" command line parameter.
- Issue #276: Loopback range can now be set to a non-zero value.
- Issue #279: Fixed issue where calling bpMemo twice created timeline events
that could not be removed.
- Issue #286: Fixed issue where erroneous input to several administrative
applications could cause them to crash.
- Issue #292: Fixed issue where pid-checking routines can give false-negatives
for vxworks processes.
- Issue #296: Corrected usage of internal _xxxConstants() functions to ensure
they are only used with invariant values.
= NOTES ON RELEASE 2.4.2 =
- Issue #264: Removed checks for maximum block size in LTP, simplifying LTP
configuration and fixing a bug.
Related to the fix for issue #293, upgrading the LTP configuration worksheet.
- Issue #269: Clean up platform (portability) files, making it easier to add
Removed support for some obsolete platforms (e.g., HP-UX).
- Issue #270: Fixed issue in cfdptest that prevented the "Custody Requested"
switch from being set.
- Issue #275: ION now has support for code coverage analysis via lcov/gcov.
To enable this feature, use "./configure --with-gcov".
Building with code coverage support enables the following new directives:
make cov: creates a "coverage" subfolder from the top of the ION
directory where HTML coverage results are stored
make cov clean: removes the trace files and the "coverage" subdirectory
- Issue #281: Fixed issue that terminated bputa when it was directed
to write to a file without sufficient write permissions.
- Issue #282: Fixed issue where LTP segments received outside of a contact
- Issue #283: Fixed issue where the CFDP FDU didn't load the database before
using it, resulting in erroneous data being fed into the CFDP event queue.
- Issue #284: Fixed issue where CFDP mishandled extent merges, resulting
in checksum failures.
- Issue #285: Fixed issue in cfdpadmin where malformed commands could cause the
application to crash.
- Issue #287: Fixed issue that prevented the reporting of user messages and
filestore responses in cfdptest.
- Issue #293: Fixed issue in the ION LTP Worksheet where the spreadsheet
doesn't account for a small aggregation size limit when calculating
- Issue #295: ION's internal contact graph routing routines have been
parameterized to enable better support for deployment-specific variations
of the algorithm.
- ION now has native Windows support via MingW.
Support for Cygwin and Interix has been removed.
- Added support for inactivity timer in CFDP.
- Fixed race conditions in support for multithreaded AMS.
- Fixed memory leaks in AMS shutdown.
- Added ability to update AMS modules' management information bases while the
modules are running, by using the new amsmib utility. Modified amsstop to
use a similar mechanism.
- Added AMS Programmer's Guide to distribution.
- Various minor bug fixes.
= NOTES ON RELEASE 2.4.1 =
- *Issue #240: Added DCCP link service adapters to ION for the purpose of
providing congestion control without reliability guarantees, which is
beneficial for LTP deployments over IP networks, particularly when traversing
the Internet. The sender program is called "dccplso" and the receiver program
is called "dccplsi".
- *Issue #241: Added DCCP convergence layer for BP. The sender program is called
"dccpclo" and the receiver program is called "dccpcli".
- Issue #245: Added support for using the character "*" as a wildcard to remove
multiple contacts and ranges at once.
- Issue #257: Fixed issue where bundles would remain in the limbo queue after
an outduct was blocked rather than be reforwarded.
- Issue #263: Fixed issue with pthread_t. pthread_t is now treated as an
opaque type for the purpose of improving code correctness and portability.
- Issue #273: Added a ".hgignore" file that can be populated with regular
expressions of files to suppress when the "hg status" command is run.
- Issue #277: Fixed 3-node-stcp-ltp configuration to remove an unintentional
connection between nodes 1 and 3.
- Issue #278: Updated various test configuration files to have more recent
- Tests have been scrubbed to adopt the new security syntax enhancements
introduced in Issue #247.
* Note: Due to an immature DCCP implementation in most native OS kernels at the
time of release, formal DCCP testing on 64-bit systems has yet to be
conducted. Currently an experimental kernel containing several DCCP
fixes must be built to achieve acceptable performance. These fixes are
expected to become standard in the native linux 3.1 kernel.
= NOTES ON RELEASE 2.4.0 =
- Issue 105: Add correlation blocks to the bundle protocol block extension
- Issue 106: Extract bundle block-related functionality into separate source .c
and .h files to allow for future modular development of block extensions.
- Issue 161: Corrected some redundant and/or circular library linking when
- Issue 176: Upgrade ltp-cla to better conform to current ltpcla draft in the
DTNRG. Particularly the new "green" service handling.
- Issue 195: sm_SemUnwedge() in platform_sm.c uses a pthread to ensure a
semaphore is not already taken. Some platforms do not include pthreads and
the function can be implemented using semaphore trywait semantics().
- Issue 233: Some additional LTP debugging hooks added.
- Issue 238: Fixed possible leak of custodianEid in sendCtSignal.
- Issue 247: Updating the syntax of ionsecadmin for flexibility and readability.
- Issue 248: Fixed a timeline ordering bug in LTP.
- Issue 249: Added support to ION's LTP for section 6.21 of RFC 5326, the LTP
specification. Specifically detecting "red" and "green" segments that
overlap: an error-state.
- Issue 253: Fixed a tcpcl bug: When connection is lost to a node, a keepalive
needs to be at the end of the backoff period. TCPCL waits backoff period +
keepalive period to send the keepalive.
- Issue 254: Fixed LTP report serial number bug.
- Issue 255: Fixed bug where pseudoshell can cause duplicate parent processes.
- Issue 256: Fixed uninitialized memory read in reverseEnqueue().
- Issue 258: ZCO referenced file progress.
- Issue 260: Teach memcheck about MTAKE/MRELEASE for improved testing using
- Various bugfixes and features for AMS package.
- Various bugfixes and features for CFDP package.
= NOTES ON RELEASE 2.3.0 =
- Modified administrative startup commands to block until startup is complete,
rather than return immediately even if the node hasn't been fully initialized.
- Fixed a bug which truncated dtn-scheme bundle source EIDs.
- Modified some tests (1000.loopback) to run compiled objects instead of shell
scripts. This eliminates the need for shell scripting and allows automated
tests to function on platforms without shell access.
- Combined similar test configurations to use the shared /configs directory.
This will provide a standard set of updated configurations.
- Test suite has been modified to support multiple test sets. Creating a
text file in the tests directory containing a list of tests is all that
is needed to create a test set.
Examples: make test-all ; make test-branch ; make test-<anything>
- Added "limbo" queue to support suspension and resumption. This allows the
node to handle unexpected convergence layer failure as opposed to scheduled
or static contact termination.
- Code scrub of DGR.
- Added bping, bpchat, and bpstats2 utilities.
- Custody transfer is now optional in both bptrace and bpsend.
- Added feature for "convergence-layer stewardship"; CL's can initiate
reforwarding of bundles on transmission failure without explicit
- Enhanced LTP's udplso with a transmission rate limiter.
- Added new AOS CLA for LTP.
- Bug fixes to: LTP, CGR, SDR mutex, bpcounter, ionscript, tcpcl, stcp,
PSM mutex, SDR, bpsink, and others.
= NOTES ON RELEASE 2.2.1 =
- Corrected bug in LTP's data acquisition into file-system storage. Didn't
handle data loss and retransmission properly.
- Fixed bugs in LTP session cancellation that caused slow storage leaks.
- Upgraded the LTP configuration spreadsheet and its documentation, to
provide better guidance when most data are sent from or acquired into
file system storage.
- Updated the Design and Operations Guide to document new features and
- Various other bug fixes and tweaks.
= NOTES ON RELEASE 2.2.0 =
- Store bundles in ZCO.
- Added feature to store bundles directly to file-system memory, allowing
much larger bundles to be handled by the node.
- Added feature to allow all stdout output to be redirected to log files.
Feature is enabled by #defining FSWLOGGER.
- Code scrub BP, CFDP, ICI, LTP.
- Add support for asymmetric link-delay (range) in contacts.
- Add option to configure LTP spans for "purge" behavior on contact termination.
- Fixed handling of dtn:none eids.
- Optimize contact graph routing.
- Various bug fixes and tweaks.
= NOTES ON RELEASE 2.1.0 =
- Port to FreeBSD and RTEMS (via manual makefiles).
- Various fixes and tweaks.
- Added comprehensive automated testing suite.
- Fixed various compiler bugs
- Modified custodian EID generated from dtn://hostname to dtn://hostname.dtn
- Modified the loopback and ion-dtn2 configuration files for the new command
- Added BSP implementation using "stub" versions of hmac and sha1 for public
- Added CFDP implementation.
- Bug fixes in LTP, BRS, and some BP applications.
- Tweaks related to running on VxWorks.
- Added assertions.
- Bug fixes in the TCP convergence layer, particularly in the interest of
interoperability with dtn2.
= NOTES ON RELEASE 2.0.0 =
- Based on JPL revision 255:6443ed8258e1
- Converted underlying version control system to Mercurial from Subversion.
- Add ionsecadmin for managing the security policy database.
- Added better support for cross-scheme routing.
- Add support for the previous-hop-node extension.
- Update route computation to current CBHE draft standard.
- Addresses memory leak problem identified by U. of Colorado in long-duration
- LTP heavily modified to become more flexible and powerful.
- dtnadmin and associated utilities renamed to dtn2admin.
- Configuration file syntax changes slightly in ionadmin, bpadmin, ipnadmin,
dtn2admin; heavily changes syntax of ltpadmin. Included ION-LTP-Configuration
document and spreadsheet to explain new syntax and calculate values.
- Bug fixes.
- Documentation updates.
- Various testing applications in earlier releases are split from the ion
= NOTES ON RELEASE 1.1.0 =
- Based on JPL revision 226.
- Experimental new tcp convergence layer compatible with the standard defined
by draft-irtf-dtnrg-tcp-clayer-02. This convergence layer is titled tcp,
with other programs tcpcli tcpclo, and is suitable for connectivity with the
DTN2 reference implementation. Currently only unidirectional, unacknowledged
communication is supported. Some bugs still present.
- ION-specific tcp-based convergence layer is renamed stcp (stcpcli stcpclo)
and still functions as expected.
- Adds user-contributed applications bping bping bpmon bpalive.
- some LTP related bugs are not yet squashed.
- Updates to various user-contrib programs; added a bpmon_query program to work
- Revise LTP to use randomly selected session numbers rather than recycling
small session numbers - prevent data loss and corruption due to application of
late-arriving segments to sessions that are re-using the session numbers of
- added the bplive program.
- Updated for sbp_api.h and abp_api.c
- brought over basic working draft-tcpcl standards-compliant code with help of
patch submitted by Andrew.Jenkins@colorado.edu
- manually applied patches from firstname.lastname@example.org, adding sanity-checks and more
consistent comment-line detection to the admin programs
- Add fixes to eliminate compiler warnings, per Ohio U. Remove all ppc-vxworks
makefile directories, replacing them with arch-vxworks5 directories because
the VxWorks build varies with VxWorks version number and not with the hardware
platform that you build for. Add "expat", which is needed by AMS and is not
provided with VxWorks. Fix segfault bug in dtnfw reported by U. of Colorado.
Fix bug in support for trackingElts list.
- applied the patch from Andrew.Jenkins@colorado.edu about dtnfw's rule/plan but
- added new ION.pdf to the in-development release
- overhauled ionstart, ionscript, ionstart.awk to account for the dtnadmin need
for a node name as well as the bpadmin/dtnadmin/ipnadmin startup order bug
found by Andrew.Jenkins@colorado.edu
- Revise routing to match applicable backlog (based on bundle's priority; not
necessarily total backlog) against aggregate capacity when determining route
viability. (Per JIRA item DINET-107) Add implementation of extension block
for extended class of service, which includes an additional 256 "ordinal"
priority sub-levels within priority 2.
- Upgrade AMS implementation to Red Book 2.
- Add interface for inserting BP extensions.
= NOTES ON RELEASE 1.0_r203 =
- Based on jpl r203.
- Adds LTP package.
- Supports contact graph routing.
- Compilation changed to autoconf and automake; compilation tested on:
Ubuntu 7.04, 7.10, 8.04, Gentoo, Fedora 3, Fedora 7, OSX 10.5, and Solaris 10.
- Killm updated to work on OSX 10.4, due to an ipcs incompatibility; also
updated to make sure all processes are killed.
- Removed multiple compiler warnings.
- Includes bundle relay programs brsscla and brsccla; brsscla acts as the
server, brsccla acts as the client.
- Zco package rolled into ici.
- Ionscript added for configuration file management; ionstart and ionstop
- Various bug fixes.
- 2008-11-11 Added the ION Design and Operation manual v1.6.
= NOTES ON RELEASE 0.3 =
- Based on jpl r105.
- Simplified and cleaned up SDR implementation in the ici package.
- ion package and utilities renamed to "bp" for "bundle protocol."