CCNx Explore the next step in networking
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network develop network development network protocol network architecture CCNx

CCNx Description

Explore the next step in networking CCNx (Content Centric Networking) is an open source project exploring the next step in networking, based on one fundamental architectural change: replacing named hosts with named content as the primary abstraction. CCNx was launched with ideas from PARC's Content-Centric Networking (CCN) research program. The PARC CCN architecture takes content as a primitive and decouples location from identity, security, and access, with no concept of host/machine at the lowest level.Only Unix-like platforms are currently supported. CCNx code is tested on Mac OS X, Ubuntu Linux, Solaris, and FreeBSD. What's New in This Release: · NOTE: 0.2.0 introduces some changes to the core CCNx protocol, most notably a change in the definition of ephemeral digests. · The implicit digest component used as the last component in the name of a ContentObject, used in Links and Exclude filters, now use the digest of the entire encoded ContentObject, rather than merely the digest of the CO's content field. This allows exclusion of inadvertent or malicious traffic with the same name and content but different signing information from the intended traffic. Described in doc/technical/DigestComponent.txt · Removed dependency on javax.xml.streams. Replaced with stream-based XML Pull parser as implemented in the kXML library (). This removes the JDK 1.5-specific requirement for JSR 173 jars; JDK 1.5 users can delete jsr173.jar and jsr173_ri.jar from their lib directories. · Repositories now have their own key pairs, rather than using the user's default key. This will enable policy-related communication with the repo and more sophisticated, multi-repository name enumeration protocols. · Implementation of the registration protocol, which allows clients to register with ccnd the prefixes for Interests they wish to recieve, is well under way (see issues #100071, #100072, #100073). Until this code is stable, we will retain the default Interest flooding behavior. · Initial version of Java-based registration control client, ccndcontrol, analogous to ccndc. · Added new ccnFileProxy application, and start script bin/ccnfileproxy; this proxies a specified portion of local file space to CCNx. Note that the proxy currently does not respect access controls, and will make all files it can read available. · Logging cleanups and improvements throughout. · Bump CCN_API_VERSION to 2000. · Make a more palatable C API for signing content objects; see ccn_sign_content(...). · Fix -v handling for ccnputfile. · Remove troublesome uses of $$ in csrc/tests/test_* (Bug #100076) · Fix ccn_initkeystore.sh to not rely on $USER. Use the id command instead. · Start to make configuration settings more robust to platform variations; improved options for controlling KEYSTORE_DIRECTORY, CCN_DIR and username. · Fix ccnd to verify the signatures in face management and registration requests. · Added a C library mechanism for obtaining ccndid, needed by self-registration. · Allow ccndsmoketest to send zero-length datagrams if so instructed. · Remove unused ccn_signed_info_create_default() from API. Add vlc parameters to control: · ccn-fifo-maxblocks -- the maximum number of blocks held in the FIFO · ccn-fifo-blocksize -- the size of blocks queued in the FIFO · Improved vlc plugin to use data prefetching, and attempt reconnection when disconnected from ccnd. · Make the XML jar file a property so it can be overriden on the command line if using different library. · Cleanup, bug fixes and additional tests for access control code. · Many small bugfixes to address issues with tests. Issues Resolved: · Feature #100010 Change implicit digest component · Bug #100012 java ContentObject code calculates digest on content only · Bug #100020 repo policy files should be able to span multiple ContentObjects · Bug #100022 hashtb.c needs the delayed finalization case to be implemented. Was included in 0.1.2. · Bug #100031 ccnd should check for AF_UNIX · Bug #100034 CCNWriter doesn't take preexisting Interests · Bug #100048 perror calls in ccnd should use ccnd_msg instead · Bug #100050 Refactor ccnd for improved flexibility in file locations and logging · Added CCN_LOCAL_SOCKNAME and CCND_KEYSTORE_DIRECTORY variables. · Feature #100050 Refactor ccnd for improved flexibility in file locations and logging · Feature #100053 remove dependency on javax.xml streams · Feature #100054 repository needs its own keys · Feature #100066 unsolicited content should not cause ccnd to toss good content · Feature #100067 Refactor ccnd keystore directory · Feature #100068 Implement destroyface in ccnd · Feature #100069 make ccndstart.sh less chatty · Feature #100071 Self-registration protocol in ccnd · Bug #100076 Use of $$ in csrc/tests/test-* considered harmful · Bug #100077 Please write some more code here (reduced debugging output) · Bug #100079 ccnputfile does not write any segments for zero-length files · Bug #100083 ccnd not listening to both ipv4 and ipv6 tcp addresses on Linux

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