1 Implementable right now (but not necessarily important), with caveats
2 (unavailable components that will limit what can be implemented right
3 away), in order in which they will likely be done:
9 * FRAGMENTATION [Ji Lu]
10 * HTTP transport [Matthias]
15 * MySQL / Postgres plugins (datastore, datacache)
19 - "Forcing disconnect of XXX due to inactivity" -- can happen every few MS!?
20 (disconnect does not really succeed, or what?)
21 Also, core does not seem to actually decrement the number of active
22 sessions even if no connections exist for a while! (likely related...)
23 - transport reports bw quota violations on slow systems (core or
24 transport issue? tracking issue or actual violation?)
26 - utilization can (easily, restart?) go out of control (very large), causing
27 content expiration job to go crazy and delete everything!
29 - on some systems, keyword search does not find locally published content
30 (need testcase of command-line tools! - also good to cover getopt API!)
31 [could be related to datastore issue above!]
32 - 2-peer download is still too slow (why?)
33 - advanced FS API parts
34 + support recursive download even if filename is NULL and we hence
35 do not generate files on disk (use temp_filename)
36 + bound parallelism (# fs downloads)
37 + distinguish in performance tracking and event signalling between
38 downloads that are actually running and those that are merely in the queue
39 + gnunet-service-fs (hot-path routing, load-based routing, nitpicks)
40 - [gnunet-service-fs.c:208]: member 'LocalGetContext::results_bf_size' is never used
41 - [gnunet-service-fs.c:501]: member 'PendingRequest::used_pids_size' is never used
42 - [gnunet-service-fs.c:654]: member 'ConnectedPeer::last_client_replies' is never used
43 - [gnunet-service-fs.c:669]: member 'ConnectedPeer::avg_delay' is never used
44 - [gnunet-service-fs.c:675]: member 'ConnectedPeer::avg_priority' is never used
45 - [gnunet-service-fs.c:688]: member 'ConnectedPeer::pending_requests' is never used
46 - [gnunet-service-fs.c:694]: member 'ConnectedPeer::last_p2p_replies_woff' is never used
47 - [gnunet-service-fs.c:700]: member 'ConnectedPeer::last_client_replies_woff' is never used
54 - trust: need *fast* way to check/update trust in peers
55 (async peerinfo would not be right; certainly not with the
58 - scheduler should change OS process priority based on task priority;
59 should make better use of task priorities in general
60 - only connect() sockets that are ready (select()) [Nils]
61 [On W32, we need to select after calling socket before
64 - need function to test "equivalency" of HELLOs (or integrate with "merge"?); use in PEERINFO
66 - design & implement new setup tool
68 - good to have for transport/DV evaluation!
71 - implement DV service
72 - implement DV library
73 - implement DV transport plugin
75 - implement performance tests
77 - does not seem to work with timeouts (especially if service is not running)
79 - needs more testing (especially F2F topology)
80 - needs to re-try connecting after disconnect (currently, it
81 initially triggers a connection request, but if that connection
82 fails / goes down, it does not retry in a timely fashion;
83 cause seems to be the 'blacklist_after_attempt' being set to 1h,
84 which is rather long -- and should probably be adjusted based on
85 the number of connections / known peers)
86 - If the topology daemon crashes, peers that were put on the
87 blacklist with transport will never be removed from it (until
88 transport service dies); we should use the blacklist notification
89 API to learn about the exact set of blacklisted peers at all times
90 (FIXME: the transport_api implementation of blacklisting
91 also does not work nicely for this since it won't let us know about
92 disconnect-reconnect events and the implicit whitelisting
93 that might happen here; that's not so bad since we will
94 re-blacklist on pre-connect attempts anyway, so this is
95 a minor issue; OTOH, we might want to be more explicit about
96 allowing/forbidding connects on pre-connect to avoid
97 entering connect attempts to just be blacklisted shortly afterwards).
98 - the code uses the term 'blacklist' for both peers that are forbidden
99 to connect (i.e. F2F mode) as well as peers that we currently
100 won't try to actively connect to ourselves (since we just tried);
101 This is confusing. We need two distinct terms (greylist?).
102 - move code to use hash table instead of linked list
103 - instead of periodically discarding blacklisted entries,
104 simply add task that is triggered at the right time (earlier free,
106 - check if new HELLO learned is different from old HELLO
107 before resetting entire state!
109 - datastore reservation (publishing)
110 - search: availability probes
111 - persistence support (publish, unindex, search, download)
112 - active migration support (in fs or in datastore or new daemon?)
114 + active reply route caching design & implementation of service; gap extension!
116 - how to integrate scheduler with GTK event loop!?
120 - good to have for DV/DHT evaluation!
122 - implement DHT service (needs DV, DATACACHE)
123 - implement DHT library
124 - implement testcases
125 - implement performance tests
129 - need to get rid of synchronous API for service starts (cause all kinds of problems)
130 [=> eliminate for need to tell ARM about service starts most of the time!] [Safey]
131 - better tracking of which config changes actually need to cause process restarts by ARM.
132 - listen for requests to discover dependencies between services (and avoid
133 having to explicitly program start requests)
134 - better crash management (attach debugging support, capture and analyze
135 debug output, detect random vs. deterministic crashes)
138 - location URIs (publish, search, download)
139 - non-anonymous FS service (needs DHT)
140 + DHT integration for search
141 + CS-DHT-functions (DHT-put of LOC)
142 + P2P-functions (DHT-get)
143 - collection API & tests
144 + gnunet-pseudonym (collection support)
145 - implement FS performance tests
152 * Determine RC bugs and fix those!
154 - modify configuration to allow controlling connections for non-local starts
155 - testbed creation with topology (needs working F2F topology)
157 - implement testcases for distributed testing
158 - test basic peer re-configure
159 - test topology creation
160 - test churn generation
161 - consider changing API for peer-group termination to
162 call continuation when done
164 - finalize API design
167 - integration with transport service
168 * MYSQL database backends: [CG]
174 - expand bibliography
175 - convert documentation pages to books
176 - update books (especially for developers)
177 - create good Drupal theme for GNUnet
178 - make a NICE download page and figure out how to
179 enable developers to publish TGZs nicely
180 - port "contact" page
181 - add content type for "todo" items?
182 * POSTGRES database backends: [CG]
185 * Determine RC bugs and fix those!
189 - SMTP transport backend
190 - HTTPS transport backend
191 + improved HTTPS support in MHD
193 - Implement method of learning our external addresses from
194 other peers; need some kind of threshold-based
195 scheme, limiting both the total number of addresses that we accept
196 this way as well as requiring multiple confirmations; also, we
197 should possibly try to confirm that the given address works for
198 us ourselves (loopback-style) before adding it to the list
199 + we may be able to simplify WELCOME messages (no need to add
200 addresses there anymore, but may help to learn them there anyway...).
201 + we probably want some kind of voting/counting for learning IP addresses
202 (maybe including IP addresses in ads proportional to how often others
203 report them? we at least need some protection against >64k HELLOs!),
204 + provide a way to give the user a list of "learned" IP addresses and
205 a way to easily "veto" addresses off the list!
206 => If MiM attacker uses vetoed address, blacklist the specific IP for
207 the presumed neighbour!
208 - implement gnunet-transport (transport configurator / tester)
209 - UPnP-based IP detection
210 (Note: build library always, build service when libxml2/etc. are available)
212 - Remove KBlocks in gnunet-unindex (see discussion with Kenneth Almquist on gnunet-devs in 9/2009)
213 - Allow checking of presence of search results and/or content via command-line tools
214 (add options to gnunet-search / gnunet-download to limit search to local peer)
216 - expire 'ancient' HELLOs (those without valid addresses AND that
217 we have not 'used' (for their public keys) in a while; need a way
218 to track actual 'use')
219 - make sue we also trigger notifications whenever HELLOs expire
226 - should use hash map to look up sessions
228 - api creates many, many short-lived TCP connections; either some
229 clients should use the API differently or we need to change the
230 API to enable re-use of connections to the service
232 - should use BIO instead of mmap
234 - need to periodically probe latency/transport cost changes & possibly switch transport
235 - instantly filter addresses from *other* peers that
236 are *equal* to our own address + port (i.e., localhost:2086). We
237 no longer filter those for outgoing (helps with loopback testing
238 and keeps the code clean), but we should filter strictly *impossible*
239 incoming addresses! This is for efficiency, not correctness.
240 - should use hash map to look up Neighbours
242 - 'server' uses 'GNUNET_PEERINFO_iterate', should probably switch to notification API
243 (for more instant / up-to-date hostlists at lower cost) [OPTIMIZATION]
247 - repeatedly resolve hostname and look up interfaces to determine our own IP
248 - [./transport/plugin_transport_tcp.c:391]: (style) struct or union member 'Plugin::address_update_task' is never used (related to issue above)
250 - [./transport/gnunet-service-transport.c:173]: (style) struct or union member 'TransportPlugin::rebuild' is never used (related to TCP not refreshing external addresses?)
252 - add stats (# bytes available, # bytes used, # PUTs, # GETs, # GETs satisfied)
254 - support inline data in directories for recursive file downloads (fs_download)