X-Git-Url: http://git.silcnet.org/gitweb/?p=silc.git;a=blobdiff_plain;f=TODO;h=9ae2702568d95075169fb8a366e0b8448ea3fefe;hp=9ba10bf8824c352002cfba86e9dd3e100254026b;hb=2ce87b35c8d2512a67ba6d1159fd5ecafeb67b6f;hpb=de6c9a896a7acc055261dbf5351b6f4eff60b364 diff --git a/TODO b/TODO index 9ba10bf8..9ae27025 100644 --- a/TODO +++ b/TODO @@ -1,322 +1,557 @@ -TODO for 1.1 -============ +TODO for 1.2 And Beyond +======================= NOTE: Any item that doesn't have (***DONE) in it, isn't done yet. The (***TESTING NEEDED) means that the item has been done but not yet properly tested. +NOTE: A TODO entry does not mean that it is ever going to be done. Some +of the entries may be just ideas, good, bad or ugly. If you want to work +on some of the TODO entries simply let us know about it by dropping a note +to silc-devel mailing list or appear on 'silc' channel on SILCNet. -apps/silcd, The SILC Server ****PARTLY DONE**** -=========================== - o Port all code to use SILC Toolkit 1.1 APIs. +General +======= - o Fix/test GETKEY. + o Create apps/tutorial containing various Toolkit API tutorials. - o Fix/test MOTD. + o The Toolkit split. The Toolkit is to be splitted in parts. How many + parts and what the parts are isn't decided yet. Each part is a separate + software package. Current thinking is of the following: - o Remove protocol.[ch]. (***DONE) + SILC Toolkit SILC protocol, client and server library + SILC Runtime Toolkit runtime library + SILC Crypto Toolkit crypto, asn1, math, skr, pgp, etc. - o Rewrite connecting accepting. (***TESTING NEEDED) + The rationale for this is of course that other than SILC projects + might like to use the various libraries SILC Toolkit provides, but + naturally they don't want the bloat of SILC protocol related stuff. - o Rewrite async connecting. (***TESTING NEEDED) + The Runtime library in SILC Toolkit is a general purpose runtime library, + like Glib and APR are. The runtime library is to be developed further + to provide alternative to Glib and APR. - o Connecting from SILC router to SILC server. + The Crypto library in SILC Toolkit is a general purpose crypto library + providing pretty nice APIs compared to many other crypto libraries, + especially OpenSSL. The Crypto library is to be developed further + to include support for OpenPGP, X.509 and SSH2. - o Rewrite rehash, HUP. - o Heartbeat-keepalive. +lib/silccore +============ - o Test backup router resuming protocol. + o SILC_PACKET_FLAG_ACK support. Implement ACK packet and packet payload + to silcpacket.c. - o Check all packet receive routines that they call silc_packet_free. + o All payload encoding routines should take SilcStack as argument. - o Add Web statistics module using lib/silchttp. Give out server - statistics. (***DONE) + o Remove SilcCommandCb from silccommand.h. + o All payload test routines into lib/silccore/tests/. -SILC Client ****PARTLY DONE**** -=========== - o Porting to new Toolkit API and new Client Library API (***TESTING NEEDED) +lib/silcclient, The Client Library +================================== - o Improve help files, especially /cmode, /cumode and /key. + o UDP SILC connection support to SILC server + o Giving WHOIS for nick that doesn't exist should remove any same + named entries from the client cache. -lib/silcclient, The Client Library ***PARTLY DONE**** -================================== + o peer-to-peer private messages + + o Private message key request notification to application. See XXX in + client_prvmsg.c. - o silcclient.h clean up and API rewrites. + o in JOIN notify handle resolving that timedout. Currently the user is + never joined the channel if this happens. What to do if message is + received from user that hasn't been resolved/joined? - o silcclient_entry.h finishing, all entry relates APIs to this header. + o Add the SilcStream (socket stream) from the SilcPacketStream and + SilcSocket from the socket stream to SilcClientConnection for easier + access to them for programmers. Currently these have to be digged up + from the packet stream. - o SilcChannelEntry, SilcServerEntry, SilcChannelUser, allocating, - freeing, finding, etc. rewrite. Also making them reference counted for - multi threads use. (***DONE) + o Connection option that attemps to connect to remot host with various + different mechanisms: UDP 706, TCP 706, TCP 80, TCP 443, UDP 7706 and + TCP 7706. This is the so called hole punching mechanism. - o Rewrite silc_client_get_clients_by_channel. + o Message ACKing support. - o Rewrite client side WHOIS command (for whois -details). (***DONE) + o in /cmode and /cumode with +r, maybe the public key and private key + could be just some "string", which would then match to "string.pub" and + "string.prv". - o Finish all the missing SILC packet processings, rewrites. (***DONE) + o If the SILC Events (see below) are implemented, perhaps client library + should provide events so that application developer has a choice of + developing the SILC app with callbacks or with events. - o The client_notify.c rewrite. (***DONE) + o Ability to recover from rekey errors, at least try to. - o Resuming to client_register.c (remove client_resume.c) (***DONE) - o Rekey rewrite. (***DONE) +Runtime library, lib/silcutil/ +============================== - o Remove protocol.[ch]. (***DONE) + o silc_malloc et. al. to respect --with-alignment. - o File transfer rewrite. (***DONE) + o Fix universal time decoding (doesn't accept all formats) in silctime.c. - o File transfer API documentation. + o Additional scheduler changes: optimize silc_schedule_wakeup. Wakeup + only if the scheduler is actually waiting something. If it is + delivering tasks wakeup is not needed. - o Connection auth request. (***DONE) + o silc_stringprep to non-allocating version. - o Password auth test, public key auth test. + o Add builtin SOCKS and HTTP Proxy support, well the SOCKS at least. + SILC currently supports SOCKS4 and SOCKS5 but it needs to be compiled + in separately. - o Starting key exchange directly, rewrite. (***DONE) + o Add directory opening/traversing functions (***DONE, TODO Windows & Symbian) - o Channel messages, channel private keys, channel entires, channel - search, etc. rewrite. (***TESTING NEEDED) + o regex from /lib/contrib to lib/silcutil, define SILC Regex API. (***DONE) - o For many APIs leave the hash context allocations to the caller instead - of using client->sha1hash and client->md5hash, or some kind of thread - safe (no locking) concept. (***DONE) + o Add functions to manipulate environment variables. (***DONE) - o Key agreement rewrite. (***TESTING NEEDED) + o Add functions to loading shared/dynamic object symbols (replaces the + SIM library (lib/silcsim) and introduces generic library). Add this + to lib/silcutil/silcdll.[ch]. (***TESTING NEEDED WIN32, TODO Symbian) - o Connecting to remote client (***DONE) + o silc_getopt routines (***DONE) - o Private message waiting API (in threads) (***TESING NEEDED) + o The SILC Event signals. Asynchronous events that can be created, + connected to and signalled. Either own event routines or glued into + SilcSchedule. (***DONE) - o client_attrs.c, attributes rewrite. (***TESTING NEEDED) + o If the event signals are added, the SILC_PARAM_* stuff needs to be + moved from silcbuffmt.h to silctypes.h or something similar. (***DONE) - o No SilcBuffer lists back to application in command_reply operations. - Convert them all to real lists and/or structures for easier use. + o In case the SILC Events are done we shall create a new concept of + parent and child SilcSchedule's. When new SilcSchedule is created a + parent can be associated to it. This association could be done either + directly by the parent or by any other children. This way the signals + would in effect be global and would reach all children schedulers. + + This relationship would be associative only. The schedulers are still + independent and run independently from each other. All schedulers + would be linked and could be accessed from any of the schedulers. + It should be possible to retrieve the parent and enumerate all children + from any of the schedulers. (***DONE) - o Nickname formatting rewrite. (***TESTING NEEDED) + o Base64 to an own API (***DONE) - o UDP connections. (***TESTING NEEDED) + o Timer API (***DONE) + o silc_hash_table_replace -> silc_hash_table_set. Retain support for + silc_hash_table_replace as macro. (***DONE) -lib/silcsftp ****DONE**** -============ + o SilcStack aware SilcHashTable. (***DONE) - o Porting to use the new util library. (***DONE) + o SilcStack aware SilcDList. (***DONE) + o Thread pool API. Add this to lib/silcutil/silcthread.[ch]. (***DONE) -lib/silccore/silcpacket.[ch] ****PARTLY DONE**** -============================ + o Add new functions to SilcStack API in lib/silcutil/silcstack.[ch]. Add + silc_stack_[set|get]_alignment. It defines the default alignment used + when allocating memory from stack. It can be used to specify special + alignments too when needed (such as for hardware devices like crypto + accelerators). Move also the low level silc_stack_malloc and + silc_stack_realloc from silcstack_i.h to silcstack.h. Remove the + _ua unaligned memory allocation routines. Remove unaligned memory + allocation possibility. (***DONE) - o SilcPacketEngine. (***DONE) + o silc_stack_alloc shouldn't require multiple by 8 size argument, it + should figure it out itself. (***DONE) - o New SILC Packet API. (***DONE) + o Add '%@' format to silc_snprintf functions. + (***DONE) - o Implement silc_packet_engine_stop and silc_packet_stream_destroy. (***DONE) + o SILC Tls (Thread-local storage) API to lib/silcutil/silcthread.[ch]. + (***DONE) - o IV Included flag support, UDP transport support (***TESTING NEEDED) + o Change silc_gettimeofday on Unix to use clock_gettime with REALTIME + clock if it is available, otherwise use gettimeofday(). (***DONE) + o Generic SilcResult that includes all possible status and + error conditions and generic errno API. (***DONE) -lib/silccore/silcid.[ch] ****DONE**** -======================== + (o Structured log messages to Log API. Allows machine readable log + messages. Would allow sending of any kind of data in a log message.) maybe - o Add silc_id_str2id to accept the destination buffer as argument - and thus not require any memory allocation. Same will happen - with silc_id_payload_* functions. (***DONE) + (o Change some stream routines (like socket stream API) to accept ANY + stream and use silc_stream_get_root to get the socket stream from the + given stream. This will make various stream APIs more easier to use + when user doesn't have to dig up the correct stream. - o silc_id_str2id, silc_id2str to non-allocating routines. (***DONE) + Add silc_stream_get_root and add get_root stream operation. It + returns the root of the stream or NULL if stream doesn't have root.) maybe + (o Compression routines are missing. The protocol supports packet + compression thus it must be implemented. SILC Zip API must be + defined.) maybe -lib/silcskr ****PARTLY DONE**** -=========== + (o SilcIpAddr abstraction. Ipv4 and Ipv6 support to the abstaction.) + maybe - o Removing key from the repository is not possible currently. It should - be. (***DONE) + (o SILC specific socket creation/closing routines to silcnet.h, wrappers + to all send(), recv(), sendto() etc. Bad thing is that we'd have to + define all socket options, sockaddrs, etc.) maybe + (o Fast mutex implementation. Fast rwlock implementation. Mutex and + rwlock implementation using atomic operations.) not for now. -lib/silcske/silcske.[ch] ***PARTLY DONE**** -======================== + (o mmap) maybe - o Responder rekey (***TESTING NEEDED) - o IV Included flag support in SKE (***DONE) +lib/silcutil/symbian/ +===================== - o UDP transport changes; retransmission support by using exponential - backoff algorithm. (***DONE) + o Something needs to be thought to the logging globals as well, + like silc_debug etc. They won't work on EPOC. Perhaps logging + and debugging is to be disabled on EPOC. The logging currently works + by it cannot be controlled, same with debugging. - o SilcConnAuth header file documentation. (***DONE) +SFTP Library, lib/silcsftp/ +=========================== -lib/silccrypt ****PARTLY DONE**** -============= + o Read prefetch (read-ahead, reading ahead of time). Maybe if this can + be done easily. - o Implement PKCS #1 sign/verify with hash OID. (***TESTING NEEDED) - o Implement SILC Public Key Version 2 handling in sign/verify. Implement - Version (V) identifier (***DONE) +SKR Library, lib/silcskr/ +========================= - o SILC PKCS (silcpkcs.h) reorganizing when other PK supports added. - Move the SILC Public Key routines away from the crypto library into - the core library (silccore). silc_pkcs_public/private_key_* routines - to silc_public/private_key_* routines. The silc_public_key_* routines - should also automatically handle SILC Public Keys, and other keys - and certificates as well. Add fe. silcpk.h into silccore. It should - also include the Public Key Payload encoding and decoding routines. - (***DONE) + o Add fingerprint as search constraint. - o Assembler AES (***DONE) + o Add OpenPGP support. Adding, removing, fetching PGP keys. (Keyring + support?) + o Add support for importing public keys from a directory and/or from a + file. Add support for exporting the repository (different formats for + different key types?). -lib/silcutil ****PARTLY DONE**** -============ + o Change the entire silc_skr_find API. Remove SilcSKRFind and just simply + add the find constraints as variable argument list to silc_skr_find, eg: - o The regex code from lib/contrib might compile fine on all platforms. - No need to make it silcutil/unix/ specific. Add them to generic - silcutil.c. (***TESTNG NEEDED) + silc_skr_find(skr, schedule, callback, context, + SILC_SKR_FIND_PUBLIC_KEY, public_key, + SILC_SKR_FIND_COUNTRY, "FI", + SILC_SKR_FIND_USAGE, SILC_SKR_USAGE_AUTH, + SILC_SKR_FIND_END); - o Silc FD Stream to WIN32 (lib/silcutil/silcfdstream.h) (***TESTING NEEDED) + NULL argument would be ignored and skipped. - o bool -> SilcBool (***DONE) + o Add OR logical rule in addition of the current default AND, eg: + // Found key(s) MUST have this public key AND this country. + silc_skr_find(skr, schedule, callback, context, + SILC_SKR_FIND_RULE_AND, + SILC_SKR_FIND_PUBLIC_KEY, public_key, + SILC_SKR_FIND_COUNTRY, "FI", + SILC_SKR_FIND_END); -lib/silcutil/silcbuffer.h ****DONE**** -========================= + // Found key(s) MUST have this public key OR this key context + silc_skr_find(skr, schedule, callback, context, + SILC_SKR_FIND_RULE_OR, + SILC_SKR_FIND_PUBLIC_KEY, public_key, + SILC_SKR_FIND_CONTEXT, key_context, + SILC_SKR_FIND_END); - o Remove the `truelen' field from SilcBuffer as it is entirely - redundant since we can get the true length of the buffer by - doing buffer->end - buffer->header. Add silc_buffer_truelen - macro instead. Consider also removing `len' field too since - it effectively is buffer->tail - buffer->data, and adding - silc_buffer_len macro can do the same. These would save - totally 8 bytes of memory per buffer. (***DONE) + o SilcStack to SKR API. -lib/silcutil/silcbuffmt.[ch] ****DONE**** -============================ +Crypto Library, lib/silccrypt/ +============================== - o SilcStack aware silc_buffer_unformat (***DONE) + o Add silc_crypto_init and silc_crypto_uninit. The _init should take + SilcStack that will act as global memory pool for all of crypto + library. It should not be necessary anymore to separately register + default ciphers, HMACs, etc, the _init would do that. However, if + user after _init calls silc_pkcs_register, for example, it would take + preference over the default once, ie. user can always dictate the + order of algorithms. (***DONE) - o SilcStack aware silc_buffer_format (***DONE) + o Add fingerprint to SilcSILCPublicKey and retrieval to silcpk.h, and + possibly to silcpkcs.h. - o silc_buffer_format reallocates automatically (***DONE) + /* Return fingerprint of the `public_key'. Returns also the algorithm + that has been used to make the fingerprint. */ + const unsigned char * + silc_pkcs_get_fingerprint(SilcPublicKey public_key, + const char **hash_algorithm, + SilcUInt32 *fingerprint_len); - o SILC_STR_OFFSET (***DONE) + o Change SILC PKCS API to asynchronous, so that accelerators can be used. + All PKCS routines should now take callbacks as argument and they should + be delivered to SilcPKCSObject and SilcPKCSAlgorithm too. (***DONE) + o The asynchronous functions to perhaps to _async to preserve backwards + compatibility with synchronous versions, and make easier to migrate + from 1.1 to 1.2. -lib/silcutil/silcstack.[ch] ****DONE**** -=========================== + o Change PKCS Algorithm API to take SilcPKCSAlgorithm as argument to + encrypt, decrypt, sign and verify functions. We may need to for exmaple + check the alg->hash, supported hash functions. Maybe deliver it also + to all other functions in SilcPKCSAlgorithm to be consistent. (***DONE) - o Data stack implementation (***DONE) + o Add DSA support to SILC public key. + o Add DSS support. (***DONE) -lib/silcutil/silcstream.[ch] ****DONE**** -============================ + o Implement the defined SilcDH API. The definition is in + lib/silccrypt/silcdh.h. Make sure it is asynchronous so that it can + be accelerated. Also take into account that it could use elliptic + curves. - o Add abstract SilcStream. (***DONE) + o Add ECDSA support. + o Add ECDH support. -lib/silcutil/silcsocketstream.[ch] ****PARTY DONE**** -================================== + o AES CBC is missing proper alignment code (see silc_1_1_branch). - o Add SilcSocketStream (***DONE) + o All cipher, hash, hmac etc. allocation routines should take their name + in as const char * not const unsigned char *. (***DONE) - o Add SilcSocketStream for WIN32 (***TESTING NEEDED) - o Test QoS after the changes made to socket stream +SILC Accelerator Library +======================== + o SILC Accelerator API. Provides generic way to use different kind of + accelerators. Basically implements SILC PKCS API so that SilcPublicKey + and SilcPrivateKey can be used but they call the accelerators. + (***DONE) -lib/silcutil/silcschedule*.[ch] ****PARTLY DONE**** -=============================== + o Implement software accelerator. It is a thread pool system where the + public key and private key operations are executed in threads. + (***DONE) - o Scheduler can be optimized for FD tasks by changing the fd_queue - to SilcHashTable instead of using linked list. We need to do - one-to-one mapping of FD to task and hash table is more efficient - for this usage. + o Add init options to SilcAcceleratorObject as a SilcAcceleratorOption + structure. Each accelerator defines the options that they support and + can be retrieved from the SilcAccelerator with silc_acc_get_options. + The format must also be machine parseable. The structure can be of the + following format: - Also redefine the silc_select to perhaps return a separate - structure of the events that actually occurred, instead of - returning the events in the fd_list which is then traversed - in the generic code to find the changed events. This can be - made faster by having own struct which includes only the - changed events, thus the tarversing is faster since the whole - fd_list is not traversed anymore (it is still traversed in the - silc_select but at least it removes one extra tarversing later - for the same list). + typedef struct SilcAcceleratorOptionStruct { + const char *option; /* Option name */ + const char *display_name; /* Option displayable name */ + SilcParamType type; /* Option data format */ + void *default_value; /* Option's default value */ + SilcUInt32 default_value_len; /* Default value length */ + } *SilcAcceleratorOption; - Other task queues should be changed to use SilcList. (***DONE) + For software accelerator it could be for example: - o Add SILC scheduler's internal routines into a table of implementation - function pointers, that the generic code then takes as extern from - implementation. These are the silc_schedule_internal_* routines. - (***DONE) + { "min_threads", "Minimum threads", SILC_PARAM_UINT32, (void *)2, 4 }, + { "max_threads", "Maximum threads", SILC_PARAM_UINT32, (void *)4, 4 }, - o Change SILC_TASK_CALLBACK to non-static, and remove the macro - SILC_TASK_CALLBACK_GLOBAL. (***DONE) + o Diffie-Hellman acceleration - o SILC Schedule API changes to WIN32. (***TESTING NEEDED) + (o Symmetric key cryptosystem acceleration? They are always sycnhronouos + even with hardware acceleration so the crypto API shouldn't require + changes.) maybe -lib/silcutil/silcasync.[ch] ****DONE**** -=========================== +lib/silcmath +============ - o Add SilcAsyncOperation to utility library. Any function that takes - callback as an argument must/should return SilcAsyncOperation. - (***DONE) + o Import TFM. We want TFM's speed but its memory requirements are + just too much. By default it uses large pre-allocated tables which + will eat memory when there are thousands of public keys in system. + We probably want to change TFM's fp_int dynamic so that a specific + size can be allocated for the int. We could have two new functions: + SilcBool silc_mp_init_size(SilcMPInt *mp, SilcUInt32 bit_size); + SilcBool silc_mp_sinit_size(SilcStack stack, SilcMPInt *mp, + SilcUInt32 bit_size); -lib/silcutil/silctime.[ch] ****DONE**** -=========================== + Which by default allocates `bit_size' bits instead of some default + value. silc_mp_init would allocate the default FP_SIZE with TFM + and do normal init with TMA and GMP. _init_size with TMA and GMP + would be same as _init. - o SilcTime. (***DONE) + o Add AND, OR and XOR support to TFM or ask Tom to do it. - o system time, universal, generalized. (***DONE) + o The SILC MP API function must start returning indication of success + and failure of the operation. + o Do SilcStack support for silc_mp_init, silc_mp_init_size and other + any other MP function (including utility ones) that may allocate + memory. -lib/silcutil/silcfsm.[ch] ****DONE**** -========================= + o Prime generation progress using callback instead of printing to + stdout. - o SILC Finite State Machine API. Replaces SILC Protocol API (***DONE) + o All utility functions should be made non-allocating ones. -lib/silcutil/silcnet*, lib/silcutil/*/silc*net* ****PARTLY DONE**** -=============================================== +SILC XML Library, lib/silcxml/ +============================== - o Add UDP interface (***DONE) + o SILC XML API (wrapper to expat). Look at the expat API and simplify + it. The SILC XML API should have at most 8-10 API functions. It should + be possible to create full XML parser with only one function. And, it + should be possible to have a function that is able to parse an entire + XML document. It should also have a parser function to be able to + parse a stream of XML data (SilcStream). It MUST NOT have operations + that require multiple function calls to be able to execute that one + operation (like creating parser). - o Add UDP interface for WIN32 (***TESTING NEEDED) - o New network interfaces (***DONE) +lib/silcske/silcske.[ch] +======================== + + o Ratelimit to UDP/IP transport for incoming packets. -lib/silcmath ****PARTLY DONE**** +lib/silcasn1 ============ - o Test on x86_64. + o Negative integer encoding is missing, add it. - o Change LTM and TFM function names when importing to SILC tree to avoid - rare linking problems on system that has same named symbols already in - the system. (***DONE) + o SILC_ASN1_CHOICE should perhaps return an index what choice in the + choice list was found. Currently it is left for caller to figure out + which choice was found. (***DONE) + o SILC_ASN1_NULL in decoding should return SilcBool whether or not + the NULL was present. It's important when it's SILC_ASN1_OPTIONAL + and we need to know whether it was present or not. (***DONE) -lib/silcutil/symbian/ ****PARTLY DONE**** -===================== - o lib/silcutil/symbian routines missing or not completed. - (****TESTING NEEDED) +lib/silcpgp +=========== - o Something needs to be thought to the logging globals as well, - like silc_debug etc. They won't work on EPOC. Perhaps logging - and debugging is to be disabled on EPOC. + o OpenPGP certificate support, allowing the use of PGP public keys. -lib/silcasn1 ****PARTLY DONE**** +lib/silcssh +=========== + + o SSH2 public key/private key support, allowing the use of SSH2 keys. + RFC 4716. (***DONE) + + +lib/silcpkix ============ - o ASN.1 library (***DONE) + o PKIX implementation + + +apps/silcd +========== + + o Deprecate the old server. Write interface for the new lib/silcserver + server library. The interface should work on Unix/Linux systems. + + o Consider deprecating also the old config file format and use XML + istead. This should require SILC XML API implementation first. + + o The configuration must support dynamic router and server connections. + The silcd must work without specifying any servers or routers to + connect to. + + o The configuration must support specifying whether the server is + SILC Server or SILC Router. This should not be deduced from the + configuration as it was in < 1.2. + + o The configuration must support specifying the ciphers and hmacs and + their order so that user can specify which algorithms take preference. + + +lib/silcserver +============== + + o Rewrite the entire server. Deprecate apps/silcd as the main server + implementation and create lib/silcserver/. It is a platform + independent server library. The apps/silcd will merely provide a + a simple interface for the library. + + o Write the SILC Server library extensively using SILC FSM. + + o Server library must support multiple networks. This means that one + server must be able to create multiple connections that each reach + different SILC network. This means also that all cache's etc. must + be either connection-specific or network-specific. + + o Library must support dynamic router and server connections. This means + that connections are create only when they are needed, like when someone + says JOIN foo@foo.bar.com or WHOIS foobar@silcnet.org. + + o Library must support server-to-server connections even though protocol + prohibits that. The responder of the connection should automatically + act as a router. The two servers create an own, isolated, SILC network. + To be used specifically with dynamic connections. + + o Library must support multiple threads and must be entirely thread safe. + + o Library must have support for SERVICE command. + + o Both UDP and TCP support for incoming connecetions. Maintaining long + term UDP sessions. + + o The server must be able to run behind NAT device. This means that + Server ID must be based on public IP instead of private IP (See + also NAT detection protocol in SILC protocol specification). + + o The following data must be in per-connection context: client id cache, + server id cache, channel id cache, all statistics must be + per-connection. + + o The following data must be in per-thread context: command context + freelist/pool, pending commands, random number generator. + + o Do inccoming packet processing in an own FSM thread in the + server-threads FSM. Same as in client library. + + o Binding to other ports than 706 too. To allow easier traversing + through NATs and firewalls server should also bind to 80, 443 and 7706 + by default (at least try to bind). Connections must work normally + even if they were established to some other port other than 706. + + Connection option that attemps to connect to remot server with various + different mechanisms: UDP 706, TCP 706, TCP 80, TCP 443, UDP 7706 and + TCP 7706. This is the so called hole punching mechanism. + + o Ability to recover from rekey errors, at least try to. + + o Reference count all Silc*Entry structures. + + Some issues that must be kept in mind from 1.0 and 1.1 silcd's: + + o The server and router software MUST work out of the box. After + installation the server must not require any configuration to run the + most basic working configuration. No defining IP addresses, etc. + The server must work just by running it. + + o The SERVER_SIGNOFF notify handing is not optimal, because it'll + cause sending of multiple SIGNOFF notify's instead of the one + SERVER_SIGNOFF notify that the server received. This should be + optimized so that the only SERVER_SIGNOFF is sent and not + SIGNOFF of notify at all (using SIGNOFF takes the idea about + SERVER_SIGNOFF away entirely). + + o Another SERVER_SIGNOFF opt/bugfix: Currently the signoff is + sent to a client if it is on same channel as the client that + signoffed. However, the entire SERVER_SIGNOFF list is sent to + the client, ie. it may receive clients that was not on the + same channel. This is actually against the specs. It must be + done per channel. It shouldn't receive the whole list just + because one client happened to be on same channel. + + o If client's public key is saved in the server (and doing public key + authentication) then the hostname and the username information could + be taken from the public key. Should be a configuration option! - o Header documentation missing. (***DONE) + o Add a timeout to handling incoming JOIN commands. It should be + enforced that JOIN command is executed only once in a second or two + seconds. Now it is possible to accept n incoming JOIN commands + and process them without any timeouts. THis must be employed because + each JOIN command will create and distribute the new channel key + to everybody on the channel. - o Some string encodings missing (copy/paste matter). (***DONE) + o Related to above. If multiple JOINs are received in sequence perhaps + new key should be created only once, if the JOINs are handeled at the same + time. Now we create multiple keys and never end up using them because + many JOINs are processed at the same time in sequence. Only the last + key ends up being used.