-TODO for 1.1 And Beyond
+TODO for 1.2 And Beyond
=======================
-NOTE: Any item that doesn't have (***DONE) in it, isn't done yet.
+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.
-lib/silccore/silcpacket.[ch] ****DONE****
-============================
- o SilcPacketEngine. (***DONE)
+General
+=======
- o New SILC Packet API. (***DONE)
+ o Create apps/tutorial containing various Toolkit API tutorials.
+ 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:
-lib/silccore/silcpacket.[ch] ****PARTLY DONE****
-============================
+ SILC Toolkit SILC protocol, client and server library
+ SILC Runtime Toolkit runtime library
+ SILC Crypto Toolkit crypto, asn1, math, skr, pgp, etc.
- o IV Included flag support, UDP transport support (***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.
+ 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.
-lib/silccore/silcid.[ch] ****DONE****
-========================
-
- 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 silc_id_str2id, silc_id2str to non-allocating routines. (***DONE)
+ 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.
lib/silccore
============
- o All payload encoding routines should take SilcStack as argument.
+ o SILC_PACKET_FLAG_ACK support. Implement ACK packet and packet payload
+ to silcpacket.c.
+ o All payload encoding routines should take SilcStack as argument.
-lib/silcske/silcske.[ch]
-========================
+ o Remove SilcCommandCb from silccommand.h.
- o IV Included flag support in SKE (it currently doesn't accept it)
+ o All payload test routines into lib/silccore/tests/.
- o SilcConnAuth header file documentation.
+lib/silcclient, The Client Library
+==================================
-lib/silccrypt ****PARTLY DONE****
-=============
+ o UDP SILC connection support to SILC server
- o Implement the defined SilcDH API. The definition is in
- lib/silccrypt/silcdh.h.
+ o Giving WHOIS for nick that doesn't exist should remove any same
+ named entries from the client cache.
- o SSH2 public keys support, allowing the use of SSH2 public keys in
- SILC.
+ o peer-to-peer private messages
- o OpenPGP certificate support, allowing the use of PGP public keys
- in SILC.
+ o Private message key request notification to application. See XXX in
+ client_prvmsg.c.
- 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 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 Add DSS support.
+ 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 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 Message ACKing support.
- o Cipher optimizations (asm, that this) at least for i386 would be nice.
+ 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 ECDSA and ECDH.
+ 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 Ability to recover from rekey errors, at least try to.
-lib/silcutil ****PARTLY DONE****
-============
+
+Runtime library, lib/silcutil/
+==============================
+
+ o Fix universal time decoding (doesn't accept all formats) in silctime.c.
+
+ o Add functions to manipulate environment variables. (***DONE)
+
+ 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 Add directory opening/traversing functions
+
+ o silc_getopt routines
+
+ o 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.
+
+ 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 The SILC Event signals. Asynchronous events that can be created,
+ connected to and signalled. Either own event routines or glued into
+ SilcSchedule:
+
+ SilcTask silc_schedule_task_add_event(SilcSchedule schedule,
+ const char *event, ...);
+ SilcBool silc_schedule_event_connect(SilcSchedule schedule,
+ const char *event,
+ SilcTaskCallback event_callback,
+ void *context);
+ SilcBool silc_schedule_event_signal(SilcSchedule schedule,
+ const char *event, ...);
+
+ Example:
+ silc_schedule_task_add_event(schedule, "connected",
+ SILC_PARAM_UI32_INT,
+ SILC_PARAM_BUFFER,
+ SILC_PARAM_END);
+ silc_schedule_event_connect(schedule, "connected", connected_cb, ctx);
+ silc_schedule_event_signal(schedule, "connected", integer, buf,
+ SILC_PARAM_END);
+ SILC_TASK_CALLBACK(connected_cb)
+ {
+ FooCtx ctx = context;
+ va_list args;
+ SilcUInt32 integer;
+ SilcBuffer buf;
+
+ va_start(args, context);
+ integer = va_arg(args, SilcUInt32);
+ buf = va_arg(args, SilcBuffer);
+ va_end(args);
+ ...
+ }
+
+ Problems: Events would be SilcSchedule specific, and would not work on
+ multi-thread/multi-scheduler system. The events should be copyable
+ between schedulers. Another problem is the signal delivery. Do we
+ deliver them synchronously possibly from any thread to any other thread
+ or do we deliver them through the target schedulers. If we use the
+ schedulers then signalling would be asynchronous (data must be
+ duplicated and later freed) which is not very nice.
+
+ o If the event signals are added, the SILC_PARAM_* stuff needs to be
+ moved from silcbuffmt.h to silctypes.h or something similar.
+
+ 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.
+
+ SilcSchedule silc_schedule_init(int max_tasks, void *app_context,
+ SilcSchedule parent);
+ SilcSchedule silc_schedule_get_parent(SilcSchedule schedule);
+
+ 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 Structured log messages to Log API. Allows machine readable log
+ messages. Would allow sending of any kind of data in a log message.
+
+ o Base64 to an own API (***DONE)
+
+ o Timer API (***DONE)
+
+ 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 silc_stringprep to non-allocating version.
+ o silc_hash_table_replace -> silc_hash_table_set. Retain support for
+ silc_hash_table_replace as macro. (***DONE)
+
+ o SilcStack aware SilcHashTable. (***DONE)
+
+ o SilcStack aware SilcDList. (***DONE)
+
+ o Thread pool API. Add this to lib/silcutil/silcthread.[ch]. (***DONE)
+
+ o Fast mutex implementation. Fast rwlock implementation. Mutex and
+ rwlock implementation using atomic operations.
+
o Compression routines are missing. The protocol supports packet
compression thus it must be implemented. SILC Zip API must be
defined.
- 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 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 bool -> SilcBool (***DONE)
+ o silc_stack_alloc shouldn't require multiple by 8 size argument, it
+ should figure it out itself.
- o Silc FD Stream to WIN32 (lib/silcutil/silcfdstream.h)
+ o silc_malloc et. al. to respect --with-alignment.
+ o Add '%@' format to silc_snprintf functions. It marks for external
+ rendering function of following type:
-lib/silcutil/silcbuffer.h ****DONE****
-=========================
+ /* Snprintf rendering function. The `data' is rendered into a string
+ and allocated string is returned. If NULL is returned the
+ rendering is skipped and ignored. If the returned string does
+ not fit to the destination buffer it may be truncated. */
+ typedef char *(*SilcSnprintfRender)(void *data);
+
+ It can work like following:
+
+ char *id_renderer(void *data)
+ {
+ char tmp[32];
+ id_to_str(tmp, sizeof(tmp), (SilcID *)data);
+ return strdup(tmp);
+ }
- 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)
+ silc_snprintf(buf, sizeof(buf), "Client ID %@", id_renderer, client_id);
+ (***DONE)
+
+ o Change silc_gettimeofday on Unix to use clock_gettime with REALTIME
+ clock if it is available, otherwise use gettimeofday(). (***DONE)
+ (o SilcIpAddr abstraction. Ipv4 and Ipv6 support to the abstaction.)
+ maybe
-lib/silcutil/silcbuffmt.[ch] ****PARTLY DONE****
-============================
+ (o Generic SilcStatus or SilcResult that includes all possible status and
+ error conditions, including those of SILC protocol. Though, the SILC
+ protocol related status (currently in silcstatus.h) cannot be in
+ runtime library) maybe
- o SilcStack aware silc_buffer_unformat
+ (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 SilcStack aware silc_buffer_format (***DONE)
+ (o mmap) maybe
- o silc_buffer_format reallocates automatically (***DONE)
- o SILC_STR_OFFSET (***DONE)
+lib/silcutil/symbian/
+=====================
+ 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.
-lib/silcutil/silcstack.[ch] ****DONE****
+
+SFTP Library, lib/silcsftp/
===========================
- o Data stack implementation (***DONE)
+ o Read prefetch (read-ahead, reading ahead of time). Maybe if this can
+ be done easily.
-lib/silcutil/silcstream.[ch] ****DONE****
-============================
+SKR Library, lib/silcskr/
+=========================
- o Add abstract SilcStream. (***DONE)
+ o Add fingerprint as search constraint.
+ o Add OpenPGP support. Adding, removing, fetching PGP keys. (Keyring
+ support?)
-lib/silcutil/silcsocketstream.[ch] ****PARTY DONE****
-==================================
+ 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?).
- o Add SilcSocketStream (***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 Add SilcSocketStream for WIN32
+ 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 Test QoS after the changes made to socket stream
+ NULL argument would be ignored and skipped.
+ o Add OR logical rule in addition of the current default AND, eg:
-lib/silcutil/silcschedule*.[ch] ****DONE****
-===============================
+ // 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);
- 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.
+ // 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);
- 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).
+ o SilcStack to SKR API.
- Other task queues should be changed to use SilcList. (***DONE)
- 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)
+Crypto Library, lib/silccrypt/
+==============================
- o Change SILC_TASK_CALLBACK to non-static, and remove the macro
- SILC_TASK_CALLBACK_GLOBAL. (***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 SILC Schedule API changes to WIN32.
+ o Add fingerprint to SilcSILCPublicKey and retrieval to silcpk.h, and
+ possibly to silcpkcs.h.
+ /* 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);
-lib/silcutil/silcasync.[ch] ****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 Add SilcAsyncOperation to utility library. Any function that takes
- callback as an argument must/should return SilcAsyncOperation.
- (***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 Add DSA support to SILC public key.
-lib/silcutil/silctime.[ch] ****DONE****
-===========================
+ o Add DSS support. (***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 SilcTime. (***DONE)
+ o Add ECDSA support.
- o system time, universal, generalized. (***DONE)
+ o Add ECDH support.
+ o AES CBC is missing proper alignment code (see silc_1_1_branch).
-lib/silcutil/silcfsm.[ch] ****DONE****
-=========================
+ o All cipher, hash, hmac etc. allocation routines should take their name
+ in as const char * not const unsigned char *. (***DONE)
- o SILC Finite State Machine API. Replaces SILC Protocol API (***DONE)
+SILC Accelerator Library
+========================
-lib/silcutil/silcnet*, lib/silcutil/*/silc*net* ****PARTLY DONE****
-===============================================
+ 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)
- o Add UDP interface (***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 Add UDP interface for WIN32
+ 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:
- o New network interfaces (***DONE)
+ typedef struct SilcAcceleratorOptionStruct {
+ const char *option; /* Option name */
+ const char *display_name; /* Option displayable name */
+ SilcParamType type; /* Option data format */
+ } *SilcAcceleratorOption;
+ For software accelerator it could be for example:
-lib/silcutil/epoc/*
-===================
+ { "min_threads", "Minimum threads", SILC_PARAM_UINT32 },
+ { "max_threads", "Maximum threads", SILC_PARAM_UINT32 },
- o lib/silcutil/epoc routines missing or not completed.
+ The accelerator itself doesn't have to use the option structure to
+ parse the options if not wanted. It is defined for the caller so
+ they can learn the supported options in a well defined way.
- o The PKCS#1 also calls global RNG (even though it is not used
- currently in SILC, the interface allows its use).
+ o Diffie-Hellman acceleration
- 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 Symmetric key cryptosystem acceleration? They are always sycnhronouos
+ even with hardware acceleration so the crypto API shouldn't require
+ changes.) maybe
lib/silcmath
============
- o Import TFM. Talk to Tom to add the missing functions. Use TFM in
- client and client library, but TMA in server, due to the significantly
- increased memory consumption with TFM, and the rare need for public
- key operations in server.
+ 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);
+
+ 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 Add AND, OR and XOR support to TFM or ask Tom to do it.
o The SILC MP API function must start returning indication of success
and failure of the operation.
o All utility functions should be made non-allocating ones.
-lib/silcasn1 ****PARTLY DONE****
+SILC XML Library, lib/silcxml/
+==============================
+
+ 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).
+
+
+lib/silcske/silcske.[ch]
+========================
+
+ o Ratelimit to UDP/IP transport for incoming packets.
+
+
+lib/silcasn1
============
- o ASN.1 library (***DONE)
+ o Negative integer encoding is missing, add it.
- o Header documentation missing. (***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 Some string encodings missing (copy/paste matter). (***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)
- o Negative integer encoding
+
+lib/silcpgp
+===========
+
+ o OpenPGP certificate support, allowing the use of PGP public keys.
+
+
+lib/silcssh
+===========
+
+ o SSH2 public key/private key support, allowing the use of SSH2 keys.
+ RFC 4716. (***DONE)
lib/silcpkix
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 (Re)write commands/command replys.
+ 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 (Re)write notify handling.
+ 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.
+
+ 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 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
done per channel. It shouldn't receive the whole list just
because one client happened to be on same channel.
- o MAYBE: The SilcChannelClientEntry can be:
- SilcUInt32 address;
- SilcUInt32 mode;
-
- where address is SilcClientEntry address XOR SilcChannelEntry.
- You can get SilcClientEntry by doing client = chl->address XOR channel,
- and SilcChannelEntry by doing channel = chl->address XOR client.
- As long as the other pointer is always available when accessing the
- structure this can be done.
-
- o Add reference counters to all Silc*Entry structures
-
- o SERVICEs support (plugin, SIM)
-
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!
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 (Fix this to 0.9.x).
+ to everybody on the channel.
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.
-
- o The CMODE cipher & hmac change problem (#101).
-
-
-lib/silcclient
-==============
-
- o Some form of rewrite to make it more efficient.
-
- o Clear up interfaces.
-
- o Remove silc_client_run and silc_client_run_one from calling SilcSchedule.
- Leave the scheduling entirely to application.
projects / crypto.git / blobdiff