-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. 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.
-SILC Client ****PARTLY DONE****
-===========
-
- o Porting to new Toolkit API and new Client Library API
-
- o Improve help files, especially /cmode, /cumode and /key.
+General
+=======
-lib/silcclient, The Client Library ***PARTLY DONE****
-==================================
+ o Create apps/tutorial containing various Toolkit API tutorials.
- o silcclient.h clean up and API rewrites.
+ 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 silcclient_entry.h finishing, all entry relates APIs to this header.
+ SILC Toolkit SILC protocol, client and server library
+ SILC Runtime Toolkit runtime library
+ SILC Crypto Toolkit crypto, asn1, math, skr, pgp, etc.
- o SilcChannelEntry, SilcServerEntry, SilcChannelUser, allocating,
- freeing, finding, etc. rewrite. Also making them reference counted for
- multi threads use. (***DONE)
+ 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 Finish all the missing SILC packet processings, rewrites.
+ 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 The client_notify.c rewrite. (***TESTING NEEDED)
+ 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 Resuming to client_register.c (remove client_resume.c)
- (***TESTING NEEDED)
- o Rekey rewrite. (***DONE)
+lib/silccore
+============
- o Remove protocol.[ch]. (***DONE)
+ o SILC_PACKET_FLAG_ACK support. Implement ACK packet and packet payload
+ to silcpacket.c.
- o File transfer rewrite.
+ o All payload encoding routines should take SilcStack as argument.
- o Starting key exchange directly, rewrite. (***DONE)
+ o Remove SilcCommandCb from silccommand.h.
- o Channel messages, channel private keys, channel entires, channel
- search, etc. rewrite.
+ o All payload test routines into lib/silccore/tests/.
- 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.
- o Password auth test, public key auth test.
+lib/silcclient, The Client Library
+==================================
- o Key agreement rewrite. (***TESTING NEEDED)
+ o UDP SILC connection support to SILC server
- o Connecting to remote client (***DONE)
+ o Giving WHOIS for nick that doesn't exist should remove any same
+ named entries from the client cache.
o peer-to-peer private messages
- o Private message waiting API (in threads)
+ o Private message key request notification to application. See XXX in
+ client_prvmsg.c.
- o client_attrs.c, attributes rewrite. (***TESTING NEEDED)
+ 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 No SilcBuffer lists back to application in command_reply operations.
- Convert them all to real lists and/or structures for easier use.
- (***DONE)
+ 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 Nickname formatting rewrite. (***TESTING NEEDED)
+ 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 UDP connections. (***TESTING NEEDED)
+ o Message ACKing support.
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 All packet waiting timeout tests and error condition tests.
-
-
-lib/silcsftp
-============
-
- o Porting to use the new util library.
-
+ 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.
-lib/silccore/silcpacket.[ch] ****DONE****
-============================
+ o Ability to recover from rekey errors, at least try to.
- o SilcPacketEngine. (***DONE)
- o New SILC Packet API. (***DONE)
+Runtime library, lib/silcutil/
+==============================
+ o Fix universal time decoding (doesn't accept all formats) in silctime.c.
-lib/silccore/silcpacket.[ch] ****PARTLY DONE****
-============================
+ o Add functions to manipulate environment variables. (***DONE)
- o IV Included flag support, UDP transport support (***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 Add directory opening/traversing functions
-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_getopt routines (***DONE)
- o silc_id_str2id, silc_id2str to non-allocating routines. (***DONE)
+ o regex from /lib/contrib to lib/silcutil.
+ o The SILC Event signals. Asynchronous events that can be created,
+ connected to and signalled. Either own event routines or glued into
+ SilcSchedule. (***DONE)
-lib/silccore
-============
+ 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 All payload encoding routines should take SilcStack as argument.
+ 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.
- o All payload test routines into lib/silccore/tests/.
+ 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 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.
-lib/silcskr
-===========
+ 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 Removing key from the repository is not possible currently. It should
- be.
+ o Base64 to an own API (***DONE)
+ o Timer API (***DONE)
-lib/silcske/silcske.[ch] ****PARTLY 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 IV Included flag support in SKE (***DONE)
+ o silc_stringprep to non-allocating version.
- o UDP transport changes; retransmission support by using exponential
- backoff algorithm. (***DONE)
+ o silc_hash_table_replace -> silc_hash_table_set. Retain support for
+ silc_hash_table_replace as macro. (***DONE)
- o SilcConnAuth header file documentation.
+ o SilcStack aware SilcHashTable. (***DONE)
+ o SilcStack aware SilcDList. (***DONE)
-lib/silccrypt ****PARTLY DONE****
-=============
+ o Thread pool API. Add this to lib/silcutil/silcthread.[ch]. (***DONE)
- o Implement the defined SilcDH API. The definition is in
- lib/silccrypt/silcdh.h.
+ 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 SSH2 public keys support, allowing the use of SSH2 public keys in
- SILC.
+ o silc_stack_alloc shouldn't require multiple by 8 size argument, it
+ should figure it out itself. (***DONE)
- o OpenPGP certificate support, allowing the use of PGP public keys
- in SILC.
+ o silc_malloc et. al. to respect --with-alignment.
- 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.
+ o Add '%@' format to silc_snprintf functions.
(***DONE)
- o Add DSS support.
-
- o Assembler AES (***DONE)
-
- o ECDSA and ECDH.
+ o SILC Tls (Thread-local storage) API to lib/silcutil/silcthread.[ch].
+ (***DONE)
+ o Change silc_gettimeofday on Unix to use clock_gettime with REALTIME
+ clock if it is available, otherwise use gettimeofday(). (***DONE)
-lib/silcutil ****PARTLY DONE****
-============
+ o Generic SilcResult that includes all possible status and
+ error conditions and generic errno API. (***DONE)
- 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.
+ (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_stringprep to non-allocating version.
+ 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
+ (o Compression routines are missing. The protocol supports packet
compression thus it must be implemented. SILC Zip API must be
- defined.
+ defined.) maybe
- 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 SilcIpAddr abstraction. Ipv4 and Ipv6 support to the abstaction.)
+ maybe
- o bool -> SilcBool (***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 Silc FD Stream to WIN32 (lib/silcutil/silcfdstream.h)
+ (o Fast mutex implementation. Fast rwlock implementation. Mutex and
+ rwlock implementation using atomic operations.) not for now.
-lib/silcutil/silcbuffer.h ****DONE****
-=========================
+ (o mmap) maybe
- 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)
+lib/silcutil/symbian/
+=====================
-lib/silcutil/silcbuffmt.[ch] ****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 SilcStack aware silc_buffer_unformat (***DONE)
- o SilcStack aware silc_buffer_format (***DONE)
+SFTP Library, lib/silcsftp/
+===========================
- o silc_buffer_format reallocates automatically (***DONE)
+ o Read prefetch (read-ahead, reading ahead of time). Maybe if this can
+ be done easily.
- o SILC_STR_OFFSET (***DONE)
+SKR Library, lib/silcskr/
+=========================
-lib/silcutil/silcstack.[ch] ****DONE****
-===========================
+ o Add fingerprint as search constraint.
- o Data stack implementation (***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/silcstream.[ch] ****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 abstract SilcStream. (***DONE)
+ 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);
+ NULL argument would be ignored and skipped.
-lib/silcutil/silcsocketstream.[ch] ****PARTY DONE****
-==================================
+ o Add OR logical rule in addition of the current default AND, eg:
- o Add SilcSocketStream (***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 Add SilcSocketStream for WIN32
+ // 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 Handle EOS sending to upper layer properly
+ o SilcStack to SKR API.
- o Test QoS after the changes made to socket stream
+Crypto Library, lib/silccrypt/
+==============================
-lib/silcutil/silcschedule*.[ch] ****PARTLY 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 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 fingerprint to SilcSILCPublicKey and retrieval to silcpk.h, and
+ possibly to silcpkcs.h.
- 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).
+ /* 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);
- Other task queues should be changed to use SilcList. (***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 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)
+ 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.
- o Change SILC_TASK_CALLBACK to non-static, and remove the macro
- SILC_TASK_CALLBACK_GLOBAL. (***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 SILC Schedule API changes to WIN32.
+ o Add DSA support to SILC public key.
+ o Add DSS support. (***DONE)
-lib/silcutil/silcasync.[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 SilcAsyncOperation to utility library. Any function that takes
- callback as an argument must/should return SilcAsyncOperation.
- (***DONE)
+ o Add ECDSA support.
+ o Add ECDH support.
-lib/silcutil/silctime.[ch] ****DONE****
-===========================
+ o AES CBC is missing proper alignment code (see silc_1_1_branch).
- o SilcTime. (***DONE)
+ o All cipher, hash, hmac etc. allocation routines should take their name
+ in as const char * not const unsigned char *. (***DONE)
- o system time, universal, generalized. (***DONE)
+SILC Accelerator Library
+========================
-lib/silcutil/silcfsm.[ch] ****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 Implement software accelerator. It is a thread pool system where the
+ public key and private key operations are executed in threads.
+ (***DONE)
- o SILC Finite State Machine API. Replaces SILC Protocol API (***DONE)
+ 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:
+ 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;
-lib/silcutil/silcnet*, lib/silcutil/*/silc*net* ****PARTLY DONE****
-===============================================
+ For software accelerator it could be for example:
- o Add UDP interface (***DONE)
+ { "min_threads", "Minimum threads", SILC_PARAM_UINT32, (void *)2, 4 },
+ { "max_threads", "Maximum threads", SILC_PARAM_UINT32, (void *)4, 4 },
- o Add UDP interface for WIN32
+ o Diffie-Hellman acceleration
- o New network interfaces (***DONE)
+ (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:
- 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.
+ 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.
any other MP function (including utility ones) that may allocate
memory.
- o Test on x86_64.
+ o Prime generation progress using callback instead of printing to
+ stdout.
o All utility functions should be made non-allocating ones.
-lib/silcutil/symbian/ ****PARTLY DONE****
-=====================
+SILC XML Library, lib/silcxml/
+==============================
- o lib/silcutil/symbian routines missing or not completed.
- (****TESTING NEEDED)
+ 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 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 Ratelimit to UDP/IP transport for incoming packets.
-lib/silcasn1 ****PARTLY DONE****
+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 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 (Re)write notify handling.
+ 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
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).
projects / crypto.git / blobdiff