TODO/bugs in Irssi SILC client
==============================
- o -n and -c options does not work.
-
- o Switching servers while on channel is supposed to crash the client?
-
o Add local command to switch the channel's private key when channel has
several private keys. Currently sending channel messages with many
keys is not possible because changing the key is not possible by the
user.
+ o JOINing to +a (requires passphrase to JOIN) does not work on autojoin.
+ Seems the passwords in the .silc/config has no effect.
+
o Add local commands to list the current server and client public keys
that the user has. And a local command to dump the contents of the
public key to the screen. Something like LISTKEYS, SHOWKEY...
cipher, hash, hmac and pkcs configuration to the Irssi SILC's config
file.
- o The QUIT command should wait for servers disconnection (at least for
- a while) before exiting the application.
-
o Add PERL scripting support from Irssi CVS.
o Extend the /HELP command to support sub commands or something. So
TODO/bugs In SILC Client Library
================================
- o The public key authentication is missing for example in OPER and SILCOPER
- commands. See the XXX's in the lib/silcclient/command.c.
+ o Rewrite the channel's user list thingy and cross list it to the
+ Client entry.
- o The client library must manage somehow when receiving client that has
- same nickname, same server, same username but different Client ID than
- what we have in the cache. It is now assumed that they are different
- client but it might not be. It should at least number the clients
- using the client->num so that they can be accessed from the user
- interface separately or it could just remove the old client unless
- it is on some channels.
+ o The PRIVATE_MESSAGE_KEY packet is not handled (it is implemented
+ though). This should be added and perhaps new client operation
+ should be added to notify application that it was received and
+ set the key only if application wishes to set (accept the key) it.
+
+ o Additions to do after protocol version 1.1:
+
+ o Fix the NICK_CHANGE notify handling not to create new entry
+ for the changed client, but take the nickname from the notify
+ (removes need for resolving as well). Protocol TODO entry 3.
+
+ o Add support for list of errors in command replies. Protocol
+ TODO entry 1.
TODO/bugs In SILC Server
========================
- o Add perhaps /var/run/silcd.pid for PID information for the server.
+ o If server send CUMODE_CHANGE notify (like setting founder) to router
+ and router does not have founder on channel (founder is left or there's
+ no founder on channel at all), the router will accept the server's
+ founder mode change, even though it perhaps should not do that.
+
+ o Make the normal server save user counts with LIST command reply.
- o Incomplete IPv6 support:
+ o The router should check for validity of received notify packets from
+ servers (after all buggy servers may send notify that is actually
+ something that should have not been sent).
- o silcd/serverid.c and its routines supports only IPv4.
+ o Add hashed passwords to silcd.conf file.
- o The backup router support described in the protocol specification
- should be done at some point.
+ o Backup router related issues
- o New configuration file format must be added. The new one will be
- done using the dotconf config library (lib/dotconf). The following
+ o Channel user mode changes are notified unnecessarely when
+ switching to backup router on router crash.
+
+ 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 New configuration file format must be added. The following
tasks relates closely to this as well and must be done at the same time
when adding the new config file format:
o IP address fields in configuration file should accept mask
format as well, IP/MASK, and not just plain IP.
- o Connection classes should be actually implemented in
- serverconfig.c. They can be defined but they are totally
- ignored currently. And they should be redefined also.
+ o Lots of statistics updating is missing around the server.
+
+ 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!
TODO/bugs In SILC Libraries
===========================
- o Some ./prepare problems with latest autoconf and automake.
+ o WIN32 silc_net_create_connection_async does not work the same way
+ than on Unix. Do it with threads on WIN32. The function works but
+ is not actually async currently.
- o Remove the mlock() stuff from the lib/silcutil/silcmemory.c, they
- are redundant.
+ o Rewrite the lib/silcsim/silcsim.h. The SilcSimContext should be
+ private and silc_sim_alloc should take necessary arguments.
- o Compression routines are missing. The protocol supports packet
- compression thus it must be implemented. SILC Comp API must be
- defined. zlib package is already included into the lib dir (in CVS,
- not in distribution), but it is not used yet, and it requires some
- tweaking on the Makefiles (we want static lib not shared).
-
- o All payload parsing (decoding) functions should take unsigned char *
- and uint32 as data and data length as arguments. Now some of the
- routines do already that but most of the routines use SilcBuffer.
- The SilcBuffer ones should be removed since buf->data and buf->len
- is more convenient to use. However, the silc_buffer_[un]format
- routines support only SilcBuffer so they would require reallocation
- of SilcBuffer. Maybe support for raw data (and not just SilcBuffer)
- should be added silc_buffer_[un]format_? routines. These are currently
- only cosmetic changes but at some point must be done to make the
- payload interfaces consistent.
-
- o Incomplete IPv6 support:
-
- o All network routines in lib/silcutil/silcnet.[ch] does not
- support IPv6.
- o silc_id_render supports only IPv4 based ID's in the file
- lib/silcutil/silcutil.c.
- 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.
-
-
-TODO/Bugs in native WIN32 support (libraries)
-=============================================
-
- o silc_net_create_connection_async does not work the same way than on
- Unix. Do it with threads on WIN32.
-
-
-TODO In SILC Protocol
+TODO in SILC Protocol
=====================
- o If channel founder mode is set and the invite mode is set on channel
- then the founder should be added to the list automatically so that
- if the founder signoff's it will be able join again to the invite only
- channel wihtout being invited.
+Current protocol version is 1.0. However, it is far from being perfect,
+and needs to include additional features. Following protocol TODO entries
+describe new stuff to be added to protocol versions 1.x.
+
+ 1. Re-define the Status Payload: it is now 16 bits, split it into two
+ 8 bits fields. First field includes status types from 0 - 9 and
+ 10 - n *if* it is not an list of errors. If it is list of errors then
+ the first field includes 1, 2 and/or 3, and the second field includes
+ the error status 10 - n. This way it is possible to send multiple
+ errors (list of errors) and we have a way to tell the receiver that
+ there will be other errors as well. The second field is used only
+ if there is list of errors. If normal status, or normal (single)
+ error status the second field is set to zero, and must be ignored.
+ Hence, the status works same way as now except for list of errors.
+ To be included in protocol version 1.1.
+
+ 2. Define that WHOIS and IDENTIFY commands must send list of errors
+ if multiple Client ID (or Channel ID and Server ID for IDENTIFY) was
+ requested and was not found. Each unfound entry must cause an error
+ command reply to the sender. Also define that errors must be sent
+ *after* sending successfully found entries (this way receiver may
+ ignore them). To be included in protocol version 1.1.
+
+ 3. Define the NICK_CHANGE notify to send the changed nickname as a new
+ third argument. This will make the NICK_CHANGE notify handling easier
+ in the receiver's end (client primarily) since it removes the
+ requirement that receiver must resolve (using IDENTIFY or WHOIS) the
+ new Client ID received in the notify (because of the new nickname is
+ unknown). To be included in protocol version 1.1.
+
+ 4. Add "request parameters" or similar to the WHOIS command, which can
+ be used to request various parameters (something not returned by
+ standard WHOIS command) about clients (info that could be fetched
+ even from clients). Additional specification (or appendix) should
+ be done to define the payload and the parameters. It could be used
+ to make the WHOIS command support various search conditions as well.
+ This would be the way to extend the WHOIS command to support various
+ new features without always making the command incompatible to previous
+ version. To be included in protocol version 1.1.
+
+ 5. Inviting and banning by public key should be made possible. To be
+ included in protocol version 1.x.
+
+ 6. Add perhaps SILENCE_USERS, SILENCE_OPERS channel user modes which
+ can be used to silence (moderate) normal users and opers (this set
+ only by founder). To be included in protocol version 1.1.
+
+ 7. Channel Message Payload needs slight redesining to include the IV
+ field to the MAC generation of the payload. It is authenticated
+ by the packet's MAC but not by the payload's MAC. Since the IV
+ belongs to the payload, its integrity should be protected by the
+ payload MAC and not alone by packet MAC. To be included in protocol
+ version 1.1.
+
+ 8. Remove the administrative commands from the protocol all together.
+ It does not make sense for the protocol to define how a server is
+ reconnected or shutdown, since they are implementation and
+ configuration issues. Besides protocol provides only limited set of
+ administrative commands and cannot define all that one could imagine.
+ To be included in protocol version 1.1.
+
+ 9. Add SILC_MESAGE_FLAG_REPLY for being other side to the
+ SILC_MESSAGE_FLAG_REQUEST. Add generic SILC_MESSAGE_FLAG_DATA, which
+ can include generic payload, which can include generic data. The
+ payload definition is left out for now. To be included in protocol
+ version 1.1.
+
+ 10. Check command reply error status types in various commands,
+ specifically NO_FOPRIV is missing from many commands. To be
+ included in protocol version 1.1.
TODO After 1.0
==============
+A rough list of stuff that is going to be done to SILC after 1.0 or at
+least could be done.
+
+ o Implement the defined SilcDH API. The definition is in
+ lib/silccrypt/silcdh.h.
+
o X.509 certificate support. SILC protocol supports certificates and
it would be great to have support for them. This is a big task as
support has to be made for ASN.1 as well. I've looked into OpenSSL
to start writing one myself. Anyhow, the OpenSSL X.509 lib should
be checked.
- Other package that should be checked is the NSS's X509 library.
+ Other package that should be checked is the NSS's X509 library,
+ which I like more over OpenSSL package.
- o SSH2 public keys support. Maybe - not really needed but could be
- nice as SSH is widely used all over the place. SILC Protocol
- supports SSH2 public keys.
+ o SSH2 public keys support, allowing the use of SSH2 public keys in
+ SILC.
+
+ o OpenPGP certificate support, allowing the use of PGP public keys
+ in SILC.
+
+ o Compression routines are missing. The protocol supports packet
+ compression thus it must be implemented. SILC Zip API must be
+ defined.
+
+ o Rewrite the lib/silcutil/silcprotocol.[ch] not to have [un]register
+ functions, but to make it context based all the way. The alloc should
+ take as argument the protocol type and its callback (not only
+ final callback). It is not good that we have now global list of
+ registered protocols.
+
+ o Optimizations in Libraries
+
+ o There is currently three (3) allocations per packet in the
+ silc_packet_receive_process, which is used to process and
+ dispatch all packets in the packet queue to the parser callback
+ function. First allocation is for parse_ctx, second for the
+ SilcPacketContext, and third for packet->buffer where the actual
+ data is saved.
+
+ The parse_ctx allocation can be removed by adding it as a
+ structure to the SilcPacketContext. When the SilcPacketContext
+ is allocated there is space for the parse context already.
+
+ The silc_packet_context_alloc could have a free list of
+ packet contexts. If free packet context is found from the list
+ it is returned instead of allocating a new one. The library
+ could at first allocate them and save them to the free list
+ until enough contexts for smooth processing exists in the list.
+ This would remove a big allocation since the structure is
+ quite big, and even bigger if it would include the parse_ctx.
+
+ The packet->buffer can be optimized too if the SilcBuffer
+ interface would support free lists as well. Maybe such could
+ be done in the same way as for SilcPacketContext. The
+ silc_buffer_alloc would check free list before actually
+ allocating new memory. Since the packets in the SILC protocol
+ usually are about the same size (due to padding) it would be
+ easy to find suitable size buffer from the free list very
+ quickly.
+
+ These naturally cause the overal memory consumption to grow
+ but would take away many allocations that can be done several
+ times in a second.
+
+ o Move the actual file descriptor task callback (the callback that
+ handles the incoming data, outgoing data etc, that is implemnted
+ in server and client separately (silc_server_packet_process and
+ silc_client_packet_proces)) to the low level socket connection
+ handling routines, and create an interface where the application
+ can register a callbacks for incoming data, outoing data and EOF
+ receiving, which the library will call when necessary. This way
+ we can move the data handling in one place.
+
+ 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.
+
+ 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.
+
+ Add also perhaps function silc_buffer_alloc_size that would
+ effectively do:
+
+ return silc_buffer_pull_tail(silc_buffer_alloc(size),
+ size);
+
+ to not require the user to give the pull_tail anymore.
+
+ o Optimizations in Server
+
+ o Remove the big switch statement from the function
+ silc_server_packet_parse_type and replace it with predefined
+ table of function pointers where each of the slot in table
+ represents the packet type value.
+
+ Same could be done with notify packets which has big switch
+ statement too. Same kind of table of notify callbacks could be
+ done as well.
+
+ o The parser callback in the server will add a timeout task for
+ all packets. It will require registering and allocating a
+ new task to the SilcSchedule. Maybe, at least, for server
+ and router packets the parser would be called immediately
+ instead of adding it to the scheduler with 0 timeout. It
+ should be analyzed too how slow the task registering process
+ actually is, and find out ways to optimize 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 Add SilcAsyncOperation to utility library. Any function that takes
+ callback as an argument must return SilcAsyncOperation.
o Cipher optimizations (asm, that this) at least for i386 would be nice.
+
+ 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.
projects / silc.git / blobdiff