+<br />
+<font size="+2">Using SILC Client Library</font>
- SILC Client Library Manual
+<br /> <br /> <br />
+<b>1.0 Introduction</b>
- Version 0.7.4
-
-1.0 Introduction
-
-SILC Client library is a full featured SILC Client protocolimplementation.
+<br /> <br />
+SILC Client library is a full featured SILC Client protocol implementation.
The library has been designed to be complete SILC client without actual
user interface. The library provides the API for the appliation which
it can use to implement generally whatever user interface it wants. The
common and core compomnent of SILC protocol from the lib/silccore, SKE
from lib/silcske and general utility routines from lib/silcutil.
+<br /> <br />
The `silcapi.h' file defines the function prototypes that application
must implement in order to be able to create the user interface with the
library. The idea is that the application can implement whatever user
for sending channel and private messages, client and channel retrieval
and other utility functions.
+<br /> <br /> <br />
+<b>1.0.1 Including Library Headers</b>
-1.0.1 Including Library Headers
-
+<br /> <br />
Your application must include the following includes in your sources to
get access all SILC Client Library routines:
-#include "silcincludes.h"
+<br /> <br />
+<tt>
+#include "silcincludes.h"<br />
#include "clientlibincludes.h"
+</tt>
+<br /> <br />
If you are compiling with C++ compiler then you need to include the
headers as follows:
-extern "C" {
-#include "silcincludes.h"
-#include "clientlibincludes.h"
+<br /> <br />
+<tt>
+extern "C" {<br />
+#include "silcincludes.h"<br />
+#include "clientlibincludes.h"<br &/>
}
+</tt>
-1.1 Creating Client
+<br /> <br /> <br />
+<b>1.1 Creating Client</b>
+<br /> <br />
The client is context or entity based, so several client entitites can
be created in the application if needed. However, it should be noted
that they are completely independent from each other and can be seen
as different applications. Usually only one client entity is needed
per application.
+<br /> <br />
The client object is SilcClient which is usually allocated in following
manner:
- SilcClient client = silc_client_alloc(&ops, context, version);
+<br /> <br />
+<tt> SilcClient client = silc_client_alloc(&ops, params, context, version);</tt>
+<br /> <br />
`ops' is the static structure of client operations that library will call.
`context' can be some application specific context that will be saved into
the SilcClient object. It is up to the caller to free this context.
specific context can be retrieved from the SilcClient object. See
`client.h' file for detailed definition of SilcClient object.
+<br /> <br />
`ops' can be defined for example as follows:
-SilcClientOperations ops = {
- silc_say,
- silc_channel_message,
- silc_private_message,
- silc_notify,
- silc_command,
- silc_command_reply,
- silc_connect,
- silc_disconnect,
- silc_get_auth_method,
- silc_verify_public_key,
- silc_ask_passphrase,
- silc_failure,
- silc_key_agreement,
-};
-
+<br /> <br />
+<tt>
+SilcClientOperations ops = {<br />
+ silc_say,<br />
+ silc_channel_message,<br />
+ silc_private_message,<br />
+ silc_notify,<br />
+ silc_command,<br />
+ silc_command_reply,<br />
+ silc_connect,<br />
+ silc_disconnect,<br />
+ silc_get_auth_method,<br />
+ silc_verify_public_key,<br />
+ silc_ask_passphrase,<br />
+ silc_failure,<br />
+ silc_key_agreement,<br />
+};<br />
+</tt>
+
+<br /> <br />
Please see the `client_ops_example.c' source file in lib/silcclient/
directory for predefined structure and stub functions for your
-convenince. It is provided for programmers so that they can copy
+convenience. It is provided for programmers so that they can copy
it and use it directly in their application.
-1.2 Initializing the Client
+<br /> <br /> <br />
+<b>1.2 Initializing the Client</b>
+<br /> <br />
The client must be initialized before running. However, there are also
some other tasks that must be done before initializing the client.
The following pointers must be set by the application before calling
the initializing function:
- client->username
- client->hostname
- client->realname
- client->pkcs
- client->public_key
- client->private_key
-
+<br /> <br />
+<tt>
+ client->username<br />
+ client->hostname<br />
+ client->realname<br />
+ client->pkcs<br />
+ client->public_key<br />
+ client->private_key
+</tt>
+
+<br /> <br />
You may also set client->nickname if you want. If it is set then the
library will change the nickname to that one after the client is connected
to the server. If not set, then server will initially give the nickname
which is same as the username.
+<br /> <br />
After setting the pointers one must call:
- silc_client_init(client);
+<br /> <br />
+<tt> silc_client_init(client);</tt>
+<br /> <br />
which then initializes the client library for the `client'. If the
pointers mentioned above are not initialized the silc_client_init will
fail. The application should check the return value of the silc_client_init
function.
-1.3 Running the Client
+<br /> <br /> <br />
+<b>1.3 Running the Client</b>
+<br /> <br />
The client is run by calling silc_client_run. The function will call
the scheduler from utility library that will be run until the program is
ended. When silc_client_run returns the application is ended. Thus,
to run the client, call:
- silc_client_run(client);
+<br /> <br />
+<tt> silc_client_run(client);</tt>
+<br /> <br />
Usually application may do some other initializations before calling
this function. For example before calling this function application
should initialize the user interface.
-1.3.1 Running the Client in GUI application
+<br /> <br /> <br />
+<b>1.3.1 Running the Client in GUI application</b>
+<br /> <br />
Many GUI applications has their own main loop or event loop, which they
would like to use or are forced to use by the underlaying system. If you
are developing for example GUI application on Unix system, and you are
process incoming data and send outgoing data, but it is guaranteed that it
will not block the calling process.
+<br /> <br />
It is suggested that you would call this function as many times in a
second as possible to provide smooth action for the client library. You
can use an timeout task, or an idle task provided by your GUI library to
silc_client_run_one every 50 milliseconds, and it should be sufficient for
smooth working.
+<br /> <br />
For Win32 the silc_client_run can be used instead of using the Windows's
own event loop. However, if you would like to use the silc_client_run_one
also on Win32 systems it is possible.
-1.3.1.1 Running Client in GTK--
+<br /> <br /> <br />
+<b>1.3.1.1 Running Client in GTK--</b>
+<br /> <br />
Here is a short example how to run the SILC Client libary under the
Gnome/GTK--'s main loop:
-gint YourClass::silc_scheduler()
-{
- // Run the SILC client once, and return immediately. This function
- // is called every 50 milliseconds by the Gnome main loop, to process
- // SILC stuff. This function will read data, and write data to network,
- // etc. Makes the client library tick! :)
- silc_client_run_one(silc_client);
- return 1;
-}
-
+<br /> <br />
+<tt>
+gint YourClass::silc_scheduler()<br />
+{<br />
+ // Run the SILC client once, and return immediately. This function<br />
+ // is called every 50 milliseconds by the Gnome main loop, to process<br />
+ // SILC stuff. This function will read data, and write data to network,<br />
+ // etc. Makes the client library tick! :)<br />
+ silc_client_run_one(silc_client);<br />
+ return 1;<br />
+}<br />
+</tt>
+
+<br /> <br />
then, during initialization of the SILC Client call:
- // Setup SILC scheduler as timeout task. This will handle the SILC
- // client library every 50 milliseconds. It will actually make the
- // SILC client work on background.
- Gnome::Main::timeout.connect(slot(this, &YourClass::silc_scheduler), 50);
+<br /> <br />
+<tt>
+// Setup SILC scheduler as timeout task. This will handle the SILC<br />
+// client library every 50 milliseconds. It will actually make the<br />
+// SILC client work on background.<br />
+Gnome::Main::timeout.connect(slot(this, &YourClass::silc_scheduler), 50);<br />
+</tt>
+<br /> <br />
This will call the function silc_scheduler every 50 millisecconds, which
on the otherhand will call silc_client_run_one, which will make the SILC
Client library work on the background of the GUI application.
-1.4 Creating Connection to Server
+<br /> <br /> <br />
+<b>1.4 Creating Connection to Server</b>
+<br /> <br />
Connection to remote SILC server is done by calling:
- silc_client_connect_to_server(client, port, hostname, context);
+<br /> <br />
+<tt> silc_client_connect_to_server(client, port, hostname, context);</tt>
+<br /> <br />
The function will create the connection asynchronously to the server, ie.
the function will return before the actual connection is created. After
the connection is created the client->ops->connect operation is called.
+<br /> <br />
Generally speaking the connections are associated with windows' on the
screen. IRC is usually implemented this way, however it is not the
necessary way to associate the client's connections. SilcClientConnection
application (window or something else).
-1.4.1 Using Own Connecting
+<br /> <br /> <br />
+<b>1.4.1 Using Own Connecting</b>
+<br /> <br />
Application might not want to use silc_client_connect_to_server function
if it wants to perform its own connecting for some reason. In this case
application must call function silc_client_start_key_exchange after it
exhange protocol between the client and server and the library takes care
of everything after that.
+<br /> <br />
After connection has been created application must call:
- SilcClientConnection conn;
+<br /> <br />
+<tt>
+ SilcClientConnection conn;
- /* Add new connection to client */
- conn = silc_client_add_connection(client, hostname, port, context);
+<br /> <br />
+ /* Add new connection to client */<br />
+ conn = silc_client_add_connection(client, hostname, port, context);
- /* Start key exchange and let the library handle everything
- after this point on. */
- silc_client_start_key_exchange(client, conn, sock);
+<br /> <br />
+ /* Start key exchange and let the library handle everything<br />
+ after this point on. */<br />
+ silc_client_start_key_exchange(client, conn, sock);
+</tt>
+<br /> <br />
NOTE: These calls are performed only and only if application did not call
silc_client_connect_to_server function, but performed the connecting
process manually.
-1.5 Example Client
+<br /> <br /> <br />
+<b>1.5 Example Client</b>
+<br /> <br />
This section includes an example SILC client implementation in pseudo-like
C code. It creates and initializes the client and sets up an imaginary
user interface. The user will use the user interface then to create
the connections. The SilcClientOperations are expected to be implemented.
+<br /> <br />
+<pre>
#include "silcincludes.h"
#include "silcapi.h"
/* Client is ended */
return 0;
}
+</pre>
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