5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 2000 - 2008 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
20 /****h* silcclient/Client Library Interface
24 * This interface defines the SILC Client Library API for the application.
25 * The Client Library is a full featured SILC client without user interface.
26 * A simple interface called SILC Client Operations (SilcClientOperations)
27 * is provided for applications to implmeent the necessary functions to use
28 * the client library. The silcclient.h header file includes client library
29 * API, such as command handling and message sending. The silcclient_entry.h
30 * header file includes entry handling, such as channel and user entry
33 * Practically all functions in the Client Library API accepts SilcClient
34 * and SilcClientConnection as their first two argument. The first argument
35 * is the actual SilcClient context and the second is the SilcClientConnection
36 * context of the connection in question. Application may create and handle
37 * multiple connections in one SilcClient. Connections can be created to
38 * servers and other clients.
40 * The Client Library support multiple threads and is threads safe if used
41 * correctly. Messages can be sent from multiple threads without any
42 * locking. Messages however are always received only in one thread unless
43 * message waiting (see silc_client_private_message_wait as an example) is
44 * used. The threads can be turned on and off by giving a parameter to the
45 * SilcClient. When turned on, each new connection to remote host is always
46 * executed in an own thread. All tasks related to that connection are then
47 * executed in that thread. This means that client operation callbacks for
48 * that connections may be called from threads and application will need to
49 * employ concurrency control if the callbacks need to access shared data
50 * in the application. Messages are also received in that thread.
62 #include "silcclient_entry.h"
64 /* General definitions */
66 /****d* silcclient/SilcClientAPI/SilcClientConnectionStatus
70 * typedef enum { ... } SilcClientConnectionStatus
74 * This type is returned to the `connect' client operation to indicate
75 * the status of the created connection. It can indicate if it was
76 * successful or whether an error occurred.
81 SILC_CLIENT_CONN_SUCCESS, /* Successfully connected */
82 SILC_CLIENT_CONN_SUCCESS_RESUME, /* Successfully connected and
83 resumed old detached session */
84 SILC_CLIENT_CONN_DISCONNECTED, /* Remote host disconnected */
85 SILC_CLIENT_CONN_ERROR, /* Error occurred during connecting */
86 SILC_CLIENT_CONN_ERROR_KE, /* Key Exchange failed */
87 SILC_CLIENT_CONN_ERROR_AUTH, /* Authentication failed */
88 SILC_CLIENT_CONN_ERROR_RESUME, /* Resuming failed */
89 SILC_CLIENT_CONN_ERROR_TIMEOUT, /* Timeout during connecting */
90 } SilcClientConnectionStatus;
93 /****f* silcclient/SilcClientAPI/SilcClientRunning
97 * typedef void (*SilcClientRunning)(SilcClient client, void *context);
101 * The callback given as argument to silc_client_init function. Once
102 * this is called the client library is running and application may
103 * start using the Client library API.
106 typedef void (*SilcClientRunning)(SilcClient client, void *context);
108 /****f* silcclient/SilcClientAPI/SilcClientStopped
112 * typedef void (*SilcClientStopped)(SilcClient client, void *context);
116 * The callback given as argument to silc_client_stop. Once this is
117 * called the client library has stopped and can be freed by calling
118 * silc_client_free. Note that this won't be called if there are
119 * active connections in the client. Connections must first be closed
120 * by calling silc_client_close_connection or by sending QUIT command to
121 * the server connection.
124 typedef void (*SilcClientStopped)(SilcClient client, void *context);
126 /****f* silcclient/SilcClientAPI/SilcClientConnectCallback
130 * void (*SilcClientConnectCallback)(SilcClient client,
131 * SilcClientConnection conn,
132 * SilcClientConnectionStatus status,
134 * const char *message,
139 * Connect callbak given as argument to silc_client_connect_to_server,
140 * silc_client_connect_to_client and silc_client_key_exchange functions.
141 * It is called to indicate the status of the connection, indicated
142 * by the `status'. It is called after the connection has been
143 * established to the remote host and when connection is disconnected
144 * by the remote host. The `context' is the context given as argument
145 * to the connecting function. If the `status' is an error the `error'
146 * may indicate more detailed error. If `error' is SILC_STATUS_OK no
147 * detailed error message is available.
149 * When the `status' is SILC_CLIENT_CONN_DISCONNECTED the `error' will
150 * indicate the reason for disconnection. If the `message' is non-NULL
151 * it delivers error or disconnection message.
153 * The `conn' is the connection to the remote host. In case error
154 * occurred the `conn' may be NULL, however, in some cases a valid `conn'
155 * is returned even in error. If `conn' is non-NULL the receiver is
156 * responsible of closing the connection with silc_client_close_connection
157 * function, except when SILC_CLINET_CONN_DISCONNECTED or some error
158 * was received. In these cases the library will close the connection.
161 typedef void (*SilcClientConnectCallback)(SilcClient client,
162 SilcClientConnection conn,
163 SilcClientConnectionStatus status,
168 /****s* silcclient/SilcClientAPI/SilcClient
172 * typedef struct SilcClientStruct { ... } *SilcClient
176 * This is the actual SILC Client structure which represents one
177 * SILC Client. It is allocated with the silc_client_alloc function
178 * and given as argument to all SILC Client Library functions. It
179 * is initialized with silc_client_init function, and freed with
180 * silc_client_free function.
182 * This context represents the client. Each connection to remote server
183 * is represented by SilcClientConnection context.
187 struct SilcClientStruct {
188 char *username; /* Username */
189 char *hostname; /* hostname */
190 char *realname; /* Real name */
191 SilcSchedule schedule; /* Client scheduler */
192 SilcRng rng; /* Random number generator */
193 void *application; /* Application specific context, set with
194 silc_client_alloc. */
196 /* Internal data for client library. Application cannot access this. */
197 SilcClientInternal internal;
201 /****s* silcclient/SilcClientAPI/SilcClientConnection
205 * typedef struct SilcClientConnectionStruct { ... }
206 * *SilcClientConnection
210 * This structure represents a connection. It is allocated and freed by
211 * the library. It is returned to application in SilcClientConnectCallback.
212 * It includes all the important data for the session such as local
213 * client entry (which includes current nickname), local and remote IDs,
214 * and other information. All strings in the structure are UTF-8 encoded.
218 struct SilcClientConnectionStruct {
219 SilcClientEntry local_entry; /* Our own Client Entry */
220 SilcClientID *local_id; /* Our current Client ID */
222 char *remote_host; /* Remote host name */
223 int remote_port; /* Remote port */
224 SilcID remote_id; /* Remote ID */
226 SilcChannelEntry current_channel; /* Current joined channel */
227 SilcPublicKey public_key; /* Public key used in this connection */
228 SilcPrivateKey private_key; /* Private key */
229 SilcPacketStream stream; /* Connection to remote host */
230 SilcStream socket_stream; /* Socket stream from 'stream' */
231 SilcSocket sock; /* The socket from 'socket_stream' */
232 SilcConnectionType type; /* Connection type */
233 SilcClientConnectCallback callback; /* Connection callback */
234 void *callback_context; /* Connection context */
235 SilcClient client; /* Pointer back to SilcClient */
237 /* Application specific data. Application may set here whatever it wants. */
240 /* Internal data for client library. Application cannot access this. */
241 SilcClientConnectionInternal internal;
245 /****s* silcclient/SilcClientAPI/SilcChannelUser
249 * typedef struct SilcChannelUserStruct { ... } *SilcChannelUser
253 * This structure represents a client that has joined to a channel.
254 * It shows the client and the channel and the client's mode (channel
255 * user mode) on the channel.
259 struct SilcChannelUserStruct {
260 SilcClientEntry client; /* Client joined on channel */
261 SilcUInt32 mode; /* mode, ChannelUserModes */
262 SilcChannelEntry channel; /* The channel user has joined */
264 /* Application specific data. Application may set here whatever it wants. */
269 /****s* silcclient/SilcClientAPI/SilcClientStats
273 * typedef struct { ... } SilcClientStats;
277 * This structure holds SILC network statistics returned by the
278 * SILC_COMMAND_STATS command reply to the application.
282 typedef struct SilcClientStatsStruct {
283 SilcUInt32 starttime; /* SILC server start time */
284 SilcUInt32 uptime; /* SILC server uptime*/
285 SilcUInt32 my_clients; /* Number of clients in the server */
286 SilcUInt32 my_channels; /* Number of channel in the server */
287 SilcUInt32 my_server_ops; /* Number of server operators in the server */
288 SilcUInt32 my_router_ops; /* Number of router operators in the router */
289 SilcUInt32 cell_clients; /* Number of clients in the cell */
290 SilcUInt32 cell_channels; /* Number of channels in the cell */
291 SilcUInt32 cell_servers; /* Number of server in the cell */
292 SilcUInt32 clients; /* All clients in SILC network */
293 SilcUInt32 channels; /* All channels in SILC network */
294 SilcUInt32 servers; /* All servers in SILC network */
295 SilcUInt32 routers; /* All routers in SILC network */
296 SilcUInt32 server_ops; /* All server operators in SILC network */
297 SilcUInt32 router_ops; /* All router operators in SILC network */
301 /****d* silcclient/SilcClientAPI/SilcKeyAgreementStatus
305 * typedef enum { ... } SilcKeyAgreementStatus;
309 * Key agreement status types indicating the status of the key
310 * agreement protocol. These types are returned to the application
311 * in the SilcKeyAgreementCallback callback function.
316 SILC_KEY_AGREEMENT_OK, /* Everything is Ok */
317 SILC_KEY_AGREEMENT_ERROR, /* Unknown error occurred */
318 SILC_KEY_AGREEMENT_FAILURE, /* The protocol failed */
319 SILC_KEY_AGREEMENT_TIMEOUT, /* The protocol timeout */
320 SILC_KEY_AGREEMENT_ABORTED, /* The protocol aborted */
321 SILC_KEY_AGREEMENT_ALREADY_STARTED, /* Already started */
322 SILC_KEY_AGREEMENT_SELF_DENIED, /* Negotiationg with itself denied */
323 SILC_KEY_AGREEMENT_NO_MEMORY, /* System out of memory */
324 } SilcKeyAgreementStatus;
327 /****f* silcclient/SilcClientAPI/SilcKeyAgreementCallback
331 * typedef void (*SilcKeyAgreementCallback)(SilcClient client,
332 * SilcClientConnection conn,
333 * SilcClientEntry client_entry,
334 * SilcKeyAgreementStatus status,
335 * SilcSKEKeyMaterial *key,
340 * Key agreement callback that is called after the key agreement protocol
341 * has been performed. This is called also if error occurred during the
342 * key agreement protocol. The `key' is the allocated key material and
343 * the caller is responsible of freeing it. The `key' is NULL if error
344 * has occurred. The application can freely use the `key' to whatever
345 * purpose it needs. See lib/silcske/silcske.h for the definition of
346 * the SilcSKEKeyMaterial structure.
349 typedef void (*SilcKeyAgreementCallback)(SilcClient client,
350 SilcClientConnection conn,
351 SilcClientEntry client_entry,
352 SilcKeyAgreementStatus status,
353 SilcSKEKeyMaterial key,
356 /****s* silcclient/SilcClientAPI/SilcPrivateMessageKeys
360 * typedef struct { ... } SilcPrivateMessageKeys;
364 * Structure to hold the list of private message keys. The list of these
365 * structures is returned by the silc_client_list_private_message_keys
370 typedef struct SilcPrivateMessageKeysStruct {
371 SilcClientEntry client_entry; /* The remote client entry */
372 char *cipher; /* The cipher name */
373 unsigned char *key; /* The original key, If the appliation
374 provided it. This is NULL if
375 the SKE key material was used. */
376 SilcUInt32 key_len; /* The key length */
377 } *SilcPrivateMessageKeys;
380 /****s* silcclient/SilcClientAPI/SilcChannelPrivateKey
384 * typedef struct SilcChannelPrivateKeyStruct { ... }
385 * *SilcChannelPrivateKey;
389 * Structure to hold one channel private key. The array of this structure
390 * is returned by silc_client_list_channel_private_keys function.
394 struct SilcChannelPrivateKeyStruct {
395 char *name; /* Application given name */
396 SilcCipher send_key; /* The cipher and key */
397 SilcCipher receive_key; /* The cipher and key */
398 SilcHmac hmac; /* The HMAC and hmac key */
402 /****f* silcclient/SilcClientAPI/SilcAskPassphrase
406 * typedef void (*SilcAskPassphrase)(const unsigned char *passphrase,
407 * SilcUInt32 passphrase_len,
412 * Ask passphrase callback. This is called by the application when the
413 * library calls `ask_passphrase' client operation. The callback delivers
414 * the passphrase to the library. The passphrases in SILC protocol
415 * MUST be in UTF-8 encoding, therefore the `passphrase' SHOULD be UTF-8
416 * encoded, and if it is not then library will attempt to encode it.
419 typedef void (*SilcAskPassphrase)(const unsigned char *passphrase,
420 SilcUInt32 passphrase_len,
423 /****f* silcclient/SilcClientAPI/SilcVerifyPublicKey
427 * typedef void (*SilcVerifyPublicKey)(SilcBool success, void *context);
431 * Public key (or certificate) verification callback. This is called
432 * by the application to indicate that the public key verification was
433 * either success or failure.
436 typedef void (*SilcVerifyPublicKey)(SilcBool success, void *context);
438 /****f* silcclient/SilcClientAPI/SilcGetAuthMeth
442 * typedef void (*SilcGetAuthMeth)(SilcAuthMethod auth_meth,
443 * const void *auth, SilcUInt32 auth_len,
448 * Authentication data resolving callback. This is called by the
449 * application to return the resolved authentication data. The client
450 * library has called the get_auth_method client operation and given
451 * this function pointer as argument. The `auth_meth' is the selected
452 * authentication method. The `auth_data' and the `auth_data_len'
453 * are the resolved authentication data. The `context' is the libary's
454 * context sent to the get_auth_method client operation.
456 * If the `auth_method' is SILC_AUTH_PASSWORD then `auth' and `auth_len'
457 * is the passphrase and its length. If it is SILC_AUTH_PUBLIC_KEY the
458 * `auth' must be NULL. The library will use the private key given as
459 * argument to silc_client_connect_to_server, silc_client_connect_to_client
460 * or silc_client_key_exchange. If it is SILC_AUTH_NONE, both `auth' and
461 * `auth_len' are ignored.
464 typedef void (*SilcGetAuthMeth)(SilcAuthMethod auth_meth,
465 const void *auth, SilcUInt32 auth_len,
468 /****d* silcclient/SilcClientAPI/SilcClientMessageType
472 * typedef enum { ... } SilcClientMessageType;
476 * Different message types for `say' client operation. The application
477 * may filter the message sent by the library according this type.
482 SILC_CLIENT_MESSAGE_INFO, /* Informational */
483 SILC_CLIENT_MESSAGE_WARNING, /* Warning */
484 SILC_CLIENT_MESSAGE_ERROR, /* Error */
485 SILC_CLIENT_MESSAGE_COMMAND_ERROR, /* Error during command */
486 SILC_CLIENT_MESSAGE_AUDIT, /* Auditable */
487 } SilcClientMessageType;
490 /****s* silcclient/SilcClientAPI/SilcClientOperations
494 * typedef struct { ... } SilcClientOperations;
498 * SILC Client Operations. These must be implemented by the application.
499 * The Client library may call any of these routines at any time. The
500 * routines are used to deliver certain information to the application
501 * or from the application to the client library.
505 typedef struct SilcClientOperationsStruct {
506 /* Message sent to the application by library. `conn' associates the
507 message to a specific connection. `conn', however, may be NULL.
508 The `type' indicates the type of the message sent by the library.
509 The application can for example filter the message according the
510 type. The variable argument list is arguments to the formatted
511 message that `msg' may be. */
512 void (*say)(SilcClient client, SilcClientConnection conn,
513 SilcClientMessageType type, char *msg, ...);
515 /* Message for a channel. The `sender' is the sender of the message
516 The `channel' is the channel. The `message' is the message. Note
517 that `message' maybe NULL. The `flags' indicates message flags
518 and it is used to determine how the message can be interpreted
519 (like it may tell the message is multimedia message). The `payload'
520 may be used to retrieve all the details of the message. */
521 void (*channel_message)(SilcClient client, SilcClientConnection conn,
522 SilcClientEntry sender, SilcChannelEntry channel,
523 SilcMessagePayload payload,
524 SilcChannelPrivateKey key, SilcMessageFlags flags,
525 const unsigned char *message,
526 SilcUInt32 message_len);
528 /* Private message to the client. The `sender' is the sender of the
529 message. The message is `message'and maybe NULL. The `flags'
530 indicates message flags and it is used to determine how the message
531 can be interpreted (like it may tell the message is multimedia
532 message). The `payload' may be used to retrieve all the details of
534 void (*private_message)(SilcClient client, SilcClientConnection conn,
535 SilcClientEntry sender, SilcMessagePayload payload,
536 SilcMessageFlags flags, const unsigned char *message,
537 SilcUInt32 message_len);
539 /* Notify message to the client. The arguments are notify `type' specific.
540 See separate documentation in the Toolkit Reference Manual for the notify
542 void (*notify)(SilcClient client, SilcClientConnection conn,
543 SilcNotifyType type, ...);
545 /* Command handler. This function is called always after application has
546 called a command. It will be called to indicate that the command
547 was processed. It will also be called if error occurs while processing
548 the command. The `success' indicates whether the command was sent
549 or if error occurred. The `status' indicates the actual error.
550 The `argc' and `argv' are the command line arguments sent to the
551 command by application. Note that, this is not reply to the command
552 from server, this is merely and indication to application that the
553 command was processed. */
554 void (*command)(SilcClient client, SilcClientConnection conn,
555 SilcBool success, SilcCommand command, SilcStatus status,
556 SilcUInt32 argc, unsigned char **argv);
558 /* Command reply handler. Delivers a reply to command that was sent
559 earlier. The `conn' is the associated client connection. The `command'
560 indicates the command reply type. If the `status' other than
561 SILC_STATUS_OK an error occurred. In this case the `error' will indicate
562 the error. It is possible to receive list of command replies and list
563 of errors. In this case the `status' will indicate it is an list entry
564 (the `status' is SILC_STATUS_LIST_START, SILC_STATUS_LIST_ITEM and/or
565 SILC_STATUS_LIST_END).
567 The arguments received in `ap' are command specific. See a separate
568 documentation in the Toolkit Reference Manual for the command reply
570 void (*command_reply)(SilcClient client, SilcClientConnection conn,
571 SilcCommand command, SilcStatus status,
572 SilcStatus error, va_list ap);
574 /* Find authentication method and authentication data by hostname and
575 port. The hostname may be IP address as well. The `auth_method' is
576 the authentication method the remote connection requires. It is
577 however possible that remote accepts also some other authentication
578 method. Application should use the method that may have been
579 configured for this connection. If none has been configured it should
580 use the required `auth_method'. If the `auth_method' is
581 SILC_AUTH_NONE, server does not require any authentication or the
582 required authentication method is not known. The `completion'
583 callback must be called to deliver the chosen authentication method
584 and data. The `conn' may be NULL. */
585 void (*get_auth_method)(SilcClient client, SilcClientConnection conn,
586 char *hostname, SilcUInt16 port,
587 SilcAuthMethod auth_method,
588 SilcGetAuthMeth completion, void *context);
590 /* Called to verify received public key. The `conn_type' indicates which
591 entity (server or client) has sent the public key. If user decides to
592 trust the key the application may save the key as trusted public key for
593 later use. The `completion' must be called after the public key has
595 void (*verify_public_key)(SilcClient client, SilcClientConnection conn,
596 SilcConnectionType conn_type,
597 SilcPublicKey public_key,
598 SilcVerifyPublicKey completion, void *context);
600 /* Ask from end user a passphrase or a password. The passphrase is
601 returned to the library by calling the `completion' callback with
602 the `context'. The returned passphrase SHOULD be in UTF-8 encoded,
603 if not then the library will attempt to encode. */
604 void (*ask_passphrase)(SilcClient client, SilcClientConnection conn,
605 SilcAskPassphrase completion, void *context);
607 /* Called to indicate that incoming key agreement request has been
608 received. If the application wants to perform key agreement it may
609 call silc_client_perform_key_agreement to initiate key agreement or
610 silc_client_send_key_agreement to provide connection point to the
611 remote client in case the `hostname' is NULL. If key agreement is
612 not desired this request can be ignored. The `protocol' is either
613 value 0 for TCP or value 1 for UDP. */
614 void (*key_agreement)(SilcClient client, SilcClientConnection conn,
615 SilcClientEntry client_entry,
616 const char *hostname, SilcUInt16 protocol,
619 /* Notifies application that file transfer protocol session is being
620 requested by the remote client indicated by the `client_entry' from
621 the `hostname' and `port'. The `session_id' is the file transfer
622 session and it can be used to either accept or reject the file
623 transfer request, by calling the silc_client_file_receive or
624 silc_client_file_close, respectively. */
625 void (*ftp)(SilcClient client, SilcClientConnection conn,
626 SilcClientEntry client_entry, SilcUInt32 session_id,
627 const char *hostname, SilcUInt16 port);
628 } SilcClientOperations;
631 /****s* silcclient/SilcClientAPI/SilcClientParams
635 * typedef struct { ... } SilcClientParams;
639 * Client parameters. This can be filled with proper values and
640 * given as argument to the silc_client_alloc function. The structure
641 * hold various parameters which affects the function of the client.
645 typedef struct SilcClientParamsStruct {
646 /* If this boolean is set to TRUE then the client library will use
647 threads. Any of the callback functions in the SilcClientOperations
648 and other callbacks may be called at any time in a thread. The
649 application may need to employ appropriate concurrency control
650 in the callbacks to protect application specific data. */
653 /* Nickname format string. This can be used to order the client library
654 to save the nicknames in the library in a certain format. Since
655 nicknames are not unique in SILC it is possible to have multiple same
656 nicknames. Using this format string it is possible to order the library
657 to separate the multiple same nicknames from each other. If this is
658 empty then default format is used which is the default nickname
659 without anything else. The string MUST be NULL terminated.
661 Following format types are available:
663 %n nickname - the real nickname returned by the server (mandatory)
664 %a number - ascending number in case there are several
665 same nicknames (fe. nick#2 and nick#3)
666 %h hostname - the stripped hostname of the client
667 %H full hostname - the full hostname of the client
669 Example format strings: "%n#%a" (fe. nick#2, nick#3)
670 "%n#%h%a" (fe. nick#host, nick#host2)
671 "%a!%n#%h" (fe. nick#host, 2!nick#host)
673 Note that there must always be some separator characters around '%n'
674 format. It is not possible to put format characters before or after
675 '%n' without separators (such ash '#'). Also note that the separator
676 character should be a character that cannot be part of normal nickname.
677 Note that, using '@' as a separator is not recommended as the nickname
678 string may contain it to separate a server name from the nickname (eg.
679 nickname@silcnet.org).
681 char nickname_format[32];
683 /* If this is set to TRUE then the `nickname_format' is employed to all
684 saved nicknames even if there are no multiple same nicknames in the
685 cache. By default this is FALSE, which means that the `nickname_format'
686 is employed only if the library will receive a nickname that is
687 already saved in the cache. It is recommended to leave this to FALSE
689 SilcBool nickname_force_format;
691 /* If this is set to TRUE then all nickname strings returned by the library
692 and stored by the library are in the format of 'nickname@server', eg.
693 nickname@silcnet.org. If this is FALSE then the server name of the
694 nickname is available only from the SilcClientEntry structure. When this
695 is TRUE the server name is still parsed to SilcClientEntry. */
696 SilcBool full_nicknames;
698 /* If this is set to TRUE then all channel name strings returned by the
699 library and stored by the library are in the format of 'channel@server',
700 eg. silc@silcnet.org. If this is FALSE then the server name of the
701 channel is available only from the SilcChannelEntry structure. When this
702 is TRUE the server name is still parsed to SilcChannelEntry. Note that,
703 not all SILC server versions return such channel name strings. */
704 SilcBool full_channel_names;
706 /* If this is set to TRUE, the silcclient library will not initialize
707 or uninitialize the SILC Crypto Toolkit. The application will have
708 to do that itself by calling silc_crypto_init and silc_crypto_uninit. */
709 SilcBool dont_register_crypto_library;
715 /* Initialization functions (client.c) */
717 /****f* silcclient/SilcClientAPI/silc_client_alloc
721 * SilcClient silc_client_alloc(SilcClientOperations *ops,
722 * SilcClientParams *params,
724 * const char *silc_version);
728 * Allocates new client object. This has to be done before client may
729 * work. After calling this one must call silc_client_init to initialize
730 * the client. The `application' is application specific user data pointer
731 * and caller must free it. The `silc_version' is the application version
732 * that will be used to compare against remote host's (usually a server)
733 * version string. The `application' context is accessible by the
734 * application by client->application, client being SilcClient.
737 SilcClient silc_client_alloc(SilcClientOperations *ops,
738 SilcClientParams *params,
740 const char *version_string);
742 /****f* silcclient/SilcClientAPI/silc_client_free
746 * void silc_client_free(SilcClient client);
750 * Frees client object and its internals. The execution of the client
751 * should be stopped with silc_client_stop function before calling
755 void silc_client_free(SilcClient client);
757 /****f* silcclient/SilcClientAPI/silc_client_init
761 * SilcBool silc_client_init(SilcClient client, const char *username,
762 * const char *hostname, const char *realname,
763 * SilcClientRunning running, void *context);
767 * Initializes the client. This makes all the necessary steps to make
768 * the client ready to be run. One must call silc_client_run to run the
769 * client. Returns FALSE if error occurred, TRUE otherwise.
771 * The `username' and `hostname' strings must be given and they must be
772 * UTF-8 encoded. The `username' is the client's username in the
773 * operating system, `hostname' is the client's host name and the
774 * `realname' is the user's real name.
776 * The `running' callback with `context' is called after the client is
777 * running after silc_client_run or silc_client_run_one has been called.
778 * Application may start using the Client library API after that. Setting
779 * the callback is optional, but highly recommended.
782 SilcBool silc_client_init(SilcClient client, const char *username,
783 const char *hostname, const char *realname,
784 SilcClientRunning running, void *context);
786 /****f* silcclient/SilcClientAPI/silc_client_run
790 * void silc_client_run(SilcClient client);
794 * Runs the client. This starts the scheduler from the utility library.
795 * When this functions returns the execution of the application is over.
796 * The client must be initialized before calling this.
799 void silc_client_run(SilcClient client);
801 /****f* silcclient/SilcClientAPI/silc_client_run_one
805 * void silc_client_run_one(SilcClient client);
809 * Runs the client and returns immeadiately. This function is used when
810 * the SILC Client object indicated by the `client' is run under some
811 * other scheduler, or event loop or main loop. On GUI applications,
812 * for example this may be desired to used to run the client under the
813 * GUI application's main loop. Typically the GUI application would
814 * register an idle task that calls this function multiple times in
815 * a second to quickly process the SILC specific data.
818 void silc_client_run_one(SilcClient client);
820 /****f* silcclient/SilcClientAPI/silc_client_stop
824 * void silc_client_stop(SilcClient client, SilcClientStopped stopped,
829 * Stops the client. This is called to stop the client and thus to stop
830 * the program. The client context must be freed with the silc_client_free
831 * function. All connections that exist in this client must be closed
832 * before calling this function. Connections can be closed by calling
833 * silc_client_close_connection.
835 * The `stopped' will be called once the client and all connections have
836 * finished. The client may be freed after that. Note that the `stopped'
837 * won't be called before all connections have finished. Setting the
838 * callback is optional.
841 void silc_client_stop(SilcClient client, SilcClientStopped stopped,
844 /* Connecting functions */
846 /****s* silcclient/SilcClientAPI/SilcClientConnectionParams
850 * typedef struct { ... } SilcClientConnectionParams;
854 * Client connection parameters. This can be filled by the application
855 * and given as argument to silc_client_connect_to_server,
856 * silc_client_connect_to_client, silc_client_key_exchange or
857 * silc_client_send_key_agreement.
861 typedef struct SilcClientConnectionParamsStruct {
862 /* If this is provided the user's nickname in the network will be the
863 string given here. If it is given, it must be UTF-8 encoded. If this
864 string is not given, the user's username by default is used as nickname.
865 The nickname may later be changed by using NICK command. The maximum
866 length for the nickname string is 128 bytes. */
869 /* If this key repository pointer is non-NULL then public key received in
870 the key exchange protocol will be verified from this repository. If
871 this is not provided then the `verify_public_key' client operation will
872 be called back to application. If the boolean `verify_notfound' is set
873 to TRUE then the `verify_public_key' client operation will be called
874 in case the public key is not found in `repository'. Only public keys
875 added with at least SILC_SKR_USAGE_KEY_AGREEMENT in the repository will
876 be checked, other keys will be ignored. */
878 SilcBool verify_notfound;
880 /* Authentication data. Application may set here the authentication data
881 and authentication method to be used in connecting. If `auth_set'
882 boolean is TRUE then authentication data is provided by application.
883 If the authentication method is public key authentication then the key
884 pair given as argument when connecting will be used and `auth' field
885 is NULL. If it is passphrase authentication, it can be provided in
886 `auth' and `auth_len' fields. If `auth_set' is FALSE
887 the `get_auth_method' client operation will be called to get the
888 authentication method and data from application. */
890 SilcAuthMethod auth_method;
894 /* If this boolean is set to TRUE then the connection will use UDP instead
895 of TCP. If UDP is set then also the next `local_ip' and `local_port'
899 /* The `local_ip' specifies the local IP address used with the connection.
900 It must be non-NULL if `udp' boolean is TRUE. If the `local_port' is
901 non-zero it will be used as local port with UDP connection. The remote
902 host will also send packets to the specified address and port. If the
903 `bind_ip' is non-NULL a listener is bound to that address instead of
909 /* If this boolean is set to TRUE then the key exchange is done with
910 perfect forward secrecy. */
913 /* If this boolean is set to TRUE then connection authentication protocol
914 is not performed during connecting. Only key exchange protocol is
915 performed. This usually must be set to TRUE when connecting to another
916 client, but must be FALSE with server connections. */
917 SilcBool no_authentication;
919 /* The SILC session detachment data that was returned in the `command_reply'
920 client operation for SILC_COMMAND_DETACH command. If this is provided
921 here the client library will attempt to resume the session in the network.
922 After the connection is created and the session has been resumed the
923 client will receive SILC_COMMAND_NICK command_reply for the client's
924 nickname in the network and SILC_COMMAND_JOIN command reply for all the
925 channels that the client has joined in the network. It may also receive
926 SILC_COMMAND_UMODE command reply to set user's mode on the network. */
927 unsigned char *detach_data;
928 SilcUInt32 detach_data_len;
930 /* Connection timeout. If non-zero, the connection will timeout unless
931 the SILC connection is completed in the specified amount of time. */
932 SilcUInt32 timeout_secs;
934 /* Rekey timeout in seconds. The client will perform rekey in this
935 time interval. If set to zero, the default value will be used
936 (3600 seconds, 1 hour). */
937 SilcUInt32 rekey_secs;
939 /* If this is set to TRUE then the client will ignore all incoming
940 Requested Attributes queries and does not reply anything back. This
941 usually leads into situation where server does not anymore send
942 the queries after seeing that client does not reply anything back.
943 If your application does not support Requested Attributes or you do
944 not want to use them set this to TRUE. See SilcAttribute and
945 silc_client_attribute_add for more information on attributes. */
946 SilcBool ignore_requested_attributes;
948 } SilcClientConnectionParams;
951 /****f* silcclient/SilcClientAPI/silc_client_connect_to_server
956 * silc_client_connect_to_server(SilcClient client,
957 * SilcClientConnectionParams *params,
958 * SilcPublicKey public_key,
959 * SilcPrivateKey private_key,
960 * char *remote_host, int port,
961 * SilcClientConnectCallback callback,
966 * Connects to remote server `remote_host' at port `port'. This function
967 * can be used to create connection to remote SILC server and start
968 * SILC session in the SILC network. The `params' may be provided
969 * to provide various connection parameters. The `public_key' and the
970 * `private_key' is your identity used in this connection. When
971 * authentication method is based on digital signatures, this key pair
972 * will be used. The `callback' with `context' will be called after the
973 * connection has been created. It will also be called later when remote
976 * If application wishes to create the network connection itself, use
977 * the silc_client_key_exchange after creating the connection to start
978 * key exchange and authentication with the server.
980 * Returns SilcAsyncOperation which can be used to cancel the connecting,
981 * or NULL on error. Note that the returned pointer becomes invalid
982 * after the `callback' is called.
986 silc_client_connect_to_server(SilcClient client,
987 SilcClientConnectionParams *params,
988 SilcPublicKey public_key,
989 SilcPrivateKey private_key,
990 char *remote_host, int port,
991 SilcClientConnectCallback callback,
994 /****f* silcclient/SilcClientAPI/silc_client_connect_to_client
999 * silc_client_connect_to_client(SilcClient client,
1000 * SilcClientConnectionParams *params,
1001 * SilcPublicKey public_key,
1002 * SilcPrivateKey private_key,
1003 * char *remote_host, int port,
1004 * SilcClientConnectCallback callback,
1009 * Connects to remote client `remote_host' at port `port'. This function
1010 * can be used to create peer-to-peer connection to another SILC client,
1011 * for example, for direct conferencing, or file transfer or for other
1012 * purposes. The `params' may be provided to provide various connection
1013 * parameters. The `public_key' and the `private_key' is your identity
1014 * used in this connection. The `callback' with `context' will be called
1015 * after the connection has been created. It will also be called later
1016 * when remote host disconnects.
1018 * If application wishes to create the network connection itself, use
1019 * the silc_client_key_exchange after creating the connection to start
1020 * key exchange with the client.
1022 * Returns SilcAsyncOperation which can be used to cancel the connecting,
1023 * or NULL on error. Note that the returned pointer becomes invalid
1024 * after the `callback' is called.
1028 silc_client_connect_to_client(SilcClient client,
1029 SilcClientConnectionParams *params,
1030 SilcPublicKey public_key,
1031 SilcPrivateKey private_key,
1032 char *remote_host, int port,
1033 SilcClientConnectCallback callback,
1036 /****f* silcclient/SilcClientAPI/silc_client_key_exchange
1040 * SilcAsyncOperation
1041 * silc_client_key_exchange(SilcClient client,
1042 * SilcClientConnectionParams *params,
1043 * SilcPublicKey public_key,
1044 * SilcPrivateKey private_key,
1045 * SilcStream stream,
1046 * SilcConnectionType conn_type,
1047 * SilcClientConnectCallback callback,
1052 * Starts key exchange protocol and authentication protocol in the
1053 * connection indicated by `stream'. This function can be be used to
1054 * start SILC session with remote host (usually server) when the caller
1055 * has itself created the connection, instead of calling the function
1056 * silc_client_connect_to_server or silc_client_connect_to_client. If
1057 * one of those functions was used this function must not be called as
1058 * in that case the key exchange is performed automatically.
1060 * Use this function only if you have created the connection by yourself.
1061 * After creating the connection the socket must be wrapped into a
1062 * socket stream. See silcsocketstream.h for more information. Note that
1063 * the `stream' must have valid remote IP address (and optionally also
1064 * hostname) and port set.
1066 * The `params' may be provided to provide various connection parameters.
1067 * The `public_key' and the `private_key' is your identity used in this
1068 * session. The `callback' with `context' will be called after the session
1069 * has been set up. It will also be called later when remote host
1070 * disconnects. The `conn_type' is the type of session this is going to
1071 * be. If the remote is SILC server it is SILC_CONN_SERVER or if it is
1072 * SILC client it is SILC_CONN_CLIENT.
1074 * Returns SilcAsyncOperation which can be used to cancel the connecting,
1075 * or NULL on error. Note that the returned pointer becomes invalid
1076 * after the `callback' is called.
1082 * // Create remote connection stream. Resolve hostname and IP also.
1083 * sock = create_connection(remote_host, port);
1084 * silc_socket_tcp_stream_create(sock, TRUE, FALSE, schedule,
1085 * stream_create_cb, app);
1087 * // Stream callback delivers our new SilcStream context
1088 * void stream_create_cb(SilcResult status, SilcStream stream,
1092 * if (status != SILC_OK)
1095 * // Start key exchange
1096 * silc_client_key_exchange(client, NULL, public_key, private_key,
1097 * stream, SILC_CONN_SERVER, connection_cb, app);
1103 silc_client_key_exchange(SilcClient client,
1104 SilcClientConnectionParams *params,
1105 SilcPublicKey public_key,
1106 SilcPrivateKey private_key,
1108 SilcConnectionType conn_type,
1109 SilcClientConnectCallback callback,
1112 /****f* silcclient/SilcClientAPI/silc_client_close_connection
1116 * void silc_client_close_connection(SilcClient client,
1117 * SilcClientConnection conn);
1121 * Closes the remote connection `conn'. The `conn' will become invalid
1122 * after this call. Usually this function is called only when explicitly
1123 * closing connection for example in case of error, or when the remote
1124 * connection was created by the application or when the remote is client
1125 * connection. Server connections are usually closed by sending QUIT
1126 * command to the server. However, this call may also be used.
1129 void silc_client_close_connection(SilcClient client,
1130 SilcClientConnection conn);
1132 /* Message sending functions */
1134 /****f* silcclient/SilcClientAPI/silc_client_send_channel_message
1138 * SilcBool silc_client_send_channel_message(SilcClient client,
1139 * SilcClientConnection conn,
1140 * SilcChannelEntry channel,
1141 * SilcChannelPrivateKey key,
1142 * SilcMessageFlags flags,
1144 * unsigned char *data,
1145 * SilcUInt32 data_len);
1149 * Sends encrypted message to the `channel'. The plaintext message is
1150 * the `data' of `data_len' bytes in length.
1152 * If `key' is provided then that private channel message key is used to
1153 * encrypt the message. If it is not provided and the `channel' does not
1154 * have SILC_CHANNEL_MODE_PRIVKEY set, the curent channel key is used
1155 * instead. If the mode is set but `key' is NULL the key that was added
1156 * first as private channel message key will be used.
1158 * If the `flags' includes SILC_MESSAGE_FLAG_SIGNED the message will be
1159 * digitally signed with the SILC key pair associated with the `conn'.
1160 * In this case the `hash' pointer must be provided as well.
1162 * Returns TRUE if the message was sent, and FALSE if error occurred or
1163 * the sending is not allowed due to channel modes (like sending is
1164 * blocked). This function is thread safe and private messages can be
1165 * sent from multiple threads.
1168 SilcBool silc_client_send_channel_message(SilcClient client,
1169 SilcClientConnection conn,
1170 SilcChannelEntry channel,
1171 SilcChannelPrivateKey key,
1172 SilcMessageFlags flags,
1174 unsigned char *data,
1175 SilcUInt32 data_len);
1177 /****f* silcclient/SilcClientAPI/silc_client_send_private_message
1181 * SilcBool silc_client_send_private_message(SilcClient client,
1182 * SilcClientConnection conn,
1183 * SilcClientEntry client_entry,
1184 * SilcMessageFlags flags,
1186 * unsigned char *data,
1187 * SilcUInt32 data_len);
1191 * Sends private message to remote client. If private message key has
1192 * not been set with this client then the message will be encrypted using
1193 * the session keys used in `conn' connection. If the `flags' includes
1194 * SILC_MESSAGE_FLAG_SIGNED the message will be digitally signed with the
1195 * SILC key pair associated with `conn'. In this case the caller must also
1196 * provide the `hash' pointer.
1198 * Returns TRUE if the message was sent, and FALSE if error occurred.
1199 * This function is thread safe and private messages can be sent from
1203 SilcBool silc_client_send_private_message(SilcClient client,
1204 SilcClientConnection conn,
1205 SilcClientEntry client_entry,
1206 SilcMessageFlags flags,
1208 unsigned char *data,
1209 SilcUInt32 data_len);
1211 /****f* silcclient/SilcClientAPI/silc_client_private_message_wait_init
1216 * silc_client_private_message_wait_init(SilcClient client,
1217 * SilcClientConnection conn,
1218 * SilcClientEntry client_entry);
1222 * Initializes private message waiting functionality for the client
1223 * indicated by `client_entry'. Once this is called private message
1224 * from remote connection indicated by `conn' for `client_entry' may
1225 * be waiter for, for example in a thread. The function
1226 * silc_client_private_message_wait is used to block the current thread
1227 * until a private message is received from a specified client entry.
1228 * Return FALSE in case an internal error occurred.
1231 SilcBool silc_client_private_message_wait_init(SilcClient client,
1232 SilcClientConnection conn,
1233 SilcClientEntry client_entry);
1235 /****f* silcclient/SilcClientAPI/silc_client_private_message_wait_uninit
1240 * silc_client_private_message_wait_uninit(SilcClient client,
1241 * SilcClientConnection conn,
1242 * SilcClientEntry client_entry);
1246 * Unintializes private message waiting for client indicated by
1247 * `client_entry'. After this call private message cannot be waited
1248 * anymore and silc_client_private_message_wait will return with FALSE
1252 void silc_client_private_message_wait_uninit(SilcClient client,
1253 SilcClientConnection conn,
1254 SilcClientEntry client_entry);
1256 /****f* silcclient/SilcClientAPI/silc_client_private_message_wait
1261 * silc_client_private_message_wait(SilcClient client,
1262 * SilcClientConnection conn,
1263 * SilcClientEntry client_entry,
1264 * SilcMessagePayload *payload);
1268 * Blocks current thread or process until a private message has been
1269 * received from the remote client indicated by `client_entry'. Before
1270 * private messages can be waited the silc_client_private_message_wait_init
1271 * must be called. This function can be used from a thread to wait for
1272 * private message from the specified client. Multiple threads can be
1273 * created to wait messages from multiple clients. Any other private
1274 * message received from the connection indicated by `conn' will be
1275 * forwarded to the normal `private_message' client operation callback.
1276 * The private messages from `client_entry' will not be delivered to the
1277 * `private_message' client operation callback.
1279 * Returns TRUE and the received private message into `payload'. The caller
1280 * must free the returned SilcMessagePayload. If this function returns
1281 * FALSE the private messages cannot be waited anymore. This happens
1282 * when some other thread calls silc_client_private_message_wait_uninit.
1283 * This returns FALSE also if silc_client_private_message_wait_init has
1287 SilcBool silc_client_private_message_wait(SilcClient client,
1288 SilcClientConnection conn,
1289 SilcClientEntry client_entry,
1290 SilcMessagePayload *payload);
1292 /****f* silcclient/SilcClientAPI/silc_client_on_channel
1296 * SilcChannelUser silc_client_on_channel(SilcChannelEntry channel,
1297 * SilcClientEntry client_entry);
1301 * Returns the SilcChannelUser entry if the `client_entry' is joined on the
1302 * channel indicated by the `channel'. NULL if client is not joined on
1306 SilcChannelUser silc_client_on_channel(SilcChannelEntry channel,
1307 SilcClientEntry client_entry);
1310 /* Command management */
1312 /****f* silcclient/SilcClientAPI/silc_client_command_call
1316 * SilcUInt16 silc_client_command_call(SilcClient client,
1317 * SilcClientConnection conn,
1318 * const char *command_line, ...);
1322 * Calls and executes the command indicated by the `command_name'.
1323 * The `command_line' is a string which includes the command's name and
1324 * its arguments separated with whitespaces (' '). If `command_line'
1325 * is non-NULL then all variable arguments are ignored by default.
1327 * If `command_line' is NULL, then the variable arguments define the
1328 * command's name and its arguments. The first variable argument must
1329 * be the command name. The variable argument list must be terminated
1332 * Returns command identifier for this sent command. It can be used
1333 * to additionally attach to the command reply using the function
1334 * silc_client_command_pending, if needed. Returns 0 on error.
1336 * The `command' client operation callback will be called when the
1337 * command is executed to indicate whether or not the command executed
1340 * The `command_reply' client operation callbak will be called when reply
1341 * is received from the server to the command. Application may also use
1342 * the silc_client_command_pending to attach to the command reply.
1343 * The command identifier for silc_client_command_pending function after
1344 * this function call is conn->cmd_ident, which application may use.
1348 * silc_client_command_call(client, conn, NULL, "PING", "silc.silcnet.org",
1350 * silc_client_command_call(client, conn, "PING silc.silcnet.org");
1354 * This command executes the commands implemented inside the client
1355 * library. These commands are designed for command line applications,
1356 * but GUI application may call them too if needed. Alternatively
1357 * application may override the library and use silc_client_command_send
1361 SilcUInt16 silc_client_command_call(SilcClient client,
1362 SilcClientConnection conn,
1363 const char *command_line, ...);
1365 /****f* silcclient/SilcClientAPI/SilcClientCommandReply
1369 * typedef SilcBool (*SilcClientCommandReply)(SilcClient client,
1370 * SilcClientConnection conn,
1371 * SilcCommand command,
1372 * SilcStatus status,
1379 * The command reply callback function given as argument to functions
1380 * silc_client_command_send and silc_client_command_pending. This is
1381 * called to deliver the command replies to the caller. Each command
1382 * reply received from the server to the `command' will be delivered
1383 * separately to the caller by calling this callback. The `status' will
1384 * indicate whether there is only one reply or multiple replies. The
1385 * `error' will indicate if an error occurred. The `ap' will include
1386 * command reply arguments. They are the same arguments as for
1387 * `command_reply' client operation callback in SilcClientOperations.
1389 * If `status' is SILC_STATUS_OK only one reply was received and error
1390 * did not occur. If it is SILC_STATUS_LIST_START, SILC_STATUS_LIST_ITEM
1391 * or SILC_STATUS_LIST_END, there are will be two or more replies. The
1392 * first reply is SILC_STATUS_LIST_START and last one SILC_STATUS_LIST_END.
1394 * If FALSE is returned in this function this callback will not be called
1395 * again for `command' even if there are more comand replies. By returning
1396 * FALSE the caller may stop the command reply handling when needed.
1399 typedef SilcBool (*SilcClientCommandReply)(SilcClient client,
1400 SilcClientConnection conn,
1401 SilcCommand command,
1407 /****f* silcclient/SilcClientAPI/silc_client_command_send
1411 * SilcUInt16 silc_client_command_send(SilcClient client,
1412 * SilcClientConnection conn,
1413 * SilcCommand command,
1414 * SilcClientCommandReply reply,
1415 * void *reply_context,
1416 * SilcUInt32 argc, ...);
1420 * Generic function to send any command. The arguments must be given
1421 * already encoded into correct format and in correct order. If application
1422 * wants to perform the commands by itself, it can do so and send the data
1423 * directly to the server using this function. If application is using
1424 * the silc_client_command_call, this function is usually not used.
1425 * Programmer should get familiar with the SILC protocol commands
1426 * specification when using this function, as the arguments needs to
1427 * be encoded as specified in the protocol.
1429 * The variable arguments are a set of { type, data, data_length },
1430 * and the `argc' is the number of these sets.
1432 * The `reply' callback must be provided, and it is called when the
1433 * command reply is received from the server. Note that, when using this
1434 * function the default `command_reply' client operation callback will not
1435 * be called when reply is received.
1437 * Returns command identifier for this sent command. It can be used
1438 * to additionally attach to the command reply using the function
1439 * silc_client_command_pending, if needed. Returns 0 on error.
1443 * silc_client_command_send(client, conn, SILC_COMMAND_WHOIS,
1444 * my_whois_command_reply, cmd_ctx,
1445 * 1, 1, nickname, strlen(nickname));
1448 SilcUInt16 silc_client_command_send(SilcClient client,
1449 SilcClientConnection conn,
1450 SilcCommand command,
1451 SilcClientCommandReply reply,
1452 void *reply_context,
1453 SilcUInt32 argc, ...);
1455 /****f* silcclient/SilcClientAPI/silc_client_command_pending
1459 * void silc_client_command_pending(SilcClientConnection conn,
1460 * SilcCommand command,
1461 * SilcUInt16 cmd_ident,
1462 * SilcClientCommandReply reply,
1467 * This function can be used to add pending command callback to be
1468 * called when an command reply is received to an earlier sent command.
1469 * The `command' is the command that must be received in order for
1470 * the pending command callback indicated by `callback' to be called.
1472 * The `cmd_ident' is a command identifier which was set for the earlier
1473 * sent command. The command reply will include the same identifier
1474 * and pending command callback will be called when the reply is
1475 * received with the same command identifier. It is possible to
1476 * add multiple pending command callbacks for same command and for
1479 * Application may use this function to add its own command reply
1480 * handlers if it wishes not to use the standard `command_reply'
1483 * Note also that the application is notified about the received command
1484 * reply through the `command_reply' client operation before calling
1485 * the `callback` pending command callback. That is the normal
1486 * command reply handling, and is called regardless whether pending
1487 * command callbacks are used or not.
1491 * SilcUInt16 cmd_ident;
1492 * cmd_ident = silc_client_command_call(client, conn,
1493 * "PING silc.silcnet.org");
1494 * silc_client_command_pending(conn, SILC_COMMAND_PING, cmd_ident,
1495 * my_ping_handler, my_ping_context);
1498 SilcBool silc_client_command_pending(SilcClientConnection conn,
1499 SilcCommand command,
1500 SilcUInt16 cmd_ident,
1501 SilcClientCommandReply reply,
1505 /* Private Message key management */
1507 /****f* silcclient/SilcClientAPI/silc_client_add_private_message_key
1512 * silc_client_add_private_message_key(SilcClient client,
1513 * SilcClientConnection conn,
1514 * SilcClientEntry client_entry,
1515 * const char *cipher,
1517 * unsigned char *key,
1518 * SilcUInt32 key_len);
1522 * Adds a static private message key to the client library. The key
1523 * will be used to encrypt all private message between the client and
1524 * the remote client indicated by the `client_entry'. The `key' can
1525 * be for example a pre-shared-key, passphrase or similar shared secret
1526 * string. The `cipher' and `hmac' MAY be provided but SHOULD be NULL
1527 * to assure that the requirements of the SILC protocol are met. The
1528 * API, however, allows to allocate any cipher and HMAC.
1530 * If the private message key is added to client without first receiving
1531 * a request for it from the remote `client_entry' this function will
1532 * send the request to `client_entry'. Note that, the actual key is
1533 * not sent to the network.
1535 * It is not necessary to set key for normal private message usage. If the
1536 * key is not set then the private messages are encrypted using normal
1537 * session keys. Setting the private key, however, increases security.
1539 * Returns FALSE if the key is already set for the `client_entry', TRUE
1543 SilcBool silc_client_add_private_message_key(SilcClient client,
1544 SilcClientConnection conn,
1545 SilcClientEntry client_entry,
1549 SilcUInt32 key_len);
1551 /****f* silcclient/SilcClientAPI/silc_client_add_private_message_key_ske
1556 * silc_client_add_private_message_key_ske(SilcClient client,
1557 * SilcClientConnection conn,
1558 * SilcClientEntry client_entry,
1559 * const char *cipher,
1561 * SilcSKEKeyMaterial key);
1565 * Same as silc_client_add_private_message_key but takes the key material
1566 * from the SKE key material structure. This structure is received if
1567 * the application uses the silc_client_send_key_agreement to negotiate
1568 * the key material. The `cipher' and `hmac' SHOULD be provided as it is
1569 * negotiated also in the SKE protocol.
1572 SilcBool silc_client_add_private_message_key_ske(SilcClient client,
1573 SilcClientConnection conn,
1574 SilcClientEntry client_entry,
1577 SilcSKEKeyMaterial key);
1579 /****f* silcclient/SilcClientAPI/silc_client_del_private_message_key
1584 * silc_client_del_private_message_key(SilcClient client,
1585 * SilcClientConnection conn,
1586 * SilcClientEntry client_entry);
1590 * Removes the private message from the library. The key won't be used
1591 * after this to protect the private messages with the remote `client_entry'
1592 * client. Returns FALSE on error, TRUE otherwise.
1595 SilcBool silc_client_del_private_message_key(SilcClient client,
1596 SilcClientConnection conn,
1597 SilcClientEntry client_entry);
1599 /****f* silcclient/SilcClientAPI/silc_client_list_private_message_keys
1603 * SilcPrivateMessageKeys
1604 * silc_client_list_private_message_keys(SilcClient client,
1605 * SilcClientConnection conn,
1606 * SilcUInt32 *key_count);
1610 * Returns array of set private message keys associated to the connection
1611 * `conn'. Returns allocated SilcPrivateMessageKeys array and the array
1612 * count to the `key_count' argument. The array must be freed by the caller
1613 * by calling the silc_client_free_private_message_keys function. Note:
1614 * the keys returned in the array is in raw format. It might not be desired
1615 * to show the keys as is. The application might choose not to show the keys
1616 * at all or to show the fingerprints of the keys.
1619 SilcPrivateMessageKeys
1620 silc_client_list_private_message_keys(SilcClient client,
1621 SilcClientConnection conn,
1622 SilcUInt32 *key_count);
1624 /****f* silcclient/SilcClientAPI/silc_client_free_private_message_keys
1628 * void silc_client_free_private_message_keys(SilcPrivateMessageKeys keys,
1629 * SilcUInt32 key_count);
1633 * Frees the SilcPrivateMessageKeys array returned by the function
1634 * silc_client_list_private_message_keys.
1637 void silc_client_free_private_message_keys(SilcPrivateMessageKeys keys,
1638 SilcUInt32 key_count);
1640 /****f* silcclient/SilcClientAPI/silc_client_private_message_key_is_set
1645 * silc_client_private_message_key_is_set(SilcClient client,
1646 * SilcClientConnection conn,
1647 * SilcClientEntry client_entry);
1651 * Returns TRUE if the private message key has been set for the client
1652 * entry indicated by `client_entry'.
1656 silc_client_private_message_key_is_set(SilcClient client,
1657 SilcClientConnection conn,
1658 SilcClientEntry client_entry);
1661 /* Channel private key management */
1663 /****f* silcclient/SilcClientAPI/silc_client_add_channel_private_key
1668 * silc_client_add_channel_private_key(SilcClient client,
1669 * SilcClientConnection conn,
1670 * SilcChannelEntry channel,
1674 * unsigned char *key,
1675 * SilcUInt32 key_len,
1676 * SilcChannelPrivateKey *ret_key);
1680 * Adds private key for channel. When channel has private key then the
1681 * messages are encrypted using that key. All clients on the channel
1682 * must also know the key in order to decrypt the messages. However,
1683 * it is possible to have several private keys per one channel. In this
1684 * case only some of the clients on the channel may know the one key
1685 * and only some the other key. The `name' can be application given
1686 * name for the key. This returns the created key to the 'ret_key'
1687 * pointer if it is non-NULL;
1689 * If `cipher' and/or `hmac' is NULL then default values will be used
1690 * (aes-256-cbc for cipher and hmac-sha1-96 for hmac).
1692 * The private key for channel is optional. If it is not set then the
1693 * channel messages are encrypted using the channel key generated by the
1694 * server. However, setting the private key (or keys) for the channel
1695 * significantly adds security. If more than one key is set the library
1696 * will automatically try all keys at the message decryption phase. Note:
1697 * setting many keys slows down the decryption phase as all keys has to
1698 * be tried in order to find the correct decryption key. However, setting
1699 * a few keys does not have big impact to the decryption performace.
1703 * NOTE: This is entirely local setting. The key set using this function
1704 * is not sent to the network at any phase.
1706 * NOTE: If the key material was originated by the SKE protocol (using
1707 * silc_client_send_key_agreement) then the `key' MUST be the
1708 * key->send_enc_key as this is dictated by the SILC protocol. However,
1709 * currently it is not expected that the SKE key material would be used
1710 * as channel private key. However, this API allows it.
1713 SilcBool silc_client_add_channel_private_key(SilcClient client,
1714 SilcClientConnection conn,
1715 SilcChannelEntry channel,
1721 SilcChannelPrivateKey *ret_key);
1723 /****f* silcclient/SilcClientAPI/silc_client_del_channel_private_keys
1727 * SilcBool silc_client_del_channel_private_keys(SilcClient client,
1728 * SilcClientConnection conn,
1729 * SilcChannelEntry channel);
1733 * Removes all private keys from the `channel'. The old channel key is used
1734 * after calling this to protect the channel messages. Returns FALSE on
1735 * on error, TRUE otherwise.
1738 SilcBool silc_client_del_channel_private_keys(SilcClient client,
1739 SilcClientConnection conn,
1740 SilcChannelEntry channel);
1742 /****f* silcclient/SilcClientAPI/silc_client_del_channel_private_key
1746 * SilcBool silc_client_del_channel_private_key(SilcClient client,
1747 * SilcClientConnection conn,
1748 * SilcChannelEntry channel,
1749 * SilcChannelPrivateKey key);
1753 * Removes and frees private key `key' from the channel `channel'.
1754 * The `key' is retrieved by calling the function
1755 * silc_client_list_channel_private_keys. The key is not used after
1756 * this. If the key was last private key then the old channel key is
1757 * used hereafter to protect the channel messages. This returns FALSE
1758 * on error, TRUE otherwise.
1761 SilcBool silc_client_del_channel_private_key(SilcClient client,
1762 SilcClientConnection conn,
1763 SilcChannelEntry channel,
1764 SilcChannelPrivateKey key);
1766 /****f* silcclient/SilcClientAPI/silc_client_list_channel_private_keys
1771 * silc_client_list_channel_private_keys(SilcClient client,
1772 * SilcClientConnection conn,
1773 * SilcChannelEntry channel);
1777 * Returns list of private keys associated to the `channel'. The caller
1778 * must free the returned list with silc_dlist_uninit. The pointers in
1779 * the list may be used to delete the specific key by giving the pointer
1780 * as argument to the function silc_client_del_channel_private_key. Each
1781 * entry in the list is SilcChannelPrivateKey.
1784 SilcDList silc_client_list_channel_private_keys(SilcClient client,
1785 SilcClientConnection conn,
1786 SilcChannelEntry channel);
1788 /****f* silcclient/SilcClientAPI/silc_client_current_channel_private_key
1792 * void silc_client_current_channel_private_key(SilcClient client,
1793 * SilcClientConnection conn,
1794 * SilcChannelEntry channel,
1795 * SilcChannelPrivateKey key);
1799 * Sets the `key' to be used as current channel private key on the
1800 * `channel'. Packet sent after calling this function will be secured
1804 void silc_client_current_channel_private_key(SilcClient client,
1805 SilcClientConnection conn,
1806 SilcChannelEntry channel,
1807 SilcChannelPrivateKey key);
1810 /* Key Agreement routines */
1812 /****f* silcclient/SilcClientAPI/silc_client_send_key_agreement
1816 * void silc_client_send_key_agreement(SilcClient client,
1817 * SilcClientConnection conn,
1818 * SilcClientEntry client_entry,
1819 * SilcClientConnectionParams *params,
1820 * SilcPublicKey public_key,
1821 * SilcPrivateKey private_key,
1822 * SilcKeyAgreementCallback completion,
1827 * Sends key agreement request to the remote client indicated by the
1830 * If `params' is non-NULL and it has the `local_ip' and `local_port' set
1831 * the caller will provide the connection endpoint for the key agreement
1832 * connection. The `bind_ip' can be used to bind to that IP instead of
1833 * `local_ip'. If the `udp' is set to TRUE the connection will be UDP
1834 * instead of TCP. Caller may also set the `repository', `verify_notfound'
1835 * and `timeout_secs' fields in `params'. Other fields are ignored.
1836 * If `params' is NULL, then the `client_entry' is expected to provide
1837 * the connection endpoint for us. It is recommended the `timeout_secs'
1838 * is specified in case the remote client does not reply anything to
1841 * The `public_key' and `private_key' is our identity in the key agreement.
1843 * In case we do not provide the connection endpoint, we will receive
1844 * the `key_agreement' client operation when the remote send its own
1845 * key agreement request packet. We may then there start the key
1846 * agreement with silc_client_perform_key_agreement. If we provided the
1847 * the connection endpoint, the client operation will not be called.
1849 * There can be only one active key agreement for `client_entry'. Old
1850 * key agreement may be aborted by calling silc_client_abort_key_agreement.
1854 * // Send key agreement request (we don't provide connection endpoint)
1855 * silc_client_send_key_agreement(client, conn, remote_client,
1856 * NULL, public_key, private_key,
1857 * my_keyagr_completion, my_context);
1859 * // Another example where we provide connection endpoint (TCP).
1860 * SilcClientConnectionParams params;
1861 * memset(¶ms, 0, sizeof(params));
1862 * params.local_ip = local_ip;
1863 * params.local_port = local_port;
1864 * params.timeout_secs = 60;
1865 * silc_client_send_key_agreement(client, conn, remote_client,
1866 * ¶ms, public_key, private_key,
1867 * my_keyagr_completion, my_context);
1870 void silc_client_send_key_agreement(SilcClient client,
1871 SilcClientConnection conn,
1872 SilcClientEntry client_entry,
1873 SilcClientConnectionParams *params,
1874 SilcPublicKey public_key,
1875 SilcPrivateKey private_key,
1876 SilcKeyAgreementCallback completion,
1879 /****f* silcclient/SilcClientAPI/silc_client_perform_key_agreement
1884 * silc_client_perform_key_agreement(SilcClient client,
1885 * SilcClientConnection conn,
1886 * SilcClientEntry client_entry,
1887 * SilcClientConnectionParams *params,
1888 * SilcPublicKey public_key,
1889 * SilcPrivateKey private_key,
1890 * char *hostname, int port,
1891 * SilcKeyAgreementCallback completion,
1896 * Performs the key agreement protocol. Application may use this to
1897 * initiate the key agreement protocol. Usually this is called after
1898 * receiving the `key_agreement' client operation.
1900 * The `hostname' is the remote hostname (or IP address) and the `port'
1901 * is the remote port. The `completion' callback with the `context' will
1902 * be called after the key agreement protocol.
1904 * The `params' is connection parameters and it may be used to define
1905 * the key agreement connection related parameters. It may be NULL.
1908 void silc_client_perform_key_agreement(SilcClient client,
1909 SilcClientConnection conn,
1910 SilcClientEntry client_entry,
1911 SilcClientConnectionParams *params,
1912 SilcPublicKey public_key,
1913 SilcPrivateKey private_key,
1914 char *hostname, int port,
1915 SilcKeyAgreementCallback completion,
1918 /****f* silcclient/SilcClientAPI/silc_client_perform_key_agreement_stream
1923 * silc_client_perform_key_agreement_stream(
1924 * SilcClient client,
1925 * SilcClientConnection conn,
1926 * SilcClientEntry client_entry,
1927 * SilcClientConnectionParams *params,
1928 * SilcPublicKey public_key,
1929 * SilcPrivateKey private_key,
1930 * SilcStream stream,
1931 * SilcKeyAgreementCallback completion,
1936 * Same as silc_client_perform_key_agreement but the caller has created
1937 * the connection to remote client. The `stream' is the created
1942 silc_client_perform_key_agreement_stream(SilcClient client,
1943 SilcClientConnection conn,
1944 SilcClientEntry client_entry,
1945 SilcClientConnectionParams *params,
1946 SilcPublicKey public_key,
1947 SilcPrivateKey private_key,
1949 SilcKeyAgreementCallback completion,
1952 /****f* silcclient/SilcClientAPI/silc_client_abort_key_agreement
1956 * void silc_client_abort_key_agreement(SilcClient client,
1957 * SilcClientConnection conn,
1958 * SilcClientEntry client_entry);
1962 * This function can be called to unbind the hostname and the port for
1963 * the key agreement protocol. However, this function has effect only
1964 * before the key agreement protocol has been performed. After it has
1965 * been performed the library will automatically unbind the port. The
1966 * `client_entry' is the client to which we sent the key agreement
1967 * request. The key agreement completion callback will be called
1968 * with SILC_KEY_AGREEMENT_ABORTED status.
1971 void silc_client_abort_key_agreement(SilcClient client,
1972 SilcClientConnection conn,
1973 SilcClientEntry client_entry);
1976 /* Misc functions */
1978 /****f* silcclient/SilcClientAPI/silc_client_set_away_message
1982 * SilcBool silc_client_set_away_message(SilcClient client,
1983 * SilcClientConnection conn,
1988 * Sets away `message'. The away message may be set when the client's
1989 * mode is changed to SILC_UMODE_GONE and the client whishes to reply
1990 * to anyone who sends private message. The `message' will be sent
1991 * automatically back to the the client who send private message. If
1992 * away message is already set this replaces the old message with the
1993 * new one. If `message' is NULL the old away message is removed.
1994 * The sender may freely free the memory of the `message'. Returns
1998 SilcBool silc_client_set_away_message(SilcClient client,
1999 SilcClientConnection conn,
2002 /****d* silcclient/SilcClientAPI/SilcClientMonitorStatus
2006 * typedef enum { ... } SilcClientMonitorStatus;
2010 * File transmission session status types. These will indicate
2011 * the status of the file transmission session.
2013 * The SILC_CLIENT_FILE_MONITOR_KEY_AGREEMENT is called when session
2014 * is key exchange phase.
2016 * The SILC_CLIENT_FILE_MONITOR_SEND is called when data is being sent
2019 * The SILC_CLIENT_FILE_MONITOR_RECEIVE is called when data is being
2020 * recieved from remote client.
2022 * The SILC_CLIENT_FILE_MONITOR_CLOSED will be called when the user
2023 * issues silc_client_file_close. If needed, it may be ignored in the
2026 * The SILC_CLIENT_FILE_MONITOR_DISCONNECT will be called if remote
2027 * disconnects the session connection. The silc_client_file_close must
2028 * be called when this status is received. The session is over when
2031 * The SILC_CLIENLT_FILE_MONITOR_ERROR is called in case some error
2032 * occured. The SilcClientFileError will indicate more detailed error
2033 * condition. The silc_client_file_close must be called when this status
2034 * is received. The session is over when this is received.
2039 SILC_CLIENT_FILE_MONITOR_KEY_AGREEMENT, /* In key agreemenet phase */
2040 SILC_CLIENT_FILE_MONITOR_SEND, /* Sending file */
2041 SILC_CLIENT_FILE_MONITOR_RECEIVE, /* Receiving file */
2042 SILC_CLIENT_FILE_MONITOR_GET, /* Unsupported */
2043 SILC_CLIENT_FILE_MONITOR_PUT, /* Unsupported */
2044 SILC_CLIENT_FILE_MONITOR_CLOSED, /* Session closed */
2045 SILC_CLIENT_FILE_MONITOR_DISCONNECT, /* Session disconnected */
2046 SILC_CLIENT_FILE_MONITOR_ERROR, /* Error during session */
2047 } SilcClientMonitorStatus;
2050 /****d* silcclient/SilcClientAPI/SilcClientFileError
2054 * typedef enum { ... } SilcClientFileError;
2058 * File transmission error types. These types are returned by
2059 * some of the file transmission functions, and by the monitor
2060 * callback to indicate error.
2065 SILC_CLIENT_FILE_OK,
2066 SILC_CLIENT_FILE_ERROR, /* Generic error */
2067 SILC_CLIENT_FILE_UNKNOWN_SESSION, /* Unknown session ID */
2068 SILC_CLIENT_FILE_ALREADY_STARTED, /* Session already started */
2069 SILC_CLIENT_FILE_NO_SUCH_FILE, /* No such file */
2070 SILC_CLIENT_FILE_PERMISSION_DENIED, /* Permission denied */
2071 SILC_CLIENT_FILE_KEY_AGREEMENT_FAILED, /* Key exchange failed */
2072 SILC_CLIENT_FILE_CONNECT_FAILED, /* Error during connecting */
2073 SILC_CLIENT_FILE_TIMEOUT, /* Connecting timedout */
2074 SILC_CLIENT_FILE_NO_MEMORY, /* System out of memory */
2075 } SilcClientFileError;
2078 /****f* silcclient/SilcClientAPI/SilcClientFileMonitor
2082 * typedef void (*SilcClientFileMonitor)(SilcClient client,
2083 * SilcClientConnection conn,
2084 * SilcClientMonitorStatus status,
2085 * SilcClientFileError error,
2086 * SilcUInt64 offset,
2087 * SilcUInt64 filesize,
2088 * SilcClientEntry client_entry,
2089 * SilcUInt32 session_id,
2090 * const char *filepath,
2095 * Monitor callback that is called during the file transmission to
2096 * monitor the transmission process. The `status' indicates the current
2097 * monitoring process. The `error' will indicate the error type
2098 * if `status' is SILC_CLIENT_FILE_MONITOR_ERROR. The `offset' is the
2099 * currently transmitted amount of total `filesize'. The `client_entry'
2100 * indicates the remote client, and the transmission session ID is the
2101 * `session_id'. The filename being transmitted is indicated by the
2102 * `filepath'. The `conn' is NULL if the connection to remote client
2103 * does not exist yet.
2106 typedef void (*SilcClientFileMonitor)(SilcClient client,
2107 SilcClientConnection conn,
2108 SilcClientMonitorStatus status,
2109 SilcClientFileError error,
2111 SilcUInt64 filesize,
2112 SilcClientEntry client_entry,
2113 SilcUInt32 session_id,
2114 const char *filepath,
2117 /****f* silcclient/SilcClientAPI/SilcClientFileName
2121 * typedef void (*SilcClientFileName)(const char *filepath,
2126 * Completion callback for the SilcClientFileAskName callback function.
2127 * Application calls this to deliver the filepath and filename where
2128 * the downloaded file is to be saved.
2131 typedef void (*SilcClientFileName)(const char *filepath,
2134 /****f* silcclient/SilcClientAPI/SilcClientFileAskName
2138 * typedef void (*SilcClientFileAskName)(SilcClient client,
2139 * SilcClientConnection conn,
2140 * SilcUInt32 session_id,
2141 * const char *remote_filename,
2142 * SilcClientFileName completion,
2143 * void *completion_context,
2148 * File name asking callback that is called if it is given to the
2149 * silc_client_file_receive and the path given to that as argument was
2150 * NULL. The library calls this to ask the filename and filepath to
2151 * where the file is to be saved. The 'remote_filename' is the file
2152 * that is being downloaded. Application must call the 'completion'
2153 * with 'completion_context' to continue with the file downloading.
2154 * It is not mandatory to provide this to the silc_client_file_receive.
2157 typedef void (*SilcClientFileAskName)(SilcClient client,
2158 SilcClientConnection conn,
2159 SilcUInt32 session_id,
2160 const char *remote_filename,
2161 SilcClientFileName completion,
2162 void *completion_context,
2165 /****f* silcclient/SilcClientAPI/silc_client_file_send
2169 * SilcClientFileError
2170 * silc_client_file_send(SilcClient client,
2171 * SilcClientConnection conn,
2172 * SilcClientEntry client_entry,
2173 * SilcClientConnectionParams *params,
2174 * SilcPublicKey public_key,
2175 * SilcPrivateKey private_key,
2176 * SilcClientFileMonitor monitor,
2177 * void *monitor_context,
2178 * const char *filepath,
2179 * SilcUInt32 *session_id);
2183 * Sends a file indicated by the `filepath' to the remote client
2184 * indicated by the `client_entry'. This will negotiate a secret key
2185 * with the remote client before actually starting the transmission of
2186 * the file. The `monitor' callback will be called to monitor the
2187 * transmission of the file.
2189 * This returns a file session ID for the file transmission to the
2190 * `session_id' pointer. It can be used to close the session (and
2191 * abort the file transmission) by calling the silc_client_file_close
2192 * function. The session ID is also returned in the `monitor' callback.
2194 * If `params' is non-NULL and it has the `local_ip' and `local_port' set
2195 * the caller will provide the connection endpoint for the key agreement
2196 * connection. The `bind_ip' can be used to bind to that IP instead of
2197 * `local_ip'. Caller may also set the `repository', `verify_notfound'
2198 * and `timeout_secs' fields in `params'. Other fields are ignored.
2199 * If `params' is NULL, then the `client_entry' is expected to provide
2200 * the connection endpoint for us. It is recommended the `timeout_secs'
2201 * is specified in case the remote client does not reply anything to
2204 * The `public_key' and `private_key' is our identity in the key agreement.
2206 * If error will occur during the file transfer process the error status
2207 * will be returned in the monitor callback. In this case the application
2208 * must call silc_client_file_close to close the session.
2212 silc_client_file_send(SilcClient client,
2213 SilcClientConnection conn,
2214 SilcClientEntry client_entry,
2215 SilcClientConnectionParams *params,
2216 SilcPublicKey public_key,
2217 SilcPrivateKey private_key,
2218 SilcClientFileMonitor monitor,
2219 void *monitor_context,
2220 const char *filepath,
2221 SilcUInt32 *session_id);
2223 /****f* silcclient/SilcClientAPI/silc_client_file_receive
2227 * SilcClientFileError
2228 * silc_client_file_receive(SilcClient client,
2229 * SilcClientConnection conn,
2230 * SilcClientConnectionParams *params,
2231 * SilcPublicKey public_key,
2232 * SilcPrivateKey private_key,
2233 * SilcClientFileMonitor monitor,
2234 * void *monitor_context,
2236 * SilcUInt32 session_id,
2237 * SilcClientFileAskName ask_name,
2238 * void *ask_name_context);
2242 * Receives a file from a client indicated by the `client_entry'. The
2243 * `session_id' indicates the file transmission session and it has been
2244 * received in the `ftp' client operation callback. This will actually
2245 * perform the key agreement protocol with the remote client before
2246 * actually starting the file transmission. The `monitor' callback
2247 * will be called to monitor the transmission. If `path' is non-NULL
2248 * the file will be saved into that directory. If NULL the file is
2249 * saved in the current working directory, unless the 'ask_name'
2250 * callback is non-NULL. In this case the callback is called to ask
2251 * the path and filename from application.
2253 * The `params' is the connection related parameters. If the remote client
2254 * provided connection point the `params' will be used when creating
2255 * connection to the remote client. If remote client did not provide
2256 * connection point the `params' is used to provide connection point
2257 * locally for the remote client. See silc_client_file_send for more
2258 * information on providing connection point for remote client.
2260 * The `public_key' and `private_key' is our identity in the key agreement.
2262 * If error will occur during the file transfer process the error status
2263 * will be returned in the monitor callback. In this case the application
2264 * must call silc_client_file_close to close the session.
2268 silc_client_file_receive(SilcClient client,
2269 SilcClientConnection conn,
2270 SilcClientConnectionParams *params,
2271 SilcPublicKey public_key,
2272 SilcPrivateKey private_key,
2273 SilcClientFileMonitor monitor,
2274 void *monitor_context,
2276 SilcUInt32 session_id,
2277 SilcClientFileAskName ask_name,
2278 void *ask_name_context);
2280 /****f* silcclient/SilcClientAPI/silc_client_file_close
2284 * SilcClientFileError silc_client_file_close(SilcClient client,
2285 * SilcClientConnection conn,
2286 * SilcUInt32 session_id);
2290 * Closes file transmission session indicated by the `session_id'.
2291 * If file transmission is being conducted it will be aborted
2292 * automatically. This function is also used to close the session
2293 * after successful file transmission. This function can be used
2294 * also to reject incoming file transmission request. If the
2295 * session was already started and the monitor callback was set
2296 * the monitor callback will be called with the monitor status
2297 * SILC_CLIENT_FILE_MONITOR_CLOSED.
2300 SilcClientFileError silc_client_file_close(SilcClient client,
2301 SilcClientConnection conn,
2302 SilcUInt32 session_id);
2304 /****f* silcclient/SilcClientAPI/silc_client_attribute_add
2308 * SilcAttributePayload
2309 * silc_client_attribute_add(SilcClient client,
2310 * SilcClientConnection conn,
2311 * SilcAttribute attribute,
2313 * SilcUInt32 object_size);
2317 * Add new Requsted Attribute for WHOIS command to the client library.
2318 * The `attribute' object indicated by `object' is added and allocated
2319 * SilcAttributePayload is returned. The `object' must be of correct
2320 * type and of correct size. See the SilcAttribute for object types
2321 * for different attributes. You may also get all added attributes
2322 * from the client with silc_client_attributes_get function.
2324 * Requested Attributes are different personal information about the
2325 * user, status information and other information which other users
2326 * may query with WHOIS command. Application may set these so that
2327 * if someone sends WHOIS query these attributes will be replied back
2328 * to the sender. The library always puts the public key to the
2329 * Requested Attributes, but if application wishes to add additional
2330 * public keys (or certificates) it can be done with this interface.
2331 * Library also always computes digital signature of the attributes
2332 * automatically, so application does not need to do that.
2335 SilcAttributePayload silc_client_attribute_add(SilcClient client,
2336 SilcClientConnection conn,
2337 SilcAttribute attribute,
2339 SilcUInt32 object_size);
2341 /****f* silcclient/SilcClientAPI/silc_client_attribute_del
2345 * SilcBool silc_client_attribute_del(SilcClient client,
2346 * SilcClientConnection conn,
2347 * SilcAttribute attribute,
2348 * SilcAttributePayload attr);
2352 * Delete a Requested Attribute from the client. If the `attribute'
2353 * is non-zero then all attributes of that type are deleted and the
2354 * `attr' is ignored. If `attr' is non-NULL then that specific
2355 * attribute is deleted and `attribute' is ignored.
2357 * You may get all added attributes with the function
2358 * silc_client_attributes_get and to get the SilcAttributePayload.
2359 * This function Returns TRUE if the attribute was found and deleted.
2362 SilcBool silc_client_attribute_del(SilcClient client,
2363 SilcClientConnection conn,
2364 SilcAttribute attribute,
2365 SilcAttributePayload attr);
2367 /****f* silcclient/SilcClientAPI/silc_client_attributes_get
2371 * const SilcHashTable
2372 * silc_client_attributes_get(SilcClient client,
2373 * SilcClientConnection conn);
2377 * Returns pointer to the SilcHashTable which includes all the added
2378 * Requested Attributes. The caller must not free the hash table.
2379 * The caller may use SilcHashTableList and silc_hash_table_list to
2380 * traverse the table. Each entry in the hash table is one added
2381 * SilcAttributePayload. It is possible to delete a attribute
2382 * payload while traversing the table.
2385 SilcHashTable silc_client_attributes_get(SilcClient client,
2386 SilcClientConnection conn);
2388 /****f* silcclient/SilcClientAPI/silc_client_attributes_request
2392 * SilcBuffer silc_client_attributes_request(SilcAttribute attribute, ...);
2396 * Constructs a Requested Attributes buffer. If the `attribute' is zero (0)
2397 * then all attributes are requested. Alternatively, `attribute' and
2398 * all variable arguments can each be requested attribute. In this case
2399 * the last must be set to zero (0) to complete the variable list of
2400 * requested attributes. See SilcAttribute for all attributes.
2401 * You can give the returned buffer as argument to for example
2402 * silc_client_get_client_by_id_resolve function.
2406 * Request all attributes
2407 * buffer = silc_client_attributes_request(0);
2409 * Request only the following attributes
2410 * buffer = silc_client_attributes_request(SILC_ATTRIBUTE_USER_INFO,
2411 * SILC_ATTRIBUTE_SERVICE,
2412 * SILC_ATTRIBUTE_MOOD, 0);
2415 SilcBuffer silc_client_attributes_request(SilcAttribute attribute, ...);
2417 /****f* silcclient/SilcClientAPI/silc_client_nickname_format
2422 * silc_client_nickname_format(SilcClient client,
2423 * SilcClientConnection conn,
2424 * SilcClientEntry client_entry,
2425 * SilcBool priority);
2429 * Formats the nickname of `client_entry' according to the nickname
2430 * formatting rules set in SilcClientParams. If the `priority' is TRUE
2431 * then the `client_entry' will always get the unformatted nickname.
2432 * If FALSE and there are more than one same nicknames in the client
2433 * the nickname will be formatted.
2435 * This returns NULL on error. Otherwise, the client entry that was
2436 * formatted is returned. If `priority' is FALSE this always returns
2437 * the `client_entry'. If it is TRUE, this may return the client entry
2438 * that was formatted after giving the `client_entry' the unformatted
2441 * Usually application does not need to call this function, as the library
2442 * automatically formats nicknames. However, if application wants to
2443 * for example force the `client_entry' to always have the unformatted
2444 * nickname it may call this function to do so.
2447 SilcClientEntry silc_client_nickname_format(SilcClient client,
2448 SilcClientConnection conn,
2449 SilcClientEntry client_entry,
2452 /****f* silcclient/SilcClientAPI/silc_client_nickname_parse
2456 * SilcBool silc_client_nickname_parse(SilcClient client,
2457 * SilcClientConnection conn,
2463 * Parses the `nickname' according to the format string given in the
2464 * SilcClientParams. Returns the parsed nickname into the `ret_nick'.
2465 * The caller must free the returned pointer. Returns FALSE if error
2466 * occurred during parsing. Returns TRUE if the nickname was parsed,
2467 * it was not formatted or if the format string has not been specified
2468 * in SilcClientParams.
2471 SilcBool silc_client_nickname_parse(SilcClient client,
2472 SilcClientConnection conn,
2480 #endif /* SILCCLIENT_H */