5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 2000 - 2002 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 operations are defined first. These are callback functions that
26 * the application MUST implement since the library may call the functions
27 * at any time. At the end of file is the API for the application that
28 * it can use from the library. This is the only file that the application
29 * may include from the SIlC Client Library.
31 * o SILC Client Operations
33 * These functions must be implemented by the application calling the SILC
34 * client library. The client library can call these functions at any time.
36 * To use this structure: define a static SilcClientOperations variable,
37 * fill it and pass its pointer to silc_client_alloc function.
39 * o SILC Client Library API
41 * This is the API that is published by the SILC Client Library for the
42 * applications. These functions are implemented in the SILC Client Library.
43 * Application may freely call these functions from the library.
45 * Please, refer to the README file in this directory for the directions
46 * of how to use the SILC Client Library.
59 /* General definitions */
61 /****s* silcclient/SilcClientAPI/SilcClient
65 * typedef struct SilcClientStruct { ... } *SilcClient
69 * This is the actual SILC Client structure which represents one
70 * SILC Client. It is allocated with the silc_client_alloc function
71 * and given as argument to all SILC Client Library functions. It
72 * is initialized with silc_client_init function, and freed with
73 * silc_client_free function.
77 struct SilcClientStruct {
79 * The following fields are set by application
81 char *nickname; /* Nickname, MAY be set by application */
82 char *username; /* Username, MUST be set by application */
83 char *hostname; /* hostname, MUST be set by application */
84 char *realname; /* Real name, MUST be set be application */
86 SilcPublicKey public_key; /* Public key of user, set by application */
87 SilcPrivateKey private_key; /* Private key of user, set by application */
88 SilcPKCS pkcs; /* PKCS allocated by application */
91 * The following fields are set by the library
94 /* Scheduler, set by library. Application may use this pointer. */
95 SilcSchedule schedule;
97 /* Random Number Generator. Application should use this as its primary
98 random number generator. */
101 /* Application specific user data pointer. Client library does not
102 touch this. This the context sent as argument to silc_client_alloc.
103 Application can use it freely. */
106 /* Generic hash context for application usage */
110 /* Internal data for client library. Application cannot access this
112 SilcClientInternal internal;
116 /****s* silcclient/SilcClientAPI/SilcClientConnection
120 * typedef struct SilcClientConnectionStruct { ... }
121 * *SilcClientConnection
125 * This structure represents a connection. When connection is created
126 * to server this is context is returned to the application in the
127 * "connected" client operation. It includes all the important
128 * data for the session, such as nickname, local and remote IDs, and
133 struct SilcClientConnectionStruct {
137 char *nickname; /* Current nickname */
138 SilcClientEntry local_entry; /* Own Client Entry */
139 SilcClientID *local_id; /* Current Client ID */
140 unsigned char *local_id_data; /* Current Client ID decoded */
141 SilcUInt32 local_id_data_len;
146 char *remote_host; /* Remote host name */
147 int remote_port; /* Remote port */
148 SilcServerID *remote_id; /* Remote Server ID */
149 unsigned char *remote_id_data; /* Remote Server ID decoded */
150 SilcUInt32 remote_id_data_len;
156 /* Current command identifier for a command that was sent last.
157 Application may get the value from this variable to find out the
158 command identifier for last command. */
159 SilcUInt16 cmd_ident;
161 /* User data context. Library does not touch this. Application may
162 freely set and use this pointer for its needs. */
165 /* Pointer back to the SilcClient. Application may use this. */
168 /* Current channel. Application may use and set this pointer if needed. */
169 SilcChannelEntry current_channel;
171 /* Socket connection object for this connection. Application may
172 use this if needed. The sock->user_data is back pointer to this
174 SilcSocketConnection sock;
176 /* Internal data for client library. Application cannot access this
178 SilcClientConnectionInternal internal;
182 /****s* silcclient/SilcClientAPI/SilcClientEntry
186 * typedef struct SilcClientEntryStruct { ... } *SilcClientEntry
190 * This structure represents a client or a user in the SILC network.
191 * The local user has this structure also and it can be accessed from
192 * SilcClientConnection structure. All other users in the SILC network
193 * that are accessed using the Client Library routines will have their
194 * own SilcClientEntry structure. For example, when finding users by
195 * their nickname the Client Library returns this structure back to
200 struct SilcClientEntryStruct {
201 /* General information */
202 char *nickname; /* nickname */
203 char *username; /* username */
204 char *hostname; /* hostname */
205 char *server; /* SILC server name */
206 char *realname; /* Realname (userinfo) */
208 /* Mode, ID and other information */
209 SilcUInt32 mode; /* User mode in SILC */
210 SilcClientID *id; /* The Client ID */
211 SilcDList attrs; /* Requested Attributes (maybe NULL) */
212 unsigned char *fingerprint; /* Fingerprint of client's public key */
213 SilcUInt32 fingerprint_len; /* Length of the fingerprint */
215 /* Private message keys */
216 SilcCipher send_key; /* Private message key for sending */
217 SilcCipher receive_key; /* Private message key for receiving */
218 SilcHmac hmac_send; /* Private mesage key HMAC for sending */
219 SilcHmac hmac_receive; /* Private mesage key HMAC for receiving */
220 unsigned char *key; /* Set only if application provided the
221 key material. NULL if the library
222 generated the key. */
223 SilcUInt32 key_len; /* Key length */
224 SilcClientKeyAgreement ke; /* Current key agreement context or NULL */
226 /* SilcClientEntry status information */
227 SilcEntryStatus status; /* Status mask */
228 SilcHashTable channels; /* All channels client has joined */
229 SilcUInt16 resolve_cmd_ident; /* Command identifier when resolving */
230 bool generated; /* TRUE if library generated `key' */
231 bool valid; /* FALSE if this entry is not valid */
235 /****s* silcclient/SilcClientAPI/SilcChannelEntry
239 * typedef struct SilcChannelEntryStruct { ... } *SilcChannelEntry
243 * This structure represents a channel in the SILC network. All
244 * channels that the client are aware of or have joined in will be
245 * represented as SilcChannelEntry. The structure includes information
250 struct SilcChannelEntryStruct {
251 /* General information */
252 char *channel_name; /* Channel name */
253 SilcChannelID *id; /* Channel ID */
254 SilcUInt32 mode; /* Channel mode */
256 /* All clients that has joined this channel */
257 SilcHashTable user_list;
260 SilcCipher channel_key; /* The channel key */
261 unsigned char *key; /* Raw key data */
262 SilcUInt32 key_len; /* Raw key data length */
263 unsigned char iv[SILC_CIPHER_MAX_IV_SIZE]; /* Current IV */
264 SilcHmac hmac; /* Current HMAC */
266 /* Channel private keys */
267 SilcDList private_keys; /* List of private keys or NULL */
268 SilcChannelPrivateKey curr_key; /* Current private key */
270 /* SilcChannelEntry status information */
271 SilcCipher old_channel_key;
274 SilcUInt16 resolve_cmd_ident; /* Command identifier when
275 resolving this entry */
279 /****s* silcclient/SilcClientAPI/SilcServerEntry
283 * typedef struct SilcServerEntryStruct { ... } *SilcServerEntry
287 * This structure represents a server in the SILC network. All servers
288 * that the client is aware of and have for example resolved with
289 * SILC_COMMAND_INFO command have their on SilcServerEntry structure.
293 struct SilcServerEntryStruct {
294 /* General information */
295 char *server_name; /* Server name */
296 char *server_info; /* Server info */
297 SilcServerID *server_id; /* Server ID */
298 SilcUInt16 resolve_cmd_ident; /* Command identifier when
299 resolving this entry */
303 /****d* silcclient/SilcClientAPI/SilcKeyAgreementStatus
307 * typedef enum { ... } SilcKeyAgreementStatus;
311 * Key agreement status types indicating the status of the key
312 * agreement protocol. These types are returned to the application
313 * in the SilcKeyAgreementCallback callback function.
318 SILC_KEY_AGREEMENT_OK, /* Everything is Ok */
319 SILC_KEY_AGREEMENT_ERROR, /* Unknown error occurred */
320 SILC_KEY_AGREEMENT_FAILURE, /* The protocol failed */
321 SILC_KEY_AGREEMENT_TIMEOUT, /* The protocol timeout */
322 SILC_KEY_AGREEMENT_ABORTED, /* The protocol aborted */
323 SILC_KEY_AGREEMENT_ALREADY_STARTED, /* Already started */
324 SILC_KEY_AGREEMENT_SELF_DENIED, /* Negotiationg with itself denied */
325 } SilcKeyAgreementStatus;
328 /****f* silcclient/SilcClientAPI/SilcKeyAgreementCallback
332 * typedef void (*SilcKeyAgreementCallback)(SilcClient client,
333 * SilcClientConnection conn,
334 * SilcClientEntry client_entry,
335 * SilcKeyAgreementStatus status,
336 * SilcSKEKeyMaterial *key,
341 * Key agreement callback that is called after the key agreement protocol
342 * has been performed. This is called also if error occurred during the
343 * key agreement protocol. The `key' is the allocated key material and
344 * the caller is responsible of freeing it. The `key' is NULL if error
345 * has occurred. The application can freely use the `key' to whatever
346 * purpose it needs. See lib/silcske/silcske.h for the definition of
347 * the SilcSKEKeyMaterial structure.
350 typedef void (*SilcKeyAgreementCallback)(SilcClient client,
351 SilcClientConnection conn,
352 SilcClientEntry client_entry,
353 SilcKeyAgreementStatus status,
354 SilcSKEKeyMaterial *key,
357 /****s* silcclient/SilcClientAPI/SilcPrivateMessageKeys
361 * typedef struct { ... } SilcPrivateMessageKeys;
365 * Structure to hold the list of private message keys. The array of this
366 * structure is returned by the silc_client_list_private_message_keys
372 SilcClientEntry client_entry; /* The remote client entry */
373 char *cipher; /* The cipher name */
374 unsigned char *key; /* The original key, If the appliation
375 provided it. This is NULL if the
376 library generated the key or if
377 the SKE key material was used. */
378 SilcUInt32 key_len; /* The key length */
379 } *SilcPrivateMessageKeys;
382 /****s* silcclient/SilcClientAPI/SilcChannelPrivateKey
386 * typedef struct SilcChannelPrivateKeyStruct { ... }
387 * *SilcChannelPrivateKey;
391 * Structure to hold one channel private key. The array of this structure
392 * is returned by silc_client_list_channel_private_keys function.
396 struct SilcChannelPrivateKeyStruct {
397 char *name; /* Application given name */
398 SilcCipher cipher; /* The cipher and key */
399 SilcHmac hmac; /* The HMAC and hmac key */
400 unsigned char *key; /* The key data */
401 SilcUInt32 key_len; /* The key length */
405 /****f* silcclient/SilcClientAPI/SilcAskPassphrase
409 * typedef void (*SilcAskPassphrase)(unsigned char *passphrase,
410 * SilcUInt32 passphrase_len,
415 * Ask passphrase callback. This is called by the application when the
416 * library calls `ask_passphrase' client operation. The callback delivers
417 * the passphrase to the library. The passphrases in SILC protocol
418 * MUST be in UTF-8 encoding, therefore the `passphrase' SHOULD be UTF-8
419 * encoded, and if it is not then library will attempt to encode it.
422 typedef void (*SilcAskPassphrase)(unsigned char *passphrase,
423 SilcUInt32 passphrase_len,
426 /****f* silcclient/SilcClientAPI/SilcVerifyPublicKey
430 * typedef void (*SilcVerifyPublicKey)(bool success, void *context);
434 * Public key (or certificate) verification callback. This is called
435 * by the application to indicate that the public key verification was
436 * either success or failure.
439 typedef void (*SilcVerifyPublicKey)(bool success, void *context);
441 /****f* silcclient/SilcClientAPI/SilcGetAuthMeth
445 * typedef void (*SilcGetAuthMeth)(bool success,
446 * SilcProtocolAuthMeth auth_meth,
447 * const unsigned char *auth_data,
448 * SilcUInt32 auth_data_len, void *context);
452 * Authentication method resolving callback. This is called by the
453 * application to return the resolved authentication method. The client
454 * library has called the get_auth_method client operation and given
455 * this function pointer as argument. The `success' will indicate whether
456 * the authentication method could be resolved. The `auth_meth' is the
457 * resolved authentication method. The `auth_data' and the `auth_data_len'
458 * are the resolved authentication data. The `context' is the libary's
459 * context sent to the get_auth_method client operation.
462 typedef void (*SilcGetAuthMeth)(bool success,
463 SilcProtocolAuthMeth auth_meth,
464 const unsigned char *auth_data,
465 SilcUInt32 auth_data_len, void *context);
467 /****d* silcclient/SilcClientAPI/SilcClientMessageType
471 * typedef enum { ... } SilcClientMessageType;
475 * Different message types for `say' client operation. The application
476 * may filter the message sent by the library according this type.
481 SILC_CLIENT_MESSAGE_INFO, /* Informational */
482 SILC_CLIENT_MESSAGE_WARNING, /* Warning */
483 SILC_CLIENT_MESSAGE_ERROR, /* Error */
484 SILC_CLIENT_MESSAGE_AUDIT, /* Auditable */
485 } SilcClientMessageType;
488 /****d* silcclient/SilcClientAPI/SilcClientConnectionStatus
492 * typedef enum { ... } SilcClientConnectionStatus
496 * This type is returned to the `connect' client operation to indicate
497 * the status of the created connection. It can indicated if it was
498 * successful or whether an error occurred.
503 SILC_CLIENT_CONN_SUCCESS, /* Successfully connected */
504 SILC_CLIENT_CONN_SUCCESS_RESUME, /* Successfully connected and
505 resumed old detached session */
506 SILC_CLIENT_CONN_ERROR, /* Error occurred during connecting */
507 } SilcClientConnectionStatus;
510 /****s* silcclient/SilcClientAPI/SilcClientOperations
514 * typedef struct { ... } SilcClientOperations;
518 * SILC Client Operations. These must be implemented by the application.
519 * The Client library may call any of these routines at any time. The
520 * routines are used to deliver certain information to the application
521 * or from the application to the client library.
526 /* Message sent to the application by library. `conn' associates the
527 message to a specific connection. `conn', however, may be NULL.
528 The `type' indicates the type of the message sent by the library.
529 The application can for example filter the message according the
531 void (*say)(SilcClient client, SilcClientConnection conn,
532 SilcClientMessageType type, char *msg, ...);
534 /* Message for a channel. The `sender' is the sender of the message
535 The `channel' is the channel. The `message' is the message. Note
536 that `message' maybe NULL. The `flags' indicates message flags
537 and it is used to determine how the message can be interpreted
538 (like it may tell the message is multimedia message). */
539 void (*channel_message)(SilcClient client, SilcClientConnection conn,
540 SilcClientEntry sender, SilcChannelEntry channel,
541 SilcMessageFlags flags,
542 const unsigned char *message,
543 SilcUInt32 message_len);
545 /* Private message to the client. The `sender' is the sender of the
546 message. The message is `message'and maybe NULL. The `flags'
547 indicates message flags and it is used to determine how the message
548 can be interpreted (like it may tell the message is multimedia
550 void (*private_message)(SilcClient client, SilcClientConnection conn,
551 SilcClientEntry sender, SilcMessageFlags flags,
552 const unsigned char *message,
553 SilcUInt32 message_len);
555 /* Notify message to the client. The notify arguments are sent in the
556 same order as servers sends them. The arguments are same as received
557 from the server except for ID's. If ID is received application receives
558 the corresponding entry to the ID. For example, if Client ID is received
559 application receives SilcClientEntry. Also, if the notify type is
560 for channel the channel entry is sent to application (even if server
561 does not send it because client library gets the channel entry from
562 the Channel ID in the packet's header). */
563 void (*notify)(SilcClient client, SilcClientConnection conn,
564 SilcNotifyType type, ...);
566 /* Command handler. This function is called always in the command function.
567 If error occurs it will be called as well. `conn' is the associated
568 client connection. `cmd_context' is the command context that was
569 originally sent to the command. `success' is FALSE if error occurred
570 during command. `command' is the command being processed. It must be
571 noted that this is not reply from server. This is merely called just
572 after application has called the command. Just to tell application
573 that the command really was processed. */
574 void (*command)(SilcClient client, SilcClientConnection conn,
575 SilcClientCommandContext cmd_context, bool success,
576 SilcCommand command, SilcStatus status);
578 /* Command reply handler. This function is called always in the command reply
579 function. If error occurs it will be called as well. Normal scenario
580 is that it will be called after the received command data has been parsed
581 and processed. The function is used to pass the received command data to
584 `conn' is the associated client connection. `cmd_payload' is the command
585 payload data received from server and it can be ignored. It is provided
586 if the application would like to re-parse the received command data,
587 however, it must be noted that the data is parsed already by the library
588 thus the payload can be ignored. `success' is FALSE if error occurred.
589 In this case arguments are not sent to the application. The `status' is
590 the command reply status server returned. The `command' is the command
591 reply being processed. The function has variable argument list and each
592 command defines the number and type of arguments it passes to the
593 application (on error they are not sent).
595 The arguments are sent in the same order as servers sends them. The
596 arguments are same as received from the server except for ID's. If
597 ID is received application receives the corresponding entry to the
598 ID. For example, if Client ID is receives application receives
600 void (*command_reply)(SilcClient client, SilcClientConnection conn,
601 SilcCommandPayload cmd_payload, bool success,
602 SilcCommand command, SilcStatus status, ...);
604 /* Called to indicate that connection was either successfully established
605 or connecting failed. This is also the first time application receives
606 the SilcClientConnection object which it should save somewhere.
607 The `status' indicated whether the connection were successful. If it
608 is error value the application must always call the function
609 silc_client_close_connection. */
610 void (*connected)(SilcClient client, SilcClientConnection conn,
611 SilcClientConnectionStatus status);
613 /* Called to indicate that connection was disconnected to the server.
614 The `status' may tell the reason of the disconnection, and if the
615 `message' is non-NULL it may include the disconnection message
616 received from server. */
617 void (*disconnected)(SilcClient client, SilcClientConnection conn,
618 SilcStatus status, const char *message);
620 /* Find authentication method and authentication data by hostname and
621 port. The hostname may be IP address as well. When the authentication
622 method has been resolved the `completion' callback with the found
623 authentication method and authentication data is called. The `conn'
625 void (*get_auth_method)(SilcClient client, SilcClientConnection conn,
626 char *hostname, SilcUInt16 port,
627 SilcGetAuthMeth completion, void *context);
629 /* Verifies received public key. The `conn_type' indicates which entity
630 (server, client etc.) has sent the public key. If user decides to trust
631 the application may save the key as trusted public key for later
632 use. The `completion' must be called after the public key has been
634 void (*verify_public_key)(SilcClient client, SilcClientConnection conn,
635 SilcSocketType conn_type, unsigned char *pk,
636 SilcUInt32 pk_len, SilcSKEPKType pk_type,
637 SilcVerifyPublicKey completion, void *context);
639 /* Ask (interact, that is) a passphrase from user. The passphrase is
640 returned to the library by calling the `completion' callback with
641 the `context'. The returned passphrase SHOULD be in UTF-8 encoded,
642 if not then the library will attempt to encode. */
643 void (*ask_passphrase)(SilcClient client, SilcClientConnection conn,
644 SilcAskPassphrase completion, void *context);
646 /* Notifies application that failure packet was received. This is called
647 if there is some protocol active in the client. The `protocol' is the
648 protocol context. The `failure' is opaque pointer to the failure
649 indication. Note, that the `failure' is protocol dependant and
650 application must explicitly cast it to correct type. Usually `failure'
651 is 32 bit failure type (see protocol specs for all protocol failure
653 void (*failure)(SilcClient client, SilcClientConnection conn,
654 SilcProtocol protocol, void *failure);
656 /* Asks whether the user would like to perform the key agreement protocol.
657 This is called after we have received an key agreement packet or an
658 reply to our key agreement packet. This returns TRUE if the user wants
659 the library to perform the key agreement protocol and FALSE if it is not
660 desired (application may start it later by calling the function
661 silc_client_perform_key_agreement). If TRUE is returned also the
662 `completion' and `context' arguments must be set by the application. */
663 bool (*key_agreement)(SilcClient client, SilcClientConnection conn,
664 SilcClientEntry client_entry, const char *hostname,
665 SilcUInt16 port, SilcKeyAgreementCallback *completion,
668 /* Notifies application that file transfer protocol session is being
669 requested by the remote client indicated by the `client_entry' from
670 the `hostname' and `port'. The `session_id' is the file transfer
671 session and it can be used to either accept or reject the file
672 transfer request, by calling the silc_client_file_receive or
673 silc_client_file_close, respectively. */
674 void (*ftp)(SilcClient client, SilcClientConnection conn,
675 SilcClientEntry client_entry, SilcUInt32 session_id,
676 const char *hostname, SilcUInt16 port);
678 /* Delivers SILC session detachment data indicated by `detach_data' to the
679 application. If application has issued SILC_COMMAND_DETACH command
680 the client session in the SILC network is not quit. The client remains
681 in the network but is detached. The detachment data may be used later
682 to resume the session in the SILC Network. The appliation is
683 responsible of saving the `detach_data', to for example in a file.
685 The detachment data can be given as argument to the functions
686 silc_client_connect_to_server, or silc_client_add_connection when
687 creating connection to remote server, inside SilcClientConnectionParams
688 structure. If it is provided the client library will attempt to resume
689 the session in the network. After the connection is created
690 successfully, the application is responsible of setting the user
691 interface for user into the same state it was before detaching (showing
692 same channels, channel modes, etc). It can do this by fetching the
693 information (like joined channels) from the client library. */
694 void (*detach)(SilcClient client, SilcClientConnection conn,
695 const unsigned char *detach_data,
696 SilcUInt32 detach_data_len);
697 } SilcClientOperations;
700 /****f* silcclient/SilcClientAPI/SilcNicknameFormatParse
704 * typedef void (*SilcNicknameFormatParse)(const char *nickname,
705 * char **ret_nickname);
709 * A callback function provided by the application for the library in
710 * SilcClientParams structure. This function parses the formatted
711 * nickname string `nickname' and returns the true nickname to the
712 * `ret_nickname' pointer. The library can call this function at
716 typedef void (*SilcNicknameFormatParse)(const char *nickname,
717 char **ret_nickname);
719 /****s* silcclient/SilcClientAPI/SilcClientParams
723 * typedef struct { ... } SilcClientParams;
727 * Client parameters. This can be filled with proper values and
728 * given as argument to the silc_client_alloc function. The structure
729 * hold various parameters which affects the function of the client.
734 /* Number of maximum tasks the client library's scheduler can handle.
735 If set to zero, the default value will be used (200). For WIN32
736 systems this should be set to 64 as it is the hard limit dictated
740 /* Rekey timeout in seconds. The client will perform rekey in this
741 time interval. If set to zero, the default value will be used. */
742 unsigned int rekey_secs;
744 /* Connection authentication method request timeout. If server does not
745 reply back the current authentication method when we've requested it
746 in this time interval we'll assume the reply will not come at all.
747 If set to zero, the default value (2 seconds) will be used. */
748 unsigned int connauth_request_secs;
750 /* Nickname format string. This can be used to order the client library
751 to save the nicknames in the library in a certain format. Since
752 nicknames are not unique in SILC it is possible to have multiple same
753 nicknames. Using this format string it is possible to order the library
754 to separate the multiple same nicknames from each other. The format
755 types are defined below and they can appear in any order in the format
756 string. If this is NULL then default format is used which is the
757 default nickname without anything else. The string MUST be NULL
760 Following format types are available:
762 %n nickname - the real nickname returned by the server (mandatory)
763 %h hostname - the stripped hostname of the client
764 %H full hostname - the full hostname of the client
765 %s server name - the server name the client is connected
766 %S full server - the full server name the client is connected
767 %a number - ascending number in case there are several
768 same nicknames (fe. nick@host and nick@host2)
770 Example format strings: "%n@%h%a" (fe. nick@host, nick@host2)
771 "%a!%n@%s" (fe. nick@server, 2!nick@server)
772 "%n@%H" (fe. nick@host.domain.com)
774 By default this format is employed to the nicknames by the libary
775 only when there appears multiple same nicknames. If the library has
776 only one nickname cached the nickname is saved as is and without the
777 defined format. If you want always to save the nickname in the defined
778 format set the boolean field `nickname_force_format' to value TRUE.
780 char nickname_format[32];
782 /* If this is set to TRUE then the `nickname_format' is employed to all
783 saved nicknames even if there are no multiple same nicknames in the
784 cache. By default this is FALSE, which means that the `nickname_format'
785 is employed only if the library will receive a nickname that is
786 already saved in the cache. It is recommended to leave this to FALSE
788 bool nickname_force_format;
790 /* A callback function provided by the application for the library to
791 parse the nickname from the formatted nickname string. Even though
792 the libary formats the nicknames the application knows generally the
793 format better so this function should be provided for the library
794 if the application sets the `nickname_format' field. The library
795 will call this to get the true nickname from the provided formatted
796 nickname string whenever it needs the true nickname. */
797 SilcNicknameFormatParse nickname_parse;
799 /* If this is set to TRUE then the client will ignore all incoming
800 Requested Attributes queries and does not reply anything back. This
801 usually leads into situation where server does not anymore send
802 the queries after seeing that client does not reply anything back.
803 If your application does not support Requested Attributes or you do
804 not want to use them set this to TRUE. See SilcAttribute and
805 silc_client_attribute_add for more information on attributes. */
806 bool ignore_requested_attributes;
812 /* Initialization functions (client.c) */
814 /****f* silcclient/SilcClientAPI/silc_client_alloc
818 * SilcClient silc_client_alloc(SilcClientOperations *ops,
819 * SilcClientParams *params,
821 * const char *silc_version);
825 * Allocates new client object. This has to be done before client may
826 * work. After calling this one must call silc_client_init to initialize
827 * the client. The `application' is application specific user data pointer
828 * and caller must free it. The `silc_version' is the application version
829 * that will be used to compare against remote host's (usually a server)
830 * version string. The `application' context is accessible by the
831 * application by client->application, client being SilcClient.
834 SilcClient silc_client_alloc(SilcClientOperations *ops,
835 SilcClientParams *params,
837 const char *version_string);
839 /****f* silcclient/SilcClientAPI/silc_client_free
843 * void silc_client_free(SilcClient client);
847 * Frees client object and its internals. The execution of the client
848 * should be stopped with silc_client_stop function before calling
852 void silc_client_free(SilcClient client);
854 /****f* silcclient/SilcClientAPI/silc_client_init
858 * bool silc_client_init(SilcClient client);
862 * Initializes the client. This makes all the necessary steps to make
863 * the client ready to be run. One must call silc_client_run to run the
864 * client. Returns FALSE if error occurred, TRUE otherwise.
867 bool silc_client_init(SilcClient client);
869 /****f* silcclient/SilcClientAPI/silc_client_run
873 * void silc_client_run(SilcClient client);
877 * Runs the client. This starts the scheduler from the utility library.
878 * When this functions returns the execution of the appliation is over.
879 * The client must be initialized before calling this.
882 void silc_client_run(SilcClient client);
884 /****f* silcclient/SilcClientAPI/silc_client_run_one
888 * void silc_client_run_one(SilcClient client);
892 * Runs the client and returns immeadiately. This function is used when
893 * the SILC Client object indicated by the `client' is run under some
894 * other scheduler, or event loop or main loop. On GUI applications,
895 * for example this may be desired to used to run the client under the
896 * GUI application's main loop. Typically the GUI application would
897 * register an idle task that calls this function multiple times in
898 * a second to quickly process the SILC specific data.
901 void silc_client_run_one(SilcClient client);
903 /****f* silcclient/SilcClientAPI/silc_client_stop
907 * void silc_client_stop(SilcClient client);
911 * Stops the client. This is called to stop the client and thus to stop
912 * the program. The client context must be freed with the silc_client_free
916 void silc_client_stop(SilcClient client);
919 /* Connecting functions (client.c) */
921 /****s* silcclient/SilcClientAPI/SilcClientConnectionParams
925 * typedef struct { ... } SilcClientConnectionParams;
929 * Client connection parameters. This can be filled by the application
930 * and given as argument to silc_client_connect_to_server or to
931 * silc_client_add_connection.
936 /* The SILC session detachment data that was returned by `detach' client
937 operation when the application detached from the network. Application
938 is responsible of saving the data and giving it as argument here
939 for resuming the session in the SILC network.
941 If this is provided here the client library will attempt to resume
942 the session in the network. After the connection is created
943 successfully, the application is responsible of setting the user
944 interface for user into the same state it was before detaching (showing
945 same channels, channel modes, etc). It can do this by fetching the
946 information (like joined channels) from the client library. */
947 unsigned char *detach_data;
948 SilcUInt32 detach_data_len;
950 } SilcClientConnectionParams;
953 /****f* silcclient/SilcClientAPI/silc_client_connect_to_server
957 * bool silc_client_connect_to_server(SilcClient client,
958 * SilcClientConnectionParams *params,
959 * int port, char *host, void *context);
963 * Connects to remote server. This is the main routine used to connect
964 * to SILC server. Returns -1 on error and the created socket otherwise.
965 * The `context' is user context that is saved into the SilcClientConnection
966 * that is created after the connection is created. Note that application
967 * may handle the connecting process outside the library. If this is the
968 * case then this function is not used at all. When the connecting is
969 * done the `connect' client operation is called, and the `context' is
970 * accessible with conn->context, conn being SilcClientConnection.
971 * If the `params' is provided they are used by the routine.
974 bool silc_client_connect_to_server(SilcClient client,
975 SilcClientConnectionParams *params,
976 int port, char *host, void *context);
978 /****f* silcclient/SilcClientAPI/silc_client_add_connection
983 * SilcClientConnection
984 * silc_client_add_connection(SilcClient client,
985 * SilcClientConnectionParams *params,
986 * char *hostname, int port, void *context);
990 * Allocates and adds new connection to the client. This adds the allocated
991 * connection to the connection table and returns a pointer to it. A client
992 * can have multiple connections to multiple servers. Every connection must
993 * be added to the client using this function. User data `context' may
994 * be sent as argument. If the `params' is provided they are used by
999 * This function is normally used only if the application performed
1000 * the connecting outside the library, and did not called the
1001 * silc_client_connect_to_server function at all. The library
1002 * however may use this internally.
1005 SilcClientConnection
1006 silc_client_add_connection(SilcClient client,
1007 SilcClientConnectionParams *params,
1008 char *hostname, int port, void *context);
1010 /****f* silcclient/SilcClientAPI/silc_client_del_connection
1014 * void silc_client_del_connection(SilcClient client,
1015 * SilcClientConnection conn);
1019 * Removes connection from client. Frees all memory. The library
1020 * call this function automatically for all connection contexts.
1021 * The application however may free the connection contexts it has
1025 void silc_client_del_connection(SilcClient client, SilcClientConnection conn);
1027 /****f* silcclient/SilcClientAPI/silc_client_add_socket
1031 * void silc_client_add_socket(SilcClient client,
1032 * SilcSocketConnection sock);
1036 * Adds listener socket to the listener sockets table. This function is
1037 * used to add socket objects that are listeners to the client. This should
1038 * not be used to add other connection objects.
1041 void silc_client_add_socket(SilcClient client, SilcSocketConnection sock);
1043 /****f* silcclient/SilcClientAPI/silc_client_del_socket
1047 * void silc_client_del_socket(SilcClient client,
1048 * SilcSocketConnection sock);
1052 * Deletes listener socket from the listener sockets table. If the
1053 * application has added a socket with silc_client_add_socket it must
1054 * also free it using this function.
1057 void silc_client_del_socket(SilcClient client, SilcSocketConnection sock);
1059 /****f* silcclient/SilcClientAPI/silc_client_start_key_exchange
1063 * void silc_client_start_key_exchange(SilcClient client,
1064 * SilcClientConnection conn,
1069 * Start SILC Key Exchange (SKE) protocol to negotiate shared secret
1070 * key material between client and server. This function can be called
1071 * directly if application is performing its own connecting and does not
1072 * use the connecting provided by this library. This function is normally
1073 * used only if the application performed the connecting outside the
1074 * library. The library however may use this internally. After the
1075 * key exchange is performed the `connect' client operation is called.
1078 void silc_client_start_key_exchange(SilcClient client,
1079 SilcClientConnection conn,
1082 /****f* silcclient/SilcClientAPI/silc_client_close_connection
1086 * void silc_client_close_connection(SilcClient client,
1087 * SilcClientConnection conn);
1091 * Closes connection to remote end. Free's all allocated data except
1092 * for some information such as nickname etc. that are valid at all time.
1095 void silc_client_close_connection(SilcClient client,
1096 SilcClientConnection conn);
1099 /* Message sending functions (client_channel.c and client_prvmsg.c) */
1101 /****f* silcclient/SilcClientAPI/silc_client_send_channel_message
1105 * void silc_client_send_channel_message(SilcClient client,
1106 * SilcClientConnection conn,
1107 * SilcChannelEntry channel,
1108 * SilcChannelPrivateKey key,
1109 * SilcMessageFlags flags,
1110 * unsigned char *data,
1111 * SilcUInt32 data_len,
1116 * Sends packet to the `channel'. Packet to channel is always encrypted
1117 * differently from "normal" packets. SILC header of the packet is
1118 * encrypted with the next receiver's key and the rest of the packet is
1119 * encrypted with the channel specific key. Padding and HMAC is computed
1120 * with the next receiver's key. The `data' is the channel message. If
1121 * the `force_send' is TRUE then the packet is sent immediately.
1123 * If `key' is provided then that private key is used to encrypt the
1124 * channel message. If it is not provided, private keys has not been
1125 * set at all, the normal channel key is used automatically. If private
1126 * keys are set then the first key (the key that was added first as
1127 * private key) is used.
1130 void silc_client_send_channel_message(SilcClient client,
1131 SilcClientConnection conn,
1132 SilcChannelEntry channel,
1133 SilcChannelPrivateKey key,
1134 SilcMessageFlags flags,
1135 unsigned char *data,
1136 SilcUInt32 data_len,
1139 /****f* silcclient/SilcClientAPI/silc_client_send_private_message
1143 * void silc_client_send_private_message(SilcClient client,
1144 * SilcClientConnection conn,
1145 * SilcClientEntry client_entry,
1146 * SilcMessageFlags flags,
1147 * unsigned char *data,
1148 * SilcUInt32 data_len,
1153 * Sends private message to remote client. If private message key has
1154 * not been set with this client then the message will be encrypted using
1155 * normal session keys. Private messages are special packets in SILC
1156 * network hence we need this own function for them. This is similar
1157 * to silc_client_packet_send_to_channel except that we send private
1158 * message. The `data' is the private message. If the `force_send' is
1159 * TRUE the packet is sent immediately.
1162 void silc_client_send_private_message(SilcClient client,
1163 SilcClientConnection conn,
1164 SilcClientEntry client_entry,
1165 SilcMessageFlags flags,
1166 unsigned char *data,
1167 SilcUInt32 data_len,
1171 /* Client and Channel entry retrieval (idlist.c) */
1173 /****f* silcclient/SilcClientAPI/SilcGetClientCallback
1177 * typedef void (*SilcGetClientCallback)(SilcClient client,
1178 * SilcClientConnection conn,
1179 * SilcClientEntry *clients,
1180 * SilcUInt32 clients_count,
1185 * Callback function given to the silc_client_get_client function. The
1186 * found entries are allocated into the `clients' array. The array must
1187 * not be freed by the receiver, the library will free it later. If the
1188 * `clients' is NULL, no such clients exist in the SILC Network.
1191 typedef void (*SilcGetClientCallback)(SilcClient client,
1192 SilcClientConnection conn,
1193 SilcClientEntry *clients,
1194 SilcUInt32 clients_count,
1197 /****f* silcclient/SilcClientAPI/silc_client_get_clients
1201 * void silc_client_get_clients(SilcClient client,
1202 * SilcClientConnection conn,
1203 * const char *nickname,
1204 * const char *server,
1205 * SilcGetClientCallback completion,
1210 * Finds client entry or entries by the `nickname' and `server'. The
1211 * completion callback will be called when the client entries has been
1212 * found. After the server returns the client information it is cached
1213 * and can be accesses locally at a later time.
1217 * NOTE: This function is always asynchronous and resolves the client
1218 * information from the server. Thus, if you already know the client
1219 * information then use the silc_client_get_client_by_id function to
1220 * get the client entry since this function may be very slow and should
1221 * be used only to initially get the client entries.
1224 void silc_client_get_clients(SilcClient client,
1225 SilcClientConnection conn,
1226 const char *nickname,
1228 SilcGetClientCallback completion,
1231 /****f* silcclient/SilcClientAPI/silc_client_get_clients_local
1235 * SilcClientEntry *silc_client_get_clients_local(SilcClient client,
1236 * SilcClientConnection conn,
1237 * const char *nickname,
1238 * const char *format,
1239 * SilcUInt32 *clients_count);
1243 * Same as silc_client_get_clients function but does not resolve anything
1244 * from the server. This checks local cache and returns all matching
1245 * clients from the local cache. If none was found this returns NULL.
1246 * The `nickname' is the real nickname of the client, and the `format'
1247 * is the formatted nickname to find exact match from multiple found
1248 * entries. The format must be same as given in the SilcClientParams
1249 * structure to the client library. If the `format' is NULL all found
1250 * clients by `nickname' are returned. The caller must return the
1254 SilcClientEntry *silc_client_get_clients_local(SilcClient client,
1255 SilcClientConnection conn,
1256 const char *nickname,
1258 SilcUInt32 *clients_count);
1260 /****f* silcclient/SilcClientAPI/silc_client_get_clients_by_list
1264 * void silc_client_get_clients_by_list(SilcClient client,
1265 * SilcClientConnection conn,
1266 * SilcUInt32 list_count,
1267 * SilcBuffer client_id_list,
1268 * SilcGetClientCallback completion,
1273 * Gets client entries by the list of client ID's `client_id_list'. This
1274 * always resolves those client ID's it does not know yet from the server
1275 * so this function might take a while. The `client_id_list' is a list
1276 * of ID Payloads added one after other. JOIN command reply and USERS
1277 * command reply for example returns this sort of list. The `completion'
1278 * will be called after the entries are available. When server returns
1279 * the client information it will be cached and can be accessed locally
1283 void silc_client_get_clients_by_list(SilcClient client,
1284 SilcClientConnection conn,
1285 SilcUInt32 list_count,
1286 SilcBuffer client_id_list,
1287 SilcGetClientCallback completion,
1290 /****f* silcclient/SilcClientAPI/silc_client_get_client_by_id
1294 * SilcClientEntry silc_client_get_client_by_id(SilcClient client,
1295 * SilcClientConnection conn,
1296 * SilcClientID *client_id);
1300 * Find entry for client by the client's ID. Returns the entry or NULL
1301 * if the entry was not found. This checks the local cache and does
1302 * not resolve anything from server.
1305 SilcClientEntry silc_client_get_client_by_id(SilcClient client,
1306 SilcClientConnection conn,
1307 SilcClientID *client_id);
1309 /****f* silcclient/SilcClientAPI/silc_client_get_client_by_id_resolve
1314 * silc_client_get_client_by_id_resolve(SilcClient client,
1315 * SilcClientConnection conn,
1316 * SilcClientID *client_id,
1317 * SilcBuffer attributes,
1318 * SilcGetClientCallback completion,
1323 * Same as silc_client_get_client_by_id but will always resolve the
1324 * information from the server. Use this only if you know that you
1325 * do not have the entry and the only thing you know about the client
1326 * is its ID. When server returns the client information it will be
1327 * cache and can be accessed locally at a later time.
1329 * If the `attributes' is non-NULL then the buffer includes Requested
1330 * Attributes which can be used to fetch very detailed information
1331 * about the user. If it is NULL then only normal WHOIS query is
1332 * made (for more information about attributes see SilcAttribute).
1333 * Caller may create the `attributes' with silc_client_attributes_request
1337 void silc_client_get_client_by_id_resolve(SilcClient client,
1338 SilcClientConnection conn,
1339 SilcClientID *client_id,
1340 SilcBuffer attributes,
1341 SilcGetClientCallback completion,
1344 /****f* silcclient/SilcClientAPI/silc_client_del_client
1348 * bool silc_client_del_client(SilcClient client, SilcClientConnection conn,
1349 * SilcClientEntry client_entry)
1353 * Removes client from local cache by the client entry indicated by
1354 * the `client_entry'. Returns TRUE if the deletion were successful.
1357 bool silc_client_del_client(SilcClient client, SilcClientConnection conn,
1358 SilcClientEntry client_entry);
1360 /****f* silcclient/SilcClientAPI/SilcGetChannelCallback
1364 * typedef void (*SilcGetChannelCallback)(SilcClient client,
1365 * SilcClientConnection conn,
1366 * SilcChannelEntry *channels,
1367 * SilcUInt32 channels_count,
1372 * Callback function given to the silc_client_get_channel_* functions.
1373 * The found entries are allocated into the `channels' array. The array
1374 * must not be freed by the receiver, the library will free it later.
1375 * If the `channel' is NULL, no such channel exist in the SILC Network.
1378 typedef void (*SilcGetChannelCallback)(SilcClient client,
1379 SilcClientConnection conn,
1380 SilcChannelEntry *channels,
1381 SilcUInt32 channels_count,
1384 /****f* silcclient/SilcClientAPI/silc_client_get_channel
1388 * SilcChannelEntry silc_client_get_channel(SilcClient client,
1389 * SilcClientConnection conn,
1394 * Finds entry for channel by the channel name. Returns the entry or NULL
1395 * if the entry was not found. It is found only if the client is joined
1399 SilcChannelEntry silc_client_get_channel(SilcClient client,
1400 SilcClientConnection conn,
1403 /****f* silcclient/SilcClientAPI/silc_client_get_channel_by_id
1408 * silc_client_get_channel_by_id(SilcClient client,
1409 * SilcClientConnection conn,
1410 * SilcChannelID *channel_id);
1414 * Finds channel entry by the channel name. Returns the entry or NULL
1415 * if it was not found.
1418 SilcChannelEntry silc_client_get_channel_by_id(SilcClient client,
1419 SilcClientConnection conn,
1420 SilcChannelID *channel_id);
1422 /****f* silcclient/SilcClientAPI/silc_client_get_channel_by_id_resolve
1427 * silc_client_get_channel_by_id_resolve(SilcClient client,
1428 * SilcClientConnection conn,
1429 * SilcChannelID *channel_id,
1430 * SilcGetClientCallback completion,
1435 * Resolves the channel information (its name mainly) from the server
1436 * by the `channel_id'. Use this only if you know that you do not have
1437 * the entry cached locally.
1440 void silc_client_get_channel_by_id_resolve(SilcClient client,
1441 SilcClientConnection conn,
1442 SilcChannelID *channel_id,
1443 SilcGetChannelCallback completion,
1446 /****f* silcclient/SilcClientAPI/silc_client_del_channel
1450 * bool silc_client_del_channel(SilcClient client,
1451 * SilcClientConnection conn,
1452 * SilcChannelEntry channel)
1456 * Removes channel from local cache by the channel entry indicated by
1457 * the `channel'. Returns TRUE if the deletion were successful.
1460 bool silc_client_del_channel(SilcClient client, SilcClientConnection conn,
1461 SilcChannelEntry channel);
1463 /****f* silcclient/SilcClientAPI/silc_client_get_server
1467 * SilcServerEntry silc_client_get_server(SilcClient client,
1468 * SilcClientConnection conn,
1469 * char *server_name)
1473 * Finds entry for server by the server name. Returns the entry or NULL
1474 * if the entry was not found.
1477 SilcServerEntry silc_client_get_server(SilcClient client,
1478 SilcClientConnection conn,
1481 /****f* silcclient/SilcClientAPI/silc_client_get_server_by_id
1485 * SilcServerEntry silc_client_get_server_by_id(SilcClient client,
1486 * SilcClientConnection conn,
1487 * SilcServerID *server_id);
1491 * Finds entry for server by the server ID. Returns the entry or NULL
1492 * if the entry was not found.
1495 SilcServerEntry silc_client_get_server_by_id(SilcClient client,
1496 SilcClientConnection conn,
1497 SilcServerID *server_id);
1499 /****f* silcclient/SilcClientAPI/silc_client_del_server
1503 * bool silc_client_del_server(SilcClient client, SilcClientConnection conn,
1504 * SilcServerEntry server);
1508 * Removes server from local cache by the server entry indicated by
1509 * the `server'. Returns TRUE if the deletion were successful.
1512 bool silc_client_del_server(SilcClient client, SilcClientConnection conn,
1513 SilcServerEntry server);
1515 /****f* silcclient/SilcClientAPI/silc_client_on_channel
1519 * SilcChannelUser silc_client_on_channel(SilcChannelEntry channel,
1520 * SilcClientEntry client_entry);
1524 * Returns the ChannelUser entry if the `client_entry' is joined on the
1525 * channel indicated by the `channel'. NULL if client is not joined on
1529 SilcChannelUser silc_client_on_channel(SilcChannelEntry channel,
1530 SilcClientEntry client_entry);
1532 /* Command management (command.c) */
1534 /****f* silcclient/SilcClientAPI/silc_client_command_call
1538 * bool silc_client_command_call(SilcClient client,
1539 * SilcClientConnection conn,
1540 * const char *command_line, ...);
1544 * Calls and executes the command indicated by the `command_name'.
1545 * The `command_line' is a string which includes the command's name and
1546 * its arguments separated with whitespaces (' '). If `command_line'
1547 * is non-NULL then all variable arguments are ignored by default.
1549 * If `command_line' is NULL, then the variable arguments define the
1550 * command's name and its arguments. The first variable argument must
1551 * be the command name. The variable argument list must be terminated
1554 * Returns FALSE if the command is not known and TRUE after command.
1555 * execution. The "command" client operation is called when the
1556 * command is executed to indicate whether the command executed
1557 * successfully or not.
1559 * The "command_reply" client operation will be called when reply is
1560 * received from the server to the command. Application may also use
1561 * the silc_client_command_pending to attach to the command reply.
1562 * The command identifier for silc_client_command_pending function after
1563 * this function call is conn->cmd_ident, which application may use.
1567 * silc_client_command_call(client, conn, NULL, "PING", "silc.silcnet.org",
1569 * silc_client_command_call(client, conn, "PING silc.silcnet.org");
1572 bool silc_client_command_call(SilcClient client,
1573 SilcClientConnection conn,
1574 const char *command_line, ...);
1576 /****f* silcclient/SilcClientAPI/silc_client_command_send
1580 * void silc_client_command_send(SilcClient client,
1581 * SilcClientConnection conn,
1582 * SilcCommand command, SilcUInt16 ident,
1583 * SilcUInt32 argc, ...);
1587 * Generic function to send any command. The arguments must be sent already
1588 * encoded into correct form and in correct order. If application wants
1589 * to perform the commands by itself, it can do so and send the data
1590 * directly to the server using this function. If application is using
1591 * the silc_client_command_call, this function is usually not used.
1592 * Note that this overriders the Client Librarys commands and sends
1593 * the command packet directly to server.
1595 * The variable arguments are a pair of { type, data, data_length },
1596 * and the `argc' is the number of these pairs.
1600 * silc_client_command_send(client, conn, SILC_COMMAND_WHOIS, 0, 1,
1601 * 1, nickname, strlen(nickname));
1604 void silc_client_command_send(SilcClient client, SilcClientConnection conn,
1605 SilcCommand command, SilcUInt16 ident,
1606 SilcUInt32 argc, ...);
1608 /****f* silcclient/SilcClientAPI/silc_client_command_pending
1612 * void silc_client_command_pending(SilcClientConnection conn,
1613 * SilcCommand reply_cmd,
1615 * SilcCommandCb callback,
1620 * This function can be used to add pending command callback to be
1621 * called when an command reply is received to an earlier sent command.
1622 * The `reply_cmd' is the command that must be received in order for
1623 * the pending command callback indicated by `callback' to be called.
1624 * The `callback' will deliver the `context' and
1625 * SilcClientCommandReplyContext which includes the internals of the
1628 * The `ident' is a command identifier which was set for the earlier
1629 * sent command. The command reply will include the same identifier
1630 * and pending command callback will be called when the reply is
1631 * received with the same command identifier. It is possible to
1632 * add multiple pending command callbacks for same command and for
1635 * Application may use this function to add its own command reply
1636 * handlers if it wishes not to use the standard `command_reply'
1637 * client operation. However, note that the pending command callback
1638 * does not deliver parsed command reply, but application must parse
1641 * Note also that the application is notified about the received command
1642 * reply through the `command_reply' client operation before calling
1643 * the `callback` pending command callback. That is the normal
1644 * command reply handling, and is called regardless whether pending
1645 * command callbacks are used or not.
1647 * Commands that application calls with silc_client_command_call
1648 * will use a command identifier from conn->cmd_ident variable. After
1649 * calling the silc_client_command_call, the conn->cmd_ident includes
1650 * the command identifier that was used for the command sending.
1654 * silc_client_command_call(client, conn, "PING silc.silcnet.org");
1655 * silc_client_command_pending(conn, SILC_COMMAND_PING, conn->cmd_ident,
1656 * my_ping_handler, my_ping_context);
1659 void silc_client_command_pending(SilcClientConnection conn,
1660 SilcCommand reply_cmd,
1662 SilcCommandCb callback,
1666 /* Private Message key management (client_prvmsg.c) */
1668 /****f* silcclient/SilcClientAPI/silc_client_add_private_message_key
1672 * bool silc_client_add_private_message_key(SilcClient client,
1673 * SilcClientConnection conn,
1674 * SilcClientEntry client_entry,
1675 * const char *cipher,
1677 * unsigned char *key,
1678 * SilcUInt32 key_len,
1679 * bool generate_key,
1684 * Adds private message key to the client library. The key will be used to
1685 * encrypt all private message between the client and the remote client
1686 * indicated by the `client_entry'. If the `key' is NULL and the boolean
1687 * value `generate_key' is TRUE the library will generate random key.
1688 * The `key' maybe for example pre-shared-key, passphrase or similar.
1689 * The `cipher' and `hmac' MAY be provided but SHOULD be NULL to assure
1690 * that the requirements of the SILC protocol are met. The API, however,
1691 * allows to allocate any cipher and HMAC.
1693 * If `responder' is TRUE then the sending and receiving keys will be
1694 * set according the client being the receiver of the private key. If
1695 * FALSE the client is being the sender (or negotiator) of the private
1698 * It is not necessary to set key for normal private message usage. If the
1699 * key is not set then the private messages are encrypted using normal
1700 * session keys. Setting the private key, however, increases the security.
1702 * Returns FALSE if the key is already set for the `client_entry', TRUE
1706 bool silc_client_add_private_message_key(SilcClient client,
1707 SilcClientConnection conn,
1708 SilcClientEntry client_entry,
1716 /****f* silcclient/SilcClientAPI/silc_client_add_private_message_key_ske
1721 * silc_client_add_private_message_key_ske(SilcClient client,
1722 * SilcClientConnection conn,
1723 * SilcClientEntry client_entry,
1724 * const char *cipher,
1726 * SilcSKEKeyMaterial *key);
1730 * Same as silc_client_add_private_message_key but takes the key material
1731 * from the SKE key material structure. This structure is received if
1732 * the application uses the silc_client_send_key_agreement to negotiate
1733 * the key material. The `cipher' and `hmac' SHOULD be provided as it is
1734 * negotiated also in the SKE protocol.
1737 bool silc_client_add_private_message_key_ske(SilcClient client,
1738 SilcClientConnection conn,
1739 SilcClientEntry client_entry,
1742 SilcSKEKeyMaterial *key,
1745 /****f* silcclient/SilcClientAPI/silc_client_del_private_message_key
1749 * bool silc_client_del_private_message_key(SilcClient client,
1750 * SilcClientConnection conn,
1751 * SilcClientEntry client_entry);
1755 * Removes the private message from the library. The key won't be used
1756 * after this to protect the private messages with the remote `client_entry'
1757 * client. Returns FALSE on error, TRUE otherwise.
1760 bool silc_client_del_private_message_key(SilcClient client,
1761 SilcClientConnection conn,
1762 SilcClientEntry client_entry);
1764 /****f* silcclient/SilcClientAPI/silc_client_list_private_message_keys
1768 * SilcPrivateMessageKeys
1769 * silc_client_list_private_message_keys(SilcClient client,
1770 * SilcClientConnection conn,
1771 * SilcUInt32 *key_count);
1775 * Returns array of set private message keys associated to the connection
1776 * `conn'. Returns allocated SilcPrivateMessageKeys array and the array
1777 * count to the `key_count' argument. The array must be freed by the caller
1778 * by calling the silc_client_free_private_message_keys function. Note:
1779 * the keys returned in the array is in raw format. It might not be desired
1780 * to show the keys as is. The application might choose not to show the keys
1781 * at all or to show the fingerprints of the keys.
1784 SilcPrivateMessageKeys
1785 silc_client_list_private_message_keys(SilcClient client,
1786 SilcClientConnection conn,
1787 SilcUInt32 *key_count);
1789 /****f* silcclient/SilcClientAPI/silc_client_free_private_message_keys
1793 * void silc_client_free_private_message_keys(SilcPrivateMessageKeys keys,
1794 * SilcUInt32 key_count);
1798 * Frees the SilcPrivateMessageKeys array returned by the function
1799 * silc_client_list_private_message_keys.
1802 void silc_client_free_private_message_keys(SilcPrivateMessageKeys keys,
1803 SilcUInt32 key_count);
1806 /* Channel private key management (client_channel.c,
1807 SilcChannelPrivateKey is defined in idlist.h) */
1809 /****f* silcclient/SilcClientAPI/silc_client_add_channel_private_key
1813 * bool silc_client_add_channel_private_key(SilcClient client,
1814 * SilcClientConnection conn,
1815 * SilcChannelEntry channel,
1819 * unsigned char *key,
1820 * SilcUInt32 key_len);
1824 * Adds private key for channel. This may be set only if the channel's mode
1825 * mask includes the SILC_CHANNEL_MODE_PRIVKEY. This returns FALSE if the
1826 * mode is not set. When channel has private key then the messages are
1827 * encrypted using that key. All clients on the channel must also know the
1828 * key in order to decrypt the messages. However, it is possible to have
1829 * several private keys per one channel. In this case only some of the
1830 * clients on the channel may know the one key and only some the other key.
1831 * The `name' can be application given name for the key.
1833 * The private key for channel is optional. If it is not set then the
1834 * channel messages are encrypted using the channel key generated by the
1835 * server. However, setting the private key (or keys) for the channel
1836 * significantly adds security. If more than one key is set the library
1837 * will automatically try all keys at the message decryption phase. Note:
1838 * setting many keys slows down the decryption phase as all keys has to
1839 * be tried in order to find the correct decryption key. However, setting
1840 * a few keys does not have big impact to the decryption performace.
1844 * NOTE: This is entirely local setting. The key set using this function
1845 * is not sent to the network at any phase.
1847 * NOTE: If the key material was originated by the SKE protocol (using
1848 * silc_client_send_key_agreement) then the `key' MUST be the
1849 * key->send_enc_key as this is dictated by the SILC protocol. However,
1850 * currently it is not expected that the SKE key material would be used
1851 * as channel private key. However, this API allows it.
1854 bool silc_client_add_channel_private_key(SilcClient client,
1855 SilcClientConnection conn,
1856 SilcChannelEntry channel,
1861 SilcUInt32 key_len);
1863 /****f* silcclient/SilcClientAPI/silc_client_del_channel_private_keys
1867 * bool silc_client_del_channel_private_keys(SilcClient client,
1868 * SilcClientConnection conn,
1869 * SilcChannelEntry channel);
1873 * Removes all private keys from the `channel'. The old channel key is used
1874 * after calling this to protect the channel messages. Returns FALSE on
1875 * on error, TRUE otherwise.
1878 bool silc_client_del_channel_private_keys(SilcClient client,
1879 SilcClientConnection conn,
1880 SilcChannelEntry channel);
1882 /****f* silcclient/SilcClientAPI/silc_client_del_channel_private_key
1886 * bool silc_client_del_channel_private_key(SilcClient client,
1887 * SilcClientConnection conn,
1888 * SilcChannelEntry channel,
1889 * SilcChannelPrivateKey key);
1893 * Removes and frees private key `key' from the channel `channel'.
1894 * The `key' is retrieved by calling the function
1895 * silc_client_list_channel_private_keys. The key is not used after
1896 * this. If the key was last private key then the old channel key is
1897 * used hereafter to protect the channel messages. This returns FALSE
1898 * on error, TRUE otherwise.
1901 bool silc_client_del_channel_private_key(SilcClient client,
1902 SilcClientConnection conn,
1903 SilcChannelEntry channel,
1904 SilcChannelPrivateKey key);
1906 /****f* silcclient/SilcClientAPI/silc_client_list_channel_private_keys
1910 * SilcChannelPrivateKey *
1911 * silc_client_list_channel_private_keys(SilcClient client,
1912 * SilcClientConnection conn,
1913 * SilcChannelEntry channel,
1914 * SilcUInt32 *key_count);
1918 * Returns array (pointers) of private keys associated to the `channel'.
1919 * The caller must free the array by calling the function
1920 * silc_client_free_channel_private_keys. The pointers in the array may be
1921 * used to delete the specific key by giving the pointer as argument to the
1922 * function silc_client_del_channel_private_key.
1925 SilcChannelPrivateKey *
1926 silc_client_list_channel_private_keys(SilcClient client,
1927 SilcClientConnection conn,
1928 SilcChannelEntry channel,
1929 SilcUInt32 *key_count);
1931 /****f* silcclient/SilcClientAPI/silc_client_free_channel_private_keys
1935 * void silc_client_free_channel_private_keys(SilcChannelPrivateKey *keys,
1936 * SilcUInt32 key_count);
1940 * Frees the SilcChannelPrivateKey array.
1943 void silc_client_free_channel_private_keys(SilcChannelPrivateKey *keys,
1944 SilcUInt32 key_count);
1946 /****f* silcclient/SilcClientAPI/silc_client_current_channel_private_key
1950 * void silc_client_current_channel_private_key(SilcClient client,
1951 * SilcClientConnection conn,
1952 * SilcChannelEntry channel,
1953 * SilcChannelPrivateKey key);
1957 * Sets the `key' to be used as current channel private key on the
1958 * `channel'. Packet sent after calling this function will be secured
1962 void silc_client_current_channel_private_key(SilcClient client,
1963 SilcClientConnection conn,
1964 SilcChannelEntry channel,
1965 SilcChannelPrivateKey key);
1968 /* Key Agreement routines (client_keyagr.c) */
1970 /****f* silcclient/SilcClientAPI/silc_client_send_key_agreement
1974 * void silc_client_send_key_agreement(SilcClient client,
1975 * SilcClientConnection conn,
1976 * SilcClientEntry client_entry,
1979 * SilcUInt32 timeout_secs,
1980 * SilcKeyAgreementCallback completion,
1985 * Sends key agreement request to the remote client indicated by the
1986 * `client_entry'. If the caller provides the `hostname' and the `port'
1987 * arguments then the library will bind the client to that hostname and
1988 * that port for the key agreement protocol. It also sends the `hostname'
1989 * and the `port' in the key agreement packet to the remote client. This
1990 * would indicate that the remote client may initiate the key agreement
1991 * protocol to the `hostname' on the `port'. If port is zero then the
1992 * bound port is undefined (the operating system defines it).
1994 * If the `hostname' and `port' is not provided then empty key agreement
1995 * packet is sent to the remote client. The remote client may reply with
1996 * the same packet including its hostname and port. If the library receives
1997 * the reply from the remote client the `key_agreement' client operation
1998 * callback will be called to verify whether the user wants to perform the
1999 * key agreement or not.
2003 * NOTE: If the application provided the `hostname' and the `port' and the
2004 * remote side initiates the key agreement protocol it is not verified
2005 * from the user anymore whether the protocol should be executed or not.
2006 * By setting the `hostname' and `port' the user gives permission to
2007 * perform the protocol (we are responder in this case).
2009 * NOTE: If the remote side decides not to initiate the key agreement
2010 * or decides not to reply with the key agreement packet then we cannot
2011 * perform the key agreement at all. If the key agreement protocol is
2012 * performed the `completion' callback with the `context' will be called.
2013 * If remote side decides to ignore the request the `completion' will be
2014 * called after the specified timeout, `timeout_secs'.
2016 * NOTE: If the `hostname' and the `port' was not provided the `completion'
2017 * will not be called at all since this does nothing more than sending
2018 * a packet to the remote host.
2020 * NOTE: There can be only one active key agreement for one client entry.
2021 * Before setting new one, the old one must be finished (it is finished
2022 * after calling the completion callback) or the function
2023 * silc_client_abort_key_agreement must be called.
2026 void silc_client_send_key_agreement(SilcClient client,
2027 SilcClientConnection conn,
2028 SilcClientEntry client_entry,
2029 const char *hostname,
2030 const char *bindhost,
2032 SilcUInt32 timeout_secs,
2033 SilcKeyAgreementCallback completion,
2036 /****f* silcclient/SilcClientAPI/silc_client_perform_key_agreement
2041 * silc_client_perform_key_agreement(SilcClient client,
2042 * SilcClientConnection conn,
2043 * SilcClientEntry client_entry,
2046 * SilcKeyAgreementCallback completion,
2051 * Performs the actual key agreement protocol. Application may use this
2052 * to initiate the key agreement protocol. This can be called for example
2053 * after the application has received the `key_agreement' client operation,
2054 * and did not return TRUE from it.
2056 * The `hostname' is the remote hostname (or IP address) and the `port'
2057 * is the remote port. The `completion' callback with the `context' will
2058 * be called after the key agreement protocol.
2062 * NOTE: If the application returns TRUE in the `key_agreement' client
2063 * operation the library will automatically start the key agreement. In this
2064 * case the application must not call this function. However, application
2065 * may choose to just ignore the `key_agreement' client operation (and
2066 * merely just print information about it on the screen) and call this
2067 * function when the user whishes to do so (by, for example, giving some
2068 * specific command). Thus, the API provides both, automatic and manual
2069 * initiation of the key agreement. Calling this function is the manual
2070 * initiation and returning TRUE in the `key_agreement' client operation
2071 * is the automatic initiation.
2074 void silc_client_perform_key_agreement(SilcClient client,
2075 SilcClientConnection conn,
2076 SilcClientEntry client_entry,
2079 SilcKeyAgreementCallback completion,
2082 /****f* silcclient/SilcClientAPI/silc_client_perform_key_agreement_fd
2087 * silc_client_perform_key_agreement_fd(SilcClient client,
2088 * SilcClientConnection conn,
2089 * SilcClientEntry client_entry,
2092 * SilcKeyAgreementCallback completion,
2097 * Same as above but application has created already the connection to
2098 * the remote host. The `sock' is the socket to the remote connection.
2099 * Application can use this function if it does not want the client library
2100 * to create the connection.
2103 void silc_client_perform_key_agreement_fd(SilcClient client,
2104 SilcClientConnection conn,
2105 SilcClientEntry client_entry,
2108 SilcKeyAgreementCallback completion,
2111 /****f* silcclient/SilcClientAPI/silc_client_abort_key_agreement
2115 * void silc_client_abort_key_agreement(SilcClient client,
2116 * SilcClientConnection conn,
2117 * SilcClientEntry client_entry);
2121 * This function can be called to unbind the hostname and the port for
2122 * the key agreement protocol. However, this function has effect only
2123 * before the key agreement protocol has been performed. After it has
2124 * been performed the library will automatically unbind the port. The
2125 * `client_entry' is the client to which we sent the key agreement
2126 * request. The key agreement completion callback will be called
2127 * with SILC_KEY_AGREEMENT_ABORTED status.
2130 void silc_client_abort_key_agreement(SilcClient client,
2131 SilcClientConnection conn,
2132 SilcClientEntry client_entry);
2135 /* Misc functions */
2137 /****f* silcclient/SilcClientAPI/silc_client_set_away_message
2141 * void silc_client_set_away_message(SilcClient client,
2142 * SilcClientConnection conn,
2147 * Sets away `message'. The away message may be set when the client's
2148 * mode is changed to SILC_UMODE_GONE and the client whishes to reply
2149 * to anyone who sends private message. The `message' will be sent
2150 * automatically back to the the client who send private message. If
2151 * away message is already set this replaces the old message with the
2152 * new one. If `message' is NULL the old away message is removed.
2153 * The sender may freely free the memory of the `message'.
2156 void silc_client_set_away_message(SilcClient client,
2157 SilcClientConnection conn,
2160 /****f* silcclient/SilcClientAPI/SilcConnectionAuthRequest
2164 * typedef void (*SilcConnectionAuthRequest)(SilcClient client,
2165 * SilcClientConnection conn,
2166 * SilcAuthMethod auth_meth,
2171 * Connection authentication method request callback. This is called
2172 * by the client library after it has received the authentication method
2173 * that the application requested by calling the function
2174 * silc_client_request_authentication_method.
2177 typedef void (*SilcConnectionAuthRequest)(SilcClient client,
2178 SilcClientConnection conn,
2179 SilcAuthMethod auth_meth,
2182 /****f* silcclient/SilcClientAPI/silc_client_request_authentication_method
2187 * silc_client_request_authentication_method(SilcClient client,
2188 * SilcClientConnection conn,
2189 * SilcConnectionAuthRequest
2195 * This function can be used to request the current authentication method
2196 * from the server. This may be called when connecting to the server
2197 * and the client library requests the authentication data from the
2198 * application. If the application does not know the current authentication
2199 * method it can request it from the server using this function.
2200 * The `callback' with `context' will be called after the server has
2201 * replied back with the current authentication method.
2205 silc_client_request_authentication_method(SilcClient client,
2206 SilcClientConnection conn,
2207 SilcConnectionAuthRequest callback,
2210 /****d* silcclient/SilcClientAPI/SilcClientMonitorStatus
2214 * typedef enum { ... } SilcClientMonitorStatus;
2218 * File transmission session status types. These will indicate
2219 * the status of the file transmission session.
2224 SILC_CLIENT_FILE_MONITOR_KEY_AGREEMENT, /* In key agreemenet phase */
2225 SILC_CLIENT_FILE_MONITOR_SEND, /* Sending file */
2226 SILC_CLIENT_FILE_MONITOR_RECEIVE, /* Receiving file */
2227 SILC_CLIENT_FILE_MONITOR_GET,
2228 SILC_CLIENT_FILE_MONITOR_PUT,
2229 SILC_CLIENT_FILE_MONITOR_CLOSED, /* Session closed */
2230 SILC_CLIENT_FILE_MONITOR_ERROR, /* Error during session */
2231 } SilcClientMonitorStatus;
2234 /****d* silcclient/SilcClientAPI/SilcClientFileError
2238 * typedef enum { ... } SilcClientFileError;
2242 * File transmission error types. These types are returned by
2243 * some of the file transmission functions, and by the monitor
2244 * callback to indicate error.
2249 SILC_CLIENT_FILE_OK,
2250 SILC_CLIENT_FILE_ERROR,
2251 SILC_CLIENT_FILE_UNKNOWN_SESSION,
2252 SILC_CLIENT_FILE_ALREADY_STARTED,
2253 SILC_CLIENT_FILE_NO_SUCH_FILE,
2254 SILC_CLIENT_FILE_PERMISSION_DENIED,
2255 SILC_CLIENT_FILE_KEY_AGREEMENT_FAILED,
2256 } SilcClientFileError;
2259 /****f* silcclient/SilcClientAPI/SilcClientFileMonitor
2263 * typedef void (*SilcClientFileMonitor)(SilcClient client,
2264 * SilcClientConnection conn,
2265 * SilcClientMonitorStatus status,
2266 * SilcClientFileError error,
2267 * SilcUInt64 offset,
2268 * SilcUInt64 filesize,
2269 * SilcClientEntry client_entry,
2270 * SilcUInt32 session_id,
2271 * const char *filepath,
2276 * Monitor callback that is called during the file transmission to
2277 * monitor the transmission process. The `status' indicates the current
2278 * monitoring process. The `error' will indicate the error type
2279 * if `status' is SILC_CLIENT_FILE_MONITOR_ERROR. The `offset' is the
2280 * currently transmitted amount of total `filesize'. The `client_entry'
2281 * indicates the remote client, and the transmission session ID is the
2282 * `session_id'. The filename being transmitted is indicated by the
2286 typedef void (*SilcClientFileMonitor)(SilcClient client,
2287 SilcClientConnection conn,
2288 SilcClientMonitorStatus status,
2289 SilcClientFileError error,
2291 SilcUInt64 filesize,
2292 SilcClientEntry client_entry,
2293 SilcUInt32 session_id,
2294 const char *filepath,
2297 /****f* silcclient/SilcClientAPI/silc_client_file_send
2301 * SilcClientFileError
2302 * silc_client_file_send(SilcClient client,
2303 * SilcClientConnection conn,
2304 * SilcClientFileMonitor monitor,
2305 * void *monitor_context,
2306 * const char *local_ip,
2307 * SilcUInt32 local_port,
2309 * SilcClientEntry client_entry,
2310 * const char *filepath);
2311 * SilcUInt32 *session_id);
2315 * Sends a file indicated by the `filepath' to the remote client
2316 * indicated by the `client_entry'. This will negotiate a secret key
2317 * with the remote client before actually starting the transmission of
2318 * the file. The `monitor' callback will be called to monitor the
2319 * transmission of the file.
2321 * This returns a file session ID for the file transmission to the
2322 * `session_id' pointer. It can be used to close the session (and
2323 * abort the file transmission) by calling the silc_client_file_close
2324 * function. The session ID is also returned in the `monitor' callback.
2326 * If the `local_ip' is provided then this will try to bind the
2327 * listener for key exchange protocol to that IP. If `local_port' is
2328 * non-zero that port is used. If `local_ip' is NULL then this will
2329 * automatically attempt to bind it to local IP address of the machine.
2330 * If `do_not_bind' is TRUE then the `local_ip' and `local_port' are
2331 * ignored and it is expected that the receiver will provide the
2332 * point of contact. This is usefull if the sender is behind NAT.
2334 * If error will occur during the file transfer process the error
2335 * status will be returned in the monitor callback. In this case
2336 * the application must call silc_client_file_close to close the
2341 silc_client_file_send(SilcClient client,
2342 SilcClientConnection conn,
2343 SilcClientFileMonitor monitor,
2344 void *monitor_context,
2345 const char *local_ip,
2346 SilcUInt32 local_port,
2348 SilcClientEntry client_entry,
2349 const char *filepath,
2350 SilcUInt32 *session_id);
2352 /****f* silcclient/SilcClientAPI/silc_client_file_receive
2356 * SilcClientFileError
2357 * silc_client_file_receive(SilcClient client,
2358 * SilcClientConnection conn,
2359 * SilcClientFileMonitor monitor,
2360 * void *monitor_context,
2362 * SilcUInt32 session_id);
2366 * Receives a file from a client indicated by the `client_entry'. The
2367 * `session_id' indicates the file transmission session and it has been
2368 * received in the `ftp' client operation function. This will actually
2369 * perform the key agreement protocol with the remote client before
2370 * actually starting the file transmission. The `monitor' callback
2371 * will be called to monitor the transmission. If `path' is non NULL
2372 * the file will be saved into that directory. If NULL the file is
2373 * saved in the current working directory.
2375 * If error will occur during the file transfer process the error
2376 * status will be returned in the monitor callback. In this case
2377 * the application must call silc_client_file_close to close the
2382 silc_client_file_receive(SilcClient client,
2383 SilcClientConnection conn,
2384 SilcClientFileMonitor monitor,
2385 void *monitor_context,
2387 SilcUInt32 session_id);
2389 /****f* silcclient/SilcClientAPI/silc_client_file_close
2393 * SilcClientFileError silc_client_file_close(SilcClient client,
2394 * SilcClientConnection conn,
2395 * SilcUInt32 session_id);
2399 * Closes file transmission session indicated by the `session_id'.
2400 * If file transmission is being conducted it will be aborted
2401 * automatically. This function is also used to close the session
2402 * after successful file transmission. This function can be used
2403 * also to reject incoming file transmission request.
2406 SilcClientFileError silc_client_file_close(SilcClient client,
2407 SilcClientConnection conn,
2408 SilcUInt32 session_id);
2410 /****f* silcclient/SilcClientAPI/silc_client_attribute_add
2414 * SilcAttributePayload
2415 * silc_client_attribute_add(SilcClient client,
2416 * SilcClientConnection conn,
2417 * SilcAttribute attribute,
2419 * SilcUInt32 object_size);
2423 * Add new Requsted Attribute for WHOIS command to the client library.
2424 * The `attribute' object indicated by `object' is added and allocated
2425 * SilcAttributePayload is returned. The `object' must be of correct
2426 * type and of correct size. See the SilcAttribute for object types
2427 * for different attributes. You may also get all added attributes
2428 * from the client with silc_client_attributes_get function.
2430 * Requested Attributes are different personal information about the
2431 * user, status information and other information which other users
2432 * may query with WHOIS command. Application may set these so that
2433 * if someone sends WHOIS query these attributes will be replied back
2434 * to the sender. The library always puts the public key to the
2435 * Requested Attributes, but if application wishes to add additional
2436 * public keys (or certificates) it can be done with this interface.
2437 * Library also always computes digital signature of the attributes
2438 * automatically, so application does not need to do that.
2441 SilcAttributePayload silc_client_attribute_add(SilcClient client,
2442 SilcClientConnection conn,
2443 SilcAttribute attribute,
2445 SilcUInt32 object_size);
2447 /****f* silcclient/SilcClientAPI/silc_client_attribute_del
2451 * bool silc_client_attribute_del(SilcClient client,
2452 * SilcClientConnection conn,
2453 * SilcAttribute attribute,
2454 * SilcAttributePayload attr);
2458 * Delete a Requested Attribute from the client. If the `attribute'
2459 * is non-zero then all attributes of that type are deleted and the
2460 * `attr' is ignored. If `attr' is non-NULL then that specific
2461 * attribute is deleted and `attribute' is ignored.
2463 * You may get all added attributes with the function
2464 * silc_client_attributes_get and to get the SilcAttributePayload.
2465 * This function Returns TRUE if the attribute was found and deleted.
2468 bool silc_client_attribute_del(SilcClient client,
2469 SilcClientConnection conn,
2470 SilcAttribute attribute,
2471 SilcAttributePayload attr);
2473 /****f* silcclient/SilcClientAPI/silc_client_attributes_get
2477 * const SilcHashTable
2478 * silc_client_attributes_get(SilcClient client,
2479 * SilcClientConnection conn);
2483 * Returns pointer to the SilcHashTable which includes all the added
2484 * Requested Attributes. The caller must not free the hash table.
2485 * The caller may use SilcHashTableList and silc_hash_table_list to
2486 * traverse the table. Each entry in the hash table is one added
2487 * SilcAttributePayload. It is possible to delete a attribute
2488 * payload while traversing the table.
2491 const SilcHashTable silc_client_attributes_get(SilcClient client,
2492 SilcClientConnection conn);
2494 /****f* silcclient/SilcClientAPI/silc_client_attributes_request
2498 * SilcBuffer silc_client_attributes_request(SilcAttribute attribute, ...);
2502 * Constructs a Requested Attributes buffer. If the `attribute' is zero (0)
2503 * then all attributes are requested. Alternatively, `attribute' and
2504 * all variable arguments can each be requested attribute. In this case
2505 * the last must be set to zero (0) to complete the variable list of
2506 * requested attributes. See SilcAttribute for all attributes.
2507 * You can give the returned buffer as argument to for example
2508 * silc_client_get_client_by_id_resolve function.
2511 SilcBuffer silc_client_attributes_request(SilcAttribute attribute, ...);
2513 /* Low level packet sending functions */
2515 /****f* silcclient/SilcClientAPI/silc_client_send_packet
2519 * bool silc_client_send_packet(SilcClient client,
2520 * SilcClientConnection conn,
2521 * SilcPacketType type,
2522 * const unsigned char *data,
2523 * SilcUInt32 data_len);
2527 * This routine can be used by application to send packets directly
2528 * to a connection indicated by `conn'. Usually application does not
2529 * need this routine since the Client Library handles the packet
2530 * sending. The `type' indicates the packet type. If `data' is
2531 * NULL then empty packet is sent. This returns FALSE if packet cannot
2535 bool silc_client_send_packet(SilcClient client,
2536 SilcClientConnection conn,
2537 SilcPacketType type,
2538 const unsigned char *data,
2539 SilcUInt32 data_len);
2541 #include "command.h"
2542 #include "command_reply.h"
2544 #include "protocol.h"
2550 #endif /* SILCCLIENT_H */