5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 2000 - 2014 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 SilcConnectionType type; /* Connection type */
231 SilcClientConnectCallback callback; /* Connection callback */
232 void *callback_context; /* Connection context */
233 SilcClient client; /* Pointer back to SilcClient */
235 /* Current say() operation associated context, identifies the client,
236 channel or server the message is related to. Application can use
237 this information to target the message better. */
239 SilcClientEntry client_entry;
240 SilcChannelEntry channel_entry;
241 SilcServerEntry server_entry;
243 SilcIdType context_type; /* Defines which pointer is set
244 in the union. If SILC_ID_NONE
247 /* Application specific data. Application may set here whatever it wants. */
250 /* Internal data for client library. Application cannot access this. */
251 SilcClientConnectionInternal internal;
255 /****s* silcclient/SilcClientAPI/SilcChannelUser
259 * typedef struct SilcChannelUserStruct { ... } *SilcChannelUser
263 * This structure represents a client that has joined to a channel.
264 * It shows the client and the channel and the client's mode (channel
265 * user mode) on the channel.
269 struct SilcChannelUserStruct {
270 SilcClientEntry client; /* Client joined on channel */
271 SilcUInt32 mode; /* mode, ChannelUserModes */
272 SilcChannelEntry channel; /* The channel user has joined */
274 /* Application specific data. Application may set here whatever it wants. */
279 /****s* silcclient/SilcClientAPI/SilcClientStats
283 * typedef struct { ... } SilcClientStats;
287 * This structure holds SILC network statistics returned by the
288 * SILC_COMMAND_STATS command reply to the application.
292 typedef struct SilcClientStatsStruct {
293 SilcUInt32 starttime; /* SILC server start time */
294 SilcUInt32 uptime; /* SILC server uptime*/
295 SilcUInt32 my_clients; /* Number of clients in the server */
296 SilcUInt32 my_channels; /* Number of channel in the server */
297 SilcUInt32 my_server_ops; /* Number of server operators in the server */
298 SilcUInt32 my_router_ops; /* Number of router operators in the router */
299 SilcUInt32 cell_clients; /* Number of clients in the cell */
300 SilcUInt32 cell_channels; /* Number of channels in the cell */
301 SilcUInt32 cell_servers; /* Number of server in the cell */
302 SilcUInt32 clients; /* All clients in SILC network */
303 SilcUInt32 channels; /* All channels in SILC network */
304 SilcUInt32 servers; /* All servers in SILC network */
305 SilcUInt32 routers; /* All routers in SILC network */
306 SilcUInt32 server_ops; /* All server operators in SILC network */
307 SilcUInt32 router_ops; /* All router operators in SILC network */
311 /****d* silcclient/SilcClientAPI/SilcKeyAgreementStatus
315 * typedef enum { ... } SilcKeyAgreementStatus;
319 * Key agreement status types indicating the status of the key
320 * agreement protocol. These types are returned to the application
321 * in the SilcKeyAgreementCallback callback function.
326 SILC_KEY_AGREEMENT_OK, /* Everything is Ok */
327 SILC_KEY_AGREEMENT_ERROR, /* Unknown error occurred */
328 SILC_KEY_AGREEMENT_FAILURE, /* The protocol failed */
329 SILC_KEY_AGREEMENT_TIMEOUT, /* The protocol timeout */
330 SILC_KEY_AGREEMENT_ABORTED, /* The protocol aborted */
331 SILC_KEY_AGREEMENT_ALREADY_STARTED, /* Already started */
332 SILC_KEY_AGREEMENT_SELF_DENIED, /* Negotiationg with itself denied */
333 SILC_KEY_AGREEMENT_NO_MEMORY, /* System out of memory */
334 } SilcKeyAgreementStatus;
337 /****f* silcclient/SilcClientAPI/SilcKeyAgreementCallback
341 * typedef void (*SilcKeyAgreementCallback)(SilcClient client,
342 * SilcClientConnection conn,
343 * SilcClientEntry client_entry,
344 * SilcKeyAgreementStatus status,
345 * SilcSKEKeyMaterial *key,
350 * Key agreement callback that is called after the key agreement protocol
351 * has been performed. This is called also if error occurred during the
352 * key agreement protocol. The `key' is the allocated key material and
353 * the caller is responsible of freeing it. The `key' is NULL if error
354 * has occurred. The application can freely use the `key' to whatever
355 * purpose it needs. See lib/silcske/silcske.h for the definition of
356 * the SilcSKEKeyMaterial structure.
359 typedef void (*SilcKeyAgreementCallback)(SilcClient client,
360 SilcClientConnection conn,
361 SilcClientEntry client_entry,
362 SilcKeyAgreementStatus status,
363 SilcSKEKeyMaterial key,
366 /****s* silcclient/SilcClientAPI/SilcPrivateMessageKeys
370 * typedef struct { ... } SilcPrivateMessageKeys;
374 * Structure to hold the list of private message keys. The list of these
375 * structures is returned by the silc_client_list_private_message_keys
380 typedef struct SilcPrivateMessageKeysStruct {
381 SilcClientEntry client_entry; /* The remote client entry */
382 char *cipher; /* The cipher name */
383 unsigned char *key; /* The original key, If the appliation
384 provided it. This is NULL if
385 the SKE key material was used. */
386 SilcUInt32 key_len; /* The key length */
387 } *SilcPrivateMessageKeys;
390 /****s* silcclient/SilcClientAPI/SilcChannelPrivateKey
394 * typedef struct SilcChannelPrivateKeyStruct { ... }
395 * *SilcChannelPrivateKey;
399 * Structure to hold one channel private key. The array of this structure
400 * is returned by silc_client_list_channel_private_keys function.
404 struct SilcChannelPrivateKeyStruct {
405 char *name; /* Application given name */
406 SilcCipher send_key; /* The cipher and key */
407 SilcCipher receive_key; /* The cipher and key */
408 SilcHmac hmac; /* The HMAC and hmac key */
412 /****f* silcclient/SilcClientAPI/SilcAskPassphrase
416 * typedef void (*SilcAskPassphrase)(const unsigned char *passphrase,
417 * SilcUInt32 passphrase_len,
422 * Ask passphrase callback. This is called by the application when the
423 * library calls `ask_passphrase' client operation. The callback delivers
424 * the passphrase to the library. The passphrases in SILC protocol
425 * MUST be in UTF-8 encoding, therefore the `passphrase' SHOULD be UTF-8
426 * encoded, and if it is not then library will attempt to encode it.
429 typedef void (*SilcAskPassphrase)(const unsigned char *passphrase,
430 SilcUInt32 passphrase_len,
433 /****f* silcclient/SilcClientAPI/SilcVerifyPublicKey
437 * typedef void (*SilcVerifyPublicKey)(SilcBool success, void *context);
441 * Public key (or certificate) verification callback. This is called
442 * by the application to indicate that the public key verification was
443 * either success or failure.
446 typedef void (*SilcVerifyPublicKey)(SilcBool success, void *context);
448 /****f* silcclient/SilcClientAPI/SilcGetAuthMeth
452 * typedef void (*SilcGetAuthMeth)(SilcAuthMethod auth_meth,
453 * const void *auth, SilcUInt32 auth_len,
458 * Authentication data resolving callback. This is called by the
459 * application to return the resolved authentication data. The client
460 * library has called the get_auth_method client operation and given
461 * this function pointer as argument. The `auth_meth' is the selected
462 * authentication method. The `auth_data' and the `auth_data_len'
463 * are the resolved authentication data. The `context' is the libary's
464 * context sent to the get_auth_method client operation.
466 * If the `auth_method' is SILC_AUTH_PASSWORD then `auth' and `auth_len'
467 * is the passphrase and its length. If it is SILC_AUTH_PUBLIC_KEY the
468 * `auth' must be NULL. The library will use the private key given as
469 * argument to silc_client_connect_to_server, silc_client_connect_to_client
470 * or silc_client_key_exchange. If it is SILC_AUTH_NONE, both `auth' and
471 * `auth_len' are ignored.
474 typedef void (*SilcGetAuthMeth)(SilcAuthMethod auth_meth,
475 const void *auth, SilcUInt32 auth_len,
478 /****d* silcclient/SilcClientAPI/SilcClientMessageType
482 * typedef enum { ... } SilcClientMessageType;
486 * Different message types for `say' client operation. The application
487 * may filter the message sent by the library according this type.
492 SILC_CLIENT_MESSAGE_INFO, /* Informational */
493 SILC_CLIENT_MESSAGE_WARNING, /* Warning */
494 SILC_CLIENT_MESSAGE_ERROR, /* Error */
495 SILC_CLIENT_MESSAGE_COMMAND_ERROR, /* Error during command */
496 SILC_CLIENT_MESSAGE_AUDIT, /* Auditable */
497 } SilcClientMessageType;
500 /****s* silcclient/SilcClientAPI/SilcClientOperations
504 * typedef struct { ... } SilcClientOperations;
508 * SILC Client Operations. These must be implemented by the application.
509 * The Client library may call any of these routines at any time. The
510 * routines are used to deliver certain information to the application
511 * or from the application to the client library.
515 typedef struct SilcClientOperationsStruct {
516 /* Message sent to the application by library. `conn' associates the
517 message to a specific connection. `conn', however, may be NULL.
518 The `type' indicates the type of the message sent by the library.
519 The application can for example filter the message according the
520 type. The variable argument list is arguments to the formatted
521 message `msg'. A SilcClientEntry, SilcChannelEntry or SilcServerEntry
522 can be associated with the message inside the `conn' by the library,
523 and application may use it to better target the message. */
524 void (*say)(SilcClient client, SilcClientConnection conn,
525 SilcClientMessageType type, char *msg, ...);
527 /* Message for a channel. The `sender' is the sender of the message
528 The `channel' is the channel. The `message' is the message. Note
529 that `message' maybe NULL. The `flags' indicates message flags
530 and it is used to determine how the message can be interpreted
531 (like it may tell the message is multimedia message). The `payload'
532 may be used to retrieve all the details of the message. */
533 void (*channel_message)(SilcClient client, SilcClientConnection conn,
534 SilcClientEntry sender, SilcChannelEntry channel,
535 SilcMessagePayload payload,
536 SilcChannelPrivateKey key, SilcMessageFlags flags,
537 const unsigned char *message,
538 SilcUInt32 message_len);
540 /* Private message to the client. The `sender' is the sender of the
541 message. The message is `message'and maybe NULL. The `flags'
542 indicates message flags and it is used to determine how the message
543 can be interpreted (like it may tell the message is multimedia
544 message). The `payload' may be used to retrieve all the details of
546 void (*private_message)(SilcClient client, SilcClientConnection conn,
547 SilcClientEntry sender, SilcMessagePayload payload,
548 SilcMessageFlags flags, const unsigned char *message,
549 SilcUInt32 message_len);
551 /* Notify message to the client. The arguments are notify `type' specific.
552 See separate documentation in the Toolkit Reference Manual for the notify
554 void (*notify)(SilcClient client, SilcClientConnection conn,
555 SilcNotifyType type, ...);
557 /* Command handler. This function is called always after application has
558 called a command. It will be called to indicate that the command
559 was processed. It will also be called if error occurs while processing
560 the command. The `success' indicates whether the command was sent
561 or if error occurred. The `status' indicates the actual error.
562 The `argc' and `argv' are the command line arguments sent to the
563 command by application. Note that, this is not reply to the command
564 from server, this is merely and indication to application that the
565 command was processed. */
566 void (*command)(SilcClient client, SilcClientConnection conn,
567 SilcBool success, SilcCommand command, SilcStatus status,
568 SilcUInt32 argc, unsigned char **argv);
570 /* Command reply handler. Delivers a reply to command that was sent
571 earlier. The `conn' is the associated client connection. The `command'
572 indicates the command reply type. If the `status' other than
573 SILC_STATUS_OK an error occurred. In this case the `error' will indicate
574 the error. It is possible to receive list of command replies and list
575 of errors. In this case the `status' will indicate it is an list entry
576 (the `status' is SILC_STATUS_LIST_START, SILC_STATUS_LIST_ITEM and/or
577 SILC_STATUS_LIST_END).
579 The arguments received in `ap' are command specific. See a separate
580 documentation in the Toolkit Reference Manual for the command reply
582 void (*command_reply)(SilcClient client, SilcClientConnection conn,
583 SilcCommand command, SilcStatus status,
584 SilcStatus error, va_list ap);
586 /* Find authentication method and authentication data by hostname and
587 port. The hostname may be IP address as well. The `auth_method' is
588 the authentication method the remote connection requires. It is
589 however possible that remote accepts also some other authentication
590 method. Application should use the method that may have been
591 configured for this connection. If none has been configured it should
592 use the required `auth_method'. If the `auth_method' is
593 SILC_AUTH_NONE, server does not require any authentication or the
594 required authentication method is not known. The `completion'
595 callback must be called to deliver the chosen authentication method
596 and data. The `conn' may be NULL. */
597 void (*get_auth_method)(SilcClient client, SilcClientConnection conn,
598 char *hostname, SilcUInt16 port,
599 SilcAuthMethod auth_method,
600 SilcGetAuthMeth completion, void *context);
602 /* Called to verify received public key. The `conn_type' indicates which
603 entity (server or client) has sent the public key. If user decides to
604 trust the key the application may save the key as trusted public key for
605 later use. The `completion' must be called after the public key has
607 void (*verify_public_key)(SilcClient client, SilcClientConnection conn,
608 SilcConnectionType conn_type,
609 SilcPublicKey public_key,
610 SilcVerifyPublicKey completion, void *context);
612 /* Ask from end user a passphrase or a password. The passphrase is
613 returned to the library by calling the `completion' callback with
614 the `context'. The returned passphrase SHOULD be in UTF-8 encoded,
615 if not then the library will attempt to encode. */
616 void (*ask_passphrase)(SilcClient client, SilcClientConnection conn,
617 SilcAskPassphrase completion, void *context);
619 /* Called to indicate that incoming key agreement request has been
620 received. If the application wants to perform key agreement it may
621 call silc_client_perform_key_agreement to initiate key agreement or
622 silc_client_send_key_agreement to provide connection point to the
623 remote client in case the `hostname' is NULL. If key agreement is
624 not desired this request can be ignored. The `protocol' is either
625 value 0 for TCP or value 1 for UDP. */
626 void (*key_agreement)(SilcClient client, SilcClientConnection conn,
627 SilcClientEntry client_entry,
628 const char *hostname, SilcUInt16 protocol,
631 /* Notifies application that file transfer protocol session is being
632 requested by the remote client indicated by the `client_entry' from
633 the `hostname' and `port'. The `session_id' is the file transfer
634 session and it can be used to either accept or reject the file
635 transfer request, by calling the silc_client_file_receive or
636 silc_client_file_close, respectively. */
637 void (*ftp)(SilcClient client, SilcClientConnection conn,
638 SilcClientEntry client_entry, SilcUInt32 session_id,
639 const char *hostname, SilcUInt16 port);
640 } SilcClientOperations;
643 /****s* silcclient/SilcClientAPI/SilcClientParams
647 * typedef struct { ... } SilcClientParams;
651 * Client parameters. This can be filled with proper values and
652 * given as argument to the silc_client_alloc function. The structure
653 * hold various parameters which affects the function of the client.
657 typedef struct SilcClientParamsStruct {
658 /* If this boolean is set to TRUE then the client library will use
659 threads. Any of the callback functions in the SilcClientOperations
660 and other callbacks may be called at any time in a thread. The
661 application may need to employ appropriate concurrency control
662 in the callbacks to protect application specific data. */
665 /* Nickname format string. This can be used to order the client library
666 to save the nicknames in the library in a certain format. Since
667 nicknames are not unique in SILC it is possible to have multiple same
668 nicknames. Using this format string it is possible to order the library
669 to separate the multiple same nicknames from each other. If this is
670 empty then default format is used which is the default nickname
671 without anything else. The string MUST be NULL terminated.
673 Following format types are available:
675 %n nickname - the real nickname returned by the server (mandatory)
676 %a number - ascending number in case there are several
677 same nicknames (fe. nick#2 and nick#3)
678 %h hostname - the stripped hostname of the client
679 %H full hostname - the full hostname of the client
681 Example format strings: "%n#%a" (fe. nick#2, nick#3)
682 "%n#%h%a" (fe. nick#host, nick#host2)
683 "%a!%n#%h" (fe. nick#host, 2!nick#host)
685 Note that there must always be some separator characters around '%n'
686 format. It is not possible to put format characters before or after
687 '%n' without separators (such ash '#'). Also note that the separator
688 character should be a character that cannot be part of normal nickname.
689 Note that, using '@' as a separator is not recommended as the nickname
690 string may contain it to separate a server name from the nickname (eg.
691 nickname@silcnet.org).
693 char nickname_format[32];
695 /* If this is set to TRUE then the `nickname_format' is employed to all
696 saved nicknames even if there are no multiple same nicknames in the
697 cache. By default this is FALSE, which means that the `nickname_format'
698 is employed only if the library will receive a nickname that is
699 already saved in the cache. It is recommended to leave this to FALSE
701 SilcBool nickname_force_format;
703 /* If this is set to TRUE then all nickname strings returned by the library
704 and stored by the library are in the format of 'nickname@server', eg.
705 nickname@silcnet.org. If this is FALSE then the server name of the
706 nickname is available only from the SilcClientEntry structure. When this
707 is TRUE the server name is still parsed to SilcClientEntry. */
708 SilcBool full_nicknames;
710 /* If this is set to TRUE then all channel name strings returned by the
711 library and stored by the library are in the format of 'channel@server',
712 eg. silc@silcnet.org. If this is FALSE then the server name of the
713 channel is available only from the SilcChannelEntry structure. When this
714 is TRUE the server name is still parsed to SilcChannelEntry. Note that,
715 not all SILC server versions return such channel name strings. */
716 SilcBool full_channel_names;
718 /* If this is set to TRUE, the silcclient library will not register and
719 deregister the cipher, pkcs, hash and hmac algorithms. The application
720 itself will need to handle that. */
721 SilcBool dont_register_crypto_library;
723 /* If this is set to TRUE, the silcclient library will not automatically
724 negotiate private message keys using SKE over the SILC network but will
725 use normal session keys to protect private messages. */
726 SilcBool dont_autoneg_prvmsg_keys;
731 /* Initialization functions (client.c) */
733 /****f* silcclient/SilcClientAPI/silc_client_alloc
737 * SilcClient silc_client_alloc(SilcClientOperations *ops,
738 * SilcClientParams *params,
740 * const char *silc_version);
744 * Allocates new client object. This has to be done before client may
745 * work. After calling this one must call silc_client_init to initialize
746 * the client. The `application' is application specific user data pointer
747 * and caller must free it. The `silc_version' is the application version
748 * that will be used to compare against remote host's (usually a server)
749 * version string. The `application' context is accessible by the
750 * application by client->application, client being SilcClient.
753 SilcClient silc_client_alloc(SilcClientOperations *ops,
754 SilcClientParams *params,
756 const char *version_string);
758 /****f* silcclient/SilcClientAPI/silc_client_free
762 * void silc_client_free(SilcClient client);
766 * Frees client object and its internals. The execution of the client
767 * should be stopped with silc_client_stop function before calling
771 void silc_client_free(SilcClient client);
773 /****f* silcclient/SilcClientAPI/silc_client_init
777 * SilcBool silc_client_init(SilcClient client, const char *username,
778 * const char *hostname, const char *realname,
779 * SilcClientRunning running, void *context);
783 * Initializes the client. This makes all the necessary steps to make
784 * the client ready to be run. One must call silc_client_run to run the
785 * client. Returns FALSE if error occurred, TRUE otherwise.
787 * The `username' and `hostname' strings must be given and they must be
788 * UTF-8 encoded. The `username' is the client's username in the
789 * operating system, `hostname' is the client's host name and the
790 * `realname' is the user's real name.
792 * The `running' callback with `context' is called after the client is
793 * running after silc_client_run or silc_client_run_one has been called.
794 * Application may start using the Client library API after that. Setting
795 * the callback is optional, but highly recommended.
798 SilcBool silc_client_init(SilcClient client, const char *username,
799 const char *hostname, const char *realname,
800 SilcClientRunning running, void *context);
802 /****f* silcclient/SilcClientAPI/silc_client_run
806 * void silc_client_run(SilcClient client);
810 * Runs the client. This starts the scheduler from the utility library.
811 * When this functions returns the execution of the application is over.
812 * The client must be initialized before calling this.
815 void silc_client_run(SilcClient client);
817 /****f* silcclient/SilcClientAPI/silc_client_run_one
821 * void silc_client_run_one(SilcClient client);
825 * Runs the client and returns immeadiately. This function is used when
826 * the SILC Client object indicated by the `client' is run under some
827 * other scheduler, or event loop or main loop. On GUI applications,
828 * for example this may be desired to used to run the client under the
829 * GUI application's main loop. Typically the GUI application would
830 * register an idle task that calls this function multiple times in
831 * a second to quickly process the SILC specific data.
834 void silc_client_run_one(SilcClient client);
836 /****f* silcclient/SilcClientAPI/silc_client_stop
840 * void silc_client_stop(SilcClient client, SilcClientStopped stopped,
845 * Stops the client. This is called to stop the client and thus to stop
846 * the program. The client context must be freed with the silc_client_free
847 * function. All connections that exist in this client must be closed
848 * before calling this function. Connections can be closed by calling
849 * silc_client_close_connection.
851 * The `stopped' will be called once the client and all connections have
852 * finished. The client may be freed after that. Note that the `stopped'
853 * won't be called before all connections have finished. Setting the
854 * callback is optional.
857 void silc_client_stop(SilcClient client, SilcClientStopped stopped,
860 /* Connecting functions */
862 /****s* silcclient/SilcClientAPI/SilcClientConnectionParams
866 * typedef struct { ... } SilcClientConnectionParams;
870 * Client connection parameters. This can be filled by the application
871 * and given as argument to silc_client_connect_to_server,
872 * silc_client_connect_to_client, silc_client_key_exchange or
873 * silc_client_send_key_agreement.
877 typedef struct SilcClientConnectionParamsStruct {
878 /* If this is provided the user's nickname in the network will be the
879 string given here. If it is given, it must be UTF-8 encoded. If this
880 string is not given, the user's username by default is used as nickname.
881 The nickname may later be changed by using NICK command. The maximum
882 length for the nickname string is 128 bytes. */
885 /* If this key repository pointer is non-NULL then public key received in
886 the key exchange protocol will be verified from this repository. If
887 this is not provided then the `verify_public_key' client operation will
888 be called back to application. If the boolean `verify_notfound' is set
889 to TRUE then the `verify_public_key' client operation will be called
890 in case the public key is not found in `repository'. Only public keys
891 added with at least SILC_SKR_USAGE_KEY_AGREEMENT in the repository will
892 be checked, other keys will be ignored. */
894 SilcBool verify_notfound;
896 /* Authentication data. Application may set here the authentication data
897 and authentication method to be used in connecting. If `auth_set'
898 boolean is TRUE then authentication data is provided by application.
899 If the authentication method is public key authentication then the key
900 pair given as argument when connecting will be used and `auth' field
901 is NULL. If it is passphrase authentication, it can be provided in
902 `auth' and `auth_len' fields. If `auth_set' is FALSE
903 the `get_auth_method' client operation will be called to get the
904 authentication method and data from application. */
906 SilcAuthMethod auth_method;
910 /* If this boolean is set to TRUE then the connection will use UDP instead
911 of TCP. If UDP is set then also the next `local_ip' and `local_port'
915 /* The `local_ip' specifies the local IP address used with the connection.
916 It must be non-NULL if `udp' boolean is TRUE. If the `local_port' is
917 non-zero it will be used as local port with UDP connection. The remote
918 host will also send packets to the specified address and port. If the
919 `bind_ip' is non-NULL a listener is bound to that address instead of
925 /* If this boolean is set to TRUE then the key exchange is done with
926 perfect forward secrecy. */
929 /* If this boolean is set to TRUE then connection authentication protocol
930 is not performed during connecting. Only key exchange protocol is
931 performed. This usually must be set to TRUE when connecting to another
932 client, but must be FALSE with server connections. */
933 SilcBool no_authentication;
935 /* The SILC session detachment data that was returned in the `command_reply'
936 client operation for SILC_COMMAND_DETACH command. If this is provided
937 here the client library will attempt to resume the session in the network.
938 After the connection is created and the session has been resumed the
939 client will receive SILC_COMMAND_NICK command_reply for the client's
940 nickname in the network and SILC_COMMAND_JOIN command reply for all the
941 channels that the client has joined in the network. It may also receive
942 SILC_COMMAND_UMODE command reply to set user's mode on the network. */
943 unsigned char *detach_data;
944 SilcUInt32 detach_data_len;
946 /* Connection timeout. If non-zero, the connection will timeout unless
947 the SILC connection is completed in the specified amount of time. */
948 SilcUInt32 timeout_secs;
950 /* Rekey timeout in seconds. The client will perform rekey in this
951 time interval. If set to zero, the default value will be used
952 (3600 seconds, 1 hour). */
953 SilcUInt32 rekey_secs;
955 /* If this is set to TRUE then the client will ignore all incoming
956 Requested Attributes queries and does not reply anything back. This
957 usually leads into situation where server does not anymore send
958 the queries after seeing that client does not reply anything back.
959 If your application does not support Requested Attributes or you do
960 not want to use them set this to TRUE. See SilcAttribute and
961 silc_client_attribute_add for more information on attributes. */
962 SilcBool ignore_requested_attributes;
964 /* User context for SilcClientConnection. If non-NULL this context is
965 set to the 'context' field in SilcClientConnection when the connection
966 context is created. */
968 } SilcClientConnectionParams;
971 /****f* silcclient/SilcClientAPI/silc_client_connect_to_server
976 * silc_client_connect_to_server(SilcClient client,
977 * SilcClientConnectionParams *params,
978 * SilcPublicKey public_key,
979 * SilcPrivateKey private_key,
980 * char *remote_host, int port,
981 * SilcClientConnectCallback callback,
986 * Connects to remote server `remote_host' at port `port'. This function
987 * can be used to create connection to remote SILC server and start
988 * SILC session in the SILC network. The `params' may be provided
989 * to provide various connection parameters. The `public_key' and the
990 * `private_key' is your identity used in this connection. When
991 * authentication method is based on digital signatures, this key pair
992 * will be used. The `callback' with `context' will be called after the
993 * connection has been created. It will also be called later when remote
996 * If application wishes to create the network connection itself, use
997 * the silc_client_key_exchange after creating the connection to start
998 * key exchange and authentication with the server.
1000 * Returns SilcAsyncOperation which can be used to cancel the connecting,
1001 * or NULL on error. Note that the returned pointer becomes invalid
1002 * after the `callback' is called.
1006 silc_client_connect_to_server(SilcClient client,
1007 SilcClientConnectionParams *params,
1008 SilcPublicKey public_key,
1009 SilcPrivateKey private_key,
1010 char *remote_host, int port,
1011 SilcClientConnectCallback callback,
1014 /****f* silcclient/SilcClientAPI/silc_client_connect_to_client
1018 * SilcAsyncOperation
1019 * silc_client_connect_to_client(SilcClient client,
1020 * SilcClientConnectionParams *params,
1021 * SilcPublicKey public_key,
1022 * SilcPrivateKey private_key,
1023 * char *remote_host, int port,
1024 * SilcClientConnectCallback callback,
1029 * Connects to remote client `remote_host' at port `port'. This function
1030 * can be used to create peer-to-peer connection to another SILC client,
1031 * for example, for direct conferencing, or file transfer or for other
1032 * purposes. The `params' may be provided to provide various connection
1033 * parameters. The `public_key' and the `private_key' is your identity
1034 * used in this connection. The `callback' with `context' will be called
1035 * after the connection has been created. It will also be called later
1036 * when remote host disconnects.
1038 * If application wishes to create the network connection itself, use
1039 * the silc_client_key_exchange after creating the connection to start
1040 * key exchange with the client.
1042 * Returns SilcAsyncOperation which can be used to cancel the connecting,
1043 * or NULL on error. Note that the returned pointer becomes invalid
1044 * after the `callback' is called.
1048 silc_client_connect_to_client(SilcClient client,
1049 SilcClientConnectionParams *params,
1050 SilcPublicKey public_key,
1051 SilcPrivateKey private_key,
1052 char *remote_host, int port,
1053 SilcClientConnectCallback callback,
1056 /****f* silcclient/SilcClientAPI/silc_client_key_exchange
1060 * SilcAsyncOperation
1061 * silc_client_key_exchange(SilcClient client,
1062 * SilcClientConnectionParams *params,
1063 * SilcPublicKey public_key,
1064 * SilcPrivateKey private_key,
1065 * SilcStream stream,
1066 * SilcConnectionType conn_type,
1067 * SilcClientConnectCallback callback,
1072 * Starts key exchange protocol and authentication protocol in the
1073 * connection indicated by `stream'. This function can be be used to
1074 * start SILC session with remote host (usually server) when the caller
1075 * has itself created the connection, instead of calling the function
1076 * silc_client_connect_to_server or silc_client_connect_to_client. If
1077 * one of those functions was used this function must not be called as
1078 * in that case the key exchange is performed automatically.
1080 * Use this function only if you have created the connection by yourself.
1081 * After creating the connection the socket must be wrapped into a
1082 * socket stream. See silcsocketstream.h for more information. Note that
1083 * the `stream' must have valid remote IP address (and optionally also
1084 * hostname) and port set.
1086 * The `params' may be provided to provide various connection parameters.
1087 * The `public_key' and the `private_key' is your identity used in this
1088 * session. The `callback' with `context' will be called after the session
1089 * has been set up. It will also be called later when remote host
1090 * disconnects. The `conn_type' is the type of session this is going to
1091 * be. If the remote is SILC server it is SILC_CONN_SERVER or if it is
1092 * SILC client it is SILC_CONN_CLIENT.
1094 * Returns SilcAsyncOperation which can be used to cancel the connecting,
1095 * or NULL on error. Note that the returned pointer becomes invalid
1096 * after the `callback' is called.
1102 * // Create remote connection stream. Resolve hostname and IP also.
1103 * sock = create_connection(remote_host, port);
1104 * silc_socket_tcp_stream_create(sock, TRUE, FALSE, schedule,
1105 * stream_create_cb, app);
1107 * // Stream callback delivers our new SilcStream context
1108 * void stream_create_cb(SilcSocketStreamStatus status, SilcStream stream,
1112 * if (status != SILC_SOCKET_OK)
1115 * // Start key exchange
1116 * silc_client_key_exchange(client, NULL, public_key, private_key,
1117 * stream, SILC_CONN_SERVER, connection_cb, app);
1123 silc_client_key_exchange(SilcClient client,
1124 SilcClientConnectionParams *params,
1125 SilcPublicKey public_key,
1126 SilcPrivateKey private_key,
1128 SilcConnectionType conn_type,
1129 SilcClientConnectCallback callback,
1132 /****f* silcclient/SilcClientAPI/silc_client_close_connection
1136 * void silc_client_close_connection(SilcClient client,
1137 * SilcClientConnection conn);
1141 * Closes the remote connection `conn'. The `conn' will become invalid
1142 * after this call. Usually this function is called only when explicitly
1143 * closing connection for example in case of error, or when the remote
1144 * connection was created by the application or when the remote is client
1145 * connection. Server connections are usually closed by sending QUIT
1146 * command to the server. However, this call may also be used.
1149 void silc_client_close_connection(SilcClient client,
1150 SilcClientConnection conn);
1152 /* Message sending functions */
1154 /****f* silcclient/SilcClientAPI/silc_client_send_channel_message
1158 * SilcBool silc_client_send_channel_message(SilcClient client,
1159 * SilcClientConnection conn,
1160 * SilcChannelEntry channel,
1161 * SilcChannelPrivateKey key,
1162 * SilcMessageFlags flags,
1164 * unsigned char *data,
1165 * SilcUInt32 data_len);
1169 * Sends encrypted message to the `channel'. The plaintext message is
1170 * the `data' of `data_len' bytes in length.
1172 * If `key' is provided then that private channel message key is used to
1173 * encrypt the message. If it is not provided and the `channel' does not
1174 * have SILC_CHANNEL_MODE_PRIVKEY set, the curent channel key is used
1175 * instead. If the mode is set but `key' is NULL the key that was added
1176 * first as private channel message key will be used.
1178 * If the `flags' includes SILC_MESSAGE_FLAG_SIGNED the message will be
1179 * digitally signed with the SILC key pair associated with the `conn'.
1180 * In this case the `hash' pointer must be provided as well.
1182 * Returns TRUE if the message was sent, and FALSE if error occurred or
1183 * the sending is not allowed due to channel modes (like sending is
1184 * blocked). This function is thread safe and channel messages can be
1185 * sent from multiple threads.
1188 SilcBool silc_client_send_channel_message(SilcClient client,
1189 SilcClientConnection conn,
1190 SilcChannelEntry channel,
1191 SilcChannelPrivateKey key,
1192 SilcMessageFlags flags,
1194 unsigned char *data,
1195 SilcUInt32 data_len);
1197 /****f* silcclient/SilcClientAPI/silc_client_send_private_message
1201 * SilcBool silc_client_send_private_message(SilcClient client,
1202 * SilcClientConnection conn,
1203 * SilcClientEntry client_entry,
1204 * SilcMessageFlags flags,
1206 * unsigned char *data,
1207 * SilcUInt32 data_len);
1211 * Sends private message to remote client. If private message key has
1212 * not been set with this client then the message will be encrypted using
1213 * the session keys used in `conn' connection. If the `flags' includes
1214 * SILC_MESSAGE_FLAG_SIGNED the message will be digitally signed with the
1215 * SILC key pair associated with `conn'. In this case the caller must also
1216 * provide the `hash' pointer.
1218 * Returns TRUE if the message was sent, and FALSE if error occurred.
1219 * This function is thread safe and private messages can be sent from
1223 SilcBool silc_client_send_private_message(SilcClient client,
1224 SilcClientConnection conn,
1225 SilcClientEntry client_entry,
1226 SilcMessageFlags flags,
1228 unsigned char *data,
1229 SilcUInt32 data_len);
1231 /****f* silcclient/SilcClientAPI/silc_client_private_message_wait_init
1236 * silc_client_private_message_wait_init(SilcClient client,
1237 * SilcClientConnection conn,
1238 * SilcClientEntry client_entry);
1242 * Initializes private message waiting functionality for the client
1243 * indicated by `client_entry'. Once this is called private message
1244 * from remote connection indicated by `conn' for `client_entry' may
1245 * be waiter for, for example in a thread. The function
1246 * silc_client_private_message_wait is used to block the current thread
1247 * until a private message is received from a specified client entry.
1248 * Return FALSE in case an internal error occurred.
1251 SilcBool silc_client_private_message_wait_init(SilcClient client,
1252 SilcClientConnection conn,
1253 SilcClientEntry client_entry);
1255 /****f* silcclient/SilcClientAPI/silc_client_private_message_wait_uninit
1260 * silc_client_private_message_wait_uninit(SilcClient client,
1261 * SilcClientConnection conn,
1262 * SilcClientEntry client_entry);
1266 * Unintializes private message waiting for client indicated by
1267 * `client_entry'. After this call private message cannot be waited
1268 * anymore and silc_client_private_message_wait will return with FALSE
1272 void silc_client_private_message_wait_uninit(SilcClient client,
1273 SilcClientConnection conn,
1274 SilcClientEntry client_entry);
1276 /****f* silcclient/SilcClientAPI/silc_client_private_message_wait
1281 * silc_client_private_message_wait(SilcClient client,
1282 * SilcClientConnection conn,
1283 * SilcClientEntry client_entry,
1284 * SilcMessagePayload *payload);
1288 * Blocks current thread or process until a private message has been
1289 * received from the remote client indicated by `client_entry'. Before
1290 * private messages can be waited the silc_client_private_message_wait_init
1291 * must be called. This function can be used from a thread to wait for
1292 * private message from the specified client. Multiple threads can be
1293 * created to wait messages from multiple clients. Any other private
1294 * message received from the connection indicated by `conn' will be
1295 * forwarded to the normal `private_message' client operation callback.
1296 * The private messages from `client_entry' will not be delivered to the
1297 * `private_message' client operation callback.
1299 * Returns TRUE and the received private message into `payload'. The caller
1300 * must free the returned SilcMessagePayload. If this function returns
1301 * FALSE the private messages cannot be waited anymore. This happens
1302 * when some other thread calls silc_client_private_message_wait_uninit.
1303 * This returns FALSE also if silc_client_private_message_wait_init has
1307 SilcBool silc_client_private_message_wait(SilcClient client,
1308 SilcClientConnection conn,
1309 SilcClientEntry client_entry,
1310 SilcMessagePayload *payload);
1312 /****f* silcclient/SilcClientAPI/silc_client_on_channel
1316 * SilcChannelUser silc_client_on_channel(SilcChannelEntry channel,
1317 * SilcClientEntry client_entry);
1321 * Returns the SilcChannelUser entry if the `client_entry' is joined on the
1322 * channel indicated by the `channel'. NULL if client is not joined on
1326 SilcChannelUser silc_client_on_channel(SilcChannelEntry channel,
1327 SilcClientEntry client_entry);
1330 /* Command management */
1332 /****f* silcclient/SilcClientAPI/silc_client_command_call
1336 * SilcUInt16 silc_client_command_call(SilcClient client,
1337 * SilcClientConnection conn,
1338 * const char *command_line, ...);
1342 * Calls and executes the command indicated by the `command_name'.
1343 * The `command_line' is a string which includes the command's name and
1344 * its arguments separated with whitespaces (' '). If `command_line'
1345 * is non-NULL then all variable arguments are ignored by default.
1347 * If `command_line' is NULL, then the variable arguments define the
1348 * command's name and its arguments. The first variable argument must
1349 * be the command name. The variable argument list must be terminated
1352 * Returns command identifier for this sent command. It can be used
1353 * to additionally attach to the command reply using the function
1354 * silc_client_command_pending, if needed. Returns 0 on error.
1356 * The `command' client operation callback will be called when the
1357 * command is executed to indicate whether or not the command executed
1360 * The `command_reply' client operation callbak will be called when reply
1361 * is received from the server to the command. Application may also use
1362 * the silc_client_command_pending to attach to the command reply.
1363 * The command identifier for silc_client_command_pending function after
1364 * this function call is conn->cmd_ident, which application may use.
1368 * silc_client_command_call(client, conn, NULL, "PING", "silc.silcnet.org",
1370 * silc_client_command_call(client, conn, "PING silc.silcnet.org");
1374 * This command executes the commands implemented inside the client
1375 * library. These commands are designed for command line applications,
1376 * but GUI application may call them too if needed. Alternatively
1377 * application may override the library and use silc_client_command_send
1381 SilcUInt16 silc_client_command_call(SilcClient client,
1382 SilcClientConnection conn,
1383 const char *command_line, ...);
1385 /****f* silcclient/SilcClientAPI/SilcClientCommandReply
1389 * typedef SilcBool (*SilcClientCommandReply)(SilcClient client,
1390 * SilcClientConnection conn,
1391 * SilcCommand command,
1392 * SilcStatus status,
1399 * The command reply callback function given as argument to functions
1400 * silc_client_command_send and silc_client_command_pending. This is
1401 * called to deliver the command replies to the caller. Each command
1402 * reply received from the server to the `command' will be delivered
1403 * separately to the caller by calling this callback. The `status' will
1404 * indicate whether there is only one reply or multiple replies. The
1405 * `error' will indicate if an error occurred. The `ap' will include
1406 * command reply arguments. They are the same arguments as for
1407 * `command_reply' client operation callback in SilcClientOperations.
1409 * If `status' is SILC_STATUS_OK only one reply was received and error
1410 * did not occur. If it is SILC_STATUS_LIST_START, SILC_STATUS_LIST_ITEM
1411 * or SILC_STATUS_LIST_END, there are will be two or more replies. The
1412 * first reply is SILC_STATUS_LIST_START and last one SILC_STATUS_LIST_END.
1414 * If FALSE is returned in this function this callback will not be called
1415 * again for `command' even if there are more comand replies. By returning
1416 * FALSE the caller my stop the command reply handling when needed.
1419 typedef SilcBool (*SilcClientCommandReply)(SilcClient client,
1420 SilcClientConnection conn,
1421 SilcCommand command,
1427 /****f* silcclient/SilcClientAPI/silc_client_command_send
1431 * SilcUInt16 silc_client_command_send(SilcClient client,
1432 * SilcClientConnection conn,
1433 * SilcCommand command,
1434 * SilcClientCommandReply reply,
1435 * void *reply_context,
1436 * SilcUInt32 argc, ...);
1440 * Generic function to send any command. The arguments must be given
1441 * already encoded into correct format and in correct order. If application
1442 * wants to perform the commands by itself, it can do so and send the data
1443 * directly to the server using this function. If application is using
1444 * the silc_client_command_call, this function is usually not used.
1445 * Programmer should get familiar with the SILC protocol commands
1446 * specification when using this function, as the arguments needs to
1447 * be encoded as specified in the protocol.
1449 * The variable arguments are a set of { type, data, data_length },
1450 * and the `argc' is the number of these sets.
1452 * The `reply' callback must be provided, and it is called when the
1453 * command reply is received from the server. Note that, when using this
1454 * function the default `command_reply' client operation callback will not
1455 * be called when reply is received.
1457 * Returns command identifier for this sent command. It can be used
1458 * to additionally attach to the command reply using the function
1459 * silc_client_command_pending, if needed. Returns 0 on error.
1463 * silc_client_command_send(client, conn, SILC_COMMAND_WHOIS,
1464 * my_whois_command_reply, cmd_ctx,
1465 * 1, 1, nickname, strlen(nickname));
1468 SilcUInt16 silc_client_command_send(SilcClient client,
1469 SilcClientConnection conn,
1470 SilcCommand command,
1471 SilcClientCommandReply reply,
1472 void *reply_context,
1473 SilcUInt32 argc, ...);
1475 /****f* silcclient/SilcClientAPI/silc_client_command_pending
1479 * void silc_client_command_pending(SilcClientConnection conn,
1480 * SilcCommand command,
1481 * SilcUInt16 cmd_ident,
1482 * SilcClientCommandReply reply,
1487 * This function can be used to add pending command callback to be
1488 * called when an command reply is received to an earlier sent command.
1489 * The `command' is the command that must be received in order for
1490 * the pending command callback indicated by `callback' to be called.
1492 * The `cmd_ident' is a command identifier which was set for the earlier
1493 * sent command. The command reply will include the same identifier
1494 * and pending command callback will be called when the reply is
1495 * received with the same command identifier. It is possible to
1496 * add multiple pending command callbacks for same command and for
1499 * Application may use this function to add its own command reply
1500 * handlers if it wishes not to use the standard `command_reply'
1503 * Note also that the application is notified about the received command
1504 * reply through the `command_reply' client operation before calling
1505 * the `callback` pending command callback. That is the normal
1506 * command reply handling, and is called regardless whether pending
1507 * command callbacks are used or not.
1511 * SilcUInt16 cmd_ident;
1512 * cmd_ident = silc_client_command_call(client, conn,
1513 * "PING silc.silcnet.org");
1514 * silc_client_command_pending(conn, SILC_COMMAND_PING, cmd_ident,
1515 * my_ping_handler, my_ping_context);
1518 SilcBool silc_client_command_pending(SilcClientConnection conn,
1519 SilcCommand command,
1520 SilcUInt16 cmd_ident,
1521 SilcClientCommandReply reply,
1525 /* Private Message key management */
1527 /****f* silcclient/SilcClientAPI/silc_client_add_private_message_key
1532 * silc_client_add_private_message_key(SilcClient client,
1533 * SilcClientConnection conn,
1534 * SilcClientEntry client_entry,
1535 * const char *cipher,
1537 * unsigned char *key,
1538 * SilcUInt32 key_len);
1542 * Adds a static private message key to the client library. The key
1543 * will be used to encrypt all private message between the client and
1544 * the remote client indicated by the `client_entry'. The `key' can
1545 * be for example a pre-shared-key, passphrase or similar shared secret
1546 * string. The `cipher' and `hmac' MAY be provided but SHOULD be NULL
1547 * to assure that the requirements of the SILC protocol are met. The
1548 * API, however, allows to allocate any cipher and HMAC.
1550 * If the private message key is added to client without first receiving
1551 * a request for it from the remote `client_entry' this function will
1552 * send the request to `client_entry'. Note that, the actual key is
1553 * not sent to the network.
1555 * It is not necessary to set key for normal private message usage. If the
1556 * key is not set then the private messages are encrypted using normal
1557 * session keys. Setting the private key, however, increases security.
1559 * Returns FALSE if the key is already set for the `client_entry', TRUE
1563 SilcBool silc_client_add_private_message_key(SilcClient client,
1564 SilcClientConnection conn,
1565 SilcClientEntry client_entry,
1569 SilcUInt32 key_len);
1571 /****f* silcclient/SilcClientAPI/silc_client_add_private_message_key_ske
1576 * silc_client_add_private_message_key_ske(SilcClient client,
1577 * SilcClientConnection conn,
1578 * SilcClientEntry client_entry,
1579 * const char *cipher,
1581 * SilcSKEKeyMaterial key);
1585 * Same as silc_client_add_private_message_key but takes the key material
1586 * from the SKE key material structure. This structure is received if
1587 * the application uses the silc_client_send_key_agreement to negotiate
1588 * the key material. The `cipher' and `hmac' SHOULD be provided as it is
1589 * negotiated also in the SKE protocol.
1592 SilcBool silc_client_add_private_message_key_ske(SilcClient client,
1593 SilcClientConnection conn,
1594 SilcClientEntry client_entry,
1597 SilcSKEKeyMaterial key);
1599 /****f* silcclient/SilcClientAPI/silc_client_del_private_message_key
1604 * silc_client_del_private_message_key(SilcClient client,
1605 * SilcClientConnection conn,
1606 * SilcClientEntry client_entry);
1610 * Removes the private message from the library. The key won't be used
1611 * after this to protect the private messages with the remote `client_entry'
1612 * client. Returns FALSE on error, TRUE otherwise.
1615 SilcBool silc_client_del_private_message_key(SilcClient client,
1616 SilcClientConnection conn,
1617 SilcClientEntry client_entry);
1619 /****f* silcclient/SilcClientAPI/silc_client_list_private_message_keys
1623 * SilcPrivateMessageKeys
1624 * silc_client_list_private_message_keys(SilcClient client,
1625 * SilcClientConnection conn,
1626 * SilcUInt32 *key_count);
1630 * Returns array of set private message keys associated to the connection
1631 * `conn'. Returns allocated SilcPrivateMessageKeys array and the array
1632 * count to the `key_count' argument. The array must be freed by the caller
1633 * by calling the silc_client_free_private_message_keys function. Note:
1634 * the keys returned in the array is in raw format. It might not be desired
1635 * to show the keys as is. The application might choose not to show the keys
1636 * at all or to show the fingerprints of the keys.
1639 SilcPrivateMessageKeys
1640 silc_client_list_private_message_keys(SilcClient client,
1641 SilcClientConnection conn,
1642 SilcUInt32 *key_count);
1644 /****f* silcclient/SilcClientAPI/silc_client_free_private_message_keys
1648 * void silc_client_free_private_message_keys(SilcPrivateMessageKeys keys,
1649 * SilcUInt32 key_count);
1653 * Frees the SilcPrivateMessageKeys array returned by the function
1654 * silc_client_list_private_message_keys.
1657 void silc_client_free_private_message_keys(SilcPrivateMessageKeys keys,
1658 SilcUInt32 key_count);
1660 /****f* silcclient/SilcClientAPI/silc_client_private_message_key_is_set
1665 * silc_client_private_message_key_is_set(SilcClient client,
1666 * SilcClientConnection conn,
1667 * SilcClientEntry client_entry);
1671 * Returns TRUE if the private message key has been set for the client
1672 * entry indicated by `client_entry'.
1676 silc_client_private_message_key_is_set(SilcClient client,
1677 SilcClientConnection conn,
1678 SilcClientEntry client_entry);
1681 /* Channel private key management */
1683 /****f* silcclient/SilcClientAPI/silc_client_add_channel_private_key
1688 * silc_client_add_channel_private_key(SilcClient client,
1689 * SilcClientConnection conn,
1690 * SilcChannelEntry channel,
1694 * unsigned char *key,
1695 * SilcUInt32 key_len,
1696 * SilcChannelPrivateKey *ret_key);
1700 * Adds private key for channel. When channel has private key then the
1701 * messages are encrypted using that key. All clients on the channel
1702 * must also know the key in order to decrypt the messages. However,
1703 * it is possible to have several private keys per one channel. In this
1704 * case only some of the clients on the channel may know the one key
1705 * and only some the other key. The `name' can be application given
1706 * name for the key. This returns the created key to the 'ret_key'
1707 * pointer if it is non-NULL;
1709 * If `cipher' and/or `hmac' is NULL then default values will be used
1710 * (aes-256-cbc for cipher and hmac-sha1-96 for hmac).
1712 * The private key for channel is optional. If it is not set then the
1713 * channel messages are encrypted using the channel key generated by the
1714 * server. However, setting the private key (or keys) for the channel
1715 * significantly adds security. If more than one key is set the library
1716 * will automatically try all keys at the message decryption phase. Note:
1717 * setting many keys slows down the decryption phase as all keys has to
1718 * be tried in order to find the correct decryption key. However, setting
1719 * a few keys does not have big impact to the decryption performace.
1723 * NOTE: This is entirely local setting. The key set using this function
1724 * is not sent to the network at any phase.
1726 * NOTE: If the key material was originated by the SKE protocol (using
1727 * silc_client_send_key_agreement) then the `key' MUST be the
1728 * key->send_enc_key as this is dictated by the SILC protocol. However,
1729 * currently it is not expected that the SKE key material would be used
1730 * as channel private key. However, this API allows it.
1733 SilcBool silc_client_add_channel_private_key(SilcClient client,
1734 SilcClientConnection conn,
1735 SilcChannelEntry channel,
1741 SilcChannelPrivateKey *ret_key);
1743 /****f* silcclient/SilcClientAPI/silc_client_del_channel_private_keys
1747 * SilcBool silc_client_del_channel_private_keys(SilcClient client,
1748 * SilcClientConnection conn,
1749 * SilcChannelEntry channel);
1753 * Removes all private keys from the `channel'. The old channel key is used
1754 * after calling this to protect the channel messages. Returns FALSE on
1755 * on error, TRUE otherwise.
1758 SilcBool silc_client_del_channel_private_keys(SilcClient client,
1759 SilcClientConnection conn,
1760 SilcChannelEntry channel);
1762 /****f* silcclient/SilcClientAPI/silc_client_del_channel_private_key
1766 * SilcBool silc_client_del_channel_private_key(SilcClient client,
1767 * SilcClientConnection conn,
1768 * SilcChannelEntry channel,
1769 * SilcChannelPrivateKey key);
1773 * Removes and frees private key `key' from the channel `channel'.
1774 * The `key' is retrieved by calling the function
1775 * silc_client_list_channel_private_keys. The key is not used after
1776 * this. If the key was last private key then the old channel key is
1777 * used hereafter to protect the channel messages. This returns FALSE
1778 * on error, TRUE otherwise.
1781 SilcBool silc_client_del_channel_private_key(SilcClient client,
1782 SilcClientConnection conn,
1783 SilcChannelEntry channel,
1784 SilcChannelPrivateKey key);
1786 /****f* silcclient/SilcClientAPI/silc_client_list_channel_private_keys
1791 * silc_client_list_channel_private_keys(SilcClient client,
1792 * SilcClientConnection conn,
1793 * SilcChannelEntry channel);
1797 * Returns list of private keys associated to the `channel'. The caller
1798 * must free the returned list with silc_dlist_uninit. The pointers in
1799 * the list may be used to delete the specific key by giving the pointer
1800 * as argument to the function silc_client_del_channel_private_key. Each
1801 * entry in the list is SilcChannelPrivateKey.
1804 SilcDList silc_client_list_channel_private_keys(SilcClient client,
1805 SilcClientConnection conn,
1806 SilcChannelEntry channel);
1808 /****f* silcclient/SilcClientAPI/silc_client_current_channel_private_key
1812 * void silc_client_current_channel_private_key(SilcClient client,
1813 * SilcClientConnection conn,
1814 * SilcChannelEntry channel,
1815 * SilcChannelPrivateKey key);
1819 * Sets the `key' to be used as current channel private key on the
1820 * `channel'. Packet sent after calling this function will be secured
1824 void silc_client_current_channel_private_key(SilcClient client,
1825 SilcClientConnection conn,
1826 SilcChannelEntry channel,
1827 SilcChannelPrivateKey key);
1830 /* Key Agreement routines */
1832 /****f* silcclient/SilcClientAPI/silc_client_send_key_agreement
1836 * void silc_client_send_key_agreement(SilcClient client,
1837 * SilcClientConnection conn,
1838 * SilcClientEntry client_entry,
1839 * SilcClientConnectionParams *params,
1840 * SilcPublicKey public_key,
1841 * SilcPrivateKey private_key,
1842 * SilcKeyAgreementCallback completion,
1847 * Sends key agreement request to the remote client indicated by the
1850 * If `params' is non-NULL and it has the `local_ip' and `local_port' set
1851 * the caller will provide the connection endpoint for the key agreement
1852 * connection. The `bind_ip' can be used to bind to that IP instead of
1853 * `local_ip'. If the `udp' is set to TRUE the connection will be UDP
1854 * instead of TCP. Caller may also set the `repository', `verify_notfound'
1855 * and `timeout_secs' fields in `params'. Other fields are ignored.
1856 * If `params' is NULL, then the `client_entry' is expected to provide
1857 * the connection endpoint for us. It is recommended the `timeout_secs'
1858 * is specified in case the remote client does not reply anything to
1861 * The `public_key' and `private_key' is our identity in the key agreement.
1863 * In case we do not provide the connection endpoint, we will receive
1864 * the `key_agreement' client operation when the remote send its own
1865 * key agreement request packet. We may then there start the key
1866 * agreement with silc_client_perform_key_agreement. If we provided the
1867 * the connection endpoint, the client operation will not be called.
1869 * There can be only one active key agreement for `client_entry'. Old
1870 * key agreement may be aborted by calling silc_client_abort_key_agreement.
1874 * // Send key agreement request (we don't provide connection endpoint)
1875 * silc_client_send_key_agreement(client, conn, remote_client,
1876 * NULL, public_key, private_key,
1877 * my_keyagr_completion, my_context);
1879 * // Another example where we provide connection endpoint (TCP).
1880 * SilcClientConnectionParams params;
1881 * memset(¶ms, 0, sizeof(params));
1882 * params.local_ip = local_ip;
1883 * params.local_port = local_port;
1884 * params.timeout_secs = 60;
1885 * silc_client_send_key_agreement(client, conn, remote_client,
1886 * ¶ms, public_key, private_key,
1887 * my_keyagr_completion, my_context);
1890 void silc_client_send_key_agreement(SilcClient client,
1891 SilcClientConnection conn,
1892 SilcClientEntry client_entry,
1893 SilcClientConnectionParams *params,
1894 SilcPublicKey public_key,
1895 SilcPrivateKey private_key,
1896 SilcKeyAgreementCallback completion,
1899 /****f* silcclient/SilcClientAPI/silc_client_perform_key_agreement
1904 * silc_client_perform_key_agreement(SilcClient client,
1905 * SilcClientConnection conn,
1906 * SilcClientEntry client_entry,
1907 * SilcClientConnectionParams *params,
1908 * SilcPublicKey public_key,
1909 * SilcPrivateKey private_key,
1910 * char *hostname, int port,
1911 * SilcKeyAgreementCallback completion,
1916 * Performs the key agreement protocol. Application may use this to
1917 * initiate the key agreement protocol. Usually this is called after
1918 * receiving the `key_agreement' client operation.
1920 * The `hostname' is the remote hostname (or IP address) and the `port'
1921 * is the remote port. The `completion' callback with the `context' will
1922 * be called after the key agreement protocol.
1924 * The `params' is connection parameters and it may be used to define
1925 * the key agreement connection related parameters. It may be NULL.
1928 void silc_client_perform_key_agreement(SilcClient client,
1929 SilcClientConnection conn,
1930 SilcClientEntry client_entry,
1931 SilcClientConnectionParams *params,
1932 SilcPublicKey public_key,
1933 SilcPrivateKey private_key,
1934 char *hostname, int port,
1935 SilcKeyAgreementCallback completion,
1938 /****f* silcclient/SilcClientAPI/silc_client_perform_key_agreement_stream
1943 * silc_client_perform_key_agreement_stream(
1944 * SilcClient client,
1945 * SilcClientConnection conn,
1946 * SilcClientEntry client_entry,
1947 * SilcClientConnectionParams *params,
1948 * SilcPublicKey public_key,
1949 * SilcPrivateKey private_key,
1950 * SilcStream stream,
1951 * SilcKeyAgreementCallback completion,
1956 * Same as silc_client_perform_key_agreement but the caller has created
1957 * the connection to remote client. The `stream' is the created
1962 silc_client_perform_key_agreement_stream(SilcClient client,
1963 SilcClientConnection conn,
1964 SilcClientEntry client_entry,
1965 SilcClientConnectionParams *params,
1966 SilcPublicKey public_key,
1967 SilcPrivateKey private_key,
1969 SilcKeyAgreementCallback completion,
1972 /****f* silcclient/SilcClientAPI/silc_client_abort_key_agreement
1976 * void silc_client_abort_key_agreement(SilcClient client,
1977 * SilcClientConnection conn,
1978 * SilcClientEntry client_entry);
1982 * This function can be called to unbind the hostname and the port for
1983 * the key agreement protocol. However, this function has effect only
1984 * before the key agreement protocol has been performed. After it has
1985 * been performed the library will automatically unbind the port. The
1986 * `client_entry' is the client to which we sent the key agreement
1987 * request. The key agreement completion callback will be called
1988 * with SILC_KEY_AGREEMENT_ABORTED status.
1991 void silc_client_abort_key_agreement(SilcClient client,
1992 SilcClientConnection conn,
1993 SilcClientEntry client_entry);
1996 /* Misc functions */
1998 /****f* silcclient/SilcClientAPI/silc_client_set_away_message
2002 * SilcBool silc_client_set_away_message(SilcClient client,
2003 * SilcClientConnection conn,
2008 * Sets away `message'. The away message may be set when the client's
2009 * mode is changed to SILC_UMODE_GONE and the client whishes to reply
2010 * to anyone who sends private message. The `message' will be sent
2011 * automatically back to the the client who send private message. If
2012 * away message is already set this replaces the old message with the
2013 * new one. If `message' is NULL the old away message is removed.
2014 * The sender may freely free the memory of the `message'. Returns
2018 SilcBool silc_client_set_away_message(SilcClient client,
2019 SilcClientConnection conn,
2022 /****d* silcclient/SilcClientAPI/SilcClientMonitorStatus
2026 * typedef enum { ... } SilcClientMonitorStatus;
2030 * File transmission session status types. These will indicate
2031 * the status of the file transmission session.
2033 * The SILC_CLIENT_FILE_MONITOR_KEY_AGREEMENT is called when session
2034 * is key exchange phase.
2036 * The SILC_CLIENT_FILE_MONITOR_SEND is called when data is being sent
2039 * The SILC_CLIENT_FILE_MONITOR_RECEIVE is called when data is being
2040 * recieved from remote client.
2042 * The SILC_CLIENT_FILE_MONITOR_CLOSED will be called when the user
2043 * issues silc_client_file_close. If needed, it may be ignored in the
2046 * The SILC_CLIENT_FILE_MONITOR_DISCONNECT will be called if remote
2047 * disconnects the session connection. The silc_client_file_close must
2048 * be called when this status is received. The session is over when
2051 * The SILC_CLIENLT_FILE_MONITOR_ERROR is called in case some error
2052 * occured. The SilcClientFileError will indicate more detailed error
2053 * condition. The silc_client_file_close must be called when this status
2054 * is received. The session is over when this is received.
2059 SILC_CLIENT_FILE_MONITOR_KEY_AGREEMENT, /* In key agreemenet phase */
2060 SILC_CLIENT_FILE_MONITOR_SEND, /* Sending file */
2061 SILC_CLIENT_FILE_MONITOR_RECEIVE, /* Receiving file */
2062 SILC_CLIENT_FILE_MONITOR_GET, /* Unsupported */
2063 SILC_CLIENT_FILE_MONITOR_PUT, /* Unsupported */
2064 SILC_CLIENT_FILE_MONITOR_CLOSED, /* Session closed */
2065 SILC_CLIENT_FILE_MONITOR_DISCONNECT, /* Session disconnected */
2066 SILC_CLIENT_FILE_MONITOR_ERROR, /* Error during session */
2067 } SilcClientMonitorStatus;
2070 /****d* silcclient/SilcClientAPI/SilcClientFileError
2074 * typedef enum { ... } SilcClientFileError;
2078 * File transmission error types. These types are returned by
2079 * some of the file transmission functions, and by the monitor
2080 * callback to indicate error.
2085 SILC_CLIENT_FILE_OK,
2086 SILC_CLIENT_FILE_ERROR, /* Generic error */
2087 SILC_CLIENT_FILE_UNKNOWN_SESSION, /* Unknown session ID */
2088 SILC_CLIENT_FILE_ALREADY_STARTED, /* Session already started */
2089 SILC_CLIENT_FILE_NO_SUCH_FILE, /* No such file */
2090 SILC_CLIENT_FILE_PERMISSION_DENIED, /* Permission denied */
2091 SILC_CLIENT_FILE_KEY_AGREEMENT_FAILED, /* Key exchange failed */
2092 SILC_CLIENT_FILE_CONNECT_FAILED, /* Error during connecting */
2093 SILC_CLIENT_FILE_TIMEOUT, /* Connecting timedout */
2094 SILC_CLIENT_FILE_NO_MEMORY, /* System out of memory */
2095 } SilcClientFileError;
2098 /****f* silcclient/SilcClientAPI/SilcClientFileMonitor
2102 * typedef void (*SilcClientFileMonitor)(SilcClient client,
2103 * SilcClientConnection conn,
2104 * SilcClientMonitorStatus status,
2105 * SilcClientFileError error,
2106 * SilcUInt64 offset,
2107 * SilcUInt64 filesize,
2108 * SilcClientEntry client_entry,
2109 * SilcUInt32 session_id,
2110 * const char *filepath,
2115 * Monitor callback that is called during the file transmission to
2116 * monitor the transmission process. The `status' indicates the current
2117 * monitoring process. The `error' will indicate the error type
2118 * if `status' is SILC_CLIENT_FILE_MONITOR_ERROR. The `offset' is the
2119 * currently transmitted amount of total `filesize'. The `client_entry'
2120 * indicates the remote client, and the transmission session ID is the
2121 * `session_id'. The filename being transmitted is indicated by the
2122 * `filepath'. The `conn' is NULL if the connection to remote client
2123 * does not exist yet.
2126 typedef void (*SilcClientFileMonitor)(SilcClient client,
2127 SilcClientConnection conn,
2128 SilcClientMonitorStatus status,
2129 SilcClientFileError error,
2131 SilcUInt64 filesize,
2132 SilcClientEntry client_entry,
2133 SilcUInt32 session_id,
2134 const char *filepath,
2137 /****f* silcclient/SilcClientAPI/SilcClientFileName
2141 * typedef void (*SilcClientFileName)(const char *filepath,
2146 * Completion callback for the SilcClientFileAskName callback function.
2147 * Application calls this to deliver the filepath and filename where
2148 * the downloaded file is to be saved.
2151 typedef void (*SilcClientFileName)(const char *filepath,
2154 /****f* silcclient/SilcClientAPI/SilcClientFileAskName
2158 * typedef void (*SilcClientFileAskName)(SilcClient client,
2159 * SilcClientConnection conn,
2160 * SilcUInt32 session_id,
2161 * const char *remote_filename,
2162 * SilcClientFileName completion,
2163 * void *completion_context,
2168 * File name asking callback that is called if it is given to the
2169 * silc_client_file_receive and the path given to that as argument was
2170 * NULL. The library calls this to ask the filename and filepath to
2171 * where the file is to be saved. The 'remote_filename' is the file
2172 * that is being downloaded. Application must call the 'completion'
2173 * with 'completion_context' to continue with the file downloading.
2174 * It is not mandatory to provide this to the silc_client_file_receive.
2177 typedef void (*SilcClientFileAskName)(SilcClient client,
2178 SilcClientConnection conn,
2179 SilcUInt32 session_id,
2180 const char *remote_filename,
2181 SilcClientFileName completion,
2182 void *completion_context,
2185 /****f* silcclient/SilcClientAPI/silc_client_file_send
2189 * SilcClientFileError
2190 * silc_client_file_send(SilcClient client,
2191 * SilcClientConnection conn,
2192 * SilcClientEntry client_entry,
2193 * SilcClientConnectionParams *params,
2194 * SilcPublicKey public_key,
2195 * SilcPrivateKey private_key,
2196 * SilcClientFileMonitor monitor,
2197 * void *monitor_context,
2198 * const char *filepath,
2199 * SilcUInt32 *session_id);
2203 * Sends a file indicated by the `filepath' to the remote client
2204 * indicated by the `client_entry'. This will negotiate a secret key
2205 * with the remote client before actually starting the transmission of
2206 * the file. The `monitor' callback will be called to monitor the
2207 * transmission of the file.
2209 * This returns a file session ID for the file transmission to the
2210 * `session_id' pointer. It can be used to close the session (and
2211 * abort the file transmission) by calling the silc_client_file_close
2212 * function. The session ID is also returned in the `monitor' callback.
2214 * If `params' is non-NULL and it has the `local_ip' and `local_port' set
2215 * the caller will provide the connection endpoint for the key agreement
2216 * connection. The `bind_ip' can be used to bind to that IP instead of
2217 * `local_ip'. Caller may also set the `repository', `verify_notfound'
2218 * and `timeout_secs' fields in `params'. Other fields are ignored.
2219 * If `params' is NULL, then the `client_entry' is expected to provide
2220 * the connection endpoint for us. It is recommended the `timeout_secs'
2221 * is specified in case the remote client does not reply anything to
2224 * The `public_key' and `private_key' is our identity in the key agreement.
2226 * If error will occur during the file transfer process the error status
2227 * will be returned in the monitor callback. In this case the application
2228 * must call silc_client_file_close to close the session.
2232 silc_client_file_send(SilcClient client,
2233 SilcClientConnection conn,
2234 SilcClientEntry client_entry,
2235 SilcClientConnectionParams *params,
2236 SilcPublicKey public_key,
2237 SilcPrivateKey private_key,
2238 SilcClientFileMonitor monitor,
2239 void *monitor_context,
2240 const char *filepath,
2241 SilcUInt32 *session_id);
2243 /****f* silcclient/SilcClientAPI/silc_client_file_receive
2247 * SilcClientFileError
2248 * silc_client_file_receive(SilcClient client,
2249 * SilcClientConnection conn,
2250 * SilcClientConnectionParams *params,
2251 * SilcPublicKey public_key,
2252 * SilcPrivateKey private_key,
2253 * SilcClientFileMonitor monitor,
2254 * void *monitor_context,
2256 * SilcUInt32 session_id,
2257 * SilcClientFileAskName ask_name,
2258 * void *ask_name_context);
2262 * Receives a file from a client indicated by the `client_entry'. The
2263 * `session_id' indicates the file transmission session and it has been
2264 * received in the `ftp' client operation callback. This will actually
2265 * perform the key agreement protocol with the remote client before
2266 * actually starting the file transmission. The `monitor' callback
2267 * will be called to monitor the transmission. If `path' is non-NULL
2268 * the file will be saved into that directory. If NULL the file is
2269 * saved in the current working directory, unless the 'ask_name'
2270 * callback is non-NULL. In this case the callback is called to ask
2271 * the path and filename from application.
2273 * The `params' is the connection related parameters. If the remote client
2274 * provided connection point the `params' will be used when creating
2275 * connection to the remote client. If remote client did not provide
2276 * connection point the `params' is used to provide connection point
2277 * locally for the remote client. See silc_client_file_send for more
2278 * information on providing connection point for remote client.
2280 * The `public_key' and `private_key' is our identity in the key agreement.
2282 * If error will occur during the file transfer process the error status
2283 * will be returned in the monitor callback. In this case the application
2284 * must call silc_client_file_close to close the session.
2288 silc_client_file_receive(SilcClient client,
2289 SilcClientConnection conn,
2290 SilcClientConnectionParams *params,
2291 SilcPublicKey public_key,
2292 SilcPrivateKey private_key,
2293 SilcClientFileMonitor monitor,
2294 void *monitor_context,
2296 SilcUInt32 session_id,
2297 SilcClientFileAskName ask_name,
2298 void *ask_name_context);
2300 /****f* silcclient/SilcClientAPI/silc_client_file_close
2304 * SilcClientFileError silc_client_file_close(SilcClient client,
2305 * SilcClientConnection conn,
2306 * SilcUInt32 session_id);
2310 * Closes file transmission session indicated by the `session_id'.
2311 * If file transmission is being conducted it will be aborted
2312 * automatically. This function is also used to close the session
2313 * after successful file transmission. This function can be used
2314 * also to reject incoming file transmission request. If the
2315 * session was already started and the monitor callback was set
2316 * the monitor callback will be called with the monitor status
2317 * SILC_CLIENT_FILE_MONITOR_CLOSED.
2320 SilcClientFileError silc_client_file_close(SilcClient client,
2321 SilcClientConnection conn,
2322 SilcUInt32 session_id);
2324 /****f* silcclient/SilcClientAPI/silc_client_attribute_add
2328 * SilcAttributePayload
2329 * silc_client_attribute_add(SilcClient client,
2330 * SilcClientConnection conn,
2331 * SilcAttribute attribute,
2333 * SilcUInt32 object_size);
2337 * Add new Requsted Attribute for WHOIS command to the client library.
2338 * The `attribute' object indicated by `object' is added and allocated
2339 * SilcAttributePayload is returned. The `object' must be of correct
2340 * type and of correct size. See the SilcAttribute for object types
2341 * for different attributes. You may also get all added attributes
2342 * from the client with silc_client_attributes_get function.
2344 * Requested Attributes are different personal information about the
2345 * user, status information and other information which other users
2346 * may query with WHOIS command. Application may set these so that
2347 * if someone sends WHOIS query these attributes will be replied back
2348 * to the sender. The library always puts the public key to the
2349 * Requested Attributes, but if application wishes to add additional
2350 * public keys (or certificates) it can be done with this interface.
2351 * Library also always computes digital signature of the attributes
2352 * automatically, so application does not need to do that.
2355 SilcAttributePayload silc_client_attribute_add(SilcClient client,
2356 SilcClientConnection conn,
2357 SilcAttribute attribute,
2359 SilcUInt32 object_size);
2361 /****f* silcclient/SilcClientAPI/silc_client_attribute_del
2365 * SilcBool silc_client_attribute_del(SilcClient client,
2366 * SilcClientConnection conn,
2367 * SilcAttribute attribute,
2368 * SilcAttributePayload attr);
2372 * Delete a Requested Attribute from the client. If the `attribute'
2373 * is non-zero then all attributes of that type are deleted and the
2374 * `attr' is ignored. If `attr' is non-NULL then that specific
2375 * attribute is deleted and `attribute' is ignored.
2377 * You may get all added attributes with the function
2378 * silc_client_attributes_get and to get the SilcAttributePayload.
2379 * This function Returns TRUE if the attribute was found and deleted.
2382 SilcBool silc_client_attribute_del(SilcClient client,
2383 SilcClientConnection conn,
2384 SilcAttribute attribute,
2385 SilcAttributePayload attr);
2387 /****f* silcclient/SilcClientAPI/silc_client_attributes_get
2391 * const SilcHashTable
2392 * silc_client_attributes_get(SilcClient client,
2393 * SilcClientConnection conn);
2397 * Returns pointer to the SilcHashTable which includes all the added
2398 * Requested Attributes. The caller must not free the hash table.
2399 * The caller may use SilcHashTableList and silc_hash_table_list to
2400 * traverse the table. Each entry in the hash table is one added
2401 * SilcAttributePayload. It is possible to delete a attribute
2402 * payload while traversing the table.
2405 SilcHashTable silc_client_attributes_get(SilcClient client,
2406 SilcClientConnection conn);
2408 /****f* silcclient/SilcClientAPI/silc_client_attributes_request
2412 * SilcBuffer silc_client_attributes_request(SilcAttribute attribute, ...);
2416 * Constructs a Requested Attributes buffer. If the `attribute' is zero (0)
2417 * then all attributes are requested. Alternatively, `attribute' and
2418 * all variable arguments can each be requested attribute. In this case
2419 * the last must be set to zero (0) to complete the variable list of
2420 * requested attributes. See SilcAttribute for all attributes.
2421 * You can give the returned buffer as argument to for example
2422 * silc_client_get_client_by_id_resolve function.
2426 * Request all attributes
2427 * buffer = silc_client_attributes_request(0);
2429 * Request only the following attributes
2430 * buffer = silc_client_attributes_request(SILC_ATTRIBUTE_USER_INFO,
2431 * SILC_ATTRIBUTE_SERVICE,
2432 * SILC_ATTRIBUTE_MOOD, 0);
2435 SilcBuffer silc_client_attributes_request(SilcAttribute attribute, ...);
2437 /****f* silcclient/SilcClientAPI/silc_client_nickname_format
2442 * silc_client_nickname_format(SilcClient client,
2443 * SilcClientConnection conn,
2444 * SilcClientEntry client_entry,
2445 * SilcBool priority);
2449 * Formats the nickname of `client_entry' according to the nickname
2450 * formatting rules set in SilcClientParams. If the `priority' is TRUE
2451 * then the `client_entry' will always get the unformatted nickname.
2452 * If FALSE and there are more than one same nicknames in the client
2453 * the nickname will be formatted.
2455 * This returns NULL on error. Otherwise, the client entry that was
2456 * formatted is returned. If `priority' is FALSE this always returns
2457 * the `client_entry'. If it is TRUE, this may return the client entry
2458 * that was formatted after giving the `client_entry' the unformatted
2461 * Usually application does not need to call this function, as the library
2462 * automatically formats nicknames. However, if application wants to
2463 * for example force the `client_entry' to always have the unformatted
2464 * nickname it may call this function to do so.
2467 SilcClientEntry silc_client_nickname_format(SilcClient client,
2468 SilcClientConnection conn,
2469 SilcClientEntry client_entry,
2472 /****f* silcclient/SilcClientAPI/silc_client_nickname_parse
2476 * SilcBool silc_client_nickname_parse(SilcClient client,
2477 * SilcClientConnection conn,
2483 * Parses the `nickname' according to the format string given in the
2484 * SilcClientParams. Returns the parsed nickname into the `ret_nick'.
2485 * The caller must free the returned pointer. Returns FALSE if error
2486 * occurred during parsing. Returns TRUE if the nickname was parsed,
2487 * it was not formatted or if the format string has not been specified
2488 * in SilcClientParams.
2491 SilcBool silc_client_nickname_parse(SilcClient client,
2492 SilcClientConnection conn,
2500 #endif /* SILCCLIENT_H */