5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2001 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; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
24 /* Forward declaration for client */
25 typedef struct SilcClientObject *SilcClient;
27 /* Forward declaration for client connection */
28 typedef struct SilcClientConnectionObject *SilcClientConnection;
34 /* Structure to hold ping time information. Every PING command will
35 add entry of this structure and is removed after reply to the ping
37 typedef struct SilcClientPingStruct {
43 /* Structure to hold away messages set by user. This is mainly created
44 for future extensions where away messages could be set according filters
45 such as nickname and hostname. For now only one away message can
46 be set in one connection. */
47 typedef struct SilcClientAwayStruct {
49 struct SilcClientAwayStruct *next;
52 /* Connection structure used in client to associate all the important
53 connection specific data to this structure. */
54 struct SilcClientConnectionObject {
60 /* Local client ID for this connection */
61 SilcClientID *local_id;
63 /* Decoded local ID so that the above defined ID would not have
64 to be decoded for every packet. */
65 unsigned char *local_id_data;
66 unsigned int local_id_data_len;
68 /* Own client entry. */
69 SilcClientEntry local_entry;
79 /* Remote server ID for this connection */
80 SilcServerID *remote_id;
82 /* Decoded remote ID so that the above defined ID would not have
83 to be decoded for every packet. */
84 unsigned char *remote_id_data;
85 unsigned int remote_id_data_len;
92 SilcCipher receive_key;
94 unsigned char *hmac_key;
95 unsigned int hmac_key_len;
97 /* Client ID and Channel ID cache. Messages transmitted in SILC network
98 are done using different unique ID's. These are the cache for
99 thoses ID's used in the communication. */
100 SilcIDCache client_cache;
101 SilcIDCache channel_cache;
102 SilcIDCache server_cache;
104 /* Current channel on window. All channels are saved (allocated) into
105 the cache entries. */
106 SilcChannelEntry current_channel;
108 /* Socket connection object for this connection (window). This
109 object will have a back-pointer to this window object for fast
110 referencing (sock->user_data). */
111 SilcSocketConnection sock;
113 /* Pending command queue for this connection */
114 SilcDList pending_commands;
116 /* Current command identifier, 0 not used */
117 unsigned short cmd_ident;
119 /* Requested pings. */
120 SilcClientPing *ping;
121 unsigned int ping_count;
123 /* Set away message */
124 SilcClientAway *away;
126 /* Pointer back to the SilcClient. This object is passed to the application
127 and the actual client object is accesible through this pointer. */
130 /* User data context. Library does not touch this. */
134 /* Main client structure. */
135 struct SilcClientObject {
137 * Public data. All the following pointers must be set by the allocator
141 /* Users's username, hostname and realname. */
146 /* Private and public key of the user. */
148 SilcPublicKey public_key;
149 SilcPrivateKey private_key;
151 /* Application specific user data pointer. Client library does not
156 * Private data. Following pointers are used internally by the client
157 * library and should be considered read-only fields.
160 /* All client operations that are implemented in the application. */
161 SilcClientOperations *ops;
163 /* SILC client task queues */
164 SilcTaskQueue io_queue;
165 SilcTaskQueue timeout_queue;
166 SilcTaskQueue generic_queue;
168 /* Table of connections in client. All the connection data is saved here. */
169 SilcClientConnection *conns;
170 unsigned int conns_count;
172 /* Generic cipher and hash objects. These can be used and referenced
173 by the application as well. */
174 SilcCipher none_cipher;
180 /* Random Number Generator. Application should use this as its primary
181 random number generator. */
187 /* Registers generic task for file descriptor for reading from network and
188 writing to network. As being generic task the actual task is allocated
189 only once and after that the same task applies to all registered fd's. */
190 #define SILC_CLIENT_REGISTER_CONNECTION_FOR_IO(fd) \
192 SilcTask tmptask = silc_task_register(client->generic_queue, (fd), \
193 silc_client_packet_process, \
196 SILC_TASK_PRI_NORMAL); \
197 silc_task_set_iotype(tmptask, SILC_TASK_WRITE); \
200 #define SILC_CLIENT_SET_CONNECTION_FOR_INPUT(fd) \
202 silc_schedule_set_listen_fd((fd), (1L << SILC_TASK_READ)); \
205 #define SILC_CLIENT_SET_CONNECTION_FOR_OUTPUT(fd) \
207 silc_schedule_set_listen_fd((fd), ((1L << SILC_TASK_READ) | \
208 (1L << SILC_TASK_WRITE))); \
211 /* Finds socket connection object by file descriptor */
212 #define SILC_CLIENT_GET_SOCK(__x, __fd, __sock) \
216 for (__i = 0; __i < (__x)->conns_count; __i++) \
217 if ((__x)->conns[__i]->sock->sock == (__fd)) \
220 if (__i >= (__x)->conns_count) \
222 (__sock) = (__x)->conns[__i]->sock; \
225 /* Prototypes (some of the prototypes are defined in the silcapi.h) */
227 void silc_client_packet_send(SilcClient client,
228 SilcSocketConnection sock,
231 SilcIdType dst_id_type,
235 unsigned int data_len,
237 void silc_client_disconnected_by_server(SilcClient client,
238 SilcSocketConnection sock,
240 void silc_client_error_by_server(SilcClient client,
241 SilcSocketConnection sock,
243 void silc_client_notify_by_server(SilcClient client,
244 SilcSocketConnection sock,
245 SilcPacketContext *packet);
246 void silc_client_receive_new_id(SilcClient client,
247 SilcSocketConnection sock,
249 void silc_client_new_channel_id(SilcClient client,
250 SilcSocketConnection sock,
252 unsigned int mode, SilcIDPayload idp);
253 void silc_client_save_channel_key(SilcClientConnection conn,
254 SilcBuffer key_payload,
255 SilcChannelEntry channel);
256 void silc_client_receive_channel_key(SilcClient client,
257 SilcSocketConnection sock,
259 void silc_client_channel_message(SilcClient client,
260 SilcSocketConnection sock,
261 SilcPacketContext *packet);
262 void silc_client_private_message(SilcClient client,
263 SilcSocketConnection sock,
264 SilcPacketContext *packet);
265 void silc_client_remove_from_channels(SilcClient client,
266 SilcClientConnection conn,
267 SilcClientEntry client_entry);
268 void silc_client_replace_from_channels(SilcClient client,
269 SilcClientConnection conn,
271 SilcClientEntry new);
272 char *silc_client_chmode(unsigned int mode);
273 char *silc_client_chumode(unsigned int mode);
274 char *silc_client_chumode_char(unsigned int mode);