+/* Internal context for the client->internal pointer in the SilcClient. */
+struct SilcClientInternalStruct {
+ /* All client operations that are implemented by the application. */
+ SilcClientOperations *ops;
+
+ /* Client Parameters */
+ SilcClientParams *params;
+
+ /* Table of connections in client. All the connection data is saved here. */
+ SilcClientConnection *conns;
+ SilcUInt32 conns_count;
+
+ /* Table of listenning sockets in client. Client can have listeners
+ (like key agreement protocol server) and those sockets are saved here.
+ This table is checked always if the connection object cannot be found
+ from the `conns' table. */
+ SilcSocketConnection *sockets;
+ SilcUInt32 sockets_count;
+
+ /* Registered commands */
+ SilcList commands;
+
+ /* Generic cipher and hash objects. */
+ SilcCipher none_cipher;
+ SilcHmac md5hmac;
+ SilcHmac sha1hmac;
+
+ /* Client version. Used to compare to remote host's version strings. */
+ char *silc_client_version;
+};
+
+/* Internal context for conn->internal in SilcClientConnection. */
+struct SilcClientConnectionInternalStruct {
+ /* Keys and stuff negotiated in the SKE protocol */
+ SilcCipher send_key;
+ SilcCipher receive_key;
+ SilcHmac hmac_send;
+ SilcHmac hmac_receive;
+ SilcHash hash;
+ SilcUInt32 psn_send;
+ SilcUInt32 psn_receive;
+
+ /* Client ID and Channel ID cache. Messages transmitted in SILC network
+ are done using different unique ID's. These are the cache for
+ thoses ID's used in the communication. */
+ SilcIDCache client_cache;
+ SilcIDCache channel_cache;
+ SilcIDCache server_cache;
+
+ /* Pending command queue for this connection */
+ SilcDList pending_commands;
+
+ /* Requested pings. */
+ SilcClientPing *ping;
+ SilcUInt32 ping_count;
+
+ /* Set away message */
+ SilcClientAway *away;
+
+ /* Re-key context */
+ SilcClientRekey rekey;
+
+ /* Authentication request context. */
+ SilcClientConnAuthRequest connauth;
+
+ /* File transmission sessions */
+ SilcDList ftp_sessions;
+ SilcUInt32 next_session_id;
+ SilcClientFtpSession active_session;
+
+ /* Requested Attributes */
+ SilcHashTable attrs;
+
+ /* Connection parameters */
+ SilcClientConnectionParams params;
+};
+
+/* Session resuming callback */
+typedef void (*SilcClientResumeSessionCallback)(SilcClient client,
+ SilcClientConnection conn,
+ bool success,
+ void *context);
+
+/* Rekey must be performed at the lastest when this many packets is sent */
+#define SILC_CLIENT_REKEY_THRESHOLD 0xfffffe00
+
+/* Macros */
+
+/* Registers generic task for file descriptor for reading from network and
+ writing to network. As being generic task the actual task is allocated
+ only once and after that the same task applies to all registered fd's. */
+#define SILC_CLIENT_REGISTER_CONNECTION_FOR_IO(fd) \
+do { \
+ silc_schedule_task_add(client->schedule, (fd), \
+ silc_client_packet_process, \
+ context, 0, 0, \
+ SILC_TASK_GENERIC, \
+ SILC_TASK_PRI_NORMAL); \
+} while(0)
+
+#define SILC_CLIENT_SET_CONNECTION_FOR_INPUT(s, fd) \
+do { \
+ silc_schedule_set_listen_fd((s), (fd), SILC_TASK_READ, FALSE); \
+} while(0)
+
+#define SILC_CLIENT_SET_CONNECTION_FOR_OUTPUT(s, fd) \
+do { \
+ silc_schedule_set_listen_fd((s), (fd), (SILC_TASK_READ | \
+ SILC_TASK_WRITE), FALSE); \
+} while(0)
+
+/* Finds socket connection object by file descriptor */
+#define SILC_CLIENT_GET_SOCK(__x, __fd, __sock) \
+do { \
+ int __i; \
+ \
+ for (__i = 0; __i < (__x)->internal->conns_count; __i++) \
+ if ((__x)->internal->conns[__i] && \
+ (__x)->internal->conns[__i]->sock && \
+ (__x)->internal->conns[__i]->sock->sock == (__fd)) \
+ break; \
+ \
+ if (__i >= (__x)->internal->conns_count) { \
+ (__sock) = NULL; \
+ for (__i = 0; __i < (__x)->internal->sockets_count; __i++) \
+ if ((__x)->internal->sockets[__i] && \
+ (__x)->internal->sockets[__i]->sock == (__fd)) \
+ (__sock) = (__x)->internal->sockets[__i]; \
+ } else \
+ (__sock) = (__x)->internal->conns[__i]->sock; \
+} while(0)
+
+/* Check whether rekey protocol is active */
+#define SILC_CLIENT_IS_REKEY(sock) \
+ (sock->protocol && sock->protocol->protocol && \
+ sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY)
+
+/* Prototypes */