X-Git-Url: http://git.silcnet.org/gitweb/?a=blobdiff_plain;f=lib%2Fsilcclient%2Fclient_internal.h;h=4155d61ed93e77a40f49d779d8f81329e2a96bb8;hb=413da0f8686910f5e627393157566ae729ca99c4;hp=53b03ab2f475cfe39cae74a76c4404b8bdea6c90;hpb=7442402559fc951743360779cede89e0efcb63bf;p=silc.git diff --git a/lib/silcclient/client_internal.h b/lib/silcclient/client_internal.h index 53b03ab2..4155d61e 100644 --- a/lib/silcclient/client_internal.h +++ b/lib/silcclient/client_internal.h @@ -2,15 +2,14 @@ client_internal.h - Author: Pekka Riikonen + Author: Pekka Riikonen - Copyright (C) 1997 - 2001 Pekka Riikonen + Copyright (C) 1997 - 2001, 2003 Pekka Riikonen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - + the Free Software Foundation; version 2 of the License. + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the @@ -21,6 +20,27 @@ #ifndef CLIENT_INTERNAL_H #define CLIENT_INTERNAL_H +/* Context to hold the connection authentication request callbacks that + will be called when the server has replied back to our request about + current authentication method in the session. */ +typedef struct { + SilcConnectionAuthRequest callback; + void *context; + SilcTask timeout; +} *SilcClientConnAuthRequest; + +/* Generic rekey context for connections */ +typedef struct { + /* Current sending encryption key, provided for re-key. The `pfs' + is TRUE if the Perfect Forward Secrecy is performed in re-key. */ + unsigned char *send_enc_key; + SilcUInt32 enc_key_len; + int ske_group; + bool pfs; + SilcUInt32 timeout; + void *context; +} *SilcClientRekey; + /* Internal context for connection process. This is needed as we doing asynchronous connecting. */ typedef struct { @@ -34,7 +54,7 @@ typedef struct { void *context; } SilcClientInternalConnectContext; -/* Structure to hold ping time information. Every PING command will +/* Structure to hold ping time information. Every PING command will add entry of this structure and is removed after reply to the ping as been received. */ struct SilcClientPingStruct { @@ -45,19 +65,233 @@ struct SilcClientPingStruct { /* Structure to hold away messages set by user. This is mainly created for future extensions where away messages could be set according filters - such as nickname and hostname. For now only one away message can + such as nickname and hostname. For now only one away message can be set in one connection. */ struct SilcClientAwayStruct { char *away; struct SilcClientAwayStruct *next; }; -/* Protypes */ +/* 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 */ SILC_TASK_CALLBACK_GLOBAL(silc_client_packet_process); +void silc_client_packet_send(SilcClient client, + SilcSocketConnection sock, + SilcPacketType type, + void *dst_id, + SilcIdType dst_id_type, + SilcCipher cipher, + SilcHmac hmac, + unsigned char *data, + SilcUInt32 data_len, + bool force_send); int silc_client_packet_send_real(SilcClient client, SilcSocketConnection sock, - bool force_send, - bool flush); + bool force_send); +void silc_client_ftp_free_sessions(SilcClient client, + SilcClientConnection conn); +void silc_client_ftp_session_free(SilcClientFtpSession session); +void silc_client_ftp_session_free_client(SilcClientConnection conn, + SilcClientEntry client_entry); +void silc_client_close_connection_real(SilcClient client, + SilcSocketConnection sock, + SilcClientConnection conn); +void silc_client_disconnected_by_server(SilcClient client, + SilcSocketConnection sock, + SilcBuffer packet); +void silc_client_error_by_server(SilcClient client, + SilcSocketConnection sock, + SilcBuffer message); +void silc_client_receive_new_id(SilcClient client, + SilcSocketConnection sock, + SilcIDPayload idp); +void silc_client_save_channel_key(SilcClient client, + SilcClientConnection conn, + SilcBuffer key_payload, + SilcChannelEntry channel); +void silc_client_receive_channel_key(SilcClient client, + SilcSocketConnection sock, + SilcBuffer packet); +void silc_client_channel_message(SilcClient client, + SilcSocketConnection sock, + SilcPacketContext *packet); +void silc_client_remove_from_channels(SilcClient client, + SilcClientConnection conn, + SilcClientEntry client_entry); +void silc_client_replace_from_channels(SilcClient client, + SilcClientConnection conn, + SilcClientEntry old, + SilcClientEntry newclient); +void silc_client_process_failure(SilcClient client, + SilcSocketConnection sock, + SilcPacketContext *packet); +void silc_client_key_agreement(SilcClient client, + SilcSocketConnection sock, + SilcPacketContext *packet); +void silc_client_notify_by_server(SilcClient client, + SilcSocketConnection sock, + SilcPacketContext *packet); +void silc_client_private_message(SilcClient client, + SilcSocketConnection sock, + SilcPacketContext *packet); +void silc_client_connection_auth_request(SilcClient client, + SilcSocketConnection sock, + SilcPacketContext *packet); +void silc_client_ftp(SilcClient client, + SilcSocketConnection sock, + SilcPacketContext *packet); +SilcBuffer silc_client_get_detach_data(SilcClient client, + SilcClientConnection conn); +bool silc_client_process_detach_data(SilcClient client, + SilcClientConnection conn, + unsigned char **old_id, + SilcUInt16 *old_id_len); +void silc_client_resume_session(SilcClient client, + SilcClientConnection conn, + SilcClientResumeSessionCallback callback, + void *context); +SilcBuffer silc_client_attributes_process(SilcClient client, + SilcSocketConnection sock, + SilcDList attrs); +void silc_client_packet_queue_purge(SilcClient client, + SilcSocketConnection sock); +SILC_TASK_CALLBACK_GLOBAL(silc_client_rekey_callback); #endif