Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
- Copyright (C) 1997 - 2000 Pekka Riikonen
+ Copyright (C) 1997 - 2001 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
typedef struct SilcClientEntryStruct *SilcClientEntry;
typedef struct SilcChannelEntryStruct *SilcChannelEntry;
+/* Context for holding cache information to periodically purge
+ the cache. */
+typedef struct {
+ SilcIDCache cache;
+ void *timeout_queue;
+} *SilcIDListPurge;
+
+/*
+ Generic ID list data structure.
+
+ This structure is included in all ID list entries and it includes data
+ pointers that are common to all ID entries. This structure is always
+ defined to the first field in the ID entries and is used to explicitly
+ cast to this type without first explicitly casting to correct ID entry
+ type. Hence, the ID list entry is casted to this type to get this data
+ from the ID entry (which is usually opaque pointer).
+
+ Note that some of the fields may be NULL.
+
+*/
+typedef struct {
+ /* Send and receive symmetric keys */
+ SilcCipher send_key;
+ SilcCipher receive_key;
+
+ /* Hash selected in the SKE protocol, NULL if not needed at all */
+ SilcHash hash;
+
+ /* HMAC and raw key data */
+ SilcHmac hmac;
+ unsigned char *hmac_key;
+ unsigned int hmac_key_len;
+
+ /* PKCS and public key */
+ SilcPKCS pkcs;
+ SilcPublicKey public_key;
+
+ long last_receive; /* Time last received data */
+ long last_sent; /* Time last sent data */
+ unsigned char registered; /* Boolean whether connection is registered */
+} *SilcIDListData, SilcIDListDataStruct;
+
/*
SILC Server entry object.
Following short description of the fields:
+ SilcIDListDataStruct data
+
+ Generic data structure to hold data common to all ID entries.
+
char *server_name
Logical name of the server. There is no limit of the length of the
the server SILC will ever need. These are also the informations
that is broadcasted between servers and routers in the SILC network.
+ char *server_info
+ char *motd
+
+ Server info (from INFO command) saved temporarily and motd (from
+ MOTD command) saved temporarily.
+
SilcServerEntry router
This is a pointer back to the server list. This is the router server
it doesn't have a route this is NULL.
SilcCipher send_key
-
SilcCipher receive_key
+ Data sending and receiving keys.
+
void *connection
A pointer, usually, to the socket list for fast referencing to
*/
struct SilcServerEntryStruct {
+ /* Generic data structure. DO NOT add anything before this! */
+ SilcIDListDataStruct data;
+
char *server_name;
int server_type;
SilcServerID *id;
-
- /* TRUE when server is registered to server */
- int registered;
+ char *server_info;
+ char *motd;
/* Pointer to the router */
SilcServerEntry router;
- /* Keys */
- SilcCipher send_key;
- SilcCipher receive_key;
- SilcPKCS pkcs;
- SilcPublicKey public_key;
- SilcHmac hmac;
- unsigned char *hmac_key;
- unsigned int hmac_key_len;
-
/* Connection data */
void *connection;
};
+/*
+ SILC Channel Client entry structure.
+
+ This entry used only by the SilcChannelEntry object and it holds
+ information about current clients (ie. users) on channel. Following
+ short description of the fields:
+
+ SilcClientEntry client
+
+ Pointer to the client list. This is the client currently on channel.
+
+ unsigned int mode
+
+ Client's current mode on the channel.
+
+ SilcChannelEntry channel
+
+ Back pointer back to channel. As this structure is also used by
+ SilcClientEntry we have this here for fast access to the channel when
+ used by SilcClientEntry.
+
+ struct SilcChannelClientEntryStruct *client_list
+ struct SilcChannelClientEntryStruct *channel_list
+
+ List member pointers. This structure is used by channel entry and
+ client entry thus we must have separate list member pointers for
+ them since we are using same entry for both lists (the entry is not
+ duplicated). SilcList requires this.
+
+*/
+typedef struct SilcChannelClientEntryStruct {
+ SilcClientEntry client;
+ unsigned int mode;
+ SilcChannelEntry channel;
+ struct SilcChannelClientEntryStruct *client_list;
+ struct SilcChannelClientEntryStruct *channel_list;
+} *SilcChannelClientEntry;
+
/*
SILC Client entry object.
Following short description of the fields:
+ SilcIDListDataStruct data
+
+ Generic data structure to hold data common to all ID entries.
+
char username
- Client's (meaning user's) real name. This is defined in following
- manner:
+ Client's usename. This is defined in the following manner:
Server type List type Contents
====================================================
Client's mode. Client maybe for example server operator or
router operator (SILC operator).
- SilcServerEntry router
+ long last_command
- This is a pointer to the server list. This is the router server whose
- cell this client is coming from. This is used to route messages to
- this client.
+ Time of last time client executed command. We are strict and will
+ not allow any command to be exeucted more than once in about
+ 2 seconds. This is result of normal time().
- SilcCipher session_key
+ char fast_command
- The actual session key established by key exchange protcol between
- connecting parties. This is used for both encryption and decryption.
+ Counter to check command bursts. By default, up to 5 commands
+ are allowed before limiting the execution. See command flags
+ for more detail.
- SilcPKCS pkcs
+ SilcServerEntry router
- PKCS of the client. This maybe NULL.
+ This is a pointer to the server list. This is the router server whose
+ cell this client is coming from. This is used to route messages to
+ this client.
- SilcHmac hmac
- unsigned char *hmac_key
- unsigned int hmac_key_len
+ SilcList channels
- MAC key used to compute MAC's for packets.
+ List of channels this client has joined.
void *connection
*/
struct SilcClientEntryStruct {
- char *nickname;
+ /* Generic data structure. DO NOT add anything before this! */
+ SilcIDListDataStruct data;
+
+ unsigned char *nickname;
char *username;
char *userinfo;
SilcClientID *id;
int mode;
- /* TRUE when client is registered to server */
- int registered;
+ long last_command;
+ char fast_command;
/* Pointer to the router */
SilcServerEntry router;
- /* Pointers to channels this client has joined */
- SilcChannelEntry *channel;
- unsigned int channel_count;
-
- /* Keys */
- SilcCipher send_key;
- SilcCipher receive_key;
- SilcPKCS pkcs;
- SilcHmac hmac;
- SilcPublicKey public_key;
- unsigned char *hmac_key;
- unsigned int hmac_key_len;
+ /* List of channels client has joined to */
+ SilcList channels;
/* Connection data */
void *connection;
};
-/*
- SILC Channel Client entry structure.
-
- This entry used only by the SilcChannelEntry object and it holds
- information about current clients (ie. users) on channel. Following
- short description of the fields:
-
- SilcClientEntry client
-
- Pointer to the client list. This is the client currently on channel.
-
- int mode
-
- Client's current mode on the channel.
-
-*/
-typedef struct SilcChannelClientEntryStruct {
- SilcClientEntry client;
- int mode;
-} *SilcChannelClientEntry;
-
/*
SILC Channel entry object.
Logical name of the channel.
- int mode
+ unsigned int mode
- Current mode of the channel.
+ Current mode of the channel. See lib/silccore/silcchannel.h for
+ all modes.
SilcChannelID *id
Current topic of the channel.
+ char *cipher
+
+ Default cipher of the channel. If this is NULL then server picks
+ the cipher to be used. This can be set at SILC_COMMAND_JOIN.
+
+ char *hmac_name
+
+ Default hmac of the channel. If this is NULL then server picks
+ the cipher to be used. This can be set at SILC_COMMAND_JOIN.
+
+ SilcPublicKey founder_key
+ SilcAuthMethod founder_method
+ unsigned char *founder_passwd
+ unsigned int founder_passwd_len
+
+ If the SILC_CMODE_FOUNDER_AUTH has been set then these will include
+ the founder's public key, authentication method and the password
+ if the method is SILC_AUTH_PASSWORD. If it is SILC_AUTH_PUBLIC_KEY
+ then the `founder_passwd' is NULL.
+
SilcServerEntry router
This is a pointer to the server list. This is the router server
Current initial vector. Initial vector is received always along
with the channel packet. By default this is filled with NULL.
+ SilcHmac hmac;
+
+ HMAC of the channel.
+
*/
struct SilcChannelEntryStruct {
char *channel_name;
- int mode;
+ unsigned int mode;
SilcChannelID *id;
int global_users;
char *topic;
+ char *cipher;
+ char *hmac_name;
+
+ SilcPublicKey founder_key;
+ SilcAuthMethod founder_method;
+ unsigned char *founder_passwd;
+ unsigned int founder_passwd_len;
+
+ unsigned int user_limit;
+ unsigned char *passphrase;
+ char *invite_list;
+ char *ban_list;
/* List of users on channel */
- SilcChannelClientEntry user_list;
- unsigned int user_list_count;
+ SilcList user_list;
/* Pointer to the router */
SilcServerEntry router;
unsigned char *key;
unsigned int key_len;
unsigned char iv[SILC_CIPHER_MAX_IV_SIZE];
+ SilcHmac hmac;
};
/*
} *SilcIDList;
/*
- Temporary ID Entry object.
+ ID Entry for Unknown connections.
This is used during authentication phases where we still don't know
what kind of connection remote connection is, hence, we will use this
*/
typedef struct {
- SilcCipher send_key;
- SilcCipher receive_key;
- SilcPKCS pkcs;
- SilcPublicKey public_key;
-
- SilcHmac hmac;
- unsigned char *hmac_key;
- unsigned int hmac_key_len;
-
- /* SilcComp comp */
+ /* Generic data structure. DO NOT add anything before this! */
+ SilcIDListDataStruct data;
} *SilcUnknownEntry;
/* Prototypes */
+void silc_idlist_add_data(void *entry, SilcIDListData idata);
+void silc_idlist_del_data(void *entry);
+SILC_TASK_CALLBACK_GLOBAL(silc_idlist_purge);
SilcServerEntry
silc_idlist_add_server(SilcIDList id_list,
char *server_name, int server_type,
SilcServerID *id, SilcServerEntry router,
- SilcCipher send_key, SilcCipher receive_key,
- SilcPKCS pkcs, SilcHmac hmac,
- SilcPublicKey public_key, void *connection);
+ void *connection);
+SilcServerEntry
+silc_idlist_find_server_by_id(SilcIDList id_list, SilcServerID *id,
+ SilcIDCacheEntry *ret_entry);
+SilcServerEntry
+silc_idlist_find_server_by_name(SilcIDList id_list, char *name,
+ SilcIDCacheEntry *ret_entry);
+SilcServerEntry
+silc_idlist_find_server_by_conn(SilcIDList id_list, char *hostname,
+ int port, SilcIDCacheEntry *ret_entry);
+SilcServerEntry
+silc_idlist_replace_server_id(SilcIDList id_list, SilcServerID *old_id,
+ SilcServerID *new_id);
+void silc_idlist_del_server(SilcIDList id_list, SilcServerEntry entry);
SilcClientEntry
-silc_idlist_add_client(SilcIDList id_list, char *nickname, char *username,
+silc_idlist_add_client(SilcIDList id_list, unsigned char *nickname,
+ unsigned int nickname_len, char *username,
char *userinfo, SilcClientID *id,
- SilcServerEntry router,
- SilcCipher send_key, SilcCipher receive_key,
- SilcPKCS pkcs, SilcHmac hmac,
- SilcPublicKey public_key, void *connection);
-void silc_idlist_del_client(SilcIDList id_list, SilcClientEntry entry);
+ SilcServerEntry router, void *connection);
+int silc_idlist_del_client(SilcIDList id_list, SilcClientEntry entry);
+SilcClientEntry *
+silc_idlist_get_clients_by_nickname(SilcIDList id_list, char *nickname,
+ char *server, unsigned int *clients_count);
+SilcClientEntry *
+silc_idlist_get_clients_by_hash(SilcIDList id_list, char *nickname,
+ SilcHash md5hash,
+ unsigned int *clients_count);
SilcClientEntry
-silc_idlist_find_client_by_nickname(SilcIDList id_list, char *nickname,
- char *server);
+silc_idlist_find_client_by_hash(SilcIDList id_list, char *nickname,
+ SilcHash md5hash, SilcIDCacheEntry *ret_entry);
SilcClientEntry
-silc_idlist_find_client_by_hash(SilcIDList id_list, unsigned char *hash,
- SilcHash md5hash);
+silc_idlist_find_client_by_id(SilcIDList id_list, SilcClientID *id,
+ SilcIDCacheEntry *ret_entry);
SilcClientEntry
-silc_idlist_find_client_by_id(SilcIDList id_list, SilcClientID *id);
+silc_idlist_replace_client_id(SilcIDList id_list, SilcClientID *old_id,
+ SilcClientID *new_id);
+void silc_idlist_client_destructor(SilcIDCache cache,
+ SilcIDCacheEntry entry);
SilcChannelEntry
silc_idlist_add_channel(SilcIDList id_list, char *channel_name, int mode,
SilcChannelID *id, SilcServerEntry router,
- SilcCipher channel_key);
-void silc_idlist_del_channel(SilcIDList id_list, SilcChannelEntry entry);
+ SilcCipher channel_key, SilcHmac hmac);
+int silc_idlist_del_channel(SilcIDList id_list, SilcChannelEntry entry);
+SilcChannelEntry
+silc_idlist_find_channel_by_name(SilcIDList id_list, char *name,
+ SilcIDCacheEntry *ret_entry);
SilcChannelEntry
-silc_idlist_find_channel_by_name(SilcIDList id_list, char *name);
+silc_idlist_find_channel_by_id(SilcIDList id_list, SilcChannelID *id,
+ SilcIDCacheEntry *ret_entry);
SilcChannelEntry
-silc_idlist_find_channel_by_id(SilcIDList id_list, SilcChannelID *id);
+silc_idlist_replace_channel_id(SilcIDList id_list, SilcChannelID *old_id,
+ SilcChannelID *new_id);
+SilcChannelEntry *
+silc_idlist_get_channels(SilcIDList id_list, SilcChannelID *channel_id,
+ unsigned int *channels_count);
#endif