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uhub/src/core/hub.h

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/*
* uhub - A tiny ADC p2p connection hub
* Copyright (C) 2007-2014, Jan Vidar Krey
*
* 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 3 of the License, or
* (at your option) any later version.
*
* 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
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
#ifndef HAVE_UHUB_HUB_H
#define HAVE_UHUB_HUB_H
enum status_message
{
status_msg_hub_full = -1, /* hub is full */
status_msg_hub_disabled = -2, /* hub is disabled */
status_msg_hub_registered_users_only = -3, /* hub is for registered users only */
status_msg_inf_error_nick_missing = -4, /* no nickname given */
status_msg_inf_error_nick_multiple = -5, /* multiple nicknames given */
status_msg_inf_error_nick_invalid = -6, /* generic/unknown */
status_msg_inf_error_nick_long = -7, /* nickname too long */
status_msg_inf_error_nick_short = -8, /* nickname too short */
status_msg_inf_error_nick_spaces = -9, /* nickname cannot start with spaces */
status_msg_inf_error_nick_bad_chars = -10, /* nickname contains chars below ascii 32 */
status_msg_inf_error_nick_not_utf8 = -11, /* nickname is not valid utf8 */
status_msg_inf_error_nick_taken = -12, /* nickname is in use */
status_msg_inf_error_nick_restricted = -13, /* nickname cannot be used on this hub */
status_msg_inf_error_cid_invalid = -14, /* CID is not valid (generic error) */
status_msg_inf_error_cid_missing = -15, /* CID is not specified */
status_msg_inf_error_cid_taken = -16, /* CID is taken (already logged in?). */
status_msg_inf_error_pid_missing = -17, /* PID is not specified */
status_msg_inf_error_pid_invalid = -18, /* PID is invalid */
status_msg_ban_permanently = -19, /* Banned permanently */
status_msg_ban_temporarily = -20, /* Banned temporarily */
status_msg_auth_invalid_password = -21, /* Password is wrong */
status_msg_auth_user_not_found = -22, /* User not found in password database */
status_msg_error_no_memory = -23, /* Hub is out of memory */
status_msg_user_share_size_low = -40, /* User is not sharing enough. */
status_msg_user_share_size_high = -41, /* User is sharing too much. */
status_msg_user_slots_low = -42, /* User has too few slots open. */
status_msg_user_slots_high = -43, /* User has too many slots open. */
status_msg_user_hub_limit_low = -44, /* User is on too few hubs. */
status_msg_user_hub_limit_high = -45, /* User is on too many hubs. */
status_msg_proto_no_common_hash = -50, /* No common hash algorithms */
status_msg_proto_obsolete_adc0 = -51, /* Client is using an obsolete protocol version */
};
enum hub_state
{
hub_status_uninitialized = 0, /**<<<"Hub is uninitialized" */
hub_status_running = 1, /**<<<"Hub is running (normal operation)" */
hub_status_restart = 2, /**<<<"Hub is restarting (re-reading configuration, etc)" */
hub_status_shutdown = 3, /**<<<"Hub is shutting down, but not yet stopped. */
hub_status_stopped = 4, /**<<<"Hub is stopped (Pretty much the same as initialized) */
hub_status_disabled = 5, /**<<<"Hub is disabled (Running, but not accepting users) */
};
/**
* Always updated each minute.
*/
struct hub_stats
{
size_t net_tx;
size_t net_rx;
size_t net_tx_peak;
size_t net_rx_peak;
size_t net_tx_total;
size_t net_rx_total;
struct timeout_evt* timeout; /**<< "Timeout handler for statistics" */
};
struct hub_logout_info
{
time_t time;
char cid[MAX_CID_LEN+1];
char nick[MAX_NICK_LEN+1];
struct ip_addr_encap addr;
enum user_quit_reason reason;
};
struct hub_info
{
struct net_connection* server;
struct linked_list* server_alt_ports;
struct hub_stats stats;
struct event_queue* queue;
struct hub_config* config;
struct hub_user_manager* users;
struct acl_handle* acl;
struct adc_message* command_info; /* The hub's INF command */
struct adc_message* command_support; /* The hub's SUP command */
struct adc_message* command_banner; /* The default welcome message */
time_t tm_started;
int status;
char* recvbuf; /* Global receive buffer */
char* sendbuf; /* Global send buffer */
struct linked_list* logout_info; /* Log of people logging out. */
struct command_base* commands; /* Hub command handler */
struct uhub_plugins* plugins; /* Plug-ins loaded for this hub instance. */
#ifdef SSL_SUPPORT
struct ssl_context_handle* ctx;
#endif /* SSL_SUPPORT */
};
/**
* This is the message pre-routing centre.
*
* Any message coming in to the hub comes through here first,
* and will be routed further if valid.
*
* @return 0 on success, -1 on error
*/
extern int hub_handle_message(struct hub_info* hub, struct hub_user* u, const char* message, size_t length);
/**
* Handle protocol support/subscription messages received clients.
*
* @return 0 on success, -1 on error
*/
extern int hub_handle_support(struct hub_info* hub, struct hub_user* u, struct adc_message* cmd);
/**
* Handle password messages received from clients.
*
* @return 0 on success, -1 on error
*/
extern int hub_handle_password(struct hub_info* hub, struct hub_user* u, struct adc_message* cmd);
/**
* Handle chat messages received from clients.
* @return 0 on success, -1 on error.
*/
extern int hub_handle_chat_message(struct hub_info* hub, struct hub_user* u, struct adc_message* cmd);
/**
* Used internally by hub_handle_info
* @return 1 if nickname is OK, or 0 if nickname is not accepted.
*/
extern int hub_handle_info_check_nick(struct hub_info* hub, struct hub_user* u, struct adc_message* cmd);
/**
* Used internally by hub_handle_info
* @return 1 if CID/PID is OK, or 0 if not valid.
*/
extern int hub_handle_info_check_cid(struct hub_info* hub, struct hub_user* u, struct adc_message* cmd);
/**
* Send the support line for the hub to a particular user.
* Only used during the initial handshake.
*/
extern void hub_send_support(struct hub_info* hub, struct hub_user* u);
/**
* Send a message assigning a SID for a user.
* This is only sent after hub_send_support() during initial handshake.
*/
extern void hub_send_sid(struct hub_info* hub, struct hub_user* u);
/**
* Send a 'ping' message to user.
*/
extern void hub_send_ping(struct hub_info* hub, struct hub_user* user);
/**
* Send a message containing hub information to a particular user.
* This is sent during user connection, but can safely be sent at any
* point later.
*/
extern void hub_send_hubinfo(struct hub_info* hub, struct hub_user* u);
/**
* Send handshake. This basically calls
* hub_send_support() and hub_send_sid()
*/
extern void hub_send_handshake(struct hub_info* hub, struct hub_user* u);
/**
* Send a password challenge to a user.
* This is only used if the user tries to access the hub using a
* password protected nick name.
*/
extern void hub_send_password_challenge(struct hub_info* hub, struct hub_user* u);
/**
* Sends a status_message to a user.
*/
extern void hub_send_status(struct hub_info*, struct hub_user* user, enum status_message msg, enum msg_status_level level);
/**
* Warn user about flooding.
*/
extern void hub_send_flood_warning(struct hub_info*, struct hub_user* user, const char* message);
/**
* Allocates memory, initializes the hub based on the configuration,
* and returns a hub handle.
* This hub handle must be passed to hub_shutdown_service() in order to cleanup before exiting.
*
* @return a pointer to the hub info.
*/
extern struct hub_info* hub_start_service(struct hub_config* config);
/**
* This shuts down the hub.
*/
extern void hub_shutdown_service(struct hub_info* hub);
/**
* This configures the hub.
*/
extern void hub_set_variables(struct hub_info* hub, struct acl_handle* acl);
/**
* This frees the configuration of the hub.
*/
extern void hub_free_variables(struct hub_info* hub);
/**
* Returns a string for the given status_message (See enum status_message).
*/
extern const char* hub_get_status_message(struct hub_info* hub, enum status_message msg);
extern const char* hub_get_status_message_log(struct hub_info* hub, enum status_message msg);
/**
* Returns the number of logged in users on the hub.
*/
extern size_t hub_get_user_count(struct hub_info* hub);
/**
* Returns the maximum number of allowed users on the hub.
*/
extern size_t hub_get_max_user_count(struct hub_info* hub);
/**
* Returns the accumulated shared size for all logged in
* users on the hub.
*/
extern uint64_t hub_get_shared_size(struct hub_info* hub);
/**
* Returns the accumulated number of files for all logged
* in users on the hub.
*/
extern uint64_t hub_get_shared_files(struct hub_info* hub);
/**
* Returns the minimal share size limit as enforced by
* this hub's configuration.
*/
extern uint64_t hub_get_min_share(struct hub_info* hub);
/**
* Returns the minimal share size limit as enforced by
* this hub's configuration.
*/
extern uint64_t hub_get_max_share(struct hub_info* hub);
/**
* Returns the minimum upload slot limit as enforced by
* this hub's configuration.
* Users with fewer slots in total will not be allowed
* to enter the hub.
* @return limit or 0 if no limit.
*/
extern size_t hub_get_min_slots(struct hub_info* hub);
/**
* Returns the maximum upload slot limit as enforced by
* this hub's configuration.
* Users with more allowed upload slots will not be
* allowed to enter the hub.
* @return limit or 0 if no limit.
*/
extern size_t hub_get_max_slots(struct hub_info* hub);
/**
* Returns the maximum number of hubs a user can
* be logged in to simultaneously as a regular user (guest).
* Users on more hubs will not be allowed to stay on this hub.
* @return limit or 0 if no limit.
*/
extern size_t hub_get_max_hubs_user(struct hub_info* hub);
extern size_t hub_get_min_hubs_user(struct hub_info* hub);
/**
* Returns the maximum number of hubs a user can
* be logged in to simultaneously as a registered user (password required).
* Users on more hubs will not be allowed to stay on this hub.
* @return limit or 0 if no limit.
*/
extern size_t hub_get_max_hubs_reg(struct hub_info* hub);
extern size_t hub_get_min_hubs_reg(struct hub_info* hub);
/**
* Returns the maximum number of hubs a user can
* be logged in to simultaneously as an operator.
* Users who are operator on more than this amount of hubs
* will not be allowed to stay on this hub.
* @return limit or 0 if no limit.
*/
extern size_t hub_get_max_hubs_op(struct hub_info* hub);
extern size_t hub_get_min_hubs_op(struct hub_info* hub);
/**
* Returns the maximum number of hubs a user can
* be logged in to simultaneously regardless of the type of user.
*/
extern size_t hub_get_max_hubs_total(struct hub_info* hub);
/**
* Schedule runslice.
*/
extern void hub_schedule_runslice(struct hub_info* hub);
/**
* Run event loop.
*/
extern void hub_event_loop(struct hub_info* hub);
/**
* Schedule destroying a user.
*/
extern void hub_schedule_destroy_user(struct hub_info* hub, struct hub_user* user);
/**
* Disconnect a user from the hub.
*/
extern void hub_disconnect_user(struct hub_info* hub, struct hub_user* user, int reason);
/**
* Log a user logging out.
*/
extern void hub_logout_log(struct hub_info* hub, struct hub_user* user);
#endif /* HAVE_UHUB_HUB_H */
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