router.h

这是一个完全开放的

/*
 * jabberd - Jabber Open Source Server
 * Copyright (c) 2002 Jeremie Miller, Thomas Muldowney,
 *                    Ryan Eatmon, Robert Norris
 *
 * 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.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA
 */

/*! \mainpage jabberd - Jabber Open Source Server
 *
 * \section intro Introduction
 *
 * The jabberd project aims to provide an open-source server
 * implementation of the Jabber protocols for instant messaging
 * and XML routing. The goal of this project is to provide a
 * scalable, reliable, efficient and extensible server that
 * provides a complete set of features and is up to date with
 * the latest protocol revisions.
 *
 * The project web page:\n
 * http://jabberd.jabberstudio.org/
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include "sx/sx.h"
#include "sx/ssl.h"
#include "sx/sasl.h"
#include "mio/mio.h"
#include "util/util.h"

#ifdef HAVE_SIGNAL_H
# include <signal.h>
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif

typedef struct router_st    *router_t;
typedef struct component_st *component_t;
typedef struct alias_st     *alias_t;

struct router_st {
    /** our id */
    char                *id;

    /** config */
    config_t            config;

    /** user table */
    xht                 users;
    time_t              users_load;

    /** logging */
    log_t               log;

    /** log data */
    log_type_t          log_type;
    char                *log_facility;
    char                *log_ident;

    /** how we listen for stuff */
    char                *local_ip;
    int                 local_port;
    char                *local_secret;
    char                *local_pemfile;

    /** max file descriptors */
    int                 io_max_fds;

    /** access controls */
    access_t            access;

    /** connection rates */
    int                 conn_rate_total;
    int                 conn_rate_seconds;
    int                 conn_rate_wait;

    xht                 conn_rates;

    /** default byte rates (karma) */
    int                 byte_rate_total;
    int                 byte_rate_seconds;
    int                 byte_rate_wait;

    /** sx environment */
    sx_env_t            sx_env;
    sx_plugin_t         sx_ssl;
    sx_plugin_t         sx_sasl;

    /** managed io */
    mio_t               mio;

    /** listening socket */
    int                 fd;

    /** stringprep cache */
    prep_cache_t        pc;
    
    /** attached components, key is 'ip:port', var is component_t */
    xht                 components;

    /** valid routes, key is route name (packet "to" address), var is component_t */
    xht                 routes;

    /** default route, only one */
    char                *default_route;

    /** log sinks, key is route name, var is component_t */
    xht                 log_sinks;

    /** configured aliases */
    alias_t             aliases;

    /** access control lists */
    xht                 aci;

    /** list of sx_t waiting to be cleaned up */
    jqueue_t            dead;
};

/** a single component */
struct component_st {
    router_t            r;

    /** file descriptor */
    int                 fd;

    /** remote ip and port */
    char                ip[INET6_ADDRSTRLEN];
    int                 port;

    /** ip:port pair */
    char                ipport[INET6_ADDRSTRLEN + 6];

    /** our stream */
    sx_t                s;

    /** rate limits */
    rate_t              rate;
    int                 rate_log;

    /** valid routes to this component, key is route name */
    xht                 routes;

    /** true if this is an old component:accept stream */
    int                 legacy;

    /** throttle queue */
    jqueue_t            tq;
};

struct alias_st {
    char                *name;
    char                *target;

    alias_t             next;
};

int     router_mio_callback(mio_t m, mio_action_t a, int fd, void *data, void *arg);
void    router_sx_handshake(sx_t s, sx_buf_t buf, void *arg);

xht     aci_load(router_t r);
int     aci_check(xht acls, char *type, char *name);

int     user_table_load(router_t r);