/*
 * server.h - Define shadowsocks server's buffers and callbacks
 *
 * Copyright (C) 2013 - 2019, Max Lv <max.c.lv@gmail.com>
 *
 * This file is part of the shadowsocks-libev.
 *
 * shadowsocks-libev 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.
 *
 * shadowsocks-libev 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 shadowsocks-libev; see the file COPYING. If not, see
 * <http://www.gnu.org/licenses/>.
 */

#ifndef _SERVER_H
#define _SERVER_H

#include <time.h>
#include <libcork/ds.h>

#ifdef HAVE_LIBEV_EV_H
#include <libev/ev.h>
#else
#include <ev.h>
#endif

#ifdef __MINGW32__
#include "winsock.h"
#endif

#include "crypto.h"
#include "jconf.h"
#include "netutils.h"

#include "common.h"

typedef struct listen_ctx {
    ev_io io;
    int fd;
    int timeout;
    char *iface;
    struct ev_loop *loop;
} listen_ctx_t;

typedef struct server_ctx {
    ev_io io;
    ev_timer watcher;
    int connected;
    struct server *server;
} server_ctx_t;

#ifdef USE_NFCONNTRACK_TOS

#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack_tcp.h>

struct dscptracker {
    struct nf_conntrack *ct;
    long unsigned int mark;
    unsigned int dscp;
    unsigned int packet_count;
};

#endif

struct query;

typedef struct server {
    int fd;
    int stage;
    int frag;

    buffer_t *buf;

    cipher_ctx_t *e_ctx;
    cipher_ctx_t *d_ctx;
    struct server_ctx *recv_ctx;
    struct server_ctx *send_ctx;
    struct listen_ctx *listen_ctx;
    struct remote *remote;

    struct query *query;

    struct cork_dllist_item entries;
#ifdef USE_NFCONNTRACK_TOS
    struct dscptracker *tracker;
#endif
} server_t;

typedef struct query {
    server_t *server;
    char hostname[MAX_HOSTNAME_LEN];
} query_t;

typedef struct remote_ctx {
    ev_io io;
    int connected;
    struct remote *remote;
} remote_ctx_t;

typedef struct remote {
    int fd;
#ifdef TCP_FASTOPEN_WINSOCK
    OVERLAPPED olap;
    int connect_ex_done;
#endif
    buffer_t *buf;
    struct remote_ctx *recv_ctx;
    struct remote_ctx *send_ctx;
    struct server *server;
} remote_t;

#endif // _SERVER_H