/*
 * Copyright (c) 2014 - 2018 The DragonFly Project.  All rights reserved.
 *
 * This code is derived from software contributed to The DragonFly Project
 * by Bill Yuan <bycn82@dragonflybsd.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#ifndef _IP_FW3_STATE_H
#define _IP_FW3_STATE_H

struct ipfw3_ioc_state {
        struct in_addr          src_addr;
        struct in_addr          dst_addr;
        u_short                 src_port;
        u_short                 dst_port;
        int                     rule_id;
        int                     cpu_id;
        int                     proto;
        int                     direction;
        time_t                  life;
};

#define LEN_IOC_FW3_STATE sizeof(struct ipfw3_ioc_state);


#ifdef _KERNEL



struct ipfw3_state {
        RB_ENTRY(ipfw3_state)   entries;
        uint32_t                src_addr;
        uint32_t                dst_addr;
        uint16_t                src_port;
        uint16_t                dst_port;
        struct ip_fw            *stub;
        time_t                  timestamp;
};
#define LEN_FW3_STATE sizeof(struct ipfw3_state)

int     ip_fw3_state_cmp(struct ipfw3_state *s1, struct ipfw3_state *s2);

RB_HEAD(fw3_state_tree, ipfw3_state);
RB_PROTOTYPE(fw3_state_tree, ipfw3_state, entries, ip_fw3_state_cmp);

/* place to hold the states */
struct ipfw3_state_context {
        struct fw3_state_tree   rb_tcp_in;
        struct fw3_state_tree   rb_tcp_out;
        struct fw3_state_tree   rb_udp_in;
        struct fw3_state_tree   rb_udp_out;
        struct fw3_state_tree   rb_icmp_in;
        struct fw3_state_tree   rb_icmp_out;

        int             count_tcp_in;
        int             count_tcp_out;
        int             count_udp_in;
        int             count_udp_out;
        int             count_icmp_in;
        int             count_icmp_out;
};
#define LEN_STATE_CTX sizeof(struct ipfw3_state_context)

void    check_check_state(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
                struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len);
void    check_keep_state(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
                struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len);

void    ip_fw3_state_flush_dispatch(netmsg_t nmsg);
void    ip_fw3_state_flush(struct ip_fw *rule);

void    ip_fw3_state_cleanup_dispatch(netmsg_t nmsg);
void    ip_fw3_state_cleanup(void *dummy __unused);
void    ip_fw3_state_append_dispatch(netmsg_t nmsg);
void    ip_fw3_state_delete_dispatch(netmsg_t nmsg);
int     ip_fw3_ctl_state_add(struct sockopt *sopt);
int     ip_fw3_ctl_state_delete(struct sockopt *sopt);
int     ip_fw3_ctl_state_flush(struct sockopt *sopt);
int     ip_fw3_ctl_state_get(struct sockopt *sopt);
int     ip_fw3_ctl_state_sockopt(struct sockopt *sopt);
void    ip_fw3_state_init_dispatch(netmsg_t msg);
void    ip_fw3_state_fini_dispatch(netmsg_t msg);
void    ip_fw3_state_fini(void);
void    ip_fw3_state_init(void);
void    ip_fw3_state_modevent(int type);
#endif  /* _KERNEL */
#endif