/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (C) 2011 Hiroki Sato <hrs@FreeBSD.org>
 * All rights reserved.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
 *
 */

#define SOCK_BACKLOG            5

#define CM_MSG_MAXLEN           8192
#define CM_VERSION              1
#define CM_VERSION_STR          "1.0"

#define CM_TYPE_EOM             0
#define CM_TYPE_ACK             1
#define CM_TYPE_ERR             2
#define CM_TYPE_NUL             3
#define CM_TYPE_REQ_SET_PROP    4
#define CM_TYPE_REQ_GET_PROP    5
#define CM_TYPE_MAX             6

#define CM_STATE_EOM            0
#define CM_STATE_INIT           1
#define CM_STATE_MSG_DISPATCH   2
#define CM_STATE_MSG_RECV       3
#define CM_STATE_ACK_WAIT       4

struct ctrl_msg_hdr {
        int     cm_version;
        size_t  cm_len;
        int     cm_type;
};

struct ctrl_msg_pl {
        char    *cp_ifname;
        char    *cp_key;

        size_t  cp_val_len;
        char    *cp_val;
};

int     csock_open(struct sockinfo *, mode_t);
int     csock_close(struct sockinfo *);
int     csock_listen(struct sockinfo *);
int     csock_accept(struct sockinfo *);
int     cm_send(int, char *);
int     cm_recv(int, char *);

size_t                  cm_pl2bin(char *, struct ctrl_msg_pl *);
struct ctrl_msg_pl      *cm_bin2pl(char *, struct ctrl_msg_pl *);
size_t                  cm_str2bin(char *, void *, size_t);
void                    *cm_bin2str(char *, void *, size_t);