/**
 * @file NCDInterfaceMonitor.h
 * @author Ambroz Bizjak <ambrop7@gmail.com>
 * 
 * @section LICENSE
 * 
 * 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 author 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 AUTHOR 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 BADVPN_NCD_NCDINTERFACEMONITOR_H
#define BADVPN_NCD_NCDINTERFACEMONITOR_H

#include <sys/socket.h>
#include <linux/netlink.h>

#include <misc/debug.h>
#include <base/DebugObject.h>
#include <system/BReactor.h>
#include <base/BPending.h>
#include <ncd/NCDIfConfig.h>

typedef void (*NCDInterfaceMonitor_handler) (void *user, const char *ifname, int if_flags);

typedef struct {
    BReactor *reactor;
    NCDInterfaceMonitor_handler handler;
    void *user;
    int netlink_fd;
    BFileDescriptor bfd;
    uint8_t buf[4096];
    struct nlmsghdr *buf_nh;
    int buf_left;
    BPending more_job;
    DebugObject d_obj;
} NCDInterfaceMonitor;

int NCDInterfaceMonitor_Init (NCDInterfaceMonitor *o, BReactor *reactor, NCDInterfaceMonitor_handler handler, void *user) WARN_UNUSED;
void NCDInterfaceMonitor_Free (NCDInterfaceMonitor *o);
void NCDInterfaceMonitor_Pause (NCDInterfaceMonitor *o);
void NCDInterfaceMonitor_Continue (NCDInterfaceMonitor *o);

#endif