badvpn/examples/TimerPacketSink.h

/**
 * @file TimerPacketSink.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 _TIMERPACKETSINK_H
#define _TIMERPACKETSINK_H

#include <stdio.h>

#include <misc/debug.h>
#include <system/BReactor.h>
#include <flow/PacketPassInterface.h>

typedef struct {
    BReactor *reactor;
    PacketPassInterface input;
    BTimer timer;
} TimerPacketSink;

static void _TimerPacketSink_input_handler_send (TimerPacketSink *s, uint8_t *data, int data_len)
{
    printf("sink: send '");
    size_t res = fwrite(data, data_len, 1, stdout);
    B_USE(res)
    printf("'\n");
    
    BReactor_SetTimer(s->reactor, &s->timer);
}

static void _TimerPacketSink_input_handler_requestcancel (TimerPacketSink *s)
{
    printf("sink: cancelled\n");
    
    BReactor_RemoveTimer(s->reactor, &s->timer);
    PacketPassInterface_Done(&s->input);
}

static void _TimerPacketSink_timer_handler (TimerPacketSink *s)
{
    printf("sink: done\n");
    
    PacketPassInterface_Done(&s->input);
}

static void TimerPacketSink_Init (TimerPacketSink *s, BReactor *reactor, int mtu, int ms)
{
    // init arguments
    s->reactor = reactor;
    
    // init input
    PacketPassInterface_Init(&s->input, mtu, (PacketPassInterface_handler_send)_TimerPacketSink_input_handler_send, s, BReactor_PendingGroup(s->reactor));
    PacketPassInterface_EnableCancel(&s->input, (PacketPassInterface_handler_requestcancel)_TimerPacketSink_input_handler_requestcancel);
    
    // init timer
    BTimer_Init(&s->timer, ms, (BTimer_handler)_TimerPacketSink_timer_handler, s);
}

static void TimerPacketSink_Free (TimerPacketSink *s)
{
    // free timer
    BReactor_RemoveTimer(s->reactor, &s->timer);
    
    // free input
    PacketPassInterface_Free(&s->input);
}

static PacketPassInterface * TimerPacketSink_GetInput (TimerPacketSink *s)
{
    return &s->input;
}

#endif