117 lines
3.7 KiB
C
117 lines
3.7 KiB
C
/**
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* @file RandomPacketSink.h
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* @author Ambroz Bizjak <ambrop7@gmail.com>
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*
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* @section LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RANDOMPACKETSINK_H
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#define _RANDOMPACKETSINK_H
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#include <stdio.h>
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#include <misc/debug.h>
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#include <security/BRandom.h>
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#include <system/BReactor.h>
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#include <base/DebugObject.h>
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#include <flow/PacketPassInterface.h>
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typedef struct {
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BReactor *reactor;
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PacketPassInterface input;
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BTimer timer;
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DebugObject d_obj;
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} RandomPacketSink;
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static void _RandomPacketSink_input_handler_send (RandomPacketSink *s, uint8_t *data, int data_len)
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{
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DebugObject_Access(&s->d_obj);
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printf("sink: send '");
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size_t res = fwrite(data, data_len, 1, stdout);
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B_USE(res)
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uint8_t r;
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BRandom_randomize(&r, sizeof(r));
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if (r&(uint8_t)1) {
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printf("' accepting\n");
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PacketPassInterface_Done(&s->input);
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} else {
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printf("' delaying\n");
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BReactor_SetTimer(s->reactor, &s->timer);
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}
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}
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static void _RandomPacketSink_input_handler_requestcancel (RandomPacketSink *s)
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{
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DebugObject_Access(&s->d_obj);
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printf("sink: cancelled\n");
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BReactor_RemoveTimer(s->reactor, &s->timer);
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PacketPassInterface_Done(&s->input);
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}
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static void _RandomPacketSink_timer_handler (RandomPacketSink *s)
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{
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DebugObject_Access(&s->d_obj);
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PacketPassInterface_Done(&s->input);
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}
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static void RandomPacketSink_Init (RandomPacketSink *s, BReactor *reactor, int mtu, int ms)
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{
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// init arguments
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s->reactor = reactor;
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// init input
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PacketPassInterface_Init(&s->input, mtu, (PacketPassInterface_handler_send)_RandomPacketSink_input_handler_send, s, BReactor_PendingGroup(reactor));
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PacketPassInterface_EnableCancel(&s->input, (PacketPassInterface_handler_requestcancel)_RandomPacketSink_input_handler_requestcancel);
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// init timer
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BTimer_Init(&s->timer, ms, (BTimer_handler)_RandomPacketSink_timer_handler, s);
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DebugObject_Init(&s->d_obj);
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}
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static void RandomPacketSink_Free (RandomPacketSink *s)
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{
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DebugObject_Free(&s->d_obj);
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// free timer
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BReactor_RemoveTimer(s->reactor, &s->timer);
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// free input
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PacketPassInterface_Free(&s->input);
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}
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static PacketPassInterface * RandomPacketSink_GetInput (RandomPacketSink *s)
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{
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DebugObject_Access(&s->d_obj);
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return &s->input;
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}
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#endif
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