113 lines
4.0 KiB
C
113 lines
4.0 KiB
C
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/**
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* @file KeepaliveIO.c
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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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#include <misc/debug.h>
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#include "KeepaliveIO.h"
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static void keepalive_handler (KeepaliveIO *o)
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{
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DebugObject_Access(&o->d_obj);
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PacketRecvBlocker_AllowBlockedPacket(&o->ka_blocker);
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}
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int KeepaliveIO_Init (KeepaliveIO *o, BReactor *reactor, PacketPassInterface *output, PacketRecvInterface *keepalive_input, btime_t keepalive_interval_ms)
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{
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ASSERT(PacketRecvInterface_GetMTU(keepalive_input) <= PacketPassInterface_GetMTU(output))
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ASSERT(keepalive_interval_ms > 0)
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// set arguments
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o->reactor = reactor;
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// init keep-alive sender
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PacketPassInactivityMonitor_Init(&o->kasender, output, o->reactor, keepalive_interval_ms, (PacketPassInactivityMonitor_handler)keepalive_handler, o);
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// init queue
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PacketPassPriorityQueue_Init(&o->queue, PacketPassInactivityMonitor_GetInput(&o->kasender), BReactor_PendingGroup(o->reactor), 0);
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// init keepalive flow
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PacketPassPriorityQueueFlow_Init(&o->ka_qflow, &o->queue, -1);
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// init keepalive blocker
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PacketRecvBlocker_Init(&o->ka_blocker, keepalive_input, BReactor_PendingGroup(reactor));
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// init keepalive buffer
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if (!SinglePacketBuffer_Init(&o->ka_buffer, PacketRecvBlocker_GetOutput(&o->ka_blocker), PacketPassPriorityQueueFlow_GetInput(&o->ka_qflow), BReactor_PendingGroup(o->reactor))) {
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goto fail1;
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}
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// init user flow
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PacketPassPriorityQueueFlow_Init(&o->user_qflow, &o->queue, 0);
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DebugObject_Init(&o->d_obj);
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return 1;
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fail1:
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PacketRecvBlocker_Free(&o->ka_blocker);
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PacketPassPriorityQueueFlow_Free(&o->ka_qflow);
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PacketPassPriorityQueue_Free(&o->queue);
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PacketPassInactivityMonitor_Free(&o->kasender);
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return 0;
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}
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void KeepaliveIO_Free (KeepaliveIO *o)
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{
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DebugObject_Free(&o->d_obj);
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// allow freeing queue flows
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PacketPassPriorityQueue_PrepareFree(&o->queue);
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// free user flow
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PacketPassPriorityQueueFlow_Free(&o->user_qflow);
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// free keepalive buffer
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SinglePacketBuffer_Free(&o->ka_buffer);
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// free keepalive blocker
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PacketRecvBlocker_Free(&o->ka_blocker);
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// free keepalive flow
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PacketPassPriorityQueueFlow_Free(&o->ka_qflow);
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// free queue
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PacketPassPriorityQueue_Free(&o->queue);
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// free keep-alive sender
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PacketPassInactivityMonitor_Free(&o->kasender);
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}
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PacketPassInterface * KeepaliveIO_GetInput (KeepaliveIO *o)
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{
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DebugObject_Access(&o->d_obj);
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return PacketPassPriorityQueueFlow_GetInput(&o->user_qflow);
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}
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