tor-android/external/badvpn_dns/client/SinglePacketSource.c

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2015-01-25 11:08:34 +00:00
/**
* @file SinglePacketSource.c
* @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.
*/
#include <string.h>
#include <misc/debug.h>
#include "SinglePacketSource.h"
static void output_handler_recv (SinglePacketSource *o, uint8_t *data)
{
DebugObject_Access(&o->d_obj);
// if we already sent one packet, stop
if (o->sent) {
return;
}
// set sent
o->sent = 1;
// write packet
memcpy(data, o->packet, o->packet_len);
// done
PacketRecvInterface_Done(&o->output, o->packet_len);
}
void SinglePacketSource_Init (SinglePacketSource *o, uint8_t *packet, int packet_len, BPendingGroup *pg)
{
ASSERT(packet_len >= 0)
// init arguments
o->packet = packet;
o->packet_len = packet_len;
// set not sent
o->sent = 0;
// init output
PacketRecvInterface_Init(&o->output, o->packet_len, (PacketRecvInterface_handler_recv)output_handler_recv, o, pg);
DebugObject_Init(&o->d_obj);
}
void SinglePacketSource_Free (SinglePacketSource *o)
{
DebugObject_Free(&o->d_obj);
// free output
PacketRecvInterface_Free(&o->output);
}
PacketRecvInterface * SinglePacketSource_GetOutput (SinglePacketSource *o)
{
DebugObject_Access(&o->d_obj);
return &o->output;
}