tor-android/external/badvpn_dns/flow/PacketProtoFlow.c

83 lines
2.8 KiB
C

/**
* @file PacketProtoFlow.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 <protocol/packetproto.h>
#include <misc/debug.h>
#include <flow/PacketProtoFlow.h>
int PacketProtoFlow_Init (PacketProtoFlow *o, int input_mtu, int num_packets, PacketPassInterface *output, BPendingGroup *pg)
{
ASSERT(input_mtu >= 0)
ASSERT(input_mtu <= PACKETPROTO_MAXPAYLOAD)
ASSERT(num_packets > 0)
ASSERT(PacketPassInterface_GetMTU(output) >= PACKETPROTO_ENCLEN(input_mtu))
// init async input
BufferWriter_Init(&o->ainput, input_mtu, pg);
// init encoder
PacketProtoEncoder_Init(&o->encoder, BufferWriter_GetOutput(&o->ainput), pg);
// init buffer
if (!PacketBuffer_Init(&o->buffer, PacketProtoEncoder_GetOutput(&o->encoder), output, num_packets, pg)) {
goto fail0;
}
DebugObject_Init(&o->d_obj);
return 1;
fail0:
PacketProtoEncoder_Free(&o->encoder);
BufferWriter_Free(&o->ainput);
return 0;
}
void PacketProtoFlow_Free (PacketProtoFlow *o)
{
DebugObject_Free(&o->d_obj);
// free buffer
PacketBuffer_Free(&o->buffer);
// free encoder
PacketProtoEncoder_Free(&o->encoder);
// free async input
BufferWriter_Free(&o->ainput);
}
BufferWriter * PacketProtoFlow_GetInput (PacketProtoFlow *o)
{
DebugObject_Access(&o->d_obj);
return &o->ainput;
}