102 lines
3.4 KiB
C
102 lines
3.4 KiB
C
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/**
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* @file PacketProtoEncoder.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 <stddef.h>
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#include <string.h>
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#include <protocol/packetproto.h>
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#include <misc/balign.h>
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#include <misc/debug.h>
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#include <misc/byteorder.h>
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#include <flow/PacketProtoEncoder.h>
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static void output_handler_recv (PacketProtoEncoder *enc, uint8_t *data)
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{
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ASSERT(!enc->output_packet)
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ASSERT(data)
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DebugObject_Access(&enc->d_obj);
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// schedule receive
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enc->output_packet = data;
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PacketRecvInterface_Receiver_Recv(enc->input, enc->output_packet + sizeof(struct packetproto_header));
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}
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static void input_handler_done (PacketProtoEncoder *enc, int in_len)
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{
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ASSERT(enc->output_packet)
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DebugObject_Access(&enc->d_obj);
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// write length
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struct packetproto_header pp;
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pp.len = htol16(in_len);
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memcpy(enc->output_packet, &pp, sizeof(pp));
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// finish output packet
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enc->output_packet = NULL;
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PacketRecvInterface_Done(&enc->output, PACKETPROTO_ENCLEN(in_len));
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}
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void PacketProtoEncoder_Init (PacketProtoEncoder *enc, PacketRecvInterface *input, BPendingGroup *pg)
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{
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ASSERT(PacketRecvInterface_GetMTU(input) <= PACKETPROTO_MAXPAYLOAD)
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// init arguments
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enc->input = input;
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// init input
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PacketRecvInterface_Receiver_Init(enc->input, (PacketRecvInterface_handler_done)input_handler_done, enc);
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// init output
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PacketRecvInterface_Init(
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&enc->output, PACKETPROTO_ENCLEN(PacketRecvInterface_GetMTU(enc->input)),
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(PacketRecvInterface_handler_recv)output_handler_recv, enc, pg
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);
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// set no output packet
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enc->output_packet = NULL;
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DebugObject_Init(&enc->d_obj);
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}
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void PacketProtoEncoder_Free (PacketProtoEncoder *enc)
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{
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DebugObject_Free(&enc->d_obj);
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// free input
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PacketRecvInterface_Free(&enc->output);
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}
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PacketRecvInterface * PacketProtoEncoder_GetOutput (PacketProtoEncoder *enc)
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{
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DebugObject_Access(&enc->d_obj);
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return &enc->output;
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}
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