mirror of https://github.com/LeOS-GSI/LeOS-Genesis
112 lines
3.4 KiB
C
112 lines
3.4 KiB
C
/**
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* @file PacketStreamSender.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 <stdlib.h>
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#include <misc/debug.h>
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#include <flow/PacketStreamSender.h>
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static void send_data (PacketStreamSender *s)
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{
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ASSERT(s->in_len >= 0)
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if (s->in_used < s->in_len) {
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// send more data
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StreamPassInterface_Sender_Send(s->output, s->in + s->in_used, s->in_len - s->in_used);
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} else {
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// finish input packet
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s->in_len = -1;
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PacketPassInterface_Done(&s->input);
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}
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}
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static void input_handler_send (PacketStreamSender *s, uint8_t *data, int data_len)
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{
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ASSERT(s->in_len == -1)
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ASSERT(data_len >= 0)
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DebugObject_Access(&s->d_obj);
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// set input packet
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s->in_len = data_len;
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s->in = data;
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s->in_used = 0;
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// send
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send_data(s);
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}
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static void output_handler_done (PacketStreamSender *s, int data_len)
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{
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ASSERT(s->in_len >= 0)
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ASSERT(data_len > 0)
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ASSERT(data_len <= s->in_len - s->in_used)
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DebugObject_Access(&s->d_obj);
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// update number of bytes sent
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s->in_used += data_len;
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// send
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send_data(s);
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}
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void PacketStreamSender_Init (PacketStreamSender *s, StreamPassInterface *output, int mtu, BPendingGroup *pg)
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{
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ASSERT(mtu >= 0)
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// init arguments
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s->output = output;
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// init input
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PacketPassInterface_Init(&s->input, mtu, (PacketPassInterface_handler_send)input_handler_send, s, pg);
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// init output
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StreamPassInterface_Sender_Init(s->output, (StreamPassInterface_handler_done)output_handler_done, s);
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// have no input packet
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s->in_len = -1;
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DebugObject_Init(&s->d_obj);
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}
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void PacketStreamSender_Free (PacketStreamSender *s)
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{
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DebugObject_Free(&s->d_obj);
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// free input
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PacketPassInterface_Free(&s->input);
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}
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PacketPassInterface * PacketStreamSender_GetInput (PacketStreamSender *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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