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1 office 1 /**
2 * @file StreamPacketSender.c
3 * @author Ambroz Bizjak <ambrop7@gmail.com>
4 *
5 * @section LICENSE
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the author nor the
15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29  
30 #include <misc/debug.h>
31  
32 #include "StreamPacketSender.h"
33  
34 static void input_handler_send (StreamPacketSender *o, uint8_t *data, int data_len)
35 {
36 DebugObject_Access(&o->d_obj);
37 ASSERT(data_len > 0)
38  
39 // limit length to MTU and remember
40 if (data_len > o->output_mtu) {
41 o->sending_len = o->output_mtu;
42 } else {
43 o->sending_len = data_len;
44 }
45  
46 // send
47 PacketPassInterface_Sender_Send(o->output, data, o->sending_len);
48 }
49  
50 static void output_handler_done (StreamPacketSender *o)
51 {
52 DebugObject_Access(&o->d_obj);
53  
54 // done
55 StreamPassInterface_Done(&o->input, o->sending_len);
56 }
57  
58 void StreamPacketSender_Init (StreamPacketSender *o, PacketPassInterface *output, BPendingGroup *pg)
59 {
60 ASSERT(PacketPassInterface_GetMTU(output) > 0)
61  
62 // init arguments
63 o->output = output;
64  
65 // remember output MTU
66 o->output_mtu = PacketPassInterface_GetMTU(output);
67  
68 // init input
69 StreamPassInterface_Init(&o->input, (StreamPassInterface_handler_send)input_handler_send, o, pg);
70  
71 // init output
72 PacketPassInterface_Sender_Init(o->output, (PacketPassInterface_handler_done)output_handler_done, o);
73  
74 DebugObject_Init(&o->d_obj);
75 }
76  
77 void StreamPacketSender_Free (StreamPacketSender *o)
78 {
79 DebugObject_Free(&o->d_obj);
80  
81 // free input
82 StreamPassInterface_Free(&o->input);
83 }
84  
85 StreamPassInterface * StreamPacketSender_GetInput (StreamPacketSender *o)
86 {
87 DebugObject_Access(&o->d_obj);
88  
89 return &o->input;
90 }