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1 office 1 /**
2 * @file SinglePacketSource.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 <string.h>
31  
32 #include <misc/debug.h>
33  
34 #include "SinglePacketSource.h"
35  
36 static void output_handler_recv (SinglePacketSource *o, uint8_t *data)
37 {
38 DebugObject_Access(&o->d_obj);
39  
40 // if we already sent one packet, stop
41 if (o->sent) {
42 return;
43 }
44  
45 // set sent
46 o->sent = 1;
47  
48 // write packet
49 memcpy(data, o->packet, o->packet_len);
50  
51 // done
52 PacketRecvInterface_Done(&o->output, o->packet_len);
53 }
54  
55 void SinglePacketSource_Init (SinglePacketSource *o, uint8_t *packet, int packet_len, BPendingGroup *pg)
56 {
57 ASSERT(packet_len >= 0)
58  
59 // init arguments
60 o->packet = packet;
61 o->packet_len = packet_len;
62  
63 // set not sent
64 o->sent = 0;
65  
66 // init output
67 PacketRecvInterface_Init(&o->output, o->packet_len, (PacketRecvInterface_handler_recv)output_handler_recv, o, pg);
68  
69 DebugObject_Init(&o->d_obj);
70 }
71  
72 void SinglePacketSource_Free (SinglePacketSource *o)
73 {
74 DebugObject_Free(&o->d_obj);
75  
76 // free output
77 PacketRecvInterface_Free(&o->output);
78 }
79  
80 PacketRecvInterface * SinglePacketSource_GetOutput (SinglePacketSource *o)
81 {
82 DebugObject_Access(&o->d_obj);
83  
84 return &o->output;
85 }