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1 office 1 /**
2 * @file PacketProtoFlow.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 <protocol/packetproto.h>
31 #include <misc/debug.h>
32  
33 #include <flow/PacketProtoFlow.h>
34  
35 int PacketProtoFlow_Init (PacketProtoFlow *o, int input_mtu, int num_packets, PacketPassInterface *output, BPendingGroup *pg)
36 {
37 ASSERT(input_mtu >= 0)
38 ASSERT(input_mtu <= PACKETPROTO_MAXPAYLOAD)
39 ASSERT(num_packets > 0)
40 ASSERT(PacketPassInterface_GetMTU(output) >= PACKETPROTO_ENCLEN(input_mtu))
41  
42 // init async input
43 BufferWriter_Init(&o->ainput, input_mtu, pg);
44  
45 // init encoder
46 PacketProtoEncoder_Init(&o->encoder, BufferWriter_GetOutput(&o->ainput), pg);
47  
48 // init buffer
49 if (!PacketBuffer_Init(&o->buffer, PacketProtoEncoder_GetOutput(&o->encoder), output, num_packets, pg)) {
50 goto fail0;
51 }
52  
53 DebugObject_Init(&o->d_obj);
54  
55 return 1;
56  
57 fail0:
58 PacketProtoEncoder_Free(&o->encoder);
59 BufferWriter_Free(&o->ainput);
60 return 0;
61 }
62  
63 void PacketProtoFlow_Free (PacketProtoFlow *o)
64 {
65 DebugObject_Free(&o->d_obj);
66  
67 // free buffer
68 PacketBuffer_Free(&o->buffer);
69  
70 // free encoder
71 PacketProtoEncoder_Free(&o->encoder);
72  
73 // free async input
74 BufferWriter_Free(&o->ainput);
75 }
76  
77 BufferWriter * PacketProtoFlow_GetInput (PacketProtoFlow *o)
78 {
79 DebugObject_Access(&o->d_obj);
80  
81 return &o->ainput;
82 }