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1 office 1 /**
2 * @file PacketPassNotifier.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 <stddef.h>
31  
32 #include <flow/PacketPassNotifier.h>
33  
34 void input_handler_send (PacketPassNotifier *o, uint8_t *data, int data_len)
35 {
36 DebugObject_Access(&o->d_obj);
37  
38 // schedule send
39 PacketPassInterface_Sender_Send(o->output, data, data_len);
40  
41 // if we have a handler, call it
42 if (o->handler) {
43 o->handler(o->handler_user, data, data_len);
44 return;
45 }
46 }
47  
48 void input_handler_requestcancel (PacketPassNotifier *o)
49 {
50 DebugObject_Access(&o->d_obj);
51  
52 PacketPassInterface_Sender_RequestCancel(o->output);
53 }
54  
55 void output_handler_done (PacketPassNotifier *o)
56 {
57 DebugObject_Access(&o->d_obj);
58  
59 PacketPassInterface_Done(&o->input);
60 }
61  
62 void PacketPassNotifier_Init (PacketPassNotifier *o, PacketPassInterface *output, BPendingGroup *pg)
63 {
64 // init arguments
65 o->output = output;
66  
67 // init input
68 PacketPassInterface_Init(&o->input, PacketPassInterface_GetMTU(o->output), (PacketPassInterface_handler_send)input_handler_send, o, pg);
69 if (PacketPassInterface_HasCancel(o->output)) {
70 PacketPassInterface_EnableCancel(&o->input, (PacketPassInterface_handler_requestcancel)input_handler_requestcancel);
71 }
72  
73 // init output
74 PacketPassInterface_Sender_Init(o->output, (PacketPassInterface_handler_done)output_handler_done, o);
75  
76 // set no handler
77 o->handler = NULL;
78  
79 DebugObject_Init(&o->d_obj);
80 }
81  
82 void PacketPassNotifier_Free (PacketPassNotifier *o)
83 {
84 DebugObject_Free(&o->d_obj);
85  
86 // free input
87 PacketPassInterface_Free(&o->input);
88 }
89  
90 PacketPassInterface * PacketPassNotifier_GetInput (PacketPassNotifier *o)
91 {
92 DebugObject_Access(&o->d_obj);
93  
94 return &o->input;
95 }
96  
97 void PacketPassNotifier_SetHandler (PacketPassNotifier *o, PacketPassNotifier_handler_notify handler, void *user)
98 {
99 DebugObject_Access(&o->d_obj);
100  
101 o->handler = handler;
102 o->handler_user = user;
103 }