BadVPN – Blame information for rev 1
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| Rev | Author | Line No. | Line |
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| 1 | office | 1 | /** |
| 2 | * @file RandomPacketSink.h |
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| 3 | * @author Ambroz Bizjak <ambrop7@gmail.com> |
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| 4 | * |
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| 5 | * @section LICENSE |
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| 6 | * |
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| 7 | * Redistribution and use in source and binary forms, with or without |
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| 8 | * modification, are permitted provided that the following conditions are met: |
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| 9 | * 1. Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * 3. Neither the name of the author nor the |
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| 15 | * names of its contributors may be used to endorse or promote products |
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| 16 | * derived from this software without specific prior written permission. |
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| 17 | * |
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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| 19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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| 20 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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| 21 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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| 22 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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| 23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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| 24 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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| 25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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| 27 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 28 | */ |
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| 29 | |||
| 30 | #ifndef _RANDOMPACKETSINK_H |
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| 31 | #define _RANDOMPACKETSINK_H |
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| 32 | |||
| 33 | #include <stdio.h> |
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| 34 | |||
| 35 | #include <misc/debug.h> |
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| 36 | #include <security/BRandom.h> |
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| 37 | #include <system/BReactor.h> |
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| 38 | #include <base/DebugObject.h> |
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| 39 | #include <flow/PacketPassInterface.h> |
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| 40 | |||
| 41 | typedef struct { |
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| 42 | BReactor *reactor; |
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| 43 | PacketPassInterface input; |
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| 44 | BTimer timer; |
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| 45 | DebugObject d_obj; |
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| 46 | } RandomPacketSink; |
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| 47 | |||
| 48 | static void _RandomPacketSink_input_handler_send (RandomPacketSink *s, uint8_t *data, int data_len) |
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| 49 | { |
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| 50 | DebugObject_Access(&s->d_obj); |
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| 51 | |||
| 52 | printf("sink: send '"); |
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| 53 | size_t res = fwrite(data, data_len, 1, stdout); |
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| 54 | B_USE(res) |
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| 55 | |||
| 56 | uint8_t r; |
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| 57 | BRandom_randomize(&r, sizeof(r)); |
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| 58 | if (r&(uint8_t)1) { |
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| 59 | printf("' accepting\n"); |
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| 60 | PacketPassInterface_Done(&s->input); |
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| 61 | } else { |
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| 62 | printf("' delaying\n"); |
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| 63 | BReactor_SetTimer(s->reactor, &s->timer); |
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| 64 | } |
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| 65 | } |
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| 66 | |||
| 67 | static void _RandomPacketSink_input_handler_requestcancel (RandomPacketSink *s) |
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| 68 | { |
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| 69 | DebugObject_Access(&s->d_obj); |
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| 70 | |||
| 71 | printf("sink: cancelled\n"); |
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| 72 | BReactor_RemoveTimer(s->reactor, &s->timer); |
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| 73 | PacketPassInterface_Done(&s->input); |
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| 74 | } |
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| 75 | |||
| 76 | static void _RandomPacketSink_timer_handler (RandomPacketSink *s) |
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| 77 | { |
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| 78 | DebugObject_Access(&s->d_obj); |
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| 79 | |||
| 80 | PacketPassInterface_Done(&s->input); |
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| 81 | } |
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| 82 | |||
| 83 | static void RandomPacketSink_Init (RandomPacketSink *s, BReactor *reactor, int mtu, int ms) |
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| 84 | { |
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| 85 | // init arguments |
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| 86 | s->reactor = reactor; |
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| 87 | |||
| 88 | // init input |
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| 89 | PacketPassInterface_Init(&s->input, mtu, (PacketPassInterface_handler_send)_RandomPacketSink_input_handler_send, s, BReactor_PendingGroup(reactor)); |
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| 90 | PacketPassInterface_EnableCancel(&s->input, (PacketPassInterface_handler_requestcancel)_RandomPacketSink_input_handler_requestcancel); |
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| 91 | |||
| 92 | // init timer |
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| 93 | BTimer_Init(&s->timer, ms, (BTimer_handler)_RandomPacketSink_timer_handler, s); |
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| 94 | |||
| 95 | DebugObject_Init(&s->d_obj); |
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| 96 | } |
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| 97 | |||
| 98 | static void RandomPacketSink_Free (RandomPacketSink *s) |
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| 99 | { |
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| 100 | DebugObject_Free(&s->d_obj); |
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| 101 | |||
| 102 | // free timer |
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| 103 | BReactor_RemoveTimer(s->reactor, &s->timer); |
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| 104 | |||
| 105 | // free input |
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| 106 | PacketPassInterface_Free(&s->input); |
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| 107 | } |
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| 108 | |||
| 109 | static PacketPassInterface * RandomPacketSink_GetInput (RandomPacketSink *s) |
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| 110 | { |
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| 111 | DebugObject_Access(&s->d_obj); |
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| 112 | |||
| 113 | return &s->input; |
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| 114 | } |
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| 115 | |||
| 116 | #endif |