BadVPN – Blame information for rev 1
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1 | office | 1 | /** |
2 | * @file PacketStreamSender.c |
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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 | #include <stdlib.h> |
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31 | |||
32 | #include <misc/debug.h> |
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33 | |||
34 | #include <flow/PacketStreamSender.h> |
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35 | |||
36 | static void send_data (PacketStreamSender *s) |
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37 | { |
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38 | ASSERT(s->in_len >= 0) |
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39 | |||
40 | if (s->in_used < s->in_len) { |
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41 | // send more data |
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42 | StreamPassInterface_Sender_Send(s->output, s->in + s->in_used, s->in_len - s->in_used); |
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43 | } else { |
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44 | // finish input packet |
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45 | s->in_len = -1; |
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46 | PacketPassInterface_Done(&s->input); |
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47 | } |
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48 | } |
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49 | |||
50 | static void input_handler_send (PacketStreamSender *s, uint8_t *data, int data_len) |
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51 | { |
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52 | ASSERT(s->in_len == -1) |
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53 | ASSERT(data_len >= 0) |
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54 | DebugObject_Access(&s->d_obj); |
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55 | |||
56 | // set input packet |
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57 | s->in_len = data_len; |
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58 | s->in = data; |
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59 | s->in_used = 0; |
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60 | |||
61 | // send |
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62 | send_data(s); |
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63 | } |
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64 | |||
65 | static void output_handler_done (PacketStreamSender *s, int data_len) |
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66 | { |
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67 | ASSERT(s->in_len >= 0) |
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68 | ASSERT(data_len > 0) |
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69 | ASSERT(data_len <= s->in_len - s->in_used) |
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70 | DebugObject_Access(&s->d_obj); |
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71 | |||
72 | // update number of bytes sent |
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73 | s->in_used += data_len; |
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74 | |||
75 | // send |
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76 | send_data(s); |
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77 | } |
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78 | |||
79 | void PacketStreamSender_Init (PacketStreamSender *s, StreamPassInterface *output, int mtu, BPendingGroup *pg) |
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80 | { |
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81 | ASSERT(mtu >= 0) |
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82 | |||
83 | // init arguments |
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84 | s->output = output; |
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85 | |||
86 | // init input |
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87 | PacketPassInterface_Init(&s->input, mtu, (PacketPassInterface_handler_send)input_handler_send, s, pg); |
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88 | |||
89 | // init output |
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90 | StreamPassInterface_Sender_Init(s->output, (StreamPassInterface_handler_done)output_handler_done, s); |
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91 | |||
92 | // have no input packet |
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93 | s->in_len = -1; |
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94 | |||
95 | DebugObject_Init(&s->d_obj); |
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96 | } |
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97 | |||
98 | void PacketStreamSender_Free (PacketStreamSender *s) |
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99 | { |
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100 | DebugObject_Free(&s->d_obj); |
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101 | |||
102 | // free input |
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103 | PacketPassInterface_Free(&s->input); |
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104 | } |
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105 | |||
106 | PacketPassInterface * PacketStreamSender_GetInput (PacketStreamSender *s) |
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107 | { |
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108 | DebugObject_Access(&s->d_obj); |
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109 | |||
110 | return &s->input; |
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111 | } |