BadVPN – Blame information for rev 1
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1 | office | 1 | /** |
2 | * @file PacketBuffer.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 | * @section DESCRIPTION |
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30 | * |
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31 | * Packet buffer with {@link PacketRecvInterface} input and {@link PacketPassInterface} output. |
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32 | */ |
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33 | |||
34 | #ifndef BADVPN_FLOW_PACKETBUFFER_H |
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35 | #define BADVPN_FLOW_PACKETBUFFER_H |
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36 | |||
37 | #include <stdint.h> |
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38 | |||
39 | #include <misc/debug.h> |
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40 | #include <base/DebugObject.h> |
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41 | #include <structure/ChunkBuffer2.h> |
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42 | #include <flow/PacketRecvInterface.h> |
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43 | #include <flow/PacketPassInterface.h> |
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44 | |||
45 | /** |
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46 | * Packet buffer with {@link PacketRecvInterface} input and {@link PacketPassInterface} output. |
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47 | */ |
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48 | typedef struct { |
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49 | DebugObject d_obj; |
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50 | PacketRecvInterface *input; |
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51 | int input_mtu; |
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52 | PacketPassInterface *output; |
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53 | struct ChunkBuffer2_block *buf_data; |
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54 | ChunkBuffer2 buf; |
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55 | } PacketBuffer; |
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56 | |||
57 | /** |
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58 | * Initializes the buffer. |
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59 | * Output MTU must be >= input MTU. |
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60 | * |
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61 | * @param buf the object |
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62 | * @param input input interface |
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63 | * @param output output interface |
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64 | * @param num_packets minimum number of packets the buffer must hold. Must be >0. |
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65 | * @param pg pending group |
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66 | * @return 1 on success, 0 on failure |
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67 | */ |
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68 | int PacketBuffer_Init (PacketBuffer *buf, PacketRecvInterface *input, PacketPassInterface *output, int num_packets, BPendingGroup *pg) WARN_UNUSED; |
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69 | |||
70 | /** |
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71 | * Frees the buffer. |
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72 | * |
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73 | * @param buf the object |
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74 | */ |
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75 | void PacketBuffer_Free (PacketBuffer *buf); |
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76 | |||
77 | #endif |