BadVPN – Blame information for rev 1
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1 | office | 1 | /** |
2 | * @file PacketRecvInterface.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 | * Interface allowing a packet receiver to receive data packets from a packet sender. |
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32 | */ |
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33 | |||
34 | #ifndef BADVPN_FLOW_PACKETRECVINTERFACE_H |
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35 | #define BADVPN_FLOW_PACKETRECVINTERFACE_H |
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36 | |||
37 | #include <stdint.h> |
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38 | #include <stddef.h> |
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39 | |||
40 | #include <misc/debug.h> |
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41 | #include <base/DebugObject.h> |
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42 | #include <base/BPending.h> |
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43 | |||
44 | #define PRI_STATE_NONE 1 |
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45 | #define PRI_STATE_OPERATION_PENDING 2 |
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46 | #define PRI_STATE_BUSY 3 |
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47 | #define PRI_STATE_DONE_PENDING 4 |
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48 | |||
49 | typedef void (*PacketRecvInterface_handler_recv) (void *user, uint8_t *data); |
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50 | |||
51 | typedef void (*PacketRecvInterface_handler_done) (void *user, int data_len); |
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52 | |||
53 | typedef struct { |
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54 | // provider data |
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55 | int mtu; |
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56 | PacketRecvInterface_handler_recv handler_operation; |
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57 | void *user_provider; |
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58 | |||
59 | // user data |
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60 | PacketRecvInterface_handler_done handler_done; |
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61 | void *user_user; |
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62 | |||
63 | // operation job |
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64 | BPending job_operation; |
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65 | uint8_t *job_operation_data; |
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66 | |||
67 | // done job |
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68 | BPending job_done; |
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69 | int job_done_len; |
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70 | |||
71 | // state |
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72 | int state; |
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73 | |||
74 | DebugObject d_obj; |
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75 | } PacketRecvInterface; |
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76 | |||
77 | static void PacketRecvInterface_Init (PacketRecvInterface *i, int mtu, PacketRecvInterface_handler_recv handler_operation, void *user, BPendingGroup *pg); |
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78 | |||
79 | static void PacketRecvInterface_Free (PacketRecvInterface *i); |
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80 | |||
81 | static void PacketRecvInterface_Done (PacketRecvInterface *i, int data_len); |
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82 | |||
83 | static int PacketRecvInterface_GetMTU (PacketRecvInterface *i); |
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84 | |||
85 | static void PacketRecvInterface_Receiver_Init (PacketRecvInterface *i, PacketRecvInterface_handler_done handler_done, void *user); |
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86 | |||
87 | static void PacketRecvInterface_Receiver_Recv (PacketRecvInterface *i, uint8_t *data); |
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88 | |||
89 | void _PacketRecvInterface_job_operation (PacketRecvInterface *i); |
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90 | void _PacketRecvInterface_job_done (PacketRecvInterface *i); |
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91 | |||
92 | void PacketRecvInterface_Init (PacketRecvInterface *i, int mtu, PacketRecvInterface_handler_recv handler_operation, void *user, BPendingGroup *pg) |
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93 | { |
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94 | ASSERT(mtu >= 0) |
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95 | |||
96 | // init arguments |
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97 | i->mtu = mtu; |
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98 | i->handler_operation = handler_operation; |
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99 | i->user_provider = user; |
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100 | |||
101 | // set no user |
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102 | i->handler_done = NULL; |
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103 | |||
104 | // init jobs |
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105 | BPending_Init(&i->job_operation, pg, (BPending_handler)_PacketRecvInterface_job_operation, i); |
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106 | BPending_Init(&i->job_done, pg, (BPending_handler)_PacketRecvInterface_job_done, i); |
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107 | |||
108 | // set state |
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109 | i->state = PRI_STATE_NONE; |
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110 | |||
111 | DebugObject_Init(&i->d_obj); |
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112 | } |
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113 | |||
114 | void PacketRecvInterface_Free (PacketRecvInterface *i) |
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115 | { |
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116 | DebugObject_Free(&i->d_obj); |
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117 | |||
118 | // free jobs |
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119 | BPending_Free(&i->job_done); |
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120 | BPending_Free(&i->job_operation); |
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121 | } |
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122 | |||
123 | void PacketRecvInterface_Done (PacketRecvInterface *i, int data_len) |
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124 | { |
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125 | ASSERT(data_len >= 0) |
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126 | ASSERT(data_len <= i->mtu) |
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127 | ASSERT(i->state == PRI_STATE_BUSY) |
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128 | DebugObject_Access(&i->d_obj); |
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129 | |||
130 | // schedule done |
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131 | i->job_done_len = data_len; |
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132 | BPending_Set(&i->job_done); |
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133 | |||
134 | // set state |
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135 | i->state = PRI_STATE_DONE_PENDING; |
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136 | } |
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137 | |||
138 | int PacketRecvInterface_GetMTU (PacketRecvInterface *i) |
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139 | { |
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140 | DebugObject_Access(&i->d_obj); |
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141 | |||
142 | return i->mtu; |
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143 | } |
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144 | |||
145 | void PacketRecvInterface_Receiver_Init (PacketRecvInterface *i, PacketRecvInterface_handler_done handler_done, void *user) |
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146 | { |
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147 | ASSERT(handler_done) |
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148 | ASSERT(!i->handler_done) |
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149 | DebugObject_Access(&i->d_obj); |
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150 | |||
151 | i->handler_done = handler_done; |
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152 | i->user_user = user; |
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153 | } |
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154 | |||
155 | void PacketRecvInterface_Receiver_Recv (PacketRecvInterface *i, uint8_t *data) |
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156 | { |
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157 | ASSERT(!(i->mtu > 0) || data) |
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158 | ASSERT(i->state == PRI_STATE_NONE) |
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159 | ASSERT(i->handler_done) |
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160 | DebugObject_Access(&i->d_obj); |
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161 | |||
162 | // schedule operation |
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163 | i->job_operation_data = data; |
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164 | BPending_Set(&i->job_operation); |
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165 | |||
166 | // set state |
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167 | i->state = PRI_STATE_OPERATION_PENDING; |
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168 | } |
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169 | |||
170 | #endif |