BadVPN – Blame information for rev 1
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| Rev | Author | Line No. | Line |
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| 1 | office | 1 | /** |
| 2 | * @file KeepaliveIO.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 <misc/debug.h> |
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| 31 | |||
| 32 | #include "KeepaliveIO.h" |
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| 33 | |||
| 34 | static void keepalive_handler (KeepaliveIO *o) |
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| 35 | { |
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| 36 | DebugObject_Access(&o->d_obj); |
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| 37 | |||
| 38 | PacketRecvBlocker_AllowBlockedPacket(&o->ka_blocker); |
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| 39 | } |
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| 40 | |||
| 41 | int KeepaliveIO_Init (KeepaliveIO *o, BReactor *reactor, PacketPassInterface *output, PacketRecvInterface *keepalive_input, btime_t keepalive_interval_ms) |
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| 42 | { |
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| 43 | ASSERT(PacketRecvInterface_GetMTU(keepalive_input) <= PacketPassInterface_GetMTU(output)) |
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| 44 | ASSERT(keepalive_interval_ms > 0) |
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| 45 | |||
| 46 | // set arguments |
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| 47 | o->reactor = reactor; |
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| 48 | |||
| 49 | // init keep-alive sender |
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| 50 | PacketPassInactivityMonitor_Init(&o->kasender, output, o->reactor, keepalive_interval_ms, (PacketPassInactivityMonitor_handler)keepalive_handler, o); |
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| 51 | |||
| 52 | // init queue |
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| 53 | PacketPassPriorityQueue_Init(&o->queue, PacketPassInactivityMonitor_GetInput(&o->kasender), BReactor_PendingGroup(o->reactor), 0); |
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| 54 | |||
| 55 | // init keepalive flow |
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| 56 | PacketPassPriorityQueueFlow_Init(&o->ka_qflow, &o->queue, -1); |
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| 57 | |||
| 58 | // init keepalive blocker |
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| 59 | PacketRecvBlocker_Init(&o->ka_blocker, keepalive_input, BReactor_PendingGroup(reactor)); |
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| 60 | |||
| 61 | // init keepalive buffer |
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| 62 | if (!SinglePacketBuffer_Init(&o->ka_buffer, PacketRecvBlocker_GetOutput(&o->ka_blocker), PacketPassPriorityQueueFlow_GetInput(&o->ka_qflow), BReactor_PendingGroup(o->reactor))) { |
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| 63 | goto fail1; |
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| 64 | } |
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| 65 | |||
| 66 | // init user flow |
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| 67 | PacketPassPriorityQueueFlow_Init(&o->user_qflow, &o->queue, 0); |
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| 68 | |||
| 69 | DebugObject_Init(&o->d_obj); |
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| 70 | |||
| 71 | return 1; |
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| 72 | |||
| 73 | fail1: |
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| 74 | PacketRecvBlocker_Free(&o->ka_blocker); |
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| 75 | PacketPassPriorityQueueFlow_Free(&o->ka_qflow); |
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| 76 | PacketPassPriorityQueue_Free(&o->queue); |
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| 77 | PacketPassInactivityMonitor_Free(&o->kasender); |
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| 78 | return 0; |
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| 79 | } |
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| 80 | |||
| 81 | void KeepaliveIO_Free (KeepaliveIO *o) |
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| 82 | { |
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| 83 | DebugObject_Free(&o->d_obj); |
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| 84 | |||
| 85 | // allow freeing queue flows |
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| 86 | PacketPassPriorityQueue_PrepareFree(&o->queue); |
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| 87 | |||
| 88 | // free user flow |
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| 89 | PacketPassPriorityQueueFlow_Free(&o->user_qflow); |
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| 90 | |||
| 91 | // free keepalive buffer |
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| 92 | SinglePacketBuffer_Free(&o->ka_buffer); |
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| 93 | |||
| 94 | // free keepalive blocker |
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| 95 | PacketRecvBlocker_Free(&o->ka_blocker); |
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| 96 | |||
| 97 | // free keepalive flow |
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| 98 | PacketPassPriorityQueueFlow_Free(&o->ka_qflow); |
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| 99 | |||
| 100 | // free queue |
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| 101 | PacketPassPriorityQueue_Free(&o->queue); |
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| 102 | |||
| 103 | // free keep-alive sender |
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| 104 | PacketPassInactivityMonitor_Free(&o->kasender); |
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| 105 | } |
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| 106 | |||
| 107 | PacketPassInterface * KeepaliveIO_GetInput (KeepaliveIO *o) |
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| 108 | { |
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| 109 | DebugObject_Access(&o->d_obj); |
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| 110 | |||
| 111 | return PacketPassPriorityQueueFlow_GetInput(&o->user_qflow); |
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| 112 | } |