BadVPN – Blame information for rev 1
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| Rev | Author | Line No. | Line |
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| 1 | office | 1 | /** |
| 2 | * @file SCOutmsgEncoder.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 <stddef.h> |
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| 31 | #include <limits.h> |
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| 32 | #include <string.h> |
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| 33 | |||
| 34 | #include <misc/balign.h> |
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| 35 | #include <misc/debug.h> |
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| 36 | #include <misc/byteorder.h> |
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| 37 | |||
| 38 | #include "SCOutmsgEncoder.h" |
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| 39 | |||
| 40 | static void output_handler_recv (SCOutmsgEncoder *o, uint8_t *data) |
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| 41 | { |
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| 42 | DebugObject_Access(&o->d_obj); |
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| 43 | ASSERT(!o->output_packet) |
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| 44 | ASSERT(data) |
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| 45 | |||
| 46 | // schedule receive |
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| 47 | o->output_packet = data; |
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| 48 | PacketRecvInterface_Receiver_Recv(o->input, o->output_packet + SCOUTMSG_OVERHEAD); |
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| 49 | } |
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| 50 | |||
| 51 | static void input_handler_done (SCOutmsgEncoder *o, int in_len) |
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| 52 | { |
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| 53 | DebugObject_Access(&o->d_obj); |
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| 54 | ASSERT(o->output_packet) |
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| 55 | |||
| 56 | // write SC header |
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| 57 | struct sc_header header; |
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| 58 | header.type = htol8(SCID_OUTMSG); |
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| 59 | memcpy(o->output_packet, &header, sizeof(header)); |
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| 60 | |||
| 61 | // write outmsg |
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| 62 | struct sc_client_outmsg outmsg; |
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| 63 | outmsg.clientid = htol16(o->peer_id); |
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| 64 | memcpy(o->output_packet + sizeof(header), &outmsg, sizeof(outmsg)); |
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| 65 | |||
| 66 | // finish output packet |
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| 67 | o->output_packet = NULL; |
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| 68 | PacketRecvInterface_Done(&o->output, SCOUTMSG_OVERHEAD + in_len); |
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| 69 | } |
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| 70 | |||
| 71 | void SCOutmsgEncoder_Init (SCOutmsgEncoder *o, peerid_t peer_id, PacketRecvInterface *input, BPendingGroup *pg) |
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| 72 | { |
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| 73 | ASSERT(PacketRecvInterface_GetMTU(input) <= INT_MAX - SCOUTMSG_OVERHEAD) |
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| 74 | |||
| 75 | // init arguments |
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| 76 | o->peer_id = peer_id; |
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| 77 | o->input = input; |
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| 78 | |||
| 79 | // init input |
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| 80 | PacketRecvInterface_Receiver_Init(o->input, (PacketRecvInterface_handler_done)input_handler_done, o); |
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| 81 | |||
| 82 | // init output |
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| 83 | PacketRecvInterface_Init(&o->output, SCOUTMSG_OVERHEAD + PacketRecvInterface_GetMTU(o->input), (PacketRecvInterface_handler_recv)output_handler_recv, o, pg); |
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| 84 | |||
| 85 | // set no output packet |
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| 86 | o->output_packet = NULL; |
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| 87 | |||
| 88 | DebugObject_Init(&o->d_obj); |
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| 89 | } |
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| 90 | |||
| 91 | void SCOutmsgEncoder_Free (SCOutmsgEncoder *o) |
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| 92 | { |
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| 93 | DebugObject_Free(&o->d_obj); |
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| 94 | |||
| 95 | // free input |
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| 96 | PacketRecvInterface_Free(&o->output); |
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| 97 | } |
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| 98 | |||
| 99 | PacketRecvInterface * SCOutmsgEncoder_GetOutput (SCOutmsgEncoder *o) |
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| 100 | { |
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| 101 | DebugObject_Access(&o->d_obj); |
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| 102 | |||
| 103 | return &o->output; |
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| 104 | } |