118 lines
3.3 KiB
C++
118 lines
3.3 KiB
C++
/*
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; Project: Open Vehicle Monitor System
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; Date: 14th March 2017
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;
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; Changes:
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; 1.0 Initial release
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;
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; (C) 2011 Michael Stegen / Stegen Electronics
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; (C) 2011-2017 Mark Webb-Johnson
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; (C) 2011 Sonny Chen @ EPRO/DX
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;
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; Permission is hereby granted, free of charge, to any person obtaining a copy
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; of this software and associated documentation files (the "Software"), to deal
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; in the Software without restriction, including without limitation the rights
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; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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; copies of the Software, and to permit persons to whom the Software is
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; furnished to do so, subject to the following conditions:
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;
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; The above copyright notice and this permission notice shall be included in
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; all copies or substantial portions of the Software.
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;
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; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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; THE SOFTWARE.
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*/
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#ifndef __GSM_MUX_H__
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#define __GSM_MUX_H__
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#include <vector>
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#include <unistd.h>
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#include "ovms.h"
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#include "ovms_buffer.h"
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class modem; // Forward declared
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class GsmMux; // Forward declared
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class GsmMuxChannel : public InternalRamAllocated
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{
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public:
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GsmMuxChannel(GsmMux* mux, int channel, size_t buffersize);
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~GsmMuxChannel();
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public:
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enum GsmMuxChannelState
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{
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ChanClosed, // DLCI closed
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ChanOpening, // SABM sent, awaiting UA
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ChanOpen, // DLCI open (SABM sent, UA received)
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ChanClosing // DISC sent, awaiting UA/DM
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};
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public:
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void ProcessFrame(uint8_t* frame, size_t length, size_t iframepos);
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public:
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GsmMuxChannelState m_state;
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GsmMux* m_mux;
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int m_channel;
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OvmsBuffer m_buffer;
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};
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class GsmMux : public InternalRamAllocated
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{
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public:
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GsmMux(modem* m, int channelcount, size_t maxframesize = 2048);
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~GsmMux();
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public:
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void Startup();
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void Shutdown();
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void StartChannel(int channel);
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void StopChannel(int channel);
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void Process(OvmsBuffer* buf);
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void ProcessFrame();
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size_t tx(int channel, uint8_t* data, ssize_t size);
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size_t tx(int channel, const char* data, ssize_t size = -1);
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bool IsChannelOpen(int channel);
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bool IsMuxUp();
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uint32_t GoodFrameAge();
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protected:
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void txfcs(uint8_t* data, size_t size, size_t ipos = 4);
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public:
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enum GsmMuxState
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{
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DlciClosed, // DLCI closed
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DlciOpening, // SABM sent, awaiting UA
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DlciOpen, // DLCI open (SABM sent, UA received)
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DlciClosing // DISC sent, awaiting UA/DM
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};
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public:
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GsmMuxState m_state;
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int m_channelcount;
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int m_openchannels;
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uint32_t m_framingerrors;
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uint32_t m_lastgoodrxframe;
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uint32_t m_rxframecount;
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uint32_t m_txframecount;
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public:
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modem* m_modem;
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uint8_t* m_frame;
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size_t m_framesize;
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size_t m_framepos;
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size_t m_frameipos;
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size_t m_framelen;
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bool m_framemorelen;
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std::vector<GsmMuxChannel*> m_channels;
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};
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#endif //#ifndef __GSM_MUX__
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