![paulc](/assets/img/avatar_default.png)
Support for line completion on TAB key. The Windows telnet client should be happy with line endings. git-svn-id: http://voip.null.ro/svn/yate@1076 acf43c95-373e-0410-b603-e72c3f656dc1
685 lines
18 KiB
C++
685 lines
18 KiB
C++
/**
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* faxchan.cpp
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* This file is part of the YATE Project http://YATE.null.ro
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*
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* This module is based on SpanDSP (a series of DSP components for telephony),
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* written by Steve Underwood <steveu@coppice.org>.
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*
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* This great software can be found at http://soft-switch.org/
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*
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* Fax driver (transmission+receiving)
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*
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* Yet Another Telephony Engine - a fully featured software PBX and IVR
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* Copyright (C) 2004-2006 Null Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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// For SpanDSP we have to ask for various C99 stuff
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#define __STDC_LIMIT_MACROS
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#include <math.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <spandsp.h>
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#include <yatephone.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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using namespace TelEngine;
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namespace { // anonymous
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#define FAX_DATA_CHUNK 320
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#define T38_DATA_CHUNK 160
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class FaxWrapper;
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// A thread to run the fax data
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class FaxThread : public Thread
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{
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public:
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inline FaxThread(FaxWrapper* wrapper)
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: Thread("Fax"), m_wrap(wrapper)
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{ }
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virtual void run();
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private:
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RefPointer<FaxWrapper> m_wrap;
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};
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class FaxSource : public DataSource
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{
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public:
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FaxSource(FaxWrapper* wrapper, const char* format = "slin");
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~FaxSource();
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private:
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RefPointer<FaxWrapper> m_wrap;
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};
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class FaxConsumer : public DataConsumer
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{
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public:
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FaxConsumer(FaxWrapper* wrapper, const char* format = "slin");
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~FaxConsumer();
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virtual void Consume(const DataBlock& data, unsigned long tStamp);
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private:
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RefPointer<FaxWrapper> m_wrap;
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};
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// This class encapsulates an abstract T.30 fax interface
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class FaxWrapper : public RefObject, public Mutex, public DebugEnabler
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{
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friend class FaxSource;
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friend class FaxConsumer;
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public:
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void debugName(const char* name);
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void setECM(bool enable);
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bool startup(CallEndpoint* chan = 0);
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virtual void cleanup();
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virtual void run() = 0;
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virtual void rxData(const DataBlock& data, unsigned long tStamp) = 0;
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void phaseB(int result);
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void phaseD(int result);
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void phaseE(int result);
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inline t30_state_t* t30() const
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{ return m_t30; }
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inline bool eof() const
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{ return m_eof; }
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protected:
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FaxWrapper();
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void init(t30_state_t* t30, const char* ident, const char* file, bool sender);
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String m_name;
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t30_state_t* m_t30;
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FaxSource* m_source;
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FaxConsumer* m_consumer;
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CallEndpoint* m_chan;
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bool m_eof;
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};
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// An audio fax terminal, sends or receives a local file
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class FaxTerminal : public FaxWrapper
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{
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public:
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FaxTerminal(const char *file, const char *ident, bool sender, bool iscaller);
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virtual ~FaxTerminal();
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virtual void run();
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virtual void rxData(const DataBlock& data, unsigned long tStamp);
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private:
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void rxBlock(void *buff, int len);
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int txBlock();
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fax_state_t m_fax;
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int m_lastr;
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};
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// A digital fax terminal
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class T38Terminal : public FaxWrapper
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{
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public:
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T38Terminal(const char *file, const char *ident, bool sender, bool iscaller);
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virtual ~T38Terminal();
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virtual void run();
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virtual void rxData(const DataBlock& data, unsigned long tStamp);
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private:
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int txData(const void* buf, int len, int seq, int count);
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static int txHandler(t38_core_state_t* t38s, void* userData,
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const uint8_t* buf, int len, int count);
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t38_terminal_state_t m_t38;
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};
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// A gateway between analogic and digital fax
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class T38Gatway : public FaxWrapper
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{
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private:
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t38_gateway_state_t m_t38;
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};
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// A channel (terminal) that sends or receives a local TIFF file
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class FaxChan : public Channel
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{
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public:
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FaxChan(bool outgoing, const char *file, bool sender, Message& msg);
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virtual ~FaxChan();
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virtual bool msgAnswered(Message& msg);
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void answer(const char* targetid);
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inline const String& ident() const
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{ return m_ident; }
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inline bool isSender() const
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{ return m_sender; }
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inline bool isCaller() const
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{ return m_caller; }
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private:
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bool startup(FaxWrapper* wrap, const char* type = "audio");
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bool startup(bool digital = false);
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String m_ident;
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bool m_sender;
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bool m_caller;
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bool m_ecm;
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};
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class FaxHandler : public MessageHandler
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{
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public:
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FaxHandler(const char *name) : MessageHandler(name) { }
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virtual bool received(Message &msg);
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};
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// Driver and plugin
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class FaxDriver : public Driver
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{
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public:
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FaxDriver();
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virtual void initialize();
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virtual bool msgExecute(Message& msg, String& dest);
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virtual bool setDebug(Message& msg, const String& target);
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private:
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bool m_first;
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};
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static FaxDriver plugin;
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static bool s_debug = false;
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FaxSource::FaxSource(FaxWrapper* wrapper, const char* format)
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: DataSource(format), m_wrap(wrapper)
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{
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DDebug(m_wrap,DebugAll,"FaxSource::FaxSource(%p,'%s') [%p]",wrapper,format,this);
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if (m_wrap)
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m_wrap->m_source = this;
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}
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FaxSource::~FaxSource()
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{
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DDebug(m_wrap,DebugAll,"FaxSource::~FaxSource() [%p]",this);
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if (m_wrap && (m_wrap->m_source == this)) {
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m_wrap->m_source = 0;
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m_wrap->check();
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}
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m_wrap = 0;
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}
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FaxConsumer::FaxConsumer(FaxWrapper* wrapper, const char* format)
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: DataConsumer(format), m_wrap(wrapper)
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{
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DDebug(m_wrap,DebugAll,"FaxConsumer::FaxConsumer(%p,'%s') [%p]",wrapper,format,this);
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if (m_wrap)
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m_wrap->m_consumer = this;
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}
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FaxConsumer::~FaxConsumer()
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{
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DDebug(m_wrap,DebugAll,"FaxConsumer::~FaxConsumer() [%p]",this);
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if (m_wrap && (m_wrap->m_consumer == this)) {
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m_wrap->m_consumer = 0;
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m_wrap->check();
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}
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m_wrap = 0;
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}
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void FaxConsumer::Consume(const DataBlock& data, unsigned long tStamp)
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{
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if (data.null() || !m_wrap)
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return;
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m_wrap->rxData(data,tStamp);
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}
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static void phase_b_handler(t30_state_t* s, void* user_data, int result)
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{
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if (user_data)
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static_cast<FaxWrapper*>(user_data)->phaseB(result);
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}
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static void phase_d_handler(t30_state_t* s, void* user_data, int result)
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{
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if (user_data)
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static_cast<FaxWrapper*>(user_data)->phaseD(result);
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}
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static void phase_e_handler(t30_state_t* s, void* user_data, int result)
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{
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if (user_data)
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static_cast<FaxWrapper*>(user_data)->phaseE(result);
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}
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FaxWrapper::FaxWrapper()
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: Mutex(true),
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m_t30(0), m_source(0), m_consumer(0), m_chan(0), m_eof(false)
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{
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debugChain(&plugin);
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debugName(plugin.debugName());
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}
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// Set the debugging name, forward it to spandsp
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void FaxWrapper::debugName(const char* name)
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{
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if (name) {
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m_name = name;
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DebugEnabler::debugName(m_name);
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}
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if (m_t30) {
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int level = SPAN_LOG_SHOW_PROTOCOL|SPAN_LOG_SHOW_TAG|SPAN_LOG_SHOW_SEVERITY;
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// this is ugly - but spandsp's logging isn't fine enough
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if (s_debug && debugAt(DebugAll))
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level |= SPAN_LOG_DEBUG;
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else if (s_debug && debugAt(DebugInfo))
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level |= SPAN_LOG_FLOW;
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else if (debugAt(DebugNote))
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level |= SPAN_LOG_PROTOCOL_WARNING;
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else if (debugAt(DebugMild))
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level |= SPAN_LOG_PROTOCOL_ERROR;
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else if (debugAt(DebugWarn))
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level |= SPAN_LOG_WARNING;
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else if (debugAt(DebugGoOn))
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level |= SPAN_LOG_ERROR;
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span_log_set_tag(&m_t30->logging,m_name);
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span_log_set_level(&m_t30->logging,level);
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}
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}
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// Initialize terminal T.30 state
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void FaxWrapper::init(t30_state_t* t30, const char* ident, const char* file, bool sender)
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{
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if (!ident)
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ident = "anonymous";
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t30_set_local_ident(t30,ident);
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t30_set_phase_e_handler(t30,phase_e_handler,this);
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t30_set_phase_d_handler(t30,phase_d_handler,this);
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t30_set_phase_b_handler(t30,phase_b_handler,this);
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m_t30 = t30;
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if (!file)
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return;
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if (sender)
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t30_set_tx_file(t30,file,-1,-1);
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else
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t30_set_rx_file(t30,file,-1);
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}
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// Set the ECM capability in T.30 state
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void FaxWrapper::setECM(bool enable)
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{
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if (!m_t30)
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return;
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t30_set_ecm_capability(m_t30,enable);
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if (enable)
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t30_set_supported_compressions(m_t30,T30_SUPPORT_T4_1D_COMPRESSION |
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T30_SUPPORT_T4_2D_COMPRESSION | T30_SUPPORT_T6_COMPRESSION);
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}
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// Start the terminal's running thread
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bool FaxWrapper::startup(CallEndpoint* chan)
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{
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FaxThread* t = new FaxThread(this);
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if (t->startup()) {
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m_chan = chan;
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return true;
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}
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delete t;
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return false;
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}
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// Disconnect the channel if we can assume it's still there
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void FaxWrapper::cleanup()
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{
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if (m_chan && (m_source || m_consumer))
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m_chan->disconnect();
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}
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// Called on intermediate states
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void FaxWrapper::phaseB(int result)
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{
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Debug(this,DebugInfo,"Phase B code 0x%X: %s [%p]",
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result,t30_frametype(result),this);
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}
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// Called after transferring a page
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void FaxWrapper::phaseD(int result)
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{
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Debug(this,DebugInfo,"Phase D code 0x%X: %s [%p]",
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result,t30_completion_code_to_str(result),this);
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t30_stats_t t;
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char ident[21];
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t30_get_transfer_statistics(t30(), &t);
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Debug(this,DebugAll,"bit rate %d", t.bit_rate);
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Debug(this,DebugAll,"pages transferred %d", t.pages_transferred);
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Debug(this,DebugAll,"image size %d x %d", t.width, t.length);
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Debug(this,DebugAll,"image resolution %d x %d", t.x_resolution, t.y_resolution);
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Debug(this,DebugAll,"bad rows %d", t.bad_rows);
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Debug(this,DebugAll,"longest bad row run %d", t.longest_bad_row_run);
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Debug(this,DebugAll,"compression type %d", t.encoding);
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Debug(this,DebugAll,"image size %d", t.image_size);
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t30_get_local_ident(t30(), ident);
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Debug(this,DebugAll,"local ident '%s'", ident);
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t30_get_far_ident(t30(), ident);
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Debug(this,DebugAll,"remote ident '%s'", ident);
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}
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// Called to report end of transfer
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void FaxWrapper::phaseE(int result)
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{
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Debug(this,DebugInfo,"Phase E code 0x%X: %s [%p]",
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result,t30_completion_code_to_str(result),this);
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m_eof = true;
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}
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// Constructor for the analog fax terminal
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FaxTerminal::FaxTerminal(const char *file, const char *ident, bool sender, bool iscaller)
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: m_lastr(0)
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{
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Debug(this,DebugAll,"FaxTerminal::FaxTerminal(%s %s \"%s\") [%p]",
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(iscaller ? "caller" : "called"),
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(sender ? "transmit" : "receive"),
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file,this);
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fax_init(&m_fax,iscaller);
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init(&m_fax.t30_state,ident,file,sender);
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fax_set_transmit_on_idle(&m_fax,1);
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}
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FaxTerminal::~FaxTerminal()
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{
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Debug(this,DebugAll,"FaxTerminal::~FaxTerminal() [%p]",this);
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fax_release(&m_fax);
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}
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// Run the terminal - send data blocks and sleep accordingly
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void FaxTerminal::run()
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{
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u_int64_t tpos = Time::now();
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while ((m_source || m_consumer) && !m_eof) {
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int r = txBlock();
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if (r < 0)
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break;
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tpos += ((u_int64_t)1000000*r/16000);
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int64_t dly = tpos - Time::now();
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if (dly > 10000)
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dly = 10000;
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if (dly > 0)
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Thread::usleep(dly,true);
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}
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}
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// Build and send encoded audio data blocks
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int FaxTerminal::txBlock()
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{
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Lock lock(this);
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if (m_lastr < 0)
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return m_lastr;
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DataBlock data(0,FAX_DATA_CHUNK);
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int r = 2*fax_tx(&m_fax, (int16_t *) data.data(),data.length()/2);
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if (r != FAX_DATA_CHUNK && r != m_lastr)
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Debug(this,r ? DebugNote : DebugAll,"Generated %d bytes [%p]",r,this);
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m_lastr = r;
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lock.drop();
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if (m_source)
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m_source->Forward(data);
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return data.length();
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}
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// Deliver small chunks of audio data to the decoder
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void FaxTerminal::rxBlock(void *buff, int len)
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{
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Lock lock(this);
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fax_rx(&m_fax, (int16_t *)buff,len/2);
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}
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// Break received audio data into manageable chunks, forward them to decoder
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void FaxTerminal::rxData(const DataBlock& data, unsigned long tStamp)
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{
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unsigned int pos = 0;
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while (pos < data.length())
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{
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// feed the decoder with small chunks of data (16 bytes/ms)
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int len = data.length() - pos;
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if (len > FAX_DATA_CHUNK)
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len = FAX_DATA_CHUNK;
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rxBlock(((char *)data.data())+pos, len);
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pos += len;
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}
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}
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// Constructor for the digital fax terminal
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T38Terminal::T38Terminal(const char *file, const char *ident, bool sender, bool iscaller)
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{
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Debug(this,DebugAll,"T38Terminal::T38Terminal(%s %s \"%s\") [%p]",
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(iscaller ? "caller" : "called"),
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(sender ? "transmit" : "receive"),
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file,this);
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t38_terminal_init(&m_t38,iscaller,txHandler,this);
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t38_set_t38_version(&m_t38.t38,1);
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init(&m_t38.t30_state,ident,file,sender);
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}
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T38Terminal::~T38Terminal()
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{
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Debug(this,DebugAll,"T38Terminal::~T38Terminal() [%p]",this);
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}
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// Run the terminal
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void T38Terminal::run()
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{
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Debug(this,DebugStub,"Please implement T38Terminal::run()");
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t38_terminal_send_timeout(&m_t38,T38_DATA_CHUNK);
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}
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// Static callback that sends out T.38 data
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int T38Terminal::txHandler(t38_core_state_t* t38s, void* userData,
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const uint8_t* buf, int len, int count)
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{
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if (!(t38s && userData))
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return 1;
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return static_cast<T38Terminal*>(userData)->txData(buf,len,t38s->tx_seq_no,count);
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}
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// Handle received digital data
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void T38Terminal::rxData(const DataBlock& data, unsigned long tStamp)
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{
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Debug(this,DebugStub,"Please implement T38Terminal::rxData()");
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t38_core_rx_ifp_packet(&m_t38.t38,tStamp,(uint8_t*)data.data(),data.length());
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}
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|
|
|
int T38Terminal::txData(const void* buf, int len, int seq, int count)
|
|
{
|
|
Debug(this,DebugStub,"Please implement T38Terminal::txData()");
|
|
}
|
|
|
|
|
|
// Helper thread
|
|
void FaxThread::run()
|
|
{
|
|
m_wrap->run();
|
|
m_wrap->cleanup();
|
|
}
|
|
|
|
|
|
// Constructor for a generic fax terminal channel
|
|
FaxChan::FaxChan(bool outgoing, const char *file, bool sender, Message& msg)
|
|
: Channel(plugin,0,outgoing), m_sender(sender)
|
|
{
|
|
Debug(this,DebugAll,"FaxChan::FaxChan(%s \"%s\") [%p]",
|
|
(sender ? "transmit" : "receive"),
|
|
file,this);
|
|
const char* ident = msg.getValue("faxident",msg.getValue("caller"));
|
|
if (!ident)
|
|
ident = "anonymous";
|
|
m_ident = ident;
|
|
// outgoing means from Yate to file so the fax should answer by default
|
|
m_caller = msg.getBoolValue("faxcaller",!outgoing);
|
|
m_ecm = msg.getBoolValue("faxecm");
|
|
m_address = file;
|
|
Engine::enqueue(message("chan.startup"));
|
|
}
|
|
|
|
// Destructor - clears all (audio, image) endpoints early
|
|
FaxChan::~FaxChan()
|
|
{
|
|
Debug(DebugAll,"FaxChan::~FaxChan() [%p]",this);
|
|
clearEndpoint();
|
|
Engine::enqueue(message("chan.hangup"));
|
|
}
|
|
|
|
// Build data channels, attaches a wrapper and starts it up
|
|
bool FaxChan::startup(FaxWrapper* wrap, const char* type)
|
|
{
|
|
wrap->debugName(debugName());
|
|
FaxSource* fs = new FaxSource(wrap);
|
|
setSource(fs,type);
|
|
fs->deref();
|
|
FaxConsumer* fc = new FaxConsumer(wrap);
|
|
setConsumer(fc,type);
|
|
fc->deref();
|
|
wrap->setECM(m_ecm);
|
|
bool ok = wrap->startup(this);
|
|
wrap->deref();
|
|
return ok;
|
|
}
|
|
|
|
// Attach and start an analog or digital wrapper
|
|
bool FaxChan::startup(bool digital)
|
|
{
|
|
if (digital)
|
|
return startup(new T38Terminal(address(),m_ident,m_sender,m_caller),"image");
|
|
else
|
|
return startup(new FaxTerminal(address(),m_ident,m_sender,m_caller));
|
|
}
|
|
|
|
// Handler for an originator fax start request
|
|
bool FaxChan::msgAnswered(Message& msg)
|
|
{
|
|
if (Channel::msgAnswered(msg)) {
|
|
startup();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Handler for an answerer fax start request
|
|
void FaxChan::answer(const char* targetid)
|
|
{
|
|
if (targetid)
|
|
m_targetid = targetid;
|
|
status("answered");
|
|
startup();
|
|
Engine::enqueue(message("call.answered"));
|
|
}
|
|
|
|
|
|
bool FaxDriver::msgExecute(Message& msg, String& dest)
|
|
{
|
|
Regexp r("^\\([^/]*\\)/\\(.*\\)$");
|
|
if (!dest.matches(r))
|
|
return false;
|
|
|
|
bool transmit = false;
|
|
if ((dest.matchString(1) == "send") || (dest.matchString(1) == "transmit"))
|
|
transmit = true;
|
|
else if (dest.matchString(1) != "receive") {
|
|
Debug(this,DebugWarn,"Invalid fax method '%s', use 'receive' or 'transmit'",
|
|
dest.matchString(1).c_str());
|
|
return false;
|
|
}
|
|
dest = dest.matchString(2);
|
|
|
|
RefPointer<FaxChan> fc;
|
|
CallEndpoint* ce = static_cast<CallEndpoint *>(msg.userData());
|
|
if (ce) {
|
|
fc = new FaxChan(true,dest,transmit,msg);
|
|
fc->deref();
|
|
if (fc->connect(ce)) {
|
|
msg.setParam("peerid",fc->id());
|
|
msg.setParam("targetid",fc->id());
|
|
fc->answer(msg.getValue("id",ce->id()));
|
|
return true;
|
|
}
|
|
}
|
|
else {
|
|
fc = new FaxChan(false,dest,transmit,msg);
|
|
fc->deref();
|
|
Message m("call.route");
|
|
fc->complete(m);
|
|
m.userData(fc);
|
|
String callto = msg.getValue("caller");
|
|
if (callto)
|
|
m.addParam("caller",callto);
|
|
callto = msg.getValue("direct");
|
|
if (callto.null()) {
|
|
const char* targ = msg.getValue("target");
|
|
if (!targ) {
|
|
Debug(DebugWarn,"Outgoing fax call with no target!");
|
|
return false;
|
|
}
|
|
m.addParam("called",targ);
|
|
if (!Engine::dispatch(m) || m.retValue().null()) {
|
|
Debug(this,DebugWarn,"Outgoing fax call but no route!");
|
|
return false;
|
|
}
|
|
callto = m.retValue();
|
|
}
|
|
m = "call.execute";
|
|
m.addParam("callto",callto);
|
|
m.retValue().clear();
|
|
if (Engine::dispatch(m)) {
|
|
fc->callAccept(m);
|
|
return true;
|
|
}
|
|
Debug(this,DebugWarn,"Outgoing fax call not accepted!");
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool FaxDriver::setDebug(Message& msg, const String& target)
|
|
{
|
|
if (target == "spandsp") {
|
|
s_debug = msg.getBoolValue("line",s_debug);
|
|
msg.retValue() << "Detailed spandsp debugging " << (s_debug ? "on" : "off") << "\r\n";
|
|
return true;
|
|
}
|
|
return Driver::setDebug(msg,target);
|
|
}
|
|
|
|
FaxDriver::FaxDriver()
|
|
: Driver("fax"), m_first(true)
|
|
{
|
|
Output("Loaded module Fax");
|
|
}
|
|
|
|
void FaxDriver::initialize()
|
|
{
|
|
Output("Initializing module Fax");
|
|
setup();
|
|
if (m_first) {
|
|
m_first = false;
|
|
// TODO: add other handlers
|
|
}
|
|
}
|
|
|
|
}; // anonymous namespace
|
|
|
|
/* vi: set ts=8 sw=4 sts=4 noet: */
|