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h323t38.h

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00001 /* 00002 * h323t38.h 00003 * 00004 * H.323 T.38 logical channel establishment 00005 * 00006 * Open H323 Library 00007 * 00008 * Copyright (c) 2001 Equivalence Pty. Ltd. 00009 * 00010 * The contents of this file are subject to the Mozilla Public License 00011 * Version 1.0 (the "License"); you may not use this file except in 00012 * compliance with the License. You may obtain a copy of the License at 00013 * http://www.mozilla.org/MPL/ 00014 * 00015 * Software distributed under the License is distributed on an "AS IS" 00016 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See 00017 * the License for the specific language governing rights and limitations 00018 * under the License. 00019 * 00020 * The Original Code is Open H323 Library. 00021 * 00022 * The Initial Developer of the Original Code is Equivalence Pty. Ltd. 00023 * 00024 * Contributor(s): ______________________________________. 00025 * 00026 * $Log: h323t38.h,v $ 00027 * Revision 1.14 2002/09/16 01:14:15 robertj 00028 * Added #define so can select if #pragma interface/implementation is used on 00029 * platform basis (eg MacOS) rather than compiler, thanks Robert Monaghan. 00030 * 00031 * Revision 1.13 2002/09/03 06:19:37 robertj 00032 * Normalised the multi-include header prevention ifdef/define symbol. 00033 * 00034 * Revision 1.12 2002/08/05 10:03:47 robertj 00035 * Cosmetic changes to normalise the usage of pragma interface/implementation. 00036 * 00037 * Revision 1.11 2002/05/15 23:30:01 robertj 00038 * Backed out delete of t38 handler, causes race conditions. 00039 * 00040 * Revision 1.10 2002/05/15 01:30:49 robertj 00041 * Added missing delete of t38 handler, thanks thsuk@digitalsis.com. 00042 * Changed to allow the T.35 information to be adjusted so it will work for 00043 * various vendors version of the non-standard capability. 00044 * 00045 * Revision 1.9 2002/05/10 05:49:22 robertj 00046 * Added the max bit rate field to the data channel capability class. 00047 * Added session ID to the data logical channel class. 00048 * Added capability for old pre-v3 non-standard T.38. 00049 * 00050 * Revision 1.8 2002/01/09 00:21:36 robertj 00051 * Changes to support outgoing H.245 RequstModeChange. 00052 * 00053 * Revision 1.7 2002/01/01 23:27:50 craigs 00054 * Added CleanupOnTermination functions 00055 * Thanks to Vyacheslav Frolov 00056 * 00057 * Revision 1.6 2001/12/22 01:55:20 robertj 00058 * Removed vast quatities of redundent code that is done by ancestor class. 00059 * 00060 * Revision 1.5 2001/12/14 08:36:36 robertj 00061 * More implementation of T.38, thanks Adam Lazur 00062 * 00063 * Revision 1.4 2001/11/20 03:04:30 robertj 00064 * Added ability to reuse t38 channels with same session ID. 00065 * 00066 * Revision 1.3 2001/11/09 05:39:54 craigs 00067 * Added initial T.38 support thanks to Adam Lazur 00068 * 00069 * Revision 1.2 2001/07/24 02:25:57 robertj 00070 * Added UDP, dual TCP and single TCP modes to T.38 capability. 00071 * 00072 * Revision 1.1 2001/07/17 04:44:29 robertj 00073 * Partial implementation of T.120 and T.38 logical channels. 00074 * 00075 */ 00076 00077 #ifndef __OPAL_H323T38_H 00078 #define __OPAL_H323T38_H 00079 00080 #ifdef P_USE_PRAGMA 00081 #pragma interface 00082 #endif 00083 00084 00085 #include "h323caps.h" 00086 00087 00088 class H245_T38FaxProfile; 00089 00090 class OpalT38Protocol; 00091 00092 00094 00097 class H323_T38Capability : public H323DataCapability 00098 { 00099 PCLASSINFO(H323_T38Capability, H323DataCapability); 00100 public: 00103 enum TransportMode { 00104 e_UDP, 00105 e_DualTCP, 00106 e_SingleTCP, 00107 NumTransportModes 00108 }; 00109 00112 H323_T38Capability( 00113 TransportMode mode 00114 ); 00116 00122 Comparison Compare(const PObject & obj) const; 00123 00126 virtual PObject * Clone() const; 00128 00137 virtual unsigned GetSubType() const; 00138 00141 virtual PString GetFormatName() const; 00143 00148 virtual H323Channel * CreateChannel( 00149 H323Connection & connection, 00150 H323Channel::Directions dir, 00151 unsigned sessionID, 00152 const H245_H2250LogicalChannelParameters * param 00154 ) const; 00156 00167 virtual BOOL OnSendingPDU( 00168 H245_DataApplicationCapability & pdu 00169 ) const; 00170 00179 virtual BOOL OnSendingPDU( 00180 H245_DataMode & pdu 00181 ) const; 00182 00189 virtual BOOL OnSendingPDU( 00190 H245_DataProtocolCapability & proto, 00191 H245_T38FaxProfile & profile 00192 ) const; 00193 00201 virtual BOOL OnReceivedPDU( 00202 const H245_DataApplicationCapability & pdu 00203 ); 00205 00206 TransportMode GetTransportMode() const { return mode; } 00207 00208 protected: 00209 TransportMode mode; 00210 }; 00211 00212 00215 class H323_T38NonStandardCapability : public H323NonStandardDataCapability 00216 { 00217 PCLASSINFO(H323_T38NonStandardCapability, H323NonStandardDataCapability); 00218 public: 00223 H323_T38NonStandardCapability( 00224 BYTE country = 181, 00225 BYTE extension = 0, 00226 WORD maufacturer = 18 00227 ); 00229 00234 virtual PObject * Clone() const; 00236 00241 virtual PString GetFormatName() const; 00243 00248 virtual H323Channel * CreateChannel( 00249 H323Connection & connection, 00250 H323Channel::Directions dir, 00251 unsigned sessionID, 00252 const H245_H2250LogicalChannelParameters * param 00254 ) const; 00256 }; 00257 00258 00261 class H323_T38Channel : public H323DataChannel 00262 { 00263 PCLASSINFO(H323_T38Channel, H323DataChannel); 00264 public: 00269 H323_T38Channel( 00270 H323Connection & connection, 00271 const H323Capability & capability, 00272 Directions direction, 00273 unsigned sessionID, 00274 H323_T38Capability::TransportMode mode 00275 ); 00276 ~H323_T38Channel(); 00278 00283 virtual BOOL OnSendingPDU( 00284 H245_OpenLogicalChannel & openPDU 00285 ) const; 00286 00294 virtual BOOL OnReceivedPDU( 00295 const H245_OpenLogicalChannel & pdu, 00296 unsigned & errorCode 00297 ); 00298 00301 virtual void CleanUpOnTermination(); 00302 00309 virtual void Receive(); 00310 00317 virtual void Transmit(); 00318 00325 virtual BOOL CreateListener(); 00326 00334 virtual BOOL CreateTransport(); 00336 00337 OpalT38Protocol * GetHandler() const { return t38handler; } 00338 00339 protected: 00340 BOOL usesTCP; 00341 OpalT38Protocol * t38handler; 00342 }; 00343 00344 00345 #endif // __OPAL_H323T38_H 00346 00347

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