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git.gir.st - tmk_keyboard.git/blob - tmk_core/tool/mbed/mbed-sdk/libraries/net/cellular/CellularModem/ussd/USSDInterface.cpp
1 /* USSDInterface.cpp */
2 /* Copyright (C) 2012 mbed.org, MIT License
4 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
5 * and associated documentation files (the "Software"), to deal in the Software without restriction,
6 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
7 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
10 * The above copyright notice and this permission notice shall be included in all copies or
11 * substantial portions of the Software.
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
14 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
15 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
17 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 #define __MODULE__ "USSDInterface.cpp"
27 #include "USSDInterface.h"
31 #define DEFAULT_TIMEOUT 10000
32 #define USSD_TIMEOUT 15000
34 USSDInterface::USSDInterface(ATCommandsInterface
* pIf
) : m_pIf(pIf
), m_responseMtx(), m_responseSphre(1), m_result(NULL
), m_maxResultLength(0)
36 m_responseSphre
.wait(0); //Take ownership of the semaphore
37 m_pIf
->registerEventsHandler(this); //Add us to the unsolicited result codes handlers
40 int USSDInterface::init()
42 DBG("Initialization done");
46 int USSDInterface::send(const char* command
, char* result
, size_t maxLength
)
48 if (strlen(command
) > 20) //Prevent buffer overflow
55 m_maxResultLength
= maxLength
;
56 m_responseMtx
.unlock();
58 m_responseSphre
.wait(0); //Make sure there is not a pending result that needs to be discarded
60 DBG("Send USSD command & register for unsolicited result codes");
61 //Send USSD command to the network
63 std::sprintf(cmd
, "AT+CUSD=1,\"%s\"", command
);
64 int ret
= m_pIf
->execute(cmd
, this, NULL
, DEFAULT_TIMEOUT
);
70 //Did we already get a response (3GPP rev < 6) ?
72 //Now wait for response
73 int res
= m_responseSphre
.wait(USSD_TIMEOUT
);
78 m_maxResultLength
= 0;
79 m_responseMtx
.unlock();
83 DBG("No result received");
84 ret
= m_pIf
->executeSimple("AT+CUSD=2", NULL
, DEFAULT_TIMEOUT
); //Cancel command
92 DBG("Result received: %s", result
);
97 /*virtual*/ int USSDInterface::onNewATResponseLine(ATCommandsInterface
* pInst
, const char* line
)
99 const char* pSemicol
= strchr(line
, ':');
100 if( ( (pSemicol
- line
) != strlen("+CUSD") ) || ( memcmp(line
, "+CUSD", strlen("+CUSD")) != 0) )
102 WARN("Unknown code");
106 const char* pData
= NULL
;
107 if( pSemicol
!= NULL
) //Split the identifier & the result code (if it exists)
109 pData
= pSemicol
+ 1;
112 pData
++; //Suppress whitespace
114 processResult(pData
);
119 /*virtual*/ int USSDInterface::onNewEntryPrompt(ATCommandsInterface
* pInst
)
124 /*virtual*/ bool USSDInterface::isATCodeHandled(const char* atCode
) //Is this AT code handled
126 DBG("AT code is %s", atCode
);
127 if( strcmp("+CUSD", atCode
) == 0 )
136 /*virtual*/ void USSDInterface::onDispatchStart()
142 /*virtual*/ void USSDInterface::onDispatchStop()
147 /*virtual*/ char* USSDInterface::getEventsEnableCommand()
149 return NULL
; //No need to disable events here
152 /*virtual*/ char* USSDInterface::getEventsDisableCommand()
154 return NULL
; //No need to re-enable events here
157 /*virtual*/ void USSDInterface::onEvent(const char* atCode
, const char* evt
)
159 if( strcmp("+CUSD", atCode
) != 0 )
161 WARN("Wrong AT Code");
162 return; //Not supported
168 void USSDInterface::processResult(const char* data
)
170 char* pStart
= (char*) strchr(data
,'\"');
173 WARN("Could not find opening quote");
174 return; //Invalid/incomplete response
176 pStart
++; //Point to first char of response
177 char* pEnd
= (char*) strchr(pStart
,'\"');
180 WARN("Could not find closing quote");
181 return; //Invalid/incomplete response
183 m_responseMtx
.lock();
184 if(m_maxResultLength
== 0) //No pending command
186 WARN("No pending command");
187 m_responseMtx
.unlock();
190 size_t cpyLen
= MIN( pEnd
- pStart
, m_maxResultLength
- 1 );
191 memcpy((void*)m_result
, pStart
, cpyLen
);
192 m_result
[cpyLen
] = '\0';
193 DBG("Got USSD response: %s", m_result
);
194 m_responseMtx
.unlock();
195 m_responseSphre
.release(); //Signal user thread that response is ready