mbed official / CellularModem

Base library for cellular modem implementations

Dependencies:   Socket lwip-sys lwip

Dependents:   CellularUSBModem CellularUSBModem

Deprecated

This is an mbed 2 networking library. For mbed 5, the networking libraries have been revised to better support additional network stacks and thread safety here.

ussd/USSDInterface.cpp@8:944cd194963e, 2014-05-08 (annotated)

Committer:
mbed_official
Date:
Thu May 08 11:00:26 2014 +0100
Revision:
8:944cd194963e
Parent:
1:4a23efdf0da9 
Synchronized with git revision df12bf01ac7dbb50751e2b16a351c894994e1dcf



Full URL: https://github.com/mbedmicro/mbed/commit/df12bf01ac7dbb50751e2b16a351c894994e1dcf/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 1:4a23efdf0da9 1 /* USSDInterface.cpp */
bogdanm 1:4a23efdf0da9 2 /* Copyright (C) 2012 mbed.org, MIT License
bogdanm 1:4a23efdf0da9 3 *
bogdanm 1:4a23efdf0da9 4 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
bogdanm 1:4a23efdf0da9 5 * and associated documentation files (the "Software"), to deal in the Software without restriction,
bogdanm 1:4a23efdf0da9 6 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
bogdanm 1:4a23efdf0da9 7 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
bogdanm 1:4a23efdf0da9 8 * furnished to do so, subject to the following conditions:
bogdanm 1:4a23efdf0da9 9 *
bogdanm 1:4a23efdf0da9 10 * The above copyright notice and this permission notice shall be included in all copies or
bogdanm 1:4a23efdf0da9 11 * substantial portions of the Software.
bogdanm 1:4a23efdf0da9 12 *
bogdanm 1:4a23efdf0da9 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
bogdanm 1:4a23efdf0da9 14 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
bogdanm 1:4a23efdf0da9 15 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
bogdanm 1:4a23efdf0da9 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
bogdanm 1:4a23efdf0da9 17 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
bogdanm 1:4a23efdf0da9 18 */
bogdanm 1:4a23efdf0da9 19
bogdanm 1:4a23efdf0da9 20 #define __DEBUG__ 0
bogdanm 1:4a23efdf0da9 21 #ifndef __MODULE__
bogdanm 1:4a23efdf0da9 22 #define __MODULE__ "USSDInterface.cpp"
bogdanm 1:4a23efdf0da9 23 #endif
bogdanm 1:4a23efdf0da9 24
bogdanm 1:4a23efdf0da9 25 #include "core/fwk.h"
bogdanm 1:4a23efdf0da9 26
bogdanm 1:4a23efdf0da9 27 #include "USSDInterface.h"
bogdanm 1:4a23efdf0da9 28
bogdanm 1:4a23efdf0da9 29 #include <cstdio>
bogdanm 1:4a23efdf0da9 30
bogdanm 1:4a23efdf0da9 31 #define DEFAULT_TIMEOUT 10000
bogdanm 1:4a23efdf0da9 32 #define USSD_TIMEOUT 15000
bogdanm 1:4a23efdf0da9 33
bogdanm 1:4a23efdf0da9 34 USSDInterface::USSDInterface(ATCommandsInterface* pIf) : m_pIf(pIf), m_responseMtx(), m_responseSphre(1), m_result(NULL), m_maxResultLength(0)
bogdanm 1:4a23efdf0da9 35 {
bogdanm 1:4a23efdf0da9 36 m_responseSphre.wait(0); //Take ownership of the semaphore
bogdanm 1:4a23efdf0da9 37 m_pIf->registerEventsHandler(this); //Add us to the unsolicited result codes handlers
bogdanm 1:4a23efdf0da9 38 }
bogdanm 1:4a23efdf0da9 39
bogdanm 1:4a23efdf0da9 40 int USSDInterface::init()
bogdanm 1:4a23efdf0da9 41 {
bogdanm 1:4a23efdf0da9 42 DBG("Initialization done");
bogdanm 1:4a23efdf0da9 43 return OK;
bogdanm 1:4a23efdf0da9 44 }
bogdanm 1:4a23efdf0da9 45
bogdanm 1:4a23efdf0da9 46 int USSDInterface::send(const char* command, char* result, size_t maxLength)
bogdanm 1:4a23efdf0da9 47 {
bogdanm 1:4a23efdf0da9 48 if (strlen(command) > 20) //Prevent buffer overflow
bogdanm 1:4a23efdf0da9 49 {
bogdanm 1:4a23efdf0da9 50 return NET_TOOSMALL;
bogdanm 1:4a23efdf0da9 51 }
bogdanm 1:4a23efdf0da9 52
bogdanm 1:4a23efdf0da9 53 m_responseMtx.lock();
bogdanm 1:4a23efdf0da9 54 m_result = result;
bogdanm 1:4a23efdf0da9 55 m_maxResultLength = maxLength;
bogdanm 1:4a23efdf0da9 56 m_responseMtx.unlock();
bogdanm 1:4a23efdf0da9 57
bogdanm 1:4a23efdf0da9 58 m_responseSphre.wait(0); //Make sure there is not a pending result that needs to be discarded
bogdanm 1:4a23efdf0da9 59
bogdanm 1:4a23efdf0da9 60 DBG("Send USSD command & register for unsolicited result codes");
bogdanm 1:4a23efdf0da9 61 //Send USSD command to the network
bogdanm 1:4a23efdf0da9 62 char cmd[32];
bogdanm 1:4a23efdf0da9 63 std::sprintf(cmd, "AT+CUSD=1,\"%s\"", command);
bogdanm 1:4a23efdf0da9 64 int ret = m_pIf->execute(cmd, this, NULL, DEFAULT_TIMEOUT);
bogdanm 1:4a23efdf0da9 65 if( ret != OK )
bogdanm 1:4a23efdf0da9 66 {
bogdanm 1:4a23efdf0da9 67 return NET_PROTOCOL;
bogdanm 1:4a23efdf0da9 68 }
bogdanm 1:4a23efdf0da9 69
bogdanm 1:4a23efdf0da9 70 //Did we already get a response (3GPP rev < 6) ?
bogdanm 1:4a23efdf0da9 71
bogdanm 1:4a23efdf0da9 72 //Now wait for response
bogdanm 1:4a23efdf0da9 73 int res = m_responseSphre.wait(USSD_TIMEOUT);
bogdanm 1:4a23efdf0da9 74
bogdanm 1:4a23efdf0da9 75 //Reset data
bogdanm 1:4a23efdf0da9 76 m_responseMtx.lock();
bogdanm 1:4a23efdf0da9 77 m_result = NULL;
bogdanm 1:4a23efdf0da9 78 m_maxResultLength = 0;
bogdanm 1:4a23efdf0da9 79 m_responseMtx.unlock();
bogdanm 1:4a23efdf0da9 80
bogdanm 1:4a23efdf0da9 81 if(res <= 0)
bogdanm 1:4a23efdf0da9 82 {
bogdanm 1:4a23efdf0da9 83 DBG("No result received");
bogdanm 1:4a23efdf0da9 84 ret = m_pIf->executeSimple("AT+CUSD=2", NULL, DEFAULT_TIMEOUT); //Cancel command
bogdanm 1:4a23efdf0da9 85 if( ret != OK )
bogdanm 1:4a23efdf0da9 86 {
bogdanm 1:4a23efdf0da9 87 return NET_PROTOCOL;
bogdanm 1:4a23efdf0da9 88 }
bogdanm 1:4a23efdf0da9 89 return NET_TIMEOUT;
bogdanm 1:4a23efdf0da9 90 }
bogdanm 1:4a23efdf0da9 91
bogdanm 1:4a23efdf0da9 92 DBG("Result received: %s", result);
bogdanm 1:4a23efdf0da9 93
bogdanm 1:4a23efdf0da9 94 return OK;
bogdanm 1:4a23efdf0da9 95 }
bogdanm 1:4a23efdf0da9 96
bogdanm 1:4a23efdf0da9 97 /*virtual*/ int USSDInterface::onNewATResponseLine(ATCommandsInterface* pInst, const char* line)
bogdanm 1:4a23efdf0da9 98 {
bogdanm 1:4a23efdf0da9 99 const char* pSemicol = strchr(line, ':');
bogdanm 1:4a23efdf0da9 100 if( ( (pSemicol - line) != strlen("+CUSD") ) || ( memcmp(line, "+CUSD", strlen("+CUSD")) != 0) )
bogdanm 1:4a23efdf0da9 101 {
bogdanm 1:4a23efdf0da9 102 WARN("Unknown code");
bogdanm 1:4a23efdf0da9 103 return OK;
bogdanm 1:4a23efdf0da9 104 }
bogdanm 1:4a23efdf0da9 105
bogdanm 1:4a23efdf0da9 106 const char* pData = NULL;
bogdanm 1:4a23efdf0da9 107 if( pSemicol != NULL ) //Split the identifier & the result code (if it exists)
bogdanm 1:4a23efdf0da9 108 {
bogdanm 1:4a23efdf0da9 109 pData = pSemicol + 1;
bogdanm 1:4a23efdf0da9 110 if(pData[0]==' ')
bogdanm 1:4a23efdf0da9 111 {
bogdanm 1:4a23efdf0da9 112 pData++; //Suppress whitespace
bogdanm 1:4a23efdf0da9 113 }
bogdanm 1:4a23efdf0da9 114 processResult(pData);
bogdanm 1:4a23efdf0da9 115 }
bogdanm 1:4a23efdf0da9 116 return OK;
bogdanm 1:4a23efdf0da9 117 }
bogdanm 1:4a23efdf0da9 118
bogdanm 1:4a23efdf0da9 119 /*virtual*/ int USSDInterface::onNewEntryPrompt(ATCommandsInterface* pInst)
bogdanm 1:4a23efdf0da9 120 {
bogdanm 1:4a23efdf0da9 121 return OK;
bogdanm 1:4a23efdf0da9 122 }
bogdanm 1:4a23efdf0da9 123
bogdanm 1:4a23efdf0da9 124 /*virtual*/ bool USSDInterface::isATCodeHandled(const char* atCode) //Is this AT code handled
bogdanm 1:4a23efdf0da9 125 {
bogdanm 1:4a23efdf0da9 126 DBG("AT code is %s", atCode);
bogdanm 1:4a23efdf0da9 127 if( strcmp("+CUSD", atCode) == 0 )
bogdanm 1:4a23efdf0da9 128 {
bogdanm 1:4a23efdf0da9 129 return true;
bogdanm 1:4a23efdf0da9 130 }
bogdanm 1:4a23efdf0da9 131
bogdanm 1:4a23efdf0da9 132 DBG("Not handled");
bogdanm 1:4a23efdf0da9 133 return false;
bogdanm 1:4a23efdf0da9 134 }
bogdanm 1:4a23efdf0da9 135
bogdanm 1:4a23efdf0da9 136 /*virtual*/ void USSDInterface::onDispatchStart()
bogdanm 1:4a23efdf0da9 137 {
bogdanm 1:4a23efdf0da9 138
bogdanm 1:4a23efdf0da9 139
bogdanm 1:4a23efdf0da9 140 }
bogdanm 1:4a23efdf0da9 141
bogdanm 1:4a23efdf0da9 142 /*virtual*/ void USSDInterface::onDispatchStop()
bogdanm 1:4a23efdf0da9 143 {
bogdanm 1:4a23efdf0da9 144
bogdanm 1:4a23efdf0da9 145 }
bogdanm 1:4a23efdf0da9 146
bogdanm 1:4a23efdf0da9 147 /*virtual*/ char* USSDInterface::getEventsEnableCommand()
bogdanm 1:4a23efdf0da9 148 {
bogdanm 1:4a23efdf0da9 149 return NULL; //No need to disable events here
bogdanm 1:4a23efdf0da9 150 }
bogdanm 1:4a23efdf0da9 151
bogdanm 1:4a23efdf0da9 152 /*virtual*/ char* USSDInterface::getEventsDisableCommand()
bogdanm 1:4a23efdf0da9 153 {
bogdanm 1:4a23efdf0da9 154 return NULL; //No need to re-enable events here
bogdanm 1:4a23efdf0da9 155 }
bogdanm 1:4a23efdf0da9 156
bogdanm 1:4a23efdf0da9 157 /*virtual*/ void USSDInterface::onEvent(const char* atCode, const char* evt)
bogdanm 1:4a23efdf0da9 158 {
bogdanm 1:4a23efdf0da9 159 if( strcmp("+CUSD", atCode) != 0 )
bogdanm 1:4a23efdf0da9 160 {
bogdanm 1:4a23efdf0da9 161 WARN("Wrong AT Code");
bogdanm 1:4a23efdf0da9 162 return; //Not supported
bogdanm 1:4a23efdf0da9 163 }
bogdanm 1:4a23efdf0da9 164
bogdanm 1:4a23efdf0da9 165 processResult(evt);
bogdanm 1:4a23efdf0da9 166 }
bogdanm 1:4a23efdf0da9 167
bogdanm 1:4a23efdf0da9 168 void USSDInterface::processResult(const char* data)
bogdanm 1:4a23efdf0da9 169 {
bogdanm 1:4a23efdf0da9 170 char* pStart = (char*) strchr(data,'\"');
bogdanm 1:4a23efdf0da9 171 if(pStart==NULL)
bogdanm 1:4a23efdf0da9 172 {
bogdanm 1:4a23efdf0da9 173 WARN("Could not find opening quote");
bogdanm 1:4a23efdf0da9 174 return; //Invalid/incomplete response
bogdanm 1:4a23efdf0da9 175 }
bogdanm 1:4a23efdf0da9 176 pStart++; //Point to first char of response
bogdanm 1:4a23efdf0da9 177 char* pEnd = (char*) strchr(pStart,'\"');
bogdanm 1:4a23efdf0da9 178 if(pEnd==NULL)
bogdanm 1:4a23efdf0da9 179 {
bogdanm 1:4a23efdf0da9 180 WARN("Could not find closing quote");
bogdanm 1:4a23efdf0da9 181 return; //Invalid/incomplete response
bogdanm 1:4a23efdf0da9 182 }
bogdanm 1:4a23efdf0da9 183 m_responseMtx.lock();
bogdanm 1:4a23efdf0da9 184 if(m_maxResultLength == 0) //No pending command
bogdanm 1:4a23efdf0da9 185 {
bogdanm 1:4a23efdf0da9 186 WARN("No pending command");
bogdanm 1:4a23efdf0da9 187 m_responseMtx.unlock();
bogdanm 1:4a23efdf0da9 188 return;
bogdanm 1:4a23efdf0da9 189 }
bogdanm 1:4a23efdf0da9 190 size_t cpyLen = MIN( pEnd - pStart, m_maxResultLength - 1 );
bogdanm 1:4a23efdf0da9 191 memcpy((void*)m_result, pStart, cpyLen);
bogdanm 1:4a23efdf0da9 192 m_result[cpyLen] = '\0';
bogdanm 1:4a23efdf0da9 193 DBG("Got USSD response: %s", m_result);
bogdanm 1:4a23efdf0da9 194 m_responseMtx.unlock();
bogdanm 1:4a23efdf0da9 195 m_responseSphre.release(); //Signal user thread that response is ready
bogdanm 1:4a23efdf0da9 196 }