Alex Kiernan / VodafoneUSBModem

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ussd/USSDInterface.cpp@8:04b6a042595f, 2012-06-26 (annotated)

Committer:
donatien
Date:
Tue Jun 26 13:44:59 2012 +0000
Revision:
8:04b6a042595f
Parent:
main/if/ussd/USSDInterface.cpp@0:3b2f052c333b
Child:
12:66dc2c8eba2d
Bleeding edge - test with two different interfaces

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:3b2f052c333b 1 /* USSDInterface.cpp */
donatien 0:3b2f052c333b 2 /*
donatien 0:3b2f052c333b 3 Copyright (C) 2012 ARM Limited.
donatien 0:3b2f052c333b 4
donatien 0:3b2f052c333b 5 Permission is hereby granted, free of charge, to any person obtaining a copy of
donatien 0:3b2f052c333b 6 this software and associated documentation files (the "Software"), to deal in
donatien 0:3b2f052c333b 7 the Software without restriction, including without limitation the rights to
donatien 0:3b2f052c333b 8 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
donatien 0:3b2f052c333b 9 of the Software, and to permit persons to whom the Software is furnished to do
donatien 0:3b2f052c333b 10 so, subject to the following conditions:
donatien 0:3b2f052c333b 11
donatien 0:3b2f052c333b 12 The above copyright notice and this permission notice shall be included in all
donatien 0:3b2f052c333b 13 copies or substantial portions of the Software.
donatien 0:3b2f052c333b 14
donatien 0:3b2f052c333b 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
donatien 0:3b2f052c333b 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
donatien 0:3b2f052c333b 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
donatien 0:3b2f052c333b 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
donatien 0:3b2f052c333b 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
donatien 0:3b2f052c333b 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
donatien 0:3b2f052c333b 21 SOFTWARE.
donatien 0:3b2f052c333b 22 */
donatien 0:3b2f052c333b 23
donatien 0:3b2f052c333b 24 #define __DEBUG__ 4
donatien 0:3b2f052c333b 25 #ifndef __MODULE__
donatien 0:3b2f052c333b 26 #define __MODULE__ "USSDInterface.cpp"
donatien 0:3b2f052c333b 27 #endif
donatien 0:3b2f052c333b 28
donatien 0:3b2f052c333b 29 #include "core/fwk.h"
donatien 0:3b2f052c333b 30
donatien 0:3b2f052c333b 31 #include "USSDInterface.h"
donatien 0:3b2f052c333b 32
donatien 0:3b2f052c333b 33 #include <cstdio>
donatien 0:3b2f052c333b 34
donatien 0:3b2f052c333b 35 #define DEFAULT_TIMEOUT 10000
donatien 0:3b2f052c333b 36 #define USSD_TIMEOUT 15000
donatien 0:3b2f052c333b 37
donatien 0:3b2f052c333b 38 USSDInterface::USSDInterface(ATCommandsInterface* pIf) : m_pIf(pIf), m_responseMtx(), m_responseSphre(1), m_result(NULL), m_maxResultLength(0)
donatien 0:3b2f052c333b 39 {
donatien 0:3b2f052c333b 40 m_responseSphre.wait(0); //Take ownership of the semaphore
donatien 0:3b2f052c333b 41 m_pIf->registerEventsHandler(this); //Add us to the unsolicited result codes handlers
donatien 0:3b2f052c333b 42 }
donatien 0:3b2f052c333b 43
donatien 0:3b2f052c333b 44 int USSDInterface::init()
donatien 0:3b2f052c333b 45 {
donatien 0:3b2f052c333b 46 DBG("Initialization done");
donatien 0:3b2f052c333b 47 return OK;
donatien 0:3b2f052c333b 48 }
donatien 0:3b2f052c333b 49
donatien 0:3b2f052c333b 50 int USSDInterface::send(const char* command, char* result, size_t maxLength)
donatien 0:3b2f052c333b 51 {
donatien 0:3b2f052c333b 52 if (strlen(command) > 20) //Prevent buffer overflow
donatien 0:3b2f052c333b 53 {
donatien 0:3b2f052c333b 54 return NET_TOOSMALL;
donatien 0:3b2f052c333b 55 }
donatien 0:3b2f052c333b 56
donatien 0:3b2f052c333b 57 m_responseMtx.lock();
donatien 0:3b2f052c333b 58 m_result = result;
donatien 0:3b2f052c333b 59 m_maxResultLength = maxLength;
donatien 0:3b2f052c333b 60 m_responseMtx.unlock();
donatien 0:3b2f052c333b 61
donatien 0:3b2f052c333b 62 m_responseSphre.wait(0); //Make sure there is not a pending result that needs to be discarded
donatien 0:3b2f052c333b 63
donatien 0:3b2f052c333b 64 DBG("Send USSD command & register for unsolicited result codes");
donatien 0:3b2f052c333b 65 //Send USSD command to the network
donatien 0:3b2f052c333b 66 char cmd[32];
donatien 0:3b2f052c333b 67 std::sprintf(cmd, "AT+CUSD=1,\"%s\"", command);
donatien 0:3b2f052c333b 68 int ret = m_pIf->executeSimple(cmd, NULL, DEFAULT_TIMEOUT);
donatien 0:3b2f052c333b 69 if( ret != OK )
donatien 0:3b2f052c333b 70 {
donatien 0:3b2f052c333b 71 return NET_PROTOCOL;
donatien 0:3b2f052c333b 72 }
donatien 0:3b2f052c333b 73
donatien 0:3b2f052c333b 74 //Now wait for response
donatien 0:3b2f052c333b 75 int res = m_responseSphre.wait(USSD_TIMEOUT);
donatien 0:3b2f052c333b 76
donatien 0:3b2f052c333b 77 //Reset data
donatien 0:3b2f052c333b 78 m_responseMtx.lock();
donatien 0:3b2f052c333b 79 m_result = NULL;
donatien 0:3b2f052c333b 80 m_maxResultLength = 0;
donatien 0:3b2f052c333b 81 m_responseMtx.unlock();
donatien 0:3b2f052c333b 82
donatien 0:3b2f052c333b 83 if(res <= 0)
donatien 0:3b2f052c333b 84 {
donatien 0:3b2f052c333b 85 DBG("No result received");
donatien 0:3b2f052c333b 86 ret = m_pIf->executeSimple("AT+CUSD=2", NULL, DEFAULT_TIMEOUT); //Cancel command
donatien 0:3b2f052c333b 87 if( ret != OK )
donatien 0:3b2f052c333b 88 {
donatien 0:3b2f052c333b 89 return NET_PROTOCOL;
donatien 0:3b2f052c333b 90 }
donatien 0:3b2f052c333b 91 return NET_TIMEOUT;
donatien 0:3b2f052c333b 92 }
donatien 0:3b2f052c333b 93
donatien 0:3b2f052c333b 94 DBG("Result received: %s", result);
donatien 0:3b2f052c333b 95
donatien 0:3b2f052c333b 96 return OK;
donatien 0:3b2f052c333b 97
donatien 0:3b2f052c333b 98 }
donatien 0:3b2f052c333b 99
donatien 0:3b2f052c333b 100 /*virtual*/ bool USSDInterface::isATCodeHandled(const char* atCode) //Is this AT code handled
donatien 0:3b2f052c333b 101 {
donatien 0:3b2f052c333b 102 DBG("AT code is %s", atCode);
donatien 0:3b2f052c333b 103 if( strcmp("+CUSD", atCode) == 0 )
donatien 0:3b2f052c333b 104 {
donatien 0:3b2f052c333b 105 return true;
donatien 0:3b2f052c333b 106 }
donatien 0:3b2f052c333b 107
donatien 0:3b2f052c333b 108 DBG("Not handled");
donatien 0:3b2f052c333b 109 return false;
donatien 0:3b2f052c333b 110 }
donatien 0:3b2f052c333b 111
donatien 0:3b2f052c333b 112 /*virtual*/ void USSDInterface::onDispatchStart()
donatien 0:3b2f052c333b 113 {
donatien 0:3b2f052c333b 114
donatien 0:3b2f052c333b 115
donatien 0:3b2f052c333b 116 }
donatien 0:3b2f052c333b 117
donatien 0:3b2f052c333b 118 /*virtual*/ void USSDInterface::onDispatchStop()
donatien 0:3b2f052c333b 119 {
donatien 0:3b2f052c333b 120
donatien 0:3b2f052c333b 121 }
donatien 0:3b2f052c333b 122
donatien 0:3b2f052c333b 123 /*virtual*/ void USSDInterface::onEvent(const char* atCode, const char* evt)
donatien 0:3b2f052c333b 124 {
donatien 0:3b2f052c333b 125 if( strcmp("+CUSD", atCode) != 0 )
donatien 0:3b2f052c333b 126 {
donatien 0:3b2f052c333b 127 return; //Not supported
donatien 0:3b2f052c333b 128 }
donatien 0:3b2f052c333b 129
donatien 0:3b2f052c333b 130 char* pStart = (char*) strchr(evt,'\"');
donatien 0:3b2f052c333b 131 if(pStart==NULL)
donatien 0:3b2f052c333b 132 {
donatien 0:3b2f052c333b 133 return; //Invalid/incomplete response
donatien 0:3b2f052c333b 134 }
donatien 0:3b2f052c333b 135 pStart++; //Point to first char of response
donatien 0:3b2f052c333b 136 char* pEnd = (char*) strchr(pStart,'\"');
donatien 0:3b2f052c333b 137 if(pEnd==NULL)
donatien 0:3b2f052c333b 138 {
donatien 0:3b2f052c333b 139 return; //Invalid/incomplete response
donatien 0:3b2f052c333b 140 }
donatien 0:3b2f052c333b 141 m_responseMtx.lock();
donatien 0:3b2f052c333b 142 if(m_maxResultLength == 0) //No pending command
donatien 0:3b2f052c333b 143 {
donatien 0:3b2f052c333b 144 m_responseMtx.unlock();
donatien 0:3b2f052c333b 145 return;
donatien 0:3b2f052c333b 146 }
donatien 0:3b2f052c333b 147 size_t cpyLen = MIN( pEnd - pStart, m_maxResultLength - 1 );
donatien 0:3b2f052c333b 148 memcpy(m_result, pStart, cpyLen);
donatien 0:3b2f052c333b 149 m_result[cpyLen] = '\0';
donatien 0:3b2f052c333b 150 m_responseMtx.unlock();
donatien 0:3b2f052c333b 151 m_responseSphre.release(); //Signal user thread that response is ready
donatien 0:3b2f052c333b 152 }