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Try NOT to crash parsing DV64 CPAP SET.BIN data

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This commit is contained in:
Mark Watkins 2018-06-10 01:11:42 +10:00
parent ab813e4214
commit 1120836ff8
1 changed files with 36 additions and 62 deletions
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98
sleepyhead/SleepLib/loader_plugins/intellipap_loader.cpp
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@ -631,6 +631,38 @@ struct DV6_S_Record
EventDataType pressureSetMax; //50
};
#ifdef _MSC_VER
#define PACK( __Declaration__ ) __pragma( pack(push, 1) ) __Declaration__ __pragma( pack(pop) )
#else
#define PACK( __Declaration__ ) __Declaration__ __attribute__((__packed__))
#endif
PACK(struct SET_BIN_REC {
char unknown_00; // assuming file version
char serial[11]; // null terminated
unsigned short cap_flags; // capability flags
unsigned short cpap_pressure;
unsigned short max_pressure;
unsigned short min_pressure;
unsigned char alg_apnea_threshhold; // always locked at 00
unsigned char alg_apnea_duration;
unsigned char alg_hypop_threshold;
unsigned char alg_hypop_duration;
unsigned short ramp_pressure;
unsigned short ramp_duration;
unsigned char unknown_01[3];
unsigned char smartflex;
unsigned char unknown_02;
unsigned char inspFlowRounding;
unsigned char expFlowRounding;
unsigned char complianceHours;
unsigned char unknown_03[9];
unsigned char humidifier_setting; // 0-5
unsigned char unused[83];
unsigned char checksum;
}); // http://digitalvampire.org/blog/index.php/2006/07/31/why-you-shouldnt-use-__attribute__packed/
int IntellipapLoader::OpenDV6(const QString & path)
{
QString newpath = path + DV6_DIR;
@ -640,7 +672,6 @@ int IntellipapLoader::OpenDV6(const QString & path)
info.series = "DV6";
info.serial = "Unknown";
int vmin=0, vmaj=0;
EventDataType max_pressure=0, min_pressure=0; //, starting_pressure;
@ -651,71 +682,14 @@ int IntellipapLoader::OpenDV6(const QString & path)
/////////////////////////////////////////////////////////////////////////////////
QFile f(newpath+"/"+SET_BIN);
if (f.open(QIODevice::ReadOnly)) {
// Guessing settings is just a binary packed 0 terminated string list
// as in this is a continuation of the old string SET1 settings file, just the value fields.
// Each field is zero terminated
int cnt = 0;
// Read and parse entire SET.BIN file
dataBA = f.readAll();
f.close();
// Parse it as we go...
for (int i=0; i< dataBA.size(); ++i) { // deliberately going one further to catch end condition
if ((dataBA.at(i) == 0) || (i >= dataBA.size()-1)) { // if null terminated or last byte
switch(cnt) {
case 1: // Serial Number
info.serial = QString(str);
break;
case 2: // Firmware version?
vmaj = (unsigned char)str.at(0);
vmin = (unsigned char)str.at(1);
break;
case 3: // ??? 0x64 100 // Starting Pressure?
//starting_pressure = (unsigned char)str.at(0);
// or is it 64, as in BCD coded model number?
break;
case 4: // Max Pressure
max_pressure = (unsigned char)str.at(0);
break;
case 5: // Min Pressure
min_pressure = (unsigned char)str.at(0);
break;
case 6: // The settings that were used to flag OA's and Hyp's...
//OA_min = (unsigned char)str.at(0); // minimum OA duration
//OA_thresh = (unsigned char)str.at(1); // OA flow restriction threshold
//HY_min = (unsigned char)str.at(2); // minimum Hyp duration
//HY_thresh = (unsigned char)str.at(3); // Hyp flow restriction threshold
break;
case 7:
//ramp_time = (unsigned char)str.at(0);
// ??? 250 = (unsigned char)str.at(1); // 25.0 (div 10) is maximum CPAP pressure
break;
case 8: // 0
break;
case 9: // 01
break;
case 10:
//SFFRI = (unsigned char)str.at(0); //Smartflex flow rounding inhalation setting
//SFFRE = (unsigned char)str.at(1); //Smartflex flow rounding exhalation setting
//??? = (unsigned char)str.at(2); // 0x04
break;
case 11: // 0
break;
case 12:
default:
break;
}
// Clear and start a new data record
str.clear();
cnt++;
} else {
// Add the character to the current string
str.append(dataBA[i]);
}
}
SET_BIN_REC *setbin = (SET_BIN_REC *)dataBA.data();
info.serial = QString(setbin->serial);
max_pressure = setbin->max_pressure;
min_pressure = setbin->min_pressure;
} else { // if f.open settings file
// Settings file open failed, return