void genControlInfo(int* oid,
size_t oid_size,
QueryData& results,
const std::map<std::string, std::string>& config) {
// Get control size
size_t response_size = CTL_MAX_VALUE;
char response[CTL_MAX_VALUE + 1] = {0};
if (sysctl(oid, oid_size, response, &response_size, 0, 0) != 0) {
// Cannot request MIB data.
return;
}
// Data is output, but no way to determine type (long, int, string, struct).
Row r;
r["oid"] = stringFromMIB(oid, oid_size);
r["current_value"] = std::string(response);
r["type"] = "string";
results.push_back(r);
}
void genControlInfo(int* oid,
size_t oid_size,
QueryData& results,
const std::map<std::string, std::string>& config) {
Row r;
if (oid_size == 0) {
return;
}
r["oid"] = stringFromMIB(oid, oid_size);
// Request the description (the canonical name) for the MIB.
char response[CTL_MAX_VALUE] = {0};
size_t response_size = CTL_MAX_VALUE;
int request[CTL_MAXNAME + 2] = {0, CTL_DEBUG_DESCRIPTION};
memcpy(request + 2, oid, oid_size * sizeof(int));
if (sysctl(request, oid_size + 2, response, &response_size, 0, 0) != 0) {
return;
}
r["name"] = std::string(response);
if (oid[0] > 0 && oid[0] < static_cast<int>(kControlNames.size())) {
r["subsystem"] = kControlNames[oid[0]];
}
// Now request structure type.
request[1] = CTL_DEBUG_TYPE;
if (sysctl(request, oid_size + 2, response, &response_size, 0, 0) != 0) {
// Cannot request MIB type (int, string, struct, etc).
return;
}
size_t oid_type = 0;
if (response_size > 0) {
oid_type = ((size_t)response[0] & CTLTYPE);
if (oid_type < kControlTypes.size()) {
r["type"] = kControlTypes[((int)response[0])];
}
}
// Finally request MIB value.
if (oid_type > CTLTYPE_NODE && oid_type < CTLTYPE_OPAQUE) {
size_t value_size = 0;
sysctl(oid, oid_size, 0, &value_size, 0, 0);
if (value_size > CTL_MAX_VALUE) {
// If the value size is larger than the max value, limit.
value_size = CTL_MAX_VALUE;
}
sysctl(oid, oid_size, response, &value_size, 0, 0);
if (oid_type == CTLTYPE_INT) {
unsigned int value;
memcpy(&value, response, sizeof(int));
r["current_value"] = INTEGER(value);
} else if (oid_type == CTLTYPE_STRING) {
r["current_value"] = std::string(response);
} else if (oid_type == CTLTYPE_QUAD) {
unsigned long long value;
memcpy(&value, response, value_size);
}
}
// If this MIB was set using sysctl.conf add the value.
if (config.count(r.at("name")) > 0) {
r["config_value"] = config.at(r["name"]);
}
results.push_back(r);
}
void genControlInfo(int* oid,
size_t oid_size,
QueryData& results,
const std::map<std::string, std::string>& config) {
Row r;
if (oid_size == 0) {
return;
}
r["oid"] = stringFromMIB(oid, oid_size);
// Request the description (the canonical name) for the MIB.
char response[CTL_MAX_VALUE] = {0};
size_t response_size = CTL_MAX_VALUE;
int request[CTL_MAXNAME + 2] = {0, CTL_DEBUG_DESCRIPTION};
memcpy(request + 2, oid, oid_size * sizeof(int));
if (sysctl(request, oid_size + 2, response, &response_size, 0, 0) != 0) {
return;
}
r["name"] = std::string(response);
if (oid[0] > 0 && oid[0] < static_cast<int>(kControlNames.size())) {
r["subsystem"] = kControlNames[oid[0]];
}
// Now request structure type.
response_size = CTL_MAX_VALUE;
request[1] = CTL_DEBUG_TYPE;
if (sysctl(request, oid_size + 2, response, &response_size, 0, 0) != 0) {
// Cannot request MIB type (int, string, struct, etc).
return;
}
size_t oid_type = 0;
if (response_size > 0) {
oid_type = ((size_t)response[0] & CTLTYPE);
if ((oid_type == 0 || oid_type == CTLTYPE_INT) && response_size > 4) {
// For whatever reason, macOS defines fewer CTLTYPE's than BSD, and
// sometimes uses the format character instead of (or in addition to)
// the CTLTYPE to specify the type. Here we detect a few such cases and
// map them to CTLTYPE's.
// TODO: Both CTLTYPE_INT and CTLTYPE_QUAD can be specified as unsigned
// using a similar method.
char type_char = response[4];
switch (type_char) {
case 'I':
oid_type = CTLTYPE_INT;
break;
case 'L':
if (sizeof(long) == sizeof(long long)) {
oid_type = CTLTYPE_QUAD;
} else if (sizeof(long) == sizeof(int)) {
oid_type = CTLTYPE_INT;
}
break;
case 'S':
oid_type = CTLTYPE_STRUCT;
break;
case 'Q':
oid_type = CTLTYPE_QUAD;
break;
// Otherwise leave the type as it was; we have no additional knowledge
}
}
if (oid_type < kControlTypes.size()) {
r["type"] = kControlTypes[oid_type];
}
}
// Finally request MIB value.
if (oid_type > CTLTYPE_NODE && oid_type < CTLTYPE_OPAQUE) {
size_t value_size = 0;
sysctl(oid, oid_size, 0, &value_size, 0, 0);
if (value_size > CTL_MAX_VALUE) {
// If the value size is larger than the max value, limit.
value_size = CTL_MAX_VALUE;
}
sysctl(oid, oid_size, response, &value_size, 0, 0);
if (oid_type == CTLTYPE_INT) {
unsigned int value;
memcpy(&value, response, sizeof(int));
r["current_value"] = INTEGER(value);
} else if (oid_type == CTLTYPE_STRING) {
r["current_value"] = std::string(response);
} else if (oid_type == CTLTYPE_QUAD) {
unsigned long long value;
memcpy(&value, response, sizeof(unsigned long long));
r["current_value"] = INTEGER(value);
}
}
// If this MIB was set using sysctl.conf add the value.
if (config.count(r.at("name")) > 0) {
r["config_value"] = config.at(r["name"]);
}
results.push_back(r);
}
