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#include "guid.hpp"
#include <ipmid/api.h>
#include <mapper.h>
#include <phosphor-logging/log.hpp>
#include <sstream>
#include <string>
using namespace phosphor::logging;
namespace cache
{
command::Guid guid;
} // namespace cache
namespace command
{
std::unique_ptr<sdbusplus::bus::match_t> matchPtr(nullptr);
static constexpr auto guidObjPath = "/org/openbmc/control/chassis0";
static constexpr auto propInterface = "org.freedesktop.DBus.Properties";
Guid getSystemGUID()
{
// Canned System GUID for QEMU where the Chassis DBUS object is not
// populated
Guid guid = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10};
constexpr auto chassisIntf = "org.openbmc.control.Chassis";
sd_bus_message* reply = nullptr;
sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus* bus = ipmid_get_sd_bus_connection();
char* uuid = nullptr;
char* busname = nullptr;
do
{
int rc = mapper_get_service(bus, guidObjPath, &busname);
if (rc < 0)
{
log<level::ERR>("Failed to get bus name",
entry("PATH=%s", guidObjPath),
entry("ERROR=%s", strerror(-rc)));
break;
}
rc = sd_bus_call_method(bus, busname, guidObjPath, propInterface, "Get",
&error, &reply, "ss", chassisIntf, "uuid");
if (rc < 0)
{
log<level::ERR>("Failed to call Get Method",
entry("ERROR=%s", strerror(-rc)));
break;
}
rc = sd_bus_message_read(reply, "v", "s", &uuid);
if (rc < 0 || uuid == NULL)
{
log<level::ERR>("Failed to get a response",
entry("ERROR=%s", strerror(-rc)));
break;
}
std::string readUUID(uuid);
auto len = readUUID.length();
for (size_t iter = 0, inc = 0; iter < len && inc < BMC_GUID_LEN;
iter += 2, inc++)
{
uint8_t hexVal =
std::strtoul(readUUID.substr(iter, 2).c_str(), NULL, 16);
guid[inc] = hexVal;
}
} while (0);
sd_bus_error_free(&error);
reply = sd_bus_message_unref(reply);
free(busname);
return guid;
}
void registerGUIDChangeCallback()
{
if (matchPtr == nullptr)
{
using namespace sdbusplus::bus::match::rules;
sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
matchPtr = std::make_unique<sdbusplus::bus::match_t>(
bus,
path_namespace(guidObjPath) + type::signal() +
member("PropertiesChanged") + interface(propInterface),
[](sdbusplus::message::message&) {
cache::guid = getSystemGUID();
});
}
}
} // namespace command
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