libnx/nx/source/services/time.c

#include <string.h>
#include "types.h"
#include "result.h"
#include "ipc.h"
#include "services/time.h"
#include "services/sm.h"

static Service g_timeSrv;
static Service g_timeUserSystemClock;
static Service g_timeNetworkSystemClock;
static Service g_timeTimeZoneService;
static Service g_timeLocalSystemClock;

static Result _timeGetSession(Service* srv_out, u64 cmd_id);

Result timeInitialize(void)
{
    if (serviceIsActive(&g_timeSrv))
        return MAKERESULT(Module_Libnx, LibnxError_AlreadyInitialized);

    Result rc;

    rc = smGetService(&g_timeSrv, "time:u");
    if (R_FAILED(rc))
        return rc;

    rc = _timeGetSession(&g_timeUserSystemClock, 0);

    if (R_SUCCEEDED(rc))
        rc = _timeGetSession(&g_timeNetworkSystemClock, 1);

    if (R_SUCCEEDED(rc))
        rc = _timeGetSession(&g_timeTimeZoneService, 3);

    if (R_SUCCEEDED(rc))
        rc = _timeGetSession(&g_timeLocalSystemClock, 4);

    if (R_FAILED(rc))
        timeExit();

    return rc;
}

void timeExit(void)
{
    if (!serviceIsActive(&g_timeSrv))
        return;

    serviceClose(&g_timeLocalSystemClock);
    serviceClose(&g_timeTimeZoneService);
    serviceClose(&g_timeNetworkSystemClock);
    serviceClose(&g_timeUserSystemClock);
    serviceClose(&g_timeSrv);
}

Service* timeGetSessionService(void) {
    return &g_timeSrv;
}

static Result _timeGetSession(Service* srv_out, u64 cmd_id) {
    IpcCommand c;
    ipcInitialize(&c);

    struct {
        u64 magic;
        u64 cmd_id;
    } *raw;

    raw = ipcPrepareHeader(&c, sizeof(*raw));

    raw->magic = SFCI_MAGIC;
    raw->cmd_id = cmd_id;

    Result rc = serviceIpcDispatch(&g_timeSrv);

    if (R_SUCCEEDED(rc)) {
        IpcParsedCommand r;
        ipcParse(&r);

        struct {
            u64 magic;
            u64 result;
        } *resp = r.Raw;

        rc = resp->result;

        if (R_SUCCEEDED(rc)) {
            serviceCreate(srv_out, r.Handles[0]);
        }
    }

    return rc;
}

Result timeGetCurrentTime(TimeType type, u64 *timestamp) {
    Service *srv = NULL;

    if (type==TimeType_UserSystemClock) {
        srv = &g_timeUserSystemClock;
    }
    else if (type==TimeType_NetworkSystemClock) {
        srv = &g_timeNetworkSystemClock;
    }
    else if (type==TimeType_LocalSystemClock) {
        srv = &g_timeLocalSystemClock;
    }
    else {
        return MAKERESULT(Module_Libnx, LibnxError_BadInput);
    }

    IpcCommand c;
    ipcInitialize(&c);

    struct {
        u64 magic;
        u64 cmd_id;
    } *raw;

    raw = ipcPrepareHeader(&c, sizeof(*raw));

    raw->magic = SFCI_MAGIC;
    raw->cmd_id = 0;

    Result rc = serviceIpcDispatch(srv);

    if (R_SUCCEEDED(rc)) {
        IpcParsedCommand r;
        ipcParse(&r);

        struct {
            u64 magic;
            u64 result;
            u64 timestamp;
        } *resp = r.Raw;

        rc = resp->result;

        if (R_SUCCEEDED(rc) && timestamp) *timestamp = resp->timestamp;
    }

    return rc;
}