/dev/net/kd/time

Ioctl listing

typedef struct _skd_timebuf//This is used by all ioctls for at least outbuf. For ioctl 0x18, inbuf addr & 3 is written to retval.
{
       s32 retval;//Zero for success, -30 when "Universal time is not ready.".
       u64 time;//UTC time in seconds.
} kd_timebuf;

Request number	Name	Input	Output	Notes
0x14	NWC24iGetUniversalTime	none	12 bytes	Writes the current UTC time to inbuf kd_timebuf->time.
0x15	NWC24iSetUniversalTime	12 bytes	4 bytes	Sets the current UTC time to inbuf kd_timebuf->time.
0x16	Undefined	none	none	always returns -9
0x17	NWC24iSetRtcCounter	8 bytes	4 bytes	Corrects the internal KD RTC by adding the input u64.
0x18	NWC24iGetTimeDifference	none	12 bytes

Detailed Description

/dev/net/kd/time is used to get and set utc and rtc offsets. this is used by things like nwc24's scheduler and the module handles reading and editing of /shared2/wc24/misc.bin

KD_GetUTCTime

no inbuffer

outbuffer must be >= 0xC bytes and must be 0x4 aligned

if outbuffer is not >= 0xC bytes or outbuffer == NULL the IOS_Ioctl will return -4, else it returns 0

checks if a word is set in the module's memory that indicates the Universal time is ready and returns -30 in outbuffer->retval if not

outbuffer->time is set to the stored utc otherwise

KD_SetUTCTime

inbuffer must be >= 0xC bytes and must be 0x4 aligned

outbuffer must be >= 0x4 bytes and must be 0x4 aligned

if outbuffer or inbuffer is NULL or are not aligned the IOS_Ioctl will return -4, else it returns 0

struct inbuffer { u64 utc, u32 other_value };

checks that 0x30df3b00 <= utc <= 0xdfaef080 else it sets outbuffer->retval to -3

if utc is ok, it sets the module's struct containing the utc and the other_value

Undefined

no buffers checked

always returns -9 from IOS_Ioctl

NWC24iSetRtcCounter

inbuffer must be >= 0x8 bytes and must be 0x4 aligned

outbuffer must be >= 0x4 bytes and must be 0x4 aligned

if outbuffer or inbuffer is NULL or not aligned the IOS_Ioctl will return -4, else it returns 0

struct inbuffer { u32 rtc_value, u32 other_value };

other_value is checked for the lowest bit to be either 0 or 1 which sets a word in memory

this function messes with the /shared2/wc24/misc.bin file and by reading and writing utc data to/from it

it also sets utc when it needs to be synchronized due to offset

outbuffer->retval will always hold 0 if the IOS_Ioctl doesn't return -4

NWC24iGetTimeDifference

inbuffer is not checked

outbuffer must be >= 0xC bytes and must be 0x4 aligned

if outbuffer is NULL or not aligned the IOS_Ioctl will return -4

if the module's memory indicates no time difference the IOS_Ioctl will return -30

else it returns 0

outbuffer->retval could hold the outbuffer address & 3 if:

a) it wasn't doing a 32bit write to an unaligned address

b) it didn't jump to return -4 from the Ioctl when it was unaligned

so it'll always hold 0

outbuffer->time will hold the timedifference