IPTV_CMD is a control service for IPTV Control Center. It uses two connections - one for each direction. Device listens for requests on TCP port 9001.

Basic structure

IPTV_CMD packets consists of header and payload. Header has always same meaning regardless of function selected. Payload is dependent on the exact function.

General header consists of:

• cb_ipv4 and cb_port - Callback IP and callback port - LKV373A will try to connect to this address to provide its response
• cmd - command identifier - number of function to call. Responses always have id incremented by one
• len - length of payload
• payload - function dependent
• checksum - least significant byte of sum of bytes - there are two checksums - first secures cmd and len, second the payload

Command List

Value	Function	Notes
0x1	set_dhcp
0x3	set_static_ip
0x5		Set multicast address?
0x7	set_uart_baudrate
0x9	set_mac_address
0xB
0xD
0xF	get_hdcp
0x11	get_video_lock
0x13		Get multicast address?
0x15	get_dhcp
0x17	get_uart_baudrate
0x19	get_static_ip
0x1b	get_mac_address
0x1d	set_device_name
0x1f	get_device_name
0x21
0x23	factory_reset
0x25		Upgrade?
0x27
0x29		(*)
0x2b	set_company_id ?	(*)
0x2d	get_company_id ?	(*)
0x2f		(*) Set multicast mode ?
0x31		(*)
0xf0		Reboot
0xfe		Discovery (second, hidden handler)
0x101	set_video_bitrate
0x105
0x107		Set video modes?
0x109	get_video_bitrate
0x10b
0x10d		Get video modes?
0x10f	get_fw_version
0xffff

(*) - only in IPTV firmware

Command description

0x1 - 0x2: set_dhcp()

Parameters

Name	Type	Range	Meaning
?

Return value

enum { fail = -1, success = 0 } retcode;

0xd - 0xe: ?

• answer payload length: 0x2
• return values: 0, 0

0xf - 0x10: get_hdcp()

Return value

enum status { off = 0, on = 1 };
uint16_t status = (enum status) payload;

Further reading

• lkctl README