IS TTC

IS_TTC
General purpose 8-byte packet
Overview
Size	8
Type	ISP_TTC (61)
Usage	instruction
Previous packet IS_SMALL	Next packet IS_STA

The Target To Connection packet is sent to LFS to request information about a remote connection.

Packet details

IS_TTC packet properties

Type	Name	Description
byte	Size	8
byte	Type	ISP_TTC
byte	ReqI	0 unless it is an info request or a reply to an info request
byte	SubT	subtype, from TTC_ enumeration (e.g. TTC_SEL)
byte	UCID	connection's unique id (0 = local)
byte	B1	B1, B2, B3 may be used in various ways depending on SubT
byte	B2
byte	B3

Size

The packet size, always 8 bytes.

Type

The packet type from the ISP_ enumeration, always ISP_TTC.

ReqI

For an info request, this value must bet non-zero, and LFS will include the same ReqI in its reply. Otherwise, it should be zero.

SubT

The packet's subtype, which is a value from the TTC_ enumeration.

• TTC_NONE: Not used.
• TTC_SEL: Send to request an IS_AXM packet for the current layout editor selection.
• TTC_SEL_START: Send to request an IS_AXM packet very time the layout editor selection changes.
• TTC_SEL_STOP: Send to stop receiving [IS_AXM]] packets for every layout editor selection change.

UCID

The connection's unique ID. A value of 0 represents the local connection.

Values

B1, B2, and B3 can contain data depending on the value of SubT. At the time of writing (LFS 0.8B/InSim 10), no sub-type uses those values.