IS SMALL - Revision history

Flame CZE at 21:50, 13 February 2026

2026-02-13T21:50:28Z

Flame CZE at 19:09, 13 February 2026

2026-02-13T19:09:31Z

Bokujishin at 19:43, 9 February 2026

2026-02-09T19:43:11Z

Bokujishin at 15:52, 9 February 2026

2026-02-09T15:52:19Z

Flame CZE at 00:56, 2 December 2023

2023-12-02T00:56:22Z

DarkTimes at 18:03, 22 June 2009

2009-06-22T18:03:30Z

DarkTimes at 17:53, 22 June 2009

2009-06-22T17:53:33Z

DarkTimes at 17:50, 22 June 2009

2009-06-22T17:50:22Z

New page

== Introduction ==

The IS_SMALL packet is a general purpose packet comprised of 8 bytes. The packet is designed to prevent repeating a common structure which would be the same for many packets. Unlike the [[IS_TINY]] the IS_SMALL also contains the UVal, a 4 byte unsigned integer.

== Packet Detail ==

=== Size ===

The size of the packet, always 8 bytes.

=== Type ===

The packet type from the ISP_ enumeration, always 4.

=== ReqI ===

The ReqI must always be set to non-zero when sending a request to LFS for information, and in turn the replying packet will contain the same value set in its ReqI.

=== SubT ===

* SMALL_NONE: Not used
* SMALL_SSP: Request to start sending OutSim packets at the specified interval
* SMALL_SSG: Request to start sending OutGauge packets at the specified interval
* SMALL_VTA: Send to set the current vote action, from the VOTE_ enumeration
* SMALL_TMS: Send in single-player mode to stop time, 1 means to stop and 0 to carry on. This freezes the game but is not the same as pausing, as the game must be unfrozen before any further actions can be undertaken
* SMALL_STP: Send when frozen to update the game time by the specified hundredths
* SMALL_RTP: Sent in response to a [[IS_TINY]] with a SubT of TINY_GTH. Contains the time in hundredths
* SMALL_NLI: Send to set the [[IS_NLP]] node lap interval

=== UVal ===

A general purpose 4 byte unsigned integer, the meaning of which varies depending on the SubT.

@@ Line 7: / Line 7: @@
 | category      = General purpose
 | prev          = [[IS_TINY]]
-| next          = [[IS_TTC]]
+| next          = [[IS_STA]]
 }}

@@ Line 1: / Line 1: @@
-== Introduction ==
+{{Infobox InSim packet
-The IS_SMALL packet is a general purpose packet comprised of 8 bytes. The packet is designed to prevent repeating a common structure which would be the same for many packets. Unlike the [[IS_TINY]] the IS_SMALL also contains the UVal, a 4 byte unsigned integer.
+The '''IS_SMALL''' packet is a general purpose packet comprised of 8 bytes. The packet is designed to prevent repeating a common structure which would be the same for many packets. Unlike the [[IS_TINY]] the IS_SMALL also contains the UVal, a 4 byte unsigned integer.
 {| class="wikitable"
@@ Line 28: / Line 39: @@
 | value (e.g. for SMALL_SSP this would be the OutSim packet rate)
 |}
 === Size ===
@@ Line 65: / Line 74: @@
 A general purpose 4-byte unsigned integer, the meaning of which varies depending on [[#SubT|SubT]].
 [[Category:InSim packets]]

@@ Line 3: / Line 3: @@
 The IS_SMALL packet is a general purpose packet comprised of 8 bytes. The packet is designed to prevent repeating a common structure which would be the same for many packets. Unlike the [[IS_TINY]] the IS_SMALL also contains the UVal, a 4 byte unsigned integer.
-<big><pre>struct IS_SMALL // General purpose 8 byte packet
+{| class="wikitable"
+|+ IS_SMALL packet properties
-	byte	Size;		// 8
+|-
-	byte	Type;		// ISP_SMALL
+! Type !! Name !! Description
-	byte	ReqI;		// 0 unless it is an info request or a reply to an info request
+|-
-	byte	SubT;		// subtype, from SMALL_ enumeration (e.g. SMALL_SSP)
+| byte
+| Size
-	unsigned	UVal;	// value (e.g. for SMALL_SSP this would be the OutSim packet rate)
+| 8
-};</pre></big>
+|-
 == Packet Details ==
@@ Line 21: / Line 37: @@
 === Type ===
-The packet type from the ISP_ enumeration, always ISP_SMALL.
+The packet type from the [[InSim_enumerations#ISP|ISP_]] enumeration, always ISP_SMALL.
 === ReqI ===
@@ Line 29: / Line 45: @@
 === SubT ===
-The packet's sub-type, which is a value from the SMALL_ enum.
+The packet's sub-type, which is a value from the [[InSim_enumerations#SMALL|SMALL_]] enum.
 * SMALL_NONE: Not used
@@ Line 48: / Line 64: @@
 === UVal ===
-A general purpose 4-byte unsigned integer, the meaning of which varies depending on SubT.
+A general purpose 4-byte unsigned integer, the meaning of which varies depending on [[#SubT|SubT]].
 [[Category:InSim packets]]

@@ Line 5: / Line 5: @@
 <big><pre>struct IS_SMALL // General purpose 8 byte packet
+{
-	byte Size;		// always 8
+	byte	Size;		// 8
-	byte Type;		// always ISP_SMALL
+	byte	Type;		// ISP_SMALL
-	byte ReqI;		// 0 unless it is an info request or a reply to an info request
+	byte	ReqI;		// 0 unless it is an info request or a reply to an info request
-	byte SubT;		// subtype, from SMALL_ enumeration (e.g. SMALL_SSP)
+	byte	SubT;		// subtype, from SMALL_ enumeration (e.g. SMALL_SSP)
-	unsigned UVal;	// value (e.g. for SMALL_SSP this would be the OutSim packet rate)
+	unsigned	UVal;	// value (e.g. for SMALL_SSP this would be the OutSim packet rate)
 };</pre></big>
-== Packet Detail ==
+== Packet Details ==
 === Size ===
@@ Line 25: / Line 25: @@
 === ReqI ===
-The ReqI must always be set to non-zero when sending a request to LFS for information, and in turn the replying packet will contain the same value set in its ReqI.
+ReqI must be set to non-zero when sending a request for information to LFS, and in turn the replying packet will contain the same value set in its ReqI. For packets sent by LFS without a request, ReqI is zero.
 === SubT ===
 * SMALL_NONE: Not used
@@ Line 35: / Line 37: @@
 * SMALL_TMS: Send in single-player mode to stop time, 1 means to stop and 0 to carry on. This freezes the game but is not the same as pausing, as the game must be unfrozen before any further actions can be undertaken
 * SMALL_STP: Send when frozen to update the game time by the specified hundredths
-* SMALL_RTP: Sent in response to a [[IS_TINY]] with a SubT of TINY_GTH. Contains the time in hundredths
+* SMALL_RTP: Sent in response to an [[IS_TINY]] with a SubT of TINY_GTH. Contains the time in ms.
-* SMALL_NLI: Send to set the [[IS_NLP]] node lap interval
+* SMALL_NLI: Send to set the [[IS_NLP]]/[[IS_MCI]] interval
 === UVal ===
-A general purpose 4 byte unsigned integer, the meaning of which varies depending on the SubT.
+A general purpose 4-byte unsigned integer, the meaning of which varies depending on SubT.
 [[Category:InSim packets]]

←Older revision		Revision as of 00:56, 2 December 2023
Line 41:		Line 41:

	A general purpose 4 byte unsigned integer, the meaning of which varies depending on the SubT.		A general purpose 4 byte unsigned integer, the meaning of which varies depending on the SubT.
		+
		+	[[Category:InSim packets]]

←Older revision		Revision as of 17:53, 22 June 2009
Line 2:		Line 2:

	The IS_SMALL packet is a general purpose packet comprised of 8 bytes. The packet is designed to prevent repeating a common structure which would be the same for many packets. Unlike the [[IS_TINY]] the IS_SMALL also contains the UVal, a 4 byte unsigned integer.		The IS_SMALL packet is a general purpose packet comprised of 8 bytes. The packet is designed to prevent repeating a common structure which would be the same for many packets. Unlike the [[IS_TINY]] the IS_SMALL also contains the UVal, a 4 byte unsigned integer.
		+
		+	<big><pre>struct IS_SMALL // General purpose 8 byte packet
		+	{
		+	byte Size; // always 8
		+	byte Type; // always ISP_SMALL
		+	byte ReqI; // 0 unless it is an info request or a reply to an info request
		+	byte SubT; // subtype, from SMALL_ enumeration (e.g. SMALL_SSP)
		+
		+	unsigned UVal; // value (e.g. for SMALL_SSP this would be the OutSim packet rate)
		+	};</pre></big>

	== Packet Detail ==		== Packet Detail ==