IS ISI - Revision history

Flame CZE at 18:48, 13 February 2026

2026-02-13T18:48:38Z

2026-02-13T18:48:31Z

2026-02-13T18:40:58Z

2026-02-13T18:40:47Z

2026-02-13T18:39:02Z

2026-02-13T18:38:42Z

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2026-02-13T14:24:14Z

2026-02-13T14:22:30Z

←Older revision		Revision as of 18:48, 13 February 2026
Line 1:		Line 1:
−	~~{{DISPLAYTITLE:new title}}~~
−
	{{Infobox InSim packet		{{Infobox InSim packet
	\| description = InSim initialisation		\| description = InSim initialisation

←Older revision		Revision as of 18:48, 13 February 2026
Line 1:		Line 1:
		+	{{DISPLAYTITLE:new title}}
		+
	{{Infobox InSim packet		{{Infobox InSim packet
	\| description = InSim initialisation		\| description = InSim initialisation

@@ Line 90: / Line 90: @@
 A short name for your program, up to 15 characters in length (the last byte must be 0, so only 15 characters are available). Can contain colour codes.
-== Error Messages ==
+== Error messages ==
 There are several error messages which can appear when attempting to initialise InSim.

@@ Line 11: / Line 11: @@
 The '''I'''n'''S'''im '''I'''nitialsation packet. This packet is sent to LFS to initialise the InSim system upon first connecting.
-== Packet Details ==
+== Packet details ==
 {| class="wikitable"

@@ Line 10: / Line 10: @@
 The '''I'''n'''S'''im '''I'''nitialsation packet. This packet is sent to LFS to initialise the InSim system upon first connecting.
 {| class="wikitable"
@@ Line 38: / Line 40: @@
 | char || IName[16] || A short name for your program
 |}
 === Size ===

@@ Line 8: / Line 8: @@
 | next          = [[IS_VER]]
 }}
 The '''I'''n'''S'''im '''I'''nitialsation packet. This packet is sent to LFS to initialise the InSim system upon first connecting.

@@ Line 1: / Line 1: @@
 {{Infobox InSim packet
 | size          = 44
 | type_key      = ISP_ISI

@@ Line 3: / Line 3: @@
 | type_key      = ISP_ISI
 | type_value    = 1
-| usage         = Info
+| direction     = out
 | category      = Initialisation
 | next          = [[IS_VER]]
 }}

@@ Line 100: / Line 100: @@
 * password does not match your multiplayer admin password: Simply means that the Admin password you've supplied is incorrect.
 * first byte in packet does not represent size: A common error message seen when trying to connect using an old version of InSim, which used a different format for the packet header. Make sure that the packet definitions you are using are from the most up-to-date version of InSim, which is version 10 at the time of writing.
-* first packet has unexpected size - should be ISI: This error can be cause by the previous one, or if you send any packet before sending an IS_ISI to initialise the connection.
+* first packet has unexpected size - should be ISI: This error can be caused by the previous one, or if you send any packet before sending an IS_ISI to initialise the connection.
 {{InSim packets}}
 [[Category:InSim packets]]

@@ Line 15: / Line 15: @@
 {| class="wikitable"
-|+ IS_MSL packet properties
+|+ IS_ISI packet properties
 |-
 ! Type !! Name !! Description
 |-
-| byte
+| byte || Size || 44
 |-
-| byte
+| byte || Type || ISP_ISI
 |-
-| byte
+| byte || ReqI || If non-zero LFS will send an IS_VER packet
 |-
-| byte
+| byte || Zero || 0
 |-
-| word
+| word || UDPPort || Port for UDP replies from LFS (0 to 65535)
 |-
-| word
+| word || Flags || Bit flags for options (see below)
 |-
-| byte
+| byte || InSimVer || The INSIM_VERSION used by your program
 |-
-| byte
+| byte || Prefix || Special host message prefix character
 |-
-| word
+| word || Interval || Time in ms between NLP or MCI (0 = none)
 |-
-| char
+| char || Admin[16] || Admin password (if set in LFS)
 |-
-| char
+| char || IName[16] || A short name for your program
 |}