IS JRR - Revision history

Flame CZE at 11:42, 14 February 2026

2026-02-14T11:42:38Z

Bokujishin at 17:55, 10 February 2026

2026-02-10T17:55:02Z

Bokujishin: Created page with "== Introduction == The '''J'''oin '''R'''equest '''R'''eply packet is used to allow/reject join requests when ISF_JRR is set in IS_ISI, or to move existing cars. {| clas..."

2026-02-10T17:54:05Z

Created page with "== Introduction == The '''J'''oin '''R'''equest '''R'''eply packet is used to allow/reject join requests when ISF_JRR is set in IS_ISI, or to move existing cars. {| clas..."

New page

== Introduction ==

The '''J'''oin '''R'''equest '''R'''eply packet is used to allow/reject join requests when ISF_JRR is set in [[IS_ISI]], or to move existing cars.

{| class="wikitable"
|+ IS_JRR packet properties
|-
! Type !! Name !! Description
|-
| byte || Size || 16
|-
| byte || Type || ISP_JRR
|-
| byte || ReqI || 0
|-
| byte || PLID || ZERO when this is a reply to a join request - SET to move a car
|-
| byte || UCID || set when this is a reply to a join request - ignored when moving a car
|-
| byte || JRRAction || 1 - allow / 0 - reject (should send message to user)
|-
| byte || Sp2 ||
|-
| byte || Sp3 ||
|-
| ObjectInfo || StartPos || 0: use default start point / Flags = 0x80: set start point
|}

== Packet Details ==

=== Size ===

The size of the packet is always 16 bytes.

=== Type ===

The packet type from the [[InSim_enumerations#ISP|ISP_]] enumeration, always ISP_JRR.

=== ReqI ===

ReqI is always equal to zero.

=== PLID ===

Zero when this is a reply to a join request, or a real PLID to move an existing car.

=== UCID ===

Set when this is a reply to a join request, ignored when moving an existing car.

=== JRRAction ===

The action to perform, from the [InSim_enumerations#JRR|JRR_]] enumeration.

Valid values for replies to join requests:
* JRR_REJECT: Reject the join request
* JRR_SPAWN: Accept the join request

Valid values for moving existing cars:
* JRR_RESET: Resets the cars (including repairs)
* JRR_RESET_NO_REPAIR: Resets the car without repairing it

=== StartPos ===

An [[InSim_structs#ObjectInfo|ObjectInfo]] used to define the spawn/reset point. If it is filled with zeros, the default start point is used. Otherwise, it should have 0x80 for Flags, a 0 Index, and a position/heading to spawn the car.

=== Notes ===

You do not need to set ISF_JRR to teleport cars.

When ISF_JRR is set, you need to reply to join requests, which appear as [[IS_NPL]] packets with a NumP of zero. If you do not reply with an IS_JRR packet, the player will be able to join after a short delay. In this situation, only one player can join in the response delay, so crowded servers with frequent joins will have to queue.

[[Category:InSim packets]]

@@ Line 1: / Line 1: @@
-== Introduction ==
+{{Infobox InSim packet
 The '''J'''oin '''R'''equest '''R'''eply packet is used to allow/reject join requests when ISF_JRR is set in [[IS_ISI]], or to move existing cars.
 {| class="wikitable"
@@ Line 26: / Line 36: @@
 | ObjectInfo || StartPos || 0: use default start point / Flags = 0x80: set start point
 |}
 === Size ===
@@ Line 70: / Line 78: @@
 When ISF_JRR is set, you need to reply to join requests, which appear as [[IS_NPL]] packets with a NumP of zero. If you do not reply with an IS_JRR packet, the player will be able to join after a short delay. In this situation, only one player can join in the response delay, so crowded servers with frequent joins will have to queue.
 [[Category:InSim packets]]

@@ Line 51: / Line 51: @@
 === JRRAction ===
-The action to perform, from the [InSim_enumerations#JRR|JRR_]] enumeration.
+The action to perform, from the [[InSim_enumerations#JRR|JRR_]] enumeration.
 Valid values for replies to join requests: