connectionless_netmessages.proto

Protobufs / connectionless_netmessages.proto

CS2 build 25218825 · Steam date 2026-09-09 · platform windows-x86_64 · schema format 2.2

Group: CS2 wire formatMessages: 3 top-level, 3 totalEnums: 0 top-level, 0 total

Imports: netmessages.proto

Enums

This file declares no top-level enums.

Messages

C2S_CONNECT_SameProcessCheck

C2S C2 CONNECT SameProcessCheck Same Process Check SameProcess ProcessCheck localhost_process_id key

Referenced by (2): C2S_CONNECTION_Message, C2S_CONNECT_Message

Field	Number	Label	Type	Default	Description
localhost_process_id	1	optional	uint64
key	2	optional	uint64

C2S_CONNECT_Message

C2S C2 CONNECT Message host_version auth_protocol challenge_number reservation_cookie low_violence encrypted_password splitplayers auth_steam challenge_context localhost_same_process_check

Field	Number	Label	Type	Default	Description
host_version	1	optional	uint32
auth_protocol	2	optional	uint32
challenge_number	3	optional	uint32
reservation_cookie	4	optional	fixed64
low_violence	5	optional	bool
encrypted_password	6	optional	bytes
splitplayers	7	repeated	CCLCMsg_SplitPlayerConnect
auth_steam	8	optional	bytes
challenge_context	9	optional	string
localhost_same_process_check	10	optional	C2S_CONNECT_SameProcessCheck

C2S_CONNECTION_Message

C2S C2 CONNECTION Message addon_name localhost_same_process_check

Field	Number	Label	Type	Default	Description
addon_name	1	optional	string
localhost_same_process_check	2	optional	C2S_CONNECT_SameProcessCheck

Reference graph

Message reference graph (3 edges)

flowchart LR
    n0["C2S_CONNECT_Message"]
    n1["CCLCMsg_SplitPlayerConnect"]
    n0 --> n1
    n2["C2S_CONNECT_SameProcessCheck"]
    n0 --> n2
    n3["C2S_CONNECTION_Message"]
    n3 --> n2