Protocol 18 - Battle Royale

[Barbosik]

sv_protocol 18 sv_secret 0x00007539 sv_versionClient 3.0.9 sv_versionProto 9.0.2 Server 20.0.3

Almost all is the same, but there are some new messages were introduced. Primarily related to the new BattleRoyale game mode. Here it is:

F2 - SERVER TIME

B0 - BATTLE TIMER

B1 - BATTLE START

B2 - BATTLE AREA

B3 - BATTLE EVENT

B4 - BATTLE RESULT

If you have any info about these messages, please let me know

[Barbosik]

Here is some details for a new messages

B4 = BATTLE RESULT

Offset	Size	Description
0	byte	=0xB4
1	uint32	finalPosition
5	uint32	playersEaten
9	uint16	record count
11	string	player 1 utf8 zero terminated name
x	uint32	player 1 position
x	string	player 2 utf8 zero terminated name
x	uint32	player 2 position
...	...	...

[Barbosik]

B2 = BATTLE AREA

Offset	Size	Description
0	byte	=0xB2
1	uint16	playerCount (alive player count)
3	uint16	area count?
5	byte	Flags? (present if area count >0)
6	int32	Area 1 X position
10	int32	Area 1 Y position
14	uint32	Area 1 Radius
18	uint32	?Area 1 Color? (zero when area count=1)
22	int32	Area 2 X position
26	int32	Area 2 Y position
30	uint32	Area 2 Radius

I catch the following possible Flags values: 0, 1, 2, 3, 4. some fields of this message should be clarified...

[Barbosik]

B3 = BATTLE EVENT

Offset	Size	Description
0	byte	=0xB3
1	byte	event type
2	string	prey name (utf8 zero terminated string)
x	string	hunter name (utf8 zero terminated string)

Type	Description
0	[hunter] ate [prey]
1	[prey] jumped in a virus
2	[prey] never saw it coming (destroyed by unsafe area)
3	[prey] is no more (last player destroyed by unsafe area)

[Barbosik]

B0 = BATTLE TIMER

Offset	Size	Description
0	byte	=0xB0
1	uint32	battle will be started at this server second

[Barbosik]

B1 = BATTLE START

Offset	Size	Description
0	byte	=0xB1

[Barbosik]

F2 = SERVER TIME

Offset	Size	Description
0	byte	=0xF2
1	uint32	current server time (unix epoch time)

Server sends this message just at begin of connection. It was added on 22 May 2018 with server version 20.0.0.

[Elitis]

Thanks for the share, btw, I was wondering if whether you do any freelance (paid) development?

[Barbosik]

it's just a hobby. I'm playing it with a custom client and don't get any profit from it. It's not a problem to share it. But it can be used by stupid mass botters to develop a new bots. I don't want to help stupid mass-botters, so this is the reason why I didn't shared it.

[SuperOP535]

But you shared it? Or did you mean the client 🤔

[Barbosik]

I mean the client

[m-byte918]

Barbosik, you're a saint!

[agarian-2]

I dare Barbosik to re-create diep.io, agar.io is dead. This is the current "best" diep.io private server: https://github.com/nepphhh/arrasio Also hosted at http://arras.surge.sh/