shurcool / ex0 Goto Github PK

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49.0 49.0 7.0 43.49 MB

Unfinished multiplayer tactical 2D shooter indie game.

Home Page: https://dmitri.shuralyov.com/projects/eX0/eX0-go-client/

License: MIT License

Go 14.84% Makefile 0.38% C 14.56% Shell 0.03% C++ 70.18% HTML 0.02%

2d game go

ex0's People

Stargazers

Watchers

Forkers

glycerine lepulana think-jumper treeniap hokkaidobeard acgreek dolanor-galaxy

ex0's Issues

Dead blog link in README

I'd like to know how to make my networked game smooth as butter ;)

https://shurcool.wordpress.com/2011/07/25/how-to-make-your-networked-game-smooth-as-butter/

Panic possible in server.processUDPPacket for packet.ClientCommand case.

Here's a panic that happened, causing the server to crash.

...
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
12411.588: Pl#0 ("Unnamed Player") joined team team Red at logic time 167.77/168 [server].
tcp conn ended with: conn prob
panic: runtime error: index out of range

goroutine 118 [running]:
main.(*server).processUDPPacket(0xc420074280, 0x84eba0, 0xc42040e2c0, 0xc4203ea3f0, 0x0, 0xc4203ea3f0, 0x0, 0x0)
	/home/dmitri/go/src/github.com/shurcooL/eX0/eX0-go/server.go:296 +0xbb7
main.(*server).handleUDP(0xc420074280, 0xc4203ea3f0)
	/home/dmitri/go/src/github.com/shurcooL/eX0/eX0-go/server.go:214 +0xbb
created by main.(*server).listenAndHandleTCPWebSocket.func1
	/home/dmitri/go/src/github.com/shurcooL/eX0/eX0-go/server.go:165 +0x13e

It was on this line:

eX0/eX0-go/server.go

Line 296 in 9c721ba

lastState := s.logic.playersState[c.PlayerID].LatestAuthed()

Needs investigation and fix.

(A guess is that the client disconnected at a bad time, just before the UDP packet arrived, and the c.PlayerID might've already been removed from s.logic.playersState.)

Here's the full log in case more context is needed.

Full Log

Started server.
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
8.671: Pl#0 ("Unnamed Player") joined team team Red at logic time 173.42/174 [server].
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
6698.009: Pl#0 ("Unnamed Player") joined team team Red at logic time 72.18/73 [server].
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
7164.806: Pl#1 ("Unnamed Player") joined team team Red at logic time 192.12/193 [server].
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
7167.124: Pl#0 ("Unnamed Player") joined team team Red at logic time 238.49/239 [server].
udp conn ended with: conn prob
tcp conn ended with: conn prob
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
7248.113: Pl#0 ("Unnamed Player") joined team team Red at logic time 66.27/67 [server].
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
7248.224: Pl#1 ("Unnamed Player") joined team team Red at logic time 68.49/69 [server].
udp conn ended with: conn prob
tcp conn ended with: conn prob
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
8200.226: Pl#0 ("Unnamed Player") joined team team Red at logic time 164.51/165 [server].
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
8821.455: Pl#0 ("Unnamed Player") joined team team Red at logic time 45.11/46 [server].
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
10402.472: Pl#0 ("Unnamed Player") joined team team Red at logic time 177.43/178 [server].
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
10972.247: Pl#0 ("Unnamed Player") joined team team Red at logic time 52.94/53 [server].
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
12148.710: Pl#0 ("Unnamed Player") joined team team Red at logic time 30.21/31 [server].
udp conn ended with: conn prob
tcp conn ended with: conn prob
(packet.JoinServerRequest)(packet.JoinServerRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(26),
		Type:   (packet.Type)(1),
	}),
	Version: (uint16)(1),
	Passphrase: ([16]uint8)([16]uint8{
		(uint8)(115),
		(uint8)(111),
		(uint8)(109),
		(uint8)(101),
		(uint8)(114),
		(uint8)(97),
		(uint8)(110),
		(uint8)(100),
		(uint8)(111),
		(uint8)(109),
		(uint8)(112),
		(uint8)(97),
		(uint8)(115),
		(uint8)(115),
		(uint8)(48),
		(uint8)(49),
	}),
	Signature: (uint64)(123),
})
(packet.Handshake)(packet.Handshake{
	UDPHeader: (packet.UDPHeader)(packet.UDPHeader{
		Type: (packet.Type)(100),
	}),
	Signature: (uint64)(123),
})
(packet.LocalPlayerInfo)(packet.LocalPlayerInfo{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(17),
		Type:   (packet.Type)(30),
	}),
	NameLength: (uint8)(14),
	Name: ([]uint8)([]uint8{
		(uint8)(85),
		(uint8)(110),
		(uint8)(110),
		(uint8)(97),
		(uint8)(109),
		(uint8)(101),
		(uint8)(100),
		(uint8)(32),
		(uint8)(80),
		(uint8)(108),
		(uint8)(97),
		(uint8)(121),
		(uint8)(101),
		(uint8)(114),
	}),
	CommandRate: (uint8)(20),
	UpdateRate:  (uint8)(20),
})
(packet.EnteredGameNotification)(packet.EnteredGameNotification{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(0),
		Type:   (packet.Type)(7),
	}),
})
(packet.JoinTeamRequest)(packet.JoinTeamRequest{
	TCPHeader: (packet.TCPHeader)(packet.TCPHeader{
		Length: (uint16)(1),
		Type:   (packet.Type)(27),
	}),
	PlayerNumber: (*uint8)(nil),
	Team:         (packet.Team)(0),
})
12411.588: Pl#0 ("Unnamed Player") joined team team Red at logic time 167.77/168 [server].
tcp conn ended with: conn prob
panic: runtime error: index out of range

goroutine 118 [running]:
main.(*server).processUDPPacket(0xc420074280, 0x84eba0, 0xc42040e2c0, 0xc4203ea3f0, 0x0, 0xc4203ea3f0, 0x0, 0x0)
	/home/dmitri/go/src/github.com/shurcooL/eX0/eX0-go/server.go:296 +0xbb7
main.(*server).handleUDP(0xc420074280, 0xc4203ea3f0)
	/home/dmitri/go/src/github.com/shurcooL/eX0/eX0-go/server.go:214 +0xbb
created by main.(*server).listenAndHandleTCPWebSocket.func1
	/home/dmitri/go/src/github.com/shurcooL/eX0/eX0-go/server.go:165 +0x13e

eX0-go/net.go: sendUDPPacketBytes: Investigate/confirm possible misuse of Read method.

@@ -94,6 +94,8 @@ func sendUDPPacketBytes(c *Connection, b []byte) error {
 func receiveUDPPacket(c *Connection) ([]byte, packet.UDPHeader, error) {
    var b [packet.MAX_UDP_SIZE]byte
    n, err := c.udp.Read(b[:])
+   // TODO: Use io.ReadFull or check b[n:] here? But it is UDP, so... Figure it out.
+   //       Maybe it's fine because it's Conn.Read, not io.Read?
    if err != nil {
        return nil, packet.UDPHeader{}, err
    }

Originally reported/found by @dominikh.

License?

Seen your comment on the 2d lightning HN article. This code is not really open source yet, though. You might consider putting a license here.

My suggestion is Apache or MIT license if you don't mind what others do with it, and GPLv3+ if you try to make others open their changes to your code as well.

Show some mistakes when I build the Project

Hi，I'm new in golang and learning you project，it's pretty interesting，but when I build you source code in project , it's show some mistakes such as like that:

# command-line-arguments
.\main.go:18: undefined: server
.\main.go:19: undefined: client
.\main.go:20: undefined: view
.\main.go:32: undefined: newClientNetwork
.\main.go:41: undefined: startClient
.\main.go:44: undefined: startServer
too many errors

I'm skilled in Unity'C# but not golang，Isn't I do something wrong？
My golang's version is 1.7
I'm looking forward to your reply.

How to get browser version up and running?

I saw the r/golang post about this project—thought this was super cool!

I was able to get the normal Go server/clients working just fine, however I'm brand new to GopherJS and was wondering how it is that the JS is meant to be generated and then run?

Potential WebGL issue accessing out of bound arrays.

Seeing this error 18 times, in Safari only (not seeing it in Firefox). Not sure if legitimate issue or something else, needs investigation.

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