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WIP Minecraft client
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ERLC=/usr/local/bin/erlc | |
ERLCFLAGS=-o | |
SRCDIR=. | |
BEAMDIR=./ebin | |
compile: | |
$(ERLC) $(ERLCFLAGS) $(BEAMDIR) $(SRCDIR)/*.erl ; | |
run: compile | |
erl -pa ./ebin/ -boot start_sasl -s minecraft_server | |
server_download: | |
@mkdir -p server; cd server; test -f minecraft_server.jar || curl -O "https://s3.amazonaws.com/MinecraftDownload/launcher/minecraft_server.jar" | |
server: server_download | |
@cd server; java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui |
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-module(minecraft). | |
-compile(export_all). | |
-define(KEEPALIVE, 16#00). | |
-define(LOGIN, 16#01). | |
-define(HANDSHAKE, 16#02). | |
-define(TIME_UPDATE, 16#04). | |
-define(KICK, 16#FF). | |
-define(HANDSHAKE_MESSAGE(Username), list_to_binary([<<?HANDSHAKE:8>>, string_to_unicode_binary(Username)])). | |
-define(KEEPALIVE_PATTERN, <<?KEEPALIVE:8, KeepAliveID:32/signed>>). | |
-define(HANDSHAKE_PATTERN, <<?HANDSHAKE:8, HashLen:16, Hash:HashLen/binary-unit:16>>). | |
-define(KICK_PATTERN, <<?KICK:8, Len:16, Reason:Len/binary-unit:16>>). | |
start(MinecraftHost) -> | |
application:start(inets), | |
application:start(crypto), | |
application:start(public_key), | |
application:start(ssl), | |
Pid = spawn(fun() -> connect(MinecraftHost) end), | |
register(minecraft_socket, Pid). | |
connect(MinecraftHost) -> | |
{ok,Socket} = gen_tcp:connect(MinecraftHost, 25565, [binary, {packet, 0}]), | |
loop(Socket, []). | |
loop(Socket, Listeners) -> | |
receive | |
{tcp,Socket,Bin} -> | |
case Bin of | |
?KEEPALIVE_PATTERN -> gen_tcp:send(Socket, <<?KEEPALIVE:8, KeepAliveID:32/signed>>); | |
?HANDSHAKE_PATTERN -> notify(Listeners, {handshake, utf16_binary_to_list(Hash)}); | |
?KICK_PATTERN -> notify(Listeners, {kick, utf16_binary_to_list(Reason)}) | |
end, | |
loop(Socket, Listeners); | |
{tcp_send,Packet} -> | |
gen_tcp:send(Socket,Packet), | |
loop(Socket, Listeners); | |
{tcp_listen, Listener} -> | |
loop(Socket, [Listener|Listeners]) | |
end. | |
notify([], _) -> []; | |
notify([Listener|Rest], Message) -> | |
Listener ! Message, | |
notify(Rest, Message). | |
login(User, Password) -> | |
case login_request(User, Password) of | |
{ok, {_, 200, _}, _, Body} -> | |
[_,_,_,_SessionID] = string:tokens(Body, ":") | |
end, | |
minecraft_socket ! {tcp_send, ?HANDSHAKE_MESSAGE(User)}. | |
login_request(User, Password) -> | |
httpc:request(post, | |
{"https://login.minecraft.net/", | |
[], | |
"application/x-www-form-urlencoded", | |
lists:flatten(io_lib:format("user=~s&password=~s&version=9999", [User, Password]))}, | |
[], []). | |
listen() -> | |
minecraft_socket ! {tcp_listen, self()}. | |
%% Utility functions | |
string_to_unicode_binary(Str) -> | |
StrLen = string:len(Str), | |
StrBin = unicode:characters_to_binary(Str, utf8, utf16), | |
<<StrLen:16/unsigned, StrBin/binary>>. | |
utf16_binary_to_list(Bin) -> | |
unicode:characters_to_list(Bin, utf16). |
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-module(minecraft_server). | |
-behaviour(gen_server). | |
-define(SERVER, ?MODULE). | |
-define(KEEPALIVE, 16#00). | |
-define(LOGIN, 16#01). | |
-define(HANDSHAKE, 16#02). | |
-define(TIME_UPDATE, 16#04). | |
-define(KICK, 16#FF). | |
-define(HANDSHAKE_MESSAGE(Username), list_to_binary([<<?HANDSHAKE:8>>, minecraft:string_to_unicode_binary(Username)])). | |
-define(KEEPALIVE_PATTERN, <<?KEEPALIVE:8, KeepAliveID:32/signed>>). | |
-define(HANDSHAKE_PATTERN, <<?HANDSHAKE:8, HashLen:16, Hash:HashLen/binary-unit:16>>). | |
-define(KICK_PATTERN, <<?KICK:8, Len:16, Reason:Len/binary-unit:16>>). | |
%% ------------------------------------------------------------------ | |
%% API Function Exports | |
%% ------------------------------------------------------------------ | |
-export([start_link/0]). | |
-export([start/0, connect/2, connect_local/0]). | |
%% ------------------------------------------------------------------ | |
%% gen_server Function Exports | |
%% ------------------------------------------------------------------ | |
-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]). | |
-record(state, { | |
socket, | |
session_id, | |
user, | |
listeners | |
}). | |
%% ------------------------------------------------------------------ | |
%% API Function Definitions | |
%% ------------------------------------------------------------------ | |
start_link() -> | |
application:start(inets), | |
application:start(crypto), | |
application:start(public_key), | |
application:start(ssl), | |
gen_server:start_link({local, ?SERVER}, ?MODULE, [], []). | |
start() -> | |
start_link(). | |
connect(IP, Port) -> | |
gen_server:call(?MODULE, {connect, IP, Port}), | |
case minecraft:login_request("user", "password") of | |
{ok, {{_, 200, _}, _, Body}} -> | |
[_,_,_,SessionID] = string:tokens(Body, ":") | |
end, | |
gen_server:cast(?MODULE, {handshake_user, "spanx75", SessionID}). | |
connect_local() -> | |
connect("127.0.0.1", 25565). | |
%% ------------------------------------------------------------------ | |
%% gen_server Function Definitions | |
%% ------------------------------------------------------------------ | |
init([]) -> | |
process_flag(trap_exit, true), | |
%%io:format("Connecting to ~s~n", [MinecraftHost]), | |
%%{ok, Socket} = gen_tcp:connect(MinecraftHost, 25565, [binary, {packet, 0}]), | |
%%o:format("Socket: ~p~n", [Socket]), | |
{ok, #state{listeners = []}}. | |
handle_call({connect, IP, Port}, _From, State) -> | |
case gen_tcp:connect(IP, Port, [binary, {active, once}]) of | |
{ok, Socket} -> | |
%gen_tcp:controlling_process(Socket, ?MODULE), | |
NewState = State#state{socket=Socket}, | |
io:format("Socket ar: ~p~n", [Socket]), | |
{reply, ok, NewState}; | |
{error, Reason} -> | |
{reply, {error, Reason}, State} | |
end; | |
handle_call(_Request, _From, State) -> | |
{noreply, ok, State}. | |
handle_cast({handshake_user, User, SessionID}, State) -> | |
gen_tcp:send(State#state.socket, ?HANDSHAKE_MESSAGE(User)), | |
{noreply, State#state{session_id = SessionID, user = User}}; | |
handle_cast(_Msg, State) -> | |
{noreply, State}. | |
handle_info({tcp, _, ?HANDSHAKE_PATTERN}, State = #state{session_id = SessionID, user = User}) -> | |
StringHash = minecraft:utf16_binary_to_list(Hash), | |
io:format("Handshake hash: ~p~n", [StringHash]), | |
case httpc:request(get, | |
{lists:flatten(io_lib:format("http://session.minecraft.net/game/joinserver.jsp?user=~s&sessionId=~s&serverId=~s", [User, SessionID, StringHash])), []}, [], []) of | |
{ok, {{_, 200, _}, _, Body}} -> | |
io:format("Body: ~p~n", [Body]) | |
end, | |
{noreply, State}; | |
handle_info(Info, State) -> | |
io:format("Received info: ~p~n", [Info]), | |
{noreply, State}. | |
terminate(_Reason, _State) -> | |
ok. | |
code_change(_OldVsn, State, _Extra) -> | |
{ok, State}. |
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