commit f8777ad035d78c7941aab7ee9b38066cc94d4045 Author: 1e99 <1e99@1e99.eu> Date: Sun Nov 17 13:45:23 2024 +0100 first commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..ffdc958 --- /dev/null +++ b/.gitignore @@ -0,0 +1,4 @@ +.gradle +.idea +build +client-fabric/run diff --git a/LICENSE.md b/LICENSE.md new file mode 100644 index 0000000..63ca2d0 --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,347 @@ +Mozilla Public License Version 2.0 +================================== + +### 1. Definitions + +**1.1. “Contributor”** +means each individual or legal entity that creates, contributes to +the creation of, or owns Covered Software. + +**1.2. “Contributor Version”** +means the combination of the Contributions of others (if any) used +by a Contributor and that particular Contributor's Contribution. + +**1.3. “Contribution”** +means Covered Software of a particular Contributor. + +**1.4. “Covered Software”** +means Source Code Form to which the initial Contributor has attached +the notice in Exhibit A, the Executable Form of such Source Code +Form, and Modifications of such Source Code Form, in each case +including portions thereof. + +**1.5. “Incompatible With Secondary Licenses”** +means + +* **(a)** that the initial Contributor has attached the notice described + in Exhibit B to the Covered Software; or +* **(b)** that the Covered Software was made available under the terms of + version 1.1 or earlier of the License, but not also under the + terms of a Secondary License. + +**1.6. “Executable Form”** +means any form of the work other than Source Code Form. + +**1.7. “Larger Work”** +means a work that combines Covered Software with other material, in +a separate file or files, that is not Covered Software. + +**1.8. “License”** +means this document. + +**1.9. “Licensable”** +means having the right to grant, to the maximum extent possible, +whether at the time of the initial grant or subsequently, any and +all of the rights conveyed by this License. + +**1.10. “Modifications”** +means any of the following: + +* **(a)** any file in Source Code Form that results from an addition to, + deletion from, or modification of the contents of Covered + Software; or +* **(b)** any new file in Source Code Form that contains any Covered + Software. + +**1.11. “Patent Claims” of a Contributor** +means any patent claim(s), including without limitation, method, +process, and apparatus claims, in any patent Licensable by such +Contributor that would be infringed, but for the grant of the +License, by the making, using, selling, offering for sale, having +made, import, or transfer of either its Contributions or its +Contributor Version. + +**1.12. “Secondary License”** +means either the GNU General Public License, Version 2.0, the GNU +Lesser General Public License, Version 2.1, the GNU Affero General +Public License, Version 3.0, or any later versions of those +licenses. + +**1.13. “Source Code Form”** +means the form of the work preferred for making modifications. + +**1.14. “You” (or “Your”)** +means an individual or a legal entity exercising rights under this +License. For legal entities, “You” includes any entity that +controls, is controlled by, or is under common control with You. For +purposes of this definition, “control” means **(a)** the power, direct +or indirect, to cause the direction or management of such entity, +whether by contract or otherwise, or **(b)** ownership of more than +fifty percent (50%) of the outstanding shares or beneficial +ownership of such entity. + +### 2. License Grants and Conditions + +#### 2.1. Grants + +Each Contributor hereby grants You a world-wide, royalty-free, +non-exclusive license: + +* **(a)** under intellectual property rights (other than patent or trademark) + Licensable by such Contributor to use, reproduce, make available, + modify, display, perform, distribute, and otherwise exploit its + Contributions, either on an unmodified basis, with Modifications, or + as part of a Larger Work; and +* **(b)** under Patent Claims of such Contributor to make, use, sell, offer + for sale, have made, import, and otherwise transfer either its + Contributions or its Contributor Version. + +#### 2.2. Effective Date + +The licenses granted in Section 2.1 with respect to any Contribution +become effective for each Contribution on the date the Contributor first +distributes such Contribution. + +#### 2.3. Limitations on Grant Scope + +The licenses granted in this Section 2 are the only rights granted under +this License. No additional rights or licenses will be implied from the +distribution or licensing of Covered Software under this License. +Notwithstanding Section 2.1(b) above, no patent license is granted by a +Contributor: + +* **(a)** for any code that a Contributor has removed from Covered Software; + or +* **(b)** for infringements caused by: **(i)** Your and any other third party's + modifications of Covered Software, or **(ii)** the combination of its + Contributions with other software (except as part of its Contributor + Version); or +* **(c)** under Patent Claims infringed by Covered Software in the absence of + its Contributions. + +This License does not grant any rights in the trademarks, service marks, +or logos of any Contributor (except as may be necessary to comply with +the notice requirements in Section 3.4). + +#### 2.4. Subsequent Licenses + +No Contributor makes additional grants as a result of Your choice to +distribute the Covered Software under a subsequent version of this +License (see Section 10.2) or under the terms of a Secondary License (if +permitted under the terms of Section 3.3). + +#### 2.5. Representation + +Each Contributor represents that the Contributor believes its +Contributions are its original creation(s) or it has sufficient rights +to grant the rights to its Contributions conveyed by this License. + +#### 2.6. Fair Use + +This License is not intended to limit any rights You have under +applicable copyright doctrines of fair use, fair dealing, or other +equivalents. + +#### 2.7. Conditions + +Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted +in Section 2.1. + +### 3. Responsibilities + +#### 3.1. Distribution of Source Form + +All distribution of Covered Software in Source Code Form, including any +Modifications that You create or to which You contribute, must be under +the terms of this License. You must inform recipients that the Source +Code Form of the Covered Software is governed by the terms of this +License, and how they can obtain a copy of this License. You may not +attempt to alter or restrict the recipients' rights in the Source Code +Form. + +#### 3.2. Distribution of Executable Form + +If You distribute Covered Software in Executable Form then: + +* **(a)** such Covered Software must also be made available in Source Code + Form, as described in Section 3.1, and You must inform recipients of + the Executable Form how they can obtain a copy of such Source Code + Form by reasonable means in a timely manner, at a charge no more + than the cost of distribution to the recipient; and + +* **(b)** You may distribute such Executable Form under the terms of this + License, or sublicense it under different terms, provided that the + license for the Executable Form does not attempt to limit or alter + the recipients' rights in the Source Code Form under this License. + +#### 3.3. Distribution of a Larger Work + +You may create and distribute a Larger Work under terms of Your choice, +provided that You also comply with the requirements of this License for +the Covered Software. If the Larger Work is a combination of Covered +Software with a work governed by one or more Secondary Licenses, and the +Covered Software is not Incompatible With Secondary Licenses, this +License permits You to additionally distribute such Covered Software +under the terms of such Secondary License(s), so that the recipient of +the Larger Work may, at their option, further distribute the Covered +Software under the terms of either this License or such Secondary +License(s). + +#### 3.4. Notices + +You may not remove or alter the substance of any license notices +(including copyright notices, patent notices, disclaimers of warranty, +or limitations of liability) contained within the Source Code Form of +the Covered Software, except that You may alter any license notices to +the extent required to remedy known factual inaccuracies. + +#### 3.5. Application of Additional Terms + +You may choose to offer, and to charge a fee for, warranty, support, +indemnity or liability obligations to one or more recipients of Covered +Software. However, You may do so only on Your own behalf, and not on +behalf of any Contributor. You must make it absolutely clear that any +such warranty, support, indemnity, or liability obligation is offered by +You alone, and You hereby agree to indemnify every Contributor for any +liability incurred by such Contributor as a result of warranty, support, +indemnity or liability terms You offer. You may include additional +disclaimers of warranty and limitations of liability specific to any +jurisdiction. + +### 4. Inability to Comply Due to Statute or Regulation + +If it is impossible for You to comply with any of the terms of this +License with respect to some or all of the Covered Software due to +statute, judicial order, or regulation then You must: **(a)** comply with +the terms of this License to the maximum extent possible; and **(b)** +describe the limitations and the code they affect. Such description must +be placed in a text file included with all distributions of the Covered +Software under this License. Except to the extent prohibited by statute +or regulation, such description must be sufficiently detailed for a +recipient of ordinary skill to be able to understand it. + +### 5. Termination + +**5.1.** The rights granted under this License will terminate automatically +if You fail to comply with any of its terms. However, if You become +compliant, then the rights granted under this License from a particular +Contributor are reinstated **(a)** provisionally, unless and until such +Contributor explicitly and finally terminates Your grants, and **(b)** on an +ongoing basis, if such Contributor fails to notify You of the +non-compliance by some reasonable means prior to 60 days after You have +come back into compliance. Moreover, Your grants from a particular +Contributor are reinstated on an ongoing basis if such Contributor +notifies You of the non-compliance by some reasonable means, this is the +first time You have received notice of non-compliance with this License +from such Contributor, and You become compliant prior to 30 days after +Your receipt of the notice. + +**5.2.** If You initiate litigation against any entity by asserting a patent +infringement claim (excluding declaratory judgment actions, +counter-claims, and cross-claims) alleging that a Contributor Version +directly or indirectly infringes any patent, then the rights granted to +You by any and all Contributors for the Covered Software under Section +2.1 of this License shall terminate. + +**5.3.** In the event of termination under Sections 5.1 or 5.2 above, all +end user license agreements (excluding distributors and resellers) which +have been validly granted by You or Your distributors under this License +prior to termination shall survive termination. + +### 6. Disclaimer of Warranty + +> Covered Software is provided under this License on an “as is” +> basis, without warranty of any kind, either expressed, implied, or +> statutory, including, without limitation, warranties that the +> Covered Software is free of defects, merchantable, fit for a +> particular purpose or non-infringing. The entire risk as to the +> quality and performance of the Covered Software is with You. +> Should any Covered Software prove defective in any respect, You +> (not any Contributor) assume the cost of any necessary servicing, +> repair, or correction. This disclaimer of warranty constitutes an +> essential part of this License. No use of any Covered Software is +> authorized under this License except under this disclaimer. + +### 7. Limitation of Liability + +> Under no circumstances and under no legal theory, whether tort +> (including negligence), contract, or otherwise, shall any +> Contributor, or anyone who distributes Covered Software as +> permitted above, be liable to You for any direct, indirect, +> special, incidental, or consequential damages of any character +> including, without limitation, damages for lost profits, loss of +> goodwill, work stoppage, computer failure or malfunction, or any +> and all other commercial damages or losses, even if such party +> shall have been informed of the possibility of such damages. This +> limitation of liability shall not apply to liability for death or +> personal injury resulting from such party's negligence to the +> extent applicable law prohibits such limitation. Some +> jurisdictions do not allow the exclusion or limitation of +> incidental or consequential damages, so this exclusion and +> limitation may not apply to You. + +### 8. Litigation + +Any litigation relating to this License may be brought only in the +courts of a jurisdiction where the defendant maintains its principal +place of business and such litigation shall be governed by laws of that +jurisdiction, without reference to its conflict-of-law provisions. +Nothing in this Section shall prevent a party's ability to bring +cross-claims or counter-claims. + +### 9. Miscellaneous + +This License represents the complete agreement concerning the subject +matter hereof. If any provision of this License is held to be +unenforceable, such provision shall be reformed only to the extent +necessary to make it enforceable. Any law or regulation which provides +that the language of a contract shall be construed against the drafter +shall not be used to construe this License against a Contributor. + +### 10. Versions of the License + +#### 10.1. New Versions + +Mozilla Foundation is the license steward. Except as provided in Section +10.3, no one other than the license steward has the right to modify or +publish new versions of this License. Each version will be given a +distinguishing version number. + +#### 10.2. Effect of New Versions + +You may distribute the Covered Software under the terms of the version +of the License under which You originally received the Covered Software, +or under the terms of any subsequent version published by the license +steward. + +#### 10.3. Modified Versions + +If you create software not governed by this License, and you want to +create a new license for such software, you may create and use a +modified version of this License if you rename the license and remove +any references to the name of the license steward (except to note that +such modified license differs from this License). + +#### 10.4. Distributing Source Code Form that is Incompatible With Secondary Licenses + +If You choose to distribute Source Code Form that is Incompatible With +Secondary Licenses under the terms of this version of the License, the +notice described in Exhibit B of this License must be attached. + +## Exhibit A - Source Code Form License Notice + + This Source Code Form is subject to the terms of the Mozilla Public + License, v. 2.0. If a copy of the MPL was not distributed with this + file, You can obtain one at http://mozilla.org/MPL/2.0/. + +If it is not possible or desirable to put the notice in a particular +file, then You may include the notice in a location (such as a LICENSE +file in a relevant directory) where a recipient would be likely to look +for such a notice. + +You may add additional accurate notices of copyright ownership. + +## Exhibit B - “Incompatible With Secondary Licenses” Notice + + This Source Code Form is "Incompatible With Secondary Licenses", as + defined by the Mozilla Public License, v. 2.0. diff --git a/build.gradle b/build.gradle new file mode 100644 index 0000000..075ba3d --- /dev/null +++ b/build.gradle @@ -0,0 +1,3 @@ +plugins { + id 'java' +} diff --git a/client-fabric/build.gradle b/client-fabric/build.gradle new file mode 100644 index 0000000..9eb9a19 --- /dev/null +++ b/client-fabric/build.gradle @@ -0,0 +1,45 @@ +plugins { + id 'fabric-loom' version '1.8-SNAPSHOT' +} + +repositories { + mavenCentral() +} + +dependencies { + minecraft "com.mojang:minecraft:${project.minecraft_version}" + mappings "net.fabricmc:yarn:${project.yarn_mappings}:v2" + modImplementation "net.fabricmc:fabric-loader:${project.loader_version}" + + modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}" + + implementation project(':common') +} + +sourceSets { + main.java.srcDirs = ['src'] + main.resources.srcDirs = ['resources'] +} + +processResources { + inputs.property "version", version + + filesMatching("fabric.mod.json") { + expand "version": version + } +} + +tasks.withType(JavaCompile).configureEach { + it.options.release = 21 +} + +java { + sourceCompatibility = JavaVersion.VERSION_21 + targetCompatibility = JavaVersion.VERSION_21 +} + +jar { + from("LICENSE") { + rename { "${it}_${project.base.archivesName.get()}" } + } +} diff --git a/client-fabric/gradle.properties b/client-fabric/gradle.properties new file mode 100644 index 0000000..33a0d45 --- /dev/null +++ b/client-fabric/gradle.properties @@ -0,0 +1,7 @@ +org.gradle.jvmargs=-Xmx1G +org.gradle.parallel=true +# https://fabricmc.net/develop +minecraft_version=1.21.3 +yarn_mappings=1.21.3+build.2 +loader_version=0.16.9 +fabric_version=0.108.0+1.21.3 diff --git a/client-fabric/resources/fabric.mod.json b/client-fabric/resources/fabric.mod.json new file mode 100644 index 0000000..a063aaa --- /dev/null +++ b/client-fabric/resources/fabric.mod.json @@ -0,0 +1,33 @@ +{ + "schemaVersion": 1, + "id": "svc", + "version": "${version}", + "name": "Simpler Voice Chat", + "description": "Simpler voice chat for our favorite block game", + "authors": [ + "1e99" + ], + "contact": { + "sources": "https://git.1e99.eu/1e99/simplervoicechat" + }, + "license": "MPL-2.0", + "icon": "assets/svc/icon.png", + "environment": "*", + "entrypoints": { + "client": [ + "eu.e99.svc.client.fabric.FabricSimplerVoiceChat" + ] + }, + "mixins": [ + { + "config": "svc.mixins.json", + "environment": "client" + } + ], + "depends": { + "fabricloader": ">=0.16.7", + "minecraft": "~1.21.3", + "java": ">=21", + "fabric-api": "*" + } +} diff --git a/client-fabric/resources/svc.mixins.json b/client-fabric/resources/svc.mixins.json new file mode 100644 index 0000000..7b7c489 --- /dev/null +++ b/client-fabric/resources/svc.mixins.json @@ -0,0 +1,10 @@ +{ + "required": true, + "package": "eu.e99.svc.client.fabric.mixin", + "compatibilityLevel": "JAVA_21", + "mixins": [ + ], + "injectors": { + "defaultRequire": 1 + } +} diff --git a/client-fabric/src/eu/e99/svc/client/fabric/FabricSimplerVoiceChat.java b/client-fabric/src/eu/e99/svc/client/fabric/FabricSimplerVoiceChat.java new file mode 100644 index 0000000..088dd7b --- /dev/null +++ b/client-fabric/src/eu/e99/svc/client/fabric/FabricSimplerVoiceChat.java @@ -0,0 +1,18 @@ +package eu.e99.svc.client.fabric; + +import net.fabricmc.api.ClientModInitializer; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class FabricSimplerVoiceChat implements ClientModInitializer { + + public static final String NAMESPACE = "svc"; + public static final Logger LOGGER = LoggerFactory.getLogger(NAMESPACE); + + @Override + public void onInitializeClient() { + LOGGER.info("Simpler Voice Chat Running"); + + + } +} diff --git a/common/build.gradle b/common/build.gradle new file mode 100644 index 0000000..0e19848 --- /dev/null +++ b/common/build.gradle @@ -0,0 +1,16 @@ +plugins { + id 'java' +} + +repositories { + mavenCentral() +} + +dependencies { + implementation 'com.google.code.gson:gson:2.11.0' +} + +sourceSets { + main.java.srcDirs = ['src'] + main.resources.srcDirs = ['resources'] +} diff --git a/common/src/eu/e99/svc/AllTrustManager.java b/common/src/eu/e99/svc/AllTrustManager.java new file mode 100644 index 0000000..fd52591 --- /dev/null +++ b/common/src/eu/e99/svc/AllTrustManager.java @@ -0,0 +1,20 @@ +package eu.e99.svc; + +import javax.net.ssl.X509TrustManager; +import java.security.cert.X509Certificate; + +public class AllTrustManager implements X509TrustManager { + + @Override + public void checkClientTrusted(X509Certificate[] chain, String authType) { + } + + @Override + public void checkServerTrusted(X509Certificate[] chain, String authType) { + } + + @Override + public X509Certificate[] getAcceptedIssuers() { + return new X509Certificate[0]; + } +} diff --git a/common/src/eu/e99/svc/Connection.java b/common/src/eu/e99/svc/Connection.java new file mode 100644 index 0000000..f0f8daf --- /dev/null +++ b/common/src/eu/e99/svc/Connection.java @@ -0,0 +1,41 @@ +package eu.e99.svc; + +import eu.e99.svc.io.BinaryMessage; +import eu.e99.svc.io.Reader; +import eu.e99.svc.io.Writer; +import eu.e99.svc.packet.DisconnectPacket; + +import java.io.IOException; +import java.net.Socket; + +public class Connection { + + private final Socket socket; + private final Reader reader; + private final Writer writer; + + public Connection(Socket socket) throws IOException { + this.socket = socket; + this.reader = new Reader(this.socket.getInputStream()); + this.writer = new Writer(this.socket.getOutputStream()); + } + + public void writePacket(BinaryMessage packet) throws IOException { + synchronized (this.socket) { + SimplerVoiceChat.PACKETS.writeMessage(packet, this.writer); + } + } + + public BinaryMessage readPacket() throws IOException { + synchronized (this.socket) { + return SimplerVoiceChat.PACKETS.readMessage(this.reader); + } + } + + public void disconnect(String reason) throws IOException { + DisconnectPacket disconnect = new DisconnectPacket(); + disconnect.reason = reason; + this.writePacket(disconnect); + this.socket.close(); + } +} diff --git a/common/src/eu/e99/svc/SimplerVoiceChat.java b/common/src/eu/e99/svc/SimplerVoiceChat.java new file mode 100644 index 0000000..c670ebd --- /dev/null +++ b/common/src/eu/e99/svc/SimplerVoiceChat.java @@ -0,0 +1,100 @@ +package eu.e99.svc; + +import eu.e99.svc.io.BinaryMessage; +import eu.e99.svc.io.MessageRegistry; +import eu.e99.svc.packet.*; + +import javax.net.ssl.SSLContext; +import javax.net.ssl.SSLSocketFactory; +import javax.net.ssl.TrustManager; +import java.io.IOException; +import java.net.InetSocketAddress; +import java.net.Socket; +import java.security.KeyManagementException; +import java.security.NoSuchAlgorithmException; +import java.security.SecureRandom; + +public class SimplerVoiceChat { + + public static final int PROTOCOL_VERSION = 0; + + public static final MessageRegistry PACKETS = new MessageRegistry(); + public static final MessageRegistry MESSAGES = new MessageRegistry(); + + static { + PACKETS.registerMessage(0, ClientHelloPacket::new); + // TODO: Keep alive? + PACKETS.registerMessage(2, AuthRequestPacket::new); + PACKETS.registerMessage(3, AuthResponsePacket::new); + PACKETS.registerMessage(4, AuthSuccessPacket::new); + PACKETS.registerMessage(100, MessagePacket::new); + PACKETS.registerMessage(255, DisconnectPacket::new); + } + + + public static void main(String[] args) throws NoSuchAlgorithmException, KeyManagementException { + TrustManager[] trustManagers = new TrustManager[]{ + new AllTrustManager(), + }; + + SSLContext sslContext = SSLContext.getInstance("TLS"); + sslContext.init(null, trustManagers, new SecureRandom()); + + SSLSocketFactory socketFactory = sslContext.getSocketFactory(); + + SimplerVoiceChat voiceChat = new SimplerVoiceChat("localhost", 6969, socketFactory); + voiceChat.start(); + } + + private final String host; + private final int port; + private final SSLSocketFactory socketFactory; + + public SimplerVoiceChat(String host, int port, SSLSocketFactory socketFactory) { + this.host = host; + this.port = port; + this.socketFactory = socketFactory; + } + + public void start() { + // Connect and auth + + try (Socket socket = this.socketFactory.createSocket()) { + socket.connect(new InetSocketAddress(this.host, this.port)); + Connection conn = new Connection(socket); + + this.handleHandshake(conn); + } catch (IOException e) { + System.out.printf("Failed to connect.%n"); + e.printStackTrace(System.out); + } + } + + private void handleHandshake(Connection conn) throws IOException { + ClientHelloPacket clientHello = new ClientHelloPacket(); + clientHello.version = PROTOCOL_VERSION; + conn.writePacket(clientHello); + + while (true) { + BinaryMessage packet = conn.readPacket(); + + switch (packet) { + case AuthRequestPacket authRequest -> { + System.out.printf("Joining fake server to authenticate.%n"); + + AuthResponsePacket authResponse = new AuthResponsePacket(); + authResponse.username = "Test"; + conn.writePacket(authResponse); + } + case AuthSuccessPacket authComplete -> { + System.out.printf("Successfully authenticated.%n"); + return; + } + default -> { + System.out.printf("Got unexpected packet.%n"); + } + } + } + + } +} diff --git a/common/src/eu/e99/svc/auth/MojangAPI.java b/common/src/eu/e99/svc/auth/MojangAPI.java new file mode 100644 index 0000000..9771b47 --- /dev/null +++ b/common/src/eu/e99/svc/auth/MojangAPI.java @@ -0,0 +1,42 @@ +package eu.e99.svc.auth; + +import com.google.gson.JsonObject; +import com.google.gson.JsonParser; + +import java.io.IOException; +import java.net.URI; +import java.net.http.HttpClient; +import java.net.http.HttpRequest; +import java.net.http.HttpResponse; +import java.util.UUID; + +// https://wiki.vg/Protocol_Encryption +public class MojangAPI { + + public static PlayerProfile hasJoined(String username, String serverId) throws IOException, InterruptedException { + try (HttpClient client = HttpClient.newHttpClient()) { + String loc = String.format("https://sessionserver.mojang.com/session/minecraft/hasJoined?username=%s&serverId=%s", username, serverId); + URI uri = URI.create(loc); + + HttpRequest req = HttpRequest.newBuilder() + .uri(uri) + .GET() + .build(); + + HttpResponse res = client.send(req, HttpResponse.BodyHandlers.ofString()); + if (res.statusCode() == 204) { + return null; + } + + JsonObject object = JsonParser + .parseString(res.body()) + .getAsJsonObject(); + + String name = object.get("name").getAsString(); + String rawUuid = object.get("id").getAsString(); + UUID uuid = UUID.fromString(rawUuid.replaceFirst("(\\w{8})(\\w{4})(\\w{4})(\\w{4})(\\w{12})", "$1-$2-$3-$4-$5")); + + return new PlayerProfile(name, uuid); + } + } +} diff --git a/common/src/eu/e99/svc/auth/PlayerProfile.java b/common/src/eu/e99/svc/auth/PlayerProfile.java new file mode 100644 index 0000000..4544355 --- /dev/null +++ b/common/src/eu/e99/svc/auth/PlayerProfile.java @@ -0,0 +1,11 @@ +package eu.e99.svc.auth; + +import java.util.UUID; + +public record PlayerProfile( + String username, + UUID uuid +) { + + +} diff --git a/common/src/eu/e99/svc/io/BinaryMessage.java b/common/src/eu/e99/svc/io/BinaryMessage.java new file mode 100644 index 0000000..acba43e --- /dev/null +++ b/common/src/eu/e99/svc/io/BinaryMessage.java @@ -0,0 +1,10 @@ +package eu.e99.svc.io; + +import java.io.IOException; + +public interface BinaryMessage { + + void read(Reader reader) throws IOException; + + void write(Writer writer) throws IOException; +} diff --git a/common/src/eu/e99/svc/io/MessageRegistry.java b/common/src/eu/e99/svc/io/MessageRegistry.java new file mode 100644 index 0000000..b7bd42d --- /dev/null +++ b/common/src/eu/e99/svc/io/MessageRegistry.java @@ -0,0 +1,50 @@ +package eu.e99.svc.io; + +import eu.e99.svc.packet.*; + +import java.io.IOException; +import java.util.HashMap; +import java.util.Map; +import java.util.function.Supplier; + +public class MessageRegistry { + + private final Map> messagesById; + private final Map, Integer> messagesByClass; + + public MessageRegistry() { + this.messagesById = new HashMap<>(); + this.messagesByClass = new HashMap<>(); + } + + public BinaryMessage readMessage(Reader reader) throws IOException { + int id = reader.readInt(); + Supplier supplier = this.messagesById.get(id);; + if (supplier == null) { + throw new RuntimeException("Failed to find message with id " + id); + } + + BinaryMessage msg = supplier.get(); + msg.read(reader); + return msg; + } + + public void writeMessage(BinaryMessage msg, Writer writer) throws IOException { + Class clazz = msg.getClass(); + Integer id = this.messagesByClass.get(clazz); + if (id == null) { + throw new IllegalArgumentException("Unknown message sent."); + } + + writer.writeInt(id); + msg.write(writer); + } + + public void registerMessage(int id, Supplier supplier) { + BinaryMessage msg = supplier.get(); + Class clazz = msg.getClass(); + + this.messagesById.put(id, supplier); + this.messagesByClass.put(clazz, id); + } +} diff --git a/common/src/eu/e99/svc/io/Reader.java b/common/src/eu/e99/svc/io/Reader.java new file mode 100644 index 0000000..ea154da --- /dev/null +++ b/common/src/eu/e99/svc/io/Reader.java @@ -0,0 +1,48 @@ +package eu.e99.svc.io; + +import java.io.DataInputStream; +import java.io.IOException; +import java.io.InputStream; +import java.nio.charset.StandardCharsets; +import java.util.UUID; + +public class Reader { + + private final DataInputStream in; + + public Reader(InputStream in) { + this.in = new DataInputStream(in); + } + + public int readInt() throws IOException { + return this.in.readInt(); + } + + public long readLong() throws IOException { + return this.in.readLong(); + } + + public boolean readBool() throws IOException { + return this.in.readBoolean(); + } + + public String readString() throws IOException { + byte[] bytes = this.readByteArray(); + return new String(bytes, StandardCharsets.UTF_8); + } + + public byte[] readByteArray() throws IOException { + int length = this.readInt(); + byte[] bytes = new byte[length]; + this.in.readFully(bytes); + + return bytes; + } + + public UUID readUUID() throws IOException { + long most = this.readLong(); + long least = this.readLong(); + + return new UUID(most, least); + } +} diff --git a/common/src/eu/e99/svc/io/Writer.java b/common/src/eu/e99/svc/io/Writer.java new file mode 100644 index 0000000..11692a4 --- /dev/null +++ b/common/src/eu/e99/svc/io/Writer.java @@ -0,0 +1,43 @@ +package eu.e99.svc.io; + +import java.io.DataOutputStream; +import java.io.IOException; +import java.io.OutputStream; +import java.nio.charset.StandardCharsets; +import java.util.UUID; + +public class Writer { + + private final DataOutputStream out; + + public Writer(OutputStream out) { + this.out = new DataOutputStream(out); + } + + public void writeInt(int i) throws IOException { + this.out.writeInt(i); + } + + public void writeLong(long l) throws IOException { + this.out.writeLong(l); + } + + public void writeBool(boolean bool) throws IOException { + this.out.writeBoolean(bool); + } + + public void writeString(String string) throws IOException { + byte[] bytes = string.getBytes(StandardCharsets.UTF_8); + this.writeByteArray(bytes); + } + + public void writeByteArray(byte[] bytes) throws IOException { + this.writeInt(bytes.length); + this.out.write(bytes); + } + + public void writeUUID(UUID uuid) throws IOException { + this.writeLong(uuid.getMostSignificantBits()); + this.writeLong(uuid.getLeastSignificantBits()); + } +} diff --git a/common/src/eu/e99/svc/packet/AuthRequestPacket.java b/common/src/eu/e99/svc/packet/AuthRequestPacket.java new file mode 100644 index 0000000..08249e6 --- /dev/null +++ b/common/src/eu/e99/svc/packet/AuthRequestPacket.java @@ -0,0 +1,22 @@ +package eu.e99.svc.packet; + +import eu.e99.svc.io.BinaryMessage; +import eu.e99.svc.io.Reader; +import eu.e99.svc.io.Writer; + +import java.io.IOException; + +public class AuthRequestPacket implements BinaryMessage { + + public String serverId; + + @Override + public void read(Reader reader) throws IOException { + this.serverId = reader.readString(); + } + + @Override + public void write(Writer writer) throws IOException { + writer.writeString(this.serverId); + } +} diff --git a/common/src/eu/e99/svc/packet/AuthResponsePacket.java b/common/src/eu/e99/svc/packet/AuthResponsePacket.java new file mode 100644 index 0000000..cb2a425 --- /dev/null +++ b/common/src/eu/e99/svc/packet/AuthResponsePacket.java @@ -0,0 +1,22 @@ +package eu.e99.svc.packet; + +import eu.e99.svc.io.BinaryMessage; +import eu.e99.svc.io.Reader; +import eu.e99.svc.io.Writer; + +import java.io.IOException; + +public class AuthResponsePacket implements BinaryMessage { + + public String username; + + @Override + public void read(Reader reader) throws IOException { + this.username = reader.readString(); + } + + @Override + public void write(Writer writer) throws IOException { + writer.writeString(this.username); + } +} diff --git a/common/src/eu/e99/svc/packet/AuthSuccessPacket.java b/common/src/eu/e99/svc/packet/AuthSuccessPacket.java new file mode 100644 index 0000000..b16940f --- /dev/null +++ b/common/src/eu/e99/svc/packet/AuthSuccessPacket.java @@ -0,0 +1,20 @@ +package eu.e99.svc.packet; + +import eu.e99.svc.io.BinaryMessage; +import eu.e99.svc.io.Reader; +import eu.e99.svc.io.Writer; + +import java.io.IOException; + +public class AuthSuccessPacket implements BinaryMessage { + + @Override + public void read(Reader reader) throws IOException { + + } + + @Override + public void write(Writer writer) throws IOException { + + } +} diff --git a/common/src/eu/e99/svc/packet/ClientHelloPacket.java b/common/src/eu/e99/svc/packet/ClientHelloPacket.java new file mode 100644 index 0000000..02eb23a --- /dev/null +++ b/common/src/eu/e99/svc/packet/ClientHelloPacket.java @@ -0,0 +1,22 @@ +package eu.e99.svc.packet; + +import eu.e99.svc.io.BinaryMessage; +import eu.e99.svc.io.Reader; +import eu.e99.svc.io.Writer; + +import java.io.IOException; + +public class ClientHelloPacket implements BinaryMessage { + + public int version; + + @Override + public void read(Reader reader) throws IOException { + this.version = reader.readInt(); + } + + @Override + public void write(Writer writer) throws IOException { + writer.writeInt(this.version); + } +} diff --git a/common/src/eu/e99/svc/packet/DisconnectPacket.java b/common/src/eu/e99/svc/packet/DisconnectPacket.java new file mode 100644 index 0000000..82590fd --- /dev/null +++ b/common/src/eu/e99/svc/packet/DisconnectPacket.java @@ -0,0 +1,22 @@ +package eu.e99.svc.packet; + +import eu.e99.svc.io.BinaryMessage; +import eu.e99.svc.io.Reader; +import eu.e99.svc.io.Writer; + +import java.io.IOException; + +public class DisconnectPacket implements BinaryMessage { + + public String reason; + + @Override + public void read(Reader reader) throws IOException { + this.reason = reader.readString(); + } + + @Override + public void write(Writer writer) throws IOException { + writer.writeString(this.reason); + } +} diff --git a/common/src/eu/e99/svc/packet/MessagePacket.java b/common/src/eu/e99/svc/packet/MessagePacket.java new file mode 100644 index 0000000..c08d1fe --- /dev/null +++ b/common/src/eu/e99/svc/packet/MessagePacket.java @@ -0,0 +1,26 @@ +package eu.e99.svc.packet; + +import eu.e99.svc.io.BinaryMessage; +import eu.e99.svc.io.Reader; +import eu.e99.svc.io.Writer; + +import java.io.IOException; +import java.util.UUID; + +public class MessagePacket implements BinaryMessage { + + public UUID player; + public byte[] payload; + + @Override + public void read(Reader reader) throws IOException { + this.player = reader.readUUID(); + this.payload = reader.readByteArray(); + } + + @Override + public void write(Writer writer) throws IOException { + writer.writeUUID(this.player); + writer.writeByteArray(this.payload); + } +} diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 0000000..955e786 Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 0000000..87e601d --- /dev/null +++ b/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1 @@ +distributionUrl=https\://services.gradle.org/distributions/gradle-8.11-bin.zip diff --git a/gradlew b/gradlew new file mode 100755 index 0000000..17a9170 --- /dev/null +++ b/gradlew @@ -0,0 +1,176 @@ +#!/usr/bin/env sh + +############################################################################## +## +## Gradle start up script for UN*X +## +############################################################################## + +# Attempt to set APP_HOME +# Resolve links: $0 may be a link +PRG="$0" +# Need this for relative symlinks. +while [ -h "$PRG" ] ; do + ls=`ls -ld "$PRG"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '/.*' > /dev/null; then + PRG="$link" + else + PRG=`dirname "$PRG"`"/$link" + fi +done +SAVED="`pwd`" +cd "`dirname \"$PRG\"`/" >/dev/null +APP_HOME="`pwd -P`" +cd "$SAVED" >/dev/null + +APP_NAME="Gradle" +APP_BASE_NAME=`basename "$0"` + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS="" + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD="maximum" + +warn () { + echo "$*" +} + +die () { + echo + echo "$*" + echo + exit 1 +} + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "`uname`" in + CYGWIN* ) + cygwin=true + ;; + Darwin* ) + darwin=true + ;; + MINGW* ) + msys=true + ;; + NONSTOP* ) + nonstop=true + ;; +esac + +CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar + +# Determine the Java command to use to start the JVM. +if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD="$JAVA_HOME/jre/sh/java" + else + JAVACMD="$JAVA_HOME/bin/java" + fi + if [ ! -x "$JAVACMD" ] ; then + die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD="java" + which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." +fi + +# Increase the maximum file descriptors if we can. +if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then + MAX_FD_LIMIT=`ulimit -H -n` + if [ $? -eq 0 ] ; then + if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then + MAX_FD="$MAX_FD_LIMIT" + fi + ulimit -n $MAX_FD + if [ $? -ne 0 ] ; then + warn "Could not set maximum file descriptor limit: $MAX_FD" + fi + else + warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" + fi +fi + +# For Darwin, add options to specify how the application appears in the dock +if $darwin; then + GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" +fi + +# For Cygwin, switch paths to Windows format before running java +if $cygwin ; then + APP_HOME=`cygpath --path --mixed "$APP_HOME"` + CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` + JAVACMD=`cygpath --unix "$JAVACMD"` + + # We build the pattern for arguments to be converted via cygpath + ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` + SEP="" + for dir in $ROOTDIRSRAW ; do + ROOTDIRS="$ROOTDIRS$SEP$dir" + SEP="|" + done + OURCYGPATTERN="(^($ROOTDIRS))" + # Add a user-defined pattern to the cygpath arguments + if [ "$GRADLE_CYGPATTERN" != "" ] ; then + OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" + fi + # Now convert the arguments - kludge to limit ourselves to /bin/sh + i=0 + for arg in "$@" ; do + CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` + CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option + + if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition + eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` + else + eval `echo args$i`="\"$arg\"" + fi + i=$((i+1)) + done + case $i in + (0) set -- ;; + (1) set -- "$args0" ;; + (2) set -- "$args0" "$args1" ;; + (3) set -- "$args0" "$args1" "$args2" ;; + (4) set -- "$args0" "$args1" "$args2" "$args3" ;; + (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; + (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; + (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; + (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; + (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; + esac +fi + +# Escape application args +save () { + for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done + echo " " +} +APP_ARGS=$(save "$@") + +# Collect all arguments for the java command, following the shell quoting and substitution rules +if $JAVACMD --add-opens java.base/java.lang=ALL-UNNAMED -version ; then + DEFAULT_JVM_OPTS="--add-opens java.base/java.lang=ALL-UNNAMED $DEFAULT_JVM_OPTS" +fi + +eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" + +# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong +if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then + cd "$(dirname "$0")" +fi + +exec "$JAVACMD" "$@" diff --git a/gradlew.bat b/gradlew.bat new file mode 100644 index 0000000..f955316 --- /dev/null +++ b/gradlew.bat @@ -0,0 +1,84 @@ +@if "%DEBUG%" == "" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%" == "" set DIRNAME=. +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS= + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if "%ERRORLEVEL%" == "0" goto init + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto init + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:init +@rem Get command-line arguments, handling Windows variants + +if not "%OS%" == "Windows_NT" goto win9xME_args + +:win9xME_args +@rem Slurp the command line arguments. +set CMD_LINE_ARGS= +set _SKIP=2 + +:win9xME_args_slurp +if "x%~1" == "x" goto execute + +set CMD_LINE_ARGS=%* + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% + +:end +@rem End local scope for the variables with windows NT shell +if "%ERRORLEVEL%"=="0" goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 +exit /b 1 + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/server/build.gradle b/server/build.gradle new file mode 100644 index 0000000..6085679 --- /dev/null +++ b/server/build.gradle @@ -0,0 +1,18 @@ +plugins { + id 'java' +} + +repositories { + mavenCentral() +} + +dependencies { + implementation project(':common') + implementation 'org.slf4j:slf4j-api:2.0.16' + implementation 'org.slf4j:slf4j-simple:2.0.16' +} + +sourceSets { + main.java.srcDirs = ['src'] + main.resources.srcDirs = ['resources'] +} diff --git a/server/src/eu/e99/svc/server/Main.java b/server/src/eu/e99/svc/server/Main.java new file mode 100644 index 0000000..700e86b --- /dev/null +++ b/server/src/eu/e99/svc/server/Main.java @@ -0,0 +1,65 @@ +package eu.e99.svc.server; + +import javax.net.ssl.KeyManagerFactory; +import javax.net.ssl.SSLContext; +import javax.net.ssl.SSLServerSocketFactory; +import java.io.FileInputStream; +import java.io.IOException; +import java.net.Inet4Address; +import java.net.InetSocketAddress; +import java.net.ServerSocket; +import java.security.KeyStore; + +public class Main { + + public static void main(String[] args) { + SSLServerSocketFactory socketFactory = createSocketFactory(); + if (socketFactory == null) { + System.exit(1); + } + + try (ServerSocket socket = socketFactory.createServerSocket()) { + socket.bind(new InetSocketAddress("0.0.0.0", 6969)); + + Server server = new Server(socket); + server.start(); + } catch (IOException e) { + e.printStackTrace(System.out); + } + } + + private static SSLServerSocketFactory createSocketFactory() { + try { + // keytool -genkeypair -keyalg RSA -keysize 2048 -validity 365 -alias mykey -keystore keystore.jks + String path = System.getenv("SVC_KEYSTORE_PATH"); + if (path == null) { + System.out.printf("Missing SVC_KEYSTORE_PATH env variable.%n"); + return null; + } + + String password = System.getenv("SVC_KEYSTORE_PASSWORD"); + if (password == null) { + System.out.printf("Missing SVC_KEYSTORE_PASSWORD env variable.%n"); + return null; + } + + KeyStore keyStore = KeyStore.getInstance("JKS"); + + try (FileInputStream keystoreFile = new FileInputStream(path)) { + keyStore.load(keystoreFile, password.toCharArray()); + } + + KeyManagerFactory managerFactory = KeyManagerFactory.getInstance("SunX509"); + managerFactory.init(keyStore, password.toCharArray()); + + SSLContext context = SSLContext.getInstance("TLS"); + context.init(managerFactory.getKeyManagers(), null, null); + + return context.getServerSocketFactory(); + } catch (Exception e) { + System.out.printf("Failed to create SSL Server Socket Factory.%n"); + e.printStackTrace(System.out); + return null; + } + } +} diff --git a/server/src/eu/e99/svc/server/Server.java b/server/src/eu/e99/svc/server/Server.java new file mode 100644 index 0000000..97f047c --- /dev/null +++ b/server/src/eu/e99/svc/server/Server.java @@ -0,0 +1,195 @@ +package eu.e99.svc.server; + +import eu.e99.svc.Connection; +import eu.e99.svc.SimplerVoiceChat; +import eu.e99.svc.auth.MojangAPI; +import eu.e99.svc.auth.PlayerProfile; +import eu.e99.svc.io.BinaryMessage; +import eu.e99.svc.packet.*; + +import java.io.IOException; +import java.net.ServerSocket; +import java.net.Socket; +import java.util.HashMap; +import java.util.Map; +import java.util.UUID; + +public class Server { + + private final ServerSocket socket; + private final Map connections; + + public Server(ServerSocket socket) { + this.socket = socket; + this.connections = new HashMap<>(); + } + + public void start() { + while (true) { + Thread.ofVirtual().start(() -> { + try (Socket client = this.socket.accept()) { + synchronized (this.socket) { + this.socket.notify(); + } + + this.handleConnection(client); + } catch (IOException e) { + synchronized (this.socket) { + this.socket.notify(); + } + + System.out.printf("Failed to accept client.%n"); + e.printStackTrace(System.out); + } + }); + + try { + synchronized (this.socket) { + this.socket.wait(); + } + } catch (InterruptedException e) { + System.out.printf("Failed to wait on server socket to accept client.%n"); + e.printStackTrace(System.out); + } + } + } + + private void handleConnection(Socket client) throws IOException { + System.out.printf("Accepted client %s.%n", client.getInetAddress()); + Connection conn = new Connection(client); + + PlayerProfile profile = this.handleHandshake(conn); + if (profile == null) { + System.out.printf("Client failed authentication.%n"); + return; + } + + try { + synchronized (this.connections) { + Connection existingConn = this.connections.get(profile.uuid()); + if (existingConn != null) { + existingConn.disconnect("Logged in from another location."); + System.out.printf("Client %s logged in from another location.%n", profile.username()); + } + + this.connections.put(profile.uuid(), conn); + System.out.printf("Client %s successfully authenticated.%n", profile.username()); + } + + this.handle(conn, profile); + } finally { + synchronized (this.connections) { + this.connections.remove(profile.uuid()); + } + } + } + + private PlayerProfile handleHandshake(Connection conn) throws IOException { + /* + 1. Client sends ClientHelloPacket + 2. Server sends AuthRequestPacket with a random server ID + 3. Client joins fake server ID using Mojang's session server + 4. Client sends AuthResponsePacket with its username + 5. Server checks if player joined the server with Mojang's session server + 6. Server sends AuthSuccessPacket + */ + + String serverId = this.generateServerId(); + + while (true) { + BinaryMessage packet = conn.readPacket(); + + switch (packet) { + case ClientHelloPacket clientHello -> { + if (clientHello.version > SimplerVoiceChat.PROTOCOL_VERSION) { + System.out.printf("Refusing to accept client, outdated server.%n"); + conn.disconnect("Outdated server. Please downgrade the mod."); + return null; + } + + if (clientHello.version < SimplerVoiceChat.PROTOCOL_VERSION) { + System.out.printf("Refusing to accept client, outdated client.%n"); + conn.disconnect("Outdated client. Please update the mode."); + return null; + } + + AuthRequestPacket authRequest = new AuthRequestPacket(); + authRequest.serverId = serverId; + conn.writePacket(authRequest); + } + case AuthResponsePacket response -> { + PlayerProfile profile; + try { + profile = MojangAPI.hasJoined(response.username, serverId); + } catch (InterruptedException e) { + System.out.printf("Failed to reach Mojang's authentication server.%n"); + e.printStackTrace(System.out); + + conn.disconnect("Mojang's authentication servers are offline. Please try again later."); + return null; + } + + if (profile == null) { + System.out.printf("Client failed authentication.%n"); + conn.disconnect("Authentication failed."); + return null; + } + + AuthSuccessPacket success = new AuthSuccessPacket(); + conn.writePacket(success); + return profile; + } + default -> { + System.out.printf("Received unexpected packet.%n"); + } + } + } + } + + private void handle(Connection conn, PlayerProfile profile) throws IOException { + while (true) { + BinaryMessage packet = conn.readPacket(); + + switch (packet) { + case DisconnectPacket disconnect -> { + System.out.printf("Client %s disconnected with the reason \"%s\"%n", profile.username(), disconnect.reason); + return; + } + case MessagePacket message -> { + Connection otherConn; + synchronized (this.connections) { + otherConn = this.connections.get(message.player); + } + + if (otherConn == null) { + // TODO: Send error to client? + continue; + } + + MessagePacket newMessage = new MessagePacket(); + newMessage.player = profile.uuid(); + newMessage.payload = message.payload; + + otherConn.writePacket(newMessage); + } + default -> { + System.out.printf("Received unexpected packet.%n"); + } + } + } + } + + private String generateServerId() { + int length = 32; + + String letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; + StringBuilder builder = new StringBuilder(length); + + for (int i = 0; i < length; i++) { + int letter = (int) (letters.length() * Math.random()); + builder.append(letters.charAt(letter)); + } + + return builder.toString(); + } +} diff --git a/settings.gradle b/settings.gradle new file mode 100644 index 0000000..fc5f453 --- /dev/null +++ b/settings.gradle @@ -0,0 +1,15 @@ +pluginManagement { + repositories { + maven { + name = 'Fabric' + url = 'https://maven.fabricmc.net/' + } + mavenCentral() + gradlePluginPortal() + } +} + +rootProject.name = 'simplervoicechat' +include 'client-fabric' +include 'common' +include 'server'