├── .github └── workflows │ └── build.yml ├── .gitignore ├── COPYING ├── README.md ├── build.gradle.kts ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── settings.gradle.kts └── src └── main └── kotlin └── dev └── cubxity └── tools └── stresscraft ├── StressCraft.kt ├── StressCraftOptions.kt ├── cli └── StressCraftCLI.kt ├── data └── StressCraftSession.kt ├── module └── Module.kt └── util ├── ServerTimer.kt └── Terminal.kt /.github/workflows/build.yml: -------------------------------------------------------------------------------- 1 | name: gradle-ci 2 | on: 3 | push: 4 | branches: 5 | - master 6 | 7 | jobs: 8 | build: 9 | runs-on: ubuntu-latest 10 | steps: 11 | - uses: actions/checkout@v1 12 | - name: Set up JDK 17 13 | uses: actions/setup-java@v2 14 | with: 15 | java-version: 17 16 | distribution: zulu 17 | cache: "gradle" 18 | - name: build with Gradle 19 | uses: gradle/gradle-build-action@v2 20 | with: 21 | arguments: "shadowJar" 22 | - name: upload build artifacts 23 | uses: actions/upload-artifact@v2 24 | with: 25 | path: build/libs/*.jar -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | .gradle 2 | .idea 3 | build 4 | -------------------------------------------------------------------------------- /COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # StressCraft (work in progress) 2 | 3 | [![License](https://img.shields.io/github/license/Cubxity/stresscraft?style=flat-square)](COPYING) 4 | [![Discord](https://img.shields.io/badge/join-discord-blue?style=flat-square)](https://discord.gg/vxecYcWXyf) 5 | 6 | State-of-the-art Minecraft stress testing software written in Kotlin. 7 | 8 | ## Disclaimer 9 | 10 | StressCraft should **ONLY** be used in your own server environment. We do not endorse the use of StressCraft for any other purposes than testing your own infrastructure. 11 | 12 | Please be aware that attempting to execute this with an external server as a target can be seen as **illegal** as it simulates a layer 7 DoS (denial-of-service) attack, which is against the law in most countries. 13 | 14 | ## How to use? 15 | 16 | > **NOTE:** DO NOT DO THIS IN PRODUCTION, EVER. 17 | 18 | - Ensure `max-players` (server.properties) is high enough for the number of bots you're planning to test 19 | - Set `online-mode` (server.properties) to `false` 20 | - Set `network-compression-threshold` (server.properties) to `-1` 21 | - Set `connection-throttle` (bukkit.yml) to `-1` 22 | - Increase `max-joins-per-tick` (paper.yml) to your liking 23 | - Execute the jar with proper arguments 24 | 25 | If you're on Velocity, you may also need to set `login-ratelimit` (velocity.toml) to `0` 26 | 27 | ## Who needs this? 28 | 29 | - Michael 30 | - "Cloud-native Minecraft" enthusiasts 31 | - Reliability engineers 32 | 33 | ## Roadmap 34 | 35 | *(in no particular order)* 36 | 37 | - [x] Performant stresser 38 | - [ ] Chat flooder 39 | - [ ] Scripting? 40 | - [ ] Physics simulation 41 | - [ ] Random movements 42 | - [ ] Non-TTY support 43 | - [ ] Velocity forwarding? 44 | - [ ] Dockerfile 45 | - [ ] Helm chart? 46 | - [ ] GUI Frontend? 47 | - [ ] Prometheus exporter? 48 | -------------------------------------------------------------------------------- /build.gradle.kts: -------------------------------------------------------------------------------- 1 | plugins { 2 | kotlin("jvm") version "1.7.10" 3 | id("com.github.johnrengelman.shadow") version "7.1.2" 4 | } 5 | 6 | group = "dev.cubxity.tools" 7 | version = "0.0.1" 8 | 9 | repositories { 10 | mavenCentral() 11 | maven("https://repo.opencollab.dev/maven-releases/") 12 | maven("https://repo.opencollab.dev/maven-snapshots/") 13 | } 14 | 15 | dependencies { 16 | implementation(kotlin("stdlib-jdk8")) 17 | implementation("org.jetbrains.kotlinx:kotlinx-coroutines-jdk8:1.6.4") 18 | implementation("org.jetbrains.kotlinx:kotlinx-cli-jvm:0.3.5") 19 | implementation("org.geysermc.mcprotocollib:protocol:1.21-SNAPSHOT") 20 | implementation("org.fusesource.jansi:jansi:2.4.0") 21 | } 22 | 23 | tasks { 24 | jar { 25 | manifest { 26 | attributes("Main-Class" to "dev.cubxity.tools.stresscraft.cli.StressCraftCLIKt") 27 | } 28 | } 29 | shadowJar { 30 | archiveClassifier.set("") 31 | } 32 | } 33 | -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | kotlin.code.style=official -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Cubxity/stresscraft/69093073d40e5ad60044861b011d4f8f01e8c81a/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-bin.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | # 4 | # Copyright 2015 the original author or authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | ## 21 | ## Gradle start up script for UN*X 22 | ## 23 | ############################################################################## 24 | 25 | # Attempt to set APP_HOME 26 | # Resolve links: $0 may be a link 27 | PRG="$0" 28 | # Need this for relative symlinks. 29 | while [ -h "$PRG" ] ; do 30 | ls=`ls -ld "$PRG"` 31 | link=`expr "$ls" : '.*-> \(.*\)$'` 32 | if expr "$link" : '/.*' > /dev/null; then 33 | PRG="$link" 34 | else 35 | PRG=`dirname "$PRG"`"/$link" 36 | fi 37 | done 38 | SAVED="`pwd`" 39 | cd "`dirname \"$PRG\"`/" >/dev/null 40 | APP_HOME="`pwd -P`" 41 | cd "$SAVED" >/dev/null 42 | 43 | APP_NAME="Gradle" 44 | APP_BASE_NAME=`basename "$0"` 45 | 46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 48 | 49 | # Use the maximum available, or set MAX_FD != -1 to use that value. 50 | MAX_FD="maximum" 51 | 52 | warn () { 53 | echo "$*" 54 | } 55 | 56 | die () { 57 | echo 58 | echo "$*" 59 | echo 60 | exit 1 61 | } 62 | 63 | # OS specific support (must be 'true' or 'false'). 64 | cygwin=false 65 | msys=false 66 | darwin=false 67 | nonstop=false 68 | case "`uname`" in 69 | CYGWIN* ) 70 | cygwin=true 71 | ;; 72 | Darwin* ) 73 | darwin=true 74 | ;; 75 | MSYS* | MINGW* ) 76 | msys=true 77 | ;; 78 | NONSTOP* ) 79 | nonstop=true 80 | ;; 81 | esac 82 | 83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 84 | 85 | 86 | # Determine the Java command to use to start the JVM. 87 | if [ -n "$JAVA_HOME" ] ; then 88 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 89 | # IBM's JDK on AIX uses strange locations for the executables 90 | JAVACMD="$JAVA_HOME/jre/sh/java" 91 | else 92 | JAVACMD="$JAVA_HOME/bin/java" 93 | fi 94 | if [ ! -x "$JAVACMD" ] ; then 95 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 96 | 97 | Please set the JAVA_HOME variable in your environment to match the 98 | location of your Java installation." 99 | fi 100 | else 101 | JAVACMD="java" 102 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 103 | 104 | Please set the JAVA_HOME variable in your environment to match the 105 | location of your Java installation." 106 | fi 107 | 108 | # Increase the maximum file descriptors if we can. 109 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 110 | MAX_FD_LIMIT=`ulimit -H -n` 111 | if [ $? -eq 0 ] ; then 112 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 113 | MAX_FD="$MAX_FD_LIMIT" 114 | fi 115 | ulimit -n $MAX_FD 116 | if [ $? -ne 0 ] ; then 117 | warn "Could not set maximum file descriptor limit: $MAX_FD" 118 | fi 119 | else 120 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 121 | fi 122 | fi 123 | 124 | # For Darwin, add options to specify how the application appears in the dock 125 | if $darwin; then 126 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 127 | fi 128 | 129 | # For Cygwin or MSYS, switch paths to Windows format before running java 130 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then 131 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 132 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 133 | 134 | JAVACMD=`cygpath --unix "$JAVACMD"` 135 | 136 | # We build the pattern for arguments to be converted via cygpath 137 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 138 | SEP="" 139 | for dir in $ROOTDIRSRAW ; do 140 | ROOTDIRS="$ROOTDIRS$SEP$dir" 141 | SEP="|" 142 | done 143 | OURCYGPATTERN="(^($ROOTDIRS))" 144 | # Add a user-defined pattern to the cygpath arguments 145 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 146 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 147 | fi 148 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 149 | i=0 150 | for arg in "$@" ; do 151 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 152 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 153 | 154 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 155 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 156 | else 157 | eval `echo args$i`="\"$arg\"" 158 | fi 159 | i=`expr $i + 1` 160 | done 161 | case $i in 162 | 0) set -- ;; 163 | 1) set -- "$args0" ;; 164 | 2) set -- "$args0" "$args1" ;; 165 | 3) set -- "$args0" "$args1" "$args2" ;; 166 | 4) set -- "$args0" "$args1" "$args2" "$args3" ;; 167 | 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 168 | 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 169 | 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 170 | 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 171 | 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 172 | esac 173 | fi 174 | 175 | # Escape application args 176 | save () { 177 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 178 | echo " " 179 | } 180 | APP_ARGS=`save "$@"` 181 | 182 | # Collect all arguments for the java command, following the shell quoting and substitution rules 183 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 184 | 185 | exec "$JAVACMD" "$@" 186 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%" == "" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%" == "" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter. 33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi 34 | 35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 37 | 38 | @rem Find java.exe 39 | if defined JAVA_HOME goto findJavaFromJavaHome 40 | 41 | set JAVA_EXE=java.exe 42 | %JAVA_EXE% -version >NUL 2>&1 43 | if "%ERRORLEVEL%" == "0" goto execute 44 | 45 | echo. 46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 47 | echo. 48 | echo Please set the JAVA_HOME variable in your environment to match the 49 | echo location of your Java installation. 50 | 51 | goto fail 52 | 53 | :findJavaFromJavaHome 54 | set JAVA_HOME=%JAVA_HOME:"=% 55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 56 | 57 | if exist "%JAVA_EXE%" goto execute 58 | 59 | echo. 60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 61 | echo. 62 | echo Please set the JAVA_HOME variable in your environment to match the 63 | echo location of your Java installation. 64 | 65 | goto fail 66 | 67 | :execute 68 | @rem Setup the command line 69 | 70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 71 | 72 | 73 | @rem Execute Gradle 74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* 75 | 76 | :end 77 | @rem End local scope for the variables with windows NT shell 78 | if "%ERRORLEVEL%"=="0" goto mainEnd 79 | 80 | :fail 81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 82 | rem the _cmd.exe /c_ return code! 83 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 84 | exit /b 1 85 | 86 | :mainEnd 87 | if "%OS%"=="Windows_NT" endlocal 88 | 89 | :omega 90 | -------------------------------------------------------------------------------- /settings.gradle.kts: -------------------------------------------------------------------------------- 1 | rootProject.name = "stresscraft" 2 | 3 | -------------------------------------------------------------------------------- /src/main/kotlin/dev/cubxity/tools/stresscraft/StressCraft.kt: -------------------------------------------------------------------------------- 1 | package dev.cubxity.tools.stresscraft 2 | 3 | import dev.cubxity.tools.stresscraft.data.StressCraftSession 4 | import dev.cubxity.tools.stresscraft.module.Module 5 | import kotlinx.coroutines.* 6 | import java.util.* 7 | import java.util.concurrent.atomic.AtomicInteger 8 | import kotlin.math.ceil 9 | import kotlin.system.measureNanoTime 10 | 11 | class StressCraft( 12 | val host: String, 13 | val port: Int, 14 | val options: StressCraftOptions 15 | ) { 16 | private val coroutineScope = CoroutineScope(Dispatchers.Default + SupervisorJob()) 17 | private var id = 0 18 | 19 | private val _sessions = LinkedList() 20 | private val modules = listOf() 21 | 22 | val sessionCount = AtomicInteger() 23 | val activeSessions = AtomicInteger() 24 | val chunksLoaded = AtomicInteger() 25 | 26 | val sessions: List 27 | get() = _sessions 28 | 29 | fun start() { 30 | Runtime.getRuntime().addShutdownHook(Thread { 31 | executeShutdownHook() 32 | }) 33 | 34 | coroutineScope.launch { 35 | while (true) { 36 | try { 37 | val sessions = sessionCount.get() 38 | val activeSessions = activeSessions.get() 39 | if (sessions < options.count && sessions - activeSessions < options.buffer) { 40 | createSession() 41 | } 42 | } catch (error: Throwable) { 43 | // ? 44 | } 45 | delay(options.delay.toLong()) 46 | } 47 | } 48 | 49 | // Ticking 50 | coroutineScope.launch { 51 | while (true) { 52 | val time = measureNanoTime { 53 | try { 54 | for (session in _sessions) { 55 | for (module in modules) { 56 | module.tick(session) 57 | } 58 | } 59 | } catch (error: Throwable) { 60 | // ? 61 | } 62 | } 63 | delay(50 - ceil(time / 1E6).toLong()) 64 | } 65 | } 66 | } 67 | 68 | fun removeSession(session: StressCraftSession) { 69 | synchronized(_sessions) { 70 | _sessions.remove(session) 71 | } 72 | } 73 | 74 | private fun createSession() { 75 | val name = options.prefix + "${id++}".padStart(4, '0') 76 | val session = StressCraftSession(this) 77 | synchronized(_sessions) { 78 | _sessions.add(session) 79 | } 80 | session.connect(name) 81 | } 82 | 83 | private fun executeShutdownHook() { 84 | coroutineScope.coroutineContext.job.cancel() 85 | } 86 | } 87 | -------------------------------------------------------------------------------- /src/main/kotlin/dev/cubxity/tools/stresscraft/StressCraftOptions.kt: -------------------------------------------------------------------------------- 1 | package dev.cubxity.tools.stresscraft 2 | 3 | import org.geysermc.mcprotocollib.protocol.data.game.ResourcePackStatus 4 | 5 | data class StressCraftOptions( 6 | val count: Int, 7 | val delay: Int, 8 | val buffer: Int, 9 | val prefix: String, 10 | val simulate: Boolean, 11 | val acceptResourcePacks: ResourcePackStatus? 12 | ) -------------------------------------------------------------------------------- /src/main/kotlin/dev/cubxity/tools/stresscraft/cli/StressCraftCLI.kt: -------------------------------------------------------------------------------- 1 | package dev.cubxity.tools.stresscraft.cli 2 | 3 | import dev.cubxity.tools.stresscraft.StressCraft 4 | import dev.cubxity.tools.stresscraft.StressCraftOptions 5 | import dev.cubxity.tools.stresscraft.util.Terminal 6 | import kotlinx.cli.ArgParser 7 | import kotlinx.cli.ArgType 8 | import kotlinx.cli.default 9 | import kotlinx.cli.optional 10 | import kotlinx.coroutines.delay 11 | import org.geysermc.mcprotocollib.protocol.data.game.ResourcePackStatus 12 | 13 | object StressCraftCLI { 14 | private val terminal = Terminal() 15 | 16 | suspend fun main(args: Array) { 17 | val parser = ArgParser("stresscraft") 18 | val host by parser.argument(ArgType.String, description = "the IP address or the hostname of the server") 19 | val port by parser.argument(ArgType.Int, description = "the port of the server") 20 | .optional().default(25565) 21 | val count by parser.option(ArgType.Int, "count", "c", description = "the amount of bots") 22 | .default(500) 23 | val delay by parser.option(ArgType.Int, "delay", "d", description = "delay between connections, in ms") 24 | .default(20) 25 | val buffer by parser.option(ArgType.Int, "buffer", "b", description = "buffer between connections and players") 26 | .default(20) 27 | val prefix by parser.option(ArgType.String, "prefix", "p", description = "player name prefix") 28 | .default("Player") 29 | val simulate by parser.option( 30 | ArgType.Boolean, 31 | "simulate", 32 | "s", 33 | description = "use player simulation (not implemented)" 34 | ).default(true) 35 | val acceptResourcePacks by parser.option( 36 | ArgType.Choice(), 37 | "resource_pack_response", 38 | "rp", 39 | description = "resource pack response" 40 | ) 41 | 42 | parser.parse(args) 43 | 44 | Runtime.getRuntime().addShutdownHook(Thread { 45 | terminal.close() 46 | }) 47 | terminal.init() 48 | 49 | val options = StressCraftOptions(count, delay, buffer, prefix, simulate, acceptResourcePacks) 50 | val app = StressCraft(host, port, options) 51 | app.start() 52 | 53 | while (true) { 54 | try { 55 | renderProgress(app) 56 | } catch (error: Throwable) { 57 | // ? 58 | } 59 | delay(100) 60 | } 61 | } 62 | 63 | private fun renderProgress(app: StressCraft) { 64 | terminal.renderHeader(app.host, app.port) 65 | terminal.renderGauge("\uD83D\uDCE6 Chunks", app.chunksLoaded.get()) 66 | terminal.newLine() 67 | terminal.renderProgress(app.sessionCount.get(), app.options.count, "Connections") 68 | terminal.renderProgress(app.activeSessions.get(), app.options.count, "Players") 69 | terminal.renderProgress(calculateAverageTPS(app), 20.0, "TPS (Avg)*") 70 | terminal.renderProgress(100, 100, "Michael Appreciation") 71 | terminal.reset() 72 | } 73 | 74 | private fun calculateAverageTPS(app: StressCraft): Double { 75 | var count = 0 76 | var total = 0.0 77 | for (session in app.sessions) { 78 | if (session.timer.hasData) { 79 | count++ 80 | total += session.timer.tps 81 | } 82 | } 83 | 84 | return total / count.toDouble() 85 | } 86 | } 87 | 88 | 89 | suspend fun main(args: Array) { 90 | StressCraftCLI.main(args) 91 | } -------------------------------------------------------------------------------- /src/main/kotlin/dev/cubxity/tools/stresscraft/data/StressCraftSession.kt: -------------------------------------------------------------------------------- 1 | package dev.cubxity.tools.stresscraft.data 2 | 3 | import org.geysermc.mcprotocollib.protocol.MinecraftProtocol 4 | import org.geysermc.mcprotocollib.protocol.data.game.ClientCommand 5 | import org.geysermc.mcprotocollib.protocol.data.game.ResourcePackStatus 6 | import org.geysermc.mcprotocollib.protocol.packet.ingame.clientbound.ClientboundLoginPacket 7 | import org.geysermc.mcprotocollib.protocol.packet.common.clientbound.ClientboundResourcePackPushPacket 8 | import org.geysermc.mcprotocollib.protocol.packet.ingame.clientbound.ClientboundRespawnPacket 9 | import org.geysermc.mcprotocollib.protocol.packet.ingame.clientbound.entity.player.ClientboundPlayerPositionPacket 10 | import org.geysermc.mcprotocollib.protocol.packet.ingame.clientbound.entity.player.ClientboundSetHealthPacket 11 | import org.geysermc.mcprotocollib.protocol.packet.ingame.clientbound.level.ClientboundForgetLevelChunkPacket 12 | import org.geysermc.mcprotocollib.protocol.packet.ingame.clientbound.level.ClientboundLevelChunkWithLightPacket 13 | import org.geysermc.mcprotocollib.protocol.packet.ingame.clientbound.level.ClientboundSetTimePacket 14 | import org.geysermc.mcprotocollib.protocol.packet.ingame.serverbound.ServerboundClientCommandPacket 15 | import org.geysermc.mcprotocollib.protocol.packet.common.serverbound.ServerboundResourcePackPacket 16 | import org.geysermc.mcprotocollib.protocol.packet.ingame.serverbound.level.ServerboundAcceptTeleportationPacket 17 | import org.geysermc.mcprotocollib.network.Session 18 | import org.geysermc.mcprotocollib.network.event.session.DisconnectedEvent 19 | import org.geysermc.mcprotocollib.network.event.session.SessionAdapter 20 | import org.geysermc.mcprotocollib.network.packet.Packet 21 | import org.geysermc.mcprotocollib.network.tcp.TcpClientSession 22 | import dev.cubxity.tools.stresscraft.StressCraft 23 | import dev.cubxity.tools.stresscraft.util.ServerTimer 24 | 25 | class StressCraftSession(private val app: StressCraft) : SessionAdapter() { 26 | private var wasAlive = false 27 | private var wasActive = false 28 | private var previousChunkCount = 0 29 | 30 | private val chunks = HashSet() 31 | private var _session: Session? = null 32 | 33 | val timer = ServerTimer() 34 | 35 | val session: Session 36 | get() = _session ?: error("session has not initialized") 37 | 38 | fun connect(name: String) { 39 | val protocol = MinecraftProtocol(name) 40 | val session = TcpClientSession(app.host, app.port, protocol) 41 | 42 | session.addListener(this) 43 | 44 | app.sessionCount.incrementAndGet() 45 | wasAlive = true 46 | try { 47 | _session = session 48 | session.connect() 49 | } catch (error: Throwable) { 50 | handleDisconnect() 51 | } 52 | } 53 | 54 | override fun packetReceived(session: Session, packet: Packet) { 55 | when (packet) { 56 | is ClientboundLoginPacket -> { 57 | if (!wasActive) { 58 | app.activeSessions.incrementAndGet() 59 | wasActive = true 60 | } 61 | } 62 | is ClientboundRespawnPacket -> { 63 | chunks.clear() 64 | app.chunksLoaded.addAndGet(-previousChunkCount) 65 | previousChunkCount = 0 66 | } 67 | is ClientboundSetHealthPacket -> { 68 | if (packet.health <= 0) { 69 | session.send(ServerboundClientCommandPacket(ClientCommand.RESPAWN)) 70 | } 71 | } 72 | is ClientboundPlayerPositionPacket -> { 73 | session.send(ServerboundAcceptTeleportationPacket(packet.teleportId)) 74 | } 75 | is ClientboundLevelChunkWithLightPacket -> { 76 | chunks.add(computeKey(packet.x, packet.z)) 77 | 78 | val size = chunks.size 79 | app.chunksLoaded.addAndGet(size - previousChunkCount) 80 | previousChunkCount = size 81 | } 82 | is ClientboundForgetLevelChunkPacket -> { 83 | chunks.remove(computeKey(packet.x, packet.z)) 84 | 85 | val size = chunks.size 86 | app.chunksLoaded.addAndGet(size - previousChunkCount) 87 | previousChunkCount = size 88 | } 89 | is ClientboundSetTimePacket -> { 90 | timer.onWorldTimeUpdate(packet.time) 91 | } 92 | is ClientboundResourcePackPushPacket -> { 93 | app.options.acceptResourcePacks 94 | ?.let { ServerboundResourcePackPacket(packet.id, it) } 95 | ?.let(session::send) 96 | } 97 | } 98 | } 99 | 100 | override fun disconnected(event: DisconnectedEvent?) { 101 | handleDisconnect() 102 | } 103 | 104 | private fun computeKey(x: Int, z: Int): Long = 105 | x.toLong().shl(32) or (z.toLong().and(0xFFFFFFFFL)) 106 | 107 | private fun handleDisconnect() { 108 | app.removeSession(this) 109 | if (wasAlive) { 110 | app.sessionCount.decrementAndGet() 111 | wasAlive = false 112 | } 113 | if (wasActive) { 114 | app.activeSessions.decrementAndGet() 115 | wasActive = false 116 | } 117 | chunks.clear() 118 | app.chunksLoaded.addAndGet(-previousChunkCount) 119 | previousChunkCount = 0 120 | _session = null 121 | } 122 | } -------------------------------------------------------------------------------- /src/main/kotlin/dev/cubxity/tools/stresscraft/module/Module.kt: -------------------------------------------------------------------------------- 1 | package dev.cubxity.tools.stresscraft.module 2 | 3 | import dev.cubxity.tools.stresscraft.StressCraft 4 | import dev.cubxity.tools.stresscraft.data.StressCraftSession 5 | import org.geysermc.mcprotocollib.network.packet.Packet 6 | 7 | interface Module { 8 | fun register(app: StressCraft) {} 9 | 10 | fun tick(session: StressCraftSession) {} 11 | 12 | fun handlePacket(session: StressCraftSession, packet: Packet) {} 13 | } -------------------------------------------------------------------------------- /src/main/kotlin/dev/cubxity/tools/stresscraft/util/ServerTimer.kt: -------------------------------------------------------------------------------- 1 | package dev.cubxity.tools.stresscraft.util 2 | 3 | class ServerTimer { 4 | private var lastServerTick: Long = -1 5 | private var lastServerTimeUpdate: Long = -1 6 | 7 | var mspt: Double = 50.0 8 | private set 9 | var tps: Double = 20.0 10 | private set 11 | 12 | val hasData: Boolean 13 | get() = lastServerTick != -1L 14 | 15 | fun onWorldTimeUpdate(worldTime: Long) { 16 | val time = System.nanoTime() 17 | if (lastServerTick != -1L && lastServerTimeUpdate != -1L) { 18 | val elapsedTicks = worldTime - lastServerTick 19 | 20 | if (elapsedTicks > 0) { 21 | mspt = (time - lastServerTimeUpdate).toDouble() / elapsedTicks.toDouble() / 1.0E6 22 | tps = if (mspt <= 50) 20.0 else 1000.0 / mspt 23 | } 24 | } 25 | 26 | lastServerTick = worldTime 27 | lastServerTimeUpdate = time 28 | } 29 | } -------------------------------------------------------------------------------- /src/main/kotlin/dev/cubxity/tools/stresscraft/util/Terminal.kt: -------------------------------------------------------------------------------- 1 | package dev.cubxity.tools.stresscraft.util 2 | 3 | import org.fusesource.jansi.Ansi 4 | import org.fusesource.jansi.AnsiConsole 5 | import java.io.Closeable 6 | import java.text.NumberFormat 7 | import kotlin.math.min 8 | 9 | class Terminal : Closeable { 10 | private val width = 40 11 | private var dy = 0 12 | 13 | private val format = NumberFormat.getInstance() 14 | 15 | fun init() { 16 | System.setProperty(AnsiConsole.JANSI_MODE, AnsiConsole.JANSI_MODE_FORCE) 17 | AnsiConsole.systemInstall() 18 | println("\u001b[?25l") // Hide cursor 19 | } 20 | 21 | fun renderHeader(host: String, port: Int) { 22 | val ansi = Ansi.ansi() 23 | .eraseLine() 24 | .fg(Ansi.Color.YELLOW) 25 | .a("\uD83D\uDE80 StressCraft by Cubxity ") 26 | .fg(Ansi.Color.BLUE) 27 | .a("[$host:$port]") 28 | .reset() 29 | print(ansi) 30 | newLine() 31 | } 32 | 33 | fun renderGauge(label: String, value: Int) = 34 | renderInfo(label, format.format(value)) 35 | 36 | fun renderInfo(label: String, value: String) { 37 | val ansi = Ansi.ansi() 38 | .eraseLine() 39 | .fg(Ansi.Color.GREEN) 40 | .a(label) 41 | .a(": ") 42 | .reset() 43 | .a(value) 44 | print(ansi) 45 | newLine() 46 | } 47 | 48 | fun renderProgress(value: Double, total: Double, label: String) { 49 | val fill = (min(value, total) / total * width).toInt() 50 | val ansi = Ansi.ansi() 51 | .eraseLine() 52 | .fg(Ansi.Color.CYAN) 53 | .a("\u2588".repeat(fill) + "\u2591".repeat(width - fill)) 54 | .reset() 55 | .a(" - ${format.format(value)}/${format.format(total)} $label") 56 | print(ansi) 57 | newLine() 58 | } 59 | 60 | fun renderProgress(value: Int, total: Int, label: String) { 61 | val fill = (min(value, total) / total.toDouble() * width).toInt() 62 | val ansi = Ansi.ansi() 63 | .eraseLine() 64 | .fg(Ansi.Color.CYAN) 65 | .a("\u2588".repeat(fill) + "\u2591".repeat(width - fill)) 66 | .reset() 67 | .a(" - ${format.format(value)}/${format.format(total)} $label") 68 | print(ansi) 69 | newLine() 70 | } 71 | 72 | fun newLine() { 73 | println() 74 | dy++ 75 | } 76 | 77 | fun reset() { 78 | val ansi = Ansi.ansi() 79 | .cursorMove(0, -dy) 80 | .cursorToColumn(1) 81 | dy = 0 82 | print(ansi) 83 | } 84 | 85 | override fun close() { 86 | print("\u001b[?25h") // Show cursor 87 | AnsiConsole.systemUninstall() 88 | } 89 | } 90 | --------------------------------------------------------------------------------