From a89cbe5a93aede3703cd5981ea71827b55db0866 Mon Sep 17 00:00:00 2001 From: Keuin Date: Mon, 12 Feb 2024 18:16:16 +0800 Subject: initial version --- .gitignore | 3 + LICENSE | 674 ++++++++++++++++++++++++++++++++++++++++++++++++ config/config.go | 52 ++++ go.mod | 45 ++++ go.sum | 116 +++++++++ yggdrasil/muxserver.go | 94 +++++++ yggdrasil/realserver.go | 88 +++++++ yggdrasil/server.go | 26 ++ ymux.go | 104 ++++++++ ymux.toml | 12 + 10 files changed, 1214 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 config/config.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 yggdrasil/muxserver.go create mode 100644 yggdrasil/realserver.go create mode 100644 yggdrasil/server.go create mode 100644 ymux.go create mode 100644 ymux.toml diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..56fad2d --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +.idea/ +.code/ +.vscode/ diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/config/config.go b/config/config.go new file mode 100644 index 0000000..599f12c --- /dev/null +++ b/config/config.go @@ -0,0 +1,52 @@ +package config + +import ( + "errors" + "fmt" + "github.com/BurntSushi/toml" + "net/url" + "os" +) + +type Config struct { + Servers []struct { + Name string `toml:"name"` + Prefix string `toml:"prefix"` + Proxy string `toml:"proxy"` + } `toml:"servers"` + Debug bool `toml:"debug"` + Listen string `toml:"listen"` +} + +func (c Config) Validate() error { + if len(c.Servers) == 0 { + return errors.New("no yggdrasil server specified") + } + for _, s := range c.Servers { + if s.Prefix == "" { + return fmt.Errorf("missing prefix for yggdrasil server `%v`", s.Name) + } + _, err := url.Parse(s.Prefix) + if err != nil { + return fmt.Errorf("invalid prefix for yggdrasil server `%v`: %w", s.Name, err) + } + } + return nil +} + +func Read(path string) (*Config, error) { + f, err := os.Open(path) + if err != nil { + return nil, fmt.Errorf("open: %w", err) + } + defer func() { + _ = f.Close() + }() + dec := toml.NewDecoder(f) + var c Config + _, err = dec.Decode(&c) + if err != nil { + return nil, fmt.Errorf("decode: %w", err) + } + return &c, nil +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..f39a409 --- /dev/null +++ b/go.mod @@ -0,0 +1,45 @@ +module github.com/keuin/ymux-go + +go 1.20 + +require ( + github.com/BurntSushi/toml v1.3.2 + github.com/akamensky/argparse v1.4.0 + github.com/avast/retry-go v3.0.0+incompatible + github.com/gin-gonic/gin v1.9.1 + github.com/imroc/req v0.3.2 + github.com/rs/zerolog v1.32.0 + github.com/samber/lo v1.39.0 + github.com/samber/mo v1.11.0 + github.com/sourcegraph/conc v0.3.0 +) + +require ( + github.com/bytedance/sonic v1.9.1 // indirect + github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect + github.com/gabriel-vasile/mimetype v1.4.2 // indirect + github.com/gin-contrib/sse v0.1.0 // indirect + github.com/go-playground/locales v0.14.1 // indirect + github.com/go-playground/universal-translator v0.18.1 // indirect + github.com/go-playground/validator/v10 v10.14.0 // indirect + github.com/goccy/go-json v0.10.2 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/klauspost/cpuid/v2 v2.2.4 // indirect + github.com/kr/text v0.2.0 // indirect + github.com/leodido/go-urn v1.2.4 // indirect + github.com/mattn/go-colorable v0.1.13 // indirect + github.com/mattn/go-isatty v0.0.19 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/pelletier/go-toml/v2 v2.0.8 // indirect + github.com/twitchyliquid64/golang-asm v0.15.1 // indirect + github.com/ugorji/go/codec v1.2.11 // indirect + golang.org/x/arch v0.3.0 // indirect + golang.org/x/crypto v0.9.0 // indirect + golang.org/x/exp v0.0.0-20220303212507-bbda1eaf7a17 // indirect + golang.org/x/net v0.10.0 // indirect + golang.org/x/sys v0.12.0 // indirect + golang.org/x/text v0.9.0 // indirect + google.golang.org/protobuf v1.30.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..3a30aca --- /dev/null +++ b/go.sum @@ -0,0 +1,116 @@ +github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8= +github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ= +github.com/akamensky/argparse v1.4.0 h1:YGzvsTqCvbEZhL8zZu2AiA5nq805NZh75JNj4ajn1xc= +github.com/akamensky/argparse v1.4.0/go.mod h1:S5kwC7IuDcEr5VeXtGPRVZ5o/FdhcMlQz4IZQuw64xA= +github.com/avast/retry-go v3.0.0+incompatible h1:4SOWQ7Qs+oroOTQOYnAHqelpCO0biHSxpiH9JdtuBj0= +github.com/avast/retry-go v3.0.0+incompatible/go.mod h1:XtSnn+n/sHqQIpZ10K1qAevBhOOCWBLXXy3hyiqqBrY= +github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM= +github.com/bytedance/sonic v1.9.1 h1:6iJ6NqdoxCDr6mbY8h18oSO+cShGSMRGCEo7F2h0x8s= +github.com/bytedance/sonic v1.9.1/go.mod h1:i736AoUSYt75HyZLoJW9ERYxcy6eaN6h4BZXU064P/U= +github.com/chenzhuoyu/base64x v0.0.0-20211019084208-fb5309c8db06/go.mod h1:DH46F32mSOjUmXrMHnKwZdA8wcEefY7UVqBKYGjpdQY= +github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 h1:qSGYFH7+jGhDF8vLC+iwCD4WpbV1EBDSzWkJODFLams= +github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311/go.mod h1:b583jCggY9gE99b6G5LEC39OIiVsWj+R97kbl5odCEk= +github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc= +github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/gabriel-vasile/mimetype v1.4.2 h1:w5qFW6JKBz9Y393Y4q372O9A7cUSequkh1Q7OhCmWKU= +github.com/gabriel-vasile/mimetype v1.4.2/go.mod h1:zApsH/mKG4w07erKIaJPFiX0Tsq9BFQgN3qGY5GnNgA= +github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE= +github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI= +github.com/gin-gonic/gin v1.9.1 h1:4idEAncQnU5cB7BeOkPtxjfCSye0AAm1R0RVIqJ+Jmg= +github.com/gin-gonic/gin v1.9.1/go.mod h1:hPrL7YrpYKXt5YId3A/Tnip5kqbEAP+KLuI3SUcPTeU= +github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s= +github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA= +github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY= +github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY= +github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY= +github.com/go-playground/validator/v10 v10.14.0 h1:vgvQWe3XCz3gIeFDm/HnTIbj6UGmg/+t63MyGU2n5js= +github.com/go-playground/validator/v10 v10.14.0/go.mod h1:9iXMNT7sEkjXb0I+enO7QXmzG6QCsPWY4zveKFVRSyU= +github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU= +github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I= +github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA= +github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk= +github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU= +github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= +github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg= +github.com/imroc/req v0.3.2 h1:M/JkeU6RPmX+WYvT2vaaOL0K+q8ufL5LxwvJc4xeB4o= +github.com/imroc/req v0.3.2/go.mod h1:F+NZ+2EFSo6EFXdeIbpfE9hcC233id70kf0byW97Caw= +github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM= +github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo= +github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg= +github.com/klauspost/cpuid/v2 v2.2.4 h1:acbojRNwl3o09bUq+yDCtZFc1aiwaAAxtcn8YkZXnvk= +github.com/klauspost/cpuid/v2 v2.2.4/go.mod h1:RVVoqg1df56z8g3pUjL/3lE5UfnlrJX8tyFgg4nqhuY= +github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0= +github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY= +github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE= +github.com/leodido/go-urn v1.2.4 h1:XlAE/cm/ms7TE/VMVoduSpNBoyc2dOxHs5MZSwAN63Q= +github.com/leodido/go-urn v1.2.4/go.mod h1:7ZrI8mTSeBSHl/UaRyKQW1qZeMgak41ANeCNaVckg+4= +github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA= +github.com/mattn/go-colorable v0.1.13/go.mod 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a/yggdrasil/muxserver.go b/yggdrasil/muxserver.go new file mode 100644 index 0000000..7db4021 --- /dev/null +++ b/yggdrasil/muxserver.go @@ -0,0 +1,94 @@ +package yggdrasil + +import ( + "fmt" + "github.com/avast/retry-go" + "github.com/rs/zerolog/log" + "github.com/samber/lo" + "github.com/samber/mo" + "github.com/sourcegraph/conc" + "strings" + "time" +) + +const ( + retryInterval = 100 * time.Millisecond + maxRetryTimes = 3 +) + +type muxServer struct { + subServers []Server +} + +func (m muxServer) Name() string { + return "muxServer[" + strings.Join(lo.Map(m.subServers, func(item Server, _ int) string { + return item.Name() + }), ", ") + "]" +} + +func (m muxServer) HasJoined(username string, serverID string) (*HasJoinedResponse, error) { + var wg conc.WaitGroup + type Ret = *HasJoinedResponse + results := make(chan mo.Result[Ret], len(m.subServers)) + for _, s := range m.subServers { + s := s + wg.Go(func() { + var resp *HasJoinedResponse + err := retry.Do( + func() error { + var err error + resp, err = s.HasJoined(username, serverID) + return err + }, + retry.Delay(retryInterval), + retry.Attempts(maxRetryTimes), + ) + if err != nil { + results <- mo.Err[Ret](fmt.Errorf("call hasJoined on server `%v` failed: %w", + s.Name(), err)) + } else { + results <- mo.Ok[Ret](resp) + } + }) + } + + chPanic := make(chan error, 1) + go func() { + // wait for all async tasks to finish in another async goroutine + // to allow the main request return as early as possible + r := wg.WaitAndRecover() + close(results) + if r != nil { + chPanic <- r.AsError() + } + close(chPanic) + }() + + var last *Ret + for r := range results { + r, err := r.Get() + if err != nil { + log.Error().Err(err).Msg("hasJoined failed") + continue + } + last = &r + // return the first positive result + if r.HasJoined() { + return r, nil + } + } + if last == nil { + // no data generated, all async tasks panicked + err := <-chPanic + log.Error().Err(err).Msg("all hasJoined async query panicked") + return nil, err + } else { + return *last, nil + } +} + +func NewMuxServer(servers ...Server) Server { + return muxServer{ + subServers: servers, + } +} diff --git a/yggdrasil/realserver.go b/yggdrasil/realserver.go new file mode 100644 index 0000000..86f4887 --- /dev/null +++ b/yggdrasil/realserver.go @@ -0,0 +1,88 @@ +package yggdrasil + +import ( + "encoding/json" + "fmt" + "github.com/imroc/req" + "github.com/rs/zerolog/log" + "net/url" + "time" +) + +type realServer struct { + req *req.Req + apiPrefix string + name string +} + +func (r realServer) Name() string { + return r.name +} + +func (r realServer) HasJoined(username string, serverID string) (*HasJoinedResponse, error) { + u, err := url.Parse(r.apiPrefix + "/session/minecraft/hasJoined") + if err != nil { + return nil, fmt.Errorf("url parse: %w", err) + } + q := u.Query() + q.Set("username", username) + q.Set("serverId", serverID) + u.RawQuery = q.Encode() + url2 := u.String() + log.Debug().Str("url", url2).Msg("hasJoined request") + resp, err := r.req.Get(url2) + if err != nil { + return nil, fmt.Errorf("http request: %w", err) + } + respBytes := resp.Bytes() + var resp2 HasJoinedResponse + // decode JSON only if HTTP status code is OK + if resp.Response().StatusCode == 200 { + err := json.Unmarshal(respBytes, &resp2) + if err != nil { + log.Error(). + Str("body", string(respBytes)). + Err(err). + Msg("unmarshal response body JSON failed") + } + } + resp2.StatusCode = resp.Response().StatusCode + resp2.RawBody = respBytes + resp2.ServerName = r.name + log.Debug(). + Int("statusCode", resp2.StatusCode). + Str("rawBody", string(respBytes)). + Msg("hasJoined response") + return &resp2, nil +} + +func NewServer(apiPrefix string, opt ...NewServerOptions) (Server, error) { + name := "" + r := req.New() + if len(opt) > 0 { + if p := opt[0].Proxy; p != "" { + err := r.SetProxyUrl(p) + if err != nil { + return nil, fmt.Errorf("set proxy url: %w", err) + } + } + if t := opt[0].Timeout; t > 0 { + r.SetTimeout(t) + } + if n := opt[0].Name; n != "" { + name = n + } + } + return realServer{ + req: r, + apiPrefix: apiPrefix, + name: name, + }, nil +} + +type NewServerOptions struct { + Name string + Proxy string + // Timeout is HTTP API request timeout + Timeout time.Duration +} diff --git a/yggdrasil/server.go b/yggdrasil/server.go new file mode 100644 index 0000000..818f3ed --- /dev/null +++ b/yggdrasil/server.go @@ -0,0 +1,26 @@ +package yggdrasil + +type Server interface { + // HasJoined returns nil if and only if err != nil + HasJoined(username string, serverID string) (*HasJoinedResponse, error) + // Name returns a human-readable, unique name of this server + Name() string +} + +type HasJoinedResponse struct { + StatusCode int `json:"-"` + RawBody []byte `json:"-"` + ServerName string `json:"-"` + + ID string `json:"id"` + Name string `json:"name"` + Properties []struct { + Name string `json:"name"` + Value string `json:"value"` + Signature string `json:"signature,omitempty"` + } `json:"properties"` +} + +func (r HasJoinedResponse) HasJoined() bool { + return r.StatusCode == 200 && r.ID != "" && r.Name != "" +} diff --git a/ymux.go b/ymux.go new file mode 100644 index 0000000..8b09fc8 --- /dev/null +++ b/ymux.go @@ -0,0 +1,104 @@ +package main + +import ( + "fmt" + "github.com/akamensky/argparse" + "github.com/gin-gonic/gin" + "github.com/keuin/ymux-go/config" + "github.com/keuin/ymux-go/yggdrasil" + "github.com/rs/zerolog" + "github.com/rs/zerolog/log" + "os" + "strings" +) + +const applicationJson = "application/json" + +func main() { + p := argparse.NewParser("ymux-go", "Minecraft Yggdrasil server mux") + configFile := p.String("c", "config", &argparse.Options{ + Required: true, + Help: "path to the config file", + }) + err := p.Parse(os.Args) + if err != nil { + fmt.Print(p.Usage(err)) + return + } + + cfg, err := config.Read(*configFile) + if err != nil { + panic(fmt.Errorf("error reading config file: %w", err)) + } + err = cfg.Validate() + if err != nil { + panic(fmt.Errorf("config validation failed: %w", err)) + } + ss, err := createServers(cfg) + if err != nil { + panic(err) + } + s := yggdrasil.NewMuxServer(ss...) + + if cfg.Debug { + log.Logger = log.Logger.Level(zerolog.DebugLevel) + } else { + log.Logger = log.Logger.Level(zerolog.InfoLevel) + gin.SetMode(gin.ReleaseMode) + } + log.Debug().Msg("debug mode is enabled") + r := gin.Default() + r.GET("/", func(c *gin.Context) { + // servers with authlib-injector will call this API on boot + // we need this to make them happy + c.Data(200, applicationJson, []byte(`{}`)) + }) + r.GET("/sessionserver/session/minecraft/hasJoined", func(c *gin.Context) { + var args struct { + Username string `form:"username"` + ServerID string `form:"serverId"` + } + err := c.ShouldBindQuery(&args) + if err != nil { + _ = c.AbortWithError(400, err) + return + } + r, err := s.HasJoined(args.Username, args.ServerID) + if err != nil { + log.Error().Err(err).Msg("ymux hasJoined API failed") + _ = c.AbortWithError(500, err) + return + } + log.Info(). + Str("username", args.Username). + Str("serverId", args.ServerID). + Str("yggdrasilServer", r.ServerName). + Bool("hasJoined", r.HasJoined()). + Msg("ymux hasJoined API OK") + if r.HasJoined() { + c.Data(200, applicationJson, r.RawBody) + return + } + c.Status(204) + }) + err = r.Run(cfg.Listen) + if err != nil { + panic(fmt.Errorf("error running http server: %w", err)) + } +} + +func createServers(cfg *config.Config) ([]yggdrasil.Server, error) { + var servers []yggdrasil.Server + for _, s := range cfg.Servers { + s.Prefix = strings.TrimRight(s.Prefix, "/") + ys, err := yggdrasil.NewServer(s.Prefix, yggdrasil.NewServerOptions{ + Name: s.Name, + Proxy: s.Proxy, + }) + if err != nil { + return nil, fmt.Errorf("parse server `%v`: %w", s.Name, err) + } + servers = append(servers, ys) + } + return servers, nil +} diff --git a/ymux.toml b/ymux.toml new file mode 100644 index 0000000..d18bcfe --- /dev/null +++ b/ymux.toml @@ -0,0 +1,12 @@ +debug = false +listen = "127.0.0.1:32217" + +[[servers]] +name = "official" +prefix = "https://sessionserver.mojang.com" +proxy = "" + +[[servers]] +name = "littleskin" +prefix = "https://littleskin.cn/api/yggdrasil/sessionserver" +proxy = "" -- cgit v1.2.3