initial commit
This commit is contained in:
commit
7b07a81a5b
GPG Key ID:
FDBF740DADDCEECF
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# Default ignored files
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/shelf/
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/workspace.xml
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# Editor-based HTTP Client requests
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/httpRequests/
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# Datasource local storage ignored files
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/dataSources/
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/dataSources.local.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="ProjectModuleManager">
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<modules>
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<module fileurl="file://$PROJECT_DIR$/.idea/pancheri.iml" filepath="$PROJECT_DIR$/.idea/pancheri.iml" />
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</modules>
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</component>
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</project>
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<?xml version="1.0" encoding="UTF-8"?>
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<module type="WEB_MODULE" version="4">
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<component name="Go" enabled="true" />
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<component name="NewModuleRootManager">
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<content url="file://$MODULE_DIR$" />
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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</component>
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</module>
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# Pancheri
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A custom-built authoritative DNS server and proxy server built for the e3team internal network.
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Capable of serving arbitrary custom domains and asking an upstream DNS server for all other queries.
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package main
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import (
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"flag"
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"fmt"
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"git.e3t.cc/e3team/pancheri"
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"github.com/miekg/dns"
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"github.com/sirupsen/logrus"
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"os"
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)
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func main() {
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configPath := flag.String("config", "/etc/pancheri/config.yml", "Path to enter a file or directory to load configuration from")
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printUsage := flag.Bool("help", false, "Print command line usage")
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flag.Parse()
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if *printUsage {
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flag.Usage()
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os.Exit(0)
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}
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c, err := pancheri.LoadConfig(*configPath)
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if err != nil {
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fmt.Printf("failed to load config: %s", err)
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}
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if c.Logging.Format == "json" {
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logrus.SetFormatter(&logrus.JSONFormatter{})
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}
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logrus.SetLevel(c.Logging.Level)
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logrus.WithFields(logrus.Fields{
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"host": c.Server.Host,
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"port": c.Server.Port,
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}).Info("starting DNS listener")
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var r *pancheri.Resolver
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if c.Resolver.Enable {
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logrus.WithFields(logrus.Fields{
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"upstream": c.Resolver.Upstream,
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}).Info("enabling upstream resolver")
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r = pancheri.NewResolver(c.Resolver.Upstream)
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err = r.Resolve("example.com", dns.TypeA)
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if err != nil {
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logrus.Errorf("failed to resolve: %s", err)
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}
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}
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}
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server:
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host: "0.0.0.0"
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port: 53
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package pancheri
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import (
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"github.com/sirupsen/logrus"
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"gopkg.in/yaml.v2"
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"os"
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)
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type Config struct {
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Server struct {
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Host string `yaml:"host"`
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Port string `yaml:"port"`
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} `yaml:"server"`
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Resolver struct {
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Enable bool `yaml:"enable"`
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Upstream string `yaml:"upstream"`
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}
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Logging struct {
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Format string `yaml:"format"`
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Level logrus.Level `yaml:"level"`
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}
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}
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func LoadConfig(path string) (*Config, error) {
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f, err := os.Open(path)
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if err != nil {
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return nil, err
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}
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var cfg Config
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decoder := yaml.NewDecoder(f)
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err = decoder.Decode(&cfg)
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if err != nil {
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return nil, err
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}
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err = f.Close()
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if err != nil {
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return nil, err
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}
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return &cfg, nil
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}
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module git.e3t.cc/e3team/pancheri
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go 1.21
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require (
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github.com/miekg/dns v1.1.56 // indirect
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github.com/sirupsen/logrus v1.9.3 // indirect
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golang.org/x/mod v0.12.0 // indirect
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golang.org/x/net v0.15.0 // indirect
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golang.org/x/sys v0.12.0 // indirect
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golang.org/x/tools v0.13.0 // indirect
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gopkg.in/yaml.v2 v2.4.0 // indirect
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)
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github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/miekg/dns v1.1.56 h1:5imZaSeoRNvpM9SzWNhEcP9QliKiz20/dA2QabIGVnE=
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github.com/miekg/dns v1.1.56/go.mod h1:cRm6Oo2C8TY9ZS/TqsSrseAcncm74lfK5G+ikN2SWWY=
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github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
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github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
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golang.org/x/mod v0.12.0 h1:rmsUpXtvNzj340zd98LZ4KntptpfRHwpFOHG188oHXc=
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golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
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golang.org/x/net v0.15.0 h1:ugBLEUaxABaB5AJqW9enI0ACdci2RUd4eP51NTBvuJ8=
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golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
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golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
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golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/tools v0.13.0 h1:Iey4qkscZuv0VvIt8E0neZjtPVQFSc870HQ448QgEmQ=
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golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
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gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
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gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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@ -0,0 +1,41 @@
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package pancheri
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import (
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"github.com/miekg/dns"
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"github.com/sirupsen/logrus"
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)
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type Resolver struct {
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client *dns.Client
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upstream string
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}
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func NewResolver(upstream string) *Resolver {
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return &Resolver{
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client: new(dns.Client),
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upstream: upstream,
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}
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}
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func (r *Resolver) Resolve(domain string, qtype uint16) error {
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logrus.WithFields(logrus.Fields{
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"domain": domain,
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"qtype": qtype,
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}).Trace("performing upstream resolution")
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m := new(dns.Msg)
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m.SetQuestion(dns.Fqdn(domain), qtype)
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m.RecursionDesired = true
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in, _, err := r.client.Exchange(m, r.upstream)
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if err != nil {
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return err
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}
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for _, ans := range in.Answer {
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logrus.Debug(ans)
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}
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return nil
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}
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