118 lines
2.9 KiB
Go
118 lines
2.9 KiB
Go
package main
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import (
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"fmt"
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"net"
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"os"
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"github.com/AdguardTeam/AdGuardHome/dnsfilter"
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"github.com/AdguardTeam/AdGuardHome/dnsforward"
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"github.com/AdguardTeam/dnsproxy/upstream"
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"github.com/AdguardTeam/golibs/log"
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"github.com/joomcode/errorx"
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)
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var dnsServer *dnsforward.Server
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// initDNSServer creates an instance of the dnsforward.Server
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// Please note that we must do it even if we don't start it
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// so that we had access to the query log and the stats
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func initDNSServer(baseDir string) {
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err := os.MkdirAll(baseDir, 0755)
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if err != nil {
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log.Fatalf("Cannot create DNS data dir at %s: %s", baseDir, err)
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}
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dnsServer = dnsforward.NewServer(baseDir)
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}
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func isRunning() bool {
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return dnsServer != nil && dnsServer.IsRunning()
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}
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func generateServerConfig() dnsforward.ServerConfig {
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filters := []dnsfilter.Filter{}
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userFilter := userFilter()
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filters = append(filters, dnsfilter.Filter{
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ID: userFilter.ID,
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Rules: userFilter.Rules,
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})
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for _, filter := range config.Filters {
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filters = append(filters, dnsfilter.Filter{
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ID: filter.ID,
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Rules: filter.Rules,
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})
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}
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newconfig := dnsforward.ServerConfig{
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UDPListenAddr: &net.UDPAddr{IP: net.ParseIP(config.DNS.BindHost), Port: config.DNS.Port},
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TCPListenAddr: &net.TCPAddr{IP: net.ParseIP(config.DNS.BindHost), Port: config.DNS.Port},
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FilteringConfig: config.DNS.FilteringConfig,
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Filters: filters,
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}
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if config.TLS.Enabled {
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newconfig.TLSConfig = config.TLS.TLSConfig
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if config.TLS.PortDNSOverTLS != 0 {
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newconfig.TLSListenAddr = &net.TCPAddr{IP: net.ParseIP(config.DNS.BindHost), Port: config.TLS.PortDNSOverTLS}
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}
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}
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for _, u := range config.DNS.UpstreamDNS {
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opts := upstream.Options{
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Timeout: dnsforward.DefaultTimeout,
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Bootstrap: config.DNS.BootstrapDNS,
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}
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dnsUpstream, err := upstream.AddressToUpstream(u, opts)
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if err != nil {
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log.Printf("Couldn't get upstream: %s", err)
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// continue, just ignore the upstream
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continue
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}
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newconfig.Upstreams = append(newconfig.Upstreams, dnsUpstream)
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}
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newconfig.AllServers = config.DNS.AllServers
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return newconfig
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}
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func startDNSServer() error {
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if isRunning() {
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return fmt.Errorf("unable to start forwarding DNS server: Already running")
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}
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newconfig := generateServerConfig()
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err := dnsServer.Start(&newconfig)
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if err != nil {
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return errorx.Decorate(err, "Couldn't start forwarding DNS server")
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}
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return nil
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}
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func reconfigureDNSServer() error {
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if !isRunning() {
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return fmt.Errorf("Refusing to reconfigure forwarding DNS server: not running")
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}
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config := generateServerConfig()
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err := dnsServer.Reconfigure(&config)
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if err != nil {
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return errorx.Decorate(err, "Couldn't start forwarding DNS server")
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}
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return nil
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}
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func stopDNSServer() error {
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if !isRunning() {
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return fmt.Errorf("Refusing to stop forwarding DNS server: not running")
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}
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err := dnsServer.Stop()
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if err != nil {
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return errorx.Decorate(err, "Couldn't stop forwarding DNS server")
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}
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return nil
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}
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