AdGuardHome/coredns.go

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package main
import (
"fmt"
"log"
"net"
"github.com/AdguardTeam/AdGuardHome/dnsfilter"
"github.com/AdguardTeam/AdGuardHome/dnsforward"
"github.com/joomcode/errorx"
)
var dnsServer = dnsforward.Server{}
func isRunning() bool {
return dnsServer.IsRunning()
}
func generateServerConfig() dnsforward.ServerConfig {
filters := []dnsfilter.Filter{}
userFilter := userFilter()
filters = append(filters, dnsfilter.Filter{
ID: userFilter.ID,
Rules: userFilter.Rules,
})
for _, filter := range config.Filters {
filters = append(filters, dnsfilter.Filter{
ID: filter.ID,
Rules: filter.Rules,
})
}
newconfig := dnsforward.ServerConfig{
UDPListenAddr: &net.UDPAddr{Port: config.CoreDNS.Port},
FilteringConfig: config.CoreDNS.FilteringConfig,
Filters: filters,
}
for _, u := range config.CoreDNS.UpstreamDNS {
upstream, err := dnsforward.GetUpstream(u)
if err != nil {
log.Printf("Couldn't get upstream: %s", err)
// continue, just ignore the upstream
continue
}
newconfig.Upstreams = append(newconfig.Upstreams, upstream)
}
return newconfig
}
func startDNSServer() error {
if isRunning() {
return fmt.Errorf("Unable to start forwarding DNS server: Already running")
}
newconfig := generateServerConfig()
err := dnsServer.Start(&newconfig)
if err != nil {
return errorx.Decorate(err, "Couldn't start forwarding DNS server")
}
return nil
}
func reconfigureDNSServer() error {
if !isRunning() {
return fmt.Errorf("Refusing to reconfigure forwarding DNS server: not running")
}
err := dnsServer.Reconfigure(generateServerConfig())
if err != nil {
return errorx.Decorate(err, "Couldn't start forwarding DNS server")
}
return nil
}