AdGuardHome/internal/next/websvc/dns.go

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package websvc
import (
"encoding/json"
"fmt"
"net/http"
"net/netip"
"time"
"github.com/AdguardTeam/AdGuardHome/internal/next/dnssvc"
)
// DNS Settings Handlers
// ReqPatchSettingsDNS describes the request to the PATCH /api/v1/settings/dns
// HTTP API.
type ReqPatchSettingsDNS struct {
// TODO(a.garipov): Add more as we go.
Addresses []netip.AddrPort `json:"addresses"`
BootstrapServers []string `json:"bootstrap_servers"`
UpstreamServers []string `json:"upstream_servers"`
DNS64Prefixes []netip.Prefix `json:"dns64_prefixes"`
UpstreamTimeout JSONDuration `json:"upstream_timeout"`
BootstrapPreferIPv6 bool `json:"bootstrap_prefer_ipv6"`
UseDNS64 bool `json:"use_dns64"`
}
// HTTPAPIDNSSettings are the DNS settings as used by the HTTP API. See the
// DnsSettings object in the OpenAPI specification.
type HTTPAPIDNSSettings struct {
// TODO(a.garipov): Add more as we go.
Addresses []netip.AddrPort `json:"addresses"`
BootstrapServers []string `json:"bootstrap_servers"`
UpstreamServers []string `json:"upstream_servers"`
DNS64Prefixes []netip.Prefix `json:"dns64_prefixes"`
UpstreamTimeout JSONDuration `json:"upstream_timeout"`
BootstrapPreferIPv6 bool `json:"bootstrap_prefer_ipv6"`
UseDNS64 bool `json:"use_dns64"`
}
// handlePatchSettingsDNS is the handler for the PATCH /api/v1/settings/dns HTTP
// API.
func (svc *Service) handlePatchSettingsDNS(w http.ResponseWriter, r *http.Request) {
req := &ReqPatchSettingsDNS{
Addresses: []netip.AddrPort{},
BootstrapServers: []string{},
UpstreamServers: []string{},
}
// TODO(a.garipov): Validate nulls and proper JSON patch.
err := json.NewDecoder(r.Body).Decode(&req)
if err != nil {
writeJSONErrorResponse(w, r, fmt.Errorf("decoding: %w", err))
return
}
newConf := &dnssvc.Config{
Addresses: req.Addresses,
BootstrapServers: req.BootstrapServers,
UpstreamServers: req.UpstreamServers,
DNS64Prefixes: req.DNS64Prefixes,
UpstreamTimeout: time.Duration(req.UpstreamTimeout),
BootstrapPreferIPv6: req.BootstrapPreferIPv6,
UseDNS64: req.UseDNS64,
}
ctx := r.Context()
err = svc.confMgr.UpdateDNS(ctx, newConf)
if err != nil {
writeJSONErrorResponse(w, r, fmt.Errorf("updating: %w", err))
return
}
newSvc := svc.confMgr.DNS()
err = newSvc.Start()
if err != nil {
writeJSONErrorResponse(w, r, fmt.Errorf("starting new service: %w", err))
return
}
writeJSONOKResponse(w, r, &HTTPAPIDNSSettings{
Addresses: newConf.Addresses,
BootstrapServers: newConf.BootstrapServers,
UpstreamServers: newConf.UpstreamServers,
DNS64Prefixes: newConf.DNS64Prefixes,
UpstreamTimeout: JSONDuration(newConf.UpstreamTimeout),
BootstrapPreferIPv6: newConf.BootstrapPreferIPv6,
UseDNS64: newConf.UseDNS64,
})
}