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Pull request: 3136 show default resolvers

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Merge in DNS/adguard-home from 3136-show-default to master

Closes #3136.

Squashed commit of the following:

commit add09a772dddcccd404056e7649c2d3350a79fec
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Tue Jun 1 11:11:24 2021 +0300

    openapi: fix typo

commit 69e402c49318d53a0d03b81207644d9fb04a139a
Merge: 76e8492c e17e1f20
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Tue Jun 1 11:09:51 2021 +0300

    Merge branch 'master' into 3136-show-default

commit 76e8492c8da679e204ceb7a77f1c6f73a2488040
Author: Ildar Kamalov <ik@adguard.com>
Date:   Tue Jun 1 10:55:09 2021 +0300

    client: check upstreams

commit 05fe6ea196a1ed9386eec25dbfbe22779fe7bcfd
Author: Vlad <v.abdulmyanov@adguard.com>
Date:   Mon May 31 19:23:35 2021 +0300

    add defaul resolvers line

commit 8d63c7df9947c9588478d1173834b42569fd8951
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Mon May 31 11:56:08 2021 +0300

    all: imp changelog

commit e3912e3b20eca9dcf90ddddaa5edb54d1e0cfe6e
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Fri May 28 20:23:05 2021 +0300

    all: add local ptr resolvers addresses output
This commit is contained in:
Eugene Burkov
2021-06-01 14:28:34 +03:00
parent e17e1f20fb
commit 1e55db408f
9 changed files with 95 additions and 26 deletions
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48
internal/dnsforward/dnsforward.go
View File

@@ -76,6 +76,7 @@ type Server struct {
ipset ipsetCtx
subnetDetector *aghnet.SubnetDetector
localResolvers *proxy.Proxy
sysResolvers aghnet.SystemResolvers
recDetector *recursionDetector
tableHostToIP hostToIPTable
@@ -154,6 +155,13 @@ func NewServer(p DNSCreateParams) (s *Server, err error) {
recDetector: newRecursionDetector(recursionTTL, cachedRecurrentReqNum),
}
// TODO(e.burkov): Enable the refresher after the actual implementation
// passes the public testing.
s.sysResolvers, err = aghnet.NewSystemResolvers(0, nil)
if err != nil {
return nil, fmt.Errorf("initializing system resolvers: %w", err)
}
if p.DHCPServer != nil {
s.dhcpServer = p.DHCPServer
s.dhcpServer.SetOnLeaseChanged(s.onDHCPLeaseChanged)
@@ -375,28 +383,11 @@ func (s *Server) collectDNSIPAddrs() (addrs []string, err error) {
return addrs[:i], nil
}
// setupResolvers initializes the resolvers for local addresses. For internal
// use only.
func (s *Server) setupResolvers(localAddrs []string) (err error) {
bootstraps := s.conf.BootstrapDNS
if len(localAddrs) == 0 {
var sysRes aghnet.SystemResolvers
// TODO(e.burkov): Enable the refresher after the actual
// implementation passes the public testing.
sysRes, err = aghnet.NewSystemResolvers(0, nil)
if err != nil {
return err
}
localAddrs = sysRes.Get()
bootstraps = nil
}
log.Debug("upstreams to resolve PTR for local addresses: %v", localAddrs)
func (s *Server) filterOurDNSAddrs(addrs []string) (filtered []string, err error) {
var ourAddrs []string
ourAddrs, err = s.collectDNSIPAddrs()
if err != nil {
return err
return nil, err
}
ourAddrsSet := aghstrings.NewSet(ourAddrs...)
@@ -405,7 +396,24 @@ func (s *Server) setupResolvers(localAddrs []string) (err error) {
// really applicable here since in case of listening on all network
// interfaces we should check the whole interface's network to cut off
// all the loopback addresses as well.
localAddrs = aghstrings.FilterOut(localAddrs, ourAddrsSet.Has)
return aghstrings.FilterOut(addrs, ourAddrsSet.Has), nil
}
// setupResolvers initializes the resolvers for local addresses. For internal
// use only.
func (s *Server) setupResolvers(localAddrs []string) (err error) {
bootstraps := s.conf.BootstrapDNS
if len(localAddrs) == 0 {
localAddrs = s.sysResolvers.Get()
bootstraps = nil
}
localAddrs, err = s.filterOurDNSAddrs(localAddrs)
if err != nil {
return err
}
log.Debug("upstreams to resolve PTR for local addresses: %v", localAddrs)
var upsConfig proxy.UpstreamConfig
upsConfig, err = proxy.ParseUpstreamsConfig(localAddrs, upstream.Options{