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Pull request: 3157 excessive ptrs

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Merge in DNS/adguard-home from 3157-excessive-ptrs to master

Updates #3157.

Squashed commit of the following:

commit 6803988240dca2f147bb80a5b3f78d7749d2fa14
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Apr 19 14:50:01 2022 +0300

    aghnet: and again

commit 1a7f4d1dbc8fd4d3ae620349917526a75fa71b47
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Apr 19 14:49:20 2022 +0300

    aghnet: docs again

commit d88da1fc7135f3cd03aff10b02d9957c8ffdfd30
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Apr 19 14:47:36 2022 +0300

    aghnet: imp docs

commit c45dbc7800e882c6c4110aab640c32b03046f89a
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Apr 19 14:41:19 2022 +0300

    aghnet: keep alphabetical order

commit b61781785d096ef43f60fb4f1905a4ed3cdf7c68
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Apr 19 13:50:56 2022 +0300

    aghnet: imp code quality

commit 578dbd71ed2f2089c69343d7d4bf8bbc29150ace
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Apr 12 17:02:38 2022 +0300

    aghnet: imp arp container
This commit is contained in:
Eugene Burkov 2022-04-19 15:01:49 +03:00
parent 57171f0a61
commit 12ee287d0b
8 changed files with 46 additions and 34 deletions
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5
CHANGELOG.md
View file

@ -87,10 +87,15 @@ In this release, the schema version has changed from 12 to 13.
- Go 1.17 support. v0.109.0 will require at least Go 1.18 to build.
### Fixed
- ARP tables refreshing process causing excessive PTR requests ([#3157]).
[#1730]: https://github.com/AdguardTeam/AdGuardHome/issues/1730
[#2993]: https://github.com/AdguardTeam/AdGuardHome/issues/2993
[#3057]: https://github.com/AdguardTeam/AdGuardHome/issues/3057
[#3142]: https://github.com/AdguardTeam/AdGuardHome/issues/3142
[#3157]: https://github.com/AdguardTeam/AdGuardHome/issues/3157
[#3367]: https://github.com/AdguardTeam/AdGuardHome/issues/3367
[#3381]: https://github.com/AdguardTeam/AdGuardHome/issues/3381
[#3503]: https://github.com/AdguardTeam/AdGuardHome/issues/3503

13
internal/aghnet/arpdb_bsd.go
View file

@ -13,19 +13,24 @@ import (
"github.com/AdguardTeam/golibs/netutil"
)
func newARPDB() *cmdARPDB {
func newARPDB() (arp *cmdARPDB) {
return &cmdARPDB{
parse: parseArpA,
ns: &neighs{
mu: &sync.RWMutex{},
ns: make([]Neighbor, 0),
},
cmd: "arp",
args: []string{"-a"},
cmd: "arp",
// Use -n flag to avoid resolving the hostnames of the neighbors. By
// default ARP attempts to resolve the hostnames via DNS. See man 8
// arp.
//
// See also https://github.com/AdguardTeam/AdGuardHome/issues/3157.
args: []string{"-a", "-n"},
}
}
// parseArpA parses the output of the "arp -a" command on macOS and FreeBSD.
// parseArpA parses the output of the "arp -a -n" command on macOS and FreeBSD.
// The expected input format:
//
// host.name (192.168.0.1) at ff:ff:ff:ff:ff:ff on en0 ifscope [ethernet]

19
internal/aghnet/arpdb_linux.go
View file

@ -38,12 +38,17 @@ func newARPDB() (arp *arpdbs) {
fsys: rootDirFS,
filename: "proc/net/arp",
},
// Then, try "arp -a".
// Then, try "arp -a -n".
&cmdARPDB{
parse: parseF,
ns: ns,
cmd: "arp",
args: []string{"-a"},
// Use -n flag to avoid resolving the hostnames of the neighbors.
// By default ARP attempts to resolve the hostnames via DNS. See
// man 8 arp.
//
// See also https://github.com/AdguardTeam/AdGuardHome/issues/3157.
args: []string{"-a", "-n"},
},
// Finally, try "ip neigh".
&cmdARPDB{
@ -109,11 +114,11 @@ func (arp *fsysARPDB) Neighbors() (ns []Neighbor) {
return arp.ns.clone()
}
// parseArpAWrt parses the output of the "arp -a" command on OpenWrt. The
// parseArpAWrt parses the output of the "arp -a -n" command on OpenWrt. The
// expected input format:
//
// IP address HW type Flags HW address Mask Device
// 192.168.11.98 0x1 0x2 5a:92:df:a9:7e:28 * wan
// IP address HW type Flags HW address Mask Device
// 192.168.11.98 0x1 0x2 5a:92:df:a9:7e:28 * wan
//
func parseArpAWrt(sc *bufio.Scanner, lenHint int) (ns []Neighbor) {
if !sc.Scan() {
@ -153,8 +158,8 @@ func parseArpAWrt(sc *bufio.Scanner, lenHint int) (ns []Neighbor) {
return ns
}
// parseArpA parses the output of the "arp -a" command on Linux. The expected
// input format:
// parseArpA parses the output of the "arp -a -n" command on Linux. The
// expected input format:
//
// hostname (192.168.1.1) at ab:cd:ef:ab:cd:ef [ether] on enp0s3
//

15
internal/aghnet/arpdb_openbsd.go
View file

@ -12,20 +12,25 @@ import (
"github.com/AdguardTeam/golibs/log"
)
func newARPDB() *cmdARPDB {
func newARPDB() (arp *cmdARPDB) {
return &cmdARPDB{
parse: parseArpA,
ns: &neighs{
mu: &sync.RWMutex{},
ns: make([]Neighbor, 0),
},
cmd: "arp",
args: []string{"-a"},
cmd: "arp",
// Use -n flag to avoid resolving the hostnames of the neighbors. By
// default ARP attempts to resolve the hostnames via DNS. See man 8
// arp.
//
// See also https://github.com/AdguardTeam/AdGuardHome/issues/3157.
args: []string{"-a", "-n"},
}
}
// parseArpA parses the output of the "arp -a" command on OpenBSD. The expected
// input format:
// parseArpA parses the output of the "arp -a -n" command on OpenBSD. The
// expected input format:
//
// Host Ethernet Address Netif Expire Flags
// 192.168.1.1 ab:cd:ef:ab:cd:ef em0 19m59s

2
internal/aghnet/arpdb_windows.go
View file

@ -10,7 +10,7 @@ import (
"sync"
)
func newARPDB() *cmdARPDB {
func newARPDB() (arp *cmdARPDB) {
return &cmdARPDB{
parse: parseArpA,
ns: &neighs{

1
internal/dnsforward/dns.go
View file

@ -135,7 +135,6 @@ func (s *Server) processRecursion(dctx *dnsContext) (rc resultCode) {
pctx.Res = s.genNXDomain(pctx.Req)
return resultCodeFinish
}
return resultCodeSuccess

14
internal/dnsforward/recursiondetector_test.go
View file

@ -83,7 +83,7 @@ func TestRecursionDetector_Suspect(t *testing.T) {
testCases := []struct {
name string
msg dns.Msg
want bool
want int
}{{
name: "simple",
msg: dns.Msg{
@ -95,24 +95,18 @@ func TestRecursionDetector_Suspect(t *testing.T) {
Qtype: dns.TypeA,
}},
},
want: true,
want: 1,
}, {
name: "unencumbered",
msg: dns.Msg{},
want: false,
want: 0,
}}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
t.Cleanup(rd.clear)
rd.add(tc.msg)
if tc.want {
assert.Equal(t, 1, rd.recentRequests.Stats().Count)
} else {
assert.Zero(t, rd.recentRequests.Stats().Count)
}
assert.Equal(t, tc.want, rd.recentRequests.Stats().Count)
})
}
}

11
internal/home/rdns.go
View file

@ -16,18 +16,17 @@ type RDNS struct {
exchanger dnsforward.RDNSExchanger
clients *clientsContainer
// usePrivate is used to store the state of current private RDNS
// resolving settings and to react to it's changes.
// usePrivate is used to store the state of current private RDNS resolving
// settings and to react to it's changes.
usePrivate uint32
// ipCh used to pass client's IP to rDNS workerLoop.
ipCh chan net.IP
// ipCache caches the IP addresses to be resolved by rDNS. The resolved
// address stays here while it's inside clients. After leaving clients
// the address will be resolved once again. If the address couldn't be
// resolved, cache prevents further attempts to resolve it for some
// time.
// address stays here while it's inside clients. After leaving clients the
// address will be resolved once again. If the address couldn't be
// resolved, cache prevents further attempts to resolve it for some time.
ipCache cache.Cache
}