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dns: added new config dnsnoaaaa to filter AAAA response, default to false

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nadoo 2022-01-20 21:59:40 +08:00
parent 27de61a59d
commit 2754fdeb60
4 changed files with 9 additions and 3 deletions
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1
config.go
View File

@ -73,6 +73,7 @@ func parseConfig() *Config {
flag.IntVar(&conf.DNSConfig.MinTTL, "dnsminttl", 0, "minimum TTL value for entries in the CACHE(seconds)")
flag.IntVar(&conf.DNSConfig.CacheSize, "dnscachesize", 4096, "size of CACHE")
flag.BoolVar(&conf.DNSConfig.CacheLog, "dnscachelog", false, "show query log of dns cache")
flag.BoolVar(&conf.DNSConfig.NoAAAA, "dnsnoaaaa", false, "disable AAAA query")
flag.StringSliceUniqVar(&conf.DNSConfig.Records, "dnsrecord", nil, "custom dns record, format: domain/ip")
// service configs

5
dns/client.go
View File

@ -27,6 +27,7 @@ type Config struct {
AlwaysTCP bool
CacheSize int
CacheLog bool
NoAAAA bool
}
// Client is a dns client struct.
@ -65,6 +66,10 @@ func (c *Client) Exchange(reqBytes []byte, clientAddr string, preferTCP bool) ([
return nil, err
}
if c.config.NoAAAA && req.Question.QTYPE == QTypeAAAA {
return nil, errors.New("AAAA query is disabled, qname: " + req.Question.QNAME)
}
if req.Question.QTYPE == QTypeA || req.Question.QTYPE == QTypeAAAA {
if v, expired := c.cache.Get(qKey(req.Question)); len(v) > 2 {
v = valCopy(v)

2
go.mod
View File

@ -7,7 +7,7 @@ require (
github.com/dgryski/go-camellia v0.0.0-20191119043421-69a8a13fb23d
github.com/dgryski/go-idea v0.0.0-20170306091226-d2fb45a411fb
github.com/dgryski/go-rc2 v0.0.0-20150621095337-8a9021637152
github.com/insomniacslk/dhcp v0.0.0-20211214070828-5297eed8f489
github.com/insomniacslk/dhcp v0.0.0-20220119180841-3c283ff8b7dd
github.com/nadoo/conflag v0.2.3
github.com/nadoo/ipset v0.3.0
github.com/xtaci/kcp-go/v5 v5.6.1

4
go.sum
View File

@ -39,8 +39,8 @@ github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
github.com/hugelgupf/socketpair v0.0.0-20190730060125-05d35a94e714 h1:/jC7qQFrv8CrSJVmaolDVOxTfS9kc36uB6H40kdbQq8=
github.com/hugelgupf/socketpair v0.0.0-20190730060125-05d35a94e714/go.mod h1:2Goc3h8EklBH5mspfHFxBnEoURQCGzQQH1ga9Myjvis=
github.com/insomniacslk/dhcp v0.0.0-20211214070828-5297eed8f489 h1:jhdHqd7DxBrzfuFSoPxjD6nUVaV/1RIn9aHA0WCf/as=
github.com/insomniacslk/dhcp v0.0.0-20211214070828-5297eed8f489/go.mod h1:h+MxyHxRg9NH3terB1nfRIUaQEcI0XOVkdR9LNBlp8E=
github.com/insomniacslk/dhcp v0.0.0-20220119180841-3c283ff8b7dd h1:efcJu2Vzz6DoSq245deWNzTz6l/gsqdphm3FjmI88/g=
github.com/insomniacslk/dhcp v0.0.0-20220119180841-3c283ff8b7dd/go.mod h1:h+MxyHxRg9NH3terB1nfRIUaQEcI0XOVkdR9LNBlp8E=
github.com/jsimonetti/rtnetlink v0.0.0-20190606172950-9527aa82566a/go.mod h1:Oz+70psSo5OFh8DBl0Zv2ACw7Esh6pPUphlvZG9x7uw=
github.com/jsimonetti/rtnetlink v0.0.0-20200117123717-f846d4f6c1f4/go.mod h1:WGuG/smIU4J/54PblvSbh+xvCZmpJnFgr3ds6Z55XMQ=
github.com/jsimonetti/rtnetlink v0.0.0-20201009170750-9c6f07d100c1/go.mod h1:hqoO/u39cqLeBLebZ8fWdE96O7FxrAsRYhnVOdgHxok=