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dns: send nil response instead of dropping it when dnsnoaaaa is enabled

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This commit is contained in:
nadoo 2022-01-22 13:13:20 +08:00
parent 2754fdeb60
commit a919ac3469
4 changed files with 16 additions and 12 deletions
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7
dns/client.go
View File

@ -67,7 +67,8 @@ func (c *Client) Exchange(reqBytes []byte, clientAddr string, preferTCP bool) ([
} }
if c.config.NoAAAA && req.Question.QTYPE == QTypeAAAA { if c.config.NoAAAA && req.Question.QTYPE == QTypeAAAA {
return nil, errors.New("AAAA query is disabled, qname: " + req.Question.QNAME) reqBytes[2] |= uint8(Response) << 7
return reqBytes, nil
} }
if req.Question.QTYPE == QTypeA || req.Question.QTYPE == QTypeAAAA { if req.Question.QTYPE == QTypeA || req.Question.QTYPE == QTypeAAAA {
@ -283,7 +284,7 @@ func (c *Client) AddHandler(h AnswerHandler) {
func (c *Client) AddRecord(record string) error { func (c *Client) AddRecord(record string) error {
r := strings.Split(record, "/") r := strings.Split(record, "/")
domain, ip := r[0], r[1] domain, ip := r[0], r[1]
m, err := c.MakeResponse(domain, ip, uint32(c.config.MaxTTL)) m, err := MakeResponse(domain, ip, uint32(c.config.MaxTTL))
if err != nil { if err != nil {
return err return err
} }
@ -303,7 +304,7 @@ func (c *Client) AddRecord(record string) error {
// MakeResponse makes a dns response message for the given domain and ip address. // MakeResponse makes a dns response message for the given domain and ip address.
// Note: you should make sure ttl > 0. // Note: you should make sure ttl > 0.
func (c *Client) MakeResponse(domain, ip string, ttl uint32) (*Message, error) { func MakeResponse(domain, ip string, ttl uint32) (*Message, error) {
ipb := net.ParseIP(ip) ipb := net.ParseIP(ip)
if ipb == nil { if ipb == nil {
return nil, errors.New("MakeResponse: invalid ip format") return nil, errors.New("MakeResponse: invalid ip format")

4
dns/server.go
View File

@ -80,13 +80,13 @@ func (s *Server) ServePacket(pc net.PacketConn, caddr net.Addr, reqBytes []byte)
}() }()
if err != nil { if err != nil {
log.F("[dns] error in exchange: %s", err) log.F("[dns] error in exchange for %s: %s", caddr, err)
return return
} }
_, err = pc.WriteTo(respBytes, caddr) _, err = pc.WriteTo(respBytes, caddr)
if err != nil { if err != nil {
log.F("[dns] error in local write: %s", err) log.F("[dns] error in local write to %s: %s", caddr, err)
return return
} }
} }

4
go.mod
View File

@ -9,7 +9,7 @@ require (
github.com/dgryski/go-rc2 v0.0.0-20150621095337-8a9021637152 github.com/dgryski/go-rc2 v0.0.0-20150621095337-8a9021637152
github.com/insomniacslk/dhcp v0.0.0-20220119180841-3c283ff8b7dd github.com/insomniacslk/dhcp v0.0.0-20220119180841-3c283ff8b7dd
github.com/nadoo/conflag v0.2.3 github.com/nadoo/conflag v0.2.3
github.com/nadoo/ipset v0.3.0 github.com/nadoo/ipset v0.4.0
github.com/xtaci/kcp-go/v5 v5.6.1 github.com/xtaci/kcp-go/v5 v5.6.1
golang.org/x/crypto v0.0.0-20220112180741-5e0467b6c7ce golang.org/x/crypto v0.0.0-20220112180741-5e0467b6c7ce
golang.org/x/sys v0.0.0-20220114195835-da31bd327af9 golang.org/x/sys v0.0.0-20220114195835-da31bd327af9
@ -26,7 +26,7 @@ require (
github.com/templexxx/xorsimd v0.4.1 // indirect github.com/templexxx/xorsimd v0.4.1 // indirect
github.com/tjfoc/gmsm v1.4.1 // indirect github.com/tjfoc/gmsm v1.4.1 // indirect
github.com/u-root/uio v0.0.0-20210528151154-e40b768296a7 // indirect github.com/u-root/uio v0.0.0-20210528151154-e40b768296a7 // indirect
golang.org/x/net v0.0.0-20220114011407-0dd24b26b47d // indirect golang.org/x/net v0.0.0-20220121210141-e204ce36a2ba // indirect
) )
// Replace dependency modules with local developing copy // Replace dependency modules with local developing copy

13
go.sum
View File

@ -68,8 +68,8 @@ github.com/mdlayher/raw v0.0.0-20211126142749-4eae47f3d54b/go.mod h1:7EpbotpCmVZ
github.com/mmcloughlin/avo v0.0.0-20200803215136-443f81d77104/go.mod h1:wqKykBG2QzQDJEzvRkcS8x6MiSJkF52hXZsXcjaB3ls= github.com/mmcloughlin/avo v0.0.0-20200803215136-443f81d77104/go.mod h1:wqKykBG2QzQDJEzvRkcS8x6MiSJkF52hXZsXcjaB3ls=
github.com/nadoo/conflag v0.2.3 h1:/+rTaN0bHTIiQbPl1WZK78JRoqjlNqJ9Zf05ep0o5jI= github.com/nadoo/conflag v0.2.3 h1:/+rTaN0bHTIiQbPl1WZK78JRoqjlNqJ9Zf05ep0o5jI=
github.com/nadoo/conflag v0.2.3/go.mod h1:dzFfDUpXdr2uS2oV+udpy5N2vfNOu/bFzjhX1WI52co= github.com/nadoo/conflag v0.2.3/go.mod h1:dzFfDUpXdr2uS2oV+udpy5N2vfNOu/bFzjhX1WI52co=
github.com/nadoo/ipset v0.3.0 h1:TgULgp4s2PI3ItoCykDzMp8R49fRhMUNoUUEahERr5o= github.com/nadoo/ipset v0.4.0 h1:FBC4F6I0QP9+E2cYDelJfvPX4J7pGuml3ZKcAaplNQ4=
github.com/nadoo/ipset v0.3.0/go.mod h1:ugJe3mH5N1UNQbXayGJnLEMALeiwCJYo49Wg4MnZTHU= github.com/nadoo/ipset v0.4.0/go.mod h1:x/lqgubO+J0T1KnuzSrV35RzlcERchuzPFYhDg/kMaI=
github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4= github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0= github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
@ -130,8 +130,8 @@ golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81R
golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU= golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU= golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y= golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
golang.org/x/net v0.0.0-20220114011407-0dd24b26b47d h1:1n1fc535VhN8SYtD4cDUyNlfpAF2ROMM9+11equK3hs= golang.org/x/net v0.0.0-20220121210141-e204ce36a2ba h1:6u6sik+bn/y7vILcYkK3iwTBWN7WtBvB0+SZswQnbf8=
golang.org/x/net v0.0.0-20220114011407-0dd24b26b47d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y= golang.org/x/net v0.0.0-20220121210141-e204ce36a2ba/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U= golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@ -157,13 +157,16 @@ golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7w
golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220114195835-da31bd327af9 h1:XfKQ4OlFl8okEOr5UvAqFRVj8pY/4yfcXrddB8qAbU0= golang.org/x/sys v0.0.0-20220114195835-da31bd327af9 h1:XfKQ4OlFl8okEOr5UvAqFRVj8pY/4yfcXrddB8qAbU0=
golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 h1:v+OssWQX+hTHEmOBgwxdZxK4zHq3yOs8F9J7mk0PY8E=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo= golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY= golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=