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dns: log qname in error

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This commit is contained in:
nadoo 2020-04-28 12:23:21 +08:00
parent 76fddcc29c
commit c2d9c67214
5 changed files with 16 additions and 17 deletions
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8
dns/client.go
View File

@ -153,7 +153,7 @@ func (c *Client) exchange(qname string, reqBytes []byte, preferTCP bool) (
var rc net.Conn var rc net.Conn
rc, err = dialer.Dial(network, server) rc, err = dialer.Dial(network, server)
if err != nil { if err != nil {
log.F("[dns] failed to connect to server %v: %v", server, err) log.F("[dns] error in resolving %s, failed to connect to server %v: %v", qname, server, err)
continue continue
} }
defer rc.Close() defer rc.Close()
@ -172,7 +172,7 @@ func (c *Client) exchange(qname string, reqBytes []byte, preferTCP bool) (
break break
} }
log.F("[dns] failed to exchange with server %v: %v", server, err) log.F("[dns] error in resolving %s, failed to exchange with server %v: %v", qname, server, err)
} }
return server, network, dialer.Addr(), respBytes, err return server, network, dialer.Addr(), respBytes, err
@ -181,13 +181,11 @@ func (c *Client) exchange(qname string, reqBytes []byte, preferTCP bool) (
// exchangeTCP exchange with server over tcp. // exchangeTCP exchange with server over tcp.
func (c *Client) exchangeTCP(rc net.Conn, reqBytes []byte) ([]byte, error) { func (c *Client) exchangeTCP(rc net.Conn, reqBytes []byte) ([]byte, error) {
if _, err := rc.Write(reqBytes); err != nil { if _, err := rc.Write(reqBytes); err != nil {
log.F("[dns] failed to write req message: %v", err)
return nil, err return nil, err
} }
var respLen uint16 var respLen uint16
if err := binary.Read(rc, binary.BigEndian, &respLen); err != nil { if err := binary.Read(rc, binary.BigEndian, &respLen); err != nil {
log.F("[dns] failed to read response length: %v", err)
return nil, err return nil, err
} }
@ -196,7 +194,6 @@ func (c *Client) exchangeTCP(rc net.Conn, reqBytes []byte) ([]byte, error) {
_, err := io.ReadFull(rc, respBytes[2:]) _, err := io.ReadFull(rc, respBytes[2:])
if err != nil { if err != nil {
log.F("[dns] error in read respMsg %s\n", err)
return nil, err return nil, err
} }
@ -206,7 +203,6 @@ func (c *Client) exchangeTCP(rc net.Conn, reqBytes []byte) ([]byte, error) {
// exchangeUDP exchange with server over udp. // exchangeUDP exchange with server over udp.
func (c *Client) exchangeUDP(rc net.Conn, reqBytes []byte) ([]byte, error) { func (c *Client) exchangeUDP(rc net.Conn, reqBytes []byte) ([]byte, error) {
if _, err := rc.Write(reqBytes[2:]); err != nil { if _, err := rc.Write(reqBytes[2:]); err != nil {
log.F("[dns] failed to write req message: %v", err)
return nil, err return nil, err
} }

2
dns/message.go
View File

@ -15,7 +15,7 @@ import (
// Messages carried by UDP are restricted to 512 bytes (not counting the IP // Messages carried by UDP are restricted to 512 bytes (not counting the IP
// or UDP headers). Longer messages are truncated and the TC bit is set in // or UDP headers). Longer messages are truncated and the TC bit is set in
// the header. // the header.
const UDPMaxLen = 512 const UDPMaxLen = 510
// HeaderLen is the length of dns msg header. // HeaderLen is the length of dns msg header.
const HeaderLen = 12 const HeaderLen = 12

2
dns/server.go
View File

@ -147,7 +147,7 @@ func (s *Server) ServeTCP(c net.Conn) {
} }
if _, err := c.Write(respBytes); err != nil { if _, err := c.Write(respBytes); err != nil {
log.F("[dns-tcp] error in local write respBytes: %s", err) log.F("[dns-tcp] error in write respBytes: %s", err)
return return
} }
} }

7
go.mod
View File

@ -4,15 +4,16 @@ go 1.14
require ( require (
github.com/klauspost/cpuid v1.2.3 // indirect github.com/klauspost/cpuid v1.2.3 // indirect
github.com/klauspost/reedsolomon v1.9.4 // indirect
github.com/mzz2017/shadowsocksR v0.0.0-20200126130347-721f53a7b15a github.com/mzz2017/shadowsocksR v0.0.0-20200126130347-721f53a7b15a
github.com/nadoo/conflag v0.2.3 github.com/nadoo/conflag v0.2.3
github.com/nadoo/go-shadowsocks2 v0.1.2 github.com/nadoo/go-shadowsocks2 v0.1.2
github.com/pkg/errors v0.9.1 // indirect github.com/pkg/errors v0.9.1 // indirect
github.com/tjfoc/gmsm v1.3.0 // indirect github.com/tjfoc/gmsm v1.3.0 // indirect
github.com/xtaci/kcp-go/v5 v5.5.12 github.com/xtaci/kcp-go/v5 v5.5.12
golang.org/x/crypto v0.0.0-20200420201142-3c4aac89819a golang.org/x/crypto v0.0.0-20200427165652-729f1e841bcc
golang.org/x/net v0.0.0-20200421231249-e086a090c8fd // indirect golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0 // indirect
golang.org/x/sys v0.0.0-20200420163511-1957bb5e6d1f // indirect golang.org/x/sys v0.0.0-20200427175716-29b57079015a // indirect
) )
// Replace dependency modules with local developing copy // Replace dependency modules with local developing copy

14
go.sum
View File

@ -17,6 +17,8 @@ github.com/klauspost/cpuid v1.2.3 h1:CCtW0xUnWGVINKvE/WWOYKdsPV6mawAtvQuSl8guwQs
github.com/klauspost/cpuid v1.2.3/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek= github.com/klauspost/cpuid v1.2.3/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek=
github.com/klauspost/reedsolomon v1.9.3 h1:N/VzgeMfHmLc+KHMD1UL/tNkfXAt8FnUqlgXGIduwAY= github.com/klauspost/reedsolomon v1.9.3 h1:N/VzgeMfHmLc+KHMD1UL/tNkfXAt8FnUqlgXGIduwAY=
github.com/klauspost/reedsolomon v1.9.3/go.mod h1:CwCi+NUr9pqSVktrkN+Ondf06rkhYZ/pcNv7fu+8Un4= github.com/klauspost/reedsolomon v1.9.3/go.mod h1:CwCi+NUr9pqSVktrkN+Ondf06rkhYZ/pcNv7fu+8Un4=
github.com/klauspost/reedsolomon v1.9.4 h1:FB9jDBGqUNyhUg4Gszz384ulFqVSc61Pdap+HRPgnSo=
github.com/klauspost/reedsolomon v1.9.4/go.mod h1:CwCi+NUr9pqSVktrkN+Ondf06rkhYZ/pcNv7fu+8Un4=
github.com/mzz2017/shadowsocksR v0.0.0-20200126130347-721f53a7b15a h1:lM2cQgk1E5mNMUBw5cdE5922waAyan6jlMpbjRxfEas= github.com/mzz2017/shadowsocksR v0.0.0-20200126130347-721f53a7b15a h1:lM2cQgk1E5mNMUBw5cdE5922waAyan6jlMpbjRxfEas=
github.com/mzz2017/shadowsocksR v0.0.0-20200126130347-721f53a7b15a/go.mod h1:1SJEvxD2Y+N7SK2NpCC4wSatvfGGTUo2rhPdthUFsCU= github.com/mzz2017/shadowsocksR v0.0.0-20200126130347-721f53a7b15a/go.mod h1:1SJEvxD2Y+N7SK2NpCC4wSatvfGGTUo2rhPdthUFsCU=
github.com/nadoo/conflag v0.2.2 h1:xywuyaevdBnA3+4g9S11ng+Nby725WN1LXargWnAXpM= github.com/nadoo/conflag v0.2.2 h1:xywuyaevdBnA3+4g9S11ng+Nby725WN1LXargWnAXpM=
@ -58,13 +60,13 @@ golang.org/x/crypto v0.0.0-20191010185427-af544f31c8ac/go.mod h1:yigFU9vqHzYiE8U
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto= golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.0.0-20191219195013-becbf705a915/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto= golang.org/x/crypto v0.0.0-20191219195013-becbf705a915/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.0.0-20200420201142-3c4aac89819a h1:y6sBfNd1b9Wy08a6K1Z1DZc4aXABUN5TKjkYhz7UKmo= golang.org/x/crypto v0.0.0-20200427165652-729f1e841bcc h1:ZGI/fILM2+ueot/UixBSoj9188jCAxVHEZEGhqq67I4=
golang.org/x/crypto v0.0.0-20200420201142-3c4aac89819a/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto= golang.org/x/crypto v0.0.0-20200427165652-729f1e841bcc/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20191014212845-da9a3fd4c582/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20191014212845-da9a3fd4c582/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200421231249-e086a090c8fd h1:QPwSajcTUrFriMF1nJ3XzgoqakqQEsnZf9LdXdi2nkI= golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0 h1:Jcxah/M+oLZ/R4/z5RzfPzGbPXnVDPkEDtf2JnuxN+U=
golang.org/x/net v0.0.0-20200421231249-e086a090c8fd/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190902133755-9109b7679e13/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190902133755-9109b7679e13/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@ -73,8 +75,8 @@ golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7w
golang.org/x/sys v0.0.0-20191020212454-3e7259c5e7c2/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20191020212454-3e7259c5e7c2/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200420163511-1957bb5e6d1f h1:gWF768j/LaZugp8dyS4UwsslYCYz9XgFxvlgsn0n9H8= golang.org/x/sys v0.0.0-20200427175716-29b57079015a h1:08u6b1caTT9MQY4wSbmsd4Ulm6DmgNYnbImBuZjGJow=
golang.org/x/sys v0.0.0-20200420163511-1957bb5e6d1f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200427175716-29b57079015a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=