dnsproxy

README

dnsproxy

DNS 服务器 + 代理服务器

作为 DNS 服务器使用时

• 中国大陆的域名 通过国内 DNS 服务器查询
• gfwlist 中的域名通过代理服务器向国外 DNS 服务器查询
• 不在以上两者中的域名：先通过代理服务器向国外 DNS 服务器查询，如果得到中国大陆 IP 则再通过国内 DNS 服务器查询一次以试图获取更好的 IP 质量

作为代理服务器使用时

• 中国大陆的域名 直连
• gfwlist 中的域名通过代理服务器访问
• 不在以上两者中的域名：如果其 IP 是 中国大陆 IP 则直连，否则通过代理服务器访问

获取与安装

直接下载二进制文件

See the releases page

通过 docker 编译

$ docker build -t dnsproxy https://raw.githubusercontent.com/ARwMq9b6/dnsproxy/master/cmd/dnsproxy/Dockerfile
$ docker run -v $PWD/target:/target dnsproxy

本地编译

$ go get -d -u github.com/ARwMq9b6/dnsproxy
$ cd $GOPATH/src/github.com/ARwMq9b6/dnsproxy/cmd/dnsproxy
$ make

Documentation

Index

• Constants
• func InitGlobals(ipc ipcache, domainc domaincache, dm DomainMatcher, ...)
• func MsgExchangeOverGoogleDOH(req *dns.Msg, rt http.RoundTripper) (resp *dns.Msg, err error)
• func MsgExtractAnswer(msg *dns.Msg) (dns.RR, net.IP)
• func MsgNewReplyFromReq(req *dns.Msg, answer ...dns.RR) *dns.Msg
• func MsgSetECSWithAddr(m *dns.Msg, addr net.IP)
• func NewDnsTransport(nameserver, net string, _proxy proxy.Dialer) *dnsTransport
• func NewDomaincache(defaultExpiration, cleanupInterval time.Duration) domaincache
• func NewIpcache(defaultExpiration, cleanupInterval time.Duration) ipcache
• func RRNewFromGoogleDohRR(grr google.DNSRR) dns.RR
• func ServeDNS(laddr string) error
• func ServeProxy(laddr string, proxy, direct *gost.ProxyChain) error
• type DomainMatcher

Constants

const (
	AddrIPv4   uint8 = gosocks5.AddrIPv4
	AddrDomain       = gosocks5.AddrDomain
	AddrIPv6         = gosocks5.AddrIPv6
)

Functions

func InitGlobals

func InitGlobals(ipc ipcache, domainc domaincache,
	dm DomainMatcher, ipMatchCHN func(net.IP) bool,
	subnetLocalIP, subnetProxyIP net.IP,
	dtObedient, dtAbroad *dnsTransport)

init global vars

func MsgExchangeOverGoogleDOH

func MsgExchangeOverGoogleDOH(req *dns.Msg, rt http.RoundTripper) (resp *dns.Msg, err error)

Perform query into Google DNS over HTTPS server

func MsgExtractAnswer

func MsgExtractAnswer(msg *dns.Msg) (dns.RR, net.IP)

extract answer from dns msg FIXME: deal with name alias

func MsgNewReplyFromReq

func MsgNewReplyFromReq(req *dns.Msg, answer ...dns.RR) *dns.Msg

--- impl dns.Msg

func MsgSetECSWithAddr

func MsgSetECSWithAddr(m *dns.Msg, addr net.IP)

set edns-client-subnet ip

func NewDnsTransport

func NewDnsTransport(nameserver, net string, _proxy proxy.Dialer) *dnsTransport

func NewDomaincache

func NewDomaincache(defaultExpiration, cleanupInterval time.Duration) domaincache

--- impl domaincache

func NewIpcache

func NewIpcache(defaultExpiration, cleanupInterval time.Duration) ipcache

--- impl ipcache

func RRNewFromGoogleDohRR

func RRNewFromGoogleDohRR(grr google.DNSRR) dns.RR

Initialize a new RRGeneric from a google dns over https RR

func ServeDNS

func ServeDNS(laddr string) error

func ServeProxy

func ServeProxy(laddr string, proxy, direct *gost.ProxyChain) error

Types

type DomainMatcher

type DomainMatcher interface {
	MatchGFW(domain string) bool
	MatchObedient(domain string) bool
}

check if a domain in

• gfw list
• obedient list
• neither