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Feature: move hosts to the top

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This commit is contained in:
Dreamacro 2019-09-11 17:00:55 +08:00
parent 16e3090ee8
commit 96a4abf46c
6 changed files with 164 additions and 122 deletions
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53
config/config.go
View File

@ -44,7 +44,6 @@ type DNS struct {
IPv6 bool `yaml:"ipv6"`
NameServer []dns.NameServer `yaml:"nameserver"`
Fallback []dns.NameServer `yaml:"fallback"`
Hosts *trie.Trie `yaml:"-"`
Listen string `yaml:"listen"`
EnhancedMode dns.EnhancedMode `yaml:"enhanced-mode"`
FakeIPRange *fakeip.Pool
@ -60,20 +59,20 @@ type Config struct {
General *General
DNS *DNS
Experimental *Experimental
Hosts *trie.Trie
Rules []C.Rule
Users []auth.AuthUser
Proxies map[string]C.Proxy
}
type rawDNS struct {
Enable bool `yaml:"enable"`
IPv6 bool `yaml:"ipv6"`
NameServer []string `yaml:"nameserver"`
Hosts map[string]string `yaml:"hosts"`
Fallback []string `yaml:"fallback"`
Listen string `yaml:"listen"`
EnhancedMode dns.EnhancedMode `yaml:"enhanced-mode"`
FakeIPRange string `yaml:"fake-ip-range"`
Enable bool `yaml:"enable"`
IPv6 bool `yaml:"ipv6"`
NameServer []string `yaml:"nameserver"`
Fallback []string `yaml:"fallback"`
Listen string `yaml:"listen"`
EnhancedMode dns.EnhancedMode `yaml:"enhanced-mode"`
FakeIPRange string `yaml:"fake-ip-range"`
}
type rawConfig struct {
@ -89,6 +88,7 @@ type rawConfig struct {
ExternalUI string `yaml:"external-ui"`
Secret string `yaml:"secret"`
Hosts map[string]string `yaml:"hosts"`
DNS rawDNS `yaml:"dns"`
Experimental Experimental `yaml:"experimental"`
Proxy []map[string]interface{} `yaml:"Proxy"`
@ -135,6 +135,7 @@ func readConfig(path string) (*rawConfig, error) {
Mode: T.Rule,
Authentication: []string{},
LogLevel: log.INFO,
Hosts: map[string]string{},
Rule: []string{},
Proxy: []map[string]interface{}{},
ProxyGroup: []map[string]interface{}{},
@ -144,7 +145,6 @@ func readConfig(path string) (*rawConfig, error) {
DNS: rawDNS{
Enable: false,
FakeIPRange: "198.18.0.1/16",
Hosts: map[string]string{},
},
}
err = yaml.Unmarshal([]byte(data), &rawConfig)
@ -185,6 +185,12 @@ func Parse(path string) (*Config, error) {
}
config.DNS = dnsCfg
hosts, err := parseHosts(rawCfg)
if err != nil {
return nil, err
}
config.Hosts = hosts
config.Users = parseAuthentication(rawCfg.Authentication)
return config, nil
@ -460,6 +466,21 @@ func parseRules(cfg *rawConfig, proxies map[string]C.Proxy) ([]C.Rule, error) {
return rules, nil
}
func parseHosts(cfg *rawConfig) (*trie.Trie, error) {
tree := trie.New()
if len(cfg.Hosts) != 0 {
for domain, ipStr := range cfg.Hosts {
ip := net.ParseIP(ipStr)
if ip == nil {
return nil, fmt.Errorf("%s is not a valid IP", ipStr)
}
tree.Insert(domain, ip)
}
}
return tree, nil
}
func hostWithDefaultPort(host string, defPort string) (string, error) {
if !strings.Contains(host, ":") {
host += ":"
@ -544,18 +565,6 @@ func parseDNS(cfg rawDNS) (*DNS, error) {
return nil, err
}
if len(cfg.Hosts) != 0 {
tree := trie.New()
for domain, ipStr := range cfg.Hosts {
ip := net.ParseIP(ipStr)
if ip == nil {
return nil, fmt.Errorf("%s is not a valid IP", ipStr)
}
tree.Insert(domain, ip)
}
dnsCfg.Hosts = tree
}
if cfg.EnhancedMode == dns.FAKEIP {
_, ipnet, err := net.ParseCIDR(cfg.FakeIPRange)
if err != nil {

66
dns/iputil.go
View File

@ -9,8 +9,74 @@ var (
errIPNotFound = errors.New("cannot found ip")
)
// ResolveIPv4 with a host, return ipv4
func ResolveIPv4(host string) (net.IP, error) {
if node := DefaultHosts.Search(host); node != nil {
if ip := node.Data.(net.IP).To4(); ip != nil {
return ip, nil
}
}
ip := net.ParseIP(host)
if ip4 := ip.To4(); ip4 != nil {
return ip4, nil
}
if DefaultResolver != nil {
return DefaultResolver.ResolveIPv4(host)
}
ipAddrs, err := net.LookupIP(host)
if err != nil {
return nil, err
}
for _, ip := range ipAddrs {
if ip4 := ip.To4(); ip4 != nil {
return ip4, nil
}
}
return nil, errIPNotFound
}
// ResolveIPv6 with a host, return ipv6
func ResolveIPv6(host string) (net.IP, error) {
if node := DefaultHosts.Search(host); node != nil {
if ip := node.Data.(net.IP).To16(); ip != nil {
return ip, nil
}
}
ip := net.ParseIP(host)
if ip6 := ip.To16(); ip6 != nil {
return ip6, nil
}
if DefaultResolver != nil {
return DefaultResolver.ResolveIPv6(host)
}
ipAddrs, err := net.LookupIP(host)
if err != nil {
return nil, err
}
for _, ip := range ipAddrs {
if ip6 := ip.To16(); ip6 != nil {
return ip6, nil
}
}
return nil, errIPNotFound
}
// ResolveIP with a host, return ip
func ResolveIP(host string) (net.IP, error) {
if node := DefaultHosts.Search(host); node != nil {
return node.Data.(net.IP), nil
}
if DefaultResolver != nil {
if DefaultResolver.ipv6 {
return DefaultResolver.ResolveIP(host)

105
dns/middleware.go
View File

@ -1,8 +1,6 @@
package dns
import (
"fmt"
"net"
"strings"
"github.com/Dreamacro/clash/component/fakeip"
@ -12,34 +10,40 @@ import (
)
type handler func(w D.ResponseWriter, r *D.Msg)
type middleware func(next handler) handler
func withFakeIP(pool *fakeip.Pool) handler {
return func(w D.ResponseWriter, r *D.Msg) {
q := r.Question[0]
host := strings.TrimRight(q.Name, ".")
func withFakeIP(fakePool *fakeip.Pool) middleware {
return func(next handler) handler {
return func(w D.ResponseWriter, r *D.Msg) {
q := r.Question[0]
if q.Qtype != D.TypeA && q.Qtype != D.TypeAAAA {
next(w, r)
return
}
rr := &D.A{}
rr.Hdr = D.RR_Header{Name: q.Name, Rrtype: D.TypeA, Class: D.ClassINET, Ttl: dnsDefaultTTL}
ip := pool.Lookup(host)
rr.A = ip
msg := r.Copy()
msg.Answer = []D.RR{rr}
host := strings.TrimRight(q.Name, ".")
setMsgTTL(msg, 1)
msg.SetReply(r)
w.WriteMsg(msg)
return
rr := &D.A{}
rr.Hdr = D.RR_Header{Name: q.Name, Rrtype: D.TypeA, Class: D.ClassINET, Ttl: dnsDefaultTTL}
ip := fakePool.Lookup(host)
rr.A = ip
msg := r.Copy()
msg.Answer = []D.RR{rr}
setMsgTTL(msg, 1)
msg.SetReply(r)
w.WriteMsg(msg)
return
}
}
}
func withResolver(resolver *Resolver) handler {
return func(w D.ResponseWriter, r *D.Msg) {
msg, err := resolver.Exchange(r)
if err != nil {
q := r.Question[0]
qString := fmt.Sprintf("%s %s %s", q.Name, D.Class(q.Qclass).String(), D.Type(q.Qtype).String())
log.Debugln("[DNS Server] Exchange %s failed: %v", qString, err)
log.Debugln("[DNS Server] Exchange %s failed: %v", q.String(), err)
D.HandleFailed(w, r)
return
}
@ -49,64 +53,23 @@ func withResolver(resolver *Resolver) handler {
}
}
func withHost(resolver *Resolver, next handler) handler {
hosts := resolver.hosts
if hosts == nil {
panic("dns/withHost: hosts should not be nil")
func compose(middlewares []middleware, endpoint handler) handler {
length := len(middlewares)
h := endpoint
for i := length - 1; i >= 0; i-- {
middleware := middlewares[i]
h = middleware(h)
}
return func(w D.ResponseWriter, r *D.Msg) {
q := r.Question[0]
if q.Qtype != D.TypeA && q.Qtype != D.TypeAAAA {
next(w, r)
return
}
domain := strings.TrimRight(q.Name, ".")
host := hosts.Search(domain)
if host == nil {
next(w, r)
return
}
ip := host.Data.(net.IP)
if q.Qtype == D.TypeAAAA && ip.To16() == nil {
next(w, r)
return
} else if q.Qtype == D.TypeA && ip.To4() == nil {
next(w, r)
return
}
var rr D.RR
if q.Qtype == D.TypeAAAA {
record := &D.AAAA{}
record.Hdr = D.RR_Header{Name: q.Name, Rrtype: D.TypeAAAA, Class: D.ClassINET, Ttl: dnsDefaultTTL}
record.AAAA = ip
rr = record
} else {
record := &D.A{}
record.Hdr = D.RR_Header{Name: q.Name, Rrtype: D.TypeA, Class: D.ClassINET, Ttl: dnsDefaultTTL}
record.A = ip
rr = record
}
msg := r.Copy()
msg.Answer = []D.RR{rr}
msg.SetReply(r)
w.WriteMsg(msg)
return
}
return h
}
func newHandler(resolver *Resolver) handler {
middlewares := []middleware{}
if resolver.IsFakeIP() {
return withFakeIP(resolver.pool)
middlewares = append(middlewares, withFakeIP(resolver.pool))
}
if resolver.hosts != nil {
return withHost(resolver, withResolver(resolver))
}
return withResolver(resolver)
return compose(middlewares, withResolver(resolver))
}

48
dns/resolver.go
View File

@ -21,8 +21,11 @@ import (
)
var (
// DefaultResolver aim to resolve ip with host
// DefaultResolver aim to resolve ip
DefaultResolver *Resolver
// DefaultHosts aim to resolve hosts
DefaultHosts = trie.New()
)
var (
@ -46,7 +49,6 @@ type Resolver struct {
ipv6 bool
mapping bool
fakeip bool
hosts *trie.Trie
pool *fakeip.Pool
fallback []resolver
main []resolver
@ -56,11 +58,6 @@ type Resolver struct {
// ResolveIP request with TypeA and TypeAAAA, priority return TypeAAAA
func (r *Resolver) ResolveIP(host string) (ip net.IP, err error) {
ip = net.ParseIP(host)
if ip != nil {
return ip, nil
}
ch := make(chan net.IP)
go func() {
defer close(ch)
@ -89,26 +86,12 @@ func (r *Resolver) ResolveIP(host string) (ip net.IP, err error) {
// ResolveIPv4 request with TypeA
func (r *Resolver) ResolveIPv4(host string) (ip net.IP, err error) {
ip = net.ParseIP(host)
if ip != nil {
return ip, nil
}
return r.resolveIP(host, D.TypeA)
}
query := &D.Msg{}
query.SetQuestion(D.Fqdn(host), D.TypeA)
msg, err := r.Exchange(query)
if err != nil {
return nil, err
}
ips := r.msgToIP(msg)
if len(ips) == 0 {
return nil, errIPNotFound
}
ip = ips[0]
return
// ResolveIPv6 request with TypeAAAA
func (r *Resolver) ResolveIPv6(host string) (ip net.IP, err error) {
return r.resolveIP(host, D.TypeAAAA)
}
// Exchange a batch of dns request, and it use cache
@ -232,6 +215,17 @@ func (r *Resolver) fallbackExchange(m *D.Msg) (msg *D.Msg, err error) {
}
func (r *Resolver) resolveIP(host string, dnsType uint16) (ip net.IP, err error) {
ip = net.ParseIP(host)
if dnsType == D.TypeAAAA {
if ip6 := ip.To16(); ip6 != nil {
return ip6, nil
}
} else {
if ip4 := ip.To4(); ip4 != nil {
return ip4, nil
}
}
query := &D.Msg{}
query.SetQuestion(D.Fqdn(host), dnsType)
@ -282,7 +276,6 @@ type Config struct {
Main, Fallback []NameServer
IPv6 bool
EnhancedMode EnhancedMode
Hosts *trie.Trie
Pool *fakeip.Pool
}
@ -297,7 +290,6 @@ func New(config Config) *Resolver {
cache: cache.New(time.Second * 60),
mapping: config.EnhancedMode == MAPPING,
fakeip: config.EnhancedMode == FAKEIP,
hosts: config.Hosts,
pool: config.Pool,
}
if len(config.Fallback) != 0 {

7
hub/executor/executor.go
View File

@ -2,6 +2,7 @@ package executor
import (
"github.com/Dreamacro/clash/component/auth"
trie "github.com/Dreamacro/clash/component/domain-trie"
"github.com/Dreamacro/clash/config"
C "github.com/Dreamacro/clash/constant"
"github.com/Dreamacro/clash/dns"
@ -30,6 +31,7 @@ func ApplyConfig(cfg *config.Config, force bool) {
updateProxies(cfg.Proxies)
updateRules(cfg.Rules)
updateDNS(cfg.DNS)
updateHosts(cfg.Hosts)
updateExperimental(cfg.Experimental)
}
@ -68,7 +70,6 @@ func updateDNS(c *config.DNS) {
Main: c.NameServer,
Fallback: c.Fallback,
IPv6: c.IPv6,
Hosts: c.Hosts,
EnhancedMode: c.EnhancedMode,
Pool: c.FakeIPRange,
})
@ -83,6 +84,10 @@ func updateDNS(c *config.DNS) {
}
}
func updateHosts(tree *trie.Trie) {
dns.DefaultHosts = tree
}
func updateProxies(proxies map[string]C.Proxy) {
tunnel := T.Instance()
oldProxies := tunnel.Proxies()

7
tunnel/tunnel.go
View File

@ -213,6 +213,13 @@ func (t *Tunnel) match(metadata *C.Metadata) (C.Proxy, C.Rule, error) {
defer t.configMux.RUnlock()
var resolved bool
if node := dns.DefaultHosts.Search(metadata.Host); node != nil {
ip := node.Data.(net.IP)
metadata.DstIP = &ip
resolved = true
}
for _, rule := range t.rules {
if !resolved && t.shouldResolveIP(rule, metadata) {
ip, err := t.resolveIP(metadata.Host)