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Merge pull request #2037 from weaving118/master
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add ip match feature for dns
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@kslr
kslr authored Nov 21, 2019
2 parents 44aafae + debb7f0 commit e52d3fa
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Showing 5 changed files with 282 additions and 51 deletions.
83 changes: 47 additions & 36 deletions app/dns/config.pb.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ import (
fmt "fmt"
proto "github.com/golang/protobuf/proto"
math "math"
router "v2ray.com/core/app/router"
net "v2ray.com/core/common/net"
)

Expand Down Expand Up @@ -52,6 +53,7 @@ func (DomainMatchingType) EnumDescriptor() ([]byte, []int) {
type NameServer struct {
Address *net.Endpoint `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
PrioritizedDomain []*NameServer_PriorityDomain `protobuf:"bytes,2,rep,name=prioritized_domain,json=prioritizedDomain,proto3" json:"prioritized_domain,omitempty"`
Geoip []*router.GeoIP `protobuf:"bytes,3,rep,name=geoip,proto3" json:"geoip,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
Expand Down Expand Up @@ -96,6 +98,13 @@ func (m *NameServer) GetPrioritizedDomain() []*NameServer_PriorityDomain {
return nil
}

func (m *NameServer) GetGeoip() []*router.GeoIP {
if m != nil {
return m.Geoip
}
return nil
}

type NameServer_PriorityDomain struct {
Type DomainMatchingType `protobuf:"varint,1,opt,name=type,proto3,enum=v2ray.core.app.dns.DomainMatchingType" json:"type,omitempty"`
Domain string `protobuf:"bytes,2,opt,name=domain,proto3" json:"domain,omitempty"`
Expand Down Expand Up @@ -310,40 +319,42 @@ func init() {
}

var fileDescriptor_ed5695198e3def8f = []byte{
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}
4 changes: 3 additions & 1 deletion app/dns/config.proto
View file
Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@ option java_multiple_files = true;

import "v2ray.com/core/common/net/address.proto";
import "v2ray.com/core/common/net/destination.proto";
import "v2ray.com/core/app/router/config.proto";

message NameServer {
v2ray.core.common.net.Endpoint address = 1;
Expand All @@ -18,6 +19,7 @@ message NameServer {
}

repeated PriorityDomain prioritized_domain = 2;
repeated v2ray.core.app.router.GeoIP geoip = 3;
}

enum DomainMatchingType {
Expand All @@ -39,7 +41,7 @@ message Config {
// Deprecated. Use static_hosts.
map<string, v2ray.core.common.net.IPOrDomain> Hosts = 2 [deprecated = true];

// Client IP for EDNS client subnet. Must be 4 bytes (IPv4) or 16 bytes (IPv6).
// Client IP for EDNS client subnet. Must be 4 bytes (IPv4) or 16 bytes (IPv6).
bytes client_ip = 3;

message HostMapping {
Expand Down
103 changes: 95 additions & 8 deletions app/dns/server.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,9 @@ import (
"time"

"v2ray.com/core"
"v2ray.com/core/app/router"
"v2ray.com/core/common"
"v2ray.com/core/common/errors"
"v2ray.com/core/common/net"
"v2ray.com/core/common/session"
"v2ray.com/core/common/strmatcher"
Expand All @@ -28,9 +30,35 @@ type Server struct {
clientIP net.IP
domainMatcher strmatcher.IndexMatcher
domainIndexMap map[uint32]uint32
ipIndexMap map[uint32]*MultiGeoIPMatcher
tag string
}

// MultiGeoIPMatcher for match
type MultiGeoIPMatcher struct {
matchers []*router.GeoIPMatcher
}

var errExpectedIPNonMatch = errors.New("expected ip not match")

// Match check ip match
func (c *MultiGeoIPMatcher) Match(ip net.IP) bool {
for _, matcher := range c.matchers {
if matcher.Match(ip) {
return true
}
}
return false
}

// HasMatcher check has matcher
func (c *MultiGeoIPMatcher) HasMatcher() bool {
if len(c.matchers) > 0 {
return true
}
return false
}

func generateRandomTag() string {
id := uuid.New()
return "v2ray.system." + id.String()
Expand Down Expand Up @@ -87,9 +115,12 @@ func New(ctx context.Context, config *Config) (*Server, error) {
addNameServer(destPB)
}

var geoIPMatcherContainer router.GeoIPMatcherContainer

if len(config.NameServer) > 0 {
domainMatcher := &strmatcher.MatcherGroup{}
domainIndexMap := make(map[uint32]uint32)
ipIndexMap := make(map[uint32]*MultiGeoIPMatcher)

for _, ns := range config.NameServer {
idx := addNameServer(ns.Address)
Expand All @@ -102,10 +133,23 @@ func New(ctx context.Context, config *Config) (*Server, error) {
midx := domainMatcher.Add(matcher)
domainIndexMap[midx] = uint32(idx)
}

var matchers []*router.GeoIPMatcher
for _, geoip := range ns.Geoip {
matcher, err := geoIPMatcherContainer.Add(geoip)
if err != nil {
return nil, newError("failed to create ip matcher").Base(err).AtWarning()
}
matchers = append(matchers, matcher)

}
matcher := &MultiGeoIPMatcher{matchers: matchers}
ipIndexMap[uint32(idx)] = matcher
}

server.domainMatcher = domainMatcher
server.domainIndexMap = domainIndexMap
server.ipIndexMap = ipIndexMap
}

if len(server.clients) == 0 {
Expand Down Expand Up @@ -135,7 +179,35 @@ func (s *Server) IsOwnLink(ctx context.Context) bool {
return inbound != nil && inbound.Tag == s.tag
}

func (s *Server) queryIPTimeout(client Client, domain string, option IPOption) ([]net.IP, error) {
// Match check dns ip match geoip
func (s *Server) Match(idx uint32, client Client, domain string, ips []net.IP) ([]net.IP, error) {
matcher, exist := s.ipIndexMap[idx]
if exist == false {
newError("domain ", domain, " server not in ipIndexMap: ", client.Name(), " idx:", idx, " just return").AtDebug().WriteToLog()
return ips, nil
}

if matcher.HasMatcher() == false {
newError("domain ", domain, " server has not valid matcher: ", client.Name(), " idx:", idx, " just return").AtDebug().WriteToLog()
return ips, nil
}

newIps := []net.IP{}
for _, ip := range ips {
if matcher.Match(ip) {
newIps = append(newIps, ip)
newError("domain ", domain, " ip ", ip, " is match at server ", client.Name(), " idx:", idx).AtDebug().WriteToLog()
} else {
newError("domain ", domain, " ip ", ip, " is not match at server ", client.Name(), " idx:", idx).AtDebug().WriteToLog()
}
}
if len(newIps) == 0 {
return nil, errExpectedIPNonMatch
}
return newIps, nil
}

func (s *Server) queryIPTimeout(idx uint32, client Client, domain string, option IPOption) ([]net.IP, error) {
ctx, cancel := context.WithTimeout(context.Background(), time.Second*4)
if len(s.tag) > 0 {
ctx = session.ContextWithInbound(ctx, &session.Inbound{
Expand All @@ -144,6 +216,12 @@ func (s *Server) queryIPTimeout(client Client, domain string, option IPOption) (
}
ips, err := client.QueryIP(ctx, domain, option)
cancel()

if err != nil {
return ips, err
}

ips, err = s.Match(idx, client, domain, ips)
return ips, err
}

Expand Down Expand Up @@ -217,35 +295,44 @@ func (s *Server) lookupIPInternal(domain string, option IPOption) ([]net.IP, err
}

var lastErr error
var matchedClient Client
if s.domainMatcher != nil {
idx := s.domainMatcher.Match(domain)
if idx > 0 {
ns := s.clients[s.domainIndexMap[idx]]
newError("querying domain ", domain, " at ", ns.Name()).WriteToLog()
ips, err := s.queryIPTimeout(ns, domain, option)
matchedClient = s.clients[s.domainIndexMap[idx]]
newError("domain matched, direct lookup ip for domain ", domain, " at ", matchedClient.Name()).WriteToLog()
ips, err := s.queryIPTimeout(s.domainIndexMap[idx], matchedClient, domain, option)
if len(ips) > 0 {
return ips, nil
}
if err == dns.ErrEmptyResponse {
return nil, err
}
if err != nil {
newError("failed to lookup ip for domain ", domain, " at server ", ns.Name()).Base(err).WriteToLog()
newError("failed to lookup ip for domain ", domain, " at server ", matchedClient.Name()).Base(err).WriteToLog()
lastErr = err
}
}
}

for _, client := range s.clients {
ips, err := s.queryIPTimeout(client, domain, option)
for idx, client := range s.clients {
if client == matchedClient {
newError("domain ", domain, " at server ", client.Name(), " idx:", idx, " already lookup failed, just ignore").AtDebug().WriteToLog()
continue
}

newError("try to lookup ip for domain ", domain, " at server ", client.Name(), " idx:", idx).AtDebug().WriteToLog()
ips, err := s.queryIPTimeout(uint32(idx), client, domain, option)
if len(ips) > 0 {
newError("lookup ip for domain ", domain, " success: ", ips, " at server ", client.Name(), " idx:", idx).AtDebug().WriteToLog()
return ips, nil
}

if err != nil {
newError("failed to lookup ip for domain ", domain, " at server ", client.Name()).Base(err).WriteToLog()
lastErr = err
}
if err != context.Canceled && err != context.DeadlineExceeded {
if err != context.Canceled && err != context.DeadlineExceeded && err != errExpectedIPNonMatch {
return nil, err
}
}
Expand Down
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